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