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_NEXTPROTONEG
 360         s->next_proto_negotiated = NULL;
 361 # endif
 362 #endif
 363
 364         s->verify_result=X509_V_OK;
 365
 366         s->method=ctx->method;
 367
 368         if (!s->method->ssl_new(s))
 369                 goto err;
 370
 371         s->references=1;
 372         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 373
 374         SSL_clear(s);
 375
 376         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 377
 378 #ifndef OPENSSL_NO_PSK
 379         s->psk_client_callback=ctx->psk_client_callback;
 380         s->psk_server_callback=ctx->psk_server_callback;
 381 #endif
 382
 383         return(s);
 384 err:
 385         if (s != NULL)
 386                 {
 387                 if (s->cert != NULL)
 388                         ssl_cert_free(s->cert);
 389                 if (s->ctx != NULL)
 390                         SSL_CTX_free(s->ctx); /* decrement reference count */
 391                 OPENSSL_free(s);
 392                 }
 393         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 394         return(NULL);
 395         }
 396
 397 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 398                                    unsigned int sid_ctx_len)
 399     {
 400     if(sid_ctx_len > sizeof ctx->sid_ctx)
 401         {
 402         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 403         return 0;
 404         }
 405     ctx->sid_ctx_length=sid_ctx_len;
 406     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 407
 408     return 1;
 409     }
 410
 411 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 412                                unsigned int sid_ctx_len)
 413     {
 414     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 415         {
 416         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 417         return 0;
 418         }
 419     ssl->sid_ctx_length=sid_ctx_len;
 420     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 421
 422     return 1;
 423     }
 424
 425 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 426         {
 427         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 428         ctx->generate_session_id = cb;
 429         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 430         return 1;
 431         }
 432
 433 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 434         {
 435         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 436         ssl->generate_session_id = cb;
 437         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 438         return 1;
 439         }
 440
 441 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 442                                 unsigned int id_len)
 443         {
 444         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 445          * we can "construct" a session to give us the desired check - ie. to
 446          * find if there's a session in the hash table that would conflict with
 447          * any new session built out of this id/id_len and the ssl_version in
 448          * use by this SSL. */
 449         SSL_SESSION r, *p;
 450
 451         if(id_len > sizeof r.session_id)
 452                 return 0;
 453
 454         r.ssl_version = ssl->version;
 455         r.session_id_length = id_len;
 456         memcpy(r.session_id, id, id_len);
 457         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 458          * callback is calling us to check the uniqueness of a shorter ID, it
 459          * must be compared as a padded-out ID because that is what it will be
 460          * converted to when the callback has finished choosing it. */
 461         if((r.ssl_version == SSL2_VERSION) &&
 462                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 463                 {
 464                 memset(r.session_id + id_len, 0,
 465                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 466                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 467                 }
 468
 469         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 470         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 471         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 472         return (p != NULL);
 473         }
 474
 475 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 476         {
 477         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 478         }
 479
 480 int SSL_set_purpose(SSL *s, int purpose)
 481         {
 482         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 483         }
 484
 485 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 486         {
 487         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 488         }
 489
 490 int SSL_set_trust(SSL *s, int trust)
 491         {
 492         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 493         }
 494
 495 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 496         {
 497         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 498         }
 499
 500 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 501         {
 502         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 503         }
 504
 505 void SSL_free(SSL *s)
 506         {
 507         int i;
 508
 509         if(s == NULL)
 510             return;
 511
 512         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 513 #ifdef REF_PRINT
 514         REF_PRINT("SSL",s);
 515 #endif
 516         if (i > 0) return;
 517 #ifdef REF_CHECK
 518         if (i < 0)
 519                 {
 520                 fprintf(stderr,"SSL_free, bad reference count\n");
 521                 abort(); /* ok */
 522                 }
 523 #endif
 524
 525         if (s->param)
 526                 X509_VERIFY_PARAM_free(s->param);
 527
 528         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 529
 530         if (s->bbio != NULL)
 531                 {
 532                 /* If the buffering BIO is in place, pop it off */
 533                 if (s->bbio == s->wbio)
 534                         {
 535                         s->wbio=BIO_pop(s->wbio);
 536                         }
 537                 BIO_free(s->bbio);
 538                 s->bbio=NULL;
 539                 }
 540         if (s->rbio != NULL)
 541                 BIO_free_all(s->rbio);
 542         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 543                 BIO_free_all(s->wbio);
 544
 545         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 546
 547         /* add extra stuff */
 548         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 549         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 550
 551         /* Make the next call work :-) */
 552         if (s->session != NULL)
 553                 {
 554                 ssl_clear_bad_session(s);
 555                 SSL_SESSION_free(s->session);
 556                 }
 557
 558         ssl_clear_cipher_ctx(s);
 559         ssl_clear_hash_ctx(&s->read_hash);
 560         ssl_clear_hash_ctx(&s->write_hash);
 561
 562         if (s->cert != NULL) ssl_cert_free(s->cert);
 563         /* Free up if allocated */
 564
 565 #ifndef OPENSSL_NO_TLSEXT
 566         if (s->tlsext_hostname)
 567                 OPENSSL_free(s->tlsext_hostname);
 568         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 569 #ifndef OPENSSL_NO_EC
 570         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 571         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 572 #endif /* OPENSSL_NO_EC */
 573         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 574         if (s->tlsext_ocsp_exts)
 575                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 576                                                 X509_EXTENSION_free);
 577         if (s->tlsext_ocsp_ids)
 578                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 579         if (s->tlsext_ocsp_resp)
 580                 OPENSSL_free(s->tlsext_ocsp_resp);
 581 #endif
 582
 583         if (s->client_CA != NULL)
 584                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 585
 586         if (s->method != NULL) s->method->ssl_free(s);
 587
 588         if (s->ctx) SSL_CTX_free(s->ctx);
 589
 590 #ifndef OPENSSL_NO_KRB5
 591         if (s->kssl_ctx != NULL)
 592                 kssl_ctx_free(s->kssl_ctx);
 593 #endif  /* OPENSSL_NO_KRB5 */
 594
 595 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 596         if (s->next_proto_negotiated)
 597                 OPENSSL_free(s->next_proto_negotiated);
 598 #endif
 599
 600 #ifndef OPENSSL_NO_SRTP
 601         if (s->srtp_profiles)
 602             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 603 #endif
 604
 605         OPENSSL_free(s);
 606         }
 607
 608 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 609         {
 610         /* If the output buffering BIO is still in place, remove it
 611          */
 612         if (s->bbio != NULL)
 613                 {
 614                 if (s->wbio == s->bbio)
 615                         {
 616                         s->wbio=s->wbio->next_bio;
 617                         s->bbio->next_bio=NULL;
 618                         }
 619                 }
 620         if ((s->rbio != NULL) && (s->rbio != rbio))
 621                 BIO_free_all(s->rbio);
 622         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 623                 BIO_free_all(s->wbio);
 624         s->rbio=rbio;
 625         s->wbio=wbio;
 626         }
 627
 628 BIO *SSL_get_rbio(const SSL *s)
 629         { return(s->rbio); }
 630
 631 BIO *SSL_get_wbio(const SSL *s)
 632         { return(s->wbio); }
 633
 634 int SSL_get_fd(const SSL *s)
 635         {
 636         return(SSL_get_rfd(s));
 637         }
 638
 639 int SSL_get_rfd(const SSL *s)
 640         {
 641         int ret= -1;
 642         BIO *b,*r;
 643
 644         b=SSL_get_rbio(s);
 645         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 646         if (r != NULL)
 647                 BIO_get_fd(r,&ret);
 648         return(ret);
 649         }
 650
 651 int SSL_get_wfd(const SSL *s)
 652         {
 653         int ret= -1;
 654         BIO *b,*r;
 655
 656         b=SSL_get_wbio(s);
 657         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 658         if (r != NULL)
 659                 BIO_get_fd(r,&ret);
 660         return(ret);
 661         }
 662
 663 #ifndef OPENSSL_NO_SOCK
 664 int SSL_set_fd(SSL *s,int fd)
 665         {
 666         int ret=0;
 667         BIO *bio=NULL;
 668
 669         bio=BIO_new(BIO_s_socket());
 670
 671         if (bio == NULL)
 672                 {
 673                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 674                 goto err;
 675                 }
 676         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 677         SSL_set_bio(s,bio,bio);
 678         ret=1;
 679 err:
 680         return(ret);
 681         }
 682
 683 int SSL_set_wfd(SSL *s,int fd)
 684         {
 685         int ret=0;
 686         BIO *bio=NULL;
 687
 688         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 689                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 690                 {
 691                 bio=BIO_new(BIO_s_socket());
 692
 693                 if (bio == NULL)
 694                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 695                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 696                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 697                 }
 698         else
 699                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 700         ret=1;
 701 err:
 702         return(ret);
 703         }
 704
 705 int SSL_set_rfd(SSL *s,int fd)
 706         {
 707         int ret=0;
 708         BIO *bio=NULL;
 709
 710         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 711                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 712                 {
 713                 bio=BIO_new(BIO_s_socket());
 714
 715                 if (bio == NULL)
 716                         {
 717                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 718                         goto err;
 719                         }
 720                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 721                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 722                 }
 723         else
 724                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 725         ret=1;
 726 err:
 727         return(ret);
 728         }
 729 #endif
 730
 731
 732 /* return length of latest Finished message we sent, copy to 'buf' */
 733 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 734         {
 735         size_t ret = 0;
 736
 737         if (s->s3 != NULL)
 738                 {
 739                 ret = s->s3->tmp.finish_md_len;
 740                 if (count > ret)
 741                         count = ret;
 742                 memcpy(buf, s->s3->tmp.finish_md, count);
 743                 }
 744         return ret;
 745         }
 746
 747 /* return length of latest Finished message we expected, copy to 'buf' */
 748 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 749         {
 750         size_t ret = 0;
 751
 752         if (s->s3 != NULL)
 753                 {
 754                 ret = s->s3->tmp.peer_finish_md_len;
 755                 if (count > ret)
 756                         count = ret;
 757                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 758                 }
 759         return ret;
 760         }
 761
 762
 763 int SSL_get_verify_mode(const SSL *s)
 764         {
 765         return(s->verify_mode);
 766         }
 767
 768 int SSL_get_verify_depth(const SSL *s)
 769         {
 770         return X509_VERIFY_PARAM_get_depth(s->param);
 771         }
 772
 773 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 774         {
 775         return(s->verify_callback);
 776         }
 777
 778 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 779         {
 780         return(ctx->verify_mode);
 781         }
 782
 783 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 784         {
 785         return X509_VERIFY_PARAM_get_depth(ctx->param);
 786         }
 787
 788 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 789         {
 790         return(ctx->default_verify_callback);
 791         }
 792
 793 void SSL_set_verify(SSL *s,int mode,
 794                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 795         {
 796         s->verify_mode=mode;
 797         if (callback != NULL)
 798                 s->verify_callback=callback;
 799         }
 800
 801 void SSL_set_verify_depth(SSL *s,int depth)
 802         {
 803         X509_VERIFY_PARAM_set_depth(s->param, depth);
 804         }
 805
 806 void SSL_set_read_ahead(SSL *s,int yes)
 807         {
 808         s->read_ahead=yes;
 809         }
 810
 811 int SSL_get_read_ahead(const SSL *s)
 812         {
 813         return(s->read_ahead);
 814         }
 815
 816 int SSL_pending(const SSL *s)
 817         {
 818         /* SSL_pending cannot work properly if read-ahead is enabled
 819          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 820          * and it is impossible to fix since SSL_pending cannot report
 821          * errors that may be observed while scanning the new data.
 822          * (Note that SSL_pending() is often used as a boolean value,
 823          * so we'd better not return -1.)
 824          */
 825         return(s->method->ssl_pending(s));
 826         }
 827
 828 X509 *SSL_get_peer_certificate(const SSL *s)
 829         {
 830         X509 *r;
 831
 832         if ((s == NULL) || (s->session == NULL))
 833                 r=NULL;
 834         else
 835                 r=s->session->peer;
 836
 837         if (r == NULL) return(r);
 838
 839         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 840
 841         return(r);
 842         }
 843
 844 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 845         {
 846         STACK_OF(X509) *r;
 847
 848         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 849                 r=NULL;
 850         else
 851                 r=s->session->sess_cert->cert_chain;
 852
 853         /* If we are a client, cert_chain includes the peer's own
 854          * certificate; if we are a server, it does not. */
 855
 856         return(r);
 857         }
 858
 859 /* Now in theory, since the calling process own 't' it should be safe to
 860  * modify.  We need to be able to read f without being hassled */
 861 void SSL_copy_session_id(SSL *t,const SSL *f)
 862         {
 863         CERT *tmp;
 864
 865         /* Do we need to to SSL locking? */
 866         SSL_set_session(t,SSL_get_session(f));
 867
 868         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 869          * vice-versa */
 870         if (t->method != f->method)
 871                 {
 872                 t->method->ssl_free(t); /* cleanup current */
 873                 t->method=f->method;    /* change method */
 874                 t->method->ssl_new(t);  /* setup new */
 875                 }
 876
 877         tmp=t->cert;
 878         if (f->cert != NULL)
 879                 {
 880                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 881                 t->cert=f->cert;
 882                 }
 883         else
 884                 t->cert=NULL;
 885         if (tmp != NULL) ssl_cert_free(tmp);
 886         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 887         }
 888
 889 /* Fix this so it checks all the valid key/cert options */
 890 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 891         {
 892         if (    (ctx == NULL) ||
 893                 (ctx->cert == NULL) ||
 894                 (ctx->cert->key->x509 == NULL))
 895                 {
 896                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 897                 return(0);
 898                 }
 899         if      (ctx->cert->key->privatekey == NULL)
 900                 {
 901                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 902                 return(0);
 903                 }
 904         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 905         }
 906
 907 /* Fix this function so that it takes an optional type parameter */
 908 int SSL_check_private_key(const SSL *ssl)
 909         {
 910         if (ssl == NULL)
 911                 {
 912                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 913                 return(0);
 914                 }
 915         if (ssl->cert == NULL)
 916                 {
 917                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 918                 return 0;
 919                 }
 920         if (ssl->cert->key->x509 == NULL)
 921                 {
 922                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 923                 return(0);
 924                 }
 925         if (ssl->cert->key->privatekey == NULL)
 926                 {
 927                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 928                 return(0);
 929                 }
 930         return(X509_check_private_key(ssl->cert->key->x509,
 931                 ssl->cert->key->privatekey));
 932         }
 933
 934 int SSL_accept(SSL *s)
 935         {
 936         if (s->handshake_func == 0)
 937                 /* Not properly initialized yet */
 938                 SSL_set_accept_state(s);
 939
 940         return(s->method->ssl_accept(s));
 941         }
 942
 943 int SSL_connect(SSL *s)
 944         {
 945         if (s->handshake_func == 0)
 946                 /* Not properly initialized yet */
 947                 SSL_set_connect_state(s);
 948
 949         return(s->method->ssl_connect(s));
 950         }
 951
 952 long SSL_get_default_timeout(const SSL *s)
 953         {
 954         return(s->method->get_timeout());
 955         }
 956
 957 int SSL_read(SSL *s,void *buf,int num)
 958         {
 959         if (s->handshake_func == 0)
 960                 {
 961                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 962                 return -1;
 963                 }
 964
 965         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 966                 {
 967                 s->rwstate=SSL_NOTHING;
 968                 return(0);
 969                 }
 970         return(s->method->ssl_read(s,buf,num));
 971         }
 972
 973 int SSL_peek(SSL *s,void *buf,int num)
 974         {
 975         if (s->handshake_func == 0)
 976                 {
 977                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 978                 return -1;
 979                 }
 980
 981         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 982                 {
 983                 return(0);
 984                 }
 985         return(s->method->ssl_peek(s,buf,num));
 986         }
 987
 988 int SSL_write(SSL *s,const void *buf,int num)
 989         {
 990         if (s->handshake_func == 0)
 991                 {
 992                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 993                 return -1;
 994                 }
 995
 996         if (s->shutdown & SSL_SENT_SHUTDOWN)
 997                 {
 998                 s->rwstate=SSL_NOTHING;
 999                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1000                 return(-1);
1001                 }
1002         return(s->method->ssl_write(s,buf,num));
1003         }
1004
1005 int SSL_shutdown(SSL *s)
1006         {
1007         /* Note that this function behaves differently from what one might
1008          * expect.  Return values are 0 for no success (yet),
1009          * 1 for success; but calling it once is usually not enough,
1010          * even if blocking I/O is used (see ssl3_shutdown).
1011          */
1012
1013         if (s->handshake_func == 0)
1014                 {
1015                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1016                 return -1;
1017                 }
1018
1019         if ((s != NULL) && !SSL_in_init(s))
1020                 return(s->method->ssl_shutdown(s));
1021         else
1022                 return(1);
1023         }
1024
1025 int SSL_renegotiate(SSL *s)
1026         {
1027         if (s->renegotiate == 0)
1028                 s->renegotiate=1;
1029
1030         s->new_session=1;
1031
1032         return(s->method->ssl_renegotiate(s));
1033         }
1034
1035 int SSL_renegotiate_abbreviated(SSL *s)
1036         {
1037         if (s->renegotiate == 0)
1038                 s->renegotiate=1;
1039
1040         s->new_session=0;
1041
1042         return(s->method->ssl_renegotiate(s));
1043         }
1044
1045 int SSL_renegotiate_pending(SSL *s)
1046         {
1047         /* becomes true when negotiation is requested;
1048          * false again once a handshake has finished */
1049         return (s->renegotiate != 0);
1050         }
1051
1052 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1053         {
1054         long l;
1055
1056         switch (cmd)
1057                 {
1058         case SSL_CTRL_GET_READ_AHEAD:
1059                 return(s->read_ahead);
1060         case SSL_CTRL_SET_READ_AHEAD:
1061                 l=s->read_ahead;
1062                 s->read_ahead=larg;
1063                 return(l);
1064
1065         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1066                 s->msg_callback_arg = parg;
1067                 return 1;
1068
1069         case SSL_CTRL_OPTIONS:
1070                 return(s->options|=larg);
1071         case SSL_CTRL_CLEAR_OPTIONS:
1072                 return(s->options&=~larg);
1073         case SSL_CTRL_MODE:
1074                 return(s->mode|=larg);
1075         case SSL_CTRL_CLEAR_MODE:
1076                 return(s->mode &=~larg);
1077         case SSL_CTRL_GET_MAX_CERT_LIST:
1078                 return(s->max_cert_list);
1079         case SSL_CTRL_SET_MAX_CERT_LIST:
1080                 l=s->max_cert_list;
1081                 s->max_cert_list=larg;
1082                 return(l);
1083         case SSL_CTRL_SET_MTU:
1084 #ifndef OPENSSL_NO_DTLS1
1085                 if (larg < (long)dtls1_min_mtu())
1086                         return 0;
1087 #endif
1088
1089                 if (SSL_version(s) == DTLS1_VERSION ||
1090                     SSL_version(s) == DTLS1_BAD_VER)
1091                         {
1092                         s->d1->mtu = larg;
1093                         return larg;
1094                         }
1095                 return 0;
1096         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1097                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1098                         return 0;
1099                 s->max_send_fragment = larg;
1100                 return 1;
1101         case SSL_CTRL_GET_RI_SUPPORT:
1102                 if (s->s3)
1103                         return s->s3->send_connection_binding;
1104                 else return 0;
1105         default:
1106                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1107                 }
1108         }
1109
1110 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1111         {
1112         switch(cmd)
1113                 {
1114         case SSL_CTRL_SET_MSG_CALLBACK:
1115                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1116                 return 1;
1117
1118         default:
1119                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1120                 }
1121         }
1122
1123 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1124         {
1125         return ctx->sessions;
1126         }
1127
1128 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1129         {
1130         long l;
1131
1132         switch (cmd)
1133                 {
1134         case SSL_CTRL_GET_READ_AHEAD:
1135                 return(ctx->read_ahead);
1136         case SSL_CTRL_SET_READ_AHEAD:
1137                 l=ctx->read_ahead;
1138                 ctx->read_ahead=larg;
1139                 return(l);
1140
1141         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1142                 ctx->msg_callback_arg = parg;
1143                 return 1;
1144
1145         case SSL_CTRL_GET_MAX_CERT_LIST:
1146                 return(ctx->max_cert_list);
1147         case SSL_CTRL_SET_MAX_CERT_LIST:
1148                 l=ctx->max_cert_list;
1149                 ctx->max_cert_list=larg;
1150                 return(l);
1151
1152         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1153                 l=ctx->session_cache_size;
1154                 ctx->session_cache_size=larg;
1155                 return(l);
1156         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1157                 return(ctx->session_cache_size);
1158         case SSL_CTRL_SET_SESS_CACHE_MODE:
1159                 l=ctx->session_cache_mode;
1160                 ctx->session_cache_mode=larg;
1161                 return(l);
1162         case SSL_CTRL_GET_SESS_CACHE_MODE:
1163                 return(ctx->session_cache_mode);
1164
1165         case SSL_CTRL_SESS_NUMBER:
1166                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1167         case SSL_CTRL_SESS_CONNECT:
1168                 return(ctx->stats.sess_connect);
1169         case SSL_CTRL_SESS_CONNECT_GOOD:
1170                 return(ctx->stats.sess_connect_good);
1171         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1172                 return(ctx->stats.sess_connect_renegotiate);
1173         case SSL_CTRL_SESS_ACCEPT:
1174                 return(ctx->stats.sess_accept);
1175         case SSL_CTRL_SESS_ACCEPT_GOOD:
1176                 return(ctx->stats.sess_accept_good);
1177         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1178                 return(ctx->stats.sess_accept_renegotiate);
1179         case SSL_CTRL_SESS_HIT:
1180                 return(ctx->stats.sess_hit);
1181         case SSL_CTRL_SESS_CB_HIT:
1182                 return(ctx->stats.sess_cb_hit);
1183         case SSL_CTRL_SESS_MISSES:
1184                 return(ctx->stats.sess_miss);
1185         case SSL_CTRL_SESS_TIMEOUTS:
1186                 return(ctx->stats.sess_timeout);
1187         case SSL_CTRL_SESS_CACHE_FULL:
1188                 return(ctx->stats.sess_cache_full);
1189         case SSL_CTRL_OPTIONS:
1190                 return(ctx->options|=larg);
1191         case SSL_CTRL_CLEAR_OPTIONS:
1192                 return(ctx->options&=~larg);
1193         case SSL_CTRL_MODE:
1194                 return(ctx->mode|=larg);
1195         case SSL_CTRL_CLEAR_MODE:
1196                 return(ctx->mode&=~larg);
1197         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1198                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1199                         return 0;
1200                 ctx->max_send_fragment = larg;
1201                 return 1;
1202         default:
1203                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1204                 }
1205         }
1206
1207 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1208         {
1209         switch(cmd)
1210                 {
1211         case SSL_CTRL_SET_MSG_CALLBACK:
1212                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1213                 return 1;
1214
1215         default:
1216                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1217                 }
1218         }
1219
1220 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1221         {
1222         long l;
1223
1224         l=a->id-b->id;
1225         if (l == 0L)
1226                 return(0);
1227         else
1228                 return((l > 0)?1:-1);
1229         }
1230
1231 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1232                         const SSL_CIPHER * const *bp)
1233         {
1234         long l;
1235
1236         l=(*ap)->id-(*bp)->id;
1237         if (l == 0L)
1238                 return(0);
1239         else
1240                 return((l > 0)?1:-1);
1241         }
1242
1243 /** return a STACK of the ciphers available for the SSL and in order of
1244  * preference */
1245 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1246         {
1247         if (s != NULL)
1248                 {
1249                 if (s->cipher_list != NULL)
1250                         {
1251                         return(s->cipher_list);
1252                         }
1253                 else if ((s->ctx != NULL) &&
1254                         (s->ctx->cipher_list != NULL))
1255                         {
1256                         return(s->ctx->cipher_list);
1257                         }
1258                 }
1259         return(NULL);
1260         }
1261
1262 /** return a STACK of the ciphers available for the SSL and in order of
1263  * algorithm id */
1264 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1265         {
1266         if (s != NULL)
1267                 {
1268                 if (s->cipher_list_by_id != NULL)
1269                         {
1270                         return(s->cipher_list_by_id);
1271                         }
1272                 else if ((s->ctx != NULL) &&
1273                         (s->ctx->cipher_list_by_id != NULL))
1274                         {
1275                         return(s->ctx->cipher_list_by_id);
1276                         }
1277                 }
1278         return(NULL);
1279         }
1280
1281 /** The old interface to get the same thing as SSL_get_ciphers() */
1282 const char *SSL_get_cipher_list(const SSL *s,int n)
1283         {
1284         SSL_CIPHER *c;
1285         STACK_OF(SSL_CIPHER) *sk;
1286
1287         if (s == NULL) return(NULL);
1288         sk=SSL_get_ciphers(s);
1289         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1290                 return(NULL);
1291         c=sk_SSL_CIPHER_value(sk,n);
1292         if (c == NULL) return(NULL);
1293         return(c->name);
1294         }
1295
1296 /** specify the ciphers to be used by default by the SSL_CTX */
1297 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1298         {
1299         STACK_OF(SSL_CIPHER) *sk;
1300
1301         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1302                 &ctx->cipher_list_by_id,str);
1303         /* ssl_create_cipher_list may return an empty stack if it
1304          * was unable to find a cipher matching the given rule string
1305          * (for example if the rule string specifies a cipher which
1306          * has been disabled). This is not an error as far as
1307          * ssl_create_cipher_list is concerned, and hence
1308          * ctx->cipher_list and ctx->cipher_list_by_id has been
1309          * updated. */
1310         if (sk == NULL)
1311                 return 0;
1312         else if (sk_SSL_CIPHER_num(sk) == 0)
1313                 {
1314                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1315                 return 0;
1316                 }
1317         return 1;
1318         }
1319
1320 /** specify the ciphers to be used by the SSL */
1321 int SSL_set_cipher_list(SSL *s,const char *str)
1322         {
1323         STACK_OF(SSL_CIPHER) *sk;
1324
1325         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1326                 &s->cipher_list_by_id,str);
1327         /* see comment in SSL_CTX_set_cipher_list */
1328         if (sk == NULL)
1329                 return 0;
1330         else if (sk_SSL_CIPHER_num(sk) == 0)
1331                 {
1332                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1333                 return 0;
1334                 }
1335         return 1;
1336         }
1337
1338 /* works well for SSLv2, not so good for SSLv3 */
1339 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1340         {
1341         char *p;
1342         STACK_OF(SSL_CIPHER) *sk;
1343         SSL_CIPHER *c;
1344         int i;
1345
1346         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1347                 (len < 2))
1348                 return(NULL);
1349
1350         p=buf;
1351         sk=s->session->ciphers;
1352
1353         if (sk_SSL_CIPHER_num(sk) == 0)
1354                 return NULL;
1355
1356         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1357                 {
1358                 int n;
1359
1360                 c=sk_SSL_CIPHER_value(sk,i);
1361                 n=strlen(c->name);
1362                 if (n+1 > len)
1363                         {
1364                         if (p != buf)
1365                                 --p;
1366                         *p='\0';
1367                         return buf;
1368                         }
1369                 strcpy(p,c->name);
1370                 p+=n;
1371                 *(p++)=':';
1372                 len-=n+1;
1373                 }
1374         p[-1]='\0';
1375         return(buf);
1376         }
1377
1378 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1379                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1380         {
1381         int i,j=0;
1382         SSL_CIPHER *c;
1383         unsigned char *q;
1384 #ifndef OPENSSL_NO_KRB5
1385         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1386 #endif /* OPENSSL_NO_KRB5 */
1387
1388         if (sk == NULL) return(0);
1389         q=p;
1390         if (put_cb == NULL)
1391                 put_cb = s->method->put_cipher_by_char;
1392
1393         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1394                 {
1395                 c=sk_SSL_CIPHER_value(sk,i);
1396                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1397                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1398                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1399                         continue;
1400 #ifndef OPENSSL_NO_KRB5
1401                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1402                     nokrb5)
1403                     continue;
1404 #endif /* OPENSSL_NO_KRB5 */
1405 #ifndef OPENSSL_NO_PSK
1406                 /* with PSK there must be client callback set */
1407                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1408                     s->psk_client_callback == NULL)
1409                         continue;
1410 #endif /* OPENSSL_NO_PSK */
1411 #ifndef OPENSSL_NO_SRP
1412                 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
1413                     !(s->srp_ctx.srp_Mask & SSL_kSRP))
1414                     continue;
1415 #endif /* OPENSSL_NO_SRP */
1416                 j = put_cb(c,p);
1417                 p+=j;
1418                 }
1419         /* If p == q, no ciphers; caller indicates an error.
1420          * Otherwise, add applicable SCSVs. */
1421         if (p != q)
1422                 {
1423                 if (!s->renegotiate)
1424                         {
1425                         static SSL_CIPHER scsv =
1426                                 {
1427                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1428                                 };
1429                         j = put_cb(&scsv,p);
1430                         p+=j;
1431 #ifdef OPENSSL_RI_DEBUG
1432                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1433 #endif
1434                         }
1435
1436                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1437                         {
1438                         static SSL_CIPHER scsv =
1439                                 {
1440                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1441                                 };
1442                         j = put_cb(&scsv,p);
1443                         p+=j;
1444                         }
1445                 }
1446
1447         return(p-q);
1448         }
1449
1450 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1451                                                STACK_OF(SSL_CIPHER) **skp)
1452         {
1453         const SSL_CIPHER *c;
1454         STACK_OF(SSL_CIPHER) *sk;
1455         int i,n;
1456
1457         if (s->s3)
1458                 s->s3->send_connection_binding = 0;
1459
1460         n=ssl_put_cipher_by_char(s,NULL,NULL);
1461         if (n == 0 || (num%n) != 0)
1462                 {
1463                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1464                 return(NULL);
1465                 }
1466         if ((skp == NULL) || (*skp == NULL))
1467                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1468         else
1469                 {
1470                 sk= *skp;
1471                 sk_SSL_CIPHER_zero(sk);
1472                 }
1473
1474         for (i=0; i<num; i+=n)
1475                 {
1476                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1477                 if (s->s3 && (n != 3 || !p[0]) &&
1478                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1479                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1480                         {
1481                         /* SCSV fatal if renegotiating */
1482                         if (s->renegotiate)
1483                                 {
1484                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1485                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1486                                 goto err;
1487                                 }
1488                         s->s3->send_connection_binding = 1;
1489                         p += n;
1490 #ifdef OPENSSL_RI_DEBUG
1491                         fprintf(stderr, "SCSV received by server\n");
1492 #endif
1493                         continue;
1494                         }
1495
1496                 /* Check for TLS_FALLBACK_SCSV */
1497                 if ((n != 3 || !p[0]) &&
1498                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1499                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1500                         {
1501                         /* The SCSV indicates that the client previously tried a higher version.
1502                          * Fail if the current version is an unexpected downgrade. */
1503                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1504                                 {
1505                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1506                                 if (s->s3)
1507                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1508                                 goto err;
1509                                 }
1510                         continue;
1511                         }
1512
1513                 c=ssl_get_cipher_by_char(s,p);
1514                 p+=n;
1515                 if (c != NULL)
1516                         {
1517                         if (!sk_SSL_CIPHER_push(sk,c))
1518                                 {
1519                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1520                                 goto err;
1521                                 }
1522                         }
1523                 }
1524
1525         if (skp != NULL)
1526                 *skp=sk;
1527         return(sk);
1528 err:
1529         if ((skp == NULL) || (*skp == NULL))
1530                 sk_SSL_CIPHER_free(sk);
1531         return(NULL);
1532         }
1533
1534
1535 #ifndef OPENSSL_NO_TLSEXT
1536 /** return a servername extension value if provided in Client Hello, or NULL.
1537  * So far, only host_name types are defined (RFC 3546).
1538  */
1539
1540 const char *SSL_get_servername(const SSL *s, const int type)
1541         {
1542         if (type != TLSEXT_NAMETYPE_host_name)
1543                 return NULL;
1544
1545         return s->session && !s->tlsext_hostname ?
1546                 s->session->tlsext_hostname :
1547                 s->tlsext_hostname;
1548         }
1549
1550 int SSL_get_servername_type(const SSL *s)
1551         {
1552         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1553                 return TLSEXT_NAMETYPE_host_name;
1554         return -1;
1555         }
1556
1557 # ifndef OPENSSL_NO_NEXTPROTONEG
1558 /* SSL_select_next_proto implements the standard protocol selection. It is
1559  * expected that this function is called from the callback set by
1560  * SSL_CTX_set_next_proto_select_cb.
1561  *
1562  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1563  * strings. The length byte itself is not included in the length. A byte
1564  * string of length 0 is invalid. No byte string may be truncated.
1565  *
1566  * The current, but experimental algorithm for selecting the protocol is:
1567  *
1568  * 1) If the server doesn't support NPN then this is indicated to the
1569  * callback. In this case, the client application has to abort the connection
1570  * or have a default application level protocol.
1571  *
1572  * 2) If the server supports NPN, but advertises an empty list then the
1573  * client selects the first protcol in its list, but indicates via the
1574  * API that this fallback case was enacted.
1575  *
1576  * 3) Otherwise, the client finds the first protocol in the server's list
1577  * that it supports and selects this protocol. This is because it's
1578  * assumed that the server has better information about which protocol
1579  * a client should use.
1580  *
1581  * 4) If the client doesn't support any of the server's advertised
1582  * protocols, then this is treated the same as case 2.
1583  *
1584  * It returns either
1585  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1586  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1587  */
1588 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)
1589         {
1590         unsigned int i, j;
1591         const unsigned char *result;
1592         int status = OPENSSL_NPN_UNSUPPORTED;
1593
1594         /* For each protocol in server preference order, see if we support it. */
1595         for (i = 0; i < server_len; )
1596                 {
1597                 for (j = 0; j < client_len; )
1598                         {
1599                         if (server[i] == client[j] &&
1600                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1601                                 {
1602                                 /* We found a match */
1603                                 result = &server[i];
1604                                 status = OPENSSL_NPN_NEGOTIATED;
1605                                 goto found;
1606                                 }
1607                         j += client[j];
1608                         j++;
1609                         }
1610                 i += server[i];
1611                 i++;
1612                 }
1613
1614         /* There's no overlap between our protocols and the server's list. */
1615         result = client;
1616         status = OPENSSL_NPN_NO_OVERLAP;
1617
1618         found:
1619         *out = (unsigned char *) result + 1;
1620         *outlen = result[0];
1621         return status;
1622         }
1623
1624 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1625  * requested protocol for this connection and returns 0. If the client didn't
1626  * request any protocol, then *data is set to NULL.
1627  *
1628  * Note that the client can request any protocol it chooses. The value returned
1629  * from this function need not be a member of the list of supported protocols
1630  * provided by the callback.
1631  */
1632 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1633         {
1634         *data = s->next_proto_negotiated;
1635         if (!*data) {
1636                 *len = 0;
1637         } else {
1638                 *len = s->next_proto_negotiated_len;
1639         }
1640 }
1641
1642 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1643  * TLS server needs a list of supported protocols for Next Protocol
1644  * Negotiation. The returned list must be in wire format.  The list is returned
1645  * by setting |out| to point to it and |outlen| to its length. This memory will
1646  * not be modified, but one should assume that the SSL* keeps a reference to
1647  * it.
1648  *
1649  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1650  * such extension will be included in the ServerHello. */
1651 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)
1652         {
1653         ctx->next_protos_advertised_cb = cb;
1654         ctx->next_protos_advertised_cb_arg = arg;
1655         }
1656
1657 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1658  * client needs to select a protocol from the server's provided list. |out|
1659  * must be set to point to the selected protocol (which may be within |in|).
1660  * The length of the protocol name must be written into |outlen|. The server's
1661  * advertised protocols are provided in |in| and |inlen|. The callback can
1662  * assume that |in| is syntactically valid.
1663  *
1664  * The client must select a protocol. It is fatal to the connection if this
1665  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1666  */
1667 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)
1668         {
1669         ctx->next_proto_select_cb = cb;
1670         ctx->next_proto_select_cb_arg = arg;
1671         }
1672 # endif
1673 #endif
1674
1675 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1676         const char *label, size_t llen, const unsigned char *p, size_t plen,
1677         int use_context)
1678         {
1679         if (s->version < TLS1_VERSION)
1680                 return -1;
1681
1682         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1683                                                            llen, p, plen,
1684                                                            use_context);
1685         }
1686
1687 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1688         {
1689         unsigned long l;
1690
1691         l=(unsigned long)
1692                 ((unsigned int) a->session_id[0]     )|
1693                 ((unsigned int) a->session_id[1]<< 8L)|
1694                 ((unsigned long)a->session_id[2]<<16L)|
1695                 ((unsigned long)a->session_id[3]<<24L);
1696         return(l);
1697         }
1698
1699 /* NB: If this function (or indeed the hash function which uses a sort of
1700  * coarser function than this one) is changed, ensure
1701  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1702  * able to construct an SSL_SESSION that will collide with any existing session
1703  * with a matching session ID. */
1704 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1705         {
1706         if (a->ssl_version != b->ssl_version)
1707                 return(1);
1708         if (a->session_id_length != b->session_id_length)
1709                 return(1);
1710         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1711         }
1712
1713 /* These wrapper functions should remain rather than redeclaring
1714  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1715  * variable. The reason is that the functions aren't static, they're exposed via
1716  * ssl.h. */
1717 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1718 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1719
1720 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1721         {
1722         SSL_CTX *ret=NULL;
1723
1724         if (meth == NULL)
1725                 {
1726                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1727                 return(NULL);
1728                 }
1729
1730 #ifdef OPENSSL_FIPS
1731         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1732                 {
1733                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1734                 return NULL;
1735                 }
1736 #endif
1737
1738         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1739                 {
1740                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1741                 goto err;
1742                 }
1743         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1744         if (ret == NULL)
1745                 goto err;
1746
1747         memset(ret,0,sizeof(SSL_CTX));
1748
1749         ret->method=meth;
1750
1751         ret->cert_store=NULL;
1752         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1753         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1754         ret->session_cache_head=NULL;
1755         ret->session_cache_tail=NULL;
1756
1757         /* We take the system default */
1758         ret->session_timeout=meth->get_timeout();
1759
1760         ret->new_session_cb=0;
1761         ret->remove_session_cb=0;
1762         ret->get_session_cb=0;
1763         ret->generate_session_id=0;
1764
1765         memset((char *)&ret->stats,0,sizeof(ret->stats));
1766
1767         ret->references=1;
1768         ret->quiet_shutdown=0;
1769
1770 /*      ret->cipher=NULL;*/
1771 /*      ret->s2->challenge=NULL;
1772         ret->master_key=NULL;
1773         ret->key_arg=NULL;
1774         ret->s2->conn_id=NULL; */
1775
1776         ret->info_callback=NULL;
1777
1778         ret->app_verify_callback=0;
1779         ret->app_verify_arg=NULL;
1780
1781         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1782         ret->read_ahead=0;
1783         ret->msg_callback=0;
1784         ret->msg_callback_arg=NULL;
1785         ret->verify_mode=SSL_VERIFY_NONE;
1786 #if 0
1787         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1788 #endif
1789         ret->sid_ctx_length=0;
1790         ret->default_verify_callback=NULL;
1791         if ((ret->cert=ssl_cert_new()) == NULL)
1792                 goto err;
1793
1794         ret->default_passwd_callback=0;
1795         ret->default_passwd_callback_userdata=NULL;
1796         ret->client_cert_cb=0;
1797         ret->app_gen_cookie_cb=0;
1798         ret->app_verify_cookie_cb=0;
1799
1800         ret->sessions=lh_SSL_SESSION_new();
1801         if (ret->sessions == NULL) goto err;
1802         ret->cert_store=X509_STORE_new();
1803         if (ret->cert_store == NULL) goto err;
1804
1805         ssl_create_cipher_list(ret->method,
1806                 &ret->cipher_list,&ret->cipher_list_by_id,
1807                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1808         if (ret->cipher_list == NULL
1809             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1810                 {
1811                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1812                 goto err2;
1813                 }
1814
1815         ret->param = X509_VERIFY_PARAM_new();
1816         if (!ret->param)
1817                 goto err;
1818
1819         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1820                 {
1821                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1822                 goto err2;
1823                 }
1824         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1825                 {
1826                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1827                 goto err2;
1828                 }
1829         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1830                 {
1831                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1832                 goto err2;
1833                 }
1834
1835         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1836                 goto err;
1837
1838         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1839
1840         ret->extra_certs=NULL;
1841         /* No compression for DTLS */
1842         if (meth->version != DTLS1_VERSION)
1843                 ret->comp_methods=SSL_COMP_get_compression_methods();
1844
1845         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1846
1847 #ifndef OPENSSL_NO_TLSEXT
1848         ret->tlsext_servername_callback = 0;
1849         ret->tlsext_servername_arg = NULL;
1850         /* Setup RFC4507 ticket keys */
1851         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1852                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1853                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1854                 ret->options |= SSL_OP_NO_TICKET;
1855
1856         ret->tlsext_status_cb = 0;
1857         ret->tlsext_status_arg = NULL;
1858
1859 # ifndef OPENSSL_NO_NEXTPROTONEG
1860         ret->next_protos_advertised_cb = 0;
1861         ret->next_proto_select_cb = 0;
1862 # endif
1863 #endif
1864 #ifndef OPENSSL_NO_PSK
1865         ret->psk_identity_hint=NULL;
1866         ret->psk_client_callback=NULL;
1867         ret->psk_server_callback=NULL;
1868 #endif
1869 #ifndef OPENSSL_NO_SRP
1870         SSL_CTX_SRP_CTX_init(ret);
1871 #endif
1872 #ifndef OPENSSL_NO_BUF_FREELISTS
1873         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1874         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1875         if (!ret->rbuf_freelist)
1876                 goto err;
1877         ret->rbuf_freelist->chunklen = 0;
1878         ret->rbuf_freelist->len = 0;
1879         ret->rbuf_freelist->head = NULL;
1880         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1881         if (!ret->wbuf_freelist)
1882                 {
1883                 OPENSSL_free(ret->rbuf_freelist);
1884                 goto err;
1885                 }
1886         ret->wbuf_freelist->chunklen = 0;
1887         ret->wbuf_freelist->len = 0;
1888         ret->wbuf_freelist->head = NULL;
1889 #endif
1890 #ifndef OPENSSL_NO_ENGINE
1891         ret->client_cert_engine = NULL;
1892 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1893 #define eng_strx(x)     #x
1894 #define eng_str(x)      eng_strx(x)
1895         /* Use specific client engine automatically... ignore errors */
1896         {
1897         ENGINE *eng;
1898         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1899         if (!eng)
1900                 {
1901                 ERR_clear_error();
1902                 ENGINE_load_builtin_engines();
1903                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1904                 }
1905         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1906                 ERR_clear_error();
1907         }
1908 #endif
1909 #endif
1910         /* Default is to connect to non-RI servers. When RI is more widely
1911          * deployed might change this.
1912          */
1913         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1914
1915         return(ret);
1916 err:
1917         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1918 err2:
1919         if (ret != NULL) SSL_CTX_free(ret);
1920         return(NULL);
1921         }
1922
1923 #if 0
1924 static void SSL_COMP_free(SSL_COMP *comp)
1925     { OPENSSL_free(comp); }
1926 #endif
1927
1928 #ifndef OPENSSL_NO_BUF_FREELISTS
1929 static void
1930 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1931         {
1932         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1933         for (ent = list->head; ent; ent = next)
1934                 {
1935                 next = ent->next;
1936                 OPENSSL_free(ent);
1937                 }
1938         OPENSSL_free(list);
1939         }
1940 #endif
1941
1942 void SSL_CTX_free(SSL_CTX *a)
1943         {
1944         int i;
1945
1946         if (a == NULL) return;
1947
1948         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1949 #ifdef REF_PRINT
1950         REF_PRINT("SSL_CTX",a);
1951 #endif
1952         if (i > 0) return;
1953 #ifdef REF_CHECK
1954         if (i < 0)
1955                 {
1956                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1957                 abort(); /* ok */
1958                 }
1959 #endif
1960
1961         if (a->param)
1962                 X509_VERIFY_PARAM_free(a->param);
1963
1964         /*
1965          * Free internal session cache. However: the remove_cb() may reference
1966          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1967          * after the sessions were flushed.
1968          * As the ex_data handling routines might also touch the session cache,
1969          * the most secure solution seems to be: empty (flush) the cache, then
1970          * free ex_data, then finally free the cache.
1971          * (See ticket [openssl.org #212].)
1972          */
1973         if (a->sessions != NULL)
1974                 SSL_CTX_flush_sessions(a,0);
1975
1976         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1977
1978         if (a->sessions != NULL)
1979                 lh_SSL_SESSION_free(a->sessions);
1980
1981         if (a->cert_store != NULL)
1982                 X509_STORE_free(a->cert_store);
1983         if (a->cipher_list != NULL)
1984                 sk_SSL_CIPHER_free(a->cipher_list);
1985         if (a->cipher_list_by_id != NULL)
1986                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1987         if (a->cert != NULL)
1988                 ssl_cert_free(a->cert);
1989         if (a->client_CA != NULL)
1990                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1991         if (a->extra_certs != NULL)
1992                 sk_X509_pop_free(a->extra_certs,X509_free);
1993 #if 0 /* This should never be done, since it removes a global database */
1994         if (a->comp_methods != NULL)
1995                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1996 #else
1997         a->comp_methods = NULL;
1998 #endif
1999
2000 #ifndef OPENSSL_NO_SRTP
2001         if (a->srtp_profiles)
2002                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2003 #endif
2004
2005 #ifndef OPENSSL_NO_PSK
2006         if (a->psk_identity_hint)
2007                 OPENSSL_free(a->psk_identity_hint);
2008 #endif
2009 #ifndef OPENSSL_NO_SRP
2010         SSL_CTX_SRP_CTX_free(a);
2011 #endif
2012 #ifndef OPENSSL_NO_ENGINE
2013         if (a->client_cert_engine)
2014                 ENGINE_finish(a->client_cert_engine);
2015 #endif
2016
2017 #ifndef OPENSSL_NO_BUF_FREELISTS
2018         if (a->wbuf_freelist)
2019                 ssl_buf_freelist_free(a->wbuf_freelist);
2020         if (a->rbuf_freelist)
2021                 ssl_buf_freelist_free(a->rbuf_freelist);
2022 #endif
2023
2024         OPENSSL_free(a);
2025         }
2026
2027 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2028         {
2029         ctx->default_passwd_callback=cb;
2030         }
2031
2032 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2033         {
2034         ctx->default_passwd_callback_userdata=u;
2035         }
2036
2037 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2038         {
2039         ctx->app_verify_callback=cb;
2040         ctx->app_verify_arg=arg;
2041         }
2042
2043 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2044         {
2045         ctx->verify_mode=mode;
2046         ctx->default_verify_callback=cb;
2047         }
2048
2049 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2050         {
2051         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2052         }
2053
2054 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2055         {
2056         CERT_PKEY *cpk;
2057         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2058         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2059         int rsa_tmp_export,dh_tmp_export,kl;
2060         unsigned long mask_k,mask_a,emask_k,emask_a;
2061         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2062 #ifndef OPENSSL_NO_ECDH
2063         int have_ecdh_tmp;
2064 #endif
2065         X509 *x = NULL;
2066         EVP_PKEY *ecc_pkey = NULL;
2067         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2068
2069         if (c == NULL) return;
2070
2071         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2072
2073 #ifndef OPENSSL_NO_RSA
2074         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2075         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2076                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2077 #else
2078         rsa_tmp=rsa_tmp_export=0;
2079 #endif
2080 #ifndef OPENSSL_NO_DH
2081         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2082         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2083                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2084 #else
2085         dh_tmp=dh_tmp_export=0;
2086 #endif
2087
2088 #ifndef OPENSSL_NO_ECDH
2089         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2090 #endif
2091         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2092         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2093         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2094         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2095         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2096         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2097         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2098         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2099         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2100         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2101         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2102 /* FIX THIS EAY EAY EAY */
2103         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2104         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2105         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2106         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2107         mask_k=0;
2108         mask_a=0;
2109         emask_k=0;
2110         emask_a=0;
2111
2112
2113
2114 #ifdef CIPHER_DEBUG
2115         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2116                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2117                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2118 #endif
2119
2120         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2121         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2122                 mask_k |= SSL_kGOST;
2123                 mask_a |= SSL_aGOST01;
2124         }
2125         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2126         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2127                 mask_k |= SSL_kGOST;
2128                 mask_a |= SSL_aGOST94;
2129         }
2130
2131         if (rsa_enc || (rsa_tmp && rsa_sign))
2132                 mask_k|=SSL_kRSA;
2133         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2134                 emask_k|=SSL_kRSA;
2135
2136 #if 0
2137         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2138         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2139                 (rsa_enc || rsa_sign || dsa_sign))
2140                 mask_k|=SSL_kEDH;
2141         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2142                 (rsa_enc || rsa_sign || dsa_sign))
2143                 emask_k|=SSL_kEDH;
2144 #endif
2145
2146         if (dh_tmp_export)
2147                 emask_k|=SSL_kEDH;
2148
2149         if (dh_tmp)
2150                 mask_k|=SSL_kEDH;
2151
2152         if (dh_rsa) mask_k|=SSL_kDHr;
2153         if (dh_rsa_export) emask_k|=SSL_kDHr;
2154
2155         if (dh_dsa) mask_k|=SSL_kDHd;
2156         if (dh_dsa_export) emask_k|=SSL_kDHd;
2157
2158         if (rsa_enc || rsa_sign)
2159                 {
2160                 mask_a|=SSL_aRSA;
2161                 emask_a|=SSL_aRSA;
2162                 }
2163
2164         if (dsa_sign)
2165                 {
2166                 mask_a|=SSL_aDSS;
2167                 emask_a|=SSL_aDSS;
2168                 }
2169
2170         mask_a|=SSL_aNULL;
2171         emask_a|=SSL_aNULL;
2172
2173 #ifndef OPENSSL_NO_KRB5
2174         mask_k|=SSL_kKRB5;
2175         mask_a|=SSL_aKRB5;
2176         emask_k|=SSL_kKRB5;
2177         emask_a|=SSL_aKRB5;
2178 #endif
2179
2180         /* An ECC certificate may be usable for ECDH and/or
2181          * ECDSA cipher suites depending on the key usage extension.
2182          */
2183         if (have_ecc_cert)
2184                 {
2185                 /* This call populates extension flags (ex_flags) */
2186                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2187                 X509_check_purpose(x, -1, 0);
2188                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2189                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2190                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2191                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2192                 ecc_pkey = X509_get_pubkey(x);
2193                 ecc_pkey_size = (ecc_pkey != NULL) ?
2194                     EVP_PKEY_bits(ecc_pkey) : 0;
2195                 EVP_PKEY_free(ecc_pkey);
2196                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2197                         {
2198                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2199                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2200                         }
2201 #ifndef OPENSSL_NO_ECDH
2202                 if (ecdh_ok)
2203                         {
2204
2205                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2206                                 {
2207                                 mask_k|=SSL_kECDHr;
2208                                 mask_a|=SSL_aECDH;
2209                                 if (ecc_pkey_size <= 163)
2210                                         {
2211                                         emask_k|=SSL_kECDHr;
2212                                         emask_a|=SSL_aECDH;
2213                                         }
2214                                 }
2215
2216                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2217                                 {
2218                                 mask_k|=SSL_kECDHe;
2219                                 mask_a|=SSL_aECDH;
2220                                 if (ecc_pkey_size <= 163)
2221                                         {
2222                                         emask_k|=SSL_kECDHe;
2223                                         emask_a|=SSL_aECDH;
2224                                         }
2225                                 }
2226                         }
2227 #endif
2228 #ifndef OPENSSL_NO_ECDSA
2229                 if (ecdsa_ok)
2230                         {
2231                         mask_a|=SSL_aECDSA;
2232                         emask_a|=SSL_aECDSA;
2233                         }
2234 #endif
2235                 }
2236
2237 #ifndef OPENSSL_NO_ECDH
2238         if (have_ecdh_tmp)
2239                 {
2240                 mask_k|=SSL_kEECDH;
2241                 emask_k|=SSL_kEECDH;
2242                 }
2243 #endif
2244
2245 #ifndef OPENSSL_NO_PSK
2246         mask_k |= SSL_kPSK;
2247         mask_a |= SSL_aPSK;
2248         emask_k |= SSL_kPSK;
2249         emask_a |= SSL_aPSK;
2250 #endif
2251
2252         c->mask_k=mask_k;
2253         c->mask_a=mask_a;
2254         c->export_mask_k=emask_k;
2255         c->export_mask_a=emask_a;
2256         c->valid=1;
2257         }
2258
2259 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2260 #define ku_reject(x, usage) \
2261         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2262
2263 #ifndef OPENSSL_NO_EC
2264
2265 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2266         {
2267         unsigned long alg_k, alg_a;
2268         EVP_PKEY *pkey = NULL;
2269         int keysize = 0;
2270         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2271         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2272
2273         alg_k = cs->algorithm_mkey;
2274         alg_a = cs->algorithm_auth;
2275
2276         if (SSL_C_IS_EXPORT(cs))
2277                 {
2278                 /* ECDH key length in export ciphers must be <= 163 bits */
2279                 pkey = X509_get_pubkey(x);
2280                 if (pkey == NULL) return 0;
2281                 keysize = EVP_PKEY_bits(pkey);
2282                 EVP_PKEY_free(pkey);
2283                 if (keysize > 163) return 0;
2284                 }
2285
2286         /* This call populates the ex_flags field correctly */
2287         X509_check_purpose(x, -1, 0);
2288         if ((x->sig_alg) && (x->sig_alg->algorithm))
2289                 {
2290                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2291                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2292                 }
2293         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2294                 {
2295                 /* key usage, if present, must allow key agreement */
2296                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2297                         {
2298                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2299                         return 0;
2300                         }
2301                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2302                         {
2303                         /* signature alg must be ECDSA */
2304                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2305                                 {
2306                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2307                                 return 0;
2308                                 }
2309                         }
2310                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2311                         {
2312                         /* signature alg must be RSA */
2313
2314                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2315                                 {
2316                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2317                                 return 0;
2318                                 }
2319                         }
2320                 }
2321         if (alg_a & SSL_aECDSA)
2322                 {
2323                 /* key usage, if present, must allow signing */
2324                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2325                         {
2326                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2327                         return 0;
2328                         }
2329                 }
2330
2331         return 1;  /* all checks are ok */
2332         }
2333
2334 #endif
2335
2336 /* THIS NEEDS CLEANING UP */
2337 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2338         {
2339         unsigned long alg_k,alg_a;
2340         CERT *c;
2341         int i;
2342
2343         c=s->cert;
2344         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2345
2346         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2347         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2348
2349         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2350                 {
2351                 /* we don't need to look at SSL_kEECDH
2352                  * since no certificate is needed for
2353                  * anon ECDH and for authenticated
2354                  * EECDH, the check for the auth
2355                  * algorithm will set i correctly
2356                  * NOTE: For ECDH-RSA, we need an ECC
2357                  * not an RSA cert but for EECDH-RSA
2358                  * we need an RSA cert. Placing the
2359                  * checks for SSL_kECDH before RSA
2360                  * checks ensures the correct cert is chosen.
2361                  */
2362                 i=SSL_PKEY_ECC;
2363                 }
2364         else if (alg_a & SSL_aECDSA)
2365                 {
2366                 i=SSL_PKEY_ECC;
2367                 }
2368         else if (alg_k & SSL_kDHr)
2369                 i=SSL_PKEY_DH_RSA;
2370         else if (alg_k & SSL_kDHd)
2371                 i=SSL_PKEY_DH_DSA;
2372         else if (alg_a & SSL_aDSS)
2373                 i=SSL_PKEY_DSA_SIGN;
2374         else if (alg_a & SSL_aRSA)
2375                 {
2376                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2377                         i=SSL_PKEY_RSA_SIGN;
2378                 else
2379                         i=SSL_PKEY_RSA_ENC;
2380                 }
2381         else if (alg_a & SSL_aKRB5)
2382                 {
2383                 /* VRS something else here? */
2384                 return(NULL);
2385                 }
2386         else if (alg_a & SSL_aGOST94)
2387                 i=SSL_PKEY_GOST94;
2388         else if (alg_a & SSL_aGOST01)
2389                 i=SSL_PKEY_GOST01;
2390         else /* if (alg_a & SSL_aNULL) */
2391                 {
2392                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2393                 return(NULL);
2394                 }
2395
2396         return c->pkeys + i;
2397         }
2398
2399 X509 *ssl_get_server_send_cert(const SSL *s)
2400         {
2401         CERT_PKEY *cpk;
2402         cpk = ssl_get_server_send_pkey(s);
2403         if (!cpk)
2404                 return NULL;
2405         return cpk->x509;
2406         }
2407
2408 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2409         {
2410         unsigned long alg_a;
2411         CERT *c;
2412         int idx = -1;
2413
2414         alg_a = cipher->algorithm_auth;
2415         c=s->cert;
2416
2417         if ((alg_a & SSL_aDSS) &&
2418                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2419                 idx = SSL_PKEY_DSA_SIGN;
2420         else if (alg_a & SSL_aRSA)
2421                 {
2422                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2423                         idx = SSL_PKEY_RSA_SIGN;
2424                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2425                         idx = SSL_PKEY_RSA_ENC;
2426                 }
2427         else if ((alg_a & SSL_aECDSA) &&
2428                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2429                 idx = SSL_PKEY_ECC;
2430         if (idx == -1)
2431                 {
2432                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2433                 return(NULL);
2434                 }
2435         if (pmd)
2436                 *pmd = c->pkeys[idx].digest;
2437         return c->pkeys[idx].privatekey;
2438         }
2439
2440 void ssl_update_cache(SSL *s,int mode)
2441         {
2442         int i;
2443
2444         /* If the session_id_length is 0, we are not supposed to cache it,
2445          * and it would be rather hard to do anyway :-) */
2446         if (s->session->session_id_length == 0) return;
2447
2448         i=s->session_ctx->session_cache_mode;
2449         if ((i & mode) && (!s->hit)
2450                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2451                     || SSL_CTX_add_session(s->session_ctx,s->session))
2452                 && (s->session_ctx->new_session_cb != NULL))
2453                 {
2454                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2455                 if (!s->session_ctx->new_session_cb(s,s->session))
2456                         SSL_SESSION_free(s->session);
2457                 }
2458
2459         /* auto flush every 255 connections */
2460         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2461                 ((i & mode) == mode))
2462                 {
2463                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2464                         ?s->session_ctx->stats.sess_connect_good
2465                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2466                         {
2467                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2468                         }
2469                 }
2470         }
2471
2472 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2473         {
2474         return(s->method);
2475         }
2476
2477 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2478         {
2479         int conn= -1;
2480         int ret=1;
2481
2482         if (s->method != meth)
2483                 {
2484                 if (s->handshake_func != NULL)
2485                         conn=(s->handshake_func == s->method->ssl_connect);
2486
2487                 if (s->method->version == meth->version)
2488                         s->method=meth;
2489                 else
2490                         {
2491                         s->method->ssl_free(s);
2492                         s->method=meth;
2493                         ret=s->method->ssl_new(s);
2494                         }
2495
2496                 if (conn == 1)
2497                         s->handshake_func=meth->ssl_connect;
2498                 else if (conn == 0)
2499                         s->handshake_func=meth->ssl_accept;
2500                 }
2501         return(ret);
2502         }
2503
2504 int SSL_get_error(const SSL *s,int i)
2505         {
2506         int reason;
2507         unsigned long l;
2508         BIO *bio;
2509
2510         if (i > 0) return(SSL_ERROR_NONE);
2511
2512         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2513          * etc, where we do encode the error */
2514         if ((l=ERR_peek_error()) != 0)
2515                 {
2516                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2517                         return(SSL_ERROR_SYSCALL);
2518                 else
2519                         return(SSL_ERROR_SSL);
2520                 }
2521
2522         if ((i < 0) && SSL_want_read(s))
2523                 {
2524                 bio=SSL_get_rbio(s);
2525                 if (BIO_should_read(bio))
2526                         return(SSL_ERROR_WANT_READ);
2527                 else if (BIO_should_write(bio))
2528                         /* This one doesn't make too much sense ... We never try
2529                          * to write to the rbio, and an application program where
2530                          * rbio and wbio are separate couldn't even know what it
2531                          * should wait for.
2532                          * However if we ever set s->rwstate incorrectly
2533                          * (so that we have SSL_want_read(s) instead of
2534                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2535                          * this test works around that bug; so it might be safer
2536                          * to keep it. */
2537                         return(SSL_ERROR_WANT_WRITE);
2538                 else if (BIO_should_io_special(bio))
2539                         {
2540                         reason=BIO_get_retry_reason(bio);
2541                         if (reason == BIO_RR_CONNECT)
2542                                 return(SSL_ERROR_WANT_CONNECT);
2543                         else if (reason == BIO_RR_ACCEPT)
2544                                 return(SSL_ERROR_WANT_ACCEPT);
2545                         else
2546                                 return(SSL_ERROR_SYSCALL); /* unknown */
2547                         }
2548                 }
2549
2550         if ((i < 0) && SSL_want_write(s))
2551                 {
2552                 bio=SSL_get_wbio(s);
2553                 if (BIO_should_write(bio))
2554                         return(SSL_ERROR_WANT_WRITE);
2555                 else if (BIO_should_read(bio))
2556                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2557                         return(SSL_ERROR_WANT_READ);
2558                 else if (BIO_should_io_special(bio))
2559                         {
2560                         reason=BIO_get_retry_reason(bio);
2561                         if (reason == BIO_RR_CONNECT)
2562                                 return(SSL_ERROR_WANT_CONNECT);
2563                         else if (reason == BIO_RR_ACCEPT)
2564                                 return(SSL_ERROR_WANT_ACCEPT);
2565                         else
2566                                 return(SSL_ERROR_SYSCALL);
2567                         }
2568                 }
2569         if ((i < 0) && SSL_want_x509_lookup(s))
2570                 {
2571                 return(SSL_ERROR_WANT_X509_LOOKUP);
2572                 }
2573
2574         if (i == 0)
2575                 {
2576                 if (s->version == SSL2_VERSION)
2577                         {
2578                         /* assume it is the socket being closed */
2579                         return(SSL_ERROR_ZERO_RETURN);
2580                         }
2581                 else
2582                         {
2583                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2584                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2585                                 return(SSL_ERROR_ZERO_RETURN);
2586                         }
2587                 }
2588         return(SSL_ERROR_SYSCALL);
2589         }
2590
2591 int SSL_do_handshake(SSL *s)
2592         {
2593         int ret=1;
2594
2595         if (s->handshake_func == NULL)
2596                 {
2597                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2598                 return(-1);
2599                 }
2600
2601         s->method->ssl_renegotiate_check(s);
2602
2603         if (SSL_in_init(s) || SSL_in_before(s))
2604                 {
2605                 ret=s->handshake_func(s);
2606                 }
2607         return(ret);
2608         }
2609
2610 /* For the next 2 functions, SSL_clear() sets shutdown and so
2611  * one of these calls will reset it */
2612 void SSL_set_accept_state(SSL *s)
2613         {
2614         s->server=1;
2615         s->shutdown=0;
2616         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2617         s->handshake_func=s->method->ssl_accept;
2618         /* clear the current cipher */
2619         ssl_clear_cipher_ctx(s);
2620         ssl_clear_hash_ctx(&s->read_hash);
2621         ssl_clear_hash_ctx(&s->write_hash);
2622         }
2623
2624 void SSL_set_connect_state(SSL *s)
2625         {
2626         s->server=0;
2627         s->shutdown=0;
2628         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2629         s->handshake_func=s->method->ssl_connect;
2630         /* clear the current cipher */
2631         ssl_clear_cipher_ctx(s);
2632         ssl_clear_hash_ctx(&s->read_hash);
2633         ssl_clear_hash_ctx(&s->write_hash);
2634         }
2635
2636 int ssl_undefined_function(SSL *s)
2637         {
2638         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2639         return(0);
2640         }
2641
2642 int ssl_undefined_void_function(void)
2643         {
2644         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2645         return(0);
2646         }
2647
2648 int ssl_undefined_const_function(const SSL *s)
2649         {
2650         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2651         return(0);
2652         }
2653
2654 SSL_METHOD *ssl_bad_method(int ver)
2655         {
2656         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2657         return(NULL);
2658         }
2659
2660 const char *SSL_get_version(const SSL *s)
2661         {
2662         if (s->version == TLS1_2_VERSION)
2663                 return("TLSv1.2");
2664         else if (s->version == TLS1_1_VERSION)
2665                 return("TLSv1.1");
2666         else if (s->version == TLS1_VERSION)
2667                 return("TLSv1");
2668         else if (s->version == SSL3_VERSION)
2669                 return("SSLv3");
2670         else if (s->version == SSL2_VERSION)
2671                 return("SSLv2");
2672         else
2673                 return("unknown");
2674         }
2675
2676 SSL *SSL_dup(SSL *s)
2677         {
2678         STACK_OF(X509_NAME) *sk;
2679         X509_NAME *xn;
2680         SSL *ret;
2681         int i;
2682
2683         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2684             return(NULL);
2685
2686         ret->version = s->version;
2687         ret->type = s->type;
2688         ret->method = s->method;
2689
2690         if (s->session != NULL)
2691                 {
2692                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2693                 SSL_copy_session_id(ret,s);
2694                 }
2695         else
2696                 {
2697                 /* No session has been established yet, so we have to expect
2698                  * that s->cert or ret->cert will be changed later --
2699                  * they should not both point to the same object,
2700                  * and thus we can't use SSL_copy_session_id. */
2701
2702                 ret->method->ssl_free(ret);
2703                 ret->method = s->method;
2704                 ret->method->ssl_new(ret);
2705
2706                 if (s->cert != NULL)
2707                         {
2708                         if (ret->cert != NULL)
2709                                 {
2710                                 ssl_cert_free(ret->cert);
2711                                 }
2712                         ret->cert = ssl_cert_dup(s->cert);
2713                         if (ret->cert == NULL)
2714                                 goto err;
2715                         }
2716
2717                 SSL_set_session_id_context(ret,
2718                         s->sid_ctx, s->sid_ctx_length);
2719                 }
2720
2721         ret->options=s->options;
2722         ret->mode=s->mode;
2723         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2724         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2725         ret->msg_callback = s->msg_callback;
2726         ret->msg_callback_arg = s->msg_callback_arg;
2727         SSL_set_verify(ret,SSL_get_verify_mode(s),
2728                 SSL_get_verify_callback(s));
2729         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2730         ret->generate_session_id = s->generate_session_id;
2731
2732         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2733
2734         ret->debug=s->debug;
2735
2736         /* copy app data, a little dangerous perhaps */
2737         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2738                 goto err;
2739
2740         /* setup rbio, and wbio */
2741         if (s->rbio != NULL)
2742                 {
2743                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2744                         goto err;
2745                 }
2746         if (s->wbio != NULL)
2747                 {
2748                 if (s->wbio != s->rbio)
2749                         {
2750                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2751                                 goto err;
2752                         }
2753                 else
2754                         ret->wbio=ret->rbio;
2755                 }
2756         ret->rwstate = s->rwstate;
2757         ret->in_handshake = s->in_handshake;
2758         ret->handshake_func = s->handshake_func;
2759         ret->server = s->server;
2760         ret->renegotiate = s->renegotiate;
2761         ret->new_session = s->new_session;
2762         ret->quiet_shutdown = s->quiet_shutdown;
2763         ret->shutdown=s->shutdown;
2764         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2765         ret->rstate=s->rstate;
2766         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2767         ret->hit=s->hit;
2768
2769         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2770
2771         /* dup the cipher_list and cipher_list_by_id stacks */
2772         if (s->cipher_list != NULL)
2773                 {
2774                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2775                         goto err;
2776                 }
2777         if (s->cipher_list_by_id != NULL)
2778                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2779                         == NULL)
2780                         goto err;
2781
2782         /* Dup the client_CA list */
2783         if (s->client_CA != NULL)
2784                 {
2785                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2786                 ret->client_CA=sk;
2787                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2788                         {
2789                         xn=sk_X509_NAME_value(sk,i);
2790                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2791                                 {
2792                                 X509_NAME_free(xn);
2793                                 goto err;
2794                                 }
2795                         }
2796                 }
2797
2798         if (0)
2799                 {
2800 err:
2801                 if (ret != NULL) SSL_free(ret);
2802                 ret=NULL;
2803                 }
2804         return(ret);
2805         }
2806
2807 void ssl_clear_cipher_ctx(SSL *s)
2808         {
2809         if (s->enc_read_ctx != NULL)
2810                 {
2811                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2812                 OPENSSL_free(s->enc_read_ctx);
2813                 s->enc_read_ctx=NULL;
2814                 }
2815         if (s->enc_write_ctx != NULL)
2816                 {
2817                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2818                 OPENSSL_free(s->enc_write_ctx);
2819                 s->enc_write_ctx=NULL;
2820                 }
2821 #ifndef OPENSSL_NO_COMP
2822         if (s->expand != NULL)
2823                 {
2824                 COMP_CTX_free(s->expand);
2825                 s->expand=NULL;
2826                 }
2827         if (s->compress != NULL)
2828                 {
2829                 COMP_CTX_free(s->compress);
2830                 s->compress=NULL;
2831                 }
2832 #endif
2833         }
2834
2835 /* Fix this function so that it takes an optional type parameter */
2836 X509 *SSL_get_certificate(const SSL *s)
2837         {
2838         if (s->cert != NULL)
2839                 return(s->cert->key->x509);
2840         else
2841                 return(NULL);
2842         }
2843
2844 /* Fix this function so that it takes an optional type parameter */
2845 EVP_PKEY *SSL_get_privatekey(SSL *s)
2846         {
2847         if (s->cert != NULL)
2848                 return(s->cert->key->privatekey);
2849         else
2850                 return(NULL);
2851         }
2852
2853 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2854         {
2855         if ((s->session != NULL) && (s->session->cipher != NULL))
2856                 return(s->session->cipher);
2857         return(NULL);
2858         }
2859 #ifdef OPENSSL_NO_COMP
2860 const void *SSL_get_current_compression(SSL *s)
2861         {
2862         return NULL;
2863         }
2864 const void *SSL_get_current_expansion(SSL *s)
2865         {
2866         return NULL;
2867         }
2868 #else
2869
2870 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2871         {
2872         if (s->compress != NULL)
2873                 return(s->compress->meth);
2874         return(NULL);
2875         }
2876
2877 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2878         {
2879         if (s->expand != NULL)
2880                 return(s->expand->meth);
2881         return(NULL);
2882         }
2883 #endif
2884
2885 int ssl_init_wbio_buffer(SSL *s,int push)
2886         {
2887         BIO *bbio;
2888
2889         if (s->bbio == NULL)
2890                 {
2891                 bbio=BIO_new(BIO_f_buffer());
2892                 if (bbio == NULL) return(0);
2893                 s->bbio=bbio;
2894                 }
2895         else
2896                 {
2897                 bbio=s->bbio;
2898                 if (s->bbio == s->wbio)
2899                         s->wbio=BIO_pop(s->wbio);
2900                 }
2901         (void)BIO_reset(bbio);
2902 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2903         if (!BIO_set_read_buffer_size(bbio,1))
2904                 {
2905                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2906                 return(0);
2907                 }
2908         if (push)
2909                 {
2910                 if (s->wbio != bbio)
2911                         s->wbio=BIO_push(bbio,s->wbio);
2912                 }
2913         else
2914                 {
2915                 if (s->wbio == bbio)
2916                         s->wbio=BIO_pop(bbio);
2917                 }
2918         return(1);
2919         }
2920
2921 void ssl_free_wbio_buffer(SSL *s)
2922         {
2923         if (s->bbio == NULL) return;
2924
2925         if (s->bbio == s->wbio)
2926                 {
2927                 /* remove buffering */
2928                 s->wbio=BIO_pop(s->wbio);
2929 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2930                 assert(s->wbio != NULL);
2931 #endif
2932         }
2933         BIO_free(s->bbio);
2934         s->bbio=NULL;
2935         }
2936
2937 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2938         {
2939         ctx->quiet_shutdown=mode;
2940         }
2941
2942 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2943         {
2944         return(ctx->quiet_shutdown);
2945         }
2946
2947 void SSL_set_quiet_shutdown(SSL *s,int mode)
2948         {
2949         s->quiet_shutdown=mode;
2950         }
2951
2952 int SSL_get_quiet_shutdown(const SSL *s)
2953         {
2954         return(s->quiet_shutdown);
2955         }
2956
2957 void SSL_set_shutdown(SSL *s,int mode)
2958         {
2959         s->shutdown=mode;
2960         }
2961
2962 int SSL_get_shutdown(const SSL *s)
2963         {
2964         return(s->shutdown);
2965         }
2966
2967 int SSL_version(const SSL *s)
2968         {
2969         return(s->version);
2970         }
2971
2972 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2973         {
2974         return(ssl->ctx);
2975         }
2976
2977 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2978         {
2979         CERT *ocert = ssl->cert;
2980         if (ssl->ctx == ctx)
2981                 return ssl->ctx;
2982 #ifndef OPENSSL_NO_TLSEXT
2983         if (ctx == NULL)
2984                 ctx = ssl->initial_ctx;
2985 #endif
2986         ssl->cert = ssl_cert_dup(ctx->cert);
2987         if (ocert != NULL)
2988                 {
2989                 int i;
2990                 /* Copy negotiated digests from original */
2991                 for (i = 0; i < SSL_PKEY_NUM; i++)
2992                         {
2993                         CERT_PKEY *cpk = ocert->pkeys + i;
2994                         CERT_PKEY *rpk = ssl->cert->pkeys + i;
2995                         rpk->digest = cpk->digest;
2996                         }
2997                 ssl_cert_free(ocert);
2998                 }
2999         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3000         if (ssl->ctx != NULL)
3001                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3002         ssl->ctx = ctx;
3003         return(ssl->ctx);
3004         }
3005
3006 #ifndef OPENSSL_NO_STDIO
3007 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3008         {
3009         return(X509_STORE_set_default_paths(ctx->cert_store));
3010         }
3011
3012 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3013                 const char *CApath)
3014         {
3015         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3016         }
3017 #endif
3018
3019 void SSL_set_info_callback(SSL *ssl,
3020         void (*cb)(const SSL *ssl,int type,int val))
3021         {
3022         ssl->info_callback=cb;
3023         }
3024
3025 /* One compiler (Diab DCC) doesn't like argument names in returned
3026    function pointer.  */
3027 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3028         {
3029         return ssl->info_callback;
3030         }
3031
3032 int SSL_state(const SSL *ssl)
3033         {
3034         return(ssl->state);
3035         }
3036
3037 void SSL_set_state(SSL *ssl, int state)
3038         {
3039         ssl->state = state;
3040         }
3041
3042 void SSL_set_verify_result(SSL *ssl,long arg)
3043         {
3044         ssl->verify_result=arg;
3045         }
3046
3047 long SSL_get_verify_result(const SSL *ssl)
3048         {
3049         return(ssl->verify_result);
3050         }
3051
3052 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3053                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3054         {
3055         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3056                                 new_func, dup_func, free_func);
3057         }
3058
3059 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3060         {
3061         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3062         }
3063
3064 void *SSL_get_ex_data(const SSL *s,int idx)
3065         {
3066         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3067         }
3068
3069 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3070                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3071         {
3072         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3073                                 new_func, dup_func, free_func);
3074         }
3075
3076 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3077         {
3078         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3079         }
3080
3081 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3082         {
3083         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3084         }
3085
3086 int ssl_ok(SSL *s)
3087         {
3088         return(1);
3089         }
3090
3091 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3092         {
3093         return(ctx->cert_store);
3094         }
3095
3096 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3097         {
3098         if (ctx->cert_store != NULL)
3099                 X509_STORE_free(ctx->cert_store);
3100         ctx->cert_store=store;
3101         }
3102
3103 int SSL_want(const SSL *s)
3104         {
3105         return(s->rwstate);
3106         }
3107
3108 /*!
3109  * \brief Set the callback for generating temporary RSA keys.
3110  * \param ctx the SSL context.
3111  * \param cb the callback
3112  */
3113
3114 #ifndef OPENSSL_NO_RSA
3115 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3116                                                           int is_export,
3117                                                           int keylength))
3118     {
3119     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3120     }
3121
3122 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3123                                                   int is_export,
3124                                                   int keylength))
3125     {
3126     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3127     }
3128 #endif
3129
3130 #ifdef DOXYGEN
3131 /*!
3132  * \brief The RSA temporary key callback function.
3133  * \param ssl the SSL session.
3134  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3135  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3136  * of the required key in bits.
3137  * \return the temporary RSA key.
3138  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3139  */
3140
3141 RSA *cb(SSL *ssl,int is_export,int keylength)
3142     {}
3143 #endif
3144
3145 /*!
3146  * \brief Set the callback for generating temporary DH keys.
3147  * \param ctx the SSL context.
3148  * \param dh the callback
3149  */
3150
3151 #ifndef OPENSSL_NO_DH
3152 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3153                                                         int keylength))
3154         {
3155         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3156         }
3157
3158 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3159                                                 int keylength))
3160         {
3161         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3162         }
3163 #endif
3164
3165 #ifndef OPENSSL_NO_ECDH
3166 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3167                                                                 int keylength))
3168         {
3169         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3170         }
3171
3172 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3173                                                         int keylength))
3174         {
3175         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3176         }
3177 #endif
3178
3179 #ifndef OPENSSL_NO_PSK
3180 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3181         {
3182         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3183                 {
3184                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3185                 return 0;
3186                 }
3187         if (ctx->psk_identity_hint != NULL)
3188                 OPENSSL_free(ctx->psk_identity_hint);
3189         if (identity_hint != NULL)
3190                 {
3191                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3192                 if (ctx->psk_identity_hint == NULL)
3193                         return 0;
3194                 }
3195         else
3196                 ctx->psk_identity_hint = NULL;
3197         return 1;
3198         }
3199
3200 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3201         {
3202         if (s == NULL)
3203                 return 0;
3204
3205         if (s->session == NULL)
3206                 return 1; /* session not created yet, ignored */
3207
3208         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3209                 {
3210                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3211                 return 0;
3212                 }
3213         if (s->session->psk_identity_hint != NULL)
3214                 OPENSSL_free(s->session->psk_identity_hint);
3215         if (identity_hint != NULL)
3216                 {
3217                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3218                 if (s->session->psk_identity_hint == NULL)
3219                         return 0;
3220                 }
3221         else
3222                 s->session->psk_identity_hint = NULL;
3223         return 1;
3224         }
3225
3226 const char *SSL_get_psk_identity_hint(const SSL *s)
3227         {
3228         if (s == NULL || s->session == NULL)
3229                 return NULL;
3230         return(s->session->psk_identity_hint);
3231         }
3232
3233 const char *SSL_get_psk_identity(const SSL *s)
3234         {
3235         if (s == NULL || s->session == NULL)
3236                 return NULL;
3237         return(s->session->psk_identity);
3238         }
3239
3240 void SSL_set_psk_client_callback(SSL *s,
3241     unsigned int (*cb)(SSL *ssl, const char *hint,
3242                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3243                        unsigned int max_psk_len))
3244         {
3245         s->psk_client_callback = cb;
3246         }
3247
3248 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3249     unsigned int (*cb)(SSL *ssl, const char *hint,
3250                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3251                        unsigned int max_psk_len))
3252         {
3253         ctx->psk_client_callback = cb;
3254         }
3255
3256 void SSL_set_psk_server_callback(SSL *s,
3257     unsigned int (*cb)(SSL *ssl, const char *identity,
3258                        unsigned char *psk, unsigned int max_psk_len))
3259         {
3260         s->psk_server_callback = cb;
3261         }
3262
3263 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3264     unsigned int (*cb)(SSL *ssl, const char *identity,
3265                        unsigned char *psk, unsigned int max_psk_len))
3266         {
3267         ctx->psk_server_callback = cb;
3268         }
3269 #endif
3270
3271 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))
3272         {
3273         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3274         }
3275 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))
3276         {
3277         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3278         }
3279
3280 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3281  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3282  * any. If EVP_MD pointer is passed, initializes ctx with this md
3283  * Returns newly allocated ctx;
3284  */
3285
3286 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3287 {
3288         ssl_clear_hash_ctx(hash);
3289         *hash = EVP_MD_CTX_create();
3290         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3291         return *hash;
3292 }
3293 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3294 {
3295
3296         if (*hash) EVP_MD_CTX_destroy(*hash);
3297         *hash=NULL;
3298 }
3299
3300 void SSL_set_debug(SSL *s, int debug)
3301         {
3302         s->debug = debug;
3303         }
3304
3305 int SSL_cache_hit(SSL *s)
3306         {
3307         return s->hit;
3308         }
3309
3310 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3311 #include "../crypto/bio/bss_file.c"
3312 #endif
3313
3314 IMPLEMENT_STACK_OF(SSL_CIPHER)
3315 IMPLEMENT_STACK_OF(SSL_COMP)
3316 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3317                                     ssl_cipher_id);