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                         p += n;
1511                         continue;
1512                         }
1513
1514                 c=ssl_get_cipher_by_char(s,p);
1515                 p+=n;
1516                 if (c != NULL)
1517                         {
1518                         if (!sk_SSL_CIPHER_push(sk,c))
1519                                 {
1520                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1521                                 goto err;
1522                                 }
1523                         }
1524                 }
1525
1526         if (skp != NULL)
1527                 *skp=sk;
1528         return(sk);
1529 err:
1530         if ((skp == NULL) || (*skp == NULL))
1531                 sk_SSL_CIPHER_free(sk);
1532         return(NULL);
1533         }
1534
1535
1536 #ifndef OPENSSL_NO_TLSEXT
1537 /** return a servername extension value if provided in Client Hello, or NULL.
1538  * So far, only host_name types are defined (RFC 3546).
1539  */
1540
1541 const char *SSL_get_servername(const SSL *s, const int type)
1542         {
1543         if (type != TLSEXT_NAMETYPE_host_name)
1544                 return NULL;
1545
1546         return s->session && !s->tlsext_hostname ?
1547                 s->session->tlsext_hostname :
1548                 s->tlsext_hostname;
1549         }
1550
1551 int SSL_get_servername_type(const SSL *s)
1552         {
1553         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1554                 return TLSEXT_NAMETYPE_host_name;
1555         return -1;
1556         }
1557
1558 # ifndef OPENSSL_NO_NEXTPROTONEG
1559 /* SSL_select_next_proto implements the standard protocol selection. It is
1560  * expected that this function is called from the callback set by
1561  * SSL_CTX_set_next_proto_select_cb.
1562  *
1563  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1564  * strings. The length byte itself is not included in the length. A byte
1565  * string of length 0 is invalid. No byte string may be truncated.
1566  *
1567  * The current, but experimental algorithm for selecting the protocol is:
1568  *
1569  * 1) If the server doesn't support NPN then this is indicated to the
1570  * callback. In this case, the client application has to abort the connection
1571  * or have a default application level protocol.
1572  *
1573  * 2) If the server supports NPN, but advertises an empty list then the
1574  * client selects the first protcol in its list, but indicates via the
1575  * API that this fallback case was enacted.
1576  *
1577  * 3) Otherwise, the client finds the first protocol in the server's list
1578  * that it supports and selects this protocol. This is because it's
1579  * assumed that the server has better information about which protocol
1580  * a client should use.
1581  *
1582  * 4) If the client doesn't support any of the server's advertised
1583  * protocols, then this is treated the same as case 2.
1584  *
1585  * It returns either
1586  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1587  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1588  */
1589 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)
1590         {
1591         unsigned int i, j;
1592         const unsigned char *result;
1593         int status = OPENSSL_NPN_UNSUPPORTED;
1594
1595         /* For each protocol in server preference order, see if we support it. */
1596         for (i = 0; i < server_len; )
1597                 {
1598                 for (j = 0; j < client_len; )
1599                         {
1600                         if (server[i] == client[j] &&
1601                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1602                                 {
1603                                 /* We found a match */
1604                                 result = &server[i];
1605                                 status = OPENSSL_NPN_NEGOTIATED;
1606                                 goto found;
1607                                 }
1608                         j += client[j];
1609                         j++;
1610                         }
1611                 i += server[i];
1612                 i++;
1613                 }
1614
1615         /* There's no overlap between our protocols and the server's list. */
1616         result = client;
1617         status = OPENSSL_NPN_NO_OVERLAP;
1618
1619         found:
1620         *out = (unsigned char *) result + 1;
1621         *outlen = result[0];
1622         return status;
1623         }
1624
1625 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1626  * requested protocol for this connection and returns 0. If the client didn't
1627  * request any protocol, then *data is set to NULL.
1628  *
1629  * Note that the client can request any protocol it chooses. The value returned
1630  * from this function need not be a member of the list of supported protocols
1631  * provided by the callback.
1632  */
1633 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1634         {
1635         *data = s->next_proto_negotiated;
1636         if (!*data) {
1637                 *len = 0;
1638         } else {
1639                 *len = s->next_proto_negotiated_len;
1640         }
1641 }
1642
1643 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1644  * TLS server needs a list of supported protocols for Next Protocol
1645  * Negotiation. The returned list must be in wire format.  The list is returned
1646  * by setting |out| to point to it and |outlen| to its length. This memory will
1647  * not be modified, but one should assume that the SSL* keeps a reference to
1648  * it.
1649  *
1650  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1651  * such extension will be included in the ServerHello. */
1652 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)
1653         {
1654         ctx->next_protos_advertised_cb = cb;
1655         ctx->next_protos_advertised_cb_arg = arg;
1656         }
1657
1658 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1659  * client needs to select a protocol from the server's provided list. |out|
1660  * must be set to point to the selected protocol (which may be within |in|).
1661  * The length of the protocol name must be written into |outlen|. The server's
1662  * advertised protocols are provided in |in| and |inlen|. The callback can
1663  * assume that |in| is syntactically valid.
1664  *
1665  * The client must select a protocol. It is fatal to the connection if this
1666  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1667  */
1668 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)
1669         {
1670         ctx->next_proto_select_cb = cb;
1671         ctx->next_proto_select_cb_arg = arg;
1672         }
1673 # endif
1674 #endif
1675
1676 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1677         const char *label, size_t llen, const unsigned char *p, size_t plen,
1678         int use_context)
1679         {
1680         if (s->version < TLS1_VERSION)
1681                 return -1;
1682
1683         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1684                                                            llen, p, plen,
1685                                                            use_context);
1686         }
1687
1688 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1689         {
1690         unsigned long l;
1691
1692         l=(unsigned long)
1693                 ((unsigned int) a->session_id[0]     )|
1694                 ((unsigned int) a->session_id[1]<< 8L)|
1695                 ((unsigned long)a->session_id[2]<<16L)|
1696                 ((unsigned long)a->session_id[3]<<24L);
1697         return(l);
1698         }
1699
1700 /* NB: If this function (or indeed the hash function which uses a sort of
1701  * coarser function than this one) is changed, ensure
1702  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1703  * able to construct an SSL_SESSION that will collide with any existing session
1704  * with a matching session ID. */
1705 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1706         {
1707         if (a->ssl_version != b->ssl_version)
1708                 return(1);
1709         if (a->session_id_length != b->session_id_length)
1710                 return(1);
1711         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1712         }
1713
1714 /* These wrapper functions should remain rather than redeclaring
1715  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1716  * variable. The reason is that the functions aren't static, they're exposed via
1717  * ssl.h. */
1718 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1719 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1720
1721 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1722         {
1723         SSL_CTX *ret=NULL;
1724
1725         if (meth == NULL)
1726                 {
1727                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1728                 return(NULL);
1729                 }
1730
1731 #ifdef OPENSSL_FIPS
1732         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1733                 {
1734                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1735                 return NULL;
1736                 }
1737 #endif
1738
1739         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1740                 {
1741                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1742                 goto err;
1743                 }
1744         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1745         if (ret == NULL)
1746                 goto err;
1747
1748         memset(ret,0,sizeof(SSL_CTX));
1749
1750         ret->method=meth;
1751
1752         ret->cert_store=NULL;
1753         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1754         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1755         ret->session_cache_head=NULL;
1756         ret->session_cache_tail=NULL;
1757
1758         /* We take the system default */
1759         ret->session_timeout=meth->get_timeout();
1760
1761         ret->new_session_cb=0;
1762         ret->remove_session_cb=0;
1763         ret->get_session_cb=0;
1764         ret->generate_session_id=0;
1765
1766         memset((char *)&ret->stats,0,sizeof(ret->stats));
1767
1768         ret->references=1;
1769         ret->quiet_shutdown=0;
1770
1771 /*      ret->cipher=NULL;*/
1772 /*      ret->s2->challenge=NULL;
1773         ret->master_key=NULL;
1774         ret->key_arg=NULL;
1775         ret->s2->conn_id=NULL; */
1776
1777         ret->info_callback=NULL;
1778
1779         ret->app_verify_callback=0;
1780         ret->app_verify_arg=NULL;
1781
1782         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1783         ret->read_ahead=0;
1784         ret->msg_callback=0;
1785         ret->msg_callback_arg=NULL;
1786         ret->verify_mode=SSL_VERIFY_NONE;
1787 #if 0
1788         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1789 #endif
1790         ret->sid_ctx_length=0;
1791         ret->default_verify_callback=NULL;
1792         if ((ret->cert=ssl_cert_new()) == NULL)
1793                 goto err;
1794
1795         ret->default_passwd_callback=0;
1796         ret->default_passwd_callback_userdata=NULL;
1797         ret->client_cert_cb=0;
1798         ret->app_gen_cookie_cb=0;
1799         ret->app_verify_cookie_cb=0;
1800
1801         ret->sessions=lh_SSL_SESSION_new();
1802         if (ret->sessions == NULL) goto err;
1803         ret->cert_store=X509_STORE_new();
1804         if (ret->cert_store == NULL) goto err;
1805
1806         ssl_create_cipher_list(ret->method,
1807                 &ret->cipher_list,&ret->cipher_list_by_id,
1808                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1809         if (ret->cipher_list == NULL
1810             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1811                 {
1812                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1813                 goto err2;
1814                 }
1815
1816         ret->param = X509_VERIFY_PARAM_new();
1817         if (!ret->param)
1818                 goto err;
1819
1820         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1821                 {
1822                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1823                 goto err2;
1824                 }
1825         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1826                 {
1827                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1828                 goto err2;
1829                 }
1830         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1831                 {
1832                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1833                 goto err2;
1834                 }
1835
1836         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1837                 goto err;
1838
1839         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1840
1841         ret->extra_certs=NULL;
1842         /* No compression for DTLS */
1843         if (meth->version != DTLS1_VERSION)
1844                 ret->comp_methods=SSL_COMP_get_compression_methods();
1845
1846         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1847
1848 #ifndef OPENSSL_NO_TLSEXT
1849         ret->tlsext_servername_callback = 0;
1850         ret->tlsext_servername_arg = NULL;
1851         /* Setup RFC4507 ticket keys */
1852         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1853                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1854                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1855                 ret->options |= SSL_OP_NO_TICKET;
1856
1857         ret->tlsext_status_cb = 0;
1858         ret->tlsext_status_arg = NULL;
1859
1860 # ifndef OPENSSL_NO_NEXTPROTONEG
1861         ret->next_protos_advertised_cb = 0;
1862         ret->next_proto_select_cb = 0;
1863 # endif
1864 #endif
1865 #ifndef OPENSSL_NO_PSK
1866         ret->psk_identity_hint=NULL;
1867         ret->psk_client_callback=NULL;
1868         ret->psk_server_callback=NULL;
1869 #endif
1870 #ifndef OPENSSL_NO_SRP
1871         SSL_CTX_SRP_CTX_init(ret);
1872 #endif
1873 #ifndef OPENSSL_NO_BUF_FREELISTS
1874         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1875         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1876         if (!ret->rbuf_freelist)
1877                 goto err;
1878         ret->rbuf_freelist->chunklen = 0;
1879         ret->rbuf_freelist->len = 0;
1880         ret->rbuf_freelist->head = NULL;
1881         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1882         if (!ret->wbuf_freelist)
1883                 {
1884                 OPENSSL_free(ret->rbuf_freelist);
1885                 goto err;
1886                 }
1887         ret->wbuf_freelist->chunklen = 0;
1888         ret->wbuf_freelist->len = 0;
1889         ret->wbuf_freelist->head = NULL;
1890 #endif
1891 #ifndef OPENSSL_NO_ENGINE
1892         ret->client_cert_engine = NULL;
1893 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1894 #define eng_strx(x)     #x
1895 #define eng_str(x)      eng_strx(x)
1896         /* Use specific client engine automatically... ignore errors */
1897         {
1898         ENGINE *eng;
1899         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1900         if (!eng)
1901                 {
1902                 ERR_clear_error();
1903                 ENGINE_load_builtin_engines();
1904                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1905                 }
1906         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1907                 ERR_clear_error();
1908         }
1909 #endif
1910 #endif
1911         /* Default is to connect to non-RI servers. When RI is more widely
1912          * deployed might change this.
1913          */
1914         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1915
1916         return(ret);
1917 err:
1918         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1919 err2:
1920         if (ret != NULL) SSL_CTX_free(ret);
1921         return(NULL);
1922         }
1923
1924 #if 0
1925 static void SSL_COMP_free(SSL_COMP *comp)
1926     { OPENSSL_free(comp); }
1927 #endif
1928
1929 #ifndef OPENSSL_NO_BUF_FREELISTS
1930 static void
1931 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1932         {
1933         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1934         for (ent = list->head; ent; ent = next)
1935                 {
1936                 next = ent->next;
1937                 OPENSSL_free(ent);
1938                 }
1939         OPENSSL_free(list);
1940         }
1941 #endif
1942
1943 void SSL_CTX_free(SSL_CTX *a)
1944         {
1945         int i;
1946
1947         if (a == NULL) return;
1948
1949         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1950 #ifdef REF_PRINT
1951         REF_PRINT("SSL_CTX",a);
1952 #endif
1953         if (i > 0) return;
1954 #ifdef REF_CHECK
1955         if (i < 0)
1956                 {
1957                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1958                 abort(); /* ok */
1959                 }
1960 #endif
1961
1962         if (a->param)
1963                 X509_VERIFY_PARAM_free(a->param);
1964
1965         /*
1966          * Free internal session cache. However: the remove_cb() may reference
1967          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1968          * after the sessions were flushed.
1969          * As the ex_data handling routines might also touch the session cache,
1970          * the most secure solution seems to be: empty (flush) the cache, then
1971          * free ex_data, then finally free the cache.
1972          * (See ticket [openssl.org #212].)
1973          */
1974         if (a->sessions != NULL)
1975                 SSL_CTX_flush_sessions(a,0);
1976
1977         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1978
1979         if (a->sessions != NULL)
1980                 lh_SSL_SESSION_free(a->sessions);
1981
1982         if (a->cert_store != NULL)
1983                 X509_STORE_free(a->cert_store);
1984         if (a->cipher_list != NULL)
1985                 sk_SSL_CIPHER_free(a->cipher_list);
1986         if (a->cipher_list_by_id != NULL)
1987                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1988         if (a->cert != NULL)
1989                 ssl_cert_free(a->cert);
1990         if (a->client_CA != NULL)
1991                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1992         if (a->extra_certs != NULL)
1993                 sk_X509_pop_free(a->extra_certs,X509_free);
1994 #if 0 /* This should never be done, since it removes a global database */
1995         if (a->comp_methods != NULL)
1996                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1997 #else
1998         a->comp_methods = NULL;
1999 #endif
2000
2001 #ifndef OPENSSL_NO_SRTP
2002         if (a->srtp_profiles)
2003                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2004 #endif
2005
2006 #ifndef OPENSSL_NO_PSK
2007         if (a->psk_identity_hint)
2008                 OPENSSL_free(a->psk_identity_hint);
2009 #endif
2010 #ifndef OPENSSL_NO_SRP
2011         SSL_CTX_SRP_CTX_free(a);
2012 #endif
2013 #ifndef OPENSSL_NO_ENGINE
2014         if (a->client_cert_engine)
2015                 ENGINE_finish(a->client_cert_engine);
2016 #endif
2017
2018 #ifndef OPENSSL_NO_BUF_FREELISTS
2019         if (a->wbuf_freelist)
2020                 ssl_buf_freelist_free(a->wbuf_freelist);
2021         if (a->rbuf_freelist)
2022                 ssl_buf_freelist_free(a->rbuf_freelist);
2023 #endif
2024
2025         OPENSSL_free(a);
2026         }
2027
2028 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2029         {
2030         ctx->default_passwd_callback=cb;
2031         }
2032
2033 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2034         {
2035         ctx->default_passwd_callback_userdata=u;
2036         }
2037
2038 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2039         {
2040         ctx->app_verify_callback=cb;
2041         ctx->app_verify_arg=arg;
2042         }
2043
2044 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2045         {
2046         ctx->verify_mode=mode;
2047         ctx->default_verify_callback=cb;
2048         }
2049
2050 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2051         {
2052         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2053         }
2054
2055 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2056         {
2057         CERT_PKEY *cpk;
2058         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2059         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2060         int rsa_tmp_export,dh_tmp_export,kl;
2061         unsigned long mask_k,mask_a,emask_k,emask_a;
2062         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2063 #ifndef OPENSSL_NO_ECDH
2064         int have_ecdh_tmp;
2065 #endif
2066         X509 *x = NULL;
2067         EVP_PKEY *ecc_pkey = NULL;
2068         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2069
2070         if (c == NULL) return;
2071
2072         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2073
2074 #ifndef OPENSSL_NO_RSA
2075         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2076         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2077                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2078 #else
2079         rsa_tmp=rsa_tmp_export=0;
2080 #endif
2081 #ifndef OPENSSL_NO_DH
2082         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2083         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2084                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2085 #else
2086         dh_tmp=dh_tmp_export=0;
2087 #endif
2088
2089 #ifndef OPENSSL_NO_ECDH
2090         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2091 #endif
2092         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2093         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2094         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2095         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2096         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2097         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2098         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2099         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2100         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2101         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2102         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2103 /* FIX THIS EAY EAY EAY */
2104         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2105         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2106         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2107         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2108         mask_k=0;
2109         mask_a=0;
2110         emask_k=0;
2111         emask_a=0;
2112
2113
2114
2115 #ifdef CIPHER_DEBUG
2116         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2117                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2118                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2119 #endif
2120
2121         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2122         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2123                 mask_k |= SSL_kGOST;
2124                 mask_a |= SSL_aGOST01;
2125         }
2126         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2127         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2128                 mask_k |= SSL_kGOST;
2129                 mask_a |= SSL_aGOST94;
2130         }
2131
2132         if (rsa_enc || (rsa_tmp && rsa_sign))
2133                 mask_k|=SSL_kRSA;
2134         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2135                 emask_k|=SSL_kRSA;
2136
2137 #if 0
2138         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2139         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2140                 (rsa_enc || rsa_sign || dsa_sign))
2141                 mask_k|=SSL_kEDH;
2142         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2143                 (rsa_enc || rsa_sign || dsa_sign))
2144                 emask_k|=SSL_kEDH;
2145 #endif
2146
2147         if (dh_tmp_export)
2148                 emask_k|=SSL_kEDH;
2149
2150         if (dh_tmp)
2151                 mask_k|=SSL_kEDH;
2152
2153         if (dh_rsa) mask_k|=SSL_kDHr;
2154         if (dh_rsa_export) emask_k|=SSL_kDHr;
2155
2156         if (dh_dsa) mask_k|=SSL_kDHd;
2157         if (dh_dsa_export) emask_k|=SSL_kDHd;
2158
2159         if (rsa_enc || rsa_sign)
2160                 {
2161                 mask_a|=SSL_aRSA;
2162                 emask_a|=SSL_aRSA;
2163                 }
2164
2165         if (dsa_sign)
2166                 {
2167                 mask_a|=SSL_aDSS;
2168                 emask_a|=SSL_aDSS;
2169                 }
2170
2171         mask_a|=SSL_aNULL;
2172         emask_a|=SSL_aNULL;
2173
2174 #ifndef OPENSSL_NO_KRB5
2175         mask_k|=SSL_kKRB5;
2176         mask_a|=SSL_aKRB5;
2177         emask_k|=SSL_kKRB5;
2178         emask_a|=SSL_aKRB5;
2179 #endif
2180
2181         /* An ECC certificate may be usable for ECDH and/or
2182          * ECDSA cipher suites depending on the key usage extension.
2183          */
2184         if (have_ecc_cert)
2185                 {
2186                 /* This call populates extension flags (ex_flags) */
2187                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2188                 X509_check_purpose(x, -1, 0);
2189                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2190                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2191                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2192                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2193                 ecc_pkey = X509_get_pubkey(x);
2194                 ecc_pkey_size = (ecc_pkey != NULL) ?
2195                     EVP_PKEY_bits(ecc_pkey) : 0;
2196                 EVP_PKEY_free(ecc_pkey);
2197                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2198                         {
2199                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2200                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2201                         }
2202 #ifndef OPENSSL_NO_ECDH
2203                 if (ecdh_ok)
2204                         {
2205
2206                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2207                                 {
2208                                 mask_k|=SSL_kECDHr;
2209                                 mask_a|=SSL_aECDH;
2210                                 if (ecc_pkey_size <= 163)
2211                                         {
2212                                         emask_k|=SSL_kECDHr;
2213                                         emask_a|=SSL_aECDH;
2214                                         }
2215                                 }
2216
2217                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2218                                 {
2219                                 mask_k|=SSL_kECDHe;
2220                                 mask_a|=SSL_aECDH;
2221                                 if (ecc_pkey_size <= 163)
2222                                         {
2223                                         emask_k|=SSL_kECDHe;
2224                                         emask_a|=SSL_aECDH;
2225                                         }
2226                                 }
2227                         }
2228 #endif
2229 #ifndef OPENSSL_NO_ECDSA
2230                 if (ecdsa_ok)
2231                         {
2232                         mask_a|=SSL_aECDSA;
2233                         emask_a|=SSL_aECDSA;
2234                         }
2235 #endif
2236                 }
2237
2238 #ifndef OPENSSL_NO_ECDH
2239         if (have_ecdh_tmp)
2240                 {
2241                 mask_k|=SSL_kEECDH;
2242                 emask_k|=SSL_kEECDH;
2243                 }
2244 #endif
2245
2246 #ifndef OPENSSL_NO_PSK
2247         mask_k |= SSL_kPSK;
2248         mask_a |= SSL_aPSK;
2249         emask_k |= SSL_kPSK;
2250         emask_a |= SSL_aPSK;
2251 #endif
2252
2253         c->mask_k=mask_k;
2254         c->mask_a=mask_a;
2255         c->export_mask_k=emask_k;
2256         c->export_mask_a=emask_a;
2257         c->valid=1;
2258         }
2259
2260 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2261 #define ku_reject(x, usage) \
2262         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2263
2264 #ifndef OPENSSL_NO_EC
2265
2266 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2267         {
2268         unsigned long alg_k, alg_a;
2269         EVP_PKEY *pkey = NULL;
2270         int keysize = 0;
2271         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2272         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2273
2274         alg_k = cs->algorithm_mkey;
2275         alg_a = cs->algorithm_auth;
2276
2277         if (SSL_C_IS_EXPORT(cs))
2278                 {
2279                 /* ECDH key length in export ciphers must be <= 163 bits */
2280                 pkey = X509_get_pubkey(x);
2281                 if (pkey == NULL) return 0;
2282                 keysize = EVP_PKEY_bits(pkey);
2283                 EVP_PKEY_free(pkey);
2284                 if (keysize > 163) return 0;
2285                 }
2286
2287         /* This call populates the ex_flags field correctly */
2288         X509_check_purpose(x, -1, 0);
2289         if ((x->sig_alg) && (x->sig_alg->algorithm))
2290                 {
2291                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2292                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2293                 }
2294         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2295                 {
2296                 /* key usage, if present, must allow key agreement */
2297                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2298                         {
2299                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2300                         return 0;
2301                         }
2302                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2303                         {
2304                         /* signature alg must be ECDSA */
2305                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2306                                 {
2307                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2308                                 return 0;
2309                                 }
2310                         }
2311                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2312                         {
2313                         /* signature alg must be RSA */
2314
2315                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2316                                 {
2317                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2318                                 return 0;
2319                                 }
2320                         }
2321                 }
2322         if (alg_a & SSL_aECDSA)
2323                 {
2324                 /* key usage, if present, must allow signing */
2325                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2326                         {
2327                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2328                         return 0;
2329                         }
2330                 }
2331
2332         return 1;  /* all checks are ok */
2333         }
2334
2335 #endif
2336
2337 /* THIS NEEDS CLEANING UP */
2338 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2339         {
2340         unsigned long alg_k,alg_a;
2341         CERT *c;
2342         int i;
2343
2344         c=s->cert;
2345         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2346
2347         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2348         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2349
2350         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2351                 {
2352                 /* we don't need to look at SSL_kEECDH
2353                  * since no certificate is needed for
2354                  * anon ECDH and for authenticated
2355                  * EECDH, the check for the auth
2356                  * algorithm will set i correctly
2357                  * NOTE: For ECDH-RSA, we need an ECC
2358                  * not an RSA cert but for EECDH-RSA
2359                  * we need an RSA cert. Placing the
2360                  * checks for SSL_kECDH before RSA
2361                  * checks ensures the correct cert is chosen.
2362                  */
2363                 i=SSL_PKEY_ECC;
2364                 }
2365         else if (alg_a & SSL_aECDSA)
2366                 {
2367                 i=SSL_PKEY_ECC;
2368                 }
2369         else if (alg_k & SSL_kDHr)
2370                 i=SSL_PKEY_DH_RSA;
2371         else if (alg_k & SSL_kDHd)
2372                 i=SSL_PKEY_DH_DSA;
2373         else if (alg_a & SSL_aDSS)
2374                 i=SSL_PKEY_DSA_SIGN;
2375         else if (alg_a & SSL_aRSA)
2376                 {
2377                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2378                         i=SSL_PKEY_RSA_SIGN;
2379                 else
2380                         i=SSL_PKEY_RSA_ENC;
2381                 }
2382         else if (alg_a & SSL_aKRB5)
2383                 {
2384                 /* VRS something else here? */
2385                 return(NULL);
2386                 }
2387         else if (alg_a & SSL_aGOST94)
2388                 i=SSL_PKEY_GOST94;
2389         else if (alg_a & SSL_aGOST01)
2390                 i=SSL_PKEY_GOST01;
2391         else /* if (alg_a & SSL_aNULL) */
2392                 {
2393                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2394                 return(NULL);
2395                 }
2396
2397         return c->pkeys + i;
2398         }
2399
2400 X509 *ssl_get_server_send_cert(const SSL *s)
2401         {
2402         CERT_PKEY *cpk;
2403         cpk = ssl_get_server_send_pkey(s);
2404         if (!cpk)
2405                 return NULL;
2406         return cpk->x509;
2407         }
2408
2409 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2410         {
2411         unsigned long alg_a;
2412         CERT *c;
2413         int idx = -1;
2414
2415         alg_a = cipher->algorithm_auth;
2416         c=s->cert;
2417
2418         if ((alg_a & SSL_aDSS) &&
2419                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2420                 idx = SSL_PKEY_DSA_SIGN;
2421         else if (alg_a & SSL_aRSA)
2422                 {
2423                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2424                         idx = SSL_PKEY_RSA_SIGN;
2425                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2426                         idx = SSL_PKEY_RSA_ENC;
2427                 }
2428         else if ((alg_a & SSL_aECDSA) &&
2429                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2430                 idx = SSL_PKEY_ECC;
2431         if (idx == -1)
2432                 {
2433                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2434                 return(NULL);
2435                 }
2436         if (pmd)
2437                 *pmd = c->pkeys[idx].digest;
2438         return c->pkeys[idx].privatekey;
2439         }
2440
2441 void ssl_update_cache(SSL *s,int mode)
2442         {
2443         int i;
2444
2445         /* If the session_id_length is 0, we are not supposed to cache it,
2446          * and it would be rather hard to do anyway :-) */
2447         if (s->session->session_id_length == 0) return;
2448
2449         i=s->session_ctx->session_cache_mode;
2450         if ((i & mode) && (!s->hit)
2451                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2452                     || SSL_CTX_add_session(s->session_ctx,s->session))
2453                 && (s->session_ctx->new_session_cb != NULL))
2454                 {
2455                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2456                 if (!s->session_ctx->new_session_cb(s,s->session))
2457                         SSL_SESSION_free(s->session);
2458                 }
2459
2460         /* auto flush every 255 connections */
2461         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2462                 ((i & mode) == mode))
2463                 {
2464                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2465                         ?s->session_ctx->stats.sess_connect_good
2466                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2467                         {
2468                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2469                         }
2470                 }
2471         }
2472
2473 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2474         {
2475         return(s->method);
2476         }
2477
2478 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2479         {
2480         int conn= -1;
2481         int ret=1;
2482
2483         if (s->method != meth)
2484                 {
2485                 if (s->handshake_func != NULL)
2486                         conn=(s->handshake_func == s->method->ssl_connect);
2487
2488                 if (s->method->version == meth->version)
2489                         s->method=meth;
2490                 else
2491                         {
2492                         s->method->ssl_free(s);
2493                         s->method=meth;
2494                         ret=s->method->ssl_new(s);
2495                         }
2496
2497                 if (conn == 1)
2498                         s->handshake_func=meth->ssl_connect;
2499                 else if (conn == 0)
2500                         s->handshake_func=meth->ssl_accept;
2501                 }
2502         return(ret);
2503         }
2504
2505 int SSL_get_error(const SSL *s,int i)
2506         {
2507         int reason;
2508         unsigned long l;
2509         BIO *bio;
2510
2511         if (i > 0) return(SSL_ERROR_NONE);
2512
2513         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2514          * etc, where we do encode the error */
2515         if ((l=ERR_peek_error()) != 0)
2516                 {
2517                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2518                         return(SSL_ERROR_SYSCALL);
2519                 else
2520                         return(SSL_ERROR_SSL);
2521                 }
2522
2523         if ((i < 0) && SSL_want_read(s))
2524                 {
2525                 bio=SSL_get_rbio(s);
2526                 if (BIO_should_read(bio))
2527                         return(SSL_ERROR_WANT_READ);
2528                 else if (BIO_should_write(bio))
2529                         /* This one doesn't make too much sense ... We never try
2530                          * to write to the rbio, and an application program where
2531                          * rbio and wbio are separate couldn't even know what it
2532                          * should wait for.
2533                          * However if we ever set s->rwstate incorrectly
2534                          * (so that we have SSL_want_read(s) instead of
2535                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2536                          * this test works around that bug; so it might be safer
2537                          * to keep it. */
2538                         return(SSL_ERROR_WANT_WRITE);
2539                 else if (BIO_should_io_special(bio))
2540                         {
2541                         reason=BIO_get_retry_reason(bio);
2542                         if (reason == BIO_RR_CONNECT)
2543                                 return(SSL_ERROR_WANT_CONNECT);
2544                         else if (reason == BIO_RR_ACCEPT)
2545                                 return(SSL_ERROR_WANT_ACCEPT);
2546                         else
2547                                 return(SSL_ERROR_SYSCALL); /* unknown */
2548                         }
2549                 }
2550
2551         if ((i < 0) && SSL_want_write(s))
2552                 {
2553                 bio=SSL_get_wbio(s);
2554                 if (BIO_should_write(bio))
2555                         return(SSL_ERROR_WANT_WRITE);
2556                 else if (BIO_should_read(bio))
2557                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2558                         return(SSL_ERROR_WANT_READ);
2559                 else if (BIO_should_io_special(bio))
2560                         {
2561                         reason=BIO_get_retry_reason(bio);
2562                         if (reason == BIO_RR_CONNECT)
2563                                 return(SSL_ERROR_WANT_CONNECT);
2564                         else if (reason == BIO_RR_ACCEPT)
2565                                 return(SSL_ERROR_WANT_ACCEPT);
2566                         else
2567                                 return(SSL_ERROR_SYSCALL);
2568                         }
2569                 }
2570         if ((i < 0) && SSL_want_x509_lookup(s))
2571                 {
2572                 return(SSL_ERROR_WANT_X509_LOOKUP);
2573                 }
2574
2575         if (i == 0)
2576                 {
2577                 if (s->version == SSL2_VERSION)
2578                         {
2579                         /* assume it is the socket being closed */
2580                         return(SSL_ERROR_ZERO_RETURN);
2581                         }
2582                 else
2583                         {
2584                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2585                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2586                                 return(SSL_ERROR_ZERO_RETURN);
2587                         }
2588                 }
2589         return(SSL_ERROR_SYSCALL);
2590         }
2591
2592 int SSL_do_handshake(SSL *s)
2593         {
2594         int ret=1;
2595
2596         if (s->handshake_func == NULL)
2597                 {
2598                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2599                 return(-1);
2600                 }
2601
2602         s->method->ssl_renegotiate_check(s);
2603
2604         if (SSL_in_init(s) || SSL_in_before(s))
2605                 {
2606                 ret=s->handshake_func(s);
2607                 }
2608         return(ret);
2609         }
2610
2611 /* For the next 2 functions, SSL_clear() sets shutdown and so
2612  * one of these calls will reset it */
2613 void SSL_set_accept_state(SSL *s)
2614         {
2615         s->server=1;
2616         s->shutdown=0;
2617         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2618         s->handshake_func=s->method->ssl_accept;
2619         /* clear the current cipher */
2620         ssl_clear_cipher_ctx(s);
2621         ssl_clear_hash_ctx(&s->read_hash);
2622         ssl_clear_hash_ctx(&s->write_hash);
2623         }
2624
2625 void SSL_set_connect_state(SSL *s)
2626         {
2627         s->server=0;
2628         s->shutdown=0;
2629         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2630         s->handshake_func=s->method->ssl_connect;
2631         /* clear the current cipher */
2632         ssl_clear_cipher_ctx(s);
2633         ssl_clear_hash_ctx(&s->read_hash);
2634         ssl_clear_hash_ctx(&s->write_hash);
2635         }
2636
2637 int ssl_undefined_function(SSL *s)
2638         {
2639         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2640         return(0);
2641         }
2642
2643 int ssl_undefined_void_function(void)
2644         {
2645         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2646         return(0);
2647         }
2648
2649 int ssl_undefined_const_function(const SSL *s)
2650         {
2651         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2652         return(0);
2653         }
2654
2655 SSL_METHOD *ssl_bad_method(int ver)
2656         {
2657         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2658         return(NULL);
2659         }
2660
2661 const char *SSL_get_version(const SSL *s)
2662         {
2663         if (s->version == TLS1_2_VERSION)
2664                 return("TLSv1.2");
2665         else if (s->version == TLS1_1_VERSION)
2666                 return("TLSv1.1");
2667         else if (s->version == TLS1_VERSION)
2668                 return("TLSv1");
2669         else if (s->version == SSL3_VERSION)
2670                 return("SSLv3");
2671         else if (s->version == SSL2_VERSION)
2672                 return("SSLv2");
2673         else
2674                 return("unknown");
2675         }
2676
2677 SSL *SSL_dup(SSL *s)
2678         {
2679         STACK_OF(X509_NAME) *sk;
2680         X509_NAME *xn;
2681         SSL *ret;
2682         int i;
2683
2684         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2685             return(NULL);
2686
2687         ret->version = s->version;
2688         ret->type = s->type;
2689         ret->method = s->method;
2690
2691         if (s->session != NULL)
2692                 {
2693                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2694                 SSL_copy_session_id(ret,s);
2695                 }
2696         else
2697                 {
2698                 /* No session has been established yet, so we have to expect
2699                  * that s->cert or ret->cert will be changed later --
2700                  * they should not both point to the same object,
2701                  * and thus we can't use SSL_copy_session_id. */
2702
2703                 ret->method->ssl_free(ret);
2704                 ret->method = s->method;
2705                 ret->method->ssl_new(ret);
2706
2707                 if (s->cert != NULL)
2708                         {
2709                         if (ret->cert != NULL)
2710                                 {
2711                                 ssl_cert_free(ret->cert);
2712                                 }
2713                         ret->cert = ssl_cert_dup(s->cert);
2714                         if (ret->cert == NULL)
2715                                 goto err;
2716                         }
2717
2718                 SSL_set_session_id_context(ret,
2719                         s->sid_ctx, s->sid_ctx_length);
2720                 }
2721
2722         ret->options=s->options;
2723         ret->mode=s->mode;
2724         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2725         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2726         ret->msg_callback = s->msg_callback;
2727         ret->msg_callback_arg = s->msg_callback_arg;
2728         SSL_set_verify(ret,SSL_get_verify_mode(s),
2729                 SSL_get_verify_callback(s));
2730         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2731         ret->generate_session_id = s->generate_session_id;
2732
2733         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2734
2735         ret->debug=s->debug;
2736
2737         /* copy app data, a little dangerous perhaps */
2738         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2739                 goto err;
2740
2741         /* setup rbio, and wbio */
2742         if (s->rbio != NULL)
2743                 {
2744                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2745                         goto err;
2746                 }
2747         if (s->wbio != NULL)
2748                 {
2749                 if (s->wbio != s->rbio)
2750                         {
2751                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2752                                 goto err;
2753                         }
2754                 else
2755                         ret->wbio=ret->rbio;
2756                 }
2757         ret->rwstate = s->rwstate;
2758         ret->in_handshake = s->in_handshake;
2759         ret->handshake_func = s->handshake_func;
2760         ret->server = s->server;
2761         ret->renegotiate = s->renegotiate;
2762         ret->new_session = s->new_session;
2763         ret->quiet_shutdown = s->quiet_shutdown;
2764         ret->shutdown=s->shutdown;
2765         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2766         ret->rstate=s->rstate;
2767         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2768         ret->hit=s->hit;
2769
2770         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2771
2772         /* dup the cipher_list and cipher_list_by_id stacks */
2773         if (s->cipher_list != NULL)
2774                 {
2775                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2776                         goto err;
2777                 }
2778         if (s->cipher_list_by_id != NULL)
2779                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2780                         == NULL)
2781                         goto err;
2782
2783         /* Dup the client_CA list */
2784         if (s->client_CA != NULL)
2785                 {
2786                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2787                 ret->client_CA=sk;
2788                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2789                         {
2790                         xn=sk_X509_NAME_value(sk,i);
2791                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2792                                 {
2793                                 X509_NAME_free(xn);
2794                                 goto err;
2795                                 }
2796                         }
2797                 }
2798
2799         if (0)
2800                 {
2801 err:
2802                 if (ret != NULL) SSL_free(ret);
2803                 ret=NULL;
2804                 }
2805         return(ret);
2806         }
2807
2808 void ssl_clear_cipher_ctx(SSL *s)
2809         {
2810         if (s->enc_read_ctx != NULL)
2811                 {
2812                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2813                 OPENSSL_free(s->enc_read_ctx);
2814                 s->enc_read_ctx=NULL;
2815                 }
2816         if (s->enc_write_ctx != NULL)
2817                 {
2818                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2819                 OPENSSL_free(s->enc_write_ctx);
2820                 s->enc_write_ctx=NULL;
2821                 }
2822 #ifndef OPENSSL_NO_COMP
2823         if (s->expand != NULL)
2824                 {
2825                 COMP_CTX_free(s->expand);
2826                 s->expand=NULL;
2827                 }
2828         if (s->compress != NULL)
2829                 {
2830                 COMP_CTX_free(s->compress);
2831                 s->compress=NULL;
2832                 }
2833 #endif
2834         }
2835
2836 /* Fix this function so that it takes an optional type parameter */
2837 X509 *SSL_get_certificate(const SSL *s)
2838         {
2839         if (s->cert != NULL)
2840                 return(s->cert->key->x509);
2841         else
2842                 return(NULL);
2843         }
2844
2845 /* Fix this function so that it takes an optional type parameter */
2846 EVP_PKEY *SSL_get_privatekey(SSL *s)
2847         {
2848         if (s->cert != NULL)
2849                 return(s->cert->key->privatekey);
2850         else
2851                 return(NULL);
2852         }
2853
2854 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2855         {
2856         if ((s->session != NULL) && (s->session->cipher != NULL))
2857                 return(s->session->cipher);
2858         return(NULL);
2859         }
2860 #ifdef OPENSSL_NO_COMP
2861 const void *SSL_get_current_compression(SSL *s)
2862         {
2863         return NULL;
2864         }
2865 const void *SSL_get_current_expansion(SSL *s)
2866         {
2867         return NULL;
2868         }
2869 #else
2870
2871 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2872         {
2873         if (s->compress != NULL)
2874                 return(s->compress->meth);
2875         return(NULL);
2876         }
2877
2878 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2879         {
2880         if (s->expand != NULL)
2881                 return(s->expand->meth);
2882         return(NULL);
2883         }
2884 #endif
2885
2886 int ssl_init_wbio_buffer(SSL *s,int push)
2887         {
2888         BIO *bbio;
2889
2890         if (s->bbio == NULL)
2891                 {
2892                 bbio=BIO_new(BIO_f_buffer());
2893                 if (bbio == NULL) return(0);
2894                 s->bbio=bbio;
2895                 }
2896         else
2897                 {
2898                 bbio=s->bbio;
2899                 if (s->bbio == s->wbio)
2900                         s->wbio=BIO_pop(s->wbio);
2901                 }
2902         (void)BIO_reset(bbio);
2903 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2904         if (!BIO_set_read_buffer_size(bbio,1))
2905                 {
2906                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2907                 return(0);
2908                 }
2909         if (push)
2910                 {
2911                 if (s->wbio != bbio)
2912                         s->wbio=BIO_push(bbio,s->wbio);
2913                 }
2914         else
2915                 {
2916                 if (s->wbio == bbio)
2917                         s->wbio=BIO_pop(bbio);
2918                 }
2919         return(1);
2920         }
2921
2922 void ssl_free_wbio_buffer(SSL *s)
2923         {
2924         if (s->bbio == NULL) return;
2925
2926         if (s->bbio == s->wbio)
2927                 {
2928                 /* remove buffering */
2929                 s->wbio=BIO_pop(s->wbio);
2930 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2931                 assert(s->wbio != NULL);
2932 #endif
2933         }
2934         BIO_free(s->bbio);
2935         s->bbio=NULL;
2936         }
2937
2938 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2939         {
2940         ctx->quiet_shutdown=mode;
2941         }
2942
2943 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2944         {
2945         return(ctx->quiet_shutdown);
2946         }
2947
2948 void SSL_set_quiet_shutdown(SSL *s,int mode)
2949         {
2950         s->quiet_shutdown=mode;
2951         }
2952
2953 int SSL_get_quiet_shutdown(const SSL *s)
2954         {
2955         return(s->quiet_shutdown);
2956         }
2957
2958 void SSL_set_shutdown(SSL *s,int mode)
2959         {
2960         s->shutdown=mode;
2961         }
2962
2963 int SSL_get_shutdown(const SSL *s)
2964         {
2965         return(s->shutdown);
2966         }
2967
2968 int SSL_version(const SSL *s)
2969         {
2970         return(s->version);
2971         }
2972
2973 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2974         {
2975         return(ssl->ctx);
2976         }
2977
2978 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2979         {
2980         CERT *ocert = ssl->cert;
2981         if (ssl->ctx == ctx)
2982                 return ssl->ctx;
2983 #ifndef OPENSSL_NO_TLSEXT
2984         if (ctx == NULL)
2985                 ctx = ssl->initial_ctx;
2986 #endif
2987         ssl->cert = ssl_cert_dup(ctx->cert);
2988         if (ocert != NULL)
2989                 {
2990                 int i;
2991                 /* Copy negotiated digests from original */
2992                 for (i = 0; i < SSL_PKEY_NUM; i++)
2993                         {
2994                         CERT_PKEY *cpk = ocert->pkeys + i;
2995                         CERT_PKEY *rpk = ssl->cert->pkeys + i;
2996                         rpk->digest = cpk->digest;
2997                         }
2998                 ssl_cert_free(ocert);
2999                 }
3000         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3001         if (ssl->ctx != NULL)
3002                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3003         ssl->ctx = ctx;
3004         return(ssl->ctx);
3005         }
3006
3007 #ifndef OPENSSL_NO_STDIO
3008 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3009         {
3010         return(X509_STORE_set_default_paths(ctx->cert_store));
3011         }
3012
3013 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3014                 const char *CApath)
3015         {
3016         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3017         }
3018 #endif
3019
3020 void SSL_set_info_callback(SSL *ssl,
3021         void (*cb)(const SSL *ssl,int type,int val))
3022         {
3023         ssl->info_callback=cb;
3024         }
3025
3026 /* One compiler (Diab DCC) doesn't like argument names in returned
3027    function pointer.  */
3028 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3029         {
3030         return ssl->info_callback;
3031         }
3032
3033 int SSL_state(const SSL *ssl)
3034         {
3035         return(ssl->state);
3036         }
3037
3038 void SSL_set_state(SSL *ssl, int state)
3039         {
3040         ssl->state = state;
3041         }
3042
3043 void SSL_set_verify_result(SSL *ssl,long arg)
3044         {
3045         ssl->verify_result=arg;
3046         }
3047
3048 long SSL_get_verify_result(const SSL *ssl)
3049         {
3050         return(ssl->verify_result);
3051         }
3052
3053 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3054                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3055         {
3056         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3057                                 new_func, dup_func, free_func);
3058         }
3059
3060 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3061         {
3062         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3063         }
3064
3065 void *SSL_get_ex_data(const SSL *s,int idx)
3066         {
3067         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3068         }
3069
3070 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3071                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3072         {
3073         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3074                                 new_func, dup_func, free_func);
3075         }
3076
3077 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3078         {
3079         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3080         }
3081
3082 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3083         {
3084         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3085         }
3086
3087 int ssl_ok(SSL *s)
3088         {
3089         return(1);
3090         }
3091
3092 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3093         {
3094         return(ctx->cert_store);
3095         }
3096
3097 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3098         {
3099         if (ctx->cert_store != NULL)
3100                 X509_STORE_free(ctx->cert_store);
3101         ctx->cert_store=store;
3102         }
3103
3104 int SSL_want(const SSL *s)
3105         {
3106         return(s->rwstate);
3107         }
3108
3109 /*!
3110  * \brief Set the callback for generating temporary RSA keys.
3111  * \param ctx the SSL context.
3112  * \param cb the callback
3113  */
3114
3115 #ifndef OPENSSL_NO_RSA
3116 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3117                                                           int is_export,
3118                                                           int keylength))
3119     {
3120     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3121     }
3122
3123 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3124                                                   int is_export,
3125                                                   int keylength))
3126     {
3127     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3128     }
3129 #endif
3130
3131 #ifdef DOXYGEN
3132 /*!
3133  * \brief The RSA temporary key callback function.
3134  * \param ssl the SSL session.
3135  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3136  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3137  * of the required key in bits.
3138  * \return the temporary RSA key.
3139  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3140  */
3141
3142 RSA *cb(SSL *ssl,int is_export,int keylength)
3143     {}
3144 #endif
3145
3146 /*!
3147  * \brief Set the callback for generating temporary DH keys.
3148  * \param ctx the SSL context.
3149  * \param dh the callback
3150  */
3151
3152 #ifndef OPENSSL_NO_DH
3153 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3154                                                         int keylength))
3155         {
3156         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3157         }
3158
3159 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3160                                                 int keylength))
3161         {
3162         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3163         }
3164 #endif
3165
3166 #ifndef OPENSSL_NO_ECDH
3167 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3168                                                                 int keylength))
3169         {
3170         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3171         }
3172
3173 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3174                                                         int keylength))
3175         {
3176         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3177         }
3178 #endif
3179
3180 #ifndef OPENSSL_NO_PSK
3181 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3182         {
3183         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3184                 {
3185                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3186                 return 0;
3187                 }
3188         if (ctx->psk_identity_hint != NULL)
3189                 OPENSSL_free(ctx->psk_identity_hint);
3190         if (identity_hint != NULL)
3191                 {
3192                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3193                 if (ctx->psk_identity_hint == NULL)
3194                         return 0;
3195                 }
3196         else
3197                 ctx->psk_identity_hint = NULL;
3198         return 1;
3199         }
3200
3201 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3202         {
3203         if (s == NULL)
3204                 return 0;
3205
3206         if (s->session == NULL)
3207                 return 1; /* session not created yet, ignored */
3208
3209         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3210                 {
3211                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3212                 return 0;
3213                 }
3214         if (s->session->psk_identity_hint != NULL)
3215                 OPENSSL_free(s->session->psk_identity_hint);
3216         if (identity_hint != NULL)
3217                 {
3218                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3219                 if (s->session->psk_identity_hint == NULL)
3220                         return 0;
3221                 }
3222         else
3223                 s->session->psk_identity_hint = NULL;
3224         return 1;
3225         }
3226
3227 const char *SSL_get_psk_identity_hint(const SSL *s)
3228         {
3229         if (s == NULL || s->session == NULL)
3230                 return NULL;
3231         return(s->session->psk_identity_hint);
3232         }
3233
3234 const char *SSL_get_psk_identity(const SSL *s)
3235         {
3236         if (s == NULL || s->session == NULL)
3237                 return NULL;
3238         return(s->session->psk_identity);
3239         }
3240
3241 void SSL_set_psk_client_callback(SSL *s,
3242     unsigned int (*cb)(SSL *ssl, const char *hint,
3243                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3244                        unsigned int max_psk_len))
3245         {
3246         s->psk_client_callback = cb;
3247         }
3248
3249 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3250     unsigned int (*cb)(SSL *ssl, const char *hint,
3251                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3252                        unsigned int max_psk_len))
3253         {
3254         ctx->psk_client_callback = cb;
3255         }
3256
3257 void SSL_set_psk_server_callback(SSL *s,
3258     unsigned int (*cb)(SSL *ssl, const char *identity,
3259                        unsigned char *psk, unsigned int max_psk_len))
3260         {
3261         s->psk_server_callback = cb;
3262         }
3263
3264 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3265     unsigned int (*cb)(SSL *ssl, const char *identity,
3266                        unsigned char *psk, unsigned int max_psk_len))
3267         {
3268         ctx->psk_server_callback = cb;
3269         }
3270 #endif
3271
3272 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))
3273         {
3274         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3275         }
3276 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))
3277         {
3278         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3279         }
3280
3281 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3282  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3283  * any. If EVP_MD pointer is passed, initializes ctx with this md
3284  * Returns newly allocated ctx;
3285  */
3286
3287 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3288 {
3289         ssl_clear_hash_ctx(hash);
3290         *hash = EVP_MD_CTX_create();
3291         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3292         return *hash;
3293 }
3294 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3295 {
3296
3297         if (*hash) EVP_MD_CTX_destroy(*hash);
3298         *hash=NULL;
3299 }
3300
3301 void SSL_set_debug(SSL *s, int debug)
3302         {
3303         s->debug = debug;
3304         }
3305
3306 int SSL_cache_hit(SSL *s)
3307         {
3308         return s->hit;
3309         }
3310
3311 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3312 #include "../crypto/bio/bss_file.c"
3313 #endif
3314
3315 IMPLEMENT_STACK_OF(SSL_CIPHER)
3316 IMPLEMENT_STACK_OF(SSL_COMP)
3317 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3318                                     ssl_cipher_id);