gcry_error_t gcry_prime_generate (gcry_mpi_t *prime,unsigned int prime_bits, unsigned int factor_bits, gcry_mpi_t **factors, gcry_prime_check_func_t cb_func, void *cb_arg, gcry_random_level_t random_level, unsigned int flags) ¶Generate a new prime number of prime_bits bits and store it in
prime. If factor_bits is non-zero, one of the prime factors
of (prime - 1) / 2 must be factor_bits bits long. If
factors is non-zero, allocate a new, NULL-terminated array
holding the prime factors and store it in factors. flags
might be used to influence the prime number generation process.
gcry_error_t gcry_prime_group_generator (gcry_mpi_t *r_g, gcry_mpi_t prime, gcry_mpi_t *factors, gcry_mpi_t start_g) ¶Find a generator for prime where the factorization of
(prime - 1) is in the NULL terminated array factors.
Return the generator as a newly allocated MPI in r_g. If
start_g is not NULL, use this as the start for the search.
void gcry_prime_release_factors (gcry_mpi_t *factors) ¶Convenience function to release the factors array.