static int wrap_nettle_pk_verify_pub_params(gnutls_pk_algorithm_t algo, const gnutls_pk_params_st * params) { int ret; switch (algo) { case GNUTLS_PK_RSA: case GNUTLS_PK_DSA: return 0; case GNUTLS_PK_EC: { /* just verify that x and y lie on the curve */ struct ecc_point r, pub; const struct ecc_curve *curve; if (params->params_nr != ECC_PUBLIC_PARAMS) return gnutls_assert_val (GNUTLS_E_INVALID_REQUEST); curve = get_supported_curve(params->flags); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ret = _ecc_params_to_pubkey(params, &pub, curve); if (ret < 0) return gnutls_assert_val(ret); ecc_point_init(&r, curve); /* verify that x,y lie on the curve */ ret = ecc_point_set(&r, TOMPZ(params->params[ECC_X]), TOMPZ(params->params[ECC_Y])); if (ret == 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto ecc_cleanup; } ecc_point_clear(&r); ret = 0; ecc_cleanup: ecc_point_clear(&pub); } break; default: ret = gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); } return ret; }
static int wrap_nettle_pk_verify_params(gnutls_pk_algorithm_t algo, const gnutls_pk_params_st * params) { int ret; switch (algo) { case GNUTLS_PK_RSA: { bigint_t t1 = NULL, t2 = NULL; if (params->params_nr != RSA_PRIVATE_PARAMS) return gnutls_assert_val (GNUTLS_E_INVALID_REQUEST); t1 = _gnutls_mpi_new(256); if (t1 == NULL) return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR); _gnutls_mpi_mulm(t1, params->params[RSA_PRIME1], params->params[RSA_PRIME2], params->params[RSA_MODULUS]); if (_gnutls_mpi_cmp_ui(t1, 0) != 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto rsa_cleanup; } mpz_invert(TOMPZ(t1), TOMPZ(params->params[RSA_PRIME2]), TOMPZ(params->params[RSA_PRIME1])); if (_gnutls_mpi_cmp(t1, params->params[RSA_COEF]) != 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto rsa_cleanup; } /* [RSA_PRIME1] = d % p-1, [RSA_PRIME2] = d % q-1 */ _gnutls_mpi_sub_ui(t1, params->params[RSA_PRIME1], 1); t2 = _gnutls_mpi_mod(params->params[RSA_PRIV], t1); if (t2 == NULL) { ret = gnutls_assert_val (GNUTLS_E_MEMORY_ERROR); goto rsa_cleanup; } if (_gnutls_mpi_cmp(params->params[RSA_E1], t2) != 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto rsa_cleanup; } _gnutls_mpi_sub_ui(t1, params->params[RSA_PRIME2], 1); _gnutls_mpi_release(&t2); t2 = _gnutls_mpi_mod(params->params[RSA_PRIV], t1); if (t2 == NULL) { ret = gnutls_assert_val (GNUTLS_E_MEMORY_ERROR); goto rsa_cleanup; } if (_gnutls_mpi_cmp(params->params[RSA_E2], t2) != 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto rsa_cleanup; } ret = 0; rsa_cleanup: _gnutls_mpi_release(&t1); _gnutls_mpi_release(&t2); } break; case GNUTLS_PK_DSA: { bigint_t t1 = NULL; if (params->params_nr != DSA_PRIVATE_PARAMS) return gnutls_assert_val (GNUTLS_E_INVALID_REQUEST); t1 = _gnutls_mpi_new(256); if (t1 == NULL) return gnutls_assert_val (GNUTLS_E_MEMORY_ERROR); _gnutls_mpi_powm(t1, params->params[DSA_G], params->params[DSA_X], params->params[DSA_P]); if (_gnutls_mpi_cmp(t1, params->params[DSA_Y]) != 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto dsa_cleanup; } ret = 0; dsa_cleanup: _gnutls_mpi_release(&t1); } break; case GNUTLS_PK_EC: { struct ecc_point r, pub; struct ecc_scalar priv; mpz_t x1, y1, x2, y2; const struct ecc_curve *curve; if (params->params_nr != ECC_PRIVATE_PARAMS) return gnutls_assert_val (GNUTLS_E_INVALID_REQUEST); curve = get_supported_curve(params->flags); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ret = _ecc_params_to_pubkey(params, &pub, curve); if (ret < 0) return gnutls_assert_val(ret); ret = _ecc_params_to_privkey(params, &priv, curve); if (ret < 0) { ecc_point_clear(&pub); return gnutls_assert_val(ret); } ecc_point_init(&r, curve); /* verify that x,y lie on the curve */ ret = ecc_point_set(&r, TOMPZ(params->params[ECC_X]), TOMPZ(params->params[ECC_Y])); if (ret == 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto ecc_cleanup; } ecc_point_clear(&r); ecc_point_init(&r, curve); ecc_point_mul_g(&r, &priv); mpz_init(x1); mpz_init(y1); ecc_point_get(&r, x1, y1); ecc_point_clear(&r); mpz_init(x2); mpz_init(y2); ecc_point_get(&pub, x2, y2); /* verify that k*(Gx,Gy)=(x,y) */ if (mpz_cmp(x1, x2) != 0 || mpz_cmp(y1, y2) != 0) { ret = gnutls_assert_val (GNUTLS_E_ILLEGAL_PARAMETER); goto ecc_cleanup; } ret = 0; ecc_cleanup: ecc_scalar_clear(&priv); ecc_point_clear(&pub); } break; default: ret = gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); } return ret; }
static int wrap_nettle_pk_generate_params(gnutls_pk_algorithm_t algo, unsigned int level /*bits */ , gnutls_pk_params_st * params) { int ret; unsigned int i, q_bits; memset(params, 0, sizeof(*params)); switch (algo) { case GNUTLS_PK_DSA: { struct dsa_public_key pub; struct dsa_private_key priv; dsa_public_key_init(&pub); dsa_private_key_init(&priv); /* the best would be to use _gnutls_pk_bits_to_subgroup_bits() * but we do NIST DSA here */ if (level <= 1024) q_bits = 160; else q_bits = 256; ret = dsa_generate_keypair(&pub, &priv, NULL, rnd_func, NULL, NULL, level, q_bits); if (ret != 1) { gnutls_assert(); ret = GNUTLS_E_INTERNAL_ERROR; goto dsa_fail; } params->params_nr = 0; for (i = 0; i < DSA_PRIVATE_PARAMS; i++) { params->params[i] = _gnutls_mpi_alloc_like(&pub.p); if (params->params[i] == NULL) { ret = GNUTLS_E_MEMORY_ERROR; goto dsa_fail; } params->params_nr++; } ret = 0; _gnutls_mpi_set(params->params[0], pub.p); _gnutls_mpi_set(params->params[1], pub.q); _gnutls_mpi_set(params->params[2], pub.g); _gnutls_mpi_set(params->params[3], pub.y); _gnutls_mpi_set(params->params[4], priv.x); dsa_fail: dsa_private_key_clear(&priv); dsa_public_key_clear(&pub); if (ret < 0) goto fail; break; } case GNUTLS_PK_RSA: { struct rsa_public_key pub; struct rsa_private_key priv; rsa_public_key_init(&pub); rsa_private_key_init(&priv); _gnutls_mpi_set_ui(&pub.e, 65537); ret = rsa_generate_keypair(&pub, &priv, NULL, rnd_func, NULL, NULL, level, 0); if (ret != 1) { gnutls_assert(); ret = GNUTLS_E_INTERNAL_ERROR; goto rsa_fail; } params->params_nr = 0; for (i = 0; i < RSA_PRIVATE_PARAMS; i++) { params->params[i] = _gnutls_mpi_alloc_like(&pub.n); if (params->params[i] == NULL) { ret = GNUTLS_E_MEMORY_ERROR; goto rsa_fail; } params->params_nr++; } ret = 0; _gnutls_mpi_set(params->params[0], pub.n); _gnutls_mpi_set(params->params[1], pub.e); _gnutls_mpi_set(params->params[2], priv.d); _gnutls_mpi_set(params->params[3], priv.p); _gnutls_mpi_set(params->params[4], priv.q); _gnutls_mpi_set(params->params[5], priv.c); _gnutls_mpi_set(params->params[6], priv.a); _gnutls_mpi_set(params->params[7], priv.b); rsa_fail: rsa_private_key_clear(&priv); rsa_public_key_clear(&pub); if (ret < 0) goto fail; break; } case GNUTLS_PK_EC: { struct ecc_scalar key; struct ecc_point pub; const struct ecc_curve *curve; curve = get_supported_curve(level); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ecc_scalar_init(&key, curve); ecc_point_init(&pub, curve); ecdsa_generate_keypair(&pub, &key, NULL, rnd_func); params->params[ECC_X] = _gnutls_mpi_new(0); params->params[ECC_Y] = _gnutls_mpi_new(0); params->params[ECC_K] = _gnutls_mpi_new(0); if (params->params[ECC_X] == NULL || params->params[ECC_Y] == NULL || params->params[ECC_K] == NULL) { _gnutls_mpi_release(¶ms-> params[ECC_X]); _gnutls_mpi_release(¶ms-> params[ECC_Y]); _gnutls_mpi_release(¶ms-> params[ECC_K]); goto ecc_cleanup; } params->flags = level; params->params_nr = ECC_PRIVATE_PARAMS; ecc_point_get(&pub, TOMPZ(params->params[ECC_X]), TOMPZ(params->params[ECC_Y])); ecc_scalar_get(&key, TOMPZ(params->params[ECC_K])); ecc_cleanup: ecc_point_clear(&pub); ecc_scalar_clear(&key); break; } default: gnutls_assert(); return GNUTLS_E_INVALID_REQUEST; } return 0; fail: for (i = 0; i < params->params_nr; i++) { _gnutls_mpi_release(¶ms->params[i]); } params->params_nr = 0; return ret; }
static int _wrap_nettle_pk_verify(gnutls_pk_algorithm_t algo, const gnutls_datum_t * vdata, const gnutls_datum_t * signature, const gnutls_pk_params_st * pk_params) { int ret; unsigned int hash_len; bigint_t tmp[2] = { NULL, NULL }; switch (algo) { case GNUTLS_PK_EC: /* ECDSA */ { struct ecc_point pub; struct dsa_signature sig; int curve_id = pk_params->flags; const struct ecc_curve *curve; curve = get_supported_curve(curve_id); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ret = _gnutls_decode_ber_rs(signature, &tmp[0], &tmp[1]); if (ret < 0) return gnutls_assert_val(ret); ret = _ecc_params_to_pubkey(pk_params, &pub, curve); if (ret < 0) { gnutls_assert(); goto cleanup; } memcpy(&sig.r, tmp[0], sizeof(sig.r)); memcpy(&sig.s, tmp[1], sizeof(sig.s)); _gnutls_dsa_q_to_hash(algo, pk_params, &hash_len); if (hash_len > vdata->size) hash_len = vdata->size; ret = ecdsa_verify(&pub, hash_len, vdata->data, &sig); if (ret == 0) { gnutls_assert(); ret = GNUTLS_E_PK_SIG_VERIFY_FAILED; } else ret = 0; ecc_point_clear(&pub); break; } case GNUTLS_PK_DSA: { struct dsa_public_key pub; struct dsa_signature sig; ret = _gnutls_decode_ber_rs(signature, &tmp[0], &tmp[1]); if (ret < 0) { gnutls_assert(); goto cleanup; } memset(&pub, 0, sizeof(pub)); _dsa_params_to_pubkey(pk_params, &pub); memcpy(&sig.r, tmp[0], sizeof(sig.r)); memcpy(&sig.s, tmp[1], sizeof(sig.s)); _gnutls_dsa_q_to_hash(algo, pk_params, &hash_len); if (hash_len > vdata->size) hash_len = vdata->size; ret = _dsa_verify(&pub, hash_len, vdata->data, &sig); if (ret == 0) { gnutls_assert(); ret = GNUTLS_E_PK_SIG_VERIFY_FAILED; } else ret = 0; break; } case GNUTLS_PK_RSA: { struct rsa_public_key pub; _rsa_params_to_pubkey(pk_params, &pub); if (signature->size != pub.size) return gnutls_assert_val (GNUTLS_E_PK_SIG_VERIFY_FAILED); ret = _gnutls_mpi_scan_nz(&tmp[0], signature->data, signature->size); if (ret < 0) { gnutls_assert(); goto cleanup; } ret = rsa_pkcs1_verify(&pub, vdata->size, vdata->data, TOMPZ(tmp[0])); if (ret == 0) ret = gnutls_assert_val (GNUTLS_E_PK_SIG_VERIFY_FAILED); else ret = 0; break; } default: gnutls_assert(); ret = GNUTLS_E_INTERNAL_ERROR; goto cleanup; } cleanup: _gnutls_mpi_release(&tmp[0]); _gnutls_mpi_release(&tmp[1]); return ret; }
/* in case of DSA puts into data, r,s */ static int _wrap_nettle_pk_sign(gnutls_pk_algorithm_t algo, gnutls_datum_t * signature, const gnutls_datum_t * vdata, const gnutls_pk_params_st * pk_params) { int ret; unsigned int hash_len; const mac_entry_st *me; switch (algo) { case GNUTLS_PK_EC: /* we do ECDSA */ { struct ecc_scalar priv; struct dsa_signature sig; int curve_id = pk_params->flags; const struct ecc_curve *curve; curve = get_supported_curve(curve_id); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ret = _ecc_params_to_privkey(pk_params, &priv, curve); if (ret < 0) return gnutls_assert_val(ret); dsa_signature_init(&sig); me = _gnutls_dsa_q_to_hash(algo, pk_params, &hash_len); if (hash_len > vdata->size) { gnutls_assert(); _gnutls_debug_log ("Security level of algorithm requires hash %s(%d) or better\n", _gnutls_mac_get_name(me), hash_len); hash_len = vdata->size; } ecdsa_sign(&priv, NULL, rnd_func, hash_len, vdata->data, &sig); ret = _gnutls_encode_ber_rs(signature, &sig.r, &sig.s); dsa_signature_clear(&sig); ecc_scalar_clear(&priv); if (ret < 0) { gnutls_assert(); goto cleanup; } break; } case GNUTLS_PK_DSA: { struct dsa_public_key pub; struct dsa_private_key priv; struct dsa_signature sig; memset(&priv, 0, sizeof(priv)); memset(&pub, 0, sizeof(pub)); _dsa_params_to_pubkey(pk_params, &pub); _dsa_params_to_privkey(pk_params, &priv); dsa_signature_init(&sig); me = _gnutls_dsa_q_to_hash(algo, pk_params, &hash_len); if (hash_len > vdata->size) { gnutls_assert(); _gnutls_debug_log ("Security level of algorithm requires hash %s(%d) or better\n", _gnutls_mac_get_name(me), hash_len); hash_len = vdata->size; } ret = _dsa_sign(&pub, &priv, NULL, rnd_func, hash_len, vdata->data, &sig); if (ret == 0) { gnutls_assert(); ret = GNUTLS_E_PK_SIGN_FAILED; goto dsa_fail; } ret = _gnutls_encode_ber_rs(signature, &sig.r, &sig.s); dsa_fail: dsa_signature_clear(&sig); if (ret < 0) { gnutls_assert(); goto cleanup; } break; } case GNUTLS_PK_RSA: { struct rsa_private_key priv; struct rsa_public_key pub; mpz_t s; _rsa_params_to_privkey(pk_params, &priv); _rsa_params_to_pubkey(pk_params, &pub); mpz_init(s); ret = rsa_pkcs1_sign_tr(&pub, &priv, NULL, rnd_func, vdata->size, vdata->data, s); if (ret == 0) { gnutls_assert(); ret = GNUTLS_E_PK_SIGN_FAILED; goto rsa_fail; } ret = _gnutls_mpi_dprint_size(s, signature, pub.size); rsa_fail: mpz_clear(s); if (ret < 0) { gnutls_assert(); goto cleanup; } break; } default: gnutls_assert(); ret = GNUTLS_E_INTERNAL_ERROR; goto cleanup; } ret = 0; cleanup: return ret; }
static int _wrap_nettle_pk_derive(gnutls_pk_algorithm_t algo, gnutls_datum_t * out, const gnutls_pk_params_st * priv, const gnutls_pk_params_st * pub) { int ret; switch (algo) { case GNUTLS_PK_EC: { struct ecc_scalar ecc_priv; struct ecc_point ecc_pub; const struct ecc_curve *curve; out->data = NULL; curve = get_supported_curve(priv->flags); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ret = _ecc_params_to_pubkey(pub, &ecc_pub, curve); if (ret < 0) return gnutls_assert_val(ret); ret = _ecc_params_to_privkey(priv, &ecc_priv, curve); if (ret < 0) { ecc_point_clear(&ecc_pub); return gnutls_assert_val(ret); } out->size = gnutls_ecc_curve_get_size(priv->flags); /*ecc_size(curve)*sizeof(mp_limb_t); */ out->data = gnutls_malloc(out->size); if (out->data == NULL) { ret = gnutls_assert_val (GNUTLS_E_MEMORY_ERROR); goto ecc_cleanup; } ecc_shared_secret(&ecc_priv, &ecc_pub, out->data, out->size); ecc_cleanup: ecc_point_clear(&ecc_pub); ecc_scalar_clear(&ecc_priv); if (ret < 0) goto cleanup; break; } default: gnutls_assert(); ret = GNUTLS_E_INTERNAL_ERROR; goto cleanup; } ret = 0; cleanup: return ret; }
static int _wrap_nettle_pk_curve_exists(gnutls_ecc_curve_t curve) { return ((get_supported_curve(curve)!=NULL)?1:0); }
/* This is used for DH or ECDH key derivation. In DH for example * it is given the peers Y and our x, and calculates Y^x */ static int _wrap_nettle_pk_derive(gnutls_pk_algorithm_t algo, gnutls_datum_t * out, const gnutls_pk_params_st * priv, const gnutls_pk_params_st * pub) { int ret; switch (algo) { case GNUTLS_PK_DH: { bigint_t f, x, prime; bigint_t k = NULL, ff = NULL; unsigned int bits; f = pub->params[DH_Y]; x = priv->params[DH_X]; prime = priv->params[DH_P]; ret = _gnutls_mpi_init_multi(&k, &ff, NULL); if (ret < 0) return gnutls_assert_val(ret); ret = _gnutls_mpi_modm(ff, f, prime); if (ret < 0) { gnutls_assert(); goto dh_cleanup; } ret = _gnutls_mpi_add_ui(ff, ff, 1); if (ret < 0) { gnutls_assert(); goto dh_cleanup; } /* check if f==0,1,p-1. * or (ff=f+1) equivalently ff==1,2,p */ if ((_gnutls_mpi_cmp_ui(ff, 2) == 0) || (_gnutls_mpi_cmp_ui(ff, 1) == 0) || (_gnutls_mpi_cmp(ff, prime) == 0)) { gnutls_assert(); ret = GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER; goto dh_cleanup; } /* prevent denial of service */ bits = _gnutls_mpi_get_nbits(prime); if (bits == 0 || bits > MAX_DH_BITS) { gnutls_assert(); ret = GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER; goto dh_cleanup; } ret = _gnutls_mpi_powm(k, f, x, prime); if (ret < 0) { gnutls_assert(); goto dh_cleanup; } ret = _gnutls_mpi_dprint(k, out); if (ret < 0) { gnutls_assert(); goto dh_cleanup; } ret = 0; dh_cleanup: _gnutls_mpi_release(&ff); zrelease_temp_mpi_key(&k); if (ret < 0) goto cleanup; break; } case GNUTLS_PK_EC: { struct ecc_scalar ecc_priv; struct ecc_point ecc_pub; const struct ecc_curve *curve; out->data = NULL; curve = get_supported_curve(priv->flags); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ret = _ecc_params_to_pubkey(pub, &ecc_pub, curve); if (ret < 0) return gnutls_assert_val(ret); ret = _ecc_params_to_privkey(priv, &ecc_priv, curve); if (ret < 0) { ecc_point_clear(&ecc_pub); return gnutls_assert_val(ret); } out->size = gnutls_ecc_curve_get_size(priv->flags); /*ecc_size(curve)*sizeof(mp_limb_t); */ out->data = gnutls_malloc(out->size); if (out->data == NULL) { ret = gnutls_assert_val (GNUTLS_E_MEMORY_ERROR); goto ecc_cleanup; } ecc_shared_secret(&ecc_priv, &ecc_pub, out->data, out->size); ecc_cleanup: ecc_point_clear(&ecc_pub); ecc_scalar_zclear(&ecc_priv); if (ret < 0) goto cleanup; break; } default: gnutls_assert(); ret = GNUTLS_E_INTERNAL_ERROR; goto cleanup; } ret = 0; cleanup: return ret; }
/* To generate a DH key either q must be set in the params or * level should be set to the number of required bits. */ static int wrap_nettle_pk_generate_keys(gnutls_pk_algorithm_t algo, unsigned int level /*bits */ , gnutls_pk_params_st * params) { int ret; unsigned int i; switch (algo) { case GNUTLS_PK_DSA: #ifdef ENABLE_FIPS140 { struct dsa_public_key pub; struct dsa_private_key priv; if (params->params[DSA_Q] == NULL) return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); _dsa_params_to_pubkey(params, &pub); dsa_private_key_init(&priv); mpz_init(pub.y); ret = dsa_generate_dss_keypair(&pub, &priv, NULL, rnd_func, NULL, NULL); if (ret != 1) { gnutls_assert(); ret = GNUTLS_E_PK_GENERATION_ERROR; goto dsa_fail; } ret = _gnutls_mpi_init_multi(¶ms->params[DSA_Y], ¶ms->params[DSA_X], NULL); if (ret < 0) { gnutls_assert(); goto dsa_fail; } mpz_set(TOMPZ(params->params[DSA_Y]), pub.y); mpz_set(TOMPZ(params->params[DSA_X]), priv.x); params->params_nr += 2; dsa_fail: dsa_private_key_clear(&priv); mpz_clear(pub.y); if (ret < 0) goto fail; break; } #endif case GNUTLS_PK_DH: { struct dsa_public_key pub; mpz_t r; mpz_t x, y; int max_tries; unsigned have_q = 0; if (algo != params->algo) return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); _dsa_params_to_pubkey(params, &pub); if (params->params[DSA_Q] != NULL) have_q = 1; /* This check is for the case !ENABLE_FIPS140 */ if (algo == GNUTLS_PK_DSA && have_q == 0) return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST); mpz_init(r); mpz_init(x); mpz_init(y); max_tries = 3; do { if (have_q) { mpz_set(r, pub.q); mpz_sub_ui(r, r, 2); nettle_mpz_random(x, NULL, rnd_func, r); mpz_add_ui(x, x, 1); } else { unsigned size = mpz_sizeinbase(pub.p, 2); if (level == 0) level = MIN(size, DH_EXPONENT_SIZE(size)); nettle_mpz_random_size(x, NULL, rnd_func, level); if (level >= size) mpz_mod(x, x, pub.p); } mpz_powm(y, pub.g, x, pub.p); max_tries--; if (max_tries <= 0) { gnutls_assert(); ret = GNUTLS_E_RANDOM_FAILED; goto dh_fail; } } while(mpz_cmp_ui(y, 1) == 0); ret = _gnutls_mpi_init_multi(¶ms->params[DSA_Y], ¶ms->params[DSA_X], NULL); if (ret < 0) { gnutls_assert(); goto dh_fail; } mpz_set(TOMPZ(params->params[DSA_Y]), y); mpz_set(TOMPZ(params->params[DSA_X]), x); params->params_nr += 2; ret = 0; dh_fail: mpz_clear(r); mpz_clear(x); mpz_clear(y); if (ret < 0) goto fail; break; } case GNUTLS_PK_RSA: { struct rsa_public_key pub; struct rsa_private_key priv; rsa_public_key_init(&pub); rsa_private_key_init(&priv); mpz_set_ui(pub.e, 65537); #ifdef ENABLE_FIPS140 ret = rsa_generate_fips186_4_keypair(&pub, &priv, NULL, rnd_func, NULL, NULL, level); #else ret = rsa_generate_keypair(&pub, &priv, NULL, rnd_func, NULL, NULL, level, 0); #endif if (ret != 1) { gnutls_assert(); ret = GNUTLS_E_PK_GENERATION_ERROR; goto rsa_fail; } params->params_nr = 0; for (i = 0; i < RSA_PRIVATE_PARAMS; i++) { ret = _gnutls_mpi_init(¶ms->params[i]); if (ret < 0) { gnutls_assert(); goto rsa_fail; } params->params_nr++; } mpz_set(TOMPZ(params->params[0]), pub.n); mpz_set(TOMPZ(params->params[1]), pub.e); mpz_set(TOMPZ(params->params[2]), priv.d); mpz_set(TOMPZ(params->params[3]), priv.p); mpz_set(TOMPZ(params->params[4]), priv.q); mpz_set(TOMPZ(params->params[5]), priv.c); mpz_set(TOMPZ(params->params[6]), priv.a); mpz_set(TOMPZ(params->params[7]), priv.b); ret = 0; rsa_fail: rsa_private_key_clear(&priv); rsa_public_key_clear(&pub); if (ret < 0) goto fail; break; } case GNUTLS_PK_EC: { struct ecc_scalar key; struct ecc_point pub; const struct ecc_curve *curve; curve = get_supported_curve(level); if (curve == NULL) return gnutls_assert_val (GNUTLS_E_ECC_UNSUPPORTED_CURVE); ecc_scalar_init(&key, curve); ecc_point_init(&pub, curve); ecdsa_generate_keypair(&pub, &key, NULL, rnd_func); ret = _gnutls_mpi_init_multi(¶ms->params[ECC_X], ¶ms->params[ECC_Y], ¶ms->params[ECC_K], NULL); if (ret < 0) { gnutls_assert(); goto ecc_fail; } params->flags = level; params->params_nr = ECC_PRIVATE_PARAMS; ecc_point_get(&pub, TOMPZ(params->params[ECC_X]), TOMPZ(params->params[ECC_Y])); ecc_scalar_get(&key, TOMPZ(params->params[ECC_K])); ret = 0; ecc_fail: ecc_point_clear(&pub); ecc_scalar_clear(&key); if (ret < 0) goto fail; break; } default: gnutls_assert(); return GNUTLS_E_INVALID_REQUEST; } FAIL_IF_LIB_ERROR; return 0; fail: for (i = 0; i < params->params_nr; i++) { _gnutls_mpi_release(¶ms->params[i]); } params->params_nr = 0; FAIL_IF_LIB_ERROR; return ret; }