diff options
Diffstat (limited to 'lib/crypto/c_src')
| -rw-r--r-- | lib/crypto/c_src/crypto.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c index b2f31870b9..0e17279e62 100644 --- a/lib/crypto/c_src/crypto.c +++ b/lib/crypto/c_src/crypto.c @@ -429,6 +429,7 @@ static ERL_NIF_TERM aes_ige_crypt_nif(ErlNifEnv* env, int argc, const ERL_NIF_TE static ERL_NIF_TERM aes_ctr_stream_init(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM strong_rand_bytes_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); +static ERL_NIF_TERM strong_rand_uniform_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM rand_uniform_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM mod_exp_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM dss_verify_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); @@ -501,6 +502,7 @@ static ErlNifFunc nif_funcs[] = { {"aes_ctr_stream_encrypt", 2, aes_ctr_stream_encrypt}, {"aes_ctr_stream_decrypt", 2, aes_ctr_stream_encrypt}, {"strong_rand_bytes_nif", 1, strong_rand_bytes_nif}, + {"strong_rand_uniform_nif", 2, strong_rand_uniform_nif}, {"rand_uniform_nif", 2, rand_uniform_nif}, {"mod_exp_nif", 4, mod_exp_nif}, {"dss_verify_nif", 4, dss_verify_nif}, @@ -2331,6 +2333,38 @@ static ERL_NIF_TERM bin_from_bn(ErlNifEnv* env, const BIGNUM *bn) return term; } +static ERL_NIF_TERM strong_rand_uniform_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) +{/* (Lo,Hi) */ + BIGNUM *bn_from = NULL, *bn_to, *bn_rand; + unsigned char* data; + unsigned dlen; + ERL_NIF_TERM ret; + + if (!get_bn_from_mpint(env, argv[0], &bn_from) + || !get_bn_from_mpint(env, argv[1], &bn_rand)) { + if (bn_from) BN_free(bn_from); + return enif_make_badarg(env); + } + + bn_to = BN_new(); + BN_sub(bn_to, bn_rand, bn_from); + if (BN_rand_range(bn_rand, bn_to) != 1) { + ret = atom_false; + } + else { + BN_add(bn_rand, bn_rand, bn_from); + dlen = BN_num_bytes(bn_rand); + data = enif_make_new_binary(env, dlen+4, &ret); + put_int32(data, dlen); + BN_bn2bin(bn_rand, data+4); + ERL_VALGRIND_MAKE_MEM_DEFINED(data+4, dlen); + } + BN_free(bn_rand); + BN_free(bn_from); + BN_free(bn_to); + return ret; +} + static ERL_NIF_TERM rand_uniform_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {/* (Lo,Hi) */ BIGNUM *bn_from = NULL, *bn_to, *bn_rand; |