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  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function
 180         };
 181
 182 int SSL_clear(SSL *s)
 183         {
 184
 185         if (s->method == NULL)
 186                 {
 187                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 188                 return(0);
 189                 }
 190
 191         if (ssl_clear_bad_session(s))
 192                 {
 193                 SSL_SESSION_free(s->session);
 194                 s->session=NULL;
 195                 }
 196
 197         s->error=0;
 198         s->hit=0;
 199         s->shutdown=0;
 200
 201 #if 0 /* Disabled since version 1.10 of this file (early return not
 202        * needed because SSL_clear is not called when doing renegotiation) */
 203         /* This is set if we are doing dynamic renegotiation so keep
 204          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 205         if (s->new_session) return(1);
 206 #else
 207         if (s->new_session)
 208                 {
 209                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 210                 return 0;
 211                 }
 212 #endif
 213
 214         s->type=0;
 215
 216         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 217
 218         s->version=s->method->version;
 219         s->client_version=s->version;
 220         s->rwstate=SSL_NOTHING;
 221         s->rstate=SSL_ST_READ_HEADER;
 222 #if 0
 223         s->read_ahead=s->ctx->read_ahead;
 224 #endif
 225
 226         if (s->init_buf != NULL)
 227                 {
 228                 BUF_MEM_free(s->init_buf);
 229                 s->init_buf=NULL;
 230                 }
 231
 232         ssl_clear_cipher_ctx(s);
 233         ssl_clear_hash_ctx(&s->read_hash);
 234         ssl_clear_hash_ctx(&s->write_hash);
 235
 236         s->first_packet=0;
 237
 238 #if 1
 239         /* Check to see if we were changed into a different method, if
 240          * so, revert back if we are not doing session-id reuse. */
 241         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 242                 {
 243                 s->method->ssl_free(s);
 244                 s->method=s->ctx->method;
 245                 if (!s->method->ssl_new(s))
 246                         return(0);
 247                 }
 248         else
 249 #endif
 250                 s->method->ssl_clear(s);
 251         return(1);
 252         }
 253
 254 /** Used to change an SSL_CTXs default SSL method type */
 255 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 256         {
 257         STACK_OF(SSL_CIPHER) *sk;
 258
 259         ctx->method=meth;
 260
 261         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 262                 &(ctx->cipher_list_by_id),
 263                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 264         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 265                 {
 266                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 267                 return(0);
 268                 }
 269         return(1);
 270         }
 271
 272 SSL *SSL_new(SSL_CTX *ctx)
 273         {
 274         SSL *s;
 275
 276         if (ctx == NULL)
 277                 {
 278                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 279                 return(NULL);
 280                 }
 281         if (ctx->method == NULL)
 282                 {
 283                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 284                 return(NULL);
 285                 }
 286
 287         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 288         if (s == NULL) goto err;
 289         memset(s,0,sizeof(SSL));
 290
 291 #ifndef OPENSSL_NO_KRB5
 292         s->kssl_ctx = kssl_ctx_new();
 293 #endif  /* OPENSSL_NO_KRB5 */
 294
 295         s->options=ctx->options;
 296         s->mode=ctx->mode;
 297         s->max_cert_list=ctx->max_cert_list;
 298
 299         if (ctx->cert != NULL)
 300                 {
 301                 /* Earlier library versions used to copy the pointer to
 302                  * the CERT, not its contents; only when setting new
 303                  * parameters for the per-SSL copy, ssl_cert_new would be
 304                  * called (and the direct reference to the per-SSL_CTX
 305                  * settings would be lost, but those still were indirectly
 306                  * accessed for various purposes, and for that reason they
 307                  * used to be known as s->ctx->default_cert).
 308                  * Now we don't look at the SSL_CTX's CERT after having
 309                  * duplicated it once. */
 310
 311                 s->cert = ssl_cert_dup(ctx->cert);
 312                 if (s->cert == NULL)
 313                         goto err;
 314                 }
 315         else
 316                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 317
 318         s->read_ahead=ctx->read_ahead;
 319         s->msg_callback=ctx->msg_callback;
 320         s->msg_callback_arg=ctx->msg_callback_arg;
 321         s->verify_mode=ctx->verify_mode;
 322 #if 0
 323         s->verify_depth=ctx->verify_depth;
 324 #endif
 325         s->sid_ctx_length=ctx->sid_ctx_length;
 326         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 327         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 328         s->verify_callback=ctx->default_verify_callback;
 329         s->generate_session_id=ctx->generate_session_id;
 330
 331         s->param = X509_VERIFY_PARAM_new();
 332         if (!s->param)
 333                 goto err;
 334         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 335 #if 0
 336         s->purpose = ctx->purpose;
 337         s->trust = ctx->trust;
 338 #endif
 339         s->quiet_shutdown=ctx->quiet_shutdown;
 340         s->max_send_fragment = ctx->max_send_fragment;
 341
 342         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 343         s->ctx=ctx;
 344 #ifndef OPENSSL_NO_TLSEXT
 345         s->tlsext_debug_cb = 0;
 346         s->tlsext_debug_arg = NULL;
 347         s->tlsext_ticket_expected = 0;
 348         s->tlsext_status_type = -1;
 349         s->tlsext_status_expected = 0;
 350         s->tlsext_ocsp_ids = NULL;
 351         s->tlsext_ocsp_exts = NULL;
 352         s->tlsext_ocsp_resp = NULL;
 353         s->tlsext_ocsp_resplen = -1;
 354         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 355         s->initial_ctx=ctx;
 356 #endif
 357
 358         s->verify_result=X509_V_OK;
 359
 360         s->method=ctx->method;
 361
 362         if (!s->method->ssl_new(s))
 363                 goto err;
 364
 365         s->references=1;
 366         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 367
 368         SSL_clear(s);
 369
 370         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 371
 372 #ifndef OPENSSL_NO_PSK
 373         s->psk_client_callback=ctx->psk_client_callback;
 374         s->psk_server_callback=ctx->psk_server_callback;
 375 #endif
 376
 377         return(s);
 378 err:
 379         if (s != NULL)
 380                 {
 381                 if (s->cert != NULL)
 382                         ssl_cert_free(s->cert);
 383                 if (s->ctx != NULL)
 384                         SSL_CTX_free(s->ctx); /* decrement reference count */
 385                 OPENSSL_free(s);
 386                 }
 387         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 388         return(NULL);
 389         }
 390
 391 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 392                                    unsigned int sid_ctx_len)
 393     {
 394     if(sid_ctx_len > sizeof ctx->sid_ctx)
 395         {
 396         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 397         return 0;
 398         }
 399     ctx->sid_ctx_length=sid_ctx_len;
 400     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 401
 402     return 1;
 403     }
 404
 405 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 406                                unsigned int sid_ctx_len)
 407     {
 408     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 409         {
 410         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 411         return 0;
 412         }
 413     ssl->sid_ctx_length=sid_ctx_len;
 414     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 415
 416     return 1;
 417     }
 418
 419 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 420         {
 421         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 422         ctx->generate_session_id = cb;
 423         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 424         return 1;
 425         }
 426
 427 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 428         {
 429         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 430         ssl->generate_session_id = cb;
 431         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 432         return 1;
 433         }
 434
 435 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 436                                 unsigned int id_len)
 437         {
 438         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 439          * we can "construct" a session to give us the desired check - ie. to
 440          * find if there's a session in the hash table that would conflict with
 441          * any new session built out of this id/id_len and the ssl_version in
 442          * use by this SSL. */
 443         SSL_SESSION r, *p;
 444
 445         if(id_len > sizeof r.session_id)
 446                 return 0;
 447
 448         r.ssl_version = ssl->version;
 449         r.session_id_length = id_len;
 450         memcpy(r.session_id, id, id_len);
 451         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 452          * callback is calling us to check the uniqueness of a shorter ID, it
 453          * must be compared as a padded-out ID because that is what it will be
 454          * converted to when the callback has finished choosing it. */
 455         if((r.ssl_version == SSL2_VERSION) &&
 456                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 457                 {
 458                 memset(r.session_id + id_len, 0,
 459                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 460                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 461                 }
 462
 463         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 464         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 465         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 466         return (p != NULL);
 467         }
 468
 469 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 470         {
 471         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 472         }
 473
 474 int SSL_set_purpose(SSL *s, int purpose)
 475         {
 476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 477         }
 478
 479 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 480         {
 481         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 482         }
 483
 484 int SSL_set_trust(SSL *s, int trust)
 485         {
 486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 487         }
 488
 489 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 490         {
 491         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 492         }
 493
 494 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 495         {
 496         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 497         }
 498
 499 void SSL_free(SSL *s)
 500         {
 501         int i;
 502
 503         if(s == NULL)
 504             return;
 505
 506         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 507 #ifdef REF_PRINT
 508         REF_PRINT("SSL",s);
 509 #endif
 510         if (i > 0) return;
 511 #ifdef REF_CHECK
 512         if (i < 0)
 513                 {
 514                 fprintf(stderr,"SSL_free, bad reference count\n");
 515                 abort(); /* ok */
 516                 }
 517 #endif
 518
 519         if (s->param)
 520                 X509_VERIFY_PARAM_free(s->param);
 521
 522         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 523
 524         if (s->bbio != NULL)
 525                 {
 526                 /* If the buffering BIO is in place, pop it off */
 527                 if (s->bbio == s->wbio)
 528                         {
 529                         s->wbio=BIO_pop(s->wbio);
 530                         }
 531                 BIO_free(s->bbio);
 532                 s->bbio=NULL;
 533                 }
 534         if (s->rbio != NULL)
 535                 BIO_free_all(s->rbio);
 536         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 537                 BIO_free_all(s->wbio);
 538
 539         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 540
 541         /* add extra stuff */
 542         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 543         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 544
 545         /* Make the next call work :-) */
 546         if (s->session != NULL)
 547                 {
 548                 ssl_clear_bad_session(s);
 549                 SSL_SESSION_free(s->session);
 550                 }
 551
 552         ssl_clear_cipher_ctx(s);
 553         ssl_clear_hash_ctx(&s->read_hash);
 554         ssl_clear_hash_ctx(&s->write_hash);
 555
 556         if (s->cert != NULL) ssl_cert_free(s->cert);
 557         /* Free up if allocated */
 558
 559 #ifndef OPENSSL_NO_TLSEXT
 560         if (s->tlsext_hostname)
 561                 OPENSSL_free(s->tlsext_hostname);
 562         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 563 #ifndef OPENSSL_NO_EC
 564         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 565         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 566 #endif /* OPENSSL_NO_EC */
 567         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 568         if (s->tlsext_ocsp_exts)
 569                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 570                                                 X509_EXTENSION_free);
 571         if (s->tlsext_ocsp_ids)
 572                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 573         if (s->tlsext_ocsp_resp)
 574                 OPENSSL_free(s->tlsext_ocsp_resp);
 575 #endif
 576
 577         if (s->client_CA != NULL)
 578                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 579
 580         if (s->method != NULL) s->method->ssl_free(s);
 581
 582         if (s->ctx) SSL_CTX_free(s->ctx);
 583
 584 #ifndef OPENSSL_NO_KRB5
 585         if (s->kssl_ctx != NULL)
 586                 kssl_ctx_free(s->kssl_ctx);
 587 #endif  /* OPENSSL_NO_KRB5 */
 588
 589         OPENSSL_free(s);
 590         }
 591
 592 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 593         {
 594         /* If the output buffering BIO is still in place, remove it
 595          */
 596         if (s->bbio != NULL)
 597                 {
 598                 if (s->wbio == s->bbio)
 599                         {
 600                         s->wbio=s->wbio->next_bio;
 601                         s->bbio->next_bio=NULL;
 602                         }
 603                 }
 604         if ((s->rbio != NULL) && (s->rbio != rbio))
 605                 BIO_free_all(s->rbio);
 606         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 607                 BIO_free_all(s->wbio);
 608         s->rbio=rbio;
 609         s->wbio=wbio;
 610         }
 611
 612 BIO *SSL_get_rbio(const SSL *s)
 613         { return(s->rbio); }
 614
 615 BIO *SSL_get_wbio(const SSL *s)
 616         { return(s->wbio); }
 617
 618 int SSL_get_fd(const SSL *s)
 619         {
 620         return(SSL_get_rfd(s));
 621         }
 622
 623 int SSL_get_rfd(const SSL *s)
 624         {
 625         int ret= -1;
 626         BIO *b,*r;
 627
 628         b=SSL_get_rbio(s);
 629         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 630         if (r != NULL)
 631                 BIO_get_fd(r,&ret);
 632         return(ret);
 633         }
 634
 635 int SSL_get_wfd(const SSL *s)
 636         {
 637         int ret= -1;
 638         BIO *b,*r;
 639
 640         b=SSL_get_wbio(s);
 641         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 642         if (r != NULL)
 643                 BIO_get_fd(r,&ret);
 644         return(ret);
 645         }
 646
 647 #ifndef OPENSSL_NO_SOCK
 648 int SSL_set_fd(SSL *s,int fd)
 649         {
 650         int ret=0;
 651         BIO *bio=NULL;
 652
 653         bio=BIO_new(BIO_s_socket());
 654
 655         if (bio == NULL)
 656                 {
 657                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 658                 goto err;
 659                 }
 660         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 661         SSL_set_bio(s,bio,bio);
 662         ret=1;
 663 err:
 664         return(ret);
 665         }
 666
 667 int SSL_set_wfd(SSL *s,int fd)
 668         {
 669         int ret=0;
 670         BIO *bio=NULL;
 671
 672         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 673                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 674                 {
 675                 bio=BIO_new(BIO_s_socket());
 676
 677                 if (bio == NULL)
 678                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 679                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 680                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 681                 }
 682         else
 683                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 684         ret=1;
 685 err:
 686         return(ret);
 687         }
 688
 689 int SSL_set_rfd(SSL *s,int fd)
 690         {
 691         int ret=0;
 692         BIO *bio=NULL;
 693
 694         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 695                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 696                 {
 697                 bio=BIO_new(BIO_s_socket());
 698
 699                 if (bio == NULL)
 700                         {
 701                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 702                         goto err;
 703                         }
 704                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 705                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 706                 }
 707         else
 708                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 709         ret=1;
 710 err:
 711         return(ret);
 712         }
 713 #endif
 714
 715
 716 /* return length of latest Finished message we sent, copy to 'buf' */
 717 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 718         {
 719         size_t ret = 0;
 720
 721         if (s->s3 != NULL)
 722                 {
 723                 ret = s->s3->tmp.finish_md_len;
 724                 if (count > ret)
 725                         count = ret;
 726                 memcpy(buf, s->s3->tmp.finish_md, count);
 727                 }
 728         return ret;
 729         }
 730
 731 /* return length of latest Finished message we expected, copy to 'buf' */
 732 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 733         {
 734         size_t ret = 0;
 735
 736         if (s->s3 != NULL)
 737                 {
 738                 ret = s->s3->tmp.peer_finish_md_len;
 739                 if (count > ret)
 740                         count = ret;
 741                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 742                 }
 743         return ret;
 744         }
 745
 746
 747 int SSL_get_verify_mode(const SSL *s)
 748         {
 749         return(s->verify_mode);
 750         }
 751
 752 int SSL_get_verify_depth(const SSL *s)
 753         {
 754         return X509_VERIFY_PARAM_get_depth(s->param);
 755         }
 756
 757 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 758         {
 759         return(s->verify_callback);
 760         }
 761
 762 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 763         {
 764         return(ctx->verify_mode);
 765         }
 766
 767 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 768         {
 769         return X509_VERIFY_PARAM_get_depth(ctx->param);
 770         }
 771
 772 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 773         {
 774         return(ctx->default_verify_callback);
 775         }
 776
 777 void SSL_set_verify(SSL *s,int mode,
 778                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 779         {
 780         s->verify_mode=mode;
 781         if (callback != NULL)
 782                 s->verify_callback=callback;
 783         }
 784
 785 void SSL_set_verify_depth(SSL *s,int depth)
 786         {
 787         X509_VERIFY_PARAM_set_depth(s->param, depth);
 788         }
 789
 790 void SSL_set_read_ahead(SSL *s,int yes)
 791         {
 792         s->read_ahead=yes;
 793         }
 794
 795 int SSL_get_read_ahead(const SSL *s)
 796         {
 797         return(s->read_ahead);
 798         }
 799
 800 int SSL_pending(const SSL *s)
 801         {
 802         /* SSL_pending cannot work properly if read-ahead is enabled
 803          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 804          * and it is impossible to fix since SSL_pending cannot report
 805          * errors that may be observed while scanning the new data.
 806          * (Note that SSL_pending() is often used as a boolean value,
 807          * so we'd better not return -1.)
 808          */
 809         return(s->method->ssl_pending(s));
 810         }
 811
 812 X509 *SSL_get_peer_certificate(const SSL *s)
 813         {
 814         X509 *r;
 815
 816         if ((s == NULL) || (s->session == NULL))
 817                 r=NULL;
 818         else
 819                 r=s->session->peer;
 820
 821         if (r == NULL) return(r);
 822
 823         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 824
 825         return(r);
 826         }
 827
 828 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 829         {
 830         STACK_OF(X509) *r;
 831
 832         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 833                 r=NULL;
 834         else
 835                 r=s->session->sess_cert->cert_chain;
 836
 837         /* If we are a client, cert_chain includes the peer's own
 838          * certificate; if we are a server, it does not. */
 839
 840         return(r);
 841         }
 842
 843 /* Now in theory, since the calling process own 't' it should be safe to
 844  * modify.  We need to be able to read f without being hassled */
 845 void SSL_copy_session_id(SSL *t,const SSL *f)
 846         {
 847         CERT *tmp;
 848
 849         /* Do we need to to SSL locking? */
 850         SSL_set_session(t,SSL_get_session(f));
 851
 852         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 853          * vice-versa */
 854         if (t->method != f->method)
 855                 {
 856                 t->method->ssl_free(t); /* cleanup current */
 857                 t->method=f->method;    /* change method */
 858                 t->method->ssl_new(t);  /* setup new */
 859                 }
 860
 861         tmp=t->cert;
 862         if (f->cert != NULL)
 863                 {
 864                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 865                 t->cert=f->cert;
 866                 }
 867         else
 868                 t->cert=NULL;
 869         if (tmp != NULL) ssl_cert_free(tmp);
 870         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 871         }
 872
 873 /* Fix this so it checks all the valid key/cert options */
 874 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 875         {
 876         if (    (ctx == NULL) ||
 877                 (ctx->cert == NULL) ||
 878                 (ctx->cert->key->x509 == NULL))
 879                 {
 880                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 881                 return(0);
 882                 }
 883         if      (ctx->cert->key->privatekey == NULL)
 884                 {
 885                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 886                 return(0);
 887                 }
 888         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 889         }
 890
 891 /* Fix this function so that it takes an optional type parameter */
 892 int SSL_check_private_key(const SSL *ssl)
 893         {
 894         if (ssl == NULL)
 895                 {
 896                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 897                 return(0);
 898                 }
 899         if (ssl->cert == NULL)
 900                 {
 901                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 902                 return 0;
 903                 }
 904         if (ssl->cert->key->x509 == NULL)
 905                 {
 906                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 907                 return(0);
 908                 }
 909         if (ssl->cert->key->privatekey == NULL)
 910                 {
 911                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 912                 return(0);
 913                 }
 914         return(X509_check_private_key(ssl->cert->key->x509,
 915                 ssl->cert->key->privatekey));
 916         }
 917
 918 int SSL_accept(SSL *s)
 919         {
 920         if (s->handshake_func == 0)
 921                 /* Not properly initialized yet */
 922                 SSL_set_accept_state(s);
 923
 924         return(s->method->ssl_accept(s));
 925         }
 926
 927 int SSL_connect(SSL *s)
 928         {
 929         if (s->handshake_func == 0)
 930                 /* Not properly initialized yet */
 931                 SSL_set_connect_state(s);
 932
 933         return(s->method->ssl_connect(s));
 934         }
 935
 936 long SSL_get_default_timeout(const SSL *s)
 937         {
 938         return(s->method->get_timeout());
 939         }
 940
 941 int SSL_read(SSL *s,void *buf,int num)
 942         {
 943         if (s->handshake_func == 0)
 944                 {
 945                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 946                 return -1;
 947                 }
 948
 949         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 950                 {
 951                 s->rwstate=SSL_NOTHING;
 952                 return(0);
 953                 }
 954         return(s->method->ssl_read(s,buf,num));
 955         }
 956
 957 int SSL_peek(SSL *s,void *buf,int num)
 958         {
 959         if (s->handshake_func == 0)
 960                 {
 961                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 962                 return -1;
 963                 }
 964
 965         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 966                 {
 967                 return(0);
 968                 }
 969         return(s->method->ssl_peek(s,buf,num));
 970         }
 971
 972 int SSL_write(SSL *s,const void *buf,int num)
 973         {
 974         if (s->handshake_func == 0)
 975                 {
 976                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 977                 return -1;
 978                 }
 979
 980         if (s->shutdown & SSL_SENT_SHUTDOWN)
 981                 {
 982                 s->rwstate=SSL_NOTHING;
 983                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 984                 return(-1);
 985                 }
 986         return(s->method->ssl_write(s,buf,num));
 987         }
 988
 989 int SSL_shutdown(SSL *s)
 990         {
 991         /* Note that this function behaves differently from what one might
 992          * expect.  Return values are 0 for no success (yet),
 993          * 1 for success; but calling it once is usually not enough,
 994          * even if blocking I/O is used (see ssl3_shutdown).
 995          */
 996
 997         if (s->handshake_func == 0)
 998                 {
 999                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1000                 return -1;
1001                 }
1002
1003         if ((s != NULL) && !SSL_in_init(s))
1004                 return(s->method->ssl_shutdown(s));
1005         else
1006                 return(1);
1007         }
1008
1009 int SSL_renegotiate(SSL *s)
1010         {
1011         if (s->new_session == 0)
1012                 {
1013                 s->new_session=1;
1014                 }
1015         return(s->method->ssl_renegotiate(s));
1016         }
1017
1018 int SSL_renegotiate_pending(SSL *s)
1019         {
1020         /* becomes true when negotiation is requested;
1021          * false again once a handshake has finished */
1022         return (s->new_session != 0);
1023         }
1024
1025 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1026         {
1027         long l;
1028
1029         switch (cmd)
1030                 {
1031         case SSL_CTRL_GET_READ_AHEAD:
1032                 return(s->read_ahead);
1033         case SSL_CTRL_SET_READ_AHEAD:
1034                 l=s->read_ahead;
1035                 s->read_ahead=larg;
1036                 return(l);
1037
1038         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1039                 s->msg_callback_arg = parg;
1040                 return 1;
1041
1042         case SSL_CTRL_OPTIONS:
1043                 return(s->options|=larg);
1044         case SSL_CTRL_MODE:
1045                 return(s->mode|=larg);
1046         case SSL_CTRL_GET_MAX_CERT_LIST:
1047                 return(s->max_cert_list);
1048         case SSL_CTRL_SET_MAX_CERT_LIST:
1049                 l=s->max_cert_list;
1050                 s->max_cert_list=larg;
1051                 return(l);
1052         case SSL_CTRL_SET_MTU:
1053                 if (SSL_version(s) == DTLS1_VERSION ||
1054                     SSL_version(s) == DTLS1_BAD_VER)
1055                         {
1056                         s->d1->mtu = larg;
1057                         return larg;
1058                         }
1059                 return 0;
1060         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1061                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1062                         return 0;
1063                 s->max_send_fragment = larg;
1064                 return 1;
1065         default:
1066                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1067                 }
1068         }
1069
1070 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1071         {
1072         switch(cmd)
1073                 {
1074         case SSL_CTRL_SET_MSG_CALLBACK:
1075                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1076                 return 1;
1077
1078         default:
1079                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1080                 }
1081         }
1082
1083 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1084         {
1085         return ctx->sessions;
1086         }
1087
1088 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1089         {
1090         long l;
1091
1092         switch (cmd)
1093                 {
1094         case SSL_CTRL_GET_READ_AHEAD:
1095                 return(ctx->read_ahead);
1096         case SSL_CTRL_SET_READ_AHEAD:
1097                 l=ctx->read_ahead;
1098                 ctx->read_ahead=larg;
1099                 return(l);
1100
1101         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1102                 ctx->msg_callback_arg = parg;
1103                 return 1;
1104
1105         case SSL_CTRL_GET_MAX_CERT_LIST:
1106                 return(ctx->max_cert_list);
1107         case SSL_CTRL_SET_MAX_CERT_LIST:
1108                 l=ctx->max_cert_list;
1109                 ctx->max_cert_list=larg;
1110                 return(l);
1111
1112         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1113                 l=ctx->session_cache_size;
1114                 ctx->session_cache_size=larg;
1115                 return(l);
1116         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1117                 return(ctx->session_cache_size);
1118         case SSL_CTRL_SET_SESS_CACHE_MODE:
1119                 l=ctx->session_cache_mode;
1120                 ctx->session_cache_mode=larg;
1121                 return(l);
1122         case SSL_CTRL_GET_SESS_CACHE_MODE:
1123                 return(ctx->session_cache_mode);
1124
1125         case SSL_CTRL_SESS_NUMBER:
1126                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1127         case SSL_CTRL_SESS_CONNECT:
1128                 return(ctx->stats.sess_connect);
1129         case SSL_CTRL_SESS_CONNECT_GOOD:
1130                 return(ctx->stats.sess_connect_good);
1131         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1132                 return(ctx->stats.sess_connect_renegotiate);
1133         case SSL_CTRL_SESS_ACCEPT:
1134                 return(ctx->stats.sess_accept);
1135         case SSL_CTRL_SESS_ACCEPT_GOOD:
1136                 return(ctx->stats.sess_accept_good);
1137         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1138                 return(ctx->stats.sess_accept_renegotiate);
1139         case SSL_CTRL_SESS_HIT:
1140                 return(ctx->stats.sess_hit);
1141         case SSL_CTRL_SESS_CB_HIT:
1142                 return(ctx->stats.sess_cb_hit);
1143         case SSL_CTRL_SESS_MISSES:
1144                 return(ctx->stats.sess_miss);
1145         case SSL_CTRL_SESS_TIMEOUTS:
1146                 return(ctx->stats.sess_timeout);
1147         case SSL_CTRL_SESS_CACHE_FULL:
1148                 return(ctx->stats.sess_cache_full);
1149         case SSL_CTRL_OPTIONS:
1150                 return(ctx->options|=larg);
1151         case SSL_CTRL_MODE:
1152                 return(ctx->mode|=larg);
1153         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1154                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1155                         return 0;
1156                 ctx->max_send_fragment = larg;
1157                 return 1;
1158         default:
1159                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1160                 }
1161         }
1162
1163 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1164         {
1165         switch(cmd)
1166                 {
1167         case SSL_CTRL_SET_MSG_CALLBACK:
1168                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1169                 return 1;
1170
1171         default:
1172                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1173                 }
1174         }
1175
1176 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1177         {
1178         long l;
1179
1180         l=a->id-b->id;
1181         if (l == 0L)
1182                 return(0);
1183         else
1184                 return((l > 0)?1:-1);
1185         }
1186
1187 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1188                         const SSL_CIPHER * const *bp)
1189         {
1190         long l;
1191
1192         l=(*ap)->id-(*bp)->id;
1193         if (l == 0L)
1194                 return(0);
1195         else
1196                 return((l > 0)?1:-1);
1197         }
1198
1199 /** return a STACK of the ciphers available for the SSL and in order of
1200  * preference */
1201 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1202         {
1203         if (s != NULL)
1204                 {
1205                 if (s->cipher_list != NULL)
1206                         {
1207                         return(s->cipher_list);
1208                         }
1209                 else if ((s->ctx != NULL) &&
1210                         (s->ctx->cipher_list != NULL))
1211                         {
1212                         return(s->ctx->cipher_list);
1213                         }
1214                 }
1215         return(NULL);
1216         }
1217
1218 /** return a STACK of the ciphers available for the SSL and in order of
1219  * algorithm id */
1220 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1221         {
1222         if (s != NULL)
1223                 {
1224                 if (s->cipher_list_by_id != NULL)
1225                         {
1226                         return(s->cipher_list_by_id);
1227                         }
1228                 else if ((s->ctx != NULL) &&
1229                         (s->ctx->cipher_list_by_id != NULL))
1230                         {
1231                         return(s->ctx->cipher_list_by_id);
1232                         }
1233                 }
1234         return(NULL);
1235         }
1236
1237 /** The old interface to get the same thing as SSL_get_ciphers() */
1238 const char *SSL_get_cipher_list(const SSL *s,int n)
1239         {
1240         SSL_CIPHER *c;
1241         STACK_OF(SSL_CIPHER) *sk;
1242
1243         if (s == NULL) return(NULL);
1244         sk=SSL_get_ciphers(s);
1245         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1246                 return(NULL);
1247         c=sk_SSL_CIPHER_value(sk,n);
1248         if (c == NULL) return(NULL);
1249         return(c->name);
1250         }
1251
1252 /** specify the ciphers to be used by default by the SSL_CTX */
1253 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1254         {
1255         STACK_OF(SSL_CIPHER) *sk;
1256
1257         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1258                 &ctx->cipher_list_by_id,str);
1259         /* ssl_create_cipher_list may return an empty stack if it
1260          * was unable to find a cipher matching the given rule string
1261          * (for example if the rule string specifies a cipher which
1262          * has been disabled). This is not an error as far as
1263          * ssl_create_cipher_list is concerned, and hence
1264          * ctx->cipher_list and ctx->cipher_list_by_id has been
1265          * updated. */
1266         if (sk == NULL)
1267                 return 0;
1268         else if (sk_SSL_CIPHER_num(sk) == 0)
1269                 {
1270                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1271                 return 0;
1272                 }
1273         return 1;
1274         }
1275
1276 /** specify the ciphers to be used by the SSL */
1277 int SSL_set_cipher_list(SSL *s,const char *str)
1278         {
1279         STACK_OF(SSL_CIPHER) *sk;
1280
1281         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1282                 &s->cipher_list_by_id,str);
1283         /* see comment in SSL_CTX_set_cipher_list */
1284         if (sk == NULL)
1285                 return 0;
1286         else if (sk_SSL_CIPHER_num(sk) == 0)
1287                 {
1288                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1289                 return 0;
1290                 }
1291         return 1;
1292         }
1293
1294 /* works well for SSLv2, not so good for SSLv3 */
1295 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1296         {
1297         char *p;
1298         STACK_OF(SSL_CIPHER) *sk;
1299         SSL_CIPHER *c;
1300         int i;
1301
1302         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1303                 (len < 2))
1304                 return(NULL);
1305
1306         p=buf;
1307         sk=s->session->ciphers;
1308         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1309                 {
1310                 int n;
1311
1312                 c=sk_SSL_CIPHER_value(sk,i);
1313                 n=strlen(c->name);
1314                 if (n+1 > len)
1315                         {
1316                         if (p != buf)
1317                                 --p;
1318                         *p='\0';
1319                         return buf;
1320                         }
1321                 strcpy(p,c->name);
1322                 p+=n;
1323                 *(p++)=':';
1324                 len-=n+1;
1325                 }
1326         p[-1]='\0';
1327         return(buf);
1328         }
1329
1330 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1331                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1332         {
1333         int i,j=0;
1334         SSL_CIPHER *c;
1335         unsigned char *q;
1336 #ifndef OPENSSL_NO_KRB5
1337         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1338 #endif /* OPENSSL_NO_KRB5 */
1339
1340         if (sk == NULL) return(0);
1341         q=p;
1342
1343         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1344                 {
1345                 c=sk_SSL_CIPHER_value(sk,i);
1346 #ifndef OPENSSL_NO_KRB5
1347                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1348                     nokrb5)
1349                     continue;
1350 #endif /* OPENSSL_NO_KRB5 */
1351 #ifndef OPENSSL_NO_PSK
1352                 /* with PSK there must be client callback set */
1353                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1354                     s->psk_client_callback == NULL)
1355                         continue;
1356 #endif /* OPENSSL_NO_PSK */
1357                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1358                 p+=j;
1359                 }
1360
1361 #ifdef OPENSSL_RI_MAGIC
1362         if (p == q)
1363                 return 0;
1364         else
1365                 {
1366                 /* Bogus "cipher" to send out RI indicator */
1367                 static SSL_CIPHER ri =
1368                         {
1369                         0, NULL, OPENSSL_RI_MAGIC, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1370                         };
1371                 j = put_cb ? put_cb(&ri,p) : ssl_put_cipher_by_char(s,&ri,p);
1372                 p+=j;
1373                 }
1374 #endif
1375         return(p-q);
1376         }
1377
1378 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1379                                                STACK_OF(SSL_CIPHER) **skp)
1380         {
1381         const SSL_CIPHER *c;
1382         STACK_OF(SSL_CIPHER) *sk;
1383         int i,n;
1384
1385         n=ssl_put_cipher_by_char(s,NULL,NULL);
1386         if ((num%n) != 0)
1387                 {
1388                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1389                 return(NULL);
1390                 }
1391         if ((skp == NULL) || (*skp == NULL))
1392                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1393         else
1394                 {
1395                 sk= *skp;
1396                 sk_SSL_CIPHER_zero(sk);
1397                 }
1398
1399         for (i=0; i<num; i+=n)
1400                 {
1401                 c=ssl_get_cipher_by_char(s,p);
1402                 p+=n;
1403                 if (c != NULL)
1404                         {
1405                         if (!sk_SSL_CIPHER_push(sk,c))
1406                                 {
1407                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1408                                 goto err;
1409                                 }
1410                         }
1411                 }
1412
1413         if (skp != NULL)
1414                 *skp=sk;
1415         return(sk);
1416 err:
1417         if ((skp == NULL) || (*skp == NULL))
1418                 sk_SSL_CIPHER_free(sk);
1419         return(NULL);
1420         }
1421
1422
1423 #ifndef OPENSSL_NO_TLSEXT
1424 /** return a servername extension value if provided in Client Hello, or NULL.
1425  * So far, only host_name types are defined (RFC 3546).
1426  */
1427
1428 const char *SSL_get_servername(const SSL *s, const int type)
1429         {
1430         if (type != TLSEXT_NAMETYPE_host_name)
1431                 return NULL;
1432
1433         return s->session && !s->tlsext_hostname ?
1434                 s->session->tlsext_hostname :
1435                 s->tlsext_hostname;
1436         }
1437
1438 int SSL_get_servername_type(const SSL *s)
1439         {
1440         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1441                 return TLSEXT_NAMETYPE_host_name;
1442         return -1;
1443         }
1444 #endif
1445
1446 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1447         {
1448         unsigned long l;
1449
1450         l=(unsigned long)
1451                 ((unsigned int) a->session_id[0]     )|
1452                 ((unsigned int) a->session_id[1]<< 8L)|
1453                 ((unsigned long)a->session_id[2]<<16L)|
1454                 ((unsigned long)a->session_id[3]<<24L);
1455         return(l);
1456         }
1457
1458 /* NB: If this function (or indeed the hash function which uses a sort of
1459  * coarser function than this one) is changed, ensure
1460  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1461  * able to construct an SSL_SESSION that will collide with any existing session
1462  * with a matching session ID. */
1463 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1464         {
1465         if (a->ssl_version != b->ssl_version)
1466                 return(1);
1467         if (a->session_id_length != b->session_id_length)
1468                 return(1);
1469         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1470         }
1471
1472 /* These wrapper functions should remain rather than redeclaring
1473  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1474  * variable. The reason is that the functions aren't static, they're exposed via
1475  * ssl.h. */
1476 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1477 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1478
1479 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1480         {
1481         SSL_CTX *ret=NULL;
1482
1483         if (meth == NULL)
1484                 {
1485                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1486                 return(NULL);
1487                 }
1488
1489         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1490                 {
1491                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1492                 goto err;
1493                 }
1494         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1495         if (ret == NULL)
1496                 goto err;
1497
1498         memset(ret,0,sizeof(SSL_CTX));
1499
1500         ret->method=meth;
1501
1502         ret->cert_store=NULL;
1503         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1504         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1505         ret->session_cache_head=NULL;
1506         ret->session_cache_tail=NULL;
1507
1508         /* We take the system default */
1509         ret->session_timeout=meth->get_timeout();
1510
1511         ret->new_session_cb=0;
1512         ret->remove_session_cb=0;
1513         ret->get_session_cb=0;
1514         ret->generate_session_id=0;
1515
1516         memset((char *)&ret->stats,0,sizeof(ret->stats));
1517
1518         ret->references=1;
1519         ret->quiet_shutdown=0;
1520
1521 /*      ret->cipher=NULL;*/
1522 /*      ret->s2->challenge=NULL;
1523         ret->master_key=NULL;
1524         ret->key_arg=NULL;
1525         ret->s2->conn_id=NULL; */
1526
1527         ret->info_callback=NULL;
1528
1529         ret->app_verify_callback=0;
1530         ret->app_verify_arg=NULL;
1531
1532         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1533         ret->read_ahead=0;
1534         ret->msg_callback=0;
1535         ret->msg_callback_arg=NULL;
1536         ret->verify_mode=SSL_VERIFY_NONE;
1537 #if 0
1538         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1539 #endif
1540         ret->sid_ctx_length=0;
1541         ret->default_verify_callback=NULL;
1542         if ((ret->cert=ssl_cert_new()) == NULL)
1543                 goto err;
1544
1545         ret->default_passwd_callback=0;
1546         ret->default_passwd_callback_userdata=NULL;
1547         ret->client_cert_cb=0;
1548         ret->app_gen_cookie_cb=0;
1549         ret->app_verify_cookie_cb=0;
1550
1551         ret->sessions=lh_SSL_SESSION_new();
1552         if (ret->sessions == NULL) goto err;
1553         ret->cert_store=X509_STORE_new();
1554         if (ret->cert_store == NULL) goto err;
1555
1556         ssl_create_cipher_list(ret->method,
1557                 &ret->cipher_list,&ret->cipher_list_by_id,
1558                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1559         if (ret->cipher_list == NULL
1560             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1561                 {
1562                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1563                 goto err2;
1564                 }
1565
1566         ret->param = X509_VERIFY_PARAM_new();
1567         if (!ret->param)
1568                 goto err;
1569
1570         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1571                 {
1572                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1573                 goto err2;
1574                 }
1575         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1576                 {
1577                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1578                 goto err2;
1579                 }
1580         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1581                 {
1582                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1583                 goto err2;
1584                 }
1585
1586         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1587                 goto err;
1588
1589         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1590
1591         ret->extra_certs=NULL;
1592         ret->comp_methods=SSL_COMP_get_compression_methods();
1593
1594         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1595
1596 #ifndef OPENSSL_NO_TLSEXT
1597         ret->tlsext_servername_callback = 0;
1598         ret->tlsext_servername_arg = NULL;
1599         /* Setup RFC4507 ticket keys */
1600         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1601                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1602                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1603                 ret->options |= SSL_OP_NO_TICKET;
1604
1605         ret->tlsext_status_cb = 0;
1606         ret->tlsext_status_arg = NULL;
1607
1608 #endif
1609 #ifndef OPENSSL_NO_PSK
1610         ret->psk_identity_hint=NULL;
1611         ret->psk_client_callback=NULL;
1612         ret->psk_server_callback=NULL;
1613 #endif
1614 #ifndef OPENSSL_NO_BUF_FREELISTS
1615         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1616         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1617         if (!ret->rbuf_freelist)
1618                 goto err;
1619         ret->rbuf_freelist->chunklen = 0;
1620         ret->rbuf_freelist->len = 0;
1621         ret->rbuf_freelist->head = NULL;
1622         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1623         if (!ret->wbuf_freelist)
1624                 {
1625                 OPENSSL_free(ret->rbuf_freelist);
1626                 goto err;
1627                 }
1628         ret->wbuf_freelist->chunklen = 0;
1629         ret->wbuf_freelist->len = 0;
1630         ret->wbuf_freelist->head = NULL;
1631 #endif
1632 #ifndef OPENSSL_NO_ENGINE
1633         ret->client_cert_engine = NULL;
1634 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1635 #define eng_strx(x)     #x
1636 #define eng_str(x)      eng_strx(x)
1637         /* Use specific client engine automatically... ignore errors */
1638         {
1639         ENGINE *eng;
1640         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1641         if (!eng)
1642                 {
1643                 ERR_clear_error();
1644                 ENGINE_load_builtin_engines();
1645                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1646                 }
1647         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1648                 ERR_clear_error();
1649         }
1650 #endif
1651 #endif
1652
1653         return(ret);
1654 err:
1655         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1656 err2:
1657         if (ret != NULL) SSL_CTX_free(ret);
1658         return(NULL);
1659         }
1660
1661 #if 0
1662 static void SSL_COMP_free(SSL_COMP *comp)
1663     { OPENSSL_free(comp); }
1664 #endif
1665
1666 #ifndef OPENSSL_NO_BUF_FREELISTS
1667 static void
1668 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1669         {
1670         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1671         for (ent = list->head; ent; ent = next)
1672                 {
1673                 next = ent->next;
1674                 OPENSSL_free(ent);
1675                 }
1676         OPENSSL_free(list);
1677         }
1678 #endif
1679
1680 void SSL_CTX_free(SSL_CTX *a)
1681         {
1682         int i;
1683
1684         if (a == NULL) return;
1685
1686         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1687 #ifdef REF_PRINT
1688         REF_PRINT("SSL_CTX",a);
1689 #endif
1690         if (i > 0) return;
1691 #ifdef REF_CHECK
1692         if (i < 0)
1693                 {
1694                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1695                 abort(); /* ok */
1696                 }
1697 #endif
1698
1699         if (a->param)
1700                 X509_VERIFY_PARAM_free(a->param);
1701
1702         /*
1703          * Free internal session cache. However: the remove_cb() may reference
1704          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1705          * after the sessions were flushed.
1706          * As the ex_data handling routines might also touch the session cache,
1707          * the most secure solution seems to be: empty (flush) the cache, then
1708          * free ex_data, then finally free the cache.
1709          * (See ticket [openssl.org #212].)
1710          */
1711         if (a->sessions != NULL)
1712                 SSL_CTX_flush_sessions(a,0);
1713
1714         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1715
1716         if (a->sessions != NULL)
1717                 lh_SSL_SESSION_free(a->sessions);
1718
1719         if (a->cert_store != NULL)
1720                 X509_STORE_free(a->cert_store);
1721         if (a->cipher_list != NULL)
1722                 sk_SSL_CIPHER_free(a->cipher_list);
1723         if (a->cipher_list_by_id != NULL)
1724                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1725         if (a->cert != NULL)
1726                 ssl_cert_free(a->cert);
1727         if (a->client_CA != NULL)
1728                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1729         if (a->extra_certs != NULL)
1730                 sk_X509_pop_free(a->extra_certs,X509_free);
1731 #if 0 /* This should never be done, since it removes a global database */
1732         if (a->comp_methods != NULL)
1733                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1734 #else
1735         a->comp_methods = NULL;
1736 #endif
1737
1738 #ifndef OPENSSL_NO_PSK
1739         if (a->psk_identity_hint)
1740                 OPENSSL_free(a->psk_identity_hint);
1741 #endif
1742 #ifndef OPENSSL_NO_ENGINE
1743         if (a->client_cert_engine)
1744                 ENGINE_finish(a->client_cert_engine);
1745 #endif
1746
1747 #ifndef OPENSSL_NO_BUF_FREELISTS
1748         if (a->wbuf_freelist)
1749                 ssl_buf_freelist_free(a->wbuf_freelist);
1750         if (a->rbuf_freelist)
1751                 ssl_buf_freelist_free(a->rbuf_freelist);
1752 #endif
1753
1754         OPENSSL_free(a);
1755         }
1756
1757 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1758         {
1759         ctx->default_passwd_callback=cb;
1760         }
1761
1762 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1763         {
1764         ctx->default_passwd_callback_userdata=u;
1765         }
1766
1767 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1768         {
1769         ctx->app_verify_callback=cb;
1770         ctx->app_verify_arg=arg;
1771         }
1772
1773 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1774         {
1775         ctx->verify_mode=mode;
1776         ctx->default_verify_callback=cb;
1777         }
1778
1779 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1780         {
1781         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1782         }
1783
1784 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1785         {
1786         CERT_PKEY *cpk;
1787         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1788         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1789         int rsa_tmp_export,dh_tmp_export,kl;
1790         unsigned long mask_k,mask_a,emask_k,emask_a;
1791         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1792 #ifndef OPENSSL_NO_ECDH
1793         int have_ecdh_tmp;
1794 #endif
1795         X509 *x = NULL;
1796         EVP_PKEY *ecc_pkey = NULL;
1797         int signature_nid = 0;
1798
1799         if (c == NULL) return;
1800
1801         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1802
1803 #ifndef OPENSSL_NO_RSA
1804         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1805         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1806                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1807 #else
1808         rsa_tmp=rsa_tmp_export=0;
1809 #endif
1810 #ifndef OPENSSL_NO_DH
1811         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1812         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1813                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1814 #else
1815         dh_tmp=dh_tmp_export=0;
1816 #endif
1817
1818 #ifndef OPENSSL_NO_ECDH
1819         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1820 #endif
1821         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1822         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1823         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1824         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1825         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1826         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1827         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1828         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1829         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1830         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1831         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1832 /* FIX THIS EAY EAY EAY */
1833         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1834         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1835         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1836         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1837         mask_k=0;
1838         mask_a=0;
1839         emask_k=0;
1840         emask_a=0;
1841
1842
1843
1844 #ifdef CIPHER_DEBUG
1845         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1846                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1847                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1848 #endif
1849
1850         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1851         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1852                 mask_k |= SSL_kGOST;
1853                 mask_a |= SSL_aGOST01;
1854         }
1855         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1856         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1857                 mask_k |= SSL_kGOST;
1858                 mask_a |= SSL_aGOST94;
1859         }
1860
1861         if (rsa_enc || (rsa_tmp && rsa_sign))
1862                 mask_k|=SSL_kRSA;
1863         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1864                 emask_k|=SSL_kRSA;
1865
1866 #if 0
1867         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1868         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1869                 (rsa_enc || rsa_sign || dsa_sign))
1870                 mask_k|=SSL_kEDH;
1871         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1872                 (rsa_enc || rsa_sign || dsa_sign))
1873                 emask_k|=SSL_kEDH;
1874 #endif
1875
1876         if (dh_tmp_export)
1877                 emask_k|=SSL_kEDH;
1878
1879         if (dh_tmp)
1880                 mask_k|=SSL_kEDH;
1881
1882         if (dh_rsa) mask_k|=SSL_kDHr;
1883         if (dh_rsa_export) emask_k|=SSL_kDHr;
1884
1885         if (dh_dsa) mask_k|=SSL_kDHd;
1886         if (dh_dsa_export) emask_k|=SSL_kDHd;
1887
1888         if (rsa_enc || rsa_sign)
1889                 {
1890                 mask_a|=SSL_aRSA;
1891                 emask_a|=SSL_aRSA;
1892                 }
1893
1894         if (dsa_sign)
1895                 {
1896                 mask_a|=SSL_aDSS;
1897                 emask_a|=SSL_aDSS;
1898                 }
1899
1900         mask_a|=SSL_aNULL;
1901         emask_a|=SSL_aNULL;
1902
1903 #ifndef OPENSSL_NO_KRB5
1904         mask_k|=SSL_kKRB5;
1905         mask_a|=SSL_aKRB5;
1906         emask_k|=SSL_kKRB5;
1907         emask_a|=SSL_aKRB5;
1908 #endif
1909
1910         /* An ECC certificate may be usable for ECDH and/or
1911          * ECDSA cipher suites depending on the key usage extension.
1912          */
1913         if (have_ecc_cert)
1914                 {
1915                 /* This call populates extension flags (ex_flags) */
1916                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1917                 X509_check_purpose(x, -1, 0);
1918                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1919                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1920                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1921                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1922                 ecc_pkey = X509_get_pubkey(x);
1923                 ecc_pkey_size = (ecc_pkey != NULL) ?
1924                     EVP_PKEY_bits(ecc_pkey) : 0;
1925                 EVP_PKEY_free(ecc_pkey);
1926                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1927                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1928 #ifndef OPENSSL_NO_ECDH
1929                 if (ecdh_ok)
1930                         {
1931                         const char *sig = OBJ_nid2ln(signature_nid);
1932                         if (sig == NULL)
1933                                 {
1934                                 ERR_clear_error();
1935                                 sig = "unknown";
1936                                 }
1937
1938                         if (strstr(sig, "WithRSA"))
1939                                 {
1940                                 mask_k|=SSL_kECDHr;
1941                                 mask_a|=SSL_aECDH;
1942                                 if (ecc_pkey_size <= 163)
1943                                         {
1944                                         emask_k|=SSL_kECDHr;
1945                                         emask_a|=SSL_aECDH;
1946                                         }
1947                                 }
1948
1949                         if (signature_nid == NID_ecdsa_with_SHA1)
1950                                 {
1951                                 mask_k|=SSL_kECDHe;
1952                                 mask_a|=SSL_aECDH;
1953                                 if (ecc_pkey_size <= 163)
1954                                         {
1955                                         emask_k|=SSL_kECDHe;
1956                                         emask_a|=SSL_aECDH;
1957                                         }
1958                                 }
1959                         }
1960 #endif
1961 #ifndef OPENSSL_NO_ECDSA
1962                 if (ecdsa_ok)
1963                         {
1964                         mask_a|=SSL_aECDSA;
1965                         emask_a|=SSL_aECDSA;
1966                         }
1967 #endif
1968                 }
1969
1970 #ifndef OPENSSL_NO_ECDH
1971         if (have_ecdh_tmp)
1972                 {
1973                 mask_k|=SSL_kEECDH;
1974                 emask_k|=SSL_kEECDH;
1975                 }
1976 #endif
1977
1978 #ifndef OPENSSL_NO_PSK
1979         mask_k |= SSL_kPSK;
1980         mask_a |= SSL_aPSK;
1981         emask_k |= SSL_kPSK;
1982         emask_a |= SSL_aPSK;
1983 #endif
1984
1985         c->mask_k=mask_k;
1986         c->mask_a=mask_a;
1987         c->export_mask_k=emask_k;
1988         c->export_mask_a=emask_a;
1989         c->valid=1;
1990         }
1991
1992 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1993 #define ku_reject(x, usage) \
1994         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1995
1996 #ifndef OPENSSL_NO_EC
1997
1998 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
1999         {
2000         unsigned long alg_k, alg_a;
2001         EVP_PKEY *pkey = NULL;
2002         int keysize = 0;
2003         int signature_nid = 0;
2004
2005         alg_k = cs->algorithm_mkey;
2006         alg_a = cs->algorithm_auth;
2007
2008         if (SSL_C_IS_EXPORT(cs))
2009                 {
2010                 /* ECDH key length in export ciphers must be <= 163 bits */
2011                 pkey = X509_get_pubkey(x);
2012                 if (pkey == NULL) return 0;
2013                 keysize = EVP_PKEY_bits(pkey);
2014                 EVP_PKEY_free(pkey);
2015                 if (keysize > 163) return 0;
2016                 }
2017
2018         /* This call populates the ex_flags field correctly */
2019         X509_check_purpose(x, -1, 0);
2020         if ((x->sig_alg) && (x->sig_alg->algorithm))
2021                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2022         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2023                 {
2024                 /* key usage, if present, must allow key agreement */
2025                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2026                         {
2027                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2028                         return 0;
2029                         }
2030                 if (alg_k & SSL_kECDHe)
2031                         {
2032                         /* signature alg must be ECDSA */
2033                         if (signature_nid != NID_ecdsa_with_SHA1)
2034                                 {
2035                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2036                                 return 0;
2037                                 }
2038                         }
2039                 if (alg_k & SSL_kECDHr)
2040                         {
2041                         /* signature alg must be RSA */
2042
2043                         const char *sig = OBJ_nid2ln(signature_nid);
2044                         if (sig == NULL)
2045                                 {
2046                                 ERR_clear_error();
2047                                 sig = "unknown";
2048                                 }
2049                         if (strstr(sig, "WithRSA") == NULL)
2050                                 {
2051                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2052                                 return 0;
2053                                 }
2054                         }
2055                 }
2056         if (alg_a & SSL_aECDSA)
2057                 {
2058                 /* key usage, if present, must allow signing */
2059                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2060                         {
2061                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2062                         return 0;
2063                         }
2064                 }
2065
2066         return 1;  /* all checks are ok */
2067         }
2068
2069 #endif
2070
2071 /* THIS NEEDS CLEANING UP */
2072 X509 *ssl_get_server_send_cert(SSL *s)
2073         {
2074         unsigned long alg_k,alg_a,mask_k,mask_a;
2075         CERT *c;
2076         int i,is_export;
2077
2078         c=s->cert;
2079         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2080         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2081         if (is_export)
2082                 {
2083                 mask_k = c->export_mask_k;
2084                 mask_a = c->export_mask_a;
2085                 }
2086         else
2087                 {
2088                 mask_k = c->mask_k;
2089                 mask_a = c->mask_a;
2090                 }
2091
2092         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2093         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2094
2095         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2096                 {
2097                 /* we don't need to look at SSL_kEECDH
2098                  * since no certificate is needed for
2099                  * anon ECDH and for authenticated
2100                  * EECDH, the check for the auth
2101                  * algorithm will set i correctly
2102                  * NOTE: For ECDH-RSA, we need an ECC
2103                  * not an RSA cert but for EECDH-RSA
2104                  * we need an RSA cert. Placing the
2105                  * checks for SSL_kECDH before RSA
2106                  * checks ensures the correct cert is chosen.
2107                  */
2108                 i=SSL_PKEY_ECC;
2109                 }
2110         else if (alg_a & SSL_aECDSA)
2111                 {
2112                 i=SSL_PKEY_ECC;
2113                 }
2114         else if (alg_k & SSL_kDHr)
2115                 i=SSL_PKEY_DH_RSA;
2116         else if (alg_k & SSL_kDHd)
2117                 i=SSL_PKEY_DH_DSA;
2118         else if (alg_a & SSL_aDSS)
2119                 i=SSL_PKEY_DSA_SIGN;
2120         else if (alg_a & SSL_aRSA)
2121                 {
2122                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2123                         i=SSL_PKEY_RSA_SIGN;
2124                 else
2125                         i=SSL_PKEY_RSA_ENC;
2126                 }
2127         else if (alg_a & SSL_aKRB5)
2128                 {
2129                 /* VRS something else here? */
2130                 return(NULL);
2131                 }
2132         else if (alg_a & SSL_aGOST94)
2133                 i=SSL_PKEY_GOST94;
2134         else if (alg_a & SSL_aGOST01)
2135                 i=SSL_PKEY_GOST01;
2136         else /* if (alg_a & SSL_aNULL) */
2137                 {
2138                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2139                 return(NULL);
2140                 }
2141         if (c->pkeys[i].x509 == NULL) return(NULL);
2142
2143         return(c->pkeys[i].x509);
2144         }
2145
2146 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2147         {
2148         unsigned long alg_a;
2149         CERT *c;
2150
2151         alg_a = cipher->algorithm_auth;
2152         c=s->cert;
2153
2154         if ((alg_a & SSL_aDSS) &&
2155                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2156                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2157         else if (alg_a & SSL_aRSA)
2158                 {
2159                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2160                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2161                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2162                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2163                 else
2164                         return(NULL);
2165                 }
2166         else if ((alg_a & SSL_aECDSA) &&
2167                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2168                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2169         else /* if (alg_a & SSL_aNULL) */
2170                 {
2171                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2172                 return(NULL);
2173                 }
2174         }
2175
2176 void ssl_update_cache(SSL *s,int mode)
2177         {
2178         int i;
2179
2180         /* If the session_id_length is 0, we are not supposed to cache it,
2181          * and it would be rather hard to do anyway :-) */
2182         if (s->session->session_id_length == 0) return;
2183
2184         i=s->session_ctx->session_cache_mode;
2185         if ((i & mode) && (!s->hit)
2186                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2187                     || SSL_CTX_add_session(s->session_ctx,s->session))
2188                 && (s->session_ctx->new_session_cb != NULL))
2189                 {
2190                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2191                 if (!s->session_ctx->new_session_cb(s,s->session))
2192                         SSL_SESSION_free(s->session);
2193                 }
2194
2195         /* auto flush every 255 connections */
2196         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2197                 ((i & mode) == mode))
2198                 {
2199                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2200                         ?s->session_ctx->stats.sess_connect_good
2201                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2202                         {
2203                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2204                         }
2205                 }
2206         }
2207
2208 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2209         {
2210         return(s->method);
2211         }
2212
2213 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2214         {
2215         int conn= -1;
2216         int ret=1;
2217
2218         if (s->method != meth)
2219                 {
2220                 if (s->handshake_func != NULL)
2221                         conn=(s->handshake_func == s->method->ssl_connect);
2222
2223                 if (s->method->version == meth->version)
2224                         s->method=meth;
2225                 else
2226                         {
2227                         s->method->ssl_free(s);
2228                         s->method=meth;
2229                         ret=s->method->ssl_new(s);
2230                         }
2231
2232                 if (conn == 1)
2233                         s->handshake_func=meth->ssl_connect;
2234                 else if (conn == 0)
2235                         s->handshake_func=meth->ssl_accept;
2236                 }
2237         return(ret);
2238         }
2239
2240 int SSL_get_error(const SSL *s,int i)
2241         {
2242         int reason;
2243         unsigned long l;
2244         BIO *bio;
2245
2246         if (i > 0) return(SSL_ERROR_NONE);
2247
2248         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2249          * etc, where we do encode the error */
2250         if ((l=ERR_peek_error()) != 0)
2251                 {
2252                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2253                         return(SSL_ERROR_SYSCALL);
2254                 else
2255                         return(SSL_ERROR_SSL);
2256                 }
2257
2258         if ((i < 0) && SSL_want_read(s))
2259                 {
2260                 bio=SSL_get_rbio(s);
2261                 if (BIO_should_read(bio))
2262                         return(SSL_ERROR_WANT_READ);
2263                 else if (BIO_should_write(bio))
2264                         /* This one doesn't make too much sense ... We never try
2265                          * to write to the rbio, and an application program where
2266                          * rbio and wbio are separate couldn't even know what it
2267                          * should wait for.
2268                          * However if we ever set s->rwstate incorrectly
2269                          * (so that we have SSL_want_read(s) instead of
2270                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2271                          * this test works around that bug; so it might be safer
2272                          * to keep it. */
2273                         return(SSL_ERROR_WANT_WRITE);
2274                 else if (BIO_should_io_special(bio))
2275                         {
2276                         reason=BIO_get_retry_reason(bio);
2277                         if (reason == BIO_RR_CONNECT)
2278                                 return(SSL_ERROR_WANT_CONNECT);
2279                         else if (reason == BIO_RR_ACCEPT)
2280                                 return(SSL_ERROR_WANT_ACCEPT);
2281                         else
2282                                 return(SSL_ERROR_SYSCALL); /* unknown */
2283                         }
2284                 }
2285
2286         if ((i < 0) && SSL_want_write(s))
2287                 {
2288                 bio=SSL_get_wbio(s);
2289                 if (BIO_should_write(bio))
2290                         return(SSL_ERROR_WANT_WRITE);
2291                 else if (BIO_should_read(bio))
2292                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2293                         return(SSL_ERROR_WANT_READ);
2294                 else if (BIO_should_io_special(bio))
2295                         {
2296                         reason=BIO_get_retry_reason(bio);
2297                         if (reason == BIO_RR_CONNECT)
2298                                 return(SSL_ERROR_WANT_CONNECT);
2299                         else if (reason == BIO_RR_ACCEPT)
2300                                 return(SSL_ERROR_WANT_ACCEPT);
2301                         else
2302                                 return(SSL_ERROR_SYSCALL);
2303                         }
2304                 }
2305         if ((i < 0) && SSL_want_x509_lookup(s))
2306                 {
2307                 return(SSL_ERROR_WANT_X509_LOOKUP);
2308                 }
2309
2310         if (i == 0)
2311                 {
2312                 if (s->version == SSL2_VERSION)
2313                         {
2314                         /* assume it is the socket being closed */
2315                         return(SSL_ERROR_ZERO_RETURN);
2316                         }
2317                 else
2318                         {
2319                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2320                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2321                                 return(SSL_ERROR_ZERO_RETURN);
2322                         }
2323                 }
2324         return(SSL_ERROR_SYSCALL);
2325         }
2326
2327 int SSL_do_handshake(SSL *s)
2328         {
2329         int ret=1;
2330
2331         if (s->handshake_func == NULL)
2332                 {
2333                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2334                 return(-1);
2335                 }
2336
2337         s->method->ssl_renegotiate_check(s);
2338
2339         if (SSL_in_init(s) || SSL_in_before(s))
2340                 {
2341                 ret=s->handshake_func(s);
2342                 }
2343         return(ret);
2344         }
2345
2346 /* For the next 2 functions, SSL_clear() sets shutdown and so
2347  * one of these calls will reset it */
2348 void SSL_set_accept_state(SSL *s)
2349         {
2350         s->server=1;
2351         s->shutdown=0;
2352         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2353         s->handshake_func=s->method->ssl_accept;
2354         /* clear the current cipher */
2355         ssl_clear_cipher_ctx(s);
2356         ssl_clear_hash_ctx(&s->read_hash);
2357         ssl_clear_hash_ctx(&s->write_hash);
2358         }
2359
2360 void SSL_set_connect_state(SSL *s)
2361         {
2362         s->server=0;
2363         s->shutdown=0;
2364         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2365         s->handshake_func=s->method->ssl_connect;
2366         /* clear the current cipher */
2367         ssl_clear_cipher_ctx(s);
2368         ssl_clear_hash_ctx(&s->read_hash);
2369         ssl_clear_hash_ctx(&s->write_hash);
2370         }
2371
2372 int ssl_undefined_function(SSL *s)
2373         {
2374         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2375         return(0);
2376         }
2377
2378 int ssl_undefined_void_function(void)
2379         {
2380         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2381         return(0);
2382         }
2383
2384 int ssl_undefined_const_function(const SSL *s)
2385         {
2386         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2387         return(0);
2388         }
2389
2390 SSL_METHOD *ssl_bad_method(int ver)
2391         {
2392         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2393         return(NULL);
2394         }
2395
2396 const char *SSL_get_version(const SSL *s)
2397         {
2398         if (s->version == TLS1_VERSION)
2399                 return("TLSv1");
2400         else if (s->version == SSL3_VERSION)
2401                 return("SSLv3");
2402         else if (s->version == SSL2_VERSION)
2403                 return("SSLv2");
2404         else
2405                 return("unknown");
2406         }
2407
2408 SSL *SSL_dup(SSL *s)
2409         {
2410         STACK_OF(X509_NAME) *sk;
2411         X509_NAME *xn;
2412         SSL *ret;
2413         int i;
2414
2415         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2416             return(NULL);
2417
2418         ret->version = s->version;
2419         ret->type = s->type;
2420         ret->method = s->method;
2421
2422         if (s->session != NULL)
2423                 {
2424                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2425                 SSL_copy_session_id(ret,s);
2426                 }
2427         else
2428                 {
2429                 /* No session has been established yet, so we have to expect
2430                  * that s->cert or ret->cert will be changed later --
2431                  * they should not both point to the same object,
2432                  * and thus we can't use SSL_copy_session_id. */
2433
2434                 ret->method->ssl_free(ret);
2435                 ret->method = s->method;
2436                 ret->method->ssl_new(ret);
2437
2438                 if (s->cert != NULL)
2439                         {
2440                         if (ret->cert != NULL)
2441                                 {
2442                                 ssl_cert_free(ret->cert);
2443                                 }
2444                         ret->cert = ssl_cert_dup(s->cert);
2445                         if (ret->cert == NULL)
2446                                 goto err;
2447                         }
2448
2449                 SSL_set_session_id_context(ret,
2450                         s->sid_ctx, s->sid_ctx_length);
2451                 }
2452
2453         ret->options=s->options;
2454         ret->mode=s->mode;
2455         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2456         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2457         ret->msg_callback = s->msg_callback;
2458         ret->msg_callback_arg = s->msg_callback_arg;
2459         SSL_set_verify(ret,SSL_get_verify_mode(s),
2460                 SSL_get_verify_callback(s));
2461         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2462         ret->generate_session_id = s->generate_session_id;
2463
2464         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2465
2466         ret->debug=s->debug;
2467
2468         /* copy app data, a little dangerous perhaps */
2469         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2470                 goto err;
2471
2472         /* setup rbio, and wbio */
2473         if (s->rbio != NULL)
2474                 {
2475                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2476                         goto err;
2477                 }
2478         if (s->wbio != NULL)
2479                 {
2480                 if (s->wbio != s->rbio)
2481                         {
2482                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2483                                 goto err;
2484                         }
2485                 else
2486                         ret->wbio=ret->rbio;
2487                 }
2488         ret->rwstate = s->rwstate;
2489         ret->in_handshake = s->in_handshake;
2490         ret->handshake_func = s->handshake_func;
2491         ret->server = s->server;
2492         ret->new_session = s->new_session;
2493         ret->quiet_shutdown = s->quiet_shutdown;
2494         ret->shutdown=s->shutdown;
2495         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2496         ret->rstate=s->rstate;
2497         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2498         ret->hit=s->hit;
2499
2500         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2501
2502         /* dup the cipher_list and cipher_list_by_id stacks */
2503         if (s->cipher_list != NULL)
2504                 {
2505                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2506                         goto err;
2507                 }
2508         if (s->cipher_list_by_id != NULL)
2509                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2510                         == NULL)
2511                         goto err;
2512
2513         /* Dup the client_CA list */
2514         if (s->client_CA != NULL)
2515                 {
2516                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2517                 ret->client_CA=sk;
2518                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2519                         {
2520                         xn=sk_X509_NAME_value(sk,i);
2521                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2522                                 {
2523                                 X509_NAME_free(xn);
2524                                 goto err;
2525                                 }
2526                         }
2527                 }
2528
2529         if (0)
2530                 {
2531 err:
2532                 if (ret != NULL) SSL_free(ret);
2533                 ret=NULL;
2534                 }
2535         return(ret);
2536         }
2537
2538 void ssl_clear_cipher_ctx(SSL *s)
2539         {
2540         if (s->enc_read_ctx != NULL)
2541                 {
2542                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2543                 OPENSSL_free(s->enc_read_ctx);
2544                 s->enc_read_ctx=NULL;
2545                 }
2546         if (s->enc_write_ctx != NULL)
2547                 {
2548                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2549                 OPENSSL_free(s->enc_write_ctx);
2550                 s->enc_write_ctx=NULL;
2551                 }
2552 #ifndef OPENSSL_NO_COMP
2553         if (s->expand != NULL)
2554                 {
2555                 COMP_CTX_free(s->expand);
2556                 s->expand=NULL;
2557                 }
2558         if (s->compress != NULL)
2559                 {
2560                 COMP_CTX_free(s->compress);
2561                 s->compress=NULL;
2562                 }
2563 #endif
2564         }
2565
2566 /* Fix this function so that it takes an optional type parameter */
2567 X509 *SSL_get_certificate(const SSL *s)
2568         {
2569         if (s->cert != NULL)
2570                 return(s->cert->key->x509);
2571         else
2572                 return(NULL);
2573         }
2574
2575 /* Fix this function so that it takes an optional type parameter */
2576 EVP_PKEY *SSL_get_privatekey(SSL *s)
2577         {
2578         if (s->cert != NULL)
2579                 return(s->cert->key->privatekey);
2580         else
2581                 return(NULL);
2582         }
2583
2584 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2585         {
2586         if ((s->session != NULL) && (s->session->cipher != NULL))
2587                 return(s->session->cipher);
2588         return(NULL);
2589         }
2590 #ifdef OPENSSL_NO_COMP
2591 const void *SSL_get_current_compression(SSL *s)
2592         {
2593         return NULL;
2594         }
2595 const void *SSL_get_current_expansion(SSL *s)
2596         {
2597         return NULL;
2598         }
2599 #else
2600
2601 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2602         {
2603         if (s->compress != NULL)
2604                 return(s->compress->meth);
2605         return(NULL);
2606         }
2607
2608 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2609         {
2610         if (s->expand != NULL)
2611                 return(s->expand->meth);
2612         return(NULL);
2613         }
2614 #endif
2615
2616 int ssl_init_wbio_buffer(SSL *s,int push)
2617         {
2618         BIO *bbio;
2619
2620         if (s->bbio == NULL)
2621                 {
2622                 bbio=BIO_new(BIO_f_buffer());
2623                 if (bbio == NULL) return(0);
2624                 s->bbio=bbio;
2625                 }
2626         else
2627                 {
2628                 bbio=s->bbio;
2629                 if (s->bbio == s->wbio)
2630                         s->wbio=BIO_pop(s->wbio);
2631                 }
2632         (void)BIO_reset(bbio);
2633 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2634         if (!BIO_set_read_buffer_size(bbio,1))
2635                 {
2636                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2637                 return(0);
2638                 }
2639         if (push)
2640                 {
2641                 if (s->wbio != bbio)
2642                         s->wbio=BIO_push(bbio,s->wbio);
2643                 }
2644         else
2645                 {
2646                 if (s->wbio == bbio)
2647                         s->wbio=BIO_pop(bbio);
2648                 }
2649         return(1);
2650         }
2651
2652 void ssl_free_wbio_buffer(SSL *s)
2653         {
2654         if (s->bbio == NULL) return;
2655
2656         if (s->bbio == s->wbio)
2657                 {
2658                 /* remove buffering */
2659                 s->wbio=BIO_pop(s->wbio);
2660 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2661                 assert(s->wbio != NULL);
2662 #endif
2663         }
2664         BIO_free(s->bbio);
2665         s->bbio=NULL;
2666         }
2667
2668 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2669         {
2670         ctx->quiet_shutdown=mode;
2671         }
2672
2673 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2674         {
2675         return(ctx->quiet_shutdown);
2676         }
2677
2678 void SSL_set_quiet_shutdown(SSL *s,int mode)
2679         {
2680         s->quiet_shutdown=mode;
2681         }
2682
2683 int SSL_get_quiet_shutdown(const SSL *s)
2684         {
2685         return(s->quiet_shutdown);
2686         }
2687
2688 void SSL_set_shutdown(SSL *s,int mode)
2689         {
2690         s->shutdown=mode;
2691         }
2692
2693 int SSL_get_shutdown(const SSL *s)
2694         {
2695         return(s->shutdown);
2696         }
2697
2698 int SSL_version(const SSL *s)
2699         {
2700         return(s->version);
2701         }
2702
2703 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2704         {
2705         return(ssl->ctx);
2706         }
2707
2708 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2709         {
2710         if (ssl->ctx == ctx)
2711                 return ssl->ctx;
2712 #ifndef OPENSSL_NO_TLSEXT
2713         if (ctx == NULL)
2714                 ctx = ssl->initial_ctx;
2715 #endif
2716         if (ssl->cert != NULL)
2717                 ssl_cert_free(ssl->cert);
2718         ssl->cert = ssl_cert_dup(ctx->cert);
2719         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2720         if (ssl->ctx != NULL)
2721                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2722         ssl->ctx = ctx;
2723         return(ssl->ctx);
2724         }
2725
2726 #ifndef OPENSSL_NO_STDIO
2727 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2728         {
2729         return(X509_STORE_set_default_paths(ctx->cert_store));
2730         }
2731
2732 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2733                 const char *CApath)
2734         {
2735         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2736         }
2737 #endif
2738
2739 void SSL_set_info_callback(SSL *ssl,
2740         void (*cb)(const SSL *ssl,int type,int val))
2741         {
2742         ssl->info_callback=cb;
2743         }
2744
2745 /* One compiler (Diab DCC) doesn't like argument names in returned
2746    function pointer.  */
2747 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2748         {
2749         return ssl->info_callback;
2750         }
2751
2752 int SSL_state(const SSL *ssl)
2753         {
2754         return(ssl->state);
2755         }
2756
2757 void SSL_set_verify_result(SSL *ssl,long arg)
2758         {
2759         ssl->verify_result=arg;
2760         }
2761
2762 long SSL_get_verify_result(const SSL *ssl)
2763         {
2764         return(ssl->verify_result);
2765         }
2766
2767 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2768                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2769         {
2770         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2771                                 new_func, dup_func, free_func);
2772         }
2773
2774 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2775         {
2776         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2777         }
2778
2779 void *SSL_get_ex_data(const SSL *s,int idx)
2780         {
2781         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2782         }
2783
2784 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2785                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2786         {
2787         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2788                                 new_func, dup_func, free_func);
2789         }
2790
2791 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2792         {
2793         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2794         }
2795
2796 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2797         {
2798         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2799         }
2800
2801 int ssl_ok(SSL *s)
2802         {
2803         return(1);
2804         }
2805
2806 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2807         {
2808         return(ctx->cert_store);
2809         }
2810
2811 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2812         {
2813         if (ctx->cert_store != NULL)
2814                 X509_STORE_free(ctx->cert_store);
2815         ctx->cert_store=store;
2816         }
2817
2818 int SSL_want(const SSL *s)
2819         {
2820         return(s->rwstate);
2821         }
2822
2823 /*!
2824  * \brief Set the callback for generating temporary RSA keys.
2825  * \param ctx the SSL context.
2826  * \param cb the callback
2827  */
2828
2829 #ifndef OPENSSL_NO_RSA
2830 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2831                                                           int is_export,
2832                                                           int keylength))
2833     {
2834     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2835     }
2836
2837 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2838                                                   int is_export,
2839                                                   int keylength))
2840     {
2841     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2842     }
2843 #endif
2844
2845 #ifdef DOXYGEN
2846 /*!
2847  * \brief The RSA temporary key callback function.
2848  * \param ssl the SSL session.
2849  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2850  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2851  * of the required key in bits.
2852  * \return the temporary RSA key.
2853  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2854  */
2855
2856 RSA *cb(SSL *ssl,int is_export,int keylength)
2857     {}
2858 #endif
2859
2860 /*!
2861  * \brief Set the callback for generating temporary DH keys.
2862  * \param ctx the SSL context.
2863  * \param dh the callback
2864  */
2865
2866 #ifndef OPENSSL_NO_DH
2867 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2868                                                         int keylength))
2869         {
2870         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2871         }
2872
2873 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2874                                                 int keylength))
2875         {
2876         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2877         }
2878 #endif
2879
2880 #ifndef OPENSSL_NO_ECDH
2881 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2882                                                                 int keylength))
2883         {
2884         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2885         }
2886
2887 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2888                                                         int keylength))
2889         {
2890         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2891         }
2892 #endif
2893
2894 #ifndef OPENSSL_NO_PSK
2895 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2896         {
2897         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2898                 {
2899                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2900                 return 0;
2901                 }
2902         if (ctx->psk_identity_hint != NULL)
2903                 OPENSSL_free(ctx->psk_identity_hint);
2904         if (identity_hint != NULL)
2905                 {
2906                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2907                 if (ctx->psk_identity_hint == NULL)
2908                         return 0;
2909                 }
2910         else
2911                 ctx->psk_identity_hint = NULL;
2912         return 1;
2913         }
2914
2915 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2916         {
2917         if (s == NULL)
2918                 return 0;
2919
2920         if (s->session == NULL)
2921                 return 1; /* session not created yet, ignored */
2922
2923         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2924                 {
2925                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2926                 return 0;
2927                 }
2928         if (s->session->psk_identity_hint != NULL)
2929                 OPENSSL_free(s->session->psk_identity_hint);
2930         if (identity_hint != NULL)
2931                 {
2932                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2933                 if (s->session->psk_identity_hint == NULL)
2934                         return 0;
2935                 }
2936         else
2937                 s->session->psk_identity_hint = NULL;
2938         return 1;
2939         }
2940
2941 const char *SSL_get_psk_identity_hint(const SSL *s)
2942         {
2943         if (s == NULL || s->session == NULL)
2944                 return NULL;
2945         return(s->session->psk_identity_hint);
2946         }
2947
2948 const char *SSL_get_psk_identity(const SSL *s)
2949         {
2950         if (s == NULL || s->session == NULL)
2951                 return NULL;
2952         return(s->session->psk_identity);
2953         }
2954
2955 void SSL_set_psk_client_callback(SSL *s,
2956     unsigned int (*cb)(SSL *ssl, const char *hint,
2957                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2958                        unsigned int max_psk_len))
2959         {
2960         s->psk_client_callback = cb;
2961         }
2962
2963 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2964     unsigned int (*cb)(SSL *ssl, const char *hint,
2965                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2966                        unsigned int max_psk_len))
2967         {
2968         ctx->psk_client_callback = cb;
2969         }
2970
2971 void SSL_set_psk_server_callback(SSL *s,
2972     unsigned int (*cb)(SSL *ssl, const char *identity,
2973                        unsigned char *psk, unsigned int max_psk_len))
2974         {
2975         s->psk_server_callback = cb;
2976         }
2977
2978 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2979     unsigned int (*cb)(SSL *ssl, const char *identity,
2980                        unsigned char *psk, unsigned int max_psk_len))
2981         {
2982         ctx->psk_server_callback = cb;
2983         }
2984 #endif
2985
2986 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
2987         {
2988         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2989         }
2990 void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
2991         {
2992         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2993         }
2994
2995 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2996  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2997  * any. If EVP_MD pointer is passed, initializes ctx with this md
2998  * Returns newly allocated ctx;
2999  */
3000
3001 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3002 {
3003         ssl_clear_hash_ctx(hash);
3004         *hash = EVP_MD_CTX_create();
3005         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3006         return *hash;
3007 }
3008 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3009 {
3010
3011         if (*hash) EVP_MD_CTX_destroy(*hash);
3012         *hash=NULL;
3013 }
3014
3015 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3016 #include "../crypto/bio/bss_file.c"
3017 #endif
3018
3019 IMPLEMENT_STACK_OF(SSL_CIPHER)
3020 IMPLEMENT_STACK_OF(SSL_COMP)
3021 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3022                                     ssl_cipher_id);
3023