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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*/
#include <tomcrypt_test.h>
#ifdef LTC_PRNG_ENABLE_LTC_RNG
static unsigned long my_test_rng_read;
static unsigned long my_test_rng(unsigned char *buf, unsigned long len,
void (*callback)(void))
{
unsigned long n;
LTC_UNUSED_PARAM(callback);
for (n = 0; n < len; ++n) {
buf[n] = 4;
}
my_test_rng_read += n;
return n;
}
#endif
int prng_test(void)
{
int err = CRYPT_NOP;
int x;
unsigned char buf[4096] = { 0 };
unsigned long n, one;
prng_state nprng;
#ifdef LTC_PRNG_ENABLE_LTC_RNG
unsigned long before;
unsigned long (*previous)(unsigned char *, unsigned long , void (*)(void)) = ltc_rng;
ltc_rng = my_test_rng;
before = my_test_rng_read;
if ((err = rng_make_prng(128, find_prng("yarrow"), &yarrow_prng, NULL)) != CRYPT_OK) {
fprintf(stderr, "rng_make_prng with 'my_test_rng' failed: %s\n", error_to_string(err));
exit(EXIT_FAILURE);
}
if (before == my_test_rng_read) {
fprintf(stderr, "somehow there was no read from the ltc_rng! %lu == %lu\n", before, my_test_rng_read);
exit(EXIT_FAILURE);
}
ltc_rng = previous;
#endif
/* test prngs (test, import/export) */
for (x = 0; prng_descriptor[x].name != NULL; x++) {
if(strstr(prng_descriptor[x].name, "no_prng") == prng_descriptor[x].name) continue;
err = CRYPT_OK;
DOX(prng_descriptor[x].test(), prng_descriptor[x].name);
DOX(prng_descriptor[x].start(&nprng), prng_descriptor[x].name);
DOX(prng_descriptor[x].add_entropy((unsigned char *)"helloworld12", 12, &nprng), prng_descriptor[x].name);
DOX(prng_descriptor[x].ready(&nprng), prng_descriptor[x].name);
n = sizeof(buf);
if (strcmp(prng_descriptor[x].name, "sprng")) {
one = 1;
if (prng_descriptor[x].pexport(buf, &one, &nprng) != CRYPT_BUFFER_OVERFLOW) {
fprintf(stderr, "Error testing pexport with a short buffer (%s)\n", prng_descriptor[x].name);
return CRYPT_ERROR;
}
}
DOX(prng_descriptor[x].pexport(buf, &n, &nprng), prng_descriptor[x].name);
prng_descriptor[x].done(&nprng);
DOX(prng_descriptor[x].pimport(buf, n, &nprng), prng_descriptor[x].name);
DOX(prng_descriptor[x].pimport(buf, 4096, &nprng), prng_descriptor[x].name); /* try to import larger data */
DOX(prng_descriptor[x].ready(&nprng), prng_descriptor[x].name);
if (prng_descriptor[x].read(buf, 100, &nprng) != 100) {
fprintf(stderr, "Error reading from imported PRNG (%s)!\n", prng_descriptor[x].name);
return CRYPT_ERROR;
}
prng_descriptor[x].done(&nprng);
}
return err;
}
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
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