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=OPENSSL_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                 OPENSSL_free(s->s3->rbuf.buf);
 670         if (s->s3->wbuf.buf != NULL)
 671                 OPENSSL_free(s->s3->wbuf.buf);
 672         if (s->s3->rrec.comp != NULL)
 673                 OPENSSL_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         OPENSSL_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                 OPENSSL_free(s->s3->rrec.comp);
 696                 s->s3->rrec.comp=NULL;
 697                 }
 698 #ifndef NO_DH
 699         if (s->s3->tmp.dh != NULL)
 700                 DH_free(s->s3->tmp.dh);
 701 #endif
 702
 703         rp=s->s3->rbuf.buf;
 704         wp=s->s3->wbuf.buf;
 705
 706         memset(s->s3,0,sizeof *s->s3);
 707         if (rp != NULL) s->s3->rbuf.buf=rp;
 708         if (wp != NULL) s->s3->wbuf.buf=wp;
 709
 710         ssl_free_wbio_buffer(s);
 711
 712         s->packet_length=0;
 713         s->s3->renegotiate=0;
 714         s->s3->total_renegotiations=0;
 715         s->s3->num_renegotiations=0;
 716         s->s3->in_read_app_data=0;
 717         s->version=SSL3_VERSION;
 718         }
 719
 720 long ssl3_ctrl(SSL *s, int cmd, long larg, char *parg)
 721         {
 722         int ret=0;
 723
 724 #if !defined(NO_DSA) || !defined(NO_RSA)
 725         if (
 726 #ifndef NO_RSA
 727             cmd == SSL_CTRL_SET_TMP_RSA ||
 728             cmd == SSL_CTRL_SET_TMP_RSA_CB ||
 729 #endif
 730 #ifndef NO_DSA
 731             cmd == SSL_CTRL_SET_TMP_DH ||
 732             cmd == SSL_CTRL_SET_TMP_DH_CB ||
 733 #endif
 734                 0)
 735                 {
 736                 if (!ssl_cert_inst(&s->cert))
 737                         {
 738                         SSLerr(SSL_F_SSL3_CTRL, ERR_R_MALLOC_FAILURE);
 739                         return(0);
 740                         }
 741                 }
 742 #endif
 743
 744         switch (cmd)
 745                 {
 746         case SSL_CTRL_GET_SESSION_REUSED:
 747                 ret=s->hit;
 748                 break;
 749         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 750                 break;
 751         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 752                 ret=s->s3->num_renegotiations;
 753                 break;
 754         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 755                 ret=s->s3->num_renegotiations;
 756                 s->s3->num_renegotiations=0;
 757                 break;
 758         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 759                 ret=s->s3->total_renegotiations;
 760                 break;
 761         case SSL_CTRL_GET_FLAGS:
 762                 ret=(int)(s->s3->flags);
 763                 break;
 764 #ifndef NO_RSA
 765         case SSL_CTRL_NEED_TMP_RSA:
 766                 if ((s->cert != NULL) && (s->cert->rsa_tmp == NULL) &&
 767                     ((s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 768                      (EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8))))
 769                         ret = 1;
 770                 break;
 771         case SSL_CTRL_SET_TMP_RSA:
 772                 {
 773                         RSA *rsa = (RSA *)parg;
 774                         if (rsa == NULL)
 775                                 {
 776                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 777                                 return(ret);
 778                                 }
 779                         if ((rsa = RSAPrivateKey_dup(rsa)) == NULL)
 780                                 {
 781                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_RSA_LIB);
 782                                 return(ret);
 783                                 }
 784                         if (s->cert->rsa_tmp != NULL)
 785                                 RSA_free(s->cert->rsa_tmp);
 786                         s->cert->rsa_tmp = rsa;
 787                         ret = 1;
 788                 }
 789                 break;
 790         case SSL_CTRL_SET_TMP_RSA_CB:
 791                 {
 792                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 793                 return(ret);
 794                 }
 795                 break;
 796 #endif
 797 #ifndef NO_DH
 798         case SSL_CTRL_SET_TMP_DH:
 799                 {
 800                         DH *dh = (DH *)parg;
 801                         if (dh == NULL)
 802                                 {
 803                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 804                                 return(ret);
 805                                 }
 806                         if ((dh = DHparams_dup(dh)) == NULL)
 807                                 {
 808                                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_DH_LIB);
 809                                 return(ret);
 810                                 }
 811                         if (!(s->options & SSL_OP_SINGLE_DH_USE))
 812                                 {
 813                                 if (!DH_generate_key(dh))
 814                                         {
 815                                         DH_free(dh);
 816                                         SSLerr(SSL_F_SSL3_CTRL, ERR_R_DH_LIB);
 817                                         return(ret);
 818                                         }
 819                                 }
 820                         if (s->cert->dh_tmp != NULL)
 821                                 DH_free(s->cert->dh_tmp);
 822                         s->cert->dh_tmp = dh;
 823                         ret = 1;
 824                 }
 825                 break;
 826         case SSL_CTRL_SET_TMP_DH_CB:
 827                 {
 828                 SSLerr(SSL_F_SSL3_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 829                 return(ret);
 830                 }
 831                 break;
 832 #endif
 833         default:
 834                 break;
 835                 }
 836         return(ret);
 837         }
 838
 839 long ssl3_callback_ctrl(SSL *s, int cmd, void (*fp)())
 840         {
 841         int ret=0;
 842
 843 #if !defined(NO_DSA) || !defined(NO_RSA)
 844         if (
 845 #ifndef NO_RSA
 846             cmd == SSL_CTRL_SET_TMP_RSA_CB ||
 847 #endif
 848 #ifndef NO_DSA
 849             cmd == SSL_CTRL_SET_TMP_DH_CB ||
 850 #endif
 851                 0)
 852                 {
 853                 if (!ssl_cert_inst(&s->cert))
 854                         {
 855                         SSLerr(SSL_F_SSL3_CALLBACK_CTRL, ERR_R_MALLOC_FAILURE);
 856                         return(0);
 857                         }
 858                 }
 859 #endif
 860
 861         switch (cmd)
 862                 {
 863 #ifndef NO_RSA
 864         case SSL_CTRL_SET_TMP_RSA_CB:
 865                 {
 866                 s->cert->rsa_tmp_cb = (RSA *(*)(SSL *, int, int))fp;
 867                 }
 868                 break;
 869 #endif
 870 #ifndef NO_DH
 871         case SSL_CTRL_SET_TMP_DH_CB:
 872                 {
 873                 s->cert->dh_tmp_cb = (DH *(*)(SSL *, int, int))fp;
 874                 }
 875                 break;
 876 #endif
 877         default:
 878                 break;
 879                 }
 880         return(ret);
 881         }
 882
 883 long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, char *parg)
 884         {
 885         CERT *cert;
 886
 887         cert=ctx->cert;
 888
 889         switch (cmd)
 890                 {
 891 #ifndef NO_RSA
 892         case SSL_CTRL_NEED_TMP_RSA:
 893                 if (    (cert->rsa_tmp == NULL) &&
 894                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 895                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 896                         )
 897                         return(1);
 898                 else
 899                         return(0);
 900                 /* break; */
 901         case SSL_CTRL_SET_TMP_RSA:
 902                 {
 903                 RSA *rsa;
 904                 int i;
 905
 906                 rsa=(RSA *)parg;
 907                 i=1;
 908                 if (rsa == NULL)
 909                         i=0;
 910                 else
 911                         {
 912                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 913                                 i=0;
 914                         }
 915                 if (!i)
 916                         {
 917                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 918                         return(0);
 919                         }
 920                 else
 921                         {
 922                         if (cert->rsa_tmp != NULL)
 923                                 RSA_free(cert->rsa_tmp);
 924                         cert->rsa_tmp=rsa;
 925                         return(1);
 926                         }
 927                 }
 928                 /* break; */
 929         case SSL_CTRL_SET_TMP_RSA_CB:
 930                 {
 931                 SSLerr(SSL_F_SSL3_CTX_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 932                 return(0);
 933                 }
 934                 break;
 935 #endif
 936 #ifndef NO_DH
 937         case SSL_CTRL_SET_TMP_DH:
 938                 {
 939                 DH *new=NULL,*dh;
 940
 941                 dh=(DH *)parg;
 942                 if ((new=DHparams_dup(dh)) == NULL)
 943                         {
 944                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 945                         return 0;
 946                         }
 947                 if (!(ctx->options & SSL_OP_SINGLE_DH_USE))
 948                         {
 949                         if (!DH_generate_key(new))
 950                                 {
 951                                 SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 952                                 DH_free(new);
 953                                 return 0;
 954                                 }
 955                         }
 956                 if (cert->dh_tmp != NULL)
 957                         DH_free(cert->dh_tmp);
 958                 cert->dh_tmp=new;
 959                 return 1;
 960                 }
 961                 /*break; */
 962         case SSL_CTRL_SET_TMP_DH_CB:
 963                 {
 964                 SSLerr(SSL_F_SSL3_CTX_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 965                 return(0);
 966                 }
 967                 break;
 968 #endif
 969         /* A Thawte special :-) */
 970         case SSL_CTRL_EXTRA_CHAIN_CERT:
 971                 if (ctx->extra_certs == NULL)
 972                         {
 973                         if ((ctx->extra_certs=sk_X509_new_null()) == NULL)
 974                                 return(0);
 975                         }
 976                 sk_X509_push(ctx->extra_certs,(X509 *)parg);
 977                 break;
 978
 979         default:
 980                 return(0);
 981                 }
 982         return(1);
 983         }
 984
 985 long ssl3_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
 986         {
 987         CERT *cert;
 988
 989         cert=ctx->cert;
 990
 991         switch (cmd)
 992                 {
 993 #ifndef NO_RSA
 994         case SSL_CTRL_SET_TMP_RSA_CB:
 995                 {
 996                 cert->rsa_tmp_cb = (RSA *(*)(SSL *, int, int))fp;
 997                 }
 998                 break;
 999 #endif
1000 #ifndef NO_DH
1001         case SSL_CTRL_SET_TMP_DH_CB:
1002                 {
1003                 cert->dh_tmp_cb = (DH *(*)(SSL *, int, int))fp;
1004                 }
1005                 break;
1006 #endif
1007         default:
1008                 return(0);
1009                 }
1010         return(1);
1011         }
1012
1013 /* This function needs to check if the ciphers required are actually
1014  * available */
1015 SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p)
1016         {
1017         static int init=1;
1018         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
1019         SSL_CIPHER c,*cp= &c,**cpp;
1020         unsigned long id;
1021         int i;
1022
1023         if (init)
1024                 {
1025                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
1026
1027                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
1028                         sorted[i]= &(ssl3_ciphers[i]);
1029
1030                 qsort(  (char *)sorted,
1031                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
1032                         FP_ICC ssl_cipher_ptr_id_cmp);
1033
1034                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
1035
1036                 init=0;
1037                 }
1038
1039         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
1040         c.id=id;
1041         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
1042                 (char *)sorted,
1043                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
1044                 FP_ICC ssl_cipher_ptr_id_cmp);
1045         if ((cpp == NULL) || !(*cpp)->valid)
1046                 return(NULL);
1047         else
1048                 return(*cpp);
1049         }
1050
1051 int ssl3_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
1052         {
1053         long l;
1054
1055         if (p != NULL)
1056                 {
1057                 l=c->id;
1058                 if ((l & 0xff000000) != 0x03000000) return(0);
1059                 p[0]=((unsigned char)(l>> 8L))&0xFF;
1060                 p[1]=((unsigned char)(l     ))&0xFF;
1061                 }
1062         return(2);
1063         }
1064
1065 SSL_CIPHER *ssl3_choose_cipher(SSL *s, STACK_OF(SSL_CIPHER) *have,
1066              STACK_OF(SSL_CIPHER) *pref)
1067         {
1068         SSL_CIPHER *c,*ret=NULL;
1069         int i,j,ok;
1070         CERT *cert;
1071         unsigned long alg,mask,emask;
1072
1073         /* Let's see which ciphers we can support */
1074         cert=s->cert;
1075
1076         sk_SSL_CIPHER_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
1077
1078 #ifdef CIPHER_DEBUG
1079         printf("Have:\n");
1080         for(i=0 ; i < sk_num(pref) ; ++i)
1081             {
1082             c=(SSL_CIPHER *)sk_value(pref,i);
1083             printf("%p:%s\n",c,c->name);
1084             }
1085 #endif
1086
1087         for (i=0; i<sk_SSL_CIPHER_num(have); i++)
1088                 {
1089                 c=sk_SSL_CIPHER_value(have,i);
1090
1091                 ssl_set_cert_masks(cert,c);
1092                 mask=cert->mask;
1093                 emask=cert->export_mask;
1094
1095                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1096                 if (SSL_C_IS_EXPORT(c))
1097                         {
1098                         ok=((alg & emask) == alg)?1:0;
1099 #ifdef CIPHER_DEBUG
1100                         printf("%d:[%08lX:%08lX]%p:%s (export)\n",ok,alg,emask,
1101                                c,c->name);
1102 #endif
1103                         }
1104                 else
1105                         {
1106                         ok=((alg & mask) == alg)?1:0;
1107 #ifdef CIPHER_DEBUG
1108                         printf("%d:[%08lX:%08lX]%p:%s\n",ok,alg,mask,c,
1109                                c->name);
1110 #endif
1111                         }
1112
1113                 if (!ok) continue;
1114
1115                 j=sk_SSL_CIPHER_find(pref,c);
1116                 if (j >= 0)
1117                         {
1118                         ret=sk_SSL_CIPHER_value(pref,j);
1119                         break;
1120                         }
1121                 }
1122         return(ret);
1123         }
1124
1125 int ssl3_get_req_cert_type(SSL *s, unsigned char *p)
1126         {
1127         int ret=0;
1128         unsigned long alg;
1129
1130         alg=s->s3->tmp.new_cipher->algorithms;
1131
1132 #ifndef NO_DH
1133         if (alg & (SSL_kDHr|SSL_kEDH))
1134                 {
1135 #  ifndef NO_RSA
1136                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
1137 #  endif
1138 #  ifndef NO_DSA
1139                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
1140 #  endif
1141                 }
1142         if ((s->version == SSL3_VERSION) &&
1143                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
1144                 {
1145 #  ifndef NO_RSA
1146                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
1147 #  endif
1148 #  ifndef NO_DSA
1149                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
1150 #  endif
1151                 }
1152 #endif /* !NO_DH */
1153 #ifndef NO_RSA
1154         p[ret++]=SSL3_CT_RSA_SIGN;
1155 #endif
1156 #ifndef NO_DSA
1157         p[ret++]=SSL3_CT_DSS_SIGN;
1158 #endif
1159         return(ret);
1160         }
1161
1162 int ssl3_shutdown(SSL *s)
1163         {
1164
1165         /* Don't do anything much if we have not done the handshake or
1166          * we don't want to send messages :-) */
1167         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
1168                 {
1169                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
1170                 return(1);
1171                 }
1172
1173         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
1174                 {
1175                 s->shutdown|=SSL_SENT_SHUTDOWN;
1176 #if 1
1177                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
1178 #endif
1179                 /* our shutdown alert has been sent now, and if it still needs
1180                  * to be written, s->s3->alert_dispatch will be true */
1181                 }
1182         else if (s->s3->alert_dispatch)
1183                 {
1184                 /* resend it if not sent */
1185 #if 1
1186                 ssl3_dispatch_alert(s);
1187 #endif
1188                 }
1189         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
1190                 {
1191                 /* If we are waiting for a close from our peer, we are closed */
1192                 ssl3_read_bytes(s,0,NULL,0);
1193                 }
1194
1195         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
1196                 !s->s3->alert_dispatch)
1197                 return(1);
1198         else
1199                 return(0);
1200         }
1201
1202 int ssl3_write(SSL *s, const void *buf, int len)
1203         {
1204         int ret,n;
1205
1206 #if 0
1207         if (s->shutdown & SSL_SEND_SHUTDOWN)
1208                 {
1209                 s->rwstate=SSL_NOTHING;
1210                 return(0);
1211                 }
1212 #endif
1213         clear_sys_error();
1214         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
1215
1216         /* This is an experimental flag that sends the
1217          * last handshake message in the same packet as the first
1218          * use data - used to see if it helps the TCP protocol during
1219          * session-id reuse */
1220         /* The second test is because the buffer may have been removed */
1221         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
1222                 {
1223                 /* First time through, we write into the buffer */
1224                 if (s->s3->delay_buf_pop_ret == 0)
1225                         {
1226                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
1227                                              buf,len);
1228                         if (ret <= 0) return(ret);
1229
1230                         s->s3->delay_buf_pop_ret=ret;
1231                         }
1232
1233                 s->rwstate=SSL_WRITING;
1234                 n=BIO_flush(s->wbio);
1235                 if (n <= 0) return(n);
1236                 s->rwstate=SSL_NOTHING;
1237
1238                 /* We have flushed the buffer, so remove it */
1239                 ssl_free_wbio_buffer(s);
1240                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
1241
1242                 ret=s->s3->delay_buf_pop_ret;
1243                 s->s3->delay_buf_pop_ret=0;
1244                 }
1245         else
1246                 {
1247                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
1248                                      buf,len);
1249                 if (ret <= 0) return(ret);
1250                 }
1251
1252         return(ret);
1253         }
1254
1255 int ssl3_read(SSL *s, void *buf, int len)
1256         {
1257         int ret;
1258
1259         clear_sys_error();
1260         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
1261         s->s3->in_read_app_data=1;
1262         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
1263         if ((ret == -1) && (s->s3->in_read_app_data == 0))
1264                 {
1265                 /* ssl3_read_bytes decided to call s->handshake_func, which
1266                  * called ssl3_read_bytes to read handshake data.
1267                  * However, ssl3_read_bytes actually found application data
1268                  * and thinks that application data makes sense here (signalled
1269                  * by resetting 'in_read_app_data', strangely); so disable
1270                  * handshake processing and try to read application data again. */
1271                 s->in_handshake++;
1272                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
1273                 s->in_handshake--;
1274                 }
1275         else
1276                 s->s3->in_read_app_data=0;
1277
1278         return(ret);
1279         }
1280
1281 int ssl3_peek(SSL *s, char *buf, int len)
1282         {
1283         SSL3_RECORD *rr;
1284         int n;
1285
1286         rr= &(s->s3->rrec);
1287         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
1288                 {
1289                 n=ssl3_read(s,buf,1);
1290                 if (n <= 0) return(n);
1291                 rr->length++;
1292                 rr->off--;
1293                 }
1294
1295         if ((unsigned int)len > rr->length)
1296                 n=rr->length;
1297         else
1298                 n=len;
1299         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
1300         return(n);
1301         }
1302
1303 int ssl3_renegotiate(SSL *s)
1304         {
1305         if (s->handshake_func == NULL)
1306                 return(1);
1307
1308         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
1309                 return(0);
1310
1311         s->s3->renegotiate=1;
1312         return(1);
1313         }
1314
1315 int ssl3_renegotiate_check(SSL *s)
1316         {
1317         int ret=0;
1318
1319         if (s->s3->renegotiate)
1320                 {
1321                 if (    (s->s3->rbuf.left == 0) &&
1322                         (s->s3->wbuf.left == 0) &&
1323                         !SSL_in_init(s))
1324                         {
1325 /*
1326 if we are the server, and we have sent a 'RENEGOTIATE' message, we
1327 need to go to SSL_ST_ACCEPT.
1328 */
1329                         /* SSL_ST_ACCEPT */
1330                         s->state=SSL_ST_RENEGOTIATE;
1331                         s->s3->renegotiate=0;
1332                         s->s3->num_renegotiations++;
1333                         s->s3->total_renegotiations++;
1334                         ret=1;
1335                         }
1336                 }
1337         return(ret);
1338         }
1339