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 OpenSSL 0.9.2 31-Dec-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         if(s == NULL)
 460             return;
 461
 462         ssl3_cleanup_key_block(s);
 463         if (s->s3->rbuf.buf != NULL)
 464                 Free(s->s3->rbuf.buf);
 465         if (s->s3->wbuf.buf != NULL)
 466                 Free(s->s3->wbuf.buf);
 467         if (s->s3->rrec.comp != NULL)
 468                 Free(s->s3->rrec.comp);
 469 #ifndef NO_DH
 470         if (s->s3->tmp.dh != NULL)
 471                 DH_free(s->s3->tmp.dh);
 472 #endif
 473         if (s->s3->tmp.ca_names != NULL)
 474                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 475         memset(s->s3,0,sizeof(SSL3_CTX));
 476         Free(s->s3);
 477         s->s3=NULL;
 478         }
 479
 480 void ssl3_clear(s)
 481 SSL *s;
 482         {
 483         unsigned char *rp,*wp;
 484
 485         ssl3_cleanup_key_block(s);
 486         if (s->s3->tmp.ca_names != NULL)
 487                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 488
 489         rp=s->s3->rbuf.buf;
 490         wp=s->s3->wbuf.buf;
 491
 492         memset(s->s3,0,sizeof(SSL3_CTX));
 493         if (rp != NULL) s->s3->rbuf.buf=rp;
 494         if (wp != NULL) s->s3->wbuf.buf=wp;
 495
 496         if (s->s3->rrec.comp != NULL)
 497                 {
 498                 Free(s->s3->rrec.comp);
 499                 s->s3->rrec.comp=NULL;
 500                 }
 501
 502         s->packet_length=0;
 503         s->s3->renegotiate=0;
 504         s->s3->total_renegotiations=0;
 505         s->s3->num_renegotiations=0;
 506         s->s3->in_read_app_data=0;
 507         s->version=SSL3_VERSION;
 508         }
 509
 510 long ssl3_ctrl(s,cmd,larg,parg)
 511 SSL *s;
 512 int cmd;
 513 long larg;
 514 char *parg;
 515         {
 516         int ret=0;
 517
 518         switch (cmd)
 519                 {
 520         case SSL_CTRL_GET_SESSION_REUSED:
 521                 ret=s->hit;
 522                 break;
 523         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 524                 break;
 525         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 526                 ret=s->s3->num_renegotiations;
 527                 break;
 528         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 529                 ret=s->s3->num_renegotiations;
 530                 s->s3->num_renegotiations=0;
 531                 break;
 532         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 533                 ret=s->s3->total_renegotiations;
 534                 break;
 535         case SSL_CTRL_GET_FLAGS:
 536                 ret=(int)(s->s3->flags);
 537                 break;
 538         default:
 539                 break;
 540                 }
 541         return(ret);
 542         }
 543
 544 long ssl3_ctx_ctrl(ctx,cmd,larg,parg)
 545 SSL_CTX *ctx;
 546 int cmd;
 547 long larg;
 548 char *parg;
 549         {
 550         CERT *cert;
 551
 552         cert=ctx->default_cert;
 553
 554         switch (cmd)
 555                 {
 556 #ifndef NO_RSA
 557         case SSL_CTRL_NEED_TMP_RSA:
 558                 if (    (cert->rsa_tmp == NULL) &&
 559                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 560                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 561                         )
 562                         return(1);
 563                 else
 564                         return(0);
 565                 /* break; */
 566         case SSL_CTRL_SET_TMP_RSA:
 567                 {
 568                 RSA *rsa;
 569                 int i;
 570
 571                 rsa=(RSA *)parg;
 572                 i=1;
 573                 if (rsa == NULL)
 574                         i=0;
 575                 else
 576                         {
 577                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 578                                 i=0;
 579                         }
 580                 if (!i)
 581                         {
 582                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 583                         return(0);
 584                         }
 585                 else
 586                         {
 587                         if (cert->rsa_tmp != NULL)
 588                                 RSA_free(cert->rsa_tmp);
 589                         cert->rsa_tmp=rsa;
 590                         return(1);
 591                         }
 592                 }
 593                 /* break; */
 594         case SSL_CTRL_SET_TMP_RSA_CB:
 595                 cert->rsa_tmp_cb=(RSA *(*)())parg;
 596                 break;
 597 #endif
 598 #ifndef NO_DH
 599         case SSL_CTRL_SET_TMP_DH:
 600                 {
 601                 DH *new=NULL,*dh;
 602                 int rret=0;
 603
 604                 dh=(DH *)parg;
 605                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 606                         (!DH_generate_key(new)))
 607                         {
 608                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 609                         if (new != NULL) DH_free(new);
 610                         }
 611                 else
 612                         {
 613                         if (cert->dh_tmp != NULL)
 614                                 DH_free(cert->dh_tmp);
 615                         cert->dh_tmp=new;
 616                         rret=1;
 617                         }
 618                 return(rret);
 619                 }
 620                 /*break; */
 621         case SSL_CTRL_SET_TMP_DH_CB:
 622                 cert->dh_tmp_cb=(DH *(*)())parg;
 623                 break;
 624 #endif
 625         /* A Thawte special :-) */
 626         case SSL_CTRL_EXTRA_CHAIN_CERT:
 627                 if (ctx->extra_certs == NULL)
 628                         {
 629                         if ((ctx->extra_certs=sk_new_null()) == NULL)
 630                                 return(0);
 631                         }
 632                 sk_push(ctx->extra_certs,(char *)parg);
 633                 break;
 634
 635         default:
 636                 return(0);
 637                 }
 638         return(1);
 639         }
 640
 641 /* This function needs to check if the ciphers required are actually
 642  * available */
 643 SSL_CIPHER *ssl3_get_cipher_by_char(p)
 644 const unsigned char *p;
 645         {
 646         static int init=1;
 647         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
 648         SSL_CIPHER c,*cp= &c,**cpp;
 649         unsigned long id;
 650         int i;
 651
 652         if (init)
 653                 {
 654                 init=0;
 655
 656                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
 657                         sorted[i]= &(ssl3_ciphers[i]);
 658
 659                 qsort(  (char *)sorted,
 660                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 661                         FP_ICC ssl_cipher_ptr_id_cmp);
 662                 }
 663
 664         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
 665         c.id=id;
 666         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 667                 (char *)sorted,
 668                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 669                 (int (*)())ssl_cipher_ptr_id_cmp);
 670         if ((cpp == NULL) || !(*cpp)->valid)
 671                 return(NULL);
 672         else
 673                 return(*cpp);
 674         }
 675
 676 int ssl3_put_cipher_by_char(c,p)
 677 const SSL_CIPHER *c;
 678 unsigned char *p;
 679         {
 680         long l;
 681
 682         if (p != NULL)
 683                 {
 684                 l=c->id;
 685                 if ((l & 0xff000000) != 0x03000000) return(0);
 686                 p[0]=((unsigned char)(l>> 8L))&0xFF;
 687                 p[1]=((unsigned char)(l     ))&0xFF;
 688                 }
 689         return(2);
 690         }
 691
 692 int ssl3_part_read(s,i)
 693 SSL *s;
 694 int i;
 695         {
 696         s->rwstate=SSL_READING;
 697
 698         if (i < 0)
 699                 {
 700                 return(i);
 701                 }
 702         else
 703                 {
 704                 s->init_num+=i;
 705                 return(0);
 706                 }
 707         }
 708
 709 SSL_CIPHER *ssl3_choose_cipher(s,have,pref)
 710 SSL *s;
 711 STACK *have,*pref;
 712         {
 713         SSL_CIPHER *c,*ret=NULL;
 714         int i,j,ok;
 715         CERT *cert;
 716         unsigned long alg,mask,emask;
 717
 718         /* Lets see which ciphers we can supported */
 719         if (s->cert != NULL)
 720                 cert=s->cert;
 721         else
 722                 cert=s->ctx->default_cert;
 723
 724         ssl_set_cert_masks(cert);
 725         mask=cert->mask;
 726         emask=cert->export_mask;
 727
 728         sk_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
 729
 730         for (i=0; i<sk_num(have); i++)
 731                 {
 732                 c=(SSL_CIPHER *)sk_value(have,i);
 733                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
 734                 if (alg & SSL_EXPORT)
 735                         {
 736                         ok=((alg & emask) == alg)?1:0;
 737 #ifdef CIPHER_DEBUG
 738                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 739 #endif
 740                         }
 741                 else
 742                         {
 743                         ok=((alg & mask) == alg)?1:0;
 744 #ifdef CIPHER_DEBUG
 745                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 746 #endif
 747                         }
 748
 749                 if (!ok) continue;
 750
 751                 j=sk_find(pref,(char *)c);
 752                 if (j >= 0)
 753                         {
 754                         ret=(SSL_CIPHER *)sk_value(pref,j);
 755                         break;
 756                         }
 757                 }
 758         return(ret);
 759         }
 760
 761 int ssl3_get_req_cert_type(s,p)
 762 SSL *s;
 763 unsigned char *p;
 764         {
 765         int ret=0;
 766         unsigned long alg;
 767
 768         alg=s->s3->tmp.new_cipher->algorithms;
 769
 770 #ifndef NO_DH
 771         if (alg & (SSL_kDHr|SSL_kEDH))
 772                 {
 773 #  ifndef NO_RSA
 774                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
 775 #  endif
 776 #  ifndef NO_DSA
 777                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
 778 #  endif
 779                 }
 780         if ((s->version == SSL3_VERSION) &&
 781                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
 782                 {
 783 #  ifndef NO_RSA
 784                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
 785 #  endif
 786 #  ifndef NO_DSA
 787                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
 788 #  endif
 789                 }
 790 #endif /* !NO_DH */
 791 #ifndef NO_RSA
 792         p[ret++]=SSL3_CT_RSA_SIGN;
 793 #endif
 794 #ifndef NO_DSA
 795         p[ret++]=SSL3_CT_DSS_SIGN;
 796 #endif
 797         return(ret);
 798         }
 799
 800 int ssl3_shutdown(s)
 801 SSL *s;
 802         {
 803
 804         /* Don't do anything much if we have not done the handshake or
 805          * we don't want to send messages :-) */
 806         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
 807                 {
 808                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 809                 return(1);
 810                 }
 811
 812         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
 813                 {
 814                 s->shutdown|=SSL_SENT_SHUTDOWN;
 815 #if 1
 816                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
 817 #endif
 818                 /* our shutdown alert has been sent now, and if it still needs
 819                  * to be written, s->s3->alert_dispatch will be true */
 820                 }
 821         else if (s->s3->alert_dispatch)
 822                 {
 823                 /* resend it if not sent */
 824 #if 1
 825                 ssl3_dispatch_alert(s);
 826 #endif
 827                 }
 828         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
 829                 {
 830                 /* If we are waiting for a close from our peer, we are closed */
 831                 ssl3_read_bytes(s,0,NULL,0);
 832                 }
 833
 834         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
 835                 !s->s3->alert_dispatch)
 836                 return(1);
 837         else
 838                 return(0);
 839         }
 840
 841 int ssl3_write(s,buf,len)
 842 SSL *s;
 843 const char *buf;
 844 int len;
 845         {
 846         int ret,n;
 847         BIO *under;
 848
 849 #if 0
 850         if (s->shutdown & SSL_SEND_SHUTDOWN)
 851                 {
 852                 s->rwstate=SSL_NOTHING;
 853                 return(0);
 854                 }
 855 #endif
 856         clear_sys_error();
 857         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 858
 859         /* This is an experimental flag that sends the
 860          * last handshake message in the same packet as the first
 861          * use data - used to see if it helps the TCP protocol during
 862          * session-id reuse */
 863         /* The second test is because the buffer may have been removed */
 864         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
 865                 {
 866                 /* First time through, we write into the buffer */
 867                 if (s->s3->delay_buf_pop_ret == 0)
 868                         {
 869                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 870                                 (char *)buf,len);
 871                         if (ret <= 0) return(ret);
 872
 873                         s->s3->delay_buf_pop_ret=ret;
 874                         }
 875
 876                 s->rwstate=SSL_WRITING;
 877                 n=BIO_flush(s->wbio);
 878                 if (n <= 0) return(n);
 879                 s->rwstate=SSL_NOTHING;
 880
 881                 /* We have flushed the buffer */
 882                 under=BIO_pop(s->wbio);
 883                 s->wbio=under;
 884                 BIO_free(s->bbio);
 885                 s->bbio=NULL;
 886                 ret=s->s3->delay_buf_pop_ret;
 887                 s->s3->delay_buf_pop_ret=0;
 888
 889                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 890                 }
 891         else
 892                 {
 893                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 894                         (char *)buf,len);
 895                 if (ret <= 0) return(ret);
 896                 }
 897
 898         return(ret);
 899         }
 900
 901 int ssl3_read(s,buf,len)
 902 SSL *s;
 903 char *buf;
 904 int len;
 905         {
 906         int ret;
 907
 908         clear_sys_error();
 909         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 910         s->s3->in_read_app_data=1;
 911         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 912         if ((ret == -1) && (s->s3->in_read_app_data == 0))
 913                 {
 914                 ERR_get_error(); /* clear the error */
 915                 s->s3->in_read_app_data=0;
 916                 s->in_handshake++;
 917                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 918                 s->in_handshake--;
 919                 }
 920         else
 921                 s->s3->in_read_app_data=0;
 922
 923         return(ret);
 924         }
 925
 926 int ssl3_peek(s,buf,len)
 927 SSL *s;
 928 char *buf;
 929 int len;
 930         {
 931         SSL3_RECORD *rr;
 932         int n;
 933
 934         rr= &(s->s3->rrec);
 935         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
 936                 {
 937                 n=ssl3_read(s,buf,1);
 938                 if (n <= 0) return(n);
 939                 rr->length++;
 940                 rr->off--;
 941                 }
 942
 943         if ((unsigned int)len > rr->length)
 944                 n=rr->length;
 945         else
 946                 n=len;
 947         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
 948         return(n);
 949         }
 950
 951 int ssl3_renegotiate(s)
 952 SSL *s;
 953         {
 954         if (s->handshake_func == NULL)
 955                 return(1);
 956
 957         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
 958                 return(0);
 959
 960         s->s3->renegotiate=1;
 961         return(1);
 962         }
 963
 964 int ssl3_renegotiate_check(s)
 965 SSL *s;
 966         {
 967         int ret=0;
 968
 969         if (s->s3->renegotiate)
 970                 {
 971                 if (    (s->s3->rbuf.left == 0) &&
 972                         (s->s3->wbuf.left == 0) &&
 973                         !SSL_in_init(s))
 974                         {
 975 /*
 976 if we are the server, and we have sent a 'RENEGOTIATE' message, we
 977 need to go to SSL_ST_ACCEPT.\1e
 978 */
 979                         /* SSL_ST_ACCEPT */
 980                         s->state=SSL_ST_RENEGOTIATE;
 981                         s->s3->renegotiate=0;
 982                         s->s3->num_renegotiations++;
 983                         s->s3->total_renegotiations++;
 984                         ret=1;
 985                         }
 986                 }
 987         return(ret);
 988         }
 989
 990