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 0.9.0b 29-Jun-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_ctrl,
 388         ssl3_ctx_ctrl,
 389         ssl3_get_cipher_by_char,
 390         ssl3_put_cipher_by_char,
 391         ssl3_pending,
 392         ssl3_num_ciphers,
 393         ssl3_get_cipher,
 394         ssl_bad_method,
 395         ssl3_default_timeout,
 396         &SSLv3_enc_data,
 397         };
 398
 399 static long ssl3_default_timeout()
 400         {
 401         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
 402          * is way too long for http, the cache would over fill */
 403         return(60*60*2);
 404         }
 405
 406 SSL_METHOD *sslv3_base_method()
 407         {
 408         return(&SSLv3_data);
 409         }
 410
 411 int ssl3_num_ciphers()
 412         {
 413         return(SSL3_NUM_CIPHERS);
 414         }
 415
 416 SSL_CIPHER *ssl3_get_cipher(u)
 417 unsigned int u;
 418         {
 419         if (u < SSL3_NUM_CIPHERS)
 420                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
 421         else
 422                 return(NULL);
 423         }
 424
 425 /* The problem is that it may not be the correct record type */
 426 int ssl3_pending(s)
 427 SSL *s;
 428         {
 429         return(s->s3->rrec.length);
 430         }
 431
 432 int ssl3_new(s)
 433 SSL *s;
 434         {
 435         SSL3_CTX *s3;
 436
 437         if ((s3=(SSL3_CTX *)Malloc(sizeof(SSL3_CTX))) == NULL) goto err;
 438         memset(s3,0,sizeof(SSL3_CTX));
 439
 440         s->s3=s3;
 441         /*
 442         s->s3->tmp.ca_names=NULL;
 443         s->s3->tmp.key_block=NULL;
 444         s->s3->tmp.key_block_length=0;
 445         s->s3->rbuf.buf=NULL;
 446         s->s3->wbuf.buf=NULL;
 447         */
 448
 449         s->method->ssl_clear(s);
 450         return(1);
 451 err:
 452         return(0);
 453         }
 454
 455 void ssl3_free(s)
 456 SSL *s;
 457         {
 458         ssl3_cleanup_key_block(s);
 459         if (s->s3->rbuf.buf != NULL)
 460                 Free(s->s3->rbuf.buf);
 461         if (s->s3->wbuf.buf != NULL)
 462                 Free(s->s3->wbuf.buf);
 463 #ifndef NO_DH
 464         if (s->s3->tmp.dh != NULL)
 465                 DH_free(s->s3->tmp.dh);
 466 #endif
 467         if (s->s3->tmp.ca_names != NULL)
 468                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 469         memset(s->s3,0,sizeof(SSL3_CTX));
 470         Free(s->s3);
 471         s->s3=NULL;
 472         }
 473
 474 void ssl3_clear(s)
 475 SSL *s;
 476         {
 477         unsigned char *rp,*wp;
 478
 479         ssl3_cleanup_key_block(s);
 480         if (s->s3->tmp.ca_names != NULL)
 481                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 482
 483         rp=s->s3->rbuf.buf;
 484         wp=s->s3->wbuf.buf;
 485
 486         memset(s->s3,0,sizeof(SSL3_CTX));
 487         if (rp != NULL) s->s3->rbuf.buf=rp;
 488         if (wp != NULL) s->s3->wbuf.buf=wp;
 489         s->packet_length=0;
 490         s->s3->renegotiate=0;
 491         s->s3->total_renegotiations=0;
 492         s->s3->num_renegotiations=0;
 493         s->s3->in_read_app_data=0;
 494         s->version=SSL3_VERSION;
 495         }
 496
 497 long ssl3_ctrl(s,cmd,larg,parg)
 498 SSL *s;
 499 int cmd;
 500 long larg;
 501 char *parg;
 502         {
 503         int ret=0;
 504
 505         switch (cmd)
 506                 {
 507         case SSL_CTRL_GET_SESSION_REUSED:
 508                 ret=s->hit;
 509                 break;
 510         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 511                 break;
 512         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 513                 ret=s->s3->num_renegotiations;
 514                 break;
 515         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 516                 ret=s->s3->num_renegotiations;
 517                 s->s3->num_renegotiations=0;
 518                 break;
 519         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 520                 ret=s->s3->total_renegotiations;
 521                 break;
 522         default:
 523                 break;
 524                 }
 525         return(ret);
 526         }
 527
 528 long ssl3_ctx_ctrl(ctx,cmd,larg,parg)
 529 SSL_CTX *ctx;
 530 int cmd;
 531 long larg;
 532 char *parg;
 533         {
 534         CERT *cert;
 535
 536         cert=ctx->default_cert;
 537
 538         switch (cmd)
 539                 {
 540 #ifndef NO_RSA
 541         case SSL_CTRL_NEED_TMP_RSA:
 542                 if (    (cert->rsa_tmp == NULL) &&
 543                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 544                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 545                         )
 546                         return(1);
 547                 else
 548                         return(0);
 549                 break;
 550         case SSL_CTRL_SET_TMP_RSA:
 551                 {
 552                 RSA *rsa;
 553                 int i;
 554
 555                 rsa=(RSA *)parg;
 556                 i=1;
 557                 if (rsa == NULL)
 558                         i=0;
 559                 else
 560                         {
 561                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 562                                 i=0;
 563                         }
 564                 if (!i)
 565                         {
 566                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 567                         return(0);
 568                         }
 569                 else
 570                         {
 571                         if (cert->rsa_tmp != NULL)
 572                                 RSA_free(cert->rsa_tmp);
 573                         cert->rsa_tmp=rsa;
 574                         return(1);
 575                         }
 576                 }
 577                 break;
 578         case SSL_CTRL_SET_TMP_RSA_CB:
 579                 cert->rsa_tmp_cb=(RSA *(*)())parg;
 580                 break;
 581 #endif
 582 #ifndef NO_DH
 583         case SSL_CTRL_SET_TMP_DH:
 584                 {
 585                 DH *new=NULL,*dh;
 586
 587                 dh=(DH *)parg;
 588                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 589                         (!DH_generate_key(new)))
 590                         {
 591                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 592                         if (new != NULL) DH_free(new);
 593                         return(0);
 594                         }
 595                 else
 596                         {
 597                         if (cert->dh_tmp != NULL)
 598                                 DH_free(cert->dh_tmp);
 599                         cert->dh_tmp=new;
 600                         return(1);
 601                         }
 602                 }
 603                 break;
 604         case SSL_CTRL_SET_TMP_DH_CB:
 605                 cert->dh_tmp_cb=(DH *(*)())parg;
 606                 break;
 607 #endif
 608         default:
 609                 return(0);
 610                 }
 611         return(1);
 612         }
 613
 614 /* This function needs to check if the ciphers required are actually
 615  * available */
 616 SSL_CIPHER *ssl3_get_cipher_by_char(p)
 617 unsigned char *p;
 618         {
 619         static int init=1;
 620         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
 621         SSL_CIPHER c,*cp= &c,**cpp;
 622         unsigned long id;
 623         int i;
 624
 625         if (init)
 626                 {
 627                 init=0;
 628
 629                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
 630                         sorted[i]= &(ssl3_ciphers[i]);
 631
 632                 qsort(  (char *)sorted,
 633                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 634                         FP_ICC ssl_cipher_ptr_id_cmp);
 635                 }
 636
 637         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
 638         c.id=id;
 639         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 640                 (char *)sorted,
 641                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 642                 (int (*)())ssl_cipher_ptr_id_cmp);
 643         if ((cpp == NULL) || !(*cpp)->valid)
 644                 return(NULL);
 645         else
 646                 return(*cpp);
 647         }
 648
 649 int ssl3_put_cipher_by_char(c,p)
 650 SSL_CIPHER *c;
 651 unsigned char *p;
 652         {
 653         long l;
 654
 655         if (p != NULL)
 656                 {
 657                 l=c->id;
 658                 if ((l & 0xff000000) != 0x03000000) return(0);
 659                 p[0]=((unsigned char)(l>> 8L))&0xFF;
 660                 p[1]=((unsigned char)(l     ))&0xFF;
 661                 }
 662         return(2);
 663         }
 664
 665 int ssl3_part_read(s,i)
 666 SSL *s;
 667 int i;
 668         {
 669         s->rwstate=SSL_READING;
 670
 671         if (i < 0)
 672                 {
 673                 return(i);
 674                 }
 675         else
 676                 {
 677                 s->init_num+=i;
 678                 return(0);
 679                 }
 680         }
 681
 682 SSL_CIPHER *ssl3_choose_cipher(s,have,pref)
 683 SSL *s;
 684 STACK *have,*pref;
 685         {
 686         SSL_CIPHER *c,*ret=NULL;
 687         int i,j,ok;
 688         CERT *cert;
 689         unsigned long alg,mask,emask;
 690
 691         /* Lets see which ciphers we can supported */
 692         if (s->cert != NULL)
 693                 cert=s->cert;
 694         else
 695                 cert=s->ctx->default_cert;
 696
 697         ssl_set_cert_masks(cert);
 698         mask=cert->mask;
 699         emask=cert->export_mask;
 700
 701         sk_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
 702
 703         for (i=0; i<sk_num(have); i++)
 704                 {
 705                 c=(SSL_CIPHER *)sk_value(have,i);
 706                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
 707                 if (alg & SSL_EXPORT)
 708                         {
 709                         ok=((alg & emask) == alg)?1:0;
 710 #ifdef CIPHER_DEBUG
 711                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 712 #endif
 713                         }
 714                 else
 715                         {
 716                         ok=((alg & mask) == alg)?1:0;
 717 #ifdef CIPHER_DEBUG
 718                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 719 #endif
 720                         }
 721
 722                 if (!ok) continue;
 723
 724                 j=sk_find(pref,(char *)c);
 725                 if (j >= 0)
 726                         {
 727                         ret=(SSL_CIPHER *)sk_value(pref,j);
 728                         break;
 729                         }
 730                 }
 731         return(ret);
 732         }
 733
 734 int ssl3_get_req_cert_type(s,p)
 735 SSL *s;
 736 unsigned char *p;
 737         {
 738         int ret=0;
 739         unsigned long alg;
 740
 741         alg=s->s3->tmp.new_cipher->algorithms;
 742
 743 #ifndef NO_DH
 744         if (alg & (SSL_kDHr|SSL_kEDH))
 745                 {
 746 #ifndef NO_RSA
 747                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
 748 #endif
 749 #ifndef NO_DSA
 750                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
 751 #endif
 752                 }
 753         if ((s->version == SSL3_VERSION) &&
 754                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
 755                 {
 756 #ifndef NO_RSA
 757                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
 758 #endif
 759 #ifndef NO_DSA
 760                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
 761 #endif
 762                 }
 763 #endif /* !NO_DH */
 764 #ifndef NO_RSA
 765         p[ret++]=SSL3_CT_RSA_SIGN;
 766 #endif
 767         p[ret++]=SSL3_CT_DSS_SIGN;
 768         return(ret);
 769         }
 770
 771 int ssl3_shutdown(s)
 772 SSL *s;
 773         {
 774
 775         /* Don't do anything much if we have not done the handshake or
 776          * we don't want to send messages :-) */
 777         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
 778                 {
 779                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 780                 return(1);
 781                 }
 782
 783         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
 784                 {
 785                 s->shutdown|=SSL_SENT_SHUTDOWN;
 786 #if 1
 787                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
 788 #endif
 789                 /* our shutdown alert has been sent now, and if it still needs
 790                  * to be written, s->s3->alert_dispatch will be true */
 791                 }
 792         else if (s->s3->alert_dispatch)
 793                 {
 794                 /* resend it if not sent */
 795 #if 1
 796                 ssl3_dispatch_alert(s);
 797 #endif
 798                 }
 799         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
 800                 {
 801                 /* If we are waiting for a close from our peer, we are closed */
 802                 ssl3_read_bytes(s,0,NULL,0);
 803                 }
 804
 805         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
 806                 !s->s3->alert_dispatch)
 807                 return(1);
 808         else
 809                 return(0);
 810         }
 811
 812 int ssl3_write(s,buf,len)
 813 SSL *s;
 814 char *buf;
 815 int len;
 816         {
 817         int ret,n;
 818         BIO *under;
 819
 820 #if 0
 821         if (s->shutdown & SSL_SEND_SHUTDOWN)
 822                 {
 823                 s->rwstate=SSL_NOTHING;
 824                 return(0);
 825                 }
 826 #endif
 827         clear_sys_error();
 828         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 829
 830         /* This is an experimental flag that sends the
 831          * last handshake message in the same packet as the first
 832          * use data - used to see if it helps the TCP protocol during
 833          * session-id reuse */
 834         /* The second test is because the buffer may have been removed */
 835         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
 836                 {
 837                 /* First time through, we write into the buffer */
 838                 if (s->s3->delay_buf_pop_ret == 0)
 839                         {
 840                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 841                                 (char *)buf,len);
 842                         if (ret <= 0) return(ret);
 843
 844                         s->s3->delay_buf_pop_ret=ret;
 845                         }
 846
 847                 s->rwstate=SSL_WRITING;
 848                 n=BIO_flush(s->wbio);
 849                 if (n <= 0) return(n);
 850                 s->rwstate=SSL_NOTHING;
 851
 852                 /* We have flushed the buffer */
 853                 under=BIO_pop(s->wbio);
 854                 s->wbio=under;
 855                 BIO_free(s->bbio);
 856                 s->bbio=NULL;
 857                 ret=s->s3->delay_buf_pop_ret;
 858                 s->s3->delay_buf_pop_ret=0;
 859
 860                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 861                 }
 862         else
 863                 {
 864                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 865                         (char *)buf,len);
 866                 if (ret <= 0) return(ret);
 867                 }
 868
 869         return(ret);
 870         }
 871
 872 int ssl3_read(s,buf,len)
 873 SSL *s;
 874 char *buf;
 875 int len;
 876         {
 877         int ret;
 878
 879         clear_sys_error();
 880         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 881         s->s3->in_read_app_data=1;
 882         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 883         if ((ret == -1) && (s->s3->in_read_app_data == 0))
 884                 {
 885                 ERR_get_error(); /* clear the error */
 886                 s->s3->in_read_app_data=0;
 887                 s->in_handshake++;
 888                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 889                 s->in_handshake--;
 890                 }
 891         else
 892                 s->s3->in_read_app_data=0;
 893
 894         return(ret);
 895         }
 896
 897 int ssl3_peek(s,buf,len)
 898 SSL *s;
 899 char *buf;
 900 int len;
 901         {
 902         SSL3_RECORD *rr;
 903         int n;
 904
 905         rr= &(s->s3->rrec);
 906         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
 907                 {
 908                 n=ssl3_read(s,buf,1);
 909                 if (n <= 0) return(n);
 910                 rr->length++;
 911                 rr->off--;
 912                 }
 913
 914         if ((unsigned int)len > rr->length)
 915                 n=rr->length;
 916         else
 917                 n=len;
 918         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
 919         return(n);
 920         }
 921
 922 int ssl3_renegotiate(s)
 923 SSL *s;
 924         {
 925         if (s->handshake_func == NULL)
 926                 return(1);
 927
 928         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
 929                 return(0);
 930
 931         s->s3->renegotiate=1;
 932         return(1);
 933         }
 934
 935 int ssl3_renegotiate_check(s)
 936 SSL *s;
 937         {
 938         int ret=0;
 939
 940         if (s->s3->renegotiate)
 941                 {
 942                 if (    (s->s3->rbuf.left == 0) &&
 943                         (s->s3->wbuf.left == 0) &&
 944                         !SSL_in_init(s))
 945                         {
 946 /*
 947 if we are the server, and we have sent a 'RENEGOTIATE' message, we
 948 need to go to SSL_ST_ACCEPT.\1e
 949 */
 950                         /* SSL_ST_ACCEPT */
 951                         s->state=SSL_ST_RENEGOTIATE;
 952                         s->s3->renegotiate=0;
 953                         s->s3->num_renegotiations++;
 954                         s->s3->total_renegotiations++;
 955                         ret=1;
 956                         }
 957                 }
 958         return(ret);
 959         }
 960
 961