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| 1 /* ssl/dtls1.h */ | |
| 2 /* | |
| 3 * DTLS implementation written by Nagendra Modadugu | |
| 4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. | |
| 5 */ | |
| 6 /* ==================================================================== | |
| 7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. | |
| 8 * | |
| 9 * Redistribution and use in source and binary forms, with or without | |
| 10 * modification, are permitted provided that the following conditions | |
| 11 * are met: | |
| 12 * | |
| 13 * 1. Redistributions of source code must retain the above copyright | |
| 14 * notice, this list of conditions and the following disclaimer. | |
| 15 * | |
| 16 * 2. Redistributions in binary form must reproduce the above copyright | |
| 17 * notice, this list of conditions and the following disclaimer in | |
| 18 * the documentation and/or other materials provided with the | |
| 19 * distribution. | |
| 20 * | |
| 21 * 3. All advertising materials mentioning features or use of this | |
| 22 * software must display the following acknowledgment: | |
| 23 * "This product includes software developed by the OpenSSL Project | |
| 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 25 * | |
| 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 27 * endorse or promote products derived from this software without | |
| 28 * prior written permission. For written permission, please contact | |
| 29 * openssl-core@OpenSSL.org. | |
| 30 * | |
| 31 * 5. Products derived from this software may not be called "OpenSSL" | |
| 32 * nor may "OpenSSL" appear in their names without prior written | |
| 33 * permission of the OpenSSL Project. | |
| 34 * | |
| 35 * 6. Redistributions of any form whatsoever must retain the following | |
| 36 * acknowledgment: | |
| 37 * "This product includes software developed by the OpenSSL Project | |
| 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 39 * | |
| 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 51 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 52 * ==================================================================== | |
| 53 * | |
| 54 * This product includes cryptographic software written by Eric Young | |
| 55 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 56 * Hudson (tjh@cryptsoft.com). | |
| 57 * | |
| 58 */ | |
| 59 | |
| 60 #ifndef HEADER_DTLS1_H | |
| 61 #define HEADER_DTLS1_H | |
| 62 | |
| 63 #include <openssl/buffer.h> | |
| 64 #include <openssl/pqueue.h> | |
| 65 #ifdef OPENSSL_SYS_VMS | |
| 66 #include <resource.h> | |
| 67 #include <sys/timeb.h> | |
| 68 #endif | |
| 69 #ifdef OPENSSL_SYS_WIN32 | |
| 70 /* Needed for struct timeval */ | |
| 71 #include <winsock.h> | |
| 72 #elif defined(OPENSSL_SYS_NETWARE) && !defined(_WINSOCK2API_) | |
| 73 #include <sys/timeval.h> | |
| 74 #else | |
| 75 #if defined(OPENSSL_SYS_VXWORKS) | |
| 76 #include <sys/times.h> | |
| 77 #else | |
| 78 #include <sys/time.h> | |
| 79 #endif | |
| 80 #endif | |
| 81 | |
| 82 #ifdef __cplusplus | |
| 83 extern "C" { | |
| 84 #endif | |
| 85 | |
| 86 #define DTLS1_VERSION 0xFEFF | |
| 87 #define DTLS1_BAD_VER 0x0100 | |
| 88 | |
| 89 #if 0 | |
| 90 /* this alert description is not specified anywhere... */ | |
| 91 #define DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 110 | |
| 92 #endif | |
| 93 | |
| 94 /* lengths of messages */ | |
| 95 #define DTLS1_COOKIE_LENGTH 256 | |
| 96 | |
| 97 #define DTLS1_RT_HEADER_LENGTH 13 | |
| 98 | |
| 99 #define DTLS1_HM_HEADER_LENGTH 12 | |
| 100 | |
| 101 #define DTLS1_HM_BAD_FRAGMENT -2 | |
| 102 #define DTLS1_HM_FRAGMENT_RETRY -3 | |
| 103 | |
| 104 #define DTLS1_CCS_HEADER_LENGTH 1 | |
| 105 | |
| 106 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE | |
| 107 #define DTLS1_AL_HEADER_LENGTH 7 | |
| 108 #else | |
| 109 #define DTLS1_AL_HEADER_LENGTH 2 | |
| 110 #endif | |
| 111 | |
| 112 #ifndef OPENSSL_NO_SSL_INTERN | |
| 113 | |
| 114 #ifndef OPENSSL_NO_SCTP | |
| 115 #define DTLS1_SCTP_AUTH_LABEL "EXPORTER_DTLS_OVER_SCTP" | |
| 116 #endif | |
| 117 | |
| 118 typedef struct dtls1_bitmap_st | |
| 119 { | |
| 120 unsigned long map; /* track 32 packets on 32-bit systems | |
| 121 and 64 - on 64-bit systems */ | |
| 122 unsigned char max_seq_num[8]; /* max record number seen so far, | |
| 123 64-bit value in big-endian | |
| 124 encoding */ | |
| 125 } DTLS1_BITMAP; | |
| 126 | |
| 127 struct dtls1_retransmit_state | |
| 128 { | |
| 129 EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */ | |
| 130 EVP_MD_CTX *write_hash; /* used for mac generation */ | |
| 131 #ifndef OPENSSL_NO_COMP | |
| 132 COMP_CTX *compress; /* compression */ | |
| 133 #else | |
| 134 char *compress; | |
| 135 #endif | |
| 136 SSL_SESSION *session; | |
| 137 unsigned short epoch; | |
| 138 }; | |
| 139 | |
| 140 struct hm_header_st | |
| 141 { | |
| 142 unsigned char type; | |
| 143 unsigned long msg_len; | |
| 144 unsigned short seq; | |
| 145 unsigned long frag_off; | |
| 146 unsigned long frag_len; | |
| 147 unsigned int is_ccs; | |
| 148 struct dtls1_retransmit_state saved_retransmit_state; | |
| 149 }; | |
| 150 | |
| 151 struct ccs_header_st | |
| 152 { | |
| 153 unsigned char type; | |
| 154 unsigned short seq; | |
| 155 }; | |
| 156 | |
| 157 struct dtls1_timeout_st | |
| 158 { | |
| 159 /* Number of read timeouts so far */ | |
| 160 unsigned int read_timeouts; | |
| 161 | |
| 162 /* Number of write timeouts so far */ | |
| 163 unsigned int write_timeouts; | |
| 164 | |
| 165 /* Number of alerts received so far */ | |
| 166 unsigned int num_alerts; | |
| 167 }; | |
| 168 | |
| 169 typedef struct record_pqueue_st | |
| 170 { | |
| 171 unsigned short epoch; | |
| 172 pqueue q; | |
| 173 } record_pqueue; | |
| 174 | |
| 175 typedef struct hm_fragment_st | |
| 176 { | |
| 177 struct hm_header_st msg_header; | |
| 178 unsigned char *fragment; | |
| 179 unsigned char *reassembly; | |
| 180 } hm_fragment; | |
| 181 | |
| 182 typedef struct dtls1_state_st | |
| 183 { | |
| 184 unsigned int send_cookie; | |
| 185 unsigned char cookie[DTLS1_COOKIE_LENGTH]; | |
| 186 unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH]; | |
| 187 unsigned int cookie_len; | |
| 188 | |
| 189 /* | |
| 190 * The current data and handshake epoch. This is initially | |
| 191 * undefined, and starts at zero once the initial handshake is | |
| 192 * completed | |
| 193 */ | |
| 194 unsigned short r_epoch; | |
| 195 unsigned short w_epoch; | |
| 196 | |
| 197 /* records being received in the current epoch */ | |
| 198 DTLS1_BITMAP bitmap; | |
| 199 | |
| 200 /* renegotiation starts a new set of sequence numbers */ | |
| 201 DTLS1_BITMAP next_bitmap; | |
| 202 | |
| 203 /* handshake message numbers */ | |
| 204 unsigned short handshake_write_seq; | |
| 205 unsigned short next_handshake_write_seq; | |
| 206 | |
| 207 unsigned short handshake_read_seq; | |
| 208 | |
| 209 /* save last sequence number for retransmissions */ | |
| 210 unsigned char last_write_sequence[8]; | |
| 211 | |
| 212 /* Received handshake records (processed and unprocessed) */ | |
| 213 record_pqueue unprocessed_rcds; | |
| 214 record_pqueue processed_rcds; | |
| 215 | |
| 216 /* Buffered handshake messages */ | |
| 217 pqueue buffered_messages; | |
| 218 | |
| 219 /* Buffered (sent) handshake records */ | |
| 220 pqueue sent_messages; | |
| 221 | |
| 222 /* Buffered application records. | |
| 223 * Only for records between CCS and Finished | |
| 224 * to prevent either protocol violation or | |
| 225 * unnecessary message loss. | |
| 226 */ | |
| 227 record_pqueue buffered_app_data; | |
| 228 | |
| 229 /* Is set when listening for new connections with dtls1_listen() */ | |
| 230 unsigned int listen; | |
| 231 | |
| 232 unsigned int mtu; /* max DTLS packet size */ | |
| 233 | |
| 234 struct hm_header_st w_msg_hdr; | |
| 235 struct hm_header_st r_msg_hdr; | |
| 236 | |
| 237 struct dtls1_timeout_st timeout; | |
| 238 | |
| 239 /* Indicates when the last handshake msg or heartbeat sent will timeout
*/ | |
| 240 struct timeval next_timeout; | |
| 241 | |
| 242 /* Timeout duration */ | |
| 243 unsigned short timeout_duration; | |
| 244 | |
| 245 /* storage for Alert/Handshake protocol data received but not | |
| 246 * yet processed by ssl3_read_bytes: */ | |
| 247 unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH]; | |
| 248 unsigned int alert_fragment_len; | |
| 249 unsigned char handshake_fragment[DTLS1_HM_HEADER_LENGTH]; | |
| 250 unsigned int handshake_fragment_len; | |
| 251 | |
| 252 unsigned int retransmitting; | |
| 253 unsigned int change_cipher_spec_ok; | |
| 254 | |
| 255 #ifndef OPENSSL_NO_SCTP | |
| 256 /* used when SSL_ST_XX_FLUSH is entered */ | |
| 257 int next_state; | |
| 258 | |
| 259 int shutdown_received; | |
| 260 #endif | |
| 261 | |
| 262 } DTLS1_STATE; | |
| 263 | |
| 264 typedef struct dtls1_record_data_st | |
| 265 { | |
| 266 unsigned char *packet; | |
| 267 unsigned int packet_length; | |
| 268 SSL3_BUFFER rbuf; | |
| 269 SSL3_RECORD rrec; | |
| 270 #ifndef OPENSSL_NO_SCTP | |
| 271 struct bio_dgram_sctp_rcvinfo recordinfo; | |
| 272 #endif | |
| 273 } DTLS1_RECORD_DATA; | |
| 274 | |
| 275 #endif | |
| 276 | |
| 277 /* Timeout multipliers (timeout slice is defined in apps/timeouts.h */ | |
| 278 #define DTLS1_TMO_READ_COUNT 2 | |
| 279 #define DTLS1_TMO_WRITE_COUNT 2 | |
| 280 | |
| 281 #define DTLS1_TMO_ALERT_COUNT 12 | |
| 282 | |
| 283 #ifdef __cplusplus | |
| 284 } | |
| 285 #endif | |
| 286 #endif | |
| 287 | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master