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+/*
+ * Copyright (c) 2017-2020, [Ribose Inc](https://www.ribose.com).
+ * Copyright (c) 2009 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is originally derived from software contributed to
+ * The NetBSD Foundation by Alistair Crooks (agc@netbsd.org), and
+ * carried further by Ribose Inc (https://www.ribose.com).
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 2005-2008 Nominet UK (www.nic.uk)
+ * All rights reserved.
+ * Contributors: Ben Laurie, Rachel Willmer. The Contributors have asserted
+ * their moral rights under the UK Copyright Design and Patents Act 1988 to
+ * be recorded as the authors of this copyright work.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "config.h"
+
+#ifdef HAVE_SYS_CDEFS_H
+#include <sys/cdefs.h>
+#endif
+
+#if defined(__NetBSD__)
+__COPYRIGHT("@(#) Copyright (c) 2009 The NetBSD Foundation, Inc. All rights reserved.");
+__RCSID("$NetBSD: crypto.c,v 1.36 2014/02/17 07:39:19 agc Exp $");
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <string.h>
+#include <time.h>
+#include <rnp/rnp_def.h>
+
+#include <librepgp/stream-packet.h>
+#include <librepgp/stream-key.h>
+
+#include "types.h"
+#include "crypto/common.h"
+#include "crypto.h"
+#include "fingerprint.h"
+#include "pgp-key.h"
+#include "utils.h"
+
+bool
+pgp_generate_seckey(const rnp_keygen_crypto_params_t &crypto,
+ pgp_key_pkt_t & seckey,
+ bool primary)
+{
+ /* populate pgp key structure */
+ seckey = {};
+ seckey.version = PGP_V4;
+ seckey.creation_time = crypto.ctx->time();
+ seckey.alg = crypto.key_alg;
+ seckey.material.alg = crypto.key_alg;
+ seckey.tag = primary ? PGP_PKT_SECRET_KEY : PGP_PKT_SECRET_SUBKEY;
+
+ switch (seckey.alg) {
+ case PGP_PKA_RSA:
+ if (rsa_generate(&crypto.ctx->rng, &seckey.material.rsa, crypto.rsa.modulus_bit_len)) {
+ RNP_LOG("failed to generate RSA key");
+ return false;
+ }
+ break;
+ case PGP_PKA_DSA:
+ if (dsa_generate(&crypto.ctx->rng,
+ &seckey.material.dsa,
+ crypto.dsa.p_bitlen,
+ crypto.dsa.q_bitlen)) {
+ RNP_LOG("failed to generate DSA key");
+ return false;
+ }
+ break;
+ case PGP_PKA_EDDSA:
+ if (eddsa_generate(&crypto.ctx->rng, &seckey.material.ec)) {
+ RNP_LOG("failed to generate EDDSA key");
+ return false;
+ }
+ break;
+ case PGP_PKA_ECDH:
+ if (!ecdh_set_params(&seckey.material.ec, crypto.ecc.curve)) {
+ RNP_LOG("Unsupported curve [ID=%d]", crypto.ecc.curve);
+ return false;
+ }
+ if (crypto.ecc.curve == PGP_CURVE_25519) {
+ if (x25519_generate(&crypto.ctx->rng, &seckey.material.ec)) {
+ RNP_LOG("failed to generate x25519 key");
+ return false;
+ }
+ seckey.material.ec.curve = crypto.ecc.curve;
+ break;
+ }
+ [[fallthrough]];
+ case PGP_PKA_ECDSA:
+ case PGP_PKA_SM2:
+ if (!curve_supported(crypto.ecc.curve)) {
+ RNP_LOG("EC generate: curve %d is not supported.", (int) crypto.ecc.curve);
+ return false;
+ }
+ if (ec_generate(&crypto.ctx->rng, &seckey.material.ec, seckey.alg, crypto.ecc.curve)) {
+ RNP_LOG("failed to generate EC key");
+ return false;
+ }
+ seckey.material.ec.curve = crypto.ecc.curve;
+ break;
+ case PGP_PKA_ELGAMAL:
+ if (elgamal_generate(
+ &crypto.ctx->rng, &seckey.material.eg, crypto.elgamal.key_bitlen)) {
+ RNP_LOG("failed to generate ElGamal key");
+ return false;
+ }
+ break;
+ default:
+ RNP_LOG("key generation not implemented for PK alg: %d", seckey.alg);
+ return false;
+ }
+ seckey.sec_protection.s2k.usage = PGP_S2KU_NONE;
+ seckey.material.secret = true;
+ seckey.material.validity.mark_valid();
+ /* fill the sec_data/sec_len */
+ if (encrypt_secret_key(&seckey, NULL, crypto.ctx->rng)) {
+ RNP_LOG("failed to fill sec_data");
+ return false;
+ }
+ return true;
+}
+
+bool
+key_material_equal(const pgp_key_material_t *key1, const pgp_key_material_t *key2)
+{
+ if (key1->alg != key2->alg) {
+ return false;
+ }
+
+ switch (key1->alg) {
+ case PGP_PKA_RSA:
+ case PGP_PKA_RSA_ENCRYPT_ONLY:
+ case PGP_PKA_RSA_SIGN_ONLY:
+ return mpi_equal(&key1->rsa.n, &key2->rsa.n) && mpi_equal(&key1->rsa.e, &key2->rsa.e);
+ case PGP_PKA_DSA:
+ return mpi_equal(&key1->dsa.p, &key2->dsa.p) &&
+ mpi_equal(&key1->dsa.q, &key2->dsa.q) &&
+ mpi_equal(&key1->dsa.g, &key2->dsa.g) && mpi_equal(&key1->dsa.y, &key2->dsa.y);
+ case PGP_PKA_ELGAMAL:
+ case PGP_PKA_ELGAMAL_ENCRYPT_OR_SIGN:
+ return mpi_equal(&key1->eg.p, &key2->eg.p) && mpi_equal(&key1->eg.g, &key2->eg.g) &&
+ mpi_equal(&key1->eg.y, &key2->eg.y);
+ case PGP_PKA_EDDSA:
+ case PGP_PKA_ECDH:
+ case PGP_PKA_ECDSA:
+ case PGP_PKA_SM2:
+ return (key1->ec.curve == key2->ec.curve) && mpi_equal(&key1->ec.p, &key2->ec.p);
+ default:
+ RNP_LOG("unknown public key algorithm: %d", (int) key1->alg);
+ return false;
+ }
+}
+
+rnp_result_t
+validate_pgp_key_material(const pgp_key_material_t *material, rnp::RNG *rng)
+{
+#ifdef FUZZERS_ENABLED
+ /* do not timeout on large keys during fuzzing */
+ return RNP_SUCCESS;
+#else
+ switch (material->alg) {
+ case PGP_PKA_RSA:
+ case PGP_PKA_RSA_ENCRYPT_ONLY:
+ case PGP_PKA_RSA_SIGN_ONLY:
+ return rsa_validate_key(rng, &material->rsa, material->secret);
+ case PGP_PKA_DSA:
+ return dsa_validate_key(rng, &material->dsa, material->secret);
+ case PGP_PKA_EDDSA:
+ return eddsa_validate_key(rng, &material->ec, material->secret);
+ case PGP_PKA_ECDH:
+ if (!curve_supported(material->ec.curve)) {
+ /* allow to import key if curve is not supported */
+ RNP_LOG("ECDH validate: curve %d is not supported.", (int) material->ec.curve);
+ return RNP_SUCCESS;
+ }
+ return ecdh_validate_key(rng, &material->ec, material->secret);
+ case PGP_PKA_ECDSA:
+ if (!curve_supported(material->ec.curve)) {
+ /* allow to import key if curve is not supported */
+ RNP_LOG("ECDH validate: curve %d is not supported.", (int) material->ec.curve);
+ return RNP_SUCCESS;
+ }
+ return ecdsa_validate_key(rng, &material->ec, material->secret);
+ case PGP_PKA_SM2:
+#if defined(ENABLE_SM2)
+ return sm2_validate_key(rng, &material->ec, material->secret);
+#else
+ RNP_LOG("SM2 key validation is not available.");
+ return RNP_ERROR_NOT_IMPLEMENTED;
+#endif
+ case PGP_PKA_ELGAMAL:
+ case PGP_PKA_ELGAMAL_ENCRYPT_OR_SIGN:
+ return elgamal_validate_key(&material->eg, material->secret) ? RNP_SUCCESS :
+ RNP_ERROR_GENERIC;
+ default:
+ RNP_LOG("unknown public key algorithm: %d", (int) material->alg);
+ }
+
+ return RNP_ERROR_BAD_PARAMETERS;
+#endif
+}
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