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_MTU:
1057                 if (SSL_version(s) == DTLS1_VERSION ||
1058                     SSL_version(s) == DTLS1_BAD_VER)
1059                         {
1060                         s->d1->mtu = larg;
1061                         return larg;
1062                         }
1063                 return 0;
1064         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1065                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1066                         return 0;
1067                 s->max_send_fragment = larg;
1068                 return 1;
1069         case SSL_CTRL_GET_RI_SUPPORT:
1070                 if (s->s3)
1071                         return s->s3->send_connection_binding;
1072                 else return 0;
1073         default:
1074                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1075                 }
1076         }
1077
1078 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1079         {
1080         switch(cmd)
1081                 {
1082         case SSL_CTRL_SET_MSG_CALLBACK:
1083                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1084                 return 1;
1085
1086         default:
1087                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1088                 }
1089         }
1090
1091 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1092         {
1093         return ctx->sessions;
1094         }
1095
1096 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1097         {
1098         long l;
1099
1100         switch (cmd)
1101                 {
1102         case SSL_CTRL_GET_READ_AHEAD:
1103                 return(ctx->read_ahead);
1104         case SSL_CTRL_SET_READ_AHEAD:
1105                 l=ctx->read_ahead;
1106                 ctx->read_ahead=larg;
1107                 return(l);
1108
1109         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1110                 ctx->msg_callback_arg = parg;
1111                 return 1;
1112
1113         case SSL_CTRL_GET_MAX_CERT_LIST:
1114                 return(ctx->max_cert_list);
1115         case SSL_CTRL_SET_MAX_CERT_LIST:
1116                 l=ctx->max_cert_list;
1117                 ctx->max_cert_list=larg;
1118                 return(l);
1119
1120         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1121                 l=ctx->session_cache_size;
1122                 ctx->session_cache_size=larg;
1123                 return(l);
1124         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1125                 return(ctx->session_cache_size);
1126         case SSL_CTRL_SET_SESS_CACHE_MODE:
1127                 l=ctx->session_cache_mode;
1128                 ctx->session_cache_mode=larg;
1129                 return(l);
1130         case SSL_CTRL_GET_SESS_CACHE_MODE:
1131                 return(ctx->session_cache_mode);
1132
1133         case SSL_CTRL_SESS_NUMBER:
1134                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1135         case SSL_CTRL_SESS_CONNECT:
1136                 return(ctx->stats.sess_connect);
1137         case SSL_CTRL_SESS_CONNECT_GOOD:
1138                 return(ctx->stats.sess_connect_good);
1139         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1140                 return(ctx->stats.sess_connect_renegotiate);
1141         case SSL_CTRL_SESS_ACCEPT:
1142                 return(ctx->stats.sess_accept);
1143         case SSL_CTRL_SESS_ACCEPT_GOOD:
1144                 return(ctx->stats.sess_accept_good);
1145         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1146                 return(ctx->stats.sess_accept_renegotiate);
1147         case SSL_CTRL_SESS_HIT:
1148                 return(ctx->stats.sess_hit);
1149         case SSL_CTRL_SESS_CB_HIT:
1150                 return(ctx->stats.sess_cb_hit);
1151         case SSL_CTRL_SESS_MISSES:
1152                 return(ctx->stats.sess_miss);
1153         case SSL_CTRL_SESS_TIMEOUTS:
1154                 return(ctx->stats.sess_timeout);
1155         case SSL_CTRL_SESS_CACHE_FULL:
1156                 return(ctx->stats.sess_cache_full);
1157         case SSL_CTRL_OPTIONS:
1158                 return(ctx->options|=larg);
1159         case SSL_CTRL_CLEAR_OPTIONS:
1160                 return(ctx->options&=~larg);
1161         case SSL_CTRL_MODE:
1162                 return(ctx->mode|=larg);
1163         case SSL_CTRL_CLEAR_MODE:
1164                 return(ctx->mode&=~larg);
1165         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1166                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1167                         return 0;
1168                 ctx->max_send_fragment = larg;
1169                 return 1;
1170         default:
1171                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1172                 }
1173         }
1174
1175 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1176         {
1177         switch(cmd)
1178                 {
1179         case SSL_CTRL_SET_MSG_CALLBACK:
1180                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1181                 return 1;
1182
1183         default:
1184                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1185                 }
1186         }
1187
1188 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1189         {
1190         long l;
1191
1192         l=a->id-b->id;
1193         if (l == 0L)
1194                 return(0);
1195         else
1196                 return((l > 0)?1:-1);
1197         }
1198
1199 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1200                         const SSL_CIPHER * const *bp)
1201         {
1202         long l;
1203
1204         l=(*ap)->id-(*bp)->id;
1205         if (l == 0L)
1206                 return(0);
1207         else
1208                 return((l > 0)?1:-1);
1209         }
1210
1211 /** return a STACK of the ciphers available for the SSL and in order of
1212  * preference */
1213 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1214         {
1215         if (s != NULL)
1216                 {
1217                 if (s->cipher_list != NULL)
1218                         {
1219                         return(s->cipher_list);
1220                         }
1221                 else if ((s->ctx != NULL) &&
1222                         (s->ctx->cipher_list != NULL))
1223                         {
1224                         return(s->ctx->cipher_list);
1225                         }
1226                 }
1227         return(NULL);
1228         }
1229
1230 /** return a STACK of the ciphers available for the SSL and in order of
1231  * algorithm id */
1232 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1233         {
1234         if (s != NULL)
1235                 {
1236                 if (s->cipher_list_by_id != NULL)
1237                         {
1238                         return(s->cipher_list_by_id);
1239                         }
1240                 else if ((s->ctx != NULL) &&
1241                         (s->ctx->cipher_list_by_id != NULL))
1242                         {
1243                         return(s->ctx->cipher_list_by_id);
1244                         }
1245                 }
1246         return(NULL);
1247         }
1248
1249 /** The old interface to get the same thing as SSL_get_ciphers() */
1250 const char *SSL_get_cipher_list(const SSL *s,int n)
1251         {
1252         SSL_CIPHER *c;
1253         STACK_OF(SSL_CIPHER) *sk;
1254
1255         if (s == NULL) return(NULL);
1256         sk=SSL_get_ciphers(s);
1257         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1258                 return(NULL);
1259         c=sk_SSL_CIPHER_value(sk,n);
1260         if (c == NULL) return(NULL);
1261         return(c->name);
1262         }
1263
1264 /** specify the ciphers to be used by default by the SSL_CTX */
1265 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1266         {
1267         STACK_OF(SSL_CIPHER) *sk;
1268
1269         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1270                 &ctx->cipher_list_by_id,str);
1271         /* ssl_create_cipher_list may return an empty stack if it
1272          * was unable to find a cipher matching the given rule string
1273          * (for example if the rule string specifies a cipher which
1274          * has been disabled). This is not an error as far as
1275          * ssl_create_cipher_list is concerned, and hence
1276          * ctx->cipher_list and ctx->cipher_list_by_id has been
1277          * updated. */
1278         if (sk == NULL)
1279                 return 0;
1280         else if (sk_SSL_CIPHER_num(sk) == 0)
1281                 {
1282                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1283                 return 0;
1284                 }
1285         return 1;
1286         }
1287
1288 /** specify the ciphers to be used by the SSL */
1289 int SSL_set_cipher_list(SSL *s,const char *str)
1290         {
1291         STACK_OF(SSL_CIPHER) *sk;
1292
1293         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1294                 &s->cipher_list_by_id,str);
1295         /* see comment in SSL_CTX_set_cipher_list */
1296         if (sk == NULL)
1297                 return 0;
1298         else if (sk_SSL_CIPHER_num(sk) == 0)
1299                 {
1300                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1301                 return 0;
1302                 }
1303         return 1;
1304         }
1305
1306 /* works well for SSLv2, not so good for SSLv3 */
1307 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1308         {
1309         char *p;
1310         STACK_OF(SSL_CIPHER) *sk;
1311         SSL_CIPHER *c;
1312         int i;
1313
1314         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1315                 (len < 2))
1316                 return(NULL);
1317
1318         p=buf;
1319         sk=s->session->ciphers;
1320         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1321                 {
1322                 int n;
1323
1324                 c=sk_SSL_CIPHER_value(sk,i);
1325                 n=strlen(c->name);
1326                 if (n+1 > len)
1327                         {
1328                         if (p != buf)
1329                                 --p;
1330                         *p='\0';
1331                         return buf;
1332                         }
1333                 strcpy(p,c->name);
1334                 p+=n;
1335                 *(p++)=':';
1336                 len-=n+1;
1337                 }
1338         p[-1]='\0';
1339         return(buf);
1340         }
1341
1342 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1343                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1344         {
1345         int i,j=0;
1346         SSL_CIPHER *c;
1347         unsigned char *q;
1348 #ifndef OPENSSL_NO_KRB5
1349         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1350 #endif /* OPENSSL_NO_KRB5 */
1351
1352         if (sk == NULL) return(0);
1353         q=p;
1354
1355         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1356                 {
1357                 c=sk_SSL_CIPHER_value(sk,i);
1358 #ifndef OPENSSL_NO_KRB5
1359                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1360                     nokrb5)
1361                     continue;
1362 #endif /* OPENSSL_NO_KRB5 */
1363 #ifndef OPENSSL_NO_PSK
1364                 /* with PSK there must be client callback set */
1365                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1366                     s->psk_client_callback == NULL)
1367                         continue;
1368 #endif /* OPENSSL_NO_PSK */
1369                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1370                 p+=j;
1371                 }
1372         /* If p == q, no ciphers and caller indicates an error. Otherwise
1373          * add SCSV if not renegotiating.
1374          */
1375         if (p != q && !s->new_session)
1376                 {
1377                 static SSL_CIPHER scsv =
1378                         {
1379                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1380                         };
1381                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1382                 p+=j;
1383 #ifdef OPENSSL_RI_DEBUG
1384                 fprintf(stderr, "SCSV sent by client\n");
1385 #endif
1386                 }
1387
1388         return(p-q);
1389         }
1390
1391 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1392                                                STACK_OF(SSL_CIPHER) **skp)
1393         {
1394         const SSL_CIPHER *c;
1395         STACK_OF(SSL_CIPHER) *sk;
1396         int i,n;
1397         if (s->s3)
1398                 s->s3->send_connection_binding = 0;
1399
1400         n=ssl_put_cipher_by_char(s,NULL,NULL);
1401         if ((num%n) != 0)
1402                 {
1403                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1404                 return(NULL);
1405                 }
1406         if ((skp == NULL) || (*skp == NULL))
1407                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1408         else
1409                 {
1410                 sk= *skp;
1411                 sk_SSL_CIPHER_zero(sk);
1412                 }
1413
1414         for (i=0; i<num; i+=n)
1415                 {
1416                 /* Check for SCSV */
1417                 if (s->s3 && (n != 3 || !p[0]) &&
1418                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1419                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1420                         {
1421                         /* SCSV fatal if renegotiating */
1422                         if (s->new_session)
1423                                 {
1424                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1425                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1426                                 goto err;
1427                                 }
1428                         s->s3->send_connection_binding = 1;
1429                         p += n;
1430 #ifdef OPENSSL_RI_DEBUG
1431                         fprintf(stderr, "SCSV received by server\n");
1432 #endif
1433                         continue;
1434                         }
1435
1436                 c=ssl_get_cipher_by_char(s,p);
1437                 p+=n;
1438                 if (c != NULL)
1439                         {
1440                         if (!sk_SSL_CIPHER_push(sk,c))
1441                                 {
1442                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1443                                 goto err;
1444                                 }
1445                         }
1446                 }
1447
1448         if (skp != NULL)
1449                 *skp=sk;
1450         return(sk);
1451 err:
1452         if ((skp == NULL) || (*skp == NULL))
1453                 sk_SSL_CIPHER_free(sk);
1454         return(NULL);
1455         }
1456
1457
1458 #ifndef OPENSSL_NO_TLSEXT
1459 /** return a servername extension value if provided in Client Hello, or NULL.
1460  * So far, only host_name types are defined (RFC 3546).
1461  */
1462
1463 const char *SSL_get_servername(const SSL *s, const int type)
1464         {
1465         if (type != TLSEXT_NAMETYPE_host_name)
1466                 return NULL;
1467
1468         return s->session && !s->tlsext_hostname ?
1469                 s->session->tlsext_hostname :
1470                 s->tlsext_hostname;
1471         }
1472
1473 int SSL_get_servername_type(const SSL *s)
1474         {
1475         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1476                 return TLSEXT_NAMETYPE_host_name;
1477         return -1;
1478         }
1479 #endif
1480
1481 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1482         {
1483         unsigned long l;
1484
1485         l=(unsigned long)
1486                 ((unsigned int) a->session_id[0]     )|
1487                 ((unsigned int) a->session_id[1]<< 8L)|
1488                 ((unsigned long)a->session_id[2]<<16L)|
1489                 ((unsigned long)a->session_id[3]<<24L);
1490         return(l);
1491         }
1492
1493 /* NB: If this function (or indeed the hash function which uses a sort of
1494  * coarser function than this one) is changed, ensure
1495  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1496  * able to construct an SSL_SESSION that will collide with any existing session
1497  * with a matching session ID. */
1498 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1499         {
1500         if (a->ssl_version != b->ssl_version)
1501                 return(1);
1502         if (a->session_id_length != b->session_id_length)
1503                 return(1);
1504         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1505         }
1506
1507 /* These wrapper functions should remain rather than redeclaring
1508  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1509  * variable. The reason is that the functions aren't static, they're exposed via
1510  * ssl.h. */
1511 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1512 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1513
1514 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1515         {
1516         SSL_CTX *ret=NULL;
1517
1518         if (meth == NULL)
1519                 {
1520                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1521                 return(NULL);
1522                 }
1523
1524         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1525                 {
1526                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1527                 goto err;
1528                 }
1529         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1530         if (ret == NULL)
1531                 goto err;
1532
1533         memset(ret,0,sizeof(SSL_CTX));
1534
1535         ret->method=meth;
1536
1537         ret->cert_store=NULL;
1538         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1539         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1540         ret->session_cache_head=NULL;
1541         ret->session_cache_tail=NULL;
1542
1543         /* We take the system default */
1544         ret->session_timeout=meth->get_timeout();
1545
1546         ret->new_session_cb=0;
1547         ret->remove_session_cb=0;
1548         ret->get_session_cb=0;
1549         ret->generate_session_id=0;
1550
1551         memset((char *)&ret->stats,0,sizeof(ret->stats));
1552
1553         ret->references=1;
1554         ret->quiet_shutdown=0;
1555
1556 /*      ret->cipher=NULL;*/
1557 /*      ret->s2->challenge=NULL;
1558         ret->master_key=NULL;
1559         ret->key_arg=NULL;
1560         ret->s2->conn_id=NULL; */
1561
1562         ret->info_callback=NULL;
1563
1564         ret->app_verify_callback=0;
1565         ret->app_verify_arg=NULL;
1566
1567         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1568         ret->read_ahead=0;
1569         ret->msg_callback=0;
1570         ret->msg_callback_arg=NULL;
1571         ret->verify_mode=SSL_VERIFY_NONE;
1572 #if 0
1573         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1574 #endif
1575         ret->sid_ctx_length=0;
1576         ret->default_verify_callback=NULL;
1577         if ((ret->cert=ssl_cert_new()) == NULL)
1578                 goto err;
1579
1580         ret->default_passwd_callback=0;
1581         ret->default_passwd_callback_userdata=NULL;
1582         ret->client_cert_cb=0;
1583         ret->app_gen_cookie_cb=0;
1584         ret->app_verify_cookie_cb=0;
1585
1586         ret->sessions=lh_SSL_SESSION_new();
1587         if (ret->sessions == NULL) goto err;
1588         ret->cert_store=X509_STORE_new();
1589         if (ret->cert_store == NULL) goto err;
1590
1591         ssl_create_cipher_list(ret->method,
1592                 &ret->cipher_list,&ret->cipher_list_by_id,
1593                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1594         if (ret->cipher_list == NULL
1595             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1596                 {
1597                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1598                 goto err2;
1599                 }
1600
1601         ret->param = X509_VERIFY_PARAM_new();
1602         if (!ret->param)
1603                 goto err;
1604
1605         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1606                 {
1607                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1608                 goto err2;
1609                 }
1610         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1611                 {
1612                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1613                 goto err2;
1614                 }
1615         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1616                 {
1617                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1618                 goto err2;
1619                 }
1620
1621         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1622                 goto err;
1623
1624         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1625
1626         ret->extra_certs=NULL;
1627         ret->comp_methods=SSL_COMP_get_compression_methods();
1628
1629         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1630
1631 #ifndef OPENSSL_NO_TLSEXT
1632         ret->tlsext_servername_callback = 0;
1633         ret->tlsext_servername_arg = NULL;
1634         /* Setup RFC4507 ticket keys */
1635         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1636                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1637                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1638                 ret->options |= SSL_OP_NO_TICKET;
1639
1640         ret->tlsext_status_cb = 0;
1641         ret->tlsext_status_arg = NULL;
1642
1643 #endif
1644 #ifndef OPENSSL_NO_PSK
1645         ret->psk_identity_hint=NULL;
1646         ret->psk_client_callback=NULL;
1647         ret->psk_server_callback=NULL;
1648 #endif
1649 #ifndef OPENSSL_NO_BUF_FREELISTS
1650         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1651         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1652         if (!ret->rbuf_freelist)
1653                 goto err;
1654         ret->rbuf_freelist->chunklen = 0;
1655         ret->rbuf_freelist->len = 0;
1656         ret->rbuf_freelist->head = NULL;
1657         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1658         if (!ret->wbuf_freelist)
1659                 {
1660                 OPENSSL_free(ret->rbuf_freelist);
1661                 goto err;
1662                 }
1663         ret->wbuf_freelist->chunklen = 0;
1664         ret->wbuf_freelist->len = 0;
1665         ret->wbuf_freelist->head = NULL;
1666 #endif
1667 #ifndef OPENSSL_NO_ENGINE
1668         ret->client_cert_engine = NULL;
1669 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1670 #define eng_strx(x)     #x
1671 #define eng_str(x)      eng_strx(x)
1672         /* Use specific client engine automatically... ignore errors */
1673         {
1674         ENGINE *eng;
1675         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1676         if (!eng)
1677                 {
1678                 ERR_clear_error();
1679                 ENGINE_load_builtin_engines();
1680                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1681                 }
1682         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1683                 ERR_clear_error();
1684         }
1685 #endif
1686 #endif
1687         /* Default is to connect to non-RI servers. When RI is more widely
1688          * deployed might change this.
1689          */
1690         ret->options = SSL_OP_LEGACY_SERVER_CONNECT;
1691
1692         return(ret);
1693 err:
1694         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1695 err2:
1696         if (ret != NULL) SSL_CTX_free(ret);
1697         return(NULL);
1698         }
1699
1700 #if 0
1701 static void SSL_COMP_free(SSL_COMP *comp)
1702     { OPENSSL_free(comp); }
1703 #endif
1704
1705 #ifndef OPENSSL_NO_BUF_FREELISTS
1706 static void
1707 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1708         {
1709         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1710         for (ent = list->head; ent; ent = next)
1711                 {
1712                 next = ent->next;
1713                 OPENSSL_free(ent);
1714                 }
1715         OPENSSL_free(list);
1716         }
1717 #endif
1718
1719 void SSL_CTX_free(SSL_CTX *a)
1720         {
1721         int i;
1722
1723         if (a == NULL) return;
1724
1725         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1726 #ifdef REF_PRINT
1727         REF_PRINT("SSL_CTX",a);
1728 #endif
1729         if (i > 0) return;
1730 #ifdef REF_CHECK
1731         if (i < 0)
1732                 {
1733                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1734                 abort(); /* ok */
1735                 }
1736 #endif
1737
1738         if (a->param)
1739                 X509_VERIFY_PARAM_free(a->param);
1740
1741         /*
1742          * Free internal session cache. However: the remove_cb() may reference
1743          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1744          * after the sessions were flushed.
1745          * As the ex_data handling routines might also touch the session cache,
1746          * the most secure solution seems to be: empty (flush) the cache, then
1747          * free ex_data, then finally free the cache.
1748          * (See ticket [openssl.org #212].)
1749          */
1750         if (a->sessions != NULL)
1751                 SSL_CTX_flush_sessions(a,0);
1752
1753         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1754
1755         if (a->sessions != NULL)
1756                 lh_SSL_SESSION_free(a->sessions);
1757
1758         if (a->cert_store != NULL)
1759                 X509_STORE_free(a->cert_store);
1760         if (a->cipher_list != NULL)
1761                 sk_SSL_CIPHER_free(a->cipher_list);
1762         if (a->cipher_list_by_id != NULL)
1763                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1764         if (a->cert != NULL)
1765                 ssl_cert_free(a->cert);
1766         if (a->client_CA != NULL)
1767                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1768         if (a->extra_certs != NULL)
1769                 sk_X509_pop_free(a->extra_certs,X509_free);
1770 #if 0 /* This should never be done, since it removes a global database */
1771         if (a->comp_methods != NULL)
1772                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1773 #else
1774         a->comp_methods = NULL;
1775 #endif
1776
1777 #ifndef OPENSSL_NO_PSK
1778         if (a->psk_identity_hint)
1779                 OPENSSL_free(a->psk_identity_hint);
1780 #endif
1781 #ifndef OPENSSL_NO_ENGINE
1782         if (a->client_cert_engine)
1783                 ENGINE_finish(a->client_cert_engine);
1784 #endif
1785
1786 #ifndef OPENSSL_NO_BUF_FREELISTS
1787         if (a->wbuf_freelist)
1788                 ssl_buf_freelist_free(a->wbuf_freelist);
1789         if (a->rbuf_freelist)
1790                 ssl_buf_freelist_free(a->rbuf_freelist);
1791 #endif
1792
1793         OPENSSL_free(a);
1794         }
1795
1796 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1797         {
1798         ctx->default_passwd_callback=cb;
1799         }
1800
1801 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1802         {
1803         ctx->default_passwd_callback_userdata=u;
1804         }
1805
1806 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1807         {
1808         ctx->app_verify_callback=cb;
1809         ctx->app_verify_arg=arg;
1810         }
1811
1812 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1813         {
1814         ctx->verify_mode=mode;
1815         ctx->default_verify_callback=cb;
1816         }
1817
1818 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1819         {
1820         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1821         }
1822
1823 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1824         {
1825         CERT_PKEY *cpk;
1826         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1827         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1828         int rsa_tmp_export,dh_tmp_export,kl;
1829         unsigned long mask_k,mask_a,emask_k,emask_a;
1830         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1831 #ifndef OPENSSL_NO_ECDH
1832         int have_ecdh_tmp;
1833 #endif
1834         X509 *x = NULL;
1835         EVP_PKEY *ecc_pkey = NULL;
1836         int signature_nid = 0;
1837
1838         if (c == NULL) return;
1839
1840         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1841
1842 #ifndef OPENSSL_NO_RSA
1843         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1844         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1845                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1846 #else
1847         rsa_tmp=rsa_tmp_export=0;
1848 #endif
1849 #ifndef OPENSSL_NO_DH
1850         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1851         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1852                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1853 #else
1854         dh_tmp=dh_tmp_export=0;
1855 #endif
1856
1857 #ifndef OPENSSL_NO_ECDH
1858         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1859 #endif
1860         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1861         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1862         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1863         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1864         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1865         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1866         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1867         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1868         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1869         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1870         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1871 /* FIX THIS EAY EAY EAY */
1872         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1873         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1874         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1875         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1876         mask_k=0;
1877         mask_a=0;
1878         emask_k=0;
1879         emask_a=0;
1880
1881
1882
1883 #ifdef CIPHER_DEBUG
1884         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1885                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1886                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1887 #endif
1888
1889         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1890         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1891                 mask_k |= SSL_kGOST;
1892                 mask_a |= SSL_aGOST01;
1893         }
1894         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1895         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1896                 mask_k |= SSL_kGOST;
1897                 mask_a |= SSL_aGOST94;
1898         }
1899
1900         if (rsa_enc || (rsa_tmp && rsa_sign))
1901                 mask_k|=SSL_kRSA;
1902         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1903                 emask_k|=SSL_kRSA;
1904
1905 #if 0
1906         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1907         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1908                 (rsa_enc || rsa_sign || dsa_sign))
1909                 mask_k|=SSL_kEDH;
1910         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1911                 (rsa_enc || rsa_sign || dsa_sign))
1912                 emask_k|=SSL_kEDH;
1913 #endif
1914
1915         if (dh_tmp_export)
1916                 emask_k|=SSL_kEDH;
1917
1918         if (dh_tmp)
1919                 mask_k|=SSL_kEDH;
1920
1921         if (dh_rsa) mask_k|=SSL_kDHr;
1922         if (dh_rsa_export) emask_k|=SSL_kDHr;
1923
1924         if (dh_dsa) mask_k|=SSL_kDHd;
1925         if (dh_dsa_export) emask_k|=SSL_kDHd;
1926
1927         if (rsa_enc || rsa_sign)
1928                 {
1929                 mask_a|=SSL_aRSA;
1930                 emask_a|=SSL_aRSA;
1931                 }
1932
1933         if (dsa_sign)
1934                 {
1935                 mask_a|=SSL_aDSS;
1936                 emask_a|=SSL_aDSS;
1937                 }
1938
1939         mask_a|=SSL_aNULL;
1940         emask_a|=SSL_aNULL;
1941
1942 #ifndef OPENSSL_NO_KRB5
1943         mask_k|=SSL_kKRB5;
1944         mask_a|=SSL_aKRB5;
1945         emask_k|=SSL_kKRB5;
1946         emask_a|=SSL_aKRB5;
1947 #endif
1948
1949         /* An ECC certificate may be usable for ECDH and/or
1950          * ECDSA cipher suites depending on the key usage extension.
1951          */
1952         if (have_ecc_cert)
1953                 {
1954                 /* This call populates extension flags (ex_flags) */
1955                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1956                 X509_check_purpose(x, -1, 0);
1957                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1958                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1959                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1960                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1961                 ecc_pkey = X509_get_pubkey(x);
1962                 ecc_pkey_size = (ecc_pkey != NULL) ?
1963                     EVP_PKEY_bits(ecc_pkey) : 0;
1964                 EVP_PKEY_free(ecc_pkey);
1965                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1966                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1967 #ifndef OPENSSL_NO_ECDH
1968                 if (ecdh_ok)
1969                         {
1970                         const char *sig = OBJ_nid2ln(signature_nid);
1971                         if (sig == NULL)
1972                                 {
1973                                 ERR_clear_error();
1974                                 sig = "unknown";
1975                                 }
1976
1977                         if (strstr(sig, "WithRSA"))
1978                                 {
1979                                 mask_k|=SSL_kECDHr;
1980                                 mask_a|=SSL_aECDH;
1981                                 if (ecc_pkey_size <= 163)
1982                                         {
1983                                         emask_k|=SSL_kECDHr;
1984                                         emask_a|=SSL_aECDH;
1985                                         }
1986                                 }
1987
1988                         if (signature_nid == NID_ecdsa_with_SHA1)
1989                                 {
1990                                 mask_k|=SSL_kECDHe;
1991                                 mask_a|=SSL_aECDH;
1992                                 if (ecc_pkey_size <= 163)
1993                                         {
1994                                         emask_k|=SSL_kECDHe;
1995                                         emask_a|=SSL_aECDH;
1996                                         }
1997                                 }
1998                         }
1999 #endif
2000 #ifndef OPENSSL_NO_ECDSA
2001                 if (ecdsa_ok)
2002                         {
2003                         mask_a|=SSL_aECDSA;
2004                         emask_a|=SSL_aECDSA;
2005                         }
2006 #endif
2007                 }
2008
2009 #ifndef OPENSSL_NO_ECDH
2010         if (have_ecdh_tmp)
2011                 {
2012                 mask_k|=SSL_kEECDH;
2013                 emask_k|=SSL_kEECDH;
2014                 }
2015 #endif
2016
2017 #ifndef OPENSSL_NO_PSK
2018         mask_k |= SSL_kPSK;
2019         mask_a |= SSL_aPSK;
2020         emask_k |= SSL_kPSK;
2021         emask_a |= SSL_aPSK;
2022 #endif
2023
2024         c->mask_k=mask_k;
2025         c->mask_a=mask_a;
2026         c->export_mask_k=emask_k;
2027         c->export_mask_a=emask_a;
2028         c->valid=1;
2029         }
2030
2031 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2032 #define ku_reject(x, usage) \
2033         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2034
2035 #ifndef OPENSSL_NO_EC
2036
2037 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
2038         {
2039         unsigned long alg_k, alg_a;
2040         EVP_PKEY *pkey = NULL;
2041         int keysize = 0;
2042         int signature_nid = 0;
2043
2044         alg_k = cs->algorithm_mkey;
2045         alg_a = cs->algorithm_auth;
2046
2047         if (SSL_C_IS_EXPORT(cs))
2048                 {
2049                 /* ECDH key length in export ciphers must be <= 163 bits */
2050                 pkey = X509_get_pubkey(x);
2051                 if (pkey == NULL) return 0;
2052                 keysize = EVP_PKEY_bits(pkey);
2053                 EVP_PKEY_free(pkey);
2054                 if (keysize > 163) return 0;
2055                 }
2056
2057         /* This call populates the ex_flags field correctly */
2058         X509_check_purpose(x, -1, 0);
2059         if ((x->sig_alg) && (x->sig_alg->algorithm))
2060                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2061         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2062                 {
2063                 /* key usage, if present, must allow key agreement */
2064                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2065                         {
2066                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2067                         return 0;
2068                         }
2069                 if (alg_k & SSL_kECDHe)
2070                         {
2071                         /* signature alg must be ECDSA */
2072                         if (signature_nid != NID_ecdsa_with_SHA1)
2073                                 {
2074                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2075                                 return 0;
2076                                 }
2077                         }
2078                 if (alg_k & SSL_kECDHr)
2079                         {
2080                         /* signature alg must be RSA */
2081
2082                         const char *sig = OBJ_nid2ln(signature_nid);
2083                         if (sig == NULL)
2084                                 {
2085                                 ERR_clear_error();
2086                                 sig = "unknown";
2087                                 }
2088                         if (strstr(sig, "WithRSA") == NULL)
2089                                 {
2090                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2091                                 return 0;
2092                                 }
2093                         }
2094                 }
2095         if (alg_a & SSL_aECDSA)
2096                 {
2097                 /* key usage, if present, must allow signing */
2098                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2099                         {
2100                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2101                         return 0;
2102                         }
2103                 }
2104
2105         return 1;  /* all checks are ok */
2106         }
2107
2108 #endif
2109
2110 /* THIS NEEDS CLEANING UP */
2111 X509 *ssl_get_server_send_cert(SSL *s)
2112         {
2113         unsigned long alg_k,alg_a,mask_k,mask_a;
2114         CERT *c;
2115         int i,is_export;
2116
2117         c=s->cert;
2118         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2119         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2120         if (is_export)
2121                 {
2122                 mask_k = c->export_mask_k;
2123                 mask_a = c->export_mask_a;
2124                 }
2125         else
2126                 {
2127                 mask_k = c->mask_k;
2128                 mask_a = c->mask_a;
2129                 }
2130
2131         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2132         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2133
2134         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2135                 {
2136                 /* we don't need to look at SSL_kEECDH
2137                  * since no certificate is needed for
2138                  * anon ECDH and for authenticated
2139                  * EECDH, the check for the auth
2140                  * algorithm will set i correctly
2141                  * NOTE: For ECDH-RSA, we need an ECC
2142                  * not an RSA cert but for EECDH-RSA
2143                  * we need an RSA cert. Placing the
2144                  * checks for SSL_kECDH before RSA
2145                  * checks ensures the correct cert is chosen.
2146                  */
2147                 i=SSL_PKEY_ECC;
2148                 }
2149         else if (alg_a & SSL_aECDSA)
2150                 {
2151                 i=SSL_PKEY_ECC;
2152                 }
2153         else if (alg_k & SSL_kDHr)
2154                 i=SSL_PKEY_DH_RSA;
2155         else if (alg_k & SSL_kDHd)
2156                 i=SSL_PKEY_DH_DSA;
2157         else if (alg_a & SSL_aDSS)
2158                 i=SSL_PKEY_DSA_SIGN;
2159         else if (alg_a & SSL_aRSA)
2160                 {
2161                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2162                         i=SSL_PKEY_RSA_SIGN;
2163                 else
2164                         i=SSL_PKEY_RSA_ENC;
2165                 }
2166         else if (alg_a & SSL_aKRB5)
2167                 {
2168                 /* VRS something else here? */
2169                 return(NULL);
2170                 }
2171         else if (alg_a & SSL_aGOST94)
2172                 i=SSL_PKEY_GOST94;
2173         else if (alg_a & SSL_aGOST01)
2174                 i=SSL_PKEY_GOST01;
2175         else /* if (alg_a & SSL_aNULL) */
2176                 {
2177                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2178                 return(NULL);
2179                 }
2180         if (c->pkeys[i].x509 == NULL) return(NULL);
2181
2182         return(c->pkeys[i].x509);
2183         }
2184
2185 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2186         {
2187         unsigned long alg_a;
2188         CERT *c;
2189
2190         alg_a = cipher->algorithm_auth;
2191         c=s->cert;
2192
2193         if ((alg_a & SSL_aDSS) &&
2194                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2195                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2196         else if (alg_a & SSL_aRSA)
2197                 {
2198                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2199                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2200                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2201                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2202                 else
2203                         return(NULL);
2204                 }
2205         else if ((alg_a & SSL_aECDSA) &&
2206                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2207                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2208         else /* if (alg_a & SSL_aNULL) */
2209                 {
2210                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2211                 return(NULL);
2212                 }
2213         }
2214
2215 void ssl_update_cache(SSL *s,int mode)
2216         {
2217         int i;
2218
2219         /* If the session_id_length is 0, we are not supposed to cache it,
2220          * and it would be rather hard to do anyway :-) */
2221         if (s->session->session_id_length == 0) return;
2222
2223         i=s->session_ctx->session_cache_mode;
2224         if ((i & mode) && (!s->hit)
2225                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2226                     || SSL_CTX_add_session(s->session_ctx,s->session))
2227                 && (s->session_ctx->new_session_cb != NULL))
2228                 {
2229                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2230                 if (!s->session_ctx->new_session_cb(s,s->session))
2231                         SSL_SESSION_free(s->session);
2232                 }
2233
2234         /* auto flush every 255 connections */
2235         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2236                 ((i & mode) == mode))
2237                 {
2238                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2239                         ?s->session_ctx->stats.sess_connect_good
2240                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2241                         {
2242                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2243                         }
2244                 }
2245         }
2246
2247 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2248         {
2249         return(s->method);
2250         }
2251
2252 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2253         {
2254         int conn= -1;
2255         int ret=1;
2256
2257         if (s->method != meth)
2258                 {
2259                 if (s->handshake_func != NULL)
2260                         conn=(s->handshake_func == s->method->ssl_connect);
2261
2262                 if (s->method->version == meth->version)
2263                         s->method=meth;
2264                 else
2265                         {
2266                         s->method->ssl_free(s);
2267                         s->method=meth;
2268                         ret=s->method->ssl_new(s);
2269                         }
2270
2271                 if (conn == 1)
2272                         s->handshake_func=meth->ssl_connect;
2273                 else if (conn == 0)
2274                         s->handshake_func=meth->ssl_accept;
2275                 }
2276         return(ret);
2277         }
2278
2279 int SSL_get_error(const SSL *s,int i)
2280         {
2281         int reason;
2282         unsigned long l;
2283         BIO *bio;
2284
2285         if (i > 0) return(SSL_ERROR_NONE);
2286
2287         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2288          * etc, where we do encode the error */
2289         if ((l=ERR_peek_error()) != 0)
2290                 {
2291                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2292                         return(SSL_ERROR_SYSCALL);
2293                 else
2294                         return(SSL_ERROR_SSL);
2295                 }
2296
2297         if ((i < 0) && SSL_want_read(s))
2298                 {
2299                 bio=SSL_get_rbio(s);
2300                 if (BIO_should_read(bio))
2301                         return(SSL_ERROR_WANT_READ);
2302                 else if (BIO_should_write(bio))
2303                         /* This one doesn't make too much sense ... We never try
2304                          * to write to the rbio, and an application program where
2305                          * rbio and wbio are separate couldn't even know what it
2306                          * should wait for.
2307                          * However if we ever set s->rwstate incorrectly
2308                          * (so that we have SSL_want_read(s) instead of
2309                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2310                          * this test works around that bug; so it might be safer
2311                          * to keep it. */
2312                         return(SSL_ERROR_WANT_WRITE);
2313                 else if (BIO_should_io_special(bio))
2314                         {
2315                         reason=BIO_get_retry_reason(bio);
2316                         if (reason == BIO_RR_CONNECT)
2317                                 return(SSL_ERROR_WANT_CONNECT);
2318                         else if (reason == BIO_RR_ACCEPT)
2319                                 return(SSL_ERROR_WANT_ACCEPT);
2320                         else
2321                                 return(SSL_ERROR_SYSCALL); /* unknown */
2322                         }
2323                 }
2324
2325         if ((i < 0) && SSL_want_write(s))
2326                 {
2327                 bio=SSL_get_wbio(s);
2328                 if (BIO_should_write(bio))
2329                         return(SSL_ERROR_WANT_WRITE);
2330                 else if (BIO_should_read(bio))
2331                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2332                         return(SSL_ERROR_WANT_READ);
2333                 else if (BIO_should_io_special(bio))
2334                         {
2335                         reason=BIO_get_retry_reason(bio);
2336                         if (reason == BIO_RR_CONNECT)
2337                                 return(SSL_ERROR_WANT_CONNECT);
2338                         else if (reason == BIO_RR_ACCEPT)
2339                                 return(SSL_ERROR_WANT_ACCEPT);
2340                         else
2341                                 return(SSL_ERROR_SYSCALL);
2342                         }
2343                 }
2344         if ((i < 0) && SSL_want_x509_lookup(s))
2345                 {
2346                 return(SSL_ERROR_WANT_X509_LOOKUP);
2347                 }
2348
2349         if (i == 0)
2350                 {
2351                 if (s->version == SSL2_VERSION)
2352                         {
2353                         /* assume it is the socket being closed */
2354                         return(SSL_ERROR_ZERO_RETURN);
2355                         }
2356                 else
2357                         {
2358                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2359                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2360                                 return(SSL_ERROR_ZERO_RETURN);
2361                         }
2362                 }
2363         return(SSL_ERROR_SYSCALL);
2364         }
2365
2366 int SSL_do_handshake(SSL *s)
2367         {
2368         int ret=1;
2369
2370         if (s->handshake_func == NULL)
2371                 {
2372                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2373                 return(-1);
2374                 }
2375
2376         s->method->ssl_renegotiate_check(s);
2377
2378         if (SSL_in_init(s) || SSL_in_before(s))
2379                 {
2380                 ret=s->handshake_func(s);
2381                 }
2382         return(ret);
2383         }
2384
2385 /* For the next 2 functions, SSL_clear() sets shutdown and so
2386  * one of these calls will reset it */
2387 void SSL_set_accept_state(SSL *s)
2388         {
2389         s->server=1;
2390         s->shutdown=0;
2391         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2392         s->handshake_func=s->method->ssl_accept;
2393         /* clear the current cipher */
2394         ssl_clear_cipher_ctx(s);
2395         ssl_clear_hash_ctx(&s->read_hash);
2396         ssl_clear_hash_ctx(&s->write_hash);
2397         }
2398
2399 void SSL_set_connect_state(SSL *s)
2400         {
2401         s->server=0;
2402         s->shutdown=0;
2403         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2404         s->handshake_func=s->method->ssl_connect;
2405         /* clear the current cipher */
2406         ssl_clear_cipher_ctx(s);
2407         ssl_clear_hash_ctx(&s->read_hash);
2408         ssl_clear_hash_ctx(&s->write_hash);
2409         }
2410
2411 int ssl_undefined_function(SSL *s)
2412         {
2413         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2414         return(0);
2415         }
2416
2417 int ssl_undefined_void_function(void)
2418         {
2419         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2420         return(0);
2421         }
2422
2423 int ssl_undefined_const_function(const SSL *s)
2424         {
2425         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2426         return(0);
2427         }
2428
2429 SSL_METHOD *ssl_bad_method(int ver)
2430         {
2431         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2432         return(NULL);
2433         }
2434
2435 const char *SSL_get_version(const SSL *s)
2436         {
2437         if (s->version == TLS1_1_VERSION)
2438                 return("TLSv1.1");
2439         else if (s->version == SSL3_VERSION)
2440                 return("SSLv3");
2441         else if (s->version == SSL3_VERSION)
2442                 return("SSLv3");
2443         else if (s->version == SSL2_VERSION)
2444                 return("SSLv2");
2445         else
2446                 return("unknown");
2447         }
2448
2449 SSL *SSL_dup(SSL *s)
2450         {
2451         STACK_OF(X509_NAME) *sk;
2452         X509_NAME *xn;
2453         SSL *ret;
2454         int i;
2455
2456         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2457             return(NULL);
2458
2459         ret->version = s->version;
2460         ret->type = s->type;
2461         ret->method = s->method;
2462
2463         if (s->session != NULL)
2464                 {
2465                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2466                 SSL_copy_session_id(ret,s);
2467                 }
2468         else
2469                 {
2470                 /* No session has been established yet, so we have to expect
2471                  * that s->cert or ret->cert will be changed later --
2472                  * they should not both point to the same object,
2473                  * and thus we can't use SSL_copy_session_id. */
2474
2475                 ret->method->ssl_free(ret);
2476                 ret->method = s->method;
2477                 ret->method->ssl_new(ret);
2478
2479                 if (s->cert != NULL)
2480                         {
2481                         if (ret->cert != NULL)
2482                                 {
2483                                 ssl_cert_free(ret->cert);
2484                                 }
2485                         ret->cert = ssl_cert_dup(s->cert);
2486                         if (ret->cert == NULL)
2487                                 goto err;
2488                         }
2489
2490                 SSL_set_session_id_context(ret,
2491                         s->sid_ctx, s->sid_ctx_length);
2492                 }
2493
2494         ret->options=s->options;
2495         ret->mode=s->mode;
2496         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2497         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2498         ret->msg_callback = s->msg_callback;
2499         ret->msg_callback_arg = s->msg_callback_arg;
2500         SSL_set_verify(ret,SSL_get_verify_mode(s),
2501                 SSL_get_verify_callback(s));
2502         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2503         ret->generate_session_id = s->generate_session_id;
2504
2505         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2506
2507         ret->debug=s->debug;
2508
2509         /* copy app data, a little dangerous perhaps */
2510         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2511                 goto err;
2512
2513         /* setup rbio, and wbio */
2514         if (s->rbio != NULL)
2515                 {
2516                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2517                         goto err;
2518                 }
2519         if (s->wbio != NULL)
2520                 {
2521                 if (s->wbio != s->rbio)
2522                         {
2523                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2524                                 goto err;
2525                         }
2526                 else
2527                         ret->wbio=ret->rbio;
2528                 }
2529         ret->rwstate = s->rwstate;
2530         ret->in_handshake = s->in_handshake;
2531         ret->handshake_func = s->handshake_func;
2532         ret->server = s->server;
2533         ret->new_session = s->new_session;
2534         ret->quiet_shutdown = s->quiet_shutdown;
2535         ret->shutdown=s->shutdown;
2536         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2537         ret->rstate=s->rstate;
2538         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2539         ret->hit=s->hit;
2540
2541         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2542
2543         /* dup the cipher_list and cipher_list_by_id stacks */
2544         if (s->cipher_list != NULL)
2545                 {
2546                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2547                         goto err;
2548                 }
2549         if (s->cipher_list_by_id != NULL)
2550                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2551                         == NULL)
2552                         goto err;
2553
2554         /* Dup the client_CA list */
2555         if (s->client_CA != NULL)
2556                 {
2557                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2558                 ret->client_CA=sk;
2559                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2560                         {
2561                         xn=sk_X509_NAME_value(sk,i);
2562                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2563                                 {
2564                                 X509_NAME_free(xn);
2565                                 goto err;
2566                                 }
2567                         }
2568                 }
2569
2570         if (0)
2571                 {
2572 err:
2573                 if (ret != NULL) SSL_free(ret);
2574                 ret=NULL;
2575                 }
2576         return(ret);
2577         }
2578
2579 void ssl_clear_cipher_ctx(SSL *s)
2580         {
2581         if (s->enc_read_ctx != NULL)
2582                 {
2583                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2584                 OPENSSL_free(s->enc_read_ctx);
2585                 s->enc_read_ctx=NULL;
2586                 }
2587         if (s->enc_write_ctx != NULL)
2588                 {
2589                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2590                 OPENSSL_free(s->enc_write_ctx);
2591                 s->enc_write_ctx=NULL;
2592                 }
2593 #ifndef OPENSSL_NO_COMP
2594         if (s->expand != NULL)
2595                 {
2596                 COMP_CTX_free(s->expand);
2597                 s->expand=NULL;
2598                 }
2599         if (s->compress != NULL)
2600                 {
2601                 COMP_CTX_free(s->compress);
2602                 s->compress=NULL;
2603                 }
2604 #endif
2605         }
2606
2607 /* Fix this function so that it takes an optional type parameter */
2608 X509 *SSL_get_certificate(const SSL *s)
2609         {
2610         if (s->cert != NULL)
2611                 return(s->cert->key->x509);
2612         else
2613                 return(NULL);
2614         }
2615
2616 /* Fix this function so that it takes an optional type parameter */
2617 EVP_PKEY *SSL_get_privatekey(SSL *s)
2618         {
2619         if (s->cert != NULL)
2620                 return(s->cert->key->privatekey);
2621         else
2622                 return(NULL);
2623         }
2624
2625 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2626         {
2627         if ((s->session != NULL) && (s->session->cipher != NULL))
2628                 return(s->session->cipher);
2629         return(NULL);
2630         }
2631 #ifdef OPENSSL_NO_COMP
2632 const void *SSL_get_current_compression(SSL *s)
2633         {
2634         return NULL;
2635         }
2636 const void *SSL_get_current_expansion(SSL *s)
2637         {
2638         return NULL;
2639         }
2640 #else
2641
2642 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2643         {
2644         if (s->compress != NULL)
2645                 return(s->compress->meth);
2646         return(NULL);
2647         }
2648
2649 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2650         {
2651         if (s->expand != NULL)
2652                 return(s->expand->meth);
2653         return(NULL);
2654         }
2655 #endif
2656
2657 int ssl_init_wbio_buffer(SSL *s,int push)
2658         {
2659         BIO *bbio;
2660
2661         if (s->bbio == NULL)
2662                 {
2663                 bbio=BIO_new(BIO_f_buffer());
2664                 if (bbio == NULL) return(0);
2665                 s->bbio=bbio;
2666                 }
2667         else
2668                 {
2669                 bbio=s->bbio;
2670                 if (s->bbio == s->wbio)
2671                         s->wbio=BIO_pop(s->wbio);
2672                 }
2673         (void)BIO_reset(bbio);
2674 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2675         if (!BIO_set_read_buffer_size(bbio,1))
2676                 {
2677                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2678                 return(0);
2679                 }
2680         if (push)
2681                 {
2682                 if (s->wbio != bbio)
2683                         s->wbio=BIO_push(bbio,s->wbio);
2684                 }
2685         else
2686                 {
2687                 if (s->wbio == bbio)
2688                         s->wbio=BIO_pop(bbio);
2689                 }
2690         return(1);
2691         }
2692
2693 void ssl_free_wbio_buffer(SSL *s)
2694         {
2695         if (s->bbio == NULL) return;
2696
2697         if (s->bbio == s->wbio)
2698                 {
2699                 /* remove buffering */
2700                 s->wbio=BIO_pop(s->wbio);
2701 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2702                 assert(s->wbio != NULL);
2703 #endif
2704         }
2705         BIO_free(s->bbio);
2706         s->bbio=NULL;
2707         }
2708
2709 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2710         {
2711         ctx->quiet_shutdown=mode;
2712         }
2713
2714 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2715         {
2716         return(ctx->quiet_shutdown);
2717         }
2718
2719 void SSL_set_quiet_shutdown(SSL *s,int mode)
2720         {
2721         s->quiet_shutdown=mode;
2722         }
2723
2724 int SSL_get_quiet_shutdown(const SSL *s)
2725         {
2726         return(s->quiet_shutdown);
2727         }
2728
2729 void SSL_set_shutdown(SSL *s,int mode)
2730         {
2731         s->shutdown=mode;
2732         }
2733
2734 int SSL_get_shutdown(const SSL *s)
2735         {
2736         return(s->shutdown);
2737         }
2738
2739 int SSL_version(const SSL *s)
2740         {
2741         return(s->version);
2742         }
2743
2744 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2745         {
2746         return(ssl->ctx);
2747         }
2748
2749 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2750         {
2751         if (ssl->ctx == ctx)
2752                 return ssl->ctx;
2753 #ifndef OPENSSL_NO_TLSEXT
2754         if (ctx == NULL)
2755                 ctx = ssl->initial_ctx;
2756 #endif
2757         if (ssl->cert != NULL)
2758                 ssl_cert_free(ssl->cert);
2759         ssl->cert = ssl_cert_dup(ctx->cert);
2760         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2761         if (ssl->ctx != NULL)
2762                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2763         ssl->ctx = ctx;
2764         return(ssl->ctx);
2765         }
2766
2767 #ifndef OPENSSL_NO_STDIO
2768 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2769         {
2770         return(X509_STORE_set_default_paths(ctx->cert_store));
2771         }
2772
2773 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2774                 const char *CApath)
2775         {
2776         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2777         }
2778 #endif
2779
2780 void SSL_set_info_callback(SSL *ssl,
2781         void (*cb)(const SSL *ssl,int type,int val))
2782         {
2783         ssl->info_callback=cb;
2784         }
2785
2786 /* One compiler (Diab DCC) doesn't like argument names in returned
2787    function pointer.  */
2788 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2789         {
2790         return ssl->info_callback;
2791         }
2792
2793 int SSL_state(const SSL *ssl)
2794         {
2795         return(ssl->state);
2796         }
2797
2798 void SSL_set_verify_result(SSL *ssl,long arg)
2799         {
2800         ssl->verify_result=arg;
2801         }
2802
2803 long SSL_get_verify_result(const SSL *ssl)
2804         {
2805         return(ssl->verify_result);
2806         }
2807
2808 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2809                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2810         {
2811         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2812                                 new_func, dup_func, free_func);
2813         }
2814
2815 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2816         {
2817         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2818         }
2819
2820 void *SSL_get_ex_data(const SSL *s,int idx)
2821         {
2822         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2823         }
2824
2825 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2826                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2827         {
2828         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2829                                 new_func, dup_func, free_func);
2830         }
2831
2832 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2833         {
2834         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2835         }
2836
2837 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2838         {
2839         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2840         }
2841
2842 int ssl_ok(SSL *s)
2843         {
2844         return(1);
2845         }
2846
2847 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2848         {
2849         return(ctx->cert_store);
2850         }
2851
2852 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2853         {
2854         if (ctx->cert_store != NULL)
2855                 X509_STORE_free(ctx->cert_store);
2856         ctx->cert_store=store;
2857         }
2858
2859 int SSL_want(const SSL *s)
2860         {
2861         return(s->rwstate);
2862         }
2863
2864 /*!
2865  * \brief Set the callback for generating temporary RSA keys.
2866  * \param ctx the SSL context.
2867  * \param cb the callback
2868  */
2869
2870 #ifndef OPENSSL_NO_RSA
2871 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2872                                                           int is_export,
2873                                                           int keylength))
2874     {
2875     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2876     }
2877
2878 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2879                                                   int is_export,
2880                                                   int keylength))
2881     {
2882     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2883     }
2884 #endif
2885
2886 #ifdef DOXYGEN
2887 /*!
2888  * \brief The RSA temporary key callback function.
2889  * \param ssl the SSL session.
2890  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2891  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2892  * of the required key in bits.
2893  * \return the temporary RSA key.
2894  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2895  */
2896
2897 RSA *cb(SSL *ssl,int is_export,int keylength)
2898     {}
2899 #endif
2900
2901 /*!
2902  * \brief Set the callback for generating temporary DH keys.
2903  * \param ctx the SSL context.
2904  * \param dh the callback
2905  */
2906
2907 #ifndef OPENSSL_NO_DH
2908 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2909                                                         int keylength))
2910         {
2911         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2912         }
2913
2914 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2915                                                 int keylength))
2916         {
2917         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2918         }
2919 #endif
2920
2921 #ifndef OPENSSL_NO_ECDH
2922 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2923                                                                 int keylength))
2924         {
2925         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2926         }
2927
2928 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2929                                                         int keylength))
2930         {
2931         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2932         }
2933 #endif
2934
2935 #ifndef OPENSSL_NO_PSK
2936 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2937         {
2938         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2939                 {
2940                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2941                 return 0;
2942                 }
2943         if (ctx->psk_identity_hint != NULL)
2944                 OPENSSL_free(ctx->psk_identity_hint);
2945         if (identity_hint != NULL)
2946                 {
2947                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2948                 if (ctx->psk_identity_hint == NULL)
2949                         return 0;
2950                 }
2951         else
2952                 ctx->psk_identity_hint = NULL;
2953         return 1;
2954         }
2955
2956 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2957         {
2958         if (s == NULL)
2959                 return 0;
2960
2961         if (s->session == NULL)
2962                 return 1; /* session not created yet, ignored */
2963
2964         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2965                 {
2966                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2967                 return 0;
2968                 }
2969         if (s->session->psk_identity_hint != NULL)
2970                 OPENSSL_free(s->session->psk_identity_hint);
2971         if (identity_hint != NULL)
2972                 {
2973                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2974                 if (s->session->psk_identity_hint == NULL)
2975                         return 0;
2976                 }
2977         else
2978                 s->session->psk_identity_hint = NULL;
2979         return 1;
2980         }
2981
2982 const char *SSL_get_psk_identity_hint(const SSL *s)
2983         {
2984         if (s == NULL || s->session == NULL)
2985                 return NULL;
2986         return(s->session->psk_identity_hint);
2987         }
2988
2989 const char *SSL_get_psk_identity(const SSL *s)
2990         {
2991         if (s == NULL || s->session == NULL)
2992                 return NULL;
2993         return(s->session->psk_identity);
2994         }
2995
2996 void SSL_set_psk_client_callback(SSL *s,
2997     unsigned int (*cb)(SSL *ssl, const char *hint,
2998                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2999                        unsigned int max_psk_len))
3000         {
3001         s->psk_client_callback = cb;
3002         }
3003
3004 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3005     unsigned int (*cb)(SSL *ssl, const char *hint,
3006                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3007                        unsigned int max_psk_len))
3008         {
3009         ctx->psk_client_callback = cb;
3010         }
3011
3012 void SSL_set_psk_server_callback(SSL *s,
3013     unsigned int (*cb)(SSL *ssl, const char *identity,
3014                        unsigned char *psk, unsigned int max_psk_len))
3015         {
3016         s->psk_server_callback = cb;
3017         }
3018
3019 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3020     unsigned int (*cb)(SSL *ssl, const char *identity,
3021                        unsigned char *psk, unsigned int max_psk_len))
3022         {
3023         ctx->psk_server_callback = cb;
3024         }
3025 #endif
3026
3027 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))
3028         {
3029         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3030         }
3031 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))
3032         {
3033         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3034         }
3035
3036 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3037  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3038  * any. If EVP_MD pointer is passed, initializes ctx with this md
3039  * Returns newly allocated ctx;
3040  */
3041
3042 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3043 {
3044         ssl_clear_hash_ctx(hash);
3045         *hash = EVP_MD_CTX_create();
3046         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3047         return *hash;
3048 }
3049 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3050 {
3051
3052         if (*hash) EVP_MD_CTX_destroy(*hash);
3053         *hash=NULL;
3054 }
3055
3056 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3057 #include "../crypto/bio/bss_file.c"
3058 #endif
3059
3060 IMPLEMENT_STACK_OF(SSL_CIPHER)
3061 IMPLEMENT_STACK_OF(SSL_COMP)
3062 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3063                                     ssl_cipher_id);
3064