crypto/external/bsd/openssl/dist/ssl/ssl3.h

   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
 128 extern "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
 366 typedef 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
 401 typedef 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
 451 typedef 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