--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
+ *
+ * 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.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE. */
+
+#include <openssl/ssl.h>
+
+#include <assert.h>
+#include <string.h>
+
+#include <utility>
+
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+#include <openssl/md5.h>
+#include <openssl/mem.h>
+#include <openssl/nid.h>
+#include <openssl/rand.h>
+
+#include "../crypto/fipsmodule/tls/internal.h"
+#include "../crypto/internal.h"
+#include "internal.h"
+
+
+namespace bssl {
+
+bool tls1_prf(const EVP_MD *digest, Span<uint8_t> out,
+ Span<const uint8_t> secret, Span<const char> label,
+ Span<const uint8_t> seed1, Span<const uint8_t> seed2) {
+ return 1 == CRYPTO_tls1_prf(digest, out.data(), out.size(), secret.data(),
+ secret.size(), label.data(), label.size(),
+ seed1.data(), seed1.size(), seed2.data(),
+ seed2.size());
+}
+
+static bool ssl3_prf(Span<uint8_t> out, Span<const uint8_t> secret,
+ Span<const char> label, Span<const uint8_t> seed1,
+ Span<const uint8_t> seed2) {
+ ScopedEVP_MD_CTX md5;
+ ScopedEVP_MD_CTX sha1;
+ uint8_t buf[16], smd[SHA_DIGEST_LENGTH];
+ uint8_t c = 'A';
+ size_t k = 0;
+ while (!out.empty()) {
+ k++;
+ if (k > sizeof(buf)) {
+ // bug: 'buf' is too small for this ciphersuite
+ OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
+ return false;
+ }
+
+ for (size_t j = 0; j < k; j++) {
+ buf[j] = c;
+ }
+ c++;
+ if (!EVP_DigestInit_ex(sha1.get(), EVP_sha1(), NULL)) {
+ OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
+ return false;
+ }
+ EVP_DigestUpdate(sha1.get(), buf, k);
+ EVP_DigestUpdate(sha1.get(), secret.data(), secret.size());
+ // |label| is ignored for SSLv3.
+ EVP_DigestUpdate(sha1.get(), seed1.data(), seed1.size());
+ EVP_DigestUpdate(sha1.get(), seed2.data(), seed2.size());
+ EVP_DigestFinal_ex(sha1.get(), smd, NULL);
+
+ if (!EVP_DigestInit_ex(md5.get(), EVP_md5(), NULL)) {
+ OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
+ return false;
+ }
+ EVP_DigestUpdate(md5.get(), secret.data(), secret.size());
+ EVP_DigestUpdate(md5.get(), smd, SHA_DIGEST_LENGTH);
+ if (out.size() < MD5_DIGEST_LENGTH) {
+ EVP_DigestFinal_ex(md5.get(), smd, NULL);
+ OPENSSL_memcpy(out.data(), smd, out.size());
+ break;
+ }
+ EVP_DigestFinal_ex(md5.get(), out.data(), NULL);
+ out = out.subspan(MD5_DIGEST_LENGTH);
+ }
+
+ OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH);
+ return true;
+}
+
+static bool get_key_block_lengths(const SSL *ssl, size_t *out_mac_secret_len,
+ size_t *out_key_len, size_t *out_iv_len,
+ const SSL_CIPHER *cipher) {
+ const EVP_AEAD *aead = NULL;
+ if (!ssl_cipher_get_evp_aead(&aead, out_mac_secret_len, out_iv_len, cipher,
+ ssl_protocol_version(ssl), SSL_is_dtls(ssl))) {
+ OPENSSL_PUT_ERROR(SSL, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
+ return false;
+ }
+
+ *out_key_len = EVP_AEAD_key_length(aead);
+ if (*out_mac_secret_len > 0) {
+ // For "stateful" AEADs (i.e. compatibility with pre-AEAD cipher suites) the
+ // key length reported by |EVP_AEAD_key_length| will include the MAC key
+ // bytes and initial implicit IV.
+ if (*out_key_len < *out_mac_secret_len + *out_iv_len) {
+ OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
+ return false;
+ }
+ *out_key_len -= *out_mac_secret_len + *out_iv_len;
+ }
+
+ return true;
+}
+
+int tls1_configure_aead(SSL *ssl, evp_aead_direction_t direction,
+ Array<uint8_t> *key_block_cache,
+ const SSL_CIPHER *cipher,
+ Span<const uint8_t> iv_override) {
+ size_t mac_secret_len, key_len, iv_len;
+ if (!get_key_block_lengths(ssl, &mac_secret_len, &key_len, &iv_len, cipher)) {
+ return 0;
+ }
+
+ // Ensure that |key_block_cache| is set up.
+ const size_t key_block_size = 2 * (mac_secret_len + key_len + iv_len);
+ if (key_block_cache->empty()) {
+ if (!key_block_cache->Init(key_block_size) ||
+ !SSL_generate_key_block(ssl, key_block_cache->data(), key_block_size)) {
+ return 0;
+ }
+ }
+ assert(key_block_cache->size() == key_block_size);
+
+ Span<const uint8_t> key_block = *key_block_cache;
+ Span<const uint8_t> mac_secret, key, iv;
+ if (direction == (ssl->server ? evp_aead_open : evp_aead_seal)) {
+ // Use the client write (server read) keys.
+ mac_secret = key_block.subspan(0, mac_secret_len);
+ key = key_block.subspan(2 * mac_secret_len, key_len);
+ iv = key_block.subspan(2 * mac_secret_len + 2 * key_len, iv_len);
+ } else {
+ // Use the server write (client read) keys.
+ mac_secret = key_block.subspan(mac_secret_len, mac_secret_len);
+ key = key_block.subspan(2 * mac_secret_len + key_len, key_len);
+ iv = key_block.subspan(2 * mac_secret_len + 2 * key_len + iv_len, iv_len);
+ }
+
+ if (!iv_override.empty()) {
+ if (iv_override.size() != iv_len) {
+ return 0;
+ }
+ iv = iv_override;
+ }
+
+ UniquePtr<SSLAEADContext> aead_ctx = SSLAEADContext::Create(
+ direction, ssl->version, SSL_is_dtls(ssl), cipher, key, mac_secret, iv);
+ if (!aead_ctx) {
+ return 0;
+ }
+
+ if (direction == evp_aead_open) {
+ return ssl->method->set_read_state(ssl, std::move(aead_ctx));
+ }
+
+ return ssl->method->set_write_state(ssl, std::move(aead_ctx));
+}
+
+int tls1_change_cipher_state(SSL_HANDSHAKE *hs,
+ evp_aead_direction_t direction) {
+ return tls1_configure_aead(hs->ssl, direction, &hs->key_block,
+ hs->new_cipher, {});
+}
+
+int tls1_generate_master_secret(SSL_HANDSHAKE *hs, uint8_t *out,
+ Span<const uint8_t> premaster) {
+ static const char kMasterSecretLabel[] = "master secret";
+ static const char kExtendedMasterSecretLabel[] = "extended master secret";
+
+ const SSL *ssl = hs->ssl;
+ auto out_span = MakeSpan(out, SSL3_MASTER_SECRET_SIZE);
+ if (hs->extended_master_secret) {
+ auto label = MakeConstSpan(kExtendedMasterSecretLabel,
+ sizeof(kExtendedMasterSecretLabel) - 1);
+ uint8_t digests[EVP_MAX_MD_SIZE];
+ size_t digests_len;
+ if (!hs->transcript.GetHash(digests, &digests_len) ||
+ !tls1_prf(hs->transcript.Digest(), out_span, premaster, label,
+ MakeConstSpan(digests, digests_len), {})) {
+ return 0;
+ }
+ } else {
+ auto label =
+ MakeConstSpan(kMasterSecretLabel, sizeof(kMasterSecretLabel) - 1);
+ if (ssl_protocol_version(ssl) == SSL3_VERSION) {
+ if (!ssl3_prf(out_span, premaster, label, ssl->s3->client_random,
+ ssl->s3->server_random)) {
+ return 0;
+ }
+ } else {
+ if (!tls1_prf(hs->transcript.Digest(), out_span, premaster, label,
+ ssl->s3->client_random, ssl->s3->server_random)) {
+ return 0;
+ }
+ }
+ }
+
+ return SSL3_MASTER_SECRET_SIZE;
+}
+
+} // namespace bssl
+
+using namespace bssl;
+
+size_t SSL_get_key_block_len(const SSL *ssl) {
+ size_t mac_secret_len, key_len, fixed_iv_len;
+ if (!get_key_block_lengths(ssl, &mac_secret_len, &key_len, &fixed_iv_len,
+ SSL_get_current_cipher(ssl))) {
+ ERR_clear_error();
+ return 0;
+ }
+
+ return 2 * (mac_secret_len + key_len + fixed_iv_len);
+}
+
+int SSL_generate_key_block(const SSL *ssl, uint8_t *out, size_t out_len) {
+ const SSL_SESSION *session = SSL_get_session(ssl);
+ auto out_span = MakeSpan(out, out_len);
+ auto master_key =
+ MakeConstSpan(session->master_key, session->master_key_length);
+ static const char kLabel[] = "key expansion";
+ auto label = MakeConstSpan(kLabel, sizeof(kLabel) - 1);
+
+ if (ssl_protocol_version(ssl) == SSL3_VERSION) {
+ return ssl3_prf(out_span, master_key, label, ssl->s3->server_random,
+ ssl->s3->client_random);
+ }
+
+ const EVP_MD *digest = ssl_session_get_digest(session);
+ return tls1_prf(digest, out_span, master_key, label, ssl->s3->server_random,
+ ssl->s3->client_random);
+}
+
+int SSL_export_keying_material(SSL *ssl, uint8_t *out, size_t out_len,
+ const char *label, size_t label_len,
+ const uint8_t *context, size_t context_len,
+ int use_context) {
+ if (!ssl->s3->have_version || ssl->version == SSL3_VERSION) {
+ OPENSSL_PUT_ERROR(SSL, SSL_R_HANDSHAKE_NOT_COMPLETE);
+ return 0;
+ }
+
+ // Exporters may be used in False Start and server 0-RTT, where the handshake
+ // has progressed enough. Otherwise, they may not be used during a handshake.
+ if (SSL_in_init(ssl) &&
+ !SSL_in_false_start(ssl) &&
+ !(SSL_is_server(ssl) && SSL_in_early_data(ssl))) {
+ OPENSSL_PUT_ERROR(SSL, SSL_R_HANDSHAKE_NOT_COMPLETE);
+ return 0;
+ }
+
+ if (ssl_protocol_version(ssl) >= TLS1_3_VERSION) {
+ if (!use_context) {
+ context = nullptr;
+ context_len = 0;
+ }
+ return tls13_export_keying_material(
+ ssl, MakeSpan(out, out_len),
+ MakeConstSpan(ssl->s3->exporter_secret, ssl->s3->exporter_secret_len),
+ MakeConstSpan(label, label_len), MakeConstSpan(context, context_len));
+ }
+
+ size_t seed_len = 2 * SSL3_RANDOM_SIZE;
+ if (use_context) {
+ if (context_len >= 1u << 16) {
+ OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
+ return 0;
+ }
+ seed_len += 2 + context_len;
+ }
+ Array<uint8_t> seed;
+ if (!seed.Init(seed_len)) {
+ OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ OPENSSL_memcpy(seed.data(), ssl->s3->client_random, SSL3_RANDOM_SIZE);
+ OPENSSL_memcpy(seed.data() + SSL3_RANDOM_SIZE, ssl->s3->server_random,
+ SSL3_RANDOM_SIZE);
+ if (use_context) {
+ seed[2 * SSL3_RANDOM_SIZE] = static_cast<uint8_t>(context_len >> 8);
+ seed[2 * SSL3_RANDOM_SIZE + 1] = static_cast<uint8_t>(context_len);
+ OPENSSL_memcpy(seed.data() + 2 * SSL3_RANDOM_SIZE + 2, context, context_len);
+ }
+
+ const SSL_SESSION *session = SSL_get_session(ssl);
+ const EVP_MD *digest = ssl_session_get_digest(session);
+ return tls1_prf(
+ digest, MakeSpan(out, out_len),
+ MakeConstSpan(session->master_key, session->master_key_length),
+ MakeConstSpan(label, label_len), seed, {});
+}
+
+int SSL_export_early_keying_material(
+ SSL *ssl, uint8_t *out, size_t out_len, const char *label, size_t label_len,
+ const uint8_t *context, size_t context_len) {
+ if (!SSL_in_early_data(ssl) &&
+ (!ssl->s3->have_version ||
+ ssl_protocol_version(ssl) < TLS1_3_VERSION)) {
+ OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_SSL_VERSION);
+ return 0;
+ }
+
+ // The early exporter only exists if we accepted early data or offered it as
+ // a client.
+ if (!SSL_in_early_data(ssl) && !SSL_early_data_accepted(ssl)) {
+ OPENSSL_PUT_ERROR(SSL, SSL_R_EARLY_DATA_NOT_IN_USE);
+ return 0;
+ }
+
+ return tls13_export_keying_material(
+ ssl, MakeSpan(out, out_len),
+ MakeConstSpan(ssl->s3->early_exporter_secret,
+ ssl->s3->early_exporter_secret_len),
+ MakeConstSpan(label, label_len), MakeConstSpan(context, context_len));
+}
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