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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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* The library is free for all purposes without any express
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* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org
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Generate a random prime, Tom St Denis
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static int rand_prime_helper(unsigned char *dst, int len, void *dat)
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return (int)prng_descriptor[((struct rng_data *)dat)->wprng].read(dst, len, ((struct rng_data *)dat)->prng);
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int rand_prime(mp_int *N, long len, prng_state *prng, int wprng)
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LTC_ARGCHK(N != NULL);
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/* allow sizes between 2 and 256 bytes for a prime size */
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if (len < 16 || len > 4096) {
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return CRYPT_INVALID_PRIME_SIZE;
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/* valid PRNG? Better be! */
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if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
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/* setup our callback data, then world domination! */
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type |= LTM_PRIME_2MSB_ON;
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/* New prime generation makes the code even more cryptoish-insane. Do you know what this means!!!
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-- Gir: Yeah, oh wait, er, no.
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return mpi_to_ltc_error(mp_prime_random_ex(N, mp_prime_rabin_miller_trials(len), len, type, rand_prime_helper, &rng));
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/* $Source: /cvs/libtom/libtomcrypt/src/misc/mpi/rand_prime.c,v $ */
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/* $Revision: 1.3 $ */
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/* $Date: 2005/05/05 14:35:59 $ */