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- /* 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 <openssl/buf.h>
- #include <openssl/digest.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
- #include <openssl/md5.h>
- #include <openssl/nid.h>
- #include <openssl/sha.h>
-
- #include "../crypto/internal.h"
- #include "internal.h"
-
-
- int SSL_TRANSCRIPT_init(SSL_TRANSCRIPT *transcript) {
- SSL_TRANSCRIPT_cleanup(transcript);
- transcript->buffer = BUF_MEM_new();
- return transcript->buffer != NULL;
- }
-
- /* init_digest_with_data calls |EVP_DigestInit_ex| on |ctx| with |md| and then
- * writes the data in |buf| to it. */
- static int init_digest_with_data(EVP_MD_CTX *ctx, const EVP_MD *md,
- const BUF_MEM *buf) {
- if (!EVP_DigestInit_ex(ctx, md, NULL)) {
- return 0;
- }
- EVP_DigestUpdate(ctx, buf->data, buf->length);
- return 1;
- }
-
- int SSL_TRANSCRIPT_init_hash(SSL_TRANSCRIPT *transcript, uint16_t version,
- int algorithm_prf) {
- const EVP_MD *md = ssl_get_handshake_digest(algorithm_prf, version);
-
- /* To support SSL 3.0's Finished and CertificateVerify constructions,
- * EVP_md5_sha1() is split into MD5 and SHA-1 halves. When SSL 3.0 is removed,
- * we can simplify this. */
- if (md == EVP_md5_sha1()) {
- if (!init_digest_with_data(&transcript->md5, EVP_md5(),
- transcript->buffer)) {
- return 0;
- }
- md = EVP_sha1();
- }
-
- if (!init_digest_with_data(&transcript->hash, md, transcript->buffer)) {
- return 0;
- }
-
- return 1;
- }
-
- void SSL_TRANSCRIPT_cleanup(SSL_TRANSCRIPT *transcript) {
- SSL_TRANSCRIPT_free_buffer(transcript);
- EVP_MD_CTX_cleanup(&transcript->hash);
- EVP_MD_CTX_cleanup(&transcript->md5);
- }
-
- void SSL_TRANSCRIPT_free_buffer(SSL_TRANSCRIPT *transcript) {
- BUF_MEM_free(transcript->buffer);
- transcript->buffer = NULL;
- }
-
- size_t SSL_TRANSCRIPT_digest_len(const SSL_TRANSCRIPT *transcript) {
- return EVP_MD_size(SSL_TRANSCRIPT_md(transcript));
- }
-
- const EVP_MD *SSL_TRANSCRIPT_md(const SSL_TRANSCRIPT *transcript) {
- if (EVP_MD_CTX_md(&transcript->md5) != NULL) {
- return EVP_md5_sha1();
- }
- return EVP_MD_CTX_md(&transcript->hash);
- }
-
- int SSL_TRANSCRIPT_update(SSL_TRANSCRIPT *transcript, const uint8_t *in,
- size_t in_len) {
- /* Depending on the state of the handshake, either the handshake buffer may be
- * active, the rolling hash, or both. */
- if (transcript->buffer != NULL) {
- size_t new_len = transcript->buffer->length + in_len;
- if (new_len < in_len) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
- return 0;
- }
- if (!BUF_MEM_grow(transcript->buffer, new_len)) {
- return 0;
- }
- OPENSSL_memcpy(transcript->buffer->data + new_len - in_len, in, in_len);
- }
-
- if (EVP_MD_CTX_md(&transcript->hash) != NULL) {
- EVP_DigestUpdate(&transcript->hash, in, in_len);
- }
- if (EVP_MD_CTX_md(&transcript->md5) != NULL) {
- EVP_DigestUpdate(&transcript->md5, in, in_len);
- }
-
- return 1;
- }
-
- int SSL_TRANSCRIPT_get_hash(const SSL_TRANSCRIPT *transcript, uint8_t *out,
- size_t *out_len) {
- int ret = 0;
- EVP_MD_CTX ctx;
- EVP_MD_CTX_init(&ctx);
- unsigned md5_len = 0;
- if (EVP_MD_CTX_md(&transcript->md5) != NULL) {
- if (!EVP_MD_CTX_copy_ex(&ctx, &transcript->md5) ||
- !EVP_DigestFinal_ex(&ctx, out, &md5_len)) {
- goto err;
- }
- }
-
- unsigned len;
- if (!EVP_MD_CTX_copy_ex(&ctx, &transcript->hash) ||
- !EVP_DigestFinal_ex(&ctx, out + md5_len, &len)) {
- goto err;
- }
-
- *out_len = md5_len + len;
- ret = 1;
-
- err:
- EVP_MD_CTX_cleanup(&ctx);
- return ret;
- }
-
- static int ssl3_handshake_mac(SSL_TRANSCRIPT *transcript,
- const SSL_SESSION *session,
- const EVP_MD_CTX *ctx_template,
- const char *sender, size_t sender_len,
- uint8_t *p, size_t *out_len) {
- unsigned int len;
- size_t npad, n;
- unsigned int i;
- uint8_t md_buf[EVP_MAX_MD_SIZE];
- EVP_MD_CTX ctx;
-
- EVP_MD_CTX_init(&ctx);
- if (!EVP_MD_CTX_copy_ex(&ctx, ctx_template)) {
- EVP_MD_CTX_cleanup(&ctx);
- OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
- return 0;
- }
-
- static const uint8_t kPad1[48] = {
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- };
-
- static const uint8_t kPad2[48] = {
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- };
-
- n = EVP_MD_CTX_size(&ctx);
-
- npad = (48 / n) * n;
- if (sender != NULL) {
- EVP_DigestUpdate(&ctx, sender, sender_len);
- }
- EVP_DigestUpdate(&ctx, session->master_key, session->master_key_length);
- EVP_DigestUpdate(&ctx, kPad1, npad);
- EVP_DigestFinal_ex(&ctx, md_buf, &i);
-
- if (!EVP_DigestInit_ex(&ctx, EVP_MD_CTX_md(&ctx), NULL)) {
- EVP_MD_CTX_cleanup(&ctx);
- OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
- return 0;
- }
- EVP_DigestUpdate(&ctx, session->master_key, session->master_key_length);
- EVP_DigestUpdate(&ctx, kPad2, npad);
- EVP_DigestUpdate(&ctx, md_buf, i);
- EVP_DigestFinal_ex(&ctx, p, &len);
-
- EVP_MD_CTX_cleanup(&ctx);
-
- *out_len = len;
- return 1;
- }
-
- int SSL_TRANSCRIPT_ssl3_cert_verify_hash(SSL_TRANSCRIPT *transcript,
- uint8_t *out, size_t *out_len,
- const SSL_SESSION *session,
- int signature_algorithm) {
- if (SSL_TRANSCRIPT_md(transcript) != EVP_md5_sha1()) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- if (signature_algorithm == SSL_SIGN_RSA_PKCS1_MD5_SHA1) {
- size_t md5_len, len;
- if (!ssl3_handshake_mac(transcript, session, &transcript->md5, NULL, 0, out,
- &md5_len) ||
- !ssl3_handshake_mac(transcript, session, &transcript->hash, NULL, 0,
- out + md5_len, &len)) {
- return 0;
- }
- *out_len = md5_len + len;
- return 1;
- }
-
- if (signature_algorithm == SSL_SIGN_ECDSA_SHA1) {
- return ssl3_handshake_mac(transcript, session, &transcript->hash, NULL, 0,
- out, out_len);
- }
-
- OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- int SSL_TRANSCRIPT_finish_mac(SSL_TRANSCRIPT *transcript, uint8_t *out,
- size_t *out_len, const SSL_SESSION *session,
- int from_server, uint16_t version) {
- if (version == SSL3_VERSION) {
- if (SSL_TRANSCRIPT_md(transcript) != EVP_md5_sha1()) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- const char *sender = from_server ? SSL3_MD_SERVER_FINISHED_CONST
- : SSL3_MD_CLIENT_FINISHED_CONST;
- const size_t sender_len = 4;
- size_t md5_len, len;
- if (!ssl3_handshake_mac(transcript, session, &transcript->md5, sender,
- sender_len, out, &md5_len) ||
- !ssl3_handshake_mac(transcript, session, &transcript->hash, sender,
- sender_len, out + md5_len, &len)) {
- return 0;
- }
-
- *out_len = md5_len + len;
- return 1;
- }
-
- /* At this point, the handshake should have released the handshake buffer on
- * its own. */
- assert(transcript->buffer == NULL);
-
- const char *label = TLS_MD_CLIENT_FINISH_CONST;
- size_t label_len = TLS_MD_SERVER_FINISH_CONST_SIZE;
- if (from_server) {
- label = TLS_MD_SERVER_FINISH_CONST;
- label_len = TLS_MD_SERVER_FINISH_CONST_SIZE;
- }
-
- uint8_t digests[EVP_MAX_MD_SIZE];
- size_t digests_len;
- if (!SSL_TRANSCRIPT_get_hash(transcript, digests, &digests_len)) {
- return 0;
- }
-
- static const size_t kFinishedLen = 12;
- if (!tls1_prf(SSL_TRANSCRIPT_md(transcript), out, kFinishedLen,
- session->master_key, session->master_key_length, label,
- label_len, digests, digests_len, NULL, 0)) {
- return 0;
- }
-
- *out_len = kFinishedLen;
- return 1;
- }
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