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_EXP40|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_EXP40|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_EXP40|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_EXP40|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_EXP40|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_EXP40|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_EXP40|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_EXP40|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_EXP40|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         /* New TLS Export CipherSuites */
 359         /* Cipher 60 */
 360             {
 361             1,
 362             TLS1_TXT_RSA_EXPORT56_WITH_RC4_56_MD5,
 363             TLS1_CK_RSA_EXPORT56_WITH_RC4_56_MD5,
 364             SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_EXP56|SSL_TLSV1,
 365             0,
 366             SSL_ALL_CIPHERS
 367             },
 368         /* Cipher 61 */
 369             {
 370             1,
 371             TLS1_TXT_RSA_EXPORT56_WITH_RC2_CBC_56_MD5,
 372             TLS1_CK_RSA_EXPORT56_WITH_RC2_CBC_56_MD5,
 373             SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_EXP56|SSL_TLSV1,
 374             0,
 375             SSL_ALL_CIPHERS
 376             },
 377         /* Cipher 62 */
 378             {
 379             1,
 380             TLS1_TXT_RSA_EXPORT56_WITH_DES_CBC_SHA,
 381             TLS1_CK_RSA_EXPORT56_WITH_DES_CBC_SHA,
 382             SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA|SSL_EXP56|SSL_TLSV1,
 383             0,
 384             SSL_ALL_CIPHERS
 385             },
 386
 387 /* end of list */
 388         };
 389
 390 static SSL3_ENC_METHOD SSLv3_enc_data={
 391         ssl3_enc,
 392         ssl3_mac,
 393         ssl3_setup_key_block,
 394         ssl3_generate_master_secret,
 395         ssl3_change_cipher_state,
 396         ssl3_final_finish_mac,
 397         MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
 398         ssl3_cert_verify_mac,
 399         SSL3_MD_CLIENT_FINISHED_CONST,4,
 400         SSL3_MD_SERVER_FINISHED_CONST,4,
 401         ssl3_alert_code,
 402         };
 403
 404 static SSL_METHOD SSLv3_data= {
 405         SSL3_VERSION,
 406         ssl3_new,
 407         ssl3_clear,
 408         ssl3_free,
 409         ssl_undefined_function,
 410         ssl_undefined_function,
 411         ssl3_read,
 412         ssl3_peek,
 413         ssl3_write,
 414         ssl3_shutdown,
 415         ssl3_renegotiate,
 416         ssl3_renegotiate_check,
 417         ssl3_ctrl,
 418         ssl3_ctx_ctrl,
 419         ssl3_get_cipher_by_char,
 420         ssl3_put_cipher_by_char,
 421         ssl3_pending,
 422         ssl3_num_ciphers,
 423         ssl3_get_cipher,
 424         ssl_bad_method,
 425         ssl3_default_timeout,
 426         &SSLv3_enc_data,
 427         };
 428
 429 static long ssl3_default_timeout()
 430         {
 431         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
 432          * is way too long for http, the cache would over fill */
 433         return(60*60*2);
 434         }
 435
 436 SSL_METHOD *sslv3_base_method()
 437         {
 438         return(&SSLv3_data);
 439         }
 440
 441 int ssl3_num_ciphers()
 442         {
 443         return(SSL3_NUM_CIPHERS);
 444         }
 445
 446 SSL_CIPHER *ssl3_get_cipher(u)
 447 unsigned int u;
 448         {
 449         if (u < SSL3_NUM_CIPHERS)
 450                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
 451         else
 452                 return(NULL);
 453         }
 454
 455 /* The problem is that it may not be the correct record type */
 456 int ssl3_pending(s)
 457 SSL *s;
 458         {
 459         return(s->s3->rrec.length);
 460         }
 461
 462 int ssl3_new(s)
 463 SSL *s;
 464         {
 465         SSL3_CTX *s3;
 466
 467         if ((s3=(SSL3_CTX *)Malloc(sizeof(SSL3_CTX))) == NULL) goto err;
 468         memset(s3,0,sizeof(SSL3_CTX));
 469
 470         s->s3=s3;
 471         /*
 472         s->s3->tmp.ca_names=NULL;
 473         s->s3->tmp.key_block=NULL;
 474         s->s3->tmp.key_block_length=0;
 475         s->s3->rbuf.buf=NULL;
 476         s->s3->wbuf.buf=NULL;
 477         */
 478
 479         s->method->ssl_clear(s);
 480         return(1);
 481 err:
 482         return(0);
 483         }
 484
 485 void ssl3_free(s)
 486 SSL *s;
 487         {
 488         if(s == NULL)
 489             return;
 490
 491         ssl3_cleanup_key_block(s);
 492         if (s->s3->rbuf.buf != NULL)
 493                 Free(s->s3->rbuf.buf);
 494         if (s->s3->wbuf.buf != NULL)
 495                 Free(s->s3->wbuf.buf);
 496         if (s->s3->rrec.comp != NULL)
 497                 Free(s->s3->rrec.comp);
 498 #ifndef NO_DH
 499         if (s->s3->tmp.dh != NULL)
 500                 DH_free(s->s3->tmp.dh);
 501 #endif
 502         if (s->s3->tmp.ca_names != NULL)
 503                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 504         memset(s->s3,0,sizeof(SSL3_CTX));
 505         Free(s->s3);
 506         s->s3=NULL;
 507         }
 508
 509 void ssl3_clear(s)
 510 SSL *s;
 511         {
 512         unsigned char *rp,*wp;
 513
 514         ssl3_cleanup_key_block(s);
 515         if (s->s3->tmp.ca_names != NULL)
 516                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 517
 518         if (s->s3->rrec.comp != NULL)
 519                 {
 520                 Free(s->s3->rrec.comp);
 521                 s->s3->rrec.comp=NULL;
 522                 }
 523
 524         rp=s->s3->rbuf.buf;
 525         wp=s->s3->wbuf.buf;
 526
 527         memset(s->s3,0,sizeof(SSL3_CTX));
 528         if (rp != NULL) s->s3->rbuf.buf=rp;
 529         if (wp != NULL) s->s3->wbuf.buf=wp;
 530
 531         ssl_free_wbio_buffer(s);
 532
 533         s->packet_length=0;
 534         s->s3->renegotiate=0;
 535         s->s3->total_renegotiations=0;
 536         s->s3->num_renegotiations=0;
 537         s->s3->in_read_app_data=0;
 538         s->version=SSL3_VERSION;
 539         }
 540
 541 long ssl3_ctrl(s,cmd,larg,parg)
 542 SSL *s;
 543 int cmd;
 544 long larg;
 545 char *parg;
 546         {
 547         int ret=0;
 548
 549         switch (cmd)
 550                 {
 551         case SSL_CTRL_GET_SESSION_REUSED:
 552                 ret=s->hit;
 553                 break;
 554         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
 555                 break;
 556         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
 557                 ret=s->s3->num_renegotiations;
 558                 break;
 559         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
 560                 ret=s->s3->num_renegotiations;
 561                 s->s3->num_renegotiations=0;
 562                 break;
 563         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
 564                 ret=s->s3->total_renegotiations;
 565                 break;
 566         case SSL_CTRL_GET_FLAGS:
 567                 ret=(int)(s->s3->flags);
 568                 break;
 569         default:
 570                 break;
 571                 }
 572         return(ret);
 573         }
 574
 575 long ssl3_ctx_ctrl(ctx,cmd,larg,parg)
 576 SSL_CTX *ctx;
 577 int cmd;
 578 long larg;
 579 char *parg;
 580         {
 581         CERT *cert;
 582
 583         cert=ctx->default_cert;
 584
 585         switch (cmd)
 586                 {
 587 #ifndef NO_RSA
 588         case SSL_CTRL_NEED_TMP_RSA:
 589                 if (    (cert->rsa_tmp == NULL) &&
 590                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 591                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 592                         )
 593                         return(1);
 594                 else
 595                         return(0);
 596                 /* break; */
 597         case SSL_CTRL_SET_TMP_RSA:
 598                 {
 599                 RSA *rsa;
 600                 int i;
 601
 602                 rsa=(RSA *)parg;
 603                 i=1;
 604                 if (rsa == NULL)
 605                         i=0;
 606                 else
 607                         {
 608                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 609                                 i=0;
 610                         }
 611                 if (!i)
 612                         {
 613                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 614                         return(0);
 615                         }
 616                 else
 617                         {
 618                         if (cert->rsa_tmp != NULL)
 619                                 RSA_free(cert->rsa_tmp);
 620                         cert->rsa_tmp=rsa;
 621                         return(1);
 622                         }
 623                 }
 624                 /* break; */
 625         case SSL_CTRL_SET_TMP_RSA_CB:
 626 #ifndef NOPROTO
 627                 cert->rsa_tmp_cb=(RSA *(*)(SSL *, int, int))parg;
 628 #else
 629                 cert->rsa_tmp_cb=(RSA *(*)())parg;
 630 #endif
 631                 break;
 632 #endif
 633 #ifndef NO_DH
 634         case SSL_CTRL_SET_TMP_DH:
 635                 {
 636                 DH *new=NULL,*dh;
 637                 int rret=0;
 638
 639                 dh=(DH *)parg;
 640                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 641                         (!DH_generate_key(new)))
 642                         {
 643                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 644                         if (new != NULL) DH_free(new);
 645                         }
 646                 else
 647                         {
 648                         if (cert->dh_tmp != NULL)
 649                                 DH_free(cert->dh_tmp);
 650                         cert->dh_tmp=new;
 651                         rret=1;
 652                         }
 653                 return(rret);
 654                 }
 655                 /*break; */
 656         case SSL_CTRL_SET_TMP_DH_CB:
 657 #ifndef NOPROTO
 658                 cert->dh_tmp_cb=(DH *(*)(SSL *, int, int))parg;
 659 #else
 660                 cert->dh_tmp_cb=(DH *(*)())parg;
 661 #endif
 662                 break;
 663 #endif
 664         /* A Thawte special :-) */
 665         case SSL_CTRL_EXTRA_CHAIN_CERT:
 666                 if (ctx->extra_certs == NULL)
 667                         {
 668                         if ((ctx->extra_certs=sk_new_null()) == NULL)
 669                                 return(0);
 670                         }
 671                 sk_push(ctx->extra_certs,(char *)parg);
 672                 break;
 673
 674         default:
 675                 return(0);
 676                 }
 677         return(1);
 678         }
 679
 680 /* This function needs to check if the ciphers required are actually
 681  * available */
 682 SSL_CIPHER *ssl3_get_cipher_by_char(p)
 683 const unsigned char *p;
 684         {
 685         static int init=1;
 686         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
 687         SSL_CIPHER c,*cp= &c,**cpp;
 688         unsigned long id;
 689         int i;
 690
 691         if (init)
 692                 {
 693                 init=0;
 694
 695                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
 696                         sorted[i]= &(ssl3_ciphers[i]);
 697
 698                 qsort(  (char *)sorted,
 699                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 700                         FP_ICC ssl_cipher_ptr_id_cmp);
 701                 }
 702
 703         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
 704         c.id=id;
 705         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 706                 (char *)sorted,
 707                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 708                 (int (*)())ssl_cipher_ptr_id_cmp);
 709         if ((cpp == NULL) || !(*cpp)->valid)
 710                 return(NULL);
 711         else
 712                 return(*cpp);
 713         }
 714
 715 int ssl3_put_cipher_by_char(c,p)
 716 const SSL_CIPHER *c;
 717 unsigned char *p;
 718         {
 719         long l;
 720
 721         if (p != NULL)
 722                 {
 723                 l=c->id;
 724                 if ((l & 0xff000000) != 0x03000000) return(0);
 725                 p[0]=((unsigned char)(l>> 8L))&0xFF;
 726                 p[1]=((unsigned char)(l     ))&0xFF;
 727                 }
 728         return(2);
 729         }
 730
 731 int ssl3_part_read(s,i)
 732 SSL *s;
 733 int i;
 734         {
 735         s->rwstate=SSL_READING;
 736
 737         if (i < 0)
 738                 {
 739                 return(i);
 740                 }
 741         else
 742                 {
 743                 s->init_num+=i;
 744                 return(0);
 745                 }
 746         }
 747
 748 SSL_CIPHER *ssl3_choose_cipher(s,have,pref)
 749 SSL *s;
 750 STACK *have,*pref;
 751         {
 752         SSL_CIPHER *c,*ret=NULL;
 753         int i,j,ok;
 754         CERT *cert;
 755         unsigned long alg,mask,emask;
 756
 757         /* Lets see which ciphers we can supported */
 758         if (s->cert != NULL)
 759                 cert=s->cert;
 760         else
 761                 cert=s->ctx->default_cert;
 762
 763         sk_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
 764
 765         for (i=0; i<sk_num(have); i++)
 766                 {
 767                 c=(SSL_CIPHER *)sk_value(have,i);
 768
 769                 ssl_set_cert_masks(cert,c);
 770                 mask=cert->mask;
 771                 emask=cert->export_mask;
 772
 773                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
 774                 if (SSL_IS_EXPORT(alg))
 775                         {
 776                         ok=((alg & emask) == alg)?1:0;
 777 #ifdef CIPHER_DEBUG
 778                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 779 #endif
 780                         }
 781                 else
 782                         {
 783                         ok=((alg & mask) == alg)?1:0;
 784 #ifdef CIPHER_DEBUG
 785                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 786 #endif
 787                         }
 788
 789                 if (!ok) continue;
 790
 791                 j=sk_find(pref,(char *)c);
 792                 if (j >= 0)
 793                         {
 794                         ret=(SSL_CIPHER *)sk_value(pref,j);
 795                         break;
 796                         }
 797                 }
 798         return(ret);
 799         }
 800
 801 int ssl3_get_req_cert_type(s,p)
 802 SSL *s;
 803 unsigned char *p;
 804         {
 805         int ret=0;
 806         unsigned long alg;
 807
 808         alg=s->s3->tmp.new_cipher->algorithms;
 809
 810 #ifndef NO_DH
 811         if (alg & (SSL_kDHr|SSL_kEDH))
 812                 {
 813 #  ifndef NO_RSA
 814                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
 815 #  endif
 816 #  ifndef NO_DSA
 817                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
 818 #  endif
 819                 }
 820         if ((s->version == SSL3_VERSION) &&
 821                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
 822                 {
 823 #  ifndef NO_RSA
 824                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
 825 #  endif
 826 #  ifndef NO_DSA
 827                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
 828 #  endif
 829                 }
 830 #endif /* !NO_DH */
 831 #ifndef NO_RSA
 832         p[ret++]=SSL3_CT_RSA_SIGN;
 833 #endif
 834 #ifndef NO_DSA
 835         p[ret++]=SSL3_CT_DSS_SIGN;
 836 #endif
 837         return(ret);
 838         }
 839
 840 int ssl3_shutdown(s)
 841 SSL *s;
 842         {
 843
 844         /* Don't do anything much if we have not done the handshake or
 845          * we don't want to send messages :-) */
 846         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
 847                 {
 848                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 849                 return(1);
 850                 }
 851
 852         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
 853                 {
 854                 s->shutdown|=SSL_SENT_SHUTDOWN;
 855 #if 1
 856                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
 857 #endif
 858                 /* our shutdown alert has been sent now, and if it still needs
 859                  * to be written, s->s3->alert_dispatch will be true */
 860                 }
 861         else if (s->s3->alert_dispatch)
 862                 {
 863                 /* resend it if not sent */
 864 #if 1
 865                 ssl3_dispatch_alert(s);
 866 #endif
 867                 }
 868         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
 869                 {
 870                 /* If we are waiting for a close from our peer, we are closed */
 871                 ssl3_read_bytes(s,0,NULL,0);
 872                 }
 873
 874         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
 875                 !s->s3->alert_dispatch)
 876                 return(1);
 877         else
 878                 return(0);
 879         }
 880
 881 int ssl3_write(s,buf,len)
 882 SSL *s;
 883 const char *buf;
 884 int len;
 885         {
 886         int ret,n;
 887
 888 #if 0
 889         if (s->shutdown & SSL_SEND_SHUTDOWN)
 890                 {
 891                 s->rwstate=SSL_NOTHING;
 892                 return(0);
 893                 }
 894 #endif
 895         clear_sys_error();
 896         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 897
 898         /* This is an experimental flag that sends the
 899          * last handshake message in the same packet as the first
 900          * use data - used to see if it helps the TCP protocol during
 901          * session-id reuse */
 902         /* The second test is because the buffer may have been removed */
 903         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
 904                 {
 905                 /* First time through, we write into the buffer */
 906                 if (s->s3->delay_buf_pop_ret == 0)
 907                         {
 908                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 909                                 (char *)buf,len);
 910                         if (ret <= 0) return(ret);
 911
 912                         s->s3->delay_buf_pop_ret=ret;
 913                         }
 914
 915                 s->rwstate=SSL_WRITING;
 916                 n=BIO_flush(s->wbio);
 917                 if (n <= 0) return(n);
 918                 s->rwstate=SSL_NOTHING;
 919
 920                 /* We have flushed the buffer, so remove it */
 921                 ssl_free_wbio_buffer(s);
 922                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 923
 924                 ret=s->s3->delay_buf_pop_ret;
 925                 s->s3->delay_buf_pop_ret=0;
 926                 }
 927         else
 928                 {
 929                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 930                         (char *)buf,len);
 931                 if (ret <= 0) return(ret);
 932                 }
 933
 934         return(ret);
 935         }
 936
 937 int ssl3_read(s,buf,len)
 938 SSL *s;
 939 char *buf;
 940 int len;
 941         {
 942         int ret;
 943
 944         clear_sys_error();
 945         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
 946         s->s3->in_read_app_data=1;
 947         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 948         if ((ret == -1) && (s->s3->in_read_app_data == 0))
 949                 {
 950                 ERR_get_error(); /* clear the error */
 951                 s->s3->in_read_app_data=0;
 952                 s->in_handshake++;
 953                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
 954                 s->in_handshake--;
 955                 }
 956         else
 957                 s->s3->in_read_app_data=0;
 958
 959         return(ret);
 960         }
 961
 962 int ssl3_peek(s,buf,len)
 963 SSL *s;
 964 char *buf;
 965 int len;
 966         {
 967         SSL3_RECORD *rr;
 968         int n;
 969
 970         rr= &(s->s3->rrec);
 971         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
 972                 {
 973                 n=ssl3_read(s,buf,1);
 974                 if (n <= 0) return(n);
 975                 rr->length++;
 976                 rr->off--;
 977                 }
 978
 979         if ((unsigned int)len > rr->length)
 980                 n=rr->length;
 981         else
 982                 n=len;
 983         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
 984         return(n);
 985         }
 986
 987 int ssl3_renegotiate(s)
 988 SSL *s;
 989         {
 990         if (s->handshake_func == NULL)
 991                 return(1);
 992
 993         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
 994                 return(0);
 995
 996         s->s3->renegotiate=1;
 997         return(1);
 998         }
 999
1000 int ssl3_renegotiate_check(s)
1001 SSL *s;
1002         {
1003         int ret=0;
1004
1005         if (s->s3->renegotiate)
1006                 {
1007                 if (    (s->s3->rbuf.left == 0) &&
1008                         (s->s3->wbuf.left == 0) &&
1009                         !SSL_in_init(s))
1010                         {
1011 /*
1012 if we are the server, and we have sent a 'RENEGOTIATE' message, we
1013 need to go to SSL_ST_ACCEPT.\1e
1014 */
1015                         /* SSL_ST_ACCEPT */
1016                         s->state=SSL_ST_RENEGOTIATE;
1017                         s->s3->renegotiate=0;
1018                         s->s3->num_renegotiations++;
1019                         s->s3->total_renegotiations++;
1020                         ret=1;
1021                         }
1022                 }
1023         return(ret);
1024         }
1025