ssl3.h revision 296341
1/* ssl/ssl3.h */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@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@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@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@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@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@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@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# ifndef OPENSSL_NO_COMP 121# include <openssl/comp.h> 122# endif 123# include <openssl/buffer.h> 124# include <openssl/evp.h> 125# include <openssl/ssl.h> 126 127#ifdef __cplusplus 128extern "C" { 129#endif 130 131/* 132 * Signalling cipher suite value from RFC 5746 133 * (TLS_EMPTY_RENEGOTIATION_INFO_SCSV) 134 */ 135# define SSL3_CK_SCSV 0x030000FF 136 137/* 138 * Signalling cipher suite value from draft-ietf-tls-downgrade-scsv-00 139 * (TLS_FALLBACK_SCSV) 140 */ 141# define SSL3_CK_FALLBACK_SCSV 0x03005600 142 143# define SSL3_CK_RSA_NULL_MD5 0x03000001 144# define SSL3_CK_RSA_NULL_SHA 0x03000002 145# define SSL3_CK_RSA_RC4_40_MD5 0x03000003 146# define SSL3_CK_RSA_RC4_128_MD5 0x03000004 147# define SSL3_CK_RSA_RC4_128_SHA 0x03000005 148# define SSL3_CK_RSA_RC2_40_MD5 0x03000006 149# define SSL3_CK_RSA_IDEA_128_SHA 0x03000007 150# define SSL3_CK_RSA_DES_40_CBC_SHA 0x03000008 151# define SSL3_CK_RSA_DES_64_CBC_SHA 0x03000009 152# define SSL3_CK_RSA_DES_192_CBC3_SHA 0x0300000A 153 154# define SSL3_CK_DH_DSS_DES_40_CBC_SHA 0x0300000B 155# define SSL3_CK_DH_DSS_DES_64_CBC_SHA 0x0300000C 156# define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 0x0300000D 157# define SSL3_CK_DH_RSA_DES_40_CBC_SHA 0x0300000E 158# define SSL3_CK_DH_RSA_DES_64_CBC_SHA 0x0300000F 159# define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 0x03000010 160 161# define SSL3_CK_EDH_DSS_DES_40_CBC_SHA 0x03000011 162# define SSL3_CK_EDH_DSS_DES_64_CBC_SHA 0x03000012 163# define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA 0x03000013 164# define SSL3_CK_EDH_RSA_DES_40_CBC_SHA 0x03000014 165# define SSL3_CK_EDH_RSA_DES_64_CBC_SHA 0x03000015 166# define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA 0x03000016 167 168# define SSL3_CK_ADH_RC4_40_MD5 0x03000017 169# define SSL3_CK_ADH_RC4_128_MD5 0x03000018 170# define SSL3_CK_ADH_DES_40_CBC_SHA 0x03000019 171# define SSL3_CK_ADH_DES_64_CBC_SHA 0x0300001A 172# define SSL3_CK_ADH_DES_192_CBC_SHA 0x0300001B 173 174# if 0 175# define SSL3_CK_FZA_DMS_NULL_SHA 0x0300001C 176# define SSL3_CK_FZA_DMS_FZA_SHA 0x0300001D 177# if 0 /* Because it clashes with KRB5, is never 178 * used any more, and is safe to remove 179 * according to David Hopwood 180 * <david.hopwood@zetnet.co.uk> of the 181 * ietf-tls list */ 182# define SSL3_CK_FZA_DMS_RC4_SHA 0x0300001E 183# endif 184# endif 185 186/* 187 * VRS Additional Kerberos5 entries 188 */ 189# define SSL3_CK_KRB5_DES_64_CBC_SHA 0x0300001E 190# define SSL3_CK_KRB5_DES_192_CBC3_SHA 0x0300001F 191# define SSL3_CK_KRB5_RC4_128_SHA 0x03000020 192# define SSL3_CK_KRB5_IDEA_128_CBC_SHA 0x03000021 193# define SSL3_CK_KRB5_DES_64_CBC_MD5 0x03000022 194# define SSL3_CK_KRB5_DES_192_CBC3_MD5 0x03000023 195# define SSL3_CK_KRB5_RC4_128_MD5 0x03000024 196# define SSL3_CK_KRB5_IDEA_128_CBC_MD5 0x03000025 197 198# define SSL3_CK_KRB5_DES_40_CBC_SHA 0x03000026 199# define SSL3_CK_KRB5_RC2_40_CBC_SHA 0x03000027 200# define SSL3_CK_KRB5_RC4_40_SHA 0x03000028 201# define SSL3_CK_KRB5_DES_40_CBC_MD5 0x03000029 202# define SSL3_CK_KRB5_RC2_40_CBC_MD5 0x0300002A 203# define SSL3_CK_KRB5_RC4_40_MD5 0x0300002B 204 205# define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5" 206# define SSL3_TXT_RSA_NULL_SHA "NULL-SHA" 207# define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5" 208# define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5" 209# define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA" 210# define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5" 211# define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA" 212# define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA" 213# define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA" 214# define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA" 215 216# define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA" 217# define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA" 218# define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA" 219# define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA" 220# define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA" 221# define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA" 222 223# define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA" 224# define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA" 225# define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA" 226# define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA" 227# define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA" 228# define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA" 229 230# define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5" 231# define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5" 232# define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA" 233# define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA" 234# define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA" 235 236# if 0 237# define SSL3_TXT_FZA_DMS_NULL_SHA "FZA-NULL-SHA" 238# define SSL3_TXT_FZA_DMS_FZA_SHA "FZA-FZA-CBC-SHA" 239# define SSL3_TXT_FZA_DMS_RC4_SHA "FZA-RC4-SHA" 240# endif 241 242# define SSL3_TXT_KRB5_DES_64_CBC_SHA "KRB5-DES-CBC-SHA" 243# define SSL3_TXT_KRB5_DES_192_CBC3_SHA "KRB5-DES-CBC3-SHA" 244# define SSL3_TXT_KRB5_RC4_128_SHA "KRB5-RC4-SHA" 245# define SSL3_TXT_KRB5_IDEA_128_CBC_SHA "KRB5-IDEA-CBC-SHA" 246# define SSL3_TXT_KRB5_DES_64_CBC_MD5 "KRB5-DES-CBC-MD5" 247# define SSL3_TXT_KRB5_DES_192_CBC3_MD5 "KRB5-DES-CBC3-MD5" 248# define SSL3_TXT_KRB5_RC4_128_MD5 "KRB5-RC4-MD5" 249# define SSL3_TXT_KRB5_IDEA_128_CBC_MD5 "KRB5-IDEA-CBC-MD5" 250 251# define SSL3_TXT_KRB5_DES_40_CBC_SHA "EXP-KRB5-DES-CBC-SHA" 252# define SSL3_TXT_KRB5_RC2_40_CBC_SHA "EXP-KRB5-RC2-CBC-SHA" 253# define SSL3_TXT_KRB5_RC4_40_SHA "EXP-KRB5-RC4-SHA" 254# define SSL3_TXT_KRB5_DES_40_CBC_MD5 "EXP-KRB5-DES-CBC-MD5" 255# define SSL3_TXT_KRB5_RC2_40_CBC_MD5 "EXP-KRB5-RC2-CBC-MD5" 256# define SSL3_TXT_KRB5_RC4_40_MD5 "EXP-KRB5-RC4-MD5" 257 258# define SSL3_SSL_SESSION_ID_LENGTH 32 259# define SSL3_MAX_SSL_SESSION_ID_LENGTH 32 260 261# define SSL3_MASTER_SECRET_SIZE 48 262# define SSL3_RANDOM_SIZE 32 263# define SSL3_SESSION_ID_SIZE 32 264# define SSL3_RT_HEADER_LENGTH 5 265 266# ifndef SSL3_ALIGN_PAYLOAD 267 /* 268 * Some will argue that this increases memory footprint, but it's not 269 * actually true. Point is that malloc has to return at least 64-bit aligned 270 * pointers, meaning that allocating 5 bytes wastes 3 bytes in either case. 271 * Suggested pre-gaping simply moves these wasted bytes from the end of 272 * allocated region to its front, but makes data payload aligned, which 273 * improves performance:-) 274 */ 275# define SSL3_ALIGN_PAYLOAD 8 276# else 277# if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0 278# error "insane SSL3_ALIGN_PAYLOAD" 279# undef SSL3_ALIGN_PAYLOAD 280# endif 281# endif 282 283/* 284 * This is the maximum MAC (digest) size used by the SSL library. Currently 285 * maximum of 20 is used by SHA1, but we reserve for future extension for 286 * 512-bit hashes. 287 */ 288 289# define SSL3_RT_MAX_MD_SIZE 64 290 291/* 292 * Maximum block size used in all ciphersuites. Currently 16 for AES. 293 */ 294 295# define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16 296 297# define SSL3_RT_MAX_EXTRA (16384) 298 299/* Maximum plaintext length: defined by SSL/TLS standards */ 300# define SSL3_RT_MAX_PLAIN_LENGTH 16384 301/* Maximum compression overhead: defined by SSL/TLS standards */ 302# define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024 303 304/* 305 * The standards give a maximum encryption overhead of 1024 bytes. In 306 * practice the value is lower than this. The overhead is the maximum number 307 * of padding bytes (256) plus the mac size. 308 */ 309# define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE) 310 311/* 312 * OpenSSL currently only uses a padding length of at most one block so the 313 * send overhead is smaller. 314 */ 315 316# define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \ 317 (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE) 318 319/* If compression isn't used don't include the compression overhead */ 320 321# ifdef OPENSSL_NO_COMP 322# define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH 323# else 324# define SSL3_RT_MAX_COMPRESSED_LENGTH \ 325 (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD) 326# endif 327# define SSL3_RT_MAX_ENCRYPTED_LENGTH \ 328 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH) 329# define SSL3_RT_MAX_PACKET_SIZE \ 330 (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH) 331 332# define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54" 333# define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52" 334 335# define SSL3_VERSION 0x0300 336# define SSL3_VERSION_MAJOR 0x03 337# define SSL3_VERSION_MINOR 0x00 338 339# define SSL3_RT_CHANGE_CIPHER_SPEC 20 340# define SSL3_RT_ALERT 21 341# define SSL3_RT_HANDSHAKE 22 342# define SSL3_RT_APPLICATION_DATA 23 343# define TLS1_RT_HEARTBEAT 24 344 345# define SSL3_AL_WARNING 1 346# define SSL3_AL_FATAL 2 347 348# define SSL3_AD_CLOSE_NOTIFY 0 349# define SSL3_AD_UNEXPECTED_MESSAGE 10/* fatal */ 350# define SSL3_AD_BAD_RECORD_MAC 20/* fatal */ 351# define SSL3_AD_DECOMPRESSION_FAILURE 30/* fatal */ 352# define SSL3_AD_HANDSHAKE_FAILURE 40/* fatal */ 353# define SSL3_AD_NO_CERTIFICATE 41 354# define SSL3_AD_BAD_CERTIFICATE 42 355# define SSL3_AD_UNSUPPORTED_CERTIFICATE 43 356# define SSL3_AD_CERTIFICATE_REVOKED 44 357# define SSL3_AD_CERTIFICATE_EXPIRED 45 358# define SSL3_AD_CERTIFICATE_UNKNOWN 46 359# define SSL3_AD_ILLEGAL_PARAMETER 47/* fatal */ 360 361# define TLS1_HB_REQUEST 1 362# define TLS1_HB_RESPONSE 2 363 364# ifndef OPENSSL_NO_SSL_INTERN 365 366typedef struct ssl3_record_st { 367 /* type of record */ 368 /* 369 * r 370 */ int type; 371 /* How many bytes available */ 372 /* 373 * rw 374 */ unsigned int length; 375 /* read/write offset into 'buf' */ 376 /* 377 * r 378 */ unsigned int off; 379 /* pointer to the record data */ 380 /* 381 * rw 382 */ unsigned char *data; 383 /* where the decode bytes are */ 384 /* 385 * rw 386 */ unsigned char *input; 387 /* only used with decompression - malloc()ed */ 388 /* 389 * r 390 */ unsigned char *comp; 391 /* epoch number, needed by DTLS1 */ 392 /* 393 * r 394 */ unsigned long epoch; 395 /* sequence number, needed by DTLS1 */ 396 /* 397 * r 398 */ unsigned char seq_num[8]; 399} SSL3_RECORD; 400 401typedef struct ssl3_buffer_st { 402 /* at least SSL3_RT_MAX_PACKET_SIZE bytes, see ssl3_setup_buffers() */ 403 unsigned char *buf; 404 /* buffer size */ 405 size_t len; 406 /* where to 'copy from' */ 407 int offset; 408 /* how many bytes left */ 409 int left; 410} SSL3_BUFFER; 411 412# endif 413 414# define SSL3_CT_RSA_SIGN 1 415# define SSL3_CT_DSS_SIGN 2 416# define SSL3_CT_RSA_FIXED_DH 3 417# define SSL3_CT_DSS_FIXED_DH 4 418# define SSL3_CT_RSA_EPHEMERAL_DH 5 419# define SSL3_CT_DSS_EPHEMERAL_DH 6 420# define SSL3_CT_FORTEZZA_DMS 20 421/* 422 * SSL3_CT_NUMBER is used to size arrays and it must be large enough to 423 * contain all of the cert types defined either for SSLv3 and TLSv1. 424 */ 425# define SSL3_CT_NUMBER 9 426 427# define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001 428# define SSL3_FLAGS_DELAY_CLIENT_FINISHED 0x0002 429# define SSL3_FLAGS_POP_BUFFER 0x0004 430# define TLS1_FLAGS_TLS_PADDING_BUG 0x0008 431# define TLS1_FLAGS_SKIP_CERT_VERIFY 0x0010 432# define TLS1_FLAGS_KEEP_HANDSHAKE 0x0020 433/* 434 * Set when the handshake is ready to process peer's ChangeCipherSpec message. 435 * Cleared after the message has been processed. 436 */ 437# define SSL3_FLAGS_CCS_OK 0x0080 438 439/* 440 * SSL3_FLAGS_SGC_RESTART_DONE is set when we restart a handshake because of 441 * MS SGC and so prevents us from restarting the handshake in a loop. It's 442 * reset on a renegotiation, so effectively limits the client to one restart 443 * per negotiation. This limits the possibility of a DDoS attack where the 444 * client handshakes in a loop using SGC to restart. Servers which permit 445 * renegotiation can still be effected, but we can't prevent that. 446 */ 447# define SSL3_FLAGS_SGC_RESTART_DONE 0x0040 448 449# ifndef OPENSSL_NO_SSL_INTERN 450 451typedef struct ssl3_state_st { 452 long flags; 453 int delay_buf_pop_ret; 454 unsigned char read_sequence[8]; 455 int read_mac_secret_size; 456 unsigned char read_mac_secret[EVP_MAX_MD_SIZE]; 457 unsigned char write_sequence[8]; 458 int write_mac_secret_size; 459 unsigned char write_mac_secret[EVP_MAX_MD_SIZE]; 460 unsigned char server_random[SSL3_RANDOM_SIZE]; 461 unsigned char client_random[SSL3_RANDOM_SIZE]; 462 /* flags for countermeasure against known-IV weakness */ 463 int need_empty_fragments; 464 int empty_fragment_done; 465 /* The value of 'extra' when the buffers were initialized */ 466 int init_extra; 467 SSL3_BUFFER rbuf; /* read IO goes into here */ 468 SSL3_BUFFER wbuf; /* write IO goes into here */ 469 SSL3_RECORD rrec; /* each decoded record goes in here */ 470 SSL3_RECORD wrec; /* goes out from here */ 471 /* 472 * storage for Alert/Handshake protocol data received but not yet 473 * processed by ssl3_read_bytes: 474 */ 475 unsigned char alert_fragment[2]; 476 unsigned int alert_fragment_len; 477 unsigned char handshake_fragment[4]; 478 unsigned int handshake_fragment_len; 479 /* partial write - check the numbers match */ 480 unsigned int wnum; /* number of bytes sent so far */ 481 int wpend_tot; /* number bytes written */ 482 int wpend_type; 483 int wpend_ret; /* number of bytes submitted */ 484 const unsigned char *wpend_buf; 485 /* used during startup, digest all incoming/outgoing packets */ 486 BIO *handshake_buffer; 487 /* 488 * When set of handshake digests is determined, buffer is hashed and 489 * freed and MD_CTX-es for all required digests are stored in this array 490 */ 491 EVP_MD_CTX **handshake_dgst; 492 /* 493 * Set whenever an expected ChangeCipherSpec message is processed. 494 * Unset when the peer's Finished message is received. 495 * Unexpected ChangeCipherSpec messages trigger a fatal alert. 496 */ 497 int change_cipher_spec; 498 int warn_alert; 499 int fatal_alert; 500 /* 501 * we allow one fatal and one warning alert to be outstanding, send close 502 * alert via the warning alert 503 */ 504 int alert_dispatch; 505 unsigned char send_alert[2]; 506 /* 507 * This flag is set when we should renegotiate ASAP, basically when there 508 * is no more data in the read or write buffers 509 */ 510 int renegotiate; 511 int total_renegotiations; 512 int num_renegotiations; 513 int in_read_app_data; 514 /* 515 * Opaque PRF input as used for the current handshake. These fields are 516 * used only if TLSEXT_TYPE_opaque_prf_input is defined (otherwise, they 517 * are merely present to improve binary compatibility) 518 */ 519 void *client_opaque_prf_input; 520 size_t client_opaque_prf_input_len; 521 void *server_opaque_prf_input; 522 size_t server_opaque_prf_input_len; 523 struct { 524 /* actually only needs to be 16+20 */ 525 unsigned char cert_verify_md[EVP_MAX_MD_SIZE * 2]; 526 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */ 527 unsigned char finish_md[EVP_MAX_MD_SIZE * 2]; 528 int finish_md_len; 529 unsigned char peer_finish_md[EVP_MAX_MD_SIZE * 2]; 530 int peer_finish_md_len; 531 unsigned long message_size; 532 int message_type; 533 /* used to hold the new cipher we are going to use */ 534 const SSL_CIPHER *new_cipher; 535# ifndef OPENSSL_NO_DH 536 DH *dh; 537# endif 538# ifndef OPENSSL_NO_ECDH 539 EC_KEY *ecdh; /* holds short lived ECDH key */ 540# endif 541 /* used when SSL_ST_FLUSH_DATA is entered */ 542 int next_state; 543 int reuse_message; 544 /* used for certificate requests */ 545 int cert_req; 546 int ctype_num; 547 char ctype[SSL3_CT_NUMBER]; 548 STACK_OF(X509_NAME) *ca_names; 549 int use_rsa_tmp; 550 int key_block_length; 551 unsigned char *key_block; 552 const EVP_CIPHER *new_sym_enc; 553 const EVP_MD *new_hash; 554 int new_mac_pkey_type; 555 int new_mac_secret_size; 556# ifndef OPENSSL_NO_COMP 557 const SSL_COMP *new_compression; 558# else 559 char *new_compression; 560# endif 561 int cert_request; 562 } tmp; 563 564 /* Connection binding to prevent renegotiation attacks */ 565 unsigned char previous_client_finished[EVP_MAX_MD_SIZE]; 566 unsigned char previous_client_finished_len; 567 unsigned char previous_server_finished[EVP_MAX_MD_SIZE]; 568 unsigned char previous_server_finished_len; 569 int send_connection_binding; /* TODOEKR */ 570 571# ifndef OPENSSL_NO_NEXTPROTONEG 572 /* 573 * Set if we saw the Next Protocol Negotiation extension from our peer. 574 */ 575 int next_proto_neg_seen; 576# endif 577 578# ifndef OPENSSL_NO_TLSEXT 579# ifndef OPENSSL_NO_EC 580 /* 581 * This is set to true if we believe that this is a version of Safari 582 * running on OS X 10.6 or newer. We wish to know this because Safari on 583 * 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. 584 */ 585 char is_probably_safari; 586# endif /* !OPENSSL_NO_EC */ 587# endif /* !OPENSSL_NO_TLSEXT */ 588} SSL3_STATE; 589 590# endif 591 592/* SSLv3 */ 593/* 594 * client 595 */ 596/* extra state */ 597# define SSL3_ST_CW_FLUSH (0x100|SSL_ST_CONNECT) 598# ifndef OPENSSL_NO_SCTP 599# define DTLS1_SCTP_ST_CW_WRITE_SOCK (0x310|SSL_ST_CONNECT) 600# define DTLS1_SCTP_ST_CR_READ_SOCK (0x320|SSL_ST_CONNECT) 601# endif 602/* write to server */ 603# define SSL3_ST_CW_CLNT_HELLO_A (0x110|SSL_ST_CONNECT) 604# define SSL3_ST_CW_CLNT_HELLO_B (0x111|SSL_ST_CONNECT) 605/* read from server */ 606# define SSL3_ST_CR_SRVR_HELLO_A (0x120|SSL_ST_CONNECT) 607# define SSL3_ST_CR_SRVR_HELLO_B (0x121|SSL_ST_CONNECT) 608# define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT) 609# define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT) 610# define SSL3_ST_CR_CERT_A (0x130|SSL_ST_CONNECT) 611# define SSL3_ST_CR_CERT_B (0x131|SSL_ST_CONNECT) 612# define SSL3_ST_CR_KEY_EXCH_A (0x140|SSL_ST_CONNECT) 613# define SSL3_ST_CR_KEY_EXCH_B (0x141|SSL_ST_CONNECT) 614# define SSL3_ST_CR_CERT_REQ_A (0x150|SSL_ST_CONNECT) 615# define SSL3_ST_CR_CERT_REQ_B (0x151|SSL_ST_CONNECT) 616# define SSL3_ST_CR_SRVR_DONE_A (0x160|SSL_ST_CONNECT) 617# define SSL3_ST_CR_SRVR_DONE_B (0x161|SSL_ST_CONNECT) 618/* write to server */ 619# define SSL3_ST_CW_CERT_A (0x170|SSL_ST_CONNECT) 620# define SSL3_ST_CW_CERT_B (0x171|SSL_ST_CONNECT) 621# define SSL3_ST_CW_CERT_C (0x172|SSL_ST_CONNECT) 622# define SSL3_ST_CW_CERT_D (0x173|SSL_ST_CONNECT) 623# define SSL3_ST_CW_KEY_EXCH_A (0x180|SSL_ST_CONNECT) 624# define SSL3_ST_CW_KEY_EXCH_B (0x181|SSL_ST_CONNECT) 625# define SSL3_ST_CW_CERT_VRFY_A (0x190|SSL_ST_CONNECT) 626# define SSL3_ST_CW_CERT_VRFY_B (0x191|SSL_ST_CONNECT) 627# define SSL3_ST_CW_CHANGE_A (0x1A0|SSL_ST_CONNECT) 628# define SSL3_ST_CW_CHANGE_B (0x1A1|SSL_ST_CONNECT) 629# ifndef OPENSSL_NO_NEXTPROTONEG 630# define SSL3_ST_CW_NEXT_PROTO_A (0x200|SSL_ST_CONNECT) 631# define SSL3_ST_CW_NEXT_PROTO_B (0x201|SSL_ST_CONNECT) 632# endif 633# define SSL3_ST_CW_FINISHED_A (0x1B0|SSL_ST_CONNECT) 634# define SSL3_ST_CW_FINISHED_B (0x1B1|SSL_ST_CONNECT) 635/* read from server */ 636# define SSL3_ST_CR_CHANGE_A (0x1C0|SSL_ST_CONNECT) 637# define SSL3_ST_CR_CHANGE_B (0x1C1|SSL_ST_CONNECT) 638# define SSL3_ST_CR_FINISHED_A (0x1D0|SSL_ST_CONNECT) 639# define SSL3_ST_CR_FINISHED_B (0x1D1|SSL_ST_CONNECT) 640# define SSL3_ST_CR_SESSION_TICKET_A (0x1E0|SSL_ST_CONNECT) 641# define SSL3_ST_CR_SESSION_TICKET_B (0x1E1|SSL_ST_CONNECT) 642# define SSL3_ST_CR_CERT_STATUS_A (0x1F0|SSL_ST_CONNECT) 643# define SSL3_ST_CR_CERT_STATUS_B (0x1F1|SSL_ST_CONNECT) 644 645/* server */ 646/* extra state */ 647# define SSL3_ST_SW_FLUSH (0x100|SSL_ST_ACCEPT) 648# ifndef OPENSSL_NO_SCTP 649# define DTLS1_SCTP_ST_SW_WRITE_SOCK (0x310|SSL_ST_ACCEPT) 650# define DTLS1_SCTP_ST_SR_READ_SOCK (0x320|SSL_ST_ACCEPT) 651# endif 652/* read from client */ 653/* Do not change the number values, they do matter */ 654# define SSL3_ST_SR_CLNT_HELLO_A (0x110|SSL_ST_ACCEPT) 655# define SSL3_ST_SR_CLNT_HELLO_B (0x111|SSL_ST_ACCEPT) 656# define SSL3_ST_SR_CLNT_HELLO_C (0x112|SSL_ST_ACCEPT) 657/* write to client */ 658# define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT) 659# define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT) 660# define SSL3_ST_SW_HELLO_REQ_A (0x120|SSL_ST_ACCEPT) 661# define SSL3_ST_SW_HELLO_REQ_B (0x121|SSL_ST_ACCEPT) 662# define SSL3_ST_SW_HELLO_REQ_C (0x122|SSL_ST_ACCEPT) 663# define SSL3_ST_SW_SRVR_HELLO_A (0x130|SSL_ST_ACCEPT) 664# define SSL3_ST_SW_SRVR_HELLO_B (0x131|SSL_ST_ACCEPT) 665# define SSL3_ST_SW_CERT_A (0x140|SSL_ST_ACCEPT) 666# define SSL3_ST_SW_CERT_B (0x141|SSL_ST_ACCEPT) 667# define SSL3_ST_SW_KEY_EXCH_A (0x150|SSL_ST_ACCEPT) 668# define SSL3_ST_SW_KEY_EXCH_B (0x151|SSL_ST_ACCEPT) 669# define SSL3_ST_SW_CERT_REQ_A (0x160|SSL_ST_ACCEPT) 670# define SSL3_ST_SW_CERT_REQ_B (0x161|SSL_ST_ACCEPT) 671# define SSL3_ST_SW_SRVR_DONE_A (0x170|SSL_ST_ACCEPT) 672# define SSL3_ST_SW_SRVR_DONE_B (0x171|SSL_ST_ACCEPT) 673/* read from client */ 674# define SSL3_ST_SR_CERT_A (0x180|SSL_ST_ACCEPT) 675# define SSL3_ST_SR_CERT_B (0x181|SSL_ST_ACCEPT) 676# define SSL3_ST_SR_KEY_EXCH_A (0x190|SSL_ST_ACCEPT) 677# define SSL3_ST_SR_KEY_EXCH_B (0x191|SSL_ST_ACCEPT) 678# define SSL3_ST_SR_CERT_VRFY_A (0x1A0|SSL_ST_ACCEPT) 679# define SSL3_ST_SR_CERT_VRFY_B (0x1A1|SSL_ST_ACCEPT) 680# define SSL3_ST_SR_CHANGE_A (0x1B0|SSL_ST_ACCEPT) 681# define SSL3_ST_SR_CHANGE_B (0x1B1|SSL_ST_ACCEPT) 682# ifndef OPENSSL_NO_NEXTPROTONEG 683# define SSL3_ST_SR_NEXT_PROTO_A (0x210|SSL_ST_ACCEPT) 684# define SSL3_ST_SR_NEXT_PROTO_B (0x211|SSL_ST_ACCEPT) 685# endif 686# define SSL3_ST_SR_FINISHED_A (0x1C0|SSL_ST_ACCEPT) 687# define SSL3_ST_SR_FINISHED_B (0x1C1|SSL_ST_ACCEPT) 688/* write to client */ 689# define SSL3_ST_SW_CHANGE_A (0x1D0|SSL_ST_ACCEPT) 690# define SSL3_ST_SW_CHANGE_B (0x1D1|SSL_ST_ACCEPT) 691# define SSL3_ST_SW_FINISHED_A (0x1E0|SSL_ST_ACCEPT) 692# define SSL3_ST_SW_FINISHED_B (0x1E1|SSL_ST_ACCEPT) 693# define SSL3_ST_SW_SESSION_TICKET_A (0x1F0|SSL_ST_ACCEPT) 694# define SSL3_ST_SW_SESSION_TICKET_B (0x1F1|SSL_ST_ACCEPT) 695# define SSL3_ST_SW_CERT_STATUS_A (0x200|SSL_ST_ACCEPT) 696# define SSL3_ST_SW_CERT_STATUS_B (0x201|SSL_ST_ACCEPT) 697 698# define SSL3_MT_HELLO_REQUEST 0 699# define SSL3_MT_CLIENT_HELLO 1 700# define SSL3_MT_SERVER_HELLO 2 701# define SSL3_MT_NEWSESSION_TICKET 4 702# define SSL3_MT_CERTIFICATE 11 703# define SSL3_MT_SERVER_KEY_EXCHANGE 12 704# define SSL3_MT_CERTIFICATE_REQUEST 13 705# define SSL3_MT_SERVER_DONE 14 706# define SSL3_MT_CERTIFICATE_VERIFY 15 707# define SSL3_MT_CLIENT_KEY_EXCHANGE 16 708# define SSL3_MT_FINISHED 20 709# define SSL3_MT_CERTIFICATE_STATUS 22 710# ifndef OPENSSL_NO_NEXTPROTONEG 711# define SSL3_MT_NEXT_PROTO 67 712# endif 713# define DTLS1_MT_HELLO_VERIFY_REQUEST 3 714 715# define SSL3_MT_CCS 1 716 717/* These are used when changing over to a new cipher */ 718# define SSL3_CC_READ 0x01 719# define SSL3_CC_WRITE 0x02 720# define SSL3_CC_CLIENT 0x10 721# define SSL3_CC_SERVER 0x20 722# define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE) 723# define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER|SSL3_CC_READ) 724# define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT|SSL3_CC_READ) 725# define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE) 726 727#ifdef __cplusplus 728} 729#endif 730#endif 731