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#include <stdint.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <tcl.h>
#include "randombytes.h"
#include "tweetnacl.h"
#include "blake2.h"
#define NANO_SECRET_KEY_LENGTH (crypto_sign_SECRETKEYBYTES - crypto_sign_PUBLICKEYBYTES)
#define NANO_PUBLIC_KEY_LENGTH (crypto_sign_PUBLICKEYBYTES)
#define TclNano_AttemptAlloc(x) ((void *) Tcl_AttemptAlloc(x))
#define TclNano_Free(x) Tcl_Free((char *) x)
#if defined(HAVE_GETRANDOM)
# ifdef HAVE_SYS_RANDOM_H
# include <sys/random.h>
# endif
void randombytes(uint8_t *buffer, uint64_t length) {
ssize_t gr_ret;
while (length > 0) {
gr_ret = getrandom(buffer, length, 0);
if (gr_ret <= 0) {
continue;
}
buffer += gr_ret;
length -= gr_ret;
}
return;
}
#elif defined(HAVE_GETENTROPY)
void randombytes(uint8_t *buffer, uint64_t length) {
int ge_ret;
int current_length;
while (length > 0) {
current_length = length;
if (current_length > 256) {
current_length = 256;
}
ge_ret = getentropy(buffer, current_length);
if (ge_ret != 0) {
continue;
}
buffer += current_length;
length -= current_length;
}
return;
}
#else
# ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
# endif
# ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
# endif
# ifdef HAVE_FCNTL_H
# include <fcntl.h>
# endif
void randombytes(uint8_t *buffer, uint64_t length) {
ssize_t read_ret;
int fd = -1;
while (fd < 0) {
fd = open("/dev/urandom", O_RDONLY);
}
while (length > 0) {
read_ret = read(fd, buffer, length);
if (read_ret <= 0) {
continue;
}
buffer += read_ret;
length -= read_ret;
}
close(fd);
return;
}
#endif
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;
secret_key_only = Tcl_GetByteArrayFromObj(secret_key_only_obj, &secret_key_only_length);
if (secret_key_only_length != NANO_SECRET_KEY_LENGTH) {
return(NULL);
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