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->renegotiate) return(1);
 206 #else
 207         if (s->renegotiate)
 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->renegotiate == 0)
1012                 s->renegotiate=1;
1013
1014         s->new_session=1;
1015
1016         return(s->method->ssl_renegotiate(s));
1017         }
1018
1019 int SSL_renegotiate_abbreviated(SSL *s)
1020 {
1021         if (s->renegotiate == 0)
1022                 s->renegotiate=1;
1023
1024         s->new_session=0;
1025
1026         return(s->method->ssl_renegotiate(s));
1027 }
1028
1029 int SSL_renegotiate_pending(SSL *s)
1030         {
1031         /* becomes true when negotiation is requested;
1032          * false again once a handshake has finished */
1033         return (s->renegotiate != 0);
1034         }
1035
1036 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1037         {
1038         long l;
1039
1040         switch (cmd)
1041                 {
1042         case SSL_CTRL_GET_READ_AHEAD:
1043                 return(s->read_ahead);
1044         case SSL_CTRL_SET_READ_AHEAD:
1045                 l=s->read_ahead;
1046                 s->read_ahead=larg;
1047                 return(l);
1048
1049         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1050                 s->msg_callback_arg = parg;
1051                 return 1;
1052
1053         case SSL_CTRL_OPTIONS:
1054                 return(s->options|=larg);
1055         case SSL_CTRL_CLEAR_OPTIONS:
1056                 return(s->options&=~larg);
1057         case SSL_CTRL_MODE:
1058                 return(s->mode|=larg);
1059         case SSL_CTRL_CLEAR_MODE:
1060                 return(s->mode &=~larg);
1061         case SSL_CTRL_GET_MAX_CERT_LIST:
1062                 return(s->max_cert_list);
1063         case SSL_CTRL_SET_MAX_CERT_LIST:
1064                 l=s->max_cert_list;
1065                 s->max_cert_list=larg;
1066                 return(l);
1067         case SSL_CTRL_SET_MTU:
1068                 if (SSL_version(s) == DTLS1_VERSION ||
1069                     SSL_version(s) == DTLS1_BAD_VER)
1070                         {
1071                         s->d1->mtu = larg;
1072                         return larg;
1073                         }
1074                 return 0;
1075         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1076                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1077                         return 0;
1078                 s->max_send_fragment = larg;
1079                 return 1;
1080         case SSL_CTRL_GET_RI_SUPPORT:
1081                 if (s->s3)
1082                         return s->s3->send_connection_binding;
1083                 else return 0;
1084         default:
1085                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1086                 }
1087         }
1088
1089 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1090         {
1091         switch(cmd)
1092                 {
1093         case SSL_CTRL_SET_MSG_CALLBACK:
1094                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1095                 return 1;
1096
1097         default:
1098                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1099                 }
1100         }
1101
1102 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1103         {
1104         return ctx->sessions;
1105         }
1106
1107 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1108         {
1109         long l;
1110
1111         switch (cmd)
1112                 {
1113         case SSL_CTRL_GET_READ_AHEAD:
1114                 return(ctx->read_ahead);
1115         case SSL_CTRL_SET_READ_AHEAD:
1116                 l=ctx->read_ahead;
1117                 ctx->read_ahead=larg;
1118                 return(l);
1119
1120         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1121                 ctx->msg_callback_arg = parg;
1122                 return 1;
1123
1124         case SSL_CTRL_GET_MAX_CERT_LIST:
1125                 return(ctx->max_cert_list);
1126         case SSL_CTRL_SET_MAX_CERT_LIST:
1127                 l=ctx->max_cert_list;
1128                 ctx->max_cert_list=larg;
1129                 return(l);
1130
1131         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1132                 l=ctx->session_cache_size;
1133                 ctx->session_cache_size=larg;
1134                 return(l);
1135         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1136                 return(ctx->session_cache_size);
1137         case SSL_CTRL_SET_SESS_CACHE_MODE:
1138                 l=ctx->session_cache_mode;
1139                 ctx->session_cache_mode=larg;
1140                 return(l);
1141         case SSL_CTRL_GET_SESS_CACHE_MODE:
1142                 return(ctx->session_cache_mode);
1143
1144         case SSL_CTRL_SESS_NUMBER:
1145                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1146         case SSL_CTRL_SESS_CONNECT:
1147                 return(ctx->stats.sess_connect);
1148         case SSL_CTRL_SESS_CONNECT_GOOD:
1149                 return(ctx->stats.sess_connect_good);
1150         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1151                 return(ctx->stats.sess_connect_renegotiate);
1152         case SSL_CTRL_SESS_ACCEPT:
1153                 return(ctx->stats.sess_accept);
1154         case SSL_CTRL_SESS_ACCEPT_GOOD:
1155                 return(ctx->stats.sess_accept_good);
1156         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1157                 return(ctx->stats.sess_accept_renegotiate);
1158         case SSL_CTRL_SESS_HIT:
1159                 return(ctx->stats.sess_hit);
1160         case SSL_CTRL_SESS_CB_HIT:
1161                 return(ctx->stats.sess_cb_hit);
1162         case SSL_CTRL_SESS_MISSES:
1163                 return(ctx->stats.sess_miss);
1164         case SSL_CTRL_SESS_TIMEOUTS:
1165                 return(ctx->stats.sess_timeout);
1166         case SSL_CTRL_SESS_CACHE_FULL:
1167                 return(ctx->stats.sess_cache_full);
1168         case SSL_CTRL_OPTIONS:
1169                 return(ctx->options|=larg);
1170         case SSL_CTRL_CLEAR_OPTIONS:
1171                 return(ctx->options&=~larg);
1172         case SSL_CTRL_MODE:
1173                 return(ctx->mode|=larg);
1174         case SSL_CTRL_CLEAR_MODE:
1175                 return(ctx->mode&=~larg);
1176         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1177                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1178                         return 0;
1179                 ctx->max_send_fragment = larg;
1180                 return 1;
1181         default:
1182                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1183                 }
1184         }
1185
1186 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1187         {
1188         switch(cmd)
1189                 {
1190         case SSL_CTRL_SET_MSG_CALLBACK:
1191                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1192                 return 1;
1193
1194         default:
1195                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1196                 }
1197         }
1198
1199 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1200         {
1201         long l;
1202
1203         l=a->id-b->id;
1204         if (l == 0L)
1205                 return(0);
1206         else
1207                 return((l > 0)?1:-1);
1208         }
1209
1210 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1211                         const SSL_CIPHER * const *bp)
1212         {
1213         long l;
1214
1215         l=(*ap)->id-(*bp)->id;
1216         if (l == 0L)
1217                 return(0);
1218         else
1219                 return((l > 0)?1:-1);
1220         }
1221
1222 /** return a STACK of the ciphers available for the SSL and in order of
1223  * preference */
1224 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1225         {
1226         if (s != NULL)
1227                 {
1228                 if (s->cipher_list != NULL)
1229                         {
1230                         return(s->cipher_list);
1231                         }
1232                 else if ((s->ctx != NULL) &&
1233                         (s->ctx->cipher_list != NULL))
1234                         {
1235                         return(s->ctx->cipher_list);
1236                         }
1237                 }
1238         return(NULL);
1239         }
1240
1241 /** return a STACK of the ciphers available for the SSL and in order of
1242  * algorithm id */
1243 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1244         {
1245         if (s != NULL)
1246                 {
1247                 if (s->cipher_list_by_id != NULL)
1248                         {
1249                         return(s->cipher_list_by_id);
1250                         }
1251                 else if ((s->ctx != NULL) &&
1252                         (s->ctx->cipher_list_by_id != NULL))
1253                         {
1254                         return(s->ctx->cipher_list_by_id);
1255                         }
1256                 }
1257         return(NULL);
1258         }
1259
1260 /** The old interface to get the same thing as SSL_get_ciphers() */
1261 const char *SSL_get_cipher_list(const SSL *s,int n)
1262         {
1263         SSL_CIPHER *c;
1264         STACK_OF(SSL_CIPHER) *sk;
1265
1266         if (s == NULL) return(NULL);
1267         sk=SSL_get_ciphers(s);
1268         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1269                 return(NULL);
1270         c=sk_SSL_CIPHER_value(sk,n);
1271         if (c == NULL) return(NULL);
1272         return(c->name);
1273         }
1274
1275 /** specify the ciphers to be used by default by the SSL_CTX */
1276 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1277         {
1278         STACK_OF(SSL_CIPHER) *sk;
1279
1280         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1281                 &ctx->cipher_list_by_id,str);
1282         /* ssl_create_cipher_list may return an empty stack if it
1283          * was unable to find a cipher matching the given rule string
1284          * (for example if the rule string specifies a cipher which
1285          * has been disabled). This is not an error as far as
1286          * ssl_create_cipher_list is concerned, and hence
1287          * ctx->cipher_list and ctx->cipher_list_by_id has been
1288          * updated. */
1289         if (sk == NULL)
1290                 return 0;
1291         else if (sk_SSL_CIPHER_num(sk) == 0)
1292                 {
1293                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1294                 return 0;
1295                 }
1296         return 1;
1297         }
1298
1299 /** specify the ciphers to be used by the SSL */
1300 int SSL_set_cipher_list(SSL *s,const char *str)
1301         {
1302         STACK_OF(SSL_CIPHER) *sk;
1303
1304         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1305                 &s->cipher_list_by_id,str);
1306         /* see comment in SSL_CTX_set_cipher_list */
1307         if (sk == NULL)
1308                 return 0;
1309         else if (sk_SSL_CIPHER_num(sk) == 0)
1310                 {
1311                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1312                 return 0;
1313                 }
1314         return 1;
1315         }
1316
1317 /* works well for SSLv2, not so good for SSLv3 */
1318 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1319         {
1320         char *p;
1321         STACK_OF(SSL_CIPHER) *sk;
1322         SSL_CIPHER *c;
1323         int i;
1324
1325         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1326                 (len < 2))
1327                 return(NULL);
1328
1329         p=buf;
1330         sk=s->session->ciphers;
1331         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1332                 {
1333                 int n;
1334
1335                 c=sk_SSL_CIPHER_value(sk,i);
1336                 n=strlen(c->name);
1337                 if (n+1 > len)
1338                         {
1339                         if (p != buf)
1340                                 --p;
1341                         *p='\0';
1342                         return buf;
1343                         }
1344                 strcpy(p,c->name);
1345                 p+=n;
1346                 *(p++)=':';
1347                 len-=n+1;
1348                 }
1349         p[-1]='\0';
1350         return(buf);
1351         }
1352
1353 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1354                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1355         {
1356         int i,j=0;
1357         SSL_CIPHER *c;
1358         unsigned char *q;
1359 #ifndef OPENSSL_NO_KRB5
1360         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1361 #endif /* OPENSSL_NO_KRB5 */
1362
1363         if (sk == NULL) return(0);
1364         q=p;
1365
1366         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1367                 {
1368                 c=sk_SSL_CIPHER_value(sk,i);
1369                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1370                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1371                         (TLS1_get_version(s) < TLS1_2_VERSION))
1372                         continue;
1373 #ifndef OPENSSL_NO_KRB5
1374                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1375                     nokrb5)
1376                     continue;
1377 #endif /* OPENSSL_NO_KRB5 */
1378 #ifndef OPENSSL_NO_PSK
1379                 /* with PSK there must be client callback set */
1380                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1381                     s->psk_client_callback == NULL)
1382                         continue;
1383 #endif /* OPENSSL_NO_PSK */
1384                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1385                 p+=j;
1386                 }
1387         /* If p == q, no ciphers and caller indicates an error. Otherwise
1388          * add SCSV if not renegotiating.
1389          */
1390         if (p != q && !s->renegotiate)
1391                 {
1392                 static SSL_CIPHER scsv =
1393                         {
1394                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1395                         };
1396                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1397                 p+=j;
1398 #ifdef OPENSSL_RI_DEBUG
1399                 fprintf(stderr, "SCSV sent by client\n");
1400 #endif
1401                 }
1402
1403         return(p-q);
1404         }
1405
1406 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1407                                                STACK_OF(SSL_CIPHER) **skp)
1408         {
1409         const SSL_CIPHER *c;
1410         STACK_OF(SSL_CIPHER) *sk;
1411         int i,n;
1412         if (s->s3)
1413                 s->s3->send_connection_binding = 0;
1414
1415         n=ssl_put_cipher_by_char(s,NULL,NULL);
1416         if ((num%n) != 0)
1417                 {
1418                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1419                 return(NULL);
1420                 }
1421         if ((skp == NULL) || (*skp == NULL))
1422                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1423         else
1424                 {
1425                 sk= *skp;
1426                 sk_SSL_CIPHER_zero(sk);
1427                 }
1428
1429         for (i=0; i<num; i+=n)
1430                 {
1431                 /* Check for SCSV */
1432                 if (s->s3 && (n != 3 || !p[0]) &&
1433                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1434                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1435                         {
1436                         /* SCSV fatal if renegotiating */
1437                         if (s->renegotiate)
1438                                 {
1439                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1440                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1441                                 goto err;
1442                                 }
1443                         s->s3->send_connection_binding = 1;
1444                         p += n;
1445 #ifdef OPENSSL_RI_DEBUG
1446                         fprintf(stderr, "SCSV received by server\n");
1447 #endif
1448                         continue;
1449                         }
1450
1451                 c=ssl_get_cipher_by_char(s,p);
1452                 p+=n;
1453                 if (c != NULL)
1454                         {
1455                         if (!sk_SSL_CIPHER_push(sk,c))
1456                                 {
1457                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1458                                 goto err;
1459                                 }
1460                         }
1461                 }
1462
1463         if (skp != NULL)
1464                 *skp=sk;
1465         return(sk);
1466 err:
1467         if ((skp == NULL) || (*skp == NULL))
1468                 sk_SSL_CIPHER_free(sk);
1469         return(NULL);
1470         }
1471
1472
1473 #ifndef OPENSSL_NO_TLSEXT
1474 /** return a servername extension value if provided in Client Hello, or NULL.
1475  * So far, only host_name types are defined (RFC 3546).
1476  */
1477
1478 const char *SSL_get_servername(const SSL *s, const int type)
1479         {
1480         if (type != TLSEXT_NAMETYPE_host_name)
1481                 return NULL;
1482
1483         return s->session && !s->tlsext_hostname ?
1484                 s->session->tlsext_hostname :
1485                 s->tlsext_hostname;
1486         }
1487
1488 int SSL_get_servername_type(const SSL *s)
1489         {
1490         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1491                 return TLSEXT_NAMETYPE_host_name;
1492         return -1;
1493         }
1494 #endif
1495
1496 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1497         {
1498         unsigned long l;
1499
1500         l=(unsigned long)
1501                 ((unsigned int) a->session_id[0]     )|
1502                 ((unsigned int) a->session_id[1]<< 8L)|
1503                 ((unsigned long)a->session_id[2]<<16L)|
1504                 ((unsigned long)a->session_id[3]<<24L);
1505         return(l);
1506         }
1507
1508 /* NB: If this function (or indeed the hash function which uses a sort of
1509  * coarser function than this one) is changed, ensure
1510  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1511  * able to construct an SSL_SESSION that will collide with any existing session
1512  * with a matching session ID. */
1513 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1514         {
1515         if (a->ssl_version != b->ssl_version)
1516                 return(1);
1517         if (a->session_id_length != b->session_id_length)
1518                 return(1);
1519         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1520         }
1521
1522 /* These wrapper functions should remain rather than redeclaring
1523  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1524  * variable. The reason is that the functions aren't static, they're exposed via
1525  * ssl.h. */
1526 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1527 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1528
1529 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1530         {
1531         SSL_CTX *ret=NULL;
1532
1533         if (meth == NULL)
1534                 {
1535                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1536                 return(NULL);
1537                 }
1538
1539 #ifdef OPENSSL_FIPS
1540         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1541                 {
1542                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1543                 return NULL;
1544                 }
1545 #endif
1546
1547         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1548                 {
1549                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1550                 goto err;
1551                 }
1552         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1553         if (ret == NULL)
1554                 goto err;
1555
1556         memset(ret,0,sizeof(SSL_CTX));
1557
1558         ret->method=meth;
1559
1560         ret->cert_store=NULL;
1561         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1562         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1563         ret->session_cache_head=NULL;
1564         ret->session_cache_tail=NULL;
1565
1566         /* We take the system default */
1567         ret->session_timeout=meth->get_timeout();
1568
1569         ret->new_session_cb=0;
1570         ret->remove_session_cb=0;
1571         ret->get_session_cb=0;
1572         ret->generate_session_id=0;
1573
1574         memset((char *)&ret->stats,0,sizeof(ret->stats));
1575
1576         ret->references=1;
1577         ret->quiet_shutdown=0;
1578
1579 /*      ret->cipher=NULL;*/
1580 /*      ret->s2->challenge=NULL;
1581         ret->master_key=NULL;
1582         ret->key_arg=NULL;
1583         ret->s2->conn_id=NULL; */
1584
1585         ret->info_callback=NULL;
1586
1587         ret->app_verify_callback=0;
1588         ret->app_verify_arg=NULL;
1589
1590         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1591         ret->read_ahead=0;
1592         ret->msg_callback=0;
1593         ret->msg_callback_arg=NULL;
1594         ret->verify_mode=SSL_VERIFY_NONE;
1595 #if 0
1596         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1597 #endif
1598         ret->sid_ctx_length=0;
1599         ret->default_verify_callback=NULL;
1600         if ((ret->cert=ssl_cert_new()) == NULL)
1601                 goto err;
1602
1603         ret->default_passwd_callback=0;
1604         ret->default_passwd_callback_userdata=NULL;
1605         ret->client_cert_cb=0;
1606         ret->app_gen_cookie_cb=0;
1607         ret->app_verify_cookie_cb=0;
1608
1609         ret->sessions=lh_SSL_SESSION_new();
1610         if (ret->sessions == NULL) goto err;
1611         ret->cert_store=X509_STORE_new();
1612         if (ret->cert_store == NULL) goto err;
1613
1614         ssl_create_cipher_list(ret->method,
1615                 &ret->cipher_list,&ret->cipher_list_by_id,
1616                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1617         if (ret->cipher_list == NULL
1618             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1619                 {
1620                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1621                 goto err2;
1622                 }
1623
1624         ret->param = X509_VERIFY_PARAM_new();
1625         if (!ret->param)
1626                 goto err;
1627
1628         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1629                 {
1630                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1631                 goto err2;
1632                 }
1633         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1634                 {
1635                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1636                 goto err2;
1637                 }
1638         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1639                 {
1640                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1641                 goto err2;
1642                 }
1643
1644         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1645                 goto err;
1646
1647         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1648
1649         ret->extra_certs=NULL;
1650         ret->comp_methods=SSL_COMP_get_compression_methods();
1651
1652         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1653
1654 #ifndef OPENSSL_NO_TLSEXT
1655         ret->tlsext_servername_callback = 0;
1656         ret->tlsext_servername_arg = NULL;
1657         /* Setup RFC4507 ticket keys */
1658         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1659                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1660                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1661                 ret->options |= SSL_OP_NO_TICKET;
1662
1663         ret->tlsext_status_cb = 0;
1664         ret->tlsext_status_arg = NULL;
1665
1666 #endif
1667 #ifndef OPENSSL_NO_PSK
1668         ret->psk_identity_hint=NULL;
1669         ret->psk_client_callback=NULL;
1670         ret->psk_server_callback=NULL;
1671 #endif
1672 #ifndef OPENSSL_NO_SRP
1673         SSL_CTX_SRP_CTX_init(ret);
1674 #endif
1675 #ifndef OPENSSL_NO_BUF_FREELISTS
1676         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1677         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1678         if (!ret->rbuf_freelist)
1679                 goto err;
1680         ret->rbuf_freelist->chunklen = 0;
1681         ret->rbuf_freelist->len = 0;
1682         ret->rbuf_freelist->head = NULL;
1683         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1684         if (!ret->wbuf_freelist)
1685                 {
1686                 OPENSSL_free(ret->rbuf_freelist);
1687                 goto err;
1688                 }
1689         ret->wbuf_freelist->chunklen = 0;
1690         ret->wbuf_freelist->len = 0;
1691         ret->wbuf_freelist->head = NULL;
1692 #endif
1693 #ifndef OPENSSL_NO_ENGINE
1694         ret->client_cert_engine = NULL;
1695 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1696 #define eng_strx(x)     #x
1697 #define eng_str(x)      eng_strx(x)
1698         /* Use specific client engine automatically... ignore errors */
1699         {
1700         ENGINE *eng;
1701         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1702         if (!eng)
1703                 {
1704                 ERR_clear_error();
1705                 ENGINE_load_builtin_engines();
1706                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1707                 }
1708         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1709                 ERR_clear_error();
1710         }
1711 #endif
1712 #endif
1713         /* Default is to connect to non-RI servers. When RI is more widely
1714          * deployed might change this.
1715          */
1716         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1717         /* Disable TLS v1.2 by default for now */
1718         ret->options |= SSL_OP_NO_TLSv1_2;
1719
1720         return(ret);
1721 err:
1722         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1723 err2:
1724         if (ret != NULL) SSL_CTX_free(ret);
1725         return(NULL);
1726         }
1727
1728 #if 0
1729 static void SSL_COMP_free(SSL_COMP *comp)
1730     { OPENSSL_free(comp); }
1731 #endif
1732
1733 #ifndef OPENSSL_NO_BUF_FREELISTS
1734 static void
1735 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1736         {
1737         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1738         for (ent = list->head; ent; ent = next)
1739                 {
1740                 next = ent->next;
1741                 OPENSSL_free(ent);
1742                 }
1743         OPENSSL_free(list);
1744         }
1745 #endif
1746
1747 void SSL_CTX_free(SSL_CTX *a)
1748         {
1749         int i;
1750
1751         if (a == NULL) return;
1752
1753         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1754 #ifdef REF_PRINT
1755         REF_PRINT("SSL_CTX",a);
1756 #endif
1757         if (i > 0) return;
1758 #ifdef REF_CHECK
1759         if (i < 0)
1760                 {
1761                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1762                 abort(); /* ok */
1763                 }
1764 #endif
1765
1766         if (a->param)
1767                 X509_VERIFY_PARAM_free(a->param);
1768
1769         /*
1770          * Free internal session cache. However: the remove_cb() may reference
1771          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1772          * after the sessions were flushed.
1773          * As the ex_data handling routines might also touch the session cache,
1774          * the most secure solution seems to be: empty (flush) the cache, then
1775          * free ex_data, then finally free the cache.
1776          * (See ticket [openssl.org #212].)
1777          */
1778         if (a->sessions != NULL)
1779                 SSL_CTX_flush_sessions(a,0);
1780
1781         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1782
1783         if (a->sessions != NULL)
1784                 lh_SSL_SESSION_free(a->sessions);
1785
1786         if (a->cert_store != NULL)
1787                 X509_STORE_free(a->cert_store);
1788         if (a->cipher_list != NULL)
1789                 sk_SSL_CIPHER_free(a->cipher_list);
1790         if (a->cipher_list_by_id != NULL)
1791                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1792         if (a->cert != NULL)
1793                 ssl_cert_free(a->cert);
1794         if (a->client_CA != NULL)
1795                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1796         if (a->extra_certs != NULL)
1797                 sk_X509_pop_free(a->extra_certs,X509_free);
1798 #if 0 /* This should never be done, since it removes a global database */
1799         if (a->comp_methods != NULL)
1800                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1801 #else
1802         a->comp_methods = NULL;
1803 #endif
1804
1805 #ifndef OPENSSL_NO_PSK
1806         if (a->psk_identity_hint)
1807                 OPENSSL_free(a->psk_identity_hint);
1808 #endif
1809 #ifndef OPENSSL_NO_SRP
1810         SSL_CTX_SRP_CTX_free(a);
1811 #endif
1812 #ifndef OPENSSL_NO_ENGINE
1813         if (a->client_cert_engine)
1814                 ENGINE_finish(a->client_cert_engine);
1815 #endif
1816
1817 #ifndef OPENSSL_NO_BUF_FREELISTS
1818         if (a->wbuf_freelist)
1819                 ssl_buf_freelist_free(a->wbuf_freelist);
1820         if (a->rbuf_freelist)
1821                 ssl_buf_freelist_free(a->rbuf_freelist);
1822 #endif
1823
1824         OPENSSL_free(a);
1825         }
1826
1827 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1828         {
1829         ctx->default_passwd_callback=cb;
1830         }
1831
1832 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1833         {
1834         ctx->default_passwd_callback_userdata=u;
1835         }
1836
1837 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1838         {
1839         ctx->app_verify_callback=cb;
1840         ctx->app_verify_arg=arg;
1841         }
1842
1843 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1844         {
1845         ctx->verify_mode=mode;
1846         ctx->default_verify_callback=cb;
1847         }
1848
1849 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1850         {
1851         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1852         }
1853
1854 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1855         {
1856         CERT_PKEY *cpk;
1857         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1858         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1859         int rsa_tmp_export,dh_tmp_export,kl;
1860         unsigned long mask_k,mask_a,emask_k,emask_a;
1861         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1862 #ifndef OPENSSL_NO_ECDH
1863         int have_ecdh_tmp;
1864 #endif
1865         X509 *x = NULL;
1866         EVP_PKEY *ecc_pkey = NULL;
1867         int signature_nid = 0, pk_nid = 0, md_nid = 0;
1868
1869         if (c == NULL) return;
1870
1871         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1872
1873 #ifndef OPENSSL_NO_RSA
1874         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1875         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1876                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1877 #else
1878         rsa_tmp=rsa_tmp_export=0;
1879 #endif
1880 #ifndef OPENSSL_NO_DH
1881         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1882         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1883                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1884 #else
1885         dh_tmp=dh_tmp_export=0;
1886 #endif
1887
1888 #ifndef OPENSSL_NO_ECDH
1889         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1890 #endif
1891         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1892         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1893         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1894         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1895         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1896         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1897         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1898         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1899         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1900         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1901         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1902 /* FIX THIS EAY EAY EAY */
1903         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1904         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1905         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1906         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1907         mask_k=0;
1908         mask_a=0;
1909         emask_k=0;
1910         emask_a=0;
1911
1912
1913
1914 #ifdef CIPHER_DEBUG
1915         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1916                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1917                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1918 #endif
1919
1920         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1921         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1922                 mask_k |= SSL_kGOST;
1923                 mask_a |= SSL_aGOST01;
1924         }
1925         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1926         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1927                 mask_k |= SSL_kGOST;
1928                 mask_a |= SSL_aGOST94;
1929         }
1930
1931         if (rsa_enc || (rsa_tmp && rsa_sign))
1932                 mask_k|=SSL_kRSA;
1933         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1934                 emask_k|=SSL_kRSA;
1935
1936 #if 0
1937         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1938         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1939                 (rsa_enc || rsa_sign || dsa_sign))
1940                 mask_k|=SSL_kEDH;
1941         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1942                 (rsa_enc || rsa_sign || dsa_sign))
1943                 emask_k|=SSL_kEDH;
1944 #endif
1945
1946         if (dh_tmp_export)
1947                 emask_k|=SSL_kEDH;
1948
1949         if (dh_tmp)
1950                 mask_k|=SSL_kEDH;
1951
1952         if (dh_rsa) mask_k|=SSL_kDHr;
1953         if (dh_rsa_export) emask_k|=SSL_kDHr;
1954
1955         if (dh_dsa) mask_k|=SSL_kDHd;
1956         if (dh_dsa_export) emask_k|=SSL_kDHd;
1957
1958         if (rsa_enc || rsa_sign)
1959                 {
1960                 mask_a|=SSL_aRSA;
1961                 emask_a|=SSL_aRSA;
1962                 }
1963
1964         if (dsa_sign)
1965                 {
1966                 mask_a|=SSL_aDSS;
1967                 emask_a|=SSL_aDSS;
1968                 }
1969
1970         mask_a|=SSL_aNULL;
1971         emask_a|=SSL_aNULL;
1972
1973 #ifndef OPENSSL_NO_KRB5
1974         mask_k|=SSL_kKRB5;
1975         mask_a|=SSL_aKRB5;
1976         emask_k|=SSL_kKRB5;
1977         emask_a|=SSL_aKRB5;
1978 #endif
1979
1980         /* An ECC certificate may be usable for ECDH and/or
1981          * ECDSA cipher suites depending on the key usage extension.
1982          */
1983         if (have_ecc_cert)
1984                 {
1985                 /* This call populates extension flags (ex_flags) */
1986                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1987                 X509_check_purpose(x, -1, 0);
1988                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1989                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1990                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1991                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1992                 ecc_pkey = X509_get_pubkey(x);
1993                 ecc_pkey_size = (ecc_pkey != NULL) ?
1994                     EVP_PKEY_bits(ecc_pkey) : 0;
1995                 EVP_PKEY_free(ecc_pkey);
1996                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1997                         {
1998                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1999                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2000                         }
2001 #ifndef OPENSSL_NO_ECDH
2002                 if (ecdh_ok)
2003                         {
2004
2005                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2006                                 {
2007                                 mask_k|=SSL_kECDHr;
2008                                 mask_a|=SSL_aECDH;
2009                                 if (ecc_pkey_size <= 163)
2010                                         {
2011                                         emask_k|=SSL_kECDHr;
2012                                         emask_a|=SSL_aECDH;
2013                                         }
2014                                 }
2015
2016                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2017                                 {
2018                                 mask_k|=SSL_kECDHe;
2019                                 mask_a|=SSL_aECDH;
2020                                 if (ecc_pkey_size <= 163)
2021                                         {
2022                                         emask_k|=SSL_kECDHe;
2023                                         emask_a|=SSL_aECDH;
2024                                         }
2025                                 }
2026                         }
2027 #endif
2028 #ifndef OPENSSL_NO_ECDSA
2029                 if (ecdsa_ok)
2030                         {
2031                         mask_a|=SSL_aECDSA;
2032                         emask_a|=SSL_aECDSA;
2033                         }
2034 #endif
2035                 }
2036
2037 #ifndef OPENSSL_NO_ECDH
2038         if (have_ecdh_tmp)
2039                 {
2040                 mask_k|=SSL_kEECDH;
2041                 emask_k|=SSL_kEECDH;
2042                 }
2043 #endif
2044
2045 #ifndef OPENSSL_NO_PSK
2046         mask_k |= SSL_kPSK;
2047         mask_a |= SSL_aPSK;
2048         emask_k |= SSL_kPSK;
2049         emask_a |= SSL_aPSK;
2050 #endif
2051
2052         c->mask_k=mask_k;
2053         c->mask_a=mask_a;
2054         c->export_mask_k=emask_k;
2055         c->export_mask_a=emask_a;
2056         c->valid=1;
2057         }
2058
2059 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2060 #define ku_reject(x, usage) \
2061         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2062
2063 #ifndef OPENSSL_NO_EC
2064
2065 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2066         {
2067         unsigned long alg_k, alg_a;
2068         EVP_PKEY *pkey = NULL;
2069         int keysize = 0;
2070         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2071         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2072
2073         alg_k = cs->algorithm_mkey;
2074         alg_a = cs->algorithm_auth;
2075
2076         if (SSL_C_IS_EXPORT(cs))
2077                 {
2078                 /* ECDH key length in export ciphers must be <= 163 bits */
2079                 pkey = X509_get_pubkey(x);
2080                 if (pkey == NULL) return 0;
2081                 keysize = EVP_PKEY_bits(pkey);
2082                 EVP_PKEY_free(pkey);
2083                 if (keysize > 163) return 0;
2084                 }
2085
2086         /* This call populates the ex_flags field correctly */
2087         X509_check_purpose(x, -1, 0);
2088         if ((x->sig_alg) && (x->sig_alg->algorithm))
2089                 {
2090                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2091                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2092                 }
2093         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2094                 {
2095                 /* key usage, if present, must allow key agreement */
2096                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2097                         {
2098                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2099                         return 0;
2100                         }
2101                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2102                         {
2103                         /* signature alg must be ECDSA */
2104                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2105                                 {
2106                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2107                                 return 0;
2108                                 }
2109                         }
2110                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2111                         {
2112                         /* signature alg must be RSA */
2113
2114                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2115                                 {
2116                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2117                                 return 0;
2118                                 }
2119                         }
2120                 }
2121         if (alg_a & SSL_aECDSA)
2122                 {
2123                 /* key usage, if present, must allow signing */
2124                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2125                         {
2126                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2127                         return 0;
2128                         }
2129                 }
2130
2131         return 1;  /* all checks are ok */
2132         }
2133
2134 #endif
2135
2136 /* THIS NEEDS CLEANING UP */
2137 X509 *ssl_get_server_send_cert(SSL *s)
2138         {
2139         unsigned long alg_k,alg_a;
2140         CERT *c;
2141         int i;
2142
2143         c=s->cert;
2144         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2145
2146         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2147         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2148
2149         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2150                 {
2151                 /* we don't need to look at SSL_kEECDH
2152                  * since no certificate is needed for
2153                  * anon ECDH and for authenticated
2154                  * EECDH, the check for the auth
2155                  * algorithm will set i correctly
2156                  * NOTE: For ECDH-RSA, we need an ECC
2157                  * not an RSA cert but for EECDH-RSA
2158                  * we need an RSA cert. Placing the
2159                  * checks for SSL_kECDH before RSA
2160                  * checks ensures the correct cert is chosen.
2161                  */
2162                 i=SSL_PKEY_ECC;
2163                 }
2164         else if (alg_a & SSL_aECDSA)
2165                 {
2166                 i=SSL_PKEY_ECC;
2167                 }
2168         else if (alg_k & SSL_kDHr)
2169                 i=SSL_PKEY_DH_RSA;
2170         else if (alg_k & SSL_kDHd)
2171                 i=SSL_PKEY_DH_DSA;
2172         else if (alg_a & SSL_aDSS)
2173                 i=SSL_PKEY_DSA_SIGN;
2174         else if (alg_a & SSL_aRSA)
2175                 {
2176                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2177                         i=SSL_PKEY_RSA_SIGN;
2178                 else
2179                         i=SSL_PKEY_RSA_ENC;
2180                 }
2181         else if (alg_a & SSL_aKRB5)
2182                 {
2183                 /* VRS something else here? */
2184                 return(NULL);
2185                 }
2186         else if (alg_a & SSL_aGOST94)
2187                 i=SSL_PKEY_GOST94;
2188         else if (alg_a & SSL_aGOST01)
2189                 i=SSL_PKEY_GOST01;
2190         else /* if (alg_a & SSL_aNULL) */
2191                 {
2192                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2193                 return(NULL);
2194                 }
2195         if (c->pkeys[i].x509 == NULL) return(NULL);
2196
2197         return(c->pkeys[i].x509);
2198         }
2199
2200 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2201         {
2202         unsigned long alg_a;
2203         CERT *c;
2204         int idx = -1;
2205
2206         alg_a = cipher->algorithm_auth;
2207         c=s->cert;
2208
2209         if ((alg_a & SSL_aDSS) &&
2210                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2211                 idx = SSL_PKEY_DSA_SIGN;
2212         else if (alg_a & SSL_aRSA)
2213                 {
2214                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2215                         idx = SSL_PKEY_RSA_SIGN;
2216                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2217                         idx = SSL_PKEY_RSA_ENC;
2218                 }
2219         else if ((alg_a & SSL_aECDSA) &&
2220                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2221                 idx = SSL_PKEY_ECC;
2222         if (idx == -1)
2223                 {
2224                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2225                 return(NULL);
2226                 }
2227         if (pmd)
2228                 *pmd = c->pkeys[idx].digest;
2229         return c->pkeys[idx].privatekey;
2230         }
2231
2232 void ssl_update_cache(SSL *s,int mode)
2233         {
2234         int i;
2235
2236         /* If the session_id_length is 0, we are not supposed to cache it,
2237          * and it would be rather hard to do anyway :-) */
2238         if (s->session->session_id_length == 0) return;
2239
2240         i=s->session_ctx->session_cache_mode;
2241         if ((i & mode) && (!s->hit)
2242                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2243                     || SSL_CTX_add_session(s->session_ctx,s->session))
2244                 && (s->session_ctx->new_session_cb != NULL))
2245                 {
2246                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2247                 if (!s->session_ctx->new_session_cb(s,s->session))
2248                         SSL_SESSION_free(s->session);
2249                 }
2250
2251         /* auto flush every 255 connections */
2252         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2253                 ((i & mode) == mode))
2254                 {
2255                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2256                         ?s->session_ctx->stats.sess_connect_good
2257                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2258                         {
2259                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2260                         }
2261                 }
2262         }
2263
2264 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2265         {
2266         return(s->method);
2267         }
2268
2269 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2270         {
2271         int conn= -1;
2272         int ret=1;
2273
2274         if (s->method != meth)
2275                 {
2276                 if (s->handshake_func != NULL)
2277                         conn=(s->handshake_func == s->method->ssl_connect);
2278
2279                 if (s->method->version == meth->version)
2280                         s->method=meth;
2281                 else
2282                         {
2283                         s->method->ssl_free(s);
2284                         s->method=meth;
2285                         ret=s->method->ssl_new(s);
2286                         }
2287
2288                 if (conn == 1)
2289                         s->handshake_func=meth->ssl_connect;
2290                 else if (conn == 0)
2291                         s->handshake_func=meth->ssl_accept;
2292                 }
2293         return(ret);
2294         }
2295
2296 int SSL_get_error(const SSL *s,int i)
2297         {
2298         int reason;
2299         unsigned long l;
2300         BIO *bio;
2301
2302         if (i > 0) return(SSL_ERROR_NONE);
2303
2304         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2305          * etc, where we do encode the error */
2306         if ((l=ERR_peek_error()) != 0)
2307                 {
2308                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2309                         return(SSL_ERROR_SYSCALL);
2310                 else
2311                         return(SSL_ERROR_SSL);
2312                 }
2313
2314         if ((i < 0) && SSL_want_read(s))
2315                 {
2316                 bio=SSL_get_rbio(s);
2317                 if (BIO_should_read(bio))
2318                         return(SSL_ERROR_WANT_READ);
2319                 else if (BIO_should_write(bio))
2320                         /* This one doesn't make too much sense ... We never try
2321                          * to write to the rbio, and an application program where
2322                          * rbio and wbio are separate couldn't even know what it
2323                          * should wait for.
2324                          * However if we ever set s->rwstate incorrectly
2325                          * (so that we have SSL_want_read(s) instead of
2326                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2327                          * this test works around that bug; so it might be safer
2328                          * to keep it. */
2329                         return(SSL_ERROR_WANT_WRITE);
2330                 else if (BIO_should_io_special(bio))
2331                         {
2332                         reason=BIO_get_retry_reason(bio);
2333                         if (reason == BIO_RR_CONNECT)
2334                                 return(SSL_ERROR_WANT_CONNECT);
2335                         else if (reason == BIO_RR_ACCEPT)
2336                                 return(SSL_ERROR_WANT_ACCEPT);
2337                         else
2338                                 return(SSL_ERROR_SYSCALL); /* unknown */
2339                         }
2340                 }
2341
2342         if ((i < 0) && SSL_want_write(s))
2343                 {
2344                 bio=SSL_get_wbio(s);
2345                 if (BIO_should_write(bio))
2346                         return(SSL_ERROR_WANT_WRITE);
2347                 else if (BIO_should_read(bio))
2348                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2349                         return(SSL_ERROR_WANT_READ);
2350                 else if (BIO_should_io_special(bio))
2351                         {
2352                         reason=BIO_get_retry_reason(bio);
2353                         if (reason == BIO_RR_CONNECT)
2354                                 return(SSL_ERROR_WANT_CONNECT);
2355                         else if (reason == BIO_RR_ACCEPT)
2356                                 return(SSL_ERROR_WANT_ACCEPT);
2357                         else
2358                                 return(SSL_ERROR_SYSCALL);
2359                         }
2360                 }
2361         if ((i < 0) && SSL_want_x509_lookup(s))
2362                 {
2363                 return(SSL_ERROR_WANT_X509_LOOKUP);
2364                 }
2365
2366         if (i == 0)
2367                 {
2368                 if (s->version == SSL2_VERSION)
2369                         {
2370                         /* assume it is the socket being closed */
2371                         return(SSL_ERROR_ZERO_RETURN);
2372                         }
2373                 else
2374                         {
2375                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2376                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2377                                 return(SSL_ERROR_ZERO_RETURN);
2378                         }
2379                 }
2380         return(SSL_ERROR_SYSCALL);
2381         }
2382
2383 int SSL_do_handshake(SSL *s)
2384         {
2385         int ret=1;
2386
2387         if (s->handshake_func == NULL)
2388                 {
2389                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2390                 return(-1);
2391                 }
2392
2393         s->method->ssl_renegotiate_check(s);
2394
2395         if (SSL_in_init(s) || SSL_in_before(s))
2396                 {
2397                 ret=s->handshake_func(s);
2398                 }
2399         return(ret);
2400         }
2401
2402 /* For the next 2 functions, SSL_clear() sets shutdown and so
2403  * one of these calls will reset it */
2404 void SSL_set_accept_state(SSL *s)
2405         {
2406         s->server=1;
2407         s->shutdown=0;
2408         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2409         s->handshake_func=s->method->ssl_accept;
2410         /* clear the current cipher */
2411         ssl_clear_cipher_ctx(s);
2412         ssl_clear_hash_ctx(&s->read_hash);
2413         ssl_clear_hash_ctx(&s->write_hash);
2414         }
2415
2416 void SSL_set_connect_state(SSL *s)
2417         {
2418         s->server=0;
2419         s->shutdown=0;
2420         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2421         s->handshake_func=s->method->ssl_connect;
2422         /* clear the current cipher */
2423         ssl_clear_cipher_ctx(s);
2424         ssl_clear_hash_ctx(&s->read_hash);
2425         ssl_clear_hash_ctx(&s->write_hash);
2426         }
2427
2428 int ssl_undefined_function(SSL *s)
2429         {
2430         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2431         return(0);
2432         }
2433
2434 int ssl_undefined_void_function(void)
2435         {
2436         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2437         return(0);
2438         }
2439
2440 int ssl_undefined_const_function(const SSL *s)
2441         {
2442         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2443         return(0);
2444         }
2445
2446 SSL_METHOD *ssl_bad_method(int ver)
2447         {
2448         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2449         return(NULL);
2450         }
2451
2452 const char *SSL_get_version(const SSL *s)
2453         {
2454         if (s->version == TLS1_2_VERSION)
2455                 return("TLSv1.2");
2456         else if (s->version == TLS1_1_VERSION)
2457                 return("TLSv1.1");
2458         if (s->version == TLS1_VERSION)
2459                 return("TLSv1");
2460         else if (s->version == SSL3_VERSION)
2461                 return("SSLv3");
2462         else if (s->version == SSL2_VERSION)
2463                 return("SSLv2");
2464         else
2465                 return("unknown");
2466         }
2467
2468 SSL *SSL_dup(SSL *s)
2469         {
2470         STACK_OF(X509_NAME) *sk;
2471         X509_NAME *xn;
2472         SSL *ret;
2473         int i;
2474
2475         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2476             return(NULL);
2477
2478         ret->version = s->version;
2479         ret->type = s->type;
2480         ret->method = s->method;
2481
2482         if (s->session != NULL)
2483                 {
2484                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2485                 SSL_copy_session_id(ret,s);
2486                 }
2487         else
2488                 {
2489                 /* No session has been established yet, so we have to expect
2490                  * that s->cert or ret->cert will be changed later --
2491                  * they should not both point to the same object,
2492                  * and thus we can't use SSL_copy_session_id. */
2493
2494                 ret->method->ssl_free(ret);
2495                 ret->method = s->method;
2496                 ret->method->ssl_new(ret);
2497
2498                 if (s->cert != NULL)
2499                         {
2500                         if (ret->cert != NULL)
2501                                 {
2502                                 ssl_cert_free(ret->cert);
2503                                 }
2504                         ret->cert = ssl_cert_dup(s->cert);
2505                         if (ret->cert == NULL)
2506                                 goto err;
2507                         }
2508
2509                 SSL_set_session_id_context(ret,
2510                         s->sid_ctx, s->sid_ctx_length);
2511                 }
2512
2513         ret->options=s->options;
2514         ret->mode=s->mode;
2515         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2516         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2517         ret->msg_callback = s->msg_callback;
2518         ret->msg_callback_arg = s->msg_callback_arg;
2519         SSL_set_verify(ret,SSL_get_verify_mode(s),
2520                 SSL_get_verify_callback(s));
2521         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2522         ret->generate_session_id = s->generate_session_id;
2523
2524         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2525
2526         ret->debug=s->debug;
2527
2528         /* copy app data, a little dangerous perhaps */
2529         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2530                 goto err;
2531
2532         /* setup rbio, and wbio */
2533         if (s->rbio != NULL)
2534                 {
2535                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2536                         goto err;
2537                 }
2538         if (s->wbio != NULL)
2539                 {
2540                 if (s->wbio != s->rbio)
2541                         {
2542                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2543                                 goto err;
2544                         }
2545                 else
2546                         ret->wbio=ret->rbio;
2547                 }
2548         ret->rwstate = s->rwstate;
2549         ret->in_handshake = s->in_handshake;
2550         ret->handshake_func = s->handshake_func;
2551         ret->server = s->server;
2552         ret->renegotiate = s->renegotiate;
2553         ret->new_session = s->new_session;
2554         ret->quiet_shutdown = s->quiet_shutdown;
2555         ret->shutdown=s->shutdown;
2556         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2557         ret->rstate=s->rstate;
2558         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2559         ret->hit=s->hit;
2560
2561         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2562
2563         /* dup the cipher_list and cipher_list_by_id stacks */
2564         if (s->cipher_list != NULL)
2565                 {
2566                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2567                         goto err;
2568                 }
2569         if (s->cipher_list_by_id != NULL)
2570                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2571                         == NULL)
2572                         goto err;
2573
2574         /* Dup the client_CA list */
2575         if (s->client_CA != NULL)
2576                 {
2577                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2578                 ret->client_CA=sk;
2579                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2580                         {
2581                         xn=sk_X509_NAME_value(sk,i);
2582                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2583                                 {
2584                                 X509_NAME_free(xn);
2585                                 goto err;
2586                                 }
2587                         }
2588                 }
2589
2590         if (0)
2591                 {
2592 err:
2593                 if (ret != NULL) SSL_free(ret);
2594                 ret=NULL;
2595                 }
2596         return(ret);
2597         }
2598
2599 void ssl_clear_cipher_ctx(SSL *s)
2600         {
2601         if (s->enc_read_ctx != NULL)
2602                 {
2603                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2604                 OPENSSL_free(s->enc_read_ctx);
2605                 s->enc_read_ctx=NULL;
2606                 }
2607         if (s->enc_write_ctx != NULL)
2608                 {
2609                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2610                 OPENSSL_free(s->enc_write_ctx);
2611                 s->enc_write_ctx=NULL;
2612                 }
2613 #ifndef OPENSSL_NO_COMP
2614         if (s->expand != NULL)
2615                 {
2616                 COMP_CTX_free(s->expand);
2617                 s->expand=NULL;
2618                 }
2619         if (s->compress != NULL)
2620                 {
2621                 COMP_CTX_free(s->compress);
2622                 s->compress=NULL;
2623                 }
2624 #endif
2625         }
2626
2627 /* Fix this function so that it takes an optional type parameter */
2628 X509 *SSL_get_certificate(const SSL *s)
2629         {
2630         if (s->cert != NULL)
2631                 return(s->cert->key->x509);
2632         else
2633                 return(NULL);
2634         }
2635
2636 /* Fix this function so that it takes an optional type parameter */
2637 EVP_PKEY *SSL_get_privatekey(SSL *s)
2638         {
2639         if (s->cert != NULL)
2640                 return(s->cert->key->privatekey);
2641         else
2642                 return(NULL);
2643         }
2644
2645 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2646         {
2647         if ((s->session != NULL) && (s->session->cipher != NULL))
2648                 return(s->session->cipher);
2649         return(NULL);
2650         }
2651 #ifdef OPENSSL_NO_COMP
2652 const void *SSL_get_current_compression(SSL *s)
2653         {
2654         return NULL;
2655         }
2656 const void *SSL_get_current_expansion(SSL *s)
2657         {
2658         return NULL;
2659         }
2660 #else
2661
2662 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2663         {
2664         if (s->compress != NULL)
2665                 return(s->compress->meth);
2666         return(NULL);
2667         }
2668
2669 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2670         {
2671         if (s->expand != NULL)
2672                 return(s->expand->meth);
2673         return(NULL);
2674         }
2675 #endif
2676
2677 int ssl_init_wbio_buffer(SSL *s,int push)
2678         {
2679         BIO *bbio;
2680
2681         if (s->bbio == NULL)
2682                 {
2683                 bbio=BIO_new(BIO_f_buffer());
2684                 if (bbio == NULL) return(0);
2685                 s->bbio=bbio;
2686                 }
2687         else
2688                 {
2689                 bbio=s->bbio;
2690                 if (s->bbio == s->wbio)
2691                         s->wbio=BIO_pop(s->wbio);
2692                 }
2693         (void)BIO_reset(bbio);
2694 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2695         if (!BIO_set_read_buffer_size(bbio,1))
2696                 {
2697                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2698                 return(0);
2699                 }
2700         if (push)
2701                 {
2702                 if (s->wbio != bbio)
2703                         s->wbio=BIO_push(bbio,s->wbio);
2704                 }
2705         else
2706                 {
2707                 if (s->wbio == bbio)
2708                         s->wbio=BIO_pop(bbio);
2709                 }
2710         return(1);
2711         }
2712
2713 void ssl_free_wbio_buffer(SSL *s)
2714         {
2715         if (s->bbio == NULL) return;
2716
2717         if (s->bbio == s->wbio)
2718                 {
2719                 /* remove buffering */
2720                 s->wbio=BIO_pop(s->wbio);
2721 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2722                 assert(s->wbio != NULL);
2723 #endif
2724         }
2725         BIO_free(s->bbio);
2726         s->bbio=NULL;
2727         }
2728
2729 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2730         {
2731         ctx->quiet_shutdown=mode;
2732         }
2733
2734 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2735         {
2736         return(ctx->quiet_shutdown);
2737         }
2738
2739 void SSL_set_quiet_shutdown(SSL *s,int mode)
2740         {
2741         s->quiet_shutdown=mode;
2742         }
2743
2744 int SSL_get_quiet_shutdown(const SSL *s)
2745         {
2746         return(s->quiet_shutdown);
2747         }
2748
2749 void SSL_set_shutdown(SSL *s,int mode)
2750         {
2751         s->shutdown=mode;
2752         }
2753
2754 int SSL_get_shutdown(const SSL *s)
2755         {
2756         return(s->shutdown);
2757         }
2758
2759 int SSL_version(const SSL *s)
2760         {
2761         return(s->version);
2762         }
2763
2764 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2765         {
2766         return(ssl->ctx);
2767         }
2768
2769 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2770         {
2771         if (ssl->ctx == ctx)
2772                 return ssl->ctx;
2773 #ifndef OPENSSL_NO_TLSEXT
2774         if (ctx == NULL)
2775                 ctx = ssl->initial_ctx;
2776 #endif
2777         if (ssl->cert != NULL)
2778                 ssl_cert_free(ssl->cert);
2779         ssl->cert = ssl_cert_dup(ctx->cert);
2780         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2781         if (ssl->ctx != NULL)
2782                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2783         ssl->ctx = ctx;
2784         return(ssl->ctx);
2785         }
2786
2787 #ifndef OPENSSL_NO_STDIO
2788 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2789         {
2790         return(X509_STORE_set_default_paths(ctx->cert_store));
2791         }
2792
2793 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2794                 const char *CApath)
2795         {
2796         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2797         }
2798 #endif
2799
2800 void SSL_set_info_callback(SSL *ssl,
2801         void (*cb)(const SSL *ssl,int type,int val))
2802         {
2803         ssl->info_callback=cb;
2804         }
2805
2806 /* One compiler (Diab DCC) doesn't like argument names in returned
2807    function pointer.  */
2808 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2809         {
2810         return ssl->info_callback;
2811         }
2812
2813 int SSL_state(const SSL *ssl)
2814         {
2815         return(ssl->state);
2816         }
2817
2818 void SSL_set_state(SSL *ssl, int state)
2819         {
2820         ssl->state = state;
2821         }
2822
2823 void SSL_set_verify_result(SSL *ssl,long arg)
2824         {
2825         ssl->verify_result=arg;
2826         }
2827
2828 long SSL_get_verify_result(const SSL *ssl)
2829         {
2830         return(ssl->verify_result);
2831         }
2832
2833 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2834                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2835         {
2836         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2837                                 new_func, dup_func, free_func);
2838         }
2839
2840 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2841         {
2842         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2843         }
2844
2845 void *SSL_get_ex_data(const SSL *s,int idx)
2846         {
2847         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2848         }
2849
2850 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2851                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2852         {
2853         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2854                                 new_func, dup_func, free_func);
2855         }
2856
2857 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2858         {
2859         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2860         }
2861
2862 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2863         {
2864         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2865         }
2866
2867 int ssl_ok(SSL *s)
2868         {
2869         return(1);
2870         }
2871
2872 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2873         {
2874         return(ctx->cert_store);
2875         }
2876
2877 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2878         {
2879         if (ctx->cert_store != NULL)
2880                 X509_STORE_free(ctx->cert_store);
2881         ctx->cert_store=store;
2882         }
2883
2884 int SSL_want(const SSL *s)
2885         {
2886         return(s->rwstate);
2887         }
2888
2889 /*!
2890  * \brief Set the callback for generating temporary RSA keys.
2891  * \param ctx the SSL context.
2892  * \param cb the callback
2893  */
2894
2895 #ifndef OPENSSL_NO_RSA
2896 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2897                                                           int is_export,
2898                                                           int keylength))
2899     {
2900     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2901     }
2902
2903 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2904                                                   int is_export,
2905                                                   int keylength))
2906     {
2907     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2908     }
2909 #endif
2910
2911 #ifdef DOXYGEN
2912 /*!
2913  * \brief The RSA temporary key callback function.
2914  * \param ssl the SSL session.
2915  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2916  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2917  * of the required key in bits.
2918  * \return the temporary RSA key.
2919  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2920  */
2921
2922 RSA *cb(SSL *ssl,int is_export,int keylength)
2923     {}
2924 #endif
2925
2926 /*!
2927  * \brief Set the callback for generating temporary DH keys.
2928  * \param ctx the SSL context.
2929  * \param dh the callback
2930  */
2931
2932 #ifndef OPENSSL_NO_DH
2933 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2934                                                         int keylength))
2935         {
2936         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2937         }
2938
2939 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2940                                                 int keylength))
2941         {
2942         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2943         }
2944 #endif
2945
2946 #ifndef OPENSSL_NO_ECDH
2947 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2948                                                                 int keylength))
2949         {
2950         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2951         }
2952
2953 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2954                                                         int keylength))
2955         {
2956         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2957         }
2958 #endif
2959
2960 #ifndef OPENSSL_NO_PSK
2961 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2962         {
2963         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2964                 {
2965                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2966                 return 0;
2967                 }
2968         if (ctx->psk_identity_hint != NULL)
2969                 OPENSSL_free(ctx->psk_identity_hint);
2970         if (identity_hint != NULL)
2971                 {
2972                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2973                 if (ctx->psk_identity_hint == NULL)
2974                         return 0;
2975                 }
2976         else
2977                 ctx->psk_identity_hint = NULL;
2978         return 1;
2979         }
2980
2981 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2982         {
2983         if (s == NULL)
2984                 return 0;
2985
2986         if (s->session == NULL)
2987                 return 1; /* session not created yet, ignored */
2988
2989         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2990                 {
2991                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2992                 return 0;
2993                 }
2994         if (s->session->psk_identity_hint != NULL)
2995                 OPENSSL_free(s->session->psk_identity_hint);
2996         if (identity_hint != NULL)
2997                 {
2998                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2999                 if (s->session->psk_identity_hint == NULL)
3000                         return 0;
3001                 }
3002         else
3003                 s->session->psk_identity_hint = NULL;
3004         return 1;
3005         }
3006
3007 const char *SSL_get_psk_identity_hint(const SSL *s)
3008         {
3009         if (s == NULL || s->session == NULL)
3010                 return NULL;
3011         return(s->session->psk_identity_hint);
3012         }
3013
3014 const char *SSL_get_psk_identity(const SSL *s)
3015         {
3016         if (s == NULL || s->session == NULL)
3017                 return NULL;
3018         return(s->session->psk_identity);
3019         }
3020
3021 void SSL_set_psk_client_callback(SSL *s,
3022     unsigned int (*cb)(SSL *ssl, const char *hint,
3023                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3024                        unsigned int max_psk_len))
3025         {
3026         s->psk_client_callback = cb;
3027         }
3028
3029 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3030     unsigned int (*cb)(SSL *ssl, const char *hint,
3031                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3032                        unsigned int max_psk_len))
3033         {
3034         ctx->psk_client_callback = cb;
3035         }
3036
3037 void SSL_set_psk_server_callback(SSL *s,
3038     unsigned int (*cb)(SSL *ssl, const char *identity,
3039                        unsigned char *psk, unsigned int max_psk_len))
3040         {
3041         s->psk_server_callback = cb;
3042         }
3043
3044 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3045     unsigned int (*cb)(SSL *ssl, const char *identity,
3046                        unsigned char *psk, unsigned int max_psk_len))
3047         {
3048         ctx->psk_server_callback = cb;
3049         }
3050 #endif
3051
3052 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))
3053         {
3054         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3055         }
3056 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))
3057         {
3058         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3059         }
3060
3061 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3062  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3063  * any. If EVP_MD pointer is passed, initializes ctx with this md
3064  * Returns newly allocated ctx;
3065  */
3066
3067 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3068 {
3069         ssl_clear_hash_ctx(hash);
3070         *hash = EVP_MD_CTX_create();
3071         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3072         return *hash;
3073 }
3074 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3075 {
3076
3077         if (*hash) EVP_MD_CTX_destroy(*hash);
3078         *hash=NULL;
3079 }
3080
3081 void SSL_set_debug(SSL *s, int debug)
3082         {
3083         s->debug = debug;
3084         }
3085
3086 int SSL_cache_hit(SSL *s)
3087         {
3088         return s->hit;
3089         }
3090
3091 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3092 #include "../crypto/bio/bss_file.c"
3093 #endif
3094
3095 IMPLEMENT_STACK_OF(SSL_CIPHER)
3096 IMPLEMENT_STACK_OF(SSL_COMP)
3097 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3098                                     ssl_cipher_id);
3099