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         ssl_undefined_function,
 612         ssl3_callback_ctrl,
 613         ssl3_ctx_callback_ctrl,
 614         };
 615
 616 static long ssl3_default_timeout(void)
 617         {
 618         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
 619          * is way too long for http, the cache would over fill */
 620         return(60*60*2);
 621         }
 622
 623 SSL_METHOD *sslv3_base_method(void)
 624         {
 625         return(&SSLv3_data);
 626         }
 627
 628 int ssl3_num_ciphers(void)
 629         {
 630         return(SSL3_NUM_CIPHERS);
 631         }
 632
 633 SSL_CIPHER *ssl3_get_cipher(unsigned int u)
 634         {
 635         if (u < SSL3_NUM_CIPHERS)
 636                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
 637         else
 638                 return(NULL);
 639         }
 640
 641 /* The problem is that it may not be the correct record type */
 642 int ssl3_pending(SSL *s)
 643         {
 644         return(s->s3->rrec.length);
 645         }
 646
 647 int ssl3_new(SSL *s)
 648         {
 649         SSL3_STATE *s3;
 650
 651         if ((s3=Malloc(sizeof *s3)) == NULL) goto err;
 652         memset(s3,0,sizeof *s3);
 653
 654         s->s3=s3;
 655
 656         s->method->ssl_clear(s);
 657         return(1);
 658 err:
 659         return(0);
 660         }
 661
 662 void ssl3_free(SSL *s)
 663         {
 664         if(s == NULL)
 665             return;
 666
 667         ssl3_cleanup_key_block(s);
 668         if (s->s3->rbuf.buf != NULL)
 669                 Free(s->s3->rbuf.buf);
 670         if (s->s3->wbuf.buf != NULL)
 671                 Free(s->s3->wbuf.buf);
 672         if (s->s3->rrec.comp != NULL)
 673                 Free(s->s3->rrec.comp);
 674 #ifndef NO_DH
 675         if (s->s3->tmp.dh != NULL)
 676                 DH_free(s->s3->tmp.dh);
 677 #endif
 678         if (s->s3->tmp.ca_names != NULL)
 679                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 680         memset(s->s3,0,sizeof *s->s3);
 681         Free(s->s3);
 682         s->s3=NULL;
 683         }
 684
 685 void ssl3_clear(SSL *s)
 686         {
 687         unsigned char *rp,*wp;
 688
 689         ssl3_cleanup_key_block(s);
 690         if (s->s3->tmp.ca_names != NULL)
 691                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 692
 693         if (s->s3->rrec.comp != NULL)
 694                 {
 695                 Free(s->s3->rrec.comp);
 696                 s->s3->rrec.comp=NULL;
 697                 }
 698
 699         rp=s->s3->rbuf.buf;
 700         wp=s->s3->wbuf.buf;
 701
 702         memset(s->s3,0,sizeof *s->s3);
 703         if (rp != NULL) s->s3->rbuf.buf=rp;
 704         if (wp != NULL) s->s3->wbuf.buf=wp;
 705
 706         ssl_free_wbio_buffer(s);
 707
 708         s->packet_length=0;
 709         s->s3->renegotiate=0;
 710         s->s3->total_renegotiations=0;
 711         s->s3->num_renegotiations=0;
 712         s->s3->in_read_app_data=0;
 713         s->version=SSL3_VERSION;
 714         }
 715
 716 long ssl3_ctrl(SSL *s, int cmd, long larg, char *parg)
 717         {
 718         int ret=0;
 719
 720 #if !defined(NO_DSA) || !defined(NO_RSA)
 721         if (
 722 #ifndef NO_RSA
 723             cmd == SSL_CTRL_SET_TMP_RSA ||
 724             cmd == SSL_CTRL_SET_TMP_RSA_CB ||
 725 #endif
 726 #ifndef NO_DSA
 727             cmd == SSL_CTRL_SET_TMP_DH ||
 728             cmd == SSL_CTRL_SET_TMP_DH_CB ||
 729 #endif
 730                 0)
 731                 {
 732                 if (!ssl_cert_inst(&s->cert))
 733                         {
 734                         SSLerr(SSL_F_SSL3_CTRL, ERR_R_MALLOC_FAILURE);
 735                         return(0);
 736                         }
 737                 }
 738 #endif
 739
 740         switch (cmd)
 741                 {
 742         case SSL_CTRL_GET_SESSION_REUSED:
 743                 ret=s->hit;
 744                 break;
 745         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 746                 break;
 747         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 748                 ret=s->s3->num_renegotiations;
 749                 break;
 750         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 751                 ret=s->s3->num_renegotiations;
 752                 s->s3->num_renegotiations=0;
 753                 break;
 754         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 755                 ret=s->s3->total_renegotiations;
 756                 break;
 757         case SSL_CTRL_GET_FLAGS:
 758                 ret=(int)(s->s3->flags);
 759                 break;
 760 #ifndef NO_RSA
 761         case SSL_CTRL_NEED_TMP_RSA:
 762                 if ((s->cert != NULL) && (s->cert->rsa_tmp == NULL) &&
 763                     ((s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 764                      (EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8))))
 765                         ret = 1;
 766                 break;
 767         case SSL_CTRL_SET_TMP_RSA:
 768                 {
 769                         RSA *rsa = (RSA *)parg;
 770                         if (rsa == NULL) {
 771                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 772                                 return(ret);
 773                         }
 774                         if ((rsa = RSAPrivateKey_dup(rsa)) == NULL) {
 775                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_RSA_LIB);
 776                                 return(ret);
 777                         }
 778                         if (s->cert->rsa_tmp != NULL)
 779                                 RSA_free(s->cert->rsa_tmp);
 780                         s->cert->rsa_tmp = rsa;
 781                         ret = 1;
 782                 }
 783                 break;
 784         case SSL_CTRL_SET_TMP_RSA_CB:
 785                 {
 786                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 787                 return(ret);
 788                 }
 789                 break;
 790 #endif
 791 #ifndef NO_DH
 792         case SSL_CTRL_SET_TMP_DH:
 793                 {
 794                         DH *dh = (DH *)parg;
 795                         if (dh == NULL) {
 796                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 797                                 return(ret);
 798                         }
 799                         if ((dh = DHparams_dup(dh)) == NULL) {
 800                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_DH_LIB);
 801                                 return(ret);
 802                         }
 803                         if (!DH_generate_key(dh)) {
 804                                 DH_free(dh);
 805                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_DH_LIB);
 806                                 return(ret);
 807                         }
 808                         if (s->cert->dh_tmp != NULL)
 809                                 DH_free(s->cert->dh_tmp);
 810                         s->cert->dh_tmp = dh;
 811                         ret = 1;
 812                 }
 813                 break;
 814         case SSL_CTRL_SET_TMP_DH_CB:
 815                 {
 816                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 817                 return(ret);
 818                 }
 819                 break;
 820 #endif
 821         default:
 822                 break;
 823                 }
 824         return(ret);
 825         }
 826
 827 long ssl3_callback_ctrl(SSL *s, int cmd, void (*fp)())
 828         {
 829         int ret=0;
 830
 831 #if !defined(NO_DSA) || !defined(NO_RSA)
 832         if (
 833 #ifndef NO_RSA
 834             cmd == SSL_CTRL_SET_TMP_RSA_CB ||
 835 #endif
 836 #ifndef NO_DSA
 837             cmd == SSL_CTRL_SET_TMP_DH_CB ||
 838 #endif
 839                 0)
 840                 {
 841                 if (!ssl_cert_inst(&s->cert))
 842                         {
 843                         SSLerr(SSL_F_SSL3_CTRL, ERR_R_MALLOC_FAILURE);
 844                         return(0);
 845                         }
 846                 }
 847 #endif
 848
 849         switch (cmd)
 850                 {
 851 #ifndef NO_RSA
 852         case SSL_CTRL_SET_TMP_RSA_CB:
 853                 {
 854                 s->cert->rsa_tmp_cb = (RSA *(*)(SSL *, int, int))fp;
 855                 }
 856                 break;
 857 #endif
 858 #ifndef NO_DH
 859         case SSL_CTRL_SET_TMP_DH_CB:
 860                 {
 861                 s->cert->dh_tmp_cb = (DH *(*)(SSL *, int, int))fp;
 862                 }
 863                 break;
 864 #endif
 865         default:
 866                 break;
 867                 }
 868         return(ret);
 869         }
 870
 871 long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, char *parg)
 872         {
 873         CERT *cert;
 874
 875         cert=ctx->cert;
 876
 877         switch (cmd)
 878                 {
 879 #ifndef NO_RSA
 880         case SSL_CTRL_NEED_TMP_RSA:
 881                 if (    (cert->rsa_tmp == NULL) &&
 882                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 883                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 884                         )
 885                         return(1);
 886                 else
 887                         return(0);
 888                 /* break; */
 889         case SSL_CTRL_SET_TMP_RSA:
 890                 {
 891                 RSA *rsa;
 892                 int i;
 893
 894                 rsa=(RSA *)parg;
 895                 i=1;
 896                 if (rsa == NULL)
 897                         i=0;
 898                 else
 899                         {
 900                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 901                                 i=0;
 902                         }
 903                 if (!i)
 904                         {
 905                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 906                         return(0);
 907                         }
 908                 else
 909                         {
 910                         if (cert->rsa_tmp != NULL)
 911                                 RSA_free(cert->rsa_tmp);
 912                         cert->rsa_tmp=rsa;
 913                         return(1);
 914                         }
 915                 }
 916                 /* break; */
 917         case SSL_CTRL_SET_TMP_RSA_CB:
 918                 {
 919                 SSLerr(SSL_F_SSL3_CTX_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 920                 return(0);
 921                 }
 922                 break;
 923 #endif
 924 #ifndef NO_DH
 925         case SSL_CTRL_SET_TMP_DH:
 926                 {
 927                 DH *new=NULL,*dh;
 928                 int rret=0;
 929
 930                 dh=(DH *)parg;
 931                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 932                         (!DH_generate_key(new)))
 933                         {
 934                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 935                         if (new != NULL) DH_free(new);
 936                         }
 937                 else
 938                         {
 939                         if (cert->dh_tmp != NULL)
 940                                 DH_free(cert->dh_tmp);
 941                         cert->dh_tmp=new;
 942                         rret=1;
 943                         }
 944                 return(rret);
 945                 }
 946                 /*break; */
 947         case SSL_CTRL_SET_TMP_DH_CB:
 948                 {
 949                 SSLerr(SSL_F_SSL3_CTX_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 950                 return(0);
 951                 }
 952                 break;
 953 #endif
 954         /* A Thawte special :-) */
 955         case SSL_CTRL_EXTRA_CHAIN_CERT:
 956                 if (ctx->extra_certs == NULL)
 957                         {
 958                         if ((ctx->extra_certs=sk_X509_new_null()) == NULL)
 959                                 return(0);
 960                         }
 961                 sk_X509_push(ctx->extra_certs,(X509 *)parg);
 962                 break;
 963
 964         default:
 965                 return(0);
 966                 }
 967         return(1);
 968         }
 969
 970 long ssl3_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
 971         {
 972         CERT *cert;
 973
 974         cert=ctx->cert;
 975
 976         switch (cmd)
 977                 {
 978 #ifndef NO_RSA
 979         case SSL_CTRL_SET_TMP_RSA_CB:
 980                 {
 981                 cert->rsa_tmp_cb = (RSA *(*)(SSL *, int, int))fp;
 982                 }
 983                 break;
 984 #endif
 985 #ifndef NO_DH
 986         case SSL_CTRL_SET_TMP_DH_CB:
 987                 {
 988                 cert->dh_tmp_cb = (DH *(*)(SSL *, int, int))fp;
 989                 }
 990                 break;
 991 #endif
 992         default:
 993                 return(0);
 994                 }
 995         return(1);
 996         }
 997
 998 /* This function needs to check if the ciphers required are actually
 999  * available */
1000 SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p)
1001         {
1002         static int init=1;
1003         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
1004         SSL_CIPHER c,*cp= &c,**cpp;
1005         unsigned long id;
1006         int i;
1007
1008         if (init)
1009                 {
1010                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
1011
1012                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
1013                         sorted[i]= &(ssl3_ciphers[i]);
1014
1015                 qsort(  (char *)sorted,
1016                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
1017                         FP_ICC ssl_cipher_ptr_id_cmp);
1018
1019                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
1020
1021                 init=0;
1022                 }
1023
1024         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
1025         c.id=id;
1026         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
1027                 (char *)sorted,
1028                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
1029                 (int (*)())ssl_cipher_ptr_id_cmp);
1030         if ((cpp == NULL) || !(*cpp)->valid)
1031                 return(NULL);
1032         else
1033                 return(*cpp);
1034         }
1035
1036 int ssl3_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
1037         {
1038         long l;
1039
1040         if (p != NULL)
1041                 {
1042                 l=c->id;
1043                 if ((l & 0xff000000) != 0x03000000) return(0);
1044                 p[0]=((unsigned char)(l>> 8L))&0xFF;
1045                 p[1]=((unsigned char)(l     ))&0xFF;
1046                 }
1047         return(2);
1048         }
1049
1050 SSL_CIPHER *ssl3_choose_cipher(SSL *s, STACK_OF(SSL_CIPHER) *have,
1051              STACK_OF(SSL_CIPHER) *pref)
1052         {
1053         SSL_CIPHER *c,*ret=NULL;
1054         int i,j,ok;
1055         CERT *cert;
1056         unsigned long alg,mask,emask;
1057
1058         /* Let's see which ciphers we can support */
1059         cert=s->cert;
1060
1061         sk_SSL_CIPHER_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
1062
1063 #ifdef CIPHER_DEBUG
1064         printf("Have:\n");
1065         for(i=0 ; i < sk_num(pref) ; ++i)
1066             {
1067             c=(SSL_CIPHER *)sk_value(pref,i);
1068             printf("%p:%s\n",c,c->name);
1069             }
1070 #endif
1071
1072         for (i=0; i<sk_SSL_CIPHER_num(have); i++)
1073                 {
1074                 c=sk_SSL_CIPHER_value(have,i);
1075
1076                 ssl_set_cert_masks(cert,c);
1077                 mask=cert->mask;
1078                 emask=cert->export_mask;
1079
1080                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1081                 if (SSL_C_IS_EXPORT(c))
1082                         {
1083                         ok=((alg & emask) == alg)?1:0;
1084 #ifdef CIPHER_DEBUG
1085                         printf("%d:[%08lX:%08lX]%p:%s (export)\n",ok,alg,emask,
1086                                c,c->name);
1087 #endif
1088                         }
1089                 else
1090                         {
1091                         ok=((alg & mask) == alg)?1:0;
1092 #ifdef CIPHER_DEBUG
1093                         printf("%d:[%08lX:%08lX]%p:%s\n",ok,alg,mask,c,
1094                                c->name);
1095 #endif
1096                         }
1097
1098                 if (!ok) continue;
1099
1100                 j=sk_SSL_CIPHER_find(pref,c);
1101                 if (j >= 0)
1102                         {
1103                         ret=sk_SSL_CIPHER_value(pref,j);
1104                         break;
1105                         }
1106                 }
1107         return(ret);
1108         }
1109
1110 int ssl3_get_req_cert_type(SSL *s, unsigned char *p)
1111         {
1112         int ret=0;
1113         unsigned long alg;
1114
1115         alg=s->s3->tmp.new_cipher->algorithms;
1116
1117 #ifndef NO_DH
1118         if (alg & (SSL_kDHr|SSL_kEDH))
1119                 {
1120 #  ifndef NO_RSA
1121                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
1122 #  endif
1123 #  ifndef NO_DSA
1124                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
1125 #  endif
1126                 }
1127         if ((s->version == SSL3_VERSION) &&
1128                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
1129                 {
1130 #  ifndef NO_RSA
1131                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
1132 #  endif
1133 #  ifndef NO_DSA
1134                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
1135 #  endif
1136                 }
1137 #endif /* !NO_DH */
1138 #ifndef NO_RSA
1139         p[ret++]=SSL3_CT_RSA_SIGN;
1140 #endif
1141 #ifndef NO_DSA
1142         p[ret++]=SSL3_CT_DSS_SIGN;
1143 #endif
1144         return(ret);
1145         }
1146
1147 int ssl3_shutdown(SSL *s)
1148         {
1149
1150         /* Don't do anything much if we have not done the handshake or
1151          * we don't want to send messages :-) */
1152         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
1153                 {
1154                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
1155                 return(1);
1156                 }
1157
1158         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
1159                 {
1160                 s->shutdown|=SSL_SENT_SHUTDOWN;
1161 #if 1
1162                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
1163 #endif
1164                 /* our shutdown alert has been sent now, and if it still needs
1165                  * to be written, s->s3->alert_dispatch will be true */
1166                 }
1167         else if (s->s3->alert_dispatch)
1168                 {
1169                 /* resend it if not sent */
1170 #if 1
1171                 ssl3_dispatch_alert(s);
1172 #endif
1173                 }
1174         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
1175                 {
1176                 /* If we are waiting for a close from our peer, we are closed */
1177                 ssl3_read_bytes(s,0,NULL,0);
1178                 }
1179
1180         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
1181                 !s->s3->alert_dispatch)
1182                 return(1);
1183         else
1184                 return(0);
1185         }
1186
1187 int ssl3_write(SSL *s, const void *buf, int len)
1188         {
1189         int ret,n;
1190
1191 #if 0
1192         if (s->shutdown & SSL_SEND_SHUTDOWN)
1193                 {
1194                 s->rwstate=SSL_NOTHING;
1195                 return(0);
1196                 }
1197 #endif
1198         clear_sys_error();
1199         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
1200
1201         /* This is an experimental flag that sends the
1202          * last handshake message in the same packet as the first
1203          * use data - used to see if it helps the TCP protocol during
1204          * session-id reuse */
1205         /* The second test is because the buffer may have been removed */
1206         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
1207                 {
1208                 /* First time through, we write into the buffer */
1209                 if (s->s3->delay_buf_pop_ret == 0)
1210                         {
1211                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
1212                                              buf,len);
1213                         if (ret <= 0) return(ret);
1214
1215                         s->s3->delay_buf_pop_ret=ret;
1216                         }
1217
1218                 s->rwstate=SSL_WRITING;
1219                 n=BIO_flush(s->wbio);
1220                 if (n <= 0) return(n);
1221                 s->rwstate=SSL_NOTHING;
1222
1223                 /* We have flushed the buffer, so remove it */
1224                 ssl_free_wbio_buffer(s);
1225                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
1226
1227                 ret=s->s3->delay_buf_pop_ret;
1228                 s->s3->delay_buf_pop_ret=0;
1229                 }
1230         else
1231                 {
1232                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
1233                                      buf,len);
1234                 if (ret <= 0) return(ret);
1235                 }
1236
1237         return(ret);
1238         }
1239
1240 int ssl3_read(SSL *s, void *buf, int len)
1241         {
1242         int ret;
1243
1244         clear_sys_error();
1245         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
1246         s->s3->in_read_app_data=1;
1247         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
1248         if ((ret == -1) && (s->s3->in_read_app_data == 0))
1249                 {
1250                 /* ssl3_read_bytes decided to call s->handshake_func, which
1251                  * called ssl3_read_bytes to read handshake data.
1252                  * However, ssl3_read_bytes actually found application data
1253                  * and thinks that application data makes sense here (signalled
1254                  * by resetting 'in_read_app_data', strangely); so disable
1255                  * handshake processing and try to read application data again. */
1256                 s->in_handshake++;
1257                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
1258                 s->in_handshake--;
1259                 }
1260         else
1261                 s->s3->in_read_app_data=0;
1262
1263         return(ret);
1264         }
1265
1266 int ssl3_peek(SSL *s, char *buf, int len)
1267         {
1268         SSL3_RECORD *rr;
1269         int n;
1270
1271         rr= &(s->s3->rrec);
1272         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
1273                 {
1274                 n=ssl3_read(s,buf,1);
1275                 if (n <= 0) return(n);
1276                 rr->length++;
1277                 rr->off--;
1278                 }
1279
1280         if ((unsigned int)len > rr->length)
1281                 n=rr->length;
1282         else
1283                 n=len;
1284         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
1285         return(n);
1286         }
1287
1288 int ssl3_renegotiate(SSL *s)
1289         {
1290         if (s->handshake_func == NULL)
1291                 return(1);
1292
1293         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
1294                 return(0);
1295
1296         s->s3->renegotiate=1;
1297         return(1);
1298         }
1299
1300 int ssl3_renegotiate_check(SSL *s)
1301         {
1302         int ret=0;
1303
1304         if (s->s3->renegotiate)
1305                 {
1306                 if (    (s->s3->rbuf.left == 0) &&
1307                         (s->s3->wbuf.left == 0) &&
1308                         !SSL_in_init(s))
1309                         {
1310 /*
1311 if we are the server, and we have sent a 'RENEGOTIATE' message, we
1312 need to go to SSL_ST_ACCEPT.
1313 */
1314                         /* SSL_ST_ACCEPT */
1315                         s->state=SSL_ST_RENEGOTIATE;
1316                         s->s3->renegotiate=0;
1317                         s->s3->num_renegotiations++;
1318                         s->s3->total_renegotiations++;
1319                         ret=1;
1320                         }
1321                 }
1322         return(ret);
1323         }
1324