tcl-extensions

#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for sample 0.5.
#
#
# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
#
#
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.

LIBOBJS=
cross_compiling=no
subdirs=
MFLAGS=
MAKEFLAGS=

# Identity of this package.
PACKAGE_NAME='sample'
PACKAGE_TARNAME='sample'
PACKAGE_VERSION='0.5'
PACKAGE_STRING='sample 0.5'
PACKAGE_BUGREPORT=''
PACKAGE_URL=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H

pdfdir
dvidir
htmldir
infodir
docdir
oldincludedir
includedir

localstatedir
sharedstatedir
sysconfdir
datadir
datarootdir
libexecdir
sbindir

sbindir='${exec_prefix}/sbin'
libexecdir='${exec_prefix}/libexec'
datarootdir='${prefix}/share'
datadir='${datarootdir}'
sysconfdir='${prefix}/etc'
sharedstatedir='${prefix}/com'
localstatedir='${prefix}/var'

includedir='${prefix}/include'
oldincludedir='/usr/include'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
infodir='${datarootdir}/info'
htmldir='${docdir}'
dvidir='${docdir}'
pdfdir='${docdir}'

    ac_prev=psdir ;;
  -psdir=* | --psdir=* | --psdi=* | --psd=* | --ps=*)
    psdir=$ac_optarg ;;

  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
  | -silent | --silent | --silen | --sile | --sil)
    silent=yes ;;










  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
    ac_prev=sbindir ;;
  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
  | --sbi=* | --sb=*)
    sbindir=$ac_optarg ;;

  esac
fi

# Check all directory arguments for consistency.
for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
		datadir sysconfdir sharedstatedir localstatedir includedir \
		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
		libdir localedir mandir
do
  eval ac_val=\$$ac_var
  # Remove trailing slashes.
  case $ac_val in
    */ )
      ac_val=`expr "X$ac_val" : 'X\(.*[^/]\)' \| "X$ac_val" : 'X\(.*\)'`
      eval $ac_var=\$ac_val;;

#
# Report the --help message.
#
if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
\`configure' configures sample 0.5 to adapt to many kinds of systems.

Usage: $0 [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.

Fine tuning of the installation directories:
  --bindir=DIR            user executables [EPREFIX/bin]
  --sbindir=DIR           system admin executables [EPREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]

  --libdir=DIR            object code libraries [EPREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
  --infodir=DIR           info documentation [DATAROOTDIR/info]
  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
  --mandir=DIR            man documentation [DATAROOTDIR/man]
  --docdir=DIR            documentation root [DATAROOTDIR/doc/sample]
  --htmldir=DIR           html documentation [DOCDIR]
  --dvidir=DIR            dvi documentation [DOCDIR]
  --pdfdir=DIR            pdf documentation [DOCDIR]
  --psdir=DIR             ps documentation [DOCDIR]
_ACEOF

  cat <<\_ACEOF
_ACEOF
fi

if test -n "$ac_init_help"; then
  case $ac_init_help in
     short | recursive ) echo "Configuration of sample 0.5:";;
   esac
  cat <<\_ACEOF

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]

    cd "$ac_pwd" || { ac_status=$?; break; }
  done
fi

test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
  cat <<\_ACEOF
sample configure 0.5
generated by GNU Autoconf 2.69

Copyright (C) 2012 Free Software Foundation, Inc.
This configure script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it.
_ACEOF
  exit

  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

} # ac_fn_c_check_header_mongrel
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by sample $as_me 0.5, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{

as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
  IFS=$as_save_IFS
  test -z "$as_dir" && as_dir=.
    for ac_exec_ext in '' $ac_executable_extensions; do
  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
    ac_cv_prog_CYGPATH="cygpath -w"
    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
    break 2
  fi
done
  done
IFS=$as_save_IFS

fi


	    EXEEXT=".exe"
	    TEA_PLATFORM="windows"
	    ;;
	*CYGWIN_*)
	    CYGPATH=echo
	    EXEEXT=".exe"
	    # TEA_PLATFORM is determined later in LOAD_TCLCONFIG
	    ;;
	*)
	    CYGPATH=echo
	    # Maybe we are cross-compiling....
	    case ${host_alias} in
		*mingw32*)
		EXEEXT=".exe"

	    #endif

  ;
  return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :

  TEA_PLATFORM="unix"


else

  TEA_PLATFORM="windows"







































fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
    CC=$hold_cc
    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TEA_PLATFORM" >&5
$as_echo "$TEA_PLATFORM" >&6; }

# stub library C source files to compile in TEA_ADD_STUB_SOURCES,
# and runtime Tcl library files in TEA_ADD_TCL_SOURCES.
# This defines PKG(_STUB)_SOURCES, PKG(_STUB)_OBJECTS, PKG_HEADERS
# and PKG_TCL_SOURCES.
#-----------------------------------------------------------------------


    vars="sample.c tclsample.c"
    for i in $vars; do
	case $i in
	    \$*)
		# allow $-var names
		PKG_SOURCES="$PKG_SOURCES $i"
		PKG_OBJECTS="$PKG_OBJECTS $i"
		;;

	    if test "$GCC" != "yes" ; then
	        if test "${SHARED_BUILD}" = "0" ; then
		    runtime=-MT
	        else
		    runtime=-MD
	        fi
	        case "x`echo \${VisualStudioVersion}`" in
	            x14*)
		        lflags="${lflags} -nodefaultlib:libucrt.lib"

    vars="ucrt.lib"
    for i in $vars; do
	if test "${TEA_PLATFORM}" = "windows" -a "$GCC" = "yes" ; then
	    # Convert foo.lib to -lfoo for GCC.  No-op if not *.lib
	    i=`echo "$i" | sed -e 's/^\([^-].*\)\.lib$/-l\1/i'`

test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1

cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# Save the log message, to keep $0 and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by sample $as_me 0.5, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
  CONFIG_HEADERS  = $CONFIG_HEADERS
  CONFIG_LINKS    = $CONFIG_LINKS
  CONFIG_COMMANDS = $CONFIG_COMMANDS
  $ $0 $@

Report bugs to the package provider."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
sample config.status 0.5
configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

Copyright (C) 2012 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."

# This initializes the environment with PACKAGE_NAME and PACKAGE_VERSION
# set as provided.  These will also be added as -D defs in your Makefile
# so you can encode the package version directly into the source files.
# This will also define a special symbol for Windows (BUILD_<PACKAGE_NAME>
# so that we create the export library with the dll.
#-----------------------------------------------------------------------

AC_INIT([sample], [0.5])

#--------------------------------------------------------------------
# Call TEA_INIT as the first TEA_ macro to set up initial vars.
# This will define a ${TEA_PLATFORM} variable == "unix" or "windows"
# as well as PKG_LIB_FILE and PKG_STUB_LIB_FILE.
#--------------------------------------------------------------------

# public headers that need to be installed in TEA_ADD_HEADERS,
# stub library C source files to compile in TEA_ADD_STUB_SOURCES,
# and runtime Tcl library files in TEA_ADD_TCL_SOURCES.
# This defines PKG(_STUB)_SOURCES, PKG(_STUB)_OBJECTS, PKG_HEADERS
# and PKG_TCL_SOURCES.
#-----------------------------------------------------------------------

TEA_ADD_SOURCES([sample.c tclsample.c])
TEA_ADD_HEADERS([])
TEA_ADD_INCLUDES([])
TEA_ADD_LIBS([])
TEA_ADD_CFLAGS([])
TEA_ADD_STUB_SOURCES([])
TEA_ADD_TCL_SOURCES([])

/*
 * sample.c --
 *
 *	This file implements a secure hashing algorithm
 *
 * Copyright (c) 1999 Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 */

/*
 * SHA-1 in C
 * By Steve Reid <steve@edmweb.com>
 * 100% Public Domain
 *
 * Test Vectors (from FIPS PUB 180-1)
 * "abc"
 *   A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
 *   84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
 * A million repetitions of "a"
 *   34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
 */

/*
 * If byte order known, #define LITTLE_ENDIAN or BIG_ENDIAN to be faster
 */

/*
 * Copy data before messing with it.
 * #define SHA1HANDSOFF
 */

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "sample.h"

#define Rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))

/*
 * Blk0() and Blk() perform the initial expand.
 * I got the idea of expanding during the round function from SSLeay
 */

#ifdef LITTLE_ENDIAN
#define Blk0(i) (block->l[i] = (Rol(block->l[i],24)&0xFF00FF00) \
    |(Rol(block->l[i],8)&0x00FF00FF))
#else
#ifdef BIG_ENDIAN
#define Blk0(i) block->l[i]
#else

/*
 * for unknown byte order, to work with either
 * results in no change on big endian machines
 * added by Dave Dykstra, 4/16/97
 */

#define Blk0(i) (p = (unsigned char *) (&block->l[i]), \
		block->l[i] = (*p << 24) \
		+ (*(p+1) << 16) + (*(p+2) << 8) + *(p+3))
#endif
#endif
#define Blk(i) (block->l[i&15] = Rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
    ^block->l[(i+2)&15]^block->l[i&15],1))

/*
 * (R0+R1), R2, R3, R4 are the different operations used in SHA1
 */

#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+Blk0(i)+0x5A827999+Rol(v,5);w=Rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+Blk(i)+0x5A827999+Rol(v,5);w=Rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+Blk(i)+0x6ED9EBA1+Rol(v,5);w=Rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+Blk(i)+0x8F1BBCDC+Rol(v,5);w=Rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+Blk(i)+0xCA62C1D6+Rol(v,5);w=Rol(w,30);

/*
 *----------------------------------------------------------------------
 *
 * SHA1Transform
 *
 *	Hash a single 512-bit block. This is the core of the algorithm.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Contents of state pointer are changed.
 *
 *----------------------------------------------------------------------
 */

void
SHA1Transform(state, buffer)
    sha_uint32_t state[5];	/* State variable */
    unsigned char buffer[64];	/* Modified buffer */
{
#if (!defined(BIG_ENDIAN) && !defined(LITTLE_ENDIAN))
    unsigned char *p;
#endif
    sha_uint32_t a, b, c, d, e;
    typedef union {
	unsigned char c[64];
	sha_uint32_t l[16];
    } CHAR64LONG16;
    CHAR64LONG16* block;

#ifdef SHA1HANDSOFF
    static unsigned char workspace[64];
    block = (CHAR64LONG16*)workspace;
    memcpy(block, buffer, 64);
#else
    block = (CHAR64LONG16*)buffer;
#endif

    assert(sizeof(block->c) == sizeof(block->l));

    /*
     * Copy context->state[] to working vars
     */

    a = state[0];
    b = state[1];
    c = state[2];
    d = state[3];
    e = state[4];

    /*
     * 4 rounds of 20 operations each. Loop unrolled.
     */

    R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
    R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
    R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
    R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
    R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
    R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
    R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
    R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
    R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
    R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
    R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
    R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
    R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
    R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
    R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
    R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
    R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
    R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
    R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
    R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);

    /*
     * Add the working vars back into context.state[]
     */

    state[0] += a;
    state[1] += b;
    state[2] += c;
    state[3] += d;
    state[4] += e;

    /*
     * Wipe variables
     */

    a = b = c = d = e = 0;

    return;
}

/*
 *----------------------------------------------------------------------
 *
 * SHA1Init --
 *
 *	 Initialize new context
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Contents of context pointer are changed.
 *
 *----------------------------------------------------------------------
 */

void SHA1Init(context)
    SHA1_CTX* context;		/* Context to initialize */
{
    /*
     * SHA1 initialization constants
     */

    context->state[0] = 0x67452301;
    context->state[1] = 0xEFCDAB89;
    context->state[2] = 0x98BADCFE;
    context->state[3] = 0x10325476;
    context->state[4] = 0xC3D2E1F0;
    context->count[0] = context->count[1] = 0;

    return;
}

/*
 *----------------------------------------------------------------------
 *
 * SHA1Update
 *
 *	 Updates a context.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Contents of context pointer are changed.
 *
 *----------------------------------------------------------------------
 */

void
SHA1Update(context, data, len)
    SHA1_CTX* context;		/* Context to update */
    unsigned char* data;	/* Data used for update */
    unsigned int len;		/* Length of data */
{
    unsigned int i, j;

    j = (context->count[0] >> 3) & 63;
    if ((context->count[0] += len << 3) < (len << 3)) {
	context->count[1]++;
    }
    context->count[1] += (len >> 29);
    if ((j + len) > 63) {
        memcpy(&context->buffer[j], data, (i = 64-j));
        SHA1Transform(context->state, context->buffer);
        for ( ; i + 63 < len; i += 64) {
#ifdef CANWRITEDATA
            SHA1Transform(context->state, &data[i]);
#else

	    /*
	     * else case added by Dave Dykstra 4/22/97
	     */

	    memcpy(&context->buffer[0], &data[i], 64);
            SHA1Transform(context->state, context->buffer);
#endif
        }
        j = 0;
    } else {
	i = 0;
    }

    memcpy(&context->buffer[j], &data[i], len - i);

    return;
}

/*
 *----------------------------------------------------------------------
 *
 * SHA1Final
 *
 *	Add padding and return the message digest.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Contents of context pointer are changed.
 *
 *----------------------------------------------------------------------
 */

void SHA1Final(context, digest)
    SHA1_CTX* context;		/* Context to pad */
    unsigned char digest[20];	/* Returned message digest */
{
    sha_uint32_t i, j;
    unsigned char finalcount[8];

    for (i = 0; i < 8; i++) {
	/*
	 * This statement is independent of the endianness
	 */

        finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
		>> ((3-(i & 3)) * 8) ) & 255);
    }
    SHA1Update(context, (unsigned char *)"\200", 1);
    while ((context->count[0] & 504) != 448) {
        SHA1Update(context, (unsigned char *)"\0", 1);
    }

    /*
     * Should cause a SHA1Transform()
     */

    SHA1Update(context, finalcount, 8);
    for (i = 0; i < 20; i++) {
        digest[i] = (unsigned char)
		((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
    }

    /*
     * Wipe variables
     */

    i = j = 0;
    memset(context, 0, sizeof(SHA1_CTX));
    memset(&finalcount, 0, 8);

    /*
     * Make SHA1Transform overwrite it's own static vars.
     */

#ifdef SHA1HANDSOFF
    SHA1Transform(context->state, context->buffer);
#endif

    return;
}

/*
 * sample.h --
 *
 *	This header file contains the function declarations needed for
 *	all of the source files in this package.
 *
 * Copyright (c) 1998-1999 Scriptics Corporation.
 * Copyright (c) 2003 ActiveState Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 */

#ifndef _SAMPLE
#define _SAMPLE

#include <tcl.h>

#ifdef HAVE_INTTYPES_H
#   include <inttypes.h>
typedef uint32_t sha_uint32_t;
#else
#   if ((1<<31)<0)
typedef unsigned long sha_uint32_t;
#   else
typedef unsigned int sha_uint32_t;
#   endif
#endif

/*
 * For C++ compilers, use extern "C"
 */

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    sha_uint32_t state[5];
    sha_uint32_t count[2];
    unsigned char buffer[64];
} SHA1_CTX;

MODULE_SCOPE void SHA1Init(SHA1_CTX* context);
MODULE_SCOPE void SHA1Update(SHA1_CTX* context, unsigned char* data, unsigned int len);
MODULE_SCOPE void SHA1Final(SHA1_CTX* context, unsigned char digest[20]);

/*
 * Only the _Init function is exported.
 */

extern DLLEXPORT int	Sample_Init(Tcl_Interp * interp);

/*
 * end block for C++
 */

#ifdef __cplusplus
}
#endif

#endif /* _SAMPLE */

/*
 * tclsample.c --
 *
 *	This file implements a Tcl interface to the secure hashing
 *	algorithm functions in sha1.c
 *
 * Copyright (c) 1999 Scriptics Corporation.
 * Copyright (c) 2003 ActiveState Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 */

/*
 * Modified from tclmd5.c by Dave Dykstra, dwd@bell-labs.com, 4/22/97
 */

#include <tcl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sample.h"

#define TCL_READ_CHUNK_SIZE 4096

static unsigned char itoa64f[] =
        "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_,";

static int numcontexts = 0;
static SHA1_CTX *sha1Contexts = NULL;
static int *ctxtotalRead = NULL;

static int Sha1_Cmd(ClientData clientData, Tcl_Interp *interp,
		int onjc, Tcl_Obj *const objv[]);

#define DIGESTSIZE 20

/*
 *----------------------------------------------------------------------
 *
 * Sha1 --
 *
 *	 Implements the new Tcl "sha1" command.
 *
 * Results:
 *	A standard Tcl result
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static int
Sha1_Cmd(
    ClientData clientData,	/* Not used. */
    Tcl_Interp *interp,		/* Current interpreter */
    int objc,			/* Number of arguments */
    Tcl_Obj *const objv[]	/* Argument strings */
    )
{
    /*
     * The default base is hex
     */

    int log2base = 4;
    int a;
    Tcl_Obj *stringObj = NULL;
    Tcl_Channel chan = (Tcl_Channel) NULL;
    Tcl_Channel copychan = (Tcl_Channel) NULL;
    int mode;
    int contextnum = 0;
#define sha1Context (sha1Contexts[contextnum])
    char *bufPtr;
    int maxbytes = 0;
    int doinit = 1;
    int dofinal = 1;
    Tcl_Obj *descriptorObj = NULL;
    int totalRead = 0;
    int i, j, n, mask, bits, offset;

    /*
     * For binary representation + null char
     */

    char buf[129];
    unsigned char digest[DIGESTSIZE];

    static const char *options[] = {
	"-chan", "-copychan", "-final", "-init", "-log2base", "-maxbytes",
	"-string", "-update", NULL
    };
    enum ShaOpts {
	SHAOPT_CHAN, SHAOPT_COPY, SHAOPT_FINAL, SHAOPT_INIT, SHAOPT_LOG,
	SHAOPT_MAXB, SHAOPT_STRING, SHAOPT_UPDATE
    };

    for (a = 1; a < objc; a++) {
	int index;

	if (Tcl_GetIndexFromObj(interp, objv[a], options, "option", 0,
		&index) != TCL_OK) {
	    return TCL_ERROR;
	}
	/*
	 * Everything except -init takes an argument...
	 */
	if ((index != SHAOPT_INIT) && (++a >= objc)) {
	    goto wrongArgs;
	}
	switch ((enum ShaOpts) index) {
	case SHAOPT_INIT:
	    for (contextnum = 1; contextnum < numcontexts; contextnum++) {
		if (ctxtotalRead[contextnum] < 0) {
		    break;
		}
	    }
	    if (contextnum == numcontexts) {
		/*
		 * Allocate a new context.
		 */

		numcontexts++;
		sha1Contexts = (SHA1_CTX *) realloc((void *) sha1Contexts,
			numcontexts * sizeof(SHA1_CTX));
		ctxtotalRead = realloc((void *) ctxtotalRead,
			numcontexts * sizeof(int));
	    }
	    ctxtotalRead[contextnum] = 0;
	    SHA1Init(&sha1Context);
	    sprintf(buf, "sha1%d", contextnum);
	    Tcl_AppendResult(interp, buf, (char *)NULL);
	    return TCL_OK;
	case SHAOPT_CHAN:
	    chan = Tcl_GetChannel(interp, Tcl_GetString(objv[a]), &mode);
	    if (chan == (Tcl_Channel) NULL) {
		return TCL_ERROR;
	    }
	    if ((mode & TCL_READABLE) == 0) {
		Tcl_AppendResult(interp, "chan \"", Tcl_GetString(objv[a]),
			"\" wasn't opened for reading", (char *) NULL);
		return TCL_ERROR;
	    }
	    continue;
	case SHAOPT_COPY:
	    copychan = Tcl_GetChannel(interp, Tcl_GetString(objv[a]), &mode);
	    if (copychan == (Tcl_Channel) NULL) {
		return TCL_ERROR;
	    }
	    if ((mode & TCL_WRITABLE) == 0) {
		Tcl_AppendResult(interp, "copychan \"", Tcl_GetString(objv[a]),
			"\" wasn't opened for writing", (char *) NULL);
		return TCL_ERROR;
	    }
	    continue;
	case SHAOPT_FINAL:
	    descriptorObj = objv[a];
	    doinit = 0;
	    continue;
	case SHAOPT_LOG:
	    if (Tcl_GetIntFromObj(interp, objv[a], &log2base) != TCL_OK) {
		return TCL_ERROR;
	    } else if ((log2base < 1) || (log2base > 6)) {
		Tcl_AppendResult(interp, "parameter to -log2base \"",
			Tcl_GetString(objv[a]),
			"\" must be integer in range 1...6", (char *) NULL);
		return TCL_ERROR;
	    }
	    continue;
	case SHAOPT_MAXB:
	    if (Tcl_GetIntFromObj(interp, objv[a], &maxbytes) != TCL_OK) {
		return TCL_ERROR;
	    }
	    continue;
	case SHAOPT_STRING:
	    stringObj = objv[a];
	    continue;
	case SHAOPT_UPDATE:
	    descriptorObj = objv[a];
	    doinit = 0;
	    dofinal = 0;
	    continue;
	}
    }

    if (descriptorObj != NULL) {
	if ((sscanf(Tcl_GetString(descriptorObj), "sha1%d",
		&contextnum) != 1) || (contextnum >= numcontexts) ||
		(ctxtotalRead[contextnum] < 0)) {
	    Tcl_AppendResult(interp, "invalid sha1 descriptor \"",
		    Tcl_GetString(descriptorObj), "\"", (char *) NULL);
	    return TCL_ERROR;
	}
    }

    if (doinit) {
	SHA1Init(&sha1Context);
    }

    if (stringObj != NULL) {
	char *string;
	if (chan != (Tcl_Channel) NULL) {
	    goto wrongArgs;
	}
	string = Tcl_GetStringFromObj(stringObj, &totalRead);
	SHA1Update(&sha1Context, (unsigned char *) string, totalRead);
    } else if (chan != (Tcl_Channel) NULL) {
	bufPtr = ckalloc((unsigned) TCL_READ_CHUNK_SIZE);
	totalRead = 0;
	while ((n = Tcl_Read(chan, bufPtr,
		maxbytes == 0
		? TCL_READ_CHUNK_SIZE
		: (TCL_READ_CHUNK_SIZE < maxbytes
		? TCL_READ_CHUNK_SIZE
		: maxbytes))) != 0) {
	    if (n < 0) {
		ckfree(bufPtr);
		Tcl_AppendResult(interp, Tcl_GetString(objv[0]), ": ",
			Tcl_GetChannelName(chan), Tcl_PosixError(interp),
			(char *) NULL);
		return TCL_ERROR;
	    }

	    totalRead += n;

	    SHA1Update(&sha1Context, (unsigned char *) bufPtr, (unsigned int) n);

	    if (copychan != (Tcl_Channel) NULL) {
		n = Tcl_Write(copychan, bufPtr, n);
		if (n < 0) {
		    ckfree(bufPtr);
		    Tcl_AppendResult(interp, Tcl_GetString(objv[0]), ": ",
			    Tcl_GetChannelName(copychan),
			     Tcl_PosixError(interp), (char *) NULL);
		    return TCL_ERROR;
		}
	    }

	    if ((maxbytes > 0) && ((maxbytes -= n) <= 0)) {
		break;
	    }
	}
	ckfree(bufPtr);
    } else if (descriptorObj == NULL) {
	goto wrongArgs;
    }

    if (!dofinal) {
	ctxtotalRead[contextnum] += totalRead;
	Tcl_SetObjResult(interp, Tcl_NewIntObj(totalRead));
	return TCL_OK;
    }

    if (stringObj == NULL) {
	totalRead += ctxtotalRead[contextnum];
	Tcl_SetObjResult(interp, Tcl_NewIntObj(totalRead));
    }

    SHA1Final(&sha1Context, digest);

    /*
     * Take the 20 byte array and print it in the requested base
     * e.g. log2base=1 => binary,  log2base=4 => hex
     */

    n = log2base;
    i = j = bits = 0;

    /*
     * if 160 bits doesn't divide exactly by n then the first character of
     *  the output represents the residual bits.  e.g for n=6 (base 64) the
     *  first character can only take the values 0..f
     */

    offset = (DIGESTSIZE * 8) % n;
    if (offset > 0) {
	offset = n - offset;
    }
    mask = (2 << (n-1)) - 1;
    while (1) {
        bits <<= n;
        if (offset <= n) {
    	    if (i == DIGESTSIZE) {
		break;
	    }
    	    bits += (digest[i++] << (n - offset));
    	    offset += 8;
        }
        offset -= n;
        buf[j++] = itoa64f[(bits>>8)&mask];
    }
    buf[j++] = itoa64f[(bits>>8)&mask];
    buf[j++] = '\0';
    Tcl_AppendResult (interp, buf, (char *)NULL);
    if (contextnum > 0) {
	ctxtotalRead[contextnum] = -1;
    }
    return TCL_OK;

wrongArgs:
    Tcl_AppendResult (interp, "wrong # args: should be either:\n",
	    "  ",
	    Tcl_GetString(objv[0]),
	    " ?-log2base log2base? -string string\n",
	    " or\n",
	    "  ",
	    Tcl_GetString(objv[0]),
	    " ?-log2base log2base? ?-copychan chanID? -chan chanID\n",
	    " or\n",
	    "  ",
	    Tcl_GetString(objv[0]),
	    " -init (returns descriptor)\n",
	    "  ",
	    Tcl_GetString(objv[0]),
	    " -update descriptor ?-maxbytes n? ?-copychan chanID? -chan chanID\n",
	    "    (any number of -update calls, returns number of bytes read)\n",
	    "  ",
	    Tcl_GetString(objv[0]),
	    " ?-log2base log2base? -final descriptor\n",
	    " The default log2base is 4 (hex)",
	    (char *) NULL);
    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * Sample_Init --
 *
 *	Initialize the new package.  The string "Sample" in the
 *	function name must match the PACKAGE declaration at the top of
 *	configure.ac.
 *
 * Results:
 *	A standard Tcl result
 *
 * Side effects:
 *	The Sample package is created.
 *	One new command "sha1" is added to the Tcl interpreter.
 *
 *----------------------------------------------------------------------
 */

int
Sample_Init(Tcl_Interp *interp)
{
    /*
     * This may work with 8.0, but we are using strictly stubs here,
     * which requires 8.1.
     */
    if (Tcl_InitStubs(interp, "8.1", 0) == NULL) {
	return TCL_ERROR;
    }
    if (Tcl_PkgProvide(interp, PACKAGE_NAME, PACKAGE_VERSION) != TCL_OK) {
	return TCL_ERROR;
    }
    Tcl_CreateObjCommand(interp, "sha1", (Tcl_ObjCmdProc *) Sha1_Cmd,
	    (ClientData)NULL, (Tcl_CmdDeleteProc *)NULL);

    numcontexts = 1;
    sha1Contexts = (SHA1_CTX *) malloc(sizeof(SHA1_CTX));
    ctxtotalRead = (int *) malloc(sizeof(int));
    ctxtotalRead[0] = 0;

    return TCL_OK;
}

# Commands covered:  sha1
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands.  Sourcing this file into Tcl runs the tests and
# generates output for errors.  No output means no errors were found.
#
# Copyright (c) 2000 by Scriptics Corporation.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

if {[lsearch [namespace children] ::tcltest] == -1} {
    package require tcltest
    namespace import ::tcltest::*
}

package require sample

test sha-1.1 {Use of -string operand} {
    set result [sha1 -string foo]
} {0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33}

test sha-1.2 {Use of -init operand} {
    set result [catch {sha1 -init}]
} {0}


# cleanup
::tcltest::cleanupTests
return

# Commands covered:  sha1
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands.  Sourcing this file into Tcl runs the tests and
# generates output for errors.  No output means no errors were found.
#
# Copyright (c) 2000 by Scriptics Corporation.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

if {[lsearch [namespace children] ::tcltest] == -1} {
    package require tcltest
    namespace import ::tcltest::*
}

package require sample

test sha-1.1 {incorrect command usage} {
    list [catch {sha1} errMsg] $errMsg
} {1 {wrong # args: should be either:
  sha1 ?-log2base log2base? -string string
 or
  sha1 ?-log2base log2base? ?-copychan chanID? -chan chanID
 or
  sha1 -init (returns descriptor)
  sha1 -update descriptor ?-maxbytes n? ?-copychan chanID? -chan chanID
    (any number of -update calls, returns number of bytes read)
  sha1 ?-log2base log2base? -final descriptor
 The default log2base is 4 (hex)}}

test sha-1.2 {incorrect usage of -log2base option} {
    list [catch {sha1 -log2base 0 -string foo} errMsg] $errMsg
} {1 {parameter to -log2base "0" must be integer in range 1...6}}

# cleanup
::tcltest::cleanupTests
return