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))()
 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))()
 406         {
 407         return(ctx->default_verify_callback);
 408         }
 409
 410 void SSL_set_verify(SSL *s,int mode,int (*callback)())
 411         {
 412         s->verify_mode=mode;
 413         if (callback != NULL)
 414                 s->verify_callback=callback;
 415         }
 416
 417 void SSL_set_read_ahead(SSL *s,int yes)
 418         {
 419         s->read_ahead=yes;
 420         }
 421
 422 int SSL_get_read_ahead(SSL *s)
 423         {
 424         return(s->read_ahead);
 425         }
 426
 427 int SSL_pending(SSL *s)
 428         {
 429         return(s->method->ssl_pending(s));
 430         }
 431
 432 X509 *SSL_get_peer_certificate(SSL *s)
 433         {
 434         X509 *r;
 435
 436         if ((s == NULL) || (s->session == NULL))
 437                 r=NULL;
 438         else
 439                 r=s->session->peer;
 440
 441         if (r == NULL) return(r);
 442
 443         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 444
 445         return(r);
 446         }
 447
 448 STACK *SSL_get_peer_cert_chain(SSL *s)
 449         {
 450         STACK *r;
 451
 452         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
 453                 r=NULL;
 454         else
 455                 r=s->session->cert->cert_chain;
 456
 457         return(r);
 458         }
 459
 460 /* Now in theory, since the calling process own 't' it should be safe to
 461  * modify.  We need to be able to read f without being hassled */
 462 void SSL_copy_session_id(SSL *t,SSL *f)
 463         {
 464         CERT *tmp;
 465
 466         /* Do we need to to SSL locking? */
 467         SSL_set_session(t,SSL_get_session(f));
 468
 469         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 470          * vice-versa */
 471         if (t->method != f->method)
 472                 {
 473                 t->method->ssl_free(t); /* cleanup current */
 474                 t->method=f->method;    /* change method */
 475                 t->method->ssl_new(t);  /* setup new */
 476                 }
 477
 478         tmp=t->cert;
 479         if (f->cert != NULL)
 480                 {
 481                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 482                 t->cert=f->cert;
 483                 }
 484         else
 485                 t->cert=NULL;
 486         if (tmp != NULL) ssl_cert_free(tmp);
 487         }
 488
 489 /* Fix this so it checks all the valid key/cert options */
 490 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 491         {
 492         if (    (ctx == NULL) ||
 493                 (ctx->default_cert == NULL) ||
 494                 (ctx->default_cert->key->x509 == NULL))
 495                 {
 496                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 497                 return(0);
 498                 }
 499         if      (ctx->default_cert->key->privatekey == NULL)
 500                 {
 501                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 502                 return(0);
 503                 }
 504         return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
 505         }
 506
 507 /* Fix this function so that it takes an optional type parameter */
 508 int SSL_check_private_key(SSL *ssl)
 509         {
 510         if (ssl == NULL)
 511                 {
 512                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 513                 return(0);
 514                 }
 515         if (ssl->cert == NULL)
 516                 return(SSL_CTX_check_private_key(ssl->ctx));
 517         if (ssl->cert->key->x509 == NULL)
 518                 {
 519                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 520                 return(0);
 521                 }
 522         if (ssl->cert->key->privatekey == NULL)
 523                 {
 524                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 525                 return(0);
 526                 }
 527         return(X509_check_private_key(ssl->cert->key->x509,
 528                 ssl->cert->key->privatekey));
 529         }
 530
 531 int SSL_accept(SSL *s)
 532         {
 533         return(s->method->ssl_accept(s));
 534         }
 535
 536 int SSL_connect(SSL *s)
 537         {
 538         return(s->method->ssl_connect(s));
 539         }
 540
 541 long SSL_get_default_timeout(SSL *s)
 542         {
 543         return(s->method->get_timeout());
 544         }
 545
 546 int SSL_read(SSL *s,char *buf,int num)
 547         {
 548         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 549                 {
 550                 s->rwstate=SSL_NOTHING;
 551                 return(0);
 552                 }
 553         return(s->method->ssl_read(s,buf,num));
 554         }
 555
 556 int SSL_peek(SSL *s,char *buf,int num)
 557         {
 558         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 559                 {
 560                 return(0);
 561                 }
 562         return(s->method->ssl_peek(s,buf,num));
 563         }
 564
 565 int SSL_write(SSL *s,const char *buf,int num)
 566         {
 567         if (s->shutdown & SSL_SENT_SHUTDOWN)
 568                 {
 569                 s->rwstate=SSL_NOTHING;
 570                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 571                 return(-1);
 572                 }
 573         return(s->method->ssl_write(s,buf,num));
 574         }
 575
 576 int SSL_shutdown(SSL *s)
 577         {
 578         if ((s != NULL) && !SSL_in_init(s))
 579                 return(s->method->ssl_shutdown(s));
 580         else
 581                 return(1);
 582         }
 583
 584 int SSL_renegotiate(SSL *s)
 585         {
 586         s->new_session=1;
 587         return(s->method->ssl_renegotiate(s));
 588         }
 589
 590 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 591         {
 592         long l;
 593
 594         switch (cmd)
 595                 {
 596         case SSL_CTRL_GET_READ_AHEAD:
 597                 return(s->read_ahead);
 598         case SSL_CTRL_SET_READ_AHEAD:
 599                 l=s->read_ahead;
 600                 s->read_ahead=larg;
 601                 return(l);
 602         case SSL_CTRL_OPTIONS:
 603                 return(s->options|=larg);
 604         default:
 605                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 606                 }
 607         return(0);
 608         }
 609
 610 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 611         {
 612         long l;
 613
 614         switch (cmd)
 615                 {
 616         case SSL_CTRL_GET_READ_AHEAD:
 617                 return(ctx->read_ahead);
 618         case SSL_CTRL_SET_READ_AHEAD:
 619                 l=ctx->read_ahead;
 620                 ctx->read_ahead=larg;
 621                 return(l);
 622
 623         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 624                 l=ctx->session_cache_size;
 625                 ctx->session_cache_size=larg;
 626                 return(l);
 627         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 628                 return(ctx->session_cache_size);
 629         case SSL_CTRL_SET_SESS_CACHE_MODE:
 630                 l=ctx->session_cache_mode;
 631                 ctx->session_cache_mode=larg;
 632                 return(l);
 633         case SSL_CTRL_GET_SESS_CACHE_MODE:
 634                 return(ctx->session_cache_mode);
 635
 636         case SSL_CTRL_SESS_NUMBER:
 637                 return(ctx->sessions->num_items);
 638         case SSL_CTRL_SESS_CONNECT:
 639                 return(ctx->stats.sess_connect);
 640         case SSL_CTRL_SESS_CONNECT_GOOD:
 641                 return(ctx->stats.sess_connect_good);
 642         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 643                 return(ctx->stats.sess_connect_renegotiate);
 644         case SSL_CTRL_SESS_ACCEPT:
 645                 return(ctx->stats.sess_accept);
 646         case SSL_CTRL_SESS_ACCEPT_GOOD:
 647                 return(ctx->stats.sess_accept_good);
 648         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 649                 return(ctx->stats.sess_accept_renegotiate);
 650         case SSL_CTRL_SESS_HIT:
 651                 return(ctx->stats.sess_hit);
 652         case SSL_CTRL_SESS_CB_HIT:
 653                 return(ctx->stats.sess_cb_hit);
 654         case SSL_CTRL_SESS_MISSES:
 655                 return(ctx->stats.sess_miss);
 656         case SSL_CTRL_SESS_TIMEOUTS:
 657                 return(ctx->stats.sess_timeout);
 658         case SSL_CTRL_SESS_CACHE_FULL:
 659                 return(ctx->stats.sess_cache_full);
 660         case SSL_CTRL_OPTIONS:
 661                 return(ctx->options|=larg);
 662         default:
 663                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 664                 }
 665         return(0);
 666         }
 667
 668 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 669         {
 670         long l;
 671
 672         l=a->id-b->id;
 673         if (l == 0L)
 674                 return(0);
 675         else
 676                 return((l > 0)?1:-1);
 677         }
 678
 679 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 680         {
 681         long l;
 682
 683         l=(*ap)->id-(*bp)->id;
 684         if (l == 0L)
 685                 return(0);
 686         else
 687                 return((l > 0)?1:-1);
 688         }
 689
 690 /** return a STACK of the ciphers available for the SSL and in order of
 691  * preference */
 692 STACK *SSL_get_ciphers(SSL *s)
 693         {
 694         if ((s != NULL) && (s->cipher_list != NULL))
 695                 {
 696                 return(s->cipher_list);
 697                 }
 698         else if ((s->ctx != NULL) &&
 699                 (s->ctx->cipher_list != NULL))
 700                 {
 701                 return(s->ctx->cipher_list);
 702                 }
 703         return(NULL);
 704         }
 705
 706 /** return a STACK of the ciphers available for the SSL and in order of
 707  * algorithm id */
 708 STACK *ssl_get_ciphers_by_id(SSL *s)
 709         {
 710         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 711                 {
 712                 return(s->cipher_list_by_id);
 713                 }
 714         else if ((s != NULL) && (s->ctx != NULL) &&
 715                 (s->ctx->cipher_list_by_id != NULL))
 716                 {
 717                 return(s->ctx->cipher_list_by_id);
 718                 }
 719         return(NULL);
 720         }
 721
 722 /** The old interface to get the same thing as SSL_get_ciphers() */
 723 char *SSL_get_cipher_list(SSL *s,int n)
 724         {
 725         SSL_CIPHER *c;
 726         STACK *sk;
 727
 728         if (s == NULL) return(NULL);
 729         sk=SSL_get_ciphers(s);
 730         if ((sk == NULL) || (sk_num(sk) <= n))
 731                 return(NULL);
 732         c=(SSL_CIPHER *)sk_value(sk,n);
 733         if (c == NULL) return(NULL);
 734         return(c->name);
 735         }
 736
 737 /** specify the ciphers to be used by defaut by the SSL_CTX */
 738 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 739         {
 740         STACK *sk;
 741
 742         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 743                 &ctx->cipher_list_by_id,str);
 744 /* XXXX */
 745         return((sk == NULL)?0:1);
 746         }
 747
 748 /** specify the ciphers to be used by the SSL */
 749 int SSL_set_cipher_list(SSL *s,char *str)
 750         {
 751         STACK *sk;
 752
 753         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 754                 &s->cipher_list_by_id,str);
 755 /* XXXX */
 756         return((sk == NULL)?0:1);
 757         }
 758
 759 /* works well for SSLv2, not so good for SSLv3 */
 760 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 761         {
 762         char *p,*cp;
 763         STACK *sk;
 764         SSL_CIPHER *c;
 765         int i;
 766
 767         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 768                 (len < 2))
 769                 return(NULL);
 770
 771         p=buf;
 772         sk=s->session->ciphers;
 773         for (i=0; i<sk_num(sk); i++)
 774                 {
 775                 /* Decrement for either the ':' or a '\0' */
 776                 len--;
 777                 c=(SSL_CIPHER *)sk_value(sk,i);
 778                 for (cp=c->name; *cp; )
 779                         {
 780                         if (len-- == 0)
 781                                 {
 782                                 *p='\0';
 783                                 return(buf);
 784                                 }
 785                         else
 786                                 *(p++)= *(cp++);
 787                         }
 788                 *(p++)=':';
 789                 }
 790         p[-1]='\0';
 791         return(buf);
 792         }
 793
 794 int ssl_cipher_list_to_bytes(SSL *s,STACK *sk,unsigned char *p)
 795         {
 796         int i,j=0;
 797         SSL_CIPHER *c;
 798         unsigned char *q;
 799
 800         if (sk == NULL) return(0);
 801         q=p;
 802
 803         for (i=0; i<sk_num(sk); i++)
 804                 {
 805                 c=(SSL_CIPHER *)sk_value(sk,i);
 806                 j=ssl_put_cipher_by_char(s,c,p);
 807                 p+=j;
 808                 }
 809         return(p-q);
 810         }
 811
 812 STACK *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,STACK **skp)
 813         {
 814         SSL_CIPHER *c;
 815         STACK *sk;
 816         int i,n;
 817
 818         n=ssl_put_cipher_by_char(s,NULL,NULL);
 819         if ((num%n) != 0)
 820                 {
 821                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 822                 return(NULL);
 823                 }
 824         if ((skp == NULL) || (*skp == NULL))
 825                 sk=sk_new(NULL); /* change perhaps later */
 826         else
 827                 {
 828                 sk= *skp;
 829                 sk_zero(sk);
 830                 }
 831
 832         for (i=0; i<num; i+=n)
 833                 {
 834                 c=ssl_get_cipher_by_char(s,p);
 835                 p+=n;
 836                 if (c != NULL)
 837                         {
 838                         if (!sk_push(sk,(char *)c))
 839                                 {
 840                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 841                                 goto err;
 842                                 }
 843                         }
 844                 }
 845
 846         if (skp != NULL)
 847                 *skp=sk;
 848         return(sk);
 849 err:
 850         if ((skp == NULL) || (*skp == NULL))
 851                 sk_free(sk);
 852         return(NULL);
 853         }
 854
 855 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 856         {
 857         unsigned long l;
 858
 859         l=(unsigned long)
 860                 ((unsigned int) a->session_id[0]     )|
 861                 ((unsigned int) a->session_id[1]<< 8L)|
 862                 ((unsigned long)a->session_id[2]<<16L)|
 863                 ((unsigned long)a->session_id[3]<<24L);
 864         return(l);
 865         }
 866
 867 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 868         {
 869         if (a->ssl_version != b->ssl_version)
 870                 return(1);
 871         if (a->session_id_length != b->session_id_length)
 872                 return(1);
 873         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 874         }
 875
 876 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 877         {
 878         SSL_CTX *ret=NULL;
 879
 880         if (meth == NULL)
 881                 {
 882                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 883                 return(NULL);
 884                 }
 885
 886         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 887                 {
 888                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 889                 goto err;
 890                 }
 891         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 892         if (ret == NULL)
 893                 goto err;
 894
 895         memset(ret,0,sizeof(SSL_CTX));
 896
 897         ret->method=meth;
 898
 899         ret->cert_store=NULL;
 900         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 901         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 902         ret->session_cache_head=NULL;
 903         ret->session_cache_tail=NULL;
 904
 905         /* We take the system default */
 906         ret->session_timeout=meth->get_timeout();
 907
 908         ret->new_session_cb=NULL;
 909         ret->remove_session_cb=NULL;
 910         ret->get_session_cb=NULL;
 911
 912         memset((char *)&ret->stats,0,sizeof(ret->stats));
 913
 914         ret->references=1;
 915         ret->quiet_shutdown=0;
 916
 917 /*      ret->cipher=NULL;*/
 918 /*      ret->s2->challenge=NULL;
 919         ret->master_key=NULL;
 920         ret->key_arg=NULL;
 921         ret->s2->conn_id=NULL; */
 922
 923         ret->info_callback=NULL;
 924
 925         ret->app_verify_callback=NULL;
 926         ret->app_verify_arg=NULL;
 927
 928         ret->read_ahead=0;
 929         ret->verify_mode=SSL_VERIFY_NONE;
 930         ret->default_verify_callback=NULL;
 931         if ((ret->default_cert=ssl_cert_new()) == NULL)
 932                 goto err;
 933
 934         ret->default_passwd_callback=NULL;
 935         ret->client_cert_cb=NULL;
 936
 937         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
 938         if (ret->sessions == NULL) goto err;
 939         ret->cert_store=X509_STORE_new();
 940         if (ret->cert_store == NULL) goto err;
 941
 942         ssl_create_cipher_list(ret->method,
 943                 &ret->cipher_list,&ret->cipher_list_by_id,
 944                 SSL_DEFAULT_CIPHER_LIST);
 945         if ((ret->cipher_list == NULL) || (sk_num(ret->cipher_list) <= 0))
 946                 {
 947                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
 948                 goto err2;
 949                 }
 950
 951         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
 952                 {
 953                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
 954                 goto err2;
 955                 }
 956         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
 957                 {
 958                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
 959                 goto err2;
 960                 }
 961         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
 962                 {
 963                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
 964                 goto err2;
 965                 }
 966
 967         if ((ret->client_CA=sk_new_null()) == NULL)
 968                 goto err;
 969
 970         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
 971
 972         ret->extra_certs=NULL;
 973         ret->comp_methods=SSL_COMP_get_compression_methods();
 974
 975         return(ret);
 976 err:
 977         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
 978 err2:
 979         if (ret != NULL) SSL_CTX_free(ret);
 980         return(NULL);
 981         }
 982
 983 void SSL_CTX_free(SSL_CTX *a)
 984         {
 985         int i;
 986
 987         if (a == NULL) return;
 988
 989         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
 990 #ifdef REF_PRINT
 991         REF_PRINT("SSL_CTX",a);
 992 #endif
 993         if (i > 0) return;
 994 #ifdef REF_CHECK
 995         if (i < 0)
 996                 {
 997                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
 998                 abort(); /* ok */
 999                 }
1000 #endif
1001         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1002
1003         if (a->sessions != NULL)
1004                 {
1005                 SSL_CTX_flush_sessions(a,0);
1006                 lh_free(a->sessions);
1007                 }
1008         if (a->cert_store != NULL)
1009                 X509_STORE_free(a->cert_store);
1010         if (a->cipher_list != NULL)
1011                 sk_free(a->cipher_list);
1012         if (a->cipher_list_by_id != NULL)
1013                 sk_free(a->cipher_list_by_id);
1014         if (a->default_cert != NULL)
1015                 ssl_cert_free(a->default_cert);
1016         if (a->client_CA != NULL)
1017                 sk_pop_free(a->client_CA,X509_NAME_free);
1018         if (a->extra_certs != NULL)
1019                 sk_pop_free(a->extra_certs,X509_free);
1020         if (a->comp_methods != NULL)
1021                 sk_pop_free(a->comp_methods,free);
1022         Free((char *)a);
1023         }
1024
1025 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1026         {
1027         ctx->default_passwd_callback=cb;
1028         }
1029
1030 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1031         {
1032         ctx->app_verify_callback=cb;
1033         ctx->app_verify_arg=arg;
1034         }
1035
1036 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1037         {
1038         ctx->verify_mode=mode;
1039         ctx->default_verify_callback=cb;
1040         /* This needs cleaning up EAY EAY EAY */
1041         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1042         }
1043
1044 void ssl_set_cert_masks(CERT *c,SSL_CIPHER *cipher)
1045         {
1046         CERT_PKEY *cpk;
1047         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1048         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1049         int rsa_tmp_export,dh_tmp_export,kl;
1050         unsigned long mask,emask;
1051
1052         if ((c == NULL) || (c->valid)) return;
1053
1054         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1055
1056 #ifndef NO_RSA
1057         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1058         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1059                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1060 #else
1061         rsa_tmp=rsa_tmp_export=0;
1062 #endif
1063 #ifndef NO_DH
1064         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1065         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1066                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1067 #else
1068         dh_tmp=dh_tmp_export=0;
1069 #endif
1070
1071         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1072         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1073         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1074         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1075         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1076         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1077         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1078         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1079         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1080         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1081         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1082 /* FIX THIS EAY EAY EAY */
1083         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1084         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1085
1086         mask=0;
1087         emask=0;
1088
1089 #ifdef CIPHER_DEBUG
1090         printf("rt=%d dht=%d re=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1091                 rsa_tmp,dh_tmp,
1092                 rsa_enc,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1093 #endif
1094
1095         if (rsa_enc || (rsa_tmp && rsa_sign))
1096                 mask|=SSL_kRSA;
1097         if (rsa_enc_export || (rsa_tmp_export && rsa_sign))
1098                 emask|=SSL_kRSA;
1099
1100 #if 0
1101         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1102         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1103                 (rsa_enc || rsa_sign || dsa_sign))
1104                 mask|=SSL_kEDH;
1105         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1106                 (rsa_enc || rsa_sign || dsa_sign))
1107                 emask|=SSL_kEDH;
1108 #endif
1109
1110         if (dh_tmp_export)
1111                 emask|=SSL_kEDH;
1112
1113         if (dh_tmp)
1114                 mask|=SSL_kEDH;
1115
1116         if (dh_rsa) mask|=SSL_kDHr;
1117         if (dh_rsa_export) emask|=SSL_kDHr;
1118
1119         if (dh_dsa) mask|=SSL_kDHd;
1120         if (dh_dsa_export) emask|=SSL_kDHd;
1121
1122         if (rsa_enc || rsa_sign)
1123                 {
1124                 mask|=SSL_aRSA;
1125                 emask|=SSL_aRSA;
1126                 }
1127
1128         if (dsa_sign)
1129                 {
1130                 mask|=SSL_aDSS;
1131                 emask|=SSL_aDSS;
1132                 }
1133
1134 #ifdef SSL_ALLOW_ADH
1135         mask|=SSL_aNULL;
1136         emask|=SSL_aNULL;
1137 #endif
1138
1139         c->mask=mask;
1140         c->export_mask=emask;
1141         c->valid=1;
1142         }
1143
1144 /* THIS NEEDS CLEANING UP */
1145 X509 *ssl_get_server_send_cert(SSL *s)
1146         {
1147         unsigned long alg,mask,kalg;
1148         CERT *c;
1149         int i,export;
1150
1151         c=s->cert;
1152         ssl_set_cert_masks(c,s->s3->tmp.new_cipher);
1153         alg=s->s3->tmp.new_cipher->algorithms;
1154         export=SSL_IS_EXPORT(alg);
1155         mask=export?c->export_mask:c->mask;
1156         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1157
1158         if      (kalg & SSL_kDHr)
1159                 i=SSL_PKEY_DH_RSA;
1160         else if (kalg & SSL_kDHd)
1161                 i=SSL_PKEY_DH_DSA;
1162         else if (kalg & SSL_aDSS)
1163                 i=SSL_PKEY_DSA_SIGN;
1164         else if (kalg & SSL_aRSA)
1165                 {
1166                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1167                         i=SSL_PKEY_RSA_SIGN;
1168                 else
1169                         i=SSL_PKEY_RSA_ENC;
1170                 }
1171         else /* if (kalg & SSL_aNULL) */
1172                 {
1173                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1174                 return(NULL);
1175                 }
1176         if (c->pkeys[i].x509 == NULL) return(NULL);
1177         return(c->pkeys[i].x509);
1178         }
1179
1180 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1181         {
1182         unsigned long alg;
1183         CERT *c;
1184
1185         alg=cipher->algorithms;
1186         c=s->cert;
1187
1188         if ((alg & SSL_aDSS) &&
1189                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1190                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1191         else if (alg & SSL_aRSA)
1192                 {
1193                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1194                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1195                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1196                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1197                 else
1198                         return(NULL);
1199                 }
1200         else /* if (alg & SSL_aNULL) */
1201                 {
1202                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1203                 return(NULL);
1204                 }
1205         }
1206
1207 void ssl_update_cache(SSL *s,int mode)
1208         {
1209         int i;
1210
1211         /* If the session_id_length is 0, we are not supposed to cache it,
1212          * and it would be rather hard to do anyway :-) */
1213         if (s->session->session_id_length == 0) return;
1214
1215         if ((s->ctx->session_cache_mode & mode)
1216                 && (!s->hit)
1217                 && SSL_CTX_add_session(s->ctx,s->session)
1218                 && (s->ctx->new_session_cb != NULL))
1219                 {
1220                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1221                 if (!s->ctx->new_session_cb(s,s->session))
1222                         SSL_SESSION_free(s->session);
1223                 }
1224
1225         /* auto flush every 255 connections */
1226         i=s->ctx->session_cache_mode;
1227         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1228                 ((i & mode) == mode))
1229                 {
1230                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1231                         ?s->ctx->stats.sess_connect_good
1232                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1233                         {
1234                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1235                         }
1236                 }
1237         }
1238
1239 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1240         {
1241         return(s->method);
1242         }
1243
1244 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1245         {
1246         int conn= -1;
1247         int ret=1;
1248
1249         if (s->method != meth)
1250                 {
1251                 if (s->handshake_func != NULL)
1252                         conn=(s->handshake_func == s->method->ssl_connect);
1253
1254                 if (s->method->version == meth->version)
1255                         s->method=meth;
1256                 else
1257                         {
1258                         s->method->ssl_free(s);
1259                         s->method=meth;
1260                         ret=s->method->ssl_new(s);
1261                         }
1262
1263                 if (conn == 1)
1264                         s->handshake_func=meth->ssl_connect;
1265                 else if (conn == 0)
1266                         s->handshake_func=meth->ssl_accept;
1267                 }
1268         return(ret);
1269         }
1270
1271 int SSL_get_error(SSL *s,int i)
1272         {
1273         int reason;
1274         unsigned long l;
1275         BIO *bio;
1276
1277         if (i > 0) return(SSL_ERROR_NONE);
1278
1279         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1280          * etc, where we do encode the error */
1281         if ((l=ERR_peek_error()) != 0)
1282                 {
1283                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1284                         return(SSL_ERROR_SYSCALL);
1285                 else
1286                         return(SSL_ERROR_SSL);
1287                 }
1288
1289         if ((i < 0) && SSL_want_read(s))
1290                 {
1291                 bio=SSL_get_rbio(s);
1292                 if (BIO_should_read(bio))
1293                         return(SSL_ERROR_WANT_READ);
1294                 else if (BIO_should_write(bio))
1295                         return(SSL_ERROR_WANT_WRITE);
1296                 else if (BIO_should_io_special(bio))
1297                         {
1298                         reason=BIO_get_retry_reason(bio);
1299                         if (reason == BIO_RR_CONNECT)
1300                                 return(SSL_ERROR_WANT_CONNECT);
1301                         else
1302                                 return(SSL_ERROR_SYSCALL); /* unknown */
1303                         }
1304                 }
1305
1306         if ((i < 0) && SSL_want_write(s))
1307                 {
1308                 bio=SSL_get_wbio(s);
1309                 if (BIO_should_write(bio))
1310                         return(SSL_ERROR_WANT_WRITE);
1311                 else if (BIO_should_read(bio))
1312                         return(SSL_ERROR_WANT_READ);
1313                 else if (BIO_should_io_special(bio))
1314                         {
1315                         reason=BIO_get_retry_reason(bio);
1316                         if (reason == BIO_RR_CONNECT)
1317                                 return(SSL_ERROR_WANT_CONNECT);
1318                         else
1319                                 return(SSL_ERROR_SYSCALL);
1320                         }
1321                 }
1322         if ((i < 0) && SSL_want_x509_lookup(s))
1323                 {
1324                 return(SSL_ERROR_WANT_X509_LOOKUP);
1325                 }
1326
1327         if (i == 0)
1328                 {
1329                 if (s->version == SSL2_VERSION)
1330                         {
1331                         /* assume it is the socket being closed */
1332                         return(SSL_ERROR_ZERO_RETURN);
1333                         }
1334                 else
1335                         {
1336                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1337                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1338                                 return(SSL_ERROR_ZERO_RETURN);
1339                         }
1340                 }
1341         return(SSL_ERROR_SYSCALL);
1342         }
1343
1344 int SSL_do_handshake(SSL *s)
1345         {
1346         int ret=1;
1347
1348         if (s->handshake_func == NULL)
1349                 {
1350                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1351                 return(-1);
1352                 }
1353
1354         s->method->ssl_renegotiate_check(s);
1355
1356         if (SSL_in_init(s) || SSL_in_before(s))
1357                 {
1358                 ret=s->handshake_func(s);
1359                 }
1360         return(ret);
1361         }
1362
1363 /* For the next 2 functions, SSL_clear() sets shutdown and so
1364  * one of these calls will reset it */
1365 void SSL_set_accept_state(SSL *s)
1366         {
1367         s->server=1;
1368         s->shutdown=0;
1369         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1370         s->handshake_func=s->method->ssl_accept;
1371         /* clear the current cipher */
1372         ssl_clear_cipher_ctx(s);
1373         }
1374
1375 void SSL_set_connect_state(SSL *s)
1376         {
1377         s->server=0;
1378         s->shutdown=0;
1379         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1380         s->handshake_func=s->method->ssl_connect;
1381         /* clear the current cipher */
1382         ssl_clear_cipher_ctx(s);
1383         }
1384
1385 int ssl_undefined_function(SSL *s)
1386         {
1387         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1388         return(0);
1389         }
1390
1391 SSL_METHOD *ssl_bad_method(int ver)
1392         {
1393         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1394         return(NULL);
1395         }
1396
1397 char *SSL_get_version(SSL *s)
1398         {
1399         if (s->version == TLS1_VERSION)
1400                 return("TLSv1");
1401         else if (s->version == SSL3_VERSION)
1402                 return("SSLv3");
1403         else if (s->version == SSL2_VERSION)
1404                 return("SSLv2");
1405         else
1406                 return("unknown");
1407         }
1408
1409 SSL *SSL_dup(SSL *s)
1410         {
1411         STACK *sk;
1412         X509_NAME *xn;
1413         SSL *ret;
1414         int i;
1415
1416         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL) return(NULL);
1417
1418         /* This copies version, session-id, SSL_METHOD and 'cert' */
1419         SSL_copy_session_id(ret,s);
1420
1421         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1422         SSL_set_verify(ret,SSL_get_verify_mode(s),
1423                 SSL_get_verify_callback(s));
1424
1425         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1426
1427         ret->debug=s->debug;
1428         ret->options=s->options;
1429
1430         /* copy app data, a little dangerous perhaps */
1431         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1432                 goto err;
1433
1434         /* setup rbio, and wbio */
1435         if (s->rbio != NULL)
1436                 {
1437                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1438                         goto err;
1439                 }
1440         if (s->wbio != NULL)
1441                 {
1442                 if (s->wbio != s->rbio)
1443                         {
1444                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1445                                 goto err;
1446                         }
1447                 else
1448                         ret->wbio=ret->rbio;
1449                 }
1450
1451         /* dup the cipher_list and cipher_list_by_id stacks */
1452         if (s->cipher_list != NULL)
1453                 {
1454                 if ((ret->cipher_list=sk_dup(s->cipher_list)) == NULL)
1455                         goto err;
1456                 }
1457         if (s->cipher_list_by_id != NULL)
1458                 if ((ret->cipher_list_by_id=sk_dup(s->cipher_list_by_id))
1459                         == NULL)
1460                         goto err;
1461
1462         /* Dup the client_CA list */
1463         if (s->client_CA != NULL)
1464                 {
1465                 if ((sk=sk_dup(s->client_CA)) == NULL) goto err;
1466                 ret->client_CA=sk;
1467                 for (i=0; i<sk_num(sk); i++)
1468                         {
1469                         xn=(X509_NAME *)sk_value(sk,i);
1470                         if ((sk_value(sk,i)=(char *)X509_NAME_dup(xn)) == NULL)
1471                                 {
1472                                 X509_NAME_free(xn);
1473                                 goto err;
1474                                 }
1475                         }
1476                 }
1477
1478         ret->shutdown=s->shutdown;
1479         ret->state=s->state;
1480         ret->handshake_func=s->handshake_func;
1481         ret->server=s->server;
1482
1483         if (0)
1484                 {
1485 err:
1486                 if (ret != NULL) SSL_free(ret);
1487                 ret=NULL;
1488                 }
1489         return(ret);
1490         }
1491
1492 void ssl_clear_cipher_ctx(SSL *s)
1493         {
1494         if (s->enc_read_ctx != NULL)
1495                 {
1496                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1497                 Free(s->enc_read_ctx);
1498                 s->enc_read_ctx=NULL;
1499                 }
1500         if (s->enc_write_ctx != NULL)
1501                 {
1502                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1503                 Free(s->enc_write_ctx);
1504                 s->enc_write_ctx=NULL;
1505                 }
1506         if (s->expand != NULL)
1507                 {
1508                 COMP_CTX_free(s->expand);
1509                 s->expand=NULL;
1510                 }
1511         if (s->compress != NULL)
1512                 {
1513                 COMP_CTX_free(s->compress);
1514                 s->compress=NULL;
1515                 }
1516         }
1517
1518 /* Fix this function so that it takes an optional type parameter */
1519 X509 *SSL_get_certificate(SSL *s)
1520         {
1521         if (s->cert != NULL)
1522                 return(s->cert->key->x509);
1523         else
1524                 return(NULL);
1525         }
1526
1527 /* Fix this function so that it takes an optional type parameter */
1528 EVP_PKEY *SSL_get_privatekey(SSL *s)
1529         {
1530         if (s->cert != NULL)
1531                 return(s->cert->key->privatekey);
1532         else
1533                 return(NULL);
1534         }
1535
1536 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1537         {
1538         if ((s->session != NULL) && (s->session->cipher != NULL))
1539                 return(s->session->cipher);
1540         return(NULL);
1541         }
1542
1543 int ssl_init_wbio_buffer(SSL *s,int push)
1544         {
1545         BIO *bbio;
1546
1547         if (s->bbio == NULL)
1548                 {
1549                 bbio=BIO_new(BIO_f_buffer());
1550                 if (bbio == NULL) return(0);
1551                 s->bbio=bbio;
1552                 }
1553         else
1554                 {
1555                 bbio=s->bbio;
1556                 if (s->bbio == s->wbio)
1557                         s->wbio=BIO_pop(s->wbio);
1558                 }
1559         BIO_reset(bbio);
1560 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1561         if (!BIO_set_read_buffer_size(bbio,1))
1562                 {
1563                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1564                 return(0);
1565                 }
1566         if (push)
1567                 {
1568                 if (s->wbio != bbio)
1569                         s->wbio=BIO_push(bbio,s->wbio);
1570                 }
1571         else
1572                 {
1573                 if (s->wbio == bbio)
1574                         s->wbio=BIO_pop(bbio);
1575                 }
1576         return(1);
1577         }
1578
1579 void ssl_free_wbio_buffer(SSL *s)
1580         {
1581         BIO *under;
1582
1583         if (s->bbio == NULL) return;
1584
1585         if (s->bbio == s->wbio)
1586                 {
1587                 /* remove buffering */
1588                 under=BIO_pop(s->wbio);
1589                 if (under != NULL)
1590                         s->wbio=under;
1591                 else
1592                         abort(); /* ok */
1593                 }
1594         BIO_free(s->bbio);
1595         s->bbio=NULL;
1596         }
1597
1598 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1599         {
1600         ctx->quiet_shutdown=mode;
1601         }
1602
1603 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1604         {
1605         return(ctx->quiet_shutdown);
1606         }
1607
1608 void SSL_set_quiet_shutdown(SSL *s,int mode)
1609         {
1610         s->quiet_shutdown=mode;
1611         }
1612
1613 int SSL_get_quiet_shutdown(SSL *s)
1614         {
1615         return(s->quiet_shutdown);
1616         }
1617
1618 void SSL_set_shutdown(SSL *s,int mode)
1619         {
1620         s->shutdown=mode;
1621         }
1622
1623 int SSL_get_shutdown(SSL *s)
1624         {
1625         return(s->shutdown);
1626         }
1627
1628 int SSL_version(SSL *s)
1629         {
1630         return(s->version);
1631         }
1632
1633 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1634         {
1635         return(ssl->ctx);
1636         }
1637
1638 #ifndef NO_STDIO
1639 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1640         {
1641         return(X509_STORE_set_default_paths(ctx->cert_store));
1642         }
1643
1644 int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
1645         {
1646         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1647         }
1648 #endif
1649
1650 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1651         {
1652         ssl->info_callback=cb;
1653         }
1654
1655 void (*SSL_get_info_callback(SSL *ssl))()
1656         {
1657         return((void (*)())ssl->info_callback);
1658         }
1659
1660 int SSL_state(SSL *ssl)
1661         {
1662         return(ssl->state);
1663         }
1664
1665 void SSL_set_verify_result(SSL *ssl,long arg)
1666         {
1667         ssl->verify_result=arg;
1668         }
1669
1670 long SSL_get_verify_result(SSL *ssl)
1671         {
1672         return(ssl->verify_result);
1673         }
1674
1675 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1676                          int (*dup_func)(),void (*free_func)())
1677         {
1678         ssl_meth_num++;
1679         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1680                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1681         }
1682
1683 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1684         {
1685         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1686         }
1687
1688 void *SSL_get_ex_data(SSL *s,int idx)
1689         {
1690         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1691         }
1692
1693 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1694                              int (*dup_func)(),void (*free_func)())
1695         {
1696         ssl_ctx_meth_num++;
1697         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1698                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1699         }
1700
1701 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1702         {
1703         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1704         }
1705
1706 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1707         {
1708         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1709         }
1710
1711 int ssl_ok(SSL *s)
1712         {
1713         return(1);
1714         }
1715
1716 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1717         {
1718         return(ctx->cert_store);
1719         }
1720
1721 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1722         {
1723         if (ctx->cert_store != NULL)
1724                 X509_STORE_free(ctx->cert_store);
1725         ctx->cert_store=store;
1726         }
1727
1728 int SSL_want(SSL *s)
1729         {
1730         return(s->rwstate);
1731         }
1732
1733 /*!
1734  * \brief Set the callback for generating temporary RSA keys.
1735  * \param ctx the SSL context.
1736  * \param cb the callback
1737  */
1738
1739 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1740                                                           int keylength))
1741     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1742
1743 #ifdef DOXYGEN
1744 /*!
1745  * \brief The RSA temporary key callback function.
1746  * \param ssl the SSL session.
1747  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1748  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1749  * the required key in bits.
1750  * \return the temporary RSA key.
1751  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1752  */
1753
1754 RSA *cb(SSL *ssl,int export,int keylength)
1755     {}
1756 #endif
1757
1758 /*!
1759  * \brief Set the callback for generating temporary DH keys.
1760  * \param ctx the SSL context.
1761  * \param dh the callback
1762  */
1763
1764 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1765                                                         int keylength))
1766     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1767
1768 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1769                                                           int keylength))
1770     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1771
1772 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1773                                                         int keylength))
1774     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1775
1776 #if defined(_WINDLL) && defined(WIN16)
1777 #include "../crypto/bio/bss_file.c"
1778 #endif