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         (int (*)(SSL *, unsigned char *, size_t, const char *,
 181                  size_t, const unsigned char *, size_t,
 182                  int use_context)) ssl_undefined_function,
 183         };
 184
 185 int SSL_clear(SSL *s)
 186         {
 187
 188         if (s->method == NULL)
 189                 {
 190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 191                 return(0);
 192                 }
 193
 194         if (ssl_clear_bad_session(s))
 195                 {
 196                 SSL_SESSION_free(s->session);
 197                 s->session=NULL;
 198                 }
 199
 200         s->error=0;
 201         s->hit=0;
 202         s->shutdown=0;
 203
 204 #if 0 /* Disabled since version 1.10 of this file (early return not
 205        * needed because SSL_clear is not called when doing renegotiation) */
 206         /* This is set if we are doing dynamic renegotiation so keep
 207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 208         if (s->renegotiate) return(1);
 209 #else
 210         if (s->renegotiate)
 211                 {
 212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 213                 return 0;
 214                 }
 215 #endif
 216
 217         s->type=0;
 218
 219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 220
 221         s->version=s->method->version;
 222         s->client_version=s->version;
 223         s->rwstate=SSL_NOTHING;
 224         s->rstate=SSL_ST_READ_HEADER;
 225 #if 0
 226         s->read_ahead=s->ctx->read_ahead;
 227 #endif
 228
 229         if (s->init_buf != NULL)
 230                 {
 231                 BUF_MEM_free(s->init_buf);
 232                 s->init_buf=NULL;
 233                 }
 234
 235         ssl_clear_cipher_ctx(s);
 236         ssl_clear_hash_ctx(&s->read_hash);
 237         ssl_clear_hash_ctx(&s->write_hash);
 238
 239         s->first_packet=0;
 240
 241 #if 1
 242         /* Check to see if we were changed into a different method, if
 243          * so, revert back if we are not doing session-id reuse. */
 244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 245                 {
 246                 s->method->ssl_free(s);
 247                 s->method=s->ctx->method;
 248                 if (!s->method->ssl_new(s))
 249                         return(0);
 250                 }
 251         else
 252 #endif
 253                 s->method->ssl_clear(s);
 254         return(1);
 255         }
 256
 257 /** Used to change an SSL_CTXs default SSL method type */
 258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 259         {
 260         STACK_OF(SSL_CIPHER) *sk;
 261
 262         ctx->method=meth;
 263
 264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 265                 &(ctx->cipher_list_by_id),
 266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ctx->cert);
 267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 268                 {
 269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274
 275 SSL *SSL_new(SSL_CTX *ctx)
 276         {
 277         SSL *s;
 278
 279         if (ctx == NULL)
 280                 {
 281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 282                 return(NULL);
 283                 }
 284         if (ctx->method == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 287                 return(NULL);
 288                 }
 289
 290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 291         if (s == NULL) goto err;
 292         memset(s,0,sizeof(SSL));
 293
 294 #ifndef OPENSSL_NO_KRB5
 295         s->kssl_ctx = kssl_ctx_new();
 296 #endif  /* OPENSSL_NO_KRB5 */
 297
 298         s->options=ctx->options;
 299         s->mode=ctx->mode;
 300         s->max_cert_list=ctx->max_cert_list;
 301
 302         if (ctx->cert != NULL)
 303                 {
 304                 /* Earlier library versions used to copy the pointer to
 305                  * the CERT, not its contents; only when setting new
 306                  * parameters for the per-SSL copy, ssl_cert_new would be
 307                  * called (and the direct reference to the per-SSL_CTX
 308                  * settings would be lost, but those still were indirectly
 309                  * accessed for various purposes, and for that reason they
 310                  * used to be known as s->ctx->default_cert).
 311                  * Now we don't look at the SSL_CTX's CERT after having
 312                  * duplicated it once. */
 313
 314                 s->cert = ssl_cert_dup(ctx->cert);
 315                 if (s->cert == NULL)
 316                         goto err;
 317                 }
 318         else
 319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 320
 321         s->read_ahead=ctx->read_ahead;
 322         s->msg_callback=ctx->msg_callback;
 323         s->msg_callback_arg=ctx->msg_callback_arg;
 324         s->verify_mode=ctx->verify_mode;
 325 #if 0
 326         s->verify_depth=ctx->verify_depth;
 327 #endif
 328         s->sid_ctx_length=ctx->sid_ctx_length;
 329         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 330         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 331         s->verify_callback=ctx->default_verify_callback;
 332         s->generate_session_id=ctx->generate_session_id;
 333
 334         s->param = X509_VERIFY_PARAM_new();
 335         if (!s->param)
 336                 goto err;
 337         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 338 #if 0
 339         s->purpose = ctx->purpose;
 340         s->trust = ctx->trust;
 341 #endif
 342         s->quiet_shutdown=ctx->quiet_shutdown;
 343         s->max_send_fragment = ctx->max_send_fragment;
 344
 345         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 346         s->ctx=ctx;
 347 #ifndef OPENSSL_NO_TLSEXT
 348         s->tlsext_debug_cb = 0;
 349         s->tlsext_debug_arg = NULL;
 350         s->tlsext_ticket_expected = 0;
 351         s->tlsext_status_type = -1;
 352         s->tlsext_status_expected = 0;
 353         s->tlsext_ocsp_ids = NULL;
 354         s->tlsext_ocsp_exts = NULL;
 355         s->tlsext_ocsp_resp = NULL;
 356         s->tlsext_ocsp_resplen = -1;
 357         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 358         s->initial_ctx=ctx;
 359 #ifndef OPENSSL_NO_EC
 360         if (ctx->tlsext_ecpointformatlist)
 361                 {
 362                 s->tlsext_ecpointformatlist =
 363                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 364                                         ctx->tlsext_ecpointformatlist_length);
 365                 if (!s->tlsext_ecpointformatlist)
 366                         goto err;
 367                 s->tlsext_ecpointformatlist_length =
 368                                         ctx->tlsext_ecpointformatlist_length;
 369                 }
 370         if (ctx->tlsext_ellipticcurvelist)
 371                 {
 372                 s->tlsext_ellipticcurvelist =
 373                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 374                                         ctx->tlsext_ellipticcurvelist_length);
 375                 if (!s->tlsext_ellipticcurvelist)
 376                         goto err;
 377                 s->tlsext_ellipticcurvelist_length =
 378                                         ctx->tlsext_ellipticcurvelist_length;
 379                 }
 380 #endif
 381 # ifndef OPENSSL_NO_NEXTPROTONEG
 382         s->next_proto_negotiated = NULL;
 383 # endif
 384
 385         if (s->ctx->alpn_client_proto_list)
 386                 {
 387                 s->alpn_client_proto_list =
 388                         OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
 389                 if (s->alpn_client_proto_list == NULL)
 390                         goto err;
 391                 memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
 392                        s->ctx->alpn_client_proto_list_len);
 393                 s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
 394                 }
 395 #endif
 396
 397         s->verify_result=X509_V_OK;
 398
 399         s->method=ctx->method;
 400
 401         if (!s->method->ssl_new(s))
 402                 goto err;
 403
 404         s->references=1;
 405         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 406
 407         SSL_clear(s);
 408
 409         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 410
 411 #ifndef OPENSSL_NO_PSK
 412         s->psk_client_callback=ctx->psk_client_callback;
 413         s->psk_server_callback=ctx->psk_server_callback;
 414 #endif
 415
 416         return(s);
 417 err:
 418         if (s != NULL)
 419                 {
 420                 if (s->cert != NULL)
 421                         ssl_cert_free(s->cert);
 422                 if (s->ctx != NULL)
 423                         SSL_CTX_free(s->ctx); /* decrement reference count */
 424                 OPENSSL_free(s);
 425                 }
 426         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 427         return(NULL);
 428         }
 429
 430 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 431                                    unsigned int sid_ctx_len)
 432     {
 433     if(sid_ctx_len > sizeof ctx->sid_ctx)
 434         {
 435         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 436         return 0;
 437         }
 438     ctx->sid_ctx_length=sid_ctx_len;
 439     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 440
 441     return 1;
 442     }
 443
 444 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 445                                unsigned int sid_ctx_len)
 446     {
 447     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 448         {
 449         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 450         return 0;
 451         }
 452     ssl->sid_ctx_length=sid_ctx_len;
 453     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 454
 455     return 1;
 456     }
 457
 458 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 459         {
 460         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 461         ctx->generate_session_id = cb;
 462         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 463         return 1;
 464         }
 465
 466 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 467         {
 468         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 469         ssl->generate_session_id = cb;
 470         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 471         return 1;
 472         }
 473
 474 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 475                                 unsigned int id_len)
 476         {
 477         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 478          * we can "construct" a session to give us the desired check - ie. to
 479          * find if there's a session in the hash table that would conflict with
 480          * any new session built out of this id/id_len and the ssl_version in
 481          * use by this SSL. */
 482         SSL_SESSION r, *p;
 483
 484         if(id_len > sizeof r.session_id)
 485                 return 0;
 486
 487         r.ssl_version = ssl->version;
 488         r.session_id_length = id_len;
 489         memcpy(r.session_id, id, id_len);
 490         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 491          * callback is calling us to check the uniqueness of a shorter ID, it
 492          * must be compared as a padded-out ID because that is what it will be
 493          * converted to when the callback has finished choosing it. */
 494         if((r.ssl_version == SSL2_VERSION) &&
 495                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 496                 {
 497                 memset(r.session_id + id_len, 0,
 498                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 499                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 500                 }
 501
 502         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 503         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 504         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 505         return (p != NULL);
 506         }
 507
 508 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 509         {
 510         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 511         }
 512
 513 int SSL_set_purpose(SSL *s, int purpose)
 514         {
 515         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 516         }
 517
 518 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 519         {
 520         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 521         }
 522
 523 int SSL_set_trust(SSL *s, int trust)
 524         {
 525         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 526         }
 527
 528 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 529         {
 530         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 531         }
 532
 533 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 534         {
 535         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 536         }
 537
 538 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
 539         {
 540         return ctx->param;
 541         }
 542
 543 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
 544         {
 545         return ssl->param;
 546         }
 547
 548 void SSL_certs_clear(SSL *s)
 549         {
 550         ssl_cert_clear_certs(s->cert);
 551         }
 552
 553 void SSL_free(SSL *s)
 554         {
 555         int i;
 556
 557         if(s == NULL)
 558             return;
 559
 560         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 561 #ifdef REF_PRINT
 562         REF_PRINT("SSL",s);
 563 #endif
 564         if (i > 0) return;
 565 #ifdef REF_CHECK
 566         if (i < 0)
 567                 {
 568                 fprintf(stderr,"SSL_free, bad reference count\n");
 569                 abort(); /* ok */
 570                 }
 571 #endif
 572
 573         if (s->param)
 574                 X509_VERIFY_PARAM_free(s->param);
 575
 576         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 577
 578         if (s->bbio != NULL)
 579                 {
 580                 /* If the buffering BIO is in place, pop it off */
 581                 if (s->bbio == s->wbio)
 582                         {
 583                         s->wbio=BIO_pop(s->wbio);
 584                         }
 585                 BIO_free(s->bbio);
 586                 s->bbio=NULL;
 587                 }
 588         if (s->rbio != NULL)
 589                 BIO_free_all(s->rbio);
 590         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 591                 BIO_free_all(s->wbio);
 592
 593         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 594
 595         /* add extra stuff */
 596         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 597         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 598
 599         /* Make the next call work :-) */
 600         if (s->session != NULL)
 601                 {
 602                 ssl_clear_bad_session(s);
 603                 SSL_SESSION_free(s->session);
 604                 }
 605
 606         ssl_clear_cipher_ctx(s);
 607         ssl_clear_hash_ctx(&s->read_hash);
 608         ssl_clear_hash_ctx(&s->write_hash);
 609
 610         if (s->cert != NULL) ssl_cert_free(s->cert);
 611         /* Free up if allocated */
 612
 613 #ifndef OPENSSL_NO_TLSEXT
 614         if (s->tlsext_hostname)
 615                 OPENSSL_free(s->tlsext_hostname);
 616         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 617 #ifndef OPENSSL_NO_EC
 618         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 619         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 620 #endif /* OPENSSL_NO_EC */
 621         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 622         if (s->tlsext_ocsp_exts)
 623                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 624                                                 X509_EXTENSION_free);
 625         if (s->tlsext_ocsp_ids)
 626                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 627         if (s->tlsext_ocsp_resp)
 628                 OPENSSL_free(s->tlsext_ocsp_resp);
 629         if (s->alpn_client_proto_list)
 630                 OPENSSL_free(s->alpn_client_proto_list);
 631 #endif
 632
 633         if (s->client_CA != NULL)
 634                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 635
 636         if (s->method != NULL) s->method->ssl_free(s);
 637
 638         if (s->ctx) SSL_CTX_free(s->ctx);
 639
 640 #ifndef OPENSSL_NO_KRB5
 641         if (s->kssl_ctx != NULL)
 642                 kssl_ctx_free(s->kssl_ctx);
 643 #endif  /* OPENSSL_NO_KRB5 */
 644
 645 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 646         if (s->next_proto_negotiated)
 647                 OPENSSL_free(s->next_proto_negotiated);
 648 #endif
 649
 650         if (s->srtp_profiles)
 651             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 652
 653         OPENSSL_free(s);
 654         }
 655
 656 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 657         {
 658         /* If the output buffering BIO is still in place, remove it
 659          */
 660         if (s->bbio != NULL)
 661                 {
 662                 if (s->wbio == s->bbio)
 663                         {
 664                         s->wbio=s->wbio->next_bio;
 665                         s->bbio->next_bio=NULL;
 666                         }
 667                 }
 668         if ((s->rbio != NULL) && (s->rbio != rbio))
 669                 BIO_free_all(s->rbio);
 670         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 671                 BIO_free_all(s->wbio);
 672         s->rbio=rbio;
 673         s->wbio=wbio;
 674         }
 675
 676 BIO *SSL_get_rbio(const SSL *s)
 677         { return(s->rbio); }
 678
 679 BIO *SSL_get_wbio(const SSL *s)
 680         { return(s->wbio); }
 681
 682 int SSL_get_fd(const SSL *s)
 683         {
 684         return(SSL_get_rfd(s));
 685         }
 686
 687 int SSL_get_rfd(const SSL *s)
 688         {
 689         int ret= -1;
 690         BIO *b,*r;
 691
 692         b=SSL_get_rbio(s);
 693         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 694         if (r != NULL)
 695                 BIO_get_fd(r,&ret);
 696         return(ret);
 697         }
 698
 699 int SSL_get_wfd(const SSL *s)
 700         {
 701         int ret= -1;
 702         BIO *b,*r;
 703
 704         b=SSL_get_wbio(s);
 705         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 706         if (r != NULL)
 707                 BIO_get_fd(r,&ret);
 708         return(ret);
 709         }
 710
 711 #ifndef OPENSSL_NO_SOCK
 712 int SSL_set_fd(SSL *s,int fd)
 713         {
 714         int ret=0;
 715         BIO *bio=NULL;
 716
 717         bio=BIO_new(BIO_s_socket());
 718
 719         if (bio == NULL)
 720                 {
 721                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 722                 goto err;
 723                 }
 724         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 725         SSL_set_bio(s,bio,bio);
 726         ret=1;
 727 err:
 728         return(ret);
 729         }
 730
 731 int SSL_set_wfd(SSL *s,int fd)
 732         {
 733         int ret=0;
 734         BIO *bio=NULL;
 735
 736         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 737                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 738                 {
 739                 bio=BIO_new(BIO_s_socket());
 740
 741                 if (bio == NULL)
 742                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 743                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 744                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 745                 }
 746         else
 747                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 748         ret=1;
 749 err:
 750         return(ret);
 751         }
 752
 753 int SSL_set_rfd(SSL *s,int fd)
 754         {
 755         int ret=0;
 756         BIO *bio=NULL;
 757
 758         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 759                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 760                 {
 761                 bio=BIO_new(BIO_s_socket());
 762
 763                 if (bio == NULL)
 764                         {
 765                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 766                         goto err;
 767                         }
 768                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 769                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 770                 }
 771         else
 772                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 773         ret=1;
 774 err:
 775         return(ret);
 776         }
 777 #endif
 778
 779
 780 /* return length of latest Finished message we sent, copy to 'buf' */
 781 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 782         {
 783         size_t ret = 0;
 784
 785         if (s->s3 != NULL)
 786                 {
 787                 ret = s->s3->tmp.finish_md_len;
 788                 if (count > ret)
 789                         count = ret;
 790                 memcpy(buf, s->s3->tmp.finish_md, count);
 791                 }
 792         return ret;
 793         }
 794
 795 /* return length of latest Finished message we expected, copy to 'buf' */
 796 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 797         {
 798         size_t ret = 0;
 799
 800         if (s->s3 != NULL)
 801                 {
 802                 ret = s->s3->tmp.peer_finish_md_len;
 803                 if (count > ret)
 804                         count = ret;
 805                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 806                 }
 807         return ret;
 808         }
 809
 810
 811 int SSL_get_verify_mode(const SSL *s)
 812         {
 813         return(s->verify_mode);
 814         }
 815
 816 int SSL_get_verify_depth(const SSL *s)
 817         {
 818         return X509_VERIFY_PARAM_get_depth(s->param);
 819         }
 820
 821 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 822         {
 823         return(s->verify_callback);
 824         }
 825
 826 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 827         {
 828         return(ctx->verify_mode);
 829         }
 830
 831 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 832         {
 833         return X509_VERIFY_PARAM_get_depth(ctx->param);
 834         }
 835
 836 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 837         {
 838         return(ctx->default_verify_callback);
 839         }
 840
 841 void SSL_set_verify(SSL *s,int mode,
 842                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 843         {
 844         s->verify_mode=mode;
 845         if (callback != NULL)
 846                 s->verify_callback=callback;
 847         }
 848
 849 void SSL_set_verify_depth(SSL *s,int depth)
 850         {
 851         X509_VERIFY_PARAM_set_depth(s->param, depth);
 852         }
 853
 854 void SSL_set_read_ahead(SSL *s,int yes)
 855         {
 856         s->read_ahead=yes;
 857         }
 858
 859 int SSL_get_read_ahead(const SSL *s)
 860         {
 861         return(s->read_ahead);
 862         }
 863
 864 int SSL_pending(const SSL *s)
 865         {
 866         /* SSL_pending cannot work properly if read-ahead is enabled
 867          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 868          * and it is impossible to fix since SSL_pending cannot report
 869          * errors that may be observed while scanning the new data.
 870          * (Note that SSL_pending() is often used as a boolean value,
 871          * so we'd better not return -1.)
 872          */
 873         return(s->method->ssl_pending(s));
 874         }
 875
 876 X509 *SSL_get_peer_certificate(const SSL *s)
 877         {
 878         X509 *r;
 879
 880         if ((s == NULL) || (s->session == NULL))
 881                 r=NULL;
 882         else
 883                 r=s->session->peer;
 884
 885         if (r == NULL) return(r);
 886
 887         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 888
 889         return(r);
 890         }
 891
 892 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 893         {
 894         STACK_OF(X509) *r;
 895
 896         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 897                 r=NULL;
 898         else
 899                 r=s->session->sess_cert->cert_chain;
 900
 901         /* If we are a client, cert_chain includes the peer's own
 902          * certificate; if we are a server, it does not. */
 903
 904         return(r);
 905         }
 906
 907 /* Now in theory, since the calling process own 't' it should be safe to
 908  * modify.  We need to be able to read f without being hassled */
 909 void SSL_copy_session_id(SSL *t,const SSL *f)
 910         {
 911         CERT *tmp;
 912
 913         /* Do we need to to SSL locking? */
 914         SSL_set_session(t,SSL_get_session(f));
 915
 916         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 917          * vice-versa */
 918         if (t->method != f->method)
 919                 {
 920                 t->method->ssl_free(t); /* cleanup current */
 921                 t->method=f->method;    /* change method */
 922                 t->method->ssl_new(t);  /* setup new */
 923                 }
 924
 925         tmp=t->cert;
 926         if (f->cert != NULL)
 927                 {
 928                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 929                 t->cert=f->cert;
 930                 }
 931         else
 932                 t->cert=NULL;
 933         if (tmp != NULL) ssl_cert_free(tmp);
 934         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 935         }
 936
 937 /* Fix this so it checks all the valid key/cert options */
 938 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 939         {
 940         if (    (ctx == NULL) ||
 941                 (ctx->cert == NULL) ||
 942                 (ctx->cert->key->x509 == NULL))
 943                 {
 944                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 945                 return(0);
 946                 }
 947         if      (ctx->cert->key->privatekey == NULL)
 948                 {
 949                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 950                 return(0);
 951                 }
 952         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 953         }
 954
 955 /* Fix this function so that it takes an optional type parameter */
 956 int SSL_check_private_key(const SSL *ssl)
 957         {
 958         if (ssl == NULL)
 959                 {
 960                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 961                 return(0);
 962                 }
 963         if (ssl->cert == NULL)
 964                 {
 965                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 966                 return 0;
 967                 }
 968         if (ssl->cert->key->x509 == NULL)
 969                 {
 970                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 971                 return(0);
 972                 }
 973         if (ssl->cert->key->privatekey == NULL)
 974                 {
 975                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 976                 return(0);
 977                 }
 978         return(X509_check_private_key(ssl->cert->key->x509,
 979                 ssl->cert->key->privatekey));
 980         }
 981
 982 int SSL_accept(SSL *s)
 983         {
 984         if (s->handshake_func == 0)
 985                 /* Not properly initialized yet */
 986                 SSL_set_accept_state(s);
 987
 988         return(s->method->ssl_accept(s));
 989         }
 990
 991 int SSL_connect(SSL *s)
 992         {
 993         if (s->handshake_func == 0)
 994                 /* Not properly initialized yet */
 995                 SSL_set_connect_state(s);
 996
 997         return(s->method->ssl_connect(s));
 998         }
 999
1000 long SSL_get_default_timeout(const SSL *s)
1001         {
1002         return(s->method->get_timeout());
1003         }
1004
1005 int SSL_read(SSL *s,void *buf,int num)
1006         {
1007         if (s->handshake_func == 0)
1008                 {
1009                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
1010                 return -1;
1011                 }
1012
1013         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1014                 {
1015                 s->rwstate=SSL_NOTHING;
1016                 return(0);
1017                 }
1018         return(s->method->ssl_read(s,buf,num));
1019         }
1020
1021 int SSL_peek(SSL *s,void *buf,int num)
1022         {
1023         if (s->handshake_func == 0)
1024                 {
1025                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1026                 return -1;
1027                 }
1028
1029         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1030                 {
1031                 return(0);
1032                 }
1033         return(s->method->ssl_peek(s,buf,num));
1034         }
1035
1036 int SSL_write(SSL *s,const void *buf,int num)
1037         {
1038         if (s->handshake_func == 0)
1039                 {
1040                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1041                 return -1;
1042                 }
1043
1044         if (s->shutdown & SSL_SENT_SHUTDOWN)
1045                 {
1046                 s->rwstate=SSL_NOTHING;
1047                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1048                 return(-1);
1049                 }
1050         return(s->method->ssl_write(s,buf,num));
1051         }
1052
1053 int SSL_shutdown(SSL *s)
1054         {
1055         /* Note that this function behaves differently from what one might
1056          * expect.  Return values are 0 for no success (yet),
1057          * 1 for success; but calling it once is usually not enough,
1058          * even if blocking I/O is used (see ssl3_shutdown).
1059          */
1060
1061         if (s->handshake_func == 0)
1062                 {
1063                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1064                 return -1;
1065                 }
1066
1067         if ((s != NULL) && !SSL_in_init(s))
1068                 return(s->method->ssl_shutdown(s));
1069         else
1070                 return(1);
1071         }
1072
1073 int SSL_renegotiate(SSL *s)
1074         {
1075         if (s->renegotiate == 0)
1076                 s->renegotiate=1;
1077
1078         s->new_session=1;
1079
1080         return(s->method->ssl_renegotiate(s));
1081         }
1082
1083 int SSL_renegotiate_abbreviated(SSL *s)
1084         {
1085         if (s->renegotiate == 0)
1086                 s->renegotiate=1;
1087
1088         s->new_session=0;
1089
1090         return(s->method->ssl_renegotiate(s));
1091         }
1092
1093 int SSL_renegotiate_pending(SSL *s)
1094         {
1095         /* becomes true when negotiation is requested;
1096          * false again once a handshake has finished */
1097         return (s->renegotiate != 0);
1098         }
1099
1100 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1101         {
1102         long l;
1103 #ifndef OPENSSL_NO_DANE
1104         const char *hostname = NULL;
1105 #endif
1106
1107         switch (cmd)
1108                 {
1109         case SSL_CTRL_GET_READ_AHEAD:
1110                 return(s->read_ahead);
1111         case SSL_CTRL_SET_READ_AHEAD:
1112                 l=s->read_ahead;
1113                 s->read_ahead=larg;
1114                 return(l);
1115
1116         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1117                 s->msg_callback_arg = parg;
1118                 return 1;
1119
1120         case SSL_CTRL_OPTIONS:
1121                 return(s->options|=larg);
1122         case SSL_CTRL_CLEAR_OPTIONS:
1123                 return(s->options&=~larg);
1124         case SSL_CTRL_MODE:
1125                 return(s->mode|=larg);
1126         case SSL_CTRL_CLEAR_MODE:
1127                 return(s->mode &=~larg);
1128         case SSL_CTRL_GET_MAX_CERT_LIST:
1129                 return(s->max_cert_list);
1130         case SSL_CTRL_SET_MAX_CERT_LIST:
1131                 l=s->max_cert_list;
1132                 s->max_cert_list=larg;
1133                 return(l);
1134         case SSL_CTRL_SET_MTU:
1135 #ifndef OPENSSL_NO_DTLS1
1136                 if (larg < (long)dtls1_min_mtu())
1137                         return 0;
1138 #endif
1139
1140                 if (SSL_IS_DTLS(s))
1141                         {
1142                         s->d1->mtu = larg;
1143                         return larg;
1144                         }
1145                 return 0;
1146         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1147                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1148                         return 0;
1149                 s->max_send_fragment = larg;
1150                 return 1;
1151         case SSL_CTRL_GET_RI_SUPPORT:
1152                 if (s->s3)
1153                         return s->s3->send_connection_binding;
1154                 else return 0;
1155         case SSL_CTRL_CERT_FLAGS:
1156                 return(s->cert->cert_flags|=larg);
1157         case SSL_CTRL_CLEAR_CERT_FLAGS:
1158                 return(s->cert->cert_flags &=~larg);
1159
1160         case SSL_CTRL_GET_RAW_CIPHERLIST:
1161                 if (parg)
1162                         {
1163                         if (s->cert->ciphers_raw == NULL)
1164                                 return 0;
1165                         *(unsigned char **)parg = s->cert->ciphers_raw;
1166                         return (int)s->cert->ciphers_rawlen;
1167                         }
1168                 else
1169                         return ssl_put_cipher_by_char(s,NULL,NULL);
1170 #ifndef OPENSSL_NO_DANE
1171         case SSL_CTRL_PULL_TLSA_RECORD:
1172                 hostname = parg;
1173                 parg = SSL_get_tlsa_record_byname (parg,larg,s->version<0xF000?1:0);
1174                 /* yes, fall through */
1175         case SSL_CTRL_SET_TLSA_RECORD:
1176                 if (parg!=NULL)
1177                         {
1178                         TLSA_EX_DATA *ex = SSL_get_TLSA_ex_data(s);
1179                         unsigned char *tlsa_rec = parg;
1180                         int tlsa_len = 0;
1181
1182                         if (hostname==NULL)
1183                                 {
1184                                 while (1)
1185                                         {
1186                                         int dlen;
1187
1188                                         memcpy(&dlen,tlsa_rec,sizeof(dlen));
1189                                         tlsa_rec += sizeof(dlen)+dlen;
1190
1191                                         if (dlen==0) break;
1192                                         }
1193                                 if ((tlsa_rec = OPENSSL_malloc(tlsa_len)))
1194                                         memcpy(tlsa_rec,parg,tlsa_len);
1195                                 else
1196                                         {
1197                                         SSLerr(SSL_F_SSL_CTRL,SSL_R_UNINITIALIZED);
1198                                         return 0;
1199                                         }
1200                                 }
1201                         ex->tlsa_record = tlsa_rec;
1202                         }
1203                 return 1;
1204 #endif
1205         default:
1206                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1207                 }
1208         }
1209
1210 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1211         {
1212         switch(cmd)
1213                 {
1214         case SSL_CTRL_SET_MSG_CALLBACK:
1215                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1216                 return 1;
1217
1218         default:
1219                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1220                 }
1221         }
1222
1223 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1224         {
1225         return ctx->sessions;
1226         }
1227
1228 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1229         {
1230         long l;
1231         /* For some cases with ctx == NULL perform syntax checks */
1232         if (ctx == NULL)
1233                 {
1234                 switch (cmd)
1235                         {
1236 #ifndef OPENSSL_NO_EC
1237                 case SSL_CTRL_SET_CURVES_LIST:
1238                         return tls1_set_curves_list(NULL, NULL, parg);
1239 #endif
1240                 case SSL_CTRL_SET_SIGALGS_LIST:
1241                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1242                         return tls1_set_sigalgs_list(NULL, parg, 0);
1243                 default:
1244                         return 0;
1245                         }
1246                 }
1247
1248         switch (cmd)
1249                 {
1250         case SSL_CTRL_GET_READ_AHEAD:
1251                 return(ctx->read_ahead);
1252         case SSL_CTRL_SET_READ_AHEAD:
1253                 l=ctx->read_ahead;
1254                 ctx->read_ahead=larg;
1255                 return(l);
1256
1257         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1258                 ctx->msg_callback_arg = parg;
1259                 return 1;
1260
1261         case SSL_CTRL_GET_MAX_CERT_LIST:
1262                 return(ctx->max_cert_list);
1263         case SSL_CTRL_SET_MAX_CERT_LIST:
1264                 l=ctx->max_cert_list;
1265                 ctx->max_cert_list=larg;
1266                 return(l);
1267
1268         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1269                 l=ctx->session_cache_size;
1270                 ctx->session_cache_size=larg;
1271                 return(l);
1272         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1273                 return(ctx->session_cache_size);
1274         case SSL_CTRL_SET_SESS_CACHE_MODE:
1275                 l=ctx->session_cache_mode;
1276                 ctx->session_cache_mode=larg;
1277                 return(l);
1278         case SSL_CTRL_GET_SESS_CACHE_MODE:
1279                 return(ctx->session_cache_mode);
1280
1281         case SSL_CTRL_SESS_NUMBER:
1282                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1283         case SSL_CTRL_SESS_CONNECT:
1284                 return(ctx->stats.sess_connect);
1285         case SSL_CTRL_SESS_CONNECT_GOOD:
1286                 return(ctx->stats.sess_connect_good);
1287         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1288                 return(ctx->stats.sess_connect_renegotiate);
1289         case SSL_CTRL_SESS_ACCEPT:
1290                 return(ctx->stats.sess_accept);
1291         case SSL_CTRL_SESS_ACCEPT_GOOD:
1292                 return(ctx->stats.sess_accept_good);
1293         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1294                 return(ctx->stats.sess_accept_renegotiate);
1295         case SSL_CTRL_SESS_HIT:
1296                 return(ctx->stats.sess_hit);
1297         case SSL_CTRL_SESS_CB_HIT:
1298                 return(ctx->stats.sess_cb_hit);
1299         case SSL_CTRL_SESS_MISSES:
1300                 return(ctx->stats.sess_miss);
1301         case SSL_CTRL_SESS_TIMEOUTS:
1302                 return(ctx->stats.sess_timeout);
1303         case SSL_CTRL_SESS_CACHE_FULL:
1304                 return(ctx->stats.sess_cache_full);
1305         case SSL_CTRL_OPTIONS:
1306                 return(ctx->options|=larg);
1307         case SSL_CTRL_CLEAR_OPTIONS:
1308                 return(ctx->options&=~larg);
1309         case SSL_CTRL_MODE:
1310                 return(ctx->mode|=larg);
1311         case SSL_CTRL_CLEAR_MODE:
1312                 return(ctx->mode&=~larg);
1313         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1314                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1315                         return 0;
1316                 ctx->max_send_fragment = larg;
1317                 return 1;
1318         case SSL_CTRL_CERT_FLAGS:
1319                 return(ctx->cert->cert_flags|=larg);
1320         case SSL_CTRL_CLEAR_CERT_FLAGS:
1321                 return(ctx->cert->cert_flags &=~larg);
1322         default:
1323                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1324                 }
1325         }
1326
1327 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1328         {
1329         switch(cmd)
1330                 {
1331         case SSL_CTRL_SET_MSG_CALLBACK:
1332                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1333                 return 1;
1334
1335         default:
1336                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1337                 }
1338         }
1339
1340 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1341         {
1342         long l;
1343
1344         l=a->id-b->id;
1345         if (l == 0L)
1346                 return(0);
1347         else
1348                 return((l > 0)?1:-1);
1349         }
1350
1351 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1352                         const SSL_CIPHER * const *bp)
1353         {
1354         long l;
1355
1356         l=(*ap)->id-(*bp)->id;
1357         if (l == 0L)
1358                 return(0);
1359         else
1360                 return((l > 0)?1:-1);
1361         }
1362
1363 /** return a STACK of the ciphers available for the SSL and in order of
1364  * preference */
1365 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1366         {
1367         if (s != NULL)
1368                 {
1369                 if (s->cipher_list != NULL)
1370                         {
1371                         return(s->cipher_list);
1372                         }
1373                 else if ((s->ctx != NULL) &&
1374                         (s->ctx->cipher_list != NULL))
1375                         {
1376                         return(s->ctx->cipher_list);
1377                         }
1378                 }
1379         return(NULL);
1380         }
1381
1382 /** return a STACK of the ciphers available for the SSL and in order of
1383  * algorithm id */
1384 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1385         {
1386         if (s != NULL)
1387                 {
1388                 if (s->cipher_list_by_id != NULL)
1389                         {
1390                         return(s->cipher_list_by_id);
1391                         }
1392                 else if ((s->ctx != NULL) &&
1393                         (s->ctx->cipher_list_by_id != NULL))
1394                         {
1395                         return(s->ctx->cipher_list_by_id);
1396                         }
1397                 }
1398         return(NULL);
1399         }
1400
1401 /** The old interface to get the same thing as SSL_get_ciphers() */
1402 const char *SSL_get_cipher_list(const SSL *s,int n)
1403         {
1404         SSL_CIPHER *c;
1405         STACK_OF(SSL_CIPHER) *sk;
1406
1407         if (s == NULL) return(NULL);
1408         sk=SSL_get_ciphers(s);
1409         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1410                 return(NULL);
1411         c=sk_SSL_CIPHER_value(sk,n);
1412         if (c == NULL) return(NULL);
1413         return(c->name);
1414         }
1415
1416 /** specify the ciphers to be used by default by the SSL_CTX */
1417 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1418         {
1419         STACK_OF(SSL_CIPHER) *sk;
1420
1421         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1422                 &ctx->cipher_list_by_id,str, ctx->cert);
1423         /* ssl_create_cipher_list may return an empty stack if it
1424          * was unable to find a cipher matching the given rule string
1425          * (for example if the rule string specifies a cipher which
1426          * has been disabled). This is not an error as far as
1427          * ssl_create_cipher_list is concerned, and hence
1428          * ctx->cipher_list and ctx->cipher_list_by_id has been
1429          * updated. */
1430         if (sk == NULL)
1431                 return 0;
1432         else if (sk_SSL_CIPHER_num(sk) == 0)
1433                 {
1434                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1435                 return 0;
1436                 }
1437         return 1;
1438         }
1439
1440 /** specify the ciphers to be used by the SSL */
1441 int SSL_set_cipher_list(SSL *s,const char *str)
1442         {
1443         STACK_OF(SSL_CIPHER) *sk;
1444
1445         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1446                 &s->cipher_list_by_id,str, s->cert);
1447         /* see comment in SSL_CTX_set_cipher_list */
1448         if (sk == NULL)
1449                 return 0;
1450         else if (sk_SSL_CIPHER_num(sk) == 0)
1451                 {
1452                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1453                 return 0;
1454                 }
1455         return 1;
1456         }
1457
1458 /* works well for SSLv2, not so good for SSLv3 */
1459 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1460         {
1461         char *p;
1462         STACK_OF(SSL_CIPHER) *sk;
1463         SSL_CIPHER *c;
1464         int i;
1465
1466         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1467                 (len < 2))
1468                 return(NULL);
1469
1470         p=buf;
1471         sk=s->session->ciphers;
1472
1473         if (sk_SSL_CIPHER_num(sk) == 0)
1474                 return NULL;
1475
1476         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1477                 {
1478                 int n;
1479
1480                 c=sk_SSL_CIPHER_value(sk,i);
1481                 n=strlen(c->name);
1482                 if (n+1 > len)
1483                         {
1484                         if (p != buf)
1485                                 --p;
1486                         *p='\0';
1487                         return buf;
1488                         }
1489                 strcpy(p,c->name);
1490                 p+=n;
1491                 *(p++)=':';
1492                 len-=n+1;
1493                 }
1494         p[-1]='\0';
1495         return(buf);
1496         }
1497
1498 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1499                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1500         {
1501         int i,j=0;
1502         SSL_CIPHER *c;
1503         CERT *ct = s->cert;
1504         unsigned char *q;
1505         int no_scsv = s->renegotiate;
1506         /* Set disabled masks for this session */
1507         ssl_set_client_disabled(s);
1508
1509         if (sk == NULL) return(0);
1510         q=p;
1511
1512         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1513                 {
1514                 c=sk_SSL_CIPHER_value(sk,i);
1515                 /* Skip disabled ciphers */
1516                 if (c->algorithm_ssl & ct->mask_ssl ||
1517                         c->algorithm_mkey & ct->mask_k ||
1518                         c->algorithm_auth & ct->mask_a)
1519                         continue;
1520 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1521                 if (c->id == SSL3_CK_SCSV)
1522                         {
1523                         if (no_scsv)
1524                                 continue;
1525                         else
1526                                 no_scsv = 1;
1527                         }
1528 #endif
1529                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1530                 p+=j;
1531                 }
1532         /* If p == q, no ciphers and caller indicates an error. Otherwise
1533          * add SCSV if not renegotiating.
1534          */
1535         if (p != q && !no_scsv)
1536                 {
1537                 static SSL_CIPHER scsv =
1538                         {
1539                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1540                         };
1541                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1542                 p+=j;
1543 #ifdef OPENSSL_RI_DEBUG
1544                 fprintf(stderr, "SCSV sent by client\n");
1545 #endif
1546                 }
1547
1548         return(p-q);
1549         }
1550
1551 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1552                                                STACK_OF(SSL_CIPHER) **skp)
1553         {
1554         const SSL_CIPHER *c;
1555         STACK_OF(SSL_CIPHER) *sk;
1556         int i,n;
1557         if (s->s3)
1558                 s->s3->send_connection_binding = 0;
1559
1560         n=ssl_put_cipher_by_char(s,NULL,NULL);
1561         if ((num%n) != 0)
1562                 {
1563                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1564                 return(NULL);
1565                 }
1566         if ((skp == NULL) || (*skp == NULL))
1567                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1568         else
1569                 {
1570                 sk= *skp;
1571                 sk_SSL_CIPHER_zero(sk);
1572                 }
1573
1574         if (s->cert->ciphers_raw)
1575                 OPENSSL_free(s->cert->ciphers_raw);
1576         s->cert->ciphers_raw = BUF_memdup(p, num);
1577         if (s->cert->ciphers_raw == NULL)
1578                 {
1579                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1580                 goto err;
1581                 }
1582         s->cert->ciphers_rawlen = (size_t)num;
1583
1584         for (i=0; i<num; i+=n)
1585                 {
1586                 /* Check for SCSV */
1587                 if (s->s3 && (n != 3 || !p[0]) &&
1588                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1589                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1590                         {
1591                         /* SCSV fatal if renegotiating */
1592                         if (s->renegotiate)
1593                                 {
1594                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1595                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1596                                 goto err;
1597                                 }
1598                         s->s3->send_connection_binding = 1;
1599                         p += n;
1600 #ifdef OPENSSL_RI_DEBUG
1601                         fprintf(stderr, "SCSV received by server\n");
1602 #endif
1603                         continue;
1604                         }
1605
1606                 c=ssl_get_cipher_by_char(s,p);
1607                 p+=n;
1608                 if (c != NULL)
1609                         {
1610                         if (!sk_SSL_CIPHER_push(sk,c))
1611                                 {
1612                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1613                                 goto err;
1614                                 }
1615                         }
1616                 }
1617
1618         if (skp != NULL)
1619                 *skp=sk;
1620         return(sk);
1621 err:
1622         if ((skp == NULL) || (*skp == NULL))
1623                 sk_SSL_CIPHER_free(sk);
1624         return(NULL);
1625         }
1626
1627
1628 #ifndef OPENSSL_NO_TLSEXT
1629 /** return a servername extension value if provided in Client Hello, or NULL.
1630  * So far, only host_name types are defined (RFC 3546).
1631  */
1632
1633 const char *SSL_get_servername(const SSL *s, const int type)
1634         {
1635         if (type != TLSEXT_NAMETYPE_host_name)
1636                 return NULL;
1637
1638         return s->session && !s->tlsext_hostname ?
1639                 s->session->tlsext_hostname :
1640                 s->tlsext_hostname;
1641         }
1642
1643 int SSL_get_servername_type(const SSL *s)
1644         {
1645         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1646                 return TLSEXT_NAMETYPE_host_name;
1647         return -1;
1648         }
1649
1650 /* SSL_select_next_proto implements the standard protocol selection. It is
1651  * expected that this function is called from the callback set by
1652  * SSL_CTX_set_next_proto_select_cb.
1653  *
1654  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1655  * strings. The length byte itself is not included in the length. A byte
1656  * string of length 0 is invalid. No byte string may be truncated.
1657  *
1658  * The current, but experimental algorithm for selecting the protocol is:
1659  *
1660  * 1) If the server doesn't support NPN then this is indicated to the
1661  * callback. In this case, the client application has to abort the connection
1662  * or have a default application level protocol.
1663  *
1664  * 2) If the server supports NPN, but advertises an empty list then the
1665  * client selects the first protcol in its list, but indicates via the
1666  * API that this fallback case was enacted.
1667  *
1668  * 3) Otherwise, the client finds the first protocol in the server's list
1669  * that it supports and selects this protocol. This is because it's
1670  * assumed that the server has better information about which protocol
1671  * a client should use.
1672  *
1673  * 4) If the client doesn't support any of the server's advertised
1674  * protocols, then this is treated the same as case 2.
1675  *
1676  * It returns either
1677  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1678  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1679  */
1680 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsigned char *server, unsigned int server_len, const unsigned char *client, unsigned int client_len)
1681         {
1682         unsigned int i, j;
1683         const unsigned char *result;
1684         int status = OPENSSL_NPN_UNSUPPORTED;
1685
1686         /* For each protocol in server preference order, see if we support it. */
1687         for (i = 0; i < server_len; )
1688                 {
1689                 for (j = 0; j < client_len; )
1690                         {
1691                         if (server[i] == client[j] &&
1692                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1693                                 {
1694                                 /* We found a match */
1695                                 result = &server[i];
1696                                 status = OPENSSL_NPN_NEGOTIATED;
1697                                 goto found;
1698                                 }
1699                         j += client[j];
1700                         j++;
1701                         }
1702                 i += server[i];
1703                 i++;
1704                 }
1705
1706         /* There's no overlap between our protocols and the server's list. */
1707         result = client;
1708         status = OPENSSL_NPN_NO_OVERLAP;
1709
1710         found:
1711         *out = (unsigned char *) result + 1;
1712         *outlen = result[0];
1713         return status;
1714         }
1715
1716 # ifndef OPENSSL_NO_NEXTPROTONEG
1717 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1718  * requested protocol for this connection and returns 0. If the client didn't
1719  * request any protocol, then *data is set to NULL.
1720  *
1721  * Note that the client can request any protocol it chooses. The value returned
1722  * from this function need not be a member of the list of supported protocols
1723  * provided by the callback.
1724  */
1725 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1726         {
1727         *data = s->next_proto_negotiated;
1728         if (!*data) {
1729                 *len = 0;
1730         } else {
1731                 *len = s->next_proto_negotiated_len;
1732         }
1733 }
1734
1735 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1736  * TLS server needs a list of supported protocols for Next Protocol
1737  * Negotiation. The returned list must be in wire format.  The list is returned
1738  * by setting |out| to point to it and |outlen| to its length. This memory will
1739  * not be modified, but one should assume that the SSL* keeps a reference to
1740  * it.
1741  *
1742  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1743  * such extension will be included in the ServerHello. */
1744 void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
1745         {
1746         ctx->next_protos_advertised_cb = cb;
1747         ctx->next_protos_advertised_cb_arg = arg;
1748         }
1749
1750 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1751  * client needs to select a protocol from the server's provided list. |out|
1752  * must be set to point to the selected protocol (which may be within |in|).
1753  * The length of the protocol name must be written into |outlen|. The server's
1754  * advertised protocols are provided in |in| and |inlen|. The callback can
1755  * assume that |in| is syntactically valid.
1756  *
1757  * The client must select a protocol. It is fatal to the connection if this
1758  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1759  */
1760 void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg), void *arg)
1761         {
1762         ctx->next_proto_select_cb = cb;
1763         ctx->next_proto_select_cb_arg = arg;
1764         }
1765 # endif
1766
1767 int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
1768                                custom_cli_ext_first_cb_fn fn1,
1769                                custom_cli_ext_second_cb_fn fn2, void* arg)
1770         {
1771         size_t i;
1772         custom_cli_ext_record* record;
1773
1774         /* Check for duplicates */
1775         for (i=0; i < ctx->custom_cli_ext_records_count; i++)
1776                 if (ext_type == ctx->custom_cli_ext_records[i].ext_type)
1777                         return 0;
1778
1779         ctx->custom_cli_ext_records = OPENSSL_realloc(ctx->custom_cli_ext_records,
1780                                                       (ctx->custom_cli_ext_records_count + 1) *
1781                                                       sizeof(custom_cli_ext_record));
1782         if (!ctx->custom_cli_ext_records) {
1783                 ctx->custom_cli_ext_records_count = 0;
1784                 return 0;
1785         }
1786         ctx->custom_cli_ext_records_count++;
1787         record = &ctx->custom_cli_ext_records[ctx->custom_cli_ext_records_count - 1];
1788         record->ext_type = ext_type;
1789         record->fn1 = fn1;
1790         record->fn2 = fn2;
1791         record->arg = arg;
1792         return 1;
1793         }
1794
1795 int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
1796                                custom_srv_ext_first_cb_fn fn1,
1797                                custom_srv_ext_second_cb_fn fn2, void* arg)
1798         {
1799         size_t i;
1800         custom_srv_ext_record* record;
1801
1802         /* Check for duplicates */
1803         for (i=0; i < ctx->custom_srv_ext_records_count; i++)
1804                 if (ext_type == ctx->custom_srv_ext_records[i].ext_type)
1805                         return 0;
1806
1807         ctx->custom_srv_ext_records = OPENSSL_realloc(ctx->custom_srv_ext_records,
1808                                                       (ctx->custom_srv_ext_records_count + 1) *
1809                                                       sizeof(custom_srv_ext_record));
1810         if (!ctx->custom_srv_ext_records) {
1811                 ctx->custom_srv_ext_records_count = 0;
1812                 return 0;
1813         }
1814         ctx->custom_srv_ext_records_count++;
1815         record = &ctx->custom_srv_ext_records[ctx->custom_srv_ext_records_count - 1];
1816         record->ext_type = ext_type;
1817         record->fn1 = fn1;
1818         record->fn2 = fn2;
1819         record->arg = arg;
1820         return 1;
1821         }
1822
1823 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
1824  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1825  * length-prefixed strings).
1826  *
1827  * Returns 0 on success. */
1828 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
1829                             unsigned protos_len)
1830         {
1831         if (ctx->alpn_client_proto_list)
1832                 OPENSSL_free(ctx->alpn_client_proto_list);
1833
1834         ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1835         if (!ctx->alpn_client_proto_list)
1836                 return 1;
1837         memcpy(ctx->alpn_client_proto_list, protos, protos_len);
1838         ctx->alpn_client_proto_list_len = protos_len;
1839
1840         return 0;
1841         }
1842
1843 /* SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
1844  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1845  * length-prefixed strings).
1846  *
1847  * Returns 0 on success. */
1848 int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
1849                         unsigned protos_len)
1850         {
1851         if (ssl->alpn_client_proto_list)
1852                 OPENSSL_free(ssl->alpn_client_proto_list);
1853
1854         ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1855         if (!ssl->alpn_client_proto_list)
1856                 return 1;
1857         memcpy(ssl->alpn_client_proto_list, protos, protos_len);
1858         ssl->alpn_client_proto_list_len = protos_len;
1859
1860         return 0;
1861         }
1862
1863 /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
1864  * during ClientHello processing in order to select an ALPN protocol from the
1865  * client's list of offered protocols. */
1866 void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
1867                                 int (*cb) (SSL *ssl,
1868                                            const unsigned char **out,
1869                                            unsigned char *outlen,
1870                                            const unsigned char *in,
1871                                            unsigned int inlen,
1872                                            void *arg),
1873                                 void *arg)
1874         {
1875         ctx->alpn_select_cb = cb;
1876         ctx->alpn_select_cb_arg = arg;
1877         }
1878
1879 /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
1880  * On return it sets |*data| to point to |*len| bytes of protocol name (not
1881  * including the leading length-prefix byte). If the server didn't respond with
1882  * a negotiated protocol then |*len| will be zero. */
1883 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1884                             unsigned *len)
1885         {
1886         *data = NULL;
1887         if (ssl->s3)
1888                 *data = ssl->s3->alpn_selected;
1889         if (*data == NULL)
1890                 *len = 0;
1891         else
1892                 *len = ssl->s3->alpn_selected_len;
1893         }
1894
1895 int SSL_CTX_set_cli_supp_data(SSL_CTX *ctx,
1896                               unsigned short supp_data_type,
1897                               cli_supp_data_first_cb_fn fn1,
1898                               cli_supp_data_second_cb_fn fn2, void* arg)
1899         {
1900         size_t i;
1901         cli_supp_data_record* record;
1902
1903         /* Check for duplicates */
1904         for (i=0; i < ctx->cli_supp_data_records_count; i++)
1905                 if (supp_data_type == ctx->cli_supp_data_records[i].supp_data_type)
1906                         return 0;
1907
1908         ctx->cli_supp_data_records = OPENSSL_realloc(ctx->cli_supp_data_records,
1909           (ctx->cli_supp_data_records_count+1) * sizeof(cli_supp_data_record));
1910         if (!ctx->cli_supp_data_records)
1911                 {
1912                 ctx->cli_supp_data_records_count = 0;
1913                 return 0;
1914                 }
1915         ctx->cli_supp_data_records_count++;
1916         record = &ctx->cli_supp_data_records[ctx->cli_supp_data_records_count - 1];
1917         record->supp_data_type = supp_data_type;
1918         record->fn1 = fn1;
1919         record->fn2 = fn2;
1920         record->arg = arg;
1921         return 1;
1922         }
1923
1924 int SSL_CTX_set_srv_supp_data(SSL_CTX *ctx,
1925                               unsigned short supp_data_type,
1926                               srv_supp_data_first_cb_fn fn1,
1927                               srv_supp_data_second_cb_fn fn2, void* arg)
1928         {
1929         size_t i;
1930         srv_supp_data_record* record;
1931
1932         /* Check for duplicates */
1933         for (i=0; i < ctx->srv_supp_data_records_count; i++)
1934                 if (supp_data_type == ctx->srv_supp_data_records[i].supp_data_type)
1935                         return 0;
1936
1937         ctx->srv_supp_data_records = OPENSSL_realloc(ctx->srv_supp_data_records,
1938           (ctx->srv_supp_data_records_count+1) * sizeof(srv_supp_data_record));
1939         if (!ctx->srv_supp_data_records)
1940                 {
1941                 ctx->srv_supp_data_records_count = 0;
1942                 return 0;
1943                 }
1944         ctx->srv_supp_data_records_count++;
1945         record = &ctx->srv_supp_data_records[ctx->srv_supp_data_records_count - 1];
1946         record->supp_data_type = supp_data_type;
1947         record->fn1 = fn1;
1948         record->fn2 = fn2;
1949         record->arg = arg;
1950
1951         return 1;
1952         }
1953
1954 #endif /* !OPENSSL_NO_TLSEXT */
1955
1956 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1957         const char *label, size_t llen, const unsigned char *p, size_t plen,
1958         int use_context)
1959         {
1960         if (s->version < TLS1_VERSION)
1961                 return -1;
1962
1963         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1964                                                            llen, p, plen,
1965                                                            use_context);
1966         }
1967
1968 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1969         {
1970         unsigned long l;
1971
1972         l=(unsigned long)
1973                 ((unsigned int) a->session_id[0]     )|
1974                 ((unsigned int) a->session_id[1]<< 8L)|
1975                 ((unsigned long)a->session_id[2]<<16L)|
1976                 ((unsigned long)a->session_id[3]<<24L);
1977         return(l);
1978         }
1979
1980 /* NB: If this function (or indeed the hash function which uses a sort of
1981  * coarser function than this one) is changed, ensure
1982  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1983  * able to construct an SSL_SESSION that will collide with any existing session
1984  * with a matching session ID. */
1985 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1986         {
1987         if (a->ssl_version != b->ssl_version)
1988                 return(1);
1989         if (a->session_id_length != b->session_id_length)
1990                 return(1);
1991         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1992         }
1993
1994 /* These wrapper functions should remain rather than redeclaring
1995  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1996  * variable. The reason is that the functions aren't static, they're exposed via
1997  * ssl.h. */
1998 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1999 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
2000
2001 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
2002         {
2003         SSL_CTX *ret=NULL;
2004
2005         if (meth == NULL)
2006                 {
2007                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
2008                 return(NULL);
2009                 }
2010
2011 #ifdef OPENSSL_FIPS
2012         if (FIPS_mode() && (meth->version < TLS1_VERSION))
2013                 {
2014                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
2015                 return NULL;
2016                 }
2017 #endif
2018
2019         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
2020                 {
2021                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
2022                 goto err;
2023                 }
2024         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
2025         if (ret == NULL)
2026                 goto err;
2027
2028         memset(ret,0,sizeof(SSL_CTX));
2029
2030         ret->method=meth;
2031
2032         ret->cert_store=NULL;
2033         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
2034         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
2035         ret->session_cache_head=NULL;
2036         ret->session_cache_tail=NULL;
2037
2038         /* We take the system default */
2039         ret->session_timeout=meth->get_timeout();
2040
2041         ret->new_session_cb=0;
2042         ret->remove_session_cb=0;
2043         ret->get_session_cb=0;
2044         ret->generate_session_id=0;
2045
2046         memset((char *)&ret->stats,0,sizeof(ret->stats));
2047
2048         ret->references=1;
2049         ret->quiet_shutdown=0;
2050
2051 /*      ret->cipher=NULL;*/
2052 /*      ret->s2->challenge=NULL;
2053         ret->master_key=NULL;
2054         ret->key_arg=NULL;
2055         ret->s2->conn_id=NULL; */
2056
2057         ret->info_callback=NULL;
2058
2059         ret->app_verify_callback=0;
2060         ret->app_verify_arg=NULL;
2061
2062         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
2063         ret->read_ahead=0;
2064         ret->msg_callback=0;
2065         ret->msg_callback_arg=NULL;
2066         ret->verify_mode=SSL_VERIFY_NONE;
2067 #if 0
2068         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
2069 #endif
2070         ret->sid_ctx_length=0;
2071         ret->default_verify_callback=NULL;
2072         if ((ret->cert=ssl_cert_new()) == NULL)
2073                 goto err;
2074
2075         ret->default_passwd_callback=0;
2076         ret->default_passwd_callback_userdata=NULL;
2077         ret->client_cert_cb=0;
2078         ret->app_gen_cookie_cb=0;
2079         ret->app_verify_cookie_cb=0;
2080
2081         ret->sessions=lh_SSL_SESSION_new();
2082         if (ret->sessions == NULL) goto err;
2083         ret->cert_store=X509_STORE_new();
2084         if (ret->cert_store == NULL) goto err;
2085
2086         ssl_create_cipher_list(ret->method,
2087                 &ret->cipher_list,&ret->cipher_list_by_id,
2088                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
2089         if (ret->cipher_list == NULL
2090             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
2091                 {
2092                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
2093                 goto err2;
2094                 }
2095
2096         ret->param = X509_VERIFY_PARAM_new();
2097         if (!ret->param)
2098                 goto err;
2099
2100         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
2101                 {
2102                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
2103                 goto err2;
2104                 }
2105         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
2106                 {
2107                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
2108                 goto err2;
2109                 }
2110         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
2111                 {
2112                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
2113                 goto err2;
2114                 }
2115
2116         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
2117                 goto err;
2118
2119         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
2120
2121         ret->extra_certs=NULL;
2122         /* No compression for DTLS */
2123         if (meth->version != DTLS1_VERSION)
2124                 ret->comp_methods=SSL_COMP_get_compression_methods();
2125
2126         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2127
2128 #ifndef OPENSSL_NO_TLSEXT
2129         ret->tlsext_servername_callback = 0;
2130         ret->tlsext_servername_arg = NULL;
2131         /* Setup RFC4507 ticket keys */
2132         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
2133                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
2134                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
2135                 ret->options |= SSL_OP_NO_TICKET;
2136
2137         ret->tlsext_status_cb = 0;
2138         ret->tlsext_status_arg = NULL;
2139
2140 # ifndef OPENSSL_NO_NEXTPROTONEG
2141         ret->next_protos_advertised_cb = 0;
2142         ret->next_proto_select_cb = 0;
2143 # endif
2144 #endif
2145 #ifndef OPENSSL_NO_PSK
2146         ret->psk_identity_hint=NULL;
2147         ret->psk_client_callback=NULL;
2148         ret->psk_server_callback=NULL;
2149 #endif
2150 #ifndef OPENSSL_NO_SRP
2151         SSL_CTX_SRP_CTX_init(ret);
2152 #endif
2153         ret->custom_cli_ext_records = NULL;
2154         ret->custom_cli_ext_records_count = 0;
2155         ret->custom_srv_ext_records = NULL;
2156         ret->custom_srv_ext_records_count = 0;
2157         ret->cli_supp_data_records = NULL;
2158         ret->cli_supp_data_records_count = 0;
2159         ret->srv_supp_data_records = NULL;
2160         ret->srv_supp_data_records_count = 0;
2161 #ifndef OPENSSL_NO_BUF_FREELISTS
2162         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
2163         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2164         if (!ret->rbuf_freelist)
2165                 goto err;
2166         ret->rbuf_freelist->chunklen = 0;
2167         ret->rbuf_freelist->len = 0;
2168         ret->rbuf_freelist->head = NULL;
2169         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2170         if (!ret->wbuf_freelist)
2171                 {
2172                 OPENSSL_free(ret->rbuf_freelist);
2173                 goto err;
2174                 }
2175         ret->wbuf_freelist->chunklen = 0;
2176         ret->wbuf_freelist->len = 0;
2177         ret->wbuf_freelist->head = NULL;
2178 #endif
2179 #ifndef OPENSSL_NO_ENGINE
2180         ret->client_cert_engine = NULL;
2181 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2182 #define eng_strx(x)     #x
2183 #define eng_str(x)      eng_strx(x)
2184         /* Use specific client engine automatically... ignore errors */
2185         {
2186         ENGINE *eng;
2187         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2188         if (!eng)
2189                 {
2190                 ERR_clear_error();
2191                 ENGINE_load_builtin_engines();
2192                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2193                 }
2194         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2195                 ERR_clear_error();
2196         }
2197 #endif
2198 #endif
2199         /* Default is to connect to non-RI servers. When RI is more widely
2200          * deployed might change this.
2201          */
2202         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2203
2204         return(ret);
2205 err:
2206         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2207 err2:
2208         if (ret != NULL) SSL_CTX_free(ret);
2209         return(NULL);
2210         }
2211
2212 #if 0
2213 static void SSL_COMP_free(SSL_COMP *comp)
2214     { OPENSSL_free(comp); }
2215 #endif
2216
2217 #ifndef OPENSSL_NO_BUF_FREELISTS
2218 static void
2219 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2220         {
2221         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2222         for (ent = list->head; ent; ent = next)
2223                 {
2224                 next = ent->next;
2225                 OPENSSL_free(ent);
2226                 }
2227         OPENSSL_free(list);
2228         }
2229 #endif
2230
2231 void SSL_CTX_free(SSL_CTX *a)
2232         {
2233         int i;
2234
2235         if (a == NULL) return;
2236
2237         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2238 #ifdef REF_PRINT
2239         REF_PRINT("SSL_CTX",a);
2240 #endif
2241         if (i > 0) return;
2242 #ifdef REF_CHECK
2243         if (i < 0)
2244                 {
2245                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2246                 abort(); /* ok */
2247                 }
2248 #endif
2249
2250         if (a->param)
2251                 X509_VERIFY_PARAM_free(a->param);
2252
2253         /*
2254          * Free internal session cache. However: the remove_cb() may reference
2255          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2256          * after the sessions were flushed.
2257          * As the ex_data handling routines might also touch the session cache,
2258          * the most secure solution seems to be: empty (flush) the cache, then
2259          * free ex_data, then finally free the cache.
2260          * (See ticket [openssl.org #212].)
2261          */
2262         if (a->sessions != NULL)
2263                 SSL_CTX_flush_sessions(a,0);
2264
2265         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2266
2267         if (a->sessions != NULL)
2268                 lh_SSL_SESSION_free(a->sessions);
2269
2270         if (a->cert_store != NULL)
2271                 X509_STORE_free(a->cert_store);
2272         if (a->cipher_list != NULL)
2273                 sk_SSL_CIPHER_free(a->cipher_list);
2274         if (a->cipher_list_by_id != NULL)
2275                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2276         if (a->cert != NULL)
2277                 ssl_cert_free(a->cert);
2278         if (a->client_CA != NULL)
2279                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2280         if (a->extra_certs != NULL)
2281                 sk_X509_pop_free(a->extra_certs,X509_free);
2282 #if 0 /* This should never be done, since it removes a global database */
2283         if (a->comp_methods != NULL)
2284                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2285 #else
2286         a->comp_methods = NULL;
2287 #endif
2288
2289         if (a->srtp_profiles)
2290                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2291
2292 #ifndef OPENSSL_NO_PSK
2293         if (a->psk_identity_hint)
2294                 OPENSSL_free(a->psk_identity_hint);
2295 #endif
2296 #ifndef OPENSSL_NO_SRP
2297         SSL_CTX_SRP_CTX_free(a);
2298 #endif
2299 #ifndef OPENSSL_NO_TLSEXT
2300         OPENSSL_free(a->custom_cli_ext_records);
2301         OPENSSL_free(a->custom_srv_ext_records);
2302         OPENSSL_free(a->cli_supp_data_records);
2303         OPENSSL_free(a->srv_supp_data_records);
2304 #endif
2305 #ifndef OPENSSL_NO_ENGINE
2306         if (a->client_cert_engine)
2307                 ENGINE_finish(a->client_cert_engine);
2308 #endif
2309
2310 #ifndef OPENSSL_NO_BUF_FREELISTS
2311         if (a->wbuf_freelist)
2312                 ssl_buf_freelist_free(a->wbuf_freelist);
2313         if (a->rbuf_freelist)
2314                 ssl_buf_freelist_free(a->rbuf_freelist);
2315 #endif
2316 #ifndef OPENSSL_NO_TLSEXT
2317 # ifndef OPENSSL_NO_EC
2318         if (a->tlsext_ecpointformatlist)
2319                 OPENSSL_free(a->tlsext_ecpointformatlist);
2320         if (a->tlsext_ellipticcurvelist)
2321                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2322 # endif /* OPENSSL_NO_EC */
2323         if (a->alpn_client_proto_list != NULL)
2324                 OPENSSL_free(a->alpn_client_proto_list);
2325 #endif
2326
2327         OPENSSL_free(a);
2328         }
2329
2330 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2331         {
2332         ctx->default_passwd_callback=cb;
2333         }
2334
2335 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2336         {
2337         ctx->default_passwd_callback_userdata=u;
2338         }
2339
2340 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2341         {
2342         ctx->app_verify_callback=cb;
2343         ctx->app_verify_arg=arg;
2344         }
2345
2346 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2347         {
2348         ctx->verify_mode=mode;
2349         ctx->default_verify_callback=cb;
2350         }
2351
2352 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2353         {
2354         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2355         }
2356
2357 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2358         {
2359         ssl_cert_set_cert_cb(c->cert, cb, arg);
2360         }
2361
2362 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2363         {
2364         ssl_cert_set_cert_cb(s->cert, cb, arg);
2365         }
2366
2367 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2368         {
2369         CERT_PKEY *cpk;
2370         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2371         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2372         int rsa_tmp_export,dh_tmp_export,kl;
2373         unsigned long mask_k,mask_a,emask_k,emask_a;
2374 #ifndef OPENSSL_NO_ECDSA
2375         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2376 #endif
2377 #ifndef OPENSSL_NO_ECDH
2378         int have_ecdh_tmp, ecdh_ok;
2379 #endif
2380 #ifndef OPENSSL_NO_EC
2381         X509 *x = NULL;
2382         EVP_PKEY *ecc_pkey = NULL;
2383         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2384 #endif
2385         if (c == NULL) return;
2386
2387         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2388
2389 #ifndef OPENSSL_NO_RSA
2390         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2391         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2392                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2393 #else
2394         rsa_tmp=rsa_tmp_export=0;
2395 #endif
2396 #ifndef OPENSSL_NO_DH
2397         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2398         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2399                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2400 #else
2401         dh_tmp=dh_tmp_export=0;
2402 #endif
2403
2404 #ifndef OPENSSL_NO_ECDH
2405         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2406 #endif
2407         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2408         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2409         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2410         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2411         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2412         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2413         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2414         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2415         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2416         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2417         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2418 /* FIX THIS EAY EAY EAY */
2419         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2420         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2421         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2422 #ifndef OPENSSL_NO_EC
2423         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2424 #endif
2425         mask_k=0;
2426         mask_a=0;
2427         emask_k=0;
2428         emask_a=0;
2429
2430
2431
2432 #ifdef CIPHER_DEBUG
2433         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2434                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2435                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2436 #endif
2437
2438         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2439         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2440                 mask_k |= SSL_kGOST;
2441                 mask_a |= SSL_aGOST01;
2442         }
2443         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2444         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2445                 mask_k |= SSL_kGOST;
2446                 mask_a |= SSL_aGOST94;
2447         }
2448
2449         if (rsa_enc || (rsa_tmp && rsa_sign))
2450                 mask_k|=SSL_kRSA;
2451         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2452                 emask_k|=SSL_kRSA;
2453
2454 #if 0
2455         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2456         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2457                 (rsa_enc || rsa_sign || dsa_sign))
2458                 mask_k|=SSL_kEDH;
2459         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2460                 (rsa_enc || rsa_sign || dsa_sign))
2461                 emask_k|=SSL_kEDH;
2462 #endif
2463
2464         if (dh_tmp_export)
2465                 emask_k|=SSL_kEDH;
2466
2467         if (dh_tmp)
2468                 mask_k|=SSL_kEDH;
2469
2470         if (dh_rsa) mask_k|=SSL_kDHr;
2471         if (dh_rsa_export) emask_k|=SSL_kDHr;
2472
2473         if (dh_dsa) mask_k|=SSL_kDHd;
2474         if (dh_dsa_export) emask_k|=SSL_kDHd;
2475
2476         if (emask_k & (SSL_kDHr|SSL_kDHd))
2477                 mask_a |= SSL_aDH;
2478
2479         if (rsa_enc || rsa_sign)
2480                 {
2481                 mask_a|=SSL_aRSA;
2482                 emask_a|=SSL_aRSA;
2483                 }
2484
2485         if (dsa_sign)
2486                 {
2487                 mask_a|=SSL_aDSS;
2488                 emask_a|=SSL_aDSS;
2489                 }
2490
2491         mask_a|=SSL_aNULL;
2492         emask_a|=SSL_aNULL;
2493
2494 #ifndef OPENSSL_NO_KRB5
2495         mask_k|=SSL_kKRB5;
2496         mask_a|=SSL_aKRB5;
2497         emask_k|=SSL_kKRB5;
2498         emask_a|=SSL_aKRB5;
2499 #endif
2500
2501         /* An ECC certificate may be usable for ECDH and/or
2502          * ECDSA cipher suites depending on the key usage extension.
2503          */
2504 #ifndef OPENSSL_NO_EC
2505         if (have_ecc_cert)
2506                 {
2507                 cpk = &c->pkeys[SSL_PKEY_ECC];
2508                 x = cpk->x509;
2509                 /* This call populates extension flags (ex_flags) */
2510                 X509_check_purpose(x, -1, 0);
2511                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2512                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2513                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2514                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2515                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2516                         ecdsa_ok = 0;
2517                 ecc_pkey = X509_get_pubkey(x);
2518                 ecc_pkey_size = (ecc_pkey != NULL) ?
2519                     EVP_PKEY_bits(ecc_pkey) : 0;
2520                 EVP_PKEY_free(ecc_pkey);
2521                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2522                         {
2523                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2524                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2525                         }
2526 #ifndef OPENSSL_NO_ECDH
2527                 if (ecdh_ok)
2528                         {
2529
2530                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2531                                 {
2532                                 mask_k|=SSL_kECDHr;
2533                                 mask_a|=SSL_aECDH;
2534                                 if (ecc_pkey_size <= 163)
2535                                         {
2536                                         emask_k|=SSL_kECDHr;
2537                                         emask_a|=SSL_aECDH;
2538                                         }
2539                                 }
2540
2541                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2542                                 {
2543                                 mask_k|=SSL_kECDHe;
2544                                 mask_a|=SSL_aECDH;
2545                                 if (ecc_pkey_size <= 163)
2546                                         {
2547                                         emask_k|=SSL_kECDHe;
2548                                         emask_a|=SSL_aECDH;
2549                                         }
2550                                 }
2551                         }
2552 #endif
2553 #ifndef OPENSSL_NO_ECDSA
2554                 if (ecdsa_ok)
2555                         {
2556                         mask_a|=SSL_aECDSA;
2557                         emask_a|=SSL_aECDSA;
2558                         }
2559 #endif
2560                 }
2561 #endif
2562
2563 #ifndef OPENSSL_NO_ECDH
2564         if (have_ecdh_tmp)
2565                 {
2566                 mask_k|=SSL_kEECDH;
2567                 emask_k|=SSL_kEECDH;
2568                 }
2569 #endif
2570
2571 #ifndef OPENSSL_NO_PSK
2572         mask_k |= SSL_kPSK;
2573         mask_a |= SSL_aPSK;
2574         emask_k |= SSL_kPSK;
2575         emask_a |= SSL_aPSK;
2576 #endif
2577
2578         c->mask_k=mask_k;
2579         c->mask_a=mask_a;
2580         c->export_mask_k=emask_k;
2581         c->export_mask_a=emask_a;
2582         c->valid=1;
2583         }
2584
2585 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2586 #define ku_reject(x, usage) \
2587         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2588
2589 #ifndef OPENSSL_NO_EC
2590
2591 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2592         {
2593         unsigned long alg_k, alg_a;
2594         EVP_PKEY *pkey = NULL;
2595         int keysize = 0;
2596         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2597         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2598
2599         alg_k = cs->algorithm_mkey;
2600         alg_a = cs->algorithm_auth;
2601
2602         if (SSL_C_IS_EXPORT(cs))
2603                 {
2604                 /* ECDH key length in export ciphers must be <= 163 bits */
2605                 pkey = X509_get_pubkey(x);
2606                 if (pkey == NULL) return 0;
2607                 keysize = EVP_PKEY_bits(pkey);
2608                 EVP_PKEY_free(pkey);
2609                 if (keysize > 163) return 0;
2610                 }
2611
2612         /* This call populates the ex_flags field correctly */
2613         X509_check_purpose(x, -1, 0);
2614         if ((x->sig_alg) && (x->sig_alg->algorithm))
2615                 {
2616                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2617                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2618                 }
2619         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2620                 {
2621                 /* key usage, if present, must allow key agreement */
2622                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2623                         {
2624                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2625                         return 0;
2626                         }
2627                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2628                         {
2629                         /* signature alg must be ECDSA */
2630                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2631                                 {
2632                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2633                                 return 0;
2634                                 }
2635                         }
2636                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2637                         {
2638                         /* signature alg must be RSA */
2639
2640                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2641                                 {
2642                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2643                                 return 0;
2644                                 }
2645                         }
2646                 }
2647         if (alg_a & SSL_aECDSA)
2648                 {
2649                 /* key usage, if present, must allow signing */
2650                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2651                         {
2652                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2653                         return 0;
2654                         }
2655                 }
2656
2657         return 1;  /* all checks are ok */
2658         }
2659
2660 #endif
2661
2662 static int ssl_get_server_cert_index(const SSL *s)
2663         {
2664         int idx;
2665         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2666         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2667                 idx = SSL_PKEY_RSA_SIGN;
2668         if (idx == -1)
2669                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2670         return idx;
2671         }
2672
2673 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2674         {
2675         CERT *c;
2676         int i;
2677
2678         c = s->cert;
2679         if (!s->s3 || !s->s3->tmp.new_cipher)
2680                 return NULL;
2681         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2682
2683 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2684         /* Broken protocol test: return last used certificate: which may
2685          * mismatch the one expected.
2686          */
2687         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2688                 return c->key;
2689 #endif
2690
2691         i = ssl_get_server_cert_index(s);
2692
2693         /* This may or may not be an error. */
2694         if (i < 0)
2695                 return NULL;
2696
2697         /* May be NULL. */
2698         return &c->pkeys[i];
2699         }
2700
2701 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2702         {
2703         unsigned long alg_a;
2704         CERT *c;
2705         int idx = -1;
2706
2707         alg_a = cipher->algorithm_auth;
2708         c=s->cert;
2709
2710 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2711         /* Broken protocol test: use last key: which may
2712          * mismatch the one expected.
2713          */
2714         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2715                 idx = c->key - c->pkeys;
2716         else
2717 #endif
2718
2719         if ((alg_a & SSL_aDSS) &&
2720                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2721                 idx = SSL_PKEY_DSA_SIGN;
2722         else if (alg_a & SSL_aRSA)
2723                 {
2724                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2725                         idx = SSL_PKEY_RSA_SIGN;
2726                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2727                         idx = SSL_PKEY_RSA_ENC;
2728                 }
2729         else if ((alg_a & SSL_aECDSA) &&
2730                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2731                 idx = SSL_PKEY_ECC;
2732         if (idx == -1)
2733                 {
2734                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2735                 return(NULL);
2736                 }
2737         if (pmd)
2738                 *pmd = c->pkeys[idx].digest;
2739         return c->pkeys[idx].privatekey;
2740         }
2741
2742 #ifndef OPENSSL_NO_TLSEXT
2743 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2744                                    size_t *serverinfo_length)
2745         {
2746         CERT *c = NULL;
2747         int i = 0;
2748         *serverinfo_length = 0;
2749
2750         c = s->cert;
2751         i = ssl_get_server_cert_index(s);
2752
2753         if (i == -1)
2754                 return 0;
2755         if (c->pkeys[i].serverinfo == NULL)
2756                 return 0;
2757
2758         *serverinfo = c->pkeys[i].serverinfo;
2759         *serverinfo_length = c->pkeys[i].serverinfo_length;
2760         return 1;
2761         }
2762 #endif
2763
2764 void ssl_update_cache(SSL *s,int mode)
2765         {
2766         int i;
2767
2768         /* If the session_id_length is 0, we are not supposed to cache it,
2769          * and it would be rather hard to do anyway :-) */
2770         if (s->session->session_id_length == 0) return;
2771
2772         i=s->session_ctx->session_cache_mode;
2773         if ((i & mode) && (!s->hit)
2774                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2775                     || SSL_CTX_add_session(s->session_ctx,s->session))
2776                 && (s->session_ctx->new_session_cb != NULL))
2777                 {
2778                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2779                 if (!s->session_ctx->new_session_cb(s,s->session))
2780                         SSL_SESSION_free(s->session);
2781                 }
2782
2783         /* auto flush every 255 connections */
2784         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2785                 ((i & mode) == mode))
2786                 {
2787                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2788                         ?s->session_ctx->stats.sess_connect_good
2789                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2790                         {
2791                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2792                         }
2793                 }
2794         }
2795
2796 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2797         {
2798         return ctx->method;
2799         }
2800
2801 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2802         {
2803         return(s->method);
2804         }
2805
2806 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2807         {
2808         int conn= -1;
2809         int ret=1;
2810
2811         if (s->method != meth)
2812                 {
2813                 if (s->handshake_func != NULL)
2814                         conn=(s->handshake_func == s->method->ssl_connect);
2815
2816                 if (s->method->version == meth->version)
2817                         s->method=meth;
2818                 else
2819                         {
2820                         s->method->ssl_free(s);
2821                         s->method=meth;
2822                         ret=s->method->ssl_new(s);
2823                         }
2824
2825                 if (conn == 1)
2826                         s->handshake_func=meth->ssl_connect;
2827                 else if (conn == 0)
2828                         s->handshake_func=meth->ssl_accept;
2829                 }
2830         return(ret);
2831         }
2832
2833 int SSL_get_error(const SSL *s,int i)
2834         {
2835         int reason;
2836         unsigned long l;
2837         BIO *bio;
2838
2839         if (i > 0) return(SSL_ERROR_NONE);
2840
2841         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2842          * etc, where we do encode the error */
2843         if ((l=ERR_peek_error()) != 0)
2844                 {
2845                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2846                         return(SSL_ERROR_SYSCALL);
2847                 else
2848                         return(SSL_ERROR_SSL);
2849                 }
2850
2851         if ((i < 0) && SSL_want_read(s))
2852                 {
2853                 bio=SSL_get_rbio(s);
2854                 if (BIO_should_read(bio))
2855                         return(SSL_ERROR_WANT_READ);
2856                 else if (BIO_should_write(bio))
2857                         /* This one doesn't make too much sense ... We never try
2858                          * to write to the rbio, and an application program where
2859                          * rbio and wbio are separate couldn't even know what it
2860                          * should wait for.
2861                          * However if we ever set s->rwstate incorrectly
2862                          * (so that we have SSL_want_read(s) instead of
2863                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2864                          * this test works around that bug; so it might be safer
2865                          * to keep it. */
2866                         return(SSL_ERROR_WANT_WRITE);
2867                 else if (BIO_should_io_special(bio))
2868                         {
2869                         reason=BIO_get_retry_reason(bio);
2870                         if (reason == BIO_RR_CONNECT)
2871                                 return(SSL_ERROR_WANT_CONNECT);
2872                         else if (reason == BIO_RR_ACCEPT)
2873                                 return(SSL_ERROR_WANT_ACCEPT);
2874                         else
2875                                 return(SSL_ERROR_SYSCALL); /* unknown */
2876                         }
2877                 }
2878
2879         if ((i < 0) && SSL_want_write(s))
2880                 {
2881                 bio=SSL_get_wbio(s);
2882                 if (BIO_should_write(bio))
2883                         return(SSL_ERROR_WANT_WRITE);
2884                 else if (BIO_should_read(bio))
2885                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2886                         return(SSL_ERROR_WANT_READ);
2887                 else if (BIO_should_io_special(bio))
2888                         {
2889                         reason=BIO_get_retry_reason(bio);
2890                         if (reason == BIO_RR_CONNECT)
2891                                 return(SSL_ERROR_WANT_CONNECT);
2892                         else if (reason == BIO_RR_ACCEPT)
2893                                 return(SSL_ERROR_WANT_ACCEPT);
2894                         else
2895                                 return(SSL_ERROR_SYSCALL);
2896                         }
2897                 }
2898         if ((i < 0) && SSL_want_x509_lookup(s))
2899                 {
2900                 return(SSL_ERROR_WANT_X509_LOOKUP);
2901                 }
2902
2903         if (i == 0)
2904                 {
2905                 if (s->version == SSL2_VERSION)
2906                         {
2907                         /* assume it is the socket being closed */
2908                         return(SSL_ERROR_ZERO_RETURN);
2909                         }
2910                 else
2911                         {
2912                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2913                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2914                                 return(SSL_ERROR_ZERO_RETURN);
2915                         }
2916                 }
2917         return(SSL_ERROR_SYSCALL);
2918         }
2919
2920 int SSL_do_handshake(SSL *s)
2921         {
2922         int ret=1;
2923
2924         if (s->handshake_func == NULL)
2925                 {
2926                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2927                 return(-1);
2928                 }
2929
2930         s->method->ssl_renegotiate_check(s);
2931
2932         if (SSL_in_init(s) || SSL_in_before(s))
2933                 {
2934                 ret=s->handshake_func(s);
2935                 }
2936         return(ret);
2937         }
2938
2939 /* For the next 2 functions, SSL_clear() sets shutdown and so
2940  * one of these calls will reset it */
2941 void SSL_set_accept_state(SSL *s)
2942         {
2943         s->server=1;
2944         s->shutdown=0;
2945         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2946         s->handshake_func=s->method->ssl_accept;
2947         /* clear the current cipher */
2948         ssl_clear_cipher_ctx(s);
2949         ssl_clear_hash_ctx(&s->read_hash);
2950         ssl_clear_hash_ctx(&s->write_hash);
2951         }
2952
2953 void SSL_set_connect_state(SSL *s)
2954         {
2955         s->server=0;
2956         s->shutdown=0;
2957         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2958         s->handshake_func=s->method->ssl_connect;
2959         /* clear the current cipher */
2960         ssl_clear_cipher_ctx(s);
2961         ssl_clear_hash_ctx(&s->read_hash);
2962         ssl_clear_hash_ctx(&s->write_hash);
2963         }
2964
2965 int ssl_undefined_function(SSL *s)
2966         {
2967         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2968         return(0);
2969         }
2970
2971 int ssl_undefined_void_function(void)
2972         {
2973         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2974         return(0);
2975         }
2976
2977 int ssl_undefined_const_function(const SSL *s)
2978         {
2979         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2980         return(0);
2981         }
2982
2983 SSL_METHOD *ssl_bad_method(int ver)
2984         {
2985         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2986         return(NULL);
2987         }
2988
2989 const char *SSL_get_version(const SSL *s)
2990         {
2991         if (s->version == TLS1_2_VERSION)
2992                 return("TLSv1.2");
2993         else if (s->version == TLS1_1_VERSION)
2994                 return("TLSv1.1");
2995         else if (s->version == TLS1_VERSION)
2996                 return("TLSv1");
2997         else if (s->version == SSL3_VERSION)
2998                 return("SSLv3");
2999         else if (s->version == SSL2_VERSION)
3000                 return("SSLv2");
3001         else
3002                 return("unknown");
3003         }
3004
3005 SSL *SSL_dup(SSL *s)
3006         {
3007         STACK_OF(X509_NAME) *sk;
3008         X509_NAME *xn;
3009         SSL *ret;
3010         int i;
3011
3012         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3013             return(NULL);
3014
3015         ret->version = s->version;
3016         ret->type = s->type;
3017         ret->method = s->method;
3018
3019         if (s->session != NULL)
3020                 {
3021                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
3022                 SSL_copy_session_id(ret,s);
3023                 }
3024         else
3025                 {
3026                 /* No session has been established yet, so we have to expect
3027                  * that s->cert or ret->cert will be changed later --
3028                  * they should not both point to the same object,
3029                  * and thus we can't use SSL_copy_session_id. */
3030
3031                 ret->method->ssl_free(ret);
3032                 ret->method = s->method;
3033                 ret->method->ssl_new(ret);
3034
3035                 if (s->cert != NULL)
3036                         {
3037                         if (ret->cert != NULL)
3038                                 {
3039                                 ssl_cert_free(ret->cert);
3040                                 }
3041                         ret->cert = ssl_cert_dup(s->cert);
3042                         if (ret->cert == NULL)
3043                                 goto err;
3044                         }
3045
3046                 SSL_set_session_id_context(ret,
3047                         s->sid_ctx, s->sid_ctx_length);
3048                 }
3049
3050         ret->options=s->options;
3051         ret->mode=s->mode;
3052         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
3053         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
3054         ret->msg_callback = s->msg_callback;
3055         ret->msg_callback_arg = s->msg_callback_arg;
3056         SSL_set_verify(ret,SSL_get_verify_mode(s),
3057                 SSL_get_verify_callback(s));
3058         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
3059         ret->generate_session_id = s->generate_session_id;
3060
3061         SSL_set_info_callback(ret,SSL_get_info_callback(s));
3062
3063         ret->debug=s->debug;
3064
3065         /* copy app data, a little dangerous perhaps */
3066         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3067                 goto err;
3068
3069         /* setup rbio, and wbio */
3070         if (s->rbio != NULL)
3071                 {
3072                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
3073                         goto err;
3074                 }
3075         if (s->wbio != NULL)
3076                 {
3077                 if (s->wbio != s->rbio)
3078                         {
3079                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
3080                                 goto err;
3081                         }
3082                 else
3083                         ret->wbio=ret->rbio;
3084                 }
3085         ret->rwstate = s->rwstate;
3086         ret->in_handshake = s->in_handshake;
3087         ret->handshake_func = s->handshake_func;
3088         ret->server = s->server;
3089         ret->renegotiate = s->renegotiate;
3090         ret->new_session = s->new_session;
3091         ret->quiet_shutdown = s->quiet_shutdown;
3092         ret->shutdown=s->shutdown;
3093         ret->state=s->state; /* SSL_dup does not really work at any state, though */
3094         ret->rstate=s->rstate;
3095         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
3096         ret->hit=s->hit;
3097
3098         X509_VERIFY_PARAM_inherit(ret->param, s->param);
3099
3100         /* dup the cipher_list and cipher_list_by_id stacks */
3101         if (s->cipher_list != NULL)
3102                 {
3103                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3104                         goto err;
3105                 }
3106         if (s->cipher_list_by_id != NULL)
3107                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3108                         == NULL)
3109                         goto err;
3110
3111         /* Dup the client_CA list */
3112         if (s->client_CA != NULL)
3113                 {
3114                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
3115                 ret->client_CA=sk;
3116                 for (i=0; i<sk_X509_NAME_num(sk); i++)
3117                         {
3118                         xn=sk_X509_NAME_value(sk,i);
3119                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
3120                                 {
3121                                 X509_NAME_free(xn);
3122                                 goto err;
3123                                 }
3124                         }
3125                 }
3126
3127         if (0)
3128                 {
3129 err:
3130                 if (ret != NULL) SSL_free(ret);
3131                 ret=NULL;
3132                 }
3133         return(ret);
3134         }
3135
3136 void ssl_clear_cipher_ctx(SSL *s)
3137         {
3138         if (s->enc_read_ctx != NULL)
3139                 {
3140                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
3141                 OPENSSL_free(s->enc_read_ctx);
3142                 s->enc_read_ctx=NULL;
3143                 }
3144         if (s->enc_write_ctx != NULL)
3145                 {
3146                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
3147                 OPENSSL_free(s->enc_write_ctx);
3148                 s->enc_write_ctx=NULL;
3149                 }
3150 #ifndef OPENSSL_NO_COMP
3151         if (s->expand != NULL)
3152                 {
3153                 COMP_CTX_free(s->expand);
3154                 s->expand=NULL;
3155                 }
3156         if (s->compress != NULL)
3157                 {
3158                 COMP_CTX_free(s->compress);
3159                 s->compress=NULL;
3160                 }
3161 #endif
3162         }
3163
3164 X509 *SSL_get_certificate(const SSL *s)
3165         {
3166         if (s->cert != NULL)
3167                 return(s->cert->key->x509);
3168         else
3169                 return(NULL);
3170         }
3171
3172 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3173         {
3174         if (s->cert != NULL)
3175                 return(s->cert->key->privatekey);
3176         else
3177                 return(NULL);
3178         }
3179
3180 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3181         {
3182         if (ctx->cert != NULL)
3183                 return ctx->cert->key->x509;
3184         else
3185                 return NULL;
3186         }
3187
3188 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3189         {
3190         if (ctx->cert != NULL)
3191                 return ctx->cert->key->privatekey;
3192         else
3193                 return NULL ;
3194         }
3195
3196 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3197         {
3198         if ((s->session != NULL) && (s->session->cipher != NULL))
3199                 return(s->session->cipher);
3200         return(NULL);
3201         }
3202 #ifdef OPENSSL_NO_COMP
3203 const void *SSL_get_current_compression(SSL *s)
3204         {
3205         return NULL;
3206         }
3207 const void *SSL_get_current_expansion(SSL *s)
3208         {
3209         return NULL;
3210         }
3211 #else
3212
3213 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3214         {
3215         if (s->compress != NULL)
3216                 return(s->compress->meth);
3217         return(NULL);
3218         }
3219
3220 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3221         {
3222         if (s->expand != NULL)
3223                 return(s->expand->meth);
3224         return(NULL);
3225         }
3226 #endif
3227
3228 int ssl_init_wbio_buffer(SSL *s,int push)
3229         {
3230         BIO *bbio;
3231
3232         if (s->bbio == NULL)
3233                 {
3234                 bbio=BIO_new(BIO_f_buffer());
3235                 if (bbio == NULL) return(0);
3236                 s->bbio=bbio;
3237                 }
3238         else
3239                 {
3240                 bbio=s->bbio;
3241                 if (s->bbio == s->wbio)
3242                         s->wbio=BIO_pop(s->wbio);
3243                 }
3244         (void)BIO_reset(bbio);
3245 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3246         if (!BIO_set_read_buffer_size(bbio,1))
3247                 {
3248                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3249                 return(0);
3250                 }
3251         if (push)
3252                 {
3253                 if (s->wbio != bbio)
3254                         s->wbio=BIO_push(bbio,s->wbio);
3255                 }
3256         else
3257                 {
3258                 if (s->wbio == bbio)
3259                         s->wbio=BIO_pop(bbio);
3260                 }
3261         return(1);
3262         }
3263
3264 void ssl_free_wbio_buffer(SSL *s)
3265         {
3266         if (s->bbio == NULL) return;
3267
3268         if (s->bbio == s->wbio)
3269                 {
3270                 /* remove buffering */
3271                 s->wbio=BIO_pop(s->wbio);
3272 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3273                 assert(s->wbio != NULL);
3274 #endif
3275         }
3276         BIO_free(s->bbio);
3277         s->bbio=NULL;
3278         }
3279
3280 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3281         {
3282         ctx->quiet_shutdown=mode;
3283         }
3284
3285 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3286         {
3287         return(ctx->quiet_shutdown);
3288         }
3289
3290 void SSL_set_quiet_shutdown(SSL *s,int mode)
3291         {
3292         s->quiet_shutdown=mode;
3293         }
3294
3295 int SSL_get_quiet_shutdown(const SSL *s)
3296         {
3297         return(s->quiet_shutdown);
3298         }
3299
3300 void SSL_set_shutdown(SSL *s,int mode)
3301         {
3302         s->shutdown=mode;
3303         }
3304
3305 int SSL_get_shutdown(const SSL *s)
3306         {
3307         return(s->shutdown);
3308         }
3309
3310 int SSL_version(const SSL *s)
3311         {
3312         return(s->version);
3313         }
3314
3315 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3316         {
3317         return(ssl->ctx);
3318         }
3319
3320 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3321         {
3322         if (ssl->ctx == ctx)
3323                 return ssl->ctx;
3324 #ifndef OPENSSL_NO_TLSEXT
3325         if (ctx == NULL)
3326                 ctx = ssl->initial_ctx;
3327 #endif
3328         if (ssl->cert != NULL)
3329                 ssl_cert_free(ssl->cert);
3330         ssl->cert = ssl_cert_dup(ctx->cert);
3331         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3332         if (ssl->ctx != NULL)
3333                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3334         ssl->ctx = ctx;
3335         return(ssl->ctx);
3336         }
3337
3338 #ifndef OPENSSL_NO_STDIO
3339 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3340         {
3341         return(X509_STORE_set_default_paths(ctx->cert_store));
3342         }
3343
3344 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3345                 const char *CApath)
3346         {
3347         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3348         }
3349 #endif
3350
3351 void SSL_set_info_callback(SSL *ssl,
3352         void (*cb)(const SSL *ssl,int type,int val))
3353         {
3354         ssl->info_callback=cb;
3355         }
3356
3357 /* One compiler (Diab DCC) doesn't like argument names in returned
3358    function pointer.  */
3359 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3360         {
3361         return ssl->info_callback;
3362         }
3363
3364 int SSL_state(const SSL *ssl)
3365         {
3366         return(ssl->state);
3367         }
3368
3369 void SSL_set_state(SSL *ssl, int state)
3370         {
3371         ssl->state = state;
3372         }
3373
3374 void SSL_set_verify_result(SSL *ssl,long arg)
3375         {
3376         ssl->verify_result=arg;
3377         }
3378
3379 long SSL_get_verify_result(const SSL *ssl)
3380         {
3381         return(ssl->verify_result);
3382         }
3383
3384 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3385                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3386         {
3387         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3388                                 new_func, dup_func, free_func);
3389         }
3390
3391 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3392         {
3393         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3394         }
3395
3396 void *SSL_get_ex_data(const SSL *s,int idx)
3397         {
3398         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3399         }
3400
3401 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3402                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3403         {
3404         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3405                                 new_func, dup_func, free_func);
3406         }
3407
3408 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3409         {
3410         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3411         }
3412
3413 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3414         {
3415         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3416         }
3417
3418 int ssl_ok(SSL *s)
3419         {
3420         return(1);
3421         }
3422
3423 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3424         {
3425         return(ctx->cert_store);
3426         }
3427
3428 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3429         {
3430         if (ctx->cert_store != NULL)
3431                 X509_STORE_free(ctx->cert_store);
3432         ctx->cert_store=store;
3433         }
3434
3435 int SSL_want(const SSL *s)
3436         {
3437         return(s->rwstate);
3438         }
3439
3440 /*!
3441  * \brief Set the callback for generating temporary RSA keys.
3442  * \param ctx the SSL context.
3443  * \param cb the callback
3444  */
3445
3446 #ifndef OPENSSL_NO_RSA
3447 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3448                                                           int is_export,
3449                                                           int keylength))
3450     {
3451     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3452     }
3453
3454 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3455                                                   int is_export,
3456                                                   int keylength))
3457     {
3458     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3459     }
3460 #endif
3461
3462 #ifdef DOXYGEN
3463 /*!
3464  * \brief The RSA temporary key callback function.
3465  * \param ssl the SSL session.
3466  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3467  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3468  * of the required key in bits.
3469  * \return the temporary RSA key.
3470  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3471  */
3472
3473 RSA *cb(SSL *ssl,int is_export,int keylength)
3474     {}
3475 #endif
3476
3477 /*!
3478  * \brief Set the callback for generating temporary DH keys.
3479  * \param ctx the SSL context.
3480  * \param dh the callback
3481  */
3482
3483 #ifndef OPENSSL_NO_DH
3484 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3485                                                         int keylength))
3486         {
3487         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3488         }
3489
3490 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3491                                                 int keylength))
3492         {
3493         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3494         }
3495 #endif
3496
3497 #ifndef OPENSSL_NO_ECDH
3498 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3499                                                                 int keylength))
3500         {
3501         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3502         }
3503
3504 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3505                                                         int keylength))
3506         {
3507         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3508         }
3509 #endif
3510
3511 #ifndef OPENSSL_NO_PSK
3512 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3513         {
3514         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3515                 {
3516                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3517                 return 0;
3518                 }
3519         if (ctx->psk_identity_hint != NULL)
3520                 OPENSSL_free(ctx->psk_identity_hint);
3521         if (identity_hint != NULL)
3522                 {
3523                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3524                 if (ctx->psk_identity_hint == NULL)
3525                         return 0;
3526                 }
3527         else
3528                 ctx->psk_identity_hint = NULL;
3529         return 1;
3530         }
3531
3532 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3533         {
3534         if (s == NULL)
3535                 return 0;
3536
3537         if (s->session == NULL)
3538                 return 1; /* session not created yet, ignored */
3539
3540         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3541                 {
3542                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3543                 return 0;
3544                 }
3545         if (s->session->psk_identity_hint != NULL)
3546                 OPENSSL_free(s->session->psk_identity_hint);
3547         if (identity_hint != NULL)
3548                 {
3549                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3550                 if (s->session->psk_identity_hint == NULL)
3551                         return 0;
3552                 }
3553         else
3554                 s->session->psk_identity_hint = NULL;
3555         return 1;
3556         }
3557
3558 const char *SSL_get_psk_identity_hint(const SSL *s)
3559         {
3560         if (s == NULL || s->session == NULL)
3561                 return NULL;
3562         return(s->session->psk_identity_hint);
3563         }
3564
3565 const char *SSL_get_psk_identity(const SSL *s)
3566         {
3567         if (s == NULL || s->session == NULL)
3568                 return NULL;
3569         return(s->session->psk_identity);
3570         }
3571
3572 void SSL_set_psk_client_callback(SSL *s,
3573     unsigned int (*cb)(SSL *ssl, const char *hint,
3574                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3575                        unsigned int max_psk_len))
3576         {
3577         s->psk_client_callback = cb;
3578         }
3579
3580 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3581     unsigned int (*cb)(SSL *ssl, const char *hint,
3582                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3583                        unsigned int max_psk_len))
3584         {
3585         ctx->psk_client_callback = cb;
3586         }
3587
3588 void SSL_set_psk_server_callback(SSL *s,
3589     unsigned int (*cb)(SSL *ssl, const char *identity,
3590                        unsigned char *psk, unsigned int max_psk_len))
3591         {
3592         s->psk_server_callback = cb;
3593         }
3594
3595 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3596     unsigned int (*cb)(SSL *ssl, const char *identity,
3597                        unsigned char *psk, unsigned int max_psk_len))
3598         {
3599         ctx->psk_server_callback = cb;
3600         }
3601 #endif
3602
3603 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))
3604         {
3605         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3606         }
3607 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))
3608         {
3609         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3610         }
3611
3612 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3613  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3614  * any. If EVP_MD pointer is passed, initializes ctx with this md
3615  * Returns newly allocated ctx;
3616  */
3617
3618 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3619 {
3620         ssl_clear_hash_ctx(hash);
3621         *hash = EVP_MD_CTX_create();
3622         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3623         return *hash;
3624 }
3625 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3626 {
3627
3628         if (*hash) EVP_MD_CTX_destroy(*hash);
3629         *hash=NULL;
3630 }
3631
3632 void SSL_set_debug(SSL *s, int debug)
3633         {
3634         s->debug = debug;
3635         }
3636
3637 int SSL_cache_hit(SSL *s)
3638         {
3639         return s->hit;
3640         }
3641
3642 int SSL_is_server(SSL *s)
3643         {
3644         return s->server;
3645         }
3646
3647 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3648 #include "../crypto/bio/bss_file.c"
3649 #endif
3650
3651 IMPLEMENT_STACK_OF(SSL_CIPHER)
3652 IMPLEMENT_STACK_OF(SSL_COMP)
3653 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3654                                     ssl_cipher_id);