diff options
| -rw-r--r-- | lib/crypto/c_src/crypto.c | 17 | ||||
| -rw-r--r-- | lib/crypto/src/crypto.erl | 16 |
2 files changed, 25 insertions, 8 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c index 4966701e41..b39653bcb8 100644 --- a/lib/crypto/c_src/crypto.c +++ b/lib/crypto/c_src/crypto.c @@ -403,7 +403,7 @@ static ErlNifFunc nif_funcs[] = { {"rsa_private_crypt", 4, rsa_private_crypt}, {"dh_generate_parameters_nif", 2, dh_generate_parameters_nif}, {"dh_check", 1, dh_check}, - {"dh_generate_key_nif", 3, dh_generate_key_nif}, + {"dh_generate_key_nif", 4, dh_generate_key_nif}, {"dh_compute_key_nif", 3, dh_compute_key_nif}, {"srp_value_B_nif", 5, srp_value_B_nif}, {"srp_user_secret_nif", 7, srp_user_secret_nif}, @@ -3062,12 +3062,13 @@ static ERL_NIF_TERM dh_check(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[] } static ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) -{/* (PrivKey, DHParams=[P,G], Mpint) */ +{/* (PrivKey|undefined, DHParams=[P,G], Mpint, Len|0) */ DH* dh_params; int pub_len, prv_len; unsigned char *pub_ptr, *prv_ptr; ERL_NIF_TERM ret, ret_pub, ret_prv, head, tail; int mpint; /* 0 or 4 */ + unsigned long len = 0; CHECK_OSE_CRYPTO(); @@ -3080,11 +3081,21 @@ static ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_ || !enif_get_list_cell(env, tail, &head, &tail) || !get_bn_from_bin(env, head, &dh_params->g) || !enif_is_empty_list(env, tail) - || !enif_get_int(env, argv[2], &mpint) || (mpint & ~4)) { + || !enif_get_int(env, argv[2], &mpint) || (mpint & ~4) + || !enif_get_ulong(env, argv[3], &len) ) { DH_free(dh_params); return enif_make_badarg(env); } + if (len) { + if (len < BN_num_bits(dh_params->p)) + dh_params->length = len; + else { + DH_free(dh_params); + return enif_make_badarg(env); + } + } + if (DH_generate_key(dh_params)) { pub_len = BN_num_bytes(dh_params->pub_key); prv_len = BN_num_bytes(dh_params->priv_key); diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl index 38e71591f3..1150fd60e0 100644 --- a/lib/crypto/src/crypto.erl +++ b/lib/crypto/src/crypto.erl @@ -574,9 +574,15 @@ exor(Bin1, Bin2) -> generate_key(Type, Params) -> generate_key(Type, Params, undefined). -generate_key(dh, DHParameters, PrivateKey) -> +generate_key(dh, DHParameters0, PrivateKey) -> + {DHParameters, Len} = + case DHParameters0 of + [P,G,L] -> {[P,G], L}; + [P,G] -> {[P,G], 0} + end, dh_generate_key_nif(ensure_int_as_bin(PrivateKey), - map_ensure_int_as_bin(DHParameters), 0); + map_ensure_int_as_bin(DHParameters), + 0, Len); generate_key(srp, {host, [Verifier, Generator, Prime, Version]}, PrivArg) when is_binary(Verifier), is_binary(Generator), is_binary(Prime), is_atom(Version) -> @@ -1555,11 +1561,11 @@ dh_check([_Prime,_Gen]) -> ?nif_stub. {binary(),binary()}. dh_generate_key(DHParameters) -> - dh_generate_key_nif(undefined, map_mpint_to_bin(DHParameters), 4). + dh_generate_key_nif(undefined, map_mpint_to_bin(DHParameters), 4, 0). dh_generate_key(PrivateKey, DHParameters) -> - dh_generate_key_nif(mpint_to_bin(PrivateKey), map_mpint_to_bin(DHParameters), 4). + dh_generate_key_nif(mpint_to_bin(PrivateKey), map_mpint_to_bin(DHParameters), 4, 0). -dh_generate_key_nif(_PrivateKey, _DHParameters, _Mpint) -> ?nif_stub. +dh_generate_key_nif(_PrivateKey, _DHParameters, _Mpint, _Length) -> ?nif_stub. %% DHParameters = [P (Prime)= mpint(), G(Generator) = mpint()] %% MyPrivKey, OthersPublicKey = mpint() |