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 "objects.h"
  61 #include "ssl_locl.h"
  62
  63 char *ssl3_version_str="SSLv3 part of SSLeay 0.9.1a 06-Jul-1998";
  64
  65 #define SSL3_NUM_CIPHERS        (sizeof(ssl3_ciphers)/sizeof(SSL_CIPHER))
  66
  67 #ifndef NOPROTO
  68 static long ssl3_default_timeout(void );
  69 #else
  70 static long ssl3_default_timeout();
  71 #endif
  72
  73 SSL_CIPHER ssl3_ciphers[]={
  74 /* The RSA ciphers */
  75 /* Cipher 01 */
  76         {
  77         1,
  78         SSL3_TXT_RSA_NULL_MD5,
  79         SSL3_CK_RSA_NULL_MD5,
  80         SSL_kRSA|SSL_aRSA|SSL_eNULL |SSL_MD5|SSL_NOT_EXP|SSL_SSLV3,
  81         0,
  82         SSL_ALL_CIPHERS,
  83         },
  84 /* Cipher 02 */
  85         {
  86         1,
  87         SSL3_TXT_RSA_NULL_SHA,
  88         SSL3_CK_RSA_NULL_SHA,
  89         SSL_kRSA|SSL_aRSA|SSL_eNULL |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
  90         0,
  91         SSL_ALL_CIPHERS,
  92         },
  93
  94 /* anon DH */
  95 /* Cipher 17 */
  96         {
  97         1,
  98         SSL3_TXT_ADH_RC4_40_MD5,
  99         SSL3_CK_ADH_RC4_40_MD5,
 100         SSL_kEDH |SSL_aNULL|SSL_RC4  |SSL_MD5 |SSL_EXP|SSL_SSLV3,
 101         0,
 102         SSL_ALL_CIPHERS,
 103         },
 104 /* Cipher 18 */
 105         {
 106         1,
 107         SSL3_TXT_ADH_RC4_128_MD5,
 108         SSL3_CK_ADH_RC4_128_MD5,
 109         SSL_kEDH |SSL_aNULL|SSL_RC4  |SSL_MD5|SSL_NOT_EXP|SSL_SSLV3,
 110         0,
 111         SSL_ALL_CIPHERS,
 112         },
 113 /* Cipher 19 */
 114         {
 115         1,
 116         SSL3_TXT_ADH_DES_40_CBC_SHA,
 117         SSL3_CK_ADH_DES_40_CBC_SHA,
 118         SSL_kEDH |SSL_aNULL|SSL_DES|SSL_SHA1|SSL_EXP|SSL_SSLV3,
 119         0,
 120         SSL_ALL_CIPHERS,
 121         },
 122 /* Cipher 1A */
 123         {
 124         1,
 125         SSL3_TXT_ADH_DES_64_CBC_SHA,
 126         SSL3_CK_ADH_DES_64_CBC_SHA,
 127         SSL_kEDH |SSL_aNULL|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
 128         0,
 129         SSL_ALL_CIPHERS,
 130         },
 131 /* Cipher 1B */
 132         {
 133         1,
 134         SSL3_TXT_ADH_DES_192_CBC_SHA,
 135         SSL3_CK_ADH_DES_192_CBC_SHA,
 136         SSL_kEDH |SSL_aNULL|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
 137         0,
 138         SSL_ALL_CIPHERS,
 139         },
 140
 141 /* RSA again */
 142 /* Cipher 03 */
 143         {
 144         1,
 145         SSL3_TXT_RSA_RC4_40_MD5,
 146         SSL3_CK_RSA_RC4_40_MD5,
 147         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_MD5 |SSL_EXP|SSL_SSLV3,
 148         0,
 149         SSL_ALL_CIPHERS,
 150         },
 151 /* Cipher 04 */
 152         {
 153         1,
 154         SSL3_TXT_RSA_RC4_128_MD5,
 155         SSL3_CK_RSA_RC4_128_MD5,
 156         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_MD5|SSL_NOT_EXP|SSL_SSLV3|SSL_MEDIUM,
 157         0,
 158         SSL_ALL_CIPHERS,
 159         },
 160 /* Cipher 05 */
 161         {
 162         1,
 163         SSL3_TXT_RSA_RC4_128_SHA,
 164         SSL3_CK_RSA_RC4_128_SHA,
 165         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_MEDIUM,
 166         0,
 167         SSL_ALL_CIPHERS,
 168         },
 169 /* Cipher 06 */
 170         {
 171         1,
 172         SSL3_TXT_RSA_RC2_40_MD5,
 173         SSL3_CK_RSA_RC2_40_MD5,
 174         SSL_kRSA|SSL_aRSA|SSL_RC2  |SSL_MD5 |SSL_EXP|SSL_SSLV3,
 175         0,
 176         SSL_ALL_CIPHERS,
 177         },
 178 /* Cipher 07 */
 179         {
 180         1,
 181         SSL3_TXT_RSA_IDEA_128_SHA,
 182         SSL3_CK_RSA_IDEA_128_SHA,
 183         SSL_kRSA|SSL_aRSA|SSL_IDEA |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_MEDIUM,
 184         0,
 185         SSL_ALL_CIPHERS,
 186         },
 187 /* Cipher 08 */
 188         {
 189         1,
 190         SSL3_TXT_RSA_DES_40_CBC_SHA,
 191         SSL3_CK_RSA_DES_40_CBC_SHA,
 192         SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1|SSL_EXP|SSL_SSLV3,
 193         0,
 194         SSL_ALL_CIPHERS,
 195         },
 196 /* Cipher 09 */
 197         {
 198         1,
 199         SSL3_TXT_RSA_DES_64_CBC_SHA,
 200         SSL3_CK_RSA_DES_64_CBC_SHA,
 201         SSL_kRSA|SSL_aRSA|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
 202         0,
 203         SSL_ALL_CIPHERS,
 204         },
 205 /* Cipher 0A */
 206         {
 207         1,
 208         SSL3_TXT_RSA_DES_192_CBC3_SHA,
 209         SSL3_CK_RSA_DES_192_CBC3_SHA,
 210         SSL_kRSA|SSL_aRSA|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
 211         0,
 212         SSL_ALL_CIPHERS,
 213         },
 214
 215 /*  The DH ciphers */
 216 /* Cipher 0B */
 217         {
 218         0,
 219         SSL3_TXT_DH_DSS_DES_40_CBC_SHA,
 220         SSL3_CK_DH_DSS_DES_40_CBC_SHA,
 221         SSL_kDHd |SSL_aDH|SSL_DES|SSL_SHA1|SSL_EXP|SSL_SSLV3,
 222         0,
 223         SSL_ALL_CIPHERS,
 224         },
 225 /* Cipher 0C */
 226         {
 227         0,
 228         SSL3_TXT_DH_DSS_DES_64_CBC_SHA,
 229         SSL3_CK_DH_DSS_DES_64_CBC_SHA,
 230         SSL_kDHd |SSL_aDH|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
 231         0,
 232         SSL_ALL_CIPHERS,
 233         },
 234 /* Cipher 0D */
 235         {
 236         0,
 237         SSL3_TXT_DH_DSS_DES_192_CBC3_SHA,
 238         SSL3_CK_DH_DSS_DES_192_CBC3_SHA,
 239         SSL_kDHd |SSL_aDH|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
 240         0,
 241         SSL_ALL_CIPHERS,
 242         },
 243 /* Cipher 0E */
 244         {
 245         0,
 246         SSL3_TXT_DH_RSA_DES_40_CBC_SHA,
 247         SSL3_CK_DH_RSA_DES_40_CBC_SHA,
 248         SSL_kDHr |SSL_aDH|SSL_DES|SSL_SHA1|SSL_EXP|SSL_SSLV3,
 249         0,
 250         SSL_ALL_CIPHERS,
 251         },
 252 /* Cipher 0F */
 253         {
 254         0,
 255         SSL3_TXT_DH_RSA_DES_64_CBC_SHA,
 256         SSL3_CK_DH_RSA_DES_64_CBC_SHA,
 257         SSL_kDHr |SSL_aDH|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
 258         0,
 259         SSL_ALL_CIPHERS,
 260         },
 261 /* Cipher 10 */
 262         {
 263         0,
 264         SSL3_TXT_DH_RSA_DES_192_CBC3_SHA,
 265         SSL3_CK_DH_RSA_DES_192_CBC3_SHA,
 266         SSL_kDHr |SSL_aDH|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
 267         0,
 268         SSL_ALL_CIPHERS,
 269         },
 270
 271 /* The Ephemeral DH ciphers */
 272 /* Cipher 11 */
 273         {
 274         1,
 275         SSL3_TXT_EDH_DSS_DES_40_CBC_SHA,
 276         SSL3_CK_EDH_DSS_DES_40_CBC_SHA,
 277         SSL_kEDH|SSL_aDSS|SSL_DES|SSL_SHA1|SSL_EXP|SSL_SSLV3,
 278         0,
 279         SSL_ALL_CIPHERS,
 280         },
 281 /* Cipher 12 */
 282         {
 283         1,
 284         SSL3_TXT_EDH_DSS_DES_64_CBC_SHA,
 285         SSL3_CK_EDH_DSS_DES_64_CBC_SHA,
 286         SSL_kEDH|SSL_aDSS|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
 287         0,
 288         SSL_ALL_CIPHERS,
 289         },
 290 /* Cipher 13 */
 291         {
 292         1,
 293         SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA,
 294         SSL3_CK_EDH_DSS_DES_192_CBC3_SHA,
 295         SSL_kEDH|SSL_aDSS|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
 296         0,
 297         SSL_ALL_CIPHERS,
 298         },
 299 /* Cipher 14 */
 300         {
 301         1,
 302         SSL3_TXT_EDH_RSA_DES_40_CBC_SHA,
 303         SSL3_CK_EDH_RSA_DES_40_CBC_SHA,
 304         SSL_kEDH|SSL_aRSA|SSL_DES|SSL_SHA1|SSL_EXP|SSL_SSLV3,
 305         0,
 306         SSL_ALL_CIPHERS,
 307         },
 308 /* Cipher 15 */
 309         {
 310         1,
 311         SSL3_TXT_EDH_RSA_DES_64_CBC_SHA,
 312         SSL3_CK_EDH_RSA_DES_64_CBC_SHA,
 313         SSL_kEDH|SSL_aRSA|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
 314         0,
 315         SSL_ALL_CIPHERS,
 316         },
 317 /* Cipher 16 */
 318         {
 319         1,
 320         SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA,
 321         SSL3_CK_EDH_RSA_DES_192_CBC3_SHA,
 322         SSL_kEDH|SSL_aRSA|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
 323         0,
 324         SSL_ALL_CIPHERS,
 325         },
 326
 327 /* Fortezza */
 328 /* Cipher 1C */
 329         {
 330         0,
 331         SSL3_TXT_FZA_DMS_NULL_SHA,
 332         SSL3_CK_FZA_DMS_NULL_SHA,
 333         SSL_kFZA|SSL_aFZA |SSL_eNULL |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
 334         0,
 335         SSL_ALL_CIPHERS,
 336         },
 337
 338 /* Cipher 1D */
 339         {
 340         0,
 341         SSL3_TXT_FZA_DMS_FZA_SHA,
 342         SSL3_CK_FZA_DMS_FZA_SHA,
 343         SSL_kFZA|SSL_aFZA |SSL_eFZA |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
 344         0,
 345         SSL_ALL_CIPHERS,
 346         },
 347
 348 /* Cipher 1E */
 349         {
 350         0,
 351         SSL3_TXT_FZA_DMS_RC4_SHA,
 352         SSL3_CK_FZA_DMS_RC4_SHA,
 353         SSL_kFZA|SSL_aFZA |SSL_RC4  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
 354         0,
 355         SSL_ALL_CIPHERS,
 356         },
 357
 358 /* end of list */
 359         };
 360
 361 static SSL3_ENC_METHOD SSLv3_enc_data={
 362         ssl3_enc,
 363         ssl3_mac,
 364         ssl3_setup_key_block,
 365         ssl3_generate_master_secret,
 366         ssl3_change_cipher_state,
 367         ssl3_final_finish_mac,
 368         MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
 369         ssl3_cert_verify_mac,
 370         SSL3_MD_CLIENT_FINISHED_CONST,4,
 371         SSL3_MD_SERVER_FINISHED_CONST,4,
 372         ssl3_alert_code,
 373         };
 374
 375 static SSL_METHOD SSLv3_data= {
 376         SSL3_VERSION,
 377         ssl3_new,
 378         ssl3_clear,
 379         ssl3_free,
 380         ssl_undefined_function,
 381         ssl_undefined_function,
 382         ssl3_read,
 383         ssl3_peek,
 384         ssl3_write,
 385         ssl3_shutdown,
 386         ssl3_renegotiate,
 387         ssl3_renegotiate_check,
 388         ssl3_ctrl,
 389         ssl3_ctx_ctrl,
 390         ssl3_get_cipher_by_char,
 391         ssl3_put_cipher_by_char,
 392         ssl3_pending,
 393         ssl3_num_ciphers,
 394         ssl3_get_cipher,
 395         ssl_bad_method,
 396         ssl3_default_timeout,
 397         &SSLv3_enc_data,
 398         };
 399
 400 static long ssl3_default_timeout()
 401         {
 402         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
 403          * is way too long for http, the cache would over fill */
 404         return(60*60*2);
 405         }
 406
 407 SSL_METHOD *sslv3_base_method()
 408         {
 409         return(&SSLv3_data);
 410         }
 411
 412 int ssl3_num_ciphers()
 413         {
 414         return(SSL3_NUM_CIPHERS);
 415         }
 416
 417 SSL_CIPHER *ssl3_get_cipher(u)
 418 unsigned int u;
 419         {
 420         if (u < SSL3_NUM_CIPHERS)
 421                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
 422         else
 423                 return(NULL);
 424         }
 425
 426 /* The problem is that it may not be the correct record type */
 427 int ssl3_pending(s)
 428 SSL *s;
 429         {
 430         return(s->s3->rrec.length);
 431         }
 432
 433 int ssl3_new(s)
 434 SSL *s;
 435         {
 436         SSL3_CTX *s3;
 437
 438         if ((s3=(SSL3_CTX *)Malloc(sizeof(SSL3_CTX))) == NULL) goto err;
 439         memset(s3,0,sizeof(SSL3_CTX));
 440
 441         s->s3=s3;
 442         /*
 443         s->s3->tmp.ca_names=NULL;
 444         s->s3->tmp.key_block=NULL;
 445         s->s3->tmp.key_block_length=0;
 446         s->s3->rbuf.buf=NULL;
 447         s->s3->wbuf.buf=NULL;
 448         */
 449
 450         s->method->ssl_clear(s);
 451         return(1);
 452 err:
 453         return(0);
 454         }
 455
 456 void ssl3_free(s)
 457 SSL *s;
 458         {
 459         ssl3_cleanup_key_block(s);
 460         if (s->s3->rbuf.buf != NULL)
 461                 Free(s->s3->rbuf.buf);
 462         if (s->s3->wbuf.buf != NULL)
 463                 Free(s->s3->wbuf.buf);
 464         if (s->s3->rrec.comp != NULL)
 465                 Free(s->s3->rrec.comp);
 466 #ifndef NO_DH
 467         if (s->s3->tmp.dh != NULL)
 468                 DH_free(s->s3->tmp.dh);
 469 #endif
 470         if (s->s3->tmp.ca_names != NULL)
 471                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 472         memset(s->s3,0,sizeof(SSL3_CTX));
 473         Free(s->s3);
 474         s->s3=NULL;
 475         }
 476
 477 void ssl3_clear(s)
 478 SSL *s;
 479         {
 480         unsigned char *rp,*wp;
 481
 482         ssl3_cleanup_key_block(s);
 483         if (s->s3->tmp.ca_names != NULL)
 484                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 485
 486         rp=s->s3->rbuf.buf;
 487         wp=s->s3->wbuf.buf;
 488
 489         memset(s->s3,0,sizeof(SSL3_CTX));
 490         if (rp != NULL) s->s3->rbuf.buf=rp;
 491         if (wp != NULL) s->s3->wbuf.buf=wp;
 492
 493         if (s->s3->rrec.comp != NULL)
 494                 {
 495                 Free(s->s3->rrec.comp);
 496                 s->s3->rrec.comp=NULL;
 497                 }
 498
 499         s->packet_length=0;
 500         s->s3->renegotiate=0;
 501         s->s3->total_renegotiations=0;
 502         s->s3->num_renegotiations=0;
 503         s->s3->in_read_app_data=0;
 504         s->version=SSL3_VERSION;
 505         }
 506
 507 long ssl3_ctrl(s,cmd,larg,parg)
 508 SSL *s;
 509 int cmd;
 510 long larg;
 511 char *parg;
 512         {
 513         int ret=0;
 514
 515         switch (cmd)
 516                 {
 517         case SSL_CTRL_GET_SESSION_REUSED:
 518                 ret=s->hit;
 519                 break;
 520         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 521                 break;
 522         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 523                 ret=s->s3->num_renegotiations;
 524                 break;
 525         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 526                 ret=s->s3->num_renegotiations;
 527                 s->s3->num_renegotiations=0;
 528                 break;
 529         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 530                 ret=s->s3->total_renegotiations;
 531                 break;
 532         case SSL_CTRL_GET_FLAGS:
 533                 ret=s->s3->flags;
 534                 break;
 535         default:
 536                 break;
 537                 }
 538         return(ret);
 539         }
 540
 541 long ssl3_ctx_ctrl(ctx,cmd,larg,parg)
 542 SSL_CTX *ctx;
 543 int cmd;
 544 long larg;
 545 char *parg;
 546         {
 547         CERT *cert;
 548
 549         cert=ctx->default_cert;
 550
 551         switch (cmd)
 552                 {
 553 #ifndef NO_RSA
 554         case SSL_CTRL_NEED_TMP_RSA:
 555                 if (    (cert->rsa_tmp == NULL) &&
 556                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 557                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 558                         )
 559                         return(1);
 560                 else
 561                         return(0);
 562                 /* break; */
 563         case SSL_CTRL_SET_TMP_RSA:
 564                 {
 565                 RSA *rsa;
 566                 int i;
 567
 568                 rsa=(RSA *)parg;
 569                 i=1;
 570                 if (rsa == NULL)
 571                         i=0;
 572                 else
 573                         {
 574                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 575                                 i=0;
 576                         }
 577                 if (!i)
 578                         {
 579                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 580                         return(0);
 581                         }
 582                 else
 583                         {
 584                         if (cert->rsa_tmp != NULL)
 585                                 RSA_free(cert->rsa_tmp);
 586                         cert->rsa_tmp=rsa;
 587                         return(1);
 588                         }
 589                 }
 590                 /* break; */
 591         case SSL_CTRL_SET_TMP_RSA_CB:
 592                 cert->rsa_tmp_cb=(RSA *(*)())parg;
 593                 break;
 594 #endif
 595 #ifndef NO_DH
 596         case SSL_CTRL_SET_TMP_DH:
 597                 {
 598                 DH *new=NULL,*dh;
 599                 int rret=0;
 600
 601                 dh=(DH *)parg;
 602                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 603                         (!DH_generate_key(new)))
 604                         {
 605                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 606                         if (new != NULL) DH_free(new);
 607                         }
 608                 else
 609                         {
 610                         if (cert->dh_tmp != NULL)
 611                                 DH_free(cert->dh_tmp);
 612                         cert->dh_tmp=new;
 613                         rret=1;
 614                         }
 615                 return(rret);
 616                 }
 617                 /*break; */
 618         case SSL_CTRL_SET_TMP_DH_CB:
 619                 cert->dh_tmp_cb=(DH *(*)())parg;
 620                 break;
 621 #endif
 622         /* A Thwate special :-) */
 623         case SSL_CTRL_EXTRA_CHAIN_CERT:
 624                 if (ctx->extra_certs == NULL)
 625                         {
 626                         if ((ctx->extra_certs=sk_new_null()) == NULL)
 627                                 return(0);
 628                         }
 629                 sk_push(ctx->extra_certs,(char *)parg);
 630                 break;
 631
 632         default:
 633                 return(0);
 634                 }
 635         return(1);
 636         }
 637
 638 /* This function needs to check if the ciphers required are actually
 639  * available */
 640 SSL_CIPHER *ssl3_get_cipher_by_char(p)
 641 unsigned char *p;
 642         {
 643         static int init=1;
 644         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
 645         SSL_CIPHER c,*cp= &c,**cpp;
 646         unsigned long id;
 647         int i;
 648
 649         if (init)
 650                 {
 651                 init=0;
 652
 653                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
 654                         sorted[i]= &(ssl3_ciphers[i]);
 655
 656                 qsort(  (char *)sorted,
 657                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 658                         FP_ICC ssl_cipher_ptr_id_cmp);
 659                 }
 660
 661         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
 662         c.id=id;
 663         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 664                 (char *)sorted,
 665                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 666                 (int (*)())ssl_cipher_ptr_id_cmp);
 667         if ((cpp == NULL) || !(*cpp)->valid)
 668                 return(NULL);
 669         else
 670                 return(*cpp);
 671         }
 672
 673 int ssl3_put_cipher_by_char(c,p)
 674 SSL_CIPHER *c;
 675 unsigned char *p;
 676         {
 677         long l;
 678
 679         if (p != NULL)
 680                 {
 681                 l=c->id;
 682                 if ((l & 0xff000000) != 0x03000000) return(0);
 683                 p[0]=((unsigned char)(l>> 8L))&0xFF;
 684                 p[1]=((unsigned char)(l     ))&0xFF;
 685                 }
 686         return(2);
 687         }
 688
 689 int ssl3_part_read(s,i)
 690 SSL *s;
 691 int i;
 692         {
 693         s->rwstate=SSL_READING;
 694
 695         if (i < 0)
 696                 {
 697                 return(i);
 698                 }
 699         else
 700                 {
 701                 s->init_num+=i;
 702                 return(0);
 703                 }
 704         }
 705
 706 SSL_CIPHER *ssl3_choose_cipher(s,have,pref)
 707 SSL *s;
 708 STACK *have,*pref;
 709         {
 710         SSL_CIPHER *c,*ret=NULL;
 711         int i,j,ok;
 712         CERT *cert;
 713         unsigned long alg,mask,emask;
 714
 715         /* Lets see which ciphers we can supported */
 716         if (s->cert != NULL)
 717                 cert=s->cert;
 718         else
 719                 cert=s->ctx->default_cert;
 720
 721         ssl_set_cert_masks(cert);
 722         mask=cert->mask;
 723         emask=cert->export_mask;
 724
 725         sk_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
 726
 727         for (i=0; i<sk_num(have); i++)
 728                 {
 729                 c=(SSL_CIPHER *)sk_value(have,i);
 730                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
 731                 if (alg & SSL_EXPORT)
 732                         {
 733                         ok=((alg & emask) == alg)?1:0;
 734 #ifdef CIPHER_DEBUG
 735                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 736 #endif
 737                         }
 738                 else
 739                         {
 740                         ok=((alg & mask) == alg)?1:0;
 741 #ifdef CIPHER_DEBUG
 742                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 743 #endif
 744                         }
 745
 746                 if (!ok) continue;
 747
 748                 j=sk_find(pref,(char *)c);
 749                 if (j >= 0)
 750                         {
 751                         ret=(SSL_CIPHER *)sk_value(pref,j);
 752                         break;
 753                         }
 754                 }
 755         return(ret);
 756         }
 757
 758 int ssl3_get_req_cert_type(s,p)
 759 SSL *s;
 760 unsigned char *p;
 761         {
 762         int ret=0;
 763         unsigned long alg;
 764
 765         alg=s->s3->tmp.new_cipher->algorithms;
 766
 767 #ifndef NO_DH
 768         if (alg & (SSL_kDHr|SSL_kEDH))
 769                 {
 770 #  ifndef NO_RSA
 771                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
 772 #  endif
 773 #  ifndef NO_DSA
 774                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
 775 #  endif
 776                 }
 777         if ((s->version == SSL3_VERSION) &&
 778                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
 779                 {
 780 #  ifndef NO_RSA
 781                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
 782 #  endif
 783 #  ifndef NO_DSA
 784                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
 785 #  endif
 786                 }
 787 #endif /* !NO_DH */
 788 #ifndef NO_RSA
 789         p[ret++]=SSL3_CT_RSA_SIGN;
 790 #endif
 791 #ifndef NO_DSA
 792         p[ret++]=SSL3_CT_DSS_SIGN;
 793 #endif
 794         return(ret);
 795         }
 796
 797 int ssl3_shutdown(s)
 798 SSL *s;
 799         {
 800
 801         /* Don't do anything much if we have not done the handshake or
 802          * we don't want to send messages :-) */
 803         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
 804                 {
 805                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 806                 return(1);
 807                 }
 808
 809         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
 810                 {
 811                 s->shutdown|=SSL_SENT_SHUTDOWN;
 812 #if 1
 813                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
 814 #endif
 815                 /* our shutdown alert has been sent now, and if it still needs
 816                  * to be written, s->s3->alert_dispatch will be true */
 817                 }
 818         else if (s->s3->alert_dispatch)
 819                 {
 820                 /* resend it if not sent */
 821 #if 1
 822                 ssl3_dispatch_alert(s);
 823 #endif
 824                 }
 825         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
 826                 {
 827                 /* If we are waiting for a close from our peer, we are closed */
 828                 ssl3_read_bytes(s,0,NULL,0);
 829                 }
 830
 831         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
 832                 !s->s3->alert_dispatch)
 833                 return(1);
 834         else
 835                 return(0);
 836         }
 837
 838 int ssl3_write(s,buf,len)
 839 SSL *s;
 840 char *buf;
 841 int len;
 842         {
 843         int ret,n;
 844         BIO *under;
 845
 846 #if 0
 847         if (s->shutdown & SSL_SEND_SHUTDOWN)
 848                 {
 849                 s->rwstate=SSL_NOTHING;
 850                 return(0);
 851                 }
 852 #endif
 853         clear_sys_error();
 854         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 855
 856         /* This is an experimental flag that sends the
 857          * last handshake message in the same packet as the first
 858          * use data - used to see if it helps the TCP protocol during
 859          * session-id reuse */
 860         /* The second test is because the buffer may have been removed */
 861         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
 862                 {
 863                 /* First time through, we write into the buffer */
 864                 if (s->s3->delay_buf_pop_ret == 0)
 865                         {
 866                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 867                                 (char *)buf,len);
 868                         if (ret <= 0) return(ret);
 869
 870                         s->s3->delay_buf_pop_ret=ret;
 871                         }
 872
 873                 s->rwstate=SSL_WRITING;
 874                 n=BIO_flush(s->wbio);
 875                 if (n <= 0) return(n);
 876                 s->rwstate=SSL_NOTHING;
 877
 878                 /* We have flushed the buffer */
 879                 under=BIO_pop(s->wbio);
 880                 s->wbio=under;
 881                 BIO_free(s->bbio);
 882                 s->bbio=NULL;
 883                 ret=s->s3->delay_buf_pop_ret;
 884                 s->s3->delay_buf_pop_ret=0;
 885
 886                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 887                 }
 888         else
 889                 {
 890                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 891                         (char *)buf,len);
 892                 if (ret <= 0) return(ret);
 893                 }
 894
 895         return(ret);
 896         }
 897
 898 int ssl3_read(s,buf,len)
 899 SSL *s;
 900 char *buf;
 901 int len;
 902         {
 903         int ret;
 904
 905         clear_sys_error();
 906         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 907         s->s3->in_read_app_data=1;
 908         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 909         if ((ret == -1) && (s->s3->in_read_app_data == 0))
 910                 {
 911                 ERR_get_error(); /* clear the error */
 912                 s->s3->in_read_app_data=0;
 913                 s->in_handshake++;
 914                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 915                 s->in_handshake--;
 916                 }
 917         else
 918                 s->s3->in_read_app_data=0;
 919
 920         return(ret);
 921         }
 922
 923 int ssl3_peek(s,buf,len)
 924 SSL *s;
 925 char *buf;
 926 int len;
 927         {
 928         SSL3_RECORD *rr;
 929         int n;
 930
 931         rr= &(s->s3->rrec);
 932         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
 933                 {
 934                 n=ssl3_read(s,buf,1);
 935                 if (n <= 0) return(n);
 936                 rr->length++;
 937                 rr->off--;
 938                 }
 939
 940         if ((unsigned int)len > rr->length)
 941                 n=rr->length;
 942         else
 943                 n=len;
 944         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
 945         return(n);
 946         }
 947
 948 int ssl3_renegotiate(s)
 949 SSL *s;
 950         {
 951         if (s->handshake_func == NULL)
 952                 return(1);
 953
 954         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
 955                 return(0);
 956
 957         s->s3->renegotiate=1;
 958         return(1);
 959         }
 960
 961 int ssl3_renegotiate_check(s)
 962 SSL *s;
 963         {
 964         int ret=0;
 965
 966         if (s->s3->renegotiate)
 967                 {
 968                 if (    (s->s3->rbuf.left == 0) &&
 969                         (s->s3->wbuf.left == 0) &&
 970                         !SSL_in_init(s))
 971                         {
 972 /*
 973 if we are the server, and we have sent a 'RENEGOTIATE' message, we
 974 need to go to SSL_ST_ACCEPT.\1e
 975 */
 976                         /* SSL_ST_ACCEPT */
 977                         s->state=SSL_ST_RENEGOTIATE;
 978                         s->s3->renegotiate=0;
 979                         s->s3->num_renegotiations++;
 980                         s->s3->total_renegotiations++;
 981                         ret=1;
 982                         }
 983                 }
 984         return(ret);
 985         }
 986
 987