ssl/s3_lib.c

   1 /* ssl/s3_lib.c */
   2 /* Copyright (C) 1995-1997 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 0.8.1b 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_196_CBC_SHA,
 135         SSL3_CK_ADH_DES_196_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 SSL_METHOD SSLv3_data= {
 362         3,
 363         ssl3_new,
 364         ssl3_clear,
 365         ssl3_free,
 366         ssl_undefined_function,
 367         ssl_undefined_function,
 368         ssl3_read,
 369         ssl3_peek,
 370         ssl3_write,
 371         ssl3_shutdown,
 372         ssl3_renegotiate,
 373         ssl3_ctrl,
 374         ssl3_ctx_ctrl,
 375         ssl3_get_cipher_by_char,
 376         ssl3_put_cipher_by_char,
 377         ssl3_pending,
 378         ssl3_num_ciphers,
 379         ssl3_get_cipher,
 380         ssl_bad_method,
 381         ssl3_default_timeout,
 382         };
 383
 384 static long ssl3_default_timeout()
 385         {
 386         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
 387          * is way too long for http, the cache would over fill */
 388         return(60*60*2);
 389         }
 390
 391 SSL_METHOD *sslv3_base_method()
 392         {
 393         return(&SSLv3_data);
 394         }
 395
 396 int ssl3_num_ciphers()
 397         {
 398         return(SSL3_NUM_CIPHERS);
 399         }
 400
 401 SSL_CIPHER *ssl3_get_cipher(u)
 402 unsigned int u;
 403         {
 404         if (u < SSL3_NUM_CIPHERS)
 405                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
 406         else
 407                 return(NULL);
 408         }
 409
 410 /* The problem is that it may not be the correct record type */
 411 int ssl3_pending(s)
 412 SSL *s;
 413         {
 414         return(s->s3->rrec.length);
 415         }
 416
 417 int ssl3_new(s)
 418 SSL *s;
 419         {
 420         SSL3_CTX *s3;
 421
 422         if ((s3=(SSL3_CTX *)Malloc(sizeof(SSL3_CTX))) == NULL) goto err;
 423
 424         s->s3=s3;
 425         s->s3->tmp.ca_names=NULL;
 426         s->s3->tmp.key_block=NULL;
 427         s->s3->rbuf.buf=NULL;
 428         s->s3->wbuf.buf=NULL;
 429
 430         ssl3_clear(s);
 431         return(1);
 432 err:
 433         return(0);
 434         }
 435
 436 void ssl3_free(s)
 437 SSL *s;
 438         {
 439         ssl3_cleanup_key_block(s);
 440         if (s->s3->rbuf.buf != NULL)
 441                 Free(s->s3->rbuf.buf);
 442         if (s->s3->wbuf.buf != NULL)
 443                 Free(s->s3->wbuf.buf);
 444 #ifndef NO_DH
 445         if (s->s3->tmp.dh != NULL)
 446                 DH_free(s->s3->tmp.dh);
 447 #endif
 448         if (s->s3->tmp.ca_names != NULL)
 449                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 450         memset(s->s3,0,sizeof(SSL3_CTX));
 451         Free(s->s3);
 452         s->s3=NULL;
 453         }
 454
 455 void ssl3_clear(s)
 456 SSL *s;
 457         {
 458         unsigned char *rp,*wp;
 459
 460         ssl3_cleanup_key_block(s);
 461         if (s->s3->tmp.ca_names != NULL)
 462                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
 463
 464         rp=s->s3->rbuf.buf;
 465         wp=s->s3->wbuf.buf;
 466
 467         memset(s->s3,0,sizeof(SSL3_CTX));
 468         if (rp != NULL)
 469                 {
 470                 s->packet= &(s->s3->rbuf.buf[0]);
 471                 s->s3->rbuf.buf=rp;
 472                 s->s3->wbuf.buf=wp;
 473                 }
 474         else
 475                 s->packet=NULL;
 476         s->packet_length=0;
 477         s->version=3;
 478         }
 479
 480 long ssl3_ctrl(s,cmd,larg,parg)
 481 SSL *s;
 482 int cmd;
 483 long larg;
 484 char *parg;
 485         {
 486         return(0);
 487         }
 488
 489 long ssl3_ctx_ctrl(ctx,cmd,larg,parg)
 490 SSL_CTX *ctx;
 491 int cmd;
 492 long larg;
 493 char *parg;
 494         {
 495         CERT *cert;
 496
 497         cert=ctx->default_cert;
 498
 499         switch (cmd)
 500                 {
 501 #ifndef NO_RSA
 502         case SSL_CTRL_NEED_TMP_RSA:
 503                 if (    (cert->rsa_tmp == NULL) &&
 504                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
 505                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
 506                         )
 507                         return(1);
 508                 else
 509                         return(0);
 510                 break;
 511         case SSL_CTRL_SET_TMP_RSA:
 512                 {
 513                 RSA *rsa;
 514                 int i;
 515
 516                 rsa=(RSA *)parg;
 517                 i=1;
 518                 if (rsa == NULL)
 519                         i=0;
 520                 else
 521                         {
 522                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
 523                                 i=0;
 524                         }
 525                 if (!i)
 526                         {
 527                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
 528                         return(0);
 529                         }
 530                 else
 531                         {
 532                         if (cert->rsa_tmp != NULL)
 533                                 RSA_free(cert->rsa_tmp);
 534                         cert->rsa_tmp=rsa;
 535                         return(1);
 536                         }
 537                 }
 538                 break;
 539         case SSL_CTRL_SET_TMP_RSA_CB:
 540                 cert->rsa_tmp_cb=(RSA *(*)())parg;
 541                 break;
 542 #endif
 543 #ifndef NO_DH
 544         case SSL_CTRL_SET_TMP_DH:
 545                 {
 546                 DH *new=NULL,*dh;
 547
 548                 dh=(DH *)parg;
 549                 if (    ((new=DHparams_dup(dh)) == NULL) ||
 550                         (!DH_generate_key(new)))
 551                         {
 552                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
 553                         if (new != NULL) DH_free(new);
 554                         return(0);
 555                         }
 556                 else
 557                         {
 558                         if (cert->dh_tmp != NULL)
 559                                 DH_free(cert->dh_tmp);
 560                         cert->dh_tmp=new;
 561                         return(1);
 562                         }
 563                 }
 564                 break;
 565         case SSL_CTRL_SET_TMP_DH_CB:
 566                 cert->dh_tmp_cb=(DH *(*)())parg;
 567                 break;
 568 #endif
 569         default:
 570                 return(0);
 571                 }
 572         return(1);
 573         }
 574
 575 /* This function needs to check if the ciphers required are actually
 576  * available */
 577 SSL_CIPHER *ssl3_get_cipher_by_char(p)
 578 unsigned char *p;
 579         {
 580         static int init=1;
 581         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
 582         SSL_CIPHER c,*cp= &c,**cpp;
 583         unsigned long id;
 584         int i;
 585
 586         if (init)
 587                 {
 588                 init=0;
 589
 590                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
 591                         sorted[i]= &(ssl3_ciphers[i]);
 592
 593                 qsort(  (char *)sorted,
 594                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 595                         FP_ICC ssl_cipher_ptr_id_cmp);
 596                 }
 597
 598         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
 599         c.id=id;
 600         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 601                 (char *)sorted,
 602                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 603                 (int (*)())ssl_cipher_ptr_id_cmp);
 604         if ((cpp == NULL) || !(*cpp)->valid)
 605                 return(NULL);
 606         else
 607                 return(*cpp);
 608         }
 609
 610 int ssl3_put_cipher_by_char(c,p)
 611 SSL_CIPHER *c;
 612 unsigned char *p;
 613         {
 614         long l;
 615
 616         if (p != NULL)
 617                 {
 618                 l=c->id;
 619                 if ((l & 0xff000000) != 0x03000000) return(0);
 620                 p[0]=((unsigned char)(l>> 8L))&0xFF;
 621                 p[1]=((unsigned char)(l     ))&0xFF;
 622                 }
 623         return(2);
 624         }
 625
 626 void ssl3_generate_key_block(s,km,num)
 627 SSL *s;
 628 unsigned char *km;
 629 int num;
 630         {
 631         MD5_CTX m5;
 632         SHA_CTX s1;
 633         unsigned char buf[8],smd[SHA_DIGEST_LENGTH];
 634         unsigned char c='A';
 635         int i,j,k;
 636
 637         k=0;
 638         for (i=0; i<num; i+=MD5_DIGEST_LENGTH)
 639                 {
 640                 k++;
 641                 for (j=0; j<k; j++)
 642                         buf[j]=c;
 643                 c++;
 644                 SHA1_Init(  &s1);
 645                 SHA1_Update(&s1,buf,k);
 646                 SHA1_Update(&s1,s->session->master_key,
 647                         s->session->master_key_length);
 648                 SHA1_Update(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
 649                 SHA1_Update(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
 650                 SHA1_Final( smd,&s1);
 651
 652                 MD5_Init(  &m5);
 653                 MD5_Update(&m5,s->session->master_key,
 654                         s->session->master_key_length);
 655                 MD5_Update(&m5,smd,SHA_DIGEST_LENGTH);
 656                 if ((i+MD5_DIGEST_LENGTH) > num)
 657                         {
 658                         MD5_Final(smd,&m5);
 659                         memcpy(km,smd,(num-i));
 660                         }
 661                 else
 662                         MD5_Final(km,&m5);
 663
 664                 km+=MD5_DIGEST_LENGTH;
 665                 }
 666         memset(smd,0,SHA_DIGEST_LENGTH);
 667         }
 668
 669 int ssl3_part_read(s,i)
 670 SSL *s;
 671 int i;
 672         {
 673         s->rwstate=SSL_READING;
 674
 675         if (i < 0)
 676                 {
 677                 return(i);
 678                 }
 679         else
 680                 {
 681                 s->init_num+=i;
 682                 return(0);
 683                 }
 684         }
 685
 686 SSL_CIPHER *ssl3_choose_cipher(s,have,pref)
 687 SSL *s;
 688 STACK *have,*pref;
 689         {
 690         SSL_CIPHER *c,*ret=NULL;
 691         int i,j,ok;
 692         CERT *cert;
 693         unsigned long alg,mask,emask;
 694
 695         /* Lets see which ciphers we can supported */
 696         if (s->cert != NULL)
 697                 cert=s->cert;
 698         else
 699                 cert=s->ctx->default_cert;
 700
 701         ssl_set_cert_masks(cert);
 702         mask=cert->mask;
 703         emask=cert->export_mask;
 704
 705         sk_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
 706
 707         for (i=0; i<sk_num(have); i++)
 708                 {
 709                 c=(SSL_CIPHER *)sk_value(have,i);
 710                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
 711                 if (alg & SSL_EXPORT)
 712                         {
 713                         ok=((alg & emask) == alg)?1:0;
 714 #ifdef CIPHER_DEBUG
 715                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 716 #endif
 717                         }
 718                 else
 719                         {
 720                         ok=((alg & mask) == alg)?1:0;
 721 #ifdef CIPHER_DEBUG
 722                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
 723 #endif
 724                         }
 725
 726                 if (!ok) continue;
 727
 728                 j=sk_find(pref,(char *)c);
 729                 if (j >= 0)
 730                         {
 731                         ret=(SSL_CIPHER *)sk_value(pref,j);
 732                         break;
 733                         }
 734                 }
 735         return(ret);
 736         }
 737
 738 int ssl3_get_req_cert_type(s,p)
 739 SSL *s;
 740 unsigned char *p;
 741         {
 742         int ret=0;
 743         unsigned long alg;
 744
 745         alg=s->s3->tmp.new_cipher->algorithms;
 746
 747 #ifndef NO_DH
 748         if (alg & (SSL_kDHr|SSL_kEDH))
 749                 {
 750 #ifndef NO_RSA
 751                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
 752 #endif
 753 #ifndef NO_DSA
 754                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
 755 #endif
 756                 }
 757         if (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr))
 758                 {
 759 #ifndef NO_RSA
 760                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
 761 #endif
 762 #ifndef NO_DSA
 763                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
 764 #endif
 765                 }
 766 #endif /* !NO_DH */
 767 #ifndef NO_RSA
 768         p[ret++]=SSL3_CT_RSA_SIGN;
 769 #endif
 770 /*      p[ret++]=SSL3_CT_DSS_SIGN; */
 771         return(ret);
 772         }
 773
 774 int ssl3_shutdown(s)
 775 SSL *s;
 776         {
 777
 778         /* Don't do anything much if we have not done the handshake or
 779          * we don't want to send messages :-) */
 780         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
 781                 {
 782                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 783                 return(1);
 784                 }
 785
 786         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
 787                 {
 788                 s->shutdown|=SSL_SENT_SHUTDOWN;
 789 #if 1
 790                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL3_AD_CLOSE_NOTIFY);
 791 #endif
 792                 /* our shutdown alert has been sent now, and if it still needs
 793                  * to be written, s->s3->alert_dispatch will be true */
 794                 }
 795         else if (s->s3->alert_dispatch)
 796                 {
 797                 /* resend it if not sent */
 798 #if 1
 799                 ssl3_dispatch_alert(s);
 800 #endif
 801                 }
 802         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
 803                 {
 804                 /* If we are waiting for a close from our peer, we are closed */
 805                 ssl3_read_bytes(s,0,NULL,0);
 806                 }
 807
 808         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
 809                 !s->s3->alert_dispatch)
 810                 return(1);
 811         else
 812                 return(0);
 813         }
 814
 815 int ssl3_write(s,buf,len)
 816 SSL *s;
 817 const char *buf;
 818 int len;
 819         {
 820         int ret,n;
 821         BIO *under;
 822
 823 #if 0
 824         if (s->shutdown & SSL_SEND_SHUTDOWN)
 825                 {
 826                 s->rwstate=SSL_NOTHING;
 827                 return(0);
 828                 }
 829 #endif
 830         errno=0;
 831
 832         /* This is an experimental flag that sends the
 833          * last handshake message in the same packet as the first
 834          * use data - used to see if it helps the TCP protocol during
 835          * session-id reuse */
 836         /* The second test is because the buffer may have been removed */
 837         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
 838                 {
 839                 /* First time through, we write into the buffer */
 840                 if (s->s3->delay_buf_pop_ret == 0)
 841                         {
 842                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 843                                 (char *)buf,len);
 844                         if (ret <= 0) return(ret);
 845
 846                         s->s3->delay_buf_pop_ret=ret;
 847                         }
 848
 849                 s->rwstate=SSL_WRITING;
 850                 n=BIO_flush(s->wbio);
 851                 if (n <= 0) return(n);
 852                 s->rwstate=SSL_NOTHING;
 853
 854                 /* We have flushed the buffer */
 855                 under=BIO_pop(s->wbio);
 856                 s->wbio=under;
 857                 BIO_free(s->bbio);
 858                 s->bbio=NULL;
 859                 ret=s->s3->delay_buf_pop_ret;
 860                 s->s3->delay_buf_pop_ret=0;
 861
 862                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 863                 }
 864         else
 865                 {
 866                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
 867                         (char *)buf,len);
 868                 if (ret <= 0) return(ret);
 869                 }
 870         return(ret);
 871         }
 872
 873 int ssl3_read(s,buf,len)
 874 SSL *s;
 875 char *buf;
 876 int len;
 877         {
 878         errno=0;
 879         return(ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len));
 880         }
 881
 882 int ssl3_peek(s,buf,len)
 883 SSL *s;
 884 char *buf;
 885 int len;
 886         {
 887         SSL3_RECORD *rr;
 888         int n;
 889
 890         rr= &(s->s3->rrec);
 891         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
 892                 return(0);
 893
 894         if ((unsigned int)len > rr->length)
 895                 n=rr->length;
 896         else
 897                 n=len;
 898         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
 899         return(n);
 900         }
 901
 902 int ssl3_renegotiate(s)
 903 SSL *s;
 904         {
 905         if (s->handshake_func == NULL)
 906                 return(1);
 907
 908         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
 909                 return(0);
 910
 911         if (!SSL_in_init(s))
 912                 s->state=SSL_ST_RENEGOTIATE;
 913         return(1);
 914         }
 915