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);
 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 #endif
 385
 386         s->verify_result=X509_V_OK;
 387
 388         s->method=ctx->method;
 389
 390         if (!s->method->ssl_new(s))
 391                 goto err;
 392
 393         s->references=1;
 394         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 395
 396         SSL_clear(s);
 397
 398         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 399
 400 #ifndef OPENSSL_NO_PSK
 401         s->psk_client_callback=ctx->psk_client_callback;
 402         s->psk_server_callback=ctx->psk_server_callback;
 403 #endif
 404
 405         return(s);
 406 err:
 407         if (s != NULL)
 408                 {
 409                 if (s->cert != NULL)
 410                         ssl_cert_free(s->cert);
 411                 if (s->ctx != NULL)
 412                         SSL_CTX_free(s->ctx); /* decrement reference count */
 413                 OPENSSL_free(s);
 414                 }
 415         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 416         return(NULL);
 417         }
 418
 419 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 420                                    unsigned int sid_ctx_len)
 421     {
 422     if(sid_ctx_len > sizeof ctx->sid_ctx)
 423         {
 424         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 425         return 0;
 426         }
 427     ctx->sid_ctx_length=sid_ctx_len;
 428     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 429
 430     return 1;
 431     }
 432
 433 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 434                                unsigned int sid_ctx_len)
 435     {
 436     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 437         {
 438         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 439         return 0;
 440         }
 441     ssl->sid_ctx_length=sid_ctx_len;
 442     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 443
 444     return 1;
 445     }
 446
 447 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 448         {
 449         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 450         ctx->generate_session_id = cb;
 451         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 452         return 1;
 453         }
 454
 455 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 456         {
 457         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 458         ssl->generate_session_id = cb;
 459         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 460         return 1;
 461         }
 462
 463 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 464                                 unsigned int id_len)
 465         {
 466         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 467          * we can "construct" a session to give us the desired check - ie. to
 468          * find if there's a session in the hash table that would conflict with
 469          * any new session built out of this id/id_len and the ssl_version in
 470          * use by this SSL. */
 471         SSL_SESSION r, *p;
 472
 473         if(id_len > sizeof r.session_id)
 474                 return 0;
 475
 476         r.ssl_version = ssl->version;
 477         r.session_id_length = id_len;
 478         memcpy(r.session_id, id, id_len);
 479         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 480          * callback is calling us to check the uniqueness of a shorter ID, it
 481          * must be compared as a padded-out ID because that is what it will be
 482          * converted to when the callback has finished choosing it. */
 483         if((r.ssl_version == SSL2_VERSION) &&
 484                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 485                 {
 486                 memset(r.session_id + id_len, 0,
 487                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 488                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 489                 }
 490
 491         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 492         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 493         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 494         return (p != NULL);
 495         }
 496
 497 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 498         {
 499         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 500         }
 501
 502 int SSL_set_purpose(SSL *s, int purpose)
 503         {
 504         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 505         }
 506
 507 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 508         {
 509         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 510         }
 511
 512 int SSL_set_trust(SSL *s, int trust)
 513         {
 514         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 515         }
 516
 517 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 518         {
 519         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 520         }
 521
 522 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 523         {
 524         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 525         }
 526
 527 void SSL_certs_clear(SSL *s)
 528         {
 529         ssl_cert_clear_certs(s->cert);
 530         }
 531
 532 void SSL_free(SSL *s)
 533         {
 534         int i;
 535
 536         if(s == NULL)
 537             return;
 538
 539         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 540 #ifdef REF_PRINT
 541         REF_PRINT("SSL",s);
 542 #endif
 543         if (i > 0) return;
 544 #ifdef REF_CHECK
 545         if (i < 0)
 546                 {
 547                 fprintf(stderr,"SSL_free, bad reference count\n");
 548                 abort(); /* ok */
 549                 }
 550 #endif
 551
 552         if (s->param)
 553                 X509_VERIFY_PARAM_free(s->param);
 554
 555         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 556
 557         if (s->bbio != NULL)
 558                 {
 559                 /* If the buffering BIO is in place, pop it off */
 560                 if (s->bbio == s->wbio)
 561                         {
 562                         s->wbio=BIO_pop(s->wbio);
 563                         }
 564                 BIO_free(s->bbio);
 565                 s->bbio=NULL;
 566                 }
 567         if (s->rbio != NULL)
 568                 BIO_free_all(s->rbio);
 569         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 570                 BIO_free_all(s->wbio);
 571
 572         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 573
 574         /* add extra stuff */
 575         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 576         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 577
 578         /* Make the next call work :-) */
 579         if (s->session != NULL)
 580                 {
 581                 ssl_clear_bad_session(s);
 582                 SSL_SESSION_free(s->session);
 583                 }
 584
 585         ssl_clear_cipher_ctx(s);
 586         ssl_clear_hash_ctx(&s->read_hash);
 587         ssl_clear_hash_ctx(&s->write_hash);
 588
 589         if (s->cert != NULL) ssl_cert_free(s->cert);
 590         /* Free up if allocated */
 591
 592 #ifndef OPENSSL_NO_TLSEXT
 593         if (s->tlsext_hostname)
 594                 OPENSSL_free(s->tlsext_hostname);
 595         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 596 #ifndef OPENSSL_NO_EC
 597         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 598         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 599 #endif /* OPENSSL_NO_EC */
 600         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 601         if (s->tlsext_ocsp_exts)
 602                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 603                                                 X509_EXTENSION_free);
 604         if (s->tlsext_ocsp_ids)
 605                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 606         if (s->tlsext_ocsp_resp)
 607                 OPENSSL_free(s->tlsext_ocsp_resp);
 608 #endif
 609
 610         if (s->client_CA != NULL)
 611                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 612
 613         if (s->method != NULL) s->method->ssl_free(s);
 614
 615         if (s->ctx) SSL_CTX_free(s->ctx);
 616
 617 #ifndef OPENSSL_NO_KRB5
 618         if (s->kssl_ctx != NULL)
 619                 kssl_ctx_free(s->kssl_ctx);
 620 #endif  /* OPENSSL_NO_KRB5 */
 621
 622 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 623         if (s->next_proto_negotiated)
 624                 OPENSSL_free(s->next_proto_negotiated);
 625 #endif
 626
 627         if (s->srtp_profiles)
 628             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 629
 630         OPENSSL_free(s);
 631         }
 632
 633 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 634         {
 635         /* If the output buffering BIO is still in place, remove it
 636          */
 637         if (s->bbio != NULL)
 638                 {
 639                 if (s->wbio == s->bbio)
 640                         {
 641                         s->wbio=s->wbio->next_bio;
 642                         s->bbio->next_bio=NULL;
 643                         }
 644                 }
 645         if ((s->rbio != NULL) && (s->rbio != rbio))
 646                 BIO_free_all(s->rbio);
 647         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 648                 BIO_free_all(s->wbio);
 649         s->rbio=rbio;
 650         s->wbio=wbio;
 651         }
 652
 653 BIO *SSL_get_rbio(const SSL *s)
 654         { return(s->rbio); }
 655
 656 BIO *SSL_get_wbio(const SSL *s)
 657         { return(s->wbio); }
 658
 659 int SSL_get_fd(const SSL *s)
 660         {
 661         return(SSL_get_rfd(s));
 662         }
 663
 664 int SSL_get_rfd(const SSL *s)
 665         {
 666         int ret= -1;
 667         BIO *b,*r;
 668
 669         b=SSL_get_rbio(s);
 670         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 671         if (r != NULL)
 672                 BIO_get_fd(r,&ret);
 673         return(ret);
 674         }
 675
 676 int SSL_get_wfd(const SSL *s)
 677         {
 678         int ret= -1;
 679         BIO *b,*r;
 680
 681         b=SSL_get_wbio(s);
 682         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 683         if (r != NULL)
 684                 BIO_get_fd(r,&ret);
 685         return(ret);
 686         }
 687
 688 #ifndef OPENSSL_NO_SOCK
 689 int SSL_set_fd(SSL *s,int fd)
 690         {
 691         int ret=0;
 692         BIO *bio=NULL;
 693
 694         bio=BIO_new(BIO_s_socket());
 695
 696         if (bio == NULL)
 697                 {
 698                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 699                 goto err;
 700                 }
 701         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 702         SSL_set_bio(s,bio,bio);
 703         ret=1;
 704 err:
 705         return(ret);
 706         }
 707
 708 int SSL_set_wfd(SSL *s,int fd)
 709         {
 710         int ret=0;
 711         BIO *bio=NULL;
 712
 713         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 714                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 715                 {
 716                 bio=BIO_new(BIO_s_socket());
 717
 718                 if (bio == NULL)
 719                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 720                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 721                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 722                 }
 723         else
 724                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 725         ret=1;
 726 err:
 727         return(ret);
 728         }
 729
 730 int SSL_set_rfd(SSL *s,int fd)
 731         {
 732         int ret=0;
 733         BIO *bio=NULL;
 734
 735         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 736                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 737                 {
 738                 bio=BIO_new(BIO_s_socket());
 739
 740                 if (bio == NULL)
 741                         {
 742                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 743                         goto err;
 744                         }
 745                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 746                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 747                 }
 748         else
 749                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 750         ret=1;
 751 err:
 752         return(ret);
 753         }
 754 #endif
 755
 756
 757 /* return length of latest Finished message we sent, copy to 'buf' */
 758 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 759         {
 760         size_t ret = 0;
 761
 762         if (s->s3 != NULL)
 763                 {
 764                 ret = s->s3->tmp.finish_md_len;
 765                 if (count > ret)
 766                         count = ret;
 767                 memcpy(buf, s->s3->tmp.finish_md, count);
 768                 }
 769         return ret;
 770         }
 771
 772 /* return length of latest Finished message we expected, copy to 'buf' */
 773 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 774         {
 775         size_t ret = 0;
 776
 777         if (s->s3 != NULL)
 778                 {
 779                 ret = s->s3->tmp.peer_finish_md_len;
 780                 if (count > ret)
 781                         count = ret;
 782                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 783                 }
 784         return ret;
 785         }
 786
 787
 788 int SSL_get_verify_mode(const SSL *s)
 789         {
 790         return(s->verify_mode);
 791         }
 792
 793 int SSL_get_verify_depth(const SSL *s)
 794         {
 795         return X509_VERIFY_PARAM_get_depth(s->param);
 796         }
 797
 798 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 799         {
 800         return(s->verify_callback);
 801         }
 802
 803 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 804         {
 805         return(ctx->verify_mode);
 806         }
 807
 808 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 809         {
 810         return X509_VERIFY_PARAM_get_depth(ctx->param);
 811         }
 812
 813 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 814         {
 815         return(ctx->default_verify_callback);
 816         }
 817
 818 void SSL_set_verify(SSL *s,int mode,
 819                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 820         {
 821         s->verify_mode=mode;
 822         if (callback != NULL)
 823                 s->verify_callback=callback;
 824         }
 825
 826 void SSL_set_verify_depth(SSL *s,int depth)
 827         {
 828         X509_VERIFY_PARAM_set_depth(s->param, depth);
 829         }
 830
 831 void SSL_set_read_ahead(SSL *s,int yes)
 832         {
 833         s->read_ahead=yes;
 834         }
 835
 836 int SSL_get_read_ahead(const SSL *s)
 837         {
 838         return(s->read_ahead);
 839         }
 840
 841 int SSL_pending(const SSL *s)
 842         {
 843         /* SSL_pending cannot work properly if read-ahead is enabled
 844          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 845          * and it is impossible to fix since SSL_pending cannot report
 846          * errors that may be observed while scanning the new data.
 847          * (Note that SSL_pending() is often used as a boolean value,
 848          * so we'd better not return -1.)
 849          */
 850         return(s->method->ssl_pending(s));
 851         }
 852
 853 X509 *SSL_get_peer_certificate(const SSL *s)
 854         {
 855         X509 *r;
 856
 857         if ((s == NULL) || (s->session == NULL))
 858                 r=NULL;
 859         else
 860                 r=s->session->peer;
 861
 862         if (r == NULL) return(r);
 863
 864         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 865
 866         return(r);
 867         }
 868
 869 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 870         {
 871         STACK_OF(X509) *r;
 872
 873         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 874                 r=NULL;
 875         else
 876                 r=s->session->sess_cert->cert_chain;
 877
 878         /* If we are a client, cert_chain includes the peer's own
 879          * certificate; if we are a server, it does not. */
 880
 881         return(r);
 882         }
 883
 884 /* Now in theory, since the calling process own 't' it should be safe to
 885  * modify.  We need to be able to read f without being hassled */
 886 void SSL_copy_session_id(SSL *t,const SSL *f)
 887         {
 888         CERT *tmp;
 889
 890         /* Do we need to to SSL locking? */
 891         SSL_set_session(t,SSL_get_session(f));
 892
 893         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 894          * vice-versa */
 895         if (t->method != f->method)
 896                 {
 897                 t->method->ssl_free(t); /* cleanup current */
 898                 t->method=f->method;    /* change method */
 899                 t->method->ssl_new(t);  /* setup new */
 900                 }
 901
 902         tmp=t->cert;
 903         if (f->cert != NULL)
 904                 {
 905                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 906                 t->cert=f->cert;
 907                 }
 908         else
 909                 t->cert=NULL;
 910         if (tmp != NULL) ssl_cert_free(tmp);
 911         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 912         }
 913
 914 /* Fix this so it checks all the valid key/cert options */
 915 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 916         {
 917         if (    (ctx == NULL) ||
 918                 (ctx->cert == NULL) ||
 919                 (ctx->cert->key->x509 == NULL))
 920                 {
 921                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 922                 return(0);
 923                 }
 924         if      (ctx->cert->key->privatekey == NULL)
 925                 {
 926                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 927                 return(0);
 928                 }
 929         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 930         }
 931
 932 /* Fix this function so that it takes an optional type parameter */
 933 int SSL_check_private_key(const SSL *ssl)
 934         {
 935         if (ssl == NULL)
 936                 {
 937                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 938                 return(0);
 939                 }
 940         if (ssl->cert == NULL)
 941                 {
 942                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 943                 return 0;
 944                 }
 945         if (ssl->cert->key->x509 == NULL)
 946                 {
 947                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 948                 return(0);
 949                 }
 950         if (ssl->cert->key->privatekey == NULL)
 951                 {
 952                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 953                 return(0);
 954                 }
 955         return(X509_check_private_key(ssl->cert->key->x509,
 956                 ssl->cert->key->privatekey));
 957         }
 958
 959 int SSL_accept(SSL *s)
 960         {
 961         if (s->handshake_func == 0)
 962                 /* Not properly initialized yet */
 963                 SSL_set_accept_state(s);
 964
 965         return(s->method->ssl_accept(s));
 966         }
 967
 968 int SSL_connect(SSL *s)
 969         {
 970         if (s->handshake_func == 0)
 971                 /* Not properly initialized yet */
 972                 SSL_set_connect_state(s);
 973
 974         return(s->method->ssl_connect(s));
 975         }
 976
 977 long SSL_get_default_timeout(const SSL *s)
 978         {
 979         return(s->method->get_timeout());
 980         }
 981
 982 int SSL_read(SSL *s,void *buf,int num)
 983         {
 984         if (s->handshake_func == 0)
 985                 {
 986                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 987                 return -1;
 988                 }
 989
 990         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 991                 {
 992                 s->rwstate=SSL_NOTHING;
 993                 return(0);
 994                 }
 995         return(s->method->ssl_read(s,buf,num));
 996         }
 997
 998 int SSL_peek(SSL *s,void *buf,int num)
 999         {
1000         if (s->handshake_func == 0)
1001                 {
1002                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1003                 return -1;
1004                 }
1005
1006         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1007                 {
1008                 return(0);
1009                 }
1010         return(s->method->ssl_peek(s,buf,num));
1011         }
1012
1013 int SSL_write(SSL *s,const void *buf,int num)
1014         {
1015         if (s->handshake_func == 0)
1016                 {
1017                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1018                 return -1;
1019                 }
1020
1021         if (s->shutdown & SSL_SENT_SHUTDOWN)
1022                 {
1023                 s->rwstate=SSL_NOTHING;
1024                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1025                 return(-1);
1026                 }
1027         return(s->method->ssl_write(s,buf,num));
1028         }
1029
1030 int SSL_shutdown(SSL *s)
1031         {
1032         /* Note that this function behaves differently from what one might
1033          * expect.  Return values are 0 for no success (yet),
1034          * 1 for success; but calling it once is usually not enough,
1035          * even if blocking I/O is used (see ssl3_shutdown).
1036          */
1037
1038         if (s->handshake_func == 0)
1039                 {
1040                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1041                 return -1;
1042                 }
1043
1044         if ((s != NULL) && !SSL_in_init(s))
1045                 return(s->method->ssl_shutdown(s));
1046         else
1047                 return(1);
1048         }
1049
1050 int SSL_renegotiate(SSL *s)
1051         {
1052         if (s->renegotiate == 0)
1053                 s->renegotiate=1;
1054
1055         s->new_session=1;
1056
1057         return(s->method->ssl_renegotiate(s));
1058         }
1059
1060 int SSL_renegotiate_abbreviated(SSL *s)
1061         {
1062         if (s->renegotiate == 0)
1063                 s->renegotiate=1;
1064
1065         s->new_session=0;
1066
1067         return(s->method->ssl_renegotiate(s));
1068         }
1069
1070 int SSL_renegotiate_pending(SSL *s)
1071         {
1072         /* becomes true when negotiation is requested;
1073          * false again once a handshake has finished */
1074         return (s->renegotiate != 0);
1075         }
1076
1077 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1078         {
1079         long l;
1080
1081         switch (cmd)
1082                 {
1083         case SSL_CTRL_GET_READ_AHEAD:
1084                 return(s->read_ahead);
1085         case SSL_CTRL_SET_READ_AHEAD:
1086                 l=s->read_ahead;
1087                 s->read_ahead=larg;
1088                 return(l);
1089
1090         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1091                 s->msg_callback_arg = parg;
1092                 return 1;
1093
1094         case SSL_CTRL_OPTIONS:
1095                 return(s->options|=larg);
1096         case SSL_CTRL_CLEAR_OPTIONS:
1097                 return(s->options&=~larg);
1098         case SSL_CTRL_MODE:
1099                 return(s->mode|=larg);
1100         case SSL_CTRL_CLEAR_MODE:
1101                 return(s->mode &=~larg);
1102         case SSL_CTRL_GET_MAX_CERT_LIST:
1103                 return(s->max_cert_list);
1104         case SSL_CTRL_SET_MAX_CERT_LIST:
1105                 l=s->max_cert_list;
1106                 s->max_cert_list=larg;
1107                 return(l);
1108         case SSL_CTRL_SET_MTU:
1109 #ifndef OPENSSL_NO_DTLS1
1110                 if (larg < (long)dtls1_min_mtu())
1111                         return 0;
1112 #endif
1113
1114                 if (SSL_version(s) == DTLS1_VERSION ||
1115                     SSL_version(s) == DTLS1_BAD_VER)
1116                         {
1117                         s->d1->mtu = larg;
1118                         return larg;
1119                         }
1120                 return 0;
1121         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1122                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1123                         return 0;
1124                 s->max_send_fragment = larg;
1125                 return 1;
1126         case SSL_CTRL_GET_RI_SUPPORT:
1127                 if (s->s3)
1128                         return s->s3->send_connection_binding;
1129                 else return 0;
1130         default:
1131                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1132                 }
1133         }
1134
1135 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1136         {
1137         switch(cmd)
1138                 {
1139         case SSL_CTRL_SET_MSG_CALLBACK:
1140                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1141                 return 1;
1142
1143         default:
1144                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1145                 }
1146         }
1147
1148 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1149         {
1150         return ctx->sessions;
1151         }
1152
1153 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1154         {
1155         long l;
1156
1157         switch (cmd)
1158                 {
1159         case SSL_CTRL_GET_READ_AHEAD:
1160                 return(ctx->read_ahead);
1161         case SSL_CTRL_SET_READ_AHEAD:
1162                 l=ctx->read_ahead;
1163                 ctx->read_ahead=larg;
1164                 return(l);
1165
1166         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1167                 ctx->msg_callback_arg = parg;
1168                 return 1;
1169
1170         case SSL_CTRL_GET_MAX_CERT_LIST:
1171                 return(ctx->max_cert_list);
1172         case SSL_CTRL_SET_MAX_CERT_LIST:
1173                 l=ctx->max_cert_list;
1174                 ctx->max_cert_list=larg;
1175                 return(l);
1176
1177         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1178                 l=ctx->session_cache_size;
1179                 ctx->session_cache_size=larg;
1180                 return(l);
1181         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1182                 return(ctx->session_cache_size);
1183         case SSL_CTRL_SET_SESS_CACHE_MODE:
1184                 l=ctx->session_cache_mode;
1185                 ctx->session_cache_mode=larg;
1186                 return(l);
1187         case SSL_CTRL_GET_SESS_CACHE_MODE:
1188                 return(ctx->session_cache_mode);
1189
1190         case SSL_CTRL_SESS_NUMBER:
1191                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1192         case SSL_CTRL_SESS_CONNECT:
1193                 return(ctx->stats.sess_connect);
1194         case SSL_CTRL_SESS_CONNECT_GOOD:
1195                 return(ctx->stats.sess_connect_good);
1196         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1197                 return(ctx->stats.sess_connect_renegotiate);
1198         case SSL_CTRL_SESS_ACCEPT:
1199                 return(ctx->stats.sess_accept);
1200         case SSL_CTRL_SESS_ACCEPT_GOOD:
1201                 return(ctx->stats.sess_accept_good);
1202         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1203                 return(ctx->stats.sess_accept_renegotiate);
1204         case SSL_CTRL_SESS_HIT:
1205                 return(ctx->stats.sess_hit);
1206         case SSL_CTRL_SESS_CB_HIT:
1207                 return(ctx->stats.sess_cb_hit);
1208         case SSL_CTRL_SESS_MISSES:
1209                 return(ctx->stats.sess_miss);
1210         case SSL_CTRL_SESS_TIMEOUTS:
1211                 return(ctx->stats.sess_timeout);
1212         case SSL_CTRL_SESS_CACHE_FULL:
1213                 return(ctx->stats.sess_cache_full);
1214         case SSL_CTRL_OPTIONS:
1215                 return(ctx->options|=larg);
1216         case SSL_CTRL_CLEAR_OPTIONS:
1217                 return(ctx->options&=~larg);
1218         case SSL_CTRL_MODE:
1219                 return(ctx->mode|=larg);
1220         case SSL_CTRL_CLEAR_MODE:
1221                 return(ctx->mode&=~larg);
1222         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1223                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1224                         return 0;
1225                 ctx->max_send_fragment = larg;
1226                 return 1;
1227         default:
1228                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1229                 }
1230         }
1231
1232 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1233         {
1234         switch(cmd)
1235                 {
1236         case SSL_CTRL_SET_MSG_CALLBACK:
1237                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1238                 return 1;
1239
1240         default:
1241                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1242                 }
1243         }
1244
1245 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1246         {
1247         long l;
1248
1249         l=a->id-b->id;
1250         if (l == 0L)
1251                 return(0);
1252         else
1253                 return((l > 0)?1:-1);
1254         }
1255
1256 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1257                         const SSL_CIPHER * const *bp)
1258         {
1259         long l;
1260
1261         l=(*ap)->id-(*bp)->id;
1262         if (l == 0L)
1263                 return(0);
1264         else
1265                 return((l > 0)?1:-1);
1266         }
1267
1268 /** return a STACK of the ciphers available for the SSL and in order of
1269  * preference */
1270 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1271         {
1272         if (s != NULL)
1273                 {
1274                 if (s->cipher_list != NULL)
1275                         {
1276                         return(s->cipher_list);
1277                         }
1278                 else if ((s->ctx != NULL) &&
1279                         (s->ctx->cipher_list != NULL))
1280                         {
1281                         return(s->ctx->cipher_list);
1282                         }
1283                 }
1284         return(NULL);
1285         }
1286
1287 /** return a STACK of the ciphers available for the SSL and in order of
1288  * algorithm id */
1289 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1290         {
1291         if (s != NULL)
1292                 {
1293                 if (s->cipher_list_by_id != NULL)
1294                         {
1295                         return(s->cipher_list_by_id);
1296                         }
1297                 else if ((s->ctx != NULL) &&
1298                         (s->ctx->cipher_list_by_id != NULL))
1299                         {
1300                         return(s->ctx->cipher_list_by_id);
1301                         }
1302                 }
1303         return(NULL);
1304         }
1305
1306 /** The old interface to get the same thing as SSL_get_ciphers() */
1307 const char *SSL_get_cipher_list(const SSL *s,int n)
1308         {
1309         SSL_CIPHER *c;
1310         STACK_OF(SSL_CIPHER) *sk;
1311
1312         if (s == NULL) return(NULL);
1313         sk=SSL_get_ciphers(s);
1314         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1315                 return(NULL);
1316         c=sk_SSL_CIPHER_value(sk,n);
1317         if (c == NULL) return(NULL);
1318         return(c->name);
1319         }
1320
1321 /** specify the ciphers to be used by default by the SSL_CTX */
1322 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1323         {
1324         STACK_OF(SSL_CIPHER) *sk;
1325
1326         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1327                 &ctx->cipher_list_by_id,str);
1328         /* ssl_create_cipher_list may return an empty stack if it
1329          * was unable to find a cipher matching the given rule string
1330          * (for example if the rule string specifies a cipher which
1331          * has been disabled). This is not an error as far as
1332          * ssl_create_cipher_list is concerned, and hence
1333          * ctx->cipher_list and ctx->cipher_list_by_id has been
1334          * updated. */
1335         if (sk == NULL)
1336                 return 0;
1337         else if (sk_SSL_CIPHER_num(sk) == 0)
1338                 {
1339                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1340                 return 0;
1341                 }
1342         return 1;
1343         }
1344
1345 /** specify the ciphers to be used by the SSL */
1346 int SSL_set_cipher_list(SSL *s,const char *str)
1347         {
1348         STACK_OF(SSL_CIPHER) *sk;
1349
1350         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1351                 &s->cipher_list_by_id,str);
1352         /* see comment in SSL_CTX_set_cipher_list */
1353         if (sk == NULL)
1354                 return 0;
1355         else if (sk_SSL_CIPHER_num(sk) == 0)
1356                 {
1357                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1358                 return 0;
1359                 }
1360         return 1;
1361         }
1362
1363 /* works well for SSLv2, not so good for SSLv3 */
1364 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1365         {
1366         char *p;
1367         STACK_OF(SSL_CIPHER) *sk;
1368         SSL_CIPHER *c;
1369         int i;
1370
1371         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1372                 (len < 2))
1373                 return(NULL);
1374
1375         p=buf;
1376         sk=s->session->ciphers;
1377         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1378                 {
1379                 int n;
1380
1381                 c=sk_SSL_CIPHER_value(sk,i);
1382                 n=strlen(c->name);
1383                 if (n+1 > len)
1384                         {
1385                         if (p != buf)
1386                                 --p;
1387                         *p='\0';
1388                         return buf;
1389                         }
1390                 strcpy(p,c->name);
1391                 p+=n;
1392                 *(p++)=':';
1393                 len-=n+1;
1394                 }
1395         p[-1]='\0';
1396         return(buf);
1397         }
1398
1399 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1400                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1401         {
1402         int i,j=0;
1403         SSL_CIPHER *c;
1404         unsigned char *q;
1405 #ifndef OPENSSL_NO_KRB5
1406         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1407 #endif /* OPENSSL_NO_KRB5 */
1408
1409         if (sk == NULL) return(0);
1410         q=p;
1411
1412         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1413                 {
1414                 c=sk_SSL_CIPHER_value(sk,i);
1415                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1416                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1417                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1418                         continue;
1419 #ifndef OPENSSL_NO_KRB5
1420                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1421                     nokrb5)
1422                     continue;
1423 #endif /* OPENSSL_NO_KRB5 */
1424 #ifndef OPENSSL_NO_PSK
1425                 /* with PSK there must be client callback set */
1426                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1427                     s->psk_client_callback == NULL)
1428                         continue;
1429 #endif /* OPENSSL_NO_PSK */
1430                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1431                 p+=j;
1432                 }
1433         /* If p == q, no ciphers and caller indicates an error. Otherwise
1434          * add SCSV if not renegotiating.
1435          */
1436         if (p != q && !s->renegotiate)
1437                 {
1438                 static SSL_CIPHER scsv =
1439                         {
1440                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1441                         };
1442                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1443                 p+=j;
1444 #ifdef OPENSSL_RI_DEBUG
1445                 fprintf(stderr, "SCSV sent by client\n");
1446 #endif
1447                 }
1448
1449         return(p-q);
1450         }
1451
1452 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1453                                                STACK_OF(SSL_CIPHER) **skp)
1454         {
1455         const SSL_CIPHER *c;
1456         STACK_OF(SSL_CIPHER) *sk;
1457         int i,n;
1458         if (s->s3)
1459                 s->s3->send_connection_binding = 0;
1460
1461         n=ssl_put_cipher_by_char(s,NULL,NULL);
1462         if ((num%n) != 0)
1463                 {
1464                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1465                 return(NULL);
1466                 }
1467         if ((skp == NULL) || (*skp == NULL))
1468                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1469         else
1470                 {
1471                 sk= *skp;
1472                 sk_SSL_CIPHER_zero(sk);
1473                 }
1474
1475         for (i=0; i<num; i+=n)
1476                 {
1477                 /* Check for SCSV */
1478                 if (s->s3 && (n != 3 || !p[0]) &&
1479                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1480                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1481                         {
1482                         /* SCSV fatal if renegotiating */
1483                         if (s->renegotiate)
1484                                 {
1485                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1486                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1487                                 goto err;
1488                                 }
1489                         s->s3->send_connection_binding = 1;
1490                         p += n;
1491 #ifdef OPENSSL_RI_DEBUG
1492                         fprintf(stderr, "SCSV received by server\n");
1493 #endif
1494                         continue;
1495                         }
1496
1497                 c=ssl_get_cipher_by_char(s,p);
1498                 p+=n;
1499                 if (c != NULL)
1500                         {
1501                         if (!sk_SSL_CIPHER_push(sk,c))
1502                                 {
1503                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1504                                 goto err;
1505                                 }
1506                         }
1507                 }
1508
1509         if (skp != NULL)
1510                 *skp=sk;
1511         return(sk);
1512 err:
1513         if ((skp == NULL) || (*skp == NULL))
1514                 sk_SSL_CIPHER_free(sk);
1515         return(NULL);
1516         }
1517
1518
1519 #ifndef OPENSSL_NO_TLSEXT
1520 /** return a servername extension value if provided in Client Hello, or NULL.
1521  * So far, only host_name types are defined (RFC 3546).
1522  */
1523
1524 const char *SSL_get_servername(const SSL *s, const int type)
1525         {
1526         if (type != TLSEXT_NAMETYPE_host_name)
1527                 return NULL;
1528
1529         return s->session && !s->tlsext_hostname ?
1530                 s->session->tlsext_hostname :
1531                 s->tlsext_hostname;
1532         }
1533
1534 int SSL_get_servername_type(const SSL *s)
1535         {
1536         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1537                 return TLSEXT_NAMETYPE_host_name;
1538         return -1;
1539         }
1540
1541 # ifndef OPENSSL_NO_NEXTPROTONEG
1542 /* SSL_select_next_proto implements the standard protocol selection. It is
1543  * expected that this function is called from the callback set by
1544  * SSL_CTX_set_next_proto_select_cb.
1545  *
1546  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1547  * strings. The length byte itself is not included in the length. A byte
1548  * string of length 0 is invalid. No byte string may be truncated.
1549  *
1550  * The current, but experimental algorithm for selecting the protocol is:
1551  *
1552  * 1) If the server doesn't support NPN then this is indicated to the
1553  * callback. In this case, the client application has to abort the connection
1554  * or have a default application level protocol.
1555  *
1556  * 2) If the server supports NPN, but advertises an empty list then the
1557  * client selects the first protcol in its list, but indicates via the
1558  * API that this fallback case was enacted.
1559  *
1560  * 3) Otherwise, the client finds the first protocol in the server's list
1561  * that it supports and selects this protocol. This is because it's
1562  * assumed that the server has better information about which protocol
1563  * a client should use.
1564  *
1565  * 4) If the client doesn't support any of the server's advertised
1566  * protocols, then this is treated the same as case 2.
1567  *
1568  * It returns either
1569  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1570  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1571  */
1572 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)
1573         {
1574         unsigned int i, j;
1575         const unsigned char *result;
1576         int status = OPENSSL_NPN_UNSUPPORTED;
1577
1578         /* For each protocol in server preference order, see if we support it. */
1579         for (i = 0; i < server_len; )
1580                 {
1581                 for (j = 0; j < client_len; )
1582                         {
1583                         if (server[i] == client[j] &&
1584                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1585                                 {
1586                                 /* We found a match */
1587                                 result = &server[i];
1588                                 status = OPENSSL_NPN_NEGOTIATED;
1589                                 goto found;
1590                                 }
1591                         j += client[j];
1592                         j++;
1593                         }
1594                 i += server[i];
1595                 i++;
1596                 }
1597
1598         /* There's no overlap between our protocols and the server's list. */
1599         result = client;
1600         status = OPENSSL_NPN_NO_OVERLAP;
1601
1602         found:
1603         *out = (unsigned char *) result + 1;
1604         *outlen = result[0];
1605         return status;
1606         }
1607
1608 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1609  * requested protocol for this connection and returns 0. If the client didn't
1610  * request any protocol, then *data is set to NULL.
1611  *
1612  * Note that the client can request any protocol it chooses. The value returned
1613  * from this function need not be a member of the list of supported protocols
1614  * provided by the callback.
1615  */
1616 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1617         {
1618         *data = s->next_proto_negotiated;
1619         if (!*data) {
1620                 *len = 0;
1621         } else {
1622                 *len = s->next_proto_negotiated_len;
1623         }
1624 }
1625
1626 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1627  * TLS server needs a list of supported protocols for Next Protocol
1628  * Negotiation. The returned list must be in wire format.  The list is returned
1629  * by setting |out| to point to it and |outlen| to its length. This memory will
1630  * not be modified, but one should assume that the SSL* keeps a reference to
1631  * it.
1632  *
1633  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1634  * such extension will be included in the ServerHello. */
1635 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)
1636         {
1637         ctx->next_protos_advertised_cb = cb;
1638         ctx->next_protos_advertised_cb_arg = arg;
1639         }
1640
1641 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1642  * client needs to select a protocol from the server's provided list. |out|
1643  * must be set to point to the selected protocol (which may be within |in|).
1644  * The length of the protocol name must be written into |outlen|. The server's
1645  * advertised protocols are provided in |in| and |inlen|. The callback can
1646  * assume that |in| is syntactically valid.
1647  *
1648  * The client must select a protocol. It is fatal to the connection if this
1649  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1650  */
1651 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)
1652         {
1653         ctx->next_proto_select_cb = cb;
1654         ctx->next_proto_select_cb_arg = arg;
1655         }
1656 # endif
1657 #endif
1658
1659 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1660         const char *label, size_t llen, const unsigned char *p, size_t plen,
1661         int use_context)
1662         {
1663         if (s->version < TLS1_VERSION)
1664                 return -1;
1665
1666         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1667                                                            llen, p, plen,
1668                                                            use_context);
1669         }
1670
1671 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1672         {
1673         unsigned long l;
1674
1675         l=(unsigned long)
1676                 ((unsigned int) a->session_id[0]     )|
1677                 ((unsigned int) a->session_id[1]<< 8L)|
1678                 ((unsigned long)a->session_id[2]<<16L)|
1679                 ((unsigned long)a->session_id[3]<<24L);
1680         return(l);
1681         }
1682
1683 /* NB: If this function (or indeed the hash function which uses a sort of
1684  * coarser function than this one) is changed, ensure
1685  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1686  * able to construct an SSL_SESSION that will collide with any existing session
1687  * with a matching session ID. */
1688 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1689         {
1690         if (a->ssl_version != b->ssl_version)
1691                 return(1);
1692         if (a->session_id_length != b->session_id_length)
1693                 return(1);
1694         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1695         }
1696
1697 /* These wrapper functions should remain rather than redeclaring
1698  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1699  * variable. The reason is that the functions aren't static, they're exposed via
1700  * ssl.h. */
1701 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1702 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1703
1704 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1705         {
1706         SSL_CTX *ret=NULL;
1707
1708         if (meth == NULL)
1709                 {
1710                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1711                 return(NULL);
1712                 }
1713
1714 #ifdef OPENSSL_FIPS
1715         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1716                 {
1717                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1718                 return NULL;
1719                 }
1720 #endif
1721
1722         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1723                 {
1724                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1725                 goto err;
1726                 }
1727         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1728         if (ret == NULL)
1729                 goto err;
1730
1731         memset(ret,0,sizeof(SSL_CTX));
1732
1733         ret->method=meth;
1734
1735         ret->cert_store=NULL;
1736         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1737         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1738         ret->session_cache_head=NULL;
1739         ret->session_cache_tail=NULL;
1740
1741         /* We take the system default */
1742         ret->session_timeout=meth->get_timeout();
1743
1744         ret->new_session_cb=0;
1745         ret->remove_session_cb=0;
1746         ret->get_session_cb=0;
1747         ret->generate_session_id=0;
1748
1749         memset((char *)&ret->stats,0,sizeof(ret->stats));
1750
1751         ret->references=1;
1752         ret->quiet_shutdown=0;
1753
1754 /*      ret->cipher=NULL;*/
1755 /*      ret->s2->challenge=NULL;
1756         ret->master_key=NULL;
1757         ret->key_arg=NULL;
1758         ret->s2->conn_id=NULL; */
1759
1760         ret->info_callback=NULL;
1761
1762         ret->app_verify_callback=0;
1763         ret->app_verify_arg=NULL;
1764
1765         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1766         ret->read_ahead=0;
1767         ret->msg_callback=0;
1768         ret->msg_callback_arg=NULL;
1769         ret->verify_mode=SSL_VERIFY_NONE;
1770 #if 0
1771         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1772 #endif
1773         ret->sid_ctx_length=0;
1774         ret->default_verify_callback=NULL;
1775         if ((ret->cert=ssl_cert_new()) == NULL)
1776                 goto err;
1777
1778         ret->default_passwd_callback=0;
1779         ret->default_passwd_callback_userdata=NULL;
1780         ret->client_cert_cb=0;
1781         ret->app_gen_cookie_cb=0;
1782         ret->app_verify_cookie_cb=0;
1783
1784         ret->sessions=lh_SSL_SESSION_new();
1785         if (ret->sessions == NULL) goto err;
1786         ret->cert_store=X509_STORE_new();
1787         if (ret->cert_store == NULL) goto err;
1788
1789         ssl_create_cipher_list(ret->method,
1790                 &ret->cipher_list,&ret->cipher_list_by_id,
1791                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1792         if (ret->cipher_list == NULL
1793             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1794                 {
1795                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1796                 goto err2;
1797                 }
1798
1799         ret->param = X509_VERIFY_PARAM_new();
1800         if (!ret->param)
1801                 goto err;
1802
1803         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1804                 {
1805                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1806                 goto err2;
1807                 }
1808         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1809                 {
1810                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1811                 goto err2;
1812                 }
1813         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1814                 {
1815                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1816                 goto err2;
1817                 }
1818
1819         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1820                 goto err;
1821
1822         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1823
1824         ret->extra_certs=NULL;
1825         ret->comp_methods=SSL_COMP_get_compression_methods();
1826
1827         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1828
1829 #ifndef OPENSSL_NO_TLSEXT
1830         ret->tlsext_servername_callback = 0;
1831         ret->tlsext_servername_arg = NULL;
1832         /* Setup RFC4507 ticket keys */
1833         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1834                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1835                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1836                 ret->options |= SSL_OP_NO_TICKET;
1837
1838         ret->tlsext_status_cb = 0;
1839         ret->tlsext_status_arg = NULL;
1840
1841 # ifndef OPENSSL_NO_NEXTPROTONEG
1842         ret->next_protos_advertised_cb = 0;
1843         ret->next_proto_select_cb = 0;
1844 # endif
1845 #endif
1846 #ifndef OPENSSL_NO_PSK
1847         ret->psk_identity_hint=NULL;
1848         ret->psk_client_callback=NULL;
1849         ret->psk_server_callback=NULL;
1850 #endif
1851 #ifndef OPENSSL_NO_SRP
1852         SSL_CTX_SRP_CTX_init(ret);
1853 #endif
1854 #ifndef OPENSSL_NO_BUF_FREELISTS
1855         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1856         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1857         if (!ret->rbuf_freelist)
1858                 goto err;
1859         ret->rbuf_freelist->chunklen = 0;
1860         ret->rbuf_freelist->len = 0;
1861         ret->rbuf_freelist->head = NULL;
1862         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1863         if (!ret->wbuf_freelist)
1864                 {
1865                 OPENSSL_free(ret->rbuf_freelist);
1866                 goto err;
1867                 }
1868         ret->wbuf_freelist->chunklen = 0;
1869         ret->wbuf_freelist->len = 0;
1870         ret->wbuf_freelist->head = NULL;
1871 #endif
1872 #ifndef OPENSSL_NO_ENGINE
1873         ret->client_cert_engine = NULL;
1874 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1875 #define eng_strx(x)     #x
1876 #define eng_str(x)      eng_strx(x)
1877         /* Use specific client engine automatically... ignore errors */
1878         {
1879         ENGINE *eng;
1880         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1881         if (!eng)
1882                 {
1883                 ERR_clear_error();
1884                 ENGINE_load_builtin_engines();
1885                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1886                 }
1887         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1888                 ERR_clear_error();
1889         }
1890 #endif
1891 #endif
1892         /* Default is to connect to non-RI servers. When RI is more widely
1893          * deployed might change this.
1894          */
1895         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1896
1897         return(ret);
1898 err:
1899         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1900 err2:
1901         if (ret != NULL) SSL_CTX_free(ret);
1902         return(NULL);
1903         }
1904
1905 #if 0
1906 static void SSL_COMP_free(SSL_COMP *comp)
1907     { OPENSSL_free(comp); }
1908 #endif
1909
1910 #ifndef OPENSSL_NO_BUF_FREELISTS
1911 static void
1912 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1913         {
1914         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1915         for (ent = list->head; ent; ent = next)
1916                 {
1917                 next = ent->next;
1918                 OPENSSL_free(ent);
1919                 }
1920         OPENSSL_free(list);
1921         }
1922 #endif
1923
1924 void SSL_CTX_free(SSL_CTX *a)
1925         {
1926         int i;
1927
1928         if (a == NULL) return;
1929
1930         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1931 #ifdef REF_PRINT
1932         REF_PRINT("SSL_CTX",a);
1933 #endif
1934         if (i > 0) return;
1935 #ifdef REF_CHECK
1936         if (i < 0)
1937                 {
1938                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1939                 abort(); /* ok */
1940                 }
1941 #endif
1942
1943         if (a->param)
1944                 X509_VERIFY_PARAM_free(a->param);
1945
1946         /*
1947          * Free internal session cache. However: the remove_cb() may reference
1948          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1949          * after the sessions were flushed.
1950          * As the ex_data handling routines might also touch the session cache,
1951          * the most secure solution seems to be: empty (flush) the cache, then
1952          * free ex_data, then finally free the cache.
1953          * (See ticket [openssl.org #212].)
1954          */
1955         if (a->sessions != NULL)
1956                 SSL_CTX_flush_sessions(a,0);
1957
1958         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1959
1960         if (a->sessions != NULL)
1961                 lh_SSL_SESSION_free(a->sessions);
1962
1963         if (a->cert_store != NULL)
1964                 X509_STORE_free(a->cert_store);
1965         if (a->cipher_list != NULL)
1966                 sk_SSL_CIPHER_free(a->cipher_list);
1967         if (a->cipher_list_by_id != NULL)
1968                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1969         if (a->cert != NULL)
1970                 ssl_cert_free(a->cert);
1971         if (a->client_CA != NULL)
1972                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1973         if (a->extra_certs != NULL)
1974                 sk_X509_pop_free(a->extra_certs,X509_free);
1975 #if 0 /* This should never be done, since it removes a global database */
1976         if (a->comp_methods != NULL)
1977                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1978 #else
1979         a->comp_methods = NULL;
1980 #endif
1981
1982         if (a->srtp_profiles)
1983                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1984
1985 #ifndef OPENSSL_NO_PSK
1986         if (a->psk_identity_hint)
1987                 OPENSSL_free(a->psk_identity_hint);
1988 #endif
1989 #ifndef OPENSSL_NO_SRP
1990         SSL_CTX_SRP_CTX_free(a);
1991 #endif
1992 #ifndef OPENSSL_NO_ENGINE
1993         if (a->client_cert_engine)
1994                 ENGINE_finish(a->client_cert_engine);
1995 #endif
1996
1997 #ifndef OPENSSL_NO_BUF_FREELISTS
1998         if (a->wbuf_freelist)
1999                 ssl_buf_freelist_free(a->wbuf_freelist);
2000         if (a->rbuf_freelist)
2001                 ssl_buf_freelist_free(a->rbuf_freelist);
2002 #endif
2003 #ifndef OPENSSL_NO_TLSEXT
2004 # ifndef OPENSSL_NO_EC
2005         if (a->tlsext_ecpointformatlist)
2006                 OPENSSL_free(a->tlsext_ecpointformatlist);
2007         if (a->tlsext_ellipticcurvelist)
2008                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2009 # endif /* OPENSSL_NO_EC */
2010 #endif
2011
2012         OPENSSL_free(a);
2013         }
2014
2015 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2016         {
2017         ctx->default_passwd_callback=cb;
2018         }
2019
2020 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2021         {
2022         ctx->default_passwd_callback_userdata=u;
2023         }
2024
2025 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2026         {
2027         ctx->app_verify_callback=cb;
2028         ctx->app_verify_arg=arg;
2029         }
2030
2031 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2032         {
2033         ctx->verify_mode=mode;
2034         ctx->default_verify_callback=cb;
2035         }
2036
2037 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2038         {
2039         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2040         }
2041
2042 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2043         {
2044         CERT_PKEY *cpk;
2045         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2046         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2047         int rsa_tmp_export,dh_tmp_export,kl;
2048         unsigned long mask_k,mask_a,emask_k,emask_a;
2049         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2050 #ifndef OPENSSL_NO_ECDH
2051         int have_ecdh_tmp;
2052 #endif
2053         X509 *x = NULL;
2054         EVP_PKEY *ecc_pkey = NULL;
2055         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2056
2057         if (c == NULL) return;
2058
2059         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2060
2061 #ifndef OPENSSL_NO_RSA
2062         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2063         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2064                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2065 #else
2066         rsa_tmp=rsa_tmp_export=0;
2067 #endif
2068 #ifndef OPENSSL_NO_DH
2069         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2070         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2071                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2072 #else
2073         dh_tmp=dh_tmp_export=0;
2074 #endif
2075
2076 #ifndef OPENSSL_NO_ECDH
2077         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2078 #endif
2079         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2080         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2081         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2082         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2083         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2084         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2085         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2086         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2087         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2088         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2089         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2090 /* FIX THIS EAY EAY EAY */
2091         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2092         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2093         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2094         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2095         mask_k=0;
2096         mask_a=0;
2097         emask_k=0;
2098         emask_a=0;
2099
2100
2101
2102 #ifdef CIPHER_DEBUG
2103         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2104                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2105                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2106 #endif
2107
2108         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2109         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2110                 mask_k |= SSL_kGOST;
2111                 mask_a |= SSL_aGOST01;
2112         }
2113         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2114         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2115                 mask_k |= SSL_kGOST;
2116                 mask_a |= SSL_aGOST94;
2117         }
2118
2119         if (rsa_enc || (rsa_tmp && rsa_sign))
2120                 mask_k|=SSL_kRSA;
2121         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2122                 emask_k|=SSL_kRSA;
2123
2124 #if 0
2125         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2126         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2127                 (rsa_enc || rsa_sign || dsa_sign))
2128                 mask_k|=SSL_kEDH;
2129         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2130                 (rsa_enc || rsa_sign || dsa_sign))
2131                 emask_k|=SSL_kEDH;
2132 #endif
2133
2134         if (dh_tmp_export)
2135                 emask_k|=SSL_kEDH;
2136
2137         if (dh_tmp)
2138                 mask_k|=SSL_kEDH;
2139
2140         if (dh_rsa) mask_k|=SSL_kDHr;
2141         if (dh_rsa_export) emask_k|=SSL_kDHr;
2142
2143         if (dh_dsa) mask_k|=SSL_kDHd;
2144         if (dh_dsa_export) emask_k|=SSL_kDHd;
2145
2146         if (emask_k & (SSL_kDHr|SSL_kDHd))
2147                 mask_a |= SSL_aDH;
2148
2149         if (rsa_enc || rsa_sign)
2150                 {
2151                 mask_a|=SSL_aRSA;
2152                 emask_a|=SSL_aRSA;
2153                 }
2154
2155         if (dsa_sign)
2156                 {
2157                 mask_a|=SSL_aDSS;
2158                 emask_a|=SSL_aDSS;
2159                 }
2160
2161         mask_a|=SSL_aNULL;
2162         emask_a|=SSL_aNULL;
2163
2164 #ifndef OPENSSL_NO_KRB5
2165         mask_k|=SSL_kKRB5;
2166         mask_a|=SSL_aKRB5;
2167         emask_k|=SSL_kKRB5;
2168         emask_a|=SSL_aKRB5;
2169 #endif
2170
2171         /* An ECC certificate may be usable for ECDH and/or
2172          * ECDSA cipher suites depending on the key usage extension.
2173          */
2174         if (have_ecc_cert)
2175                 {
2176                 /* This call populates extension flags (ex_flags) */
2177                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2178                 X509_check_purpose(x, -1, 0);
2179                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2180                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2181                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2182                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2183                 ecc_pkey = X509_get_pubkey(x);
2184                 ecc_pkey_size = (ecc_pkey != NULL) ?
2185                     EVP_PKEY_bits(ecc_pkey) : 0;
2186                 EVP_PKEY_free(ecc_pkey);
2187                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2188                         {
2189                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2190                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2191                         }
2192 #ifndef OPENSSL_NO_ECDH
2193                 if (ecdh_ok)
2194                         {
2195
2196                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2197                                 {
2198                                 mask_k|=SSL_kECDHr;
2199                                 mask_a|=SSL_aECDH;
2200                                 if (ecc_pkey_size <= 163)
2201                                         {
2202                                         emask_k|=SSL_kECDHr;
2203                                         emask_a|=SSL_aECDH;
2204                                         }
2205                                 }
2206
2207                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2208                                 {
2209                                 mask_k|=SSL_kECDHe;
2210                                 mask_a|=SSL_aECDH;
2211                                 if (ecc_pkey_size <= 163)
2212                                         {
2213                                         emask_k|=SSL_kECDHe;
2214                                         emask_a|=SSL_aECDH;
2215                                         }
2216                                 }
2217                         }
2218 #endif
2219 #ifndef OPENSSL_NO_ECDSA
2220                 if (ecdsa_ok)
2221                         {
2222                         mask_a|=SSL_aECDSA;
2223                         emask_a|=SSL_aECDSA;
2224                         }
2225 #endif
2226                 }
2227
2228 #ifndef OPENSSL_NO_ECDH
2229         if (have_ecdh_tmp)
2230                 {
2231                 mask_k|=SSL_kEECDH;
2232                 emask_k|=SSL_kEECDH;
2233                 }
2234 #endif
2235
2236 #ifndef OPENSSL_NO_PSK
2237         mask_k |= SSL_kPSK;
2238         mask_a |= SSL_aPSK;
2239         emask_k |= SSL_kPSK;
2240         emask_a |= SSL_aPSK;
2241 #endif
2242
2243         c->mask_k=mask_k;
2244         c->mask_a=mask_a;
2245         c->export_mask_k=emask_k;
2246         c->export_mask_a=emask_a;
2247         c->valid=1;
2248         }
2249
2250 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2251 #define ku_reject(x, usage) \
2252         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2253
2254 #ifndef OPENSSL_NO_EC
2255
2256 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2257         {
2258         unsigned long alg_k, alg_a;
2259         EVP_PKEY *pkey = NULL;
2260         int keysize = 0;
2261         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2262         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2263
2264         alg_k = cs->algorithm_mkey;
2265         alg_a = cs->algorithm_auth;
2266
2267         if (SSL_C_IS_EXPORT(cs))
2268                 {
2269                 /* ECDH key length in export ciphers must be <= 163 bits */
2270                 pkey = X509_get_pubkey(x);
2271                 if (pkey == NULL) return 0;
2272                 keysize = EVP_PKEY_bits(pkey);
2273                 EVP_PKEY_free(pkey);
2274                 if (keysize > 163) return 0;
2275                 }
2276
2277         /* This call populates the ex_flags field correctly */
2278         X509_check_purpose(x, -1, 0);
2279         if ((x->sig_alg) && (x->sig_alg->algorithm))
2280                 {
2281                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2282                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2283                 }
2284         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2285                 {
2286                 /* key usage, if present, must allow key agreement */
2287                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2288                         {
2289                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2290                         return 0;
2291                         }
2292                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2293                         {
2294                         /* signature alg must be ECDSA */
2295                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2296                                 {
2297                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2298                                 return 0;
2299                                 }
2300                         }
2301                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2302                         {
2303                         /* signature alg must be RSA */
2304
2305                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2306                                 {
2307                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2308                                 return 0;
2309                                 }
2310                         }
2311                 }
2312         if (alg_a & SSL_aECDSA)
2313                 {
2314                 /* key usage, if present, must allow signing */
2315                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2316                         {
2317                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2318                         return 0;
2319                         }
2320                 }
2321
2322         return 1;  /* all checks are ok */
2323         }
2324
2325 #endif
2326
2327 /* THIS NEEDS CLEANING UP */
2328 static int ssl_get_server_cert_index(const SSL *s)
2329         {
2330         unsigned long alg_k, alg_a;
2331
2332         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2333         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2334
2335         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2336                 {
2337                 /* we don't need to look at SSL_kEECDH
2338                  * since no certificate is needed for
2339                  * anon ECDH and for authenticated
2340                  * EECDH, the check for the auth
2341                  * algorithm will set i correctly
2342                  * NOTE: For ECDH-RSA, we need an ECC
2343                  * not an RSA cert but for EECDH-RSA
2344                  * we need an RSA cert. Placing the
2345                  * checks for SSL_kECDH before RSA
2346                  * checks ensures the correct cert is chosen.
2347                  */
2348                 return SSL_PKEY_ECC;
2349                 }
2350         else if (alg_a & SSL_aECDSA)
2351                 return SSL_PKEY_ECC;
2352         else if (alg_k & SSL_kDHr)
2353                 return SSL_PKEY_DH_RSA;
2354         else if (alg_k & SSL_kDHd)
2355                 return SSL_PKEY_DH_DSA;
2356         else if (alg_a & SSL_aDSS)
2357                 return SSL_PKEY_DSA_SIGN;
2358         else if (alg_a & SSL_aRSA)
2359                 {
2360                 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2361                         return SSL_PKEY_RSA_SIGN;
2362                 else
2363                         return SSL_PKEY_RSA_ENC;
2364                 }
2365         else if (alg_a & SSL_aKRB5)
2366                 /* VRS something else here? */
2367                 return -1;
2368         else if (alg_a & SSL_aGOST94)
2369                 return SSL_PKEY_GOST94;
2370         else if (alg_a & SSL_aGOST01)
2371                 return SSL_PKEY_GOST01;
2372         else /* if (alg_a & SSL_aNULL) */
2373                 {
2374                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2375                 return -1;
2376                 }
2377         }
2378
2379 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2380         {
2381         CERT *c;
2382         int i;
2383
2384         c = s->cert;
2385         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2386
2387         i = ssl_get_server_cert_index(s);
2388
2389         /* This may or may not be an error. */
2390         if (i < 0)
2391                 return NULL;
2392
2393         /* May be NULL. */
2394         return &c->pkeys[i];
2395         }
2396
2397 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2398         {
2399         unsigned long alg_a;
2400         CERT *c;
2401         int idx = -1;
2402
2403         alg_a = cipher->algorithm_auth;
2404         c=s->cert;
2405
2406         if ((alg_a & SSL_aDSS) &&
2407                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2408                 idx = SSL_PKEY_DSA_SIGN;
2409         else if (alg_a & SSL_aRSA)
2410                 {
2411                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2412                         idx = SSL_PKEY_RSA_SIGN;
2413                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2414                         idx = SSL_PKEY_RSA_ENC;
2415                 }
2416         else if ((alg_a & SSL_aECDSA) &&
2417                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2418                 idx = SSL_PKEY_ECC;
2419         if (idx == -1)
2420                 {
2421                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2422                 return(NULL);
2423                 }
2424         if (pmd)
2425                 *pmd = c->pkeys[idx].digest;
2426         return c->pkeys[idx].privatekey;
2427         }
2428
2429 #ifndef OPENSSL_NO_TLSEXT
2430 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2431         {
2432         CERT *c;
2433         int i;
2434
2435         c = s->cert;
2436         i = ssl_get_server_cert_index(s);
2437
2438         if (i == -1)
2439                 return NULL;
2440
2441         *authz_length = 0;
2442         if (c->pkeys[i].authz == NULL)
2443                 return(NULL);
2444         *authz_length = c->pkeys[i].authz_length;
2445
2446         return c->pkeys[i].authz;
2447         }
2448 #endif
2449
2450 void ssl_update_cache(SSL *s,int mode)
2451         {
2452         int i;
2453
2454         /* If the session_id_length is 0, we are not supposed to cache it,
2455          * and it would be rather hard to do anyway :-) */
2456         if (s->session->session_id_length == 0) return;
2457
2458         i=s->session_ctx->session_cache_mode;
2459         if ((i & mode) && (!s->hit)
2460                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2461                     || SSL_CTX_add_session(s->session_ctx,s->session))
2462                 && (s->session_ctx->new_session_cb != NULL))
2463                 {
2464                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2465                 if (!s->session_ctx->new_session_cb(s,s->session))
2466                         SSL_SESSION_free(s->session);
2467                 }
2468
2469         /* auto flush every 255 connections */
2470         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2471                 ((i & mode) == mode))
2472                 {
2473                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2474                         ?s->session_ctx->stats.sess_connect_good
2475                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2476                         {
2477                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2478                         }
2479                 }
2480         }
2481
2482 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2483         {
2484         return(s->method);
2485         }
2486
2487 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2488         {
2489         int conn= -1;
2490         int ret=1;
2491
2492         if (s->method != meth)
2493                 {
2494                 if (s->handshake_func != NULL)
2495                         conn=(s->handshake_func == s->method->ssl_connect);
2496
2497                 if (s->method->version == meth->version)
2498                         s->method=meth;
2499                 else
2500                         {
2501                         s->method->ssl_free(s);
2502                         s->method=meth;
2503                         ret=s->method->ssl_new(s);
2504                         }
2505
2506                 if (conn == 1)
2507                         s->handshake_func=meth->ssl_connect;
2508                 else if (conn == 0)
2509                         s->handshake_func=meth->ssl_accept;
2510                 }
2511         return(ret);
2512         }
2513
2514 int SSL_get_error(const SSL *s,int i)
2515         {
2516         int reason;
2517         unsigned long l;
2518         BIO *bio;
2519
2520         if (i > 0) return(SSL_ERROR_NONE);
2521
2522         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2523          * etc, where we do encode the error */
2524         if ((l=ERR_peek_error()) != 0)
2525                 {
2526                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2527                         return(SSL_ERROR_SYSCALL);
2528                 else
2529                         return(SSL_ERROR_SSL);
2530                 }
2531
2532         if ((i < 0) && SSL_want_read(s))
2533                 {
2534                 bio=SSL_get_rbio(s);
2535                 if (BIO_should_read(bio))
2536                         return(SSL_ERROR_WANT_READ);
2537                 else if (BIO_should_write(bio))
2538                         /* This one doesn't make too much sense ... We never try
2539                          * to write to the rbio, and an application program where
2540                          * rbio and wbio are separate couldn't even know what it
2541                          * should wait for.
2542                          * However if we ever set s->rwstate incorrectly
2543                          * (so that we have SSL_want_read(s) instead of
2544                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2545                          * this test works around that bug; so it might be safer
2546                          * to keep it. */
2547                         return(SSL_ERROR_WANT_WRITE);
2548                 else if (BIO_should_io_special(bio))
2549                         {
2550                         reason=BIO_get_retry_reason(bio);
2551                         if (reason == BIO_RR_CONNECT)
2552                                 return(SSL_ERROR_WANT_CONNECT);
2553                         else if (reason == BIO_RR_ACCEPT)
2554                                 return(SSL_ERROR_WANT_ACCEPT);
2555                         else
2556                                 return(SSL_ERROR_SYSCALL); /* unknown */
2557                         }
2558                 }
2559
2560         if ((i < 0) && SSL_want_write(s))
2561                 {
2562                 bio=SSL_get_wbio(s);
2563                 if (BIO_should_write(bio))
2564                         return(SSL_ERROR_WANT_WRITE);
2565                 else if (BIO_should_read(bio))
2566                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2567                         return(SSL_ERROR_WANT_READ);
2568                 else if (BIO_should_io_special(bio))
2569                         {
2570                         reason=BIO_get_retry_reason(bio);
2571                         if (reason == BIO_RR_CONNECT)
2572                                 return(SSL_ERROR_WANT_CONNECT);
2573                         else if (reason == BIO_RR_ACCEPT)
2574                                 return(SSL_ERROR_WANT_ACCEPT);
2575                         else
2576                                 return(SSL_ERROR_SYSCALL);
2577                         }
2578                 }
2579         if ((i < 0) && SSL_want_x509_lookup(s))
2580                 {
2581                 return(SSL_ERROR_WANT_X509_LOOKUP);
2582                 }
2583
2584         if (i == 0)
2585                 {
2586                 if (s->version == SSL2_VERSION)
2587                         {
2588                         /* assume it is the socket being closed */
2589                         return(SSL_ERROR_ZERO_RETURN);
2590                         }
2591                 else
2592                         {
2593                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2594                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2595                                 return(SSL_ERROR_ZERO_RETURN);
2596                         }
2597                 }
2598         return(SSL_ERROR_SYSCALL);
2599         }
2600
2601 int SSL_do_handshake(SSL *s)
2602         {
2603         int ret=1;
2604
2605         if (s->handshake_func == NULL)
2606                 {
2607                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2608                 return(-1);
2609                 }
2610
2611         s->method->ssl_renegotiate_check(s);
2612
2613         if (SSL_in_init(s) || SSL_in_before(s))
2614                 {
2615                 ret=s->handshake_func(s);
2616                 }
2617         return(ret);
2618         }
2619
2620 /* For the next 2 functions, SSL_clear() sets shutdown and so
2621  * one of these calls will reset it */
2622 void SSL_set_accept_state(SSL *s)
2623         {
2624         s->server=1;
2625         s->shutdown=0;
2626         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2627         s->handshake_func=s->method->ssl_accept;
2628         /* clear the current cipher */
2629         ssl_clear_cipher_ctx(s);
2630         ssl_clear_hash_ctx(&s->read_hash);
2631         ssl_clear_hash_ctx(&s->write_hash);
2632         }
2633
2634 void SSL_set_connect_state(SSL *s)
2635         {
2636         s->server=0;
2637         s->shutdown=0;
2638         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2639         s->handshake_func=s->method->ssl_connect;
2640         /* clear the current cipher */
2641         ssl_clear_cipher_ctx(s);
2642         ssl_clear_hash_ctx(&s->read_hash);
2643         ssl_clear_hash_ctx(&s->write_hash);
2644         }
2645
2646 int ssl_undefined_function(SSL *s)
2647         {
2648         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2649         return(0);
2650         }
2651
2652 int ssl_undefined_void_function(void)
2653         {
2654         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2655         return(0);
2656         }
2657
2658 int ssl_undefined_const_function(const SSL *s)
2659         {
2660         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2661         return(0);
2662         }
2663
2664 SSL_METHOD *ssl_bad_method(int ver)
2665         {
2666         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2667         return(NULL);
2668         }
2669
2670 const char *SSL_get_version(const SSL *s)
2671         {
2672         if (s->version == TLS1_2_VERSION)
2673                 return("TLSv1.2");
2674         else if (s->version == TLS1_1_VERSION)
2675                 return("TLSv1.1");
2676         else if (s->version == TLS1_VERSION)
2677                 return("TLSv1");
2678         else if (s->version == SSL3_VERSION)
2679                 return("SSLv3");
2680         else if (s->version == SSL2_VERSION)
2681                 return("SSLv2");
2682         else
2683                 return("unknown");
2684         }
2685
2686 SSL *SSL_dup(SSL *s)
2687         {
2688         STACK_OF(X509_NAME) *sk;
2689         X509_NAME *xn;
2690         SSL *ret;
2691         int i;
2692
2693         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2694             return(NULL);
2695
2696         ret->version = s->version;
2697         ret->type = s->type;
2698         ret->method = s->method;
2699
2700         if (s->session != NULL)
2701                 {
2702                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2703                 SSL_copy_session_id(ret,s);
2704                 }
2705         else
2706                 {
2707                 /* No session has been established yet, so we have to expect
2708                  * that s->cert or ret->cert will be changed later --
2709                  * they should not both point to the same object,
2710                  * and thus we can't use SSL_copy_session_id. */
2711
2712                 ret->method->ssl_free(ret);
2713                 ret->method = s->method;
2714                 ret->method->ssl_new(ret);
2715
2716                 if (s->cert != NULL)
2717                         {
2718                         if (ret->cert != NULL)
2719                                 {
2720                                 ssl_cert_free(ret->cert);
2721                                 }
2722                         ret->cert = ssl_cert_dup(s->cert);
2723                         if (ret->cert == NULL)
2724                                 goto err;
2725                         }
2726
2727                 SSL_set_session_id_context(ret,
2728                         s->sid_ctx, s->sid_ctx_length);
2729                 }
2730
2731         ret->options=s->options;
2732         ret->mode=s->mode;
2733         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2734         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2735         ret->msg_callback = s->msg_callback;
2736         ret->msg_callback_arg = s->msg_callback_arg;
2737         SSL_set_verify(ret,SSL_get_verify_mode(s),
2738                 SSL_get_verify_callback(s));
2739         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2740         ret->generate_session_id = s->generate_session_id;
2741
2742         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2743
2744         ret->debug=s->debug;
2745
2746         /* copy app data, a little dangerous perhaps */
2747         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2748                 goto err;
2749
2750         /* setup rbio, and wbio */
2751         if (s->rbio != NULL)
2752                 {
2753                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2754                         goto err;
2755                 }
2756         if (s->wbio != NULL)
2757                 {
2758                 if (s->wbio != s->rbio)
2759                         {
2760                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2761                                 goto err;
2762                         }
2763                 else
2764                         ret->wbio=ret->rbio;
2765                 }
2766         ret->rwstate = s->rwstate;
2767         ret->in_handshake = s->in_handshake;
2768         ret->handshake_func = s->handshake_func;
2769         ret->server = s->server;
2770         ret->renegotiate = s->renegotiate;
2771         ret->new_session = s->new_session;
2772         ret->quiet_shutdown = s->quiet_shutdown;
2773         ret->shutdown=s->shutdown;
2774         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2775         ret->rstate=s->rstate;
2776         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2777         ret->hit=s->hit;
2778
2779         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2780
2781         /* dup the cipher_list and cipher_list_by_id stacks */
2782         if (s->cipher_list != NULL)
2783                 {
2784                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2785                         goto err;
2786                 }
2787         if (s->cipher_list_by_id != NULL)
2788                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2789                         == NULL)
2790                         goto err;
2791
2792         /* Dup the client_CA list */
2793         if (s->client_CA != NULL)
2794                 {
2795                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2796                 ret->client_CA=sk;
2797                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2798                         {
2799                         xn=sk_X509_NAME_value(sk,i);
2800                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2801                                 {
2802                                 X509_NAME_free(xn);
2803                                 goto err;
2804                                 }
2805                         }
2806                 }
2807
2808         if (0)
2809                 {
2810 err:
2811                 if (ret != NULL) SSL_free(ret);
2812                 ret=NULL;
2813                 }
2814         return(ret);
2815         }
2816
2817 void ssl_clear_cipher_ctx(SSL *s)
2818         {
2819         if (s->enc_read_ctx != NULL)
2820                 {
2821                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2822                 OPENSSL_free(s->enc_read_ctx);
2823                 s->enc_read_ctx=NULL;
2824                 }
2825         if (s->enc_write_ctx != NULL)
2826                 {
2827                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2828                 OPENSSL_free(s->enc_write_ctx);
2829                 s->enc_write_ctx=NULL;
2830                 }
2831 #ifndef OPENSSL_NO_COMP
2832         if (s->expand != NULL)
2833                 {
2834                 COMP_CTX_free(s->expand);
2835                 s->expand=NULL;
2836                 }
2837         if (s->compress != NULL)
2838                 {
2839                 COMP_CTX_free(s->compress);
2840                 s->compress=NULL;
2841                 }
2842 #endif
2843         }
2844
2845 /* Fix this function so that it takes an optional type parameter */
2846 X509 *SSL_get_certificate(const SSL *s)
2847         {
2848         if (s->cert != NULL)
2849                 return(s->cert->key->x509);
2850         else
2851                 return(NULL);
2852         }
2853
2854 /* Fix this function so that it takes an optional type parameter */
2855 EVP_PKEY *SSL_get_privatekey(SSL *s)
2856         {
2857         if (s->cert != NULL)
2858                 return(s->cert->key->privatekey);
2859         else
2860                 return(NULL);
2861         }
2862
2863 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2864         {
2865         if ((s->session != NULL) && (s->session->cipher != NULL))
2866                 return(s->session->cipher);
2867         return(NULL);
2868         }
2869 #ifdef OPENSSL_NO_COMP
2870 const void *SSL_get_current_compression(SSL *s)
2871         {
2872         return NULL;
2873         }
2874 const void *SSL_get_current_expansion(SSL *s)
2875         {
2876         return NULL;
2877         }
2878 #else
2879
2880 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2881         {
2882         if (s->compress != NULL)
2883                 return(s->compress->meth);
2884         return(NULL);
2885         }
2886
2887 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2888         {
2889         if (s->expand != NULL)
2890                 return(s->expand->meth);
2891         return(NULL);
2892         }
2893 #endif
2894
2895 int ssl_init_wbio_buffer(SSL *s,int push)
2896         {
2897         BIO *bbio;
2898
2899         if (s->bbio == NULL)
2900                 {
2901                 bbio=BIO_new(BIO_f_buffer());
2902                 if (bbio == NULL) return(0);
2903                 s->bbio=bbio;
2904                 }
2905         else
2906                 {
2907                 bbio=s->bbio;
2908                 if (s->bbio == s->wbio)
2909                         s->wbio=BIO_pop(s->wbio);
2910                 }
2911         (void)BIO_reset(bbio);
2912 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2913         if (!BIO_set_read_buffer_size(bbio,1))
2914                 {
2915                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2916                 return(0);
2917                 }
2918         if (push)
2919                 {
2920                 if (s->wbio != bbio)
2921                         s->wbio=BIO_push(bbio,s->wbio);
2922                 }
2923         else
2924                 {
2925                 if (s->wbio == bbio)
2926                         s->wbio=BIO_pop(bbio);
2927                 }
2928         return(1);
2929         }
2930
2931 void ssl_free_wbio_buffer(SSL *s)
2932         {
2933         if (s->bbio == NULL) return;
2934
2935         if (s->bbio == s->wbio)
2936                 {
2937                 /* remove buffering */
2938                 s->wbio=BIO_pop(s->wbio);
2939 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2940                 assert(s->wbio != NULL);
2941 #endif
2942         }
2943         BIO_free(s->bbio);
2944         s->bbio=NULL;
2945         }
2946
2947 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2948         {
2949         ctx->quiet_shutdown=mode;
2950         }
2951
2952 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2953         {
2954         return(ctx->quiet_shutdown);
2955         }
2956
2957 void SSL_set_quiet_shutdown(SSL *s,int mode)
2958         {
2959         s->quiet_shutdown=mode;
2960         }
2961
2962 int SSL_get_quiet_shutdown(const SSL *s)
2963         {
2964         return(s->quiet_shutdown);
2965         }
2966
2967 void SSL_set_shutdown(SSL *s,int mode)
2968         {
2969         s->shutdown=mode;
2970         }
2971
2972 int SSL_get_shutdown(const SSL *s)
2973         {
2974         return(s->shutdown);
2975         }
2976
2977 int SSL_version(const SSL *s)
2978         {
2979         return(s->version);
2980         }
2981
2982 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2983         {
2984         return(ssl->ctx);
2985         }
2986
2987 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2988         {
2989         if (ssl->ctx == ctx)
2990                 return ssl->ctx;
2991 #ifndef OPENSSL_NO_TLSEXT
2992         if (ctx == NULL)
2993                 ctx = ssl->initial_ctx;
2994 #endif
2995         if (ssl->cert != NULL)
2996                 ssl_cert_free(ssl->cert);
2997         ssl->cert = ssl_cert_dup(ctx->cert);
2998         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2999         if (ssl->ctx != NULL)
3000                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3001         ssl->ctx = ctx;
3002         return(ssl->ctx);
3003         }
3004
3005 #ifndef OPENSSL_NO_STDIO
3006 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3007         {
3008         return(X509_STORE_set_default_paths(ctx->cert_store));
3009         }
3010
3011 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3012                 const char *CApath)
3013         {
3014         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3015         }
3016 #endif
3017
3018 void SSL_set_info_callback(SSL *ssl,
3019         void (*cb)(const SSL *ssl,int type,int val))
3020         {
3021         ssl->info_callback=cb;
3022         }
3023
3024 /* One compiler (Diab DCC) doesn't like argument names in returned
3025    function pointer.  */
3026 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3027         {
3028         return ssl->info_callback;
3029         }
3030
3031 int SSL_state(const SSL *ssl)
3032         {
3033         return(ssl->state);
3034         }
3035
3036 void SSL_set_state(SSL *ssl, int state)
3037         {
3038         ssl->state = state;
3039         }
3040
3041 void SSL_set_verify_result(SSL *ssl,long arg)
3042         {
3043         ssl->verify_result=arg;
3044         }
3045
3046 long SSL_get_verify_result(const SSL *ssl)
3047         {
3048         return(ssl->verify_result);
3049         }
3050
3051 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3052                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3053         {
3054         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3055                                 new_func, dup_func, free_func);
3056         }
3057
3058 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3059         {
3060         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3061         }
3062
3063 void *SSL_get_ex_data(const SSL *s,int idx)
3064         {
3065         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3066         }
3067
3068 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3069                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3070         {
3071         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3072                                 new_func, dup_func, free_func);
3073         }
3074
3075 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3076         {
3077         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3078         }
3079
3080 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3081         {
3082         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3083         }
3084
3085 int ssl_ok(SSL *s)
3086         {
3087         return(1);
3088         }
3089
3090 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3091         {
3092         return(ctx->cert_store);
3093         }
3094
3095 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3096         {
3097         if (ctx->cert_store != NULL)
3098                 X509_STORE_free(ctx->cert_store);
3099         ctx->cert_store=store;
3100         }
3101
3102 int SSL_want(const SSL *s)
3103         {
3104         return(s->rwstate);
3105         }
3106
3107 /*!
3108  * \brief Set the callback for generating temporary RSA keys.
3109  * \param ctx the SSL context.
3110  * \param cb the callback
3111  */
3112
3113 #ifndef OPENSSL_NO_RSA
3114 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3115                                                           int is_export,
3116                                                           int keylength))
3117     {
3118     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3119     }
3120
3121 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3122                                                   int is_export,
3123                                                   int keylength))
3124     {
3125     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3126     }
3127 #endif
3128
3129 #ifdef DOXYGEN
3130 /*!
3131  * \brief The RSA temporary key callback function.
3132  * \param ssl the SSL session.
3133  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3134  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3135  * of the required key in bits.
3136  * \return the temporary RSA key.
3137  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3138  */
3139
3140 RSA *cb(SSL *ssl,int is_export,int keylength)
3141     {}
3142 #endif
3143
3144 /*!
3145  * \brief Set the callback for generating temporary DH keys.
3146  * \param ctx the SSL context.
3147  * \param dh the callback
3148  */
3149
3150 #ifndef OPENSSL_NO_DH
3151 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3152                                                         int keylength))
3153         {
3154         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3155         }
3156
3157 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3158                                                 int keylength))
3159         {
3160         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3161         }
3162 #endif
3163
3164 #ifndef OPENSSL_NO_ECDH
3165 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3166                                                                 int keylength))
3167         {
3168         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3169         }
3170
3171 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3172                                                         int keylength))
3173         {
3174         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3175         }
3176 #endif
3177
3178 #ifndef OPENSSL_NO_PSK
3179 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3180         {
3181         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3182                 {
3183                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3184                 return 0;
3185                 }
3186         if (ctx->psk_identity_hint != NULL)
3187                 OPENSSL_free(ctx->psk_identity_hint);
3188         if (identity_hint != NULL)
3189                 {
3190                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3191                 if (ctx->psk_identity_hint == NULL)
3192                         return 0;
3193                 }
3194         else
3195                 ctx->psk_identity_hint = NULL;
3196         return 1;
3197         }
3198
3199 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3200         {
3201         if (s == NULL)
3202                 return 0;
3203
3204         if (s->session == NULL)
3205                 return 1; /* session not created yet, ignored */
3206
3207         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3208                 {
3209                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3210                 return 0;
3211                 }
3212         if (s->session->psk_identity_hint != NULL)
3213                 OPENSSL_free(s->session->psk_identity_hint);
3214         if (identity_hint != NULL)
3215                 {
3216                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3217                 if (s->session->psk_identity_hint == NULL)
3218                         return 0;
3219                 }
3220         else
3221                 s->session->psk_identity_hint = NULL;
3222         return 1;
3223         }
3224
3225 const char *SSL_get_psk_identity_hint(const SSL *s)
3226         {
3227         if (s == NULL || s->session == NULL)
3228                 return NULL;
3229         return(s->session->psk_identity_hint);
3230         }
3231
3232 const char *SSL_get_psk_identity(const SSL *s)
3233         {
3234         if (s == NULL || s->session == NULL)
3235                 return NULL;
3236         return(s->session->psk_identity);
3237         }
3238
3239 void SSL_set_psk_client_callback(SSL *s,
3240     unsigned int (*cb)(SSL *ssl, const char *hint,
3241                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3242                        unsigned int max_psk_len))
3243         {
3244         s->psk_client_callback = cb;
3245         }
3246
3247 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3248     unsigned int (*cb)(SSL *ssl, const char *hint,
3249                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3250                        unsigned int max_psk_len))
3251         {
3252         ctx->psk_client_callback = cb;
3253         }
3254
3255 void SSL_set_psk_server_callback(SSL *s,
3256     unsigned int (*cb)(SSL *ssl, const char *identity,
3257                        unsigned char *psk, unsigned int max_psk_len))
3258         {
3259         s->psk_server_callback = cb;
3260         }
3261
3262 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3263     unsigned int (*cb)(SSL *ssl, const char *identity,
3264                        unsigned char *psk, unsigned int max_psk_len))
3265         {
3266         ctx->psk_server_callback = cb;
3267         }
3268 #endif
3269
3270 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))
3271         {
3272         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3273         }
3274 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))
3275         {
3276         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3277         }
3278
3279 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3280  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3281  * any. If EVP_MD pointer is passed, initializes ctx with this md
3282  * Returns newly allocated ctx;
3283  */
3284
3285 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3286 {
3287         ssl_clear_hash_ctx(hash);
3288         *hash = EVP_MD_CTX_create();
3289         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3290         return *hash;
3291 }
3292 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3293 {
3294
3295         if (*hash) EVP_MD_CTX_destroy(*hash);
3296         *hash=NULL;
3297 }
3298
3299 void SSL_set_debug(SSL *s, int debug)
3300         {
3301         s->debug = debug;
3302         }
3303
3304 int SSL_cache_hit(SSL *s)
3305         {
3306         return s->hit;
3307         }
3308
3309 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3310 #include "../crypto/bio/bss_file.c"
3311 #endif
3312
3313 IMPLEMENT_STACK_OF(SSL_CIPHER)
3314 IMPLEMENT_STACK_OF(SSL_COMP)
3315 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3316                                     ssl_cipher_id);