Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* DTLS implementation written by Nagendra Modadugu |
| 2 | * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. */ |
| 3 | /* ==================================================================== |
| 4 | * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in |
| 15 | * the documentation and/or other materials provided with the |
| 16 | * distribution. |
| 17 | * |
| 18 | * 3. All advertising materials mentioning features or use of this |
| 19 | * software must display the following acknowledgment: |
| 20 | * "This product includes software developed by the OpenSSL Project |
| 21 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 22 | * |
| 23 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 24 | * endorse or promote products derived from this software without |
| 25 | * prior written permission. For written permission, please contact |
| 26 | * openssl-core@openssl.org. |
| 27 | * |
| 28 | * 5. Products derived from this software may not be called "OpenSSL" |
| 29 | * nor may "OpenSSL" appear in their names without prior written |
| 30 | * permission of the OpenSSL Project. |
| 31 | * |
| 32 | * 6. Redistributions of any form whatsoever must retain the following |
| 33 | * acknowledgment: |
| 34 | * "This product includes software developed by the OpenSSL Project |
| 35 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 36 | * |
| 37 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 38 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 39 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 40 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 41 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 42 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 43 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 44 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 45 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 46 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 47 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 48 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 49 | * ==================================================================== |
| 50 | * |
| 51 | * This product includes cryptographic software written by Eric Young |
| 52 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 53 | * Hudson (tjh@cryptsoft.com). |
| 54 | * |
| 55 | */ |
| 56 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 57 | * All rights reserved. |
| 58 | * |
| 59 | * This package is an SSL implementation written |
| 60 | * by Eric Young (eay@cryptsoft.com). |
| 61 | * The implementation was written so as to conform with Netscapes SSL. |
| 62 | * |
| 63 | * This library is free for commercial and non-commercial use as long as |
| 64 | * the following conditions are aheared to. The following conditions |
| 65 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 66 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 67 | * included with this distribution is covered by the same copyright terms |
| 68 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 69 | * |
| 70 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 71 | * the code are not to be removed. |
| 72 | * If this package is used in a product, Eric Young should be given attribution |
| 73 | * as the author of the parts of the library used. |
| 74 | * This can be in the form of a textual message at program startup or |
| 75 | * in documentation (online or textual) provided with the package. |
| 76 | * |
| 77 | * Redistribution and use in source and binary forms, with or without |
| 78 | * modification, are permitted provided that the following conditions |
| 79 | * are met: |
| 80 | * 1. Redistributions of source code must retain the copyright |
| 81 | * notice, this list of conditions and the following disclaimer. |
| 82 | * 2. Redistributions in binary form must reproduce the above copyright |
| 83 | * notice, this list of conditions and the following disclaimer in the |
| 84 | * documentation and/or other materials provided with the distribution. |
| 85 | * 3. All advertising materials mentioning features or use of this software |
| 86 | * must display the following acknowledgement: |
| 87 | * "This product includes cryptographic software written by |
| 88 | * Eric Young (eay@cryptsoft.com)" |
| 89 | * The word 'cryptographic' can be left out if the rouines from the library |
| 90 | * being used are not cryptographic related :-). |
| 91 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 92 | * the apps directory (application code) you must include an acknowledgement: |
| 93 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 94 | * |
| 95 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 96 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 97 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 98 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 99 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 100 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 101 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 102 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 103 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 104 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 105 | * SUCH DAMAGE. |
| 106 | * |
| 107 | * The licence and distribution terms for any publically available version or |
| 108 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 109 | * copied and put under another distribution licence |
| 110 | * [including the GNU Public Licence.] */ |
| 111 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 112 | #include <openssl/ssl.h> |
| 113 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 114 | #include <assert.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 115 | #include <string.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 116 | |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 117 | #include <openssl/bio.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 118 | #include <openssl/buf.h> |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 119 | #include <openssl/bytestring.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 120 | #include <openssl/mem.h> |
| 121 | #include <openssl/evp.h> |
| 122 | #include <openssl/err.h> |
| 123 | #include <openssl/rand.h> |
| 124 | |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 125 | #include "../crypto/internal.h" |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 126 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 127 | |
| 128 | |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 129 | namespace bssl { |
| 130 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 131 | ssl_open_record_t dtls1_open_app_data(SSL *ssl, Span<uint8_t> *out, |
| 132 | size_t *out_consumed, uint8_t *out_alert, |
| 133 | Span<uint8_t> in) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 134 | assert(!SSL_in_init(ssl)); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 135 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 136 | uint8_t type; |
| 137 | Span<uint8_t> record; |
| 138 | auto ret = dtls_open_record(ssl, &type, &record, out_consumed, out_alert, in); |
| 139 | if (ret != ssl_open_record_success) { |
| 140 | return ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 141 | } |
| 142 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 143 | if (type == SSL3_RT_HANDSHAKE) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 144 | // Parse the first fragment header to determine if this is a pre-CCS or |
| 145 | // post-CCS handshake record. DTLS resets handshake message numbers on each |
| 146 | // handshake, so renegotiations and retransmissions are ambiguous. |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 147 | CBS cbs, body; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 148 | struct hm_header_st msg_hdr; |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 149 | CBS_init(&cbs, record.data(), record.size()); |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 150 | if (!dtls1_parse_fragment(&cbs, &msg_hdr, &body)) { |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 151 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_HANDSHAKE_RECORD); |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 152 | *out_alert = SSL_AD_DECODE_ERROR; |
| 153 | return ssl_open_record_error; |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 154 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 155 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 156 | if (msg_hdr.type == SSL3_MT_FINISHED && |
| 157 | msg_hdr.seq == ssl->d1->handshake_read_seq - 1) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 158 | if (msg_hdr.frag_off == 0) { |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 159 | // Retransmit our last flight of messages. If the peer sends the second |
| 160 | // Finished, they may not have received ours. Only do this for the |
| 161 | // first fragment, in case the Finished was fragmented. |
Robert Sloan | fe7cd21 | 2017-08-07 09:03:39 -0700 | [diff] [blame] | 162 | if (!dtls1_check_timeout_num(ssl)) { |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 163 | *out_alert = 0; // TODO(davidben): Send an alert? |
| 164 | return ssl_open_record_error; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 165 | } |
| 166 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 167 | dtls1_retransmit_outgoing_messages(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 168 | } |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 169 | return ssl_open_record_discard; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 170 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 171 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 172 | // Otherwise, this is a pre-CCS handshake message from an unsupported |
| 173 | // renegotiation attempt. Fall through to the error path. |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 174 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 175 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 176 | if (type != SSL3_RT_APPLICATION_DATA) { |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 177 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_RECORD); |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 178 | *out_alert = SSL_AD_UNEXPECTED_MESSAGE; |
| 179 | return ssl_open_record_error; |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 180 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 181 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 182 | if (record.empty()) { |
| 183 | return ssl_open_record_discard; |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 184 | } |
| 185 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 186 | *out = record; |
| 187 | return ssl_open_record_success; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 188 | } |
| 189 | |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 190 | int dtls1_write_app_data(SSL *ssl, bool *out_needs_handshake, const uint8_t *in, |
| 191 | int len) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 192 | assert(!SSL_in_init(ssl)); |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 193 | *out_needs_handshake = false; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 194 | |
Robert Sloan | 3627296 | 2017-10-23 10:28:39 -0700 | [diff] [blame] | 195 | if (ssl->s3->write_shutdown != ssl_shutdown_none) { |
| 196 | OPENSSL_PUT_ERROR(SSL, SSL_R_PROTOCOL_IS_SHUTDOWN); |
| 197 | return -1; |
| 198 | } |
| 199 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 200 | if (len > SSL3_RT_MAX_PLAIN_LENGTH) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 201 | OPENSSL_PUT_ERROR(SSL, SSL_R_DTLS_MESSAGE_TOO_BIG); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 202 | return -1; |
| 203 | } |
| 204 | |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 205 | if (len < 0) { |
| 206 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_LENGTH); |
| 207 | return -1; |
| 208 | } |
| 209 | |
| 210 | if (len == 0) { |
| 211 | return 0; |
| 212 | } |
| 213 | |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 214 | int ret = dtls1_write_record(ssl, SSL3_RT_APPLICATION_DATA, in, (size_t)len, |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 215 | dtls1_use_current_epoch); |
| 216 | if (ret <= 0) { |
| 217 | return ret; |
| 218 | } |
| 219 | return len; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 220 | } |
| 221 | |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 222 | int dtls1_write_record(SSL *ssl, int type, const uint8_t *in, size_t len, |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 223 | enum dtls1_use_epoch_t use_epoch) { |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 224 | SSLBuffer *buf = &ssl->s3->write_buffer; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 225 | assert(len <= SSL3_RT_MAX_PLAIN_LENGTH); |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 226 | // There should never be a pending write buffer in DTLS. One can't write half |
| 227 | // a datagram, so the write buffer is always dropped in |
| 228 | // |ssl_write_buffer_flush|. |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 229 | assert(buf->empty()); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 230 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 231 | if (len > SSL3_RT_MAX_PLAIN_LENGTH) { |
| 232 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 233 | return -1; |
| 234 | } |
| 235 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 236 | size_t ciphertext_len; |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 237 | if (!buf->EnsureCap(ssl_seal_align_prefix_len(ssl), |
| 238 | len + SSL_max_seal_overhead(ssl)) || |
| 239 | !dtls_seal_record(ssl, buf->remaining().data(), &ciphertext_len, |
| 240 | buf->remaining().size(), type, in, len, use_epoch)) { |
| 241 | buf->Clear(); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 242 | return -1; |
| 243 | } |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 244 | buf->DidWrite(ciphertext_len); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 245 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 246 | int ret = ssl_write_buffer_flush(ssl); |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 247 | if (ret <= 0) { |
| 248 | return ret; |
| 249 | } |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 250 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 251 | } |
| 252 | |
Adam Langley | 4139edb | 2016-01-13 15:00:54 -0800 | [diff] [blame] | 253 | int dtls1_dispatch_alert(SSL *ssl) { |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 254 | int ret = dtls1_write_record(ssl, SSL3_RT_ALERT, &ssl->s3->send_alert[0], 2, |
| 255 | dtls1_use_current_epoch); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 256 | if (ret <= 0) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 257 | return ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 258 | } |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 259 | ssl->s3->alert_dispatch = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 260 | |
Robert Sloan | a27a6a4 | 2017-09-05 08:39:28 -0700 | [diff] [blame] | 261 | // If the alert is fatal, flush the BIO now. |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 262 | if (ssl->s3->send_alert[0] == SSL3_AL_FATAL) { |
Adam Vartanian | bfcf3a7 | 2018-08-10 14:55:24 +0100 | [diff] [blame^] | 263 | BIO_flush(ssl->wbio.get()); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 264 | } |
| 265 | |
Robert Sloan | 921ef2c | 2017-10-17 09:02:20 -0700 | [diff] [blame] | 266 | ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_ALERT, ssl->s3->send_alert); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 267 | |
David Benjamin | 6e899c7 | 2016-06-09 18:02:18 -0400 | [diff] [blame] | 268 | int alert = (ssl->s3->send_alert[0] << 8) | ssl->s3->send_alert[1]; |
| 269 | ssl_do_info_callback(ssl, SSL_CB_WRITE_ALERT, alert); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 270 | |
| 271 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 272 | } |
Robert Sloan | b6d070c | 2017-07-24 08:40:01 -0700 | [diff] [blame] | 273 | |
| 274 | } // namespace bssl |