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 <openssl/objects.h>
  63 #include <openssl/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->sid_ctx_length=ctx->sid_ctx_length;
 190         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 191         s->verify_mode=ctx->verify_mode;
 192         s->verify_depth=ctx->verify_depth;
 193         s->verify_callback=ctx->default_verify_callback;
 194         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 195         s->ctx=ctx;
 196
 197         s->verify_result=X509_V_OK;
 198
 199         s->method=ctx->method;
 200
 201         if (!s->method->ssl_new(s))
 202                 {
 203                 SSL_CTX_free(ctx);
 204                 Free(s);
 205                 goto err;
 206                 }
 207
 208         s->quiet_shutdown=ctx->quiet_shutdown;
 209         s->references=1;
 210         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 211         s->options=ctx->options;
 212         SSL_clear(s);
 213
 214         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
 215
 216         return(s);
 217 err:
 218         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 219         return(NULL);
 220         }
 221
 222 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 223                                    unsigned int sid_ctx_len)
 224     {
 225     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 226         {
 227         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 228         return 0;
 229         }
 230     ctx->sid_ctx_length=sid_ctx_len;
 231     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 232
 233     return 1;
 234     }
 235
 236 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 237                                unsigned int sid_ctx_len)
 238     {
 239     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 240         {
 241         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 242         return 0;
 243         }
 244     ssl->sid_ctx_length=sid_ctx_len;
 245     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 246
 247     return 1;
 248     }
 249
 250 void SSL_free(SSL *s)
 251         {
 252         int i;
 253
 254         if(s == NULL)
 255             return;
 256
 257         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 258 #ifdef REF_PRINT
 259         REF_PRINT("SSL",s);
 260 #endif
 261         if (i > 0) return;
 262 #ifdef REF_CHECK
 263         if (i < 0)
 264                 {
 265                 fprintf(stderr,"SSL_free, bad reference count\n");
 266                 abort(); /* ok */
 267                 }
 268 #endif
 269
 270         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 271
 272         if (s->bbio != NULL)
 273                 {
 274                 /* If the buffering BIO is in place, pop it off */
 275                 if (s->bbio == s->wbio)
 276                         {
 277                         s->wbio=BIO_pop(s->wbio);
 278                         }
 279                 BIO_free(s->bbio);
 280                 s->bbio=NULL;
 281                 }
 282         if (s->rbio != NULL)
 283                 BIO_free_all(s->rbio);
 284         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 285                 BIO_free_all(s->wbio);
 286
 287         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 288
 289         /* add extra stuff */
 290         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 291         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 292
 293         /* Make the next call work :-) */
 294         if (s->session != NULL)
 295                 {
 296                 ssl_clear_bad_session(s);
 297                 SSL_SESSION_free(s->session);
 298                 }
 299
 300         ssl_clear_cipher_ctx(s);
 301
 302         if (s->cert != NULL) ssl_cert_free(s->cert);
 303         /* Free up if allocated */
 304
 305         if (s->ctx) SSL_CTX_free(s->ctx);
 306
 307         if (s->client_CA != NULL)
 308                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 309
 310         if (s->method != NULL) s->method->ssl_free(s);
 311
 312         Free((char *)s);
 313         }
 314
 315 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 316         {
 317         /* If the output buffering BIO is still in place, remove it
 318          */
 319         if (s->bbio != NULL)
 320                 {
 321                 if (s->wbio == s->bbio)
 322                         {
 323                         s->wbio=s->wbio->next_bio;
 324                         s->bbio->next_bio=NULL;
 325                         }
 326                 }
 327         if ((s->rbio != NULL) && (s->rbio != rbio))
 328                 BIO_free_all(s->rbio);
 329         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 330                 BIO_free_all(s->wbio);
 331         s->rbio=rbio;
 332         s->wbio=wbio;
 333         }
 334
 335 BIO *SSL_get_rbio(SSL *s)
 336         { return(s->rbio); }
 337
 338 BIO *SSL_get_wbio(SSL *s)
 339         { return(s->wbio); }
 340
 341 int SSL_get_fd(SSL *s)
 342         {
 343         int ret= -1;
 344         BIO *b,*r;
 345
 346         b=SSL_get_rbio(s);
 347         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 348         if (r != NULL)
 349                 BIO_get_fd(r,&ret);
 350         return(ret);
 351         }
 352
 353 #ifndef NO_SOCK
 354 int SSL_set_fd(SSL *s,int fd)
 355         {
 356         int ret=0;
 357         BIO *bio=NULL;
 358
 359         bio=BIO_new(BIO_s_socket());
 360
 361         if (bio == NULL)
 362                 {
 363                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 364                 goto err;
 365                 }
 366         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 367         SSL_set_bio(s,bio,bio);
 368         ret=1;
 369 err:
 370         return(ret);
 371         }
 372
 373 int SSL_set_wfd(SSL *s,int fd)
 374         {
 375         int ret=0;
 376         BIO *bio=NULL;
 377
 378         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 379                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 380                 {
 381                 bio=BIO_new(BIO_s_socket());
 382
 383                 if (bio == NULL)
 384                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 385                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 386                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 387                 }
 388         else
 389                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 390         ret=1;
 391 err:
 392         return(ret);
 393         }
 394
 395 int SSL_set_rfd(SSL *s,int fd)
 396         {
 397         int ret=0;
 398         BIO *bio=NULL;
 399
 400         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 401                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 402                 {
 403                 bio=BIO_new(BIO_s_socket());
 404
 405                 if (bio == NULL)
 406                         {
 407                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 408                         goto err;
 409                         }
 410                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 411                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 412                 }
 413         else
 414                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 415         ret=1;
 416 err:
 417         return(ret);
 418         }
 419 #endif
 420
 421 int SSL_get_verify_mode(SSL *s)
 422         {
 423         return(s->verify_mode);
 424         }
 425
 426 int SSL_get_verify_depth(SSL *s)
 427         {
 428         return(s->verify_depth);
 429         }
 430
 431 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
 432         {
 433         return(s->verify_callback);
 434         }
 435
 436 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
 437         {
 438         return(ctx->verify_mode);
 439         }
 440
 441 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
 442         {
 443         return(ctx->verify_depth);
 444         }
 445
 446 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
 447         {
 448         return(ctx->default_verify_callback);
 449         }
 450
 451 void SSL_set_verify(SSL *s,int mode,
 452                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 453         {
 454         s->verify_mode=mode;
 455         if (callback != NULL)
 456                 s->verify_callback=callback;
 457         }
 458
 459 void SSL_set_verify_depth(SSL *s,int depth)
 460         {
 461         s->verify_depth=depth;
 462         }
 463
 464 void SSL_set_read_ahead(SSL *s,int yes)
 465         {
 466         s->read_ahead=yes;
 467         }
 468
 469 int SSL_get_read_ahead(SSL *s)
 470         {
 471         return(s->read_ahead);
 472         }
 473
 474 int SSL_pending(SSL *s)
 475         {
 476         return(s->method->ssl_pending(s));
 477         }
 478
 479 X509 *SSL_get_peer_certificate(SSL *s)
 480         {
 481         X509 *r;
 482
 483         if ((s == NULL) || (s->session == NULL))
 484                 r=NULL;
 485         else
 486                 r=s->session->peer;
 487
 488         if (r == NULL) return(r);
 489
 490         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 491
 492         return(r);
 493         }
 494
 495 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
 496         {
 497         STACK_OF(X509) *r;
 498
 499         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
 500                 r=NULL;
 501         else
 502                 r=s->session->cert->cert_chain;
 503
 504         return(r);
 505         }
 506
 507 /* Now in theory, since the calling process own 't' it should be safe to
 508  * modify.  We need to be able to read f without being hassled */
 509 void SSL_copy_session_id(SSL *t,SSL *f)
 510         {
 511         CERT *tmp;
 512
 513         /* Do we need to to SSL locking? */
 514         SSL_set_session(t,SSL_get_session(f));
 515
 516         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 517          * vice-versa */
 518         if (t->method != f->method)
 519                 {
 520                 t->method->ssl_free(t); /* cleanup current */
 521                 t->method=f->method;    /* change method */
 522                 t->method->ssl_new(t);  /* setup new */
 523                 }
 524
 525         tmp=t->cert;
 526         if (f->cert != NULL)
 527                 {
 528                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 529                 t->cert=f->cert;
 530                 }
 531         else
 532                 t->cert=NULL;
 533         if (tmp != NULL) ssl_cert_free(tmp);
 534         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 535         }
 536
 537 /* Fix this so it checks all the valid key/cert options */
 538 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 539         {
 540         if (    (ctx == NULL) ||
 541                 (ctx->default_cert == NULL) ||
 542                 (ctx->default_cert->key->x509 == NULL))
 543                 {
 544                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 545                 return(0);
 546                 }
 547         if      (ctx->default_cert->key->privatekey == NULL)
 548                 {
 549                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 550                 return(0);
 551                 }
 552         return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
 553         }
 554
 555 /* Fix this function so that it takes an optional type parameter */
 556 int SSL_check_private_key(SSL *ssl)
 557         {
 558         if (ssl == NULL)
 559                 {
 560                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 561                 return(0);
 562                 }
 563         if (ssl->cert == NULL)
 564                 return(SSL_CTX_check_private_key(ssl->ctx));
 565         if (ssl->cert->key->x509 == NULL)
 566                 {
 567                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 568                 return(0);
 569                 }
 570         if (ssl->cert->key->privatekey == NULL)
 571                 {
 572                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 573                 return(0);
 574                 }
 575         return(X509_check_private_key(ssl->cert->key->x509,
 576                 ssl->cert->key->privatekey));
 577         }
 578
 579 int SSL_accept(SSL *s)
 580         {
 581         return(s->method->ssl_accept(s));
 582         }
 583
 584 int SSL_connect(SSL *s)
 585         {
 586         return(s->method->ssl_connect(s));
 587         }
 588
 589 long SSL_get_default_timeout(SSL *s)
 590         {
 591         return(s->method->get_timeout());
 592         }
 593
 594 int SSL_read(SSL *s,char *buf,int num)
 595         {
 596         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 597                 {
 598                 s->rwstate=SSL_NOTHING;
 599                 return(0);
 600                 }
 601         return(s->method->ssl_read(s,buf,num));
 602         }
 603
 604 int SSL_peek(SSL *s,char *buf,int num)
 605         {
 606         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 607                 {
 608                 return(0);
 609                 }
 610         return(s->method->ssl_peek(s,buf,num));
 611         }
 612
 613 int SSL_write(SSL *s,const char *buf,int num)
 614         {
 615         if (s->shutdown & SSL_SENT_SHUTDOWN)
 616                 {
 617                 s->rwstate=SSL_NOTHING;
 618                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 619                 return(-1);
 620                 }
 621         return(s->method->ssl_write(s,buf,num));
 622         }
 623
 624 int SSL_shutdown(SSL *s)
 625         {
 626         if ((s != NULL) && !SSL_in_init(s))
 627                 return(s->method->ssl_shutdown(s));
 628         else
 629                 return(1);
 630         }
 631
 632 int SSL_renegotiate(SSL *s)
 633         {
 634         s->new_session=1;
 635         return(s->method->ssl_renegotiate(s));
 636         }
 637
 638 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 639         {
 640         long l;
 641
 642         switch (cmd)
 643                 {
 644         case SSL_CTRL_GET_READ_AHEAD:
 645                 return(s->read_ahead);
 646         case SSL_CTRL_SET_READ_AHEAD:
 647                 l=s->read_ahead;
 648                 s->read_ahead=larg;
 649                 return(l);
 650         case SSL_CTRL_OPTIONS:
 651                 return(s->options|=larg);
 652         default:
 653                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 654                 }
 655         return(0);
 656         }
 657
 658 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 659         {
 660         long l;
 661
 662         switch (cmd)
 663                 {
 664         case SSL_CTRL_GET_READ_AHEAD:
 665                 return(ctx->read_ahead);
 666         case SSL_CTRL_SET_READ_AHEAD:
 667                 l=ctx->read_ahead;
 668                 ctx->read_ahead=larg;
 669                 return(l);
 670
 671         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 672                 l=ctx->session_cache_size;
 673                 ctx->session_cache_size=larg;
 674                 return(l);
 675         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 676                 return(ctx->session_cache_size);
 677         case SSL_CTRL_SET_SESS_CACHE_MODE:
 678                 l=ctx->session_cache_mode;
 679                 ctx->session_cache_mode=larg;
 680                 return(l);
 681         case SSL_CTRL_GET_SESS_CACHE_MODE:
 682                 return(ctx->session_cache_mode);
 683
 684         case SSL_CTRL_SESS_NUMBER:
 685                 return(ctx->sessions->num_items);
 686         case SSL_CTRL_SESS_CONNECT:
 687                 return(ctx->stats.sess_connect);
 688         case SSL_CTRL_SESS_CONNECT_GOOD:
 689                 return(ctx->stats.sess_connect_good);
 690         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 691                 return(ctx->stats.sess_connect_renegotiate);
 692         case SSL_CTRL_SESS_ACCEPT:
 693                 return(ctx->stats.sess_accept);
 694         case SSL_CTRL_SESS_ACCEPT_GOOD:
 695                 return(ctx->stats.sess_accept_good);
 696         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 697                 return(ctx->stats.sess_accept_renegotiate);
 698         case SSL_CTRL_SESS_HIT:
 699                 return(ctx->stats.sess_hit);
 700         case SSL_CTRL_SESS_CB_HIT:
 701                 return(ctx->stats.sess_cb_hit);
 702         case SSL_CTRL_SESS_MISSES:
 703                 return(ctx->stats.sess_miss);
 704         case SSL_CTRL_SESS_TIMEOUTS:
 705                 return(ctx->stats.sess_timeout);
 706         case SSL_CTRL_SESS_CACHE_FULL:
 707                 return(ctx->stats.sess_cache_full);
 708         case SSL_CTRL_OPTIONS:
 709                 return(ctx->options|=larg);
 710         default:
 711                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 712                 }
 713         return(0);
 714         }
 715
 716 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 717         {
 718         long l;
 719
 720         l=a->id-b->id;
 721         if (l == 0L)
 722                 return(0);
 723         else
 724                 return((l > 0)?1:-1);
 725         }
 726
 727 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 728         {
 729         long l;
 730
 731         l=(*ap)->id-(*bp)->id;
 732         if (l == 0L)
 733                 return(0);
 734         else
 735                 return((l > 0)?1:-1);
 736         }
 737
 738 /** return a STACK of the ciphers available for the SSL and in order of
 739  * preference */
 740 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 741         {
 742         if ((s != NULL) && (s->cipher_list != NULL))
 743                 {
 744                 return(s->cipher_list);
 745                 }
 746         else if ((s->ctx != NULL) &&
 747                 (s->ctx->cipher_list != NULL))
 748                 {
 749                 return(s->ctx->cipher_list);
 750                 }
 751         return(NULL);
 752         }
 753
 754 /** return a STACK of the ciphers available for the SSL and in order of
 755  * algorithm id */
 756 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 757         {
 758         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 759                 {
 760                 return(s->cipher_list_by_id);
 761                 }
 762         else if ((s != NULL) && (s->ctx != NULL) &&
 763                 (s->ctx->cipher_list_by_id != NULL))
 764                 {
 765                 return(s->ctx->cipher_list_by_id);
 766                 }
 767         return(NULL);
 768         }
 769
 770 /** The old interface to get the same thing as SSL_get_ciphers() */
 771 const char *SSL_get_cipher_list(SSL *s,int n)
 772         {
 773         SSL_CIPHER *c;
 774         STACK_OF(SSL_CIPHER) *sk;
 775
 776         if (s == NULL) return(NULL);
 777         sk=SSL_get_ciphers(s);
 778         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 779                 return(NULL);
 780         c=sk_SSL_CIPHER_value(sk,n);
 781         if (c == NULL) return(NULL);
 782         return(c->name);
 783         }
 784
 785 /** specify the ciphers to be used by defaut by the SSL_CTX */
 786 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 787         {
 788         STACK_OF(SSL_CIPHER) *sk;
 789
 790         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 791                 &ctx->cipher_list_by_id,str);
 792 /* XXXX */
 793         return((sk == NULL)?0:1);
 794         }
 795
 796 /** specify the ciphers to be used by the SSL */
 797 int SSL_set_cipher_list(SSL *s,char *str)
 798         {
 799         STACK_OF(SSL_CIPHER) *sk;
 800
 801         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 802                 &s->cipher_list_by_id,str);
 803 /* XXXX */
 804         return((sk == NULL)?0:1);
 805         }
 806
 807 /* works well for SSLv2, not so good for SSLv3 */
 808 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 809         {
 810         char *p;
 811         const char *cp;
 812         STACK_OF(SSL_CIPHER) *sk;
 813         SSL_CIPHER *c;
 814         int i;
 815
 816         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 817                 (len < 2))
 818                 return(NULL);
 819
 820         p=buf;
 821         sk=s->session->ciphers;
 822         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 823                 {
 824                 /* Decrement for either the ':' or a '\0' */
 825                 len--;
 826                 c=sk_SSL_CIPHER_value(sk,i);
 827                 for (cp=c->name; *cp; )
 828                         {
 829                         if (len-- == 0)
 830                                 {
 831                                 *p='\0';
 832                                 return(buf);
 833                                 }
 834                         else
 835                                 *(p++)= *(cp++);
 836                         }
 837                 *(p++)=':';
 838                 }
 839         p[-1]='\0';
 840         return(buf);
 841         }
 842
 843 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
 844         {
 845         int i,j=0;
 846         SSL_CIPHER *c;
 847         unsigned char *q;
 848
 849         if (sk == NULL) return(0);
 850         q=p;
 851
 852         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 853                 {
 854                 c=sk_SSL_CIPHER_value(sk,i);
 855                 j=ssl_put_cipher_by_char(s,c,p);
 856                 p+=j;
 857                 }
 858         return(p-q);
 859         }
 860
 861 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 862                                                STACK_OF(SSL_CIPHER) **skp)
 863         {
 864         SSL_CIPHER *c;
 865         STACK_OF(SSL_CIPHER) *sk;
 866         int i,n;
 867
 868         n=ssl_put_cipher_by_char(s,NULL,NULL);
 869         if ((num%n) != 0)
 870                 {
 871                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 872                 return(NULL);
 873                 }
 874         if ((skp == NULL) || (*skp == NULL))
 875                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
 876         else
 877                 {
 878                 sk= *skp;
 879                 sk_SSL_CIPHER_zero(sk);
 880                 }
 881
 882         for (i=0; i<num; i+=n)
 883                 {
 884                 c=ssl_get_cipher_by_char(s,p);
 885                 p+=n;
 886                 if (c != NULL)
 887                         {
 888                         if (!sk_SSL_CIPHER_push(sk,c))
 889                                 {
 890                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 891                                 goto err;
 892                                 }
 893                         }
 894                 }
 895
 896         if (skp != NULL)
 897                 *skp=sk;
 898         return(sk);
 899 err:
 900         if ((skp == NULL) || (*skp == NULL))
 901                 sk_SSL_CIPHER_free(sk);
 902         return(NULL);
 903         }
 904
 905 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 906         {
 907         unsigned long l;
 908
 909         l=(unsigned long)
 910                 ((unsigned int) a->session_id[0]     )|
 911                 ((unsigned int) a->session_id[1]<< 8L)|
 912                 ((unsigned long)a->session_id[2]<<16L)|
 913                 ((unsigned long)a->session_id[3]<<24L);
 914         return(l);
 915         }
 916
 917 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 918         {
 919         if (a->ssl_version != b->ssl_version)
 920                 return(1);
 921         if (a->session_id_length != b->session_id_length)
 922                 return(1);
 923         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 924         }
 925
 926 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 927         {
 928         SSL_CTX *ret=NULL;
 929
 930         if (meth == NULL)
 931                 {
 932                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 933                 return(NULL);
 934                 }
 935
 936         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 937                 {
 938                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 939                 goto err;
 940                 }
 941         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 942         if (ret == NULL)
 943                 goto err;
 944
 945         memset(ret,0,sizeof(SSL_CTX));
 946
 947         ret->method=meth;
 948
 949         ret->cert_store=NULL;
 950         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 951         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 952         ret->session_cache_head=NULL;
 953         ret->session_cache_tail=NULL;
 954
 955         /* We take the system default */
 956         ret->session_timeout=meth->get_timeout();
 957
 958         ret->new_session_cb=NULL;
 959         ret->remove_session_cb=NULL;
 960         ret->get_session_cb=NULL;
 961
 962         memset((char *)&ret->stats,0,sizeof(ret->stats));
 963
 964         ret->references=1;
 965         ret->quiet_shutdown=0;
 966
 967 /*      ret->cipher=NULL;*/
 968 /*      ret->s2->challenge=NULL;
 969         ret->master_key=NULL;
 970         ret->key_arg=NULL;
 971         ret->s2->conn_id=NULL; */
 972
 973         ret->info_callback=NULL;
 974
 975         ret->app_verify_callback=NULL;
 976         ret->app_verify_arg=NULL;
 977
 978         ret->read_ahead=0;
 979         ret->verify_mode=SSL_VERIFY_NONE;
 980         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
 981         ret->default_verify_callback=NULL;
 982         if ((ret->default_cert=ssl_cert_new()) == NULL)
 983                 goto err;
 984
 985         ret->default_passwd_callback=NULL;
 986         ret->client_cert_cb=NULL;
 987
 988         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
 989         if (ret->sessions == NULL) goto err;
 990         ret->cert_store=X509_STORE_new();
 991         if (ret->cert_store == NULL) goto err;
 992
 993         ssl_create_cipher_list(ret->method,
 994                 &ret->cipher_list,&ret->cipher_list_by_id,
 995                 SSL_DEFAULT_CIPHER_LIST);
 996         if (ret->cipher_list == NULL
 997             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
 998                 {
 999                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1000                 goto err2;
1001                 }
1002
1003         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1004                 {
1005                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1006                 goto err2;
1007                 }
1008         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1009                 {
1010                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1011                 goto err2;
1012                 }
1013         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1014                 {
1015                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1016                 goto err2;
1017                 }
1018
1019         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1020                 goto err;
1021
1022         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1023
1024         ret->extra_certs=NULL;
1025         ret->comp_methods=SSL_COMP_get_compression_methods();
1026
1027         return(ret);
1028 err:
1029         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1030 err2:
1031         if (ret != NULL) SSL_CTX_free(ret);
1032         return(NULL);
1033         }
1034
1035 static void SSL_COMP_free(SSL_COMP *comp)
1036     { Free(comp); }
1037
1038 void SSL_CTX_free(SSL_CTX *a)
1039         {
1040         int i;
1041
1042         if (a == NULL) return;
1043
1044         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1045 #ifdef REF_PRINT
1046         REF_PRINT("SSL_CTX",a);
1047 #endif
1048         if (i > 0) return;
1049 #ifdef REF_CHECK
1050         if (i < 0)
1051                 {
1052                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1053                 abort(); /* ok */
1054                 }
1055 #endif
1056         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1057
1058         if (a->sessions != NULL)
1059                 {
1060                 SSL_CTX_flush_sessions(a,0);
1061                 lh_free(a->sessions);
1062                 }
1063         if (a->cert_store != NULL)
1064                 X509_STORE_free(a->cert_store);
1065         if (a->cipher_list != NULL)
1066                 sk_SSL_CIPHER_free(a->cipher_list);
1067         if (a->cipher_list_by_id != NULL)
1068                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1069         if (a->default_cert != NULL)
1070                 ssl_cert_free(a->default_cert);
1071         if (a->client_CA != NULL)
1072                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1073         if (a->extra_certs != NULL)
1074                 sk_X509_pop_free(a->extra_certs,X509_free);
1075         if (a->comp_methods != NULL)
1076                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1077         Free((char *)a);
1078         }
1079
1080 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1081         {
1082         ctx->default_passwd_callback=cb;
1083         }
1084
1085 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1086         {
1087         ctx->app_verify_callback=cb;
1088         ctx->app_verify_arg=arg;
1089         }
1090
1091 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1092         {
1093         ctx->verify_mode=mode;
1094         ctx->default_verify_callback=cb;
1095         /* This needs cleaning up EAY EAY EAY */
1096         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1097         }
1098
1099 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1100         {
1101         ctx->verify_depth=depth;
1102         }
1103
1104 /* Need default_cert to check for callbacks, for now (see comment in CERT
1105    strucure)
1106 */
1107 void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
1108         {
1109         CERT_PKEY *cpk;
1110         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1111         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1112         int rsa_tmp_export,dh_tmp_export,kl;
1113         unsigned long mask,emask;
1114
1115         if (c == NULL) return;
1116
1117         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1118
1119 #ifndef NO_RSA
1120         rsa_tmp=(c->rsa_tmp != NULL || default_cert->rsa_tmp_cb != NULL);
1121         rsa_tmp_export=(default_cert->rsa_tmp_cb != NULL ||
1122                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1123 #else
1124         rsa_tmp=rsa_tmp_export=0;
1125 #endif
1126 #ifndef NO_DH
1127         dh_tmp=(c->dh_tmp != NULL || default_cert->dh_tmp_cb != NULL);
1128         dh_tmp_export=(default_cert->dh_tmp_cb != NULL ||
1129                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1130 #else
1131         dh_tmp=dh_tmp_export=0;
1132 #endif
1133
1134         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1135         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1136         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1137         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1138         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1139         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1140         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1141         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1142         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1143         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1144         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1145 /* FIX THIS EAY EAY EAY */
1146         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1147         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1148
1149         mask=0;
1150         emask=0;
1151
1152 #ifdef CIPHER_DEBUG
1153         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1154                 rsa_tmp,rsa_tmp_export,dh_tmp,
1155                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1156 #endif
1157
1158         if (rsa_enc || (rsa_tmp && rsa_sign))
1159                 mask|=SSL_kRSA;
1160         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1161                 emask|=SSL_kRSA;
1162
1163 #if 0
1164         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1165         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1166                 (rsa_enc || rsa_sign || dsa_sign))
1167                 mask|=SSL_kEDH;
1168         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1169                 (rsa_enc || rsa_sign || dsa_sign))
1170                 emask|=SSL_kEDH;
1171 #endif
1172
1173         if (dh_tmp_export)
1174                 emask|=SSL_kEDH;
1175
1176         if (dh_tmp)
1177                 mask|=SSL_kEDH;
1178
1179         if (dh_rsa) mask|=SSL_kDHr;
1180         if (dh_rsa_export) emask|=SSL_kDHr;
1181
1182         if (dh_dsa) mask|=SSL_kDHd;
1183         if (dh_dsa_export) emask|=SSL_kDHd;
1184
1185         if (rsa_enc || rsa_sign)
1186                 {
1187                 mask|=SSL_aRSA;
1188                 emask|=SSL_aRSA;
1189                 }
1190
1191         if (dsa_sign)
1192                 {
1193                 mask|=SSL_aDSS;
1194                 emask|=SSL_aDSS;
1195                 }
1196
1197 #ifdef SSL_ALLOW_ADH
1198         mask|=SSL_aNULL;
1199         emask|=SSL_aNULL;
1200 #endif
1201
1202         c->mask=mask;
1203         c->export_mask=emask;
1204         c->valid=1;
1205         }
1206
1207 /* THIS NEEDS CLEANING UP */
1208 X509 *ssl_get_server_send_cert(SSL *s)
1209         {
1210         unsigned long alg,mask,kalg;
1211         CERT *c;
1212         int i,export;
1213
1214         c=s->cert;
1215         ssl_set_cert_masks(c,s->ctx->default_cert,s->s3->tmp.new_cipher);
1216         alg=s->s3->tmp.new_cipher->algorithms;
1217         export=SSL_IS_EXPORT(alg);
1218         mask=export?c->export_mask:c->mask;
1219         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1220
1221         if      (kalg & SSL_kDHr)
1222                 i=SSL_PKEY_DH_RSA;
1223         else if (kalg & SSL_kDHd)
1224                 i=SSL_PKEY_DH_DSA;
1225         else if (kalg & SSL_aDSS)
1226                 i=SSL_PKEY_DSA_SIGN;
1227         else if (kalg & SSL_aRSA)
1228                 {
1229                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1230                         i=SSL_PKEY_RSA_SIGN;
1231                 else
1232                         i=SSL_PKEY_RSA_ENC;
1233                 }
1234         else /* if (kalg & SSL_aNULL) */
1235                 {
1236                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1237                 return(NULL);
1238                 }
1239         if (c->pkeys[i].x509 == NULL) return(NULL);
1240         return(c->pkeys[i].x509);
1241         }
1242
1243 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1244         {
1245         unsigned long alg;
1246         CERT *c;
1247
1248         alg=cipher->algorithms;
1249         c=s->cert;
1250
1251         if ((alg & SSL_aDSS) &&
1252                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1253                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1254         else if (alg & SSL_aRSA)
1255                 {
1256                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1257                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1258                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1259                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1260                 else
1261                         return(NULL);
1262                 }
1263         else /* if (alg & SSL_aNULL) */
1264                 {
1265                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1266                 return(NULL);
1267                 }
1268         }
1269
1270 void ssl_update_cache(SSL *s,int mode)
1271         {
1272         int i;
1273
1274         /* If the session_id_length is 0, we are not supposed to cache it,
1275          * and it would be rather hard to do anyway :-) */
1276         if (s->session->session_id_length == 0) return;
1277
1278         if ((s->ctx->session_cache_mode & mode)
1279                 && (!s->hit)
1280                 && SSL_CTX_add_session(s->ctx,s->session)
1281                 && (s->ctx->new_session_cb != NULL))
1282                 {
1283                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1284                 if (!s->ctx->new_session_cb(s,s->session))
1285                         SSL_SESSION_free(s->session);
1286                 }
1287
1288         /* auto flush every 255 connections */
1289         i=s->ctx->session_cache_mode;
1290         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1291                 ((i & mode) == mode))
1292                 {
1293                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1294                         ?s->ctx->stats.sess_connect_good
1295                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1296                         {
1297                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1298                         }
1299                 }
1300         }
1301
1302 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1303         {
1304         return(s->method);
1305         }
1306
1307 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1308         {
1309         int conn= -1;
1310         int ret=1;
1311
1312         if (s->method != meth)
1313                 {
1314                 if (s->handshake_func != NULL)
1315                         conn=(s->handshake_func == s->method->ssl_connect);
1316
1317                 if (s->method->version == meth->version)
1318                         s->method=meth;
1319                 else
1320                         {
1321                         s->method->ssl_free(s);
1322                         s->method=meth;
1323                         ret=s->method->ssl_new(s);
1324                         }
1325
1326                 if (conn == 1)
1327                         s->handshake_func=meth->ssl_connect;
1328                 else if (conn == 0)
1329                         s->handshake_func=meth->ssl_accept;
1330                 }
1331         return(ret);
1332         }
1333
1334 int SSL_get_error(SSL *s,int i)
1335         {
1336         int reason;
1337         unsigned long l;
1338         BIO *bio;
1339
1340         if (i > 0) return(SSL_ERROR_NONE);
1341
1342         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1343          * etc, where we do encode the error */
1344         if ((l=ERR_peek_error()) != 0)
1345                 {
1346                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1347                         return(SSL_ERROR_SYSCALL);
1348                 else
1349                         return(SSL_ERROR_SSL);
1350                 }
1351
1352         if ((i < 0) && SSL_want_read(s))
1353                 {
1354                 bio=SSL_get_rbio(s);
1355                 if (BIO_should_read(bio))
1356                         return(SSL_ERROR_WANT_READ);
1357                 else if (BIO_should_write(bio))
1358                         return(SSL_ERROR_WANT_WRITE);
1359                 else if (BIO_should_io_special(bio))
1360                         {
1361                         reason=BIO_get_retry_reason(bio);
1362                         if (reason == BIO_RR_CONNECT)
1363                                 return(SSL_ERROR_WANT_CONNECT);
1364                         else
1365                                 return(SSL_ERROR_SYSCALL); /* unknown */
1366                         }
1367                 }
1368
1369         if ((i < 0) && SSL_want_write(s))
1370                 {
1371                 bio=SSL_get_wbio(s);
1372                 if (BIO_should_write(bio))
1373                         return(SSL_ERROR_WANT_WRITE);
1374                 else if (BIO_should_read(bio))
1375                         return(SSL_ERROR_WANT_READ);
1376                 else if (BIO_should_io_special(bio))
1377                         {
1378                         reason=BIO_get_retry_reason(bio);
1379                         if (reason == BIO_RR_CONNECT)
1380                                 return(SSL_ERROR_WANT_CONNECT);
1381                         else
1382                                 return(SSL_ERROR_SYSCALL);
1383                         }
1384                 }
1385         if ((i < 0) && SSL_want_x509_lookup(s))
1386                 {
1387                 return(SSL_ERROR_WANT_X509_LOOKUP);
1388                 }
1389
1390         if (i == 0)
1391                 {
1392                 if (s->version == SSL2_VERSION)
1393                         {
1394                         /* assume it is the socket being closed */
1395                         return(SSL_ERROR_ZERO_RETURN);
1396                         }
1397                 else
1398                         {
1399                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1400                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1401                                 return(SSL_ERROR_ZERO_RETURN);
1402                         }
1403                 }
1404         return(SSL_ERROR_SYSCALL);
1405         }
1406
1407 int SSL_do_handshake(SSL *s)
1408         {
1409         int ret=1;
1410
1411         if (s->handshake_func == NULL)
1412                 {
1413                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1414                 return(-1);
1415                 }
1416
1417         s->method->ssl_renegotiate_check(s);
1418
1419         if (SSL_in_init(s) || SSL_in_before(s))
1420                 {
1421                 ret=s->handshake_func(s);
1422                 }
1423         return(ret);
1424         }
1425
1426 /* For the next 2 functions, SSL_clear() sets shutdown and so
1427  * one of these calls will reset it */
1428 void SSL_set_accept_state(SSL *s)
1429         {
1430         s->server=1;
1431         s->shutdown=0;
1432         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1433         s->handshake_func=s->method->ssl_accept;
1434         /* clear the current cipher */
1435         ssl_clear_cipher_ctx(s);
1436         }
1437
1438 void SSL_set_connect_state(SSL *s)
1439         {
1440         s->server=0;
1441         s->shutdown=0;
1442         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1443         s->handshake_func=s->method->ssl_connect;
1444         /* clear the current cipher */
1445         ssl_clear_cipher_ctx(s);
1446         }
1447
1448 int ssl_undefined_function(SSL *s)
1449         {
1450         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1451         return(0);
1452         }
1453
1454 SSL_METHOD *ssl_bad_method(int ver)
1455         {
1456         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1457         return(NULL);
1458         }
1459
1460 char *SSL_get_version(SSL *s)
1461         {
1462         if (s->version == TLS1_VERSION)
1463                 return("TLSv1");
1464         else if (s->version == SSL3_VERSION)
1465                 return("SSLv3");
1466         else if (s->version == SSL2_VERSION)
1467                 return("SSLv2");
1468         else
1469                 return("unknown");
1470         }
1471
1472 SSL *SSL_dup(SSL *s)
1473         {
1474         STACK_OF(X509_NAME) *sk;
1475         X509_NAME *xn;
1476         SSL *ret;
1477         int i;
1478
1479         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1480             return(NULL);
1481
1482         /* This copies version, session-id, SSL_METHOD and 'cert' */
1483         SSL_copy_session_id(ret,s);
1484
1485         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1486         SSL_set_verify(ret,SSL_get_verify_mode(s),
1487                 SSL_get_verify_callback(s));
1488         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1489
1490         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1491
1492         ret->debug=s->debug;
1493         ret->options=s->options;
1494
1495         /* copy app data, a little dangerous perhaps */
1496         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1497                 goto err;
1498
1499         /* setup rbio, and wbio */
1500         if (s->rbio != NULL)
1501                 {
1502                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1503                         goto err;
1504                 }
1505         if (s->wbio != NULL)
1506                 {
1507                 if (s->wbio != s->rbio)
1508                         {
1509                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1510                                 goto err;
1511                         }
1512                 else
1513                         ret->wbio=ret->rbio;
1514                 }
1515
1516         /* dup the cipher_list and cipher_list_by_id stacks */
1517         if (s->cipher_list != NULL)
1518                 {
1519                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1520                         goto err;
1521                 }
1522         if (s->cipher_list_by_id != NULL)
1523                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1524                         == NULL)
1525                         goto err;
1526
1527         /* Dup the client_CA list */
1528         if (s->client_CA != NULL)
1529                 {
1530                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1531                 ret->client_CA=sk;
1532                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1533                         {
1534                         xn=sk_X509_NAME_value(sk,i);
1535                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1536                                 {
1537                                 X509_NAME_free(xn);
1538                                 goto err;
1539                                 }
1540                         }
1541                 }
1542
1543         ret->shutdown=s->shutdown;
1544         ret->state=s->state;
1545         ret->handshake_func=s->handshake_func;
1546         ret->server=s->server;
1547
1548         if (0)
1549                 {
1550 err:
1551                 if (ret != NULL) SSL_free(ret);
1552                 ret=NULL;
1553                 }
1554         return(ret);
1555         }
1556
1557 void ssl_clear_cipher_ctx(SSL *s)
1558         {
1559         if (s->enc_read_ctx != NULL)
1560                 {
1561                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1562                 Free(s->enc_read_ctx);
1563                 s->enc_read_ctx=NULL;
1564                 }
1565         if (s->enc_write_ctx != NULL)
1566                 {
1567                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1568                 Free(s->enc_write_ctx);
1569                 s->enc_write_ctx=NULL;
1570                 }
1571         if (s->expand != NULL)
1572                 {
1573                 COMP_CTX_free(s->expand);
1574                 s->expand=NULL;
1575                 }
1576         if (s->compress != NULL)
1577                 {
1578                 COMP_CTX_free(s->compress);
1579                 s->compress=NULL;
1580                 }
1581         }
1582
1583 /* Fix this function so that it takes an optional type parameter */
1584 X509 *SSL_get_certificate(SSL *s)
1585         {
1586         if (s->cert != NULL)
1587                 return(s->cert->key->x509);
1588         else
1589                 return(NULL);
1590         }
1591
1592 /* Fix this function so that it takes an optional type parameter */
1593 EVP_PKEY *SSL_get_privatekey(SSL *s)
1594         {
1595         if (s->cert != NULL)
1596                 return(s->cert->key->privatekey);
1597         else
1598                 return(NULL);
1599         }
1600
1601 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1602         {
1603         if ((s->session != NULL) && (s->session->cipher != NULL))
1604                 return(s->session->cipher);
1605         return(NULL);
1606         }
1607
1608 int ssl_init_wbio_buffer(SSL *s,int push)
1609         {
1610         BIO *bbio;
1611
1612         if (s->bbio == NULL)
1613                 {
1614                 bbio=BIO_new(BIO_f_buffer());
1615                 if (bbio == NULL) return(0);
1616                 s->bbio=bbio;
1617                 }
1618         else
1619                 {
1620                 bbio=s->bbio;
1621                 if (s->bbio == s->wbio)
1622                         s->wbio=BIO_pop(s->wbio);
1623                 }
1624         BIO_reset(bbio);
1625 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1626         if (!BIO_set_read_buffer_size(bbio,1))
1627                 {
1628                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1629                 return(0);
1630                 }
1631         if (push)
1632                 {
1633                 if (s->wbio != bbio)
1634                         s->wbio=BIO_push(bbio,s->wbio);
1635                 }
1636         else
1637                 {
1638                 if (s->wbio == bbio)
1639                         s->wbio=BIO_pop(bbio);
1640                 }
1641         return(1);
1642         }
1643
1644 void ssl_free_wbio_buffer(SSL *s)
1645         {
1646         BIO *under;
1647
1648         if (s->bbio == NULL) return;
1649
1650         if (s->bbio == s->wbio)
1651                 {
1652                 /* remove buffering */
1653                 under=BIO_pop(s->wbio);
1654                 if (under != NULL)
1655                         s->wbio=under;
1656                 else
1657                         abort(); /* ok */
1658                 }
1659         BIO_free(s->bbio);
1660         s->bbio=NULL;
1661         }
1662
1663 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1664         {
1665         ctx->quiet_shutdown=mode;
1666         }
1667
1668 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1669         {
1670         return(ctx->quiet_shutdown);
1671         }
1672
1673 void SSL_set_quiet_shutdown(SSL *s,int mode)
1674         {
1675         s->quiet_shutdown=mode;
1676         }
1677
1678 int SSL_get_quiet_shutdown(SSL *s)
1679         {
1680         return(s->quiet_shutdown);
1681         }
1682
1683 void SSL_set_shutdown(SSL *s,int mode)
1684         {
1685         s->shutdown=mode;
1686         }
1687
1688 int SSL_get_shutdown(SSL *s)
1689         {
1690         return(s->shutdown);
1691         }
1692
1693 int SSL_version(SSL *s)
1694         {
1695         return(s->version);
1696         }
1697
1698 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1699         {
1700         return(ssl->ctx);
1701         }
1702
1703 #ifndef NO_STDIO
1704 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1705         {
1706         return(X509_STORE_set_default_paths(ctx->cert_store));
1707         }
1708
1709 int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
1710         {
1711         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1712         }
1713 #endif
1714
1715 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1716         {
1717         ssl->info_callback=cb;
1718         }
1719
1720 void (*SSL_get_info_callback(SSL *ssl))(void)
1721         {
1722         return((void (*)())ssl->info_callback);
1723         }
1724
1725 int SSL_state(SSL *ssl)
1726         {
1727         return(ssl->state);
1728         }
1729
1730 void SSL_set_verify_result(SSL *ssl,long arg)
1731         {
1732         ssl->verify_result=arg;
1733         }
1734
1735 long SSL_get_verify_result(SSL *ssl)
1736         {
1737         return(ssl->verify_result);
1738         }
1739
1740 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1741                          int (*dup_func)(),void (*free_func)())
1742         {
1743         ssl_meth_num++;
1744         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1745                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1746         }
1747
1748 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1749         {
1750         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1751         }
1752
1753 void *SSL_get_ex_data(SSL *s,int idx)
1754         {
1755         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1756         }
1757
1758 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1759                              int (*dup_func)(),void (*free_func)())
1760         {
1761         ssl_ctx_meth_num++;
1762         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1763                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1764         }
1765
1766 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1767         {
1768         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1769         }
1770
1771 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1772         {
1773         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1774         }
1775
1776 int ssl_ok(SSL *s)
1777         {
1778         return(1);
1779         }
1780
1781 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1782         {
1783         return(ctx->cert_store);
1784         }
1785
1786 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1787         {
1788         if (ctx->cert_store != NULL)
1789                 X509_STORE_free(ctx->cert_store);
1790         ctx->cert_store=store;
1791         }
1792
1793 int SSL_want(SSL *s)
1794         {
1795         return(s->rwstate);
1796         }
1797
1798 /*!
1799  * \brief Set the callback for generating temporary RSA keys.
1800  * \param ctx the SSL context.
1801  * \param cb the callback
1802  */
1803
1804 #ifndef NO_RSA
1805 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1806                                                           int keylength))
1807     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1808 #endif
1809
1810 #ifndef NO_RSA
1811 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1812                                                           int keylength))
1813     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1814 #endif
1815
1816 #ifdef DOXYGEN
1817 /*!
1818  * \brief The RSA temporary key callback function.
1819  * \param ssl the SSL session.
1820  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1821  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1822  * the required key in bits.
1823  * \return the temporary RSA key.
1824  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1825  */
1826
1827 RSA *cb(SSL *ssl,int export,int keylength)
1828     {}
1829 #endif
1830
1831 /*!
1832  * \brief Set the callback for generating temporary DH keys.
1833  * \param ctx the SSL context.
1834  * \param dh the callback
1835  */
1836
1837 #ifndef NO_DH
1838 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1839                                                         int keylength))
1840     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1841
1842 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1843                                                         int keylength))
1844     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1845 #endif
1846
1847 #if defined(_WINDLL) && defined(WIN16)
1848 #include "../crypto/bio/bss_file.c"
1849 #endif
1850
1851 IMPLEMENT_STACK_OF(SSL_CIPHER)
1852 IMPLEMENT_STACK_OF(SSL_COMP)