Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 7 | * |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 14 | * |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 21 | * |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 39 | * |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 51 | * |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] |
| 56 | */ |
| 57 | /* ==================================================================== |
| 58 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
| 59 | * |
| 60 | * Redistribution and use in source and binary forms, with or without |
| 61 | * modification, are permitted provided that the following conditions |
| 62 | * are met: |
| 63 | * |
| 64 | * 1. Redistributions of source code must retain the above copyright |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 65 | * notice, this list of conditions and the following disclaimer. |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 66 | * |
| 67 | * 2. Redistributions in binary form must reproduce the above copyright |
| 68 | * notice, this list of conditions and the following disclaimer in |
| 69 | * the documentation and/or other materials provided with the |
| 70 | * distribution. |
| 71 | * |
| 72 | * 3. All advertising materials mentioning features or use of this |
| 73 | * software must display the following acknowledgment: |
| 74 | * "This product includes software developed by the OpenSSL Project |
| 75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 76 | * |
| 77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 78 | * endorse or promote products derived from this software without |
| 79 | * prior written permission. For written permission, please contact |
| 80 | * openssl-core@openssl.org. |
| 81 | * |
| 82 | * 5. Products derived from this software may not be called "OpenSSL" |
| 83 | * nor may "OpenSSL" appear in their names without prior written |
| 84 | * permission of the OpenSSL Project. |
| 85 | * |
| 86 | * 6. Redistributions of any form whatsoever must retain the following |
| 87 | * acknowledgment: |
| 88 | * "This product includes software developed by the OpenSSL Project |
| 89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 90 | * |
| 91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 102 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 103 | * ==================================================================== |
| 104 | * |
| 105 | * This product includes cryptographic software written by Eric Young |
| 106 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 107 | * Hudson (tjh@cryptsoft.com). |
| 108 | * |
| 109 | */ |
| 110 | /* ==================================================================== |
| 111 | * Copyright 2005 Nokia. All rights reserved. |
| 112 | * |
| 113 | * The portions of the attached software ("Contribution") is developed by |
| 114 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source |
| 115 | * license. |
| 116 | * |
| 117 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of |
| 118 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites |
| 119 | * support (see RFC 4279) to OpenSSL. |
| 120 | * |
| 121 | * No patent licenses or other rights except those expressly stated in |
| 122 | * the OpenSSL open source license shall be deemed granted or received |
| 123 | * expressly, by implication, estoppel, or otherwise. |
| 124 | * |
| 125 | * No assurances are provided by Nokia that the Contribution does not |
| 126 | * infringe the patent or other intellectual property rights of any third |
| 127 | * party or that the license provides you with all the necessary rights |
| 128 | * to make use of the Contribution. |
| 129 | * |
| 130 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN |
| 131 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA |
| 132 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY |
| 133 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR |
| 134 | * OTHERWISE. */ |
| 135 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 136 | #include <openssl/ssl.h> |
| 137 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 138 | #include <assert.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 139 | #include <stdio.h> |
| 140 | #include <string.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 141 | |
| 142 | #include <openssl/err.h> |
| 143 | #include <openssl/evp.h> |
| 144 | #include <openssl/mem.h> |
| 145 | #include <openssl/md5.h> |
| 146 | #include <openssl/obj.h> |
| 147 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 148 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 149 | |
| 150 | |
| 151 | static const uint8_t ssl3_pad_1[48] = { |
| 152 | 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, |
| 153 | 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, |
| 154 | 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, |
| 155 | 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, |
| 156 | }; |
| 157 | |
| 158 | static const uint8_t ssl3_pad_2[48] = { |
| 159 | 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, |
| 160 | 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, |
| 161 | 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, |
| 162 | 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, |
| 163 | }; |
| 164 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 165 | static int ssl3_handshake_mac(SSL *ssl, int md_nid, const char *sender, int len, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 166 | uint8_t *p); |
| 167 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 168 | int ssl3_prf(SSL *ssl, uint8_t *out, size_t out_len, const uint8_t *secret, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 169 | size_t secret_len, const char *label, size_t label_len, |
| 170 | const uint8_t *seed1, size_t seed1_len, |
| 171 | const uint8_t *seed2, size_t seed2_len) { |
| 172 | EVP_MD_CTX md5; |
| 173 | EVP_MD_CTX sha1; |
| 174 | uint8_t buf[16], smd[SHA_DIGEST_LENGTH]; |
| 175 | uint8_t c = 'A'; |
| 176 | size_t i, j, k; |
| 177 | |
| 178 | k = 0; |
| 179 | EVP_MD_CTX_init(&md5); |
| 180 | EVP_MD_CTX_init(&sha1); |
| 181 | for (i = 0; i < out_len; i += MD5_DIGEST_LENGTH) { |
| 182 | k++; |
| 183 | if (k > sizeof(buf)) { |
| 184 | /* bug: 'buf' is too small for this ciphersuite */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 185 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | for (j = 0; j < k; j++) { |
| 190 | buf[j] = c; |
| 191 | } |
| 192 | c++; |
| 193 | if (!EVP_DigestInit_ex(&sha1, EVP_sha1(), NULL)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 194 | OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 195 | return 0; |
| 196 | } |
| 197 | EVP_DigestUpdate(&sha1, buf, k); |
| 198 | EVP_DigestUpdate(&sha1, secret, secret_len); |
| 199 | /* |label| is ignored for SSLv3. */ |
| 200 | if (seed1_len) { |
| 201 | EVP_DigestUpdate(&sha1, seed1, seed1_len); |
| 202 | } |
| 203 | if (seed2_len) { |
| 204 | EVP_DigestUpdate(&sha1, seed2, seed2_len); |
| 205 | } |
| 206 | EVP_DigestFinal_ex(&sha1, smd, NULL); |
| 207 | |
| 208 | if (!EVP_DigestInit_ex(&md5, EVP_md5(), NULL)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 209 | OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 210 | return 0; |
| 211 | } |
| 212 | EVP_DigestUpdate(&md5, secret, secret_len); |
| 213 | EVP_DigestUpdate(&md5, smd, SHA_DIGEST_LENGTH); |
| 214 | if (i + MD5_DIGEST_LENGTH > out_len) { |
| 215 | EVP_DigestFinal_ex(&md5, smd, NULL); |
| 216 | memcpy(out, smd, out_len - i); |
| 217 | } else { |
| 218 | EVP_DigestFinal_ex(&md5, out, NULL); |
| 219 | } |
| 220 | |
| 221 | out += MD5_DIGEST_LENGTH; |
| 222 | } |
| 223 | |
| 224 | OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH); |
| 225 | EVP_MD_CTX_cleanup(&md5); |
| 226 | EVP_MD_CTX_cleanup(&sha1); |
| 227 | |
| 228 | return 1; |
| 229 | } |
| 230 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 231 | void ssl3_cleanup_key_block(SSL *ssl) { |
| 232 | if (ssl->s3->tmp.key_block != NULL) { |
| 233 | OPENSSL_cleanse(ssl->s3->tmp.key_block, ssl->s3->tmp.key_block_length); |
| 234 | OPENSSL_free(ssl->s3->tmp.key_block); |
| 235 | ssl->s3->tmp.key_block = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 236 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 237 | ssl->s3->tmp.key_block_length = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 238 | } |
| 239 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 240 | int ssl3_init_handshake_buffer(SSL *ssl) { |
| 241 | ssl3_free_handshake_buffer(ssl); |
| 242 | ssl3_free_handshake_hash(ssl); |
| 243 | ssl->s3->handshake_buffer = BUF_MEM_new(); |
| 244 | return ssl->s3->handshake_buffer != NULL; |
| 245 | } |
| 246 | |
| 247 | /* init_digest_with_data calls |EVP_DigestInit_ex| on |ctx| with |md| and then |
| 248 | * writes the data in |buf| to it. */ |
| 249 | static int init_digest_with_data(EVP_MD_CTX *ctx, const EVP_MD *md, |
| 250 | const BUF_MEM *buf) { |
| 251 | if (!EVP_DigestInit_ex(ctx, md, NULL)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 252 | return 0; |
| 253 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 254 | EVP_DigestUpdate(ctx, buf->data, buf->length); |
| 255 | return 1; |
| 256 | } |
| 257 | |
| 258 | int ssl3_init_handshake_hash(SSL *ssl) { |
| 259 | ssl3_free_handshake_hash(ssl); |
| 260 | |
| 261 | uint32_t algorithm_prf = ssl_get_algorithm_prf(ssl); |
| 262 | if (!init_digest_with_data(&ssl->s3->handshake_hash, |
| 263 | ssl_get_handshake_digest(algorithm_prf), |
| 264 | ssl->s3->handshake_buffer)) { |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | if (algorithm_prf == SSL_HANDSHAKE_MAC_DEFAULT && |
| 269 | !init_digest_with_data(&ssl->s3->handshake_md5, EVP_md5(), |
| 270 | ssl->s3->handshake_buffer)) { |
| 271 | return 0; |
| 272 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 273 | |
| 274 | return 1; |
| 275 | } |
| 276 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 277 | void ssl3_free_handshake_hash(SSL *ssl) { |
| 278 | EVP_MD_CTX_cleanup(&ssl->s3->handshake_hash); |
| 279 | EVP_MD_CTX_cleanup(&ssl->s3->handshake_md5); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 280 | } |
| 281 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 282 | void ssl3_free_handshake_buffer(SSL *ssl) { |
| 283 | BUF_MEM_free(ssl->s3->handshake_buffer); |
| 284 | ssl->s3->handshake_buffer = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 285 | } |
| 286 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 287 | int ssl3_update_handshake_hash(SSL *ssl, const uint8_t *in, size_t in_len) { |
| 288 | /* Depending on the state of the handshake, either the handshake buffer may be |
| 289 | * active, the rolling hash, or both. */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 290 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 291 | if (ssl->s3->handshake_buffer != NULL) { |
| 292 | size_t new_len = ssl->s3->handshake_buffer->length + in_len; |
| 293 | if (new_len < in_len) { |
| 294 | OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); |
| 295 | return 0; |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 296 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 297 | if (!BUF_MEM_grow(ssl->s3->handshake_buffer, new_len)) { |
| 298 | return 0; |
| 299 | } |
| 300 | memcpy(ssl->s3->handshake_buffer->data + new_len - in_len, in, in_len); |
Adam Langley | 1e4884f | 2015-09-24 10:57:52 -0700 | [diff] [blame] | 301 | } |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 302 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 303 | if (EVP_MD_CTX_md(&ssl->s3->handshake_hash) != NULL) { |
| 304 | EVP_DigestUpdate(&ssl->s3->handshake_hash, in, in_len); |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 305 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 306 | if (EVP_MD_CTX_md(&ssl->s3->handshake_md5) != NULL) { |
| 307 | EVP_DigestUpdate(&ssl->s3->handshake_md5, in, in_len); |
| 308 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 309 | return 1; |
| 310 | } |
| 311 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 312 | int ssl3_cert_verify_mac(SSL *ssl, int md_nid, uint8_t *p) { |
| 313 | return ssl3_handshake_mac(ssl, md_nid, NULL, 0, p); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 314 | } |
| 315 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 316 | int ssl3_final_finish_mac(SSL *ssl, const char *sender, int len, uint8_t *p) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 317 | int ret, sha1len; |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 318 | ret = ssl3_handshake_mac(ssl, NID_md5, sender, len, p); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 319 | if (ret == 0) { |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | p += ret; |
| 324 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 325 | sha1len = ssl3_handshake_mac(ssl, NID_sha1, sender, len, p); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 326 | if (sha1len == 0) { |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | ret += sha1len; |
| 331 | return ret; |
| 332 | } |
| 333 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 334 | static int ssl3_handshake_mac(SSL *ssl, int md_nid, const char *sender, int len, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 335 | uint8_t *p) { |
| 336 | unsigned int ret; |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 337 | size_t npad, n; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 338 | unsigned int i; |
| 339 | uint8_t md_buf[EVP_MAX_MD_SIZE]; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 340 | EVP_MD_CTX ctx; |
| 341 | const EVP_MD_CTX *ctx_template; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 342 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 343 | if (md_nid == NID_md5) { |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 344 | ctx_template = &ssl->s3->handshake_md5; |
| 345 | } else if (md_nid == EVP_MD_CTX_type(&ssl->s3->handshake_hash)) { |
| 346 | ctx_template = &ssl->s3->handshake_hash; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 347 | } else { |
| 348 | OPENSSL_PUT_ERROR(SSL, SSL_R_NO_REQUIRED_DIGEST); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | EVP_MD_CTX_init(&ctx); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 353 | if (!EVP_MD_CTX_copy_ex(&ctx, ctx_template)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 354 | EVP_MD_CTX_cleanup(&ctx); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 355 | OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | n = EVP_MD_CTX_size(&ctx); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 360 | |
| 361 | npad = (48 / n) * n; |
| 362 | if (sender != NULL) { |
| 363 | EVP_DigestUpdate(&ctx, sender, len); |
| 364 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 365 | EVP_DigestUpdate(&ctx, ssl->session->master_key, |
| 366 | ssl->session->master_key_length); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 367 | EVP_DigestUpdate(&ctx, ssl3_pad_1, npad); |
| 368 | EVP_DigestFinal_ex(&ctx, md_buf, &i); |
| 369 | |
| 370 | if (!EVP_DigestInit_ex(&ctx, EVP_MD_CTX_md(&ctx), NULL)) { |
| 371 | EVP_MD_CTX_cleanup(&ctx); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 372 | OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 373 | return 0; |
| 374 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame^] | 375 | EVP_DigestUpdate(&ctx, ssl->session->master_key, |
| 376 | ssl->session->master_key_length); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 377 | EVP_DigestUpdate(&ctx, ssl3_pad_2, npad); |
| 378 | EVP_DigestUpdate(&ctx, md_buf, i); |
| 379 | EVP_DigestFinal_ex(&ctx, p, &ret); |
| 380 | |
| 381 | EVP_MD_CTX_cleanup(&ctx); |
| 382 | |
| 383 | return ret; |
| 384 | } |
| 385 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 386 | int ssl3_record_sequence_update(uint8_t *seq, size_t seq_len) { |
| 387 | size_t i; |
| 388 | for (i = seq_len - 1; i < seq_len; i--) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 389 | ++seq[i]; |
| 390 | if (seq[i] != 0) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 391 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 392 | } |
| 393 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 394 | OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 395 | return 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | int ssl3_alert_code(int code) { |
| 399 | switch (code) { |
| 400 | case SSL_AD_CLOSE_NOTIFY: |
| 401 | return SSL3_AD_CLOSE_NOTIFY; |
| 402 | |
| 403 | case SSL_AD_UNEXPECTED_MESSAGE: |
| 404 | return SSL3_AD_UNEXPECTED_MESSAGE; |
| 405 | |
| 406 | case SSL_AD_BAD_RECORD_MAC: |
| 407 | return SSL3_AD_BAD_RECORD_MAC; |
| 408 | |
| 409 | case SSL_AD_DECRYPTION_FAILED: |
| 410 | return SSL3_AD_BAD_RECORD_MAC; |
| 411 | |
| 412 | case SSL_AD_RECORD_OVERFLOW: |
| 413 | return SSL3_AD_BAD_RECORD_MAC; |
| 414 | |
| 415 | case SSL_AD_DECOMPRESSION_FAILURE: |
| 416 | return SSL3_AD_DECOMPRESSION_FAILURE; |
| 417 | |
| 418 | case SSL_AD_HANDSHAKE_FAILURE: |
| 419 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 420 | |
| 421 | case SSL_AD_NO_CERTIFICATE: |
| 422 | return SSL3_AD_NO_CERTIFICATE; |
| 423 | |
| 424 | case SSL_AD_BAD_CERTIFICATE: |
| 425 | return SSL3_AD_BAD_CERTIFICATE; |
| 426 | |
| 427 | case SSL_AD_UNSUPPORTED_CERTIFICATE: |
| 428 | return SSL3_AD_UNSUPPORTED_CERTIFICATE; |
| 429 | |
| 430 | case SSL_AD_CERTIFICATE_REVOKED: |
| 431 | return SSL3_AD_CERTIFICATE_REVOKED; |
| 432 | |
| 433 | case SSL_AD_CERTIFICATE_EXPIRED: |
| 434 | return SSL3_AD_CERTIFICATE_EXPIRED; |
| 435 | |
| 436 | case SSL_AD_CERTIFICATE_UNKNOWN: |
| 437 | return SSL3_AD_CERTIFICATE_UNKNOWN; |
| 438 | |
| 439 | case SSL_AD_ILLEGAL_PARAMETER: |
| 440 | return SSL3_AD_ILLEGAL_PARAMETER; |
| 441 | |
| 442 | case SSL_AD_UNKNOWN_CA: |
| 443 | return SSL3_AD_BAD_CERTIFICATE; |
| 444 | |
| 445 | case SSL_AD_ACCESS_DENIED: |
| 446 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 447 | |
| 448 | case SSL_AD_DECODE_ERROR: |
| 449 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 450 | |
| 451 | case SSL_AD_DECRYPT_ERROR: |
| 452 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 453 | |
| 454 | case SSL_AD_EXPORT_RESTRICTION: |
| 455 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 456 | |
| 457 | case SSL_AD_PROTOCOL_VERSION: |
| 458 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 459 | |
| 460 | case SSL_AD_INSUFFICIENT_SECURITY: |
| 461 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 462 | |
| 463 | case SSL_AD_INTERNAL_ERROR: |
| 464 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 465 | |
| 466 | case SSL_AD_USER_CANCELLED: |
| 467 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 468 | |
| 469 | case SSL_AD_NO_RENEGOTIATION: |
| 470 | return -1; /* Don't send it. */ |
| 471 | |
| 472 | case SSL_AD_UNSUPPORTED_EXTENSION: |
| 473 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 474 | |
| 475 | case SSL_AD_CERTIFICATE_UNOBTAINABLE: |
| 476 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 477 | |
| 478 | case SSL_AD_UNRECOGNIZED_NAME: |
| 479 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 480 | |
| 481 | case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: |
| 482 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 483 | |
| 484 | case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: |
| 485 | return SSL3_AD_HANDSHAKE_FAILURE; |
| 486 | |
| 487 | case SSL_AD_UNKNOWN_PSK_IDENTITY: |
| 488 | return TLS1_AD_UNKNOWN_PSK_IDENTITY; |
| 489 | |
| 490 | case SSL_AD_INAPPROPRIATE_FALLBACK: |
| 491 | return SSL3_AD_INAPPROPRIATE_FALLBACK; |
| 492 | |
| 493 | default: |
| 494 | return -1; |
| 495 | } |
| 496 | } |