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-rw-r--r--lib/crypto/c_src/crypto.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index 8139b331bf..7853ef3291 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -207,6 +207,9 @@ static ERL_NIF_TERM dh_generate_parameters_nif(ErlNifEnv* env, int argc, const E
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[]);
static ERL_NIF_TERM dh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM srp_value_B_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM srp_client_secret_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM srp_server_secret(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM bf_cfb64_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM bf_cbc_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM bf_ecb_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -321,6 +324,9 @@ static ErlNifFunc nif_funcs[] = {
{"dh_check", 1, dh_check},
{"dh_generate_key_nif", 2, dh_generate_key_nif},
{"dh_compute_key_nif", 3, dh_compute_key_nif},
+ {"srp_value_B_nif", 5, srp_value_B_nif},
+ {"srp_client_secret_nif", 7, srp_client_secret_nif},
+ {"srp_server_secret", 5, srp_server_secret},
{"bf_cfb64_crypt", 4, bf_cfb64_crypt},
{"bf_cbc_crypt", 4, bf_cbc_crypt},
{"bf_ecb_crypt", 3, bf_ecb_crypt},
@@ -1515,6 +1521,17 @@ static int get_bn_from_mpint(ErlNifEnv* env, ERL_NIF_TERM term, BIGNUM** bnp)
return 1;
}
+static int get_bn_from_bin(ErlNifEnv* env, ERL_NIF_TERM term, BIGNUM** bnp)
+{
+ ErlNifBinary bin;
+ if (!enif_inspect_binary(env,term,&bin)) {
+ return 0;
+ }
+ ERL_VALGRIND_ASSERT_MEM_DEFINED(bin.data, bin.size);
+ *bnp = BN_bin2bn(bin.data, bin.size, NULL);
+ return 1;
+}
+
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;
@@ -2352,6 +2369,205 @@ static ERL_NIF_TERM dh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_T
return ret;
}
+static ERL_NIF_TERM srp_value_B_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Multiplier, Verifier, Generator, Exponent, Prime) */
+ BIGNUM *bn_verifier = NULL;
+ BIGNUM *bn_exponent, *bn_generator, *bn_prime, *bn_multiplier, *bn_result;
+ BN_CTX *bn_ctx;
+ unsigned char* ptr;
+ unsigned dlen;
+ ERL_NIF_TERM ret;
+
+ if (!get_bn_from_bin(env, argv[0], &bn_multiplier)
+ || !get_bn_from_bin(env, argv[1], &bn_verifier)
+ || !get_bn_from_bin(env, argv[2], &bn_generator)
+ || !get_bn_from_bin(env, argv[3], &bn_exponent)
+ || !get_bn_from_bin(env, argv[4], &bn_prime)) {
+ if (bn_multiplier) BN_free(bn_multiplier);
+ if (bn_verifier) BN_free(bn_verifier);
+ if (bn_verifier) BN_free(bn_generator);
+ if (bn_verifier) BN_free(bn_exponent);
+ if (bn_verifier) BN_free(bn_prime);
+ return enif_make_badarg(env);
+ }
+
+ bn_result = BN_new();
+ bn_ctx = BN_CTX_new();
+
+ /* B = k*v + g^b % N */
+
+ /* k * v */
+ BN_mod_mul(bn_multiplier, bn_multiplier, bn_verifier, bn_prime, bn_ctx);
+
+ /* g^b % N */
+ BN_mod_exp(bn_result, bn_generator, bn_exponent, bn_prime, bn_ctx);
+
+ /* k*v + g^b % N */
+ BN_mod_add(bn_result, bn_result, bn_multiplier, bn_prime, bn_ctx);
+
+ /* check that B % N != 0, reuse bn_multiplier */
+ BN_nnmod(bn_multiplier, bn_result, bn_prime, bn_ctx);
+ if (BN_is_zero(bn_multiplier)) {
+ ret = atom_error;
+ } else {
+ dlen = BN_num_bytes(bn_result);
+ ptr = enif_make_new_binary(env, dlen, &ret);
+ BN_bn2bin(bn_result, ptr);
+ }
+ BN_free(bn_result);
+ BN_CTX_free(bn_ctx);
+ BN_free(bn_prime);
+ BN_free(bn_generator);
+ BN_free(bn_multiplier);
+ BN_free(bn_exponent);
+ BN_free(bn_verifier);
+ return ret;
+}
+
+static ERL_NIF_TERM srp_client_secret_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (a, u, B, Multiplier, Prime, Exponent, Generator) */
+/*
+ <premaster secret> = (B - (k * g^x)) ^ (a + (u * x)) % N
+*/
+ BIGNUM *bn_exponent = NULL, *bn_a = NULL;
+ BIGNUM *bn_u, *bn_multiplier, *bn_exp2, *bn_base,
+ *bn_prime, *bn_generator, *bn_B, *bn_result;
+ BN_CTX *bn_ctx;
+ unsigned char* ptr;
+ unsigned dlen;
+ ERL_NIF_TERM ret;
+
+ if (!get_bn_from_bin(env, argv[0], &bn_a)
+ || !get_bn_from_bin(env, argv[1], &bn_u)
+ || !get_bn_from_bin(env, argv[2], &bn_B)
+ || !get_bn_from_bin(env, argv[3], &bn_multiplier)
+ || !get_bn_from_bin(env, argv[4], &bn_generator)
+ || !get_bn_from_bin(env, argv[5], &bn_exponent)
+ || !get_bn_from_bin(env, argv[6], &bn_prime))
+ {
+ if (bn_exponent) BN_free(bn_exponent);
+ if (bn_a) BN_free(bn_a);
+ if (bn_u) BN_free(bn_u);
+ if (bn_B) BN_free(bn_B);
+ if (bn_multiplier) BN_free(bn_multiplier);
+ if (bn_generator) BN_free(bn_generator);
+ if (bn_prime) BN_free(bn_prime);
+ return enif_make_badarg(env);
+ }
+
+ bn_ctx = BN_CTX_new();
+ bn_result = BN_new();
+
+ /* check that B % N != 0 */
+ BN_nnmod(bn_result, bn_B, bn_prime, bn_ctx);
+ if (BN_is_zero(bn_result)) {
+ BN_free(bn_exponent);
+ BN_free(bn_a);
+ BN_free(bn_generator);
+ BN_free(bn_prime);
+ BN_free(bn_u);
+ BN_free(bn_B);
+ BN_CTX_free(bn_ctx);
+
+ return atom_error;
+ }
+
+ /* (B - (k * g^x)) */
+ bn_base = BN_new();
+ BN_mod_exp(bn_result, bn_generator, bn_exponent, bn_prime, bn_ctx);
+ BN_mod_mul(bn_result, bn_multiplier, bn_result, bn_prime, bn_ctx);
+ BN_mod_sub(bn_base, bn_B, bn_result, bn_prime, bn_ctx);
+
+ /* a + (u * x) */
+ bn_exp2 = BN_new();
+ BN_mod_mul(bn_result, bn_u, bn_exponent, bn_prime, bn_ctx);
+ BN_mod_add(bn_exp2, bn_a, bn_result, bn_prime, bn_ctx);
+
+ /* (B - (k * g^x)) ^ (a + (u * x)) % N */
+ BN_mod_exp(bn_result, bn_base, bn_exp2, bn_prime, bn_ctx);
+
+ dlen = BN_num_bytes(bn_result);
+ ptr = enif_make_new_binary(env, dlen, &ret);
+ BN_bn2bin(bn_result, ptr);
+ BN_free(bn_result);
+ BN_CTX_free(bn_ctx);
+
+ BN_free(bn_multiplier);
+ BN_free(bn_exp2);
+ BN_free(bn_u);
+ BN_free(bn_exponent);
+ BN_free(bn_a);
+ BN_free(bn_B);
+ BN_free(bn_base);
+ BN_free(bn_generator);
+ BN_free(bn_prime);
+ return ret;
+}
+
+static ERL_NIF_TERM srp_server_secret(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Verifier, b, u, A, Prime) */
+/*
+ <premaster secret> = (A * v^u) ^ b % N
+*/
+ BIGNUM *bn_b = NULL, *bn_verifier = NULL;
+ BIGNUM *bn_prime, *bn_A, *bn_u, *bn_base, *bn_result;
+ BN_CTX *bn_ctx;
+ unsigned char* ptr;
+ unsigned dlen;
+ ERL_NIF_TERM ret;
+
+ if (!get_bn_from_bin(env, argv[0], &bn_verifier)
+ || !get_bn_from_bin(env, argv[1], &bn_b)
+ || !get_bn_from_bin(env, argv[2], &bn_u)
+ || !get_bn_from_bin(env, argv[3], &bn_A)
+ || !get_bn_from_bin(env, argv[4], &bn_prime))
+ {
+ if (bn_verifier) BN_free(bn_verifier);
+ if (bn_b) BN_free(bn_b);
+ if (bn_u) BN_free(bn_u);
+ if (bn_A) BN_free(bn_A);
+ if (bn_prime) BN_free(bn_prime);
+ return enif_make_badarg(env);
+ }
+
+ bn_ctx = BN_CTX_new();
+ bn_result = BN_new();
+
+ /* check that A % N != 0 */
+ BN_nnmod(bn_result, bn_A, bn_prime, bn_ctx);
+ if (BN_is_zero(bn_result)) {
+ BN_free(bn_b);
+ BN_free(bn_verifier);
+ BN_free(bn_prime);
+ BN_free(bn_A);
+ BN_CTX_free(bn_ctx);
+
+ return atom_error;
+ }
+
+ /* (A * v^u) */
+ bn_base = BN_new();
+ BN_mod_exp(bn_base, bn_verifier, bn_u, bn_prime, bn_ctx);
+ BN_mod_mul(bn_base, bn_A, bn_base, bn_prime, bn_ctx);
+
+ /* (A * v^u) ^ b % N */
+ BN_mod_exp(bn_result, bn_base, bn_b, bn_prime, bn_ctx);
+
+ dlen = BN_num_bytes(bn_result);
+ ptr = enif_make_new_binary(env, dlen, &ret);
+ BN_bn2bin(bn_result, ptr);
+ BN_free(bn_result);
+ BN_CTX_free(bn_ctx);
+
+ BN_free(bn_u);
+ BN_free(bn_base);
+ BN_free(bn_verifier);
+ BN_free(bn_prime);
+ BN_free(bn_A);
+ BN_free(bn_b);
+ return ret;
+}
+
static ERL_NIF_TERM bf_cfb64_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Key, Ivec, Data, IsEncrypt) */
ErlNifBinary key_bin, ivec_bin, data_bin;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 06:52:38 +0000