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_CLEAR_OPTIONS:
1045                 return(s->options&=~larg);
1046         case SSL_CTRL_MODE:
1047                 return(s->mode|=larg);
1048         case SSL_CTRL_CLEAR_MODE:
1049                 return(s->mode &=~larg);
1050         case SSL_CTRL_GET_MAX_CERT_LIST:
1051                 return(s->max_cert_list);
1052         case SSL_CTRL_SET_MAX_CERT_LIST:
1053                 l=s->max_cert_list;
1054                 s->max_cert_list=larg;
1055                 return(l);
1056         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1057                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1058                         return 0;
1059                 s->max_send_fragment = larg;
1060                 return 1;
1061         case SSL_CTRL_GET_RI_SUPPORT:
1062                 if (s->s3)
1063                         return s->s3->send_connection_binding;
1064                 else return 0;
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_CLEAR_OPTIONS:
1152                 return(ctx->options&=~larg);
1153         case SSL_CTRL_MODE:
1154                 return(ctx->mode|=larg);
1155         case SSL_CTRL_CLEAR_MODE:
1156                 return(ctx->mode&=~larg);
1157         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1158                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1159                         return 0;
1160                 ctx->max_send_fragment = larg;
1161                 return 1;
1162         default:
1163                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1164                 }
1165         }
1166
1167 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1168         {
1169         switch(cmd)
1170                 {
1171         case SSL_CTRL_SET_MSG_CALLBACK:
1172                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1173                 return 1;
1174
1175         default:
1176                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1177                 }
1178         }
1179
1180 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1181         {
1182         long l;
1183
1184         l=a->id-b->id;
1185         if (l == 0L)
1186                 return(0);
1187         else
1188                 return((l > 0)?1:-1);
1189         }
1190
1191 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1192                         const SSL_CIPHER * const *bp)
1193         {
1194         long l;
1195
1196         l=(*ap)->id-(*bp)->id;
1197         if (l == 0L)
1198                 return(0);
1199         else
1200                 return((l > 0)?1:-1);
1201         }
1202
1203 /** return a STACK of the ciphers available for the SSL and in order of
1204  * preference */
1205 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1206         {
1207         if (s != NULL)
1208                 {
1209                 if (s->cipher_list != NULL)
1210                         {
1211                         return(s->cipher_list);
1212                         }
1213                 else if ((s->ctx != NULL) &&
1214                         (s->ctx->cipher_list != NULL))
1215                         {
1216                         return(s->ctx->cipher_list);
1217                         }
1218                 }
1219         return(NULL);
1220         }
1221
1222 /** return a STACK of the ciphers available for the SSL and in order of
1223  * algorithm id */
1224 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1225         {
1226         if (s != NULL)
1227                 {
1228                 if (s->cipher_list_by_id != NULL)
1229                         {
1230                         return(s->cipher_list_by_id);
1231                         }
1232                 else if ((s->ctx != NULL) &&
1233                         (s->ctx->cipher_list_by_id != NULL))
1234                         {
1235                         return(s->ctx->cipher_list_by_id);
1236                         }
1237                 }
1238         return(NULL);
1239         }
1240
1241 /** The old interface to get the same thing as SSL_get_ciphers() */
1242 const char *SSL_get_cipher_list(const SSL *s,int n)
1243         {
1244         SSL_CIPHER *c;
1245         STACK_OF(SSL_CIPHER) *sk;
1246
1247         if (s == NULL) return(NULL);
1248         sk=SSL_get_ciphers(s);
1249         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1250                 return(NULL);
1251         c=sk_SSL_CIPHER_value(sk,n);
1252         if (c == NULL) return(NULL);
1253         return(c->name);
1254         }
1255
1256 /** specify the ciphers to be used by default by the SSL_CTX */
1257 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1258         {
1259         STACK_OF(SSL_CIPHER) *sk;
1260
1261         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1262                 &ctx->cipher_list_by_id,str);
1263         /* ssl_create_cipher_list may return an empty stack if it
1264          * was unable to find a cipher matching the given rule string
1265          * (for example if the rule string specifies a cipher which
1266          * has been disabled). This is not an error as far as
1267          * ssl_create_cipher_list is concerned, and hence
1268          * ctx->cipher_list and ctx->cipher_list_by_id has been
1269          * updated. */
1270         if (sk == NULL)
1271                 return 0;
1272         else if (sk_SSL_CIPHER_num(sk) == 0)
1273                 {
1274                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1275                 return 0;
1276                 }
1277         return 1;
1278         }
1279
1280 /** specify the ciphers to be used by the SSL */
1281 int SSL_set_cipher_list(SSL *s,const char *str)
1282         {
1283         STACK_OF(SSL_CIPHER) *sk;
1284
1285         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1286                 &s->cipher_list_by_id,str);
1287         /* see comment in SSL_CTX_set_cipher_list */
1288         if (sk == NULL)
1289                 return 0;
1290         else if (sk_SSL_CIPHER_num(sk) == 0)
1291                 {
1292                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1293                 return 0;
1294                 }
1295         return 1;
1296         }
1297
1298 /* works well for SSLv2, not so good for SSLv3 */
1299 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1300         {
1301         char *p;
1302         STACK_OF(SSL_CIPHER) *sk;
1303         SSL_CIPHER *c;
1304         int i;
1305
1306         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1307                 (len < 2))
1308                 return(NULL);
1309
1310         p=buf;
1311         sk=s->session->ciphers;
1312
1313         if (sk_SSL_CIPHER_num(sk) == 0)
1314                 return NULL;
1315
1316         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1317                 {
1318                 int n;
1319
1320                 c=sk_SSL_CIPHER_value(sk,i);
1321                 n=strlen(c->name);
1322                 if (n+1 > len)
1323                         {
1324                         if (p != buf)
1325                                 --p;
1326                         *p='\0';
1327                         return buf;
1328                         }
1329                 strcpy(p,c->name);
1330                 p+=n;
1331                 *(p++)=':';
1332                 len-=n+1;
1333                 }
1334         p[-1]='\0';
1335         return(buf);
1336         }
1337
1338 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1339                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1340         {
1341         int i,j=0;
1342         SSL_CIPHER *c;
1343         unsigned char *q;
1344 #ifndef OPENSSL_NO_KRB5
1345         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1346 #endif /* OPENSSL_NO_KRB5 */
1347
1348         if (sk == NULL) return(0);
1349         q=p;
1350         if (put_cb == NULL)
1351                 put_cb = s->method->put_cipher_by_char;
1352
1353         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1354                 {
1355                 c=sk_SSL_CIPHER_value(sk,i);
1356 #ifndef OPENSSL_NO_KRB5
1357                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1358                     nokrb5)
1359                     continue;
1360 #endif /* OPENSSL_NO_KRB5 */
1361 #ifndef OPENSSL_NO_PSK
1362                 /* with PSK there must be client callback set */
1363                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1364                     s->psk_client_callback == NULL)
1365                         continue;
1366 #endif /* OPENSSL_NO_PSK */
1367                 j = put_cb(c,p);
1368                 p+=j;
1369                 }
1370         /* If p == q, no ciphers; caller indicates an error.
1371          * Otherwise, add applicable SCSVs. */
1372         if (p != q)
1373                 {
1374                 if (!s->new_session)
1375                         {
1376                         static SSL_CIPHER scsv =
1377                                 {
1378                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1379                                 };
1380                         j = put_cb(&scsv,p);
1381                         p+=j;
1382 #ifdef OPENSSL_RI_DEBUG
1383                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1384 #endif
1385                         }
1386
1387                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1388                         {
1389                         static SSL_CIPHER scsv =
1390                                 {
1391                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1392                                 };
1393                         j = put_cb(&scsv,p);
1394                         p+=j;
1395                         }
1396                 }
1397
1398         return(p-q);
1399         }
1400
1401 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1402                                                STACK_OF(SSL_CIPHER) **skp)
1403         {
1404         const SSL_CIPHER *c;
1405         STACK_OF(SSL_CIPHER) *sk;
1406         int i,n;
1407
1408         if (s->s3)
1409                 s->s3->send_connection_binding = 0;
1410
1411         n=ssl_put_cipher_by_char(s,NULL,NULL);
1412         if (n == 0 || (num%n) != 0)
1413                 {
1414                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1415                 return(NULL);
1416                 }
1417         if ((skp == NULL) || (*skp == NULL))
1418                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1419         else
1420                 {
1421                 sk= *skp;
1422                 sk_SSL_CIPHER_zero(sk);
1423                 }
1424
1425         for (i=0; i<num; i+=n)
1426                 {
1427                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1428                 if (s->s3 && (n != 3 || !p[0]) &&
1429                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1430                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1431                         {
1432                         /* SCSV fatal if renegotiating */
1433                         if (s->new_session)
1434                                 {
1435                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1436                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1437                                 goto err;
1438                                 }
1439                         s->s3->send_connection_binding = 1;
1440                         p += n;
1441 #ifdef OPENSSL_RI_DEBUG
1442                         fprintf(stderr, "SCSV received by server\n");
1443 #endif
1444                         continue;
1445                         }
1446
1447                 /* Check for TLS_FALLBACK_SCSV */
1448                 if ((n != 3 || !p[0]) &&
1449                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1450                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1451                         {
1452                         /* The SCSV indicates that the client previously tried a higher version.
1453                          * Fail if the current version is an unexpected downgrade. */
1454                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1455                                 {
1456                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1457                                 if (s->s3)
1458                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1459                                 goto err;
1460                                 }
1461                         p += n;
1462                         continue;
1463                         }
1464
1465                 c=ssl_get_cipher_by_char(s,p);
1466                 p+=n;
1467                 if (c != NULL)
1468                         {
1469                         if (!sk_SSL_CIPHER_push(sk,c))
1470                                 {
1471                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1472                                 goto err;
1473                                 }
1474                         }
1475                 }
1476
1477         if (skp != NULL)
1478                 *skp=sk;
1479         return(sk);
1480 err:
1481         if ((skp == NULL) || (*skp == NULL))
1482                 sk_SSL_CIPHER_free(sk);
1483         return(NULL);
1484         }
1485
1486
1487 #ifndef OPENSSL_NO_TLSEXT
1488 /** return a servername extension value if provided in Client Hello, or NULL.
1489  * So far, only host_name types are defined (RFC 3546).
1490  */
1491
1492 const char *SSL_get_servername(const SSL *s, const int type)
1493         {
1494         if (type != TLSEXT_NAMETYPE_host_name)
1495                 return NULL;
1496
1497         return s->session && !s->tlsext_hostname ?
1498                 s->session->tlsext_hostname :
1499                 s->tlsext_hostname;
1500         }
1501
1502 int SSL_get_servername_type(const SSL *s)
1503         {
1504         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1505                 return TLSEXT_NAMETYPE_host_name;
1506         return -1;
1507         }
1508 #endif
1509
1510 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1511         {
1512         unsigned long l;
1513
1514         l=(unsigned long)
1515                 ((unsigned int) a->session_id[0]     )|
1516                 ((unsigned int) a->session_id[1]<< 8L)|
1517                 ((unsigned long)a->session_id[2]<<16L)|
1518                 ((unsigned long)a->session_id[3]<<24L);
1519         return(l);
1520         }
1521
1522 /* NB: If this function (or indeed the hash function which uses a sort of
1523  * coarser function than this one) is changed, ensure
1524  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1525  * able to construct an SSL_SESSION that will collide with any existing session
1526  * with a matching session ID. */
1527 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1528         {
1529         if (a->ssl_version != b->ssl_version)
1530                 return(1);
1531         if (a->session_id_length != b->session_id_length)
1532                 return(1);
1533         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1534         }
1535
1536 /* These wrapper functions should remain rather than redeclaring
1537  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1538  * variable. The reason is that the functions aren't static, they're exposed via
1539  * ssl.h. */
1540 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1541 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1542
1543 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1544         {
1545         SSL_CTX *ret=NULL;
1546
1547         if (meth == NULL)
1548                 {
1549                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1550                 return(NULL);
1551                 }
1552
1553         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1554                 {
1555                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1556                 goto err;
1557                 }
1558         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1559         if (ret == NULL)
1560                 goto err;
1561
1562         memset(ret,0,sizeof(SSL_CTX));
1563
1564         ret->method=meth;
1565
1566         ret->cert_store=NULL;
1567         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1568         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1569         ret->session_cache_head=NULL;
1570         ret->session_cache_tail=NULL;
1571
1572         /* We take the system default */
1573         ret->session_timeout=meth->get_timeout();
1574
1575         ret->new_session_cb=0;
1576         ret->remove_session_cb=0;
1577         ret->get_session_cb=0;
1578         ret->generate_session_id=0;
1579
1580         memset((char *)&ret->stats,0,sizeof(ret->stats));
1581
1582         ret->references=1;
1583         ret->quiet_shutdown=0;
1584
1585 /*      ret->cipher=NULL;*/
1586 /*      ret->s2->challenge=NULL;
1587         ret->master_key=NULL;
1588         ret->key_arg=NULL;
1589         ret->s2->conn_id=NULL; */
1590
1591         ret->info_callback=NULL;
1592
1593         ret->app_verify_callback=0;
1594         ret->app_verify_arg=NULL;
1595
1596         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1597         ret->read_ahead=0;
1598         ret->msg_callback=0;
1599         ret->msg_callback_arg=NULL;
1600         ret->verify_mode=SSL_VERIFY_NONE;
1601 #if 0
1602         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1603 #endif
1604         ret->sid_ctx_length=0;
1605         ret->default_verify_callback=NULL;
1606         if ((ret->cert=ssl_cert_new()) == NULL)
1607                 goto err;
1608
1609         ret->default_passwd_callback=0;
1610         ret->default_passwd_callback_userdata=NULL;
1611         ret->client_cert_cb=0;
1612         ret->app_gen_cookie_cb=0;
1613         ret->app_verify_cookie_cb=0;
1614
1615         ret->sessions=lh_SSL_SESSION_new();
1616         if (ret->sessions == NULL) goto err;
1617         ret->cert_store=X509_STORE_new();
1618         if (ret->cert_store == NULL) goto err;
1619
1620         ssl_create_cipher_list(ret->method,
1621                 &ret->cipher_list,&ret->cipher_list_by_id,
1622                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1623         if (ret->cipher_list == NULL
1624             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1625                 {
1626                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1627                 goto err2;
1628                 }
1629
1630         ret->param = X509_VERIFY_PARAM_new();
1631         if (!ret->param)
1632                 goto err;
1633
1634         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1635                 {
1636                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1637                 goto err2;
1638                 }
1639         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1640                 {
1641                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1642                 goto err2;
1643                 }
1644         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1645                 {
1646                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1647                 goto err2;
1648                 }
1649
1650         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1651                 goto err;
1652
1653         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1654
1655         ret->extra_certs=NULL;
1656         /* No compression for DTLS */
1657         if (meth->version != DTLS1_VERSION)
1658                 ret->comp_methods=SSL_COMP_get_compression_methods();
1659
1660         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1661
1662 #ifndef OPENSSL_NO_TLSEXT
1663         ret->tlsext_servername_callback = 0;
1664         ret->tlsext_servername_arg = NULL;
1665         /* Setup RFC4507 ticket keys */
1666         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1667                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1668                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1669                 ret->options |= SSL_OP_NO_TICKET;
1670
1671         ret->tlsext_status_cb = 0;
1672         ret->tlsext_status_arg = NULL;
1673
1674 #endif
1675 #ifndef OPENSSL_NO_PSK
1676         ret->psk_identity_hint=NULL;
1677         ret->psk_client_callback=NULL;
1678         ret->psk_server_callback=NULL;
1679 #endif
1680 #ifndef OPENSSL_NO_BUF_FREELISTS
1681         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1682         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1683         if (!ret->rbuf_freelist)
1684                 goto err;
1685         ret->rbuf_freelist->chunklen = 0;
1686         ret->rbuf_freelist->len = 0;
1687         ret->rbuf_freelist->head = NULL;
1688         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1689         if (!ret->wbuf_freelist)
1690                 {
1691                 OPENSSL_free(ret->rbuf_freelist);
1692                 goto err;
1693                 }
1694         ret->wbuf_freelist->chunklen = 0;
1695         ret->wbuf_freelist->len = 0;
1696         ret->wbuf_freelist->head = NULL;
1697 #endif
1698 #ifndef OPENSSL_NO_ENGINE
1699         ret->client_cert_engine = NULL;
1700 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1701 #define eng_strx(x)     #x
1702 #define eng_str(x)      eng_strx(x)
1703         /* Use specific client engine automatically... ignore errors */
1704         {
1705         ENGINE *eng;
1706         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1707         if (!eng)
1708                 {
1709                 ERR_clear_error();
1710                 ENGINE_load_builtin_engines();
1711                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1712                 }
1713         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1714                 ERR_clear_error();
1715         }
1716 #endif
1717 #endif
1718         /* Default is to connect to non-RI servers. When RI is more widely
1719          * deployed might change this.
1720          */
1721         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1722
1723         return(ret);
1724 err:
1725         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1726 err2:
1727         if (ret != NULL) SSL_CTX_free(ret);
1728         return(NULL);
1729         }
1730
1731 #if 0
1732 static void SSL_COMP_free(SSL_COMP *comp)
1733     { OPENSSL_free(comp); }
1734 #endif
1735
1736 #ifndef OPENSSL_NO_BUF_FREELISTS
1737 static void
1738 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1739         {
1740         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1741         for (ent = list->head; ent; ent = next)
1742                 {
1743                 next = ent->next;
1744                 OPENSSL_free(ent);
1745                 }
1746         OPENSSL_free(list);
1747         }
1748 #endif
1749
1750 void SSL_CTX_free(SSL_CTX *a)
1751         {
1752         int i;
1753
1754         if (a == NULL) return;
1755
1756         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1757 #ifdef REF_PRINT
1758         REF_PRINT("SSL_CTX",a);
1759 #endif
1760         if (i > 0) return;
1761 #ifdef REF_CHECK
1762         if (i < 0)
1763                 {
1764                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1765                 abort(); /* ok */
1766                 }
1767 #endif
1768
1769         if (a->param)
1770                 X509_VERIFY_PARAM_free(a->param);
1771
1772         /*
1773          * Free internal session cache. However: the remove_cb() may reference
1774          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1775          * after the sessions were flushed.
1776          * As the ex_data handling routines might also touch the session cache,
1777          * the most secure solution seems to be: empty (flush) the cache, then
1778          * free ex_data, then finally free the cache.
1779          * (See ticket [openssl.org #212].)
1780          */
1781         if (a->sessions != NULL)
1782                 SSL_CTX_flush_sessions(a,0);
1783
1784         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1785
1786         if (a->sessions != NULL)
1787                 lh_SSL_SESSION_free(a->sessions);
1788
1789         if (a->cert_store != NULL)
1790                 X509_STORE_free(a->cert_store);
1791         if (a->cipher_list != NULL)
1792                 sk_SSL_CIPHER_free(a->cipher_list);
1793         if (a->cipher_list_by_id != NULL)
1794                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1795         if (a->cert != NULL)
1796                 ssl_cert_free(a->cert);
1797         if (a->client_CA != NULL)
1798                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1799         if (a->extra_certs != NULL)
1800                 sk_X509_pop_free(a->extra_certs,X509_free);
1801 #if 0 /* This should never be done, since it removes a global database */
1802         if (a->comp_methods != NULL)
1803                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1804 #else
1805         a->comp_methods = NULL;
1806 #endif
1807
1808 #ifndef OPENSSL_NO_PSK
1809         if (a->psk_identity_hint)
1810                 OPENSSL_free(a->psk_identity_hint);
1811 #endif
1812 #ifndef OPENSSL_NO_ENGINE
1813         if (a->client_cert_engine)
1814                 ENGINE_finish(a->client_cert_engine);
1815 #endif
1816
1817 #ifndef OPENSSL_NO_BUF_FREELISTS
1818         if (a->wbuf_freelist)
1819                 ssl_buf_freelist_free(a->wbuf_freelist);
1820         if (a->rbuf_freelist)
1821                 ssl_buf_freelist_free(a->rbuf_freelist);
1822 #endif
1823
1824         OPENSSL_free(a);
1825         }
1826
1827 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1828         {
1829         ctx->default_passwd_callback=cb;
1830         }
1831
1832 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1833         {
1834         ctx->default_passwd_callback_userdata=u;
1835         }
1836
1837 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1838         {
1839         ctx->app_verify_callback=cb;
1840         ctx->app_verify_arg=arg;
1841         }
1842
1843 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1844         {
1845         ctx->verify_mode=mode;
1846         ctx->default_verify_callback=cb;
1847         }
1848
1849 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1850         {
1851         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1852         }
1853
1854 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1855         {
1856         CERT_PKEY *cpk;
1857         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1858         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1859         int rsa_tmp_export,dh_tmp_export,kl;
1860         unsigned long mask_k,mask_a,emask_k,emask_a;
1861         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1862 #ifndef OPENSSL_NO_ECDH
1863         int have_ecdh_tmp;
1864 #endif
1865         X509 *x = NULL;
1866         EVP_PKEY *ecc_pkey = NULL;
1867         int signature_nid = 0, pk_nid = 0, md_nid = 0;
1868
1869         if (c == NULL) return;
1870
1871         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1872
1873 #ifndef OPENSSL_NO_RSA
1874         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1875         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1876                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1877 #else
1878         rsa_tmp=rsa_tmp_export=0;
1879 #endif
1880 #ifndef OPENSSL_NO_DH
1881         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1882         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1883                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1884 #else
1885         dh_tmp=dh_tmp_export=0;
1886 #endif
1887
1888 #ifndef OPENSSL_NO_ECDH
1889         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1890 #endif
1891         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1892         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1893         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1894         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1895         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1896         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1897         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1898         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1899         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1900         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1901         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1902 /* FIX THIS EAY EAY EAY */
1903         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1904         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1905         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1906         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1907         mask_k=0;
1908         mask_a=0;
1909         emask_k=0;
1910         emask_a=0;
1911
1912
1913
1914 #ifdef CIPHER_DEBUG
1915         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1916                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1917                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1918 #endif
1919
1920         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1921         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1922                 mask_k |= SSL_kGOST;
1923                 mask_a |= SSL_aGOST01;
1924         }
1925         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1926         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1927                 mask_k |= SSL_kGOST;
1928                 mask_a |= SSL_aGOST94;
1929         }
1930
1931         if (rsa_enc || (rsa_tmp && rsa_sign))
1932                 mask_k|=SSL_kRSA;
1933         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1934                 emask_k|=SSL_kRSA;
1935
1936 #if 0
1937         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1938         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1939                 (rsa_enc || rsa_sign || dsa_sign))
1940                 mask_k|=SSL_kEDH;
1941         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1942                 (rsa_enc || rsa_sign || dsa_sign))
1943                 emask_k|=SSL_kEDH;
1944 #endif
1945
1946         if (dh_tmp_export)
1947                 emask_k|=SSL_kEDH;
1948
1949         if (dh_tmp)
1950                 mask_k|=SSL_kEDH;
1951
1952         if (dh_rsa) mask_k|=SSL_kDHr;
1953         if (dh_rsa_export) emask_k|=SSL_kDHr;
1954
1955         if (dh_dsa) mask_k|=SSL_kDHd;
1956         if (dh_dsa_export) emask_k|=SSL_kDHd;
1957
1958         if (rsa_enc || rsa_sign)
1959                 {
1960                 mask_a|=SSL_aRSA;
1961                 emask_a|=SSL_aRSA;
1962                 }
1963
1964         if (dsa_sign)
1965                 {
1966                 mask_a|=SSL_aDSS;
1967                 emask_a|=SSL_aDSS;
1968                 }
1969
1970         mask_a|=SSL_aNULL;
1971         emask_a|=SSL_aNULL;
1972
1973 #ifndef OPENSSL_NO_KRB5
1974         mask_k|=SSL_kKRB5;
1975         mask_a|=SSL_aKRB5;
1976         emask_k|=SSL_kKRB5;
1977         emask_a|=SSL_aKRB5;
1978 #endif
1979
1980         /* An ECC certificate may be usable for ECDH and/or
1981          * ECDSA cipher suites depending on the key usage extension.
1982          */
1983         if (have_ecc_cert)
1984                 {
1985                 /* This call populates extension flags (ex_flags) */
1986                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1987                 X509_check_purpose(x, -1, 0);
1988                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1989                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1990                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1991                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1992                 ecc_pkey = X509_get_pubkey(x);
1993                 ecc_pkey_size = (ecc_pkey != NULL) ?
1994                     EVP_PKEY_bits(ecc_pkey) : 0;
1995                 EVP_PKEY_free(ecc_pkey);
1996                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1997                         {
1998                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1999                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2000                         }
2001 #ifndef OPENSSL_NO_ECDH
2002                 if (ecdh_ok)
2003                         {
2004
2005                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2006                                 {
2007                                 mask_k|=SSL_kECDHr;
2008                                 mask_a|=SSL_aECDH;
2009                                 if (ecc_pkey_size <= 163)
2010                                         {
2011                                         emask_k|=SSL_kECDHr;
2012                                         emask_a|=SSL_aECDH;
2013                                         }
2014                                 }
2015
2016                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2017                                 {
2018                                 mask_k|=SSL_kECDHe;
2019                                 mask_a|=SSL_aECDH;
2020                                 if (ecc_pkey_size <= 163)
2021                                         {
2022                                         emask_k|=SSL_kECDHe;
2023                                         emask_a|=SSL_aECDH;
2024                                         }
2025                                 }
2026                         }
2027 #endif
2028 #ifndef OPENSSL_NO_ECDSA
2029                 if (ecdsa_ok)
2030                         {
2031                         mask_a|=SSL_aECDSA;
2032                         emask_a|=SSL_aECDSA;
2033                         }
2034 #endif
2035                 }
2036
2037 #ifndef OPENSSL_NO_ECDH
2038         if (have_ecdh_tmp)
2039                 {
2040                 mask_k|=SSL_kEECDH;
2041                 emask_k|=SSL_kEECDH;
2042                 }
2043 #endif
2044
2045 #ifndef OPENSSL_NO_PSK
2046         mask_k |= SSL_kPSK;
2047         mask_a |= SSL_aPSK;
2048         emask_k |= SSL_kPSK;
2049         emask_a |= SSL_aPSK;
2050 #endif
2051
2052         c->mask_k=mask_k;
2053         c->mask_a=mask_a;
2054         c->export_mask_k=emask_k;
2055         c->export_mask_a=emask_a;
2056         c->valid=1;
2057         }
2058
2059 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2060 #define ku_reject(x, usage) \
2061         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2062
2063 #ifndef OPENSSL_NO_EC
2064
2065 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
2066         {
2067         unsigned long alg_k, alg_a;
2068         EVP_PKEY *pkey = NULL;
2069         int keysize = 0;
2070         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2071
2072         alg_k = cs->algorithm_mkey;
2073         alg_a = cs->algorithm_auth;
2074
2075         if (SSL_C_IS_EXPORT(cs))
2076                 {
2077                 /* ECDH key length in export ciphers must be <= 163 bits */
2078                 pkey = X509_get_pubkey(x);
2079                 if (pkey == NULL) return 0;
2080                 keysize = EVP_PKEY_bits(pkey);
2081                 EVP_PKEY_free(pkey);
2082                 if (keysize > 163) return 0;
2083                 }
2084
2085         /* This call populates the ex_flags field correctly */
2086         X509_check_purpose(x, -1, 0);
2087         if ((x->sig_alg) && (x->sig_alg->algorithm))
2088                 {
2089                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2090                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2091                 }
2092         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2093                 {
2094                 /* key usage, if present, must allow key agreement */
2095                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2096                         {
2097                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2098                         return 0;
2099                         }
2100                 if (alg_k & SSL_kECDHe)
2101                         {
2102                         /* signature alg must be ECDSA */
2103                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2104                                 {
2105                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2106                                 return 0;
2107                                 }
2108                         }
2109                 if (alg_k & SSL_kECDHr)
2110                         {
2111                         /* signature alg must be RSA */
2112
2113                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2114                                 {
2115                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2116                                 return 0;
2117                                 }
2118                         }
2119                 }
2120         if (alg_a & SSL_aECDSA)
2121                 {
2122                 /* key usage, if present, must allow signing */
2123                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2124                         {
2125                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2126                         return 0;
2127                         }
2128                 }
2129
2130         return 1;  /* all checks are ok */
2131         }
2132
2133 #endif
2134
2135 /* THIS NEEDS CLEANING UP */
2136 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2137         {
2138         unsigned long alg_k,alg_a;
2139         CERT *c;
2140         int i;
2141
2142         c=s->cert;
2143         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2144
2145         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2146         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2147
2148         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2149                 {
2150                 /* we don't need to look at SSL_kEECDH
2151                  * since no certificate is needed for
2152                  * anon ECDH and for authenticated
2153                  * EECDH, the check for the auth
2154                  * algorithm will set i correctly
2155                  * NOTE: For ECDH-RSA, we need an ECC
2156                  * not an RSA cert but for EECDH-RSA
2157                  * we need an RSA cert. Placing the
2158                  * checks for SSL_kECDH before RSA
2159                  * checks ensures the correct cert is chosen.
2160                  */
2161                 i=SSL_PKEY_ECC;
2162                 }
2163         else if (alg_a & SSL_aECDSA)
2164                 {
2165                 i=SSL_PKEY_ECC;
2166                 }
2167         else if (alg_k & SSL_kDHr)
2168                 i=SSL_PKEY_DH_RSA;
2169         else if (alg_k & SSL_kDHd)
2170                 i=SSL_PKEY_DH_DSA;
2171         else if (alg_a & SSL_aDSS)
2172                 i=SSL_PKEY_DSA_SIGN;
2173         else if (alg_a & SSL_aRSA)
2174                 {
2175                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2176                         i=SSL_PKEY_RSA_SIGN;
2177                 else
2178                         i=SSL_PKEY_RSA_ENC;
2179                 }
2180         else if (alg_a & SSL_aKRB5)
2181                 {
2182                 /* VRS something else here? */
2183                 return(NULL);
2184                 }
2185         else if (alg_a & SSL_aGOST94)
2186                 i=SSL_PKEY_GOST94;
2187         else if (alg_a & SSL_aGOST01)
2188                 i=SSL_PKEY_GOST01;
2189         else /* if (alg_a & SSL_aNULL) */
2190                 {
2191                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2192                 return(NULL);
2193                 }
2194
2195         return c->pkeys + i;
2196         }
2197
2198 X509 *ssl_get_server_send_cert(const SSL *s)
2199         {
2200         CERT_PKEY *cpk;
2201         cpk = ssl_get_server_send_pkey(s);
2202         if (!cpk)
2203                 return NULL;
2204         return cpk->x509;
2205         }
2206
2207 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2208         {
2209         unsigned long alg_a;
2210         CERT *c;
2211
2212         alg_a = cipher->algorithm_auth;
2213         c=s->cert;
2214
2215         if ((alg_a & SSL_aDSS) &&
2216                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2217                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2218         else if (alg_a & SSL_aRSA)
2219                 {
2220                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2221                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2222                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2223                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2224                 else
2225                         return(NULL);
2226                 }
2227         else if ((alg_a & SSL_aECDSA) &&
2228                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2229                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2230         else /* if (alg_a & SSL_aNULL) */
2231                 {
2232                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2233                 return(NULL);
2234                 }
2235         }
2236
2237 void ssl_update_cache(SSL *s,int mode)
2238         {
2239         int i;
2240
2241         /* If the session_id_length is 0, we are not supposed to cache it,
2242          * and it would be rather hard to do anyway :-) */
2243         if (s->session->session_id_length == 0) return;
2244
2245         i=s->session_ctx->session_cache_mode;
2246         if ((i & mode) && (!s->hit)
2247                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2248                     || SSL_CTX_add_session(s->session_ctx,s->session))
2249                 && (s->session_ctx->new_session_cb != NULL))
2250                 {
2251                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2252                 if (!s->session_ctx->new_session_cb(s,s->session))
2253                         SSL_SESSION_free(s->session);
2254                 }
2255
2256         /* auto flush every 255 connections */
2257         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2258                 ((i & mode) == mode))
2259                 {
2260                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2261                         ?s->session_ctx->stats.sess_connect_good
2262                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2263                         {
2264                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2265                         }
2266                 }
2267         }
2268
2269 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2270         {
2271         return(s->method);
2272         }
2273
2274 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2275         {
2276         int conn= -1;
2277         int ret=1;
2278
2279         if (s->method != meth)
2280                 {
2281                 if (s->handshake_func != NULL)
2282                         conn=(s->handshake_func == s->method->ssl_connect);
2283
2284                 if (s->method->version == meth->version)
2285                         s->method=meth;
2286                 else
2287                         {
2288                         s->method->ssl_free(s);
2289                         s->method=meth;
2290                         ret=s->method->ssl_new(s);
2291                         }
2292
2293                 if (conn == 1)
2294                         s->handshake_func=meth->ssl_connect;
2295                 else if (conn == 0)
2296                         s->handshake_func=meth->ssl_accept;
2297                 }
2298         return(ret);
2299         }
2300
2301 int SSL_get_error(const SSL *s,int i)
2302         {
2303         int reason;
2304         unsigned long l;
2305         BIO *bio;
2306
2307         if (i > 0) return(SSL_ERROR_NONE);
2308
2309         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2310          * etc, where we do encode the error */
2311         if ((l=ERR_peek_error()) != 0)
2312                 {
2313                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2314                         return(SSL_ERROR_SYSCALL);
2315                 else
2316                         return(SSL_ERROR_SSL);
2317                 }
2318
2319         if ((i < 0) && SSL_want_read(s))
2320                 {
2321                 bio=SSL_get_rbio(s);
2322                 if (BIO_should_read(bio))
2323                         return(SSL_ERROR_WANT_READ);
2324                 else if (BIO_should_write(bio))
2325                         /* This one doesn't make too much sense ... We never try
2326                          * to write to the rbio, and an application program where
2327                          * rbio and wbio are separate couldn't even know what it
2328                          * should wait for.
2329                          * However if we ever set s->rwstate incorrectly
2330                          * (so that we have SSL_want_read(s) instead of
2331                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2332                          * this test works around that bug; so it might be safer
2333                          * to keep it. */
2334                         return(SSL_ERROR_WANT_WRITE);
2335                 else if (BIO_should_io_special(bio))
2336                         {
2337                         reason=BIO_get_retry_reason(bio);
2338                         if (reason == BIO_RR_CONNECT)
2339                                 return(SSL_ERROR_WANT_CONNECT);
2340                         else if (reason == BIO_RR_ACCEPT)
2341                                 return(SSL_ERROR_WANT_ACCEPT);
2342                         else
2343                                 return(SSL_ERROR_SYSCALL); /* unknown */
2344                         }
2345                 }
2346
2347         if ((i < 0) && SSL_want_write(s))
2348                 {
2349                 bio=SSL_get_wbio(s);
2350                 if (BIO_should_write(bio))
2351                         return(SSL_ERROR_WANT_WRITE);
2352                 else if (BIO_should_read(bio))
2353                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2354                         return(SSL_ERROR_WANT_READ);
2355                 else if (BIO_should_io_special(bio))
2356                         {
2357                         reason=BIO_get_retry_reason(bio);
2358                         if (reason == BIO_RR_CONNECT)
2359                                 return(SSL_ERROR_WANT_CONNECT);
2360                         else if (reason == BIO_RR_ACCEPT)
2361                                 return(SSL_ERROR_WANT_ACCEPT);
2362                         else
2363                                 return(SSL_ERROR_SYSCALL);
2364                         }
2365                 }
2366         if ((i < 0) && SSL_want_x509_lookup(s))
2367                 {
2368                 return(SSL_ERROR_WANT_X509_LOOKUP);
2369                 }
2370
2371         if (i == 0)
2372                 {
2373                 if (s->version == SSL2_VERSION)
2374                         {
2375                         /* assume it is the socket being closed */
2376                         return(SSL_ERROR_ZERO_RETURN);
2377                         }
2378                 else
2379                         {
2380                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2381                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2382                                 return(SSL_ERROR_ZERO_RETURN);
2383                         }
2384                 }
2385         return(SSL_ERROR_SYSCALL);
2386         }
2387
2388 int SSL_do_handshake(SSL *s)
2389         {
2390         int ret=1;
2391
2392         if (s->handshake_func == NULL)
2393                 {
2394                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2395                 return(-1);
2396                 }
2397
2398         s->method->ssl_renegotiate_check(s);
2399
2400         if (SSL_in_init(s) || SSL_in_before(s))
2401                 {
2402                 ret=s->handshake_func(s);
2403                 }
2404         return(ret);
2405         }
2406
2407 /* For the next 2 functions, SSL_clear() sets shutdown and so
2408  * one of these calls will reset it */
2409 void SSL_set_accept_state(SSL *s)
2410         {
2411         s->server=1;
2412         s->shutdown=0;
2413         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2414         s->handshake_func=s->method->ssl_accept;
2415         /* clear the current cipher */
2416         ssl_clear_cipher_ctx(s);
2417         ssl_clear_hash_ctx(&s->read_hash);
2418         ssl_clear_hash_ctx(&s->write_hash);
2419         }
2420
2421 void SSL_set_connect_state(SSL *s)
2422         {
2423         s->server=0;
2424         s->shutdown=0;
2425         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2426         s->handshake_func=s->method->ssl_connect;
2427         /* clear the current cipher */
2428         ssl_clear_cipher_ctx(s);
2429         ssl_clear_hash_ctx(&s->read_hash);
2430         ssl_clear_hash_ctx(&s->write_hash);
2431         }
2432
2433 int ssl_undefined_function(SSL *s)
2434         {
2435         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2436         return(0);
2437         }
2438
2439 int ssl_undefined_void_function(void)
2440         {
2441         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2442         return(0);
2443         }
2444
2445 int ssl_undefined_const_function(const SSL *s)
2446         {
2447         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2448         return(0);
2449         }
2450
2451 SSL_METHOD *ssl_bad_method(int ver)
2452         {
2453         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2454         return(NULL);
2455         }
2456
2457 const char *SSL_get_version(const SSL *s)
2458         {
2459         if (s->version == TLS1_VERSION)
2460                 return("TLSv1");
2461         else if (s->version == SSL3_VERSION)
2462                 return("SSLv3");
2463         else if (s->version == SSL2_VERSION)
2464                 return("SSLv2");
2465         else
2466                 return("unknown");
2467         }
2468
2469 SSL *SSL_dup(SSL *s)
2470         {
2471         STACK_OF(X509_NAME) *sk;
2472         X509_NAME *xn;
2473         SSL *ret;
2474         int i;
2475
2476         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2477             return(NULL);
2478
2479         ret->version = s->version;
2480         ret->type = s->type;
2481         ret->method = s->method;
2482
2483         if (s->session != NULL)
2484                 {
2485                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2486                 SSL_copy_session_id(ret,s);
2487                 }
2488         else
2489                 {
2490                 /* No session has been established yet, so we have to expect
2491                  * that s->cert or ret->cert will be changed later --
2492                  * they should not both point to the same object,
2493                  * and thus we can't use SSL_copy_session_id. */
2494
2495                 ret->method->ssl_free(ret);
2496                 ret->method = s->method;
2497                 ret->method->ssl_new(ret);
2498
2499                 if (s->cert != NULL)
2500                         {
2501                         if (ret->cert != NULL)
2502                                 {
2503                                 ssl_cert_free(ret->cert);
2504                                 }
2505                         ret->cert = ssl_cert_dup(s->cert);
2506                         if (ret->cert == NULL)
2507                                 goto err;
2508                         }
2509
2510                 SSL_set_session_id_context(ret,
2511                         s->sid_ctx, s->sid_ctx_length);
2512                 }
2513
2514         ret->options=s->options;
2515         ret->mode=s->mode;
2516         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2517         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2518         ret->msg_callback = s->msg_callback;
2519         ret->msg_callback_arg = s->msg_callback_arg;
2520         SSL_set_verify(ret,SSL_get_verify_mode(s),
2521                 SSL_get_verify_callback(s));
2522         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2523         ret->generate_session_id = s->generate_session_id;
2524
2525         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2526
2527         ret->debug=s->debug;
2528
2529         /* copy app data, a little dangerous perhaps */
2530         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2531                 goto err;
2532
2533         /* setup rbio, and wbio */
2534         if (s->rbio != NULL)
2535                 {
2536                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2537                         goto err;
2538                 }
2539         if (s->wbio != NULL)
2540                 {
2541                 if (s->wbio != s->rbio)
2542                         {
2543                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2544                                 goto err;
2545                         }
2546                 else
2547                         ret->wbio=ret->rbio;
2548                 }
2549         ret->rwstate = s->rwstate;
2550         ret->in_handshake = s->in_handshake;
2551         ret->handshake_func = s->handshake_func;
2552         ret->server = s->server;
2553         ret->new_session = s->new_session;
2554         ret->quiet_shutdown = s->quiet_shutdown;
2555         ret->shutdown=s->shutdown;
2556         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2557         ret->rstate=s->rstate;
2558         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2559         ret->hit=s->hit;
2560
2561         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2562
2563         /* dup the cipher_list and cipher_list_by_id stacks */
2564         if (s->cipher_list != NULL)
2565                 {
2566                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2567                         goto err;
2568                 }
2569         if (s->cipher_list_by_id != NULL)
2570                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2571                         == NULL)
2572                         goto err;
2573
2574         /* Dup the client_CA list */
2575         if (s->client_CA != NULL)
2576                 {
2577                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2578                 ret->client_CA=sk;
2579                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2580                         {
2581                         xn=sk_X509_NAME_value(sk,i);
2582                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2583                                 {
2584                                 X509_NAME_free(xn);
2585                                 goto err;
2586                                 }
2587                         }
2588                 }
2589
2590         if (0)
2591                 {
2592 err:
2593                 if (ret != NULL) SSL_free(ret);
2594                 ret=NULL;
2595                 }
2596         return(ret);
2597         }
2598
2599 void ssl_clear_cipher_ctx(SSL *s)
2600         {
2601         if (s->enc_read_ctx != NULL)
2602                 {
2603                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2604                 OPENSSL_free(s->enc_read_ctx);
2605                 s->enc_read_ctx=NULL;
2606                 }
2607         if (s->enc_write_ctx != NULL)
2608                 {
2609                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2610                 OPENSSL_free(s->enc_write_ctx);
2611                 s->enc_write_ctx=NULL;
2612                 }
2613 #ifndef OPENSSL_NO_COMP
2614         if (s->expand != NULL)
2615                 {
2616                 COMP_CTX_free(s->expand);
2617                 s->expand=NULL;
2618                 }
2619         if (s->compress != NULL)
2620                 {
2621                 COMP_CTX_free(s->compress);
2622                 s->compress=NULL;
2623                 }
2624 #endif
2625         }
2626
2627 /* Fix this function so that it takes an optional type parameter */
2628 X509 *SSL_get_certificate(const SSL *s)
2629         {
2630         if (s->cert != NULL)
2631                 return(s->cert->key->x509);
2632         else
2633                 return(NULL);
2634         }
2635
2636 /* Fix this function so that it takes an optional type parameter */
2637 EVP_PKEY *SSL_get_privatekey(SSL *s)
2638         {
2639         if (s->cert != NULL)
2640                 return(s->cert->key->privatekey);
2641         else
2642                 return(NULL);
2643         }
2644
2645 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2646         {
2647         if ((s->session != NULL) && (s->session->cipher != NULL))
2648                 return(s->session->cipher);
2649         return(NULL);
2650         }
2651 #ifdef OPENSSL_NO_COMP
2652 const void *SSL_get_current_compression(SSL *s)
2653         {
2654         return NULL;
2655         }
2656 const void *SSL_get_current_expansion(SSL *s)
2657         {
2658         return NULL;
2659         }
2660 #else
2661
2662 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2663         {
2664         if (s->compress != NULL)
2665                 return(s->compress->meth);
2666         return(NULL);
2667         }
2668
2669 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2670         {
2671         if (s->expand != NULL)
2672                 return(s->expand->meth);
2673         return(NULL);
2674         }
2675 #endif
2676
2677 int ssl_init_wbio_buffer(SSL *s,int push)
2678         {
2679         BIO *bbio;
2680
2681         if (s->bbio == NULL)
2682                 {
2683                 bbio=BIO_new(BIO_f_buffer());
2684                 if (bbio == NULL) return(0);
2685                 s->bbio=bbio;
2686                 }
2687         else
2688                 {
2689                 bbio=s->bbio;
2690                 if (s->bbio == s->wbio)
2691                         s->wbio=BIO_pop(s->wbio);
2692                 }
2693         (void)BIO_reset(bbio);
2694 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2695         if (!BIO_set_read_buffer_size(bbio,1))
2696                 {
2697                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2698                 return(0);
2699                 }
2700         if (push)
2701                 {
2702                 if (s->wbio != bbio)
2703                         s->wbio=BIO_push(bbio,s->wbio);
2704                 }
2705         else
2706                 {
2707                 if (s->wbio == bbio)
2708                         s->wbio=BIO_pop(bbio);
2709                 }
2710         return(1);
2711         }
2712
2713 void ssl_free_wbio_buffer(SSL *s)
2714         {
2715         if (s->bbio == NULL) return;
2716
2717         if (s->bbio == s->wbio)
2718                 {
2719                 /* remove buffering */
2720                 s->wbio=BIO_pop(s->wbio);
2721 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2722                 assert(s->wbio != NULL);
2723 #endif
2724         }
2725         BIO_free(s->bbio);
2726         s->bbio=NULL;
2727         }
2728
2729 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2730         {
2731         ctx->quiet_shutdown=mode;
2732         }
2733
2734 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2735         {
2736         return(ctx->quiet_shutdown);
2737         }
2738
2739 void SSL_set_quiet_shutdown(SSL *s,int mode)
2740         {
2741         s->quiet_shutdown=mode;
2742         }
2743
2744 int SSL_get_quiet_shutdown(const SSL *s)
2745         {
2746         return(s->quiet_shutdown);
2747         }
2748
2749 void SSL_set_shutdown(SSL *s,int mode)
2750         {
2751         s->shutdown=mode;
2752         }
2753
2754 int SSL_get_shutdown(const SSL *s)
2755         {
2756         return(s->shutdown);
2757         }
2758
2759 int SSL_version(const SSL *s)
2760         {
2761         return(s->version);
2762         }
2763
2764 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2765         {
2766         return(ssl->ctx);
2767         }
2768
2769 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2770         {
2771         if (ssl->ctx == ctx)
2772                 return ssl->ctx;
2773 #ifndef OPENSSL_NO_TLSEXT
2774         if (ctx == NULL)
2775                 ctx = ssl->initial_ctx;
2776 #endif
2777         if (ssl->cert != NULL)
2778                 ssl_cert_free(ssl->cert);
2779         ssl->cert = ssl_cert_dup(ctx->cert);
2780         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2781         if (ssl->ctx != NULL)
2782                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2783         ssl->ctx = ctx;
2784         return(ssl->ctx);
2785         }
2786
2787 #ifndef OPENSSL_NO_STDIO
2788 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2789         {
2790         return(X509_STORE_set_default_paths(ctx->cert_store));
2791         }
2792
2793 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2794                 const char *CApath)
2795         {
2796         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2797         }
2798 #endif
2799
2800 void SSL_set_info_callback(SSL *ssl,
2801         void (*cb)(const SSL *ssl,int type,int val))
2802         {
2803         ssl->info_callback=cb;
2804         }
2805
2806 /* One compiler (Diab DCC) doesn't like argument names in returned
2807    function pointer.  */
2808 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2809         {
2810         return ssl->info_callback;
2811         }
2812
2813 int SSL_state(const SSL *ssl)
2814         {
2815         return(ssl->state);
2816         }
2817
2818 void SSL_set_verify_result(SSL *ssl,long arg)
2819         {
2820         ssl->verify_result=arg;
2821         }
2822
2823 long SSL_get_verify_result(const SSL *ssl)
2824         {
2825         return(ssl->verify_result);
2826         }
2827
2828 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2829                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2830         {
2831         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2832                                 new_func, dup_func, free_func);
2833         }
2834
2835 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2836         {
2837         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2838         }
2839
2840 void *SSL_get_ex_data(const SSL *s,int idx)
2841         {
2842         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2843         }
2844
2845 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2846                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2847         {
2848         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2849                                 new_func, dup_func, free_func);
2850         }
2851
2852 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2853         {
2854         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2855         }
2856
2857 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2858         {
2859         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2860         }
2861
2862 int ssl_ok(SSL *s)
2863         {
2864         return(1);
2865         }
2866
2867 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2868         {
2869         return(ctx->cert_store);
2870         }
2871
2872 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2873         {
2874         if (ctx->cert_store != NULL)
2875                 X509_STORE_free(ctx->cert_store);
2876         ctx->cert_store=store;
2877         }
2878
2879 int SSL_want(const SSL *s)
2880         {
2881         return(s->rwstate);
2882         }
2883
2884 /*!
2885  * \brief Set the callback for generating temporary RSA keys.
2886  * \param ctx the SSL context.
2887  * \param cb the callback
2888  */
2889
2890 #ifndef OPENSSL_NO_RSA
2891 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2892                                                           int is_export,
2893                                                           int keylength))
2894     {
2895     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2896     }
2897
2898 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2899                                                   int is_export,
2900                                                   int keylength))
2901     {
2902     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2903     }
2904 #endif
2905
2906 #ifdef DOXYGEN
2907 /*!
2908  * \brief The RSA temporary key callback function.
2909  * \param ssl the SSL session.
2910  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2911  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2912  * of the required key in bits.
2913  * \return the temporary RSA key.
2914  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2915  */
2916
2917 RSA *cb(SSL *ssl,int is_export,int keylength)
2918     {}
2919 #endif
2920
2921 /*!
2922  * \brief Set the callback for generating temporary DH keys.
2923  * \param ctx the SSL context.
2924  * \param dh the callback
2925  */
2926
2927 #ifndef OPENSSL_NO_DH
2928 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2929                                                         int keylength))
2930         {
2931         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2932         }
2933
2934 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2935                                                 int keylength))
2936         {
2937         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2938         }
2939 #endif
2940
2941 #ifndef OPENSSL_NO_ECDH
2942 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2943                                                                 int keylength))
2944         {
2945         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2946         }
2947
2948 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2949                                                         int keylength))
2950         {
2951         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2952         }
2953 #endif
2954
2955 #ifndef OPENSSL_NO_PSK
2956 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2957         {
2958         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2959                 {
2960                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2961                 return 0;
2962                 }
2963         if (ctx->psk_identity_hint != NULL)
2964                 OPENSSL_free(ctx->psk_identity_hint);
2965         if (identity_hint != NULL)
2966                 {
2967                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2968                 if (ctx->psk_identity_hint == NULL)
2969                         return 0;
2970                 }
2971         else
2972                 ctx->psk_identity_hint = NULL;
2973         return 1;
2974         }
2975
2976 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2977         {
2978         if (s == NULL)
2979                 return 0;
2980
2981         if (s->session == NULL)
2982                 return 1; /* session not created yet, ignored */
2983
2984         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2985                 {
2986                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2987                 return 0;
2988                 }
2989         if (s->session->psk_identity_hint != NULL)
2990                 OPENSSL_free(s->session->psk_identity_hint);
2991         if (identity_hint != NULL)
2992                 {
2993                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2994                 if (s->session->psk_identity_hint == NULL)
2995                         return 0;
2996                 }
2997         else
2998                 s->session->psk_identity_hint = NULL;
2999         return 1;
3000         }
3001
3002 const char *SSL_get_psk_identity_hint(const SSL *s)
3003         {
3004         if (s == NULL || s->session == NULL)
3005                 return NULL;
3006         return(s->session->psk_identity_hint);
3007         }
3008
3009 const char *SSL_get_psk_identity(const SSL *s)
3010         {
3011         if (s == NULL || s->session == NULL)
3012                 return NULL;
3013         return(s->session->psk_identity);
3014         }
3015
3016 void SSL_set_psk_client_callback(SSL *s,
3017     unsigned int (*cb)(SSL *ssl, const char *hint,
3018                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3019                        unsigned int max_psk_len))
3020         {
3021         s->psk_client_callback = cb;
3022         }
3023
3024 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3025     unsigned int (*cb)(SSL *ssl, const char *hint,
3026                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3027                        unsigned int max_psk_len))
3028         {
3029         ctx->psk_client_callback = cb;
3030         }
3031
3032 void SSL_set_psk_server_callback(SSL *s,
3033     unsigned int (*cb)(SSL *ssl, const char *identity,
3034                        unsigned char *psk, unsigned int max_psk_len))
3035         {
3036         s->psk_server_callback = cb;
3037         }
3038
3039 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3040     unsigned int (*cb)(SSL *ssl, const char *identity,
3041                        unsigned char *psk, unsigned int max_psk_len))
3042         {
3043         ctx->psk_server_callback = cb;
3044         }
3045 #endif
3046
3047 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))
3048         {
3049         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3050         }
3051 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))
3052         {
3053         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3054         }
3055
3056 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3057  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3058  * any. If EVP_MD pointer is passed, initializes ctx with this md
3059  * Returns newly allocated ctx;
3060  */
3061
3062 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3063 {
3064         ssl_clear_hash_ctx(hash);
3065         *hash = EVP_MD_CTX_create();
3066         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3067         return *hash;
3068 }
3069 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3070 {
3071
3072         if (*hash) EVP_MD_CTX_destroy(*hash);
3073         *hash=NULL;
3074 }
3075
3076 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3077 #include "../crypto/bio/bss_file.c"
3078 #endif
3079
3080 IMPLEMENT_STACK_OF(SSL_CIPHER)
3081 IMPLEMENT_STACK_OF(SSL_COMP)
3082 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3083                                     ssl_cipher_id);