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Changes In Branch monocypher Through [489a16edb6] Excluding Merge-Ins

This is equivalent to a diff from 542443e166 to 489a16edb6

2019-01-11
16:45
Many unrelated changes check-in: 5db79120e2 user: rkeene tags: trunk
2019-01-10
09:45
Added untested argon2-based key derivation check-in: 3872cde7b2 user: rkeene tags: monocypher
09:18
Added more Argon2 files, and try to build with as few public symbols as possible check-in: 489a16edb6 user: rkeene tags: monocypher
08:43
Added conversion to monocypher to main source check-in: 12e83a9916 user: rkeene tags: monocypher
08:41
Started switching to monocypher check-in: 1dbc43abc9 user: rkeene tags: monocypher
2018-12-09
22:11
Removed extra auto_paths check-in: 542443e166 user: rkeene tags: trunk
22:10
Added an RPC client REPL check-in: e9fd1f6094 user: rkeene tags: trunk

Modified .fossil-settings/ignore-glob from [f9b9628d3b] to [59abf1089d]. 

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nano.so
nano.o
randombytes.o
blake2b.o
tweetnacl.o
nano.syms
nano.vers
nano.tcl.h
Makefile
pkgIndex.tcl-shared
pkgIndex.tcl-static
pkgIndex.tcl
aclocal.m4
config.guess
config.sub
configure
install-sh
config.log
config.status
tweetnacl
build/tweetnacl/out
build/tweetnacl/INST
blake2b
build/blake2b/out
build/blake2b/INST
argon2
build/argon2/out
build/argon2/INST
build/work
build/tcl

Modified Makefile.in from [9775c9b8f5] to [074532d27e]. 

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CC            := @CC@
AR            := @AR@
RANLIB        := @RANLIB@
CFLAGS        := @CFLAGS@ @SHOBJFLAGS@
CPPFLAGS      := -I. -I@srcdir@ -I@srcdir@/tweetnacl/ -I@srcdir@/blake2b/ -DNACL_ED25519_BLAKE2B=1 @CPPFLAGS@ @SHOBJCPPFLAGS@ @DEFS@ @TCL_DEFS@
CPPFLAGS      := -I. -I@srcdir@ -I@srcdir@/monocypher/ -I@srcdir@/argon2/ @CPPFLAGS@ @SHOBJCPPFLAGS@ @DEFS@ @TCL_DEFS@
LDFLAGS       := @LDFLAGS@
LIBS          := @LIBS@
SHOBJLDFLAGS  := @SHOBJLDFLAGS@
VPATH         := @srcdir@
srcdir        := @srcdir@
prefix        := @prefix@
exec_prefix   := @exec_prefix@
libdir        := @libdir@
PACKAGE_VERSION     := @PACKAGE_VERSION@
TCL_PACKAGE_PATH    := @TCL_PACKAGE_PATH@
PACKAGE_INSTALL_DIR := $(TCL_PACKAGE_PATH)/tcl-nano$(PACKAGE_VERSION)
INSTALL             := @INSTALL@
INSTALL_PROGRAM     := @INSTALL_PROGRAM@
INSTALL_DATA        := @INSTALL_DATA@
export CC CFLAGS CPPFLAGS

all: @EXTENSION_TARGET@ pkgIndex.tcl

ifeq (@TCLEXT_BUILD@,shared)
@EXTENSION_TARGET@: tweetnacl.o blake2b.o randombytes.o nano.o Makefile
	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(SHOBJLDFLAGS) -o @EXTENSION_TARGET@ nano.o randombytes.o tweetnacl.o blake2b.o $(LIBS)
@EXTENSION_TARGET@: monocypher.o argon2.o randombytes.o nano.o Makefile
	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(SHOBJLDFLAGS) -o @EXTENSION_TARGET@ nano.o randombytes.o monocypher.o argon2.o $(LIBS)
	-@WEAKENSYMS@ @EXTENSION_TARGET@
	-@REMOVESYMS@ @EXTENSION_TARGET@
else
@EXTENSION_TARGET@: nano-amalgamation.o Makefile
	-@WEAKENSYMS@ nano-amalgamation.o
	-@REMOVESYMS@ nano-amalgamation.o
	$(AR) rc @EXTENSION_TARGET@ nano-amalgamation.o
	-$(RANLIB) @EXTENSION_TARGET@
endif

# The amalgamation is used when compiling statically so that the same ABI can be exposed
# to upstream projects rather than requiring them to filter out our symbols
nano-amalgamation.c: @srcdir@/nano.c @srcdir@/randombytes.c @srcdir@/tweetnacl/tweetnacl.c @srcdir@/blake2b/blake2b.c Makefile
nano-amalgamation.c: @srcdir@/nano.c @srcdir@/randombytes.c @srcdir@/monocypher/monocypher.c @srcdir@/argon2.c Makefile
	rm -f nano-amalgamation.c
	cat @srcdir@/nano.c @srcdir@/randombytes.c @srcdir@/tweetnacl/tweetnacl.c @srcdir@/blake2b/blake2b.c > nano-amalgamation.c
	cat @srcdir@/nano.c @srcdir@/randombytes.c @srcdir@/monocypher/monocypher.c @srcdir@/argon2/argon2.c > nano-amalgamation.c

nano-amalgamation.o: nano-amalgamation.c @srcdir@/tweetnacl/tweetnacl.h @srcdir@/blake2b/blake2.h @srcdir@/randombytes.h nano.tcl.h @srcdir@/blake2b/blake2-impl.h Makefile
nano-amalgamation.o: nano-amalgamation.c @srcdir@/monocypher/monocypher.h @srcdir@/argon2/argon2.h @srcdir@/randombytes.h nano.tcl.h Makefile
	$(CC) $(CPPFLAGS) $(CFLAGS) -o nano-amalgamation.o -c nano-amalgamation.c

nano.o: @srcdir@/nano.c @srcdir@/tweetnacl/tweetnacl.h @srcdir@/blake2b/blake2.h @srcdir@/randombytes.h nano.tcl.h Makefile
nano.o: @srcdir@/nano.c @srcdir@/monocypher/monocypher.h @srcdir@/argon2/argon2.h @srcdir@/randombytes.h nano.tcl.h Makefile
	$(CC) $(CPPFLAGS) $(CFLAGS) -o nano.o -c @srcdir@/nano.c

randombytes.o: @srcdir@/randombytes.c @srcdir@/randombytes.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o randombytes.o -c @srcdir@/randombytes.c

tweetnacl.o: @srcdir@/tweetnacl/tweetnacl.c @srcdir@/tweetnacl/tweetnacl.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o tweetnacl.o -c @srcdir@/tweetnacl/tweetnacl.c
monocypher.o: @srcdir@/monocypher/monocypher.c @srcdir@/monocypher/monocypher.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o monocypher.o -c @srcdir@/monocypher/monocypher.c

blake2b.o: @srcdir@/blake2b/blake2b.c @srcdir@/blake2b/blake2.h @srcdir@/blake2b/blake2-impl.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o blake2b.o -c @srcdir@/blake2b/blake2b.c
argon2.o: @srcdir@/argon2/argon2.c @srcdir@/argon2/argon2.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o argon2.o -c @srcdir@/argon2/argon2.c

pkgIndex.tcl: pkgIndex.tcl-@TCLEXT_BUILD@
	cp pkgIndex.tcl-@TCLEXT_BUILD@ pkgIndex.tcl

nano.tcl.h: @srcdir@/nano.tcl Makefile
	od -A n -v -t xC < '@srcdir@/nano.tcl' > nano.tcl.h.new.1
	sed 's@  *@@g;s@..@0x&, @g' < nano.tcl.h.new.1 > nano.tcl.h.new.2
︙
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	$(INSTALL_PROGRAM) @EXTENSION_TARGET@ '$(DESTDIR)$(PACKAGE_INSTALL_DIR)'
	$(INSTALL_DATA)    pkgIndex.tcl '$(DESTDIR)$(PACKAGE_INSTALL_DIR)'
	$(INSTALL_DATA)    @srcdir@/nano.man '$(DESTDIR)$(PACKAGE_INSTALL_DIR)'
 
clean:
	rm -f nano-amalgamation.c nano-amalgamation.o
	rm -f @EXTENSION_TARGET@ nano.o nano.gcda nano.gcno
	rm -f blake2b.o tweetnacl.o randombytes.o
	rm -f blake2b.gcda tweetnacl.gcda randombytes.gcda
	rm -f blake2b.gcno tweetnacl.gcno randombytes.gcno
	rm -f argon2.o monocypher.o randombytes.o
	rm -f argon2.gcda monocypher.gcda randombytes.gcda
	rm -f argon2.gcno monocypher.gcno randombytes.gcno
	rm -f nano-coverage.info

distclean: clean
	rm -f Makefile pkgIndex.tcl-shared pkgIndex.tcl-static nano.syms
	rm -f pkgIndex.tcl
	rm -f config.log config.status
	rm -f nano.tcl.h nano.tcl.h.new.1 nano.tcl.h.new.2
	rm -rf coverage.dir

mrproper: distclean
	rm -f @srcdir@/configure @srcdir@/aclocal.m4 @srcdir@/config.guess @srcdir@/config.sub @srcdir@/install-sh
	rm -f @srcdir@/nano.vers
	rm -rf @srcdir@/tweetnacl @srcdir@/blake2b
	rm -rf @srcdir@/argon2
	$(MAKE) -C @srcdir@/build/tweetnacl distclean
	$(MAKE) -C @srcdir@/build/blake2b distclean
	$(MAKE) -C @srcdir@/build/argon2 distclean

.PHONY: all test clean distclean mrproper

Modified autogen.sh from [50eb64ee31] to [daaff1df63].

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	exit 1
fi

autoconf

rm -rf autom4te.cache

# Assemble tweetnacl
# Assemble argon2
rm -rf tweetnacl
make -C build/tweetnacl install PREFIX="$(pwd)/tweetnacl"

# Assemble blake2b
rm -rf blake2b
make -C build/blake2b install PREFIX="$(pwd)/blake2b"
rm -rf argon2
make -C build/argon2 install PREFIX="$(pwd)/argon2"

# Assemble version script
rm -f nano.vers
(
	echo '{'
	echo $'\tglobal:'
	sed 's/@SYMPREFIX@/\t\t/g;s/$/;/' nano.syms.in
︙

Added build/argon2/Makefile version [2e6c9551be]. 












































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PREFIX := $(shell pwd)/INST

all: out/argon2.c out/argon2.h

out/argon2.c: src/argon2.c src/ref.c src/core.c src/blake2b.c src/encoding.c monocypher-blake2b.h
	mkdir -p out
	echo '#define ARGON2_NO_THREADS 1' > out/argon2.c.new.1
	echo '#define ARGON2_INTERNAL_ONLY 1' >> out/argon2.c.new.1
	cat monocypher-blake2b.h >> out/argon2.c.new.1
	echo '#include "argon2.h"' >> out/argon2.c.new.1
	sed '/^#include "/ d' src/argon2.c >> out/argon2.c.new.1
	sed '/^#include "/ d' src/encoding.c >> out/argon2.c.new.1
	sed '/^#include "/ d' src/ref.c >> out/argon2.c.new.1
	sed '/#include "/ d;/#include/ b;/Argon2 Team - Begin Code/,/Argon2 Team - End Code/ b;d' src/blake2b.c >> out/argon2.c.new.1
	sed '/^#include "/ d' src/core.c >> out/argon2.c.new.1
	sed -r '/( |\*)argon(2_ctx|2_verify|2_hash|2_type2|2_error_message|2_encodedlen|2i_|2d_|2id_)/ b;/:/ b;/^(static|extern|enum|typedef) / b;s@^[a-z]@static &@'  out/argon2.c.new.1 > out/argon2.c.new.2
	rm -f out/argon2.c.new.1
	mv out/argon2.c.new.2 out/argon2.c

out/argon2.h: src/argon2.h src/blamka-round-ref.h src/core.h src/encoding.h
	mkdir -p out
	cat src/argon2.h > out/argon2.h.new.1
	echo '#ifdef ARGON2_INTERNAL_ONLY' >> out/argon2.h.new.1
	cat src/blamka-round-ref.h src/core.h src/encoding.h >> out/argon2.h.new.1
	echo '#endif' >> out/argon2.h.new.1
	sed -r '/^extern int FLAG/ d;/#include "/ d;/( |\*)argon(2_ctx|2_verify|2_hash|2_type2|2_error_message|2_encodedlen|2i_|2d_|2id_)/ b;/:/ b;/^(static|extern|enum|typedef) / b;s@^[a-z]@static &@' out/argon2.h.new.1 > out/argon2.h.new.2
	rm -f out/argon2.h.new.1
	mv out/argon2.h.new.2 out/argon2.h

install: out/argon2.c out/argon2.h
	mkdir -p '$(PREFIX)'
	cp out/argon2.c out/argon2.h '$(PREFIX)'

clean:
	rm -f out/argon2.c out/argon2.h
	rm -f out/argon2.c.new.1 out/argon2.c.new.2
	rm -f out/argon2.h.new.1 out/argon2.h.new.2
	-rmdir out

distclean: clean

.PHONY: all install clean distclean








Added build/argon2/monocypher-blake2b.h version [b2dc3556d1].
































































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#define crypto_hash(out, in, inlen) crypto_blake2b(out, in, inlen)
#define blake2b(out, outlen, in, inlen, key, keylen) 0, crypto_blake2b_general(out, outlen, key, keylen, in, inlen)
#define blake2b_state crypto_blake2b_ctx
#define blake2b_init(ctx, outlen) 0; crypto_blake2b_general_init(ctx, outlen, NULL, 0)
#define blake2b_update(ctx, in, inlen) 0; crypto_blake2b_update(ctx, in, inlen)
#define blake2b_final(ctx, out, ignore1) 0; crypto_blake2b_final(ctx, out)
#define BLAKE2_INLINE
#define BLAKE2B_OUTBYTES 64
#include <stdint.h>
#include "monocypher.h"
static BLAKE2_INLINE uint64_t rotr64(uint64_t x, uint64_t n) { return (x >> n) ^ (x << (64 - n)); }
static BLAKE2_INLINE void store32( void *dst, uint32_t w )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  memcpy(dst, &w, sizeof w);
#else
  uint8_t *p = ( uint8_t * )dst;
  p[0] = (uint8_t)(w >>  0);
  p[1] = (uint8_t)(w >>  8);
  p[2] = (uint8_t)(w >> 16);
  p[3] = (uint8_t)(w >> 24);
#endif
}

static BLAKE2_INLINE void store64( void *dst, uint64_t w )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  memcpy(dst, &w, sizeof w);
#else
  uint8_t *p = ( uint8_t * )dst;
  p[0] = (uint8_t)(w >>  0);
  p[1] = (uint8_t)(w >>  8);
  p[2] = (uint8_t)(w >> 16);
  p[3] = (uint8_t)(w >> 24);
  p[4] = (uint8_t)(w >> 32);
  p[5] = (uint8_t)(w >> 40);
  p[6] = (uint8_t)(w >> 48);
  p[7] = (uint8_t)(w >> 56);
#endif
}

static BLAKE2_INLINE uint64_t load64( const void *src )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  uint64_t w;
  memcpy(&w, src, sizeof w);
  return w;
#else
  const uint8_t *p = ( const uint8_t * )src;
  return (( uint64_t )( p[0] ) <<  0) |
         (( uint64_t )( p[1] ) <<  8) |
         (( uint64_t )( p[2] ) << 16) |
         (( uint64_t )( p[3] ) << 24) |
         (( uint64_t )( p[4] ) << 32) |
         (( uint64_t )( p[5] ) << 40) |
         (( uint64_t )( p[6] ) << 48) |
         (( uint64_t )( p[7] ) << 56) ;
#endif
}









Added build/argon2/src/argon2.c version [f1814855c1].








































































































































































































































































































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#include "argon2.h"
#include "encoding.h"
#include "core.h"

const char *argon2_type2string(argon2_type type, int uppercase) {
    switch (type) {
        case Argon2_d:
            return uppercase ? "Argon2d" : "argon2d";
        case Argon2_i:
            return uppercase ? "Argon2i" : "argon2i";
        case Argon2_id:
            return uppercase ? "Argon2id" : "argon2id";
    }

    return NULL;
}

int argon2_ctx(argon2_context *context, argon2_type type) {
    /* 1. Validate all inputs */
    int result = validate_inputs(context);
    uint32_t memory_blocks, segment_length;
    argon2_instance_t instance;

    if (ARGON2_OK != result) {
        return result;
    }

    if (Argon2_d != type && Argon2_i != type && Argon2_id != type) {
        return ARGON2_INCORRECT_TYPE;
    }

    /* 2. Align memory size */
    /* Minimum memory_blocks = 8L blocks, where L is the number of lanes */
    memory_blocks = context->m_cost;

    if (memory_blocks < 2 * ARGON2_SYNC_POINTS * context->lanes) {
        memory_blocks = 2 * ARGON2_SYNC_POINTS * context->lanes;
    }

    segment_length = memory_blocks / (context->lanes * ARGON2_SYNC_POINTS);
    /* Ensure that all segments have equal length */
    memory_blocks = segment_length * (context->lanes * ARGON2_SYNC_POINTS);

    instance.version = context->version;
    instance.memory = NULL;
    instance.passes = context->t_cost;
    instance.memory_blocks = memory_blocks;
    instance.segment_length = segment_length;
    instance.lane_length = segment_length * ARGON2_SYNC_POINTS;
    instance.lanes = context->lanes;
    instance.threads = context->threads;
    instance.type = type;

    if (instance.threads > instance.lanes) {
        instance.threads = instance.lanes;
    }

    /* 3. Initialization: Hashing inputs, allocating memory, filling first
     * blocks
     */
    result = initialize(&instance, context);

    if (ARGON2_OK != result) {
        return result;
    }

    /* 4. Filling memory */
    result = fill_memory_blocks(&instance);

    if (ARGON2_OK != result) {
        return result;
    }
    /* 5. Finalization */
    finalize(context, &instance);

    return ARGON2_OK;
}

int argon2_hash(const uint32_t t_cost, const uint32_t m_cost,
                const uint32_t parallelism, const void *pwd,
                const size_t pwdlen, const void *salt, const size_t saltlen,
                void *hash, const size_t hashlen, char *encoded,
                const size_t encodedlen, argon2_type type,
                const uint32_t version){

    argon2_context context;
    int result;
    uint8_t *out;

    if (pwdlen > ARGON2_MAX_PWD_LENGTH) {
        return ARGON2_PWD_TOO_LONG;
    }

    if (saltlen > ARGON2_MAX_SALT_LENGTH) {
        return ARGON2_SALT_TOO_LONG;
    }

    if (hashlen > ARGON2_MAX_OUTLEN) {
        return ARGON2_OUTPUT_TOO_LONG;
    }

    if (hashlen < ARGON2_MIN_OUTLEN) {
        return ARGON2_OUTPUT_TOO_SHORT;
    }

    out = malloc(hashlen);
    if (!out) {
        return ARGON2_MEMORY_ALLOCATION_ERROR;
    }

    context.out = (uint8_t *)out;
    context.outlen = (uint32_t)hashlen;
    context.pwd = CONST_CAST(uint8_t *)pwd;
    context.pwdlen = (uint32_t)pwdlen;
    context.salt = CONST_CAST(uint8_t *)salt;
    context.saltlen = (uint32_t)saltlen;
    context.secret = NULL;
    context.secretlen = 0;
    context.ad = NULL;
    context.adlen = 0;
    context.t_cost = t_cost;
    context.m_cost = m_cost;
    context.lanes = parallelism;
    context.threads = parallelism;
    context.allocate_cbk = NULL;
    context.free_cbk = NULL;
    context.flags = ARGON2_DEFAULT_FLAGS;
    context.version = version;

    result = argon2_ctx(&context, type);

    if (result != ARGON2_OK) {
        clear_internal_memory(out, hashlen);
        free(out);
        return result;
    }

    /* if raw hash requested, write it */
    if (hash) {
        memcpy(hash, out, hashlen);
    }

    /* if encoding requested, write it */
    if (encoded && encodedlen) {
        if (encode_string(encoded, encodedlen, &context, type) != ARGON2_OK) {
            clear_internal_memory(out, hashlen); /* wipe buffers if error */
            clear_internal_memory(encoded, encodedlen);
            free(out);
            return ARGON2_ENCODING_FAIL;
        }
    }
    clear_internal_memory(out, hashlen);
    free(out);

    return ARGON2_OK;
}

int argon2i_hash_encoded(const uint32_t t_cost, const uint32_t m_cost,
                         const uint32_t parallelism, const void *pwd,
                         const size_t pwdlen, const void *salt,
                         const size_t saltlen, const size_t hashlen,
                         char *encoded, const size_t encodedlen) {

    return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
                       NULL, hashlen, encoded, encodedlen, Argon2_i,
                       ARGON2_VERSION_NUMBER);
}

int argon2i_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
                     const uint32_t parallelism, const void *pwd,
                     const size_t pwdlen, const void *salt,
                     const size_t saltlen, void *hash, const size_t hashlen) {

    return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
                       hash, hashlen, NULL, 0, Argon2_i, ARGON2_VERSION_NUMBER);
}

int argon2d_hash_encoded(const uint32_t t_cost, const uint32_t m_cost,
                         const uint32_t parallelism, const void *pwd,
                         const size_t pwdlen, const void *salt,
                         const size_t saltlen, const size_t hashlen,
                         char *encoded, const size_t encodedlen) {

    return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
                       NULL, hashlen, encoded, encodedlen, Argon2_d,
                       ARGON2_VERSION_NUMBER);
}

int argon2d_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
                     const uint32_t parallelism, const void *pwd,
                     const size_t pwdlen, const void *salt,
                     const size_t saltlen, void *hash, const size_t hashlen) {

    return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
                       hash, hashlen, NULL, 0, Argon2_d, ARGON2_VERSION_NUMBER);
}

int argon2id_hash_encoded(const uint32_t t_cost, const uint32_t m_cost,
                          const uint32_t parallelism, const void *pwd,
                          const size_t pwdlen, const void *salt,
                          const size_t saltlen, const size_t hashlen,
                          char *encoded, const size_t encodedlen) {

    return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
                       NULL, hashlen, encoded, encodedlen, Argon2_id,
                       ARGON2_VERSION_NUMBER);
}

int argon2id_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
                      const uint32_t parallelism, const void *pwd,
                      const size_t pwdlen, const void *salt,
                      const size_t saltlen, void *hash, const size_t hashlen) {
    return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
                       hash, hashlen, NULL, 0, Argon2_id,
                       ARGON2_VERSION_NUMBER);
}

static int argon2_compare(const uint8_t *b1, const uint8_t *b2, size_t len) {
    size_t i;
    uint8_t d = 0U;

    for (i = 0U; i < len; i++) {
        d |= b1[i] ^ b2[i];
    }
    return (int)((1 & ((d - 1) >> 8)) - 1);
}

int argon2_verify(const char *encoded, const void *pwd, const size_t pwdlen,
                  argon2_type type) {

    argon2_context ctx;
    uint8_t *desired_result = NULL;

    int ret = ARGON2_OK;

    size_t encoded_len;
    uint32_t max_field_len;

    if (pwdlen > ARGON2_MAX_PWD_LENGTH) {
        return ARGON2_PWD_TOO_LONG;
    }

    if (encoded == NULL) {
        return ARGON2_DECODING_FAIL;
    }

    encoded_len = strlen(encoded);
    if (encoded_len > UINT32_MAX) {
        return ARGON2_DECODING_FAIL;
    }

    /* No field can be longer than the encoded length */
    max_field_len = (uint32_t)encoded_len;

    ctx.saltlen = max_field_len;
    ctx.outlen = max_field_len;

    ctx.salt = malloc(ctx.saltlen);
    ctx.out = malloc(ctx.outlen);
    if (!ctx.salt || !ctx.out) {
        ret = ARGON2_MEMORY_ALLOCATION_ERROR;
        goto fail;
    }

    ctx.pwd = (uint8_t *)pwd;
    ctx.pwdlen = (uint32_t)pwdlen;

    ret = decode_string(&ctx, encoded, type);
    if (ret != ARGON2_OK) {
        goto fail;
    }

    /* Set aside the desired result, and get a new buffer. */
    desired_result = ctx.out;
    ctx.out = malloc(ctx.outlen);
    if (!ctx.out) {
        ret = ARGON2_MEMORY_ALLOCATION_ERROR;
        goto fail;
    }

    ret = argon2_verify_ctx(&ctx, (char *)desired_result, type);
    if (ret != ARGON2_OK) {
        goto fail;
    }

fail:
    free(ctx.salt);
    free(ctx.out);
    free(desired_result);

    return ret;
}

int argon2i_verify(const char *encoded, const void *pwd, const size_t pwdlen) {

    return argon2_verify(encoded, pwd, pwdlen, Argon2_i);
}

int argon2d_verify(const char *encoded, const void *pwd, const size_t pwdlen) {

    return argon2_verify(encoded, pwd, pwdlen, Argon2_d);
}

int argon2id_verify(const char *encoded, const void *pwd, const size_t pwdlen) {

    return argon2_verify(encoded, pwd, pwdlen, Argon2_id);
}

int argon2d_ctx(argon2_context *context) {
    return argon2_ctx(context, Argon2_d);
}

int argon2i_ctx(argon2_context *context) {
    return argon2_ctx(context, Argon2_i);
}

int argon2id_ctx(argon2_context *context) {
    return argon2_ctx(context, Argon2_id);
}

int argon2_verify_ctx(argon2_context *context, const char *hash,
                      argon2_type type) {
    int ret = argon2_ctx(context, type);
    if (ret != ARGON2_OK) {
        return ret;
    }

    if (argon2_compare((uint8_t *)hash, context->out, context->outlen)) {
        return ARGON2_VERIFY_MISMATCH;
    }

    return ARGON2_OK;
}

int argon2d_verify_ctx(argon2_context *context, const char *hash) {
    return argon2_verify_ctx(context, hash, Argon2_d);
}

int argon2i_verify_ctx(argon2_context *context, const char *hash) {
    return argon2_verify_ctx(context, hash, Argon2_i);
}

int argon2id_verify_ctx(argon2_context *context, const char *hash) {
    return argon2_verify_ctx(context, hash, Argon2_id);
}

const char *argon2_error_message(int error_code) {
    switch (error_code) {
    case ARGON2_OK:
        return "OK";
    case ARGON2_OUTPUT_PTR_NULL:
        return "Output pointer is NULL";
    case ARGON2_OUTPUT_TOO_SHORT:
        return "Output is too short";
    case ARGON2_OUTPUT_TOO_LONG:
        return "Output is too long";
    case ARGON2_PWD_TOO_SHORT:
        return "Password is too short";
    case ARGON2_PWD_TOO_LONG:
        return "Password is too long";
    case ARGON2_SALT_TOO_SHORT:
        return "Salt is too short";
    case ARGON2_SALT_TOO_LONG:
        return "Salt is too long";
    case ARGON2_AD_TOO_SHORT:
        return "Associated data is too short";
    case ARGON2_AD_TOO_LONG:
        return "Associated data is too long";
    case ARGON2_SECRET_TOO_SHORT:
        return "Secret is too short";
    case ARGON2_SECRET_TOO_LONG:
        return "Secret is too long";
    case ARGON2_TIME_TOO_SMALL:
        return "Time cost is too small";
    case ARGON2_TIME_TOO_LARGE:
        return "Time cost is too large";
    case ARGON2_MEMORY_TOO_LITTLE:
        return "Memory cost is too small";
    case ARGON2_MEMORY_TOO_MUCH:
        return "Memory cost is too large";
    case ARGON2_LANES_TOO_FEW:
        return "Too few lanes";
    case ARGON2_LANES_TOO_MANY:
        return "Too many lanes";
    case ARGON2_PWD_PTR_MISMATCH:
        return "Password pointer is NULL, but password length is not 0";
    case ARGON2_SALT_PTR_MISMATCH:
        return "Salt pointer is NULL, but salt length is not 0";
    case ARGON2_SECRET_PTR_MISMATCH:
        return "Secret pointer is NULL, but secret length is not 0";
    case ARGON2_AD_PTR_MISMATCH:
        return "Associated data pointer is NULL, but ad length is not 0";
    case ARGON2_MEMORY_ALLOCATION_ERROR:
        return "Memory allocation error";
    case ARGON2_FREE_MEMORY_CBK_NULL:
        return "The free memory callback is NULL";
    case ARGON2_ALLOCATE_MEMORY_CBK_NULL:
        return "The allocate memory callback is NULL";
    case ARGON2_INCORRECT_PARAMETER:
        return "Argon2_Context context is NULL";
    case ARGON2_INCORRECT_TYPE:
        return "There is no such version of Argon2";
    case ARGON2_OUT_PTR_MISMATCH:
        return "Output pointer mismatch";
    case ARGON2_THREADS_TOO_FEW:
        return "Not enough threads";
    case ARGON2_THREADS_TOO_MANY:
        return "Too many threads";
    case ARGON2_MISSING_ARGS:
        return "Missing arguments";
    case ARGON2_ENCODING_FAIL:
        return "Encoding failed";
    case ARGON2_DECODING_FAIL:
        return "Decoding failed";
    case ARGON2_THREAD_FAIL:
        return "Threading failure";
    case ARGON2_DECODING_LENGTH_FAIL:
        return "Some of encoded parameters are too long or too short";
    case ARGON2_VERIFY_MISMATCH:
        return "The password does not match the supplied hash";
    default:
        return "Unknown error code";
    }
}

size_t argon2_encodedlen(uint32_t t_cost, uint32_t m_cost, uint32_t parallelism,
                         uint32_t saltlen, uint32_t hashlen, argon2_type type) {
  return strlen("$$v=$m=,t=,p=$$") + strlen(argon2_type2string(type, 0)) +
         numlen(t_cost) + numlen(m_cost) + numlen(parallelism) +
         b64len(saltlen) + b64len(hashlen) + numlen(ARGON2_VERSION_NUMBER) + 1;
}








Added build/argon2/src/argon2.h version [0188db9d46].

























































































































































































































































































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#ifndef ARGON2_H
#define ARGON2_H

#include <stdint.h>
#include <stddef.h>
#include <limits.h>

#if defined(__cplusplus)
extern "C" {
#endif

/* Symbols visibility control */
#ifdef A2_VISCTL
#define ARGON2_PUBLIC __attribute__((visibility("default")))
#define ARGON2_LOCAL __attribute__ ((visibility ("hidden")))
#elif _MSC_VER
#define ARGON2_PUBLIC __declspec(dllexport)
#define ARGON2_LOCAL
#else
#define ARGON2_PUBLIC
#define ARGON2_LOCAL
#endif

/*
 * Argon2 input parameter restrictions
 */

/* Minimum and maximum number of lanes (degree of parallelism) */
#define ARGON2_MIN_LANES UINT32_C(1)
#define ARGON2_MAX_LANES UINT32_C(0xFFFFFF)

/* Minimum and maximum number of threads */
#define ARGON2_MIN_THREADS UINT32_C(1)
#define ARGON2_MAX_THREADS UINT32_C(0xFFFFFF)

/* Number of synchronization points between lanes per pass */
#define ARGON2_SYNC_POINTS UINT32_C(4)

/* Minimum and maximum digest size in bytes */
#define ARGON2_MIN_OUTLEN UINT32_C(4)
#define ARGON2_MAX_OUTLEN UINT32_C(0xFFFFFFFF)

/* Minimum and maximum number of memory blocks (each of BLOCK_SIZE bytes) */
#define ARGON2_MIN_MEMORY (2 * ARGON2_SYNC_POINTS) /* 2 blocks per slice */

#define ARGON2_MIN(a, b) ((a) < (b) ? (a) : (b))
/* Max memory size is addressing-space/2, topping at 2^32 blocks (4 TB) */
#define ARGON2_MAX_MEMORY_BITS                                                 \
    ARGON2_MIN(UINT32_C(32), (sizeof(void *) * CHAR_BIT - 10 - 1))
#define ARGON2_MAX_MEMORY                                                      \
    ARGON2_MIN(UINT32_C(0xFFFFFFFF), UINT64_C(1) << ARGON2_MAX_MEMORY_BITS)

/* Minimum and maximum number of passes */
#define ARGON2_MIN_TIME UINT32_C(1)
#define ARGON2_MAX_TIME UINT32_C(0xFFFFFFFF)

/* Minimum and maximum password length in bytes */
#define ARGON2_MIN_PWD_LENGTH UINT32_C(0)
#define ARGON2_MAX_PWD_LENGTH UINT32_C(0xFFFFFFFF)

/* Minimum and maximum associated data length in bytes */
#define ARGON2_MIN_AD_LENGTH UINT32_C(0)
#define ARGON2_MAX_AD_LENGTH UINT32_C(0xFFFFFFFF)

/* Minimum and maximum salt length in bytes */
#define ARGON2_MIN_SALT_LENGTH UINT32_C(8)
#define ARGON2_MAX_SALT_LENGTH UINT32_C(0xFFFFFFFF)

/* Minimum and maximum key length in bytes */
#define ARGON2_MIN_SECRET UINT32_C(0)
#define ARGON2_MAX_SECRET UINT32_C(0xFFFFFFFF)

/* Flags to determine which fields are securely wiped (default = no wipe). */
#define ARGON2_DEFAULT_FLAGS UINT32_C(0)
#define ARGON2_FLAG_CLEAR_PASSWORD (UINT32_C(1) << 0)
#define ARGON2_FLAG_CLEAR_SECRET (UINT32_C(1) << 1)

/* Global flag to determine if we are wiping internal memory buffers. This flag
 * is defined in core.c and defaults to 1 (wipe internal memory). */
extern int FLAG_clear_internal_memory;

/* Error codes */
typedef enum Argon2_ErrorCodes {
    ARGON2_OK = 0,

    ARGON2_OUTPUT_PTR_NULL = -1,

    ARGON2_OUTPUT_TOO_SHORT = -2,
    ARGON2_OUTPUT_TOO_LONG = -3,

    ARGON2_PWD_TOO_SHORT = -4,
    ARGON2_PWD_TOO_LONG = -5,

    ARGON2_SALT_TOO_SHORT = -6,
    ARGON2_SALT_TOO_LONG = -7,

    ARGON2_AD_TOO_SHORT = -8,
    ARGON2_AD_TOO_LONG = -9,

    ARGON2_SECRET_TOO_SHORT = -10,
    ARGON2_SECRET_TOO_LONG = -11,

    ARGON2_TIME_TOO_SMALL = -12,
    ARGON2_TIME_TOO_LARGE = -13,

    ARGON2_MEMORY_TOO_LITTLE = -14,
    ARGON2_MEMORY_TOO_MUCH = -15,

    ARGON2_LANES_TOO_FEW = -16,
    ARGON2_LANES_TOO_MANY = -17,

    ARGON2_PWD_PTR_MISMATCH = -18,    /* NULL ptr with non-zero length */
    ARGON2_SALT_PTR_MISMATCH = -19,   /* NULL ptr with non-zero length */
    ARGON2_SECRET_PTR_MISMATCH = -20, /* NULL ptr with non-zero length */
    ARGON2_AD_PTR_MISMATCH = -21,     /* NULL ptr with non-zero length */

    ARGON2_MEMORY_ALLOCATION_ERROR = -22,

    ARGON2_FREE_MEMORY_CBK_NULL = -23,
    ARGON2_ALLOCATE_MEMORY_CBK_NULL = -24,

    ARGON2_INCORRECT_PARAMETER = -25,
    ARGON2_INCORRECT_TYPE = -26,

    ARGON2_OUT_PTR_MISMATCH = -27,

    ARGON2_THREADS_TOO_FEW = -28,
    ARGON2_THREADS_TOO_MANY = -29,

    ARGON2_MISSING_ARGS = -30,

    ARGON2_ENCODING_FAIL = -31,

    ARGON2_DECODING_FAIL = -32,

    ARGON2_THREAD_FAIL = -33,

    ARGON2_DECODING_LENGTH_FAIL = -34,

    ARGON2_VERIFY_MISMATCH = -35
} argon2_error_codes;

/* Memory allocator types --- for external allocation */
typedef int (*allocate_fptr)(uint8_t **memory, size_t bytes_to_allocate);
typedef void (*deallocate_fptr)(uint8_t *memory, size_t bytes_to_allocate);

/* Argon2 external data structures */

/*
 *****
 * Context: structure to hold Argon2 inputs:
 *  output array and its length,
 *  password and its length,
 *  salt and its length,
 *  secret and its length,
 *  associated data and its length,
 *  number of passes, amount of used memory (in KBytes, can be rounded up a bit)
 *  number of parallel threads that will be run.
 * All the parameters above affect the output hash value.
 * Additionally, two function pointers can be provided to allocate and
 * deallocate the memory (if NULL, memory will be allocated internally).
 * Also, three flags indicate whether to erase password, secret as soon as they
 * are pre-hashed (and thus not needed anymore), and the entire memory
 *****
 * Simplest situation: you have output array out[8], password is stored in
 * pwd[32], salt is stored in salt[16], you do not have keys nor associated
 * data. You need to spend 1 GB of RAM and you run 5 passes of Argon2d with
 * 4 parallel lanes.
 * You want to erase the password, but you're OK with last pass not being
 * erased. You want to use the default memory allocator.
 * Then you initialize:
 Argon2_Context(out,8,pwd,32,salt,16,NULL,0,NULL,0,5,1<<20,4,4,NULL,NULL,true,false,false,false)
 */
typedef struct Argon2_Context {
    uint8_t *out;    /* output array */
    uint32_t outlen; /* digest length */

    uint8_t *pwd;    /* password array */
    uint32_t pwdlen; /* password length */

    uint8_t *salt;    /* salt array */
    uint32_t saltlen; /* salt length */

    uint8_t *secret;    /* key array */
    uint32_t secretlen; /* key length */

    uint8_t *ad;    /* associated data array */
    uint32_t adlen; /* associated data length */

    uint32_t t_cost;  /* number of passes */
    uint32_t m_cost;  /* amount of memory requested (KB) */
    uint32_t lanes;   /* number of lanes */
    uint32_t threads; /* maximum number of threads */

    uint32_t version; /* version number */

    allocate_fptr allocate_cbk; /* pointer to memory allocator */
    deallocate_fptr free_cbk;   /* pointer to memory deallocator */

    uint32_t flags; /* array of bool options */
} argon2_context;

/* Argon2 primitive type */
typedef enum Argon2_type {
  Argon2_d = 0,
  Argon2_i = 1,
  Argon2_id = 2
} argon2_type;

/* Version of the algorithm */
typedef enum Argon2_version {
    ARGON2_VERSION_10 = 0x10,
    ARGON2_VERSION_13 = 0x13,
    ARGON2_VERSION_NUMBER = ARGON2_VERSION_13
} argon2_version;

/*
 * Function that gives the string representation of an argon2_type.
 * @param type The argon2_type that we want the string for
 * @param uppercase Whether the string should have the first letter uppercase
 * @return NULL if invalid type, otherwise the string representation.
 */
ARGON2_PUBLIC const char *argon2_type2string(argon2_type type, int uppercase);

/*
 * Function that performs memory-hard hashing with certain degree of parallelism
 * @param  context  Pointer to the Argon2 internal structure
 * @return Error code if smth is wrong, ARGON2_OK otherwise
 */
ARGON2_PUBLIC int argon2_ctx(argon2_context *context, argon2_type type);

/**
 * Hashes a password with Argon2i, producing an encoded hash
 * @param t_cost Number of iterations
 * @param m_cost Sets memory usage to m_cost kibibytes
 * @param parallelism Number of threads and compute lanes
 * @param pwd Pointer to password
 * @param pwdlen Password size in bytes
 * @param salt Pointer to salt
 * @param saltlen Salt size in bytes
 * @param hashlen Desired length of the hash in bytes
 * @param encoded Buffer where to write the encoded hash
 * @param encodedlen Size of the buffer (thus max size of the encoded hash)
 * @pre   Different parallelism levels will give different results
 * @pre   Returns ARGON2_OK if successful
 */
ARGON2_PUBLIC int argon2i_hash_encoded(const uint32_t t_cost,
                                       const uint32_t m_cost,
                                       const uint32_t parallelism,
                                       const void *pwd, const size_t pwdlen,
                                       const void *salt, const size_t saltlen,
                                       const size_t hashlen, char *encoded,
                                       const size_t encodedlen);

/**
 * Hashes a password with Argon2i, producing a raw hash at @hash
 * @param t_cost Number of iterations
 * @param m_cost Sets memory usage to m_cost kibibytes
 * @param parallelism Number of threads and compute lanes
 * @param pwd Pointer to password
 * @param pwdlen Password size in bytes
 * @param salt Pointer to salt
 * @param saltlen Salt size in bytes
 * @param hash Buffer where to write the raw hash - updated by the function
 * @param hashlen Desired length of the hash in bytes
 * @pre   Different parallelism levels will give different results
 * @pre   Returns ARGON2_OK if successful
 */
ARGON2_PUBLIC int argon2i_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
                                   const uint32_t parallelism, const void *pwd,
                                   const size_t pwdlen, const void *salt,
                                   const size_t saltlen, void *hash,
                                   const size_t hashlen);

ARGON2_PUBLIC int argon2d_hash_encoded(const uint32_t t_cost,
                                       const uint32_t m_cost,
                                       const uint32_t parallelism,
                                       const void *pwd, const size_t pwdlen,
                                       const void *salt, const size_t saltlen,
                                       const size_t hashlen, char *encoded,
                                       const size_t encodedlen);

ARGON2_PUBLIC int argon2d_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
                                   const uint32_t parallelism, const void *pwd,
                                   const size_t pwdlen, const void *salt,
                                   const size_t saltlen, void *hash,
                                   const size_t hashlen);

ARGON2_PUBLIC int argon2id_hash_encoded(const uint32_t t_cost,
                                        const uint32_t m_cost,
                                        const uint32_t parallelism,
                                        const void *pwd, const size_t pwdlen,
                                        const void *salt, const size_t saltlen,
                                        const size_t hashlen, char *encoded,
                                        const size_t encodedlen);

ARGON2_PUBLIC int argon2id_hash_raw(const uint32_t t_cost,
                                    const uint32_t m_cost,
                                    const uint32_t parallelism, const void *pwd,
                                    const size_t pwdlen, const void *salt,
                                    const size_t saltlen, void *hash,
                                    const size_t hashlen);

/* generic function underlying the above ones */
ARGON2_PUBLIC int argon2_hash(const uint32_t t_cost, const uint32_t m_cost,
                              const uint32_t parallelism, const void *pwd,
                              const size_t pwdlen, const void *salt,
                              const size_t saltlen, void *hash,
                              const size_t hashlen, char *encoded,
                              const size_t encodedlen, argon2_type type,
                              const uint32_t version);

/**
 * Verifies a password against an encoded string
 * Encoded string is restricted as in validate_inputs()
 * @param encoded String encoding parameters, salt, hash
 * @param pwd Pointer to password
 * @pre   Returns ARGON2_OK if successful
 */
ARGON2_PUBLIC int argon2i_verify(const char *encoded, const void *pwd,
                                 const size_t pwdlen);

ARGON2_PUBLIC int argon2d_verify(const char *encoded, const void *pwd,
                                 const size_t pwdlen);

ARGON2_PUBLIC int argon2id_verify(const char *encoded, const void *pwd,
                                  const size_t pwdlen);

/* generic function underlying the above ones */
ARGON2_PUBLIC int argon2_verify(const char *encoded, const void *pwd,
                                const size_t pwdlen, argon2_type type);

/**
 * Argon2d: Version of Argon2 that picks memory blocks depending
 * on the password and salt. Only for side-channel-free
 * environment!!
 *****
 * @param  context  Pointer to current Argon2 context
 * @return  Zero if successful, a non zero error code otherwise
 */
ARGON2_PUBLIC int argon2d_ctx(argon2_context *context);

/**
 * Argon2i: Version of Argon2 that picks memory blocks
 * independent on the password and salt. Good for side-channels,
 * but worse w.r.t. tradeoff attacks if only one pass is used.
 *****
 * @param  context  Pointer to current Argon2 context
 * @return  Zero if successful, a non zero error code otherwise
 */
ARGON2_PUBLIC int argon2i_ctx(argon2_context *context);

/**
 * Argon2id: Version of Argon2 where the first half-pass over memory is
 * password-independent, the rest are password-dependent (on the password and
 * salt). OK against side channels (they reduce to 1/2-pass Argon2i), and
 * better with w.r.t. tradeoff attacks (similar to Argon2d).
 *****
 * @param  context  Pointer to current Argon2 context
 * @return  Zero if successful, a non zero error code otherwise
 */
ARGON2_PUBLIC int argon2id_ctx(argon2_context *context);

/**
 * Verify if a given password is correct for Argon2d hashing
 * @param  context  Pointer to current Argon2 context
 * @param  hash  The password hash to verify. The length of the hash is
 * specified by the context outlen member
 * @return  Zero if successful, a non zero error code otherwise
 */
ARGON2_PUBLIC int argon2d_verify_ctx(argon2_context *context, const char *hash);

/**
 * Verify if a given password is correct for Argon2i hashing
 * @param  context  Pointer to current Argon2 context
 * @param  hash  The password hash to verify. The length of the hash is
 * specified by the context outlen member
 * @return  Zero if successful, a non zero error code otherwise
 */
ARGON2_PUBLIC int argon2i_verify_ctx(argon2_context *context, const char *hash);

/**
 * Verify if a given password is correct for Argon2id hashing
 * @param  context  Pointer to current Argon2 context
 * @param  hash  The password hash to verify. The length of the hash is
 * specified by the context outlen member
 * @return  Zero if successful, a non zero error code otherwise
 */
ARGON2_PUBLIC int argon2id_verify_ctx(argon2_context *context,
                                      const char *hash);

/* generic function underlying the above ones */
ARGON2_PUBLIC int argon2_verify_ctx(argon2_context *context, const char *hash,
                                    argon2_type type);

/**
 * Get the associated error message for given error code
 * @return  The error message associated with the given error code
 */
ARGON2_PUBLIC const char *argon2_error_message(int error_code);

/**
 * Returns the encoded hash length for the given input parameters
 * @param t_cost  Number of iterations
 * @param m_cost  Memory usage in kibibytes
 * @param parallelism  Number of threads; used to compute lanes
 * @param saltlen  Salt size in bytes
 * @param hashlen  Hash size in bytes
 * @param type The argon2_type that we want the encoded length for
 * @return  The encoded hash length in bytes
 */
ARGON2_PUBLIC size_t argon2_encodedlen(uint32_t t_cost, uint32_t m_cost,
                                       uint32_t parallelism, uint32_t saltlen,
                                       uint32_t hashlen, argon2_type type);

#if defined(__cplusplus)
}
#endif

#endif








Added build/argon2/src/blake2b.c version [7813c84d03].










































































































































































































































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#include <stdint.h>
#include <string.h>
#include <stdio.h>

#include "blake2.h"
#include "blake2-impl.h"

static const uint64_t blake2b_IV[8] = {
    UINT64_C(0x6a09e667f3bcc908), UINT64_C(0xbb67ae8584caa73b),
    UINT64_C(0x3c6ef372fe94f82b), UINT64_C(0xa54ff53a5f1d36f1),
    UINT64_C(0x510e527fade682d1), UINT64_C(0x9b05688c2b3e6c1f),
    UINT64_C(0x1f83d9abfb41bd6b), UINT64_C(0x5be0cd19137e2179)};

static const unsigned int blake2b_sigma[12][16] = {
    {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
    {14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3},
    {11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4},
    {7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8},
    {9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13},
    {2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9},
    {12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11},
    {13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10},
    {6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5},
    {10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0},
    {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
    {14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3},
};

static BLAKE2_INLINE void blake2b_set_lastnode(blake2b_state *S) {
    S->f[1] = (uint64_t)-1;
}

static BLAKE2_INLINE void blake2b_set_lastblock(blake2b_state *S) {
    if (S->last_node) {
        blake2b_set_lastnode(S);
    }
    S->f[0] = (uint64_t)-1;
}

static BLAKE2_INLINE void blake2b_increment_counter(blake2b_state *S,
                                                    uint64_t inc) {
    S->t[0] += inc;
    S->t[1] += (S->t[0] < inc);
}

static BLAKE2_INLINE void blake2b_invalidate_state(blake2b_state *S) {
    clear_internal_memory(S, sizeof(*S));      /* wipe */
    blake2b_set_lastblock(S); /* invalidate for further use */
}

static BLAKE2_INLINE void blake2b_init0(blake2b_state *S) {
    memset(S, 0, sizeof(*S));
    memcpy(S->h, blake2b_IV, sizeof(S->h));
}

int blake2b_init_param(blake2b_state *S, const blake2b_param *P) {
    const unsigned char *p = (const unsigned char *)P;
    unsigned int i;

    if (NULL == P || NULL == S) {
        return -1;
    }

    blake2b_init0(S);
    /* IV XOR Parameter Block */
    for (i = 0; i < 8; ++i) {
        S->h[i] ^= load64(&p[i * sizeof(S->h[i])]);
    }
    S->outlen = P->digest_length;
    return 0;
}

/* Sequential blake2b initialization */
int blake2b_init(blake2b_state *S, size_t outlen) {
    blake2b_param P;

    if (S == NULL) {
        return -1;
    }

    if ((outlen == 0) || (outlen > BLAKE2B_OUTBYTES)) {
        blake2b_invalidate_state(S);
        return -1;
    }

    /* Setup Parameter Block for unkeyed BLAKE2 */
    P.digest_length = (uint8_t)outlen;
    P.key_length = 0;
    P.fanout = 1;
    P.depth = 1;
    P.leaf_length = 0;
    P.node_offset = 0;
    P.node_depth = 0;
    P.inner_length = 0;
    memset(P.reserved, 0, sizeof(P.reserved));
    memset(P.salt, 0, sizeof(P.salt));
    memset(P.personal, 0, sizeof(P.personal));

    return blake2b_init_param(S, &P);
}

int blake2b_init_key(blake2b_state *S, size_t outlen, const void *key,
                     size_t keylen) {
    blake2b_param P;

    if (S == NULL) {
        return -1;
    }

    if ((outlen == 0) || (outlen > BLAKE2B_OUTBYTES)) {
        blake2b_invalidate_state(S);
        return -1;
    }

    if ((key == 0) || (keylen == 0) || (keylen > BLAKE2B_KEYBYTES)) {
        blake2b_invalidate_state(S);
        return -1;
    }

    /* Setup Parameter Block for keyed BLAKE2 */
    P.digest_length = (uint8_t)outlen;
    P.key_length = (uint8_t)keylen;
    P.fanout = 1;
    P.depth = 1;
    P.leaf_length = 0;
    P.node_offset = 0;
    P.node_depth = 0;
    P.inner_length = 0;
    memset(P.reserved, 0, sizeof(P.reserved));
    memset(P.salt, 0, sizeof(P.salt));
    memset(P.personal, 0, sizeof(P.personal));

    if (blake2b_init_param(S, &P) < 0) {
        blake2b_invalidate_state(S);
        return -1;
    }

    {
        uint8_t block[BLAKE2B_BLOCKBYTES];
        memset(block, 0, BLAKE2B_BLOCKBYTES);
        memcpy(block, key, keylen);
        blake2b_update(S, block, BLAKE2B_BLOCKBYTES);
        /* Burn the key from stack */
        clear_internal_memory(block, BLAKE2B_BLOCKBYTES);
    }
    return 0;
}

static void blake2b_compress(blake2b_state *S, const uint8_t *block) {
    uint64_t m[16];
    uint64_t v[16];
    unsigned int i, r;

    for (i = 0; i < 16; ++i) {
        m[i] = load64(block + i * sizeof(m[i]));
    }

    for (i = 0; i < 8; ++i) {
        v[i] = S->h[i];
    }

    v[8] = blake2b_IV[0];
    v[9] = blake2b_IV[1];
    v[10] = blake2b_IV[2];
    v[11] = blake2b_IV[3];
    v[12] = blake2b_IV[4] ^ S->t[0];
    v[13] = blake2b_IV[5] ^ S->t[1];
    v[14] = blake2b_IV[6] ^ S->f[0];
    v[15] = blake2b_IV[7] ^ S->f[1];

#define G(r, i, a, b, c, d)                                                    \
    do {                                                                       \
        a = a + b + m[blake2b_sigma[r][2 * i + 0]];                            \
        d = rotr64(d ^ a, 32);                                                 \
        c = c + d;                                                             \
        b = rotr64(b ^ c, 24);                                                 \
        a = a + b + m[blake2b_sigma[r][2 * i + 1]];                            \
        d = rotr64(d ^ a, 16);                                                 \
        c = c + d;                                                             \
        b = rotr64(b ^ c, 63);                                                 \
    } while ((void)0, 0)

#define ROUND(r)                                                               \
    do {                                                                       \
        G(r, 0, v[0], v[4], v[8], v[12]);                                      \
        G(r, 1, v[1], v[5], v[9], v[13]);                                      \
        G(r, 2, v[2], v[6], v[10], v[14]);                                     \
        G(r, 3, v[3], v[7], v[11], v[15]);                                     \
        G(r, 4, v[0], v[5], v[10], v[15]);                                     \
        G(r, 5, v[1], v[6], v[11], v[12]);                                     \
        G(r, 6, v[2], v[7], v[8], v[13]);                                      \
        G(r, 7, v[3], v[4], v[9], v[14]);                                      \
    } while ((void)0, 0)

    for (r = 0; r < 12; ++r) {
        ROUND(r);
    }

    for (i = 0; i < 8; ++i) {
        S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
    }

#undef G
#undef ROUND
}

int blake2b_update(blake2b_state *S, const void *in, size_t inlen) {
    const uint8_t *pin = (const uint8_t *)in;

    if (inlen == 0) {
        return 0;
    }

    /* Sanity check */
    if (S == NULL || in == NULL) {
        return -1;
    }

    /* Is this a reused state? */
    if (S->f[0] != 0) {
        return -1;
    }

    if (S->buflen + inlen > BLAKE2B_BLOCKBYTES) {
        /* Complete current block */
        size_t left = S->buflen;
        size_t fill = BLAKE2B_BLOCKBYTES - left;
        memcpy(&S->buf[left], pin, fill);
        blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
        blake2b_compress(S, S->buf);
        S->buflen = 0;
        inlen -= fill;
        pin += fill;
        /* Avoid buffer copies when possible */
        while (inlen > BLAKE2B_BLOCKBYTES) {
            blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
            blake2b_compress(S, pin);
            inlen -= BLAKE2B_BLOCKBYTES;
            pin += BLAKE2B_BLOCKBYTES;
        }
    }
    memcpy(&S->buf[S->buflen], pin, inlen);
    S->buflen += (unsigned int)inlen;
    return 0;
}

int blake2b_final(blake2b_state *S, void *out, size_t outlen) {
    uint8_t buffer[BLAKE2B_OUTBYTES] = {0};
    unsigned int i;

    /* Sanity checks */
    if (S == NULL || out == NULL || outlen < S->outlen) {
        return -1;
    }

    /* Is this a reused state? */
    if (S->f[0] != 0) {
        return -1;
    }

    blake2b_increment_counter(S, S->buflen);
    blake2b_set_lastblock(S);
    memset(&S->buf[S->buflen], 0, BLAKE2B_BLOCKBYTES - S->buflen); /* Padding */
    blake2b_compress(S, S->buf);

    for (i = 0; i < 8; ++i) { /* Output full hash to temp buffer */
        store64(buffer + sizeof(S->h[i]) * i, S->h[i]);
    }

    memcpy(out, buffer, S->outlen);
    clear_internal_memory(buffer, sizeof(buffer));
    clear_internal_memory(S->buf, sizeof(S->buf));
    clear_internal_memory(S->h, sizeof(S->h));
    return 0;
}

int blake2b(void *out, size_t outlen, const void *in, size_t inlen,
            const void *key, size_t keylen) {
    blake2b_state S;
    int ret = -1;

    /* Verify parameters */
    if (NULL == in && inlen > 0) {
        goto fail;
    }

    if (NULL == out || outlen == 0 || outlen > BLAKE2B_OUTBYTES) {
        goto fail;
    }

    if ((NULL == key && keylen > 0) || keylen > BLAKE2B_KEYBYTES) {
        goto fail;
    }

    if (keylen > 0) {
        if (blake2b_init_key(&S, outlen, key, keylen) < 0) {
            goto fail;
        }
    } else {
        if (blake2b_init(&S, outlen) < 0) {
            goto fail;
        }
    }

    if (blake2b_update(&S, in, inlen) < 0) {
        goto fail;
    }
    ret = blake2b_final(&S, out, outlen);

fail:
    clear_internal_memory(&S, sizeof(S));
    return ret;
}

/* Argon2 Team - Begin Code */
int blake2b_long(void *pout, size_t outlen, const void *in, size_t inlen) {
    uint8_t *out = (uint8_t *)pout;
    blake2b_state blake_state;
    uint8_t outlen_bytes[sizeof(uint32_t)] = {0};
    int ret = -1;

    if (outlen > UINT32_MAX) {
        goto fail;
    }

    /* Ensure little-endian byte order! */
    store32(outlen_bytes, (uint32_t)outlen);

#define TRY(statement)                                                         \
    do {                                                                       \
        ret = statement;                                                       \
        if (ret < 0) {                                                         \
            goto fail;                                                         \
        }                                                                      \
    } while ((void)0, 0)

    if (outlen <= BLAKE2B_OUTBYTES) {
        TRY(blake2b_init(&blake_state, outlen));
        TRY(blake2b_update(&blake_state, outlen_bytes, sizeof(outlen_bytes)));
        TRY(blake2b_update(&blake_state, in, inlen));
        TRY(blake2b_final(&blake_state, out, outlen));
    } else {
        uint32_t toproduce;
        uint8_t out_buffer[BLAKE2B_OUTBYTES];
        uint8_t in_buffer[BLAKE2B_OUTBYTES];
        TRY(blake2b_init(&blake_state, BLAKE2B_OUTBYTES));
        TRY(blake2b_update(&blake_state, outlen_bytes, sizeof(outlen_bytes)));
        TRY(blake2b_update(&blake_state, in, inlen));
        TRY(blake2b_final(&blake_state, out_buffer, BLAKE2B_OUTBYTES));
        memcpy(out, out_buffer, BLAKE2B_OUTBYTES / 2);
        out += BLAKE2B_OUTBYTES / 2;
        toproduce = (uint32_t)outlen - BLAKE2B_OUTBYTES / 2;

        while (toproduce > BLAKE2B_OUTBYTES) {
            memcpy(in_buffer, out_buffer, BLAKE2B_OUTBYTES);
            TRY(blake2b(out_buffer, BLAKE2B_OUTBYTES, in_buffer,
                        BLAKE2B_OUTBYTES, NULL, 0));
            memcpy(out, out_buffer, BLAKE2B_OUTBYTES / 2);
            out += BLAKE2B_OUTBYTES / 2;
            toproduce -= BLAKE2B_OUTBYTES / 2;
        }

        memcpy(in_buffer, out_buffer, BLAKE2B_OUTBYTES);
        TRY(blake2b(out_buffer, toproduce, in_buffer, BLAKE2B_OUTBYTES, NULL,
                    0));
        memcpy(out, out_buffer, toproduce);
    }
fail:
    clear_internal_memory(&blake_state, sizeof(blake_state));
    return ret;
#undef TRY
}
/* Argon2 Team - End Code */








Added build/argon2/src/blamka-round-ref.h version [20d8f57b67].




























































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#ifndef BLAKE_ROUND_MKA_H
#define BLAKE_ROUND_MKA_H

#include "blake2.h"
#include "blake2-impl.h"

/* designed by the Lyra PHC team */
static BLAKE2_INLINE uint64_t fBlaMka(uint64_t x, uint64_t y) {
    const uint64_t m = UINT64_C(0xFFFFFFFF);
    const uint64_t xy = (x & m) * (y & m);
    return x + y + 2 * xy;
}

#define G(a, b, c, d)                                                          \
    do {                                                                       \
        a = fBlaMka(a, b);                                                     \
        d = rotr64(d ^ a, 32);                                                 \
        c = fBlaMka(c, d);                                                     \
        b = rotr64(b ^ c, 24);                                                 \
        a = fBlaMka(a, b);                                                     \
        d = rotr64(d ^ a, 16);                                                 \
        c = fBlaMka(c, d);                                                     \
        b = rotr64(b ^ c, 63);                                                 \
    } while ((void)0, 0)

#define BLAKE2_ROUND_NOMSG(v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11,   \
                           v12, v13, v14, v15)                                 \
    do {                                                                       \
        G(v0, v4, v8, v12);                                                    \
        G(v1, v5, v9, v13);                                                    \
        G(v2, v6, v10, v14);                                                   \
        G(v3, v7, v11, v15);                                                   \
        G(v0, v5, v10, v15);                                                   \
        G(v1, v6, v11, v12);                                                   \
        G(v2, v7, v8, v13);                                                    \
        G(v3, v4, v9, v14);                                                    \
    } while ((void)0, 0)

#endif








Added build/argon2/src/core.c version [9358844f3b].






























































































































































































































































































































































































































































































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

/*For memory wiping*/
#ifdef _MSC_VER
#include <windows.h>
#include <winbase.h> /* For SecureZeroMemory */
#endif
#if defined __STDC_LIB_EXT1__
#define __STDC_WANT_LIB_EXT1__ 1
#endif
#define VC_GE_2005(version) (version >= 1400)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "core.h"
#include "thread.h"
#include "blake2/blake2.h"
#include "blake2/blake2-impl.h"

#ifdef GENKAT
#include "genkat.h"
#endif

#if defined(__clang__)
#if __has_attribute(optnone)
#define NOT_OPTIMIZED __attribute__((optnone))
#endif
#elif defined(__GNUC__)
#define GCC_VERSION                                                            \
    (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
#if GCC_VERSION >= 40400
#define NOT_OPTIMIZED __attribute__((optimize("O0")))
#endif
#endif
#ifndef NOT_OPTIMIZED
#define NOT_OPTIMIZED
#endif

/***************Instance and Position constructors**********/
void init_block_value(block *b, uint8_t in) { memset(b->v, in, sizeof(b->v)); }

void copy_block(block *dst, const block *src) {
    memcpy(dst->v, src->v, sizeof(uint64_t) * ARGON2_QWORDS_IN_BLOCK);
}

void xor_block(block *dst, const block *src) {
    int i;
    for (i = 0; i < ARGON2_QWORDS_IN_BLOCK; ++i) {
        dst->v[i] ^= src->v[i];
    }
}

static void load_block(block *dst, const void *input) {
    unsigned i;
    for (i = 0; i < ARGON2_QWORDS_IN_BLOCK; ++i) {
        dst->v[i] = load64((const uint8_t *)input + i * sizeof(dst->v[i]));
    }
}

static void store_block(void *output, const block *src) {
    unsigned i;
    for (i = 0; i < ARGON2_QWORDS_IN_BLOCK; ++i) {
        store64((uint8_t *)output + i * sizeof(src->v[i]), src->v[i]);
    }
}

/***************Memory functions*****************/

int allocate_memory(const argon2_context *context, uint8_t **memory,
                    size_t num, size_t size) {
    size_t memory_size = num*size;
    if (memory == NULL) {
        return ARGON2_MEMORY_ALLOCATION_ERROR;
    }

    /* 1. Check for multiplication overflow */
    if (size != 0 && memory_size / size != num) {
        return ARGON2_MEMORY_ALLOCATION_ERROR;
    }

    /* 2. Try to allocate with appropriate allocator */
    if (context->allocate_cbk) {
        (context->allocate_cbk)(memory, memory_size);
    } else {
        *memory = malloc(memory_size);
    }

    if (*memory == NULL) {
        return ARGON2_MEMORY_ALLOCATION_ERROR;
    }

    return ARGON2_OK;
}

void free_memory(const argon2_context *context, uint8_t *memory,
                 size_t num, size_t size) {
    size_t memory_size = num*size;
    clear_internal_memory(memory, memory_size);
    if (context->free_cbk) {
        (context->free_cbk)(memory, memory_size);
    } else {
        free(memory);
    }
}

void NOT_OPTIMIZED secure_wipe_memory(void *v, size_t n) {
#if defined(_MSC_VER) && VC_GE_2005(_MSC_VER)
    SecureZeroMemory(v, n);
#elif defined memset_s
    memset_s(v, n, 0, n);
#elif defined(__OpenBSD__)
    explicit_bzero(v, n);
#else
    static void *(*const volatile memset_sec)(void *, int, size_t) = &memset;
    memset_sec(v, 0, n);
#endif
}

/* Memory clear flag defaults to true. */
int FLAG_clear_internal_memory = 1;
void clear_internal_memory(void *v, size_t n) {
  if (FLAG_clear_internal_memory && v) {
    secure_wipe_memory(v, n);
  }
}

void finalize(const argon2_context *context, argon2_instance_t *instance) {
    if (context != NULL && instance != NULL) {
        block blockhash;
        uint32_t l;

        copy_block(&blockhash, instance->memory + instance->lane_length - 1);

        /* XOR the last blocks */
        for (l = 1; l < instance->lanes; ++l) {
            uint32_t last_block_in_lane =
                l * instance->lane_length + (instance->lane_length - 1);
            xor_block(&blockhash, instance->memory + last_block_in_lane);
        }

        /* Hash the result */
        {
            uint8_t blockhash_bytes[ARGON2_BLOCK_SIZE];
            store_block(blockhash_bytes, &blockhash);
            blake2b_long(context->out, context->outlen, blockhash_bytes,
                         ARGON2_BLOCK_SIZE);
            /* clear blockhash and blockhash_bytes */
            clear_internal_memory(blockhash.v, ARGON2_BLOCK_SIZE);
            clear_internal_memory(blockhash_bytes, ARGON2_BLOCK_SIZE);
        }

#ifdef GENKAT
        print_tag(context->out, context->outlen);
#endif

        free_memory(context, (uint8_t *)instance->memory,
                    instance->memory_blocks, sizeof(block));
    }
}

uint32_t index_alpha(const argon2_instance_t *instance,
                     const argon2_position_t *position, uint32_t pseudo_rand,
                     int same_lane) {
    /*
     * Pass 0:
     *      This lane : all already finished segments plus already constructed
     * blocks in this segment
     *      Other lanes : all already finished segments
     * Pass 1+:
     *      This lane : (SYNC_POINTS - 1) last segments plus already constructed
     * blocks in this segment
     *      Other lanes : (SYNC_POINTS - 1) last segments
     */
    uint32_t reference_area_size;
    uint64_t relative_position;
    uint32_t start_position, absolute_position;

    if (0 == position->pass) {
        /* First pass */
        if (0 == position->slice) {
            /* First slice */
            reference_area_size =
                position->index - 1; /* all but the previous */
        } else {
            if (same_lane) {
                /* The same lane => add current segment */
                reference_area_size =
                    position->slice * instance->segment_length +
                    position->index - 1;
            } else {
                reference_area_size =
                    position->slice * instance->segment_length +
                    ((position->index == 0) ? (-1) : 0);
            }
        }
    } else {
        /* Second pass */
        if (same_lane) {
            reference_area_size = instance->lane_length -
                                  instance->segment_length + position->index -
                                  1;
        } else {
            reference_area_size = instance->lane_length -
                                  instance->segment_length +
                                  ((position->index == 0) ? (-1) : 0);
        }
    }

    /* 1.2.4. Mapping pseudo_rand to 0..<reference_area_size-1> and produce
     * relative position */
    relative_position = pseudo_rand;
    relative_position = relative_position * relative_position >> 32;
    relative_position = reference_area_size - 1 -
                        (reference_area_size * relative_position >> 32);

    /* 1.2.5 Computing starting position */
    start_position = 0;

    if (0 != position->pass) {
        start_position = (position->slice == ARGON2_SYNC_POINTS - 1)
                             ? 0
                             : (position->slice + 1) * instance->segment_length;
    }

    /* 1.2.6. Computing absolute position */
    absolute_position = (start_position + relative_position) %
                        instance->lane_length; /* absolute position */
    return absolute_position;
}

/* Single-threaded version for p=1 case */
static int fill_memory_blocks_st(argon2_instance_t *instance) {
    uint32_t r, s, l;

    for (r = 0; r < instance->passes; ++r) {
        for (s = 0; s < ARGON2_SYNC_POINTS; ++s) {
            for (l = 0; l < instance->lanes; ++l) {
                argon2_position_t position = {r, l, (uint8_t)s, 0};
                fill_segment(instance, position);
            }
        }
#ifdef GENKAT
        internal_kat(instance, r); /* Print all memory blocks */
#endif
    }
    return ARGON2_OK;
}

#if !defined(ARGON2_NO_THREADS)

#ifdef _WIN32
static unsigned __stdcall fill_segment_thr(void *thread_data)
#else
static void *fill_segment_thr(void *thread_data)
#endif
{
    argon2_thread_data *my_data = thread_data;
    fill_segment(my_data->instance_ptr, my_data->pos);
    argon2_thread_exit();
    return 0;
}

/* Multi-threaded version for p > 1 case */
static int fill_memory_blocks_mt(argon2_instance_t *instance) {
    uint32_t r, s;
    argon2_thread_handle_t *thread = NULL;
    argon2_thread_data *thr_data = NULL;
    int rc = ARGON2_OK;

    /* 1. Allocating space for threads */
    thread = calloc(instance->lanes, sizeof(argon2_thread_handle_t));
    if (thread == NULL) {
        rc = ARGON2_MEMORY_ALLOCATION_ERROR;
        goto fail;
    }

    thr_data = calloc(instance->lanes, sizeof(argon2_thread_data));
    if (thr_data == NULL) {
        rc = ARGON2_MEMORY_ALLOCATION_ERROR;
        goto fail;
    }

    for (r = 0; r < instance->passes; ++r) {
        for (s = 0; s < ARGON2_SYNC_POINTS; ++s) {
            uint32_t l;

            /* 2. Calling threads */
            for (l = 0; l < instance->lanes; ++l) {
                argon2_position_t position;

                /* 2.1 Join a thread if limit is exceeded */
                if (l >= instance->threads) {
                    if (argon2_thread_join(thread[l - instance->threads])) {
                        rc = ARGON2_THREAD_FAIL;
                        goto fail;
                    }
                }

                /* 2.2 Create thread */
                position.pass = r;
                position.lane = l;
                position.slice = (uint8_t)s;
                position.index = 0;
                thr_data[l].instance_ptr =
                    instance; /* preparing the thread input */
                memcpy(&(thr_data[l].pos), &position,
                       sizeof(argon2_position_t));
                if (argon2_thread_create(&thread[l], &fill_segment_thr,
                                         (void *)&thr_data[l])) {
                    rc = ARGON2_THREAD_FAIL;
                    goto fail;
                }

                /* fill_segment(instance, position); */
                /*Non-thread equivalent of the lines above */
            }

            /* 3. Joining remaining threads */
            for (l = instance->lanes - instance->threads; l < instance->lanes;
                 ++l) {
                if (argon2_thread_join(thread[l])) {
                    rc = ARGON2_THREAD_FAIL;
                    goto fail;
                }
            }
        }

#ifdef GENKAT
        internal_kat(instance, r); /* Print all memory blocks */
#endif
    }

fail:
    if (thread != NULL) {
        free(thread);
    }
    if (thr_data != NULL) {
        free(thr_data);
    }
    return rc;
}

#endif /* ARGON2_NO_THREADS */

int fill_memory_blocks(argon2_instance_t *instance) {
	if (instance == NULL || instance->lanes == 0) {
	    return ARGON2_INCORRECT_PARAMETER;
    }
#if defined(ARGON2_NO_THREADS)
    return fill_memory_blocks_st(instance);
#else
    return instance->threads == 1 ?
			fill_memory_blocks_st(instance) : fill_memory_blocks_mt(instance);
#endif
}

int validate_inputs(const argon2_context *context) {
    if (NULL == context) {
        return ARGON2_INCORRECT_PARAMETER;
    }

    if (NULL == context->out) {
        return ARGON2_OUTPUT_PTR_NULL;
    }

    /* Validate output length */
    if (ARGON2_MIN_OUTLEN > context->outlen) {
        return ARGON2_OUTPUT_TOO_SHORT;
    }

    if (ARGON2_MAX_OUTLEN < context->outlen) {
        return ARGON2_OUTPUT_TOO_LONG;
    }

    /* Validate password (required param) */
    if (NULL == context->pwd) {
        if (0 != context->pwdlen) {
            return ARGON2_PWD_PTR_MISMATCH;
        }
    }

    if (ARGON2_MIN_PWD_LENGTH > context->pwdlen) {
      return ARGON2_PWD_TOO_SHORT;
    }

    if (ARGON2_MAX_PWD_LENGTH < context->pwdlen) {
        return ARGON2_PWD_TOO_LONG;
    }

    /* Validate salt (required param) */
    if (NULL == context->salt) {
        if (0 != context->saltlen) {
            return ARGON2_SALT_PTR_MISMATCH;
        }
    }

    if (ARGON2_MIN_SALT_LENGTH > context->saltlen) {
        return ARGON2_SALT_TOO_SHORT;
    }

    if (ARGON2_MAX_SALT_LENGTH < context->saltlen) {
        return ARGON2_SALT_TOO_LONG;
    }

    /* Validate secret (optional param) */
    if (NULL == context->secret) {
        if (0 != context->secretlen) {
            return ARGON2_SECRET_PTR_MISMATCH;
        }
    } else {
        if (ARGON2_MIN_SECRET > context->secretlen) {
            return ARGON2_SECRET_TOO_SHORT;
        }
        if (ARGON2_MAX_SECRET < context->secretlen) {
            return ARGON2_SECRET_TOO_LONG;
        }
    }

    /* Validate associated data (optional param) */
    if (NULL == context->ad) {
        if (0 != context->adlen) {
            return ARGON2_AD_PTR_MISMATCH;
        }
    } else {
        if (ARGON2_MIN_AD_LENGTH > context->adlen) {
            return ARGON2_AD_TOO_SHORT;
        }
        if (ARGON2_MAX_AD_LENGTH < context->adlen) {
            return ARGON2_AD_TOO_LONG;
        }
    }

    /* Validate memory cost */
    if (ARGON2_MIN_MEMORY > context->m_cost) {
        return ARGON2_MEMORY_TOO_LITTLE;
    }

    if (ARGON2_MAX_MEMORY < context->m_cost) {
        return ARGON2_MEMORY_TOO_MUCH;
    }

    if (context->m_cost < 8 * context->lanes) {
        return ARGON2_MEMORY_TOO_LITTLE;
    }

    /* Validate time cost */
    if (ARGON2_MIN_TIME > context->t_cost) {
        return ARGON2_TIME_TOO_SMALL;
    }

    if (ARGON2_MAX_TIME < context->t_cost) {
        return ARGON2_TIME_TOO_LARGE;
    }

    /* Validate lanes */
    if (ARGON2_MIN_LANES > context->lanes) {
        return ARGON2_LANES_TOO_FEW;
    }

    if (ARGON2_MAX_LANES < context->lanes) {
        return ARGON2_LANES_TOO_MANY;
    }

    /* Validate threads */
    if (ARGON2_MIN_THREADS > context->threads) {
        return ARGON2_THREADS_TOO_FEW;
    }

    if (ARGON2_MAX_THREADS < context->threads) {
        return ARGON2_THREADS_TOO_MANY;
    }

    if (NULL != context->allocate_cbk && NULL == context->free_cbk) {
        return ARGON2_FREE_MEMORY_CBK_NULL;
    }

    if (NULL == context->allocate_cbk && NULL != context->free_cbk) {
        return ARGON2_ALLOCATE_MEMORY_CBK_NULL;
    }

    return ARGON2_OK;
}

void fill_first_blocks(uint8_t *blockhash, const argon2_instance_t *instance) {
    uint32_t l;
    /* Make the first and second block in each lane as G(H0||0||i) or
       G(H0||1||i) */
    uint8_t blockhash_bytes[ARGON2_BLOCK_SIZE];
    for (l = 0; l < instance->lanes; ++l) {

        store32(blockhash + ARGON2_PREHASH_DIGEST_LENGTH, 0);
        store32(blockhash + ARGON2_PREHASH_DIGEST_LENGTH + 4, l);
        blake2b_long(blockhash_bytes, ARGON2_BLOCK_SIZE, blockhash,
                     ARGON2_PREHASH_SEED_LENGTH);
        load_block(&instance->memory[l * instance->lane_length + 0],
                   blockhash_bytes);

        store32(blockhash + ARGON2_PREHASH_DIGEST_LENGTH, 1);
        blake2b_long(blockhash_bytes, ARGON2_BLOCK_SIZE, blockhash,
                     ARGON2_PREHASH_SEED_LENGTH);
        load_block(&instance->memory[l * instance->lane_length + 1],
                   blockhash_bytes);
    }
    clear_internal_memory(blockhash_bytes, ARGON2_BLOCK_SIZE);
}

void initial_hash(uint8_t *blockhash, argon2_context *context,
                  argon2_type type) {
    blake2b_state BlakeHash;
    uint8_t value[sizeof(uint32_t)];

    if (NULL == context || NULL == blockhash) {
        return;
    }

    blake2b_init(&BlakeHash, ARGON2_PREHASH_DIGEST_LENGTH);

    store32(&value, context->lanes);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    store32(&value, context->outlen);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    store32(&value, context->m_cost);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    store32(&value, context->t_cost);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    store32(&value, context->version);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    store32(&value, (uint32_t)type);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    store32(&value, context->pwdlen);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    if (context->pwd != NULL) {
        blake2b_update(&BlakeHash, (const uint8_t *)context->pwd,
                       context->pwdlen);

        if (context->flags & ARGON2_FLAG_CLEAR_PASSWORD) {
            secure_wipe_memory(context->pwd, context->pwdlen);
            context->pwdlen = 0;
        }
    }

    store32(&value, context->saltlen);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    if (context->salt != NULL) {
        blake2b_update(&BlakeHash, (const uint8_t *)context->salt,
                       context->saltlen);
    }

    store32(&value, context->secretlen);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    if (context->secret != NULL) {
        blake2b_update(&BlakeHash, (const uint8_t *)context->secret,
                       context->secretlen);

        if (context->flags & ARGON2_FLAG_CLEAR_SECRET) {
            secure_wipe_memory(context->secret, context->secretlen);
            context->secretlen = 0;
        }
    }

    store32(&value, context->adlen);
    blake2b_update(&BlakeHash, (const uint8_t *)&value, sizeof(value));

    if (context->ad != NULL) {
        blake2b_update(&BlakeHash, (const uint8_t *)context->ad,
                       context->adlen);
    }

    blake2b_final(&BlakeHash, blockhash, ARGON2_PREHASH_DIGEST_LENGTH);
}

int initialize(argon2_instance_t *instance, argon2_context *context) {
    uint8_t blockhash[ARGON2_PREHASH_SEED_LENGTH];
    int result = ARGON2_OK;

    if (instance == NULL || context == NULL)
        return ARGON2_INCORRECT_PARAMETER;
    instance->context_ptr = context;

    /* 1. Memory allocation */
    result = allocate_memory(context, (uint8_t **)&(instance->memory),
                             instance->memory_blocks, sizeof(block));
    if (result != ARGON2_OK) {
        return result;
    }

    /* 2. Initial hashing */
    /* H_0 + 8 extra bytes to produce the first blocks */
    /* uint8_t blockhash[ARGON2_PREHASH_SEED_LENGTH]; */
    /* Hashing all inputs */
    initial_hash(blockhash, context, instance->type);
    /* Zeroing 8 extra bytes */
    clear_internal_memory(blockhash + ARGON2_PREHASH_DIGEST_LENGTH,
                          ARGON2_PREHASH_SEED_LENGTH -
                              ARGON2_PREHASH_DIGEST_LENGTH);

#ifdef GENKAT
    initial_kat(blockhash, context, instance->type);
#endif

    /* 3. Creating first blocks, we always have at least two blocks in a slice
     */
    fill_first_blocks(blockhash, instance);
    /* Clearing the hash */
    clear_internal_memory(blockhash, ARGON2_PREHASH_SEED_LENGTH);

    return ARGON2_OK;
}








Added build/argon2/src/core.h version [a78495db9e].








































































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#ifndef ARGON2_CORE_H
#define ARGON2_CORE_H

#include "argon2.h"

#define CONST_CAST(x) (x)(uintptr_t)

/**********************Argon2 internal constants*******************************/

enum argon2_core_constants {
    /* Memory block size in bytes */
    ARGON2_BLOCK_SIZE = 1024,
    ARGON2_QWORDS_IN_BLOCK = ARGON2_BLOCK_SIZE / 8,
    ARGON2_OWORDS_IN_BLOCK = ARGON2_BLOCK_SIZE / 16,
    ARGON2_HWORDS_IN_BLOCK = ARGON2_BLOCK_SIZE / 32,
    ARGON2_512BIT_WORDS_IN_BLOCK = ARGON2_BLOCK_SIZE / 64,

    /* Number of pseudo-random values generated by one call to Blake in Argon2i
       to
       generate reference block positions */
    ARGON2_ADDRESSES_IN_BLOCK = 128,

    /* Pre-hashing digest length and its extension*/
    ARGON2_PREHASH_DIGEST_LENGTH = 64,
    ARGON2_PREHASH_SEED_LENGTH = 72
};

/*************************Argon2 internal data types***********************/

/*
 * Structure for the (1KB) memory block implemented as 128 64-bit words.
 * Memory blocks can be copied, XORed. Internal words can be accessed by [] (no
 * bounds checking).
 */
typedef struct block_ { uint64_t v[ARGON2_QWORDS_IN_BLOCK]; } block;

/*****************Functions that work with the block******************/

/* Initialize each byte of the block with @in */
void init_block_value(block *b, uint8_t in);

/* Copy block @src to block @dst */
void copy_block(block *dst, const block *src);

/* XOR @src onto @dst bytewise */
void xor_block(block *dst, const block *src);

/*
 * Argon2 instance: memory pointer, number of passes, amount of memory, type,
 * and derived values.
 * Used to evaluate the number and location of blocks to construct in each
 * thread
 */
typedef struct Argon2_instance_t {
    block *memory;          /* Memory pointer */
    uint32_t version;
    uint32_t passes;        /* Number of passes */
    uint32_t memory_blocks; /* Number of blocks in memory */
    uint32_t segment_length;
    uint32_t lane_length;
    uint32_t lanes;
    uint32_t threads;
    argon2_type type;
    int print_internals; /* whether to print the memory blocks */
    argon2_context *context_ptr; /* points back to original context */
} argon2_instance_t;

/*
 * Argon2 position: where we construct the block right now. Used to distribute
 * work between threads.
 */
typedef struct Argon2_position_t {
    uint32_t pass;
    uint32_t lane;
    uint8_t slice;
    uint32_t index;
} argon2_position_t;

/*Struct that holds the inputs for thread handling FillSegment*/
typedef struct Argon2_thread_data {
    argon2_instance_t *instance_ptr;
    argon2_position_t pos;
} argon2_thread_data;

/*************************Argon2 core functions********************************/

/* Allocates memory to the given pointer, uses the appropriate allocator as
 * specified in the context. Total allocated memory is num*size.
 * @param context argon2_context which specifies the allocator
 * @param memory pointer to the pointer to the memory
 * @param size the size in bytes for each element to be allocated
 * @param num the number of elements to be allocated
 * @return ARGON2_OK if @memory is a valid pointer and memory is allocated
 */
int allocate_memory(const argon2_context *context, uint8_t **memory,
                    size_t num, size_t size);

/*
 * Frees memory at the given pointer, uses the appropriate deallocator as
 * specified in the context. Also cleans the memory using clear_internal_memory.
 * @param context argon2_context which specifies the deallocator
 * @param memory pointer to buffer to be freed
 * @param size the size in bytes for each element to be deallocated
 * @param num the number of elements to be deallocated
 */
void free_memory(const argon2_context *context, uint8_t *memory,
                 size_t num, size_t size);

/* Function that securely cleans the memory. This ignores any flags set
 * regarding clearing memory. Usually one just calls clear_internal_memory.
 * @param mem Pointer to the memory
 * @param s Memory size in bytes
 */
void secure_wipe_memory(void *v, size_t n);

/* Function that securely clears the memory if FLAG_clear_internal_memory is
 * set. If the flag isn't set, this function does nothing.
 * @param mem Pointer to the memory
 * @param s Memory size in bytes
 */
void clear_internal_memory(void *v, size_t n);

/*
 * Computes absolute position of reference block in the lane following a skewed
 * distribution and using a pseudo-random value as input
 * @param instance Pointer to the current instance
 * @param position Pointer to the current position
 * @param pseudo_rand 32-bit pseudo-random value used to determine the position
 * @param same_lane Indicates if the block will be taken from the current lane.
 * If so we can reference the current segment
 * @pre All pointers must be valid
 */
uint32_t index_alpha(const argon2_instance_t *instance,
                     const argon2_position_t *position, uint32_t pseudo_rand,
                     int same_lane);

/*
 * Function that validates all inputs against predefined restrictions and return
 * an error code
 * @param context Pointer to current Argon2 context
 * @return ARGON2_OK if everything is all right, otherwise one of error codes
 * (all defined in <argon2.h>
 */
int validate_inputs(const argon2_context *context);

/*
 * Hashes all the inputs into @a blockhash[PREHASH_DIGEST_LENGTH], clears
 * password and secret if needed
 * @param  context  Pointer to the Argon2 internal structure containing memory
 * pointer, and parameters for time and space requirements.
 * @param  blockhash Buffer for pre-hashing digest
 * @param  type Argon2 type
 * @pre    @a blockhash must have at least @a PREHASH_DIGEST_LENGTH bytes
 * allocated
 */
void initial_hash(uint8_t *blockhash, argon2_context *context,
                  argon2_type type);

/*
 * Function creates first 2 blocks per lane
 * @param instance Pointer to the current instance
 * @param blockhash Pointer to the pre-hashing digest
 * @pre blockhash must point to @a PREHASH_SEED_LENGTH allocated values
 */
void fill_first_blocks(uint8_t *blockhash, const argon2_instance_t *instance);

/*
 * Function allocates memory, hashes the inputs with Blake,  and creates first
 * two blocks. Returns the pointer to the main memory with 2 blocks per lane
 * initialized
 * @param  context  Pointer to the Argon2 internal structure containing memory
 * pointer, and parameters for time and space requirements.
 * @param  instance Current Argon2 instance
 * @return Zero if successful, -1 if memory failed to allocate. @context->state
 * will be modified if successful.
 */
int initialize(argon2_instance_t *instance, argon2_context *context);

/*
 * XORing the last block of each lane, hashing it, making the tag. Deallocates
 * the memory.
 * @param context Pointer to current Argon2 context (use only the out parameters
 * from it)
 * @param instance Pointer to current instance of Argon2
 * @pre instance->state must point to necessary amount of memory
 * @pre context->out must point to outlen bytes of memory
 * @pre if context->free_cbk is not NULL, it should point to a function that
 * deallocates memory
 */
void finalize(const argon2_context *context, argon2_instance_t *instance);

/*
 * Function that fills the segment using previous segments also from other
 * threads
 * @param context current context
 * @param instance Pointer to the current instance
 * @param position Current position
 * @pre all block pointers must be valid
 */
void fill_segment(const argon2_instance_t *instance,
                  argon2_position_t position);

/*
 * Function that fills the entire memory t_cost times based on the first two
 * blocks in each lane
 * @param instance Pointer to the current instance
 * @return ARGON2_OK if successful, @context->state
 */
int fill_memory_blocks(argon2_instance_t *instance);

#endif








Added build/argon2/src/encoding.c version [0ca1845e0f].



















































































































































































































































































































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "encoding.h"
#include "core.h"

/*
 * Example code for a decoder and encoder of "hash strings", with Argon2
 * parameters.
 *
 * This code comprises three sections:
 *
 *   -- The first section contains generic Base64 encoding and decoding
 *   functions. It is conceptually applicable to any hash function
 *   implementation that uses Base64 to encode and decode parameters,
 *   salts and outputs. It could be made into a library, provided that
 *   the relevant functions are made public (non-static) and be given
 *   reasonable names to avoid collisions with other functions.
 *
 *   -- The second section is specific to Argon2. It encodes and decodes
 *   the parameters, salts and outputs. It does not compute the hash
 *   itself.
 *
 * The code was originally written by Thomas Pornin <pornin@bolet.org>,
 * to whom comments and remarks may be sent. It is released under what
 * should amount to Public Domain or its closest equivalent; the
 * following mantra is supposed to incarnate that fact with all the
 * proper legal rituals:
 *
 * ---------------------------------------------------------------------
 * This file is provided under the terms of Creative Commons CC0 1.0
 * Public Domain Dedication. To the extent possible under law, the
 * author (Thomas Pornin) has waived all copyright and related or
 * neighboring rights to this file. This work is published from: Canada.
 * ---------------------------------------------------------------------
 *
 * Copyright (c) 2015 Thomas Pornin
 */

/* ==================================================================== */
/*
 * Common code; could be shared between different hash functions.
 *
 * Note: the Base64 functions below assume that uppercase letters (resp.
 * lowercase letters) have consecutive numerical codes, that fit on 8
 * bits. All modern systems use ASCII-compatible charsets, where these
 * properties are true. If you are stuck with a dinosaur of a system
 * that still defaults to EBCDIC then you already have much bigger
 * interoperability issues to deal with.
 */

/*
 * Some macros for constant-time comparisons. These work over values in
 * the 0..255 range. Returned value is 0x00 on "false", 0xFF on "true".
 */
#define EQ(x, y) ((((0U - ((unsigned)(x) ^ (unsigned)(y))) >> 8) & 0xFF) ^ 0xFF)
#define GT(x, y) ((((unsigned)(y) - (unsigned)(x)) >> 8) & 0xFF)
#define GE(x, y) (GT(y, x) ^ 0xFF)
#define LT(x, y) GT(y, x)
#define LE(x, y) GE(y, x)

/*
 * Convert value x (0..63) to corresponding Base64 character.
 */
static int b64_byte_to_char(unsigned x) {
    return (LT(x, 26) & (x + 'A')) |
           (GE(x, 26) & LT(x, 52) & (x + ('a' - 26))) |
           (GE(x, 52) & LT(x, 62) & (x + ('0' - 52))) | (EQ(x, 62) & '+') |
           (EQ(x, 63) & '/');
}

/*
 * Convert character c to the corresponding 6-bit value. If character c
 * is not a Base64 character, then 0xFF (255) is returned.
 */
static unsigned b64_char_to_byte(int c) {
    unsigned x;

    x = (GE(c, 'A') & LE(c, 'Z') & (c - 'A')) |
        (GE(c, 'a') & LE(c, 'z') & (c - ('a' - 26))) |
        (GE(c, '0') & LE(c, '9') & (c - ('0' - 52))) | (EQ(c, '+') & 62) |
        (EQ(c, '/') & 63);
    return x | (EQ(x, 0) & (EQ(c, 'A') ^ 0xFF));
}

/*
 * Convert some bytes to Base64. 'dst_len' is the length (in characters)
 * of the output buffer 'dst'; if that buffer is not large enough to
 * receive the result (including the terminating 0), then (size_t)-1
 * is returned. Otherwise, the zero-terminated Base64 string is written
 * in the buffer, and the output length (counted WITHOUT the terminating
 * zero) is returned.
 */
static size_t to_base64(char *dst, size_t dst_len, const void *src,
                        size_t src_len) {
    size_t olen;
    const unsigned char *buf;
    unsigned acc, acc_len;

    olen = (src_len / 3) << 2;
    switch (src_len % 3) {
    case 2:
        olen++;
    /* fall through */
    case 1:
        olen += 2;
        break;
    }
    if (dst_len <= olen) {
        return (size_t)-1;
    }
    acc = 0;
    acc_len = 0;
    buf = (const unsigned char *)src;
    while (src_len-- > 0) {
        acc = (acc << 8) + (*buf++);
        acc_len += 8;
        while (acc_len >= 6) {
            acc_len -= 6;
            *dst++ = (char)b64_byte_to_char((acc >> acc_len) & 0x3F);
        }
    }
    if (acc_len > 0) {
        *dst++ = (char)b64_byte_to_char((acc << (6 - acc_len)) & 0x3F);
    }
    *dst++ = 0;
    return olen;
}

/*
 * Decode Base64 chars into bytes. The '*dst_len' value must initially
 * contain the length of the output buffer '*dst'; when the decoding
 * ends, the actual number of decoded bytes is written back in
 * '*dst_len'.
 *
 * Decoding stops when a non-Base64 character is encountered, or when
 * the output buffer capacity is exceeded. If an error occurred (output
 * buffer is too small, invalid last characters leading to unprocessed
 * buffered bits), then NULL is returned; otherwise, the returned value
 * points to the first non-Base64 character in the source stream, which
 * may be the terminating zero.
 */
static const char *from_base64(void *dst, size_t *dst_len, const char *src) {
    size_t len;
    unsigned char *buf;
    unsigned acc, acc_len;

    buf = (unsigned char *)dst;
    len = 0;
    acc = 0;
    acc_len = 0;
    for (;;) {
        unsigned d;

        d = b64_char_to_byte(*src);
        if (d == 0xFF) {
            break;
        }
        src++;
        acc = (acc << 6) + d;
        acc_len += 6;
        if (acc_len >= 8) {
            acc_len -= 8;
            if ((len++) >= *dst_len) {
                return NULL;
            }
            *buf++ = (acc >> acc_len) & 0xFF;
        }
    }

    /*
     * If the input length is equal to 1 modulo 4 (which is
     * invalid), then there will remain 6 unprocessed bits;
     * otherwise, only 0, 2 or 4 bits are buffered. The buffered
     * bits must also all be zero.
     */
    if (acc_len > 4 || (acc & (((unsigned)1 << acc_len) - 1)) != 0) {
        return NULL;
    }
    *dst_len = len;
    return src;
}

/*
 * Decode decimal integer from 'str'; the value is written in '*v'.
 * Returned value is a pointer to the next non-decimal character in the
 * string. If there is no digit at all, or the value encoding is not
 * minimal (extra leading zeros), or the value does not fit in an
 * 'unsigned long', then NULL is returned.
 */
static const char *decode_decimal(const char *str, unsigned long *v) {
    const char *orig;
    unsigned long acc;

    acc = 0;
    for (orig = str;; str++) {
        int c;

        c = *str;
        if (c < '0' || c > '9') {
            break;
        }
        c -= '0';
        if (acc > (ULONG_MAX / 10)) {
            return NULL;
        }
        acc *= 10;
        if ((unsigned long)c > (ULONG_MAX - acc)) {
            return NULL;
        }
        acc += (unsigned long)c;
    }
    if (str == orig || (*orig == '0' && str != (orig + 1))) {
        return NULL;
    }
    *v = acc;
    return str;
}

/* ==================================================================== */
/*
 * Code specific to Argon2.
 *
 * The code below applies the following format:
 *
 *  $argon2<T>[$v=<num>]$m=<num>,t=<num>,p=<num>$<bin>$<bin>
 *
 * where <T> is either 'd', 'id', or 'i', <num> is a decimal integer (positive,
 * fits in an 'unsigned long'), and <bin> is Base64-encoded data (no '=' padding
 * characters, no newline or whitespace).
 *
 * The last two binary chunks (encoded in Base64) are, in that order,
 * the salt and the output. Both are required. The binary salt length and the
 * output length must be in the allowed ranges defined in argon2.h.
 *
 * The ctx struct must contain buffers large enough to hold the salt and pwd
 * when it is fed into decode_string.
 */

int decode_string(argon2_context *ctx, const char *str, argon2_type type) {

/* check for prefix */
#define CC(prefix)                                                             \
    do {                                                                       \
        size_t cc_len = strlen(prefix);                                        \
        if (strncmp(str, prefix, cc_len) != 0) {                               \
            return ARGON2_DECODING_FAIL;                                       \
        }                                                                      \
        str += cc_len;                                                         \
    } while ((void)0, 0)

/* optional prefix checking with supplied code */
#define CC_opt(prefix, code)                                                   \
    do {                                                                       \
        size_t cc_len = strlen(prefix);                                        \
        if (strncmp(str, prefix, cc_len) == 0) {                               \
            str += cc_len;                                                     \
            { code; }                                                          \
        }                                                                      \
    } while ((void)0, 0)

/* Decoding prefix into decimal */
#define DECIMAL(x)                                                             \
    do {                                                                       \
        unsigned long dec_x;                                                   \
        str = decode_decimal(str, &dec_x);                                     \
        if (str == NULL) {                                                     \
            return ARGON2_DECODING_FAIL;                                       \
        }                                                                      \
        (x) = dec_x;                                                           \
    } while ((void)0, 0)


/* Decoding prefix into uint32_t decimal */
#define DECIMAL_U32(x)                                                         \
    do {                                                                       \
        unsigned long dec_x;                                                   \
        str = decode_decimal(str, &dec_x);                                     \
        if (str == NULL || dec_x > UINT32_MAX) {                               \
            return ARGON2_DECODING_FAIL;                                       \
        }                                                                      \
        (x) = (uint32_t)dec_x;                                                 \
    } while ((void)0, 0)


/* Decoding base64 into a binary buffer */
#define BIN(buf, max_len, len)                                                 \
    do {                                                                       \
        size_t bin_len = (max_len);                                            \
        str = from_base64(buf, &bin_len, str);                                 \
        if (str == NULL || bin_len > UINT32_MAX) {                             \
            return ARGON2_DECODING_FAIL;                                       \
        }                                                                      \
        (len) = (uint32_t)bin_len;                                             \
    } while ((void)0, 0)

    size_t maxsaltlen = ctx->saltlen;
    size_t maxoutlen = ctx->outlen;
    int validation_result;
    const char* type_string;

    /* We should start with the argon2_type we are using */
    type_string = argon2_type2string(type, 0);
    if (!type_string) {
        return ARGON2_INCORRECT_TYPE;
    }

    CC("$");
    CC(type_string);

    /* Reading the version number if the default is suppressed */
    ctx->version = ARGON2_VERSION_10;
    CC_opt("$v=", DECIMAL_U32(ctx->version));

    CC("$m=");
    DECIMAL_U32(ctx->m_cost);
    CC(",t=");
    DECIMAL_U32(ctx->t_cost);
    CC(",p=");
    DECIMAL_U32(ctx->lanes);
    ctx->threads = ctx->lanes;

    CC("$");
    BIN(ctx->salt, maxsaltlen, ctx->saltlen);
    CC("$");
    BIN(ctx->out, maxoutlen, ctx->outlen);

    /* The rest of the fields get the default values */
    ctx->secret = NULL;
    ctx->secretlen = 0;
    ctx->ad = NULL;
    ctx->adlen = 0;
    ctx->allocate_cbk = NULL;
    ctx->free_cbk = NULL;
    ctx->flags = ARGON2_DEFAULT_FLAGS;

    /* On return, must have valid context */
    validation_result = validate_inputs(ctx);
    if (validation_result != ARGON2_OK) {
        return validation_result;
    }

    /* Can't have any additional characters */
    if (*str == 0) {
        return ARGON2_OK;
    } else {
        return ARGON2_DECODING_FAIL;
    }
#undef CC
#undef CC_opt
#undef DECIMAL
#undef BIN
}

int encode_string(char *dst, size_t dst_len, argon2_context *ctx,
                  argon2_type type) {
#define SS(str)                                                                \
    do {                                                                       \
        size_t pp_len = strlen(str);                                           \
        if (pp_len >= dst_len) {                                               \
            return ARGON2_ENCODING_FAIL;                                       \
        }                                                                      \
        memcpy(dst, str, pp_len + 1);                                          \
        dst += pp_len;                                                         \
        dst_len -= pp_len;                                                     \
    } while ((void)0, 0)

#define SX(x)                                                                  \
    do {                                                                       \
        char tmp[30];                                                          \
        sprintf(tmp, "%lu", (unsigned long)(x));                               \
        SS(tmp);                                                               \
    } while ((void)0, 0)

#define SB(buf, len)                                                           \
    do {                                                                       \
        size_t sb_len = to_base64(dst, dst_len, buf, len);                     \
        if (sb_len == (size_t)-1) {                                            \
            return ARGON2_ENCODING_FAIL;                                       \
        }                                                                      \
        dst += sb_len;                                                         \
        dst_len -= sb_len;                                                     \
    } while ((void)0, 0)

    const char* type_string = argon2_type2string(type, 0);
    int validation_result = validate_inputs(ctx);

    if (!type_string) {
      return ARGON2_ENCODING_FAIL;
    }

    if (validation_result != ARGON2_OK) {
      return validation_result;
    }


    SS("$");
    SS(type_string);

    SS("$v=");
    SX(ctx->version);

    SS("$m=");
    SX(ctx->m_cost);
    SS(",t=");
    SX(ctx->t_cost);
    SS(",p=");
    SX(ctx->lanes);

    SS("$");
    SB(ctx->salt, ctx->saltlen);

    SS("$");
    SB(ctx->out, ctx->outlen);
    return ARGON2_OK;

#undef SS
#undef SX
#undef SB
}

size_t b64len(uint32_t len) {
    size_t olen = ((size_t)len / 3) << 2;

    switch (len % 3) {
    case 2:
        olen++;
    /* fall through */
    case 1:
        olen += 2;
        break;
    }

    return olen;
}

size_t numlen(uint32_t num) {
    size_t len = 1;
    while (num >= 10) {
        ++len;
        num = num / 10;
    }
    return len;
}









Added build/argon2/src/encoding.h version [fd81495ccf].





























































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#ifndef ENCODING_H
#define ENCODING_H
#include "argon2.h"

#define ARGON2_MAX_DECODED_LANES UINT32_C(255)
#define ARGON2_MIN_DECODED_SALT_LEN UINT32_C(8)
#define ARGON2_MIN_DECODED_OUT_LEN UINT32_C(12)

/*
* encode an Argon2 hash string into the provided buffer. 'dst_len'
* contains the size, in characters, of the 'dst' buffer; if 'dst_len'
* is less than the number of required characters (including the
* terminating 0), then this function returns ARGON2_ENCODING_ERROR.
*
* on success, ARGON2_OK is returned.
*/
int encode_string(char *dst, size_t dst_len, argon2_context *ctx,
                  argon2_type type);

/*
* Decodes an Argon2 hash string into the provided structure 'ctx'.
* The only fields that must be set prior to this call are ctx.saltlen and
* ctx.outlen (which must be the maximal salt and out length values that are
* allowed), ctx.salt and ctx.out (which must be buffers of the specified
* length), and ctx.pwd and ctx.pwdlen which must hold a valid password.
*
* Invalid input string causes an error. On success, the ctx is valid and all
* fields have been initialized.
*
* Returned value is ARGON2_OK on success, other ARGON2_ codes on error.
*/
int decode_string(argon2_context *ctx, const char *str, argon2_type type);

/* Returns the length of the encoded byte stream with length len */
size_t b64len(uint32_t len);

/* Returns the length of the encoded number num */
size_t numlen(uint32_t num);

#endif








Added build/argon2/src/ref.c version [4805673d20].






































































































































































































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/*
 * Argon2 reference source code package - reference C implementations
 *
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
 *
 * You may use this work under the terms of a Creative Commons CC0 1.0
 * License/Waiver or the Apache Public License 2.0, at your option. The terms of
 * these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
 *
 * You should have received a copy of both of these licenses along with this
 * software. If not, they may be obtained at the above URLs.
 */

#include <stdint.h>
#include <string.h>
#include <stdlib.h>

#include "argon2.h"
#include "core.h"

#include "blake2/blamka-round-ref.h"
#include "blake2/blake2-impl.h"
#include "blake2/blake2.h"


/*
 * Function fills a new memory block and optionally XORs the old block over the new one.
 * @next_block must be initialized.
 * @param prev_block Pointer to the previous block
 * @param ref_block Pointer to the reference block
 * @param next_block Pointer to the block to be constructed
 * @param with_xor Whether to XOR into the new block (1) or just overwrite (0)
 * @pre all block pointers must be valid
 */
static void fill_block(const block *prev_block, const block *ref_block,
                       block *next_block, int with_xor) {
    block blockR, block_tmp;
    unsigned i;

    copy_block(&blockR, ref_block);
    xor_block(&blockR, prev_block);
    copy_block(&block_tmp, &blockR);
    /* Now blockR = ref_block + prev_block and block_tmp = ref_block + prev_block */
    if (with_xor) {
        /* Saving the next block contents for XOR over: */
        xor_block(&block_tmp, next_block);
        /* Now blockR = ref_block + prev_block and
           block_tmp = ref_block + prev_block + next_block */
    }

    /* Apply Blake2 on columns of 64-bit words: (0,1,...,15) , then
       (16,17,..31)... finally (112,113,...127) */
    for (i = 0; i < 8; ++i) {
        BLAKE2_ROUND_NOMSG(
            blockR.v[16 * i], blockR.v[16 * i + 1], blockR.v[16 * i + 2],
            blockR.v[16 * i + 3], blockR.v[16 * i + 4], blockR.v[16 * i + 5],
            blockR.v[16 * i + 6], blockR.v[16 * i + 7], blockR.v[16 * i + 8],
            blockR.v[16 * i + 9], blockR.v[16 * i + 10], blockR.v[16 * i + 11],
            blockR.v[16 * i + 12], blockR.v[16 * i + 13], blockR.v[16 * i + 14],
            blockR.v[16 * i + 15]);
    }

    /* Apply Blake2 on rows of 64-bit words: (0,1,16,17,...112,113), then
       (2,3,18,19,...,114,115).. finally (14,15,30,31,...,126,127) */
    for (i = 0; i < 8; i++) {
        BLAKE2_ROUND_NOMSG(
            blockR.v[2 * i], blockR.v[2 * i + 1], blockR.v[2 * i + 16],
            blockR.v[2 * i + 17], blockR.v[2 * i + 32], blockR.v[2 * i + 33],
            blockR.v[2 * i + 48], blockR.v[2 * i + 49], blockR.v[2 * i + 64],
            blockR.v[2 * i + 65], blockR.v[2 * i + 80], blockR.v[2 * i + 81],
            blockR.v[2 * i + 96], blockR.v[2 * i + 97], blockR.v[2 * i + 112],
            blockR.v[2 * i + 113]);
    }

    copy_block(next_block, &block_tmp);
    xor_block(next_block, &blockR);
}

static void next_addresses(block *address_block, block *input_block,
                           const block *zero_block) {
    input_block->v[6]++;
    fill_block(zero_block, input_block, address_block, 0);
    fill_block(zero_block, address_block, address_block, 0);
}

void fill_segment(const argon2_instance_t *instance,
                  argon2_position_t position) {
    block *ref_block = NULL, *curr_block = NULL;
    block address_block, input_block, zero_block;
    uint64_t pseudo_rand, ref_index, ref_lane;
    uint32_t prev_offset, curr_offset;
    uint32_t starting_index;
    uint32_t i;
    int data_independent_addressing;

    if (instance == NULL) {
        return;
    }

    data_independent_addressing =
        (instance->type == Argon2_i) ||
        (instance->type == Argon2_id && (position.pass == 0) &&
         (position.slice < ARGON2_SYNC_POINTS / 2));

    if (data_independent_addressing) {
        init_block_value(&zero_block, 0);
        init_block_value(&input_block, 0);

        input_block.v[0] = position.pass;
        input_block.v[1] = position.lane;
        input_block.v[2] = position.slice;
        input_block.v[3] = instance->memory_blocks;
        input_block.v[4] = instance->passes;
        input_block.v[5] = instance->type;
    }

    starting_index = 0;

    if ((0 == position.pass) && (0 == position.slice)) {
        starting_index = 2; /* we have already generated the first two blocks */

        /* Don't forget to generate the first block of addresses: */
        if (data_independent_addressing) {
            next_addresses(&address_block, &input_block, &zero_block);
        }
    }

    /* Offset of the current block */
    curr_offset = position.lane * instance->lane_length +
                  position.slice * instance->segment_length + starting_index;

    if (0 == curr_offset % instance->lane_length) {
        /* Last block in this lane */
        prev_offset = curr_offset + instance->lane_length - 1;
    } else {
        /* Previous block */
        prev_offset = curr_offset - 1;
    }

    for (i = starting_index; i < instance->segment_length;
         ++i, ++curr_offset, ++prev_offset) {
        /*1.1 Rotating prev_offset if needed */
        if (curr_offset % instance->lane_length == 1) {
            prev_offset = curr_offset - 1;
        }

        /* 1.2 Computing the index of the reference block */
        /* 1.2.1 Taking pseudo-random value from the previous block */
        if (data_independent_addressing) {
            if (i % ARGON2_ADDRESSES_IN_BLOCK == 0) {
                next_addresses(&address_block, &input_block, &zero_block);
            }
            pseudo_rand = address_block.v[i % ARGON2_ADDRESSES_IN_BLOCK];
        } else {
            pseudo_rand = instance->memory[prev_offset].v[0];
        }

        /* 1.2.2 Computing the lane of the reference block */
        ref_lane = ((pseudo_rand >> 32)) % instance->lanes;

        if ((position.pass == 0) && (position.slice == 0)) {
            /* Can not reference other lanes yet */
            ref_lane = position.lane;
        }

        /* 1.2.3 Computing the number of possible reference block within the
         * lane.
         */
        position.index = i;
        ref_index = index_alpha(instance, &position, pseudo_rand & 0xFFFFFFFF,
                                ref_lane == position.lane);

        /* 2 Creating a new block */
        ref_block =
            instance->memory + instance->lane_length * ref_lane + ref_index;
        curr_block = instance->memory + curr_offset;
        if (ARGON2_VERSION_10 == instance->version) {
            /* version 1.2.1 and earlier: overwrite, not XOR */
            fill_block(instance->memory + prev_offset, ref_block, curr_block, 0);
        } else {
            if(0 == position.pass) {
                fill_block(instance->memory + prev_offset, ref_block,
                           curr_block, 0);
            } else {
                fill_block(instance->memory + prev_offset, ref_block,
                           curr_block, 1);
            }
        }
    }
}








Deleted build/blake2b/Makefile version [43ab4a38f2].



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PREFIX := $(shell pwd)/INST

all: out/blake2b.c out/blake2.h out/blake2-impl.h

out/blake2b.c: src/blake2b-ref.c blake2-nacl.c
	mkdir -p out
	cat src/blake2b-ref.c blake2-nacl.c > out/blake2b.c

out/blake2.h: src/blake2.h blake2-nacl.h
	mkdir -p out
	cat src/blake2.h blake2-nacl.h > out/blake2.h

out/blake2-impl.h: src/blake2-impl.h
	mkdir -p out
	cp src/blake2-impl.h out

install: out/blake2b.c out/blake2.h out/blake2-impl.h
	mkdir -p '$(PREFIX)'
	cp out/blake2b.c out/blake2.h out/blake2-impl.h '$(PREFIX)'

clean:
	rm -f out/blake2b.c out/blake2.h out/blake2-impl.h
	-rmdir out

distclean: clean

.PHONY: all install clean distclean








Deleted build/blake2b/blake2-nacl.c version [41e5cf5dd8].



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#if defined(NACL_ED25519_BLAKE2B)
int crypto_hash_blake2b( unsigned char *out, const unsigned char *in, unsigned long long inlen )
{
  return blake2b( out, BLAKE2B_OUTBYTES, in, inlen, NULL, 0 );
}
#endif








Deleted build/blake2b/blake2-nacl.h version [25d1438790].



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#if defined(NACL_ED25519_BLAKE2B)
#ifndef BLAKE2_NACL_H
#define BLAKE2_NACL_H 1
#define crypto_hash_PRIMITIVE "blake2b"
#define crypto_hash_BYTES crypto_hash_blake2b_BYTES
#define crypto_hash_IMPLEMENTATION crypto_hash_blake2b_IMPLEMENTATION
#define crypto_hash_VERSION crypto_hash_blake2b_VERSION
#define crypto_hash_blake2b_BYTES 64
#define crypto_hash_blake2b_VERSION "-"
#define crypto_hash_blake2b_IMPLEMENTATION "blake2b-ref"
#define crypto_hash crypto_hash_blake2b
#if defined(__cplusplus)
extern "C" {
#endif
int crypto_hash_blake2b(unsigned char *,const unsigned char *,unsigned long long);
#if defined(__cplusplus)
}
#endif
#endif
#endif








Deleted build/blake2b/src/blake2-impl.h version [d0bfa55cf5].



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/*
   BLAKE2 reference source code package - reference C implementations

   Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
   terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
   your option.  The terms of these licenses can be found at:

   - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
   - OpenSSL license   : https://www.openssl.org/source/license.html
   - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0

   More information about the BLAKE2 hash function can be found at
   https://blake2.net.
*/
#ifndef BLAKE2_IMPL_H
#define BLAKE2_IMPL_H

#include <stdint.h>
#include <string.h>

#if !defined(__cplusplus) && (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L)
  #if   defined(_MSC_VER)
    #define BLAKE2_INLINE __inline
  #elif defined(__GNUC__)
    #define BLAKE2_INLINE __inline__
  #else
    #define BLAKE2_INLINE
  #endif
#else
  #define BLAKE2_INLINE inline
#endif

static BLAKE2_INLINE uint32_t load32( const void *src )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  uint32_t w;
  memcpy(&w, src, sizeof w);
  return w;
#else
  const uint8_t *p = ( const uint8_t * )src;
  return (( uint32_t )( p[0] ) <<  0) |
         (( uint32_t )( p[1] ) <<  8) |
         (( uint32_t )( p[2] ) << 16) |
         (( uint32_t )( p[3] ) << 24) ;
#endif
}

static BLAKE2_INLINE uint64_t load64( const void *src )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  uint64_t w;
  memcpy(&w, src, sizeof w);
  return w;
#else
  const uint8_t *p = ( const uint8_t * )src;
  return (( uint64_t )( p[0] ) <<  0) |
         (( uint64_t )( p[1] ) <<  8) |
         (( uint64_t )( p[2] ) << 16) |
         (( uint64_t )( p[3] ) << 24) |
         (( uint64_t )( p[4] ) << 32) |
         (( uint64_t )( p[5] ) << 40) |
         (( uint64_t )( p[6] ) << 48) |
         (( uint64_t )( p[7] ) << 56) ;
#endif
}

static BLAKE2_INLINE uint16_t load16( const void *src )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  uint16_t w;
  memcpy(&w, src, sizeof w);
  return w;
#else
  const uint8_t *p = ( const uint8_t * )src;
  return (( uint16_t )( p[0] ) <<  0) |
         (( uint16_t )( p[1] ) <<  8) ;
#endif
}

static BLAKE2_INLINE void store16( void *dst, uint16_t w )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  memcpy(dst, &w, sizeof w);
#else
  uint8_t *p = ( uint8_t * )dst;
  *p++ = ( uint8_t )w; w >>= 8;
  *p++ = ( uint8_t )w;
#endif
}

static BLAKE2_INLINE void store32( void *dst, uint32_t w )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  memcpy(dst, &w, sizeof w);
#else
  uint8_t *p = ( uint8_t * )dst;
  p[0] = (uint8_t)(w >>  0);
  p[1] = (uint8_t)(w >>  8);
  p[2] = (uint8_t)(w >> 16);
  p[3] = (uint8_t)(w >> 24);
#endif
}

static BLAKE2_INLINE void store64( void *dst, uint64_t w )
{
#if defined(NATIVE_LITTLE_ENDIAN)
  memcpy(dst, &w, sizeof w);
#else
  uint8_t *p = ( uint8_t * )dst;
  p[0] = (uint8_t)(w >>  0);
  p[1] = (uint8_t)(w >>  8);
  p[2] = (uint8_t)(w >> 16);
  p[3] = (uint8_t)(w >> 24);
  p[4] = (uint8_t)(w >> 32);
  p[5] = (uint8_t)(w >> 40);
  p[6] = (uint8_t)(w >> 48);
  p[7] = (uint8_t)(w >> 56);
#endif
}

static BLAKE2_INLINE uint64_t load48( const void *src )
{
  const uint8_t *p = ( const uint8_t * )src;
  return (( uint64_t )( p[0] ) <<  0) |
         (( uint64_t )( p[1] ) <<  8) |
         (( uint64_t )( p[2] ) << 16) |
         (( uint64_t )( p[3] ) << 24) |
         (( uint64_t )( p[4] ) << 32) |
         (( uint64_t )( p[5] ) << 40) ;
}

static BLAKE2_INLINE void store48( void *dst, uint64_t w )
{
  uint8_t *p = ( uint8_t * )dst;
  p[0] = (uint8_t)(w >>  0);
  p[1] = (uint8_t)(w >>  8);
  p[2] = (uint8_t)(w >> 16);
  p[3] = (uint8_t)(w >> 24);
  p[4] = (uint8_t)(w >> 32);
  p[5] = (uint8_t)(w >> 40);
}

static BLAKE2_INLINE uint32_t rotr32( const uint32_t w, const unsigned c )
{
  return ( w >> c ) | ( w << ( 32 - c ) );
}

static BLAKE2_INLINE uint64_t rotr64( const uint64_t w, const unsigned c )
{
  return ( w >> c ) | ( w << ( 64 - c ) );
}

/* prevents compiler optimizing out memset() */
static BLAKE2_INLINE void secure_zero_memory(void *v, size_t n)
{
  static void *(*const volatile memset_v)(void *, int, size_t) = &memset;
  memset_v(v, 0, n);
}

#endif








Deleted build/blake2b/src/blake2.h version [69e1232ee2].



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/*
   BLAKE2 reference source code package - reference C implementations

   Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
   terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
   your option.  The terms of these licenses can be found at:

   - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
   - OpenSSL license   : https://www.openssl.org/source/license.html
   - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0

   More information about the BLAKE2 hash function can be found at
   https://blake2.net.
*/
#ifndef BLAKE2_H
#define BLAKE2_H

#include <stddef.h>
#include <stdint.h>

#if defined(_MSC_VER)
#define BLAKE2_PACKED(x) __pragma(pack(push, 1)) x __pragma(pack(pop))
#else
#define BLAKE2_PACKED(x) x __attribute__((packed))
#endif

#if defined(__cplusplus)
extern "C" {
#endif

  enum blake2s_constant
  {
    BLAKE2S_BLOCKBYTES = 64,
    BLAKE2S_OUTBYTES   = 32,
    BLAKE2S_KEYBYTES   = 32,
    BLAKE2S_SALTBYTES  = 8,
    BLAKE2S_PERSONALBYTES = 8
  };

  enum blake2b_constant
  {
    BLAKE2B_BLOCKBYTES = 128,
    BLAKE2B_OUTBYTES   = 64,
    BLAKE2B_KEYBYTES   = 64,
    BLAKE2B_SALTBYTES  = 16,
    BLAKE2B_PERSONALBYTES = 16
  };

  typedef struct blake2s_state__
  {
    uint32_t h[8];
    uint32_t t[2];
    uint32_t f[2];
    uint8_t  buf[BLAKE2S_BLOCKBYTES];
    size_t   buflen;
    size_t   outlen;
    uint8_t  last_node;
  } blake2s_state;

  typedef struct blake2b_state__
  {
    uint64_t h[8];
    uint64_t t[2];
    uint64_t f[2];
    uint8_t  buf[BLAKE2B_BLOCKBYTES];
    size_t   buflen;
    size_t   outlen;
    uint8_t  last_node;
  } blake2b_state;

  typedef struct blake2sp_state__
  {
    blake2s_state S[8][1];
    blake2s_state R[1];
    uint8_t       buf[8 * BLAKE2S_BLOCKBYTES];
    size_t        buflen;
    size_t        outlen;
  } blake2sp_state;

  typedef struct blake2bp_state__
  {
    blake2b_state S[4][1];
    blake2b_state R[1];
    uint8_t       buf[4 * BLAKE2B_BLOCKBYTES];
    size_t        buflen;
    size_t        outlen;
  } blake2bp_state;


  BLAKE2_PACKED(struct blake2s_param__
  {
    uint8_t  digest_length; /* 1 */
    uint8_t  key_length;    /* 2 */
    uint8_t  fanout;        /* 3 */
    uint8_t  depth;         /* 4 */
    uint32_t leaf_length;   /* 8 */
    uint32_t node_offset;  /* 12 */
    uint16_t xof_length;    /* 14 */
    uint8_t  node_depth;    /* 15 */
    uint8_t  inner_length;  /* 16 */
    /* uint8_t  reserved[0]; */
    uint8_t  salt[BLAKE2S_SALTBYTES]; /* 24 */
    uint8_t  personal[BLAKE2S_PERSONALBYTES];  /* 32 */
  });

  typedef struct blake2s_param__ blake2s_param;

  BLAKE2_PACKED(struct blake2b_param__
  {
    uint8_t  digest_length; /* 1 */
    uint8_t  key_length;    /* 2 */
    uint8_t  fanout;        /* 3 */
    uint8_t  depth;         /* 4 */
    uint32_t leaf_length;   /* 8 */
    uint32_t node_offset;   /* 12 */
    uint32_t xof_length;    /* 16 */
    uint8_t  node_depth;    /* 17 */
    uint8_t  inner_length;  /* 18 */
    uint8_t  reserved[14];  /* 32 */
    uint8_t  salt[BLAKE2B_SALTBYTES]; /* 48 */
    uint8_t  personal[BLAKE2B_PERSONALBYTES];  /* 64 */
  });

  typedef struct blake2b_param__ blake2b_param;

  typedef struct blake2xs_state__
  {
    blake2s_state S[1];
    blake2s_param P[1];
  } blake2xs_state;

  typedef struct blake2xb_state__
  {
    blake2b_state S[1];
    blake2b_param P[1];
  } blake2xb_state;

  /* Padded structs result in a compile-time error */
  enum {
    BLAKE2_DUMMY_1 = 1/(sizeof(blake2s_param) == BLAKE2S_OUTBYTES),
    BLAKE2_DUMMY_2 = 1/(sizeof(blake2b_param) == BLAKE2B_OUTBYTES)
  };

  /* Streaming API */
  int blake2s_init( blake2s_state *S, size_t outlen );
  int blake2s_init_key( blake2s_state *S, size_t outlen, const void *key, size_t keylen );
  int blake2s_init_param( blake2s_state *S, const blake2s_param *P );
  int blake2s_update( blake2s_state *S, const void *in, size_t inlen );
  int blake2s_final( blake2s_state *S, void *out, size_t outlen );

  int blake2b_init( blake2b_state *S, size_t outlen );
  int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen );
  int blake2b_init_param( blake2b_state *S, const blake2b_param *P );
  int blake2b_update( blake2b_state *S, const void *in, size_t inlen );
  int blake2b_final( blake2b_state *S, void *out, size_t outlen );

  int blake2sp_init( blake2sp_state *S, size_t outlen );
  int blake2sp_init_key( blake2sp_state *S, size_t outlen, const void *key, size_t keylen );
  int blake2sp_update( blake2sp_state *S, const void *in, size_t inlen );
  int blake2sp_final( blake2sp_state *S, void *out, size_t outlen );

  int blake2bp_init( blake2bp_state *S, size_t outlen );
  int blake2bp_init_key( blake2bp_state *S, size_t outlen, const void *key, size_t keylen );
  int blake2bp_update( blake2bp_state *S, const void *in, size_t inlen );
  int blake2bp_final( blake2bp_state *S, void *out, size_t outlen );

  /* Variable output length API */
  int blake2xs_init( blake2xs_state *S, const size_t outlen );
  int blake2xs_init_key( blake2xs_state *S, const size_t outlen, const void *key, size_t keylen );
  int blake2xs_update( blake2xs_state *S, const void *in, size_t inlen );
  int blake2xs_final(blake2xs_state *S, void *out, size_t outlen);

  int blake2xb_init( blake2xb_state *S, const size_t outlen );
  int blake2xb_init_key( blake2xb_state *S, const size_t outlen, const void *key, size_t keylen );
  int blake2xb_update( blake2xb_state *S, const void *in, size_t inlen );
  int blake2xb_final(blake2xb_state *S, void *out, size_t outlen);

  /* Simple API */
  int blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
  int blake2b( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

  int blake2sp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
  int blake2bp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

  int blake2xs( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
  int blake2xb( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

  /* This is simply an alias for blake2b */
  int blake2( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

#if defined(__cplusplus)
}
#endif

#endif








Deleted build/blake2b/src/blake2b-ref.c version [297ab9afc5].



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/*
   BLAKE2 reference source code package - reference C implementations

   Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
   terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
   your option.  The terms of these licenses can be found at:

   - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
   - OpenSSL license   : https://www.openssl.org/source/license.html
   - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0

   More information about the BLAKE2 hash function can be found at
   https://blake2.net.
*/

#include <stdint.h>
#include <string.h>
#include <stdio.h>

#include "blake2.h"
#include "blake2-impl.h"

static const uint64_t blake2b_IV[8] =
{
  0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
  0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
  0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
  0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
};

static const uint8_t blake2b_sigma[12][16] =
{
  {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 } ,
  { 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 } ,
  { 11,  8, 12,  0,  5,  2, 15, 13, 10, 14,  3,  6,  7,  1,  9,  4 } ,
  {  7,  9,  3,  1, 13, 12, 11, 14,  2,  6,  5, 10,  4,  0, 15,  8 } ,
  {  9,  0,  5,  7,  2,  4, 10, 15, 14,  1, 11, 12,  6,  8,  3, 13 } ,
  {  2, 12,  6, 10,  0, 11,  8,  3,  4, 13,  7,  5, 15, 14,  1,  9 } ,
  { 12,  5,  1, 15, 14, 13,  4, 10,  0,  7,  6,  3,  9,  2,  8, 11 } ,
  { 13, 11,  7, 14, 12,  1,  3,  9,  5,  0, 15,  4,  8,  6,  2, 10 } ,
  {  6, 15, 14,  9, 11,  3,  0,  8, 12,  2, 13,  7,  1,  4, 10,  5 } ,
  { 10,  2,  8,  4,  7,  6,  1,  5, 15, 11,  9, 14,  3, 12, 13 , 0 } ,
  {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 } ,
  { 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 }
};


static void blake2b_set_lastnode( blake2b_state *S )
{
  S->f[1] = (uint64_t)-1;
}

/* Some helper functions, not necessarily useful */
static int blake2b_is_lastblock( const blake2b_state *S )
{
  return S->f[0] != 0;
}

static void blake2b_set_lastblock( blake2b_state *S )
{
  if( S->last_node ) blake2b_set_lastnode( S );

  S->f[0] = (uint64_t)-1;
}

static void blake2b_increment_counter( blake2b_state *S, const uint64_t inc )
{
  S->t[0] += inc;
  S->t[1] += ( S->t[0] < inc );
}

static void blake2b_init0( blake2b_state *S )
{
  size_t i;
  memset( S, 0, sizeof( blake2b_state ) );

  for( i = 0; i < 8; ++i ) S->h[i] = blake2b_IV[i];
}

/* init xors IV with input parameter block */
int blake2b_init_param( blake2b_state *S, const blake2b_param *P )
{
  const uint8_t *p = ( const uint8_t * )( P );
  size_t i;

  blake2b_init0( S );

  /* IV XOR ParamBlock */
  for( i = 0; i < 8; ++i )
    S->h[i] ^= load64( p + sizeof( S->h[i] ) * i );

  S->outlen = P->digest_length;
  return 0;
}



int blake2b_init( blake2b_state *S, size_t outlen )
{
  blake2b_param P[1];

  if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;

  P->digest_length = (uint8_t)outlen;
  P->key_length    = 0;
  P->fanout        = 1;
  P->depth         = 1;
  store32( &P->leaf_length, 0 );
  store32( &P->node_offset, 0 );
  store32( &P->xof_length, 0 );
  P->node_depth    = 0;
  P->inner_length  = 0;
  memset( P->reserved, 0, sizeof( P->reserved ) );
  memset( P->salt,     0, sizeof( P->salt ) );
  memset( P->personal, 0, sizeof( P->personal ) );
  return blake2b_init_param( S, P );
}


int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen )
{
  blake2b_param P[1];

  if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;

  if ( !key || !keylen || keylen > BLAKE2B_KEYBYTES ) return -1;

  P->digest_length = (uint8_t)outlen;
  P->key_length    = (uint8_t)keylen;
  P->fanout        = 1;
  P->depth         = 1;
  store32( &P->leaf_length, 0 );
  store32( &P->node_offset, 0 );
  store32( &P->xof_length, 0 );
  P->node_depth    = 0;
  P->inner_length  = 0;
  memset( P->reserved, 0, sizeof( P->reserved ) );
  memset( P->salt,     0, sizeof( P->salt ) );
  memset( P->personal, 0, sizeof( P->personal ) );

  if( blake2b_init_param( S, P ) < 0 ) return -1;

  {
    uint8_t block[BLAKE2B_BLOCKBYTES];
    memset( block, 0, BLAKE2B_BLOCKBYTES );
    memcpy( block, key, keylen );
    blake2b_update( S, block, BLAKE2B_BLOCKBYTES );
    secure_zero_memory( block, BLAKE2B_BLOCKBYTES ); /* Burn the key from stack */
  }
  return 0;
}

#define G(r,i,a,b,c,d)                      \
  do {                                      \
    a = a + b + m[blake2b_sigma[r][2*i+0]]; \
    d = rotr64(d ^ a, 32);                  \
    c = c + d;                              \
    b = rotr64(b ^ c, 24);                  \
    a = a + b + m[blake2b_sigma[r][2*i+1]]; \
    d = rotr64(d ^ a, 16);                  \
    c = c + d;                              \
    b = rotr64(b ^ c, 63);                  \
  } while(0)

#define ROUND(r)                    \
  do {                              \
    G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
    G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
    G(r,2,v[ 2],v[ 6],v[10],v[14]); \
    G(r,3,v[ 3],v[ 7],v[11],v[15]); \
    G(r,4,v[ 0],v[ 5],v[10],v[15]); \
    G(r,5,v[ 1],v[ 6],v[11],v[12]); \
    G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
    G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
  } while(0)

static void blake2b_compress( blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES] )
{
  uint64_t m[16];
  uint64_t v[16];
  size_t i;

  for( i = 0; i < 16; ++i ) {
    m[i] = load64( block + i * sizeof( m[i] ) );
  }

  for( i = 0; i < 8; ++i ) {
    v[i] = S->h[i];
  }

  v[ 8] = blake2b_IV[0];
  v[ 9] = blake2b_IV[1];
  v[10] = blake2b_IV[2];
  v[11] = blake2b_IV[3];
  v[12] = blake2b_IV[4] ^ S->t[0];
  v[13] = blake2b_IV[5] ^ S->t[1];
  v[14] = blake2b_IV[6] ^ S->f[0];
  v[15] = blake2b_IV[7] ^ S->f[1];

  ROUND( 0 );
  ROUND( 1 );
  ROUND( 2 );
  ROUND( 3 );
  ROUND( 4 );
  ROUND( 5 );
  ROUND( 6 );
  ROUND( 7 );
  ROUND( 8 );
  ROUND( 9 );
  ROUND( 10 );
  ROUND( 11 );

  for( i = 0; i < 8; ++i ) {
    S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
  }
}

#undef G
#undef ROUND

int blake2b_update( blake2b_state *S, const void *pin, size_t inlen )
{
  const unsigned char * in = (const unsigned char *)pin;
  if( inlen > 0 )
  {
    size_t left = S->buflen;
    size_t fill = BLAKE2B_BLOCKBYTES - left;
    if( inlen > fill )
    {
      S->buflen = 0;
      memcpy( S->buf + left, in, fill ); /* Fill buffer */
      blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
      blake2b_compress( S, S->buf ); /* Compress */
      in += fill; inlen -= fill;
      while(inlen > BLAKE2B_BLOCKBYTES) {
        blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
        blake2b_compress( S, in );
        in += BLAKE2B_BLOCKBYTES;
        inlen -= BLAKE2B_BLOCKBYTES;
      }
    }
    memcpy( S->buf + S->buflen, in, inlen );
    S->buflen += inlen;
  }
  return 0;
}

int blake2b_final( blake2b_state *S, void *out, size_t outlen )
{
  uint8_t buffer[BLAKE2B_OUTBYTES] = {0};
  size_t i;

  if( out == NULL || outlen < S->outlen )
    return -1;

  if( blake2b_is_lastblock( S ) )
    return -1;

  blake2b_increment_counter( S, S->buflen );
  blake2b_set_lastblock( S );
  memset( S->buf + S->buflen, 0, BLAKE2B_BLOCKBYTES - S->buflen ); /* Padding */
  blake2b_compress( S, S->buf );

  for( i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
    store64( buffer + sizeof( S->h[i] ) * i, S->h[i] );

  memcpy( out, buffer, S->outlen );
  secure_zero_memory(buffer, sizeof(buffer));
  return 0;
}

/* inlen, at least, should be uint64_t. Others can be size_t. */
int blake2b( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen )
{
  blake2b_state S[1];

  /* Verify parameters */
  if ( NULL == in && inlen > 0 ) return -1;

  if ( NULL == out ) return -1;

  if( NULL == key && keylen > 0 ) return -1;

  if( !outlen || outlen > BLAKE2B_OUTBYTES ) return -1;

  if( keylen > BLAKE2B_KEYBYTES ) return -1;

  if( keylen > 0 )
  {
    if( blake2b_init_key( S, outlen, key, keylen ) < 0 ) return -1;
  }
  else
  {
    if( blake2b_init( S, outlen ) < 0 ) return -1;
  }

  blake2b_update( S, ( const uint8_t * )in, inlen );
  blake2b_final( S, out, outlen );
  return 0;
}

int blake2( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen ) {
  return blake2b(out, outlen, in, inlen, key, keylen);
}

#if defined(SUPERCOP)
int crypto_hash( unsigned char *out, unsigned char *in, unsigned long long inlen )
{
  return blake2b( out, BLAKE2B_OUTBYTES, in, inlen, NULL, 0 );
}
#endif

#if defined(BLAKE2B_SELFTEST)
#include <string.h>
#include "blake2-kat.h"
int main( void )
{
  uint8_t key[BLAKE2B_KEYBYTES];
  uint8_t buf[BLAKE2_KAT_LENGTH];
  size_t i, step;

  for( i = 0; i < BLAKE2B_KEYBYTES; ++i )
    key[i] = ( uint8_t )i;

  for( i = 0; i < BLAKE2_KAT_LENGTH; ++i )
    buf[i] = ( uint8_t )i;

  /* Test simple API */
  for( i = 0; i < BLAKE2_KAT_LENGTH; ++i )
  {
    uint8_t hash[BLAKE2B_OUTBYTES];
    blake2b( hash, BLAKE2B_OUTBYTES, buf, i, key, BLAKE2B_KEYBYTES );

    if( 0 != memcmp( hash, blake2b_keyed_kat[i], BLAKE2B_OUTBYTES ) )
    {
      goto fail;
    }
  }

  /* Test streaming API */
  for(step = 1; step < BLAKE2B_BLOCKBYTES; ++step) {
    for (i = 0; i < BLAKE2_KAT_LENGTH; ++i) {
      uint8_t hash[BLAKE2B_OUTBYTES];
      blake2b_state S;
      uint8_t * p = buf;
      size_t mlen = i;
      int err = 0;

      if( (err = blake2b_init_key(&S, BLAKE2B_OUTBYTES, key, BLAKE2B_KEYBYTES)) < 0 ) {
        goto fail;
      }

      while (mlen >= step) {
        if ( (err = blake2b_update(&S, p, step)) < 0 ) {
          goto fail;
        }
        mlen -= step;
        p += step;
      }
      if ( (err = blake2b_update(&S, p, mlen)) < 0) {
        goto fail;
      }
      if ( (err = blake2b_final(&S, hash, BLAKE2B_OUTBYTES)) < 0) {
        goto fail;
      }

      if (0 != memcmp(hash, blake2b_keyed_kat[i], BLAKE2B_OUTBYTES)) {
        goto fail;
      }
    }
  }

  puts( "ok" );
  return 0;
fail:
  puts("error");
  return -1;
}
#endif








Deleted build/tweetnacl/Makefile version [8da3d99efa].



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PREFIX := $(shell pwd)/INST

all: out/tweetnacl.c out/tweetnacl.h

tweetnacl.h.new: src/tweetnacl.h
	rm -f tweetnacl.h.new tweetnacl.h
	cp src/tweetnacl.h tweetnacl.h.new

tweetnacl.c.new: src/tweetnacl.c
	rm -f tweetnacl.c.new tweetnacl.c
	cp src/tweetnacl.c tweetnacl.c.new

out/tweetnacl.c: tweetnacl.c.new tweetnacl.h.new patches/tweetnacl-ed25519blake2b.diff patches/tweetnacl-derivepubkey.diff
	mkdir -p out
	rm -f tweetnacl.c tweetnacl.h
	patch -p1 < patches/tweetnacl-ed25519blake2b.diff || ( rm -f tweetnacl.c.new tweetnacl.h.new; exit 1 )
	patch -p1 < patches/tweetnacl-derivepubkey.diff || ( rm -f tweetnacl.c.new tweetnacl.h.new; exit 1 )
	rm -f tweetnacl.c.new.orig tweetnacl.h.new.orig
	mv tweetnacl.h.new tweetnacl.h
	mv tweetnacl.c.new tweetnacl.c
	mv tweetnacl.c out

out/tweetnacl.h: out/tweetnacl.c
	mv tweetnacl.h out

install: out/tweetnacl.c out/tweetnacl.h
	mkdir -p '$(PREFIX)'
	cp out/tweetnacl.c out/tweetnacl.h '$(PREFIX)'

clean:
	rm -f tweetnacl.c.new.orig tweetnacl.h.new.orig
	rm -f tweetnacl.h.new tweetnacl.h
	rm -f tweetnacl.c.new tweetnacl.c
	rm -f out/tweetnacl.c out/tweetnacl.h
	-rmdir out

distclean: clean

.PHONY: all install clean distclean








Deleted build/tweetnacl/patches/tweetnacl-derivepubkey.diff version [13b5ea391c].



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diff -uNr a/tweetnacl.c.new b/tweetnacl.c.new
--- a/tweetnacl.c.new	2018-07-01 15:49:55.377820017 -0500
+++ b/tweetnacl.c.new	2018-07-02 00:47:35.564231900 -0500
@@ -653,13 +653,15 @@
   scalarmult(p,q,s);
 }
 
-int crypto_sign_keypair(u8 *pk, u8 *sk)
+int crypto_sign_keypair(u8 *pk, u8 *sk, u8 generate_sk)
 {
   u8 d[64];
   gf p[4];
   int i;
 
-  randombytes(sk, 32);
+  if (generate_sk) {
+    randombytes(sk, 32);
+  }
   crypto_hash(d, sk, 32);
   d[0] &= 248;
   d[31] &= 127;
@@ -668,7 +670,9 @@
   scalarbase(p,d);
   pack(pk,p);
 
-  FOR(i,32) sk[32 + i] = pk[i];
+  if (generate_sk) {
+    FOR(i,32) sk[32 + i] = pk[i];
+  }
   return 0;
 }
 
diff -uNr a/tweetnacl.h.new b/tweetnacl.h.new
--- a/tweetnacl.h.new	2018-07-01 15:49:55.377820017 -0500
+++ b/tweetnacl.h.new	2018-07-02 00:47:06.814232424 -0500
@@ -211,7 +211,7 @@
 #define crypto_sign_ed25519_tweet_SECRETKEYBYTES 64
 extern int crypto_sign_ed25519_tweet(unsigned char *,unsigned long long *,const unsigned char *,unsigned long long,const unsigned char *);
 extern int crypto_sign_ed25519_tweet_open(unsigned char *,unsigned long long *,const unsigned char *,unsigned long long,const unsigned char *);
-extern int crypto_sign_ed25519_tweet_keypair(unsigned char *,unsigned char *);
+extern int crypto_sign_ed25519_tweet_keypair(unsigned char *,unsigned char *, unsigned char);
 #define crypto_sign_ed25519_tweet_VERSION "-"
 #define crypto_sign_ed25519 crypto_sign_ed25519_tweet
 #define crypto_sign_ed25519_open crypto_sign_ed25519_tweet_open








Deleted build/tweetnacl/patches/tweetnacl-ed25519blake2b.diff version [df305f7e81].



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--- a/tweetnacl.c.new
+++ b/tweetnacl.c.new
@@ -32,12 +32,14 @@
   return (u<<8)|x[0];
 }
 
+#ifndef NACL_ED25519_BLAKE2B
 static u64 dl64(const u8 *x)
 {
   u64 i,u=0;
   FOR(i,8) u=(u<<8)|x[i];
   return u;
 }
+#endif
 
 sv st32(u8 *x,u32 u)
 {
@@ -45,11 +47,13 @@
   FOR(i,4) { x[i] = u; u >>= 8; }
 }
 
+#ifndef NACL_ED25519_BLAKE2B
 sv ts64(u8 *x,u64 u)
 {
   int i;
   for (i = 7;i >= 0;--i) { x[i] = u; u >>= 8; }
 }
+#endif
 
 static int vn(const u8 *x,const u8 *y,int n)
 {
@@ -484,6 +488,7 @@
   return crypto_box_open_afternm(m,c,d,n,k);
 }
 
+#ifndef NACL_ED25519_BLAKE2B
 static u64 R(u64 x,int c) { return (x >> c) | (x << (64 - c)); }
 static u64 Ch(u64 x,u64 y,u64 z) { return (x & y) ^ (~x & z); }
 static u64 Maj(u64 x,u64 y,u64 z) { return (x & y) ^ (x & z) ^ (y & z); }
@@ -584,6 +589,7 @@
 
   return 0;
 }
+#endif
 
 sv add(gf p[4],gf q[4])
 {
--- a/tweetnacl.h.new
+++ b/tweetnacl.h.new
@@ -118,11 +118,15 @@
 #define crypto_hashblocks_sha256_BLOCKBYTES crypto_hashblocks_sha256_tweet_BLOCKBYTES
 #define crypto_hashblocks_sha256_VERSION crypto_hashblocks_sha256_tweet_VERSION
 #define crypto_hashblocks_sha256_IMPLEMENTATION "crypto_hashblocks/sha256/tweet"
+#ifndef NACL_ED25519_BLAKE2B
 #define crypto_hash_PRIMITIVE "sha512"
 #define crypto_hash crypto_hash_sha512
 #define crypto_hash_BYTES crypto_hash_sha512_BYTES
 #define crypto_hash_IMPLEMENTATION crypto_hash_sha512_IMPLEMENTATION
 #define crypto_hash_VERSION crypto_hash_sha512_VERSION
+#else
+#include "blake2.h"
+#endif
 #define crypto_hash_sha512_tweet_BYTES 64
 extern int crypto_hash_sha512_tweet(unsigned char *,const unsigned char *,unsigned long long);
 #define crypto_hash_sha512_tweet_VERSION "-"








Deleted build/tweetnacl/src/tweetnacl.c version [4925273a99].



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#include "tweetnacl.h"
#define FOR(i,n) for (i = 0;i < n;++i)
#define sv static void

typedef unsigned char u8;
typedef unsigned long u32;
typedef unsigned long long u64;
typedef long long i64;
typedef i64 gf[16];
extern void randombytes(u8 *,u64);

static const u8
  _0[16],
  _9[32] = {9};
static const gf
  gf0,
  gf1 = {1},
  _121665 = {0xDB41,1},
  D = {0x78a3, 0x1359, 0x4dca, 0x75eb, 0xd8ab, 0x4141, 0x0a4d, 0x0070, 0xe898, 0x7779, 0x4079, 0x8cc7, 0xfe73, 0x2b6f, 0x6cee, 0x5203},
  D2 = {0xf159, 0x26b2, 0x9b94, 0xebd6, 0xb156, 0x8283, 0x149a, 0x00e0, 0xd130, 0xeef3, 0x80f2, 0x198e, 0xfce7, 0x56df, 0xd9dc, 0x2406},
  X = {0xd51a, 0x8f25, 0x2d60, 0xc956, 0xa7b2, 0x9525, 0xc760, 0x692c, 0xdc5c, 0xfdd6, 0xe231, 0xc0a4, 0x53fe, 0xcd6e, 0x36d3, 0x2169},
  Y = {0x6658, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666},
  I = {0xa0b0, 0x4a0e, 0x1b27, 0xc4ee, 0xe478, 0xad2f, 0x1806, 0x2f43, 0xd7a7, 0x3dfb, 0x0099, 0x2b4d, 0xdf0b, 0x4fc1, 0x2480, 0x2b83};

static u32 L32(u32 x,int c) { return (x << c) | ((x&0xffffffff) >> (32 - c)); }

static u32 ld32(const u8 *x)
{
  u32 u = x[3];
  u = (u<<8)|x[2];
  u = (u<<8)|x[1];
  return (u<<8)|x[0];
}

static u64 dl64(const u8 *x)
{
  u64 i,u=0;
  FOR(i,8) u=(u<<8)|x[i];
  return u;
}

sv st32(u8 *x,u32 u)
{
  int i;
  FOR(i,4) { x[i] = u; u >>= 8; }
}

sv ts64(u8 *x,u64 u)
{
  int i;
  for (i = 7;i >= 0;--i) { x[i] = u; u >>= 8; }
}

static int vn(const u8 *x,const u8 *y,int n)
{
  u32 i,d = 0;
  FOR(i,n) d |= x[i]^y[i];
  return (1 & ((d - 1) >> 8)) - 1;
}

int crypto_verify_16(const u8 *x,const u8 *y)
{
  return vn(x,y,16);
}

int crypto_verify_32(const u8 *x,const u8 *y)
{
  return vn(x,y,32);
}

sv core(u8 *out,const u8 *in,const u8 *k,const u8 *c,int h)
{
  u32 w[16],x[16],y[16],t[4];
  int i,j,m;

  FOR(i,4) {
    x[5*i] = ld32(c+4*i);
    x[1+i] = ld32(k+4*i);
    x[6+i] = ld32(in+4*i);
    x[11+i] = ld32(k+16+4*i);
  }

  FOR(i,16) y[i] = x[i];

  FOR(i,20) {
    FOR(j,4) {
      FOR(m,4) t[m] = x[(5*j+4*m)%16];
      t[1] ^= L32(t[0]+t[3], 7);
      t[2] ^= L32(t[1]+t[0], 9);
      t[3] ^= L32(t[2]+t[1],13);
      t[0] ^= L32(t[3]+t[2],18);
      FOR(m,4) w[4*j+(j+m)%4] = t[m];
    }
    FOR(m,16) x[m] = w[m];
  }

  if (h) {
    FOR(i,16) x[i] += y[i];
    FOR(i,4) {
      x[5*i] -= ld32(c+4*i);
      x[6+i] -= ld32(in+4*i);
    }
    FOR(i,4) {
      st32(out+4*i,x[5*i]);
      st32(out+16+4*i,x[6+i]);
    }
  } else
    FOR(i,16) st32(out + 4 * i,x[i] + y[i]);
}

int crypto_core_salsa20(u8 *out,const u8 *in,const u8 *k,const u8 *c)
{
  core(out,in,k,c,0);
  return 0;
}

int crypto_core_hsalsa20(u8 *out,const u8 *in,const u8 *k,const u8 *c)
{
  core(out,in,k,c,1);
  return 0;
}

static const u8 sigma[16] = "expand 32-byte k";

int crypto_stream_salsa20_xor(u8 *c,const u8 *m,u64 b,const u8 *n,const u8 *k)
{
  u8 z[16],x[64];
  u32 u,i;
  if (!b) return 0;
  FOR(i,16) z[i] = 0;
  FOR(i,8) z[i] = n[i];
  while (b >= 64) {
    crypto_core_salsa20(x,z,k,sigma);
    FOR(i,64) c[i] = (m?m[i]:0) ^ x[i];
    u = 1;
    for (i = 8;i < 16;++i) {
      u += (u32) z[i];
      z[i] = u;
      u >>= 8;
    }
    b -= 64;
    c += 64;
    if (m) m += 64;
  }
  if (b) {
    crypto_core_salsa20(x,z,k,sigma);
    FOR(i,b) c[i] = (m?m[i]:0) ^ x[i];
  }
  return 0;
}

int crypto_stream_salsa20(u8 *c,u64 d,const u8 *n,const u8 *k)
{
  return crypto_stream_salsa20_xor(c,0,d,n,k);
}

int crypto_stream(u8 *c,u64 d,const u8 *n,const u8 *k)
{
  u8 s[32];
  crypto_core_hsalsa20(s,n,k,sigma);
  return crypto_stream_salsa20(c,d,n+16,s);
}

int crypto_stream_xor(u8 *c,const u8 *m,u64 d,const u8 *n,const u8 *k)
{
  u8 s[32];
  crypto_core_hsalsa20(s,n,k,sigma);
  return crypto_stream_salsa20_xor(c,m,d,n+16,s);
}

sv add1305(u32 *h,const u32 *c)
{
  u32 j,u = 0;
  FOR(j,17) {
    u += h[j] + c[j];
    h[j] = u & 255;
    u >>= 8;
  }
}

static const u32 minusp[17] = {
  5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 252
} ;

int crypto_onetimeauth(u8 *out,const u8 *m,u64 n,const u8 *k)
{
  u32 s,i,j,u,x[17],r[17],h[17],c[17],g[17];

  FOR(j,17) r[j]=h[j]=0;
  FOR(j,16) r[j]=k[j];
  r[3]&=15;
  r[4]&=252;
  r[7]&=15;
  r[8]&=252;
  r[11]&=15;
  r[12]&=252;
  r[15]&=15;

  while (n > 0) {
    FOR(j,17) c[j] = 0;
    for (j = 0;(j < 16) && (j < n);++j) c[j] = m[j];
    c[j] = 1;
    m += j; n -= j;
    add1305(h,c);
    FOR(i,17) {
      x[i] = 0;
      FOR(j,17) x[i] += h[j] * ((j <= i) ? r[i - j] : 320 * r[i + 17 - j]);
    }
    FOR(i,17) h[i] = x[i];
    u = 0;
    FOR(j,16) {
      u += h[j];
      h[j] = u & 255;
      u >>= 8;
    }
    u += h[16]; h[16] = u & 3;
    u = 5 * (u >> 2);
    FOR(j,16) {
      u += h[j];
      h[j] = u & 255;
      u >>= 8;
    }
    u += h[16]; h[16] = u;
  }

  FOR(j,17) g[j] = h[j];
  add1305(h,minusp);
  s = -(h[16] >> 7);
  FOR(j,17) h[j] ^= s & (g[j] ^ h[j]);

  FOR(j,16) c[j] = k[j + 16];
  c[16] = 0;
  add1305(h,c);
  FOR(j,16) out[j] = h[j];
  return 0;
}

int crypto_onetimeauth_verify(const u8 *h,const u8 *m,u64 n,const u8 *k)
{
  u8 x[16];
  crypto_onetimeauth(x,m,n,k);
  return crypto_verify_16(h,x);
}

int crypto_secretbox(u8 *c,const u8 *m,u64 d,const u8 *n,const u8 *k)
{
  int i;
  if (d < 32) return -1;
  crypto_stream_xor(c,m,d,n,k);
  crypto_onetimeauth(c + 16,c + 32,d - 32,c);
  FOR(i,16) c[i] = 0;
  return 0;
}

int crypto_secretbox_open(u8 *m,const u8 *c,u64 d,const u8 *n,const u8 *k)
{
  int i;
  u8 x[32];
  if (d < 32) return -1;
  crypto_stream(x,32,n,k);
  if (crypto_onetimeauth_verify(c + 16,c + 32,d - 32,x) != 0) return -1;
  crypto_stream_xor(m,c,d,n,k);
  FOR(i,32) m[i] = 0;
  return 0;
}

sv set25519(gf r, const gf a)
{
  int i;
  FOR(i,16) r[i]=a[i];
}

sv car25519(gf o)
{
  int i;
  i64 c;
  FOR(i,16) {
    o[i]+=(1LL<<16);
    c=o[i]>>16;
    o[(i+1)*(i<15)]+=c-1+37*(c-1)*(i==15);
    o[i]-=c<<16;
  }
}

sv sel25519(gf p,gf q,int b)
{
  i64 t,i,c=~(b-1);
  FOR(i,16) {
    t= c&(p[i]^q[i]);
    p[i]^=t;
    q[i]^=t;
  }
}

sv pack25519(u8 *o,const gf n)
{
  int i,j,b;
  gf m,t;
  FOR(i,16) t[i]=n[i];
  car25519(t);
  car25519(t);
  car25519(t);
  FOR(j,2) {
    m[0]=t[0]-0xffed;
    for(i=1;i<15;i++) {
      m[i]=t[i]-0xffff-((m[i-1]>>16)&1);
      m[i-1]&=0xffff;
    }
    m[15]=t[15]-0x7fff-((m[14]>>16)&1);
    b=(m[15]>>16)&1;
    m[14]&=0xffff;
    sel25519(t,m,1-b);
  }
  FOR(i,16) {
    o[2*i]=t[i]&0xff;
    o[2*i+1]=t[i]>>8;
  }
}

static int neq25519(const gf a, const gf b)
{
  u8 c[32],d[32];
  pack25519(c,a);
  pack25519(d,b);
  return crypto_verify_32(c,d);
}

static u8 par25519(const gf a)
{
  u8 d[32];
  pack25519(d,a);
  return d[0]&1;
}

sv unpack25519(gf o, const u8 *n)
{
  int i;
  FOR(i,16) o[i]=n[2*i]+((i64)n[2*i+1]<<8);
  o[15]&=0x7fff;
}

sv A(gf o,const gf a,const gf b)
{
  int i;
  FOR(i,16) o[i]=a[i]+b[i];
}

sv Z(gf o,const gf a,const gf b)
{
  int i;
  FOR(i,16) o[i]=a[i]-b[i];
}

sv M(gf o,const gf a,const gf b)
{
  i64 i,j,t[31];
  FOR(i,31) t[i]=0;
  FOR(i,16) FOR(j,16) t[i+j]+=a[i]*b[j];
  FOR(i,15) t[i]+=38*t[i+16];
  FOR(i,16) o[i]=t[i];
  car25519(o);
  car25519(o);
}

sv S(gf o,const gf a)
{
  M(o,a,a);
}

sv inv25519(gf o,const gf i)
{
  gf c;
  int a;
  FOR(a,16) c[a]=i[a];
  for(a=253;a>=0;a--) {
    S(c,c);
    if(a!=2&&a!=4) M(c,c,i);
  }
  FOR(a,16) o[a]=c[a];
}

sv pow2523(gf o,const gf i)
{
  gf c;
  int a;
  FOR(a,16) c[a]=i[a];
  for(a=250;a>=0;a--) {
    S(c,c);
    if(a!=1) M(c,c,i);
  }
  FOR(a,16) o[a]=c[a];
}

int crypto_scalarmult(u8 *q,const u8 *n,const u8 *p)
{
  u8 z[32];
  i64 x[80],r,i;
  gf a,b,c,d,e,f;
  FOR(i,31) z[i]=n[i];
  z[31]=(n[31]&127)|64;
  z[0]&=248;
  unpack25519(x,p);
  FOR(i,16) {
    b[i]=x[i];
    d[i]=a[i]=c[i]=0;
  }
  a[0]=d[0]=1;
  for(i=254;i>=0;--i) {
    r=(z[i>>3]>>(i&7))&1;
    sel25519(a,b,r);
    sel25519(c,d,r);
    A(e,a,c);
    Z(a,a,c);
    A(c,b,d);
    Z(b,b,d);
    S(d,e);
    S(f,a);
    M(a,c,a);
    M(c,b,e);
    A(e,a,c);
    Z(a,a,c);
    S(b,a);
    Z(c,d,f);
    M(a,c,_121665);
    A(a,a,d);
    M(c,c,a);
    M(a,d,f);
    M(d,b,x);
    S(b,e);
    sel25519(a,b,r);
    sel25519(c,d,r);
  }
  FOR(i,16) {
    x[i+16]=a[i];
    x[i+32]=c[i];
    x[i+48]=b[i];
    x[i+64]=d[i];
  }
  inv25519(x+32,x+32);
  M(x+16,x+16,x+32);
  pack25519(q,x+16);
  return 0;
}

int crypto_scalarmult_base(u8 *q,const u8 *n)
{ 
  return crypto_scalarmult(q,n,_9);
}

int crypto_box_keypair(u8 *y,u8 *x)
{
  randombytes(x,32);
  return crypto_scalarmult_base(y,x);
}

int crypto_box_beforenm(u8 *k,const u8 *y,const u8 *x)
{
  u8 s[32];
  crypto_scalarmult(s,x,y);
  return crypto_core_hsalsa20(k,_0,s,sigma);
}

int crypto_box_afternm(u8 *c,const u8 *m,u64 d,const u8 *n,const u8 *k)
{
  return crypto_secretbox(c,m,d,n,k);
}

int crypto_box_open_afternm(u8 *m,const u8 *c,u64 d,const u8 *n,const u8 *k)
{
  return crypto_secretbox_open(m,c,d,n,k);
}

int crypto_box(u8 *c,const u8 *m,u64 d,const u8 *n,const u8 *y,const u8 *x)
{
  u8 k[32];
  crypto_box_beforenm(k,y,x);
  return crypto_box_afternm(c,m,d,n,k);
}

int crypto_box_open(u8 *m,const u8 *c,u64 d,const u8 *n,const u8 *y,const u8 *x)
{
  u8 k[32];
  crypto_box_beforenm(k,y,x);
  return crypto_box_open_afternm(m,c,d,n,k);
}

static u64 R(u64 x,int c) { return (x >> c) | (x << (64 - c)); }
static u64 Ch(u64 x,u64 y,u64 z) { return (x & y) ^ (~x & z); }
static u64 Maj(u64 x,u64 y,u64 z) { return (x & y) ^ (x & z) ^ (y & z); }
static u64 Sigma0(u64 x) { return R(x,28) ^ R(x,34) ^ R(x,39); }
static u64 Sigma1(u64 x) { return R(x,14) ^ R(x,18) ^ R(x,41); }
static u64 sigma0(u64 x) { return R(x, 1) ^ R(x, 8) ^ (x >> 7); }
static u64 sigma1(u64 x) { return R(x,19) ^ R(x,61) ^ (x >> 6); }

static const u64 K[80] = 
{
  0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
  0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
  0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
  0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
  0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
  0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
  0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
  0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
  0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
  0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
  0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
  0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
  0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
  0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
  0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
  0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
  0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
  0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
  0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
  0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
};

int crypto_hashblocks(u8 *x,const u8 *m,u64 n)
{
  u64 z[8],b[8],a[8],w[16],t;
  int i,j;

  FOR(i,8) z[i] = a[i] = dl64(x + 8 * i);

  while (n >= 128) {
    FOR(i,16) w[i] = dl64(m + 8 * i);

    FOR(i,80) {
      FOR(j,8) b[j] = a[j];
      t = a[7] + Sigma1(a[4]) + Ch(a[4],a[5],a[6]) + K[i] + w[i%16];
      b[7] = t + Sigma0(a[0]) + Maj(a[0],a[1],a[2]);
      b[3] += t;
      FOR(j,8) a[(j+1)%8] = b[j];
      if (i%16 == 15)
	FOR(j,16)
	  w[j] += w[(j+9)%16] + sigma0(w[(j+1)%16]) + sigma1(w[(j+14)%16]);
    }

    FOR(i,8) { a[i] += z[i]; z[i] = a[i]; }

    m += 128;
    n -= 128;
  }

  FOR(i,8) ts64(x+8*i,z[i]);

  return n;
}

static const u8 iv[64] = {
  0x6a,0x09,0xe6,0x67,0xf3,0xbc,0xc9,0x08,
  0xbb,0x67,0xae,0x85,0x84,0xca,0xa7,0x3b,
  0x3c,0x6e,0xf3,0x72,0xfe,0x94,0xf8,0x2b,
  0xa5,0x4f,0xf5,0x3a,0x5f,0x1d,0x36,0xf1,
  0x51,0x0e,0x52,0x7f,0xad,0xe6,0x82,0xd1,
  0x9b,0x05,0x68,0x8c,0x2b,0x3e,0x6c,0x1f,
  0x1f,0x83,0xd9,0xab,0xfb,0x41,0xbd,0x6b,
  0x5b,0xe0,0xcd,0x19,0x13,0x7e,0x21,0x79
} ;

int crypto_hash(u8 *out,const u8 *m,u64 n)
{
  u8 h[64],x[256];
  u64 i,b = n;

  FOR(i,64) h[i] = iv[i];

  crypto_hashblocks(h,m,n);
  m += n;
  n &= 127;
  m -= n;

  FOR(i,256) x[i] = 0;
  FOR(i,n) x[i] = m[i];
  x[n] = 128;

  n = 256-128*(n<112);
  x[n-9] = b >> 61;
  ts64(x+n-8,b<<3);
  crypto_hashblocks(h,x,n);

  FOR(i,64) out[i] = h[i];

  return 0;
}

sv add(gf p[4],gf q[4])
{
  gf a,b,c,d,t,e,f,g,h;
  
  Z(a, p[1], p[0]);
  Z(t, q[1], q[0]);
  M(a, a, t);
  A(b, p[0], p[1]);
  A(t, q[0], q[1]);
  M(b, b, t);
  M(c, p[3], q[3]);
  M(c, c, D2);
  M(d, p[2], q[2]);
  A(d, d, d);
  Z(e, b, a);
  Z(f, d, c);
  A(g, d, c);
  A(h, b, a);

  M(p[0], e, f);
  M(p[1], h, g);
  M(p[2], g, f);
  M(p[3], e, h);
}

sv cswap(gf p[4],gf q[4],u8 b)
{
  int i;
  FOR(i,4)
    sel25519(p[i],q[i],b);
}

sv pack(u8 *r,gf p[4])
{
  gf tx, ty, zi;
  inv25519(zi, p[2]); 
  M(tx, p[0], zi);
  M(ty, p[1], zi);
  pack25519(r, ty);
  r[31] ^= par25519(tx) << 7;
}

sv scalarmult(gf p[4],gf q[4],const u8 *s)
{
  int i;
  set25519(p[0],gf0);
  set25519(p[1],gf1);
  set25519(p[2],gf1);
  set25519(p[3],gf0);
  for (i = 255;i >= 0;--i) {
    u8 b = (s[i/8]>>(i&7))&1;
    cswap(p,q,b);
    add(q,p);
    add(p,p);
    cswap(p,q,b);
  }
}

sv scalarbase(gf p[4],const u8 *s)
{
  gf q[4];
  set25519(q[0],X);
  set25519(q[1],Y);
  set25519(q[2],gf1);
  M(q[3],X,Y);
  scalarmult(p,q,s);
}

int crypto_sign_keypair(u8 *pk, u8 *sk)
{
  u8 d[64];
  gf p[4];
  int i;

  randombytes(sk, 32);
  crypto_hash(d, sk, 32);
  d[0] &= 248;
  d[31] &= 127;
  d[31] |= 64;

  scalarbase(p,d);
  pack(pk,p);

  FOR(i,32) sk[32 + i] = pk[i];
  return 0;
}

static const u64 L[32] = {0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58, 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x10};

sv modL(u8 *r,i64 x[64])
{
  i64 carry,i,j;
  for (i = 63;i >= 32;--i) {
    carry = 0;
    for (j = i - 32;j < i - 12;++j) {
      x[j] += carry - 16 * x[i] * L[j - (i - 32)];
      carry = (x[j] + 128) >> 8;
      x[j] -= carry << 8;
    }
    x[j] += carry;
    x[i] = 0;
  }
  carry = 0;
  FOR(j,32) {
    x[j] += carry - (x[31] >> 4) * L[j];
    carry = x[j] >> 8;
    x[j] &= 255;
  }
  FOR(j,32) x[j] -= carry * L[j];
  FOR(i,32) {
    x[i+1] += x[i] >> 8;
    r[i] = x[i] & 255;
  }
}

sv reduce(u8 *r)
{
  i64 x[64],i;
  FOR(i,64) x[i] = (u64) r[i];
  FOR(i,64) r[i] = 0;
  modL(r,x);
}

int crypto_sign(u8 *sm,u64 *smlen,const u8 *m,u64 n,const u8 *sk)
{
  u8 d[64],h[64],r[64];
  i64 i,j,x[64];
  gf p[4];

  crypto_hash(d, sk, 32);
  d[0] &= 248;
  d[31] &= 127;
  d[31] |= 64;

  *smlen = n+64;
  FOR(i,n) sm[64 + i] = m[i];
  FOR(i,32) sm[32 + i] = d[32 + i];

  crypto_hash(r, sm+32, n+32);
  reduce(r);
  scalarbase(p,r);
  pack(sm,p);

  FOR(i,32) sm[i+32] = sk[i+32];
  crypto_hash(h,sm,n + 64);
  reduce(h);

  FOR(i,64) x[i] = 0;
  FOR(i,32) x[i] = (u64) r[i];
  FOR(i,32) FOR(j,32) x[i+j] += h[i] * (u64) d[j];
  modL(sm + 32,x);

  return 0;
}

static int unpackneg(gf r[4],const u8 p[32])
{
  gf t, chk, num, den, den2, den4, den6;
  set25519(r[2],gf1);
  unpack25519(r[1],p);
  S(num,r[1]);
  M(den,num,D);
  Z(num,num,r[2]);
  A(den,r[2],den);

  S(den2,den);
  S(den4,den2);
  M(den6,den4,den2);
  M(t,den6,num);
  M(t,t,den);

  pow2523(t,t);
  M(t,t,num);
  M(t,t,den);
  M(t,t,den);
  M(r[0],t,den);

  S(chk,r[0]);
  M(chk,chk,den);
  if (neq25519(chk, num)) M(r[0],r[0],I);

  S(chk,r[0]);
  M(chk,chk,den);
  if (neq25519(chk, num)) return -1;

  if (par25519(r[0]) == (p[31]>>7)) Z(r[0],gf0,r[0]);

  M(r[3],r[0],r[1]);
  return 0;
}

int crypto_sign_open(u8 *m,u64 *mlen,const u8 *sm,u64 n,const u8 *pk)
{
  int i;
  u8 t[32],h[64];
  gf p[4],q[4];

  *mlen = -1;
  if (n < 64) return -1;

  if (unpackneg(q,pk)) return -1;

  FOR(i,n) m[i] = sm[i];
  FOR(i,32) m[i+32] = pk[i];
  crypto_hash(h,m,n);
  reduce(h);
  scalarmult(p,q,h);

  scalarbase(q,sm + 32);
  add(p,q);
  pack(t,p);

  n -= 64;
  if (crypto_verify_32(sm, t)) {
    FOR(i,n) m[i] = 0;
    return -1;
  }

  FOR(i,n) m[i] = sm[i + 64];
  *mlen = n;
  return 0;
}








Deleted build/tweetnacl/src/tweetnacl.h version [62a2504e0d].



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#ifndef TWEETNACL_H
#define TWEETNACL_H
#define crypto_auth_PRIMITIVE "hmacsha512256"
#define crypto_auth crypto_auth_hmacsha512256
#define crypto_auth_verify crypto_auth_hmacsha512256_verify
#define crypto_auth_BYTES crypto_auth_hmacsha512256_BYTES
#define crypto_auth_KEYBYTES crypto_auth_hmacsha512256_KEYBYTES
#define crypto_auth_IMPLEMENTATION crypto_auth_hmacsha512256_IMPLEMENTATION
#define crypto_auth_VERSION crypto_auth_hmacsha512256_VERSION
#define crypto_auth_hmacsha512256_tweet_BYTES 32
#define crypto_auth_hmacsha512256_tweet_KEYBYTES 32
extern int crypto_auth_hmacsha512256_tweet(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *);
extern int crypto_auth_hmacsha512256_tweet_verify(const unsigned char *,const unsigned char *,unsigned long long,const unsigned char *);
#define crypto_auth_hmacsha512256_tweet_VERSION "-"
#define crypto_auth_hmacsha512256 crypto_auth_hmacsha512256_tweet
#define crypto_auth_hmacsha512256_verify crypto_auth_hmacsha512256_tweet_verify
#define crypto_auth_hmacsha512256_BYTES crypto_auth_hmacsha512256_tweet_BYTES
#define crypto_auth_hmacsha512256_KEYBYTES crypto_auth_hmacsha512256_tweet_KEYBYTES
#define crypto_auth_hmacsha512256_VERSION crypto_auth_hmacsha512256_tweet_VERSION
#define crypto_auth_hmacsha512256_IMPLEMENTATION "crypto_auth/hmacsha512256/tweet"
#define crypto_box_PRIMITIVE "curve25519xsalsa20poly1305"
#define crypto_box crypto_box_curve25519xsalsa20poly1305
#define crypto_box_open crypto_box_curve25519xsalsa20poly1305_open
#define crypto_box_keypair crypto_box_curve25519xsalsa20poly1305_keypair
#define crypto_box_beforenm crypto_box_curve25519xsalsa20poly1305_beforenm
#define crypto_box_afternm crypto_box_curve25519xsalsa20poly1305_afternm
#define crypto_box_open_afternm crypto_box_curve25519xsalsa20poly1305_open_afternm
#define crypto_box_PUBLICKEYBYTES crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES
#define crypto_box_SECRETKEYBYTES crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES
#define crypto_box_BEFORENMBYTES crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES
#define crypto_box_NONCEBYTES crypto_box_curve25519xsalsa20poly1305_NONCEBYTES
#define crypto_box_ZEROBYTES crypto_box_curve25519xsalsa20poly1305_ZEROBYTES
#define crypto_box_BOXZEROBYTES crypto_box_curve25519xsalsa20poly1305_BOXZEROBYTES
#define crypto_box_IMPLEMENTATION crypto_box_curve25519xsalsa20poly1305_IMPLEMENTATION
#define crypto_box_VERSION crypto_box_curve25519xsalsa20poly1305_VERSION
#define crypto_box_curve25519xsalsa20poly1305_tweet_PUBLICKEYBYTES 32
#define crypto_box_curve25519xsalsa20poly1305_tweet_SECRETKEYBYTES 32
#define crypto_box_curve25519xsalsa20poly1305_tweet_BEFORENMBYTES 32
#define crypto_box_curve25519xsalsa20poly1305_tweet_NONCEBYTES 24
#define crypto_box_curve25519xsalsa20poly1305_tweet_ZEROBYTES 32
#define crypto_box_curve25519xsalsa20poly1305_tweet_BOXZEROBYTES 16
extern int crypto_box_curve25519xsalsa20poly1305_tweet(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *,const unsigned char *);
extern int crypto_box_curve25519xsalsa20poly1305_tweet_open(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *,const unsigned char *);
extern int crypto_box_curve25519xsalsa20poly1305_tweet_keypair(unsigned char *,unsigned char *);
extern int crypto_box_curve25519xsalsa20poly1305_tweet_beforenm(unsigned char *,const unsigned char *,const unsigned char *);
extern int crypto_box_curve25519xsalsa20poly1305_tweet_afternm(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
extern int crypto_box_curve25519xsalsa20poly1305_tweet_open_afternm(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
#define crypto_box_curve25519xsalsa20poly1305_tweet_VERSION "-"
#define crypto_box_curve25519xsalsa20poly1305 crypto_box_curve25519xsalsa20poly1305_tweet
#define crypto_box_curve25519xsalsa20poly1305_open crypto_box_curve25519xsalsa20poly1305_tweet_open
#define crypto_box_curve25519xsalsa20poly1305_keypair crypto_box_curve25519xsalsa20poly1305_tweet_keypair
#define crypto_box_curve25519xsalsa20poly1305_beforenm crypto_box_curve25519xsalsa20poly1305_tweet_beforenm
#define crypto_box_curve25519xsalsa20poly1305_afternm crypto_box_curve25519xsalsa20poly1305_tweet_afternm
#define crypto_box_curve25519xsalsa20poly1305_open_afternm crypto_box_curve25519xsalsa20poly1305_tweet_open_afternm
#define crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES crypto_box_curve25519xsalsa20poly1305_tweet_PUBLICKEYBYTES
#define crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES crypto_box_curve25519xsalsa20poly1305_tweet_SECRETKEYBYTES
#define crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES crypto_box_curve25519xsalsa20poly1305_tweet_BEFORENMBYTES
#define crypto_box_curve25519xsalsa20poly1305_NONCEBYTES crypto_box_curve25519xsalsa20poly1305_tweet_NONCEBYTES
#define crypto_box_curve25519xsalsa20poly1305_ZEROBYTES crypto_box_curve25519xsalsa20poly1305_tweet_ZEROBYTES
#define crypto_box_curve25519xsalsa20poly1305_BOXZEROBYTES crypto_box_curve25519xsalsa20poly1305_tweet_BOXZEROBYTES
#define crypto_box_curve25519xsalsa20poly1305_VERSION crypto_box_curve25519xsalsa20poly1305_tweet_VERSION
#define crypto_box_curve25519xsalsa20poly1305_IMPLEMENTATION "crypto_box/curve25519xsalsa20poly1305/tweet"
#define crypto_core_PRIMITIVE "salsa20"
#define crypto_core crypto_core_salsa20
#define crypto_core_OUTPUTBYTES crypto_core_salsa20_OUTPUTBYTES
#define crypto_core_INPUTBYTES crypto_core_salsa20_INPUTBYTES
#define crypto_core_KEYBYTES crypto_core_salsa20_KEYBYTES
#define crypto_core_CONSTBYTES crypto_core_salsa20_CONSTBYTES
#define crypto_core_IMPLEMENTATION crypto_core_salsa20_IMPLEMENTATION
#define crypto_core_VERSION crypto_core_salsa20_VERSION
#define crypto_core_salsa20_tweet_OUTPUTBYTES 64
#define crypto_core_salsa20_tweet_INPUTBYTES 16
#define crypto_core_salsa20_tweet_KEYBYTES 32
#define crypto_core_salsa20_tweet_CONSTBYTES 16
extern int crypto_core_salsa20_tweet(unsigned char *,const unsigned char *,const unsigned char *,const unsigned char *);
#define crypto_core_salsa20_tweet_VERSION "-"
#define crypto_core_salsa20 crypto_core_salsa20_tweet
#define crypto_core_salsa20_OUTPUTBYTES crypto_core_salsa20_tweet_OUTPUTBYTES
#define crypto_core_salsa20_INPUTBYTES crypto_core_salsa20_tweet_INPUTBYTES
#define crypto_core_salsa20_KEYBYTES crypto_core_salsa20_tweet_KEYBYTES
#define crypto_core_salsa20_CONSTBYTES crypto_core_salsa20_tweet_CONSTBYTES
#define crypto_core_salsa20_VERSION crypto_core_salsa20_tweet_VERSION
#define crypto_core_salsa20_IMPLEMENTATION "crypto_core/salsa20/tweet"
#define crypto_core_hsalsa20_tweet_OUTPUTBYTES 32
#define crypto_core_hsalsa20_tweet_INPUTBYTES 16
#define crypto_core_hsalsa20_tweet_KEYBYTES 32
#define crypto_core_hsalsa20_tweet_CONSTBYTES 16
extern int crypto_core_hsalsa20_tweet(unsigned char *,const unsigned char *,const unsigned char *,const unsigned char *);
#define crypto_core_hsalsa20_tweet_VERSION "-"
#define crypto_core_hsalsa20 crypto_core_hsalsa20_tweet
#define crypto_core_hsalsa20_OUTPUTBYTES crypto_core_hsalsa20_tweet_OUTPUTBYTES
#define crypto_core_hsalsa20_INPUTBYTES crypto_core_hsalsa20_tweet_INPUTBYTES
#define crypto_core_hsalsa20_KEYBYTES crypto_core_hsalsa20_tweet_KEYBYTES
#define crypto_core_hsalsa20_CONSTBYTES crypto_core_hsalsa20_tweet_CONSTBYTES
#define crypto_core_hsalsa20_VERSION crypto_core_hsalsa20_tweet_VERSION
#define crypto_core_hsalsa20_IMPLEMENTATION "crypto_core/hsalsa20/tweet"
#define crypto_hashblocks_PRIMITIVE "sha512"
#define crypto_hashblocks crypto_hashblocks_sha512
#define crypto_hashblocks_STATEBYTES crypto_hashblocks_sha512_STATEBYTES
#define crypto_hashblocks_BLOCKBYTES crypto_hashblocks_sha512_BLOCKBYTES
#define crypto_hashblocks_IMPLEMENTATION crypto_hashblocks_sha512_IMPLEMENTATION
#define crypto_hashblocks_VERSION crypto_hashblocks_sha512_VERSION
#define crypto_hashblocks_sha512_tweet_STATEBYTES 64
#define crypto_hashblocks_sha512_tweet_BLOCKBYTES 128
extern int crypto_hashblocks_sha512_tweet(unsigned char *,const unsigned char *,unsigned long long);
#define crypto_hashblocks_sha512_tweet_VERSION "-"
#define crypto_hashblocks_sha512 crypto_hashblocks_sha512_tweet
#define crypto_hashblocks_sha512_STATEBYTES crypto_hashblocks_sha512_tweet_STATEBYTES
#define crypto_hashblocks_sha512_BLOCKBYTES crypto_hashblocks_sha512_tweet_BLOCKBYTES
#define crypto_hashblocks_sha512_VERSION crypto_hashblocks_sha512_tweet_VERSION
#define crypto_hashblocks_sha512_IMPLEMENTATION "crypto_hashblocks/sha512/tweet"
#define crypto_hashblocks_sha256_tweet_STATEBYTES 32
#define crypto_hashblocks_sha256_tweet_BLOCKBYTES 64
extern int crypto_hashblocks_sha256_tweet(unsigned char *,const unsigned char *,unsigned long long);
#define crypto_hashblocks_sha256_tweet_VERSION "-"
#define crypto_hashblocks_sha256 crypto_hashblocks_sha256_tweet
#define crypto_hashblocks_sha256_STATEBYTES crypto_hashblocks_sha256_tweet_STATEBYTES
#define crypto_hashblocks_sha256_BLOCKBYTES crypto_hashblocks_sha256_tweet_BLOCKBYTES
#define crypto_hashblocks_sha256_VERSION crypto_hashblocks_sha256_tweet_VERSION
#define crypto_hashblocks_sha256_IMPLEMENTATION "crypto_hashblocks/sha256/tweet"
#define crypto_hash_PRIMITIVE "sha512"
#define crypto_hash crypto_hash_sha512
#define crypto_hash_BYTES crypto_hash_sha512_BYTES
#define crypto_hash_IMPLEMENTATION crypto_hash_sha512_IMPLEMENTATION
#define crypto_hash_VERSION crypto_hash_sha512_VERSION
#define crypto_hash_sha512_tweet_BYTES 64
extern int crypto_hash_sha512_tweet(unsigned char *,const unsigned char *,unsigned long long);
#define crypto_hash_sha512_tweet_VERSION "-"
#define crypto_hash_sha512 crypto_hash_sha512_tweet
#define crypto_hash_sha512_BYTES crypto_hash_sha512_tweet_BYTES
#define crypto_hash_sha512_VERSION crypto_hash_sha512_tweet_VERSION
#define crypto_hash_sha512_IMPLEMENTATION "crypto_hash/sha512/tweet"
#define crypto_hash_sha256_tweet_BYTES 32
extern int crypto_hash_sha256_tweet(unsigned char *,const unsigned char *,unsigned long long);
#define crypto_hash_sha256_tweet_VERSION "-"
#define crypto_hash_sha256 crypto_hash_sha256_tweet
#define crypto_hash_sha256_BYTES crypto_hash_sha256_tweet_BYTES
#define crypto_hash_sha256_VERSION crypto_hash_sha256_tweet_VERSION
#define crypto_hash_sha256_IMPLEMENTATION "crypto_hash/sha256/tweet"
#define crypto_onetimeauth_PRIMITIVE "poly1305"
#define crypto_onetimeauth crypto_onetimeauth_poly1305
#define crypto_onetimeauth_verify crypto_onetimeauth_poly1305_verify
#define crypto_onetimeauth_BYTES crypto_onetimeauth_poly1305_BYTES
#define crypto_onetimeauth_KEYBYTES crypto_onetimeauth_poly1305_KEYBYTES
#define crypto_onetimeauth_IMPLEMENTATION crypto_onetimeauth_poly1305_IMPLEMENTATION
#define crypto_onetimeauth_VERSION crypto_onetimeauth_poly1305_VERSION
#define crypto_onetimeauth_poly1305_tweet_BYTES 16
#define crypto_onetimeauth_poly1305_tweet_KEYBYTES 32
extern int crypto_onetimeauth_poly1305_tweet(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *);
extern int crypto_onetimeauth_poly1305_tweet_verify(const unsigned char *,const unsigned char *,unsigned long long,const unsigned char *);
#define crypto_onetimeauth_poly1305_tweet_VERSION "-"
#define crypto_onetimeauth_poly1305 crypto_onetimeauth_poly1305_tweet
#define crypto_onetimeauth_poly1305_verify crypto_onetimeauth_poly1305_tweet_verify
#define crypto_onetimeauth_poly1305_BYTES crypto_onetimeauth_poly1305_tweet_BYTES
#define crypto_onetimeauth_poly1305_KEYBYTES crypto_onetimeauth_poly1305_tweet_KEYBYTES
#define crypto_onetimeauth_poly1305_VERSION crypto_onetimeauth_poly1305_tweet_VERSION
#define crypto_onetimeauth_poly1305_IMPLEMENTATION "crypto_onetimeauth/poly1305/tweet"
#define crypto_scalarmult_PRIMITIVE "curve25519"
#define crypto_scalarmult crypto_scalarmult_curve25519
#define crypto_scalarmult_base crypto_scalarmult_curve25519_base
#define crypto_scalarmult_BYTES crypto_scalarmult_curve25519_BYTES
#define crypto_scalarmult_SCALARBYTES crypto_scalarmult_curve25519_SCALARBYTES
#define crypto_scalarmult_IMPLEMENTATION crypto_scalarmult_curve25519_IMPLEMENTATION
#define crypto_scalarmult_VERSION crypto_scalarmult_curve25519_VERSION
#define crypto_scalarmult_curve25519_tweet_BYTES 32
#define crypto_scalarmult_curve25519_tweet_SCALARBYTES 32
extern int crypto_scalarmult_curve25519_tweet(unsigned char *,const unsigned char *,const unsigned char *);
extern int crypto_scalarmult_curve25519_tweet_base(unsigned char *,const unsigned char *);
#define crypto_scalarmult_curve25519_tweet_VERSION "-"
#define crypto_scalarmult_curve25519 crypto_scalarmult_curve25519_tweet
#define crypto_scalarmult_curve25519_base crypto_scalarmult_curve25519_tweet_base
#define crypto_scalarmult_curve25519_BYTES crypto_scalarmult_curve25519_tweet_BYTES
#define crypto_scalarmult_curve25519_SCALARBYTES crypto_scalarmult_curve25519_tweet_SCALARBYTES
#define crypto_scalarmult_curve25519_VERSION crypto_scalarmult_curve25519_tweet_VERSION
#define crypto_scalarmult_curve25519_IMPLEMENTATION "crypto_scalarmult/curve25519/tweet"
#define crypto_secretbox_PRIMITIVE "xsalsa20poly1305"
#define crypto_secretbox crypto_secretbox_xsalsa20poly1305
#define crypto_secretbox_open crypto_secretbox_xsalsa20poly1305_open
#define crypto_secretbox_KEYBYTES crypto_secretbox_xsalsa20poly1305_KEYBYTES
#define crypto_secretbox_NONCEBYTES crypto_secretbox_xsalsa20poly1305_NONCEBYTES
#define crypto_secretbox_ZEROBYTES crypto_secretbox_xsalsa20poly1305_ZEROBYTES
#define crypto_secretbox_BOXZEROBYTES crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES
#define crypto_secretbox_IMPLEMENTATION crypto_secretbox_xsalsa20poly1305_IMPLEMENTATION
#define crypto_secretbox_VERSION crypto_secretbox_xsalsa20poly1305_VERSION
#define crypto_secretbox_xsalsa20poly1305_tweet_KEYBYTES 32
#define crypto_secretbox_xsalsa20poly1305_tweet_NONCEBYTES 24
#define crypto_secretbox_xsalsa20poly1305_tweet_ZEROBYTES 32
#define crypto_secretbox_xsalsa20poly1305_tweet_BOXZEROBYTES 16
extern int crypto_secretbox_xsalsa20poly1305_tweet(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
extern int crypto_secretbox_xsalsa20poly1305_tweet_open(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
#define crypto_secretbox_xsalsa20poly1305_tweet_VERSION "-"
#define crypto_secretbox_xsalsa20poly1305 crypto_secretbox_xsalsa20poly1305_tweet
#define crypto_secretbox_xsalsa20poly1305_open crypto_secretbox_xsalsa20poly1305_tweet_open
#define crypto_secretbox_xsalsa20poly1305_KEYBYTES crypto_secretbox_xsalsa20poly1305_tweet_KEYBYTES
#define crypto_secretbox_xsalsa20poly1305_NONCEBYTES crypto_secretbox_xsalsa20poly1305_tweet_NONCEBYTES
#define crypto_secretbox_xsalsa20poly1305_ZEROBYTES crypto_secretbox_xsalsa20poly1305_tweet_ZEROBYTES
#define crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES crypto_secretbox_xsalsa20poly1305_tweet_BOXZEROBYTES
#define crypto_secretbox_xsalsa20poly1305_VERSION crypto_secretbox_xsalsa20poly1305_tweet_VERSION
#define crypto_secretbox_xsalsa20poly1305_IMPLEMENTATION "crypto_secretbox/xsalsa20poly1305/tweet"
#define crypto_sign_PRIMITIVE "ed25519"
#define crypto_sign crypto_sign_ed25519
#define crypto_sign_open crypto_sign_ed25519_open
#define crypto_sign_keypair crypto_sign_ed25519_keypair
#define crypto_sign_BYTES crypto_sign_ed25519_BYTES
#define crypto_sign_PUBLICKEYBYTES crypto_sign_ed25519_PUBLICKEYBYTES
#define crypto_sign_SECRETKEYBYTES crypto_sign_ed25519_SECRETKEYBYTES
#define crypto_sign_IMPLEMENTATION crypto_sign_ed25519_IMPLEMENTATION
#define crypto_sign_VERSION crypto_sign_ed25519_VERSION
#define crypto_sign_ed25519_tweet_BYTES 64
#define crypto_sign_ed25519_tweet_PUBLICKEYBYTES 32
#define crypto_sign_ed25519_tweet_SECRETKEYBYTES 64
extern int crypto_sign_ed25519_tweet(unsigned char *,unsigned long long *,const unsigned char *,unsigned long long,const unsigned char *);
extern int crypto_sign_ed25519_tweet_open(unsigned char *,unsigned long long *,const unsigned char *,unsigned long long,const unsigned char *);
extern int crypto_sign_ed25519_tweet_keypair(unsigned char *,unsigned char *);
#define crypto_sign_ed25519_tweet_VERSION "-"
#define crypto_sign_ed25519 crypto_sign_ed25519_tweet
#define crypto_sign_ed25519_open crypto_sign_ed25519_tweet_open
#define crypto_sign_ed25519_keypair crypto_sign_ed25519_tweet_keypair
#define crypto_sign_ed25519_BYTES crypto_sign_ed25519_tweet_BYTES
#define crypto_sign_ed25519_PUBLICKEYBYTES crypto_sign_ed25519_tweet_PUBLICKEYBYTES
#define crypto_sign_ed25519_SECRETKEYBYTES crypto_sign_ed25519_tweet_SECRETKEYBYTES
#define crypto_sign_ed25519_VERSION crypto_sign_ed25519_tweet_VERSION
#define crypto_sign_ed25519_IMPLEMENTATION "crypto_sign/ed25519/tweet"
#define crypto_stream_PRIMITIVE "xsalsa20"
#define crypto_stream crypto_stream_xsalsa20
#define crypto_stream_xor crypto_stream_xsalsa20_xor
#define crypto_stream_KEYBYTES crypto_stream_xsalsa20_KEYBYTES
#define crypto_stream_NONCEBYTES crypto_stream_xsalsa20_NONCEBYTES
#define crypto_stream_IMPLEMENTATION crypto_stream_xsalsa20_IMPLEMENTATION
#define crypto_stream_VERSION crypto_stream_xsalsa20_VERSION
#define crypto_stream_xsalsa20_tweet_KEYBYTES 32
#define crypto_stream_xsalsa20_tweet_NONCEBYTES 24
extern int crypto_stream_xsalsa20_tweet(unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
extern int crypto_stream_xsalsa20_tweet_xor(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
#define crypto_stream_xsalsa20_tweet_VERSION "-"
#define crypto_stream_xsalsa20 crypto_stream_xsalsa20_tweet
#define crypto_stream_xsalsa20_xor crypto_stream_xsalsa20_tweet_xor
#define crypto_stream_xsalsa20_KEYBYTES crypto_stream_xsalsa20_tweet_KEYBYTES
#define crypto_stream_xsalsa20_NONCEBYTES crypto_stream_xsalsa20_tweet_NONCEBYTES
#define crypto_stream_xsalsa20_VERSION crypto_stream_xsalsa20_tweet_VERSION
#define crypto_stream_xsalsa20_IMPLEMENTATION "crypto_stream/xsalsa20/tweet"
#define crypto_stream_salsa20_tweet_KEYBYTES 32
#define crypto_stream_salsa20_tweet_NONCEBYTES 8
extern int crypto_stream_salsa20_tweet(unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
extern int crypto_stream_salsa20_tweet_xor(unsigned char *,const unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
#define crypto_stream_salsa20_tweet_VERSION "-"
#define crypto_stream_salsa20 crypto_stream_salsa20_tweet
#define crypto_stream_salsa20_xor crypto_stream_salsa20_tweet_xor
#define crypto_stream_salsa20_KEYBYTES crypto_stream_salsa20_tweet_KEYBYTES
#define crypto_stream_salsa20_NONCEBYTES crypto_stream_salsa20_tweet_NONCEBYTES
#define crypto_stream_salsa20_VERSION crypto_stream_salsa20_tweet_VERSION
#define crypto_stream_salsa20_IMPLEMENTATION "crypto_stream/salsa20/tweet"
#define crypto_verify_PRIMITIVE "16"
#define crypto_verify crypto_verify_16
#define crypto_verify_BYTES crypto_verify_16_BYTES
#define crypto_verify_IMPLEMENTATION crypto_verify_16_IMPLEMENTATION
#define crypto_verify_VERSION crypto_verify_16_VERSION
#define crypto_verify_16_tweet_BYTES 16
extern int crypto_verify_16_tweet(const unsigned char *,const unsigned char *);
#define crypto_verify_16_tweet_VERSION "-"
#define crypto_verify_16 crypto_verify_16_tweet
#define crypto_verify_16_BYTES crypto_verify_16_tweet_BYTES
#define crypto_verify_16_VERSION crypto_verify_16_tweet_VERSION
#define crypto_verify_16_IMPLEMENTATION "crypto_verify/16/tweet"
#define crypto_verify_32_tweet_BYTES 32
extern int crypto_verify_32_tweet(const unsigned char *,const unsigned char *);
#define crypto_verify_32_tweet_VERSION "-"
#define crypto_verify_32 crypto_verify_32_tweet
#define crypto_verify_32_BYTES crypto_verify_32_tweet_BYTES
#define crypto_verify_32_VERSION crypto_verify_32_tweet_VERSION
#define crypto_verify_32_IMPLEMENTATION "crypto_verify/32/tweet"
#endif








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#include "monocypher.h"

/////////////////
/// Utilities ///
/////////////////

// By default, EdDSA signatures use blake2b.  SHA-512 is provided as an
// option for full ed25519 compatibility. To use with SHA-512, compile
// with option -DED25519_SHA512 and provide the "sha512" header.
#ifdef ED25519_SHA512
    #define HASH crypto_sha512
#else
    #define HASH crypto_blake2b
#endif
#define COMBINE1(x, y) x ## y
#define COMBINE2(x, y) COMBINE1(x, y)
#define HASH_CTX    COMBINE2(HASH, _ctx)
#define HASH_INIT   COMBINE2(HASH, _init)
#define HASH_UPDATE COMBINE2(HASH, _update)
#define HASH_FINAL  COMBINE2(HASH, _final)

#define FOR(i, start, end)   for (size_t (i) = (start); (i) < (end); (i)++)
#define WIPE_CTX(ctx)        crypto_wipe(ctx   , sizeof(*(ctx)))
#define WIPE_BUFFER(buffer)  crypto_wipe(buffer, sizeof(buffer))
#define MIN(a, b)            ((a) <= (b) ? (a) : (b))
#define ALIGN(x, block_size) ((~(x) + 1) & ((block_size) - 1))
typedef int8_t   i8;
typedef uint8_t  u8;
typedef uint32_t u32;
typedef int32_t  i32;
typedef int64_t  i64;
typedef uint64_t u64;

static const u8 zero[128] = {0};

static u32 load24_le(const u8 s[3])
{
    return (u32)s[0]
        | ((u32)s[1] <<  8)
        | ((u32)s[2] << 16);
}

static u32 load32_le(const u8 s[4])
{
    return (u32)s[0]
        | ((u32)s[1] <<  8)
        | ((u32)s[2] << 16)
        | ((u32)s[3] << 24);
}

static u64 load64_le(const u8 s[8])
{
    return load32_le(s) | ((u64)load32_le(s+4) << 32);
}

static void store32_le(u8 out[4], u32 in)
{
    out[0] =  in        & 0xff;
    out[1] = (in >>  8) & 0xff;
    out[2] = (in >> 16) & 0xff;
    out[3] = (in >> 24) & 0xff;
}

static void store64_le(u8 out[8], u64 in)
{
    store32_le(out    , (u32)in );
    store32_le(out + 4, in >> 32);
}

static u64 rotr64(u64 x, u64 n) { return (x >> n) ^ (x << (64 - n)); }
static u32 rotl32(u32 x, u32 n) { return (x << n) ^ (x >> (32 - n)); }

static int neq0(u64 diff)
{   // constant time comparison to zero
    // return diff != 0 ? -1 : 0
    u64 half = (diff >> 32) | ((u32)diff);
    return (1 & ((half - 1) >> 32)) - 1;
}

static u64 x16(const u8 a[16], const u8 b[16])
{
    return (load64_le(a + 0) ^ load64_le(b + 0))
        |  (load64_le(a + 8) ^ load64_le(b + 8));
}
static u64 x32(const u8 a[16],const u8 b[16]){return x16(a,b)| x16(a+16, b+16);}
static u64 x64(const u8 a[64],const u8 b[64]){return x32(a,b)| x32(a+32, b+32);}
int crypto_verify16(const u8 a[16], const u8 b[16]){ return neq0(x16(a, b)); }
int crypto_verify32(const u8 a[32], const u8 b[32]){ return neq0(x32(a, b)); }
int crypto_verify64(const u8 a[64], const u8 b[64]){ return neq0(x64(a, b)); }

static int zerocmp32(const u8 p[32])
{
    return crypto_verify32(p, zero);
}

void crypto_wipe(void *secret, size_t size)
{
    volatile u8 *v_secret = (u8*)secret;
    FOR (i, 0, size) {
        v_secret[i] = 0;
    }
}

/////////////////
/// Chacha 20 ///
/////////////////
#define QUARTERROUND(a, b, c, d)     \
    a += b;  d = rotl32(d ^ a, 16);  \
    c += d;  b = rotl32(b ^ c, 12);  \
    a += b;  d = rotl32(d ^ a,  8);  \
    c += d;  b = rotl32(b ^ c,  7)

static void chacha20_rounds(u32 out[16], const u32 in[16])
{
    // The temporary variables make Chacha20 10% faster.
    u32 t0  = in[ 0];  u32 t1  = in[ 1];  u32 t2  = in[ 2];  u32 t3  = in[ 3];
    u32 t4  = in[ 4];  u32 t5  = in[ 5];  u32 t6  = in[ 6];  u32 t7  = in[ 7];
    u32 t8  = in[ 8];  u32 t9  = in[ 9];  u32 t10 = in[10];  u32 t11 = in[11];
    u32 t12 = in[12];  u32 t13 = in[13];  u32 t14 = in[14];  u32 t15 = in[15];

    FOR (i, 0, 10) { // 20 rounds, 2 rounds per loop.
        QUARTERROUND(t0, t4, t8 , t12); // column 0
        QUARTERROUND(t1, t5, t9 , t13); // column 1
        QUARTERROUND(t2, t6, t10, t14); // column 2
        QUARTERROUND(t3, t7, t11, t15); // column 3
        QUARTERROUND(t0, t5, t10, t15); // diagonal 0
        QUARTERROUND(t1, t6, t11, t12); // diagonal 1
        QUARTERROUND(t2, t7, t8 , t13); // diagonal 2
        QUARTERROUND(t3, t4, t9 , t14); // diagonal 3
    }
    out[ 0] = t0;   out[ 1] = t1;   out[ 2] = t2;   out[ 3] = t3;
    out[ 4] = t4;   out[ 5] = t5;   out[ 6] = t6;   out[ 7] = t7;
    out[ 8] = t8;   out[ 9] = t9;   out[10] = t10;  out[11] = t11;
    out[12] = t12;  out[13] = t13;  out[14] = t14;  out[15] = t15;
}

static void chacha20_init_key(crypto_chacha_ctx *ctx, const u8 key[32])
{
    // constant
    ctx->input[0] = load32_le((u8*)"expa");
    ctx->input[1] = load32_le((u8*)"nd 3");
    ctx->input[2] = load32_le((u8*)"2-by");
    ctx->input[3] = load32_le((u8*)"te k");
    // key
    FOR (i, 0, 8) {
        ctx->input[i+4] = load32_le(key + i*4);
    }
}

static u8 chacha20_pool_byte(crypto_chacha_ctx *ctx)
{
    u32 pool_word = ctx->pool[ctx->pool_idx >> 2];
    u8  pool_byte = pool_word >> (8*(ctx->pool_idx & 3));
    ctx->pool_idx++;
    return pool_byte;
}

// Fill the pool if needed, update the counters
static void chacha20_refill_pool(crypto_chacha_ctx *ctx)
{
    chacha20_rounds(ctx->pool, ctx->input);
    FOR (j, 0, 16) {
        ctx->pool[j] += ctx->input[j];
    }
    ctx->pool_idx = 0;
    ctx->input[12]++;
    if (ctx->input[12] == 0) {
        ctx->input[13]++;
    }
}

void crypto_chacha20_H(u8 out[32], const u8 key[32], const u8 in[16])
{
    crypto_chacha_ctx ctx;
    chacha20_init_key(&ctx, key);
    FOR (i, 0, 4) {
        ctx.input[i+12] = load32_le(in + i*4);
    }
    u32 buffer[16];
    chacha20_rounds(buffer, ctx.input);
    // prevents reversal of the rounds by revealing only half of the buffer.
    FOR (i, 0, 4) {
        store32_le(out      + i*4, buffer[i     ]); // constant
        store32_le(out + 16 + i*4, buffer[i + 12]); // counter and nonce
    }
    WIPE_CTX(&ctx);
    WIPE_BUFFER(buffer);
}

static void chacha20_encrypt(crypto_chacha_ctx *ctx,
                             u8                *cipher_text,
                             const u8          *plain_text,
                             size_t             text_size)
{
    FOR (i, 0, text_size) {
        if (ctx->pool_idx == 64) {
            chacha20_refill_pool(ctx);
        }
        u8 plain = 0;
        if (plain_text != 0) {
            plain = *plain_text;
            plain_text++;
        }
        *cipher_text = chacha20_pool_byte(ctx) ^ plain;
        cipher_text++;
    }
}

void crypto_chacha20_init(crypto_chacha_ctx *ctx,
                          const u8           key[32],
                          const u8           nonce[8])
{
    chacha20_init_key      (ctx, key);     // key
    crypto_chacha20_set_ctr(ctx, 0  );     // counter
    ctx->input[14] = load32_le(nonce + 0); // nonce
    ctx->input[15] = load32_le(nonce + 4); // nonce
}

void crypto_chacha20_x_init(crypto_chacha_ctx *ctx,
                            const u8           key[32],
                            const u8           nonce[24])
{
    u8 derived_key[32];
    crypto_chacha20_H(derived_key, key, nonce);
    crypto_chacha20_init(ctx, derived_key, nonce + 16);
    WIPE_BUFFER(derived_key);
}

void crypto_chacha20_set_ctr(crypto_chacha_ctx *ctx, u64 ctr)
{
    ctx->input[12] = ctr & 0xffffffff;
    ctx->input[13] = ctr >> 32;
    ctx->pool_idx  = 64;  // The random pool (re)starts empty
}

void crypto_chacha20_encrypt(crypto_chacha_ctx *ctx,
                             u8                *cipher_text,
                             const u8          *plain_text,
                             size_t             text_size)
{
    // Align ourselves with block boundaries
    size_t align = MIN(ALIGN(ctx->pool_idx, 64), text_size);
    chacha20_encrypt(ctx, cipher_text, plain_text, align);
    if (plain_text != 0) {
        plain_text += align;
    }
    cipher_text += align;
    text_size   -= align;

    // Process the message block by block
    FOR (i, 0, text_size >> 6) {  // number of blocks
        chacha20_refill_pool(ctx);
        if (plain_text != 0) {
            FOR (j, 0, 16) {
                u32 plain = load32_le(plain_text);
                store32_le(cipher_text, ctx->pool[j] ^ plain);
                plain_text  += 4;
                cipher_text += 4;
            }
        } else {
            FOR (j, 0, 16) {
                store32_le(cipher_text, ctx->pool[j]);
                cipher_text += 4;
            }
        }
        ctx->pool_idx = 64;
    }
    text_size &= 63;

    // remaining bytes
    chacha20_encrypt(ctx, cipher_text, plain_text, text_size);
}

void crypto_chacha20_stream(crypto_chacha_ctx *ctx,
                            uint8_t *stream, size_t size)
{
    crypto_chacha20_encrypt(ctx, stream, 0, size);
}


/////////////////
/// Poly 1305 ///
/////////////////

// h = (h + c) * r
// preconditions:
//   ctx->h <= 4_ffffffff_ffffffff_ffffffff_ffffffff
//   ctx->c <= 1_ffffffff_ffffffff_ffffffff_ffffffff
//   ctx->r <=   0ffffffc_0ffffffc_0ffffffc_0fffffff
// Postcondition:
//   ctx->h <= 4_ffffffff_ffffffff_ffffffff_ffffffff
static void poly_block(crypto_poly1305_ctx *ctx)
{
    // s = h + c, without carry propagation
    const u64 s0 = ctx->h[0] + (u64)ctx->c[0]; // s0 <= 1_fffffffe
    const u64 s1 = ctx->h[1] + (u64)ctx->c[1]; // s1 <= 1_fffffffe
    const u64 s2 = ctx->h[2] + (u64)ctx->c[2]; // s2 <= 1_fffffffe
    const u64 s3 = ctx->h[3] + (u64)ctx->c[3]; // s3 <= 1_fffffffe
    const u32 s4 = ctx->h[4] +      ctx->c[4]; // s4 <=          5

    // Local all the things!
    const u32 r0 = ctx->r[0];       // r0  <= 0fffffff
    const u32 r1 = ctx->r[1];       // r1  <= 0ffffffc
    const u32 r2 = ctx->r[2];       // r2  <= 0ffffffc
    const u32 r3 = ctx->r[3];       // r3  <= 0ffffffc
    const u32 rr0 = (r0 >> 2) * 5;  // rr0 <= 13fffffb // lose 2 bits...
    const u32 rr1 = (r1 >> 2) + r1; // rr1 <= 13fffffb // rr1 == (r1 >> 2) * 5
    const u32 rr2 = (r2 >> 2) + r2; // rr2 <= 13fffffb // rr1 == (r2 >> 2) * 5
    const u32 rr3 = (r3 >> 2) + r3; // rr3 <= 13fffffb // rr1 == (r3 >> 2) * 5

    // (h + c) * r, without carry propagation
    const u64 x0 = s0*r0 + s1*rr3 + s2*rr2 + s3*rr1 +s4*rr0;//<=97ffffe007fffff8
    const u64 x1 = s0*r1 + s1*r0  + s2*rr3 + s3*rr2 +s4*rr1;//<=8fffffe20ffffff6
    const u64 x2 = s0*r2 + s1*r1  + s2*r0  + s3*rr3 +s4*rr2;//<=87ffffe417fffff4
    const u64 x3 = s0*r3 + s1*r2  + s2*r1  + s3*r0  +s4*rr3;//<=7fffffe61ffffff2
    const u32 x4 = s4 * (r0 & 3); // ...recover 2 bits      //<=               f

    // partial reduction modulo 2^130 - 5
    const u32 u5 = x4 + (x3 >> 32); // u5 <= 7ffffff5
    const u64 u0 = (u5 >>  2) * 5 + (x0 & 0xffffffff);
    const u64 u1 = (u0 >> 32)     + (x1 & 0xffffffff) + (x0 >> 32);
    const u64 u2 = (u1 >> 32)     + (x2 & 0xffffffff) + (x1 >> 32);
    const u64 u3 = (u2 >> 32)     + (x3 & 0xffffffff) + (x2 >> 32);
    const u64 u4 = (u3 >> 32)     + (u5 & 3);

    // Update the hash
    ctx->h[0] = u0 & 0xffffffff; // u0 <= 1_9ffffff0
    ctx->h[1] = u1 & 0xffffffff; // u1 <= 1_97ffffe0
    ctx->h[2] = u2 & 0xffffffff; // u2 <= 1_8fffffe2
    ctx->h[3] = u3 & 0xffffffff; // u3 <= 1_87ffffe4
    ctx->h[4] = (u32)u4;         // u4 <=          4
}

// (re-)initializes the input counter and input buffer
static void poly_clear_c(crypto_poly1305_ctx *ctx)
{
    ctx->c[0]  = 0;
    ctx->c[1]  = 0;
    ctx->c[2]  = 0;
    ctx->c[3]  = 0;
    ctx->c_idx = 0;
}

static void poly_take_input(crypto_poly1305_ctx *ctx, u8 input)
{
    size_t word = ctx->c_idx >> 2;
    size_t byte = ctx->c_idx & 3;
    ctx->c[word] |= (u32)input << (byte * 8);
    ctx->c_idx++;
}

static void poly_update(crypto_poly1305_ctx *ctx,
                        const u8 *message, size_t message_size)
{
    FOR (i, 0, message_size) {
        poly_take_input(ctx, message[i]);
        if (ctx->c_idx == 16) {
            poly_block(ctx);
            poly_clear_c(ctx);
        }
    }
}

void crypto_poly1305_init(crypto_poly1305_ctx *ctx, const u8 key[32])
{
    // Initial hash is zero
    FOR (i, 0, 5) {
        ctx->h[i] = 0;
    }
    // add 2^130 to every input block
    ctx->c[4] = 1;
    poly_clear_c(ctx);
    // load r and pad (r has some of its bits cleared)
    FOR (i, 0, 1) { ctx->r  [0] = load32_le(key           ) & 0x0fffffff; }
    FOR (i, 1, 4) { ctx->r  [i] = load32_le(key + i*4     ) & 0x0ffffffc; }
    FOR (i, 0, 4) { ctx->pad[i] = load32_le(key + i*4 + 16);              }
}

void crypto_poly1305_update(crypto_poly1305_ctx *ctx,
                            const u8 *message, size_t message_size)
{
    // Align ourselves with block boundaries
    size_t align = MIN(ALIGN(ctx->c_idx, 16), message_size);
    poly_update(ctx, message, align);
    message      += align;
    message_size -= align;

    // Process the message block by block
    size_t nb_blocks = message_size >> 4;
    FOR (i, 0, nb_blocks) {
        ctx->c[0] = load32_le(message +  0);
        ctx->c[1] = load32_le(message +  4);
        ctx->c[2] = load32_le(message +  8);
        ctx->c[3] = load32_le(message + 12);
        poly_block(ctx);
        message += 16;
    }
    if (nb_blocks > 0) {
        poly_clear_c(ctx);
    }
    message_size &= 15;

    // remaining bytes
    poly_update(ctx, message, message_size);
}

void crypto_poly1305_final(crypto_poly1305_ctx *ctx, u8 mac[16])
{
    // Process the last block (if any)
    if (ctx->c_idx != 0) {
        // move the final 1 according to remaining input length
        // (We may add less than 2^130 to the last input block)
        ctx->c[4] = 0;
        poly_take_input(ctx, 1);
        // one last hash update
        poly_block(ctx);
    }

    // check if we should subtract 2^130-5 by performing the
    // corresponding carry propagation.
    const u64 u0 = (u64)5     + ctx->h[0]; // <= 1_00000004
    const u64 u1 = (u0 >> 32) + ctx->h[1]; // <= 1_00000000
    const u64 u2 = (u1 >> 32) + ctx->h[2]; // <= 1_00000000
    const u64 u3 = (u2 >> 32) + ctx->h[3]; // <= 1_00000000
    const u64 u4 = (u3 >> 32) + ctx->h[4]; // <=          5
    // u4 indicates how many times we should subtract 2^130-5 (0 or 1)

    // h + pad, minus 2^130-5 if u4 exceeds 3
    const u64 uu0 = (u4 >> 2) * 5 + ctx->h[0] + ctx->pad[0]; // <= 2_00000003
    const u64 uu1 = (uu0 >> 32)   + ctx->h[1] + ctx->pad[1]; // <= 2_00000000
    const u64 uu2 = (uu1 >> 32)   + ctx->h[2] + ctx->pad[2]; // <= 2_00000000
    const u64 uu3 = (uu2 >> 32)   + ctx->h[3] + ctx->pad[3]; // <= 2_00000000

    store32_le(mac     , (u32)uu0);
    store32_le(mac +  4, (u32)uu1);
    store32_le(mac +  8, (u32)uu2);
    store32_le(mac + 12, (u32)uu3);

    WIPE_CTX(ctx);
}

void crypto_poly1305(u8     mac[16],  const u8 *message,
                     size_t message_size, const u8  key[32])
{
    crypto_poly1305_ctx ctx;
    crypto_poly1305_init  (&ctx, key);
    crypto_poly1305_update(&ctx, message, message_size);
    crypto_poly1305_final (&ctx, mac);
}

////////////////
/// Blake2 b ///
////////////////
static const u64 iv[8] = {
    0x6a09e667f3bcc908, 0xbb67ae8584caa73b,
    0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1,
    0x510e527fade682d1, 0x9b05688c2b3e6c1f,
    0x1f83d9abfb41bd6b, 0x5be0cd19137e2179,
};

// increment the input offset
static void blake2b_incr(crypto_blake2b_ctx *ctx)
{
    u64   *x = ctx->input_offset;
    size_t y = ctx->input_idx;
    x[0] += y;
    if (x[0] < y) {
        x[1]++;
    }
}

static void blake2b_compress(crypto_blake2b_ctx *ctx, int is_last_block)
{
    static const u8 sigma[12][16] = {
        {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 },
        { 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 },
        { 11,  8, 12,  0,  5,  2, 15, 13, 10, 14,  3,  6,  7,  1,  9,  4 },
        {  7,  9,  3,  1, 13, 12, 11, 14,  2,  6,  5, 10,  4,  0, 15,  8 },
        {  9,  0,  5,  7,  2,  4, 10, 15, 14,  1, 11, 12,  6,  8,  3, 13 },
        {  2, 12,  6, 10,  0, 11,  8,  3,  4, 13,  7,  5, 15, 14,  1,  9 },
        { 12,  5,  1, 15, 14, 13,  4, 10,  0,  7,  6,  3,  9,  2,  8, 11 },
        { 13, 11,  7, 14, 12,  1,  3,  9,  5,  0, 15,  4,  8,  6,  2, 10 },
        {  6, 15, 14,  9, 11,  3,  0,  8, 12,  2, 13,  7,  1,  4, 10,  5 },
        { 10,  2,  8,  4,  7,  6,  1,  5, 15, 11,  9, 14,  3, 12, 13,  0 },
    };

    // init work vector
    u64 v0 = ctx->hash[0];  u64 v8  = iv[0];
    u64 v1 = ctx->hash[1];  u64 v9  = iv[1];
    u64 v2 = ctx->hash[2];  u64 v10 = iv[2];
    u64 v3 = ctx->hash[3];  u64 v11 = iv[3];
    u64 v4 = ctx->hash[4];  u64 v12 = iv[4] ^ ctx->input_offset[0];
    u64 v5 = ctx->hash[5];  u64 v13 = iv[5] ^ ctx->input_offset[1];
    u64 v6 = ctx->hash[6];  u64 v14 = iv[6] ^ is_last_block;
    u64 v7 = ctx->hash[7];  u64 v15 = iv[7];

    // mangle work vector
    uint64_t *input = ctx->input;
#define BLAKE2_G(v, a, b, c, d, x, y)                  \
    v##a += v##b + x;  v##d = rotr64(v##d ^ v##a, 32); \
    v##c += v##d;      v##b = rotr64(v##b ^ v##c, 24); \
    v##a += v##b + y;  v##d = rotr64(v##d ^ v##a, 16); \
    v##c += v##d;      v##b = rotr64(v##b ^ v##c, 63);
#define BLAKE2_ROUND(i)                                                 \
    BLAKE2_G(v, 0, 4,  8, 12, input[sigma[i][ 0]], input[sigma[i][ 1]]);\
    BLAKE2_G(v, 1, 5,  9, 13, input[sigma[i][ 2]], input[sigma[i][ 3]]);\
    BLAKE2_G(v, 2, 6, 10, 14, input[sigma[i][ 4]], input[sigma[i][ 5]]);\
    BLAKE2_G(v, 3, 7, 11, 15, input[sigma[i][ 6]], input[sigma[i][ 7]]);\
    BLAKE2_G(v, 0, 5, 10, 15, input[sigma[i][ 8]], input[sigma[i][ 9]]);\
    BLAKE2_G(v, 1, 6, 11, 12, input[sigma[i][10]], input[sigma[i][11]]);\
    BLAKE2_G(v, 2, 7,  8, 13, input[sigma[i][12]], input[sigma[i][13]]);\
    BLAKE2_G(v, 3, 4,  9, 14, input[sigma[i][14]], input[sigma[i][15]])

    BLAKE2_ROUND(0);  BLAKE2_ROUND(1);  BLAKE2_ROUND(2);  BLAKE2_ROUND(3);
    BLAKE2_ROUND(4);  BLAKE2_ROUND(5);  BLAKE2_ROUND(6);  BLAKE2_ROUND(7);
    BLAKE2_ROUND(8);  BLAKE2_ROUND(9);  BLAKE2_ROUND(0);  BLAKE2_ROUND(1);

    // update hash
    ctx->hash[0] ^= v0 ^ v8;
    ctx->hash[1] ^= v1 ^ v9;
    ctx->hash[2] ^= v2 ^ v10;
    ctx->hash[3] ^= v3 ^ v11;
    ctx->hash[4] ^= v4 ^ v12;
    ctx->hash[5] ^= v5 ^ v13;
    ctx->hash[6] ^= v6 ^ v14;
    ctx->hash[7] ^= v7 ^ v15;
}

static void blake2b_set_input(crypto_blake2b_ctx *ctx, u8 input, size_t index)
{
    if (index == 0) {
        FOR (i, 0, 16) {
            ctx->input[i] = 0;
        }
    }
    size_t word = index >> 3;
    size_t byte = index & 7;
    ctx->input[word] |= (u64)input << (byte << 3);

}

static void blake2b_end_block(crypto_blake2b_ctx *ctx)
{
    if (ctx->input_idx == 128) {  // If buffer is full,
        blake2b_incr(ctx);        // update the input offset
        blake2b_compress(ctx, 0); // and compress the (not last) block
        ctx->input_idx = 0;
    }
}

static void blake2b_update(crypto_blake2b_ctx *ctx,
                           const u8 *message, size_t message_size)
{
    FOR (i, 0, message_size) {
        blake2b_end_block(ctx);
        blake2b_set_input(ctx, message[i], ctx->input_idx);
        ctx->input_idx++;
    }
}

void crypto_blake2b_general_init(crypto_blake2b_ctx *ctx, size_t hash_size,
                                 const u8           *key, size_t key_size)
{
    // initial hash
    FOR (i, 0, 8) {
        ctx->hash[i] = iv[i];
    }
    ctx->hash[0] ^= 0x01010000 ^ (key_size << 8) ^ hash_size;

    ctx->input_offset[0] = 0;         // begining of the input, no offset
    ctx->input_offset[1] = 0;         // begining of the input, no offset
    ctx->hash_size       = hash_size; // remember the hash size we want
    ctx->input_idx       = 0;

    // if there is a key, the first block is that key (padded with zeroes)
    if (key_size > 0) {
        crypto_blake2b_update(ctx, key ,       key_size);
        crypto_blake2b_update(ctx, zero, 128 - key_size);
    }
}

void crypto_blake2b_init(crypto_blake2b_ctx *ctx)
{
    crypto_blake2b_general_init(ctx, 64, 0, 0);
}

void crypto_blake2b_update(crypto_blake2b_ctx *ctx,
                           const u8 *message, size_t message_size)
{
    // Align ourselves with block boundaries
    size_t align = MIN(ALIGN(ctx->input_idx, 128), message_size);
    blake2b_update(ctx, message, align);
    message      += align;
    message_size -= align;

    // Process the message block by block
    FOR (i, 0, message_size >> 7) { // number of blocks
        blake2b_end_block(ctx);
        FOR (j, 0, 16) {
            ctx->input[j] = load64_le(message + j*8);
        }
        message += 128;
        ctx->input_idx = 128;
    }
    message_size &= 127;

    // remaining bytes
    blake2b_update(ctx, message, message_size);
}

void crypto_blake2b_final(crypto_blake2b_ctx *ctx, u8 *hash)
{
    // Pad the end of the block with zeroes
    FOR (i, ctx->input_idx, 128) {
        blake2b_set_input(ctx, 0, i);
    }
    blake2b_incr(ctx);         // update the input offset
    blake2b_compress(ctx, -1); // compress the last block
    size_t nb_words = ctx->hash_size >> 3;
    FOR (i, 0, nb_words) {
        store64_le(hash + i*8, ctx->hash[i]);
    }
    FOR (i, nb_words * 8, ctx->hash_size) {
        hash[i] = (ctx->hash[i >> 3] >> (8 * (i & 7))) & 0xff;
    }
    WIPE_CTX(ctx);
}

void crypto_blake2b_general(u8       *hash   , size_t hash_size,
                            const u8 *key    , size_t key_size,
                            const u8 *message, size_t message_size)
{
    crypto_blake2b_ctx ctx;
    crypto_blake2b_general_init(&ctx, hash_size, key, key_size);
    crypto_blake2b_update(&ctx, message, message_size);
    crypto_blake2b_final(&ctx, hash);
}

void crypto_blake2b(u8 hash[64], const u8 *message, size_t message_size)
{
    crypto_blake2b_general(hash, 64, 0, 0, message, message_size);
}


////////////////
/// Argon2 i ///
////////////////
// references to R, Z, Q etc. come from the spec

// Argon2 operates on 1024 byte blocks.
typedef struct { u64 a[128]; } block;

static void wipe_block(block *b)
{
    volatile u64* a = b->a;
    FOR (i, 0, 128) {
        a[i] = 0;
    }
}

// updates a blake2 hash with a 32 bit word, little endian.
static void blake_update_32(crypto_blake2b_ctx *ctx, u32 input)
{
    u8 buf[4];
    store32_le(buf, input);
    crypto_blake2b_update(ctx, buf, 4);
    WIPE_BUFFER(buf);
}

static void load_block(block *b, const u8 bytes[1024])
{
    FOR (i, 0, 128) {
        b->a[i] = load64_le(bytes + i*8);
    }
}

static void store_block(u8 bytes[1024], const block *b)
{
    FOR (i, 0, 128) {
        store64_le(bytes + i*8, b->a[i]);
    }
}

static void copy_block(block *o,const block*in){FOR(i,0,128)o->a[i] = in->a[i];}
static void  xor_block(block *o,const block*in){FOR(i,0,128)o->a[i]^= in->a[i];}

// Hash with a virtually unlimited digest size.
// Doesn't extract more entropy than the base hash function.
// Mainly used for filling a whole kilobyte block with pseudo-random bytes.
// (One could use a stream cipher with a seed hash as the key, but
//  this would introduce another dependency —and point of failure.)
static void extended_hash(u8       *digest, u32 digest_size,
                          const u8 *input , u32 input_size)
{
    crypto_blake2b_ctx ctx;
    crypto_blake2b_general_init(&ctx, MIN(digest_size, 64), 0, 0);
    blake_update_32            (&ctx, digest_size);
    crypto_blake2b_update      (&ctx, input, input_size);
    crypto_blake2b_final       (&ctx, digest);

    if (digest_size > 64) {
        // the conversion to u64 avoids integer overflow on
        // ludicrously big hash sizes.
        u32 r   = (((u64)digest_size + 31) >> 5) - 2;
        u32 i   =  1;
        u32 in  =  0;
        u32 out = 32;
        while (i < r) {
            // Input and output overlap. This is intentional
            crypto_blake2b(digest + out, digest + in, 64);
            i   +=  1;
            in  += 32;
            out += 32;
        }
        crypto_blake2b_general(digest + out, digest_size - (32 * r),
                               0, 0, // no key
                               digest + in , 64);
    }
}

#define LSB(x) ((x) & 0xffffffff)
#define G(a, b, c, d)                                            \
    a += b + 2 * LSB(a) * LSB(b);  d ^= a;  d = rotr64(d, 32);   \
    c += d + 2 * LSB(c) * LSB(d);  b ^= c;  b = rotr64(b, 24);   \
    a += b + 2 * LSB(a) * LSB(b);  d ^= a;  d = rotr64(d, 16);   \
    c += d + 2 * LSB(c) * LSB(d);  b ^= c;  b = rotr64(b, 63)
#define ROUND(v0,  v1,  v2,  v3,  v4,  v5,  v6,  v7,    \
              v8,  v9, v10, v11, v12, v13, v14, v15)    \
    G(v0, v4,  v8, v12);  G(v1, v5,  v9, v13);          \
    G(v2, v6, v10, v14);  G(v3, v7, v11, v15);          \
    G(v0, v5, v10, v15);  G(v1, v6, v11, v12);          \
    G(v2, v7,  v8, v13);  G(v3, v4,  v9, v14)

// Core of the compression function G.  Computes Z from R in place.
static void g_rounds(block *work_block)
{
    // column rounds (work_block = Q)
    for (int i = 0; i < 128; i += 16) {
        ROUND(work_block->a[i     ], work_block->a[i +  1],
              work_block->a[i +  2], work_block->a[i +  3],
              work_block->a[i +  4], work_block->a[i +  5],
              work_block->a[i +  6], work_block->a[i +  7],
              work_block->a[i +  8], work_block->a[i +  9],
              work_block->a[i + 10], work_block->a[i + 11],
              work_block->a[i + 12], work_block->a[i + 13],
              work_block->a[i + 14], work_block->a[i + 15]);
    }
    // row rounds (work_block = Z)
    for (int i = 0; i < 16; i += 2) {
        ROUND(work_block->a[i      ], work_block->a[i +   1],
              work_block->a[i +  16], work_block->a[i +  17],
              work_block->a[i +  32], work_block->a[i +  33],
              work_block->a[i +  48], work_block->a[i +  49],
              work_block->a[i +  64], work_block->a[i +  65],
              work_block->a[i +  80], work_block->a[i +  81],
              work_block->a[i +  96], work_block->a[i +  97],
              work_block->a[i + 112], work_block->a[i + 113]);
    }
}

// The compression function G (copy version for the first pass)
static void g_copy(block *result, const block *x, const block *y, block* tmp)
{
    copy_block(tmp   , x  ); // tmp    = X
    xor_block (tmp   , y  ); // tmp    = X ^ Y = R
    copy_block(result, tmp); // result = R         (only difference with g_xor)
    g_rounds  (tmp);         // tmp    = Z
    xor_block (result, tmp); // result = R ^ Z
}

// The compression function G (xor version for subsequent passes)
static void g_xor(block *result, const block *x, const block *y, block *tmp)
{
    copy_block(tmp   , x  ); // tmp    = X
    xor_block (tmp   , y  ); // tmp    = X ^ Y = R
    xor_block (result, tmp); // result = R ^ old   (only difference with g_copy)
    g_rounds  (tmp);         // tmp    = Z
    xor_block (result, tmp); // result = R ^ old ^ Z
}

// unary version of the compression function.
// The missing argument is implied zero.
// Does the transformation in place.
static void unary_g(block *work_block)
{
    // work_block == R
    block tmp;
    copy_block(&tmp, work_block); // tmp        = R
    g_rounds(work_block);         // work_block = Z
    xor_block(work_block, &tmp);  // work_block = Z ^ R
    wipe_block(&tmp);
}

// Argon2i uses a kind of stream cipher to determine which reference
// block it will take to synthesise the next block.  This context hold
// that stream's state.  (It's very similar to Chacha20.  The block b
// is anologous to Chacha's own pool)
typedef struct {
    block b;
    u32 pass_number;
    u32 slice_number;
    u32 nb_blocks;
    u32 nb_iterations;
    u32 ctr;
    u32 offset;
} gidx_ctx;

// The block in the context will determine array indices. To avoid
// timing attacks, it only depends on public information.  No looking
// at a previous block to seed the next.  This makes offline attacks
// easier, but timing attacks are the bigger threat in many settings.
static void gidx_refresh(gidx_ctx *ctx)
{
    // seed the begining of the block...
    ctx->b.a[0] = ctx->pass_number;
    ctx->b.a[1] = 0;  // lane number (we have only one)
    ctx->b.a[2] = ctx->slice_number;
    ctx->b.a[3] = ctx->nb_blocks;
    ctx->b.a[4] = ctx->nb_iterations;
    ctx->b.a[5] = 1;  // type: Argon2i
    ctx->b.a[6] = ctx->ctr;
    FOR (i, 7, 128) { ctx->b.a[i] = 0; } // ...then zero the rest out

    // Shuffle the block thus: ctx->b = G((G(ctx->b, zero)), zero)
    // (G "square" function), to get cheap pseudo-random numbers.
    unary_g(&ctx->b);
    unary_g(&ctx->b);
}

static void gidx_init(gidx_ctx *ctx,
                      u32 pass_number, u32 slice_number,
                      u32 nb_blocks,   u32 nb_iterations)
{
    ctx->pass_number   = pass_number;
    ctx->slice_number  = slice_number;
    ctx->nb_blocks     = nb_blocks;
    ctx->nb_iterations = nb_iterations;
    ctx->ctr           = 0;

    // Offset from the begining of the segment.  For the first slice
    // of the first pass, we start at the *third* block, so the offset
    // starts at 2, not 0.
    if (pass_number != 0 || slice_number != 0) {
        ctx->offset = 0;
    } else {
        ctx->offset = 2;
        ctx->ctr++;         // Compensates for missed lazy creation
        gidx_refresh(ctx);  // at the start of gidx_next()
    }
}

static u32 gidx_next(gidx_ctx *ctx)
{
    // lazily creates the offset block we need
    if ((ctx->offset & 127) == 0) {
        ctx->ctr++;
        gidx_refresh(ctx);
    }
    u32 index  = ctx->offset & 127; // save index  for current call
    u32 offset = ctx->offset;       // save offset for current call
    ctx->offset++;                  // update offset for next call

    // Computes the area size.
    // Pass 0 : all already finished segments plus already constructed
    //          blocks in this segment
    // Pass 1+: 3 last segments plus already constructed
    //          blocks in this segment.  THE SPEC SUGGESTS OTHERWISE.
    //          I CONFORM TO THE REFERENCE IMPLEMENTATION.
    int first_pass  = ctx->pass_number == 0;
    u32 slice_size  = ctx->nb_blocks >> 2;
    u32 nb_segments = first_pass ? ctx->slice_number : 3;
    u32 area_size   = nb_segments * slice_size + offset - 1;

    // Computes the starting position of the reference area.
    // CONTRARY TO WHAT THE SPEC SUGGESTS, IT STARTS AT THE
    // NEXT SEGMENT, NOT THE NEXT BLOCK.
    u32 next_slice = ((ctx->slice_number + 1) & 3) * slice_size;
    u32 start_pos  = first_pass ? 0 : next_slice;

    // Generate offset from J1 (no need for J2, there's only one lane)
    u64 j1         = ctx->b.a[index] & 0xffffffff; // pseudo-random number
    u64 x          = (j1 * j1)       >> 32;
    u64 y          = (area_size * x) >> 32;
    u64 z          = (area_size - 1) - y;
    return (start_pos + z) % ctx->nb_blocks;
}

// Main algorithm
void crypto_argon2i_general(u8       *hash,      u32 hash_size,
                            void     *work_area, u32 nb_blocks,
                            u32 nb_iterations,
                            const u8 *password,  u32 password_size,
                            const u8 *salt,      u32 salt_size,
                            const u8 *key,       u32 key_size,
                            const u8 *ad,        u32 ad_size)
{
    // work area seen as blocks (must be suitably aligned)
    block *blocks = (block*)work_area;
    {
        crypto_blake2b_ctx ctx;
        crypto_blake2b_init(&ctx);

        blake_update_32      (&ctx, 1            ); // p: number of threads
        blake_update_32      (&ctx, hash_size    );
        blake_update_32      (&ctx, nb_blocks    );
        blake_update_32      (&ctx, nb_iterations);
        blake_update_32      (&ctx, 0x13         ); // v: version number
        blake_update_32      (&ctx, 1            ); // y: Argon2i
        blake_update_32      (&ctx,           password_size);
        crypto_blake2b_update(&ctx, password, password_size);
        blake_update_32      (&ctx,           salt_size);
        crypto_blake2b_update(&ctx, salt,     salt_size);
        blake_update_32      (&ctx,           key_size);
        crypto_blake2b_update(&ctx, key,      key_size);
        blake_update_32      (&ctx,           ad_size);
        crypto_blake2b_update(&ctx, ad,       ad_size);

        u8 initial_hash[72]; // 64 bytes plus 2 words for future hashes
        crypto_blake2b_final(&ctx, initial_hash);

        // fill first 2 blocks
        block tmp_block;
        u8    hash_area[1024];
        store32_le(initial_hash + 64, 0); // first  additional word
        store32_le(initial_hash + 68, 0); // second additional word
        extended_hash(hash_area, 1024, initial_hash, 72);
        load_block(&tmp_block, hash_area);
        copy_block(blocks, &tmp_block);

        store32_le(initial_hash + 64, 1); // slight modification
        extended_hash(hash_area, 1024, initial_hash, 72);
        load_block(&tmp_block, hash_area);
        copy_block(blocks + 1, &tmp_block);

        WIPE_BUFFER(initial_hash);
        WIPE_BUFFER(hash_area);
        wipe_block(&tmp_block);
    }

    // Actual number of blocks
    nb_blocks -= nb_blocks & 3; // round down to 4 p (p == 1 thread)
    const u32 segment_size = nb_blocks >> 2;

    // fill (then re-fill) the rest of the blocks
    block tmp;
    gidx_ctx ctx;
    FOR (pass_number, 0, nb_iterations) {
        int first_pass = pass_number == 0;

        FOR (segment, 0, 4) {
            gidx_init(&ctx, (u32)pass_number, (u32)segment,
                      nb_blocks, nb_iterations);

            // On the first segment of the first pass,
            // blocks 0 and 1 are already filled.
            // We use the offset to skip them.
            u32 start_offset  = first_pass && segment == 0 ? 2 : 0;
            u32 segment_start = (u32)segment * segment_size + start_offset;
            u32 segment_end   = ((u32)segment + 1) * segment_size;
            FOR (current_block, segment_start, segment_end) {
                u32 reference_block = gidx_next(&ctx);
                u32 previous_block  = current_block == 0
                                    ? nb_blocks - 1
                                    : (u32)current_block - 1;
                block *c = blocks + current_block;
                block *p = blocks + previous_block;
                block *r = blocks + reference_block;
                if (first_pass) { g_copy(c, p, r, &tmp); }
                else            { g_xor (c, p, r, &tmp); }
            }
        }
    }
    wipe_block(&ctx.b);
    wipe_block(&tmp);
    // hash the very last block with H' into the output hash
    u8 final_block[1024];
    store_block(final_block, blocks + (nb_blocks - 1));
    extended_hash(hash, hash_size, final_block, 1024);
    WIPE_BUFFER(final_block);

    // wipe work area
    volatile u64 *p = (u64*)work_area;
    FOR (i, 0, 128 * nb_blocks) {
        p[i] = 0;
    }
}

void crypto_argon2i(u8       *hash,      u32 hash_size,
                    void     *work_area, u32 nb_blocks,
                    u32 nb_iterations,
                    const u8 *password,  u32 password_size,
                    const u8 *salt,      u32 salt_size)
{
    crypto_argon2i_general(hash, hash_size,
                           work_area, nb_blocks, nb_iterations,
                           password, password_size,
                           salt    , salt_size,
                           0, 0, 0, 0);
}



////////////////////////////////////
/// Arithmetic modulo 2^255 - 19 ///
////////////////////////////////////
//  Taken from Supercop's ref10 implementation.
//  A bit bigger than TweetNaCl, over 4 times faster.

// field element
typedef i32 fe[10];

static void fe_0(fe h) {            FOR(i, 0, 10) h[i] = 0; }
static void fe_1(fe h) { h[0] = 1;  FOR(i, 1, 10) h[i] = 0; }

static void fe_copy(fe h,const fe f           ){FOR(i,0,10) h[i] =  f[i];      }
static void fe_neg (fe h,const fe f           ){FOR(i,0,10) h[i] = -f[i];      }
static void fe_add (fe h,const fe f,const fe g){FOR(i,0,10) h[i] = f[i] + g[i];}
static void fe_sub (fe h,const fe f,const fe g){FOR(i,0,10) h[i] = f[i] - g[i];}

static void fe_cswap(fe f, fe g, int b)
{
    FOR (i, 0, 10) {
        i32 x = (f[i] ^ g[i]) & -b;
        f[i] = f[i] ^ x;
        g[i] = g[i] ^ x;
    }
}

static void fe_ccopy(fe f, const fe g, int b)
{
    FOR (i, 0, 10) {
        i32 x = (f[i] ^ g[i]) & -b;
        f[i] = f[i] ^ x;
    }
}

#define FE_CARRY                                                        \
    i64 c0, c1, c2, c3, c4, c5, c6, c7, c8, c9;                         \
    c9 = (t9 + (i64) (1<<24)) >> 25; t0 += c9 * 19; t9 -= c9 * (1 << 25); \
    c1 = (t1 + (i64) (1<<24)) >> 25; t2 += c1;      t1 -= c1 * (1 << 25); \
    c3 = (t3 + (i64) (1<<24)) >> 25; t4 += c3;      t3 -= c3 * (1 << 25); \
    c5 = (t5 + (i64) (1<<24)) >> 25; t6 += c5;      t5 -= c5 * (1 << 25); \
    c7 = (t7 + (i64) (1<<24)) >> 25; t8 += c7;      t7 -= c7 * (1 << 25); \
    c0 = (t0 + (i64) (1<<25)) >> 26; t1 += c0;      t0 -= c0 * (1 << 26); \
    c2 = (t2 + (i64) (1<<25)) >> 26; t3 += c2;      t2 -= c2 * (1 << 26); \
    c4 = (t4 + (i64) (1<<25)) >> 26; t5 += c4;      t4 -= c4 * (1 << 26); \
    c6 = (t6 + (i64) (1<<25)) >> 26; t7 += c6;      t6 -= c6 * (1 << 26); \
    c8 = (t8 + (i64) (1<<25)) >> 26; t9 += c8;      t8 -= c8 * (1 << 26); \
    h[0]=(i32)t0;  h[1]=(i32)t1;  h[2]=(i32)t2;  h[3]=(i32)t3;  h[4]=(i32)t4; \
    h[5]=(i32)t5;  h[6]=(i32)t6;  h[7]=(i32)t7;  h[8]=(i32)t8;  h[9]=(i32)t9

static void fe_frombytes(fe h, const u8 s[32])
{
    i64 t0 =  load32_le(s);
    i64 t1 =  load24_le(s +  4) << 6;
    i64 t2 =  load24_le(s +  7) << 5;
    i64 t3 =  load24_le(s + 10) << 3;
    i64 t4 =  load24_le(s + 13) << 2;
    i64 t5 =  load32_le(s + 16);
    i64 t6 =  load24_le(s + 20) << 7;
    i64 t7 =  load24_le(s + 23) << 5;
    i64 t8 =  load24_le(s + 26) << 4;
    i64 t9 = (load24_le(s + 29) & 8388607) << 2;
    FE_CARRY;
}

static void fe_mul_small(fe h, const fe f, i32 g)
{
    i64 t0 = f[0] * (i64) g;  i64 t1 = f[1] * (i64) g;
    i64 t2 = f[2] * (i64) g;  i64 t3 = f[3] * (i64) g;
    i64 t4 = f[4] * (i64) g;  i64 t5 = f[5] * (i64) g;
    i64 t6 = f[6] * (i64) g;  i64 t7 = f[7] * (i64) g;
    i64 t8 = f[8] * (i64) g;  i64 t9 = f[9] * (i64) g;
    FE_CARRY;
}
static void fe_mul121666(fe h, const fe f) { fe_mul_small(h, f, 121666); }

static void fe_mul(fe h, const fe f, const fe g)
{
    // Everything is unrolled and put in temporary variables.
    // We could roll the loop, but that would make curve25519 twice as slow.
    i32 f0 = f[0]; i32 f1 = f[1]; i32 f2 = f[2]; i32 f3 = f[3]; i32 f4 = f[4];
    i32 f5 = f[5]; i32 f6 = f[6]; i32 f7 = f[7]; i32 f8 = f[8]; i32 f9 = f[9];
    i32 g0 = g[0]; i32 g1 = g[1]; i32 g2 = g[2]; i32 g3 = g[3]; i32 g4 = g[4];
    i32 g5 = g[5]; i32 g6 = g[6]; i32 g7 = g[7]; i32 g8 = g[8]; i32 g9 = g[9];
    i32 F1 = f1*2; i32 F3 = f3*2; i32 F5 = f5*2; i32 F7 = f7*2; i32 F9 = f9*2;
    i32 G1 = g1*19;  i32 G2 = g2*19;  i32 G3 = g3*19;
    i32 G4 = g4*19;  i32 G5 = g5*19;  i32 G6 = g6*19;
    i32 G7 = g7*19;  i32 G8 = g8*19;  i32 G9 = g9*19;

    i64 h0 = f0*(i64)g0 + F1*(i64)G9 + f2*(i64)G8 + F3*(i64)G7 + f4*(i64)G6
        +    F5*(i64)G5 + f6*(i64)G4 + F7*(i64)G3 + f8*(i64)G2 + F9*(i64)G1;
    i64 h1 = f0*(i64)g1 + f1*(i64)g0 + f2*(i64)G9 + f3*(i64)G8 + f4*(i64)G7
        +    f5*(i64)G6 + f6*(i64)G5 + f7*(i64)G4 + f8*(i64)G3 + f9*(i64)G2;
    i64 h2 = f0*(i64)g2 + F1*(i64)g1 + f2*(i64)g0 + F3*(i64)G9 + f4*(i64)G8
        +    F5*(i64)G7 + f6*(i64)G6 + F7*(i64)G5 + f8*(i64)G4 + F9*(i64)G3;
    i64 h3 = f0*(i64)g3 + f1*(i64)g2 + f2*(i64)g1 + f3*(i64)g0 + f4*(i64)G9
        +    f5*(i64)G8 + f6*(i64)G7 + f7*(i64)G6 + f8*(i64)G5 + f9*(i64)G4;
    i64 h4 = f0*(i64)g4 + F1*(i64)g3 + f2*(i64)g2 + F3*(i64)g1 + f4*(i64)g0
        +    F5*(i64)G9 + f6*(i64)G8 + F7*(i64)G7 + f8*(i64)G6 + F9*(i64)G5;
    i64 h5 = f0*(i64)g5 + f1*(i64)g4 + f2*(i64)g3 + f3*(i64)g2 + f4*(i64)g1
        +    f5*(i64)g0 + f6*(i64)G9 + f7*(i64)G8 + f8*(i64)G7 + f9*(i64)G6;
    i64 h6 = f0*(i64)g6 + F1*(i64)g5 + f2*(i64)g4 + F3*(i64)g3 + f4*(i64)g2
        +    F5*(i64)g1 + f6*(i64)g0 + F7*(i64)G9 + f8*(i64)G8 + F9*(i64)G7;
    i64 h7 = f0*(i64)g7 + f1*(i64)g6 + f2*(i64)g5 + f3*(i64)g4 + f4*(i64)g3
        +    f5*(i64)g2 + f6*(i64)g1 + f7*(i64)g0 + f8*(i64)G9 + f9*(i64)G8;
    i64 h8 = f0*(i64)g8 + F1*(i64)g7 + f2*(i64)g6 + F3*(i64)g5 + f4*(i64)g4
        +    F5*(i64)g3 + f6*(i64)g2 + F7*(i64)g1 + f8*(i64)g0 + F9*(i64)G9;
    i64 h9 = f0*(i64)g9 + f1*(i64)g8 + f2*(i64)g7 + f3*(i64)g6 + f4*(i64)g5
        +    f5*(i64)g4 + f6*(i64)g3 + f7*(i64)g2 + f8*(i64)g1 + f9*(i64)g0;

#define CARRY                                                             \
    i64 c0, c1, c2, c3, c4, c5, c6, c7, c8, c9;                           \
    c0 = (h0 + (i64) (1<<25)) >> 26; h1 += c0;      h0 -= c0 * (1 << 26); \
    c4 = (h4 + (i64) (1<<25)) >> 26; h5 += c4;      h4 -= c4 * (1 << 26); \
    c1 = (h1 + (i64) (1<<24)) >> 25; h2 += c1;      h1 -= c1 * (1 << 25); \
    c5 = (h5 + (i64) (1<<24)) >> 25; h6 += c5;      h5 -= c5 * (1 << 25); \
    c2 = (h2 + (i64) (1<<25)) >> 26; h3 += c2;      h2 -= c2 * (1 << 26); \
    c6 = (h6 + (i64) (1<<25)) >> 26; h7 += c6;      h6 -= c6 * (1 << 26); \
    c3 = (h3 + (i64) (1<<24)) >> 25; h4 += c3;      h3 -= c3 * (1 << 25); \
    c7 = (h7 + (i64) (1<<24)) >> 25; h8 += c7;      h7 -= c7 * (1 << 25); \
    c4 = (h4 + (i64) (1<<25)) >> 26; h5 += c4;      h4 -= c4 * (1 << 26); \
    c8 = (h8 + (i64) (1<<25)) >> 26; h9 += c8;      h8 -= c8 * (1 << 26); \
    c9 = (h9 + (i64) (1<<24)) >> 25; h0 += c9 * 19; h9 -= c9 * (1 << 25); \
    c0 = (h0 + (i64) (1<<25)) >> 26; h1 += c0;      h0 -= c0 * (1 << 26); \
    h[0]=(i32)h0;  h[1]=(i32)h1;  h[2]=(i32)h2;  h[3]=(i32)h3;  h[4]=(i32)h4; \
    h[5]=(i32)h5;  h[6]=(i32)h6;  h[7]=(i32)h7;  h[8]=(i32)h8;  h[9]=(i32)h9; \

    CARRY;
}

// we could use fe_mul() for this, but this is significantly faster
static void fe_sq(fe h, const fe f)
{
    i32 f0 = f[0]; i32 f1 = f[1]; i32 f2 = f[2]; i32 f3 = f[3]; i32 f4 = f[4];
    i32 f5 = f[5]; i32 f6 = f[6]; i32 f7 = f[7]; i32 f8 = f[8]; i32 f9 = f[9];
    i32 f0_2  = f0*2;   i32 f1_2  = f1*2;   i32 f2_2  = f2*2;   i32 f3_2 = f3*2;
    i32 f4_2  = f4*2;   i32 f5_2  = f5*2;   i32 f6_2  = f6*2;   i32 f7_2 = f7*2;
    i32 f5_38 = f5*38;  i32 f6_19 = f6*19;  i32 f7_38 = f7*38;
    i32 f8_19 = f8*19;  i32 f9_38 = f9*38;

    i64 h0 = f0  *(i64)f0    + f1_2*(i64)f9_38 + f2_2*(i64)f8_19
        +    f3_2*(i64)f7_38 + f4_2*(i64)f6_19 + f5  *(i64)f5_38;
    i64 h1 = f0_2*(i64)f1    + f2  *(i64)f9_38 + f3_2*(i64)f8_19
        +    f4  *(i64)f7_38 + f5_2*(i64)f6_19;
    i64 h2 = f0_2*(i64)f2    + f1_2*(i64)f1    + f3_2*(i64)f9_38
        +    f4_2*(i64)f8_19 + f5_2*(i64)f7_38 + f6  *(i64)f6_19;
    i64 h3 = f0_2*(i64)f3    + f1_2*(i64)f2    + f4  *(i64)f9_38
        +    f5_2*(i64)f8_19 + f6  *(i64)f7_38;
    i64 h4 = f0_2*(i64)f4    + f1_2*(i64)f3_2  + f2  *(i64)f2
        +    f5_2*(i64)f9_38 + f6_2*(i64)f8_19 + f7  *(i64)f7_38;
    i64 h5 = f0_2*(i64)f5    + f1_2*(i64)f4    + f2_2*(i64)f3
        +    f6  *(i64)f9_38 + f7_2*(i64)f8_19;
    i64 h6 = f0_2*(i64)f6    + f1_2*(i64)f5_2  + f2_2*(i64)f4
        +    f3_2*(i64)f3    + f7_2*(i64)f9_38 + f8  *(i64)f8_19;
    i64 h7 = f0_2*(i64)f7    + f1_2*(i64)f6    + f2_2*(i64)f5
        +    f3_2*(i64)f4    + f8  *(i64)f9_38;
    i64 h8 = f0_2*(i64)f8    + f1_2*(i64)f7_2  + f2_2*(i64)f6
        +    f3_2*(i64)f5_2  + f4  *(i64)f4    + f9  *(i64)f9_38;
    i64 h9 = f0_2*(i64)f9    + f1_2*(i64)f8    + f2_2*(i64)f7
        +    f3_2*(i64)f6    + f4  *(i64)f5_2;

    CARRY;
}

static void fe_sq2(fe h, const fe f)
{
    fe_sq(h, f);
    fe_mul_small(h, h, 2);
}

// This could be simplified, but it would be slower
static void fe_invert(fe out, const fe z)
{
    fe t0, t1, t2, t3;
    fe_sq(t0, z );
    fe_sq(t1, t0);
    fe_sq(t1, t1);
    fe_mul(t1,  z, t1);
    fe_mul(t0, t0, t1);
    fe_sq(t2, t0);                                fe_mul(t1 , t1, t2);
    fe_sq(t2, t1); FOR (i, 1,   5) fe_sq(t2, t2); fe_mul(t1 , t2, t1);
    fe_sq(t2, t1); FOR (i, 1,  10) fe_sq(t2, t2); fe_mul(t2 , t2, t1);
    fe_sq(t3, t2); FOR (i, 1,  20) fe_sq(t3, t3); fe_mul(t2 , t3, t2);
    fe_sq(t2, t2); FOR (i, 1,  10) fe_sq(t2, t2); fe_mul(t1 , t2, t1);
    fe_sq(t2, t1); FOR (i, 1,  50) fe_sq(t2, t2); fe_mul(t2 , t2, t1);
    fe_sq(t3, t2); FOR (i, 1, 100) fe_sq(t3, t3); fe_mul(t2 , t3, t2);
    fe_sq(t2, t2); FOR (i, 1,  50) fe_sq(t2, t2); fe_mul(t1 , t2, t1);
    fe_sq(t1, t1); FOR (i, 1,   5) fe_sq(t1, t1); fe_mul(out, t1, t0);
    WIPE_BUFFER(t0);
    WIPE_BUFFER(t1);
    WIPE_BUFFER(t2);
    WIPE_BUFFER(t3);
}

// This could be simplified, but it would be slower
static void fe_pow22523(fe out, const fe z)
{
    fe t0, t1, t2;
    fe_sq(t0, z);
    fe_sq(t1,t0);                   fe_sq(t1, t1);  fe_mul(t1, z, t1);
    fe_mul(t0, t0, t1);
    fe_sq(t0, t0);                                  fe_mul(t0, t1, t0);
    fe_sq(t1, t0);  FOR (i, 1,   5) fe_sq(t1, t1);  fe_mul(t0, t1, t0);
    fe_sq(t1, t0);  FOR (i, 1,  10) fe_sq(t1, t1);  fe_mul(t1, t1, t0);
    fe_sq(t2, t1);  FOR (i, 1,  20) fe_sq(t2, t2);  fe_mul(t1, t2, t1);
    fe_sq(t1, t1);  FOR (i, 1,  10) fe_sq(t1, t1);  fe_mul(t0, t1, t0);
    fe_sq(t1, t0);  FOR (i, 1,  50) fe_sq(t1, t1);  fe_mul(t1, t1, t0);
    fe_sq(t2, t1);  FOR (i, 1, 100) fe_sq(t2, t2);  fe_mul(t1, t2, t1);
    fe_sq(t1, t1);  FOR (i, 1,  50) fe_sq(t1, t1);  fe_mul(t0, t1, t0);
    fe_sq(t0, t0);  FOR (i, 1,   2) fe_sq(t0, t0);  fe_mul(out, t0, z);
    WIPE_BUFFER(t0);
    WIPE_BUFFER(t1);
    WIPE_BUFFER(t2);
}

static void fe_tobytes(u8 s[32], const fe h)
{
    i32 t[10];
    FOR (i, 0, 10) {
        t[i] = h[i];
    }
    i32 q = (19 * t[9] + (((i32) 1) << 24)) >> 25;
    FOR (i, 0, 5) {
        q += t[2*i  ]; q >>= 26;
        q += t[2*i+1]; q >>= 25;
    }
    t[0] += 19 * q;

    i32 c0 = t[0] >> 26; t[1] += c0; t[0] -= c0 * (1 << 26);
    i32 c1 = t[1] >> 25; t[2] += c1; t[1] -= c1 * (1 << 25);
    i32 c2 = t[2] >> 26; t[3] += c2; t[2] -= c2 * (1 << 26);
    i32 c3 = t[3] >> 25; t[4] += c3; t[3] -= c3 * (1 << 25);
    i32 c4 = t[4] >> 26; t[5] += c4; t[4] -= c4 * (1 << 26);
    i32 c5 = t[5] >> 25; t[6] += c5; t[5] -= c5 * (1 << 25);
    i32 c6 = t[6] >> 26; t[7] += c6; t[6] -= c6 * (1 << 26);
    i32 c7 = t[7] >> 25; t[8] += c7; t[7] -= c7 * (1 << 25);
    i32 c8 = t[8] >> 26; t[9] += c8; t[8] -= c8 * (1 << 26);
    i32 c9 = t[9] >> 25;             t[9] -= c9 * (1 << 25);

    store32_le(s +  0, ((u32)t[0] >>  0) | ((u32)t[1] << 26));
    store32_le(s +  4, ((u32)t[1] >>  6) | ((u32)t[2] << 19));
    store32_le(s +  8, ((u32)t[2] >> 13) | ((u32)t[3] << 13));
    store32_le(s + 12, ((u32)t[3] >> 19) | ((u32)t[4] <<  6));
    store32_le(s + 16, ((u32)t[5] >>  0) | ((u32)t[6] << 25));
    store32_le(s + 20, ((u32)t[6] >>  7) | ((u32)t[7] << 19));
    store32_le(s + 24, ((u32)t[7] >> 13) | ((u32)t[8] << 12));
    store32_le(s + 28, ((u32)t[8] >> 20) | ((u32)t[9] <<  6));

    WIPE_BUFFER(t);
}

//  Parity check.  Returns 0 if even, 1 if odd
static int fe_isnegative(const fe f)
{
    u8 s[32];
    fe_tobytes(s, f);
    u8 isneg = s[0] & 1;
    WIPE_BUFFER(s);
    return isneg;
}

static int fe_isnonzero(const fe f)
{
    u8 s[32];
    fe_tobytes(s, f);
    u8 isnonzero = zerocmp32(s);
    WIPE_BUFFER(s);
    return isnonzero;
}

///////////////
/// X-25519 /// Taken from Supercop's ref10 implementation.
///////////////

static void trim_scalar(u8 s[32])
{
    s[ 0] &= 248;
    s[31] &= 127;
    s[31] |= 64;
}

static int scalar_bit(const u8 s[32], int i) { return (s[i>>3] >> (i&7)) & 1; }

int crypto_x25519(u8       raw_shared_secret[32],
                  const u8 your_secret_key  [32],
                  const u8 their_public_key [32])
{
    // computes the scalar product
    fe x1;
    fe_frombytes(x1, their_public_key);

    // restrict the possible scalar values
    u8 e[32];
    FOR (i, 0, 32) {
        e[i] = your_secret_key[i];
    }
    trim_scalar(e);

    // computes the actual scalar product (the result is in x2 and z2)
    fe x2, z2, x3, z3, t0, t1;
    // Montgomery ladder
    // In projective coordinates, to avoid divisons: x = X / Z
    // We don't care about the y coordinate, it's only 1 bit of information
    fe_1(x2);        fe_0(z2); // "zero" point
    fe_copy(x3, x1); fe_1(z3); // "one"  point
    int swap = 0;
    for (int pos = 254; pos >= 0; --pos) {
        // constant time conditional swap before ladder step
        int b = scalar_bit(e, pos);
        swap ^= b; // xor trick avoids swapping at the end of the loop
        fe_cswap(x2, x3, swap);
        fe_cswap(z2, z3, swap);
        swap = b;  // anticipates one last swap after the loop

        // Montgomery ladder step: replaces (P2, P3) by (P2*2, P2+P3)
        // with differential addition
        fe_sub(t0, x3, z3);  fe_sub(t1, x2, z2);    fe_add(x2, x2, z2);
        fe_add(z2, x3, z3);  fe_mul(z3, t0, x2);    fe_mul(z2, z2, t1);
        fe_sq (t0, t1    );  fe_sq (t1, x2    );    fe_add(x3, z3, z2);
        fe_sub(z2, z3, z2);  fe_mul(x2, t1, t0);    fe_sub(t1, t1, t0);
        fe_sq (z2, z2    );  fe_mul121666(z3, t1);  fe_sq (x3, x3    );
        fe_add(t0, t0, z3);  fe_mul(z3, x1, z2);    fe_mul(z2, t1, t0);
    }
    // last swap is necessary to compensate for the xor trick
    // Note: after this swap, P3 == P2 + P1.
    fe_cswap(x2, x3, swap);
    fe_cswap(z2, z3, swap);

    // normalises the coordinates: x == X / Z
    fe_invert(z2, z2);
    fe_mul(x2, x2, z2);
    fe_tobytes(raw_shared_secret, x2);

    WIPE_BUFFER(x1);  WIPE_BUFFER(e );
    WIPE_BUFFER(x2);  WIPE_BUFFER(z2);
    WIPE_BUFFER(x3);  WIPE_BUFFER(z3);
    WIPE_BUFFER(t0);  WIPE_BUFFER(t1);

    // Returns -1 if the output is all zero
    // (happens with some malicious public keys)
    return -1 - zerocmp32(raw_shared_secret);
}

void crypto_x25519_public_key(u8       public_key[32],
                              const u8 secret_key[32])
{
    static const u8 base_point[32] = {9};
    crypto_x25519(public_key, secret_key, base_point);
}

///////////////
/// Ed25519 ///
///////////////

static const  u64 L[32] = { 0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,
                            0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14,
                            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10};

static void modL(u8 *r, i64 x[64])
{
    for (unsigned i = 63; i >= 32; i--) {
        i64 carry = 0;
        FOR (j, i-32, i-12) {
            x[j] += carry - 16 * x[i] * L[j - (i - 32)];
            carry = (x[j] + 128) >> 8;
            x[j] -= carry * (1 << 8);
        }
        x[i-12] += carry;
        x[i] = 0;
    }
    i64 carry = 0;
    FOR (i, 0, 32) {
        x[i] += carry - (x[31] >> 4) * L[i];
        carry = x[i] >> 8;
        x[i] &= 255;
    }
    FOR (i, 0, 32) {
        x[i] -= carry * L[i];
    }
    FOR (i, 0, 32) {
        x[i+1] += x[i] >> 8;
        r[i  ]  = x[i] & 255;
    }
}

static void reduce(u8 r[64])
{
    i64 x[64];
    FOR (i, 0, 64) {
        x[i] = (u64) r[i];
        r[i] = 0;
    }
    modL(r, x);
    WIPE_BUFFER(x);
}

// r = (a * b) + c
static void mul_add(u8 r[32], const u8 a[32], const u8 b[32], const u8 c[32])
{
    i64 s[64];
    FOR (i,  0, 32) { s[i] = (u64) c[i]; }
    FOR (i, 32, 64) { s[i] = 0;          }
    FOR (i,  0, 32) {
        FOR (j, 0, 32) {
            s[i+j] += a[i] * (u64) b[j];
        }
    }
    modL(r, s);
    WIPE_BUFFER(s);
}

static int is_above_L(const u8 a[32])
{
    for (int i = 31; i >= 0; i--) {
        if (a[i] > L[i]) { return 1; }
        if (a[i] < L[i]) { return 0; }
    }
    return 1;
}

// Point in a twisted Edwards curve,
// in extended projective coordinates.
// x = X/Z, y = Y/Z, T = XY/Z
typedef struct { fe X;  fe Y;  fe Z; fe T;  } ge;
typedef struct { fe Yp; fe Ym; fe Z; fe T2; } ge_cached;

static void ge_zero(ge *p)
{
    fe_0(p->X);
    fe_1(p->Y);
    fe_1(p->Z);
    fe_0(p->T);
}

static void ge_tobytes(u8 s[32], const ge *h)
{
    fe recip, x, y;
    fe_invert(recip, h->Z);
    fe_mul(x, h->X, recip);
    fe_mul(y, h->Y, recip);
    fe_tobytes(s, y);
    s[31] ^= fe_isnegative(x) << 7;

    WIPE_BUFFER(recip);
    WIPE_BUFFER(x);
    WIPE_BUFFER(y);
}

// Variable time! s must not be secret!
static int ge_frombytes_neg_vartime(ge *h, const u8 s[32])
{
    static const fe d = {
        -10913610, 13857413, -15372611, 6949391, 114729,
        -8787816, -6275908, -3247719, -18696448, -12055116
    } ;
    static const fe sqrtm1 = {
        -32595792, -7943725, 9377950, 3500415, 12389472,
        -272473, -25146209, -2005654, 326686, 11406482
    } ;
    fe u, v, v3, vxx, check; // no secret, no wipe
    fe_frombytes(h->Y, s);
    fe_1(h->Z);
    fe_sq(u, h->Y);            // y^2
    fe_mul(v, u, d);
    fe_sub(u, u, h->Z);        // u = y^2-1
    fe_add(v, v, h->Z);        // v = dy^2+1

    fe_sq(v3, v);
    fe_mul(v3, v3, v);         // v3 = v^3
    fe_sq(h->X, v3);
    fe_mul(h->X, h->X, v);
    fe_mul(h->X, h->X, u);     // x = uv^7

    fe_pow22523(h->X, h->X);   // x = (uv^7)^((q-5)/8)
    fe_mul(h->X, h->X, v3);
    fe_mul(h->X, h->X, u);     // x = uv^3(uv^7)^((q-5)/8)

    fe_sq(vxx, h->X);
    fe_mul(vxx, vxx, v);
    fe_sub(check, vxx, u);     // vx^2-u
    if (fe_isnonzero(check)) {
        fe_add(check, vxx, u); // vx^2+u
        if (fe_isnonzero(check)) {
            return -1;
        }
        fe_mul(h->X, h->X, sqrtm1);
    }
    if (fe_isnegative(h->X) == (s[31] >> 7)) {
        fe_neg(h->X, h->X);
    }
    fe_mul(h->T, h->X, h->Y);
    return 0;
}

static void ge_cache(ge_cached *c, const ge *p)
{
    static const fe D2 = { // - 2 * 121665 / 121666
        -21827239, -5839606, -30745221, 13898782, 229458,
        15978800, -12551817, -6495438, 29715968, 9444199
    };
    fe_add (c->Yp, p->Y, p->X);
    fe_sub (c->Ym, p->Y, p->X);
    fe_copy(c->Z , p->Z      );
    fe_mul (c->T2, p->T, D2  );
}

static void ge_add(ge *s, const ge *p, const ge_cached *q)
{
    fe a, b; // not used to process secrets, no need to wipe
    fe_add(a   , p->Y, p->X );
    fe_sub(b   , p->Y, p->X );
    fe_mul(a   , a   , q->Yp);
    fe_mul(b   , b   , q->Ym);
    fe_add(s->Y, a   , b    );
    fe_sub(s->X, a   , b    );

    fe_add(s->Z, p->Z, p->Z );
    fe_mul(s->Z, s->Z, q->Z );
    fe_mul(s->T, p->T, q->T2);
    fe_add(a   , s->Z, s->T );
    fe_sub(b   , s->Z, s->T );

    fe_mul(s->T, s->X, s->Y);
    fe_mul(s->X, s->X, b   );
    fe_mul(s->Y, s->Y, a   );
    fe_mul(s->Z, a   , b   );
}

static void ge_sub(ge *s, const ge *p, const ge_cached *q)
{
    ge_cached neg;
    fe_copy(neg.Ym, q->Yp);
    fe_copy(neg.Yp, q->Ym);
    fe_copy(neg.Z , q->Z );
    fe_neg (neg.T2, q->T2);
    ge_add(s, p, &neg);
}

static void ge_madd(ge *s, const ge *p, const fe yp, const fe ym, const fe t2,
                    fe a, fe b)
{
    fe_add(a   , p->Y, p->X );
    fe_sub(b   , p->Y, p->X );
    fe_mul(a   , a   , yp   );
    fe_mul(b   , b   , ym   );
    fe_add(s->Y, a   , b    );
    fe_sub(s->X, a   , b    );

    fe_add(s->Z, p->Z, p->Z );
    fe_mul(s->T, p->T, t2   );
    fe_add(a   , s->Z, s->T );
    fe_sub(b   , s->Z, s->T );

    fe_mul(s->T, s->X, s->Y);
    fe_mul(s->X, s->X, b   );
    fe_mul(s->Y, s->Y, a   );
    fe_mul(s->Z, a   , b   );
}

static void ge_double(ge *s, const ge *p, ge *q)
{
    fe_sq (q->X, p->X);
    fe_sq (q->Y, p->Y);
    fe_sq2(q->Z, p->Z);
    fe_add(q->T, p->X, p->Y);
    fe_sq (s->T, q->T);
    fe_add(q->T, q->Y, q->X);
    fe_sub(q->Y, q->Y, q->X);
    fe_sub(q->X, s->T, q->T);
    fe_sub(q->Z, q->Z, q->Y);

    fe_mul(s->X, q->X , q->Z);
    fe_mul(s->Y, q->T , q->Y);
    fe_mul(s->Z, q->Y , q->Z);
    fe_mul(s->T, q->X , q->T);
}

// Compute signed sliding windows (either 0, or odd numbers between -15 and 15)
static void slide(i8 adds[258], const u8 scalar[32])
{
    FOR (i,   0, 256) { adds[i] = scalar_bit(scalar, i); }
    FOR (i, 256, 258) { adds[i] = 0;                     }
    FOR (i, 0, 254) {
        if (adds[i] != 0) {
            // base value of the 5-bit window
            FOR (j, 1, 5) {
                adds[i  ] |= adds[i+j] << j;
                adds[i+j]  = 0;
            }
            if (adds[i] > 16) {
                // go back to [-15, 15], propagate carry.
                adds[i] -= 32;
                int j = i + 5;
                while (adds[j] != 0) {
                    adds[j] = 0;
                    j++;
                }
                adds[j] = 1;
            }
        }
    }
}

// Look up table for sliding windows
static void ge_precompute(ge_cached lut[8], const ge *P1)
{
    ge P2, tmp;
    ge_double(&P2, P1, &tmp);
    ge_cache(&lut[0], P1);
    FOR (i, 0, 7) {
        ge_add(&tmp, &P2, &lut[i]);
        ge_cache(&lut[i+1], &tmp);
    }
}

// Could be a function, but the macro avoids some overhead.
#define LUT_ADD(sum, lut, adds, i)                             \
    if (adds[i] > 0) { ge_add(sum, sum, &lut[ adds[i] / 2]); } \
    if (adds[i] < 0) { ge_sub(sum, sum, &lut[-adds[i] / 2]); }

// Variable time! P, sP, and sB must not be secret!
static void ge_double_scalarmult_vartime(ge *sum, const ge *P,
                                         u8 p[32], u8 b[32])
{
    static const fe X = { -14297830, -7645148, 16144683, -16471763, 27570974,
                          -2696100, -26142465, 8378389, 20764389, 8758491 };
    static const fe Y = { -26843541, -6710886, 13421773, -13421773, 26843546,
                          6710886, -13421773, 13421773, -26843546, -6710886 };
    ge B;
    fe_copy(B.X, X);
    fe_copy(B.Y, Y);
    fe_1   (B.Z);
    fe_mul (B.T, X, Y);

    // cached points for addition
    ge_cached cP[8];  ge_precompute(cP,  P);
    ge_cached cB[8];  ge_precompute(cB, &B);
    i8 p_adds[258];   slide(p_adds, p);
    i8 b_adds[258];   slide(b_adds, b);

    // Avoid the first doublings
    int i = 253;
    while (i >= 0         &&
           p_adds[i] == 0 &&
           b_adds[i] == 0) {
        i--;
    }

    // Merged double and add ladder
    ge_zero(sum);
    LUT_ADD(sum, cP, p_adds, i);
    LUT_ADD(sum, cB, b_adds, i);
    i--;
    while (i >= 0) {
        ge_double(sum, sum, &B); // B is no longer used, we can overwrite it
        LUT_ADD(sum, cP, p_adds, i);
        LUT_ADD(sum, cB, b_adds, i);
        i--;
    }
}

// 5-bit signed comb in cached format (Niels coordinates, Z=1)
static const fe comb_Yp[16] = {
    {2615675, 9989699, 17617367, -13953520, -8802803,
     1447286, -8909978, -270892, -12199203, -11617247},
    {-1271192, 4785266, -29856067, -6036322, -10435381,
     15493337, 20321440, -6036064, 15902131, 13420909},
    {-26170888, -12891603, 9568996, -6197816, 26424622,
     16308973, -4518568, -3771275, -15522557, 3991142},
    {-25875044, 1958396, 19442242, -9809943, -26099408,
     -18589, -30794750, -14100910, 4971028, -10535388},
    {-13896937, -7357727, -12131124, 617289, -33188817,
     10080542, 6402555, 10779157, 1176712, 2472642},
    {71503, 12662254, -17008072, -8370006, 23408384,
     -12897959, 32287612, 11241906, -16724175, 15336924},
    {27397666, 4059848, 23573959, 8868915, -10602416,
     -10456346, -22812831, -9666299, 31810345, -2695469},
    {-3418193, -694531, 2320482, -11850408, -1981947,
     -9606132, 23743894, 3933038, -25004889, -4478918},
    {-4448372, 5537982, -4805580, 14016777, 15544316,
     16039459, -7143453, -8003716, -21904564, 8443777},
    {32495180, 15749868, 2195406, -15542321, -3213890,
     -4030779, -2915317, 12751449, -1872493, 11926798},
    {26779741, 12553580, -24344000, -4071926, -19447556,
     -13464636, 21989468, 7826656, -17344881, 10055954},
    {5848288, -1639207, -10452929, -11760637, 6484174,
     -5895268, -11561603, 587105, -19220796, 14378222},
    {32050187, 12536702, 9206308, -10016828, -13333241,
     -4276403, -24225594, 14562479, -31803624, -9967812},
    {23536033, -6219361, 199701, 4574817, 30045793,
     7163081, -2244033, 883497, 10960746, -14779481},
    {-8143354, -11558749, 15772067, 14293390, 5914956,
     -16702904, -7410985, 7536196, 6155087, 16571424},
    {6211591, -11166015, 24568352, 2768318, -10822221,
     11922793, 33211827, 3852290, -13160369, -8855385},
};
static const fe comb_Ym[16] = {
    {8873912, 14981221, 13714139, 6923085, 25481101,
     4243739, 4646647, -203847, 9015725, -16205935},
    {-1827892, 15407265, 2351140, -11810728, 28403158,
     -1487103, -15057287, -4656433, -3780118, -1145998},
    {-30623162, -11845055, -11327147, -16008347, 17564978,
     -1449578, -20580262, 14113978, 29643661, 15580734},
    {-15109423, 13348938, -14756006, 14132355, 30481360,
     1830723, -240510, 9371801, -13907882, 8024264},
    {25119567, 5628696, 10185251, -9279452, 683770,
     -14523112, -7982879, -16450545, 1431333, -13253541},
    {-8390493, 1276691, 19008763, -12736675, -9249429,
     -12526388, 17434195, -13761261, 18962694, -1227728},
    {26361856, -12366343, 8941415, 15163068, 7069802,
     -7240693, -18656349, 8167008, 31106064, -1670658},
    {-5677136, -11012483, -1246680, -6422709, 14772010,
     1829629, -11724154, -15914279, -18177362, 1301444},
    {937094, 12383516, -22597284, 7580462, -18767748,
     13813292, -2323566, 13503298, 11510849, -10561992},
    {28028043, 14715827, -6558532, -1773240, 27563607,
     -9374554, 3201863, 8865591, -16953001, 7659464},
    {13628467, 5701368, 4674031, 11935670, 11461401,
     10699118, 31846435, -114971, -8269924, -14777505},
    {-22124018, -12859127, 11966893, 1617732, 30972446,
     -14350095, -21822286, 8369862, -29443219, -15378798},
    {290131, -471434, 8840522, -2654851, 25963762,
     -11578288, -7227978, 13847103, 30641797, 6003514},
    {-23547482, -11475166, -11913550, 9374455, 22813401,
     -5707910, 26635288, 9199956, 20574690, 2061147},
    {9715324, 7036821, -17981446, -11505533, 26555178,
     -3571571, 5697062, -14128022, 2795223, 9694380},
    {14864569, -6319076, -3080, -8151104, 4994948,
     -1572144, -41927, 9269803, 13881712, -13439497},
};
static const fe comb_T2[16] = {
    {-18494317, 2686822, 18449263, -13905325, 5966562,
     -3368714, 2738304, -8583315, 15987143, 12180258},
    {-33336513, -13705917, -18473364, -5039204, -4268481,
     -4136039, -8192211, -2935105, -19354402, 5995895},
    {-19753139, -1729018, 21880604, 13471713, 28315373,
     -8530159, -17492688, 11730577, -8790216, 3942124},
    {17278020, 3905045, 29577748, 11151940, 18451761,
     -6801382, 31480073, -13819665, 26308905, 10868496},
    {26937294, 3313561, 28601532, -3497112, -22814130,
     11073654, 8956359, -16757370, 13465868, 16623983},
    {-5468054, 6059101, -31275300, 2469124, 26532937,
     8152142, 6423741, -11427054, -15537747, -10938247},
    {-11303505, -9659620, -12354748, -9331434, 19501116,
     -9146390, -841918, -5315657, 8903828, 8839982},
    {16603354, -215859, 1591180, 3775832, -705596,
     -13913449, 26574704, 14963118, 19649719, 6562441},
    {33188866, -12232360, -24929148, -6133828, 21818432,
     11040754, -3041582, -3524558, -29364727, -10264096},
    {-20704194, -12560423, -1235774, -785473, 13240395,
     4831780, -472624, -3796899, 25480903, -15422283},
    {-2204347, -16313180, -21388048, 7520851, -8697745,
     -14460961, 20894017, 12210317, -475249, -2319102},
    {-16407882, 4940236, -21194947, 10781753, 22248400,
     14425368, 14866511, -7552907, 12148703, -7885797},
    {16376744, 15908865, -30663553, 4663134, -30882819,
     -10105163, 19294784, -10800440, -33259252, 2563437},
    {30208741, 11594088, -15145888, 15073872, 5279309,
     -9651774, 8273234, 4796404, -31270809, -13316433},
    {-17802574, 14455251, 27149077, -7832700, -29163160,
     -7246767, 17498491, -4216079, 31788733, -14027536},
    {-25233439, -9389070, -6618212, -3268087, -521386,
     -7350198, 21035059, -14970947, 25910190, 11122681},
};

static void ge_scalarmult_base(ge *p, const u8 scalar[32])
{
    // 5-bits signed comb, from Mike Hamburg's
    // Fast and compact elliptic-curve cryptography (2012)
    static const u8 half_mod_L[32] = { // 1 / 2 modulo L
        0xf7, 0xe9, 0x7a, 0x2e, 0x8d, 0x31, 0x09, 0x2c,
        0x6b, 0xce, 0x7b, 0x51, 0xef, 0x7c, 0x6f, 0x0a,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
    };
    static const u8 half_ones[32] = { // (2^255 - 1) / 2 modulo L
        0x42, 0x9a, 0xa3, 0xba, 0x23, 0xa5, 0xbf, 0xcb,
        0x11, 0x5b, 0x9d, 0xc5, 0x74, 0x95, 0xf3, 0xb6,
        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07,
    };
    // All bits set form: 1 means 1, 0 means -1
    u8 s_scalar[32];
    mul_add(s_scalar, scalar, half_mod_L, half_ones);

    // Double and add ladder
    fe yp, ym, t2, n2, a, b; // temporaries for addition
    ge dbl;                  // temporary for doublings
    ge_zero(p);
    for (int i = 50; i >= 0; i--) {
        if (i < 50) {
            ge_double(p, p, &dbl);
        }
        fe_1(yp);
        fe_1(ym);
        fe_0(t2);
        u8 teeth =  scalar_bit(s_scalar, i)
            +      (scalar_bit(s_scalar, i +  51) << 1)
            +      (scalar_bit(s_scalar, i + 102) << 2)
            +      (scalar_bit(s_scalar, i + 153) << 3)
            +      (scalar_bit(s_scalar, i + 204) << 4);
        u8 high  = teeth >> 4;
        u8 index = (teeth ^ (high - 1)) & 15;
        FOR (j, 0, 16) {
            i32 select = 1 & (((j ^ index) - 1) >> 8);
            fe_ccopy(yp, comb_Yp[j], select);
            fe_ccopy(ym, comb_Ym[j], select);
            fe_ccopy(t2, comb_T2[j], select);
        }

        fe_neg(n2, t2);
        fe_cswap(t2, n2, high);
        fe_cswap(yp, ym, high);
        ge_madd(p, p, ym, yp, n2, a, b);
    }
    WIPE_CTX(&dbl);
    WIPE_BUFFER(a);  WIPE_BUFFER(yp);  WIPE_BUFFER(t2);
    WIPE_BUFFER(b);  WIPE_BUFFER(ym);  WIPE_BUFFER(n2);
    WIPE_BUFFER(s_scalar);
}

void crypto_sign_public_key(u8       public_key[32],
                            const u8 secret_key[32])
{
    u8 a[64];
    HASH(a, secret_key, 32);
    trim_scalar(a);
    ge A;
    ge_scalarmult_base(&A, a);
    ge_tobytes(public_key, &A);
    WIPE_BUFFER(a);
    WIPE_CTX(&A);
}

void crypto_sign_init_first_pass(crypto_sign_ctx *ctx,
                                 const u8  secret_key[32],
                                 const u8  public_key[32])
{
    u8 *a      = ctx->buf;
    u8 *prefix = ctx->buf + 32;
    HASH(a, secret_key, 32);
    trim_scalar(a);

    if (public_key == 0) {
        crypto_sign_public_key(ctx->pk, secret_key);
    } else {
        FOR (i, 0, 32) {
            ctx->pk[i] = public_key[i];
        }
    }

    // Constructs the "random" nonce from the secret key and message.
    // An actual random number would work just fine, and would save us
    // the trouble of hashing the message twice.  If we did that
    // however, the user could fuck it up and reuse the nonce.
    HASH_INIT  (&ctx->hash);
    HASH_UPDATE(&ctx->hash, prefix , 32);
}

void crypto_sign_update(crypto_sign_ctx *ctx, const u8 *msg, size_t msg_size)
{
    HASH_UPDATE(&ctx->hash, msg, msg_size);
}

void crypto_sign_init_second_pass(crypto_sign_ctx *ctx)
{
    u8 *r        = ctx->buf + 32;
    u8 *half_sig = ctx->buf + 64;
    HASH_FINAL(&ctx->hash, r);
    reduce(r);

    // first half of the signature = "random" nonce times basepoint
    ge R;
    ge_scalarmult_base(&R, r);
    ge_tobytes(half_sig, &R);
    WIPE_CTX(&R);

    // Hash R, the public key, and the message together.
    // It cannot be done in parallel with the first hash.
    HASH_INIT  (&ctx->hash);
    HASH_UPDATE(&ctx->hash, half_sig, 32);
    HASH_UPDATE(&ctx->hash, ctx->pk , 32);
}

void crypto_sign_final(crypto_sign_ctx *ctx, u8 signature[64])
{
    u8 *a        = ctx->buf;
    u8 *r        = ctx->buf + 32;
    u8 *half_sig = ctx->buf + 64;
    u8 h_ram[64];
    HASH_FINAL(&ctx->hash, h_ram);
    reduce(h_ram);  // reduce the hash modulo L
    FOR (i, 0, 32) {
        signature[i] = half_sig[i];
    }
    mul_add(signature + 32, h_ram, a, r); // s = h_ram * a + r
    WIPE_CTX(ctx);
    WIPE_BUFFER(h_ram);
}

void crypto_sign(u8        signature[64],
                 const u8  secret_key[32],
                 const u8  public_key[32],
                 const u8 *message, size_t message_size)
{
    crypto_sign_ctx ctx;
    crypto_sign_init_first_pass (&ctx, secret_key, public_key);
    crypto_sign_update          (&ctx, message, message_size);
    crypto_sign_init_second_pass(&ctx);
    crypto_sign_update          (&ctx, message, message_size);
    crypto_sign_final           (&ctx, signature);
}

void crypto_check_init(crypto_check_ctx *ctx,
                      const u8 signature[64],
                      const u8 public_key[32])
{
    FOR (i, 0, 64) { ctx->sig[i] = signature [i]; }
    FOR (i, 0, 32) { ctx->pk [i] = public_key[i]; }
    HASH_INIT  (&ctx->hash);
    HASH_UPDATE(&ctx->hash, signature , 32);
    HASH_UPDATE(&ctx->hash, public_key, 32);
}

void crypto_check_update(crypto_check_ctx *ctx, const u8 *msg, size_t msg_size)
{
    HASH_UPDATE(&ctx->hash, msg , msg_size);
}

int crypto_check_final(crypto_check_ctx *ctx)
{
    ge diff, A;
    u8 h_ram[64], R_check[32];
    u8 *s = ctx->sig + 32;                       // s
    u8 *R = ctx->sig;                            // R
    if (ge_frombytes_neg_vartime(&A, ctx->pk) ||
        is_above_L(s)) { // prevent s malleability
        return -1;
    }
    HASH_FINAL(&ctx->hash, h_ram);
    reduce(h_ram);
    ge_double_scalarmult_vartime(&diff, &A, h_ram, s);
    ge_tobytes(R_check, &diff);                  // R_check = s*B - h_ram*A
    return crypto_verify32(R, R_check);          // R == R_check ? OK : fail
    // No secret, no wipe
}

int crypto_check(const u8  signature[64],
                 const u8  public_key[32],
                 const u8 *message, size_t message_size)
{
    crypto_check_ctx ctx;
    crypto_check_init(&ctx, signature, public_key);
    crypto_check_update(&ctx, message, message_size);
    return crypto_check_final(&ctx);
}

////////////////////
/// Key exchange ///
////////////////////
int crypto_key_exchange(u8       shared_key[32],
                        const u8 your_secret_key [32],
                        const u8 their_public_key[32])
{
    u8 raw_shared_secret[32];
    int status = crypto_x25519(raw_shared_secret,
                               your_secret_key, their_public_key);
    crypto_chacha20_H(shared_key, raw_shared_secret, zero);
    WIPE_BUFFER(raw_shared_secret);
    return status;
}

////////////////////////////////
/// Authenticated encryption ///
////////////////////////////////
static void lock_ad_padding(crypto_lock_ctx *ctx)
{
    if (ctx->ad_phase) {
        ctx->ad_phase = 0;
        crypto_poly1305_update(&ctx->poly, zero, ALIGN(ctx->ad_size, 16));
    }
}

void crypto_lock_init(crypto_lock_ctx *ctx,
                      const u8 key[32], const u8 nonce[24])
{
    u8 auth_key[64]; // "Wasting" the whole Chacha block is faster
    ctx->ad_phase     = 1;
    ctx->ad_size      = 0;
    ctx->message_size = 0;
    crypto_chacha20_x_init(&ctx->chacha, key, nonce);
    crypto_chacha20_stream(&ctx->chacha, auth_key, 64);
    crypto_poly1305_init  (&ctx->poly  , auth_key);
    WIPE_BUFFER(auth_key);
}

void crypto_lock_auth_ad(crypto_lock_ctx *ctx, const u8 *msg, size_t msg_size)
{
    crypto_poly1305_update(&ctx->poly, msg, msg_size);
    ctx->ad_size += msg_size;
}

void crypto_lock_auth_message(crypto_lock_ctx *ctx,
                              const u8 *cipher_text, size_t text_size)
{
    lock_ad_padding(ctx);
    ctx->message_size += text_size;
    crypto_poly1305_update(&ctx->poly, cipher_text, text_size);
}

void crypto_lock_update(crypto_lock_ctx *ctx, u8 *cipher_text,
                        const u8 *plain_text, size_t text_size)
{
    crypto_chacha20_encrypt(&ctx->chacha, cipher_text, plain_text, text_size);
    crypto_lock_auth_message(ctx, cipher_text, text_size);
}

void crypto_lock_final(crypto_lock_ctx *ctx, u8 mac[16])
{
    lock_ad_padding(ctx);
    u8 sizes[16]; // Not secret, not wiped
    store64_le(sizes + 0, ctx->ad_size);
    store64_le(sizes + 8, ctx->message_size);
    crypto_poly1305_update(&ctx->poly, zero, ALIGN(ctx->message_size, 16));
    crypto_poly1305_update(&ctx->poly, sizes, 16);
    crypto_poly1305_final (&ctx->poly, mac);
    WIPE_CTX(ctx);
}

void crypto_unlock_update(crypto_lock_ctx *ctx, u8 *plain_text,
                          const u8 *cipher_text, size_t text_size)
{
    crypto_unlock_auth_message(ctx, cipher_text, text_size);
    crypto_chacha20_encrypt(&ctx->chacha, plain_text, cipher_text, text_size);
}

int crypto_unlock_final(crypto_lock_ctx *ctx, const u8 mac[16])
{
    u8 real_mac[16];
    crypto_lock_final(ctx, real_mac);
    int mismatch = crypto_verify16(real_mac, mac);
    WIPE_BUFFER(real_mac);
    return mismatch;
}

void crypto_lock_aead(u8        mac[16],
                      u8       *cipher_text,
                      const u8  key[32],
                      const u8  nonce[24],
                      const u8 *ad        , size_t ad_size,
                      const u8 *plain_text, size_t text_size)
{
    crypto_lock_ctx ctx;
    crypto_lock_init   (&ctx, key, nonce);
    crypto_lock_auth_ad(&ctx, ad, ad_size);
    crypto_lock_update (&ctx, cipher_text, plain_text, text_size);
    crypto_lock_final  (&ctx, mac);
}

int crypto_unlock_aead(u8       *plain_text,
                       const u8  key[32],
                       const u8  nonce[24],
                       const u8  mac[16],
                       const u8 *ad         , size_t ad_size,
                       const u8 *cipher_text, size_t text_size)
{
    crypto_unlock_ctx ctx;
    crypto_unlock_init        (&ctx, key, nonce);
    crypto_unlock_auth_ad     (&ctx, ad, ad_size);
    crypto_unlock_auth_message(&ctx, cipher_text, text_size);
    crypto_chacha_ctx chacha_ctx = ctx.chacha; // avoid the wiping...
    if (crypto_unlock_final(&ctx, mac)) {      // ...that occurs here
        WIPE_CTX(&chacha_ctx);
        return -1; // reject forgeries before wasting our time decrypting
    }
    crypto_chacha20_encrypt(&chacha_ctx, plain_text, cipher_text, text_size);
    WIPE_CTX(&chacha_ctx);
    return 0;
}

void crypto_lock(u8        mac[16],
                 u8       *cipher_text,
                 const u8  key[32],
                 const u8  nonce[24],
                 const u8 *plain_text, size_t text_size)
{
    crypto_lock_aead(mac, cipher_text, key, nonce, 0, 0, plain_text, text_size);
}

int crypto_unlock(u8       *plain_text,
                  const u8  key[32],
                  const u8  nonce[24],
                  const u8  mac[16],
                  const u8 *cipher_text, size_t text_size)
{
    return crypto_unlock_aead(plain_text, key, nonce, mac, 0, 0,
                              cipher_text, text_size);
}








Added monocypher/monocypher.h version [a867570941].




























































































































































































































































































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#ifndef MONOCYPHER_H
#define MONOCYPHER_H

#include <inttypes.h>
#include <stddef.h>

////////////////////////
/// Type definitions ///
////////////////////////

// Do not rely on the size or content on any of those types,
// they may change without notice.

// Chacha20
typedef struct {
    uint32_t input[16]; // current input, unencrypted
    uint32_t pool [16]; // last input, encrypted
    size_t   pool_idx;  // pointer to random_pool
} crypto_chacha_ctx;

// Poly1305
typedef struct {
    uint32_t r[4];   // constant multiplier (from the secret key)
    uint32_t h[5];   // accumulated hash
    uint32_t c[5];   // chunk of the message
    uint32_t pad[4]; // random number added at the end (from the secret key)
    size_t   c_idx;  // How many bytes are there in the chunk.
} crypto_poly1305_ctx;

// Authenticated encryption
typedef struct {
    crypto_chacha_ctx   chacha;
    crypto_poly1305_ctx poly;
    uint64_t            ad_size;
    uint64_t            message_size;
    int                 ad_phase;
} crypto_lock_ctx;
#define crypto_unlock_ctx crypto_lock_ctx

// Hash (Blake2b)
typedef struct {
    uint64_t hash[8];
    uint64_t input_offset[2];
    uint64_t input[16];
    size_t   input_idx;
    size_t   hash_size;
} crypto_blake2b_ctx;

// Signatures (EdDSA)
#ifdef ED25519_SHA512
    #include "sha512.h"
    typedef crypto_sha512_ctx crypto_hash_ctx;
#else
    typedef crypto_blake2b_ctx crypto_hash_ctx;
#endif
typedef struct {
    crypto_hash_ctx hash;
    uint8_t buf[96];
    uint8_t pk [32];
} crypto_sign_ctx;
typedef struct {
    crypto_hash_ctx hash;
    uint8_t sig[64];
    uint8_t pk [32];
} crypto_check_ctx;


////////////////////////////
/// High level interface ///
////////////////////////////

// Constant time comparisons
// -------------------------

// Return 0 if a and b are equal, -1 otherwise
int crypto_verify16(const uint8_t a[16], const uint8_t b[16]);
int crypto_verify32(const uint8_t a[32], const uint8_t b[32]);
int crypto_verify64(const uint8_t a[64], const uint8_t b[64]);

// Erase sensitive data
// --------------------

// Please erase all copies
void crypto_wipe(void *secret, size_t size);


// Authenticated encryption
// ------------------------

// Direct interface
void crypto_lock(uint8_t        mac[16],
                 uint8_t       *cipher_text,
                 const uint8_t  key[32],
                 const uint8_t  nonce[24],
                 const uint8_t *plain_text, size_t text_size);
int crypto_unlock(uint8_t       *plain_text,
                  const uint8_t  key[32],
                  const uint8_t  nonce[24],
                  const uint8_t  mac[16],
                  const uint8_t *cipher_text, size_t text_size);

// Direct interface with additional data
void crypto_lock_aead(uint8_t        mac[16],
                      uint8_t       *cipher_text,
                      const uint8_t  key[32],
                      const uint8_t  nonce[24],
                      const uint8_t *ad        , size_t ad_size,
                      const uint8_t *plain_text, size_t text_size);
int crypto_unlock_aead(uint8_t       *plain_text,
                       const uint8_t  key[32],
                       const uint8_t  nonce[24],
                       const uint8_t  mac[16],
                       const uint8_t *ad         , size_t ad_size,
                       const uint8_t *cipher_text, size_t text_size);

// Incremental interface (encryption)
void crypto_lock_init(crypto_lock_ctx *ctx,
                      const uint8_t    key[32],
                      const uint8_t    nonce[24]);
void crypto_lock_auth_ad(crypto_lock_ctx *ctx,
                         const uint8_t   *message,
                         size_t           message_size);
void crypto_lock_auth_message(crypto_lock_ctx *ctx,
                              const uint8_t *cipher_text, size_t text_size);
void crypto_lock_update(crypto_lock_ctx *ctx,
                        uint8_t         *cipher_text,
                        const uint8_t   *plain_text,
                        size_t           text_size);
void crypto_lock_final(crypto_lock_ctx *ctx, uint8_t mac[16]);

// Incremental interface (decryption)
#define crypto_unlock_init         crypto_lock_init
#define crypto_unlock_auth_ad      crypto_lock_auth_ad
#define crypto_unlock_auth_message crypto_lock_auth_message
void crypto_unlock_update(crypto_unlock_ctx *ctx,
                          uint8_t           *plain_text,
                          const uint8_t     *cipher_text,
                          size_t             text_size);
int crypto_unlock_final(crypto_unlock_ctx *ctx, const uint8_t mac[16]);


// General purpose hash (Blake2b)
// ------------------------------

// Direct interface
void crypto_blake2b(uint8_t hash[64],
                    const uint8_t *message, size_t message_size);

void crypto_blake2b_general(uint8_t       *hash    , size_t hash_size,
                            const uint8_t *key     , size_t key_size, // optional
                            const uint8_t *message , size_t message_size);

// Incremental interface
void crypto_blake2b_init  (crypto_blake2b_ctx *ctx);
void crypto_blake2b_update(crypto_blake2b_ctx *ctx,
                           const uint8_t *message, size_t message_size);
void crypto_blake2b_final (crypto_blake2b_ctx *ctx, uint8_t *hash);

void crypto_blake2b_general_init(crypto_blake2b_ctx *ctx, size_t hash_size,
                                 const uint8_t      *key, size_t key_size);


// Password key derivation (Argon2 i)
// ----------------------------------
void crypto_argon2i(uint8_t       *hash,      uint32_t hash_size,     // >= 4
                    void          *work_area, uint32_t nb_blocks,     // >= 8
                    uint32_t       nb_iterations,                     // >= 1
                    const uint8_t *password,  uint32_t password_size,
                    const uint8_t *salt,      uint32_t salt_size);

void crypto_argon2i_general(uint8_t       *hash,      uint32_t hash_size,// >= 4
                            void          *work_area, uint32_t nb_blocks,// >= 8
                            uint32_t       nb_iterations,                // >= 1
                            const uint8_t *password,  uint32_t password_size,
                            const uint8_t *salt,      uint32_t salt_size,// >= 8
                            const uint8_t *key,       uint32_t key_size,
                            const uint8_t *ad,        uint32_t ad_size);


// Key exchange (x25519 + HChacha20)
// ---------------------------------
#define crypto_key_exchange_public_key crypto_x25519_public_key
int crypto_key_exchange(uint8_t       shared_key      [32],
                        const uint8_t your_secret_key [32],
                        const uint8_t their_public_key[32]);


// Signatures (EdDSA with curve25519 + Blake2b)
// --------------------------------------------

// Generate public key
void crypto_sign_public_key(uint8_t        public_key[32],
                            const uint8_t  secret_key[32]);

// Direct interface
void crypto_sign(uint8_t        signature [64],
                 const uint8_t  secret_key[32],
                 const uint8_t  public_key[32], // optional, may be 0
                 const uint8_t *message, size_t message_size);
int crypto_check(const uint8_t  signature [64],
                 const uint8_t  public_key[32],
                 const uint8_t *message, size_t message_size);

// Incremental interface for signatures (2 passes)
void crypto_sign_init_first_pass(crypto_sign_ctx *ctx,
                                 const uint8_t  secret_key[32],
                                 const uint8_t  public_key[32]);
void crypto_sign_update(crypto_sign_ctx *ctx,
                        const uint8_t *message, size_t message_size);
void crypto_sign_init_second_pass(crypto_sign_ctx *ctx);
// use crypto_sign_update() again.
void crypto_sign_final(crypto_sign_ctx *ctx, uint8_t signature[64]);

// Incremental interface for verification (1 pass)
void crypto_check_init  (crypto_check_ctx *ctx,
                         const uint8_t signature[64],
                         const uint8_t public_key[32]);
void crypto_check_update(crypto_check_ctx *ctx,
                         const uint8_t *message, size_t message_size);
int crypto_check_final  (crypto_check_ctx *ctx);


////////////////////////////
/// Low level primitives ///
////////////////////////////

// For experts only.  You have been warned.


// Chacha20
// --------

// Specialised hash.
void crypto_chacha20_H(uint8_t       out[32],
                       const uint8_t key[32],
                       const uint8_t in [16]);

void crypto_chacha20_init(crypto_chacha_ctx *ctx,
                          const uint8_t      key[32],
                          const uint8_t      nonce[8]);

void crypto_chacha20_x_init(crypto_chacha_ctx *ctx,
                            const uint8_t      key[32],
                            const uint8_t      nonce[24]);

void crypto_chacha20_set_ctr(crypto_chacha_ctx *ctx, uint64_t ctr);

void crypto_chacha20_encrypt(crypto_chacha_ctx *ctx,
                             uint8_t           *cipher_text,
                             const uint8_t     *plain_text,
                             size_t             text_size);

void crypto_chacha20_stream(crypto_chacha_ctx *ctx,
                            uint8_t *stream, size_t size);


// Poly 1305
// ---------

// Direct interface
void crypto_poly1305(uint8_t        mac[16],
                     const uint8_t *message, size_t message_size,
                     const uint8_t  key[32]);

// Incremental interface
void crypto_poly1305_init  (crypto_poly1305_ctx *ctx, const uint8_t key[32]);
void crypto_poly1305_update(crypto_poly1305_ctx *ctx,
                            const uint8_t *message, size_t message_size);
void crypto_poly1305_final (crypto_poly1305_ctx *ctx, uint8_t mac[16]);


// X-25519
// -------
void crypto_x25519_public_key(uint8_t       public_key[32],
                              const uint8_t secret_key[32]);
int crypto_x25519(uint8_t       raw_shared_secret[32],
                  const uint8_t your_secret_key  [32],
                  const uint8_t their_public_key [32]);

#endif // MONOCYPHER_H








Added monocypher/version version [e41df87aa4].





1

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2.0.5








Modified nano.c
from [6d823f4967]
to [3e25e24c1a].






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/* XXX:TODO: OpenMP support is currently incomplete */
#undef NANO_TCL_HAVE_OPENMP

#include <stdint.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <tcl.h>
#ifdef NANO_TCL_HAVE_OPENMP
#  include <omp.h>
#endif

#include "randombytes.h"
#include "tweetnacl.h"
#include "blake2.h"
#include "monocypher.h"
#include "argon2.h"

#define NANO_SECRET_KEY_LENGTH (crypto_sign_SECRETKEYBYTES - crypto_sign_PUBLICKEYBYTES)
#define NANO_PUBLIC_KEY_LENGTH (crypto_sign_PUBLICKEYBYTES)
#define NANO_SECRET_KEY_LENGTH 32
#define NANO_PUBLIC_KEY_LENGTH 32
#define NANO_BLOCK_HASH_LENGTH 32
#define NANO_BLOCK_SIGNATURE_LENGTH crypto_sign_BYTES
#define NANO_BLOCK_SIGNATURE_LENGTH 64
#define NANO_WORK_VALUE_LENGTH 8
#define NANO_WORK_HASH_LENGTH  8
#define NANO_WORK_DEFAULT_MIN  0xffffffc000000000LLU

#define TclNano_AttemptAlloc(x) ((void *) Tcl_AttemptAlloc(x))
#define TclNano_Free(x) Tcl_Free((char *) x)
#define TclNano_SetIntVar(interp, name, intValue) \




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#define TclNano_PkgProvide(interp, name, version) \
	tclcmd_ret = Tcl_PkgProvide(interp, name, version); \
	if (tclcmd_ret != TCL_OK) { \
		return(tclcmd_ret); \
	}

static unsigned char *nano_parse_secret_key(Tcl_Obj *secret_key_only_obj, int *out_key_length) {
	unsigned char *secret_key, *public_key, *secret_key_only;
	int secret_key_length, secret_key_only_length;
	unsigned char *public_key, *secret_key_only;
	int public_key_length, secret_key_only_length;

	secret_key_only = Tcl_GetByteArrayFromObj(secret_key_only_obj, &secret_key_only_length);
	if (secret_key_only_length != NANO_SECRET_KEY_LENGTH) {
		return(NULL);
	}

	if ((NANO_SECRET_KEY_LENGTH + NANO_PUBLIC_KEY_LENGTH) != crypto_sign_SECRETKEYBYTES) {
	public_key_length = NANO_PUBLIC_KEY_LENGTH;
		return(NULL);
	}

	secret_key_length = crypto_sign_SECRETKEYBYTES;
	secret_key = TclNano_AttemptAlloc(secret_key_length);
	if (!secret_key) {
	public_key = TclNano_AttemptAlloc(public_key_length);
	if (!public_key) {
		return(NULL);
	}

	memcpy(secret_key, secret_key_only, secret_key_only_length);
	public_key = secret_key + secret_key_only_length;
	crypto_sign_keypair(public_key, secret_key, 0);
	crypto_sign_public_key(public_key, secret_key_only);

	*out_key_length = secret_key_length;
	return(secret_key);
	*out_key_length = public_key_length;
	return(public_key);
}

static int nano_tcl_generate_keypair(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	unsigned char secret_key[crypto_sign_SECRETKEYBYTES], public_key[crypto_sign_PUBLICKEYBYTES];
	unsigned char secret_key[NANO_SECRET_KEY_LENGTH], public_key[NANO_PUBLIC_KEY_LENGTH];
	unsigned char *seed, *buffer, buffer_s[NANO_SECRET_KEY_LENGTH + 4];
	long seed_index;
	int seed_length, buffer_length;
	int csk_ret, tglfo_ret;
	int tglfo_ret;

	if (objc != 1 && objc != 3) {
		Tcl_WrongNumArgs(interp, 1, objv, "?seed index?");

		return(TCL_ERROR);
	}

	if (objc == 1) {
		csk_ret = crypto_sign_keypair(public_key, secret_key, 1);
		randombytes(secret_key, NANO_SECRET_KEY_LENGTH);
		if (csk_ret != 0) {
			Tcl_SetResult(interp, "Internal error", NULL);

		crypto_sign_public_key(public_key, secret_key);
			return(TCL_ERROR);
		}
	} else {
		seed = Tcl_GetByteArrayFromObj(objv[1], &seed_length);
		if (seed_length != NANO_SECRET_KEY_LENGTH) {
			Tcl_SetResult(interp, "Seed is not the right size", NULL);

			return(TCL_ERROR);
		}




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		buffer += seed_length;
		buffer[0] = (seed_index >> 24) & 0xff;
		buffer[1] = (seed_index >> 16) & 0xff;
		buffer[2] = (seed_index >> 8) & 0xff;
		buffer[3] = seed_index & 0xff;
		buffer -= seed_length;

		blake2b(secret_key, NANO_SECRET_KEY_LENGTH, buffer, buffer_length, NULL, 0);
		crypto_blake2b_general(secret_key, NANO_SECRET_KEY_LENGTH, NULL, 0, buffer, buffer_length);
	}

	Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(secret_key, NANO_SECRET_KEY_LENGTH));

	return(TCL_OK);

	/* NOTREACH */




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	public_key = TclNano_AttemptAlloc(public_key_length);
	if (!public_key) {
		Tcl_SetResult(interp, "Internal error", NULL);

		return(TCL_ERROR);
	}

	crypto_sign_keypair(public_key, secret_key, 0);
	crypto_sign_public_key(public_key, secret_key);

	Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(public_key, public_key_length));

	TclNano_Free(public_key);

	return(TCL_OK);

	/* NOTREACH */
	clientData = clientData;
}

static int nano_tcl_sign_detached(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	int cs_ret;
	unsigned char *signature, *data, *secret_key;
	unsigned char *signature, *data, *secret_key, *public_key;
	unsigned long long signature_length;
	int data_length, secret_key_length;
	int data_length, public_key_length, secret_key_length;

	if (objc != 3) {
		Tcl_WrongNumArgs(interp, 1, objv, "data secretKey");

		return(TCL_ERROR);
	}

	data = Tcl_GetByteArrayFromObj(objv[1], &data_length);
	signature_length = data_length + NANO_BLOCK_SIGNATURE_LENGTH;
	if (signature_length >= UINT_MAX) {
		Tcl_SetResult(interp, "Input message too long", NULL);
	signature_length = NANO_BLOCK_SIGNATURE_LENGTH;

	secret_key = Tcl_GetByteArrayFromObj(objv[2], &secret_key_length);
	if (secret_key_length != NANO_SECRET_KEY_LENGTH) {
		Tcl_SetResult(interp, "Secret key is not the right size", NULL);

		return(TCL_ERROR);
	}

	secret_key = nano_parse_secret_key(objv[2], &secret_key_length);
	public_key = nano_parse_secret_key(objv[2], &public_key_length);
	if (!secret_key) {
		Tcl_SetResult(interp, "Secret key is not the right size", NULL);

		return(TCL_ERROR);
	}

	signature = TclNano_AttemptAlloc(signature_length);
	if (!signature) {
		TclNano_Free(secret_key);
		TclNano_Free(public_key);

		Tcl_SetResult(interp, "Unable to allocate memory", NULL);

		return(TCL_ERROR);
	}

	cs_ret = crypto_sign(signature, &signature_length, data, data_length, secret_key);
	if (cs_ret != 0) {
		TclNano_Free(secret_key);
		TclNano_Free(signature);

	crypto_sign(signature, secret_key, public_key, data, data_length);
		Tcl_SetResult(interp, "crypto_sign failed", NULL);

		return(TCL_ERROR);
	}

	Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(signature, NANO_BLOCK_SIGNATURE_LENGTH));

	TclNano_Free(signature);
	TclNano_Free(secret_key);
	TclNano_Free(public_key);

	return(TCL_OK);

	/* NOTREACH */
	clientData = clientData;
}

static int nano_tcl_verify_detached(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	int cso_ret;
	unsigned char *signature, *data, *signed_data, *verify_data, *public_key;
	int signature_length, data_length, signed_data_length, verify_data_length, public_key_length;
	int cc_ret;
	unsigned char *signature, *data, *public_key;
	int signature_length, data_length, public_key_length;
	unsigned long long verify_data_length_nacl;
	int result;

	if (objc != 4) {
		Tcl_WrongNumArgs(interp, 1, objv, "data signature publicKey");

		return(TCL_ERROR);
	}




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	public_key = Tcl_GetByteArrayFromObj(objv[3], &public_key_length);
	if (public_key_length != NANO_PUBLIC_KEY_LENGTH) {
		Tcl_SetResult(interp, "Public key is not the right size", NULL);

		return(TCL_ERROR);
	}

	signed_data_length = data_length + signature_length;
	signed_data = TclNano_AttemptAlloc(signed_data_length);
	if (!signed_data) {
		Tcl_SetResult(interp, "Internal error", NULL);

	cc_ret = crypto_check(signature, public_key, data, data_length);
		return(TCL_ERROR);
	}

	memcpy(signed_data, signature, signature_length);
	memcpy(signed_data + signature_length, data, data_length);

	verify_data_length = signed_data_length;
	verify_data = TclNano_AttemptAlloc(verify_data_length);
	if (!verify_data) {
		TclNano_Free(verify_data);

		Tcl_SetResult(interp, "Internal error", NULL);

		return(TCL_ERROR);
	}

	verify_data_length_nacl = verify_data_length;
	cso_ret = crypto_sign_open(verify_data, &verify_data_length_nacl, signed_data, signed_data_length, public_key);
	result = 0;
	if (cso_ret == 0) {
	if (!cc_ret) {
		result = 1;
	}

	TclNano_Free(signed_data);
	TclNano_Free(verify_data);

	Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));

	return(TCL_OK);

	/* NOTREACH */
	clientData = clientData;
}

#if 0
static int nano_tcl_derive_key_from_password(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	argon2_context argon2_context_item;

	if (objc != 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "password");

		return(TCL_ERROR);
	}

unsigned char password[] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}
unsigned char salt[] = {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02}
unsigned char secret[] = {0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03}
unsigned char ad[] = {0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04}
unsigned char phd[] = {0x24, 0xfd, 0xe9, 0x5a, 0x9d, 0xf5, 0x49, 0xd0, 0x02, 0xbd, 0x21, 0xb8, 0xb3, 0x45, 0x57, 0xe0, 0xf2, 0x53, 0x03, 0xd6, 0x53, 0x12, 0xf4, 0xc0, 0x7e, 0x1b, 0x0f, 0x12, 0x75, 0xb3, 0xe9, 0xd9, 0x45, 0xe9, 0x7b, 0x66, 0xbf, 0xe4, 0x27, 0x20, 0x6e, 0xca, 0xc7, 0xea, 0x2f, 0xfb, 0x1b, 0xe2, 0xc8, 0x3a, 0x15, 0xa6, 0x64, 0xb2, 0x4b, 0x4f, 0x6b, 0xc3, 0x34, 0x0d, 0x24, 0x89, 0x0b, 0x13}
unsigned char final_tag[] = {0xf8, 0x7c, 0x95, 0x96, 0xbd, 0xbf, 0x75, 0x0b, 0xfb, 0x35, 0x3a, 0x89, 0x70, 0xe5, 0x44, 0x1a, 0x70, 0x24, 0x3e, 0xb4, 0x90, 0x30, 0xdf, 0xe2, 0x74, 0xd9, 0xad, 0x4e, 0x37, 0x0e, 0x38, 0x9b}

argon2_context_item.pwd = password;
argon2_context_item.pwdlen = sizeof(password);
argon2_context_item.salt = salt;
argon2_context_item.saltlen = sizeof(salt);
argon2_context_item.secret = secret;
argon2_context_item.secretlen = sizeof(secret);
argon2_context_item.ad = ad;
argon2_context_item.adlen = sizeof(ad);
argon2_context_item.t_cost = 3;
argon2_context_item.m_cost = 16;
argon2_context_item.lanes = 4;
argon2_context_item.threads = 4;
argon2_context_item.version = ARGON2_VERSION_NUMBER;
argon2_context_item.allocate_cbk = NULL;
argon2_context_item.free_cbk = NULL;
argon2_context_item.flags = 0;

}
#endif

static int nano_tcl_hash_data(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	unsigned char *data, result[NANO_BLOCK_SIGNATURE_LENGTH];
	int tgifo_ret;
	int data_length, result_length;

	if (objc < 2 || objc > 3) {
		Tcl_WrongNumArgs(interp, 1, objv, "data ?hashLength?");




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		if (result_length > sizeof(result)) {
			Tcl_SetResult(interp, "Hash length too large", NULL);

			return(TCL_ERROR);
		}

		blake2b(result, result_length, data, data_length, NULL, 0);
		crypto_blake2b_general(result, result_length, NULL, 0, data, data_length);
	} else {
		/*
		 * Default to the same as the cryptographic primitive
		 */
		crypto_hash(result, data, data_length);
		crypto_blake2b(result, data, data_length);
		result_length = NANO_BLOCK_SIGNATURE_LENGTH;
	}

	Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(result, result_length));

	return(TCL_OK);

	/* NOTREACH */
	clientData = clientData;
}

static int nano_validate_work(const unsigned char *blockhash, const unsigned char *work, uint64_t workMin) {
	unsigned char workReversed[NANO_WORK_VALUE_LENGTH], workCheck[NANO_WORK_HASH_LENGTH];
	unsigned int idxIn, idxOut;
	blake2b_state workhash_state;
	crypto_blake2b_ctx workhash_state;
	uint64_t workValue;
	int blake2_ret;

	idxIn = sizeof(workReversed) - 1;
	idxOut = 0;
	while (idxOut < sizeof(workReversed)) {
		workReversed[idxOut] = work[idxIn];
		idxOut++;
		idxIn--;
	}

	blake2_ret = blake2b_init(&workhash_state, sizeof(workCheck));
	crypto_blake2b_general_init(&workhash_state, sizeof(workCheck), NULL, 0);
	if (blake2_ret != 0) {
		return(0);
	}

	blake2_ret = blake2b_update(&workhash_state, workReversed, sizeof(workReversed));
	crypto_blake2b_update(&workhash_state, workReversed, sizeof(workReversed));
	if (blake2_ret != 0) {
		return(0);
	}

	blake2_ret = blake2b_update(&workhash_state, blockhash, NANO_BLOCK_HASH_LENGTH);
	crypto_blake2b_update(&workhash_state, blockhash, NANO_BLOCK_HASH_LENGTH);
	if (blake2_ret != 0) {
		return(0);
	}

	blake2_ret = blake2b_final(&workhash_state, workCheck, sizeof(workCheck));
	crypto_blake2b_final(&workhash_state, workCheck);
	if (blake2_ret != 0) {
		return(0);
	}

	workValue = 0;
	for (idxIn = sizeof(workCheck); idxIn > 0; idxIn--) {
		workValue <<= 8;
		workValue |= workCheck[idxIn - 1];
	}





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static void nano_generate_work(const unsigned char *blockhash, unsigned char *workOut, uint64_t workMin) {
	unsigned char work[NANO_WORK_VALUE_LENGTH];
	unsigned int offset;
	int work_valid;

	memcpy(work, blockhash, sizeof(work));

#pragma omp target map(tofrom:work)
/* XXX:TODO: INCOMPLETE OpenMP support #pragma omp target map(tofrom:work) */
	while (1) {
		work_valid = nano_validate_work(blockhash, work, workMin);
		if (work_valid) {
			break;
		}

		offset = 0;




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	TclNano_CreateObjCommand(interp, "::nano::internal::selfTest", nano_tcl_self_test);
	TclNano_CreateObjCommand(interp, "::nano::internal::generateKey", nano_tcl_generate_keypair);
	TclNano_CreateObjCommand(interp, "::nano::internal::generateSeed", nano_tcl_generate_seed);
	TclNano_CreateObjCommand(interp, "::nano::internal::publicKey", nano_tcl_secret_key_to_public_key);
	TclNano_CreateObjCommand(interp, "::nano::internal::signDetached", nano_tcl_sign_detached);
	TclNano_CreateObjCommand(interp, "::nano::internal::verifyDetached", nano_tcl_verify_detached);
	TclNano_CreateObjCommand(interp, "::nano::internal::hashData", nano_tcl_hash_data);
//	TclNano_CreateObjCommand(interp, "::nano::internal::deriveKeyFromPassword", nano_tcl_derive_key_from_password);
	TclNano_CreateObjCommand(interp, "::nano::internal::validateWork", nano_tcl_validate_work);
	TclNano_CreateObjCommand(interp, "::nano::internal::generateWork", nano_tcl_generate_work);
	TclNano_CreateObjCommand(interp, "::nano::internal::randomBytes", nano_tcl_random_bytes);

	TclNano_Eval(interp, nanoInitScript);

	TclNano_PkgProvide(interp, "nano", PACKAGE_VERSION);

	return(TCL_OK);
}















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