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. |
| 7 | * |
| 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). |
| 14 | * |
| 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. |
| 21 | * |
| 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 :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 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. |
| 51 | * |
| 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) 1998-2002 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 |
| 65 | * notice, this list of conditions and the following disclaimer. |
| 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 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 110 | * ECC cipher suite support in OpenSSL originally developed by |
| 111 | * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ |
| 112 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 113 | #include <openssl/ssl.h> |
| 114 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 115 | #include <assert.h> |
| 116 | #include <limits.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 117 | #include <string.h> |
| 118 | |
| 119 | #include <openssl/buf.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 120 | #include <openssl/err.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 121 | #include <openssl/evp.h> |
| 122 | #include <openssl/mem.h> |
| 123 | #include <openssl/md5.h> |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 124 | #include <openssl/nid.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 125 | #include <openssl/rand.h> |
| 126 | #include <openssl/sha.h> |
| 127 | #include <openssl/x509.h> |
| 128 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 129 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 130 | |
| 131 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 132 | /* ssl3_do_write sends |ssl->init_buf| in records of type 'type' |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 133 | * (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC). It returns -1 on error, 1 |
| 134 | * on success or zero if the transmission is still incomplete. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 135 | int ssl3_do_write(SSL *ssl, int type) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 136 | int n; |
| 137 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 138 | n = ssl3_write_bytes(ssl, type, &ssl->init_buf->data[ssl->init_off], |
| 139 | ssl->init_num); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 140 | if (n < 0) { |
| 141 | return -1; |
| 142 | } |
| 143 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 144 | if (n == ssl->init_num) { |
| 145 | if (ssl->msg_callback) { |
| 146 | ssl->msg_callback(1, ssl->version, type, ssl->init_buf->data, |
| 147 | (size_t)(ssl->init_off + ssl->init_num), ssl, |
| 148 | ssl->msg_callback_arg); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 149 | } |
| 150 | return 1; |
| 151 | } |
| 152 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 153 | ssl->init_off += n; |
| 154 | ssl->init_num -= n; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 155 | return 0; |
| 156 | } |
| 157 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 158 | int ssl3_send_finished(SSL *ssl, int a, int b) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 159 | uint8_t *p; |
| 160 | int n; |
| 161 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 162 | if (ssl->state == a) { |
| 163 | p = ssl_handshake_start(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 164 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 165 | n = ssl->s3->enc_method->final_finish_mac(ssl, ssl->server, |
| 166 | ssl->s3->tmp.finish_md); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 167 | if (n == 0) { |
| 168 | return 0; |
| 169 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 170 | ssl->s3->tmp.finish_md_len = n; |
| 171 | memcpy(p, ssl->s3->tmp.finish_md, n); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 172 | |
| 173 | /* Log the master secret, if logging is enabled. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 174 | if (!ssl_log_master_secret(ssl, ssl->s3->client_random, SSL3_RANDOM_SIZE, |
| 175 | ssl->session->master_key, |
| 176 | ssl->session->master_key_length)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 177 | return 0; |
| 178 | } |
| 179 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 180 | /* Copy the finished so we can use it for renegotiation checks */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 181 | if (ssl->server) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 182 | assert(n <= EVP_MAX_MD_SIZE); |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 183 | memcpy(ssl->s3->previous_server_finished, ssl->s3->tmp.finish_md, n); |
| 184 | ssl->s3->previous_server_finished_len = n; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 185 | } else { |
| 186 | assert(n <= EVP_MAX_MD_SIZE); |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 187 | memcpy(ssl->s3->previous_client_finished, ssl->s3->tmp.finish_md, n); |
| 188 | ssl->s3->previous_client_finished_len = n; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 189 | } |
| 190 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 191 | if (!ssl_set_handshake_header(ssl, SSL3_MT_FINISHED, n)) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 192 | return 0; |
| 193 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 194 | ssl->state = b; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /* SSL3_ST_SEND_xxxxxx_HELLO_B */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 198 | return ssl_do_write(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 199 | } |
| 200 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 201 | /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen |
| 202 | * so far. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 203 | static void ssl3_take_mac(SSL *ssl) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 204 | /* If no new cipher setup then return immediately: other functions will set |
| 205 | * the appropriate error. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 206 | if (ssl->s3->tmp.new_cipher == NULL) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 207 | return; |
| 208 | } |
| 209 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 210 | ssl->s3->tmp.peer_finish_md_len = ssl->s3->enc_method->final_finish_mac( |
| 211 | ssl, !ssl->server, ssl->s3->tmp.peer_finish_md); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 212 | } |
| 213 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 214 | int ssl3_get_finished(SSL *ssl, int a, int b) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 215 | int al, finished_len, ok; |
| 216 | long message_len; |
| 217 | uint8_t *p; |
| 218 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 219 | message_len = ssl->method->ssl_get_message( |
| 220 | ssl, a, b, SSL3_MT_FINISHED, EVP_MAX_MD_SIZE, ssl_dont_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 221 | |
| 222 | if (!ok) { |
| 223 | return message_len; |
| 224 | } |
| 225 | |
| 226 | /* Snapshot the finished hash before incorporating the new message. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 227 | ssl3_take_mac(ssl); |
| 228 | if (!ssl3_hash_current_message(ssl)) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 229 | goto err; |
| 230 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 231 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 232 | p = ssl->init_msg; |
| 233 | finished_len = ssl->s3->tmp.peer_finish_md_len; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 234 | |
| 235 | if (finished_len != message_len) { |
| 236 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 237 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_DIGEST_LENGTH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 238 | goto f_err; |
| 239 | } |
| 240 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 241 | int finished_ret = |
| 242 | CRYPTO_memcmp(p, ssl->s3->tmp.peer_finish_md, finished_len); |
| 243 | #if defined(BORINGSSL_UNSAFE_FUZZER_MODE) |
| 244 | finished_ret = 0; |
| 245 | #endif |
| 246 | if (finished_ret != 0) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 247 | al = SSL_AD_DECRYPT_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 248 | OPENSSL_PUT_ERROR(SSL, SSL_R_DIGEST_CHECK_FAILED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 249 | goto f_err; |
| 250 | } |
| 251 | |
| 252 | /* Copy the finished so we can use it for renegotiation checks */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 253 | if (ssl->server) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 254 | assert(finished_len <= EVP_MAX_MD_SIZE); |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 255 | memcpy(ssl->s3->previous_client_finished, ssl->s3->tmp.peer_finish_md, |
| 256 | finished_len); |
| 257 | ssl->s3->previous_client_finished_len = finished_len; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 258 | } else { |
| 259 | assert(finished_len <= EVP_MAX_MD_SIZE); |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 260 | memcpy(ssl->s3->previous_server_finished, ssl->s3->tmp.peer_finish_md, |
| 261 | finished_len); |
| 262 | ssl->s3->previous_server_finished_len = finished_len; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | return 1; |
| 266 | |
| 267 | f_err: |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 268 | ssl3_send_alert(ssl, SSL3_AL_FATAL, al); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 269 | err: |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 270 | return 0; |
| 271 | } |
| 272 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 273 | int ssl3_send_change_cipher_spec(SSL *ssl, int a, int b) { |
| 274 | if (ssl->state == a) { |
| 275 | *((uint8_t *)ssl->init_buf->data) = SSL3_MT_CCS; |
| 276 | ssl->init_num = 1; |
| 277 | ssl->init_off = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 278 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 279 | ssl->state = b; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | /* SSL3_ST_CW_CHANGE_B */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 283 | return ssl3_do_write(ssl, SSL3_RT_CHANGE_CIPHER_SPEC); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 284 | } |
| 285 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 286 | int ssl3_output_cert_chain(SSL *ssl) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 287 | uint8_t *p; |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 288 | unsigned long l = 3 + SSL_HM_HEADER_LENGTH(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 289 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 290 | if (!ssl_add_cert_chain(ssl, &l)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 291 | return 0; |
| 292 | } |
| 293 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 294 | l -= 3 + SSL_HM_HEADER_LENGTH(ssl); |
| 295 | p = ssl_handshake_start(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 296 | l2n3(l, p); |
| 297 | l += 3; |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 298 | return ssl_set_handshake_header(ssl, SSL3_MT_CERTIFICATE, l); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | /* Obtain handshake message of message type |msg_type| (any if |msg_type| == -1), |
| 302 | * maximum acceptable body length |max|. The first four bytes (msg_type and |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 303 | * length) are read in state |header_state|, the body is read in state |
| 304 | * |body_state|. */ |
| 305 | long ssl3_get_message(SSL *ssl, int header_state, int body_state, int msg_type, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 306 | long max, enum ssl_hash_message_t hash_message, int *ok) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 307 | uint8_t *p; |
| 308 | unsigned long l; |
| 309 | long n; |
| 310 | int al; |
| 311 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 312 | if (ssl->s3->tmp.reuse_message) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 313 | /* A ssl_dont_hash_message call cannot be combined with reuse_message; the |
| 314 | * ssl_dont_hash_message would have to have been applied to the previous |
| 315 | * call. */ |
| 316 | assert(hash_message == ssl_hash_message); |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 317 | ssl->s3->tmp.reuse_message = 0; |
| 318 | if (msg_type >= 0 && ssl->s3->tmp.message_type != msg_type) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 319 | al = SSL_AD_UNEXPECTED_MESSAGE; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 320 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 321 | goto f_err; |
| 322 | } |
| 323 | *ok = 1; |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 324 | ssl->state = body_state; |
| 325 | ssl->init_msg = (uint8_t *)ssl->init_buf->data + 4; |
| 326 | ssl->init_num = (int)ssl->s3->tmp.message_size; |
| 327 | return ssl->init_num; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 328 | } |
| 329 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 330 | p = (uint8_t *)ssl->init_buf->data; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 331 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 332 | if (ssl->state == header_state) { |
| 333 | assert(ssl->init_num < 4); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 334 | |
| 335 | for (;;) { |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 336 | while (ssl->init_num < 4) { |
| 337 | int bytes_read = ssl3_read_bytes( |
| 338 | ssl, SSL3_RT_HANDSHAKE, &p[ssl->init_num], 4 - ssl->init_num, 0); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 339 | if (bytes_read <= 0) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 340 | *ok = 0; |
| 341 | return bytes_read; |
| 342 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 343 | ssl->init_num += bytes_read; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | static const uint8_t kHelloRequest[4] = {SSL3_MT_HELLO_REQUEST, 0, 0, 0}; |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 347 | if (ssl->server || memcmp(p, kHelloRequest, sizeof(kHelloRequest)) != 0) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 348 | break; |
| 349 | } |
| 350 | |
| 351 | /* The server may always send 'Hello Request' messages -- we are doing |
| 352 | * a handshake anyway now, so ignore them if their format is correct. |
| 353 | * Does not count for 'Finished' MAC. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 354 | ssl->init_num = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 355 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 356 | if (ssl->msg_callback) { |
| 357 | ssl->msg_callback(0, ssl->version, SSL3_RT_HANDSHAKE, p, 4, ssl, |
| 358 | ssl->msg_callback_arg); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 359 | } |
| 360 | } |
| 361 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 362 | /* ssl->init_num == 4 */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 363 | |
| 364 | if (msg_type >= 0 && *p != msg_type) { |
| 365 | al = SSL_AD_UNEXPECTED_MESSAGE; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 366 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 367 | goto f_err; |
| 368 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 369 | ssl->s3->tmp.message_type = *(p++); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 370 | |
| 371 | n2l3(p, l); |
| 372 | if (l > (unsigned long)max) { |
| 373 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 374 | OPENSSL_PUT_ERROR(SSL, SSL_R_EXCESSIVE_MESSAGE_SIZE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 375 | goto f_err; |
| 376 | } |
| 377 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 378 | if (l && !BUF_MEM_grow_clean(ssl->init_buf, l + 4)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 379 | OPENSSL_PUT_ERROR(SSL, ERR_R_BUF_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 380 | goto err; |
| 381 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 382 | ssl->s3->tmp.message_size = l; |
| 383 | ssl->state = body_state; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 384 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 385 | ssl->init_msg = (uint8_t *)ssl->init_buf->data + 4; |
| 386 | ssl->init_num = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | /* next state (body_state) */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 390 | p = ssl->init_msg; |
| 391 | n = ssl->s3->tmp.message_size - ssl->init_num; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 392 | while (n > 0) { |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 393 | int bytes_read = |
| 394 | ssl3_read_bytes(ssl, SSL3_RT_HANDSHAKE, &p[ssl->init_num], n, 0); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 395 | if (bytes_read <= 0) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 396 | *ok = 0; |
| 397 | return bytes_read; |
| 398 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 399 | ssl->init_num += bytes_read; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 400 | n -= bytes_read; |
| 401 | } |
| 402 | |
| 403 | /* Feed this message into MAC computation. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 404 | if (hash_message == ssl_hash_message && !ssl3_hash_current_message(ssl)) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 405 | goto err; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 406 | } |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 407 | if (ssl->msg_callback) { |
| 408 | ssl->msg_callback(0, ssl->version, SSL3_RT_HANDSHAKE, ssl->init_buf->data, |
| 409 | (size_t)ssl->init_num + 4, ssl, ssl->msg_callback_arg); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 410 | } |
| 411 | *ok = 1; |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 412 | return ssl->init_num; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 413 | |
| 414 | f_err: |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 415 | ssl3_send_alert(ssl, SSL3_AL_FATAL, al); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 416 | |
| 417 | err: |
| 418 | *ok = 0; |
| 419 | return -1; |
| 420 | } |
| 421 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 422 | int ssl3_hash_current_message(SSL *ssl) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 423 | /* The handshake header (different size between DTLS and TLS) is included in |
| 424 | * the hash. */ |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 425 | size_t header_len = ssl->init_msg - (uint8_t *)ssl->init_buf->data; |
| 426 | return ssl3_update_handshake_hash(ssl, (uint8_t *)ssl->init_buf->data, |
| 427 | ssl->init_num + header_len); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | /* ssl3_cert_verify_hash is documented as needing EVP_MAX_MD_SIZE because that |
| 431 | * is sufficient pre-TLS1.2 as well. */ |
| 432 | OPENSSL_COMPILE_ASSERT(EVP_MAX_MD_SIZE > MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, |
| 433 | combined_tls_hash_fits_in_max); |
| 434 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 435 | int ssl3_cert_verify_hash(SSL *ssl, uint8_t *out, size_t *out_len, |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 436 | const EVP_MD **out_md, int pkey_type) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 437 | /* For TLS v1.2 send signature algorithm and signature using |
| 438 | * agreed digest and cached handshake records. Otherwise, use |
| 439 | * SHA1 or MD5 + SHA1 depending on key type. */ |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 440 | if (ssl3_protocol_version(ssl) >= TLS1_2_VERSION) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 441 | EVP_MD_CTX mctx; |
| 442 | unsigned len; |
| 443 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 444 | EVP_MD_CTX_init(&mctx); |
| 445 | if (!EVP_DigestInit_ex(&mctx, *out_md, NULL) || |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 446 | !EVP_DigestUpdate(&mctx, ssl->s3->handshake_buffer->data, |
| 447 | ssl->s3->handshake_buffer->length) || |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 448 | !EVP_DigestFinal(&mctx, out, &len)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 449 | OPENSSL_PUT_ERROR(SSL, ERR_R_EVP_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 450 | EVP_MD_CTX_cleanup(&mctx); |
| 451 | return 0; |
| 452 | } |
| 453 | *out_len = len; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 454 | } else if (pkey_type == EVP_PKEY_RSA) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 455 | if (ssl->s3->enc_method->cert_verify_mac(ssl, NID_md5, out) == 0 || |
| 456 | ssl->s3->enc_method->cert_verify_mac(ssl, NID_sha1, |
| 457 | out + MD5_DIGEST_LENGTH) == 0) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 458 | return 0; |
| 459 | } |
| 460 | *out_len = MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH; |
| 461 | *out_md = EVP_md5_sha1(); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 462 | } else if (pkey_type == EVP_PKEY_EC) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame^] | 463 | if (ssl->s3->enc_method->cert_verify_mac(ssl, NID_sha1, out) == 0) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 464 | return 0; |
| 465 | } |
| 466 | *out_len = SHA_DIGEST_LENGTH; |
| 467 | *out_md = EVP_sha1(); |
| 468 | } else { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 469 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | return 1; |
| 474 | } |
| 475 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 476 | int ssl_verify_alarm_type(long type) { |
| 477 | int al; |
| 478 | |
| 479 | switch (type) { |
| 480 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: |
| 481 | case X509_V_ERR_UNABLE_TO_GET_CRL: |
| 482 | case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: |
| 483 | al = SSL_AD_UNKNOWN_CA; |
| 484 | break; |
| 485 | |
| 486 | case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: |
| 487 | case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: |
| 488 | case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: |
| 489 | case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: |
| 490 | case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: |
| 491 | case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: |
| 492 | case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: |
| 493 | case X509_V_ERR_CERT_NOT_YET_VALID: |
| 494 | case X509_V_ERR_CRL_NOT_YET_VALID: |
| 495 | case X509_V_ERR_CERT_UNTRUSTED: |
| 496 | case X509_V_ERR_CERT_REJECTED: |
| 497 | al = SSL_AD_BAD_CERTIFICATE; |
| 498 | break; |
| 499 | |
| 500 | case X509_V_ERR_CERT_SIGNATURE_FAILURE: |
| 501 | case X509_V_ERR_CRL_SIGNATURE_FAILURE: |
| 502 | al = SSL_AD_DECRYPT_ERROR; |
| 503 | break; |
| 504 | |
| 505 | case X509_V_ERR_CERT_HAS_EXPIRED: |
| 506 | case X509_V_ERR_CRL_HAS_EXPIRED: |
| 507 | al = SSL_AD_CERTIFICATE_EXPIRED; |
| 508 | break; |
| 509 | |
| 510 | case X509_V_ERR_CERT_REVOKED: |
| 511 | al = SSL_AD_CERTIFICATE_REVOKED; |
| 512 | break; |
| 513 | |
| 514 | case X509_V_ERR_OUT_OF_MEM: |
| 515 | al = SSL_AD_INTERNAL_ERROR; |
| 516 | break; |
| 517 | |
| 518 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: |
| 519 | case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: |
| 520 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: |
| 521 | case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: |
| 522 | case X509_V_ERR_CERT_CHAIN_TOO_LONG: |
| 523 | case X509_V_ERR_PATH_LENGTH_EXCEEDED: |
| 524 | case X509_V_ERR_INVALID_CA: |
| 525 | al = SSL_AD_UNKNOWN_CA; |
| 526 | break; |
| 527 | |
| 528 | case X509_V_ERR_APPLICATION_VERIFICATION: |
| 529 | al = SSL_AD_HANDSHAKE_FAILURE; |
| 530 | break; |
| 531 | |
| 532 | case X509_V_ERR_INVALID_PURPOSE: |
| 533 | al = SSL_AD_UNSUPPORTED_CERTIFICATE; |
| 534 | break; |
| 535 | |
| 536 | default: |
| 537 | al = SSL_AD_CERTIFICATE_UNKNOWN; |
| 538 | break; |
| 539 | } |
| 540 | |
| 541 | return al; |
| 542 | } |
| 543 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 544 | int ssl_fill_hello_random(uint8_t *out, size_t len, int is_server) { |
| 545 | if (is_server) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 546 | const uint32_t current_time = time(NULL); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 547 | uint8_t *p = out; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 548 | |
| 549 | if (len < 4) { |
| 550 | return 0; |
| 551 | } |
| 552 | p[0] = current_time >> 24; |
| 553 | p[1] = current_time >> 16; |
| 554 | p[2] = current_time >> 8; |
| 555 | p[3] = current_time; |
| 556 | return RAND_bytes(p + 4, len - 4); |
| 557 | } else { |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 558 | return RAND_bytes(out, len); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 559 | } |
| 560 | } |