ssl/s3_lib.c

   1 /* ssl/s3_lib.c */
   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 #include <stdio.h>
  60 #include <openssl/md5.h>
  61 #include <openssl/sha.h>
  62 #include <openssl/objects.h>
  63 #include "ssl_locl.h"
  64
  65 const char *ssl3_version_str="SSLv3" OPENSSL_VERSION_PTEXT;
  66
  67 #define SSL3_NUM_CIPHERS        (sizeof(ssl3_ciphers)/sizeof(SSL_CIPHER))
  68
  69 static long ssl3_default_timeout(void );
  70
  71 OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[]={
  72 /* The RSA ciphers */
  73 /* Cipher 01 */
  74         {
  75         1,
  76         SSL3_TXT_RSA_NULL_MD5,
  77         SSL3_CK_RSA_NULL_MD5,
  78         SSL_kRSA|SSL_aRSA|SSL_eNULL |SSL_MD5|SSL_SSLV3,
  79         SSL_NOT_EXP,
  80         0,
  81         0,
  82         0,
  83         SSL_ALL_CIPHERS,
  84         SSL_ALL_STRENGTHS,
  85         },
  86 /* Cipher 02 */
  87         {
  88         1,
  89         SSL3_TXT_RSA_NULL_SHA,
  90         SSL3_CK_RSA_NULL_SHA,
  91         SSL_kRSA|SSL_aRSA|SSL_eNULL |SSL_SHA1|SSL_SSLV3,
  92         SSL_NOT_EXP,
  93         0,
  94         0,
  95         0,
  96         SSL_ALL_CIPHERS,
  97         SSL_ALL_STRENGTHS,
  98         },
  99
 100 /* anon DH */
 101 /* Cipher 17 */
 102         {
 103         1,
 104         SSL3_TXT_ADH_RC4_40_MD5,
 105         SSL3_CK_ADH_RC4_40_MD5,
 106         SSL_kEDH |SSL_aNULL|SSL_RC4  |SSL_MD5 |SSL_SSLV3,
 107         SSL_EXPORT|SSL_EXP40,
 108         0,
 109         40,
 110         128,
 111         SSL_ALL_CIPHERS,
 112         SSL_ALL_STRENGTHS,
 113         },
 114 /* Cipher 18 */
 115         {
 116         1,
 117         SSL3_TXT_ADH_RC4_128_MD5,
 118         SSL3_CK_ADH_RC4_128_MD5,
 119         SSL_kEDH |SSL_aNULL|SSL_RC4  |SSL_MD5 |SSL_SSLV3,
 120         SSL_NOT_EXP,
 121         0,
 122         128,
 123         128,
 124         SSL_ALL_CIPHERS,
 125         SSL_ALL_STRENGTHS,
 126         },
 127 /* Cipher 19 */
 128         {
 129         1,
 130         SSL3_TXT_ADH_DES_40_CBC_SHA,
 131         SSL3_CK_ADH_DES_40_CBC_SHA,
 132         SSL_kEDH |SSL_aNULL|SSL_DES|SSL_SHA1|SSL_SSLV3,
 133         SSL_EXPORT|SSL_EXP40,
 134         0,
 135         40,
 136         128,
 137         SSL_ALL_CIPHERS,
 138         SSL_ALL_STRENGTHS,
 139         },
 140 /* Cipher 1A */
 141         {
 142         1,
 143         SSL3_TXT_ADH_DES_64_CBC_SHA,
 144         SSL3_CK_ADH_DES_64_CBC_SHA,
 145         SSL_kEDH |SSL_aNULL|SSL_DES  |SSL_SHA1|SSL_SSLV3,
 146         SSL_NOT_EXP,
 147         0,
 148         56,
 149         56,
 150         SSL_ALL_CIPHERS,
 151         SSL_ALL_STRENGTHS,
 152         },
 153 /* Cipher 1B */
 154         {
 155         1,
 156         SSL3_TXT_ADH_DES_192_CBC_SHA,
 157         SSL3_CK_ADH_DES_192_CBC_SHA,
 158         SSL_kEDH |SSL_aNULL|SSL_3DES |SSL_SHA1|SSL_SSLV3,
 159         SSL_NOT_EXP,
 160         0,
 161         168,
 162         168,
 163         SSL_ALL_CIPHERS,
 164         SSL_ALL_STRENGTHS,
 165         },
 166
 167 /* RSA again */
 168 /* Cipher 03 */
 169         {
 170         1,
 171         SSL3_TXT_RSA_RC4_40_MD5,
 172         SSL3_CK_RSA_RC4_40_MD5,
 173         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_MD5 |SSL_SSLV3,
 174         SSL_EXPORT|SSL_EXP40,
 175         0,
 176         40,
 177         128,
 178         SSL_ALL_CIPHERS,
 179         SSL_ALL_STRENGTHS,
 180         },
 181 /* Cipher 04 */
 182         {
 183         1,
 184         SSL3_TXT_RSA_RC4_128_MD5,
 185         SSL3_CK_RSA_RC4_128_MD5,
 186         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_MD5|SSL_SSLV3,
 187         SSL_NOT_EXP|SSL_MEDIUM,
 188         0,
 189         128,
 190         128,
 191         SSL_ALL_CIPHERS,
 192         SSL_ALL_STRENGTHS,
 193         },
 194 /* Cipher 05 */
 195         {
 196         1,
 197         SSL3_TXT_RSA_RC4_128_SHA,
 198         SSL3_CK_RSA_RC4_128_SHA,
 199         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_SHA1|SSL_SSLV3,
 200         SSL_NOT_EXP|SSL_MEDIUM,
 201         0,
 202         128,
 203         128,
 204         SSL_ALL_CIPHERS,
 205         SSL_ALL_STRENGTHS,
 206         },
 207 /* Cipher 06 */
 208         {
 209         1,
 210         SSL3_TXT_RSA_RC2_40_MD5,
 211         SSL3_CK_RSA_RC2_40_MD5,
 212         SSL_kRSA|SSL_aRSA|SSL_RC2  |SSL_MD5 |SSL_SSLV3,
 213         SSL_EXPORT|SSL_EXP40,
 214         0,
 215         40,
 216         128,
 217         SSL_ALL_CIPHERS,
 218         SSL_ALL_STRENGTHS,
 219         },
 220 /* Cipher 07 */
 221         {
 222         1,
 223         SSL3_TXT_RSA_IDEA_128_SHA,
 224         SSL3_CK_RSA_IDEA_128_SHA,
 225         SSL_kRSA|SSL_aRSA|SSL_IDEA |SSL_SHA1|SSL_SSLV3,
 226         SSL_NOT_EXP|SSL_MEDIUM,
 227         0,
 228         128,
 229         128,
 230         SSL_ALL_CIPHERS,
 231         SSL_ALL_STRENGTHS,
 232         },
 233 /* Cipher 08 */
 234         {
 235         1,
 236         SSL3_TXT_RSA_DES_40_CBC_SHA,
 237         SSL3_CK_RSA_DES_40_CBC_SHA,
 238         SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1|SSL_SSLV3,
 239         SSL_EXPORT|SSL_EXP40,
 240         0,
 241         40,
 242         56,
 243         SSL_ALL_CIPHERS,
 244         SSL_ALL_STRENGTHS,
 245         },
 246 /* Cipher 09 */
 247         {
 248         1,
 249         SSL3_TXT_RSA_DES_64_CBC_SHA,
 250         SSL3_CK_RSA_DES_64_CBC_SHA,
 251         SSL_kRSA|SSL_aRSA|SSL_DES  |SSL_SHA1|SSL_SSLV3,
 252         SSL_NOT_EXP|SSL_LOW,
 253         0,
 254         56,
 255         56,
 256         SSL_ALL_CIPHERS,
 257         SSL_ALL_STRENGTHS,
 258         },
 259 /* Cipher 0A */
 260         {
 261         1,
 262         SSL3_TXT_RSA_DES_192_CBC3_SHA,
 263         SSL3_CK_RSA_DES_192_CBC3_SHA,
 264         SSL_kRSA|SSL_aRSA|SSL_3DES |SSL_SHA1|SSL_SSLV3,
 265         SSL_NOT_EXP|SSL_HIGH,
 266         0,
 267         168,
 268         168,
 269         SSL_ALL_CIPHERS,
 270         SSL_ALL_STRENGTHS,
 271         },
 272
 273 /*  The DH ciphers */
 274 /* Cipher 0B */
 275         {
 276         0,
 277         SSL3_TXT_DH_DSS_DES_40_CBC_SHA,
 278         SSL3_CK_DH_DSS_DES_40_CBC_SHA,
 279         SSL_kDHd |SSL_aDH|SSL_DES|SSL_SHA1|SSL_SSLV3,
 280         SSL_EXPORT|SSL_EXP40,
 281         0,
 282         40,
 283         56,
 284         SSL_ALL_CIPHERS,
 285         SSL_ALL_STRENGTHS,
 286         },
 287 /* Cipher 0C */
 288         {
 289         0,
 290         SSL3_TXT_DH_DSS_DES_64_CBC_SHA,
 291         SSL3_CK_DH_DSS_DES_64_CBC_SHA,
 292         SSL_kDHd |SSL_aDH|SSL_DES  |SSL_SHA1|SSL_SSLV3,
 293         SSL_NOT_EXP|SSL_LOW,
 294         0,
 295         56,
 296         56,
 297         SSL_ALL_CIPHERS,
 298         SSL_ALL_STRENGTHS,
 299         },
 300 /* Cipher 0D */
 301         {
 302         0,
 303         SSL3_TXT_DH_DSS_DES_192_CBC3_SHA,
 304         SSL3_CK_DH_DSS_DES_192_CBC3_SHA,
 305         SSL_kDHd |SSL_aDH|SSL_3DES |SSL_SHA1|SSL_SSLV3,
 306         SSL_NOT_EXP|SSL_HIGH,
 307         0,
 308         168,
 309         168,
 310         SSL_ALL_CIPHERS,
 311         SSL_ALL_STRENGTHS,
 312         },
 313 /* Cipher 0E */
 314         {
 315         0,
 316         SSL3_TXT_DH_RSA_DES_40_CBC_SHA,
 317         SSL3_CK_DH_RSA_DES_40_CBC_SHA,
 318         SSL_kDHr |SSL_aDH|SSL_DES|SSL_SHA1|SSL_SSLV3,
 319         SSL_EXPORT|SSL_EXP40,
 320         0,
 321         40,
 322         56,
 323         SSL_ALL_CIPHERS,
 324         SSL_ALL_STRENGTHS,
 325         },
 326 /* Cipher 0F */
 327         {
 328         0,
 329         SSL3_TXT_DH_RSA_DES_64_CBC_SHA,
 330         SSL3_CK_DH_RSA_DES_64_CBC_SHA,
 331         SSL_kDHr |SSL_aDH|SSL_DES  |SSL_SHA1|SSL_SSLV3,
 332         SSL_NOT_EXP|SSL_LOW,
 333         0,
 334         56,
 335         56,
 336         SSL_ALL_CIPHERS,
 337         SSL_ALL_STRENGTHS,
 338         },
 339 /* Cipher 10 */
 340         {
 341         0,
 342         SSL3_TXT_DH_RSA_DES_192_CBC3_SHA,
 343         SSL3_CK_DH_RSA_DES_192_CBC3_SHA,
 344         SSL_kDHr |SSL_aDH|SSL_3DES |SSL_SHA1|SSL_SSLV3,
 345         SSL_NOT_EXP|SSL_HIGH,
 346         0,
 347         168,
 348         168,
 349         SSL_ALL_CIPHERS,
 350         SSL_ALL_STRENGTHS,
 351         },
 352
 353 /* The Ephemeral DH ciphers */
 354 /* Cipher 11 */
 355         {
 356         1,
 357         SSL3_TXT_EDH_DSS_DES_40_CBC_SHA,
 358         SSL3_CK_EDH_DSS_DES_40_CBC_SHA,
 359         SSL_kEDH|SSL_aDSS|SSL_DES|SSL_SHA1|SSL_SSLV3,
 360         SSL_EXPORT|SSL_EXP40,
 361         0,
 362         40,
 363         56,
 364         SSL_ALL_CIPHERS,
 365         SSL_ALL_STRENGTHS,
 366         },
 367 /* Cipher 12 */
 368         {
 369         1,
 370         SSL3_TXT_EDH_DSS_DES_64_CBC_SHA,
 371         SSL3_CK_EDH_DSS_DES_64_CBC_SHA,
 372         SSL_kEDH|SSL_aDSS|SSL_DES  |SSL_SHA1|SSL_SSLV3,
 373         SSL_NOT_EXP|SSL_LOW,
 374         0,
 375         56,
 376         56,
 377         SSL_ALL_CIPHERS,
 378         SSL_ALL_STRENGTHS,
 379         },
 380 /* Cipher 13 */
 381         {
 382         1,
 383         SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA,
 384         SSL3_CK_EDH_DSS_DES_192_CBC3_SHA,
 385         SSL_kEDH|SSL_aDSS|SSL_3DES |SSL_SHA1|SSL_SSLV3,
 386         SSL_NOT_EXP|SSL_HIGH,
 387         0,
 388         168,
 389         168,
 390         SSL_ALL_CIPHERS,
 391         SSL_ALL_STRENGTHS,
 392         },
 393 /* Cipher 14 */
 394         {
 395         1,
 396         SSL3_TXT_EDH_RSA_DES_40_CBC_SHA,
 397         SSL3_CK_EDH_RSA_DES_40_CBC_SHA,
 398         SSL_kEDH|SSL_aRSA|SSL_DES|SSL_SHA1|SSL_SSLV3,
 399         SSL_EXPORT|SSL_EXP40,
 400         0,
 401         40,
 402         56,
 403         SSL_ALL_CIPHERS,
 404         SSL_ALL_STRENGTHS,
 405         },
 406 /* Cipher 15 */
 407         {
 408         1,
 409         SSL3_TXT_EDH_RSA_DES_64_CBC_SHA,
 410         SSL3_CK_EDH_RSA_DES_64_CBC_SHA,
 411         SSL_kEDH|SSL_aRSA|SSL_DES  |SSL_SHA1|SSL_SSLV3,
 412         SSL_NOT_EXP|SSL_LOW,
 413         0,
 414         56,
 415         56,
 416         SSL_ALL_CIPHERS,
 417         SSL_ALL_STRENGTHS,
 418         },
 419 /* Cipher 16 */
 420         {
 421         1,
 422         SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA,
 423         SSL3_CK_EDH_RSA_DES_192_CBC3_SHA,
 424         SSL_kEDH|SSL_aRSA|SSL_3DES |SSL_SHA1|SSL_SSLV3,
 425         SSL_NOT_EXP|SSL_HIGH,
 426         0,
 427         168,
 428         168,
 429         SSL_ALL_CIPHERS,
 430         SSL_ALL_STRENGTHS,
 431         },
 432
 433 /* Fortezza */
 434 /* Cipher 1C */
 435         {
 436         0,
 437         SSL3_TXT_FZA_DMS_NULL_SHA,
 438         SSL3_CK_FZA_DMS_NULL_SHA,
 439         SSL_kFZA|SSL_aFZA |SSL_eNULL |SSL_SHA1|SSL_SSLV3,
 440         SSL_NOT_EXP,
 441         0,
 442         0,
 443         0,
 444         SSL_ALL_CIPHERS,
 445         SSL_ALL_STRENGTHS,
 446         },
 447
 448 /* Cipher 1D */
 449         {
 450         0,
 451         SSL3_TXT_FZA_DMS_FZA_SHA,
 452         SSL3_CK_FZA_DMS_FZA_SHA,
 453         SSL_kFZA|SSL_aFZA |SSL_eFZA |SSL_SHA1|SSL_SSLV3,
 454         SSL_NOT_EXP,
 455         0,
 456         0,
 457         0,
 458         SSL_ALL_CIPHERS,
 459         SSL_ALL_STRENGTHS,
 460         },
 461
 462 /* Cipher 1E */
 463         {
 464         0,
 465         SSL3_TXT_FZA_DMS_RC4_SHA,
 466         SSL3_CK_FZA_DMS_RC4_SHA,
 467         SSL_kFZA|SSL_aFZA |SSL_RC4  |SSL_SHA1|SSL_SSLV3,
 468         SSL_NOT_EXP,
 469         0,
 470         128,
 471         128,
 472         SSL_ALL_CIPHERS,
 473         SSL_ALL_STRENGTHS,
 474         },
 475
 476 #if TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES
 477         /* New TLS Export CipherSuites */
 478         /* Cipher 60 */
 479             {
 480             1,
 481             TLS1_TXT_RSA_EXPORT1024_WITH_RC4_56_MD5,
 482             TLS1_CK_RSA_EXPORT1024_WITH_RC4_56_MD5,
 483             SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_TLSV1,
 484             SSL_EXPORT|SSL_EXP56,
 485             0,
 486             56,
 487             128,
 488             SSL_ALL_CIPHERS,
 489             SSL_ALL_STRENGTHS,
 490             },
 491         /* Cipher 61 */
 492             {
 493             1,
 494             TLS1_TXT_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5,
 495             TLS1_CK_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5,
 496             SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_TLSV1,
 497             SSL_EXPORT|SSL_EXP56,
 498             0,
 499             56,
 500             128,
 501             SSL_ALL_CIPHERS,
 502             SSL_ALL_STRENGTHS,
 503             },
 504         /* Cipher 62 */
 505             {
 506             1,
 507             TLS1_TXT_RSA_EXPORT1024_WITH_DES_CBC_SHA,
 508             TLS1_CK_RSA_EXPORT1024_WITH_DES_CBC_SHA,
 509             SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA|SSL_TLSV1,
 510             SSL_EXPORT|SSL_EXP56,
 511             0,
 512             56,
 513             56,
 514             SSL_ALL_CIPHERS,
 515             SSL_ALL_STRENGTHS,
 516             },
 517         /* Cipher 63 */
 518             {
 519             1,
 520             TLS1_TXT_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA,
 521             TLS1_CK_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA,
 522             SSL_kEDH|SSL_aDSS|SSL_DES|SSL_SHA|SSL_TLSV1,
 523             SSL_EXPORT|SSL_EXP56,
 524             0,
 525             56,
 526             56,
 527             SSL_ALL_CIPHERS,
 528             SSL_ALL_STRENGTHS,
 529             },
 530         /* Cipher 64 */
 531             {
 532             1,
 533             TLS1_TXT_RSA_EXPORT1024_WITH_RC4_56_SHA,
 534             TLS1_CK_RSA_EXPORT1024_WITH_RC4_56_SHA,
 535             SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA|SSL_TLSV1,
 536             SSL_EXPORT|SSL_EXP56,
 537             0,
 538             56,
 539             128,
 540             SSL_ALL_CIPHERS,
 541             SSL_ALL_STRENGTHS,
 542             },
 543         /* Cipher 65 */
 544             {
 545             1,
 546             TLS1_TXT_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA,
 547             TLS1_CK_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA,
 548             SSL_kEDH|SSL_aDSS|SSL_RC4|SSL_SHA|SSL_TLSV1,
 549             SSL_EXPORT|SSL_EXP56,
 550             0,
 551             56,
 552             128,
 553             SSL_ALL_CIPHERS,
 554             SSL_ALL_STRENGTHS,
 555             },
 556         /* Cipher 66 */
 557             {
 558             1,
 559             TLS1_TXT_DHE_DSS_WITH_RC4_128_SHA,
 560             TLS1_CK_DHE_DSS_WITH_RC4_128_SHA,
 561             SSL_kEDH|SSL_aDSS|SSL_RC4|SSL_SHA|SSL_TLSV1,
 562             SSL_NOT_EXP,
 563             0,
 564             128,
 565             128,
 566             SSL_ALL_CIPHERS,
 567             SSL_ALL_STRENGTHS
 568             },
 569 #endif
 570
 571 /* end of list */
 572         };
 573
 574 static SSL3_ENC_METHOD SSLv3_enc_data={
 575         ssl3_enc,
 576         ssl3_mac,
 577         ssl3_setup_key_block,
 578         ssl3_generate_master_secret,
 579         ssl3_change_cipher_state,
 580         ssl3_final_finish_mac,
 581         MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
 582         ssl3_cert_verify_mac,
 583         SSL3_MD_CLIENT_FINISHED_CONST,4,
 584         SSL3_MD_SERVER_FINISHED_CONST,4,
 585         ssl3_alert_code,
 586         };
 587
 588 static SSL_METHOD SSLv3_data= {
 589         SSL3_VERSION,
 590         ssl3_new,
 591         ssl3_clear,
 592         ssl3_free,
 593         ssl_undefined_function,
 594         ssl_undefined_function,
 595         ssl3_read,
 596         ssl3_peek,
 597         ssl3_write,
 598         ssl3_shutdown,
 599         ssl3_renegotiate,
 600         ssl3_renegotiate_check,
 601         ssl3_ctrl,
 602         ssl3_ctx_ctrl,
 603         ssl3_get_cipher_by_char,
 604         ssl3_put_cipher_by_char,
 605         ssl3_pending,
 606         ssl3_num_ciphers,
 607         ssl3_get_cipher,
 608         ssl_bad_method,
 609         ssl3_default_timeout,
 610         &SSLv3_enc_data,
 611         };
 612
 613 union rsa_fn_to_char_u
 614         {
 615         char *char_p;
 616         RSA *(*fn_p)(SSL *, int, int);
 617         };
 618
 619 union dh_fn_to_char_u
 620         {
 621         char *char_p;
 622         DH *(*fn_p)(SSL *, int, int);
 623         };
 624
 625 static long ssl3_default_timeout(void)
 626         {
 627         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
 628          * is way too long for http, the cache would over fill */
 629         return(60*60*2);
 630         }
 631
 632 SSL_METHOD *sslv3_base_method(void)
 633         {
 634         return(&SSLv3_data);
 635         }
 636
 637 int ssl3_num_ciphers(void)
 638         {
 639         return(SSL3_NUM_CIPHERS);
 640         }
 641
 642 SSL_CIPHER *ssl3_get_cipher(unsigned int u)
 643         {
 644         if (u < SSL3_NUM_CIPHERS)
 645                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
 646         else
 647                 return(NULL);
 648         }
 649
 650 /* The problem is that it may not be the correct record type */
 651 int ssl3_pending(SSL *s)
 652         {
 653         return(s->s3->rrec.length);
 654         }
 655
 656 int ssl3_new(SSL *s)
 657         {
 658         SSL3_CTX *s3;
 659
 660         if ((s3=(SSL3_CTX *)Malloc(sizeof(SSL3_CTX))) == NULL) goto err;
 661         memset(s3,0,sizeof(SSL3_CTX));
 662
 663         s->s3=s3;
 664         /*
 665         s->s3->tmp.ca_names=NULL;
 666         s->s3->tmp.key_block=NULL;
 667         s->s3->tmp.key_block_length=0;
 668         s->s3->rbuf.buf=NULL;
 669         s->s3->wbuf.buf=NULL;
 670         */
 671
 672         s->method->ssl_clear(s);
 673         return(1);
 674 err:
 675         return(0);
 676         }
 677
 678 void ssl3_free(SSL *s)
 679         {
 680         if(s == NULL)
 681             return;
 682
 683         ssl3_cleanup_key_block(s);
 684         if (s->s3->rbuf.buf != NULL)
 685                 Free(s->s3->rbuf.buf);
 686         if (s->s3->wbuf.buf != NULL)
 687                 Free(s->s3->wbuf.buf);
 688         if (s->s3->rrec.comp != NULL)
 689                 Free(s->s3->rrec.comp);
 690 #ifndef NO_DH
 691         if (s->s3->tmp.dh != NULL)
 692                 DH_free(s->s3->tmp.dh);
 693 #endif
 694         if (s->s3->tmp.ca_names != NULL)
 695                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 696         memset(s->s3,0,sizeof(SSL3_CTX));
 697         Free(s->s3);
 698         s->s3=NULL;
 699         }
 700
 701 void ssl3_clear(SSL *s)
 702         {
 703         unsigned char *rp,*wp;
 704
 705         ssl3_cleanup_key_block(s);
 706         if (s->s3->tmp.ca_names != NULL)
 707                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 708
 709         if (s->s3->rrec.comp != NULL)
 710                 {
 711                 Free(s->s3->rrec.comp);
 712                 s->s3->rrec.comp=NULL;
 713                 }
 714
 715         rp=s->s3->rbuf.buf;
 716         wp=s->s3->wbuf.buf;
 717
 718         memset(s->s3,0,sizeof(SSL3_CTX));
 719         if (rp != NULL) s->s3->rbuf.buf=rp;
 720         if (wp != NULL) s->s3->wbuf.buf=wp;
 721
 722         ssl_free_wbio_buffer(s);
 723
 724         s->packet_length=0;
 725         s->s3->renegotiate=0;
 726         s->s3->total_renegotiations=0;
 727         s->s3->num_renegotiations=0;
 728         s->s3->in_read_app_data=0;
 729         s->version=SSL3_VERSION;
 730         }
 731
 732 long ssl3_ctrl(SSL *s, int cmd, long larg, char *parg)
 733         {
 734         int ret=0;
 735
 736 #if !defined(NO_DSA) || !defined(NO_RSA)
 737         if (
 738 #ifndef NO_RSA
 739             cmd == SSL_CTRL_SET_TMP_RSA ||
 740             cmd == SSL_CTRL_SET_TMP_RSA_CB ||
 741 #endif
 742 #ifndef NO_DSA
 743             cmd == SSL_CTRL_SET_TMP_DH ||
 744             cmd == SSL_CTRL_SET_TMP_DH_CB ||
 745 #endif
 746                 0)
 747                 {
 748                 if (!ssl_cert_inst(&s->cert))
 749                         {
 750                         SSLerr(SSL_F_SSL3_CTRL, ERR_R_MALLOC_FAILURE);
 751                         return(0);
 752                         }
 753                 }
 754 #endif
 755
 756         switch (cmd)
 757                 {
 758         case SSL_CTRL_GET_SESSION_REUSED:
 759                 ret=s->hit;
 760                 break;
 761         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 762                 break;
 763         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 764                 ret=s->s3->num_renegotiations;
 765                 break;
 766         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 767                 ret=s->s3->num_renegotiations;
 768                 s->s3->num_renegotiations=0;
 769                 break;
 770         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 771                 ret=s->s3->total_renegotiations;
 772                 break;
 773         case SSL_CTRL_GET_FLAGS:
 774                 ret=(int)(s->s3->flags);
 775                 break;
 776 #ifndef NO_RSA
 777         case SSL_CTRL_NEED_TMP_RSA:
 778                 if ((s->cert != NULL) && (s->cert->rsa_tmp == NULL) &&
 779                     ((s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 780                      (EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8))))
 781                         ret = 1;
 782                 break;
 783         case SSL_CTRL_SET_TMP_RSA:
 784                 {
 785                         RSA *rsa = (RSA *)parg;
 786                         if (rsa == NULL) {
 787                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 788                                 return(ret);
 789                         }
 790                         if ((rsa = RSAPrivateKey_dup(rsa)) == NULL) {
 791                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_RSA_LIB);
 792                                 return(ret);
 793                         }
 794                         if (s->cert->rsa_tmp != NULL)
 795                                 RSA_free(s->cert->rsa_tmp);
 796                         s->cert->rsa_tmp = rsa;
 797                         ret = 1;
 798                 }
 799                 break;
 800         case SSL_CTRL_SET_TMP_RSA_CB:
 801                 {
 802                 union rsa_fn_to_char_u rsa_tmp_cb;
 803
 804                 rsa_tmp_cb.char_p = parg;
 805                 s->cert->rsa_tmp_cb = rsa_tmp_cb.fn_p;
 806                 }
 807                 break;
 808 #endif
 809 #ifndef NO_DH
 810         case SSL_CTRL_SET_TMP_DH:
 811                 {
 812                         DH *dh = (DH *)parg;
 813                         if (dh == NULL) {
 814                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 815                                 return(ret);
 816                         }
 817                         if ((dh = DHparams_dup(dh)) == NULL) {
 818                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_DH_LIB);
 819                                 return(ret);
 820                         }
 821                         if (!DH_generate_key(dh)) {
 822                                 DH_free(dh);
 823                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_DH_LIB);
 824                                 return(ret);
 825                         }
 826                         if (s->cert->dh_tmp != NULL)
 827                                 DH_free(s->cert->dh_tmp);
 828                         s->cert->dh_tmp = dh;
 829                         ret = 1;
 830                 }
 831                 break;
 832         case SSL_CTRL_SET_TMP_DH_CB:
 833                 {
 834                 union dh_fn_to_char_u dh_tmp_cb;
 835
 836                 dh_tmp_cb.char_p = parg;
 837                 s->cert->dh_tmp_cb = dh_tmp_cb.fn_p;
 838                 }
 839                 break;
 840 #endif
 841         default:
 842                 break;
 843                 }
 844         return(ret);
 845         }
 846
 847 long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, char *parg)
 848         {
 849         CERT *cert;
 850
 851         cert=ctx->cert;
 852
 853         switch (cmd)
 854                 {
 855 #ifndef NO_RSA
 856         case SSL_CTRL_NEED_TMP_RSA:
 857                 if (    (cert->rsa_tmp == NULL) &&
 858                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 859                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 860                         )
 861                         return(1);
 862                 else
 863                         return(0);
 864                 /* break; */
 865         case SSL_CTRL_SET_TMP_RSA:
 866                 {
 867                 RSA *rsa;
 868                 int i;
 869
 870                 rsa=(RSA *)parg;
 871                 i=1;
 872                 if (rsa == NULL)
 873                         i=0;
 874                 else
 875                         {
 876                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 877                                 i=0;
 878                         }
 879                 if (!i)
 880                         {
 881                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 882                         return(0);
 883                         }
 884                 else
 885                         {
 886                         if (cert->rsa_tmp != NULL)
 887                                 RSA_free(cert->rsa_tmp);
 888                         cert->rsa_tmp=rsa;
 889                         return(1);
 890                         }
 891                 }
 892                 /* break; */
 893         case SSL_CTRL_SET_TMP_RSA_CB:
 894                 {
 895                 union rsa_fn_to_char_u rsa_tmp_cb;
 896
 897                 rsa_tmp_cb.char_p = parg;
 898                 cert->rsa_tmp_cb = rsa_tmp_cb.fn_p;
 899                 }
 900                 break;
 901 #endif
 902 #ifndef NO_DH
 903         case SSL_CTRL_SET_TMP_DH:
 904                 {
 905                 DH *new=NULL,*dh;
 906                 int rret=0;
 907
 908                 dh=(DH *)parg;
 909                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 910                         (!DH_generate_key(new)))
 911                         {
 912                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 913                         if (new != NULL) DH_free(new);
 914                         }
 915                 else
 916                         {
 917                         if (cert->dh_tmp != NULL)
 918                                 DH_free(cert->dh_tmp);
 919                         cert->dh_tmp=new;
 920                         rret=1;
 921                         }
 922                 return(rret);
 923                 }
 924                 /*break; */
 925         case SSL_CTRL_SET_TMP_DH_CB:
 926                 {
 927                 union dh_fn_to_char_u dh_tmp_cb;
 928
 929                 dh_tmp_cb.char_p = parg;
 930                 cert->dh_tmp_cb = dh_tmp_cb.fn_p;
 931                 }
 932                 break;
 933 #endif
 934         /* A Thawte special :-) */
 935         case SSL_CTRL_EXTRA_CHAIN_CERT:
 936                 if (ctx->extra_certs == NULL)
 937                         {
 938                         if ((ctx->extra_certs=sk_X509_new_null()) == NULL)
 939                                 return(0);
 940                         }
 941                 sk_X509_push(ctx->extra_certs,(X509 *)parg);
 942                 break;
 943
 944         default:
 945                 return(0);
 946                 }
 947         return(1);
 948         }
 949
 950 /* This function needs to check if the ciphers required are actually
 951  * available */
 952 SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p)
 953         {
 954         static int init=1;
 955         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
 956         SSL_CIPHER c,*cp= &c,**cpp;
 957         unsigned long id;
 958         int i;
 959
 960         if (init)
 961                 {
 962                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 963
 964                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
 965                         sorted[i]= &(ssl3_ciphers[i]);
 966
 967                 qsort(  (char *)sorted,
 968                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 969                         FP_ICC ssl_cipher_ptr_id_cmp);
 970
 971                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 972
 973                 init=0;
 974                 }
 975
 976         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
 977         c.id=id;
 978         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 979                 (char *)sorted,
 980                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 981                 (int (*)())ssl_cipher_ptr_id_cmp);
 982         if ((cpp == NULL) || !(*cpp)->valid)
 983                 return(NULL);
 984         else
 985                 return(*cpp);
 986         }
 987
 988 int ssl3_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
 989         {
 990         long l;
 991
 992         if (p != NULL)
 993                 {
 994                 l=c->id;
 995                 if ((l & 0xff000000) != 0x03000000) return(0);
 996                 p[0]=((unsigned char)(l>> 8L))&0xFF;
 997                 p[1]=((unsigned char)(l     ))&0xFF;
 998                 }
 999         return(2);
1000         }
1001
1002 int ssl3_part_read(SSL *s, int i)
1003         {
1004         s->rwstate=SSL_READING;
1005
1006         if (i < 0)
1007                 {
1008                 return(i);
1009                 }
1010         else
1011                 {
1012                 s->init_num+=i;
1013                 return(0);
1014                 }
1015         }
1016
1017 SSL_CIPHER *ssl3_choose_cipher(SSL *s, STACK_OF(SSL_CIPHER) *have,
1018              STACK_OF(SSL_CIPHER) *pref)
1019         {
1020         SSL_CIPHER *c,*ret=NULL;
1021         int i,j,ok;
1022         CERT *cert;
1023         unsigned long alg,mask,emask;
1024
1025         /* Let's see which ciphers we can support */
1026         cert=s->cert;
1027
1028         sk_SSL_CIPHER_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
1029
1030 #ifdef CIPHER_DEBUG
1031         printf("Have:\n");
1032         for(i=0 ; i < sk_num(pref) ; ++i)
1033             {
1034             c=(SSL_CIPHER *)sk_value(pref,i);
1035             printf("%p:%s\n",c,c->name);
1036             }
1037 #endif
1038
1039         for (i=0; i<sk_SSL_CIPHER_num(have); i++)
1040                 {
1041                 c=sk_SSL_CIPHER_value(have,i);
1042
1043                 ssl_set_cert_masks(cert,c);
1044                 mask=cert->mask;
1045                 emask=cert->export_mask;
1046
1047                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1048                 if (SSL_C_IS_EXPORT(c))
1049                         {
1050                         ok=((alg & emask) == alg)?1:0;
1051 #ifdef CIPHER_DEBUG
1052                         printf("%d:[%08lX:%08lX]%p:%s (export)\n",ok,alg,emask,
1053                                c,c->name);
1054 #endif
1055                         }
1056                 else
1057                         {
1058                         ok=((alg & mask) == alg)?1:0;
1059 #ifdef CIPHER_DEBUG
1060                         printf("%d:[%08lX:%08lX]%p:%s\n",ok,alg,mask,c,
1061                                c->name);
1062 #endif
1063                         }
1064
1065                 if (!ok) continue;
1066
1067                 j=sk_SSL_CIPHER_find(pref,c);
1068                 if (j >= 0)
1069                         {
1070                         ret=sk_SSL_CIPHER_value(pref,j);
1071                         break;
1072                         }
1073                 }
1074         return(ret);
1075         }
1076
1077 int ssl3_get_req_cert_type(SSL *s, unsigned char *p)
1078         {
1079         int ret=0;
1080         unsigned long alg;
1081
1082         alg=s->s3->tmp.new_cipher->algorithms;
1083
1084 #ifndef NO_DH
1085         if (alg & (SSL_kDHr|SSL_kEDH))
1086                 {
1087 #  ifndef NO_RSA
1088                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
1089 #  endif
1090 #  ifndef NO_DSA
1091                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
1092 #  endif
1093                 }
1094         if ((s->version == SSL3_VERSION) &&
1095                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
1096                 {
1097 #  ifndef NO_RSA
1098                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
1099 #  endif
1100 #  ifndef NO_DSA
1101                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
1102 #  endif
1103                 }
1104 #endif /* !NO_DH */
1105 #ifndef NO_RSA
1106         p[ret++]=SSL3_CT_RSA_SIGN;
1107 #endif
1108 #ifndef NO_DSA
1109         p[ret++]=SSL3_CT_DSS_SIGN;
1110 #endif
1111         return(ret);
1112         }
1113
1114 int ssl3_shutdown(SSL *s)
1115         {
1116
1117         /* Don't do anything much if we have not done the handshake or
1118          * we don't want to send messages :-) */
1119         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
1120                 {
1121                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
1122                 return(1);
1123                 }
1124
1125         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
1126                 {
1127                 s->shutdown|=SSL_SENT_SHUTDOWN;
1128 #if 1
1129                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
1130 #endif
1131                 /* our shutdown alert has been sent now, and if it still needs
1132                  * to be written, s->s3->alert_dispatch will be true */
1133                 }
1134         else if (s->s3->alert_dispatch)
1135                 {
1136                 /* resend it if not sent */
1137 #if 1
1138                 ssl3_dispatch_alert(s);
1139 #endif
1140                 }
1141         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
1142                 {
1143                 /* If we are waiting for a close from our peer, we are closed */
1144                 ssl3_read_bytes(s,0,NULL,0);
1145                 }
1146
1147         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
1148                 !s->s3->alert_dispatch)
1149                 return(1);
1150         else
1151                 return(0);
1152         }
1153
1154 int ssl3_write(SSL *s, const void *buf, int len)
1155         {
1156         int ret,n;
1157
1158 #if 0
1159         if (s->shutdown & SSL_SEND_SHUTDOWN)
1160                 {
1161                 s->rwstate=SSL_NOTHING;
1162                 return(0);
1163                 }
1164 #endif
1165         clear_sys_error();
1166         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
1167
1168         /* This is an experimental flag that sends the
1169          * last handshake message in the same packet as the first
1170          * use data - used to see if it helps the TCP protocol during
1171          * session-id reuse */
1172         /* The second test is because the buffer may have been removed */
1173         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
1174                 {
1175                 /* First time through, we write into the buffer */
1176                 if (s->s3->delay_buf_pop_ret == 0)
1177                         {
1178                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
1179                                              buf,len);
1180                         if (ret <= 0) return(ret);
1181
1182                         s->s3->delay_buf_pop_ret=ret;
1183                         }
1184
1185                 s->rwstate=SSL_WRITING;
1186                 n=BIO_flush(s->wbio);
1187                 if (n <= 0) return(n);
1188                 s->rwstate=SSL_NOTHING;
1189
1190                 /* We have flushed the buffer, so remove it */
1191                 ssl_free_wbio_buffer(s);
1192                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
1193
1194                 ret=s->s3->delay_buf_pop_ret;
1195                 s->s3->delay_buf_pop_ret=0;
1196                 }
1197         else
1198                 {
1199                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
1200                                      buf,len);
1201                 if (ret <= 0) return(ret);
1202                 }
1203
1204         return(ret);
1205         }
1206
1207 int ssl3_read(SSL *s, void *buf, int len)
1208         {
1209         int ret;
1210
1211         clear_sys_error();
1212         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
1213         s->s3->in_read_app_data=1;
1214         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
1215         if ((ret == -1) && (s->s3->in_read_app_data == 0))
1216                 {
1217                 ERR_get_error(); /* clear the error */
1218                 s->s3->in_read_app_data=0;
1219                 s->in_handshake++;
1220                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
1221                 s->in_handshake--;
1222                 }
1223         else
1224                 s->s3->in_read_app_data=0;
1225
1226         return(ret);
1227         }
1228
1229 int ssl3_peek(SSL *s, char *buf, int len)
1230         {
1231         SSL3_RECORD *rr;
1232         int n;
1233
1234         rr= &(s->s3->rrec);
1235         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
1236                 {
1237                 n=ssl3_read(s,buf,1);
1238                 if (n <= 0) return(n);
1239                 rr->length++;
1240                 rr->off--;
1241                 }
1242
1243         if ((unsigned int)len > rr->length)
1244                 n=rr->length;
1245         else
1246                 n=len;
1247         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
1248         return(n);
1249         }
1250
1251 int ssl3_renegotiate(SSL *s)
1252         {
1253         if (s->handshake_func == NULL)
1254                 return(1);
1255
1256         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
1257                 return(0);
1258
1259         s->s3->renegotiate=1;
1260         return(1);
1261         }
1262
1263 int ssl3_renegotiate_check(SSL *s)
1264         {
1265         int ret=0;
1266
1267         if (s->s3->renegotiate)
1268                 {
1269                 if (    (s->s3->rbuf.left == 0) &&
1270                         (s->s3->wbuf.left == 0) &&
1271                         !SSL_in_init(s))
1272                         {
1273 /*
1274 if we are the server, and we have sent a 'RENEGOTIATE' message, we
1275 need to go to SSL_ST_ACCEPT.
1276 */
1277                         /* SSL_ST_ACCEPT */
1278                         s->state=SSL_ST_RENEGOTIATE;
1279                         s->s3->renegotiate=0;
1280                         s->s3->num_renegotiations++;
1281                         s->s3->total_renegotiations++;
1282                         ret=1;
1283                         }
1284                 }
1285         return(ret);
1286         }
1287