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> |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 120 | #include <openssl/bytestring.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 121 | #include <openssl/err.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 122 | #include <openssl/evp.h> |
| 123 | #include <openssl/mem.h> |
| 124 | #include <openssl/md5.h> |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 125 | #include <openssl/nid.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 126 | #include <openssl/rand.h> |
| 127 | #include <openssl/sha.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 128 | |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 129 | #include "../crypto/internal.h" |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 130 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 131 | |
| 132 | |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 133 | namespace bssl { |
| 134 | |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 135 | static int add_record_to_flight(SSL *ssl, uint8_t type, |
| 136 | Span<const uint8_t> in) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 137 | // We'll never add a flight while in the process of writing it out. |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 138 | assert(ssl->s3->pending_flight_offset == 0); |
| 139 | |
| 140 | if (ssl->s3->pending_flight == NULL) { |
| 141 | ssl->s3->pending_flight = BUF_MEM_new(); |
| 142 | if (ssl->s3->pending_flight == NULL) { |
| 143 | return 0; |
| 144 | } |
| 145 | } |
| 146 | |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 147 | size_t max_out = in.size() + SSL_max_seal_overhead(ssl); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 148 | size_t new_cap = ssl->s3->pending_flight->length + max_out; |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 149 | if (max_out < in.size() || new_cap < max_out) { |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 150 | OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | size_t len; |
| 155 | if (!BUF_MEM_reserve(ssl->s3->pending_flight, new_cap) || |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 156 | !tls_seal_record(ssl, |
| 157 | (uint8_t *)ssl->s3->pending_flight->data + |
| 158 | ssl->s3->pending_flight->length, |
| 159 | &len, max_out, type, in.data(), in.size())) { |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | ssl->s3->pending_flight->length += len; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 164 | return 1; |
| 165 | } |
| 166 | |
| 167 | int ssl3_init_message(SSL *ssl, CBB *cbb, CBB *body, uint8_t type) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 168 | // Pick a modest size hint to save most of the |realloc| calls. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 169 | if (!CBB_init(cbb, 64) || |
| 170 | !CBB_add_u8(cbb, type) || |
| 171 | !CBB_add_u24_length_prefixed(cbb, body)) { |
| 172 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 173 | CBB_cleanup(cbb); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | return 1; |
| 178 | } |
| 179 | |
Robert Sloan | 4562e9d | 2017-10-02 10:26:51 -0700 | [diff] [blame] | 180 | int ssl3_finish_message(SSL *ssl, CBB *cbb, Array<uint8_t> *out_msg) { |
| 181 | return CBBFinishArray(cbb, out_msg); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 182 | } |
| 183 | |
Robert Sloan | 4562e9d | 2017-10-02 10:26:51 -0700 | [diff] [blame] | 184 | int ssl3_add_message(SSL *ssl, Array<uint8_t> msg) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 185 | // Add the message to the current flight, splitting into several records if |
| 186 | // needed. |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 187 | Span<const uint8_t> rest = msg; |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 188 | do { |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 189 | Span<const uint8_t> chunk = rest.subspan(0, ssl->max_send_fragment); |
| 190 | rest = rest.subspan(chunk.size()); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 191 | |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 192 | if (!add_record_to_flight(ssl, SSL3_RT_HANDSHAKE, chunk)) { |
Robert Sloan | 4562e9d | 2017-10-02 10:26:51 -0700 | [diff] [blame] | 193 | return 0; |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 194 | } |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 195 | } while (!rest.empty()); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 196 | |
Robert Sloan | 4562e9d | 2017-10-02 10:26:51 -0700 | [diff] [blame] | 197 | ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_HANDSHAKE, msg.data(), |
| 198 | msg.size()); |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 199 | // TODO(svaldez): Move this up a layer to fix abstraction for SSLTranscript on |
| 200 | // hs. |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 201 | if (ssl->s3->hs != NULL && |
Robert Sloan | 4562e9d | 2017-10-02 10:26:51 -0700 | [diff] [blame] | 202 | !ssl->s3->hs->transcript.Update(msg.data(), msg.size())) { |
| 203 | return 0; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 204 | } |
Robert Sloan | 4562e9d | 2017-10-02 10:26:51 -0700 | [diff] [blame] | 205 | return 1; |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | int ssl3_add_change_cipher_spec(SSL *ssl) { |
| 209 | static const uint8_t kChangeCipherSpec[1] = {SSL3_MT_CCS}; |
| 210 | |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 211 | if (!add_record_to_flight(ssl, SSL3_RT_CHANGE_CIPHER_SPEC, |
| 212 | kChangeCipherSpec)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 213 | return 0; |
| 214 | } |
| 215 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 216 | ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_CHANGE_CIPHER_SPEC, |
| 217 | kChangeCipherSpec, sizeof(kChangeCipherSpec)); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 218 | return 1; |
| 219 | } |
| 220 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 221 | int ssl3_add_alert(SSL *ssl, uint8_t level, uint8_t desc) { |
| 222 | uint8_t alert[2] = {level, desc}; |
Robert Sloan | ae1abf9 | 2017-10-05 12:50:08 -0700 | [diff] [blame^] | 223 | if (!add_record_to_flight(ssl, SSL3_RT_ALERT, alert)) { |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_ALERT, alert, sizeof(alert)); |
| 228 | ssl_do_info_callback(ssl, SSL_CB_WRITE_ALERT, ((int)level << 8) | desc); |
| 229 | return 1; |
| 230 | } |
| 231 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 232 | int ssl3_flush_flight(SSL *ssl) { |
| 233 | if (ssl->s3->pending_flight == NULL) { |
| 234 | return 1; |
| 235 | } |
| 236 | |
| 237 | if (ssl->s3->pending_flight->length > 0xffffffff || |
| 238 | ssl->s3->pending_flight->length > INT_MAX) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 239 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 240 | return -1; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 241 | } |
| 242 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 243 | // If there is pending data in the write buffer, it must be flushed out before |
| 244 | // any new data in pending_flight. |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 245 | if (ssl_write_buffer_is_pending(ssl)) { |
Robert Sloan | e56da3e | 2017-06-26 08:26:42 -0700 | [diff] [blame] | 246 | int ret = ssl_write_buffer_flush(ssl); |
| 247 | if (ret <= 0) { |
| 248 | ssl->rwstate = SSL_WRITING; |
| 249 | return ret; |
| 250 | } |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 251 | } |
| 252 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 253 | // Write the pending flight. |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 254 | while (ssl->s3->pending_flight_offset < ssl->s3->pending_flight->length) { |
| 255 | int ret = BIO_write( |
| 256 | ssl->wbio, |
| 257 | ssl->s3->pending_flight->data + ssl->s3->pending_flight_offset, |
| 258 | ssl->s3->pending_flight->length - ssl->s3->pending_flight_offset); |
| 259 | if (ret <= 0) { |
| 260 | ssl->rwstate = SSL_WRITING; |
| 261 | return ret; |
| 262 | } |
| 263 | |
| 264 | ssl->s3->pending_flight_offset += ret; |
| 265 | } |
| 266 | |
| 267 | if (BIO_flush(ssl->wbio) <= 0) { |
| 268 | ssl->rwstate = SSL_WRITING; |
| 269 | return -1; |
| 270 | } |
| 271 | |
| 272 | BUF_MEM_free(ssl->s3->pending_flight); |
| 273 | ssl->s3->pending_flight = NULL; |
| 274 | ssl->s3->pending_flight_offset = 0; |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 275 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 276 | } |
| 277 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 278 | int ssl3_send_finished(SSL_HANDSHAKE *hs) { |
David Benjamin | 1b24967 | 2016-12-06 18:25:50 -0500 | [diff] [blame] | 279 | SSL *const ssl = hs->ssl; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 280 | const SSL_SESSION *session = SSL_get_session(ssl); |
| 281 | |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 282 | uint8_t finished[EVP_MAX_MD_SIZE]; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 283 | size_t finished_len; |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 284 | if (!hs->transcript.GetFinishedMAC(finished, &finished_len, session, |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 285 | ssl->server)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 286 | return 0; |
| 287 | } |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 288 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 289 | // Log the master secret, if logging is enabled. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 290 | if (!ssl_log_secret(ssl, "CLIENT_RANDOM", |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 291 | session->master_key, |
| 292 | session->master_key_length)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 293 | return 0; |
| 294 | } |
| 295 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 296 | // Copy the Finished so we can use it for renegotiation checks. |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 297 | if (ssl->version != SSL3_VERSION) { |
| 298 | if (finished_len > sizeof(ssl->s3->previous_client_finished) || |
| 299 | finished_len > sizeof(ssl->s3->previous_server_finished)) { |
| 300 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 301 | return 0; |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | if (ssl->server) { |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 305 | OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len); |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 306 | ssl->s3->previous_server_finished_len = finished_len; |
| 307 | } else { |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 308 | OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len); |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 309 | ssl->s3->previous_client_finished_len = finished_len; |
| 310 | } |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 311 | } |
| 312 | |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 313 | ScopedCBB cbb; |
| 314 | CBB body; |
| 315 | if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_FINISHED) || |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 316 | !CBB_add_bytes(&body, finished, finished_len) || |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 317 | !ssl_add_message_cbb(ssl, cbb.get())) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 318 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 319 | return 0; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 320 | } |
| 321 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 322 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 323 | } |
| 324 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 325 | int ssl3_output_cert_chain(SSL *ssl) { |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 326 | ScopedCBB cbb; |
| 327 | CBB body; |
| 328 | if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_CERTIFICATE) || |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 329 | !ssl_add_cert_chain(ssl, &body) || |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 330 | !ssl_add_message_cbb(ssl, cbb.get())) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 331 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 332 | return 0; |
| 333 | } |
| 334 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 335 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 336 | } |
| 337 | |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 338 | static int extend_handshake_buffer(SSL *ssl, size_t length) { |
| 339 | if (!BUF_MEM_reserve(ssl->init_buf, length)) { |
| 340 | return -1; |
| 341 | } |
| 342 | while (ssl->init_buf->length < length) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 343 | int ret = ssl3_read_handshake_bytes( |
| 344 | ssl, (uint8_t *)ssl->init_buf->data + ssl->init_buf->length, |
| 345 | length - ssl->init_buf->length); |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 346 | if (ret <= 0) { |
| 347 | return ret; |
| 348 | } |
| 349 | ssl->init_buf->length += (size_t)ret; |
| 350 | } |
| 351 | return 1; |
| 352 | } |
| 353 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 354 | static int read_v2_client_hello(SSL *ssl) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 355 | // Read the first 5 bytes, the size of the TLS record header. This is |
| 356 | // sufficient to detect a V2ClientHello and ensures that we never read beyond |
| 357 | // the first record. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 358 | int ret = ssl_read_buffer_extend_to(ssl, SSL3_RT_HEADER_LENGTH); |
| 359 | if (ret <= 0) { |
| 360 | return ret; |
| 361 | } |
| 362 | const uint8_t *p = ssl_read_buffer(ssl); |
| 363 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 364 | // Some dedicated error codes for protocol mixups should the application wish |
| 365 | // to interpret them differently. (These do not overlap with ClientHello or |
| 366 | // V2ClientHello.) |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 367 | if (strncmp("GET ", (const char *)p, 4) == 0 || |
| 368 | strncmp("POST ", (const char *)p, 5) == 0 || |
| 369 | strncmp("HEAD ", (const char *)p, 5) == 0 || |
| 370 | strncmp("PUT ", (const char *)p, 4) == 0) { |
| 371 | OPENSSL_PUT_ERROR(SSL, SSL_R_HTTP_REQUEST); |
| 372 | return -1; |
| 373 | } |
| 374 | if (strncmp("CONNE", (const char *)p, 5) == 0) { |
| 375 | OPENSSL_PUT_ERROR(SSL, SSL_R_HTTPS_PROXY_REQUEST); |
| 376 | return -1; |
| 377 | } |
| 378 | |
| 379 | if ((p[0] & 0x80) == 0 || p[2] != SSL2_MT_CLIENT_HELLO || |
| 380 | p[3] != SSL3_VERSION_MAJOR) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 381 | // Not a V2ClientHello. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 382 | return 1; |
| 383 | } |
| 384 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 385 | // Determine the length of the V2ClientHello. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 386 | size_t msg_length = ((p[0] & 0x7f) << 8) | p[1]; |
| 387 | if (msg_length > (1024 * 4)) { |
| 388 | OPENSSL_PUT_ERROR(SSL, SSL_R_RECORD_TOO_LARGE); |
| 389 | return -1; |
| 390 | } |
| 391 | if (msg_length < SSL3_RT_HEADER_LENGTH - 2) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 392 | // Reject lengths that are too short early. We have already read |
| 393 | // |SSL3_RT_HEADER_LENGTH| bytes, so we should not attempt to process an |
| 394 | // (invalid) V2ClientHello which would be shorter than that. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 395 | OPENSSL_PUT_ERROR(SSL, SSL_R_RECORD_LENGTH_MISMATCH); |
| 396 | return -1; |
| 397 | } |
| 398 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 399 | // Read the remainder of the V2ClientHello. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 400 | ret = ssl_read_buffer_extend_to(ssl, 2 + msg_length); |
| 401 | if (ret <= 0) { |
| 402 | return ret; |
| 403 | } |
| 404 | |
| 405 | CBS v2_client_hello; |
| 406 | CBS_init(&v2_client_hello, ssl_read_buffer(ssl) + 2, msg_length); |
| 407 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 408 | // The V2ClientHello without the length is incorporated into the handshake |
| 409 | // hash. This is only ever called at the start of the handshake, so hs is |
| 410 | // guaranteed to be non-NULL. |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 411 | if (!ssl->s3->hs->transcript.Update(CBS_data(&v2_client_hello), |
| 412 | CBS_len(&v2_client_hello))) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 413 | return -1; |
| 414 | } |
| 415 | |
David Benjamin | 7c0d06c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 416 | ssl_do_msg_callback(ssl, 0 /* read */, 0 /* V2ClientHello */, |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 417 | CBS_data(&v2_client_hello), CBS_len(&v2_client_hello)); |
| 418 | |
| 419 | uint8_t msg_type; |
| 420 | uint16_t version, cipher_spec_length, session_id_length, challenge_length; |
| 421 | CBS cipher_specs, session_id, challenge; |
| 422 | if (!CBS_get_u8(&v2_client_hello, &msg_type) || |
| 423 | !CBS_get_u16(&v2_client_hello, &version) || |
| 424 | !CBS_get_u16(&v2_client_hello, &cipher_spec_length) || |
| 425 | !CBS_get_u16(&v2_client_hello, &session_id_length) || |
| 426 | !CBS_get_u16(&v2_client_hello, &challenge_length) || |
| 427 | !CBS_get_bytes(&v2_client_hello, &cipher_specs, cipher_spec_length) || |
| 428 | !CBS_get_bytes(&v2_client_hello, &session_id, session_id_length) || |
| 429 | !CBS_get_bytes(&v2_client_hello, &challenge, challenge_length) || |
| 430 | CBS_len(&v2_client_hello) != 0) { |
| 431 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| 432 | return -1; |
| 433 | } |
| 434 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 435 | // msg_type has already been checked. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 436 | assert(msg_type == SSL2_MT_CLIENT_HELLO); |
| 437 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 438 | // The client_random is the V2ClientHello challenge. Truncate or left-pad with |
| 439 | // zeros as needed. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 440 | size_t rand_len = CBS_len(&challenge); |
| 441 | if (rand_len > SSL3_RANDOM_SIZE) { |
| 442 | rand_len = SSL3_RANDOM_SIZE; |
| 443 | } |
| 444 | uint8_t random[SSL3_RANDOM_SIZE]; |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 445 | OPENSSL_memset(random, 0, SSL3_RANDOM_SIZE); |
| 446 | OPENSSL_memcpy(random + (SSL3_RANDOM_SIZE - rand_len), CBS_data(&challenge), |
| 447 | rand_len); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 448 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 449 | // Write out an equivalent SSLv3 ClientHello. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 450 | size_t max_v3_client_hello = SSL3_HM_HEADER_LENGTH + 2 /* version */ + |
| 451 | SSL3_RANDOM_SIZE + 1 /* session ID length */ + |
| 452 | 2 /* cipher list length */ + |
| 453 | CBS_len(&cipher_specs) / 3 * 2 + |
| 454 | 1 /* compression length */ + 1 /* compression */; |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 455 | ScopedCBB client_hello; |
| 456 | CBB hello_body, cipher_suites; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 457 | if (!BUF_MEM_reserve(ssl->init_buf, max_v3_client_hello) || |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 458 | !CBB_init_fixed(client_hello.get(), (uint8_t *)ssl->init_buf->data, |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 459 | ssl->init_buf->max) || |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 460 | !CBB_add_u8(client_hello.get(), SSL3_MT_CLIENT_HELLO) || |
| 461 | !CBB_add_u24_length_prefixed(client_hello.get(), &hello_body) || |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 462 | !CBB_add_u16(&hello_body, version) || |
| 463 | !CBB_add_bytes(&hello_body, random, SSL3_RANDOM_SIZE) || |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 464 | // No session id. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 465 | !CBB_add_u8(&hello_body, 0) || |
| 466 | !CBB_add_u16_length_prefixed(&hello_body, &cipher_suites)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 467 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| 468 | return -1; |
| 469 | } |
| 470 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 471 | // Copy the cipher suites. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 472 | while (CBS_len(&cipher_specs) > 0) { |
| 473 | uint32_t cipher_spec; |
| 474 | if (!CBS_get_u24(&cipher_specs, &cipher_spec)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 475 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| 476 | return -1; |
| 477 | } |
| 478 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 479 | // Skip SSLv2 ciphers. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 480 | if ((cipher_spec & 0xff0000) != 0) { |
| 481 | continue; |
| 482 | } |
| 483 | if (!CBB_add_u16(&cipher_suites, cipher_spec)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 484 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 485 | return -1; |
| 486 | } |
| 487 | } |
| 488 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 489 | // Add the null compression scheme and finish. |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 490 | if (!CBB_add_u8(&hello_body, 1) || |
| 491 | !CBB_add_u8(&hello_body, 0) || |
| 492 | !CBB_finish(client_hello.get(), NULL, &ssl->init_buf->length)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 493 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 494 | return -1; |
| 495 | } |
| 496 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 497 | // Consume and discard the V2ClientHello. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 498 | ssl_read_buffer_consume(ssl, 2 + msg_length); |
| 499 | ssl_read_buffer_discard(ssl); |
| 500 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 501 | ssl->s3->is_v2_hello = true; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 502 | return 1; |
| 503 | } |
| 504 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 505 | // TODO(davidben): Remove |out_bytes_needed| and inline into |ssl3_get_message| |
| 506 | // when the entire record is copied into |init_buf|. |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 507 | static bool parse_message(SSL *ssl, SSLMessage *out, size_t *out_bytes_needed) { |
| 508 | if (ssl->init_buf == NULL) { |
| 509 | *out_bytes_needed = 4; |
| 510 | return false; |
| 511 | } |
| 512 | |
| 513 | CBS cbs; |
| 514 | uint32_t len; |
| 515 | CBS_init(&cbs, reinterpret_cast<const uint8_t *>(ssl->init_buf->data), |
| 516 | ssl->init_buf->length); |
| 517 | if (!CBS_get_u8(&cbs, &out->type) || |
| 518 | !CBS_get_u24(&cbs, &len)) { |
| 519 | *out_bytes_needed = 4; |
| 520 | return false; |
| 521 | } |
| 522 | |
| 523 | if (!CBS_get_bytes(&cbs, &out->body, len)) { |
| 524 | *out_bytes_needed = 4 + len; |
| 525 | return false; |
| 526 | } |
| 527 | |
| 528 | CBS_init(&out->raw, reinterpret_cast<const uint8_t *>(ssl->init_buf->data), |
| 529 | 4 + len); |
| 530 | out->is_v2_hello = ssl->s3->is_v2_hello; |
| 531 | if (!ssl->s3->has_message) { |
| 532 | if (!out->is_v2_hello) { |
| 533 | ssl_do_msg_callback(ssl, 0 /* read */, SSL3_RT_HANDSHAKE, |
| 534 | CBS_data(&out->raw), CBS_len(&out->raw)); |
| 535 | } |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 536 | ssl->s3->has_message = true; |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 537 | } |
| 538 | return true; |
| 539 | } |
| 540 | |
| 541 | bool ssl3_get_message(SSL *ssl, SSLMessage *out) { |
| 542 | size_t unused; |
| 543 | return parse_message(ssl, out, &unused); |
| 544 | } |
| 545 | |
| 546 | int ssl3_read_message(SSL *ssl) { |
| 547 | SSLMessage msg; |
| 548 | size_t bytes_needed; |
| 549 | if (parse_message(ssl, &msg, &bytes_needed)) { |
| 550 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 551 | return -1; |
| 552 | } |
| 553 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 554 | // Enforce the limit so the peer cannot force us to buffer 16MB. |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 555 | if (bytes_needed > 4 + ssl_max_handshake_message_len(ssl)) { |
| 556 | ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| 557 | OPENSSL_PUT_ERROR(SSL, SSL_R_EXCESSIVE_MESSAGE_SIZE); |
| 558 | return -1; |
| 559 | } |
| 560 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 561 | // Re-create the handshake buffer if needed. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 562 | if (ssl->init_buf == NULL) { |
| 563 | ssl->init_buf = BUF_MEM_new(); |
| 564 | if (ssl->init_buf == NULL) { |
| 565 | return -1; |
| 566 | } |
| 567 | } |
| 568 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 569 | // Bypass the record layer for the first message to handle V2ClientHello. |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 570 | if (ssl->server && !ssl->s3->v2_hello_done) { |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 571 | int ret = read_v2_client_hello(ssl); |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 572 | if (ret > 0) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 573 | ssl->s3->v2_hello_done = true; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 574 | } |
David Benjamin | d316cba | 2016-06-02 16:17:39 -0400 | [diff] [blame] | 575 | return ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 576 | } |
| 577 | |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 578 | return extend_handshake_buffer(ssl, bytes_needed); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 579 | } |
| 580 | |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 581 | void ssl3_next_message(SSL *ssl) { |
| 582 | SSLMessage msg; |
| 583 | if (!ssl3_get_message(ssl, &msg) || |
| 584 | ssl->init_buf == NULL || |
| 585 | ssl->init_buf->length < CBS_len(&msg.raw)) { |
| 586 | assert(0); |
| 587 | return; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 588 | } |
| 589 | |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 590 | OPENSSL_memmove(ssl->init_buf->data, ssl->init_buf->data + CBS_len(&msg.raw), |
| 591 | ssl->init_buf->length - CBS_len(&msg.raw)); |
| 592 | ssl->init_buf->length -= CBS_len(&msg.raw); |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 593 | ssl->s3->is_v2_hello = false; |
| 594 | ssl->s3->has_message = false; |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 595 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 596 | // Post-handshake messages are rare, so release the buffer after every |
| 597 | // message. During the handshake, |on_handshake_complete| will release it. |
Robert Sloan | 8437709 | 2017-08-14 09:33:19 -0700 | [diff] [blame] | 598 | if (!SSL_in_init(ssl) && ssl->init_buf->length == 0) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 599 | BUF_MEM_free(ssl->init_buf); |
| 600 | ssl->init_buf = NULL; |
| 601 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 602 | } |
| 603 | |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 604 | } // namespace bssl |