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 no extensions (i.e. SSL3 is client_version)
1374          * since spec RECOMMENDS not sending both RI and SCSV.
1375          */
1376         if (p != q && !s->new_session && s->client_version == SSL3_VERSION)
1377                 {
1378                 static SSL_CIPHER scsv =
1379                         {
1380                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1381                         };
1382                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1383                 p+=j;
1384 #ifdef OPENSSL_RI_DEBUG
1385                 fprintf(stderr, "SCSV sent by client\n");
1386 #endif
1387                 }
1388
1389         return(p-q);
1390         }
1391
1392 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1393                                                STACK_OF(SSL_CIPHER) **skp)
1394         {
1395         const SSL_CIPHER *c;
1396         STACK_OF(SSL_CIPHER) *sk;
1397         int i,n;
1398         if (s->s3)
1399                 s->s3->send_connection_binding = 0;
1400
1401         n=ssl_put_cipher_by_char(s,NULL,NULL);
1402         if ((num%n) != 0)
1403                 {
1404                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1405                 return(NULL);
1406                 }
1407         if ((skp == NULL) || (*skp == NULL))
1408                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1409         else
1410                 {
1411                 sk= *skp;
1412                 sk_SSL_CIPHER_zero(sk);
1413                 }
1414
1415         for (i=0; i<num; i+=n)
1416                 {
1417                 /* Check for SCSV */
1418                 if (s->s3 && (n != 3 || !p[0]) &&
1419                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1420                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1421                         {
1422                         /* SCSV fatal if renegotiating */
1423                         if (s->new_session)
1424                                 {
1425                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1426                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1427                                 goto err;
1428                                 }
1429                         s->s3->send_connection_binding = 1;
1430                         p += n;
1431 #ifdef OPENSSL_RI_DEBUG
1432                         fprintf(stderr, "SCSV received by server\n");
1433 #endif
1434                         continue;
1435                         }
1436
1437                 c=ssl_get_cipher_by_char(s,p);
1438                 p+=n;
1439                 if (c != NULL)
1440                         {
1441                         if (!sk_SSL_CIPHER_push(sk,c))
1442                                 {
1443                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1444                                 goto err;
1445                                 }
1446                         }
1447                 }
1448
1449         if (skp != NULL)
1450                 *skp=sk;
1451         return(sk);
1452 err:
1453         if ((skp == NULL) || (*skp == NULL))
1454                 sk_SSL_CIPHER_free(sk);
1455         return(NULL);
1456         }
1457
1458
1459 #ifndef OPENSSL_NO_TLSEXT
1460 /** return a servername extension value if provided in Client Hello, or NULL.
1461  * So far, only host_name types are defined (RFC 3546).
1462  */
1463
1464 const char *SSL_get_servername(const SSL *s, const int type)
1465         {
1466         if (type != TLSEXT_NAMETYPE_host_name)
1467                 return NULL;
1468
1469         return s->session && !s->tlsext_hostname ?
1470                 s->session->tlsext_hostname :
1471                 s->tlsext_hostname;
1472         }
1473
1474 int SSL_get_servername_type(const SSL *s)
1475         {
1476         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1477                 return TLSEXT_NAMETYPE_host_name;
1478         return -1;
1479         }
1480 #endif
1481
1482 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1483         {
1484         unsigned long l;
1485
1486         l=(unsigned long)
1487                 ((unsigned int) a->session_id[0]     )|
1488                 ((unsigned int) a->session_id[1]<< 8L)|
1489                 ((unsigned long)a->session_id[2]<<16L)|
1490                 ((unsigned long)a->session_id[3]<<24L);
1491         return(l);
1492         }
1493
1494 /* NB: If this function (or indeed the hash function which uses a sort of
1495  * coarser function than this one) is changed, ensure
1496  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1497  * able to construct an SSL_SESSION that will collide with any existing session
1498  * with a matching session ID. */
1499 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1500         {
1501         if (a->ssl_version != b->ssl_version)
1502                 return(1);
1503         if (a->session_id_length != b->session_id_length)
1504                 return(1);
1505         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1506         }
1507
1508 /* These wrapper functions should remain rather than redeclaring
1509  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1510  * variable. The reason is that the functions aren't static, they're exposed via
1511  * ssl.h. */
1512 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1513 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1514
1515 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1516         {
1517         SSL_CTX *ret=NULL;
1518
1519         if (meth == NULL)
1520                 {
1521                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1522                 return(NULL);
1523                 }
1524
1525         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1526                 {
1527                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1528                 goto err;
1529                 }
1530         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1531         if (ret == NULL)
1532                 goto err;
1533
1534         memset(ret,0,sizeof(SSL_CTX));
1535
1536         ret->method=meth;
1537
1538         ret->cert_store=NULL;
1539         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1540         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1541         ret->session_cache_head=NULL;
1542         ret->session_cache_tail=NULL;
1543
1544         /* We take the system default */
1545         ret->session_timeout=meth->get_timeout();
1546
1547         ret->new_session_cb=0;
1548         ret->remove_session_cb=0;
1549         ret->get_session_cb=0;
1550         ret->generate_session_id=0;
1551
1552         memset((char *)&ret->stats,0,sizeof(ret->stats));
1553
1554         ret->references=1;
1555         ret->quiet_shutdown=0;
1556
1557 /*      ret->cipher=NULL;*/
1558 /*      ret->s2->challenge=NULL;
1559         ret->master_key=NULL;
1560         ret->key_arg=NULL;
1561         ret->s2->conn_id=NULL; */
1562
1563         ret->info_callback=NULL;
1564
1565         ret->app_verify_callback=0;
1566         ret->app_verify_arg=NULL;
1567
1568         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1569         ret->read_ahead=0;
1570         ret->msg_callback=0;
1571         ret->msg_callback_arg=NULL;
1572         ret->verify_mode=SSL_VERIFY_NONE;
1573 #if 0
1574         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1575 #endif
1576         ret->sid_ctx_length=0;
1577         ret->default_verify_callback=NULL;
1578         if ((ret->cert=ssl_cert_new()) == NULL)
1579                 goto err;
1580
1581         ret->default_passwd_callback=0;
1582         ret->default_passwd_callback_userdata=NULL;
1583         ret->client_cert_cb=0;
1584         ret->app_gen_cookie_cb=0;
1585         ret->app_verify_cookie_cb=0;
1586
1587         ret->sessions=lh_SSL_SESSION_new();
1588         if (ret->sessions == NULL) goto err;
1589         ret->cert_store=X509_STORE_new();
1590         if (ret->cert_store == NULL) goto err;
1591
1592         ssl_create_cipher_list(ret->method,
1593                 &ret->cipher_list,&ret->cipher_list_by_id,
1594                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1595         if (ret->cipher_list == NULL
1596             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1597                 {
1598                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1599                 goto err2;
1600                 }
1601
1602         ret->param = X509_VERIFY_PARAM_new();
1603         if (!ret->param)
1604                 goto err;
1605
1606         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1607                 {
1608                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1609                 goto err2;
1610                 }
1611         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1612                 {
1613                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1614                 goto err2;
1615                 }
1616         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1617                 {
1618                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1619                 goto err2;
1620                 }
1621
1622         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1623                 goto err;
1624
1625         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1626
1627         ret->extra_certs=NULL;
1628         ret->comp_methods=SSL_COMP_get_compression_methods();
1629
1630         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1631
1632 #ifndef OPENSSL_NO_TLSEXT
1633         ret->tlsext_servername_callback = 0;
1634         ret->tlsext_servername_arg = NULL;
1635         /* Setup RFC4507 ticket keys */
1636         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1637                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1638                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1639                 ret->options |= SSL_OP_NO_TICKET;
1640
1641         ret->tlsext_status_cb = 0;
1642         ret->tlsext_status_arg = NULL;
1643
1644 #endif
1645 #ifndef OPENSSL_NO_PSK
1646         ret->psk_identity_hint=NULL;
1647         ret->psk_client_callback=NULL;
1648         ret->psk_server_callback=NULL;
1649 #endif
1650 #ifndef OPENSSL_NO_BUF_FREELISTS
1651         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1652         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1653         if (!ret->rbuf_freelist)
1654                 goto err;
1655         ret->rbuf_freelist->chunklen = 0;
1656         ret->rbuf_freelist->len = 0;
1657         ret->rbuf_freelist->head = NULL;
1658         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1659         if (!ret->wbuf_freelist)
1660                 {
1661                 OPENSSL_free(ret->rbuf_freelist);
1662                 goto err;
1663                 }
1664         ret->wbuf_freelist->chunklen = 0;
1665         ret->wbuf_freelist->len = 0;
1666         ret->wbuf_freelist->head = NULL;
1667 #endif
1668 #ifndef OPENSSL_NO_ENGINE
1669         ret->client_cert_engine = NULL;
1670 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1671 #define eng_strx(x)     #x
1672 #define eng_str(x)      eng_strx(x)
1673         /* Use specific client engine automatically... ignore errors */
1674         {
1675         ENGINE *eng;
1676         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1677         if (!eng)
1678                 {
1679                 ERR_clear_error();
1680                 ENGINE_load_builtin_engines();
1681                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1682                 }
1683         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1684                 ERR_clear_error();
1685         }
1686 #endif
1687 #endif
1688         /* Default is to connect to non-RI servers. When RI is more widely
1689          * deployed might change this.
1690          */
1691         ret->options = SSL_OP_LEGACY_SERVER_CONNECT;
1692
1693         return(ret);
1694 err:
1695         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1696 err2:
1697         if (ret != NULL) SSL_CTX_free(ret);
1698         return(NULL);
1699         }
1700
1701 #if 0
1702 static void SSL_COMP_free(SSL_COMP *comp)
1703     { OPENSSL_free(comp); }
1704 #endif
1705
1706 #ifndef OPENSSL_NO_BUF_FREELISTS
1707 static void
1708 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1709         {
1710         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1711         for (ent = list->head; ent; ent = next)
1712                 {
1713                 next = ent->next;
1714                 OPENSSL_free(ent);
1715                 }
1716         OPENSSL_free(list);
1717         }
1718 #endif
1719
1720 void SSL_CTX_free(SSL_CTX *a)
1721         {
1722         int i;
1723
1724         if (a == NULL) return;
1725
1726         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1727 #ifdef REF_PRINT
1728         REF_PRINT("SSL_CTX",a);
1729 #endif
1730         if (i > 0) return;
1731 #ifdef REF_CHECK
1732         if (i < 0)
1733                 {
1734                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1735                 abort(); /* ok */
1736                 }
1737 #endif
1738
1739         if (a->param)
1740                 X509_VERIFY_PARAM_free(a->param);
1741
1742         /*
1743          * Free internal session cache. However: the remove_cb() may reference
1744          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1745          * after the sessions were flushed.
1746          * As the ex_data handling routines might also touch the session cache,
1747          * the most secure solution seems to be: empty (flush) the cache, then
1748          * free ex_data, then finally free the cache.
1749          * (See ticket [openssl.org #212].)
1750          */
1751         if (a->sessions != NULL)
1752                 SSL_CTX_flush_sessions(a,0);
1753
1754         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1755
1756         if (a->sessions != NULL)
1757                 lh_SSL_SESSION_free(a->sessions);
1758
1759         if (a->cert_store != NULL)
1760                 X509_STORE_free(a->cert_store);
1761         if (a->cipher_list != NULL)
1762                 sk_SSL_CIPHER_free(a->cipher_list);
1763         if (a->cipher_list_by_id != NULL)
1764                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1765         if (a->cert != NULL)
1766                 ssl_cert_free(a->cert);
1767         if (a->client_CA != NULL)
1768                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1769         if (a->extra_certs != NULL)
1770                 sk_X509_pop_free(a->extra_certs,X509_free);
1771 #if 0 /* This should never be done, since it removes a global database */
1772         if (a->comp_methods != NULL)
1773                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1774 #else
1775         a->comp_methods = NULL;
1776 #endif
1777
1778 #ifndef OPENSSL_NO_PSK
1779         if (a->psk_identity_hint)
1780                 OPENSSL_free(a->psk_identity_hint);
1781 #endif
1782 #ifndef OPENSSL_NO_ENGINE
1783         if (a->client_cert_engine)
1784                 ENGINE_finish(a->client_cert_engine);
1785 #endif
1786
1787 #ifndef OPENSSL_NO_BUF_FREELISTS
1788         if (a->wbuf_freelist)
1789                 ssl_buf_freelist_free(a->wbuf_freelist);
1790         if (a->rbuf_freelist)
1791                 ssl_buf_freelist_free(a->rbuf_freelist);
1792 #endif
1793
1794         OPENSSL_free(a);
1795         }
1796
1797 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1798         {
1799         ctx->default_passwd_callback=cb;
1800         }
1801
1802 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1803         {
1804         ctx->default_passwd_callback_userdata=u;
1805         }
1806
1807 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1808         {
1809         ctx->app_verify_callback=cb;
1810         ctx->app_verify_arg=arg;
1811         }
1812
1813 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1814         {
1815         ctx->verify_mode=mode;
1816         ctx->default_verify_callback=cb;
1817         }
1818
1819 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1820         {
1821         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1822         }
1823
1824 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1825         {
1826         CERT_PKEY *cpk;
1827         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1828         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1829         int rsa_tmp_export,dh_tmp_export,kl;
1830         unsigned long mask_k,mask_a,emask_k,emask_a;
1831         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1832 #ifndef OPENSSL_NO_ECDH
1833         int have_ecdh_tmp;
1834 #endif
1835         X509 *x = NULL;
1836         EVP_PKEY *ecc_pkey = NULL;
1837         int signature_nid = 0;
1838
1839         if (c == NULL) return;
1840
1841         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1842
1843 #ifndef OPENSSL_NO_RSA
1844         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1845         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1846                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1847 #else
1848         rsa_tmp=rsa_tmp_export=0;
1849 #endif
1850 #ifndef OPENSSL_NO_DH
1851         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1852         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1853                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1854 #else
1855         dh_tmp=dh_tmp_export=0;
1856 #endif
1857
1858 #ifndef OPENSSL_NO_ECDH
1859         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1860 #endif
1861         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1862         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1863         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1864         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1865         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1866         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1867         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1868         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1869         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1870         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1871         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1872 /* FIX THIS EAY EAY EAY */
1873         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1874         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1875         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1876         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1877         mask_k=0;
1878         mask_a=0;
1879         emask_k=0;
1880         emask_a=0;
1881
1882
1883
1884 #ifdef CIPHER_DEBUG
1885         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1886                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1887                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1888 #endif
1889
1890         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1891         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1892                 mask_k |= SSL_kGOST;
1893                 mask_a |= SSL_aGOST01;
1894         }
1895         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1896         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1897                 mask_k |= SSL_kGOST;
1898                 mask_a |= SSL_aGOST94;
1899         }
1900
1901         if (rsa_enc || (rsa_tmp && rsa_sign))
1902                 mask_k|=SSL_kRSA;
1903         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1904                 emask_k|=SSL_kRSA;
1905
1906 #if 0
1907         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1908         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1909                 (rsa_enc || rsa_sign || dsa_sign))
1910                 mask_k|=SSL_kEDH;
1911         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1912                 (rsa_enc || rsa_sign || dsa_sign))
1913                 emask_k|=SSL_kEDH;
1914 #endif
1915
1916         if (dh_tmp_export)
1917                 emask_k|=SSL_kEDH;
1918
1919         if (dh_tmp)
1920                 mask_k|=SSL_kEDH;
1921
1922         if (dh_rsa) mask_k|=SSL_kDHr;
1923         if (dh_rsa_export) emask_k|=SSL_kDHr;
1924
1925         if (dh_dsa) mask_k|=SSL_kDHd;
1926         if (dh_dsa_export) emask_k|=SSL_kDHd;
1927
1928         if (rsa_enc || rsa_sign)
1929                 {
1930                 mask_a|=SSL_aRSA;
1931                 emask_a|=SSL_aRSA;
1932                 }
1933
1934         if (dsa_sign)
1935                 {
1936                 mask_a|=SSL_aDSS;
1937                 emask_a|=SSL_aDSS;
1938                 }
1939
1940         mask_a|=SSL_aNULL;
1941         emask_a|=SSL_aNULL;
1942
1943 #ifndef OPENSSL_NO_KRB5
1944         mask_k|=SSL_kKRB5;
1945         mask_a|=SSL_aKRB5;
1946         emask_k|=SSL_kKRB5;
1947         emask_a|=SSL_aKRB5;
1948 #endif
1949
1950         /* An ECC certificate may be usable for ECDH and/or
1951          * ECDSA cipher suites depending on the key usage extension.
1952          */
1953         if (have_ecc_cert)
1954                 {
1955                 /* This call populates extension flags (ex_flags) */
1956                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1957                 X509_check_purpose(x, -1, 0);
1958                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1959                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1960                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1961                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1962                 ecc_pkey = X509_get_pubkey(x);
1963                 ecc_pkey_size = (ecc_pkey != NULL) ?
1964                     EVP_PKEY_bits(ecc_pkey) : 0;
1965                 EVP_PKEY_free(ecc_pkey);
1966                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1967                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1968 #ifndef OPENSSL_NO_ECDH
1969                 if (ecdh_ok)
1970                         {
1971                         const char *sig = OBJ_nid2ln(signature_nid);
1972                         if (sig == NULL)
1973                                 {
1974                                 ERR_clear_error();
1975                                 sig = "unknown";
1976                                 }
1977
1978                         if (strstr(sig, "WithRSA"))
1979                                 {
1980                                 mask_k|=SSL_kECDHr;
1981                                 mask_a|=SSL_aECDH;
1982                                 if (ecc_pkey_size <= 163)
1983                                         {
1984                                         emask_k|=SSL_kECDHr;
1985                                         emask_a|=SSL_aECDH;
1986                                         }
1987                                 }
1988
1989                         if (signature_nid == NID_ecdsa_with_SHA1)
1990                                 {
1991                                 mask_k|=SSL_kECDHe;
1992                                 mask_a|=SSL_aECDH;
1993                                 if (ecc_pkey_size <= 163)
1994                                         {
1995                                         emask_k|=SSL_kECDHe;
1996                                         emask_a|=SSL_aECDH;
1997                                         }
1998                                 }
1999                         }
2000 #endif
2001 #ifndef OPENSSL_NO_ECDSA
2002                 if (ecdsa_ok)
2003                         {
2004                         mask_a|=SSL_aECDSA;
2005                         emask_a|=SSL_aECDSA;
2006                         }
2007 #endif
2008                 }
2009
2010 #ifndef OPENSSL_NO_ECDH
2011         if (have_ecdh_tmp)
2012                 {
2013                 mask_k|=SSL_kEECDH;
2014                 emask_k|=SSL_kEECDH;
2015                 }
2016 #endif
2017
2018 #ifndef OPENSSL_NO_PSK
2019         mask_k |= SSL_kPSK;
2020         mask_a |= SSL_aPSK;
2021         emask_k |= SSL_kPSK;
2022         emask_a |= SSL_aPSK;
2023 #endif
2024
2025         c->mask_k=mask_k;
2026         c->mask_a=mask_a;
2027         c->export_mask_k=emask_k;
2028         c->export_mask_a=emask_a;
2029         c->valid=1;
2030         }
2031
2032 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2033 #define ku_reject(x, usage) \
2034         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2035
2036 #ifndef OPENSSL_NO_EC
2037
2038 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
2039         {
2040         unsigned long alg_k, alg_a;
2041         EVP_PKEY *pkey = NULL;
2042         int keysize = 0;
2043         int signature_nid = 0;
2044
2045         alg_k = cs->algorithm_mkey;
2046         alg_a = cs->algorithm_auth;
2047
2048         if (SSL_C_IS_EXPORT(cs))
2049                 {
2050                 /* ECDH key length in export ciphers must be <= 163 bits */
2051                 pkey = X509_get_pubkey(x);
2052                 if (pkey == NULL) return 0;
2053                 keysize = EVP_PKEY_bits(pkey);
2054                 EVP_PKEY_free(pkey);
2055                 if (keysize > 163) return 0;
2056                 }
2057
2058         /* This call populates the ex_flags field correctly */
2059         X509_check_purpose(x, -1, 0);
2060         if ((x->sig_alg) && (x->sig_alg->algorithm))
2061                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2062         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2063                 {
2064                 /* key usage, if present, must allow key agreement */
2065                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2066                         {
2067                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2068                         return 0;
2069                         }
2070                 if (alg_k & SSL_kECDHe)
2071                         {
2072                         /* signature alg must be ECDSA */
2073                         if (signature_nid != NID_ecdsa_with_SHA1)
2074                                 {
2075                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2076                                 return 0;
2077                                 }
2078                         }
2079                 if (alg_k & SSL_kECDHr)
2080                         {
2081                         /* signature alg must be RSA */
2082
2083                         const char *sig = OBJ_nid2ln(signature_nid);
2084                         if (sig == NULL)
2085                                 {
2086                                 ERR_clear_error();
2087                                 sig = "unknown";
2088                                 }
2089                         if (strstr(sig, "WithRSA") == NULL)
2090                                 {
2091                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2092                                 return 0;
2093                                 }
2094                         }
2095                 }
2096         if (alg_a & SSL_aECDSA)
2097                 {
2098                 /* key usage, if present, must allow signing */
2099                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2100                         {
2101                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2102                         return 0;
2103                         }
2104                 }
2105
2106         return 1;  /* all checks are ok */
2107         }
2108
2109 #endif
2110
2111 /* THIS NEEDS CLEANING UP */
2112 X509 *ssl_get_server_send_cert(SSL *s)
2113         {
2114         unsigned long alg_k,alg_a,mask_k,mask_a;
2115         CERT *c;
2116         int i,is_export;
2117
2118         c=s->cert;
2119         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2120         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2121         if (is_export)
2122                 {
2123                 mask_k = c->export_mask_k;
2124                 mask_a = c->export_mask_a;
2125                 }
2126         else
2127                 {
2128                 mask_k = c->mask_k;
2129                 mask_a = c->mask_a;
2130                 }
2131
2132         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2133         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2134
2135         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2136                 {
2137                 /* we don't need to look at SSL_kEECDH
2138                  * since no certificate is needed for
2139                  * anon ECDH and for authenticated
2140                  * EECDH, the check for the auth
2141                  * algorithm will set i correctly
2142                  * NOTE: For ECDH-RSA, we need an ECC
2143                  * not an RSA cert but for EECDH-RSA
2144                  * we need an RSA cert. Placing the
2145                  * checks for SSL_kECDH before RSA
2146                  * checks ensures the correct cert is chosen.
2147                  */
2148                 i=SSL_PKEY_ECC;
2149                 }
2150         else if (alg_a & SSL_aECDSA)
2151                 {
2152                 i=SSL_PKEY_ECC;
2153                 }
2154         else if (alg_k & SSL_kDHr)
2155                 i=SSL_PKEY_DH_RSA;
2156         else if (alg_k & SSL_kDHd)
2157                 i=SSL_PKEY_DH_DSA;
2158         else if (alg_a & SSL_aDSS)
2159                 i=SSL_PKEY_DSA_SIGN;
2160         else if (alg_a & SSL_aRSA)
2161                 {
2162                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2163                         i=SSL_PKEY_RSA_SIGN;
2164                 else
2165                         i=SSL_PKEY_RSA_ENC;
2166                 }
2167         else if (alg_a & SSL_aKRB5)
2168                 {
2169                 /* VRS something else here? */
2170                 return(NULL);
2171                 }
2172         else if (alg_a & SSL_aGOST94)
2173                 i=SSL_PKEY_GOST94;
2174         else if (alg_a & SSL_aGOST01)
2175                 i=SSL_PKEY_GOST01;
2176         else /* if (alg_a & SSL_aNULL) */
2177                 {
2178                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2179                 return(NULL);
2180                 }
2181         if (c->pkeys[i].x509 == NULL) return(NULL);
2182
2183         return(c->pkeys[i].x509);
2184         }
2185
2186 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2187         {
2188         unsigned long alg_a;
2189         CERT *c;
2190
2191         alg_a = cipher->algorithm_auth;
2192         c=s->cert;
2193
2194         if ((alg_a & SSL_aDSS) &&
2195                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2196                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2197         else if (alg_a & SSL_aRSA)
2198                 {
2199                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2200                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2201                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2202                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2203                 else
2204                         return(NULL);
2205                 }
2206         else if ((alg_a & SSL_aECDSA) &&
2207                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2208                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2209         else /* if (alg_a & SSL_aNULL) */
2210                 {
2211                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2212                 return(NULL);
2213                 }
2214         }
2215
2216 void ssl_update_cache(SSL *s,int mode)
2217         {
2218         int i;
2219
2220         /* If the session_id_length is 0, we are not supposed to cache it,
2221          * and it would be rather hard to do anyway :-) */
2222         if (s->session->session_id_length == 0) return;
2223
2224         i=s->session_ctx->session_cache_mode;
2225         if ((i & mode) && (!s->hit)
2226                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2227                     || SSL_CTX_add_session(s->session_ctx,s->session))
2228                 && (s->session_ctx->new_session_cb != NULL))
2229                 {
2230                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2231                 if (!s->session_ctx->new_session_cb(s,s->session))
2232                         SSL_SESSION_free(s->session);
2233                 }
2234
2235         /* auto flush every 255 connections */
2236         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2237                 ((i & mode) == mode))
2238                 {
2239                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2240                         ?s->session_ctx->stats.sess_connect_good
2241                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2242                         {
2243                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2244                         }
2245                 }
2246         }
2247
2248 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2249         {
2250         return(s->method);
2251         }
2252
2253 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2254         {
2255         int conn= -1;
2256         int ret=1;
2257
2258         if (s->method != meth)
2259                 {
2260                 if (s->handshake_func != NULL)
2261                         conn=(s->handshake_func == s->method->ssl_connect);
2262
2263                 if (s->method->version == meth->version)
2264                         s->method=meth;
2265                 else
2266                         {
2267                         s->method->ssl_free(s);
2268                         s->method=meth;
2269                         ret=s->method->ssl_new(s);
2270                         }
2271
2272                 if (conn == 1)
2273                         s->handshake_func=meth->ssl_connect;
2274                 else if (conn == 0)
2275                         s->handshake_func=meth->ssl_accept;
2276                 }
2277         return(ret);
2278         }
2279
2280 int SSL_get_error(const SSL *s,int i)
2281         {
2282         int reason;
2283         unsigned long l;
2284         BIO *bio;
2285
2286         if (i > 0) return(SSL_ERROR_NONE);
2287
2288         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2289          * etc, where we do encode the error */
2290         if ((l=ERR_peek_error()) != 0)
2291                 {
2292                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2293                         return(SSL_ERROR_SYSCALL);
2294                 else
2295                         return(SSL_ERROR_SSL);
2296                 }
2297
2298         if ((i < 0) && SSL_want_read(s))
2299                 {
2300                 bio=SSL_get_rbio(s);
2301                 if (BIO_should_read(bio))
2302                         return(SSL_ERROR_WANT_READ);
2303                 else if (BIO_should_write(bio))
2304                         /* This one doesn't make too much sense ... We never try
2305                          * to write to the rbio, and an application program where
2306                          * rbio and wbio are separate couldn't even know what it
2307                          * should wait for.
2308                          * However if we ever set s->rwstate incorrectly
2309                          * (so that we have SSL_want_read(s) instead of
2310                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2311                          * this test works around that bug; so it might be safer
2312                          * to keep it. */
2313                         return(SSL_ERROR_WANT_WRITE);
2314                 else if (BIO_should_io_special(bio))
2315                         {
2316                         reason=BIO_get_retry_reason(bio);
2317                         if (reason == BIO_RR_CONNECT)
2318                                 return(SSL_ERROR_WANT_CONNECT);
2319                         else if (reason == BIO_RR_ACCEPT)
2320                                 return(SSL_ERROR_WANT_ACCEPT);
2321                         else
2322                                 return(SSL_ERROR_SYSCALL); /* unknown */
2323                         }
2324                 }
2325
2326         if ((i < 0) && SSL_want_write(s))
2327                 {
2328                 bio=SSL_get_wbio(s);
2329                 if (BIO_should_write(bio))
2330                         return(SSL_ERROR_WANT_WRITE);
2331                 else if (BIO_should_read(bio))
2332                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2333                         return(SSL_ERROR_WANT_READ);
2334                 else if (BIO_should_io_special(bio))
2335                         {
2336                         reason=BIO_get_retry_reason(bio);
2337                         if (reason == BIO_RR_CONNECT)
2338                                 return(SSL_ERROR_WANT_CONNECT);
2339                         else if (reason == BIO_RR_ACCEPT)
2340                                 return(SSL_ERROR_WANT_ACCEPT);
2341                         else
2342                                 return(SSL_ERROR_SYSCALL);
2343                         }
2344                 }
2345         if ((i < 0) && SSL_want_x509_lookup(s))
2346                 {
2347                 return(SSL_ERROR_WANT_X509_LOOKUP);
2348                 }
2349
2350         if (i == 0)
2351                 {
2352                 if (s->version == SSL2_VERSION)
2353                         {
2354                         /* assume it is the socket being closed */
2355                         return(SSL_ERROR_ZERO_RETURN);
2356                         }
2357                 else
2358                         {
2359                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2360                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2361                                 return(SSL_ERROR_ZERO_RETURN);
2362                         }
2363                 }
2364         return(SSL_ERROR_SYSCALL);
2365         }
2366
2367 int SSL_do_handshake(SSL *s)
2368         {
2369         int ret=1;
2370
2371         if (s->handshake_func == NULL)
2372                 {
2373                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2374                 return(-1);
2375                 }
2376
2377         s->method->ssl_renegotiate_check(s);
2378
2379         if (SSL_in_init(s) || SSL_in_before(s))
2380                 {
2381                 ret=s->handshake_func(s);
2382                 }
2383         return(ret);
2384         }
2385
2386 /* For the next 2 functions, SSL_clear() sets shutdown and so
2387  * one of these calls will reset it */
2388 void SSL_set_accept_state(SSL *s)
2389         {
2390         s->server=1;
2391         s->shutdown=0;
2392         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2393         s->handshake_func=s->method->ssl_accept;
2394         /* clear the current cipher */
2395         ssl_clear_cipher_ctx(s);
2396         ssl_clear_hash_ctx(&s->read_hash);
2397         ssl_clear_hash_ctx(&s->write_hash);
2398         }
2399
2400 void SSL_set_connect_state(SSL *s)
2401         {
2402         s->server=0;
2403         s->shutdown=0;
2404         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2405         s->handshake_func=s->method->ssl_connect;
2406         /* clear the current cipher */
2407         ssl_clear_cipher_ctx(s);
2408         ssl_clear_hash_ctx(&s->read_hash);
2409         ssl_clear_hash_ctx(&s->write_hash);
2410         }
2411
2412 int ssl_undefined_function(SSL *s)
2413         {
2414         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2415         return(0);
2416         }
2417
2418 int ssl_undefined_void_function(void)
2419         {
2420         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2421         return(0);
2422         }
2423
2424 int ssl_undefined_const_function(const SSL *s)
2425         {
2426         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2427         return(0);
2428         }
2429
2430 SSL_METHOD *ssl_bad_method(int ver)
2431         {
2432         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2433         return(NULL);
2434         }
2435
2436 const char *SSL_get_version(const SSL *s)
2437         {
2438         if (s->version == TLS1_VERSION)
2439                 return("TLSv1");
2440         else if (s->version == SSL3_VERSION)
2441                 return("SSLv3");
2442         else if (s->version == SSL2_VERSION)
2443                 return("SSLv2");
2444         else
2445                 return("unknown");
2446         }
2447
2448 SSL *SSL_dup(SSL *s)
2449         {
2450         STACK_OF(X509_NAME) *sk;
2451         X509_NAME *xn;
2452         SSL *ret;
2453         int i;
2454
2455         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2456             return(NULL);
2457
2458         ret->version = s->version;
2459         ret->type = s->type;
2460         ret->method = s->method;
2461
2462         if (s->session != NULL)
2463                 {
2464                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2465                 SSL_copy_session_id(ret,s);
2466                 }
2467         else
2468                 {
2469                 /* No session has been established yet, so we have to expect
2470                  * that s->cert or ret->cert will be changed later --
2471                  * they should not both point to the same object,
2472                  * and thus we can't use SSL_copy_session_id. */
2473
2474                 ret->method->ssl_free(ret);
2475                 ret->method = s->method;
2476                 ret->method->ssl_new(ret);
2477
2478                 if (s->cert != NULL)
2479                         {
2480                         if (ret->cert != NULL)
2481                                 {
2482                                 ssl_cert_free(ret->cert);
2483                                 }
2484                         ret->cert = ssl_cert_dup(s->cert);
2485                         if (ret->cert == NULL)
2486                                 goto err;
2487                         }
2488
2489                 SSL_set_session_id_context(ret,
2490                         s->sid_ctx, s->sid_ctx_length);
2491                 }
2492
2493         ret->options=s->options;
2494         ret->mode=s->mode;
2495         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2496         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2497         ret->msg_callback = s->msg_callback;
2498         ret->msg_callback_arg = s->msg_callback_arg;
2499         SSL_set_verify(ret,SSL_get_verify_mode(s),
2500                 SSL_get_verify_callback(s));
2501         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2502         ret->generate_session_id = s->generate_session_id;
2503
2504         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2505
2506         ret->debug=s->debug;
2507
2508         /* copy app data, a little dangerous perhaps */
2509         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2510                 goto err;
2511
2512         /* setup rbio, and wbio */
2513         if (s->rbio != NULL)
2514                 {
2515                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2516                         goto err;
2517                 }
2518         if (s->wbio != NULL)
2519                 {
2520                 if (s->wbio != s->rbio)
2521                         {
2522                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2523                                 goto err;
2524                         }
2525                 else
2526                         ret->wbio=ret->rbio;
2527                 }
2528         ret->rwstate = s->rwstate;
2529         ret->in_handshake = s->in_handshake;
2530         ret->handshake_func = s->handshake_func;
2531         ret->server = s->server;
2532         ret->new_session = s->new_session;
2533         ret->quiet_shutdown = s->quiet_shutdown;
2534         ret->shutdown=s->shutdown;
2535         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2536         ret->rstate=s->rstate;
2537         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2538         ret->hit=s->hit;
2539
2540         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2541
2542         /* dup the cipher_list and cipher_list_by_id stacks */
2543         if (s->cipher_list != NULL)
2544                 {
2545                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2546                         goto err;
2547                 }
2548         if (s->cipher_list_by_id != NULL)
2549                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2550                         == NULL)
2551                         goto err;
2552
2553         /* Dup the client_CA list */
2554         if (s->client_CA != NULL)
2555                 {
2556                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2557                 ret->client_CA=sk;
2558                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2559                         {
2560                         xn=sk_X509_NAME_value(sk,i);
2561                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2562                                 {
2563                                 X509_NAME_free(xn);
2564                                 goto err;
2565                                 }
2566                         }
2567                 }
2568
2569         if (0)
2570                 {
2571 err:
2572                 if (ret != NULL) SSL_free(ret);
2573                 ret=NULL;
2574                 }
2575         return(ret);
2576         }
2577
2578 void ssl_clear_cipher_ctx(SSL *s)
2579         {
2580         if (s->enc_read_ctx != NULL)
2581                 {
2582                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2583                 OPENSSL_free(s->enc_read_ctx);
2584                 s->enc_read_ctx=NULL;
2585                 }
2586         if (s->enc_write_ctx != NULL)
2587                 {
2588                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2589                 OPENSSL_free(s->enc_write_ctx);
2590                 s->enc_write_ctx=NULL;
2591                 }
2592 #ifndef OPENSSL_NO_COMP
2593         if (s->expand != NULL)
2594                 {
2595                 COMP_CTX_free(s->expand);
2596                 s->expand=NULL;
2597                 }
2598         if (s->compress != NULL)
2599                 {
2600                 COMP_CTX_free(s->compress);
2601                 s->compress=NULL;
2602                 }
2603 #endif
2604         }
2605
2606 /* Fix this function so that it takes an optional type parameter */
2607 X509 *SSL_get_certificate(const SSL *s)
2608         {
2609         if (s->cert != NULL)
2610                 return(s->cert->key->x509);
2611         else
2612                 return(NULL);
2613         }
2614
2615 /* Fix this function so that it takes an optional type parameter */
2616 EVP_PKEY *SSL_get_privatekey(SSL *s)
2617         {
2618         if (s->cert != NULL)
2619                 return(s->cert->key->privatekey);
2620         else
2621                 return(NULL);
2622         }
2623
2624 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2625         {
2626         if ((s->session != NULL) && (s->session->cipher != NULL))
2627                 return(s->session->cipher);
2628         return(NULL);
2629         }
2630 #ifdef OPENSSL_NO_COMP
2631 const void *SSL_get_current_compression(SSL *s)
2632         {
2633         return NULL;
2634         }
2635 const void *SSL_get_current_expansion(SSL *s)
2636         {
2637         return NULL;
2638         }
2639 #else
2640
2641 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2642         {
2643         if (s->compress != NULL)
2644                 return(s->compress->meth);
2645         return(NULL);
2646         }
2647
2648 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2649         {
2650         if (s->expand != NULL)
2651                 return(s->expand->meth);
2652         return(NULL);
2653         }
2654 #endif
2655
2656 int ssl_init_wbio_buffer(SSL *s,int push)
2657         {
2658         BIO *bbio;
2659
2660         if (s->bbio == NULL)
2661                 {
2662                 bbio=BIO_new(BIO_f_buffer());
2663                 if (bbio == NULL) return(0);
2664                 s->bbio=bbio;
2665                 }
2666         else
2667                 {
2668                 bbio=s->bbio;
2669                 if (s->bbio == s->wbio)
2670                         s->wbio=BIO_pop(s->wbio);
2671                 }
2672         (void)BIO_reset(bbio);
2673 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2674         if (!BIO_set_read_buffer_size(bbio,1))
2675                 {
2676                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2677                 return(0);
2678                 }
2679         if (push)
2680                 {
2681                 if (s->wbio != bbio)
2682                         s->wbio=BIO_push(bbio,s->wbio);
2683                 }
2684         else
2685                 {
2686                 if (s->wbio == bbio)
2687                         s->wbio=BIO_pop(bbio);
2688                 }
2689         return(1);
2690         }
2691
2692 void ssl_free_wbio_buffer(SSL *s)
2693         {
2694         if (s->bbio == NULL) return;
2695
2696         if (s->bbio == s->wbio)
2697                 {
2698                 /* remove buffering */
2699                 s->wbio=BIO_pop(s->wbio);
2700 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2701                 assert(s->wbio != NULL);
2702 #endif
2703         }
2704         BIO_free(s->bbio);
2705         s->bbio=NULL;
2706         }
2707
2708 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2709         {
2710         ctx->quiet_shutdown=mode;
2711         }
2712
2713 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2714         {
2715         return(ctx->quiet_shutdown);
2716         }
2717
2718 void SSL_set_quiet_shutdown(SSL *s,int mode)
2719         {
2720         s->quiet_shutdown=mode;
2721         }
2722
2723 int SSL_get_quiet_shutdown(const SSL *s)
2724         {
2725         return(s->quiet_shutdown);
2726         }
2727
2728 void SSL_set_shutdown(SSL *s,int mode)
2729         {
2730         s->shutdown=mode;
2731         }
2732
2733 int SSL_get_shutdown(const SSL *s)
2734         {
2735         return(s->shutdown);
2736         }
2737
2738 int SSL_version(const SSL *s)
2739         {
2740         return(s->version);
2741         }
2742
2743 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2744         {
2745         return(ssl->ctx);
2746         }
2747
2748 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2749         {
2750         if (ssl->ctx == ctx)
2751                 return ssl->ctx;
2752 #ifndef OPENSSL_NO_TLSEXT
2753         if (ctx == NULL)
2754                 ctx = ssl->initial_ctx;
2755 #endif
2756         if (ssl->cert != NULL)
2757                 ssl_cert_free(ssl->cert);
2758         ssl->cert = ssl_cert_dup(ctx->cert);
2759         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2760         if (ssl->ctx != NULL)
2761                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2762         ssl->ctx = ctx;
2763         return(ssl->ctx);
2764         }
2765
2766 #ifndef OPENSSL_NO_STDIO
2767 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2768         {
2769         return(X509_STORE_set_default_paths(ctx->cert_store));
2770         }
2771
2772 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2773                 const char *CApath)
2774         {
2775         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2776         }
2777 #endif
2778
2779 void SSL_set_info_callback(SSL *ssl,
2780         void (*cb)(const SSL *ssl,int type,int val))
2781         {
2782         ssl->info_callback=cb;
2783         }
2784
2785 /* One compiler (Diab DCC) doesn't like argument names in returned
2786    function pointer.  */
2787 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2788         {
2789         return ssl->info_callback;
2790         }
2791
2792 int SSL_state(const SSL *ssl)
2793         {
2794         return(ssl->state);
2795         }
2796
2797 void SSL_set_verify_result(SSL *ssl,long arg)
2798         {
2799         ssl->verify_result=arg;
2800         }
2801
2802 long SSL_get_verify_result(const SSL *ssl)
2803         {
2804         return(ssl->verify_result);
2805         }
2806
2807 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2808                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2809         {
2810         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2811                                 new_func, dup_func, free_func);
2812         }
2813
2814 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2815         {
2816         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2817         }
2818
2819 void *SSL_get_ex_data(const SSL *s,int idx)
2820         {
2821         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2822         }
2823
2824 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2825                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2826         {
2827         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2828                                 new_func, dup_func, free_func);
2829         }
2830
2831 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2832         {
2833         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2834         }
2835
2836 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2837         {
2838         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2839         }
2840
2841 int ssl_ok(SSL *s)
2842         {
2843         return(1);
2844         }
2845
2846 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2847         {
2848         return(ctx->cert_store);
2849         }
2850
2851 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2852         {
2853         if (ctx->cert_store != NULL)
2854                 X509_STORE_free(ctx->cert_store);
2855         ctx->cert_store=store;
2856         }
2857
2858 int SSL_want(const SSL *s)
2859         {
2860         return(s->rwstate);
2861         }
2862
2863 /*!
2864  * \brief Set the callback for generating temporary RSA keys.
2865  * \param ctx the SSL context.
2866  * \param cb the callback
2867  */
2868
2869 #ifndef OPENSSL_NO_RSA
2870 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2871                                                           int is_export,
2872                                                           int keylength))
2873     {
2874     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2875     }
2876
2877 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2878                                                   int is_export,
2879                                                   int keylength))
2880     {
2881     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2882     }
2883 #endif
2884
2885 #ifdef DOXYGEN
2886 /*!
2887  * \brief The RSA temporary key callback function.
2888  * \param ssl the SSL session.
2889  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2890  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2891  * of the required key in bits.
2892  * \return the temporary RSA key.
2893  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2894  */
2895
2896 RSA *cb(SSL *ssl,int is_export,int keylength)
2897     {}
2898 #endif
2899
2900 /*!
2901  * \brief Set the callback for generating temporary DH keys.
2902  * \param ctx the SSL context.
2903  * \param dh the callback
2904  */
2905
2906 #ifndef OPENSSL_NO_DH
2907 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2908                                                         int keylength))
2909         {
2910         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2911         }
2912
2913 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2914                                                 int keylength))
2915         {
2916         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2917         }
2918 #endif
2919
2920 #ifndef OPENSSL_NO_ECDH
2921 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2922                                                                 int keylength))
2923         {
2924         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2925         }
2926
2927 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2928                                                         int keylength))
2929         {
2930         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2931         }
2932 #endif
2933
2934 #ifndef OPENSSL_NO_PSK
2935 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2936         {
2937         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2938                 {
2939                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2940                 return 0;
2941                 }
2942         if (ctx->psk_identity_hint != NULL)
2943                 OPENSSL_free(ctx->psk_identity_hint);
2944         if (identity_hint != NULL)
2945                 {
2946                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2947                 if (ctx->psk_identity_hint == NULL)
2948                         return 0;
2949                 }
2950         else
2951                 ctx->psk_identity_hint = NULL;
2952         return 1;
2953         }
2954
2955 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2956         {
2957         if (s == NULL)
2958                 return 0;
2959
2960         if (s->session == NULL)
2961                 return 1; /* session not created yet, ignored */
2962
2963         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2964                 {
2965                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2966                 return 0;
2967                 }
2968         if (s->session->psk_identity_hint != NULL)
2969                 OPENSSL_free(s->session->psk_identity_hint);
2970         if (identity_hint != NULL)
2971                 {
2972                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2973                 if (s->session->psk_identity_hint == NULL)
2974                         return 0;
2975                 }
2976         else
2977                 s->session->psk_identity_hint = NULL;
2978         return 1;
2979         }
2980
2981 const char *SSL_get_psk_identity_hint(const SSL *s)
2982         {
2983         if (s == NULL || s->session == NULL)
2984                 return NULL;
2985         return(s->session->psk_identity_hint);
2986         }
2987
2988 const char *SSL_get_psk_identity(const SSL *s)
2989         {
2990         if (s == NULL || s->session == NULL)
2991                 return NULL;
2992         return(s->session->psk_identity);
2993         }
2994
2995 void SSL_set_psk_client_callback(SSL *s,
2996     unsigned int (*cb)(SSL *ssl, const char *hint,
2997                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2998                        unsigned int max_psk_len))
2999         {
3000         s->psk_client_callback = cb;
3001         }
3002
3003 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3004     unsigned int (*cb)(SSL *ssl, const char *hint,
3005                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3006                        unsigned int max_psk_len))
3007         {
3008         ctx->psk_client_callback = cb;
3009         }
3010
3011 void SSL_set_psk_server_callback(SSL *s,
3012     unsigned int (*cb)(SSL *ssl, const char *identity,
3013                        unsigned char *psk, unsigned int max_psk_len))
3014         {
3015         s->psk_server_callback = cb;
3016         }
3017
3018 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3019     unsigned int (*cb)(SSL *ssl, const char *identity,
3020                        unsigned char *psk, unsigned int max_psk_len))
3021         {
3022         ctx->psk_server_callback = cb;
3023         }
3024 #endif
3025
3026 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))
3027         {
3028         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3029         }
3030 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))
3031         {
3032         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3033         }
3034
3035 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3036  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3037  * any. If EVP_MD pointer is passed, initializes ctx with this md
3038  * Returns newly allocated ctx;
3039  */
3040
3041 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3042 {
3043         ssl_clear_hash_ctx(hash);
3044         *hash = EVP_MD_CTX_create();
3045         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3046         return *hash;
3047 }
3048 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3049 {
3050
3051         if (*hash) EVP_MD_CTX_destroy(*hash);
3052         *hash=NULL;
3053 }
3054
3055 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3056 #include "../crypto/bio/bss_file.c"
3057 #endif
3058
3059 IMPLEMENT_STACK_OF(SSL_CIPHER)
3060 IMPLEMENT_STACK_OF(SSL_COMP)
3061 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3062                                     ssl_cipher_id);
3063