1 /* ssl/ssl3.h */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core (at) openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay (at) cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh (at) cryptsoft.com). 109 * 110 */ 111 /* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * ECC cipher suite support in OpenSSL originally developed by 114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 115 */ 116 117 #ifndef HEADER_SSL3_H 118 #define HEADER_SSL3_H 119 120 #include <openssl/aead.h> 121 #include <openssl/buf.h> 122 #include <openssl/evp.h> 123 #include <openssl/ssl.h> 124 #include <openssl/type_check.h> 125 126 #ifdef __cplusplus 127 extern "C" { 128 #endif 129 130 131 /* Signalling cipher suite value: from RFC5746 */ 132 #define SSL3_CK_SCSV 0x030000FF 133 /* Fallback signalling cipher suite value: not IANA assigned. 134 * See https://tools.ietf.org/html/draft-bmoeller-tls-downgrade-scsv-01 */ 135 #define SSL3_CK_FALLBACK_SCSV 0x03005600 136 137 #define SSL3_CK_RSA_NULL_MD5 0x03000001 138 #define SSL3_CK_RSA_NULL_SHA 0x03000002 139 #define SSL3_CK_RSA_RC4_40_MD5 0x03000003 140 #define SSL3_CK_RSA_RC4_128_MD5 0x03000004 141 #define SSL3_CK_RSA_RC4_128_SHA 0x03000005 142 #define SSL3_CK_RSA_RC2_40_MD5 0x03000006 143 #define SSL3_CK_RSA_IDEA_128_SHA 0x03000007 144 #define SSL3_CK_RSA_DES_40_CBC_SHA 0x03000008 145 #define SSL3_CK_RSA_DES_64_CBC_SHA 0x03000009 146 #define SSL3_CK_RSA_DES_192_CBC3_SHA 0x0300000A 147 148 #define SSL3_CK_DH_DSS_DES_40_CBC_SHA 0x0300000B 149 #define SSL3_CK_DH_DSS_DES_64_CBC_SHA 0x0300000C 150 #define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 0x0300000D 151 #define SSL3_CK_DH_RSA_DES_40_CBC_SHA 0x0300000E 152 #define SSL3_CK_DH_RSA_DES_64_CBC_SHA 0x0300000F 153 #define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 0x03000010 154 155 #define SSL3_CK_EDH_DSS_DES_40_CBC_SHA 0x03000011 156 #define SSL3_CK_EDH_DSS_DES_64_CBC_SHA 0x03000012 157 #define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA 0x03000013 158 #define SSL3_CK_EDH_RSA_DES_40_CBC_SHA 0x03000014 159 #define SSL3_CK_EDH_RSA_DES_64_CBC_SHA 0x03000015 160 #define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA 0x03000016 161 162 #define SSL3_CK_ADH_RC4_40_MD5 0x03000017 163 #define SSL3_CK_ADH_RC4_128_MD5 0x03000018 164 #define SSL3_CK_ADH_DES_40_CBC_SHA 0x03000019 165 #define SSL3_CK_ADH_DES_64_CBC_SHA 0x0300001A 166 #define SSL3_CK_ADH_DES_192_CBC_SHA 0x0300001B 167 168 #define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5" 169 #define SSL3_TXT_RSA_NULL_SHA "NULL-SHA" 170 #define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5" 171 #define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5" 172 #define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA" 173 #define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5" 174 #define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA" 175 #define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA" 176 #define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA" 177 #define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA" 178 179 #define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA" 180 #define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA" 181 #define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA" 182 #define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA" 183 #define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA" 184 #define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA" 185 186 #define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA" 187 #define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA" 188 #define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA" 189 #define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA" 190 #define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA" 191 #define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA" 192 193 #define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5" 194 #define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5" 195 #define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA" 196 #define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA" 197 #define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA" 198 199 #define SSL3_SSL_SESSION_ID_LENGTH 32 200 #define SSL3_MAX_SSL_SESSION_ID_LENGTH 32 201 202 #define SSL3_MASTER_SECRET_SIZE 48 203 #define SSL3_RANDOM_SIZE 32 204 #define SSL3_SESSION_ID_SIZE 32 205 #define SSL3_RT_HEADER_LENGTH 5 206 207 #define SSL3_HM_HEADER_LENGTH 4 208 209 #ifndef SSL3_ALIGN_PAYLOAD 210 /* Some will argue that this increases memory footprint, but it's not actually 211 * true. Point is that malloc has to return at least 64-bit aligned pointers, 212 * meaning that allocating 5 bytes wastes 3 bytes in either case. Suggested 213 * pre-gaping simply moves these wasted bytes from the end of allocated region 214 * to its front, but makes data payload aligned, which improves performance. */ 215 #define SSL3_ALIGN_PAYLOAD 8 216 #else 217 #if (SSL3_ALIGN_PAYLOAD & (SSL3_ALIGN_PAYLOAD - 1)) != 0 218 #error "insane SSL3_ALIGN_PAYLOAD" 219 #undef SSL3_ALIGN_PAYLOAD 220 #endif 221 #endif 222 223 /* This is the maximum MAC (digest) size used by the SSL library. Currently 224 * maximum of 20 is used by SHA1, but we reserve for future extension for 225 * 512-bit hashes. */ 226 227 #define SSL3_RT_MAX_MD_SIZE 64 228 229 /* Maximum block size used in all ciphersuites. Currently 16 for AES. */ 230 231 #define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16 232 233 #define SSL3_RT_MAX_EXTRA (16384) 234 235 /* Maximum plaintext length: defined by SSL/TLS standards */ 236 #define SSL3_RT_MAX_PLAIN_LENGTH 16384 237 /* Maximum compression overhead: defined by SSL/TLS standards */ 238 #define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024 239 240 /* The standards give a maximum encryption overhead of 1024 bytes. In practice 241 * the value is lower than this. The overhead is the maximum number of padding 242 * bytes (256) plus the mac size. 243 * 244 * TODO(davidben): This derivation doesn't take AEADs into account, or TLS 1.1 245 * explicit nonces. It happens to work because |SSL3_RT_MAX_MD_SIZE| is larger 246 * than necessary and no true AEAD has variable overhead in TLS 1.2. */ 247 #define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE) 248 249 /* SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD is the maximum overhead in encrypting a 250 * record. This does not include the record header. Some ciphers use explicit 251 * nonces, so it includes both the AEAD overhead as well as the nonce. */ 252 #define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \ 253 (EVP_AEAD_MAX_OVERHEAD + EVP_AEAD_MAX_NONCE_LENGTH) 254 255 OPENSSL_COMPILE_ASSERT( 256 SSL3_RT_MAX_ENCRYPTED_OVERHEAD >= SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD, 257 max_overheads_are_consistent); 258 259 /* SSL3_RT_MAX_COMPRESSED_LENGTH is an alias for 260 * |SSL3_RT_MAX_PLAIN_LENGTH|. Compression is gone, so don't include the 261 * compression overhead. */ 262 #define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH 263 264 #define SSL3_RT_MAX_ENCRYPTED_LENGTH \ 265 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD + SSL3_RT_MAX_COMPRESSED_LENGTH) 266 #define SSL3_RT_MAX_PACKET_SIZE \ 267 (SSL3_RT_MAX_ENCRYPTED_LENGTH + SSL3_RT_HEADER_LENGTH) 268 269 #define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54" 270 #define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52" 271 272 #define SSL3_VERSION 0x0300 273 #define SSL3_VERSION_MAJOR 0x03 274 #define SSL3_VERSION_MINOR 0x00 275 276 #define SSL3_RT_CHANGE_CIPHER_SPEC 20 277 #define SSL3_RT_ALERT 21 278 #define SSL3_RT_HANDSHAKE 22 279 #define SSL3_RT_APPLICATION_DATA 23 280 281 /* Pseudo content types to indicate additional parameters */ 282 #define TLS1_RT_CRYPTO 0x1000 283 #define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1) 284 #define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2) 285 #define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3) 286 #define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4) 287 288 #define TLS1_RT_CRYPTO_READ 0x0000 289 #define TLS1_RT_CRYPTO_WRITE 0x0100 290 #define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5) 291 #define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6) 292 #define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7) 293 #define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8) 294 295 /* Pseudo content type for SSL/TLS header info */ 296 #define SSL3_RT_HEADER 0x100 297 298 #define SSL3_AL_WARNING 1 299 #define SSL3_AL_FATAL 2 300 301 #define SSL3_AD_CLOSE_NOTIFY 0 302 #define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */ 303 #define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */ 304 #define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */ 305 #define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */ 306 #define SSL3_AD_NO_CERTIFICATE 41 307 #define SSL3_AD_BAD_CERTIFICATE 42 308 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43 309 #define SSL3_AD_CERTIFICATE_REVOKED 44 310 #define SSL3_AD_CERTIFICATE_EXPIRED 45 311 #define SSL3_AD_CERTIFICATE_UNKNOWN 46 312 #define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */ 313 #define SSL3_AD_INAPPROPRIATE_FALLBACK 86 /* fatal */ 314 315 typedef struct ssl3_record_st { 316 /* type is the record type. */ 317 uint8_t type; 318 /* length is the number of unconsumed bytes of |data|. */ 319 uint16_t length; 320 /* off is the number of consumed bytes of |data|. */ 321 uint16_t off; 322 /* data is a non-owning pointer to the record contents. The total length of 323 * the buffer is |off| + |length|. */ 324 uint8_t *data; 325 /* epoch, in DTLS, is the epoch number of the record. */ 326 uint16_t epoch; 327 /* seq_num, in DTLS, is the sequence number of the record. The top two bytes 328 * are always zero. 329 * 330 * TODO(davidben): This is confusing. They should include the epoch or the 331 * field should be six bytes. */ 332 uint8_t seq_num[8]; 333 } SSL3_RECORD; 334 335 typedef struct ssl3_buffer_st { 336 uint8_t *buf; /* at least SSL3_RT_MAX_PACKET_SIZE bytes, see 337 ssl3_setup_buffers() */ 338 size_t len; /* buffer size */ 339 int offset; /* where to 'copy from' */ 340 int left; /* how many bytes left */ 341 } SSL3_BUFFER; 342 343 #define SSL3_CT_RSA_SIGN 1 344 #define SSL3_CT_DSS_SIGN 2 345 #define SSL3_CT_RSA_FIXED_DH 3 346 #define SSL3_CT_DSS_FIXED_DH 4 347 #define SSL3_CT_RSA_EPHEMERAL_DH 5 348 #define SSL3_CT_DSS_EPHEMERAL_DH 6 349 #define SSL3_CT_FORTEZZA_DMS 20 350 351 352 /* TODO(davidben): This flag can probably be merged into s3->change_cipher_spec 353 * to something tri-state. (Normal / Expect CCS / Between CCS and Finished). */ 354 #define SSL3_FLAGS_EXPECT_CCS 0x0080 355 356 typedef struct ssl3_state_st { 357 long flags; 358 359 uint8_t read_sequence[8]; 360 int read_mac_secret_size; 361 uint8_t read_mac_secret[EVP_MAX_MD_SIZE]; 362 uint8_t write_sequence[8]; 363 int write_mac_secret_size; 364 uint8_t write_mac_secret[EVP_MAX_MD_SIZE]; 365 366 uint8_t server_random[SSL3_RANDOM_SIZE]; 367 uint8_t client_random[SSL3_RANDOM_SIZE]; 368 369 /* flags for countermeasure against known-IV weakness */ 370 int need_record_splitting; 371 372 /* The value of 'extra' when the buffers were initialized */ 373 int init_extra; 374 375 /* have_version is true if the connection's final version is known. Otherwise 376 * the version has not been negotiated yet. */ 377 char have_version; 378 379 /* initial_handshake_complete is true if the initial handshake has 380 * completed. */ 381 char initial_handshake_complete; 382 383 /* sniff_buffer is used by the server in the initial handshake to read a 384 * V2ClientHello before the record layer is initialized. */ 385 BUF_MEM *sniff_buffer; 386 size_t sniff_buffer_len; 387 388 SSL3_BUFFER rbuf; /* read IO goes into here */ 389 SSL3_BUFFER wbuf; /* write IO goes into here */ 390 391 SSL3_RECORD rrec; /* each decoded record goes in here */ 392 393 /* storage for Handshake protocol data received but not yet processed by 394 * ssl3_read_bytes: */ 395 uint8_t handshake_fragment[4]; 396 unsigned int handshake_fragment_len; 397 398 /* partial write - check the numbers match */ 399 unsigned int wnum; /* number of bytes sent so far */ 400 int wpend_tot; /* number bytes written */ 401 int wpend_type; 402 int wpend_ret; /* number of bytes submitted */ 403 const uint8_t *wpend_buf; 404 405 /* used during startup, digest all incoming/outgoing packets */ 406 BIO *handshake_buffer; 407 /* When set of handshake digests is determined, buffer is hashed and freed 408 * and MD_CTX-es for all required digests are stored in this array */ 409 EVP_MD_CTX **handshake_dgst; 410 /* this is set whenerver we see a change_cipher_spec message come in when we 411 * are not looking for one */ 412 int change_cipher_spec; 413 414 int warn_alert; 415 int fatal_alert; 416 /* we allow one fatal and one warning alert to be outstanding, send close 417 * alert via the warning alert */ 418 int alert_dispatch; 419 uint8_t send_alert[2]; 420 421 int total_renegotiations; 422 423 /* State pertaining to the pending handshake. 424 * 425 * TODO(davidben): State is current spread all over the place. Move 426 * pending handshake state here so it can be managed separately from 427 * established connection state in case of renegotiations. */ 428 struct { 429 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */ 430 uint8_t finish_md[EVP_MAX_MD_SIZE * 2]; 431 int finish_md_len; 432 uint8_t peer_finish_md[EVP_MAX_MD_SIZE * 2]; 433 int peer_finish_md_len; 434 435 unsigned long message_size; 436 int message_type; 437 438 /* used to hold the new cipher we are going to use */ 439 const SSL_CIPHER *new_cipher; 440 DH *dh; 441 442 EC_KEY *ecdh; /* holds short lived ECDH key */ 443 444 /* used when SSL_ST_FLUSH_DATA is entered */ 445 int next_state; 446 447 int reuse_message; 448 449 /* Client-only: cert_req determines if a client certificate is to be sent. 450 * This is 0 if no client Certificate message is to be sent, 1 if there is 451 * a client certificate, and 2 to send an empty client Certificate 452 * message. */ 453 int cert_req; 454 455 /* Client-only: ca_names contains the list of CAs received in a 456 * CertificateRequest message. */ 457 STACK_OF(X509_NAME) *ca_names; 458 459 /* Client-only: certificate_types contains the set of certificate types 460 * received in a CertificateRequest message. */ 461 uint8_t *certificate_types; 462 size_t num_certificate_types; 463 464 int key_block_length; 465 uint8_t *key_block; 466 467 const EVP_AEAD *new_aead; 468 uint8_t new_mac_secret_len; 469 uint8_t new_fixed_iv_len; 470 uint8_t new_variable_iv_len; 471 472 /* Server-only: cert_request is true if a client certificate was 473 * requested. */ 474 int cert_request; 475 476 /* certificate_status_expected is true if OCSP stapling was negotiated and 477 * the server is expected to send a CertificateStatus message. */ 478 char certificate_status_expected; 479 480 /* peer_ecpointformatlist contains the EC point formats advertised by the 481 * peer. */ 482 uint8_t *peer_ecpointformatlist; 483 size_t peer_ecpointformatlist_length; 484 485 /* Server-only: peer_ellipticcurvelist contains the EC curve IDs advertised 486 * by the peer. This is only set on the server's end. The server does not 487 * advertise this extension to the client. */ 488 uint16_t *peer_ellipticcurvelist; 489 size_t peer_ellipticcurvelist_length; 490 491 /* extended_master_secret indicates whether the extended master secret 492 * computation is used in this handshake. Note that this is different from 493 * whether it was used for the current session. If this is a resumption 494 * handshake then EMS might be negotiated in the client and server hello 495 * messages, but it doesn't matter if the session that's being resumed 496 * didn't use it to create the master secret initially. */ 497 char extended_master_secret; 498 499 /* Client-only: peer_psk_identity_hint is the psk_identity_hint sent by the 500 * server when using a PSK key exchange. */ 501 char *peer_psk_identity_hint; 502 503 /* new_mac_secret_size is unused and exists only until wpa_supplicant can 504 * be updated. It is only needed for EAP-FAST, which we don't support. */ 505 uint8_t new_mac_secret_size; 506 507 /* Client-only: in_false_start is one if there is a pending handshake in 508 * False Start. The client may write data at this point. */ 509 char in_false_start; 510 } tmp; 511 512 /* Connection binding to prevent renegotiation attacks */ 513 uint8_t previous_client_finished[EVP_MAX_MD_SIZE]; 514 uint8_t previous_client_finished_len; 515 uint8_t previous_server_finished[EVP_MAX_MD_SIZE]; 516 uint8_t previous_server_finished_len; 517 int send_connection_binding; /* TODOEKR */ 518 519 /* Set if we saw the Next Protocol Negotiation extension from our peer. */ 520 int next_proto_neg_seen; 521 522 /* ALPN information 523 * (we are in the process of transitioning from NPN to ALPN.) */ 524 525 /* In a server these point to the selected ALPN protocol after the 526 * ClientHello has been processed. In a client these contain the protocol 527 * that the server selected once the ServerHello has been processed. */ 528 uint8_t *alpn_selected; 529 size_t alpn_selected_len; 530 531 /* In a client, this means that the server supported Channel ID and that a 532 * Channel ID was sent. In a server it means that we echoed support for 533 * Channel IDs and that tlsext_channel_id will be valid after the 534 * handshake. */ 535 char tlsext_channel_id_valid; 536 /* tlsext_channel_id_new means that the updated Channel ID extension was 537 * negotiated. This is a temporary hack in the code to support both forms of 538 * Channel ID extension while we transition to the new format, which fixed a 539 * security issue. */ 540 char tlsext_channel_id_new; 541 /* For a server: 542 * If |tlsext_channel_id_valid| is true, then this contains the 543 * verified Channel ID from the client: a P256 point, (x,y), where 544 * each are big-endian values. */ 545 uint8_t tlsext_channel_id[64]; 546 } SSL3_STATE; 547 548 /* SSLv3 */ 549 /* client */ 550 /* extra state */ 551 #define SSL3_ST_CW_FLUSH (0x100 | SSL_ST_CONNECT) 552 #define SSL3_ST_FALSE_START (0x101 | SSL_ST_CONNECT) 553 /* write to server */ 554 #define SSL3_ST_CW_CLNT_HELLO_A (0x110 | SSL_ST_CONNECT) 555 #define SSL3_ST_CW_CLNT_HELLO_B (0x111 | SSL_ST_CONNECT) 556 /* read from server */ 557 #define SSL3_ST_CR_SRVR_HELLO_A (0x120 | SSL_ST_CONNECT) 558 #define SSL3_ST_CR_SRVR_HELLO_B (0x121 | SSL_ST_CONNECT) 559 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126 | SSL_ST_CONNECT) 560 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127 | SSL_ST_CONNECT) 561 #define SSL3_ST_CR_CERT_A (0x130 | SSL_ST_CONNECT) 562 #define SSL3_ST_CR_CERT_B (0x131 | SSL_ST_CONNECT) 563 #define SSL3_ST_CR_KEY_EXCH_A (0x140 | SSL_ST_CONNECT) 564 #define SSL3_ST_CR_KEY_EXCH_B (0x141 | SSL_ST_CONNECT) 565 #define SSL3_ST_CR_CERT_REQ_A (0x150 | SSL_ST_CONNECT) 566 #define SSL3_ST_CR_CERT_REQ_B (0x151 | SSL_ST_CONNECT) 567 #define SSL3_ST_CR_SRVR_DONE_A (0x160 | SSL_ST_CONNECT) 568 #define SSL3_ST_CR_SRVR_DONE_B (0x161 | SSL_ST_CONNECT) 569 /* write to server */ 570 #define SSL3_ST_CW_CERT_A (0x170 | SSL_ST_CONNECT) 571 #define SSL3_ST_CW_CERT_B (0x171 | SSL_ST_CONNECT) 572 #define SSL3_ST_CW_CERT_C (0x172 | SSL_ST_CONNECT) 573 #define SSL3_ST_CW_CERT_D (0x173 | SSL_ST_CONNECT) 574 #define SSL3_ST_CW_KEY_EXCH_A (0x180 | SSL_ST_CONNECT) 575 #define SSL3_ST_CW_KEY_EXCH_B (0x181 | SSL_ST_CONNECT) 576 #define SSL3_ST_CW_CERT_VRFY_A (0x190 | SSL_ST_CONNECT) 577 #define SSL3_ST_CW_CERT_VRFY_B (0x191 | SSL_ST_CONNECT) 578 #define SSL3_ST_CW_CHANGE_A (0x1A0 | SSL_ST_CONNECT) 579 #define SSL3_ST_CW_CHANGE_B (0x1A1 | SSL_ST_CONNECT) 580 #define SSL3_ST_CW_NEXT_PROTO_A (0x200 | SSL_ST_CONNECT) 581 #define SSL3_ST_CW_NEXT_PROTO_B (0x201 | SSL_ST_CONNECT) 582 #define SSL3_ST_CW_CHANNEL_ID_A (0x220 | SSL_ST_CONNECT) 583 #define SSL3_ST_CW_CHANNEL_ID_B (0x221 | SSL_ST_CONNECT) 584 #define SSL3_ST_CW_FINISHED_A (0x1B0 | SSL_ST_CONNECT) 585 #define SSL3_ST_CW_FINISHED_B (0x1B1 | SSL_ST_CONNECT) 586 /* read from server */ 587 #define SSL3_ST_CR_CHANGE (0x1C0 | SSL_ST_CONNECT) 588 #define SSL3_ST_CR_FINISHED_A (0x1D0 | SSL_ST_CONNECT) 589 #define SSL3_ST_CR_FINISHED_B (0x1D1 | SSL_ST_CONNECT) 590 #define SSL3_ST_CR_SESSION_TICKET_A (0x1E0 | SSL_ST_CONNECT) 591 #define SSL3_ST_CR_SESSION_TICKET_B (0x1E1 | SSL_ST_CONNECT) 592 #define SSL3_ST_CR_CERT_STATUS_A (0x1F0 | SSL_ST_CONNECT) 593 #define SSL3_ST_CR_CERT_STATUS_B (0x1F1 | SSL_ST_CONNECT) 594 595 /* server */ 596 /* extra state */ 597 #define SSL3_ST_SW_FLUSH (0x100 | SSL_ST_ACCEPT) 598 /* read from client */ 599 #define SSL3_ST_SR_INITIAL_BYTES (0x240 | SSL_ST_ACCEPT) 600 #define SSL3_ST_SR_V2_CLIENT_HELLO (0x241 | SSL_ST_ACCEPT) 601 /* Do not change the number values, they do matter */ 602 #define SSL3_ST_SR_CLNT_HELLO_A (0x110 | SSL_ST_ACCEPT) 603 #define SSL3_ST_SR_CLNT_HELLO_B (0x111 | SSL_ST_ACCEPT) 604 #define SSL3_ST_SR_CLNT_HELLO_C (0x112 | SSL_ST_ACCEPT) 605 #define SSL3_ST_SR_CLNT_HELLO_D (0x115 | SSL_ST_ACCEPT) 606 /* write to client */ 607 #define SSL3_ST_SW_HELLO_REQ_A (0x120 | SSL_ST_ACCEPT) 608 #define SSL3_ST_SW_HELLO_REQ_B (0x121 | SSL_ST_ACCEPT) 609 #define SSL3_ST_SW_HELLO_REQ_C (0x122 | SSL_ST_ACCEPT) 610 #define SSL3_ST_SW_SRVR_HELLO_A (0x130 | SSL_ST_ACCEPT) 611 #define SSL3_ST_SW_SRVR_HELLO_B (0x131 | SSL_ST_ACCEPT) 612 #define SSL3_ST_SW_CERT_A (0x140 | SSL_ST_ACCEPT) 613 #define SSL3_ST_SW_CERT_B (0x141 | SSL_ST_ACCEPT) 614 #define SSL3_ST_SW_KEY_EXCH_A (0x150 | SSL_ST_ACCEPT) 615 #define SSL3_ST_SW_KEY_EXCH_B (0x151 | SSL_ST_ACCEPT) 616 #define SSL3_ST_SW_CERT_REQ_A (0x160 | SSL_ST_ACCEPT) 617 #define SSL3_ST_SW_CERT_REQ_B (0x161 | SSL_ST_ACCEPT) 618 #define SSL3_ST_SW_SRVR_DONE_A (0x170 | SSL_ST_ACCEPT) 619 #define SSL3_ST_SW_SRVR_DONE_B (0x171 | SSL_ST_ACCEPT) 620 /* read from client */ 621 #define SSL3_ST_SR_CERT_A (0x180 | SSL_ST_ACCEPT) 622 #define SSL3_ST_SR_CERT_B (0x181 | SSL_ST_ACCEPT) 623 #define SSL3_ST_SR_KEY_EXCH_A (0x190 | SSL_ST_ACCEPT) 624 #define SSL3_ST_SR_KEY_EXCH_B (0x191 | SSL_ST_ACCEPT) 625 #define SSL3_ST_SR_CERT_VRFY_A (0x1A0 | SSL_ST_ACCEPT) 626 #define SSL3_ST_SR_CERT_VRFY_B (0x1A1 | SSL_ST_ACCEPT) 627 #define SSL3_ST_SR_CHANGE (0x1B0 | SSL_ST_ACCEPT) 628 #define SSL3_ST_SR_NEXT_PROTO_A (0x210 | SSL_ST_ACCEPT) 629 #define SSL3_ST_SR_NEXT_PROTO_B (0x211 | SSL_ST_ACCEPT) 630 #define SSL3_ST_SR_CHANNEL_ID_A (0x230 | SSL_ST_ACCEPT) 631 #define SSL3_ST_SR_CHANNEL_ID_B (0x231 | SSL_ST_ACCEPT) 632 #define SSL3_ST_SR_FINISHED_A (0x1C0 | SSL_ST_ACCEPT) 633 #define SSL3_ST_SR_FINISHED_B (0x1C1 | SSL_ST_ACCEPT) 634 635 /* write to client */ 636 #define SSL3_ST_SW_CHANGE_A (0x1D0 | SSL_ST_ACCEPT) 637 #define SSL3_ST_SW_CHANGE_B (0x1D1 | SSL_ST_ACCEPT) 638 #define SSL3_ST_SW_FINISHED_A (0x1E0 | SSL_ST_ACCEPT) 639 #define SSL3_ST_SW_FINISHED_B (0x1E1 | SSL_ST_ACCEPT) 640 #define SSL3_ST_SW_SESSION_TICKET_A (0x1F0 | SSL_ST_ACCEPT) 641 #define SSL3_ST_SW_SESSION_TICKET_B (0x1F1 | SSL_ST_ACCEPT) 642 #define SSL3_ST_SW_CERT_STATUS_A (0x200 | SSL_ST_ACCEPT) 643 #define SSL3_ST_SW_CERT_STATUS_B (0x201 | SSL_ST_ACCEPT) 644 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_A (0x220 | SSL_ST_ACCEPT) 645 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_B (0x221 | SSL_ST_ACCEPT) 646 647 #define SSL3_MT_HELLO_REQUEST 0 648 #define SSL3_MT_CLIENT_HELLO 1 649 #define SSL3_MT_SERVER_HELLO 2 650 #define SSL3_MT_NEWSESSION_TICKET 4 651 #define SSL3_MT_CERTIFICATE 11 652 #define SSL3_MT_SERVER_KEY_EXCHANGE 12 653 #define SSL3_MT_CERTIFICATE_REQUEST 13 654 #define SSL3_MT_SERVER_DONE 14 655 #define SSL3_MT_CERTIFICATE_VERIFY 15 656 #define SSL3_MT_CLIENT_KEY_EXCHANGE 16 657 #define SSL3_MT_FINISHED 20 658 #define SSL3_MT_CERTIFICATE_STATUS 22 659 #define SSL3_MT_SUPPLEMENTAL_DATA 23 660 #define SSL3_MT_NEXT_PROTO 67 661 #define SSL3_MT_ENCRYPTED_EXTENSIONS 203 662 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3 663 664 665 #define SSL3_MT_CCS 1 666 667 /* These are used when changing over to a new cipher */ 668 #define SSL3_CC_READ 0x01 669 #define SSL3_CC_WRITE 0x02 670 #define SSL3_CC_CLIENT 0x10 671 #define SSL3_CC_SERVER 0x20 672 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT | SSL3_CC_WRITE) 673 #define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER | SSL3_CC_READ) 674 #define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT | SSL3_CC_READ) 675 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER | SSL3_CC_WRITE) 676 677 678 #ifdef __cplusplus 679 } 680 #endif 681 #endif 682
