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
  62 #ifdef REF_CHECK
  63 #  include <assert.h>
  64 #endif
  65 #include <stdio.h>
  66 #include <openssl/objects.h>
  67 #include <openssl/lhash.h>
  68 #include <openssl/x509v3.h>
  69 #include "ssl_locl.h"
  70
  71 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
  72
  73 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *ssl_meth=NULL;
  74 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *ssl_ctx_meth=NULL;
  75 static int ssl_meth_num=0;
  76 static int ssl_ctx_meth_num=0;
  77
  78 OPENSSL_GLOBAL SSL3_ENC_METHOD ssl3_undef_enc_method={
  79         /* evil casts, but these functions are only called if there's a library bug */
  80         (int (*)(SSL *,int))ssl_undefined_function,
  81         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
  82         ssl_undefined_function,
  83         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
  84         (int (*)(SSL*, int))ssl_undefined_function,
  85         (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function
  86         };
  87
  88 int SSL_clear(SSL *s)
  89         {
  90         int state;
  91
  92         if (s->method == NULL)
  93                 {
  94                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
  95                 return(0);
  96                 }
  97
  98         s->error=0;
  99         s->hit=0;
 100         s->shutdown=0;
 101
 102 #if 0 /* Disabled since version 1.10 of this file (early return not
 103        * needed because SSL_clear is not called when doing renegotiation) */
 104         /* This is set if we are doing dynamic renegotiation so keep
 105          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 106         if (s->new_session) return(1);
 107 #else
 108         if (s->new_session)
 109                 {
 110                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 111                 return 0;
 112                 }
 113 #endif
 114
 115         state=s->state; /* Keep to check if we throw away the session-id */
 116         s->type=0;
 117
 118         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 119
 120         s->version=s->method->version;
 121         s->client_version=s->version;
 122         s->rwstate=SSL_NOTHING;
 123         s->rstate=SSL_ST_READ_HEADER;
 124 #if 0
 125         s->read_ahead=s->ctx->read_ahead;
 126 #endif
 127
 128         if (s->init_buf != NULL)
 129                 {
 130                 BUF_MEM_free(s->init_buf);
 131                 s->init_buf=NULL;
 132                 }
 133
 134         ssl_clear_cipher_ctx(s);
 135
 136         if (ssl_clear_bad_session(s))
 137                 {
 138                 SSL_SESSION_free(s->session);
 139                 s->session=NULL;
 140                 }
 141
 142         s->first_packet=0;
 143
 144 #if 1
 145         /* Check to see if we were changed into a different method, if
 146          * so, revert back if we are not doing session-id reuse. */
 147         if ((s->session == NULL) && (s->method != s->ctx->method))
 148                 {
 149                 s->method->ssl_free(s);
 150                 s->method=s->ctx->method;
 151                 if (!s->method->ssl_new(s))
 152                         return(0);
 153                 }
 154         else
 155 #endif
 156                 s->method->ssl_clear(s);
 157         return(1);
 158         }
 159
 160 /** Used to change an SSL_CTXs default SSL method type */
 161 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
 162         {
 163         STACK_OF(SSL_CIPHER) *sk;
 164
 165         ctx->method=meth;
 166
 167         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 168                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 169         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 170                 {
 171                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 172                 return(0);
 173                 }
 174         return(1);
 175         }
 176
 177 SSL *SSL_new(SSL_CTX *ctx)
 178         {
 179         SSL *s;
 180
 181         if (ctx == NULL)
 182                 {
 183                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 184                 return(NULL);
 185                 }
 186         if (ctx->method == NULL)
 187                 {
 188                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 189                 return(NULL);
 190                 }
 191
 192         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 193         if (s == NULL) goto err;
 194         memset(s,0,sizeof(SSL));
 195
 196 #ifndef OPENSSL_NO_KRB5
 197         s->kssl_ctx = kssl_ctx_new();
 198 #endif  /* OPENSSL_NO_KRB5 */
 199
 200         if (ctx->cert != NULL)
 201                 {
 202                 /* Earlier library versions used to copy the pointer to
 203                  * the CERT, not its contents; only when setting new
 204                  * parameters for the per-SSL copy, ssl_cert_new would be
 205                  * called (and the direct reference to the per-SSL_CTX
 206                  * settings would be lost, but those still were indirectly
 207                  * accessed for various purposes, and for that reason they
 208                  * used to be known as s->ctx->default_cert).
 209                  * Now we don't look at the SSL_CTX's CERT after having
 210                  * duplicated it once. */
 211
 212                 s->cert = ssl_cert_dup(ctx->cert);
 213                 if (s->cert == NULL)
 214                         goto err;
 215                 }
 216         else
 217                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 218         s->sid_ctx_length=ctx->sid_ctx_length;
 219         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 220         s->verify_mode=ctx->verify_mode;
 221         s->verify_depth=ctx->verify_depth;
 222         s->verify_callback=ctx->default_verify_callback;
 223         s->generate_session_id=ctx->generate_session_id;
 224         s->purpose = ctx->purpose;
 225         s->trust = ctx->trust;
 226         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 227         s->ctx=ctx;
 228
 229         s->verify_result=X509_V_OK;
 230
 231         s->method=ctx->method;
 232
 233         if (!s->method->ssl_new(s))
 234                 goto err;
 235
 236         s->quiet_shutdown=ctx->quiet_shutdown;
 237         s->references=1;
 238         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 239         s->options=ctx->options;
 240         s->mode=ctx->mode;
 241         s->read_ahead=ctx->read_ahead; /* used to happen in SSL_clear */
 242         SSL_clear(s);
 243
 244         CRYPTO_new_ex_data(ssl_meth,s,&s->ex_data);
 245
 246         return(s);
 247 err:
 248         if (s != NULL)
 249                 {
 250                 if (s->cert != NULL)
 251                         ssl_cert_free(s->cert);
 252                 if (s->ctx != NULL)
 253                         SSL_CTX_free(s->ctx); /* decrement reference count */
 254                 OPENSSL_free(s);
 255                 }
 256         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 257         return(NULL);
 258         }
 259
 260 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 261                                    unsigned int sid_ctx_len)
 262     {
 263     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 264         {
 265         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 266         return 0;
 267         }
 268     ctx->sid_ctx_length=sid_ctx_len;
 269     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 270
 271     return 1;
 272     }
 273
 274 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 275                                unsigned int sid_ctx_len)
 276     {
 277     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 278         {
 279         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 280         return 0;
 281         }
 282     ssl->sid_ctx_length=sid_ctx_len;
 283     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 284
 285     return 1;
 286     }
 287
 288 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 289         {
 290         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 291         ctx->generate_session_id = cb;
 292         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 293         return 1;
 294         }
 295
 296 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 297         {
 298         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 299         ssl->generate_session_id = cb;
 300         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 301         return 1;
 302         }
 303
 304 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 305                                 unsigned int id_len)
 306         {
 307         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 308          * we can "construct" a session to give us the desired check - ie. to
 309          * find if there's a session in the hash table that would conflict with
 310          * any new session built out of this id/id_len and the ssl_version in
 311          * use by this SSL. */
 312         SSL_SESSION r, *p;
 313         r.ssl_version = ssl->version;
 314         r.session_id_length = id_len;
 315         memcpy(r.session_id, id, id_len);
 316         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 317          * callback is calling us to check the uniqueness of a shorter ID, it
 318          * must be compared as a padded-out ID because that is what it will be
 319          * converted to when the callback has finished choosing it. */
 320         if((r.ssl_version == SSL2_VERSION) &&
 321                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 322                 {
 323                 memset(r.session_id + id_len, 0,
 324                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 325                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 326                 }
 327
 328         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 329         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
 330         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 331         return (p != NULL);
 332         }
 333
 334 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 335 {
 336         return X509_PURPOSE_set(&s->purpose, purpose);
 337 }
 338
 339 int SSL_set_purpose(SSL *s, int purpose)
 340 {
 341         return X509_PURPOSE_set(&s->purpose, purpose);
 342 }
 343
 344 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 345 {
 346         return X509_TRUST_set(&s->trust, trust);
 347 }
 348
 349 int SSL_set_trust(SSL *s, int trust)
 350 {
 351         return X509_TRUST_set(&s->trust, trust);
 352 }
 353
 354 void SSL_free(SSL *s)
 355         {
 356         int i;
 357
 358         if(s == NULL)
 359             return;
 360
 361         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 362 #ifdef REF_PRINT
 363         REF_PRINT("SSL",s);
 364 #endif
 365         if (i > 0) return;
 366 #ifdef REF_CHECK
 367         if (i < 0)
 368                 {
 369                 fprintf(stderr,"SSL_free, bad reference count\n");
 370                 abort(); /* ok */
 371                 }
 372 #endif
 373
 374         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 375
 376         if (s->bbio != NULL)
 377                 {
 378                 /* If the buffering BIO is in place, pop it off */
 379                 if (s->bbio == s->wbio)
 380                         {
 381                         s->wbio=BIO_pop(s->wbio);
 382                         }
 383                 BIO_free(s->bbio);
 384                 s->bbio=NULL;
 385                 }
 386         if (s->rbio != NULL)
 387                 BIO_free_all(s->rbio);
 388         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 389                 BIO_free_all(s->wbio);
 390
 391         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 392
 393         /* add extra stuff */
 394         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 395         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 396
 397         /* Make the next call work :-) */
 398         if (s->session != NULL)
 399                 {
 400                 ssl_clear_bad_session(s);
 401                 SSL_SESSION_free(s->session);
 402                 }
 403
 404         ssl_clear_cipher_ctx(s);
 405
 406         if (s->cert != NULL) ssl_cert_free(s->cert);
 407         /* Free up if allocated */
 408
 409         if (s->ctx) SSL_CTX_free(s->ctx);
 410
 411         if (s->client_CA != NULL)
 412                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 413
 414         if (s->method != NULL) s->method->ssl_free(s);
 415
 416         OPENSSL_free(s);
 417         }
 418
 419 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 420         {
 421         /* If the output buffering BIO is still in place, remove it
 422          */
 423         if (s->bbio != NULL)
 424                 {
 425                 if (s->wbio == s->bbio)
 426                         {
 427                         s->wbio=s->wbio->next_bio;
 428                         s->bbio->next_bio=NULL;
 429                         }
 430                 }
 431         if ((s->rbio != NULL) && (s->rbio != rbio))
 432                 BIO_free_all(s->rbio);
 433         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 434                 BIO_free_all(s->wbio);
 435         s->rbio=rbio;
 436         s->wbio=wbio;
 437         }
 438
 439 BIO *SSL_get_rbio(SSL *s)
 440         { return(s->rbio); }
 441
 442 BIO *SSL_get_wbio(SSL *s)
 443         { return(s->wbio); }
 444
 445 int SSL_get_fd(SSL *s)
 446         {
 447         int ret= -1;
 448         BIO *b,*r;
 449
 450         b=SSL_get_rbio(s);
 451         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 452         if (r != NULL)
 453                 BIO_get_fd(r,&ret);
 454         return(ret);
 455         }
 456
 457 #ifndef OPENSSL_NO_SOCK
 458 int SSL_set_fd(SSL *s,int fd)
 459         {
 460         int ret=0;
 461         BIO *bio=NULL;
 462
 463         bio=BIO_new(BIO_s_socket());
 464
 465         if (bio == NULL)
 466                 {
 467                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 468                 goto err;
 469                 }
 470         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 471         SSL_set_bio(s,bio,bio);
 472         ret=1;
 473 err:
 474         return(ret);
 475         }
 476
 477 int SSL_set_wfd(SSL *s,int fd)
 478         {
 479         int ret=0;
 480         BIO *bio=NULL;
 481
 482         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 483                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 484                 {
 485                 bio=BIO_new(BIO_s_socket());
 486
 487                 if (bio == NULL)
 488                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 489                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 490                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 491                 }
 492         else
 493                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 494         ret=1;
 495 err:
 496         return(ret);
 497         }
 498
 499 int SSL_set_rfd(SSL *s,int fd)
 500         {
 501         int ret=0;
 502         BIO *bio=NULL;
 503
 504         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 505                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 506                 {
 507                 bio=BIO_new(BIO_s_socket());
 508
 509                 if (bio == NULL)
 510                         {
 511                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 512                         goto err;
 513                         }
 514                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 515                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 516                 }
 517         else
 518                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 519         ret=1;
 520 err:
 521         return(ret);
 522         }
 523 #endif
 524
 525
 526 /* return length of latest Finished message we sent, copy to 'buf' */
 527 size_t SSL_get_finished(SSL *s, void *buf, size_t count)
 528         {
 529         size_t ret = 0;
 530
 531         if (s->s3 != NULL)
 532                 {
 533                 ret = s->s3->tmp.finish_md_len;
 534                 if (count > ret)
 535                         count = ret;
 536                 memcpy(buf, s->s3->tmp.finish_md, count);
 537                 }
 538         return ret;
 539         }
 540
 541 /* return length of latest Finished message we expected, copy to 'buf' */
 542 size_t SSL_get_peer_finished(SSL *s, void *buf, size_t count)
 543         {
 544         size_t ret = 0;
 545
 546         if (s->s3 != NULL)
 547                 {
 548                 ret = s->s3->tmp.peer_finish_md_len;
 549                 if (count > ret)
 550                         count = ret;
 551                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 552                 }
 553         return ret;
 554         }
 555
 556
 557 int SSL_get_verify_mode(SSL *s)
 558         {
 559         return(s->verify_mode);
 560         }
 561
 562 int SSL_get_verify_depth(SSL *s)
 563         {
 564         return(s->verify_depth);
 565         }
 566
 567 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
 568         {
 569         return(s->verify_callback);
 570         }
 571
 572 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
 573         {
 574         return(ctx->verify_mode);
 575         }
 576
 577 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
 578         {
 579         return(ctx->verify_depth);
 580         }
 581
 582 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
 583         {
 584         return(ctx->default_verify_callback);
 585         }
 586
 587 void SSL_set_verify(SSL *s,int mode,
 588                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 589         {
 590         s->verify_mode=mode;
 591         if (callback != NULL)
 592                 s->verify_callback=callback;
 593         }
 594
 595 void SSL_set_verify_depth(SSL *s,int depth)
 596         {
 597         s->verify_depth=depth;
 598         }
 599
 600 void SSL_set_read_ahead(SSL *s,int yes)
 601         {
 602         s->read_ahead=yes;
 603         }
 604
 605 int SSL_get_read_ahead(SSL *s)
 606         {
 607         return(s->read_ahead);
 608         }
 609
 610 int SSL_pending(SSL *s)
 611         {
 612         /* SSL_pending cannot work properly if read-ahead is enabled
 613          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 614          * and it is impossible to fix since SSL_pending cannot report
 615          * errors that may be observed while scanning the new data.
 616          * (Note that SSL_pending() is often used as a boolean value,
 617          * so we'd better not return -1.)
 618          */
 619         return(s->method->ssl_pending(s));
 620         }
 621
 622 X509 *SSL_get_peer_certificate(SSL *s)
 623         {
 624         X509 *r;
 625
 626         if ((s == NULL) || (s->session == NULL))
 627                 r=NULL;
 628         else
 629                 r=s->session->peer;
 630
 631         if (r == NULL) return(r);
 632
 633         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 634
 635         return(r);
 636         }
 637
 638 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
 639         {
 640         STACK_OF(X509) *r;
 641
 642         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 643                 r=NULL;
 644         else
 645                 r=s->session->sess_cert->cert_chain;
 646
 647         /* If we are a client, cert_chain includes the peer's own
 648          * certificate; if we are a server, it does not. */
 649
 650         return(r);
 651         }
 652
 653 /* Now in theory, since the calling process own 't' it should be safe to
 654  * modify.  We need to be able to read f without being hassled */
 655 void SSL_copy_session_id(SSL *t,SSL *f)
 656         {
 657         CERT *tmp;
 658
 659         /* Do we need to to SSL locking? */
 660         SSL_set_session(t,SSL_get_session(f));
 661
 662         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 663          * vice-versa */
 664         if (t->method != f->method)
 665                 {
 666                 t->method->ssl_free(t); /* cleanup current */
 667                 t->method=f->method;    /* change method */
 668                 t->method->ssl_new(t);  /* setup new */
 669                 }
 670
 671         tmp=t->cert;
 672         if (f->cert != NULL)
 673                 {
 674                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 675                 t->cert=f->cert;
 676                 }
 677         else
 678                 t->cert=NULL;
 679         if (tmp != NULL) ssl_cert_free(tmp);
 680         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 681         }
 682
 683 /* Fix this so it checks all the valid key/cert options */
 684 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 685         {
 686         if (    (ctx == NULL) ||
 687                 (ctx->cert == NULL) ||
 688                 (ctx->cert->key->x509 == NULL))
 689                 {
 690                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 691                 return(0);
 692                 }
 693         if      (ctx->cert->key->privatekey == NULL)
 694                 {
 695                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 696                 return(0);
 697                 }
 698         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 699         }
 700
 701 /* Fix this function so that it takes an optional type parameter */
 702 int SSL_check_private_key(SSL *ssl)
 703         {
 704         if (ssl == NULL)
 705                 {
 706                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 707                 return(0);
 708                 }
 709         if (ssl->cert == NULL)
 710                 {
 711                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 712                 return 0;
 713                 }
 714         if (ssl->cert->key->x509 == NULL)
 715                 {
 716                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 717                 return(0);
 718                 }
 719         if (ssl->cert->key->privatekey == NULL)
 720                 {
 721                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 722                 return(0);
 723                 }
 724         return(X509_check_private_key(ssl->cert->key->x509,
 725                 ssl->cert->key->privatekey));
 726         }
 727
 728 int SSL_accept(SSL *s)
 729         {
 730         if (s->handshake_func == 0)
 731                 /* Not properly initialized yet */
 732                 SSL_set_accept_state(s);
 733
 734         return(s->method->ssl_accept(s));
 735         }
 736
 737 int SSL_connect(SSL *s)
 738         {
 739         if (s->handshake_func == 0)
 740                 /* Not properly initialized yet */
 741                 SSL_set_connect_state(s);
 742
 743         return(s->method->ssl_connect(s));
 744         }
 745
 746 long SSL_get_default_timeout(SSL *s)
 747         {
 748         return(s->method->get_timeout());
 749         }
 750
 751 int SSL_read(SSL *s,void *buf,int num)
 752         {
 753         if (s->handshake_func == 0)
 754                 {
 755                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 756                 return -1;
 757                 }
 758
 759         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 760                 {
 761                 s->rwstate=SSL_NOTHING;
 762                 return(0);
 763                 }
 764         return(s->method->ssl_read(s,buf,num));
 765         }
 766
 767 int SSL_peek(SSL *s,void *buf,int num)
 768         {
 769         if (s->handshake_func == 0)
 770                 {
 771                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 772                 return -1;
 773                 }
 774
 775         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 776                 {
 777                 return(0);
 778                 }
 779         return(s->method->ssl_peek(s,buf,num));
 780         }
 781
 782 int SSL_write(SSL *s,const void *buf,int num)
 783         {
 784         if (s->handshake_func == 0)
 785                 {
 786                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 787                 return -1;
 788                 }
 789
 790         if (s->shutdown & SSL_SENT_SHUTDOWN)
 791                 {
 792                 s->rwstate=SSL_NOTHING;
 793                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 794                 return(-1);
 795                 }
 796         return(s->method->ssl_write(s,buf,num));
 797         }
 798
 799 int SSL_shutdown(SSL *s)
 800         {
 801         /* Note that this function behaves differently from what one might
 802          * expect.  Return values are 0 for no success (yet),
 803          * 1 for success; but calling it once is usually not enough,
 804          * even if blocking I/O is used (see ssl3_shutdown).
 805          */
 806
 807         if (s->handshake_func == 0)
 808                 {
 809                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 810                 return -1;
 811                 }
 812
 813         if ((s != NULL) && !SSL_in_init(s))
 814                 return(s->method->ssl_shutdown(s));
 815         else
 816                 return(1);
 817         }
 818
 819 int SSL_renegotiate(SSL *s)
 820         {
 821         s->new_session=1;
 822         return(s->method->ssl_renegotiate(s));
 823         }
 824
 825 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 826         {
 827         long l;
 828
 829         switch (cmd)
 830                 {
 831         case SSL_CTRL_GET_READ_AHEAD:
 832                 return(s->read_ahead);
 833         case SSL_CTRL_SET_READ_AHEAD:
 834                 l=s->read_ahead;
 835                 s->read_ahead=larg;
 836                 return(l);
 837         case SSL_CTRL_OPTIONS:
 838                 return(s->options|=larg);
 839         case SSL_CTRL_MODE:
 840                 return(s->mode|=larg);
 841         default:
 842                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 843                 }
 844         }
 845
 846 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)())
 847         {
 848         switch(cmd)
 849                 {
 850         default:
 851                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
 852                 }
 853         }
 854
 855 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
 856         {
 857         return ctx->sessions;
 858         }
 859
 860 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 861         {
 862         long l;
 863
 864         switch (cmd)
 865                 {
 866         case SSL_CTRL_GET_READ_AHEAD:
 867                 return(ctx->read_ahead);
 868         case SSL_CTRL_SET_READ_AHEAD:
 869                 l=ctx->read_ahead;
 870                 ctx->read_ahead=larg;
 871                 return(l);
 872
 873         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 874                 l=ctx->session_cache_size;
 875                 ctx->session_cache_size=larg;
 876                 return(l);
 877         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 878                 return(ctx->session_cache_size);
 879         case SSL_CTRL_SET_SESS_CACHE_MODE:
 880                 l=ctx->session_cache_mode;
 881                 ctx->session_cache_mode=larg;
 882                 return(l);
 883         case SSL_CTRL_GET_SESS_CACHE_MODE:
 884                 return(ctx->session_cache_mode);
 885
 886         case SSL_CTRL_SESS_NUMBER:
 887                 return(ctx->sessions->num_items);
 888         case SSL_CTRL_SESS_CONNECT:
 889                 return(ctx->stats.sess_connect);
 890         case SSL_CTRL_SESS_CONNECT_GOOD:
 891                 return(ctx->stats.sess_connect_good);
 892         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 893                 return(ctx->stats.sess_connect_renegotiate);
 894         case SSL_CTRL_SESS_ACCEPT:
 895                 return(ctx->stats.sess_accept);
 896         case SSL_CTRL_SESS_ACCEPT_GOOD:
 897                 return(ctx->stats.sess_accept_good);
 898         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 899                 return(ctx->stats.sess_accept_renegotiate);
 900         case SSL_CTRL_SESS_HIT:
 901                 return(ctx->stats.sess_hit);
 902         case SSL_CTRL_SESS_CB_HIT:
 903                 return(ctx->stats.sess_cb_hit);
 904         case SSL_CTRL_SESS_MISSES:
 905                 return(ctx->stats.sess_miss);
 906         case SSL_CTRL_SESS_TIMEOUTS:
 907                 return(ctx->stats.sess_timeout);
 908         case SSL_CTRL_SESS_CACHE_FULL:
 909                 return(ctx->stats.sess_cache_full);
 910         case SSL_CTRL_OPTIONS:
 911                 return(ctx->options|=larg);
 912         case SSL_CTRL_MODE:
 913                 return(ctx->mode|=larg);
 914         default:
 915                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 916                 }
 917         }
 918
 919 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
 920         {
 921         switch(cmd)
 922                 {
 923         default:
 924                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
 925                 }
 926         }
 927
 928 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
 929         {
 930         long l;
 931
 932         l=a->id-b->id;
 933         if (l == 0L)
 934                 return(0);
 935         else
 936                 return((l > 0)?1:-1);
 937         }
 938
 939 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
 940                         const SSL_CIPHER * const *bp)
 941         {
 942         long l;
 943
 944         l=(*ap)->id-(*bp)->id;
 945         if (l == 0L)
 946                 return(0);
 947         else
 948                 return((l > 0)?1:-1);
 949         }
 950
 951 /** return a STACK of the ciphers available for the SSL and in order of
 952  * preference */
 953 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 954         {
 955         if ((s != NULL) && (s->cipher_list != NULL))
 956                 {
 957                 return(s->cipher_list);
 958                 }
 959         else if ((s->ctx != NULL) &&
 960                 (s->ctx->cipher_list != NULL))
 961                 {
 962                 return(s->ctx->cipher_list);
 963                 }
 964         return(NULL);
 965         }
 966
 967 /** return a STACK of the ciphers available for the SSL and in order of
 968  * algorithm id */
 969 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 970         {
 971         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 972                 {
 973                 return(s->cipher_list_by_id);
 974                 }
 975         else if ((s != NULL) && (s->ctx != NULL) &&
 976                 (s->ctx->cipher_list_by_id != NULL))
 977                 {
 978                 return(s->ctx->cipher_list_by_id);
 979                 }
 980         return(NULL);
 981         }
 982
 983 /** The old interface to get the same thing as SSL_get_ciphers() */
 984 const char *SSL_get_cipher_list(SSL *s,int n)
 985         {
 986         SSL_CIPHER *c;
 987         STACK_OF(SSL_CIPHER) *sk;
 988
 989         if (s == NULL) return(NULL);
 990         sk=SSL_get_ciphers(s);
 991         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 992                 return(NULL);
 993         c=sk_SSL_CIPHER_value(sk,n);
 994         if (c == NULL) return(NULL);
 995         return(c->name);
 996         }
 997
 998 /** specify the ciphers to be used by default by the SSL_CTX */
 999 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1000         {
1001         STACK_OF(SSL_CIPHER) *sk;
1002
1003         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1004                 &ctx->cipher_list_by_id,str);
1005 /* XXXX */
1006         return((sk == NULL)?0:1);
1007         }
1008
1009 /** specify the ciphers to be used by the SSL */
1010 int SSL_set_cipher_list(SSL *s,const char *str)
1011         {
1012         STACK_OF(SSL_CIPHER) *sk;
1013
1014         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1015                 &s->cipher_list_by_id,str);
1016 /* XXXX */
1017         return((sk == NULL)?0:1);
1018         }
1019
1020 /* works well for SSLv2, not so good for SSLv3 */
1021 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
1022         {
1023         char *p;
1024         const char *cp;
1025         STACK_OF(SSL_CIPHER) *sk;
1026         SSL_CIPHER *c;
1027         int i;
1028
1029         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1030                 (len < 2))
1031                 return(NULL);
1032
1033         p=buf;
1034         sk=s->session->ciphers;
1035         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1036                 {
1037                 /* Decrement for either the ':' or a '\0' */
1038                 len--;
1039                 c=sk_SSL_CIPHER_value(sk,i);
1040                 for (cp=c->name; *cp; )
1041                         {
1042                         if (len-- == 0)
1043                                 {
1044                                 *p='\0';
1045                                 return(buf);
1046                                 }
1047                         else
1048                                 *(p++)= *(cp++);
1049                         }
1050                 *(p++)=':';
1051                 }
1052         p[-1]='\0';
1053         return(buf);
1054         }
1055
1056 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
1057         {
1058         int i,j=0;
1059         SSL_CIPHER *c;
1060         unsigned char *q;
1061 #ifndef OPENSSL_NO_KRB5
1062         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1063 #endif /* OPENSSL_NO_KRB5 */
1064
1065         if (sk == NULL) return(0);
1066         q=p;
1067
1068         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1069                 {
1070                 c=sk_SSL_CIPHER_value(sk,i);
1071 #ifndef OPENSSL_NO_KRB5
1072                 if ((c->algorithms & SSL_KRB5) && nokrb5)
1073                     continue;
1074 #endif /* OPENSSL_NO_KRB5 */
1075                 j=ssl_put_cipher_by_char(s,c,p);
1076                 p+=j;
1077                 }
1078         return(p-q);
1079         }
1080
1081 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1082                                                STACK_OF(SSL_CIPHER) **skp)
1083         {
1084         SSL_CIPHER *c;
1085         STACK_OF(SSL_CIPHER) *sk;
1086         int i,n;
1087
1088         n=ssl_put_cipher_by_char(s,NULL,NULL);
1089         if ((num%n) != 0)
1090                 {
1091                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1092                 return(NULL);
1093                 }
1094         if ((skp == NULL) || (*skp == NULL))
1095                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1096         else
1097                 {
1098                 sk= *skp;
1099                 sk_SSL_CIPHER_zero(sk);
1100                 }
1101
1102         for (i=0; i<num; i+=n)
1103                 {
1104                 c=ssl_get_cipher_by_char(s,p);
1105                 p+=n;
1106                 if (c != NULL)
1107                         {
1108                         if (!sk_SSL_CIPHER_push(sk,c))
1109                                 {
1110                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1111                                 goto err;
1112                                 }
1113                         }
1114                 }
1115
1116         if (skp != NULL)
1117                 *skp=sk;
1118         return(sk);
1119 err:
1120         if ((skp == NULL) || (*skp == NULL))
1121                 sk_SSL_CIPHER_free(sk);
1122         return(NULL);
1123         }
1124
1125 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
1126         {
1127         unsigned long l;
1128
1129         l=(unsigned long)
1130                 ((unsigned int) a->session_id[0]     )|
1131                 ((unsigned int) a->session_id[1]<< 8L)|
1132                 ((unsigned long)a->session_id[2]<<16L)|
1133                 ((unsigned long)a->session_id[3]<<24L);
1134         return(l);
1135         }
1136
1137 /* NB: If this function (or indeed the hash function which uses a sort of
1138  * coarser function than this one) is changed, ensure
1139  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1140  * able to construct an SSL_SESSION that will collide with any existing session
1141  * with a matching session ID. */
1142 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
1143         {
1144         if (a->ssl_version != b->ssl_version)
1145                 return(1);
1146         if (a->session_id_length != b->session_id_length)
1147                 return(1);
1148         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1149         }
1150
1151 /* These wrapper functions should remain rather than redeclaring
1152  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1153  * variable. The reason is that the functions aren't static, they're exposed via
1154  * ssl.h. */
1155 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1156 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1157
1158 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1159         {
1160         SSL_CTX *ret=NULL;
1161
1162         if (meth == NULL)
1163                 {
1164                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1165                 return(NULL);
1166                 }
1167
1168         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1169                 {
1170                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1171                 goto err;
1172                 }
1173         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1174         if (ret == NULL)
1175                 goto err;
1176
1177         memset(ret,0,sizeof(SSL_CTX));
1178
1179         ret->method=meth;
1180
1181         ret->cert_store=NULL;
1182         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1183         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1184         ret->session_cache_head=NULL;
1185         ret->session_cache_tail=NULL;
1186
1187         /* We take the system default */
1188         ret->session_timeout=meth->get_timeout();
1189
1190         ret->new_session_cb=NULL;
1191         ret->remove_session_cb=NULL;
1192         ret->get_session_cb=NULL;
1193         ret->generate_session_id=NULL;
1194
1195         memset((char *)&ret->stats,0,sizeof(ret->stats));
1196
1197         ret->references=1;
1198         ret->quiet_shutdown=0;
1199
1200 /*      ret->cipher=NULL;*/
1201 /*      ret->s2->challenge=NULL;
1202         ret->master_key=NULL;
1203         ret->key_arg=NULL;
1204         ret->s2->conn_id=NULL; */
1205
1206         ret->info_callback=NULL;
1207
1208         ret->app_verify_callback=NULL;
1209         ret->app_verify_arg=NULL;
1210
1211         ret->read_ahead=0;
1212         ret->verify_mode=SSL_VERIFY_NONE;
1213         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1214         ret->default_verify_callback=NULL;
1215         if ((ret->cert=ssl_cert_new()) == NULL)
1216                 goto err;
1217
1218         ret->default_passwd_callback=NULL;
1219         ret->default_passwd_callback_userdata=NULL;
1220         ret->client_cert_cb=NULL;
1221
1222         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1223                         LHASH_COMP_FN(SSL_SESSION_cmp));
1224         if (ret->sessions == NULL) goto err;
1225         ret->cert_store=X509_STORE_new();
1226         if (ret->cert_store == NULL) goto err;
1227
1228         ssl_create_cipher_list(ret->method,
1229                 &ret->cipher_list,&ret->cipher_list_by_id,
1230                 SSL_DEFAULT_CIPHER_LIST);
1231         if (ret->cipher_list == NULL
1232             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1233                 {
1234                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1235                 goto err2;
1236                 }
1237
1238         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1239                 {
1240                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1241                 goto err2;
1242                 }
1243         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1244                 {
1245                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1246                 goto err2;
1247                 }
1248         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1249                 {
1250                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1251                 goto err2;
1252                 }
1253
1254         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1255                 goto err;
1256
1257         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1258
1259         ret->extra_certs=NULL;
1260         ret->comp_methods=SSL_COMP_get_compression_methods();
1261
1262         return(ret);
1263 err:
1264         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1265 err2:
1266         if (ret != NULL) SSL_CTX_free(ret);
1267         return(NULL);
1268         }
1269
1270 #if 0
1271 static void SSL_COMP_free(SSL_COMP *comp)
1272     { OPENSSL_free(comp); }
1273 #endif
1274
1275 void SSL_CTX_free(SSL_CTX *a)
1276         {
1277         int i;
1278
1279         if (a == NULL) return;
1280
1281         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1282 #ifdef REF_PRINT
1283         REF_PRINT("SSL_CTX",a);
1284 #endif
1285         if (i > 0) return;
1286 #ifdef REF_CHECK
1287         if (i < 0)
1288                 {
1289                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1290                 abort(); /* ok */
1291                 }
1292 #endif
1293         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1294
1295         if (a->sessions != NULL)
1296                 {
1297                 SSL_CTX_flush_sessions(a,0);
1298                 lh_free(a->sessions);
1299                 }
1300         if (a->cert_store != NULL)
1301                 X509_STORE_free(a->cert_store);
1302         if (a->cipher_list != NULL)
1303                 sk_SSL_CIPHER_free(a->cipher_list);
1304         if (a->cipher_list_by_id != NULL)
1305                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1306         if (a->cert != NULL)
1307                 ssl_cert_free(a->cert);
1308         if (a->client_CA != NULL)
1309                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1310         if (a->extra_certs != NULL)
1311                 sk_X509_pop_free(a->extra_certs,X509_free);
1312 #if 0 /* This should never be done, since it removes a global database */
1313         if (a->comp_methods != NULL)
1314                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1315 #else
1316         a->comp_methods = NULL;
1317 #endif
1318         OPENSSL_free(a);
1319         }
1320
1321 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1322         {
1323         ctx->default_passwd_callback=cb;
1324         }
1325
1326 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1327         {
1328         ctx->default_passwd_callback_userdata=u;
1329         }
1330
1331 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
1332         {
1333         /* now
1334          *     int (*cb)(X509_STORE_CTX *),
1335          * but should be
1336          *     int (*cb)(X509_STORE_CTX *, void *arg)
1337          */
1338         ctx->app_verify_callback=cb;
1339         ctx->app_verify_arg=arg; /* never used */
1340         }
1341
1342 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1343         {
1344         ctx->verify_mode=mode;
1345         ctx->default_verify_callback=cb;
1346         /* This needs cleaning up EAY EAY EAY */
1347         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1348         }
1349
1350 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1351         {
1352         ctx->verify_depth=depth;
1353         }
1354
1355 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1356         {
1357         CERT_PKEY *cpk;
1358         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1359         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1360         int rsa_tmp_export,dh_tmp_export,kl;
1361         unsigned long mask,emask;
1362
1363         if (c == NULL) return;
1364
1365         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1366
1367 #ifndef OPENSSL_NO_RSA
1368         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1369         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1370                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1371 #else
1372         rsa_tmp=rsa_tmp_export=0;
1373 #endif
1374 #ifndef OPENSSL_NO_DH
1375         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1376         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1377                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1378 #else
1379         dh_tmp=dh_tmp_export=0;
1380 #endif
1381
1382         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1383         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1384         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1385         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1386         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1387         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1388         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1389         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1390         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1391         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1392         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1393 /* FIX THIS EAY EAY EAY */
1394         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1395         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1396
1397         mask=0;
1398         emask=0;
1399
1400 #ifdef CIPHER_DEBUG
1401         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1402                 rsa_tmp,rsa_tmp_export,dh_tmp,
1403                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1404 #endif
1405
1406         if (rsa_enc || (rsa_tmp && rsa_sign))
1407                 mask|=SSL_kRSA;
1408         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1409                 emask|=SSL_kRSA;
1410
1411 #if 0
1412         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1413         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1414                 (rsa_enc || rsa_sign || dsa_sign))
1415                 mask|=SSL_kEDH;
1416         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1417                 (rsa_enc || rsa_sign || dsa_sign))
1418                 emask|=SSL_kEDH;
1419 #endif
1420
1421         if (dh_tmp_export)
1422                 emask|=SSL_kEDH;
1423
1424         if (dh_tmp)
1425                 mask|=SSL_kEDH;
1426
1427         if (dh_rsa) mask|=SSL_kDHr;
1428         if (dh_rsa_export) emask|=SSL_kDHr;
1429
1430         if (dh_dsa) mask|=SSL_kDHd;
1431         if (dh_dsa_export) emask|=SSL_kDHd;
1432
1433         if (rsa_enc || rsa_sign)
1434                 {
1435                 mask|=SSL_aRSA;
1436                 emask|=SSL_aRSA;
1437                 }
1438
1439         if (dsa_sign)
1440                 {
1441                 mask|=SSL_aDSS;
1442                 emask|=SSL_aDSS;
1443                 }
1444
1445         mask|=SSL_aNULL;
1446         emask|=SSL_aNULL;
1447
1448 #ifndef OPENSSL_NO_KRB5
1449         mask|=SSL_kKRB5|SSL_aKRB5;
1450         emask|=SSL_kKRB5|SSL_aKRB5;
1451 #endif
1452
1453         c->mask=mask;
1454         c->export_mask=emask;
1455         c->valid=1;
1456         }
1457
1458 /* THIS NEEDS CLEANING UP */
1459 X509 *ssl_get_server_send_cert(SSL *s)
1460         {
1461         unsigned long alg,mask,kalg;
1462         CERT *c;
1463         int i,is_export;
1464
1465         c=s->cert;
1466         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1467         alg=s->s3->tmp.new_cipher->algorithms;
1468         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1469         mask=is_export?c->export_mask:c->mask;
1470         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1471
1472         if      (kalg & SSL_kDHr)
1473                 i=SSL_PKEY_DH_RSA;
1474         else if (kalg & SSL_kDHd)
1475                 i=SSL_PKEY_DH_DSA;
1476         else if (kalg & SSL_aDSS)
1477                 i=SSL_PKEY_DSA_SIGN;
1478         else if (kalg & SSL_aRSA)
1479                 {
1480                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1481                         i=SSL_PKEY_RSA_SIGN;
1482                 else
1483                         i=SSL_PKEY_RSA_ENC;
1484                 }
1485         else if (kalg & SSL_aKRB5)
1486                 {
1487                 /* VRS something else here? */
1488                 return(NULL);
1489                 }
1490         else /* if (kalg & SSL_aNULL) */
1491                 {
1492                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
1493                 return(NULL);
1494                 }
1495         if (c->pkeys[i].x509 == NULL) return(NULL);
1496         return(c->pkeys[i].x509);
1497         }
1498
1499 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1500         {
1501         unsigned long alg;
1502         CERT *c;
1503
1504         alg=cipher->algorithms;
1505         c=s->cert;
1506
1507         if ((alg & SSL_aDSS) &&
1508                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1509                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1510         else if (alg & SSL_aRSA)
1511                 {
1512                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1513                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1514                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1515                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1516                 else
1517                         return(NULL);
1518                 }
1519         else /* if (alg & SSL_aNULL) */
1520                 {
1521                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
1522                 return(NULL);
1523                 }
1524         }
1525
1526 void ssl_update_cache(SSL *s,int mode)
1527         {
1528         int i;
1529
1530         /* If the session_id_length is 0, we are not supposed to cache it,
1531          * and it would be rather hard to do anyway :-) */
1532         if (s->session->session_id_length == 0) return;
1533
1534         if ((s->ctx->session_cache_mode & mode)
1535                 && (!s->hit)
1536                 && SSL_CTX_add_session(s->ctx,s->session)
1537                 && (s->ctx->new_session_cb != NULL))
1538                 {
1539                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1540                 if (!s->ctx->new_session_cb(s,s->session))
1541                         SSL_SESSION_free(s->session);
1542                 }
1543
1544         /* auto flush every 255 connections */
1545         i=s->ctx->session_cache_mode;
1546         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1547                 ((i & mode) == mode))
1548                 {
1549                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1550                         ?s->ctx->stats.sess_connect_good
1551                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1552                         {
1553                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1554                         }
1555                 }
1556         }
1557
1558 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1559         {
1560         return(s->method);
1561         }
1562
1563 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1564         {
1565         int conn= -1;
1566         int ret=1;
1567
1568         if (s->method != meth)
1569                 {
1570                 if (s->handshake_func != NULL)
1571                         conn=(s->handshake_func == s->method->ssl_connect);
1572
1573                 if (s->method->version == meth->version)
1574                         s->method=meth;
1575                 else
1576                         {
1577                         s->method->ssl_free(s);
1578                         s->method=meth;
1579                         ret=s->method->ssl_new(s);
1580                         }
1581
1582                 if (conn == 1)
1583                         s->handshake_func=meth->ssl_connect;
1584                 else if (conn == 0)
1585                         s->handshake_func=meth->ssl_accept;
1586                 }
1587         return(ret);
1588         }
1589
1590 int SSL_get_error(SSL *s,int i)
1591         {
1592         int reason;
1593         unsigned long l;
1594         BIO *bio;
1595
1596         if (i > 0) return(SSL_ERROR_NONE);
1597
1598         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1599          * etc, where we do encode the error */
1600         if ((l=ERR_peek_error()) != 0)
1601                 {
1602                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1603                         return(SSL_ERROR_SYSCALL);
1604                 else
1605                         return(SSL_ERROR_SSL);
1606                 }
1607
1608         if ((i < 0) && SSL_want_read(s))
1609                 {
1610                 bio=SSL_get_rbio(s);
1611                 if (BIO_should_read(bio))
1612                         return(SSL_ERROR_WANT_READ);
1613                 else if (BIO_should_write(bio))
1614                         /* This one doesn't make too much sense ... We never try
1615                          * to write to the rbio, and an application program where
1616                          * rbio and wbio are separate couldn't even know what it
1617                          * should wait for.
1618                          * However if we ever set s->rwstate incorrectly
1619                          * (so that we have SSL_want_read(s) instead of
1620                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1621                          * this test works around that bug; so it might be safer
1622                          * to keep it. */
1623                         return(SSL_ERROR_WANT_WRITE);
1624                 else if (BIO_should_io_special(bio))
1625                         {
1626                         reason=BIO_get_retry_reason(bio);
1627                         if (reason == BIO_RR_CONNECT)
1628                                 return(SSL_ERROR_WANT_CONNECT);
1629                         else if (reason == BIO_RR_ACCEPT)
1630                                 return(SSL_ERROR_WANT_ACCEPT);
1631                         else
1632                                 return(SSL_ERROR_SYSCALL); /* unknown */
1633                         }
1634                 }
1635
1636         if ((i < 0) && SSL_want_write(s))
1637                 {
1638                 bio=SSL_get_wbio(s);
1639                 if (BIO_should_write(bio))
1640                         return(SSL_ERROR_WANT_WRITE);
1641                 else if (BIO_should_read(bio))
1642                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1643                         return(SSL_ERROR_WANT_READ);
1644                 else if (BIO_should_io_special(bio))
1645                         {
1646                         reason=BIO_get_retry_reason(bio);
1647                         if (reason == BIO_RR_CONNECT)
1648                                 return(SSL_ERROR_WANT_CONNECT);
1649                         else if (reason == BIO_RR_ACCEPT)
1650                                 return(SSL_ERROR_WANT_ACCEPT);
1651                         else
1652                                 return(SSL_ERROR_SYSCALL);
1653                         }
1654                 }
1655         if ((i < 0) && SSL_want_x509_lookup(s))
1656                 {
1657                 return(SSL_ERROR_WANT_X509_LOOKUP);
1658                 }
1659
1660         if (i == 0)
1661                 {
1662                 if (s->version == SSL2_VERSION)
1663                         {
1664                         /* assume it is the socket being closed */
1665                         return(SSL_ERROR_ZERO_RETURN);
1666                         }
1667                 else
1668                         {
1669                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1670                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1671                                 return(SSL_ERROR_ZERO_RETURN);
1672                         }
1673                 }
1674         return(SSL_ERROR_SYSCALL);
1675         }
1676
1677 int SSL_do_handshake(SSL *s)
1678         {
1679         int ret=1;
1680
1681         if (s->handshake_func == NULL)
1682                 {
1683                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1684                 return(-1);
1685                 }
1686
1687         s->method->ssl_renegotiate_check(s);
1688
1689         if (SSL_in_init(s) || SSL_in_before(s))
1690                 {
1691                 ret=s->handshake_func(s);
1692                 }
1693         return(ret);
1694         }
1695
1696 /* For the next 2 functions, SSL_clear() sets shutdown and so
1697  * one of these calls will reset it */
1698 void SSL_set_accept_state(SSL *s)
1699         {
1700         s->server=1;
1701         s->shutdown=0;
1702         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1703         s->handshake_func=s->method->ssl_accept;
1704         /* clear the current cipher */
1705         ssl_clear_cipher_ctx(s);
1706         }
1707
1708 void SSL_set_connect_state(SSL *s)
1709         {
1710         s->server=0;
1711         s->shutdown=0;
1712         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1713         s->handshake_func=s->method->ssl_connect;
1714         /* clear the current cipher */
1715         ssl_clear_cipher_ctx(s);
1716         }
1717
1718 int ssl_undefined_function(SSL *s)
1719         {
1720         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1721         return(0);
1722         }
1723
1724 SSL_METHOD *ssl_bad_method(int ver)
1725         {
1726         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1727         return(NULL);
1728         }
1729
1730 const char *SSL_get_version(SSL *s)
1731         {
1732         if (s->version == TLS1_VERSION)
1733                 return("TLSv1");
1734         else if (s->version == SSL3_VERSION)
1735                 return("SSLv3");
1736         else if (s->version == SSL2_VERSION)
1737                 return("SSLv2");
1738         else
1739                 return("unknown");
1740         }
1741
1742 SSL *SSL_dup(SSL *s)
1743         {
1744         STACK_OF(X509_NAME) *sk;
1745         X509_NAME *xn;
1746         SSL *ret;
1747         int i;
1748
1749         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1750             return(NULL);
1751
1752         if (s->session != NULL)
1753                 {
1754                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1755                 SSL_copy_session_id(ret,s);
1756                 }
1757         else
1758                 {
1759                 /* No session has been established yet, so we have to expect
1760                  * that s->cert or ret->cert will be changed later --
1761                  * they should not both point to the same object,
1762                  * and thus we can't use SSL_copy_session_id. */
1763
1764                 ret->method = s->method;
1765                 ret->method->ssl_new(ret);
1766
1767                 if (s->cert != NULL)
1768                         {
1769                         if (ret->cert != NULL)
1770                                 {
1771                                 ssl_cert_free(ret->cert);
1772                                 }
1773                         ret->cert = ssl_cert_dup(s->cert);
1774                         if (ret->cert == NULL)
1775                                 goto err;
1776                         }
1777
1778                 SSL_set_session_id_context(ret,
1779                         s->sid_ctx, s->sid_ctx_length);
1780                 }
1781
1782         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1783         SSL_set_verify(ret,SSL_get_verify_mode(s),
1784                 SSL_get_verify_callback(s));
1785         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1786
1787         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1788
1789         ret->debug=s->debug;
1790         ret->options=s->options;
1791
1792         /* copy app data, a little dangerous perhaps */
1793         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1794                 goto err;
1795
1796         /* setup rbio, and wbio */
1797         if (s->rbio != NULL)
1798                 {
1799                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1800                         goto err;
1801                 }
1802         if (s->wbio != NULL)
1803                 {
1804                 if (s->wbio != s->rbio)
1805                         {
1806                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1807                                 goto err;
1808                         }
1809                 else
1810                         ret->wbio=ret->rbio;
1811                 }
1812
1813         /* dup the cipher_list and cipher_list_by_id stacks */
1814         if (s->cipher_list != NULL)
1815                 {
1816                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1817                         goto err;
1818                 }
1819         if (s->cipher_list_by_id != NULL)
1820                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1821                         == NULL)
1822                         goto err;
1823
1824         /* Dup the client_CA list */
1825         if (s->client_CA != NULL)
1826                 {
1827                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1828                 ret->client_CA=sk;
1829                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1830                         {
1831                         xn=sk_X509_NAME_value(sk,i);
1832                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1833                                 {
1834                                 X509_NAME_free(xn);
1835                                 goto err;
1836                                 }
1837                         }
1838                 }
1839
1840         ret->shutdown=s->shutdown;
1841         ret->state=s->state;
1842         ret->handshake_func=s->handshake_func;
1843         ret->server=s->server;
1844
1845         if (0)
1846                 {
1847 err:
1848                 if (ret != NULL) SSL_free(ret);
1849                 ret=NULL;
1850                 }
1851         return(ret);
1852         }
1853
1854 void ssl_clear_cipher_ctx(SSL *s)
1855         {
1856         if (s->enc_read_ctx != NULL)
1857                 {
1858                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1859                 OPENSSL_free(s->enc_read_ctx);
1860                 s->enc_read_ctx=NULL;
1861                 }
1862         if (s->enc_write_ctx != NULL)
1863                 {
1864                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1865                 OPENSSL_free(s->enc_write_ctx);
1866                 s->enc_write_ctx=NULL;
1867                 }
1868         if (s->expand != NULL)
1869                 {
1870                 COMP_CTX_free(s->expand);
1871                 s->expand=NULL;
1872                 }
1873         if (s->compress != NULL)
1874                 {
1875                 COMP_CTX_free(s->compress);
1876                 s->compress=NULL;
1877                 }
1878         }
1879
1880 /* Fix this function so that it takes an optional type parameter */
1881 X509 *SSL_get_certificate(SSL *s)
1882         {
1883         if (s->cert != NULL)
1884                 return(s->cert->key->x509);
1885         else
1886                 return(NULL);
1887         }
1888
1889 /* Fix this function so that it takes an optional type parameter */
1890 EVP_PKEY *SSL_get_privatekey(SSL *s)
1891         {
1892         if (s->cert != NULL)
1893                 return(s->cert->key->privatekey);
1894         else
1895                 return(NULL);
1896         }
1897
1898 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1899         {
1900         if ((s->session != NULL) && (s->session->cipher != NULL))
1901                 return(s->session->cipher);
1902         return(NULL);
1903         }
1904
1905 int ssl_init_wbio_buffer(SSL *s,int push)
1906         {
1907         BIO *bbio;
1908
1909         if (s->bbio == NULL)
1910                 {
1911                 bbio=BIO_new(BIO_f_buffer());
1912                 if (bbio == NULL) return(0);
1913                 s->bbio=bbio;
1914                 }
1915         else
1916                 {
1917                 bbio=s->bbio;
1918                 if (s->bbio == s->wbio)
1919                         s->wbio=BIO_pop(s->wbio);
1920                 }
1921         (void)BIO_reset(bbio);
1922 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1923         if (!BIO_set_read_buffer_size(bbio,1))
1924                 {
1925                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1926                 return(0);
1927                 }
1928         if (push)
1929                 {
1930                 if (s->wbio != bbio)
1931                         s->wbio=BIO_push(bbio,s->wbio);
1932                 }
1933         else
1934                 {
1935                 if (s->wbio == bbio)
1936                         s->wbio=BIO_pop(bbio);
1937                 }
1938         return(1);
1939         }
1940
1941 void ssl_free_wbio_buffer(SSL *s)
1942         {
1943         if (s->bbio == NULL) return;
1944
1945         if (s->bbio == s->wbio)
1946                 {
1947                 /* remove buffering */
1948                 s->wbio=BIO_pop(s->wbio);
1949 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
1950                 assert(s->wbio != NULL);
1951 #endif
1952         }
1953         BIO_free(s->bbio);
1954         s->bbio=NULL;
1955         }
1956
1957 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1958         {
1959         ctx->quiet_shutdown=mode;
1960         }
1961
1962 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1963         {
1964         return(ctx->quiet_shutdown);
1965         }
1966
1967 void SSL_set_quiet_shutdown(SSL *s,int mode)
1968         {
1969         s->quiet_shutdown=mode;
1970         }
1971
1972 int SSL_get_quiet_shutdown(SSL *s)
1973         {
1974         return(s->quiet_shutdown);
1975         }
1976
1977 void SSL_set_shutdown(SSL *s,int mode)
1978         {
1979         s->shutdown=mode;
1980         }
1981
1982 int SSL_get_shutdown(SSL *s)
1983         {
1984         return(s->shutdown);
1985         }
1986
1987 int SSL_version(SSL *s)
1988         {
1989         return(s->version);
1990         }
1991
1992 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1993         {
1994         return(ssl->ctx);
1995         }
1996
1997 #ifndef OPENSSL_NO_STDIO
1998 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1999         {
2000         return(X509_STORE_set_default_paths(ctx->cert_store));
2001         }
2002
2003 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2004                 const char *CApath)
2005         {
2006         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2007         }
2008 #endif
2009
2010 void SSL_set_info_callback(SSL *ssl,void (*cb)())
2011         {
2012         ssl->info_callback=cb;
2013         }
2014
2015 void (*SSL_get_info_callback(SSL *ssl))(void)
2016         {
2017         return((void (*)())ssl->info_callback);
2018         }
2019
2020 int SSL_state(SSL *ssl)
2021         {
2022         return(ssl->state);
2023         }
2024
2025 void SSL_set_verify_result(SSL *ssl,long arg)
2026         {
2027         ssl->verify_result=arg;
2028         }
2029
2030 long SSL_get_verify_result(SSL *ssl)
2031         {
2032         return(ssl->verify_result);
2033         }
2034
2035 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2036                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2037         {
2038         ssl_meth_num++;
2039         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
2040                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
2041         }
2042
2043 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2044         {
2045         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2046         }
2047
2048 void *SSL_get_ex_data(SSL *s,int idx)
2049         {
2050         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2051         }
2052
2053 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2054                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2055         {
2056         ssl_ctx_meth_num++;
2057         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
2058                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
2059         }
2060
2061 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2062         {
2063         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2064         }
2065
2066 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
2067         {
2068         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2069         }
2070
2071 int ssl_ok(SSL *s)
2072         {
2073         return(1);
2074         }
2075
2076 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
2077         {
2078         return(ctx->cert_store);
2079         }
2080
2081 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2082         {
2083         if (ctx->cert_store != NULL)
2084                 X509_STORE_free(ctx->cert_store);
2085         ctx->cert_store=store;
2086         }
2087
2088 int SSL_want(SSL *s)
2089         {
2090         return(s->rwstate);
2091         }
2092
2093 /*!
2094  * \brief Set the callback for generating temporary RSA keys.
2095  * \param ctx the SSL context.
2096  * \param cb the callback
2097  */
2098
2099 #ifndef OPENSSL_NO_RSA
2100 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2101                                                           int is_export,
2102                                                           int keylength))
2103     {
2104     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2105     }
2106
2107 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2108                                                   int is_export,
2109                                                   int keylength))
2110     {
2111     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2112     }
2113 #endif
2114
2115 #ifdef DOXYGEN
2116 /*!
2117  * \brief The RSA temporary key callback function.
2118  * \param ssl the SSL session.
2119  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2120  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2121  * of the required key in bits.
2122  * \return the temporary RSA key.
2123  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2124  */
2125
2126 RSA *cb(SSL *ssl,int is_export,int keylength)
2127     {}
2128 #endif
2129
2130 /*!
2131  * \brief Set the callback for generating temporary DH keys.
2132  * \param ctx the SSL context.
2133  * \param dh the callback
2134  */
2135
2136 #ifndef OPENSSL_NO_DH
2137 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2138                                                         int keylength))
2139     {
2140     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2141     }
2142
2143 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2144                                                 int keylength))
2145     {
2146     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2147     }
2148 #endif
2149
2150 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2151 #include "../crypto/bio/bss_file.c"
2152 #endif
2153
2154 IMPLEMENT_STACK_OF(SSL_CIPHER)
2155 IMPLEMENT_STACK_OF(SSL_COMP)