| /* 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" |
| |
| |
| namespace bssl { |
| |
| SSLTranscript::SSLTranscript() {} |
| |
| SSLTranscript::~SSLTranscript() {} |
| |
| bool SSLTranscript::Init() { |
| buffer_.reset(BUF_MEM_new()); |
| if (!buffer_) { |
| return false; |
| } |
| |
| hash_.Reset(); |
| md5_.Reset(); |
| return true; |
| } |
| |
| /* InitDigestWithData calls |EVP_DigestInit_ex| on |ctx| with |md| and then |
| * writes the data in |buf| to it. */ |
| static bool InitDigestWithData(EVP_MD_CTX *ctx, const EVP_MD *md, |
| const BUF_MEM *buf) { |
| if (!EVP_DigestInit_ex(ctx, md, NULL)) { |
| return false; |
| } |
| EVP_DigestUpdate(ctx, buf->data, buf->length); |
| return true; |
| } |
| |
| bool SSLTranscript::InitHash(uint16_t version, const SSL_CIPHER *cipher) { |
| const EVP_MD *md = ssl_get_handshake_digest(version, cipher); |
| |
| /* 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 (!InitDigestWithData(md5_.get(), EVP_md5(), buffer_.get())) { |
| return false; |
| } |
| md = EVP_sha1(); |
| } |
| |
| return InitDigestWithData(hash_.get(), md, buffer_.get()); |
| } |
| |
| void SSLTranscript::FreeBuffer() { |
| buffer_.reset(); |
| } |
| |
| size_t SSLTranscript::DigestLen() const { |
| return EVP_MD_size(Digest()); |
| } |
| |
| const EVP_MD *SSLTranscript::Digest() const { |
| if (EVP_MD_CTX_md(md5_.get()) != nullptr) { |
| return EVP_md5_sha1(); |
| } |
| return EVP_MD_CTX_md(hash_.get()); |
| } |
| |
| bool SSLTranscript::Update(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 (buffer_) { |
| size_t new_len = buffer_->length + in_len; |
| if (new_len < in_len) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); |
| return false; |
| } |
| if (!BUF_MEM_grow(buffer_.get(), new_len)) { |
| return false; |
| } |
| OPENSSL_memcpy(buffer_->data + new_len - in_len, in, in_len); |
| } |
| |
| if (EVP_MD_CTX_md(hash_.get()) != NULL) { |
| EVP_DigestUpdate(hash_.get(), in, in_len); |
| } |
| if (EVP_MD_CTX_md(md5_.get()) != NULL) { |
| EVP_DigestUpdate(md5_.get(), in, in_len); |
| } |
| |
| return true; |
| } |
| |
| bool SSLTranscript::GetHash(uint8_t *out, size_t *out_len) { |
| ScopedEVP_MD_CTX ctx; |
| unsigned md5_len = 0; |
| if (EVP_MD_CTX_md(md5_.get()) != NULL) { |
| if (!EVP_MD_CTX_copy_ex(ctx.get(), md5_.get()) || |
| !EVP_DigestFinal_ex(ctx.get(), out, &md5_len)) { |
| return false; |
| } |
| } |
| |
| unsigned len; |
| if (!EVP_MD_CTX_copy_ex(ctx.get(), hash_.get()) || |
| !EVP_DigestFinal_ex(ctx.get(), out + md5_len, &len)) { |
| return false; |
| } |
| |
| *out_len = md5_len + len; |
| return true; |
| } |
| |
| static bool SSL3HandshakeMAC(const SSL_SESSION *session, |
| const EVP_MD_CTX *ctx_template, const char *sender, |
| size_t sender_len, uint8_t *p, size_t *out_len) { |
| ScopedEVP_MD_CTX ctx; |
| if (!EVP_MD_CTX_copy_ex(ctx.get(), ctx_template)) { |
| OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP); |
| return false; |
| } |
| |
| 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, |
| }; |
| |
| size_t n = EVP_MD_CTX_size(ctx.get()); |
| |
| size_t npad = (48 / n) * n; |
| EVP_DigestUpdate(ctx.get(), sender, sender_len); |
| EVP_DigestUpdate(ctx.get(), session->master_key, session->master_key_length); |
| EVP_DigestUpdate(ctx.get(), kPad1, npad); |
| unsigned md_buf_len; |
| uint8_t md_buf[EVP_MAX_MD_SIZE]; |
| EVP_DigestFinal_ex(ctx.get(), md_buf, &md_buf_len); |
| |
| if (!EVP_DigestInit_ex(ctx.get(), EVP_MD_CTX_md(ctx.get()), NULL)) { |
| OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP); |
| return false; |
| } |
| EVP_DigestUpdate(ctx.get(), session->master_key, session->master_key_length); |
| EVP_DigestUpdate(ctx.get(), kPad2, npad); |
| EVP_DigestUpdate(ctx.get(), md_buf, md_buf_len); |
| unsigned len; |
| EVP_DigestFinal_ex(ctx.get(), p, &len); |
| |
| *out_len = len; |
| return true; |
| } |
| |
| bool SSLTranscript::GetSSL3CertVerifyHash(uint8_t *out, size_t *out_len, |
| const SSL_SESSION *session, |
| uint16_t signature_algorithm) { |
| if (Digest() != EVP_md5_sha1()) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| return false; |
| } |
| |
| if (signature_algorithm == SSL_SIGN_RSA_PKCS1_MD5_SHA1) { |
| size_t md5_len, len; |
| if (!SSL3HandshakeMAC(session, md5_.get(), NULL, 0, out, &md5_len) || |
| !SSL3HandshakeMAC(session, hash_.get(), NULL, 0, out + md5_len, &len)) { |
| return false; |
| } |
| *out_len = md5_len + len; |
| return true; |
| } |
| |
| if (signature_algorithm == SSL_SIGN_ECDSA_SHA1) { |
| return SSL3HandshakeMAC(session, hash_.get(), NULL, 0, out, out_len); |
| } |
| |
| OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| return false; |
| } |
| |
| bool SSLTranscript::GetFinishedMAC(uint8_t *out, size_t *out_len, |
| const SSL_SESSION *session, bool from_server, |
| uint16_t version) { |
| if (version == SSL3_VERSION) { |
| if (Digest() != EVP_md5_sha1()) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| return false; |
| } |
| |
| 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 (!SSL3HandshakeMAC(session, md5_.get(), sender, sender_len, out, |
| &md5_len) || |
| !SSL3HandshakeMAC(session, hash_.get(), sender, sender_len, |
| out + md5_len, &len)) { |
| return false; |
| } |
| |
| *out_len = md5_len + len; |
| return true; |
| } |
| |
| /* At this point, the handshake should have released the handshake buffer on |
| * its own. */ |
| assert(!buffer_); |
| |
| 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 (!GetHash(digests, &digests_len)) { |
| return false; |
| } |
| |
| static const size_t kFinishedLen = 12; |
| if (!tls1_prf(Digest(), out, kFinishedLen, session->master_key, |
| session->master_key_length, label, label_len, digests, |
| digests_len, NULL, 0)) { |
| return false; |
| } |
| |
| *out_len = kFinishedLen; |
| return true; |
| } |
| |
| } // namespace bssl |