ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60
  61 #include <stdio.h>
  62 #include "objects.h"
  63 #include "lhash.h"
  64 #include "ssl_locl.h"
  65
  66 char *SSL_version_str="OpenSSL 0.9.2 31-Dec-1998";
  67
  68 static STACK *ssl_meth=NULL;
  69 static STACK *ssl_ctx_meth=NULL;
  70 static int ssl_meth_num=0;
  71 static int ssl_ctx_meth_num=0;
  72
  73 SSL3_ENC_METHOD ssl3_undef_enc_method={
  74         ssl_undefined_function,
  75         ssl_undefined_function,
  76         ssl_undefined_function,
  77         ssl_undefined_function,
  78         ssl_undefined_function,
  79         ssl_undefined_function,
  80         };
  81
  82 int SSL_clear(SSL *s)
  83         {
  84         int state;
  85
  86         if (s->method == NULL)
  87                 {
  88                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
  89                 return(0);
  90                 }
  91
  92         s->error=0;
  93         s->hit=0;
  94         s->shutdown=0;
  95
  96 #if 0
  97         /* This is set if we are doing dynamic renegotiation so keep
  98          * the old cipher.  It is sort of a SSL_clear_lite :-) */
  99         if (s->new_session) return(1);
 100 #endif
 101
 102         state=s->state; /* Keep to check if we throw away the session-id */
 103         s->type=0;
 104
 105         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 106
 107         s->version=s->method->version;
 108         s->client_version=s->version;
 109         s->rwstate=SSL_NOTHING;
 110         s->rstate=SSL_ST_READ_HEADER;
 111         s->read_ahead=s->ctx->read_ahead;
 112
 113         if (s->init_buf != NULL)
 114                 {
 115                 BUF_MEM_free(s->init_buf);
 116                 s->init_buf=NULL;
 117                 }
 118
 119         ssl_clear_cipher_ctx(s);
 120
 121         if (ssl_clear_bad_session(s))
 122                 {
 123                 SSL_SESSION_free(s->session);
 124                 s->session=NULL;
 125                 }
 126
 127         s->first_packet=0;
 128
 129 #if 1
 130         /* Check to see if we were changed into a different method, if
 131          * so, revert back if we are not doing session-id reuse. */
 132         if ((s->session == NULL) && (s->method != s->ctx->method))
 133                 {
 134                 s->method->ssl_free(s);
 135                 s->method=s->ctx->method;
 136                 if (!s->method->ssl_new(s))
 137                         return(0);
 138                 }
 139         else
 140 #endif
 141                 s->method->ssl_clear(s);
 142         return(1);
 143         }
 144
 145 /** Used to change an SSL_CTXs default SSL method type */
 146 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
 147         {
 148         STACK *sk;
 149
 150         ctx->method=meth;
 151
 152         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 153                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 154         if ((sk == NULL) || (sk_num(sk) <= 0))
 155                 {
 156                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 157                 return(0);
 158                 }
 159         return(1);
 160         }
 161
 162 SSL *SSL_new(SSL_CTX *ctx)
 163         {
 164         SSL *s;
 165
 166         if (ctx == NULL)
 167                 {
 168                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 169                 return(NULL);
 170                 }
 171         if (ctx->method == NULL)
 172                 {
 173                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 174                 return(NULL);
 175                 }
 176
 177         s=(SSL *)Malloc(sizeof(SSL));
 178         if (s == NULL) goto err;
 179         memset(s,0,sizeof(SSL));
 180
 181         if (ctx->default_cert != NULL)
 182                 {
 183                 CRYPTO_add(&ctx->default_cert->references,1,
 184                         CRYPTO_LOCK_SSL_CERT);
 185                 s->cert=ctx->default_cert;
 186                 }
 187         else
 188                 s->cert=NULL;
 189         s->verify_mode=ctx->verify_mode;
 190         s->verify_callback=ctx->default_verify_callback;
 191         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 192         s->ctx=ctx;
 193
 194         s->verify_result=X509_V_OK;
 195
 196         s->method=ctx->method;
 197
 198         if (!s->method->ssl_new(s))
 199                 {
 200                 SSL_CTX_free(ctx);
 201                 Free(s);
 202                 goto err;
 203                 }
 204
 205         s->quiet_shutdown=ctx->quiet_shutdown;
 206         s->references=1;
 207         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 208         s->options=ctx->options;
 209         SSL_clear(s);
 210
 211         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
 212
 213         return(s);
 214 err:
 215         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 216         return(NULL);
 217         }
 218
 219 void SSL_free(SSL *s)
 220         {
 221         int i;
 222
 223         if(s == NULL)
 224             return;
 225
 226         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 227 #ifdef REF_PRINT
 228         REF_PRINT("SSL",s);
 229 #endif
 230         if (i > 0) return;
 231 #ifdef REF_CHECK
 232         if (i < 0)
 233                 {
 234                 fprintf(stderr,"SSL_free, bad reference count\n");
 235                 abort(); /* ok */
 236                 }
 237 #endif
 238
 239         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 240
 241         if (s->bbio != NULL)
 242                 {
 243                 /* If the buffering BIO is in place, pop it off */
 244                 if (s->bbio == s->wbio)
 245                         {
 246                         s->wbio=BIO_pop(s->wbio);
 247                         }
 248                 BIO_free(s->bbio);
 249                 s->bbio=NULL;
 250                 }
 251         if (s->rbio != NULL)
 252                 BIO_free_all(s->rbio);
 253         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 254                 BIO_free_all(s->wbio);
 255
 256         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 257
 258         /* add extra stuff */
 259         if (s->cipher_list != NULL) sk_free(s->cipher_list);
 260         if (s->cipher_list_by_id != NULL) sk_free(s->cipher_list_by_id);
 261
 262         /* Make the next call work :-) */
 263         if (s->session != NULL)
 264                 {
 265                 ssl_clear_bad_session(s);
 266                 SSL_SESSION_free(s->session);
 267                 }
 268
 269         ssl_clear_cipher_ctx(s);
 270
 271         if (s->cert != NULL) ssl_cert_free(s->cert);
 272         /* Free up if allocated */
 273
 274         if (s->ctx) SSL_CTX_free(s->ctx);
 275
 276         if (s->client_CA != NULL)
 277                 sk_pop_free(s->client_CA,X509_NAME_free);
 278
 279         if (s->method != NULL) s->method->ssl_free(s);
 280
 281         Free((char *)s);
 282         }
 283
 284 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 285         {
 286         /* If the output buffering BIO is still in place, remove it
 287          */
 288         if (s->bbio != NULL)
 289                 {
 290                 if (s->wbio == s->bbio)
 291                         {
 292                         s->wbio=s->wbio->next_bio;
 293                         s->bbio->next_bio=NULL;
 294                         }
 295                 }
 296         if ((s->rbio != NULL) && (s->rbio != rbio))
 297                 BIO_free_all(s->rbio);
 298         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 299                 BIO_free_all(s->wbio);
 300         s->rbio=rbio;
 301         s->wbio=wbio;
 302         }
 303
 304 BIO *SSL_get_rbio(SSL *s)
 305         { return(s->rbio); }
 306
 307 BIO *SSL_get_wbio(SSL *s)
 308         { return(s->wbio); }
 309
 310 int SSL_get_fd(SSL *s)
 311         {
 312         int ret= -1;
 313         BIO *b,*r;
 314
 315         b=SSL_get_rbio(s);
 316         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 317         if (r != NULL)
 318                 BIO_get_fd(r,&ret);
 319         return(ret);
 320         }
 321
 322 #ifndef NO_SOCK
 323 int SSL_set_fd(SSL *s,int fd)
 324         {
 325         int ret=0;
 326         BIO *bio=NULL;
 327
 328         bio=BIO_new(BIO_s_socket());
 329
 330         if (bio == NULL)
 331                 {
 332                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 333                 goto err;
 334                 }
 335         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 336         SSL_set_bio(s,bio,bio);
 337         ret=1;
 338 err:
 339         return(ret);
 340         }
 341
 342 int SSL_set_wfd(SSL *s,int fd)
 343         {
 344         int ret=0;
 345         BIO *bio=NULL;
 346
 347         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 348                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 349                 {
 350                 bio=BIO_new(BIO_s_socket());
 351
 352                 if (bio == NULL)
 353                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 354                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 355                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 356                 }
 357         else
 358                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 359         ret=1;
 360 err:
 361         return(ret);
 362         }
 363
 364 int SSL_set_rfd(SSL *s,int fd)
 365         {
 366         int ret=0;
 367         BIO *bio=NULL;
 368
 369         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 370                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 371                 {
 372                 bio=BIO_new(BIO_s_socket());
 373
 374                 if (bio == NULL)
 375                         {
 376                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 377                         goto err;
 378                         }
 379                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 380                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 381                 }
 382         else
 383                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 384         ret=1;
 385 err:
 386         return(ret);
 387         }
 388 #endif
 389
 390 int SSL_get_verify_mode(SSL *s)
 391         {
 392         return(s->verify_mode);
 393         }
 394
 395 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
 396         {
 397         return(s->verify_callback);
 398         }
 399
 400 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
 401         {
 402         return(ctx->verify_mode);
 403         }
 404
 405 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
 406         {
 407         return(ctx->default_verify_callback);
 408         }
 409
 410 void SSL_set_verify(SSL *s,int mode,
 411                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 412         {
 413         s->verify_mode=mode;
 414         if (callback != NULL)
 415                 s->verify_callback=callback;
 416         }
 417
 418 void SSL_set_read_ahead(SSL *s,int yes)
 419         {
 420         s->read_ahead=yes;
 421         }
 422
 423 int SSL_get_read_ahead(SSL *s)
 424         {
 425         return(s->read_ahead);
 426         }
 427
 428 int SSL_pending(SSL *s)
 429         {
 430         return(s->method->ssl_pending(s));
 431         }
 432
 433 X509 *SSL_get_peer_certificate(SSL *s)
 434         {
 435         X509 *r;
 436
 437         if ((s == NULL) || (s->session == NULL))
 438                 r=NULL;
 439         else
 440                 r=s->session->peer;
 441
 442         if (r == NULL) return(r);
 443
 444         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 445
 446         return(r);
 447         }
 448
 449 STACK *SSL_get_peer_cert_chain(SSL *s)
 450         {
 451         STACK *r;
 452
 453         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
 454                 r=NULL;
 455         else
 456                 r=s->session->cert->cert_chain;
 457
 458         return(r);
 459         }
 460
 461 /* Now in theory, since the calling process own 't' it should be safe to
 462  * modify.  We need to be able to read f without being hassled */
 463 void SSL_copy_session_id(SSL *t,SSL *f)
 464         {
 465         CERT *tmp;
 466
 467         /* Do we need to to SSL locking? */
 468         SSL_set_session(t,SSL_get_session(f));
 469
 470         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 471          * vice-versa */
 472         if (t->method != f->method)
 473                 {
 474                 t->method->ssl_free(t); /* cleanup current */
 475                 t->method=f->method;    /* change method */
 476                 t->method->ssl_new(t);  /* setup new */
 477                 }
 478
 479         tmp=t->cert;
 480         if (f->cert != NULL)
 481                 {
 482                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 483                 t->cert=f->cert;
 484                 }
 485         else
 486                 t->cert=NULL;
 487         if (tmp != NULL) ssl_cert_free(tmp);
 488         }
 489
 490 /* Fix this so it checks all the valid key/cert options */
 491 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 492         {
 493         if (    (ctx == NULL) ||
 494                 (ctx->default_cert == NULL) ||
 495                 (ctx->default_cert->key->x509 == NULL))
 496                 {
 497                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 498                 return(0);
 499                 }
 500         if      (ctx->default_cert->key->privatekey == NULL)
 501                 {
 502                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 503                 return(0);
 504                 }
 505         return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
 506         }
 507
 508 /* Fix this function so that it takes an optional type parameter */
 509 int SSL_check_private_key(SSL *ssl)
 510         {
 511         if (ssl == NULL)
 512                 {
 513                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 514                 return(0);
 515                 }
 516         if (ssl->cert == NULL)
 517                 return(SSL_CTX_check_private_key(ssl->ctx));
 518         if (ssl->cert->key->x509 == NULL)
 519                 {
 520                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 521                 return(0);
 522                 }
 523         if (ssl->cert->key->privatekey == NULL)
 524                 {
 525                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 526                 return(0);
 527                 }
 528         return(X509_check_private_key(ssl->cert->key->x509,
 529                 ssl->cert->key->privatekey));
 530         }
 531
 532 int SSL_accept(SSL *s)
 533         {
 534         return(s->method->ssl_accept(s));
 535         }
 536
 537 int SSL_connect(SSL *s)
 538         {
 539         return(s->method->ssl_connect(s));
 540         }
 541
 542 long SSL_get_default_timeout(SSL *s)
 543         {
 544         return(s->method->get_timeout());
 545         }
 546
 547 int SSL_read(SSL *s,char *buf,int num)
 548         {
 549         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 550                 {
 551                 s->rwstate=SSL_NOTHING;
 552                 return(0);
 553                 }
 554         return(s->method->ssl_read(s,buf,num));
 555         }
 556
 557 int SSL_peek(SSL *s,char *buf,int num)
 558         {
 559         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 560                 {
 561                 return(0);
 562                 }
 563         return(s->method->ssl_peek(s,buf,num));
 564         }
 565
 566 int SSL_write(SSL *s,const char *buf,int num)
 567         {
 568         if (s->shutdown & SSL_SENT_SHUTDOWN)
 569                 {
 570                 s->rwstate=SSL_NOTHING;
 571                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 572                 return(-1);
 573                 }
 574         return(s->method->ssl_write(s,buf,num));
 575         }
 576
 577 int SSL_shutdown(SSL *s)
 578         {
 579         if ((s != NULL) && !SSL_in_init(s))
 580                 return(s->method->ssl_shutdown(s));
 581         else
 582                 return(1);
 583         }
 584
 585 int SSL_renegotiate(SSL *s)
 586         {
 587         s->new_session=1;
 588         return(s->method->ssl_renegotiate(s));
 589         }
 590
 591 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 592         {
 593         long l;
 594
 595         switch (cmd)
 596                 {
 597         case SSL_CTRL_GET_READ_AHEAD:
 598                 return(s->read_ahead);
 599         case SSL_CTRL_SET_READ_AHEAD:
 600                 l=s->read_ahead;
 601                 s->read_ahead=larg;
 602                 return(l);
 603         case SSL_CTRL_OPTIONS:
 604                 return(s->options|=larg);
 605         default:
 606                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 607                 }
 608         return(0);
 609         }
 610
 611 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 612         {
 613         long l;
 614
 615         switch (cmd)
 616                 {
 617         case SSL_CTRL_GET_READ_AHEAD:
 618                 return(ctx->read_ahead);
 619         case SSL_CTRL_SET_READ_AHEAD:
 620                 l=ctx->read_ahead;
 621                 ctx->read_ahead=larg;
 622                 return(l);
 623
 624         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 625                 l=ctx->session_cache_size;
 626                 ctx->session_cache_size=larg;
 627                 return(l);
 628         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 629                 return(ctx->session_cache_size);
 630         case SSL_CTRL_SET_SESS_CACHE_MODE:
 631                 l=ctx->session_cache_mode;
 632                 ctx->session_cache_mode=larg;
 633                 return(l);
 634         case SSL_CTRL_GET_SESS_CACHE_MODE:
 635                 return(ctx->session_cache_mode);
 636
 637         case SSL_CTRL_SESS_NUMBER:
 638                 return(ctx->sessions->num_items);
 639         case SSL_CTRL_SESS_CONNECT:
 640                 return(ctx->stats.sess_connect);
 641         case SSL_CTRL_SESS_CONNECT_GOOD:
 642                 return(ctx->stats.sess_connect_good);
 643         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 644                 return(ctx->stats.sess_connect_renegotiate);
 645         case SSL_CTRL_SESS_ACCEPT:
 646                 return(ctx->stats.sess_accept);
 647         case SSL_CTRL_SESS_ACCEPT_GOOD:
 648                 return(ctx->stats.sess_accept_good);
 649         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 650                 return(ctx->stats.sess_accept_renegotiate);
 651         case SSL_CTRL_SESS_HIT:
 652                 return(ctx->stats.sess_hit);
 653         case SSL_CTRL_SESS_CB_HIT:
 654                 return(ctx->stats.sess_cb_hit);
 655         case SSL_CTRL_SESS_MISSES:
 656                 return(ctx->stats.sess_miss);
 657         case SSL_CTRL_SESS_TIMEOUTS:
 658                 return(ctx->stats.sess_timeout);
 659         case SSL_CTRL_SESS_CACHE_FULL:
 660                 return(ctx->stats.sess_cache_full);
 661         case SSL_CTRL_OPTIONS:
 662                 return(ctx->options|=larg);
 663         default:
 664                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 665                 }
 666         return(0);
 667         }
 668
 669 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 670         {
 671         long l;
 672
 673         l=a->id-b->id;
 674         if (l == 0L)
 675                 return(0);
 676         else
 677                 return((l > 0)?1:-1);
 678         }
 679
 680 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 681         {
 682         long l;
 683
 684         l=(*ap)->id-(*bp)->id;
 685         if (l == 0L)
 686                 return(0);
 687         else
 688                 return((l > 0)?1:-1);
 689         }
 690
 691 /** return a STACK of the ciphers available for the SSL and in order of
 692  * preference */
 693 STACK *SSL_get_ciphers(SSL *s)
 694         {
 695         if ((s != NULL) && (s->cipher_list != NULL))
 696                 {
 697                 return(s->cipher_list);
 698                 }
 699         else if ((s->ctx != NULL) &&
 700                 (s->ctx->cipher_list != NULL))
 701                 {
 702                 return(s->ctx->cipher_list);
 703                 }
 704         return(NULL);
 705         }
 706
 707 /** return a STACK of the ciphers available for the SSL and in order of
 708  * algorithm id */
 709 STACK *ssl_get_ciphers_by_id(SSL *s)
 710         {
 711         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 712                 {
 713                 return(s->cipher_list_by_id);
 714                 }
 715         else if ((s != NULL) && (s->ctx != NULL) &&
 716                 (s->ctx->cipher_list_by_id != NULL))
 717                 {
 718                 return(s->ctx->cipher_list_by_id);
 719                 }
 720         return(NULL);
 721         }
 722
 723 /** The old interface to get the same thing as SSL_get_ciphers() */
 724 char *SSL_get_cipher_list(SSL *s,int n)
 725         {
 726         SSL_CIPHER *c;
 727         STACK *sk;
 728
 729         if (s == NULL) return(NULL);
 730         sk=SSL_get_ciphers(s);
 731         if ((sk == NULL) || (sk_num(sk) <= n))
 732                 return(NULL);
 733         c=(SSL_CIPHER *)sk_value(sk,n);
 734         if (c == NULL) return(NULL);
 735         return(c->name);
 736         }
 737
 738 /** specify the ciphers to be used by defaut by the SSL_CTX */
 739 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 740         {
 741         STACK *sk;
 742
 743         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 744                 &ctx->cipher_list_by_id,str);
 745 /* XXXX */
 746         return((sk == NULL)?0:1);
 747         }
 748
 749 /** specify the ciphers to be used by the SSL */
 750 int SSL_set_cipher_list(SSL *s,char *str)
 751         {
 752         STACK *sk;
 753
 754         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 755                 &s->cipher_list_by_id,str);
 756 /* XXXX */
 757         return((sk == NULL)?0:1);
 758         }
 759
 760 /* works well for SSLv2, not so good for SSLv3 */
 761 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 762         {
 763         char *p,*cp;
 764         STACK *sk;
 765         SSL_CIPHER *c;
 766         int i;
 767
 768         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 769                 (len < 2))
 770                 return(NULL);
 771
 772         p=buf;
 773         sk=s->session->ciphers;
 774         for (i=0; i<sk_num(sk); i++)
 775                 {
 776                 /* Decrement for either the ':' or a '\0' */
 777                 len--;
 778                 c=(SSL_CIPHER *)sk_value(sk,i);
 779                 for (cp=c->name; *cp; )
 780                         {
 781                         if (len-- == 0)
 782                                 {
 783                                 *p='\0';
 784                                 return(buf);
 785                                 }
 786                         else
 787                                 *(p++)= *(cp++);
 788                         }
 789                 *(p++)=':';
 790                 }
 791         p[-1]='\0';
 792         return(buf);
 793         }
 794
 795 int ssl_cipher_list_to_bytes(SSL *s,STACK *sk,unsigned char *p)
 796         {
 797         int i,j=0;
 798         SSL_CIPHER *c;
 799         unsigned char *q;
 800
 801         if (sk == NULL) return(0);
 802         q=p;
 803
 804         for (i=0; i<sk_num(sk); i++)
 805                 {
 806                 c=(SSL_CIPHER *)sk_value(sk,i);
 807                 j=ssl_put_cipher_by_char(s,c,p);
 808                 p+=j;
 809                 }
 810         return(p-q);
 811         }
 812
 813 STACK *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,STACK **skp)
 814         {
 815         SSL_CIPHER *c;
 816         STACK *sk;
 817         int i,n;
 818
 819         n=ssl_put_cipher_by_char(s,NULL,NULL);
 820         if ((num%n) != 0)
 821                 {
 822                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 823                 return(NULL);
 824                 }
 825         if ((skp == NULL) || (*skp == NULL))
 826                 sk=sk_new(NULL); /* change perhaps later */
 827         else
 828                 {
 829                 sk= *skp;
 830                 sk_zero(sk);
 831                 }
 832
 833         for (i=0; i<num; i+=n)
 834                 {
 835                 c=ssl_get_cipher_by_char(s,p);
 836                 p+=n;
 837                 if (c != NULL)
 838                         {
 839                         if (!sk_push(sk,(char *)c))
 840                                 {
 841                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 842                                 goto err;
 843                                 }
 844                         }
 845                 }
 846
 847         if (skp != NULL)
 848                 *skp=sk;
 849         return(sk);
 850 err:
 851         if ((skp == NULL) || (*skp == NULL))
 852                 sk_free(sk);
 853         return(NULL);
 854         }
 855
 856 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 857         {
 858         unsigned long l;
 859
 860         l=(unsigned long)
 861                 ((unsigned int) a->session_id[0]     )|
 862                 ((unsigned int) a->session_id[1]<< 8L)|
 863                 ((unsigned long)a->session_id[2]<<16L)|
 864                 ((unsigned long)a->session_id[3]<<24L);
 865         return(l);
 866         }
 867
 868 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 869         {
 870         if (a->ssl_version != b->ssl_version)
 871                 return(1);
 872         if (a->session_id_length != b->session_id_length)
 873                 return(1);
 874         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 875         }
 876
 877 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 878         {
 879         SSL_CTX *ret=NULL;
 880
 881         if (meth == NULL)
 882                 {
 883                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 884                 return(NULL);
 885                 }
 886
 887         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 888                 {
 889                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 890                 goto err;
 891                 }
 892         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 893         if (ret == NULL)
 894                 goto err;
 895
 896         memset(ret,0,sizeof(SSL_CTX));
 897
 898         ret->method=meth;
 899
 900         ret->cert_store=NULL;
 901         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 902         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 903         ret->session_cache_head=NULL;
 904         ret->session_cache_tail=NULL;
 905
 906         /* We take the system default */
 907         ret->session_timeout=meth->get_timeout();
 908
 909         ret->new_session_cb=NULL;
 910         ret->remove_session_cb=NULL;
 911         ret->get_session_cb=NULL;
 912
 913         memset((char *)&ret->stats,0,sizeof(ret->stats));
 914
 915         ret->references=1;
 916         ret->quiet_shutdown=0;
 917
 918 /*      ret->cipher=NULL;*/
 919 /*      ret->s2->challenge=NULL;
 920         ret->master_key=NULL;
 921         ret->key_arg=NULL;
 922         ret->s2->conn_id=NULL; */
 923
 924         ret->info_callback=NULL;
 925
 926         ret->app_verify_callback=NULL;
 927         ret->app_verify_arg=NULL;
 928
 929         ret->read_ahead=0;
 930         ret->verify_mode=SSL_VERIFY_NONE;
 931         ret->default_verify_callback=NULL;
 932         if ((ret->default_cert=ssl_cert_new()) == NULL)
 933                 goto err;
 934
 935         ret->default_passwd_callback=NULL;
 936         ret->client_cert_cb=NULL;
 937
 938         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
 939         if (ret->sessions == NULL) goto err;
 940         ret->cert_store=X509_STORE_new();
 941         if (ret->cert_store == NULL) goto err;
 942
 943         ssl_create_cipher_list(ret->method,
 944                 &ret->cipher_list,&ret->cipher_list_by_id,
 945                 SSL_DEFAULT_CIPHER_LIST);
 946         if ((ret->cipher_list == NULL) || (sk_num(ret->cipher_list) <= 0))
 947                 {
 948                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
 949                 goto err2;
 950                 }
 951
 952         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
 953                 {
 954                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
 955                 goto err2;
 956                 }
 957         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
 958                 {
 959                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
 960                 goto err2;
 961                 }
 962         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
 963                 {
 964                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
 965                 goto err2;
 966                 }
 967
 968         if ((ret->client_CA=sk_new_null()) == NULL)
 969                 goto err;
 970
 971         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
 972
 973         ret->extra_certs=NULL;
 974         ret->comp_methods=SSL_COMP_get_compression_methods();
 975
 976         return(ret);
 977 err:
 978         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
 979 err2:
 980         if (ret != NULL) SSL_CTX_free(ret);
 981         return(NULL);
 982         }
 983
 984 void SSL_CTX_free(SSL_CTX *a)
 985         {
 986         int i;
 987
 988         if (a == NULL) return;
 989
 990         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
 991 #ifdef REF_PRINT
 992         REF_PRINT("SSL_CTX",a);
 993 #endif
 994         if (i > 0) return;
 995 #ifdef REF_CHECK
 996         if (i < 0)
 997                 {
 998                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
 999                 abort(); /* ok */
1000                 }
1001 #endif
1002         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1003
1004         if (a->sessions != NULL)
1005                 {
1006                 SSL_CTX_flush_sessions(a,0);
1007                 lh_free(a->sessions);
1008                 }
1009         if (a->cert_store != NULL)
1010                 X509_STORE_free(a->cert_store);
1011         if (a->cipher_list != NULL)
1012                 sk_free(a->cipher_list);
1013         if (a->cipher_list_by_id != NULL)
1014                 sk_free(a->cipher_list_by_id);
1015         if (a->default_cert != NULL)
1016                 ssl_cert_free(a->default_cert);
1017         if (a->client_CA != NULL)
1018                 sk_pop_free(a->client_CA,X509_NAME_free);
1019         if (a->extra_certs != NULL)
1020                 sk_pop_free(a->extra_certs,X509_free);
1021         if (a->comp_methods != NULL)
1022                 sk_pop_free(a->comp_methods,free);
1023         Free((char *)a);
1024         }
1025
1026 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1027         {
1028         ctx->default_passwd_callback=cb;
1029         }
1030
1031 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1032         {
1033         ctx->app_verify_callback=cb;
1034         ctx->app_verify_arg=arg;
1035         }
1036
1037 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1038         {
1039         ctx->verify_mode=mode;
1040         ctx->default_verify_callback=cb;
1041         /* This needs cleaning up EAY EAY EAY */
1042         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1043         }
1044
1045 void ssl_set_cert_masks(CERT *c,SSL_CIPHER *cipher)
1046         {
1047         CERT_PKEY *cpk;
1048         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1049         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1050         int rsa_tmp_export,dh_tmp_export,kl;
1051         unsigned long mask,emask;
1052
1053         if ((c == NULL) || (c->valid)) return;
1054
1055         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1056
1057 #ifndef NO_RSA
1058         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1059         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1060                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1061 #else
1062         rsa_tmp=rsa_tmp_export=0;
1063 #endif
1064 #ifndef NO_DH
1065         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1066         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1067                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1068 #else
1069         dh_tmp=dh_tmp_export=0;
1070 #endif
1071
1072         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1073         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1074         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1075         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1076         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1077         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1078         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1079         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1080         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1081         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1082         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1083 /* FIX THIS EAY EAY EAY */
1084         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1085         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1086
1087         mask=0;
1088         emask=0;
1089
1090 #ifdef CIPHER_DEBUG
1091         printf("rt=%d dht=%d re=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1092                 rsa_tmp,dh_tmp,
1093                 rsa_enc,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1094 #endif
1095
1096         if (rsa_enc || (rsa_tmp && rsa_sign))
1097                 mask|=SSL_kRSA;
1098         if (rsa_enc_export || (rsa_tmp_export && rsa_sign))
1099                 emask|=SSL_kRSA;
1100
1101 #if 0
1102         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1103         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1104                 (rsa_enc || rsa_sign || dsa_sign))
1105                 mask|=SSL_kEDH;
1106         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1107                 (rsa_enc || rsa_sign || dsa_sign))
1108                 emask|=SSL_kEDH;
1109 #endif
1110
1111         if (dh_tmp_export)
1112                 emask|=SSL_kEDH;
1113
1114         if (dh_tmp)
1115                 mask|=SSL_kEDH;
1116
1117         if (dh_rsa) mask|=SSL_kDHr;
1118         if (dh_rsa_export) emask|=SSL_kDHr;
1119
1120         if (dh_dsa) mask|=SSL_kDHd;
1121         if (dh_dsa_export) emask|=SSL_kDHd;
1122
1123         if (rsa_enc || rsa_sign)
1124                 {
1125                 mask|=SSL_aRSA;
1126                 emask|=SSL_aRSA;
1127                 }
1128
1129         if (dsa_sign)
1130                 {
1131                 mask|=SSL_aDSS;
1132                 emask|=SSL_aDSS;
1133                 }
1134
1135 #ifdef SSL_ALLOW_ADH
1136         mask|=SSL_aNULL;
1137         emask|=SSL_aNULL;
1138 #endif
1139
1140         c->mask=mask;
1141         c->export_mask=emask;
1142         c->valid=1;
1143         }
1144
1145 /* THIS NEEDS CLEANING UP */
1146 X509 *ssl_get_server_send_cert(SSL *s)
1147         {
1148         unsigned long alg,mask,kalg;
1149         CERT *c;
1150         int i,export;
1151
1152         c=s->cert;
1153         ssl_set_cert_masks(c,s->s3->tmp.new_cipher);
1154         alg=s->s3->tmp.new_cipher->algorithms;
1155         export=SSL_IS_EXPORT(alg);
1156         mask=export?c->export_mask:c->mask;
1157         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1158
1159         if      (kalg & SSL_kDHr)
1160                 i=SSL_PKEY_DH_RSA;
1161         else if (kalg & SSL_kDHd)
1162                 i=SSL_PKEY_DH_DSA;
1163         else if (kalg & SSL_aDSS)
1164                 i=SSL_PKEY_DSA_SIGN;
1165         else if (kalg & SSL_aRSA)
1166                 {
1167                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1168                         i=SSL_PKEY_RSA_SIGN;
1169                 else
1170                         i=SSL_PKEY_RSA_ENC;
1171                 }
1172         else /* if (kalg & SSL_aNULL) */
1173                 {
1174                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1175                 return(NULL);
1176                 }
1177         if (c->pkeys[i].x509 == NULL) return(NULL);
1178         return(c->pkeys[i].x509);
1179         }
1180
1181 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1182         {
1183         unsigned long alg;
1184         CERT *c;
1185
1186         alg=cipher->algorithms;
1187         c=s->cert;
1188
1189         if ((alg & SSL_aDSS) &&
1190                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1191                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1192         else if (alg & SSL_aRSA)
1193                 {
1194                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1195                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1196                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1197                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1198                 else
1199                         return(NULL);
1200                 }
1201         else /* if (alg & SSL_aNULL) */
1202                 {
1203                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1204                 return(NULL);
1205                 }
1206         }
1207
1208 void ssl_update_cache(SSL *s,int mode)
1209         {
1210         int i;
1211
1212         /* If the session_id_length is 0, we are not supposed to cache it,
1213          * and it would be rather hard to do anyway :-) */
1214         if (s->session->session_id_length == 0) return;
1215
1216         if ((s->ctx->session_cache_mode & mode)
1217                 && (!s->hit)
1218                 && SSL_CTX_add_session(s->ctx,s->session)
1219                 && (s->ctx->new_session_cb != NULL))
1220                 {
1221                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1222                 if (!s->ctx->new_session_cb(s,s->session))
1223                         SSL_SESSION_free(s->session);
1224                 }
1225
1226         /* auto flush every 255 connections */
1227         i=s->ctx->session_cache_mode;
1228         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1229                 ((i & mode) == mode))
1230                 {
1231                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1232                         ?s->ctx->stats.sess_connect_good
1233                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1234                         {
1235                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1236                         }
1237                 }
1238         }
1239
1240 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1241         {
1242         return(s->method);
1243         }
1244
1245 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1246         {
1247         int conn= -1;
1248         int ret=1;
1249
1250         if (s->method != meth)
1251                 {
1252                 if (s->handshake_func != NULL)
1253                         conn=(s->handshake_func == s->method->ssl_connect);
1254
1255                 if (s->method->version == meth->version)
1256                         s->method=meth;
1257                 else
1258                         {
1259                         s->method->ssl_free(s);
1260                         s->method=meth;
1261                         ret=s->method->ssl_new(s);
1262                         }
1263
1264                 if (conn == 1)
1265                         s->handshake_func=meth->ssl_connect;
1266                 else if (conn == 0)
1267                         s->handshake_func=meth->ssl_accept;
1268                 }
1269         return(ret);
1270         }
1271
1272 int SSL_get_error(SSL *s,int i)
1273         {
1274         int reason;
1275         unsigned long l;
1276         BIO *bio;
1277
1278         if (i > 0) return(SSL_ERROR_NONE);
1279
1280         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1281          * etc, where we do encode the error */
1282         if ((l=ERR_peek_error()) != 0)
1283                 {
1284                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1285                         return(SSL_ERROR_SYSCALL);
1286                 else
1287                         return(SSL_ERROR_SSL);
1288                 }
1289
1290         if ((i < 0) && SSL_want_read(s))
1291                 {
1292                 bio=SSL_get_rbio(s);
1293                 if (BIO_should_read(bio))
1294                         return(SSL_ERROR_WANT_READ);
1295                 else if (BIO_should_write(bio))
1296                         return(SSL_ERROR_WANT_WRITE);
1297                 else if (BIO_should_io_special(bio))
1298                         {
1299                         reason=BIO_get_retry_reason(bio);
1300                         if (reason == BIO_RR_CONNECT)
1301                                 return(SSL_ERROR_WANT_CONNECT);
1302                         else
1303                                 return(SSL_ERROR_SYSCALL); /* unknown */
1304                         }
1305                 }
1306
1307         if ((i < 0) && SSL_want_write(s))
1308                 {
1309                 bio=SSL_get_wbio(s);
1310                 if (BIO_should_write(bio))
1311                         return(SSL_ERROR_WANT_WRITE);
1312                 else if (BIO_should_read(bio))
1313                         return(SSL_ERROR_WANT_READ);
1314                 else if (BIO_should_io_special(bio))
1315                         {
1316                         reason=BIO_get_retry_reason(bio);
1317                         if (reason == BIO_RR_CONNECT)
1318                                 return(SSL_ERROR_WANT_CONNECT);
1319                         else
1320                                 return(SSL_ERROR_SYSCALL);
1321                         }
1322                 }
1323         if ((i < 0) && SSL_want_x509_lookup(s))
1324                 {
1325                 return(SSL_ERROR_WANT_X509_LOOKUP);
1326                 }
1327
1328         if (i == 0)
1329                 {
1330                 if (s->version == SSL2_VERSION)
1331                         {
1332                         /* assume it is the socket being closed */
1333                         return(SSL_ERROR_ZERO_RETURN);
1334                         }
1335                 else
1336                         {
1337                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1338                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1339                                 return(SSL_ERROR_ZERO_RETURN);
1340                         }
1341                 }
1342         return(SSL_ERROR_SYSCALL);
1343         }
1344
1345 int SSL_do_handshake(SSL *s)
1346         {
1347         int ret=1;
1348
1349         if (s->handshake_func == NULL)
1350                 {
1351                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1352                 return(-1);
1353                 }
1354
1355         s->method->ssl_renegotiate_check(s);
1356
1357         if (SSL_in_init(s) || SSL_in_before(s))
1358                 {
1359                 ret=s->handshake_func(s);
1360                 }
1361         return(ret);
1362         }
1363
1364 /* For the next 2 functions, SSL_clear() sets shutdown and so
1365  * one of these calls will reset it */
1366 void SSL_set_accept_state(SSL *s)
1367         {
1368         s->server=1;
1369         s->shutdown=0;
1370         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1371         s->handshake_func=s->method->ssl_accept;
1372         /* clear the current cipher */
1373         ssl_clear_cipher_ctx(s);
1374         }
1375
1376 void SSL_set_connect_state(SSL *s)
1377         {
1378         s->server=0;
1379         s->shutdown=0;
1380         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1381         s->handshake_func=s->method->ssl_connect;
1382         /* clear the current cipher */
1383         ssl_clear_cipher_ctx(s);
1384         }
1385
1386 int ssl_undefined_function(SSL *s)
1387         {
1388         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1389         return(0);
1390         }
1391
1392 SSL_METHOD *ssl_bad_method(int ver)
1393         {
1394         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1395         return(NULL);
1396         }
1397
1398 char *SSL_get_version(SSL *s)
1399         {
1400         if (s->version == TLS1_VERSION)
1401                 return("TLSv1");
1402         else if (s->version == SSL3_VERSION)
1403                 return("SSLv3");
1404         else if (s->version == SSL2_VERSION)
1405                 return("SSLv2");
1406         else
1407                 return("unknown");
1408         }
1409
1410 SSL *SSL_dup(SSL *s)
1411         {
1412         STACK *sk;
1413         X509_NAME *xn;
1414         SSL *ret;
1415         int i;
1416
1417         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL) return(NULL);
1418
1419         /* This copies version, session-id, SSL_METHOD and 'cert' */
1420         SSL_copy_session_id(ret,s);
1421
1422         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1423         SSL_set_verify(ret,SSL_get_verify_mode(s),
1424                 SSL_get_verify_callback(s));
1425
1426         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1427
1428         ret->debug=s->debug;
1429         ret->options=s->options;
1430
1431         /* copy app data, a little dangerous perhaps */
1432         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1433                 goto err;
1434
1435         /* setup rbio, and wbio */
1436         if (s->rbio != NULL)
1437                 {
1438                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1439                         goto err;
1440                 }
1441         if (s->wbio != NULL)
1442                 {
1443                 if (s->wbio != s->rbio)
1444                         {
1445                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1446                                 goto err;
1447                         }
1448                 else
1449                         ret->wbio=ret->rbio;
1450                 }
1451
1452         /* dup the cipher_list and cipher_list_by_id stacks */
1453         if (s->cipher_list != NULL)
1454                 {
1455                 if ((ret->cipher_list=sk_dup(s->cipher_list)) == NULL)
1456                         goto err;
1457                 }
1458         if (s->cipher_list_by_id != NULL)
1459                 if ((ret->cipher_list_by_id=sk_dup(s->cipher_list_by_id))
1460                         == NULL)
1461                         goto err;
1462
1463         /* Dup the client_CA list */
1464         if (s->client_CA != NULL)
1465                 {
1466                 if ((sk=sk_dup(s->client_CA)) == NULL) goto err;
1467                 ret->client_CA=sk;
1468                 for (i=0; i<sk_num(sk); i++)
1469                         {
1470                         xn=(X509_NAME *)sk_value(sk,i);
1471                         if ((sk_value(sk,i)=(char *)X509_NAME_dup(xn)) == NULL)
1472                                 {
1473                                 X509_NAME_free(xn);
1474                                 goto err;
1475                                 }
1476                         }
1477                 }
1478
1479         ret->shutdown=s->shutdown;
1480         ret->state=s->state;
1481         ret->handshake_func=s->handshake_func;
1482         ret->server=s->server;
1483
1484         if (0)
1485                 {
1486 err:
1487                 if (ret != NULL) SSL_free(ret);
1488                 ret=NULL;
1489                 }
1490         return(ret);
1491         }
1492
1493 void ssl_clear_cipher_ctx(SSL *s)
1494         {
1495         if (s->enc_read_ctx != NULL)
1496                 {
1497                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1498                 Free(s->enc_read_ctx);
1499                 s->enc_read_ctx=NULL;
1500                 }
1501         if (s->enc_write_ctx != NULL)
1502                 {
1503                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1504                 Free(s->enc_write_ctx);
1505                 s->enc_write_ctx=NULL;
1506                 }
1507         if (s->expand != NULL)
1508                 {
1509                 COMP_CTX_free(s->expand);
1510                 s->expand=NULL;
1511                 }
1512         if (s->compress != NULL)
1513                 {
1514                 COMP_CTX_free(s->compress);
1515                 s->compress=NULL;
1516                 }
1517         }
1518
1519 /* Fix this function so that it takes an optional type parameter */
1520 X509 *SSL_get_certificate(SSL *s)
1521         {
1522         if (s->cert != NULL)
1523                 return(s->cert->key->x509);
1524         else
1525                 return(NULL);
1526         }
1527
1528 /* Fix this function so that it takes an optional type parameter */
1529 EVP_PKEY *SSL_get_privatekey(SSL *s)
1530         {
1531         if (s->cert != NULL)
1532                 return(s->cert->key->privatekey);
1533         else
1534                 return(NULL);
1535         }
1536
1537 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1538         {
1539         if ((s->session != NULL) && (s->session->cipher != NULL))
1540                 return(s->session->cipher);
1541         return(NULL);
1542         }
1543
1544 int ssl_init_wbio_buffer(SSL *s,int push)
1545         {
1546         BIO *bbio;
1547
1548         if (s->bbio == NULL)
1549                 {
1550                 bbio=BIO_new(BIO_f_buffer());
1551                 if (bbio == NULL) return(0);
1552                 s->bbio=bbio;
1553                 }
1554         else
1555                 {
1556                 bbio=s->bbio;
1557                 if (s->bbio == s->wbio)
1558                         s->wbio=BIO_pop(s->wbio);
1559                 }
1560         BIO_reset(bbio);
1561 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1562         if (!BIO_set_read_buffer_size(bbio,1))
1563                 {
1564                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1565                 return(0);
1566                 }
1567         if (push)
1568                 {
1569                 if (s->wbio != bbio)
1570                         s->wbio=BIO_push(bbio,s->wbio);
1571                 }
1572         else
1573                 {
1574                 if (s->wbio == bbio)
1575                         s->wbio=BIO_pop(bbio);
1576                 }
1577         return(1);
1578         }
1579
1580 void ssl_free_wbio_buffer(SSL *s)
1581         {
1582         BIO *under;
1583
1584         if (s->bbio == NULL) return;
1585
1586         if (s->bbio == s->wbio)
1587                 {
1588                 /* remove buffering */
1589                 under=BIO_pop(s->wbio);
1590                 if (under != NULL)
1591                         s->wbio=under;
1592                 else
1593                         abort(); /* ok */
1594                 }
1595         BIO_free(s->bbio);
1596         s->bbio=NULL;
1597         }
1598
1599 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1600         {
1601         ctx->quiet_shutdown=mode;
1602         }
1603
1604 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1605         {
1606         return(ctx->quiet_shutdown);
1607         }
1608
1609 void SSL_set_quiet_shutdown(SSL *s,int mode)
1610         {
1611         s->quiet_shutdown=mode;
1612         }
1613
1614 int SSL_get_quiet_shutdown(SSL *s)
1615         {
1616         return(s->quiet_shutdown);
1617         }
1618
1619 void SSL_set_shutdown(SSL *s,int mode)
1620         {
1621         s->shutdown=mode;
1622         }
1623
1624 int SSL_get_shutdown(SSL *s)
1625         {
1626         return(s->shutdown);
1627         }
1628
1629 int SSL_version(SSL *s)
1630         {
1631         return(s->version);
1632         }
1633
1634 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1635         {
1636         return(ssl->ctx);
1637         }
1638
1639 #ifndef NO_STDIO
1640 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1641         {
1642         return(X509_STORE_set_default_paths(ctx->cert_store));
1643         }
1644
1645 int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
1646         {
1647         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1648         }
1649 #endif
1650
1651 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1652         {
1653         ssl->info_callback=cb;
1654         }
1655
1656 void (*SSL_get_info_callback(SSL *ssl))()
1657         {
1658         return((void (*)())ssl->info_callback);
1659         }
1660
1661 int SSL_state(SSL *ssl)
1662         {
1663         return(ssl->state);
1664         }
1665
1666 void SSL_set_verify_result(SSL *ssl,long arg)
1667         {
1668         ssl->verify_result=arg;
1669         }
1670
1671 long SSL_get_verify_result(SSL *ssl)
1672         {
1673         return(ssl->verify_result);
1674         }
1675
1676 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1677                          int (*dup_func)(),void (*free_func)())
1678         {
1679         ssl_meth_num++;
1680         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1681                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1682         }
1683
1684 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1685         {
1686         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1687         }
1688
1689 void *SSL_get_ex_data(SSL *s,int idx)
1690         {
1691         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1692         }
1693
1694 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1695                              int (*dup_func)(),void (*free_func)())
1696         {
1697         ssl_ctx_meth_num++;
1698         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1699                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1700         }
1701
1702 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1703         {
1704         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1705         }
1706
1707 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1708         {
1709         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1710         }
1711
1712 int ssl_ok(SSL *s)
1713         {
1714         return(1);
1715         }
1716
1717 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1718         {
1719         return(ctx->cert_store);
1720         }
1721
1722 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1723         {
1724         if (ctx->cert_store != NULL)
1725                 X509_STORE_free(ctx->cert_store);
1726         ctx->cert_store=store;
1727         }
1728
1729 int SSL_want(SSL *s)
1730         {
1731         return(s->rwstate);
1732         }
1733
1734 /*!
1735  * \brief Set the callback for generating temporary RSA keys.
1736  * \param ctx the SSL context.
1737  * \param cb the callback
1738  */
1739
1740 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1741                                                           int keylength))
1742     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1743
1744 #ifdef DOXYGEN
1745 /*!
1746  * \brief The RSA temporary key callback function.
1747  * \param ssl the SSL session.
1748  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1749  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1750  * the required key in bits.
1751  * \return the temporary RSA key.
1752  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1753  */
1754
1755 RSA *cb(SSL *ssl,int export,int keylength)
1756     {}
1757 #endif
1758
1759 /*!
1760  * \brief Set the callback for generating temporary DH keys.
1761  * \param ctx the SSL context.
1762  * \param dh the callback
1763  */
1764
1765 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1766                                                         int keylength))
1767     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1768
1769 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1770                                                           int keylength))
1771     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1772
1773 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1774                                                         int keylength))
1775     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1776
1777 #if defined(_WINDLL) && defined(WIN16)
1778 #include "../crypto/bio/bss_file.c"
1779 #endif