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 OPENSSL_GLOBAL 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->cert != NULL)
 182                 {
 183                 /* Earlier library versions used to copy the pointer to
 184                  * the CERT, not its contents; only when setting new
 185                  * parameters for the per-SSL copy, ssl_cert_new would be
 186                  * called (and the direct reference to the per-SSL_CTX
 187                  * settings would be lost, but those still were indirectly
 188                  * accessed for various purposes, and for that reason they
 189                  * used to be known as s->ctx->default_cert).
 190                  * Now we don't look at the SSL_CTX's CERT after having
 191                  * duplicated it once. */
 192
 193                 s->cert = ssl_cert_dup(ctx->cert);
 194                 if (s->cert == NULL)
 195                         goto err;
 196                 }
 197         else
 198                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 199         s->sid_ctx_length=ctx->sid_ctx_length;
 200         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 201         s->verify_mode=ctx->verify_mode;
 202         s->verify_depth=ctx->verify_depth;
 203         s->verify_callback=ctx->default_verify_callback;
 204         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 205         s->ctx=ctx;
 206
 207         s->verify_result=X509_V_OK;
 208
 209         s->method=ctx->method;
 210
 211         if (!s->method->ssl_new(s))
 212                 goto err;
 213
 214         s->quiet_shutdown=ctx->quiet_shutdown;
 215         s->references=1;
 216         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 217         s->options=ctx->options;
 218         s->mode=ctx->mode;
 219         SSL_clear(s);
 220
 221         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
 222
 223         return(s);
 224 err:
 225         if (s != NULL)
 226                 {
 227                 if (s->cert != NULL)
 228                         ssl_cert_free(s->cert);
 229                 if (s->ctx != NULL)
 230                         SSL_CTX_free(s->ctx); /* decrement reference count */
 231                 Free(s);
 232                 }
 233         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 234         return(NULL);
 235         }
 236
 237 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 238                                    unsigned int sid_ctx_len)
 239     {
 240     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 241         {
 242         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 243         return 0;
 244         }
 245     ctx->sid_ctx_length=sid_ctx_len;
 246     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 247
 248     return 1;
 249     }
 250
 251 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 252                                unsigned int sid_ctx_len)
 253     {
 254     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 255         {
 256         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 257         return 0;
 258         }
 259     ssl->sid_ctx_length=sid_ctx_len;
 260     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 261
 262     return 1;
 263     }
 264
 265 void SSL_free(SSL *s)
 266         {
 267         int i;
 268
 269         if(s == NULL)
 270             return;
 271
 272         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 273 #ifdef REF_PRINT
 274         REF_PRINT("SSL",s);
 275 #endif
 276         if (i > 0) return;
 277 #ifdef REF_CHECK
 278         if (i < 0)
 279                 {
 280                 fprintf(stderr,"SSL_free, bad reference count\n");
 281                 abort(); /* ok */
 282                 }
 283 #endif
 284
 285         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 286
 287         if (s->bbio != NULL)
 288                 {
 289                 /* If the buffering BIO is in place, pop it off */
 290                 if (s->bbio == s->wbio)
 291                         {
 292                         s->wbio=BIO_pop(s->wbio);
 293                         }
 294                 BIO_free(s->bbio);
 295                 s->bbio=NULL;
 296                 }
 297         if (s->rbio != NULL)
 298                 BIO_free_all(s->rbio);
 299         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 300                 BIO_free_all(s->wbio);
 301
 302         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 303
 304         /* add extra stuff */
 305         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 306         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 307
 308         /* Make the next call work :-) */
 309         if (s->session != NULL)
 310                 {
 311                 ssl_clear_bad_session(s);
 312                 SSL_SESSION_free(s->session);
 313                 }
 314
 315         ssl_clear_cipher_ctx(s);
 316
 317         if (s->cert != NULL) ssl_cert_free(s->cert);
 318         /* Free up if allocated */
 319
 320         if (s->ctx) SSL_CTX_free(s->ctx);
 321
 322         if (s->client_CA != NULL)
 323                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 324
 325         if (s->method != NULL) s->method->ssl_free(s);
 326
 327         Free((char *)s);
 328         }
 329
 330 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 331         {
 332         /* If the output buffering BIO is still in place, remove it
 333          */
 334         if (s->bbio != NULL)
 335                 {
 336                 if (s->wbio == s->bbio)
 337                         {
 338                         s->wbio=s->wbio->next_bio;
 339                         s->bbio->next_bio=NULL;
 340                         }
 341                 }
 342         if ((s->rbio != NULL) && (s->rbio != rbio))
 343                 BIO_free_all(s->rbio);
 344         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 345                 BIO_free_all(s->wbio);
 346         s->rbio=rbio;
 347         s->wbio=wbio;
 348         }
 349
 350 BIO *SSL_get_rbio(SSL *s)
 351         { return(s->rbio); }
 352
 353 BIO *SSL_get_wbio(SSL *s)
 354         { return(s->wbio); }
 355
 356 int SSL_get_fd(SSL *s)
 357         {
 358         int ret= -1;
 359         BIO *b,*r;
 360
 361         b=SSL_get_rbio(s);
 362         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 363         if (r != NULL)
 364                 BIO_get_fd(r,&ret);
 365         return(ret);
 366         }
 367
 368 #ifndef NO_SOCK
 369 int SSL_set_fd(SSL *s,int fd)
 370         {
 371         int ret=0;
 372         BIO *bio=NULL;
 373
 374         bio=BIO_new(BIO_s_socket());
 375
 376         if (bio == NULL)
 377                 {
 378                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 379                 goto err;
 380                 }
 381         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 382         SSL_set_bio(s,bio,bio);
 383         ret=1;
 384 err:
 385         return(ret);
 386         }
 387
 388 int SSL_set_wfd(SSL *s,int fd)
 389         {
 390         int ret=0;
 391         BIO *bio=NULL;
 392
 393         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 394                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 395                 {
 396                 bio=BIO_new(BIO_s_socket());
 397
 398                 if (bio == NULL)
 399                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 400                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 401                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 402                 }
 403         else
 404                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 405         ret=1;
 406 err:
 407         return(ret);
 408         }
 409
 410 int SSL_set_rfd(SSL *s,int fd)
 411         {
 412         int ret=0;
 413         BIO *bio=NULL;
 414
 415         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 416                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 417                 {
 418                 bio=BIO_new(BIO_s_socket());
 419
 420                 if (bio == NULL)
 421                         {
 422                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 423                         goto err;
 424                         }
 425                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 426                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 427                 }
 428         else
 429                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 430         ret=1;
 431 err:
 432         return(ret);
 433         }
 434 #endif
 435
 436 int SSL_get_verify_mode(SSL *s)
 437         {
 438         return(s->verify_mode);
 439         }
 440
 441 int SSL_get_verify_depth(SSL *s)
 442         {
 443         return(s->verify_depth);
 444         }
 445
 446 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
 447         {
 448         return(s->verify_callback);
 449         }
 450
 451 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
 452         {
 453         return(ctx->verify_mode);
 454         }
 455
 456 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
 457         {
 458         return(ctx->verify_depth);
 459         }
 460
 461 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
 462         {
 463         return(ctx->default_verify_callback);
 464         }
 465
 466 void SSL_set_verify(SSL *s,int mode,
 467                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 468         {
 469         s->verify_mode=mode;
 470         if (callback != NULL)
 471                 s->verify_callback=callback;
 472         }
 473
 474 void SSL_set_verify_depth(SSL *s,int depth)
 475         {
 476         s->verify_depth=depth;
 477         }
 478
 479 void SSL_set_read_ahead(SSL *s,int yes)
 480         {
 481         s->read_ahead=yes;
 482         }
 483
 484 int SSL_get_read_ahead(SSL *s)
 485         {
 486         return(s->read_ahead);
 487         }
 488
 489 int SSL_pending(SSL *s)
 490         {
 491         return(s->method->ssl_pending(s));
 492         }
 493
 494 X509 *SSL_get_peer_certificate(SSL *s)
 495         {
 496         X509 *r;
 497
 498         if ((s == NULL) || (s->session == NULL))
 499                 r=NULL;
 500         else
 501                 r=s->session->peer;
 502
 503         if (r == NULL) return(r);
 504
 505         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 506
 507         return(r);
 508         }
 509
 510 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
 511         {
 512         STACK_OF(X509) *r;
 513
 514         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 515                 r=NULL;
 516         else
 517                 r=s->session->sess_cert->cert_chain;
 518
 519         return(r);
 520         }
 521
 522 /* Now in theory, since the calling process own 't' it should be safe to
 523  * modify.  We need to be able to read f without being hassled */
 524 void SSL_copy_session_id(SSL *t,SSL *f)
 525         {
 526         CERT *tmp;
 527
 528         /* Do we need to to SSL locking? */
 529         SSL_set_session(t,SSL_get_session(f));
 530
 531         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 532          * vice-versa */
 533         if (t->method != f->method)
 534                 {
 535                 t->method->ssl_free(t); /* cleanup current */
 536                 t->method=f->method;    /* change method */
 537                 t->method->ssl_new(t);  /* setup new */
 538                 }
 539
 540         tmp=t->cert;
 541         if (f->cert != NULL)
 542                 {
 543                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 544                 t->cert=f->cert;
 545                 }
 546         else
 547                 t->cert=NULL;
 548         if (tmp != NULL) ssl_cert_free(tmp);
 549         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 550         }
 551
 552 /* Fix this so it checks all the valid key/cert options */
 553 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 554         {
 555         if (    (ctx == NULL) ||
 556                 (ctx->cert == NULL) ||
 557                 (ctx->cert->key->x509 == NULL))
 558                 {
 559                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 560                 return(0);
 561                 }
 562         if      (ctx->cert->key->privatekey == NULL)
 563                 {
 564                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 565                 return(0);
 566                 }
 567         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 568         }
 569
 570 /* Fix this function so that it takes an optional type parameter */
 571 int SSL_check_private_key(SSL *ssl)
 572         {
 573         if (ssl == NULL)
 574                 {
 575                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 576                 return(0);
 577                 }
 578         if (ssl->cert == NULL)
 579                 {
 580                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 581                 return 0;
 582                 }
 583         if (ssl->cert->key->x509 == NULL)
 584                 {
 585                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 586                 return(0);
 587                 }
 588         if (ssl->cert->key->privatekey == NULL)
 589                 {
 590                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 591                 return(0);
 592                 }
 593         return(X509_check_private_key(ssl->cert->key->x509,
 594                 ssl->cert->key->privatekey));
 595         }
 596
 597 int SSL_accept(SSL *s)
 598         {
 599         if (s->handshake_func == 0)
 600                 /* Not properly initialized yet */
 601                 SSL_set_accept_state(s);
 602
 603         return(s->method->ssl_accept(s));
 604         }
 605
 606 int SSL_connect(SSL *s)
 607         {
 608         if (s->handshake_func == 0)
 609                 /* Not properly initialized yet */
 610                 SSL_set_connect_state(s);
 611
 612         return(s->method->ssl_connect(s));
 613         }
 614
 615 long SSL_get_default_timeout(SSL *s)
 616         {
 617         return(s->method->get_timeout());
 618         }
 619
 620 int SSL_read(SSL *s,char *buf,int num)
 621         {
 622         if (s->handshake_func == 0)
 623                 {
 624                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 625                 return -1;
 626                 }
 627
 628         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 629                 {
 630                 s->rwstate=SSL_NOTHING;
 631                 return(0);
 632                 }
 633         return(s->method->ssl_read(s,buf,num));
 634         }
 635
 636 int SSL_peek(SSL *s,char *buf,int num)
 637         {
 638         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 639                 {
 640                 return(0);
 641                 }
 642         return(s->method->ssl_peek(s,buf,num));
 643         }
 644
 645 int SSL_write(SSL *s,const char *buf,int num)
 646         {
 647         if (s->handshake_func == 0)
 648                 {
 649                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 650                 return -1;
 651                 }
 652
 653         if (s->shutdown & SSL_SENT_SHUTDOWN)
 654                 {
 655                 s->rwstate=SSL_NOTHING;
 656                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 657                 return(-1);
 658                 }
 659         return(s->method->ssl_write(s,buf,num));
 660         }
 661
 662 int SSL_shutdown(SSL *s)
 663         {
 664         /* Note that this function behaves differently from what one might
 665          * expect.  Return values are 0 for no success (yet),
 666          * 1 for success; but calling it once is usually not enough,
 667          * even if blocking I/O is used (see ssl3_shutdown).
 668          */
 669
 670         if (s->handshake_func == 0)
 671                 {
 672                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 673                 return -1;
 674                 }
 675
 676         if ((s != NULL) && !SSL_in_init(s))
 677                 return(s->method->ssl_shutdown(s));
 678         else
 679                 return(1);
 680         }
 681
 682 int SSL_renegotiate(SSL *s)
 683         {
 684         s->new_session=1;
 685         return(s->method->ssl_renegotiate(s));
 686         }
 687
 688 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 689         {
 690         long l;
 691
 692         switch (cmd)
 693                 {
 694         case SSL_CTRL_GET_READ_AHEAD:
 695                 return(s->read_ahead);
 696         case SSL_CTRL_SET_READ_AHEAD:
 697                 l=s->read_ahead;
 698                 s->read_ahead=larg;
 699                 return(l);
 700         case SSL_CTRL_OPTIONS:
 701                 return(s->options|=larg);
 702         case SSL_CTRL_MODE:
 703                 return(s->mode|=larg);
 704         default:
 705                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 706                 }
 707         }
 708
 709 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 710         {
 711         long l;
 712
 713         switch (cmd)
 714                 {
 715         case SSL_CTRL_GET_READ_AHEAD:
 716                 return(ctx->read_ahead);
 717         case SSL_CTRL_SET_READ_AHEAD:
 718                 l=ctx->read_ahead;
 719                 ctx->read_ahead=larg;
 720                 return(l);
 721
 722         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 723                 l=ctx->session_cache_size;
 724                 ctx->session_cache_size=larg;
 725                 return(l);
 726         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 727                 return(ctx->session_cache_size);
 728         case SSL_CTRL_SET_SESS_CACHE_MODE:
 729                 l=ctx->session_cache_mode;
 730                 ctx->session_cache_mode=larg;
 731                 return(l);
 732         case SSL_CTRL_GET_SESS_CACHE_MODE:
 733                 return(ctx->session_cache_mode);
 734
 735         case SSL_CTRL_SESS_NUMBER:
 736                 return(ctx->sessions->num_items);
 737         case SSL_CTRL_SESS_CONNECT:
 738                 return(ctx->stats.sess_connect);
 739         case SSL_CTRL_SESS_CONNECT_GOOD:
 740                 return(ctx->stats.sess_connect_good);
 741         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 742                 return(ctx->stats.sess_connect_renegotiate);
 743         case SSL_CTRL_SESS_ACCEPT:
 744                 return(ctx->stats.sess_accept);
 745         case SSL_CTRL_SESS_ACCEPT_GOOD:
 746                 return(ctx->stats.sess_accept_good);
 747         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 748                 return(ctx->stats.sess_accept_renegotiate);
 749         case SSL_CTRL_SESS_HIT:
 750                 return(ctx->stats.sess_hit);
 751         case SSL_CTRL_SESS_CB_HIT:
 752                 return(ctx->stats.sess_cb_hit);
 753         case SSL_CTRL_SESS_MISSES:
 754                 return(ctx->stats.sess_miss);
 755         case SSL_CTRL_SESS_TIMEOUTS:
 756                 return(ctx->stats.sess_timeout);
 757         case SSL_CTRL_SESS_CACHE_FULL:
 758                 return(ctx->stats.sess_cache_full);
 759         case SSL_CTRL_OPTIONS:
 760                 return(ctx->options|=larg);
 761         case SSL_CTRL_MODE:
 762                 return(ctx->mode|=larg);
 763         default:
 764                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 765                 }
 766         }
 767
 768 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 769         {
 770         long l;
 771
 772         l=a->id-b->id;
 773         if (l == 0L)
 774                 return(0);
 775         else
 776                 return((l > 0)?1:-1);
 777         }
 778
 779 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 780         {
 781         long l;
 782
 783         l=(*ap)->id-(*bp)->id;
 784         if (l == 0L)
 785                 return(0);
 786         else
 787                 return((l > 0)?1:-1);
 788         }
 789
 790 /** return a STACK of the ciphers available for the SSL and in order of
 791  * preference */
 792 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 793         {
 794         if ((s != NULL) && (s->cipher_list != NULL))
 795                 {
 796                 return(s->cipher_list);
 797                 }
 798         else if ((s->ctx != NULL) &&
 799                 (s->ctx->cipher_list != NULL))
 800                 {
 801                 return(s->ctx->cipher_list);
 802                 }
 803         return(NULL);
 804         }
 805
 806 /** return a STACK of the ciphers available for the SSL and in order of
 807  * algorithm id */
 808 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 809         {
 810         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 811                 {
 812                 return(s->cipher_list_by_id);
 813                 }
 814         else if ((s != NULL) && (s->ctx != NULL) &&
 815                 (s->ctx->cipher_list_by_id != NULL))
 816                 {
 817                 return(s->ctx->cipher_list_by_id);
 818                 }
 819         return(NULL);
 820         }
 821
 822 /** The old interface to get the same thing as SSL_get_ciphers() */
 823 const char *SSL_get_cipher_list(SSL *s,int n)
 824         {
 825         SSL_CIPHER *c;
 826         STACK_OF(SSL_CIPHER) *sk;
 827
 828         if (s == NULL) return(NULL);
 829         sk=SSL_get_ciphers(s);
 830         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 831                 return(NULL);
 832         c=sk_SSL_CIPHER_value(sk,n);
 833         if (c == NULL) return(NULL);
 834         return(c->name);
 835         }
 836
 837 /** specify the ciphers to be used by defaut by the SSL_CTX */
 838 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 839         {
 840         STACK_OF(SSL_CIPHER) *sk;
 841
 842         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 843                 &ctx->cipher_list_by_id,str);
 844 /* XXXX */
 845         return((sk == NULL)?0:1);
 846         }
 847
 848 /** specify the ciphers to be used by the SSL */
 849 int SSL_set_cipher_list(SSL *s,char *str)
 850         {
 851         STACK_OF(SSL_CIPHER) *sk;
 852
 853         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 854                 &s->cipher_list_by_id,str);
 855 /* XXXX */
 856         return((sk == NULL)?0:1);
 857         }
 858
 859 /* works well for SSLv2, not so good for SSLv3 */
 860 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 861         {
 862         char *p;
 863         const char *cp;
 864         STACK_OF(SSL_CIPHER) *sk;
 865         SSL_CIPHER *c;
 866         int i;
 867
 868         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 869                 (len < 2))
 870                 return(NULL);
 871
 872         p=buf;
 873         sk=s->session->ciphers;
 874         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 875                 {
 876                 /* Decrement for either the ':' or a '\0' */
 877                 len--;
 878                 c=sk_SSL_CIPHER_value(sk,i);
 879                 for (cp=c->name; *cp; )
 880                         {
 881                         if (len-- == 0)
 882                                 {
 883                                 *p='\0';
 884                                 return(buf);
 885                                 }
 886                         else
 887                                 *(p++)= *(cp++);
 888                         }
 889                 *(p++)=':';
 890                 }
 891         p[-1]='\0';
 892         return(buf);
 893         }
 894
 895 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
 896         {
 897         int i,j=0;
 898         SSL_CIPHER *c;
 899         unsigned char *q;
 900
 901         if (sk == NULL) return(0);
 902         q=p;
 903
 904         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 905                 {
 906                 c=sk_SSL_CIPHER_value(sk,i);
 907                 j=ssl_put_cipher_by_char(s,c,p);
 908                 p+=j;
 909                 }
 910         return(p-q);
 911         }
 912
 913 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 914                                                STACK_OF(SSL_CIPHER) **skp)
 915         {
 916         SSL_CIPHER *c;
 917         STACK_OF(SSL_CIPHER) *sk;
 918         int i,n;
 919
 920         n=ssl_put_cipher_by_char(s,NULL,NULL);
 921         if ((num%n) != 0)
 922                 {
 923                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 924                 return(NULL);
 925                 }
 926         if ((skp == NULL) || (*skp == NULL))
 927                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
 928         else
 929                 {
 930                 sk= *skp;
 931                 sk_SSL_CIPHER_zero(sk);
 932                 }
 933
 934         for (i=0; i<num; i+=n)
 935                 {
 936                 c=ssl_get_cipher_by_char(s,p);
 937                 p+=n;
 938                 if (c != NULL)
 939                         {
 940                         if (!sk_SSL_CIPHER_push(sk,c))
 941                                 {
 942                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 943                                 goto err;
 944                                 }
 945                         }
 946                 }
 947
 948         if (skp != NULL)
 949                 *skp=sk;
 950         return(sk);
 951 err:
 952         if ((skp == NULL) || (*skp == NULL))
 953                 sk_SSL_CIPHER_free(sk);
 954         return(NULL);
 955         }
 956
 957 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 958         {
 959         unsigned long l;
 960
 961         l=(unsigned long)
 962                 ((unsigned int) a->session_id[0]     )|
 963                 ((unsigned int) a->session_id[1]<< 8L)|
 964                 ((unsigned long)a->session_id[2]<<16L)|
 965                 ((unsigned long)a->session_id[3]<<24L);
 966         return(l);
 967         }
 968
 969 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 970         {
 971         if (a->ssl_version != b->ssl_version)
 972                 return(1);
 973         if (a->session_id_length != b->session_id_length)
 974                 return(1);
 975         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 976         }
 977
 978 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 979         {
 980         SSL_CTX *ret=NULL;
 981
 982         if (meth == NULL)
 983                 {
 984                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 985                 return(NULL);
 986                 }
 987
 988         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 989                 {
 990                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 991                 goto err;
 992                 }
 993         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 994         if (ret == NULL)
 995                 goto err;
 996
 997         memset(ret,0,sizeof(SSL_CTX));
 998
 999         ret->method=meth;
1000
1001         ret->cert_store=NULL;
1002         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1003         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1004         ret->session_cache_head=NULL;
1005         ret->session_cache_tail=NULL;
1006
1007         /* We take the system default */
1008         ret->session_timeout=meth->get_timeout();
1009
1010         ret->new_session_cb=NULL;
1011         ret->remove_session_cb=NULL;
1012         ret->get_session_cb=NULL;
1013
1014         memset((char *)&ret->stats,0,sizeof(ret->stats));
1015
1016         ret->references=1;
1017         ret->quiet_shutdown=0;
1018
1019 /*      ret->cipher=NULL;*/
1020 /*      ret->s2->challenge=NULL;
1021         ret->master_key=NULL;
1022         ret->key_arg=NULL;
1023         ret->s2->conn_id=NULL; */
1024
1025         ret->info_callback=NULL;
1026
1027         ret->app_verify_callback=NULL;
1028         ret->app_verify_arg=NULL;
1029
1030         ret->read_ahead=0;
1031         ret->verify_mode=SSL_VERIFY_NONE;
1032         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1033         ret->default_verify_callback=NULL;
1034         if ((ret->cert=ssl_cert_new()) == NULL)
1035                 goto err;
1036
1037         ret->default_passwd_callback=NULL;
1038         ret->default_passwd_callback_userdata=NULL;
1039         ret->client_cert_cb=NULL;
1040
1041         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
1042         if (ret->sessions == NULL) goto err;
1043         ret->cert_store=X509_STORE_new();
1044         if (ret->cert_store == NULL) goto err;
1045
1046         ssl_create_cipher_list(ret->method,
1047                 &ret->cipher_list,&ret->cipher_list_by_id,
1048                 SSL_DEFAULT_CIPHER_LIST);
1049         if (ret->cipher_list == NULL
1050             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1051                 {
1052                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1053                 goto err2;
1054                 }
1055
1056         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1057                 {
1058                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1059                 goto err2;
1060                 }
1061         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1062                 {
1063                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1064                 goto err2;
1065                 }
1066         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1067                 {
1068                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1069                 goto err2;
1070                 }
1071
1072         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1073                 goto err;
1074
1075         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1076
1077         ret->extra_certs=NULL;
1078         ret->comp_methods=SSL_COMP_get_compression_methods();
1079
1080         return(ret);
1081 err:
1082         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1083 err2:
1084         if (ret != NULL) SSL_CTX_free(ret);
1085         return(NULL);
1086         }
1087
1088 static void SSL_COMP_free(SSL_COMP *comp)
1089     { Free(comp); }
1090
1091 void SSL_CTX_free(SSL_CTX *a)
1092         {
1093         int i;
1094
1095         if (a == NULL) return;
1096
1097         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1098 #ifdef REF_PRINT
1099         REF_PRINT("SSL_CTX",a);
1100 #endif
1101         if (i > 0) return;
1102 #ifdef REF_CHECK
1103         if (i < 0)
1104                 {
1105                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1106                 abort(); /* ok */
1107                 }
1108 #endif
1109         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1110
1111         if (a->sessions != NULL)
1112                 {
1113                 SSL_CTX_flush_sessions(a,0);
1114                 lh_free(a->sessions);
1115                 }
1116         if (a->cert_store != NULL)
1117                 X509_STORE_free(a->cert_store);
1118         if (a->cipher_list != NULL)
1119                 sk_SSL_CIPHER_free(a->cipher_list);
1120         if (a->cipher_list_by_id != NULL)
1121                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1122         if (a->cert != NULL)
1123                 ssl_cert_free(a->cert);
1124         if (a->client_CA != NULL)
1125                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1126         if (a->extra_certs != NULL)
1127                 sk_X509_pop_free(a->extra_certs,X509_free);
1128         if (a->comp_methods != NULL)
1129                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1130         Free((char *)a);
1131         }
1132
1133 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1134         {
1135         ctx->default_passwd_callback=cb;
1136         }
1137
1138 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1139         {
1140         ctx->default_passwd_callback_userdata=u;
1141         }
1142
1143 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
1144         {
1145         ctx->app_verify_callback=cb;
1146         ctx->app_verify_arg=arg;
1147         }
1148
1149 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1150         {
1151         ctx->verify_mode=mode;
1152         ctx->default_verify_callback=cb;
1153         /* This needs cleaning up EAY EAY EAY */
1154         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1155         }
1156
1157 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1158         {
1159         ctx->verify_depth=depth;
1160         }
1161
1162 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1163         {
1164         CERT_PKEY *cpk;
1165         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1166         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1167         int rsa_tmp_export,dh_tmp_export,kl;
1168         unsigned long mask,emask;
1169
1170         if (c == NULL) return;
1171
1172         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1173
1174 #ifndef NO_RSA
1175         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1176         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1177                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1178 #else
1179         rsa_tmp=rsa_tmp_export=0;
1180 #endif
1181 #ifndef NO_DH
1182         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1183         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1184                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1185 #else
1186         dh_tmp=dh_tmp_export=0;
1187 #endif
1188
1189         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1190         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1191         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1192         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1193         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1194         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1195         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1196         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1197         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1198         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1199         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1200 /* FIX THIS EAY EAY EAY */
1201         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1202         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1203
1204         mask=0;
1205         emask=0;
1206
1207 #ifdef CIPHER_DEBUG
1208         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1209                 rsa_tmp,rsa_tmp_export,dh_tmp,
1210                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1211 #endif
1212
1213         if (rsa_enc || (rsa_tmp && rsa_sign))
1214                 mask|=SSL_kRSA;
1215         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1216                 emask|=SSL_kRSA;
1217
1218 #if 0
1219         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1220         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1221                 (rsa_enc || rsa_sign || dsa_sign))
1222                 mask|=SSL_kEDH;
1223         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1224                 (rsa_enc || rsa_sign || dsa_sign))
1225                 emask|=SSL_kEDH;
1226 #endif
1227
1228         if (dh_tmp_export)
1229                 emask|=SSL_kEDH;
1230
1231         if (dh_tmp)
1232                 mask|=SSL_kEDH;
1233
1234         if (dh_rsa) mask|=SSL_kDHr;
1235         if (dh_rsa_export) emask|=SSL_kDHr;
1236
1237         if (dh_dsa) mask|=SSL_kDHd;
1238         if (dh_dsa_export) emask|=SSL_kDHd;
1239
1240         if (rsa_enc || rsa_sign)
1241                 {
1242                 mask|=SSL_aRSA;
1243                 emask|=SSL_aRSA;
1244                 }
1245
1246         if (dsa_sign)
1247                 {
1248                 mask|=SSL_aDSS;
1249                 emask|=SSL_aDSS;
1250                 }
1251
1252 #ifdef SSL_ALLOW_ADH
1253         mask|=SSL_aNULL;
1254         emask|=SSL_aNULL;
1255 #endif
1256
1257         c->mask=mask;
1258         c->export_mask=emask;
1259         c->valid=1;
1260         }
1261
1262 /* THIS NEEDS CLEANING UP */
1263 X509 *ssl_get_server_send_cert(SSL *s)
1264         {
1265         unsigned long alg,mask,kalg;
1266         CERT *c;
1267         int i,is_export;
1268
1269         c=s->cert;
1270         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1271         alg=s->s3->tmp.new_cipher->algorithms;
1272         is_export=SSL_IS_EXPORT(alg);
1273         mask=is_export?c->export_mask:c->mask;
1274         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1275
1276         if      (kalg & SSL_kDHr)
1277                 i=SSL_PKEY_DH_RSA;
1278         else if (kalg & SSL_kDHd)
1279                 i=SSL_PKEY_DH_DSA;
1280         else if (kalg & SSL_aDSS)
1281                 i=SSL_PKEY_DSA_SIGN;
1282         else if (kalg & SSL_aRSA)
1283                 {
1284                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1285                         i=SSL_PKEY_RSA_SIGN;
1286                 else
1287                         i=SSL_PKEY_RSA_ENC;
1288                 }
1289         else /* if (kalg & SSL_aNULL) */
1290                 {
1291                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1292                 return(NULL);
1293                 }
1294         if (c->pkeys[i].x509 == NULL) return(NULL);
1295         return(c->pkeys[i].x509);
1296         }
1297
1298 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1299         {
1300         unsigned long alg;
1301         CERT *c;
1302
1303         alg=cipher->algorithms;
1304         c=s->cert;
1305
1306         if ((alg & SSL_aDSS) &&
1307                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1308                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1309         else if (alg & SSL_aRSA)
1310                 {
1311                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1312                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1313                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1314                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1315                 else
1316                         return(NULL);
1317                 }
1318         else /* if (alg & SSL_aNULL) */
1319                 {
1320                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1321                 return(NULL);
1322                 }
1323         }
1324
1325 void ssl_update_cache(SSL *s,int mode)
1326         {
1327         int i;
1328
1329         /* If the session_id_length is 0, we are not supposed to cache it,
1330          * and it would be rather hard to do anyway :-) */
1331         if (s->session->session_id_length == 0) return;
1332
1333         if ((s->ctx->session_cache_mode & mode)
1334                 && (!s->hit)
1335                 && SSL_CTX_add_session(s->ctx,s->session)
1336                 && (s->ctx->new_session_cb != NULL))
1337                 {
1338                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1339                 if (!s->ctx->new_session_cb(s,s->session))
1340                         SSL_SESSION_free(s->session);
1341                 }
1342
1343         /* auto flush every 255 connections */
1344         i=s->ctx->session_cache_mode;
1345         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1346                 ((i & mode) == mode))
1347                 {
1348                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1349                         ?s->ctx->stats.sess_connect_good
1350                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1351                         {
1352                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1353                         }
1354                 }
1355         }
1356
1357 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1358         {
1359         return(s->method);
1360         }
1361
1362 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1363         {
1364         int conn= -1;
1365         int ret=1;
1366
1367         if (s->method != meth)
1368                 {
1369                 if (s->handshake_func != NULL)
1370                         conn=(s->handshake_func == s->method->ssl_connect);
1371
1372                 if (s->method->version == meth->version)
1373                         s->method=meth;
1374                 else
1375                         {
1376                         s->method->ssl_free(s);
1377                         s->method=meth;
1378                         ret=s->method->ssl_new(s);
1379                         }
1380
1381                 if (conn == 1)
1382                         s->handshake_func=meth->ssl_connect;
1383                 else if (conn == 0)
1384                         s->handshake_func=meth->ssl_accept;
1385                 }
1386         return(ret);
1387         }
1388
1389 int SSL_get_error(SSL *s,int i)
1390         {
1391         int reason;
1392         unsigned long l;
1393         BIO *bio;
1394
1395         if (i > 0) return(SSL_ERROR_NONE);
1396
1397         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1398          * etc, where we do encode the error */
1399         if ((l=ERR_peek_error()) != 0)
1400                 {
1401                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1402                         return(SSL_ERROR_SYSCALL);
1403                 else
1404                         return(SSL_ERROR_SSL);
1405                 }
1406
1407         if ((i < 0) && SSL_want_read(s))
1408                 {
1409                 bio=SSL_get_rbio(s);
1410                 if (BIO_should_read(bio))
1411                         return(SSL_ERROR_WANT_READ);
1412                 else if (BIO_should_write(bio))
1413                         /* This one doesn't make too much sense ... We never try
1414                          * to write to the rbio, and an application program where
1415                          * rbio and wbio are separate couldn't even know what it
1416                          * should wait for.
1417                          * However if we ever set s->rwstate incorrectly
1418                          * (so that we have SSL_want_read(s) instead of
1419                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1420                          * this test works around that bug; so it might be safer
1421                          * to keep it. */
1422                         return(SSL_ERROR_WANT_WRITE);
1423                 else if (BIO_should_io_special(bio))
1424                         {
1425                         reason=BIO_get_retry_reason(bio);
1426                         if (reason == BIO_RR_CONNECT)
1427                                 return(SSL_ERROR_WANT_CONNECT);
1428                         else
1429                                 return(SSL_ERROR_SYSCALL); /* unknown */
1430                         }
1431                 }
1432
1433         if ((i < 0) && SSL_want_write(s))
1434                 {
1435                 bio=SSL_get_wbio(s);
1436                 if (BIO_should_write(bio))
1437                         return(SSL_ERROR_WANT_WRITE);
1438                 else if (BIO_should_read(bio))
1439                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1440                         return(SSL_ERROR_WANT_READ);
1441                 else if (BIO_should_io_special(bio))
1442                         {
1443                         reason=BIO_get_retry_reason(bio);
1444                         if (reason == BIO_RR_CONNECT)
1445                                 return(SSL_ERROR_WANT_CONNECT);
1446                         else
1447                                 return(SSL_ERROR_SYSCALL);
1448                         }
1449                 }
1450         if ((i < 0) && SSL_want_x509_lookup(s))
1451                 {
1452                 return(SSL_ERROR_WANT_X509_LOOKUP);
1453                 }
1454
1455         if (i == 0)
1456                 {
1457                 if (s->version == SSL2_VERSION)
1458                         {
1459                         /* assume it is the socket being closed */
1460                         return(SSL_ERROR_ZERO_RETURN);
1461                         }
1462                 else
1463                         {
1464                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1465                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1466                                 return(SSL_ERROR_ZERO_RETURN);
1467                         }
1468                 }
1469         return(SSL_ERROR_SYSCALL);
1470         }
1471
1472 int SSL_do_handshake(SSL *s)
1473         {
1474         int ret=1;
1475
1476         if (s->handshake_func == NULL)
1477                 {
1478                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1479                 return(-1);
1480                 }
1481
1482         s->method->ssl_renegotiate_check(s);
1483
1484         if (SSL_in_init(s) || SSL_in_before(s))
1485                 {
1486                 ret=s->handshake_func(s);
1487                 }
1488         return(ret);
1489         }
1490
1491 /* For the next 2 functions, SSL_clear() sets shutdown and so
1492  * one of these calls will reset it */
1493 void SSL_set_accept_state(SSL *s)
1494         {
1495         s->server=1;
1496         s->shutdown=0;
1497         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1498         s->handshake_func=s->method->ssl_accept;
1499         /* clear the current cipher */
1500         ssl_clear_cipher_ctx(s);
1501         }
1502
1503 void SSL_set_connect_state(SSL *s)
1504         {
1505         s->server=0;
1506         s->shutdown=0;
1507         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1508         s->handshake_func=s->method->ssl_connect;
1509         /* clear the current cipher */
1510         ssl_clear_cipher_ctx(s);
1511         }
1512
1513 int ssl_undefined_function(SSL *s)
1514         {
1515         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1516         return(0);
1517         }
1518
1519 SSL_METHOD *ssl_bad_method(int ver)
1520         {
1521         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1522         return(NULL);
1523         }
1524
1525 char *SSL_get_version(SSL *s)
1526         {
1527         if (s->version == TLS1_VERSION)
1528                 return("TLSv1");
1529         else if (s->version == SSL3_VERSION)
1530                 return("SSLv3");
1531         else if (s->version == SSL2_VERSION)
1532                 return("SSLv2");
1533         else
1534                 return("unknown");
1535         }
1536
1537 SSL *SSL_dup(SSL *s)
1538         {
1539         STACK_OF(X509_NAME) *sk;
1540         X509_NAME *xn;
1541         SSL *ret;
1542         int i;
1543
1544         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1545             return(NULL);
1546
1547         if (s->session != NULL)
1548                 {
1549                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1550                 SSL_copy_session_id(ret,s);
1551                 }
1552         else
1553                 {
1554                 /* No session has been established yet, so we have to expect
1555                  * that s->cert or ret->cert will be changed later --
1556                  * they should not both point to the same object,
1557                  * and thus we can't use SSL_copy_session_id. */
1558
1559                 ret->method = s->method;
1560                 ret->method->ssl_new(ret);
1561
1562                 if (s->cert != NULL)
1563                         {
1564                         ret->cert = ssl_cert_dup(s->cert);
1565                         if (ret->cert == NULL)
1566                                 goto err;
1567                         }
1568
1569                 SSL_set_session_id_context(ret,
1570                         s->sid_ctx, s->sid_ctx_length);
1571                 }
1572
1573         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1574         SSL_set_verify(ret,SSL_get_verify_mode(s),
1575                 SSL_get_verify_callback(s));
1576         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1577
1578         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1579
1580         ret->debug=s->debug;
1581         ret->options=s->options;
1582
1583         /* copy app data, a little dangerous perhaps */
1584         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1585                 goto err;
1586
1587         /* setup rbio, and wbio */
1588         if (s->rbio != NULL)
1589                 {
1590                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1591                         goto err;
1592                 }
1593         if (s->wbio != NULL)
1594                 {
1595                 if (s->wbio != s->rbio)
1596                         {
1597                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1598                                 goto err;
1599                         }
1600                 else
1601                         ret->wbio=ret->rbio;
1602                 }
1603
1604         /* dup the cipher_list and cipher_list_by_id stacks */
1605         if (s->cipher_list != NULL)
1606                 {
1607                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1608                         goto err;
1609                 }
1610         if (s->cipher_list_by_id != NULL)
1611                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1612                         == NULL)
1613                         goto err;
1614
1615         /* Dup the client_CA list */
1616         if (s->client_CA != NULL)
1617                 {
1618                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1619                 ret->client_CA=sk;
1620                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1621                         {
1622                         xn=sk_X509_NAME_value(sk,i);
1623                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1624                                 {
1625                                 X509_NAME_free(xn);
1626                                 goto err;
1627                                 }
1628                         }
1629                 }
1630
1631         ret->shutdown=s->shutdown;
1632         ret->state=s->state;
1633         ret->handshake_func=s->handshake_func;
1634         ret->server=s->server;
1635
1636         if (0)
1637                 {
1638 err:
1639                 if (ret != NULL) SSL_free(ret);
1640                 ret=NULL;
1641                 }
1642         return(ret);
1643         }
1644
1645 void ssl_clear_cipher_ctx(SSL *s)
1646         {
1647         if (s->enc_read_ctx != NULL)
1648                 {
1649                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1650                 Free(s->enc_read_ctx);
1651                 s->enc_read_ctx=NULL;
1652                 }
1653         if (s->enc_write_ctx != NULL)
1654                 {
1655                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1656                 Free(s->enc_write_ctx);
1657                 s->enc_write_ctx=NULL;
1658                 }
1659         if (s->expand != NULL)
1660                 {
1661                 COMP_CTX_free(s->expand);
1662                 s->expand=NULL;
1663                 }
1664         if (s->compress != NULL)
1665                 {
1666                 COMP_CTX_free(s->compress);
1667                 s->compress=NULL;
1668                 }
1669         }
1670
1671 /* Fix this function so that it takes an optional type parameter */
1672 X509 *SSL_get_certificate(SSL *s)
1673         {
1674         if (s->cert != NULL)
1675                 return(s->cert->key->x509);
1676         else
1677                 return(NULL);
1678         }
1679
1680 /* Fix this function so that it takes an optional type parameter */
1681 EVP_PKEY *SSL_get_privatekey(SSL *s)
1682         {
1683         if (s->cert != NULL)
1684                 return(s->cert->key->privatekey);
1685         else
1686                 return(NULL);
1687         }
1688
1689 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1690         {
1691         if ((s->session != NULL) && (s->session->cipher != NULL))
1692                 return(s->session->cipher);
1693         return(NULL);
1694         }
1695
1696 int ssl_init_wbio_buffer(SSL *s,int push)
1697         {
1698         BIO *bbio;
1699
1700         if (s->bbio == NULL)
1701                 {
1702                 bbio=BIO_new(BIO_f_buffer());
1703                 if (bbio == NULL) return(0);
1704                 s->bbio=bbio;
1705                 }
1706         else
1707                 {
1708                 bbio=s->bbio;
1709                 if (s->bbio == s->wbio)
1710                         s->wbio=BIO_pop(s->wbio);
1711                 }
1712         (void)BIO_reset(bbio);
1713 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1714         if (!BIO_set_read_buffer_size(bbio,1))
1715                 {
1716                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1717                 return(0);
1718                 }
1719         if (push)
1720                 {
1721                 if (s->wbio != bbio)
1722                         s->wbio=BIO_push(bbio,s->wbio);
1723                 }
1724         else
1725                 {
1726                 if (s->wbio == bbio)
1727                         s->wbio=BIO_pop(bbio);
1728                 }
1729         return(1);
1730         }
1731
1732 void ssl_free_wbio_buffer(SSL *s)
1733         {
1734         BIO *under;
1735
1736         if (s->bbio == NULL) return;
1737
1738         if (s->bbio == s->wbio)
1739                 {
1740                 /* remove buffering */
1741                 under=BIO_pop(s->wbio);
1742                 if (under != NULL)
1743                         s->wbio=under;
1744                 else
1745                         abort(); /* ok */
1746                 }
1747         BIO_free(s->bbio);
1748         s->bbio=NULL;
1749         }
1750
1751 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1752         {
1753         ctx->quiet_shutdown=mode;
1754         }
1755
1756 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1757         {
1758         return(ctx->quiet_shutdown);
1759         }
1760
1761 void SSL_set_quiet_shutdown(SSL *s,int mode)
1762         {
1763         s->quiet_shutdown=mode;
1764         }
1765
1766 int SSL_get_quiet_shutdown(SSL *s)
1767         {
1768         return(s->quiet_shutdown);
1769         }
1770
1771 void SSL_set_shutdown(SSL *s,int mode)
1772         {
1773         s->shutdown=mode;
1774         }
1775
1776 int SSL_get_shutdown(SSL *s)
1777         {
1778         return(s->shutdown);
1779         }
1780
1781 int SSL_version(SSL *s)
1782         {
1783         return(s->version);
1784         }
1785
1786 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1787         {
1788         return(ssl->ctx);
1789         }
1790
1791 #ifndef NO_STDIO
1792 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1793         {
1794         return(X509_STORE_set_default_paths(ctx->cert_store));
1795         }
1796
1797 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
1798                 const char *CApath)
1799         {
1800         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1801         }
1802 #endif
1803
1804 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1805         {
1806         ssl->info_callback=cb;
1807         }
1808
1809 void (*SSL_get_info_callback(SSL *ssl))(void)
1810         {
1811         return((void (*)())ssl->info_callback);
1812         }
1813
1814 int SSL_state(SSL *ssl)
1815         {
1816         return(ssl->state);
1817         }
1818
1819 void SSL_set_verify_result(SSL *ssl,long arg)
1820         {
1821         ssl->verify_result=arg;
1822         }
1823
1824 long SSL_get_verify_result(SSL *ssl)
1825         {
1826         return(ssl->verify_result);
1827         }
1828
1829 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1830                          int (*dup_func)(),void (*free_func)())
1831         {
1832         ssl_meth_num++;
1833         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1834                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1835         }
1836
1837 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1838         {
1839         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1840         }
1841
1842 void *SSL_get_ex_data(SSL *s,int idx)
1843         {
1844         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1845         }
1846
1847 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1848                              int (*dup_func)(),void (*free_func)())
1849         {
1850         ssl_ctx_meth_num++;
1851         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1852                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1853         }
1854
1855 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1856         {
1857         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1858         }
1859
1860 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1861         {
1862         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1863         }
1864
1865 int ssl_ok(SSL *s)
1866         {
1867         return(1);
1868         }
1869
1870 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1871         {
1872         return(ctx->cert_store);
1873         }
1874
1875 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1876         {
1877         if (ctx->cert_store != NULL)
1878                 X509_STORE_free(ctx->cert_store);
1879         ctx->cert_store=store;
1880         }
1881
1882 int SSL_want(SSL *s)
1883         {
1884         return(s->rwstate);
1885         }
1886
1887 /*!
1888  * \brief Set the callback for generating temporary RSA keys.
1889  * \param ctx the SSL context.
1890  * \param cb the callback
1891  */
1892
1893 #ifndef NO_RSA
1894 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
1895                                                           int is_export,
1896                                                           int keylength))
1897     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1898 #endif
1899
1900 #ifndef NO_RSA
1901 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int is_export,
1902                                                           int keylength))
1903     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1904 #endif
1905
1906 #ifdef DOXYGEN
1907 /*!
1908  * \brief The RSA temporary key callback function.
1909  * \param ssl the SSL session.
1910  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
1911  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
1912  * of the required key in bits.
1913  * \return the temporary RSA key.
1914  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1915  */
1916
1917 RSA *cb(SSL *ssl,int is_export,int keylength)
1918     {}
1919 #endif
1920
1921 /*!
1922  * \brief Set the callback for generating temporary DH keys.
1923  * \param ctx the SSL context.
1924  * \param dh the callback
1925  */
1926
1927 #ifndef NO_DH
1928 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
1929                                                         int keylength))
1930     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1931
1932 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
1933                                                         int keylength))
1934     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1935 #endif
1936
1937 #if defined(_WINDLL) && defined(WIN16)
1938 #include "../crypto/bio/bss_file.c"
1939 #endif
1940
1941 IMPLEMENT_STACK_OF(SSL_CIPHER)
1942 IMPLEMENT_STACK_OF(SSL_COMP)