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_VERSION_TEXT;
  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_OF(SSL_CIPHER) *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_SSL_CIPHER_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 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 220                                unsigned int sid_ctx_len)
 221     {
 222     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 223         {
 224         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 225         return 0;
 226         }
 227     ssl->sid_ctx_length=sid_ctx_len;
 228     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 229
 230     return 1;
 231     }
 232
 233 void SSL_free(SSL *s)
 234         {
 235         int i;
 236
 237         if(s == NULL)
 238             return;
 239
 240         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 241 #ifdef REF_PRINT
 242         REF_PRINT("SSL",s);
 243 #endif
 244         if (i > 0) return;
 245 #ifdef REF_CHECK
 246         if (i < 0)
 247                 {
 248                 fprintf(stderr,"SSL_free, bad reference count\n");
 249                 abort(); /* ok */
 250                 }
 251 #endif
 252
 253         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 254
 255         if (s->bbio != NULL)
 256                 {
 257                 /* If the buffering BIO is in place, pop it off */
 258                 if (s->bbio == s->wbio)
 259                         {
 260                         s->wbio=BIO_pop(s->wbio);
 261                         }
 262                 BIO_free(s->bbio);
 263                 s->bbio=NULL;
 264                 }
 265         if (s->rbio != NULL)
 266                 BIO_free_all(s->rbio);
 267         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 268                 BIO_free_all(s->wbio);
 269
 270         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 271
 272         /* add extra stuff */
 273         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 274         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 275
 276         /* Make the next call work :-) */
 277         if (s->session != NULL)
 278                 {
 279                 ssl_clear_bad_session(s);
 280                 SSL_SESSION_free(s->session);
 281                 }
 282
 283         ssl_clear_cipher_ctx(s);
 284
 285         if (s->cert != NULL) ssl_cert_free(s->cert);
 286         /* Free up if allocated */
 287
 288         if (s->ctx) SSL_CTX_free(s->ctx);
 289
 290         if (s->client_CA != NULL)
 291                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 292
 293         if (s->method != NULL) s->method->ssl_free(s);
 294
 295         Free((char *)s);
 296         }
 297
 298 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 299         {
 300         /* If the output buffering BIO is still in place, remove it
 301          */
 302         if (s->bbio != NULL)
 303                 {
 304                 if (s->wbio == s->bbio)
 305                         {
 306                         s->wbio=s->wbio->next_bio;
 307                         s->bbio->next_bio=NULL;
 308                         }
 309                 }
 310         if ((s->rbio != NULL) && (s->rbio != rbio))
 311                 BIO_free_all(s->rbio);
 312         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 313                 BIO_free_all(s->wbio);
 314         s->rbio=rbio;
 315         s->wbio=wbio;
 316         }
 317
 318 BIO *SSL_get_rbio(SSL *s)
 319         { return(s->rbio); }
 320
 321 BIO *SSL_get_wbio(SSL *s)
 322         { return(s->wbio); }
 323
 324 int SSL_get_fd(SSL *s)
 325         {
 326         int ret= -1;
 327         BIO *b,*r;
 328
 329         b=SSL_get_rbio(s);
 330         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 331         if (r != NULL)
 332                 BIO_get_fd(r,&ret);
 333         return(ret);
 334         }
 335
 336 #ifndef NO_SOCK
 337 int SSL_set_fd(SSL *s,int fd)
 338         {
 339         int ret=0;
 340         BIO *bio=NULL;
 341
 342         bio=BIO_new(BIO_s_socket());
 343
 344         if (bio == NULL)
 345                 {
 346                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 347                 goto err;
 348                 }
 349         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 350         SSL_set_bio(s,bio,bio);
 351         ret=1;
 352 err:
 353         return(ret);
 354         }
 355
 356 int SSL_set_wfd(SSL *s,int fd)
 357         {
 358         int ret=0;
 359         BIO *bio=NULL;
 360
 361         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 362                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 363                 {
 364                 bio=BIO_new(BIO_s_socket());
 365
 366                 if (bio == NULL)
 367                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 368                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 369                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 370                 }
 371         else
 372                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 373         ret=1;
 374 err:
 375         return(ret);
 376         }
 377
 378 int SSL_set_rfd(SSL *s,int fd)
 379         {
 380         int ret=0;
 381         BIO *bio=NULL;
 382
 383         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 384                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 385                 {
 386                 bio=BIO_new(BIO_s_socket());
 387
 388                 if (bio == NULL)
 389                         {
 390                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 391                         goto err;
 392                         }
 393                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 394                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 395                 }
 396         else
 397                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 398         ret=1;
 399 err:
 400         return(ret);
 401         }
 402 #endif
 403
 404 int SSL_get_verify_mode(SSL *s)
 405         {
 406         return(s->verify_mode);
 407         }
 408
 409 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
 410         {
 411         return(s->verify_callback);
 412         }
 413
 414 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
 415         {
 416         return(ctx->verify_mode);
 417         }
 418
 419 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
 420         {
 421         return(ctx->default_verify_callback);
 422         }
 423
 424 void SSL_set_verify(SSL *s,int mode,
 425                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 426         {
 427         s->verify_mode=mode;
 428         if (callback != NULL)
 429                 s->verify_callback=callback;
 430         }
 431
 432 void SSL_set_read_ahead(SSL *s,int yes)
 433         {
 434         s->read_ahead=yes;
 435         }
 436
 437 int SSL_get_read_ahead(SSL *s)
 438         {
 439         return(s->read_ahead);
 440         }
 441
 442 int SSL_pending(SSL *s)
 443         {
 444         return(s->method->ssl_pending(s));
 445         }
 446
 447 X509 *SSL_get_peer_certificate(SSL *s)
 448         {
 449         X509 *r;
 450
 451         if ((s == NULL) || (s->session == NULL))
 452                 r=NULL;
 453         else
 454                 r=s->session->peer;
 455
 456         if (r == NULL) return(r);
 457
 458         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 459
 460         return(r);
 461         }
 462
 463 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
 464         {
 465         STACK_OF(X509) *r;
 466
 467         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
 468                 r=NULL;
 469         else
 470                 r=s->session->cert->cert_chain;
 471
 472         return(r);
 473         }
 474
 475 /* Now in theory, since the calling process own 't' it should be safe to
 476  * modify.  We need to be able to read f without being hassled */
 477 void SSL_copy_session_id(SSL *t,SSL *f)
 478         {
 479         CERT *tmp;
 480
 481         /* Do we need to to SSL locking? */
 482         SSL_set_session(t,SSL_get_session(f));
 483
 484         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 485          * vice-versa */
 486         if (t->method != f->method)
 487                 {
 488                 t->method->ssl_free(t); /* cleanup current */
 489                 t->method=f->method;    /* change method */
 490                 t->method->ssl_new(t);  /* setup new */
 491                 }
 492
 493         tmp=t->cert;
 494         if (f->cert != NULL)
 495                 {
 496                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 497                 t->cert=f->cert;
 498                 }
 499         else
 500                 t->cert=NULL;
 501         if (tmp != NULL) ssl_cert_free(tmp);
 502         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 503         }
 504
 505 /* Fix this so it checks all the valid key/cert options */
 506 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 507         {
 508         if (    (ctx == NULL) ||
 509                 (ctx->default_cert == NULL) ||
 510                 (ctx->default_cert->key->x509 == NULL))
 511                 {
 512                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 513                 return(0);
 514                 }
 515         if      (ctx->default_cert->key->privatekey == NULL)
 516                 {
 517                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 518                 return(0);
 519                 }
 520         return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
 521         }
 522
 523 /* Fix this function so that it takes an optional type parameter */
 524 int SSL_check_private_key(SSL *ssl)
 525         {
 526         if (ssl == NULL)
 527                 {
 528                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 529                 return(0);
 530                 }
 531         if (ssl->cert == NULL)
 532                 return(SSL_CTX_check_private_key(ssl->ctx));
 533         if (ssl->cert->key->x509 == NULL)
 534                 {
 535                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 536                 return(0);
 537                 }
 538         if (ssl->cert->key->privatekey == NULL)
 539                 {
 540                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 541                 return(0);
 542                 }
 543         return(X509_check_private_key(ssl->cert->key->x509,
 544                 ssl->cert->key->privatekey));
 545         }
 546
 547 int SSL_accept(SSL *s)
 548         {
 549         return(s->method->ssl_accept(s));
 550         }
 551
 552 int SSL_connect(SSL *s)
 553         {
 554         return(s->method->ssl_connect(s));
 555         }
 556
 557 long SSL_get_default_timeout(SSL *s)
 558         {
 559         return(s->method->get_timeout());
 560         }
 561
 562 int SSL_read(SSL *s,char *buf,int num)
 563         {
 564         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 565                 {
 566                 s->rwstate=SSL_NOTHING;
 567                 return(0);
 568                 }
 569         return(s->method->ssl_read(s,buf,num));
 570         }
 571
 572 int SSL_peek(SSL *s,char *buf,int num)
 573         {
 574         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 575                 {
 576                 return(0);
 577                 }
 578         return(s->method->ssl_peek(s,buf,num));
 579         }
 580
 581 int SSL_write(SSL *s,const char *buf,int num)
 582         {
 583         if (s->shutdown & SSL_SENT_SHUTDOWN)
 584                 {
 585                 s->rwstate=SSL_NOTHING;
 586                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 587                 return(-1);
 588                 }
 589         return(s->method->ssl_write(s,buf,num));
 590         }
 591
 592 int SSL_shutdown(SSL *s)
 593         {
 594         if ((s != NULL) && !SSL_in_init(s))
 595                 return(s->method->ssl_shutdown(s));
 596         else
 597                 return(1);
 598         }
 599
 600 int SSL_renegotiate(SSL *s)
 601         {
 602         s->new_session=1;
 603         return(s->method->ssl_renegotiate(s));
 604         }
 605
 606 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 607         {
 608         long l;
 609
 610         switch (cmd)
 611                 {
 612         case SSL_CTRL_GET_READ_AHEAD:
 613                 return(s->read_ahead);
 614         case SSL_CTRL_SET_READ_AHEAD:
 615                 l=s->read_ahead;
 616                 s->read_ahead=larg;
 617                 return(l);
 618         case SSL_CTRL_OPTIONS:
 619                 return(s->options|=larg);
 620         default:
 621                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 622                 }
 623         return(0);
 624         }
 625
 626 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 627         {
 628         long l;
 629
 630         switch (cmd)
 631                 {
 632         case SSL_CTRL_GET_READ_AHEAD:
 633                 return(ctx->read_ahead);
 634         case SSL_CTRL_SET_READ_AHEAD:
 635                 l=ctx->read_ahead;
 636                 ctx->read_ahead=larg;
 637                 return(l);
 638
 639         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 640                 l=ctx->session_cache_size;
 641                 ctx->session_cache_size=larg;
 642                 return(l);
 643         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 644                 return(ctx->session_cache_size);
 645         case SSL_CTRL_SET_SESS_CACHE_MODE:
 646                 l=ctx->session_cache_mode;
 647                 ctx->session_cache_mode=larg;
 648                 return(l);
 649         case SSL_CTRL_GET_SESS_CACHE_MODE:
 650                 return(ctx->session_cache_mode);
 651
 652         case SSL_CTRL_SESS_NUMBER:
 653                 return(ctx->sessions->num_items);
 654         case SSL_CTRL_SESS_CONNECT:
 655                 return(ctx->stats.sess_connect);
 656         case SSL_CTRL_SESS_CONNECT_GOOD:
 657                 return(ctx->stats.sess_connect_good);
 658         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 659                 return(ctx->stats.sess_connect_renegotiate);
 660         case SSL_CTRL_SESS_ACCEPT:
 661                 return(ctx->stats.sess_accept);
 662         case SSL_CTRL_SESS_ACCEPT_GOOD:
 663                 return(ctx->stats.sess_accept_good);
 664         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 665                 return(ctx->stats.sess_accept_renegotiate);
 666         case SSL_CTRL_SESS_HIT:
 667                 return(ctx->stats.sess_hit);
 668         case SSL_CTRL_SESS_CB_HIT:
 669                 return(ctx->stats.sess_cb_hit);
 670         case SSL_CTRL_SESS_MISSES:
 671                 return(ctx->stats.sess_miss);
 672         case SSL_CTRL_SESS_TIMEOUTS:
 673                 return(ctx->stats.sess_timeout);
 674         case SSL_CTRL_SESS_CACHE_FULL:
 675                 return(ctx->stats.sess_cache_full);
 676         case SSL_CTRL_OPTIONS:
 677                 return(ctx->options|=larg);
 678         default:
 679                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 680                 }
 681         return(0);
 682         }
 683
 684 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 685         {
 686         long l;
 687
 688         l=a->id-b->id;
 689         if (l == 0L)
 690                 return(0);
 691         else
 692                 return((l > 0)?1:-1);
 693         }
 694
 695 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 696         {
 697         long l;
 698
 699         l=(*ap)->id-(*bp)->id;
 700         if (l == 0L)
 701                 return(0);
 702         else
 703                 return((l > 0)?1:-1);
 704         }
 705
 706 /** return a STACK of the ciphers available for the SSL and in order of
 707  * preference */
 708 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 709         {
 710         if ((s != NULL) && (s->cipher_list != NULL))
 711                 {
 712                 return(s->cipher_list);
 713                 }
 714         else if ((s->ctx != NULL) &&
 715                 (s->ctx->cipher_list != NULL))
 716                 {
 717                 return(s->ctx->cipher_list);
 718                 }
 719         return(NULL);
 720         }
 721
 722 /** return a STACK of the ciphers available for the SSL and in order of
 723  * algorithm id */
 724 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 725         {
 726         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 727                 {
 728                 return(s->cipher_list_by_id);
 729                 }
 730         else if ((s != NULL) && (s->ctx != NULL) &&
 731                 (s->ctx->cipher_list_by_id != NULL))
 732                 {
 733                 return(s->ctx->cipher_list_by_id);
 734                 }
 735         return(NULL);
 736         }
 737
 738 /** The old interface to get the same thing as SSL_get_ciphers() */
 739 const char *SSL_get_cipher_list(SSL *s,int n)
 740         {
 741         SSL_CIPHER *c;
 742         STACK_OF(SSL_CIPHER) *sk;
 743
 744         if (s == NULL) return(NULL);
 745         sk=SSL_get_ciphers(s);
 746         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 747                 return(NULL);
 748         c=sk_SSL_CIPHER_value(sk,n);
 749         if (c == NULL) return(NULL);
 750         return(c->name);
 751         }
 752
 753 /** specify the ciphers to be used by defaut by the SSL_CTX */
 754 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 755         {
 756         STACK_OF(SSL_CIPHER) *sk;
 757
 758         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 759                 &ctx->cipher_list_by_id,str);
 760 /* XXXX */
 761         return((sk == NULL)?0:1);
 762         }
 763
 764 /** specify the ciphers to be used by the SSL */
 765 int SSL_set_cipher_list(SSL *s,char *str)
 766         {
 767         STACK_OF(SSL_CIPHER) *sk;
 768
 769         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 770                 &s->cipher_list_by_id,str);
 771 /* XXXX */
 772         return((sk == NULL)?0:1);
 773         }
 774
 775 /* works well for SSLv2, not so good for SSLv3 */
 776 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 777         {
 778         char *p;
 779         const char *cp;
 780         STACK_OF(SSL_CIPHER) *sk;
 781         SSL_CIPHER *c;
 782         int i;
 783
 784         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 785                 (len < 2))
 786                 return(NULL);
 787
 788         p=buf;
 789         sk=s->session->ciphers;
 790         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 791                 {
 792                 /* Decrement for either the ':' or a '\0' */
 793                 len--;
 794                 c=sk_SSL_CIPHER_value(sk,i);
 795                 for (cp=c->name; *cp; )
 796                         {
 797                         if (len-- == 0)
 798                                 {
 799                                 *p='\0';
 800                                 return(buf);
 801                                 }
 802                         else
 803                                 *(p++)= *(cp++);
 804                         }
 805                 *(p++)=':';
 806                 }
 807         p[-1]='\0';
 808         return(buf);
 809         }
 810
 811 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
 812         {
 813         int i,j=0;
 814         SSL_CIPHER *c;
 815         unsigned char *q;
 816
 817         if (sk == NULL) return(0);
 818         q=p;
 819
 820         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 821                 {
 822                 c=sk_SSL_CIPHER_value(sk,i);
 823                 j=ssl_put_cipher_by_char(s,c,p);
 824                 p+=j;
 825                 }
 826         return(p-q);
 827         }
 828
 829 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 830                                                STACK_OF(SSL_CIPHER) **skp)
 831         {
 832         SSL_CIPHER *c;
 833         STACK_OF(SSL_CIPHER) *sk;
 834         int i,n;
 835
 836         n=ssl_put_cipher_by_char(s,NULL,NULL);
 837         if ((num%n) != 0)
 838                 {
 839                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 840                 return(NULL);
 841                 }
 842         if ((skp == NULL) || (*skp == NULL))
 843                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
 844         else
 845                 {
 846                 sk= *skp;
 847                 sk_SSL_CIPHER_zero(sk);
 848                 }
 849
 850         for (i=0; i<num; i+=n)
 851                 {
 852                 c=ssl_get_cipher_by_char(s,p);
 853                 p+=n;
 854                 if (c != NULL)
 855                         {
 856                         if (!sk_SSL_CIPHER_push(sk,c))
 857                                 {
 858                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 859                                 goto err;
 860                                 }
 861                         }
 862                 }
 863
 864         if (skp != NULL)
 865                 *skp=sk;
 866         return(sk);
 867 err:
 868         if ((skp == NULL) || (*skp == NULL))
 869                 sk_SSL_CIPHER_free(sk);
 870         return(NULL);
 871         }
 872
 873 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 874         {
 875         unsigned long l;
 876
 877         l=(unsigned long)
 878                 ((unsigned int) a->session_id[0]     )|
 879                 ((unsigned int) a->session_id[1]<< 8L)|
 880                 ((unsigned long)a->session_id[2]<<16L)|
 881                 ((unsigned long)a->session_id[3]<<24L);
 882         return(l);
 883         }
 884
 885 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 886         {
 887         if (a->ssl_version != b->ssl_version)
 888                 return(1);
 889         if (a->session_id_length != b->session_id_length)
 890                 return(1);
 891         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 892         }
 893
 894 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 895         {
 896         SSL_CTX *ret=NULL;
 897
 898         if (meth == NULL)
 899                 {
 900                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 901                 return(NULL);
 902                 }
 903
 904         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 905                 {
 906                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 907                 goto err;
 908                 }
 909         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 910         if (ret == NULL)
 911                 goto err;
 912
 913         memset(ret,0,sizeof(SSL_CTX));
 914
 915         ret->method=meth;
 916
 917         ret->cert_store=NULL;
 918         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 919         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 920         ret->session_cache_head=NULL;
 921         ret->session_cache_tail=NULL;
 922
 923         /* We take the system default */
 924         ret->session_timeout=meth->get_timeout();
 925
 926         ret->new_session_cb=NULL;
 927         ret->remove_session_cb=NULL;
 928         ret->get_session_cb=NULL;
 929
 930         memset((char *)&ret->stats,0,sizeof(ret->stats));
 931
 932         ret->references=1;
 933         ret->quiet_shutdown=0;
 934
 935 /*      ret->cipher=NULL;*/
 936 /*      ret->s2->challenge=NULL;
 937         ret->master_key=NULL;
 938         ret->key_arg=NULL;
 939         ret->s2->conn_id=NULL; */
 940
 941         ret->info_callback=NULL;
 942
 943         ret->app_verify_callback=NULL;
 944         ret->app_verify_arg=NULL;
 945
 946         ret->read_ahead=0;
 947         ret->verify_mode=SSL_VERIFY_NONE;
 948         ret->default_verify_callback=NULL;
 949         if ((ret->default_cert=ssl_cert_new()) == NULL)
 950                 goto err;
 951
 952         ret->default_passwd_callback=NULL;
 953         ret->client_cert_cb=NULL;
 954
 955         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
 956         if (ret->sessions == NULL) goto err;
 957         ret->cert_store=X509_STORE_new();
 958         if (ret->cert_store == NULL) goto err;
 959
 960         ssl_create_cipher_list(ret->method,
 961                 &ret->cipher_list,&ret->cipher_list_by_id,
 962                 SSL_DEFAULT_CIPHER_LIST);
 963         if (ret->cipher_list == NULL
 964             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
 965                 {
 966                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
 967                 goto err2;
 968                 }
 969
 970         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
 971                 {
 972                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
 973                 goto err2;
 974                 }
 975         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
 976                 {
 977                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
 978                 goto err2;
 979                 }
 980         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
 981                 {
 982                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
 983                 goto err2;
 984                 }
 985
 986         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
 987                 goto err;
 988
 989         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
 990
 991         ret->extra_certs=NULL;
 992         ret->comp_methods=SSL_COMP_get_compression_methods();
 993
 994         return(ret);
 995 err:
 996         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
 997 err2:
 998         if (ret != NULL) SSL_CTX_free(ret);
 999         return(NULL);
1000         }
1001
1002 static void SSL_COMP_free(SSL_COMP *comp)
1003     { Free(comp); }
1004
1005 void SSL_CTX_free(SSL_CTX *a)
1006         {
1007         int i;
1008
1009         if (a == NULL) return;
1010
1011         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1012 #ifdef REF_PRINT
1013         REF_PRINT("SSL_CTX",a);
1014 #endif
1015         if (i > 0) return;
1016 #ifdef REF_CHECK
1017         if (i < 0)
1018                 {
1019                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1020                 abort(); /* ok */
1021                 }
1022 #endif
1023         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1024
1025         if (a->sessions != NULL)
1026                 {
1027                 SSL_CTX_flush_sessions(a,0);
1028                 lh_free(a->sessions);
1029                 }
1030         if (a->cert_store != NULL)
1031                 X509_STORE_free(a->cert_store);
1032         if (a->cipher_list != NULL)
1033                 sk_SSL_CIPHER_free(a->cipher_list);
1034         if (a->cipher_list_by_id != NULL)
1035                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1036         if (a->default_cert != NULL)
1037                 ssl_cert_free(a->default_cert);
1038         if (a->client_CA != NULL)
1039                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1040         if (a->extra_certs != NULL)
1041                 sk_X509_pop_free(a->extra_certs,X509_free);
1042         if (a->comp_methods != NULL)
1043                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1044         Free((char *)a);
1045         }
1046
1047 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1048         {
1049         ctx->default_passwd_callback=cb;
1050         }
1051
1052 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1053         {
1054         ctx->app_verify_callback=cb;
1055         ctx->app_verify_arg=arg;
1056         }
1057
1058 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1059         {
1060         ctx->verify_mode=mode;
1061         ctx->default_verify_callback=cb;
1062         /* This needs cleaning up EAY EAY EAY */
1063         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1064         }
1065
1066 /* Need default_cert to check for callbacks, for now (see comment in CERT
1067    strucure)
1068 */
1069 void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
1070         {
1071         CERT_PKEY *cpk;
1072         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1073         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1074         int rsa_tmp_export,dh_tmp_export,kl;
1075         unsigned long mask,emask;
1076
1077         if (c == NULL) return;
1078
1079         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1080
1081 #ifndef NO_RSA
1082         rsa_tmp=(c->rsa_tmp != NULL || default_cert->rsa_tmp_cb != NULL);
1083         rsa_tmp_export=(default_cert->rsa_tmp_cb != NULL ||
1084                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1085 #else
1086         rsa_tmp=rsa_tmp_export=0;
1087 #endif
1088 #ifndef NO_DH
1089         dh_tmp=(c->dh_tmp != NULL || default_cert->dh_tmp_cb != NULL);
1090         dh_tmp_export=(default_cert->dh_tmp_cb != NULL ||
1091                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1092 #else
1093         dh_tmp=dh_tmp_export=0;
1094 #endif
1095
1096         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1097         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1098         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1099         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1100         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1101         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1102         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1103         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1104         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1105         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1106         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1107 /* FIX THIS EAY EAY EAY */
1108         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1109         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1110
1111         mask=0;
1112         emask=0;
1113
1114 #ifdef CIPHER_DEBUG
1115         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1116                 rsa_tmp,rsa_tmp_export,dh_tmp,
1117                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1118 #endif
1119
1120         if (rsa_enc || (rsa_tmp && rsa_sign))
1121                 mask|=SSL_kRSA;
1122         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1123                 emask|=SSL_kRSA;
1124
1125 #if 0
1126         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1127         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1128                 (rsa_enc || rsa_sign || dsa_sign))
1129                 mask|=SSL_kEDH;
1130         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1131                 (rsa_enc || rsa_sign || dsa_sign))
1132                 emask|=SSL_kEDH;
1133 #endif
1134
1135         if (dh_tmp_export)
1136                 emask|=SSL_kEDH;
1137
1138         if (dh_tmp)
1139                 mask|=SSL_kEDH;
1140
1141         if (dh_rsa) mask|=SSL_kDHr;
1142         if (dh_rsa_export) emask|=SSL_kDHr;
1143
1144         if (dh_dsa) mask|=SSL_kDHd;
1145         if (dh_dsa_export) emask|=SSL_kDHd;
1146
1147         if (rsa_enc || rsa_sign)
1148                 {
1149                 mask|=SSL_aRSA;
1150                 emask|=SSL_aRSA;
1151                 }
1152
1153         if (dsa_sign)
1154                 {
1155                 mask|=SSL_aDSS;
1156                 emask|=SSL_aDSS;
1157                 }
1158
1159 #ifdef SSL_ALLOW_ADH
1160         mask|=SSL_aNULL;
1161         emask|=SSL_aNULL;
1162 #endif
1163
1164         c->mask=mask;
1165         c->export_mask=emask;
1166         c->valid=1;
1167         }
1168
1169 /* THIS NEEDS CLEANING UP */
1170 X509 *ssl_get_server_send_cert(SSL *s)
1171         {
1172         unsigned long alg,mask,kalg;
1173         CERT *c;
1174         int i,export;
1175
1176         c=s->cert;
1177         ssl_set_cert_masks(c,s->ctx->default_cert,s->s3->tmp.new_cipher);
1178         alg=s->s3->tmp.new_cipher->algorithms;
1179         export=SSL_IS_EXPORT(alg);
1180         mask=export?c->export_mask:c->mask;
1181         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1182
1183         if      (kalg & SSL_kDHr)
1184                 i=SSL_PKEY_DH_RSA;
1185         else if (kalg & SSL_kDHd)
1186                 i=SSL_PKEY_DH_DSA;
1187         else if (kalg & SSL_aDSS)
1188                 i=SSL_PKEY_DSA_SIGN;
1189         else if (kalg & SSL_aRSA)
1190                 {
1191                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1192                         i=SSL_PKEY_RSA_SIGN;
1193                 else
1194                         i=SSL_PKEY_RSA_ENC;
1195                 }
1196         else /* if (kalg & SSL_aNULL) */
1197                 {
1198                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1199                 return(NULL);
1200                 }
1201         if (c->pkeys[i].x509 == NULL) return(NULL);
1202         return(c->pkeys[i].x509);
1203         }
1204
1205 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1206         {
1207         unsigned long alg;
1208         CERT *c;
1209
1210         alg=cipher->algorithms;
1211         c=s->cert;
1212
1213         if ((alg & SSL_aDSS) &&
1214                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1215                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1216         else if (alg & SSL_aRSA)
1217                 {
1218                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1219                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1220                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1221                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1222                 else
1223                         return(NULL);
1224                 }
1225         else /* if (alg & SSL_aNULL) */
1226                 {
1227                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1228                 return(NULL);
1229                 }
1230         }
1231
1232 void ssl_update_cache(SSL *s,int mode)
1233         {
1234         int i;
1235
1236         /* If the session_id_length is 0, we are not supposed to cache it,
1237          * and it would be rather hard to do anyway :-) */
1238         if (s->session->session_id_length == 0) return;
1239
1240         if ((s->ctx->session_cache_mode & mode)
1241                 && (!s->hit)
1242                 && SSL_CTX_add_session(s->ctx,s->session)
1243                 && (s->ctx->new_session_cb != NULL))
1244                 {
1245                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1246                 if (!s->ctx->new_session_cb(s,s->session))
1247                         SSL_SESSION_free(s->session);
1248                 }
1249
1250         /* auto flush every 255 connections */
1251         i=s->ctx->session_cache_mode;
1252         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1253                 ((i & mode) == mode))
1254                 {
1255                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1256                         ?s->ctx->stats.sess_connect_good
1257                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1258                         {
1259                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1260                         }
1261                 }
1262         }
1263
1264 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1265         {
1266         return(s->method);
1267         }
1268
1269 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1270         {
1271         int conn= -1;
1272         int ret=1;
1273
1274         if (s->method != meth)
1275                 {
1276                 if (s->handshake_func != NULL)
1277                         conn=(s->handshake_func == s->method->ssl_connect);
1278
1279                 if (s->method->version == meth->version)
1280                         s->method=meth;
1281                 else
1282                         {
1283                         s->method->ssl_free(s);
1284                         s->method=meth;
1285                         ret=s->method->ssl_new(s);
1286                         }
1287
1288                 if (conn == 1)
1289                         s->handshake_func=meth->ssl_connect;
1290                 else if (conn == 0)
1291                         s->handshake_func=meth->ssl_accept;
1292                 }
1293         return(ret);
1294         }
1295
1296 int SSL_get_error(SSL *s,int i)
1297         {
1298         int reason;
1299         unsigned long l;
1300         BIO *bio;
1301
1302         if (i > 0) return(SSL_ERROR_NONE);
1303
1304         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1305          * etc, where we do encode the error */
1306         if ((l=ERR_peek_error()) != 0)
1307                 {
1308                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1309                         return(SSL_ERROR_SYSCALL);
1310                 else
1311                         return(SSL_ERROR_SSL);
1312                 }
1313
1314         if ((i < 0) && SSL_want_read(s))
1315                 {
1316                 bio=SSL_get_rbio(s);
1317                 if (BIO_should_read(bio))
1318                         return(SSL_ERROR_WANT_READ);
1319                 else if (BIO_should_write(bio))
1320                         return(SSL_ERROR_WANT_WRITE);
1321                 else if (BIO_should_io_special(bio))
1322                         {
1323                         reason=BIO_get_retry_reason(bio);
1324                         if (reason == BIO_RR_CONNECT)
1325                                 return(SSL_ERROR_WANT_CONNECT);
1326                         else
1327                                 return(SSL_ERROR_SYSCALL); /* unknown */
1328                         }
1329                 }
1330
1331         if ((i < 0) && SSL_want_write(s))
1332                 {
1333                 bio=SSL_get_wbio(s);
1334                 if (BIO_should_write(bio))
1335                         return(SSL_ERROR_WANT_WRITE);
1336                 else if (BIO_should_read(bio))
1337                         return(SSL_ERROR_WANT_READ);
1338                 else if (BIO_should_io_special(bio))
1339                         {
1340                         reason=BIO_get_retry_reason(bio);
1341                         if (reason == BIO_RR_CONNECT)
1342                                 return(SSL_ERROR_WANT_CONNECT);
1343                         else
1344                                 return(SSL_ERROR_SYSCALL);
1345                         }
1346                 }
1347         if ((i < 0) && SSL_want_x509_lookup(s))
1348                 {
1349                 return(SSL_ERROR_WANT_X509_LOOKUP);
1350                 }
1351
1352         if (i == 0)
1353                 {
1354                 if (s->version == SSL2_VERSION)
1355                         {
1356                         /* assume it is the socket being closed */
1357                         return(SSL_ERROR_ZERO_RETURN);
1358                         }
1359                 else
1360                         {
1361                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1362                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1363                                 return(SSL_ERROR_ZERO_RETURN);
1364                         }
1365                 }
1366         return(SSL_ERROR_SYSCALL);
1367         }
1368
1369 int SSL_do_handshake(SSL *s)
1370         {
1371         int ret=1;
1372
1373         if (s->handshake_func == NULL)
1374                 {
1375                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1376                 return(-1);
1377                 }
1378
1379         s->method->ssl_renegotiate_check(s);
1380
1381         if (SSL_in_init(s) || SSL_in_before(s))
1382                 {
1383                 ret=s->handshake_func(s);
1384                 }
1385         return(ret);
1386         }
1387
1388 /* For the next 2 functions, SSL_clear() sets shutdown and so
1389  * one of these calls will reset it */
1390 void SSL_set_accept_state(SSL *s)
1391         {
1392         s->server=1;
1393         s->shutdown=0;
1394         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1395         s->handshake_func=s->method->ssl_accept;
1396         /* clear the current cipher */
1397         ssl_clear_cipher_ctx(s);
1398         }
1399
1400 void SSL_set_connect_state(SSL *s)
1401         {
1402         s->server=0;
1403         s->shutdown=0;
1404         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1405         s->handshake_func=s->method->ssl_connect;
1406         /* clear the current cipher */
1407         ssl_clear_cipher_ctx(s);
1408         }
1409
1410 int ssl_undefined_function(SSL *s)
1411         {
1412         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1413         return(0);
1414         }
1415
1416 SSL_METHOD *ssl_bad_method(int ver)
1417         {
1418         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1419         return(NULL);
1420         }
1421
1422 char *SSL_get_version(SSL *s)
1423         {
1424         if (s->version == TLS1_VERSION)
1425                 return("TLSv1");
1426         else if (s->version == SSL3_VERSION)
1427                 return("SSLv3");
1428         else if (s->version == SSL2_VERSION)
1429                 return("SSLv2");
1430         else
1431                 return("unknown");
1432         }
1433
1434 SSL *SSL_dup(SSL *s)
1435         {
1436         STACK_OF(X509_NAME) *sk;
1437         X509_NAME *xn;
1438         SSL *ret;
1439         int i;
1440
1441         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1442             return(NULL);
1443
1444         /* This copies version, session-id, SSL_METHOD and 'cert' */
1445         SSL_copy_session_id(ret,s);
1446
1447         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1448         SSL_set_verify(ret,SSL_get_verify_mode(s),
1449                 SSL_get_verify_callback(s));
1450
1451         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1452
1453         ret->debug=s->debug;
1454         ret->options=s->options;
1455
1456         /* copy app data, a little dangerous perhaps */
1457         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1458                 goto err;
1459
1460         /* setup rbio, and wbio */
1461         if (s->rbio != NULL)
1462                 {
1463                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1464                         goto err;
1465                 }
1466         if (s->wbio != NULL)
1467                 {
1468                 if (s->wbio != s->rbio)
1469                         {
1470                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1471                                 goto err;
1472                         }
1473                 else
1474                         ret->wbio=ret->rbio;
1475                 }
1476
1477         /* dup the cipher_list and cipher_list_by_id stacks */
1478         if (s->cipher_list != NULL)
1479                 {
1480                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1481                         goto err;
1482                 }
1483         if (s->cipher_list_by_id != NULL)
1484                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1485                         == NULL)
1486                         goto err;
1487
1488         /* Dup the client_CA list */
1489         if (s->client_CA != NULL)
1490                 {
1491                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1492                 ret->client_CA=sk;
1493                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1494                         {
1495                         xn=sk_X509_NAME_value(sk,i);
1496                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1497                                 {
1498                                 X509_NAME_free(xn);
1499                                 goto err;
1500                                 }
1501                         }
1502                 }
1503
1504         ret->shutdown=s->shutdown;
1505         ret->state=s->state;
1506         ret->handshake_func=s->handshake_func;
1507         ret->server=s->server;
1508
1509         if (0)
1510                 {
1511 err:
1512                 if (ret != NULL) SSL_free(ret);
1513                 ret=NULL;
1514                 }
1515         return(ret);
1516         }
1517
1518 void ssl_clear_cipher_ctx(SSL *s)
1519         {
1520         if (s->enc_read_ctx != NULL)
1521                 {
1522                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1523                 Free(s->enc_read_ctx);
1524                 s->enc_read_ctx=NULL;
1525                 }
1526         if (s->enc_write_ctx != NULL)
1527                 {
1528                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1529                 Free(s->enc_write_ctx);
1530                 s->enc_write_ctx=NULL;
1531                 }
1532         if (s->expand != NULL)
1533                 {
1534                 COMP_CTX_free(s->expand);
1535                 s->expand=NULL;
1536                 }
1537         if (s->compress != NULL)
1538                 {
1539                 COMP_CTX_free(s->compress);
1540                 s->compress=NULL;
1541                 }
1542         }
1543
1544 /* Fix this function so that it takes an optional type parameter */
1545 X509 *SSL_get_certificate(SSL *s)
1546         {
1547         if (s->cert != NULL)
1548                 return(s->cert->key->x509);
1549         else
1550                 return(NULL);
1551         }
1552
1553 /* Fix this function so that it takes an optional type parameter */
1554 EVP_PKEY *SSL_get_privatekey(SSL *s)
1555         {
1556         if (s->cert != NULL)
1557                 return(s->cert->key->privatekey);
1558         else
1559                 return(NULL);
1560         }
1561
1562 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1563         {
1564         if ((s->session != NULL) && (s->session->cipher != NULL))
1565                 return(s->session->cipher);
1566         return(NULL);
1567         }
1568
1569 int ssl_init_wbio_buffer(SSL *s,int push)
1570         {
1571         BIO *bbio;
1572
1573         if (s->bbio == NULL)
1574                 {
1575                 bbio=BIO_new(BIO_f_buffer());
1576                 if (bbio == NULL) return(0);
1577                 s->bbio=bbio;
1578                 }
1579         else
1580                 {
1581                 bbio=s->bbio;
1582                 if (s->bbio == s->wbio)
1583                         s->wbio=BIO_pop(s->wbio);
1584                 }
1585         BIO_reset(bbio);
1586 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1587         if (!BIO_set_read_buffer_size(bbio,1))
1588                 {
1589                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1590                 return(0);
1591                 }
1592         if (push)
1593                 {
1594                 if (s->wbio != bbio)
1595                         s->wbio=BIO_push(bbio,s->wbio);
1596                 }
1597         else
1598                 {
1599                 if (s->wbio == bbio)
1600                         s->wbio=BIO_pop(bbio);
1601                 }
1602         return(1);
1603         }
1604
1605 void ssl_free_wbio_buffer(SSL *s)
1606         {
1607         BIO *under;
1608
1609         if (s->bbio == NULL) return;
1610
1611         if (s->bbio == s->wbio)
1612                 {
1613                 /* remove buffering */
1614                 under=BIO_pop(s->wbio);
1615                 if (under != NULL)
1616                         s->wbio=under;
1617                 else
1618                         abort(); /* ok */
1619                 }
1620         BIO_free(s->bbio);
1621         s->bbio=NULL;
1622         }
1623
1624 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1625         {
1626         ctx->quiet_shutdown=mode;
1627         }
1628
1629 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1630         {
1631         return(ctx->quiet_shutdown);
1632         }
1633
1634 void SSL_set_quiet_shutdown(SSL *s,int mode)
1635         {
1636         s->quiet_shutdown=mode;
1637         }
1638
1639 int SSL_get_quiet_shutdown(SSL *s)
1640         {
1641         return(s->quiet_shutdown);
1642         }
1643
1644 void SSL_set_shutdown(SSL *s,int mode)
1645         {
1646         s->shutdown=mode;
1647         }
1648
1649 int SSL_get_shutdown(SSL *s)
1650         {
1651         return(s->shutdown);
1652         }
1653
1654 int SSL_version(SSL *s)
1655         {
1656         return(s->version);
1657         }
1658
1659 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1660         {
1661         return(ssl->ctx);
1662         }
1663
1664 #ifndef NO_STDIO
1665 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1666         {
1667         return(X509_STORE_set_default_paths(ctx->cert_store));
1668         }
1669
1670 int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
1671         {
1672         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1673         }
1674 #endif
1675
1676 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1677         {
1678         ssl->info_callback=cb;
1679         }
1680
1681 void (*SSL_get_info_callback(SSL *ssl))(void)
1682         {
1683         return((void (*)())ssl->info_callback);
1684         }
1685
1686 int SSL_state(SSL *ssl)
1687         {
1688         return(ssl->state);
1689         }
1690
1691 void SSL_set_verify_result(SSL *ssl,long arg)
1692         {
1693         ssl->verify_result=arg;
1694         }
1695
1696 long SSL_get_verify_result(SSL *ssl)
1697         {
1698         return(ssl->verify_result);
1699         }
1700
1701 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1702                          int (*dup_func)(),void (*free_func)())
1703         {
1704         ssl_meth_num++;
1705         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1706                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1707         }
1708
1709 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1710         {
1711         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1712         }
1713
1714 void *SSL_get_ex_data(SSL *s,int idx)
1715         {
1716         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1717         }
1718
1719 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1720                              int (*dup_func)(),void (*free_func)())
1721         {
1722         ssl_ctx_meth_num++;
1723         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1724                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1725         }
1726
1727 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1728         {
1729         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1730         }
1731
1732 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1733         {
1734         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1735         }
1736
1737 int ssl_ok(SSL *s)
1738         {
1739         return(1);
1740         }
1741
1742 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1743         {
1744         return(ctx->cert_store);
1745         }
1746
1747 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1748         {
1749         if (ctx->cert_store != NULL)
1750                 X509_STORE_free(ctx->cert_store);
1751         ctx->cert_store=store;
1752         }
1753
1754 int SSL_want(SSL *s)
1755         {
1756         return(s->rwstate);
1757         }
1758
1759 /*!
1760  * \brief Set the callback for generating temporary RSA keys.
1761  * \param ctx the SSL context.
1762  * \param cb the callback
1763  */
1764
1765 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1766                                                           int keylength))
1767     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1768
1769 #ifdef DOXYGEN
1770 /*!
1771  * \brief The RSA temporary key callback function.
1772  * \param ssl the SSL session.
1773  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1774  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1775  * the required key in bits.
1776  * \return the temporary RSA key.
1777  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1778  */
1779
1780 RSA *cb(SSL *ssl,int export,int keylength)
1781     {}
1782 #endif
1783
1784 /*!
1785  * \brief Set the callback for generating temporary DH keys.
1786  * \param ctx the SSL context.
1787  * \param dh the callback
1788  */
1789
1790 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1791                                                         int keylength))
1792     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1793
1794 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1795                                                           int keylength))
1796     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1797
1798 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1799                                                         int keylength))
1800     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1801
1802 #if defined(_WINDLL) && defined(WIN16)
1803 #include "../crypto/bio/bss_file.c"
1804 #endif
1805
1806 IMPLEMENT_STACK_OF(SSL_CIPHER)
1807 IMPLEMENT_STACK_OF(SSL_COMP)