ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function,
 180         (int (*)(SSL *, unsigned char *, size_t, const char *,
 181                  size_t, const unsigned char *, size_t,
 182                  int use_context)) ssl_undefined_function,
 183         };
 184
 185 int SSL_clear(SSL *s)
 186         {
 187
 188         if (s->method == NULL)
 189                 {
 190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 191                 return(0);
 192                 }
 193
 194         if (ssl_clear_bad_session(s))
 195                 {
 196                 SSL_SESSION_free(s->session);
 197                 s->session=NULL;
 198                 }
 199
 200         s->error=0;
 201         s->hit=0;
 202         s->shutdown=0;
 203
 204 #if 0 /* Disabled since version 1.10 of this file (early return not
 205        * needed because SSL_clear is not called when doing renegotiation) */
 206         /* This is set if we are doing dynamic renegotiation so keep
 207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 208         if (s->renegotiate) return(1);
 209 #else
 210         if (s->renegotiate)
 211                 {
 212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 213                 return 0;
 214                 }
 215 #endif
 216
 217         s->type=0;
 218
 219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 220
 221         s->version=s->method->version;
 222         s->client_version=s->version;
 223         s->rwstate=SSL_NOTHING;
 224         s->rstate=SSL_ST_READ_HEADER;
 225 #if 0
 226         s->read_ahead=s->ctx->read_ahead;
 227 #endif
 228
 229         if (s->init_buf != NULL)
 230                 {
 231                 BUF_MEM_free(s->init_buf);
 232                 s->init_buf=NULL;
 233                 }
 234
 235         ssl_clear_cipher_ctx(s);
 236         ssl_clear_hash_ctx(&s->read_hash);
 237         ssl_clear_hash_ctx(&s->write_hash);
 238
 239         s->first_packet=0;
 240
 241 #if 1
 242         /* Check to see if we were changed into a different method, if
 243          * so, revert back if we are not doing session-id reuse. */
 244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 245                 {
 246                 s->method->ssl_free(s);
 247                 s->method=s->ctx->method;
 248                 if (!s->method->ssl_new(s))
 249                         return(0);
 250                 }
 251         else
 252 #endif
 253                 s->method->ssl_clear(s);
 254         return(1);
 255         }
 256
 257 /** Used to change an SSL_CTXs default SSL method type */
 258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 259         {
 260         STACK_OF(SSL_CIPHER) *sk;
 261
 262         ctx->method=meth;
 263
 264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 265                 &(ctx->cipher_list_by_id),
 266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 268                 {
 269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274
 275 SSL *SSL_new(SSL_CTX *ctx)
 276         {
 277         SSL *s;
 278
 279         if (ctx == NULL)
 280                 {
 281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 282                 return(NULL);
 283                 }
 284         if (ctx->method == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 287                 return(NULL);
 288                 }
 289
 290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 291         if (s == NULL) goto err;
 292         memset(s,0,sizeof(SSL));
 293
 294 #ifndef OPENSSL_NO_KRB5
 295         s->kssl_ctx = kssl_ctx_new();
 296 #endif  /* OPENSSL_NO_KRB5 */
 297
 298         s->options=ctx->options;
 299         s->mode=ctx->mode;
 300         s->max_cert_list=ctx->max_cert_list;
 301
 302         if (ctx->cert != NULL)
 303                 {
 304                 /* Earlier library versions used to copy the pointer to
 305                  * the CERT, not its contents; only when setting new
 306                  * parameters for the per-SSL copy, ssl_cert_new would be
 307                  * called (and the direct reference to the per-SSL_CTX
 308                  * settings would be lost, but those still were indirectly
 309                  * accessed for various purposes, and for that reason they
 310                  * used to be known as s->ctx->default_cert).
 311                  * Now we don't look at the SSL_CTX's CERT after having
 312                  * duplicated it once. */
 313
 314                 s->cert = ssl_cert_dup(ctx->cert);
 315                 if (s->cert == NULL)
 316                         goto err;
 317                 }
 318         else
 319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 320
 321         s->read_ahead=ctx->read_ahead;
 322         s->msg_callback=ctx->msg_callback;
 323         s->msg_callback_arg=ctx->msg_callback_arg;
 324         s->verify_mode=ctx->verify_mode;
 325 #if 0
 326         s->verify_depth=ctx->verify_depth;
 327 #endif
 328         s->sid_ctx_length=ctx->sid_ctx_length;
 329         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 330         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 331         s->verify_callback=ctx->default_verify_callback;
 332         s->generate_session_id=ctx->generate_session_id;
 333
 334         s->param = X509_VERIFY_PARAM_new();
 335         if (!s->param)
 336                 goto err;
 337         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 338 #if 0
 339         s->purpose = ctx->purpose;
 340         s->trust = ctx->trust;
 341 #endif
 342         s->quiet_shutdown=ctx->quiet_shutdown;
 343         s->max_send_fragment = ctx->max_send_fragment;
 344
 345         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 346         s->ctx=ctx;
 347 #ifndef OPENSSL_NO_TLSEXT
 348         s->tlsext_debug_cb = 0;
 349         s->tlsext_debug_arg = NULL;
 350         s->tlsext_ticket_expected = 0;
 351         s->tlsext_status_type = -1;
 352         s->tlsext_status_expected = 0;
 353         s->tlsext_ocsp_ids = NULL;
 354         s->tlsext_ocsp_exts = NULL;
 355         s->tlsext_ocsp_resp = NULL;
 356         s->tlsext_ocsp_resplen = -1;
 357         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 358         s->initial_ctx=ctx;
 359 #ifndef OPENSSL_NO_EC
 360         if (ctx->tlsext_ecpointformatlist)
 361                 {
 362                 s->tlsext_ecpointformatlist =
 363                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 364                                         ctx->tlsext_ecpointformatlist_length);
 365                 if (!s->tlsext_ecpointformatlist)
 366                         goto err;
 367                 s->tlsext_ecpointformatlist_length =
 368                                         ctx->tlsext_ecpointformatlist_length;
 369                 }
 370         if (ctx->tlsext_ellipticcurvelist)
 371                 {
 372                 s->tlsext_ellipticcurvelist =
 373                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 374                                         ctx->tlsext_ellipticcurvelist_length);
 375                 if (!s->tlsext_ellipticcurvelist)
 376                         goto err;
 377                 s->tlsext_ellipticcurvelist_length =
 378                                         ctx->tlsext_ellipticcurvelist_length;
 379                 }
 380 #endif
 381 # ifndef OPENSSL_NO_NEXTPROTONEG
 382         s->next_proto_negotiated = NULL;
 383 # endif
 384 #endif
 385
 386         s->verify_result=X509_V_OK;
 387
 388         s->method=ctx->method;
 389
 390         if (!s->method->ssl_new(s))
 391                 goto err;
 392
 393         s->references=1;
 394         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 395
 396         SSL_clear(s);
 397
 398         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 399
 400 #ifndef OPENSSL_NO_PSK
 401         s->psk_client_callback=ctx->psk_client_callback;
 402         s->psk_server_callback=ctx->psk_server_callback;
 403 #endif
 404
 405         return(s);
 406 err:
 407         if (s != NULL)
 408                 {
 409                 if (s->cert != NULL)
 410                         ssl_cert_free(s->cert);
 411                 if (s->ctx != NULL)
 412                         SSL_CTX_free(s->ctx); /* decrement reference count */
 413                 OPENSSL_free(s);
 414                 }
 415         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 416         return(NULL);
 417         }
 418
 419 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 420                                    unsigned int sid_ctx_len)
 421     {
 422     if(sid_ctx_len > sizeof ctx->sid_ctx)
 423         {
 424         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 425         return 0;
 426         }
 427     ctx->sid_ctx_length=sid_ctx_len;
 428     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 429
 430     return 1;
 431     }
 432
 433 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 434                                unsigned int sid_ctx_len)
 435     {
 436     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 437         {
 438         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 439         return 0;
 440         }
 441     ssl->sid_ctx_length=sid_ctx_len;
 442     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 443
 444     return 1;
 445     }
 446
 447 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 448         {
 449         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 450         ctx->generate_session_id = cb;
 451         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 452         return 1;
 453         }
 454
 455 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 456         {
 457         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 458         ssl->generate_session_id = cb;
 459         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 460         return 1;
 461         }
 462
 463 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 464                                 unsigned int id_len)
 465         {
 466         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 467          * we can "construct" a session to give us the desired check - ie. to
 468          * find if there's a session in the hash table that would conflict with
 469          * any new session built out of this id/id_len and the ssl_version in
 470          * use by this SSL. */
 471         SSL_SESSION r, *p;
 472
 473         if(id_len > sizeof r.session_id)
 474                 return 0;
 475
 476         r.ssl_version = ssl->version;
 477         r.session_id_length = id_len;
 478         memcpy(r.session_id, id, id_len);
 479         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 480          * callback is calling us to check the uniqueness of a shorter ID, it
 481          * must be compared as a padded-out ID because that is what it will be
 482          * converted to when the callback has finished choosing it. */
 483         if((r.ssl_version == SSL2_VERSION) &&
 484                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 485                 {
 486                 memset(r.session_id + id_len, 0,
 487                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 488                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 489                 }
 490
 491         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 492         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 493         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 494         return (p != NULL);
 495         }
 496
 497 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 498         {
 499         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 500         }
 501
 502 int SSL_set_purpose(SSL *s, int purpose)
 503         {
 504         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 505         }
 506
 507 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 508         {
 509         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 510         }
 511
 512 int SSL_set_trust(SSL *s, int trust)
 513         {
 514         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 515         }
 516
 517 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 518         {
 519         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 520         }
 521
 522 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 523         {
 524         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 525         }
 526
 527 void SSL_certs_clear(SSL *s)
 528         {
 529         ssl_cert_clear_certs(s->cert);
 530         }
 531
 532 void SSL_free(SSL *s)
 533         {
 534         int i;
 535
 536         if(s == NULL)
 537             return;
 538
 539         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 540 #ifdef REF_PRINT
 541         REF_PRINT("SSL",s);
 542 #endif
 543         if (i > 0) return;
 544 #ifdef REF_CHECK
 545         if (i < 0)
 546                 {
 547                 fprintf(stderr,"SSL_free, bad reference count\n");
 548                 abort(); /* ok */
 549                 }
 550 #endif
 551
 552         if (s->param)
 553                 X509_VERIFY_PARAM_free(s->param);
 554
 555         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 556
 557         if (s->bbio != NULL)
 558                 {
 559                 /* If the buffering BIO is in place, pop it off */
 560                 if (s->bbio == s->wbio)
 561                         {
 562                         s->wbio=BIO_pop(s->wbio);
 563                         }
 564                 BIO_free(s->bbio);
 565                 s->bbio=NULL;
 566                 }
 567         if (s->rbio != NULL)
 568                 BIO_free_all(s->rbio);
 569         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 570                 BIO_free_all(s->wbio);
 571
 572         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 573
 574         /* add extra stuff */
 575         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 576         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 577
 578         /* Make the next call work :-) */
 579         if (s->session != NULL)
 580                 {
 581                 ssl_clear_bad_session(s);
 582                 SSL_SESSION_free(s->session);
 583                 }
 584
 585         ssl_clear_cipher_ctx(s);
 586         ssl_clear_hash_ctx(&s->read_hash);
 587         ssl_clear_hash_ctx(&s->write_hash);
 588
 589         if (s->cert != NULL) ssl_cert_free(s->cert);
 590         /* Free up if allocated */
 591
 592 #ifndef OPENSSL_NO_TLSEXT
 593         if (s->tlsext_hostname)
 594                 OPENSSL_free(s->tlsext_hostname);
 595         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 596 #ifndef OPENSSL_NO_EC
 597         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 598         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 599 #endif /* OPENSSL_NO_EC */
 600         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 601         if (s->tlsext_ocsp_exts)
 602                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 603                                                 X509_EXTENSION_free);
 604         if (s->tlsext_ocsp_ids)
 605                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 606         if (s->tlsext_ocsp_resp)
 607                 OPENSSL_free(s->tlsext_ocsp_resp);
 608 #endif
 609
 610         if (s->client_CA != NULL)
 611                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 612
 613         if (s->method != NULL) s->method->ssl_free(s);
 614
 615         if (s->ctx) SSL_CTX_free(s->ctx);
 616
 617 #ifndef OPENSSL_NO_KRB5
 618         if (s->kssl_ctx != NULL)
 619                 kssl_ctx_free(s->kssl_ctx);
 620 #endif  /* OPENSSL_NO_KRB5 */
 621
 622 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 623         if (s->next_proto_negotiated)
 624                 OPENSSL_free(s->next_proto_negotiated);
 625 #endif
 626
 627         if (s->srtp_profiles)
 628             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 629
 630         OPENSSL_free(s);
 631         }
 632
 633 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 634         {
 635         /* If the output buffering BIO is still in place, remove it
 636          */
 637         if (s->bbio != NULL)
 638                 {
 639                 if (s->wbio == s->bbio)
 640                         {
 641                         s->wbio=s->wbio->next_bio;
 642                         s->bbio->next_bio=NULL;
 643                         }
 644                 }
 645         if ((s->rbio != NULL) && (s->rbio != rbio))
 646                 BIO_free_all(s->rbio);
 647         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 648                 BIO_free_all(s->wbio);
 649         s->rbio=rbio;
 650         s->wbio=wbio;
 651         }
 652
 653 BIO *SSL_get_rbio(const SSL *s)
 654         { return(s->rbio); }
 655
 656 BIO *SSL_get_wbio(const SSL *s)
 657         { return(s->wbio); }
 658
 659 int SSL_get_fd(const SSL *s)
 660         {
 661         return(SSL_get_rfd(s));
 662         }
 663
 664 int SSL_get_rfd(const SSL *s)
 665         {
 666         int ret= -1;
 667         BIO *b,*r;
 668
 669         b=SSL_get_rbio(s);
 670         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 671         if (r != NULL)
 672                 BIO_get_fd(r,&ret);
 673         return(ret);
 674         }
 675
 676 int SSL_get_wfd(const SSL *s)
 677         {
 678         int ret= -1;
 679         BIO *b,*r;
 680
 681         b=SSL_get_wbio(s);
 682         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 683         if (r != NULL)
 684                 BIO_get_fd(r,&ret);
 685         return(ret);
 686         }
 687
 688 #ifndef OPENSSL_NO_SOCK
 689 int SSL_set_fd(SSL *s,int fd)
 690         {
 691         int ret=0;
 692         BIO *bio=NULL;
 693
 694         bio=BIO_new(BIO_s_socket());
 695
 696         if (bio == NULL)
 697                 {
 698                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 699                 goto err;
 700                 }
 701         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 702         SSL_set_bio(s,bio,bio);
 703         ret=1;
 704 err:
 705         return(ret);
 706         }
 707
 708 int SSL_set_wfd(SSL *s,int fd)
 709         {
 710         int ret=0;
 711         BIO *bio=NULL;
 712
 713         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 714                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 715                 {
 716                 bio=BIO_new(BIO_s_socket());
 717
 718                 if (bio == NULL)
 719                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 720                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 721                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 722                 }
 723         else
 724                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 725         ret=1;
 726 err:
 727         return(ret);
 728         }
 729
 730 int SSL_set_rfd(SSL *s,int fd)
 731         {
 732         int ret=0;
 733         BIO *bio=NULL;
 734
 735         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 736                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 737                 {
 738                 bio=BIO_new(BIO_s_socket());
 739
 740                 if (bio == NULL)
 741                         {
 742                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 743                         goto err;
 744                         }
 745                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 746                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 747                 }
 748         else
 749                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 750         ret=1;
 751 err:
 752         return(ret);
 753         }
 754 #endif
 755
 756
 757 /* return length of latest Finished message we sent, copy to 'buf' */
 758 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 759         {
 760         size_t ret = 0;
 761
 762         if (s->s3 != NULL)
 763                 {
 764                 ret = s->s3->tmp.finish_md_len;
 765                 if (count > ret)
 766                         count = ret;
 767                 memcpy(buf, s->s3->tmp.finish_md, count);
 768                 }
 769         return ret;
 770         }
 771
 772 /* return length of latest Finished message we expected, copy to 'buf' */
 773 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 774         {
 775         size_t ret = 0;
 776
 777         if (s->s3 != NULL)
 778                 {
 779                 ret = s->s3->tmp.peer_finish_md_len;
 780                 if (count > ret)
 781                         count = ret;
 782                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 783                 }
 784         return ret;
 785         }
 786
 787
 788 int SSL_get_verify_mode(const SSL *s)
 789         {
 790         return(s->verify_mode);
 791         }
 792
 793 int SSL_get_verify_depth(const SSL *s)
 794         {
 795         return X509_VERIFY_PARAM_get_depth(s->param);
 796         }
 797
 798 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 799         {
 800         return(s->verify_callback);
 801         }
 802
 803 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 804         {
 805         return(ctx->verify_mode);
 806         }
 807
 808 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 809         {
 810         return X509_VERIFY_PARAM_get_depth(ctx->param);
 811         }
 812
 813 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 814         {
 815         return(ctx->default_verify_callback);
 816         }
 817
 818 void SSL_set_verify(SSL *s,int mode,
 819                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 820         {
 821         s->verify_mode=mode;
 822         if (callback != NULL)
 823                 s->verify_callback=callback;
 824         }
 825
 826 void SSL_set_verify_depth(SSL *s,int depth)
 827         {
 828         X509_VERIFY_PARAM_set_depth(s->param, depth);
 829         }
 830
 831 void SSL_set_read_ahead(SSL *s,int yes)
 832         {
 833         s->read_ahead=yes;
 834         }
 835
 836 int SSL_get_read_ahead(const SSL *s)
 837         {
 838         return(s->read_ahead);
 839         }
 840
 841 int SSL_pending(const SSL *s)
 842         {
 843         /* SSL_pending cannot work properly if read-ahead is enabled
 844          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 845          * and it is impossible to fix since SSL_pending cannot report
 846          * errors that may be observed while scanning the new data.
 847          * (Note that SSL_pending() is often used as a boolean value,
 848          * so we'd better not return -1.)
 849          */
 850         return(s->method->ssl_pending(s));
 851         }
 852
 853 X509 *SSL_get_peer_certificate(const SSL *s)
 854         {
 855         X509 *r;
 856
 857         if ((s == NULL) || (s->session == NULL))
 858                 r=NULL;
 859         else
 860                 r=s->session->peer;
 861
 862         if (r == NULL) return(r);
 863
 864         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 865
 866         return(r);
 867         }
 868
 869 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 870         {
 871         STACK_OF(X509) *r;
 872
 873         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 874                 r=NULL;
 875         else
 876                 r=s->session->sess_cert->cert_chain;
 877
 878         /* If we are a client, cert_chain includes the peer's own
 879          * certificate; if we are a server, it does not. */
 880
 881         return(r);
 882         }
 883
 884 /* Now in theory, since the calling process own 't' it should be safe to
 885  * modify.  We need to be able to read f without being hassled */
 886 void SSL_copy_session_id(SSL *t,const SSL *f)
 887         {
 888         CERT *tmp;
 889
 890         /* Do we need to to SSL locking? */
 891         SSL_set_session(t,SSL_get_session(f));
 892
 893         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 894          * vice-versa */
 895         if (t->method != f->method)
 896                 {
 897                 t->method->ssl_free(t); /* cleanup current */
 898                 t->method=f->method;    /* change method */
 899                 t->method->ssl_new(t);  /* setup new */
 900                 }
 901
 902         tmp=t->cert;
 903         if (f->cert != NULL)
 904                 {
 905                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 906                 t->cert=f->cert;
 907                 }
 908         else
 909                 t->cert=NULL;
 910         if (tmp != NULL) ssl_cert_free(tmp);
 911         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 912         }
 913
 914 /* Fix this so it checks all the valid key/cert options */
 915 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 916         {
 917         if (    (ctx == NULL) ||
 918                 (ctx->cert == NULL) ||
 919                 (ctx->cert->key->x509 == NULL))
 920                 {
 921                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 922                 return(0);
 923                 }
 924         if      (ctx->cert->key->privatekey == NULL)
 925                 {
 926                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 927                 return(0);
 928                 }
 929         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 930         }
 931
 932 /* Fix this function so that it takes an optional type parameter */
 933 int SSL_check_private_key(const SSL *ssl)
 934         {
 935         if (ssl == NULL)
 936                 {
 937                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 938                 return(0);
 939                 }
 940         if (ssl->cert == NULL)
 941                 {
 942                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 943                 return 0;
 944                 }
 945         if (ssl->cert->key->x509 == NULL)
 946                 {
 947                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 948                 return(0);
 949                 }
 950         if (ssl->cert->key->privatekey == NULL)
 951                 {
 952                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 953                 return(0);
 954                 }
 955         return(X509_check_private_key(ssl->cert->key->x509,
 956                 ssl->cert->key->privatekey));
 957         }
 958
 959 int SSL_accept(SSL *s)
 960         {
 961         if (s->handshake_func == 0)
 962                 /* Not properly initialized yet */
 963                 SSL_set_accept_state(s);
 964
 965         return(s->method->ssl_accept(s));
 966         }
 967
 968 int SSL_connect(SSL *s)
 969         {
 970         if (s->handshake_func == 0)
 971                 /* Not properly initialized yet */
 972                 SSL_set_connect_state(s);
 973
 974         return(s->method->ssl_connect(s));
 975         }
 976
 977 long SSL_get_default_timeout(const SSL *s)
 978         {
 979         return(s->method->get_timeout());
 980         }
 981
 982 int SSL_read(SSL *s,void *buf,int num)
 983         {
 984         if (s->handshake_func == 0)
 985                 {
 986                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 987                 return -1;
 988                 }
 989
 990         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 991                 {
 992                 s->rwstate=SSL_NOTHING;
 993                 return(0);
 994                 }
 995         return(s->method->ssl_read(s,buf,num));
 996         }
 997
 998 int SSL_peek(SSL *s,void *buf,int num)
 999         {
1000         if (s->handshake_func == 0)
1001                 {
1002                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1003                 return -1;
1004                 }
1005
1006         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1007                 {
1008                 return(0);
1009                 }
1010         return(s->method->ssl_peek(s,buf,num));
1011         }
1012
1013 int SSL_write(SSL *s,const void *buf,int num)
1014         {
1015         if (s->handshake_func == 0)
1016                 {
1017                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1018                 return -1;
1019                 }
1020
1021         if (s->shutdown & SSL_SENT_SHUTDOWN)
1022                 {
1023                 s->rwstate=SSL_NOTHING;
1024                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1025                 return(-1);
1026                 }
1027         return(s->method->ssl_write(s,buf,num));
1028         }
1029
1030 int SSL_shutdown(SSL *s)
1031         {
1032         /* Note that this function behaves differently from what one might
1033          * expect.  Return values are 0 for no success (yet),
1034          * 1 for success; but calling it once is usually not enough,
1035          * even if blocking I/O is used (see ssl3_shutdown).
1036          */
1037
1038         if (s->handshake_func == 0)
1039                 {
1040                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1041                 return -1;
1042                 }
1043
1044         if ((s != NULL) && !SSL_in_init(s))
1045                 return(s->method->ssl_shutdown(s));
1046         else
1047                 return(1);
1048         }
1049
1050 int SSL_renegotiate(SSL *s)
1051         {
1052         if (s->renegotiate == 0)
1053                 s->renegotiate=1;
1054
1055         s->new_session=1;
1056
1057         return(s->method->ssl_renegotiate(s));
1058         }
1059
1060 int SSL_renegotiate_abbreviated(SSL *s)
1061         {
1062         if (s->renegotiate == 0)
1063                 s->renegotiate=1;
1064
1065         s->new_session=0;
1066
1067         return(s->method->ssl_renegotiate(s));
1068         }
1069
1070 int SSL_renegotiate_pending(SSL *s)
1071         {
1072         /* becomes true when negotiation is requested;
1073          * false again once a handshake has finished */
1074         return (s->renegotiate != 0);
1075         }
1076
1077 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1078         {
1079         long l;
1080
1081         switch (cmd)
1082                 {
1083         case SSL_CTRL_GET_READ_AHEAD:
1084                 return(s->read_ahead);
1085         case SSL_CTRL_SET_READ_AHEAD:
1086                 l=s->read_ahead;
1087                 s->read_ahead=larg;
1088                 return(l);
1089
1090         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1091                 s->msg_callback_arg = parg;
1092                 return 1;
1093
1094         case SSL_CTRL_OPTIONS:
1095                 return(s->options|=larg);
1096         case SSL_CTRL_CLEAR_OPTIONS:
1097                 return(s->options&=~larg);
1098         case SSL_CTRL_MODE:
1099                 return(s->mode|=larg);
1100         case SSL_CTRL_CLEAR_MODE:
1101                 return(s->mode &=~larg);
1102         case SSL_CTRL_GET_MAX_CERT_LIST:
1103                 return(s->max_cert_list);
1104         case SSL_CTRL_SET_MAX_CERT_LIST:
1105                 l=s->max_cert_list;
1106                 s->max_cert_list=larg;
1107                 return(l);
1108         case SSL_CTRL_SET_MTU:
1109 #ifndef OPENSSL_NO_DTLS1
1110                 if (larg < (long)dtls1_min_mtu())
1111                         return 0;
1112 #endif
1113
1114                 if (SSL_version(s) == DTLS1_VERSION ||
1115                     SSL_version(s) == DTLS1_BAD_VER)
1116                         {
1117                         s->d1->mtu = larg;
1118                         return larg;
1119                         }
1120                 return 0;
1121         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1122                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1123                         return 0;
1124                 s->max_send_fragment = larg;
1125                 return 1;
1126         case SSL_CTRL_GET_RI_SUPPORT:
1127                 if (s->s3)
1128                         return s->s3->send_connection_binding;
1129                 else return 0;
1130         case SSL_CTRL_CERT_FLAGS:
1131                 return(s->cert->cert_flags|=larg);
1132         case SSL_CTRL_CLEAR_CERT_FLAGS:
1133                 return(s->cert->cert_flags &=~larg);
1134         default:
1135                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1136                 }
1137         }
1138
1139 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1140         {
1141         switch(cmd)
1142                 {
1143         case SSL_CTRL_SET_MSG_CALLBACK:
1144                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1145                 return 1;
1146
1147         default:
1148                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1149                 }
1150         }
1151
1152 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1153         {
1154         return ctx->sessions;
1155         }
1156
1157 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1158         {
1159         long l;
1160
1161         switch (cmd)
1162                 {
1163         case SSL_CTRL_GET_READ_AHEAD:
1164                 return(ctx->read_ahead);
1165         case SSL_CTRL_SET_READ_AHEAD:
1166                 l=ctx->read_ahead;
1167                 ctx->read_ahead=larg;
1168                 return(l);
1169
1170         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1171                 ctx->msg_callback_arg = parg;
1172                 return 1;
1173
1174         case SSL_CTRL_GET_MAX_CERT_LIST:
1175                 return(ctx->max_cert_list);
1176         case SSL_CTRL_SET_MAX_CERT_LIST:
1177                 l=ctx->max_cert_list;
1178                 ctx->max_cert_list=larg;
1179                 return(l);
1180
1181         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1182                 l=ctx->session_cache_size;
1183                 ctx->session_cache_size=larg;
1184                 return(l);
1185         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1186                 return(ctx->session_cache_size);
1187         case SSL_CTRL_SET_SESS_CACHE_MODE:
1188                 l=ctx->session_cache_mode;
1189                 ctx->session_cache_mode=larg;
1190                 return(l);
1191         case SSL_CTRL_GET_SESS_CACHE_MODE:
1192                 return(ctx->session_cache_mode);
1193
1194         case SSL_CTRL_SESS_NUMBER:
1195                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1196         case SSL_CTRL_SESS_CONNECT:
1197                 return(ctx->stats.sess_connect);
1198         case SSL_CTRL_SESS_CONNECT_GOOD:
1199                 return(ctx->stats.sess_connect_good);
1200         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1201                 return(ctx->stats.sess_connect_renegotiate);
1202         case SSL_CTRL_SESS_ACCEPT:
1203                 return(ctx->stats.sess_accept);
1204         case SSL_CTRL_SESS_ACCEPT_GOOD:
1205                 return(ctx->stats.sess_accept_good);
1206         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1207                 return(ctx->stats.sess_accept_renegotiate);
1208         case SSL_CTRL_SESS_HIT:
1209                 return(ctx->stats.sess_hit);
1210         case SSL_CTRL_SESS_CB_HIT:
1211                 return(ctx->stats.sess_cb_hit);
1212         case SSL_CTRL_SESS_MISSES:
1213                 return(ctx->stats.sess_miss);
1214         case SSL_CTRL_SESS_TIMEOUTS:
1215                 return(ctx->stats.sess_timeout);
1216         case SSL_CTRL_SESS_CACHE_FULL:
1217                 return(ctx->stats.sess_cache_full);
1218         case SSL_CTRL_OPTIONS:
1219                 return(ctx->options|=larg);
1220         case SSL_CTRL_CLEAR_OPTIONS:
1221                 return(ctx->options&=~larg);
1222         case SSL_CTRL_MODE:
1223                 return(ctx->mode|=larg);
1224         case SSL_CTRL_CLEAR_MODE:
1225                 return(ctx->mode&=~larg);
1226         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1227                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1228                         return 0;
1229                 ctx->max_send_fragment = larg;
1230                 return 1;
1231         case SSL_CTRL_CERT_FLAGS:
1232                 return(ctx->cert->cert_flags|=larg);
1233         case SSL_CTRL_CLEAR_CERT_FLAGS:
1234                 return(ctx->cert->cert_flags &=~larg);
1235         default:
1236                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1237                 }
1238         }
1239
1240 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1241         {
1242         switch(cmd)
1243                 {
1244         case SSL_CTRL_SET_MSG_CALLBACK:
1245                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1246                 return 1;
1247
1248         default:
1249                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1250                 }
1251         }
1252
1253 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1254         {
1255         long l;
1256
1257         l=a->id-b->id;
1258         if (l == 0L)
1259                 return(0);
1260         else
1261                 return((l > 0)?1:-1);
1262         }
1263
1264 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1265                         const SSL_CIPHER * const *bp)
1266         {
1267         long l;
1268
1269         l=(*ap)->id-(*bp)->id;
1270         if (l == 0L)
1271                 return(0);
1272         else
1273                 return((l > 0)?1:-1);
1274         }
1275
1276 /** return a STACK of the ciphers available for the SSL and in order of
1277  * preference */
1278 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1279         {
1280         if (s != NULL)
1281                 {
1282                 if (s->cipher_list != NULL)
1283                         {
1284                         return(s->cipher_list);
1285                         }
1286                 else if ((s->ctx != NULL) &&
1287                         (s->ctx->cipher_list != NULL))
1288                         {
1289                         return(s->ctx->cipher_list);
1290                         }
1291                 }
1292         return(NULL);
1293         }
1294
1295 /** return a STACK of the ciphers available for the SSL and in order of
1296  * algorithm id */
1297 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1298         {
1299         if (s != NULL)
1300                 {
1301                 if (s->cipher_list_by_id != NULL)
1302                         {
1303                         return(s->cipher_list_by_id);
1304                         }
1305                 else if ((s->ctx != NULL) &&
1306                         (s->ctx->cipher_list_by_id != NULL))
1307                         {
1308                         return(s->ctx->cipher_list_by_id);
1309                         }
1310                 }
1311         return(NULL);
1312         }
1313
1314 /** The old interface to get the same thing as SSL_get_ciphers() */
1315 const char *SSL_get_cipher_list(const SSL *s,int n)
1316         {
1317         SSL_CIPHER *c;
1318         STACK_OF(SSL_CIPHER) *sk;
1319
1320         if (s == NULL) return(NULL);
1321         sk=SSL_get_ciphers(s);
1322         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1323                 return(NULL);
1324         c=sk_SSL_CIPHER_value(sk,n);
1325         if (c == NULL) return(NULL);
1326         return(c->name);
1327         }
1328
1329 /** specify the ciphers to be used by default by the SSL_CTX */
1330 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1331         {
1332         STACK_OF(SSL_CIPHER) *sk;
1333
1334         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1335                 &ctx->cipher_list_by_id,str);
1336         /* ssl_create_cipher_list may return an empty stack if it
1337          * was unable to find a cipher matching the given rule string
1338          * (for example if the rule string specifies a cipher which
1339          * has been disabled). This is not an error as far as
1340          * ssl_create_cipher_list is concerned, and hence
1341          * ctx->cipher_list and ctx->cipher_list_by_id has been
1342          * updated. */
1343         if (sk == NULL)
1344                 return 0;
1345         else if (sk_SSL_CIPHER_num(sk) == 0)
1346                 {
1347                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1348                 return 0;
1349                 }
1350         return 1;
1351         }
1352
1353 /** specify the ciphers to be used by the SSL */
1354 int SSL_set_cipher_list(SSL *s,const char *str)
1355         {
1356         STACK_OF(SSL_CIPHER) *sk;
1357
1358         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1359                 &s->cipher_list_by_id,str);
1360         /* see comment in SSL_CTX_set_cipher_list */
1361         if (sk == NULL)
1362                 return 0;
1363         else if (sk_SSL_CIPHER_num(sk) == 0)
1364                 {
1365                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1366                 return 0;
1367                 }
1368         return 1;
1369         }
1370
1371 /* works well for SSLv2, not so good for SSLv3 */
1372 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1373         {
1374         char *p;
1375         STACK_OF(SSL_CIPHER) *sk;
1376         SSL_CIPHER *c;
1377         int i;
1378
1379         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1380                 (len < 2))
1381                 return(NULL);
1382
1383         p=buf;
1384         sk=s->session->ciphers;
1385         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1386                 {
1387                 int n;
1388
1389                 c=sk_SSL_CIPHER_value(sk,i);
1390                 n=strlen(c->name);
1391                 if (n+1 > len)
1392                         {
1393                         if (p != buf)
1394                                 --p;
1395                         *p='\0';
1396                         return buf;
1397                         }
1398                 strcpy(p,c->name);
1399                 p+=n;
1400                 *(p++)=':';
1401                 len-=n+1;
1402                 }
1403         p[-1]='\0';
1404         return(buf);
1405         }
1406
1407 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1408                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1409         {
1410         int i,j=0;
1411         SSL_CIPHER *c;
1412         CERT *ct = s->cert;
1413         unsigned char *q;
1414         /* Set disabled masks for this session */
1415         ssl_set_client_disabled(s);
1416
1417         if (sk == NULL) return(0);
1418         q=p;
1419
1420         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1421                 {
1422                 c=sk_SSL_CIPHER_value(sk,i);
1423                 /* Skip disabled ciphers */
1424                 if (c->algorithm_ssl & ct->mask_ssl ||
1425                         c->algorithm_mkey & ct->mask_k ||
1426                         c->algorithm_auth & ct->mask_a)
1427                         continue;
1428                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1429                 p+=j;
1430                 }
1431         /* If p == q, no ciphers and caller indicates an error. Otherwise
1432          * add SCSV if not renegotiating.
1433          */
1434         if (p != q && !s->renegotiate)
1435                 {
1436                 static SSL_CIPHER scsv =
1437                         {
1438                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1439                         };
1440                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1441                 p+=j;
1442 #ifdef OPENSSL_RI_DEBUG
1443                 fprintf(stderr, "SCSV sent by client\n");
1444 #endif
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         if (s->s3)
1457                 s->s3->send_connection_binding = 0;
1458
1459         n=ssl_put_cipher_by_char(s,NULL,NULL);
1460         if ((num%n) != 0)
1461                 {
1462                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1463                 return(NULL);
1464                 }
1465         if ((skp == NULL) || (*skp == NULL))
1466                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1467         else
1468                 {
1469                 sk= *skp;
1470                 sk_SSL_CIPHER_zero(sk);
1471                 }
1472
1473         for (i=0; i<num; i+=n)
1474                 {
1475                 /* Check for SCSV */
1476                 if (s->s3 && (n != 3 || !p[0]) &&
1477                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1478                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1479                         {
1480                         /* SCSV fatal if renegotiating */
1481                         if (s->renegotiate)
1482                                 {
1483                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1484                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1485                                 goto err;
1486                                 }
1487                         s->s3->send_connection_binding = 1;
1488                         p += n;
1489 #ifdef OPENSSL_RI_DEBUG
1490                         fprintf(stderr, "SCSV received by server\n");
1491 #endif
1492                         continue;
1493                         }
1494
1495                 c=ssl_get_cipher_by_char(s,p);
1496                 p+=n;
1497                 if (c != NULL)
1498                         {
1499                         if (!sk_SSL_CIPHER_push(sk,c))
1500                                 {
1501                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1502                                 goto err;
1503                                 }
1504                         }
1505                 }
1506
1507         if (skp != NULL)
1508                 *skp=sk;
1509         return(sk);
1510 err:
1511         if ((skp == NULL) || (*skp == NULL))
1512                 sk_SSL_CIPHER_free(sk);
1513         return(NULL);
1514         }
1515
1516
1517 #ifndef OPENSSL_NO_TLSEXT
1518 /** return a servername extension value if provided in Client Hello, or NULL.
1519  * So far, only host_name types are defined (RFC 3546).
1520  */
1521
1522 const char *SSL_get_servername(const SSL *s, const int type)
1523         {
1524         if (type != TLSEXT_NAMETYPE_host_name)
1525                 return NULL;
1526
1527         return s->session && !s->tlsext_hostname ?
1528                 s->session->tlsext_hostname :
1529                 s->tlsext_hostname;
1530         }
1531
1532 int SSL_get_servername_type(const SSL *s)
1533         {
1534         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1535                 return TLSEXT_NAMETYPE_host_name;
1536         return -1;
1537         }
1538
1539 # ifndef OPENSSL_NO_NEXTPROTONEG
1540 /* SSL_select_next_proto implements the standard protocol selection. It is
1541  * expected that this function is called from the callback set by
1542  * SSL_CTX_set_next_proto_select_cb.
1543  *
1544  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1545  * strings. The length byte itself is not included in the length. A byte
1546  * string of length 0 is invalid. No byte string may be truncated.
1547  *
1548  * The current, but experimental algorithm for selecting the protocol is:
1549  *
1550  * 1) If the server doesn't support NPN then this is indicated to the
1551  * callback. In this case, the client application has to abort the connection
1552  * or have a default application level protocol.
1553  *
1554  * 2) If the server supports NPN, but advertises an empty list then the
1555  * client selects the first protcol in its list, but indicates via the
1556  * API that this fallback case was enacted.
1557  *
1558  * 3) Otherwise, the client finds the first protocol in the server's list
1559  * that it supports and selects this protocol. This is because it's
1560  * assumed that the server has better information about which protocol
1561  * a client should use.
1562  *
1563  * 4) If the client doesn't support any of the server's advertised
1564  * protocols, then this is treated the same as case 2.
1565  *
1566  * It returns either
1567  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1568  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1569  */
1570 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)
1571         {
1572         unsigned int i, j;
1573         const unsigned char *result;
1574         int status = OPENSSL_NPN_UNSUPPORTED;
1575
1576         /* For each protocol in server preference order, see if we support it. */
1577         for (i = 0; i < server_len; )
1578                 {
1579                 for (j = 0; j < client_len; )
1580                         {
1581                         if (server[i] == client[j] &&
1582                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1583                                 {
1584                                 /* We found a match */
1585                                 result = &server[i];
1586                                 status = OPENSSL_NPN_NEGOTIATED;
1587                                 goto found;
1588                                 }
1589                         j += client[j];
1590                         j++;
1591                         }
1592                 i += server[i];
1593                 i++;
1594                 }
1595
1596         /* There's no overlap between our protocols and the server's list. */
1597         result = client;
1598         status = OPENSSL_NPN_NO_OVERLAP;
1599
1600         found:
1601         *out = (unsigned char *) result + 1;
1602         *outlen = result[0];
1603         return status;
1604         }
1605
1606 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1607  * requested protocol for this connection and returns 0. If the client didn't
1608  * request any protocol, then *data is set to NULL.
1609  *
1610  * Note that the client can request any protocol it chooses. The value returned
1611  * from this function need not be a member of the list of supported protocols
1612  * provided by the callback.
1613  */
1614 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1615         {
1616         *data = s->next_proto_negotiated;
1617         if (!*data) {
1618                 *len = 0;
1619         } else {
1620                 *len = s->next_proto_negotiated_len;
1621         }
1622 }
1623
1624 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1625  * TLS server needs a list of supported protocols for Next Protocol
1626  * Negotiation. The returned list must be in wire format.  The list is returned
1627  * by setting |out| to point to it and |outlen| to its length. This memory will
1628  * not be modified, but one should assume that the SSL* keeps a reference to
1629  * it.
1630  *
1631  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1632  * such extension will be included in the ServerHello. */
1633 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)
1634         {
1635         ctx->next_protos_advertised_cb = cb;
1636         ctx->next_protos_advertised_cb_arg = arg;
1637         }
1638
1639 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1640  * client needs to select a protocol from the server's provided list. |out|
1641  * must be set to point to the selected protocol (which may be within |in|).
1642  * The length of the protocol name must be written into |outlen|. The server's
1643  * advertised protocols are provided in |in| and |inlen|. The callback can
1644  * assume that |in| is syntactically valid.
1645  *
1646  * The client must select a protocol. It is fatal to the connection if this
1647  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1648  */
1649 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)
1650         {
1651         ctx->next_proto_select_cb = cb;
1652         ctx->next_proto_select_cb_arg = arg;
1653         }
1654 # endif
1655 #endif
1656
1657 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1658         const char *label, size_t llen, const unsigned char *p, size_t plen,
1659         int use_context)
1660         {
1661         if (s->version < TLS1_VERSION)
1662                 return -1;
1663
1664         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1665                                                            llen, p, plen,
1666                                                            use_context);
1667         }
1668
1669 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1670         {
1671         unsigned long l;
1672
1673         l=(unsigned long)
1674                 ((unsigned int) a->session_id[0]     )|
1675                 ((unsigned int) a->session_id[1]<< 8L)|
1676                 ((unsigned long)a->session_id[2]<<16L)|
1677                 ((unsigned long)a->session_id[3]<<24L);
1678         return(l);
1679         }
1680
1681 /* NB: If this function (or indeed the hash function which uses a sort of
1682  * coarser function than this one) is changed, ensure
1683  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1684  * able to construct an SSL_SESSION that will collide with any existing session
1685  * with a matching session ID. */
1686 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1687         {
1688         if (a->ssl_version != b->ssl_version)
1689                 return(1);
1690         if (a->session_id_length != b->session_id_length)
1691                 return(1);
1692         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1693         }
1694
1695 /* These wrapper functions should remain rather than redeclaring
1696  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1697  * variable. The reason is that the functions aren't static, they're exposed via
1698  * ssl.h. */
1699 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1700 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1701
1702 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1703         {
1704         SSL_CTX *ret=NULL;
1705
1706         if (meth == NULL)
1707                 {
1708                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1709                 return(NULL);
1710                 }
1711
1712 #ifdef OPENSSL_FIPS
1713         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1714                 {
1715                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1716                 return NULL;
1717                 }
1718 #endif
1719
1720         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1721                 {
1722                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1723                 goto err;
1724                 }
1725         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1726         if (ret == NULL)
1727                 goto err;
1728
1729         memset(ret,0,sizeof(SSL_CTX));
1730
1731         ret->method=meth;
1732
1733         ret->cert_store=NULL;
1734         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1735         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1736         ret->session_cache_head=NULL;
1737         ret->session_cache_tail=NULL;
1738
1739         /* We take the system default */
1740         ret->session_timeout=meth->get_timeout();
1741
1742         ret->new_session_cb=0;
1743         ret->remove_session_cb=0;
1744         ret->get_session_cb=0;
1745         ret->generate_session_id=0;
1746
1747         memset((char *)&ret->stats,0,sizeof(ret->stats));
1748
1749         ret->references=1;
1750         ret->quiet_shutdown=0;
1751
1752 /*      ret->cipher=NULL;*/
1753 /*      ret->s2->challenge=NULL;
1754         ret->master_key=NULL;
1755         ret->key_arg=NULL;
1756         ret->s2->conn_id=NULL; */
1757
1758         ret->info_callback=NULL;
1759
1760         ret->app_verify_callback=0;
1761         ret->app_verify_arg=NULL;
1762
1763         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1764         ret->read_ahead=0;
1765         ret->msg_callback=0;
1766         ret->msg_callback_arg=NULL;
1767         ret->verify_mode=SSL_VERIFY_NONE;
1768 #if 0
1769         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1770 #endif
1771         ret->sid_ctx_length=0;
1772         ret->default_verify_callback=NULL;
1773         if ((ret->cert=ssl_cert_new()) == NULL)
1774                 goto err;
1775
1776         ret->default_passwd_callback=0;
1777         ret->default_passwd_callback_userdata=NULL;
1778         ret->client_cert_cb=0;
1779         ret->app_gen_cookie_cb=0;
1780         ret->app_verify_cookie_cb=0;
1781
1782         ret->sessions=lh_SSL_SESSION_new();
1783         if (ret->sessions == NULL) goto err;
1784         ret->cert_store=X509_STORE_new();
1785         if (ret->cert_store == NULL) goto err;
1786
1787         ssl_create_cipher_list(ret->method,
1788                 &ret->cipher_list,&ret->cipher_list_by_id,
1789                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1790         if (ret->cipher_list == NULL
1791             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1792                 {
1793                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1794                 goto err2;
1795                 }
1796
1797         ret->param = X509_VERIFY_PARAM_new();
1798         if (!ret->param)
1799                 goto err;
1800
1801         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1802                 {
1803                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1804                 goto err2;
1805                 }
1806         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1807                 {
1808                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1809                 goto err2;
1810                 }
1811         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1812                 {
1813                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1814                 goto err2;
1815                 }
1816
1817         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1818                 goto err;
1819
1820         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1821
1822         ret->extra_certs=NULL;
1823         ret->comp_methods=SSL_COMP_get_compression_methods();
1824
1825         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1826
1827 #ifndef OPENSSL_NO_TLSEXT
1828         ret->tlsext_servername_callback = 0;
1829         ret->tlsext_servername_arg = NULL;
1830         /* Setup RFC4507 ticket keys */
1831         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1832                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1833                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1834                 ret->options |= SSL_OP_NO_TICKET;
1835
1836         ret->tlsext_status_cb = 0;
1837         ret->tlsext_status_arg = NULL;
1838
1839 # ifndef OPENSSL_NO_NEXTPROTONEG
1840         ret->next_protos_advertised_cb = 0;
1841         ret->next_proto_select_cb = 0;
1842 # endif
1843 #endif
1844 #ifndef OPENSSL_NO_PSK
1845         ret->psk_identity_hint=NULL;
1846         ret->psk_client_callback=NULL;
1847         ret->psk_server_callback=NULL;
1848 #endif
1849 #ifndef OPENSSL_NO_SRP
1850         SSL_CTX_SRP_CTX_init(ret);
1851 #endif
1852 #ifndef OPENSSL_NO_BUF_FREELISTS
1853         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1854         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1855         if (!ret->rbuf_freelist)
1856                 goto err;
1857         ret->rbuf_freelist->chunklen = 0;
1858         ret->rbuf_freelist->len = 0;
1859         ret->rbuf_freelist->head = NULL;
1860         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1861         if (!ret->wbuf_freelist)
1862                 {
1863                 OPENSSL_free(ret->rbuf_freelist);
1864                 goto err;
1865                 }
1866         ret->wbuf_freelist->chunklen = 0;
1867         ret->wbuf_freelist->len = 0;
1868         ret->wbuf_freelist->head = NULL;
1869 #endif
1870 #ifndef OPENSSL_NO_ENGINE
1871         ret->client_cert_engine = NULL;
1872 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1873 #define eng_strx(x)     #x
1874 #define eng_str(x)      eng_strx(x)
1875         /* Use specific client engine automatically... ignore errors */
1876         {
1877         ENGINE *eng;
1878         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1879         if (!eng)
1880                 {
1881                 ERR_clear_error();
1882                 ENGINE_load_builtin_engines();
1883                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1884                 }
1885         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1886                 ERR_clear_error();
1887         }
1888 #endif
1889 #endif
1890         /* Default is to connect to non-RI servers. When RI is more widely
1891          * deployed might change this.
1892          */
1893         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1894
1895         return(ret);
1896 err:
1897         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1898 err2:
1899         if (ret != NULL) SSL_CTX_free(ret);
1900         return(NULL);
1901         }
1902
1903 #if 0
1904 static void SSL_COMP_free(SSL_COMP *comp)
1905     { OPENSSL_free(comp); }
1906 #endif
1907
1908 #ifndef OPENSSL_NO_BUF_FREELISTS
1909 static void
1910 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1911         {
1912         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1913         for (ent = list->head; ent; ent = next)
1914                 {
1915                 next = ent->next;
1916                 OPENSSL_free(ent);
1917                 }
1918         OPENSSL_free(list);
1919         }
1920 #endif
1921
1922 void SSL_CTX_free(SSL_CTX *a)
1923         {
1924         int i;
1925
1926         if (a == NULL) return;
1927
1928         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1929 #ifdef REF_PRINT
1930         REF_PRINT("SSL_CTX",a);
1931 #endif
1932         if (i > 0) return;
1933 #ifdef REF_CHECK
1934         if (i < 0)
1935                 {
1936                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1937                 abort(); /* ok */
1938                 }
1939 #endif
1940
1941         if (a->param)
1942                 X509_VERIFY_PARAM_free(a->param);
1943
1944         /*
1945          * Free internal session cache. However: the remove_cb() may reference
1946          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1947          * after the sessions were flushed.
1948          * As the ex_data handling routines might also touch the session cache,
1949          * the most secure solution seems to be: empty (flush) the cache, then
1950          * free ex_data, then finally free the cache.
1951          * (See ticket [openssl.org #212].)
1952          */
1953         if (a->sessions != NULL)
1954                 SSL_CTX_flush_sessions(a,0);
1955
1956         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1957
1958         if (a->sessions != NULL)
1959                 lh_SSL_SESSION_free(a->sessions);
1960
1961         if (a->cert_store != NULL)
1962                 X509_STORE_free(a->cert_store);
1963         if (a->cipher_list != NULL)
1964                 sk_SSL_CIPHER_free(a->cipher_list);
1965         if (a->cipher_list_by_id != NULL)
1966                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1967         if (a->cert != NULL)
1968                 ssl_cert_free(a->cert);
1969         if (a->client_CA != NULL)
1970                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1971         if (a->extra_certs != NULL)
1972                 sk_X509_pop_free(a->extra_certs,X509_free);
1973 #if 0 /* This should never be done, since it removes a global database */
1974         if (a->comp_methods != NULL)
1975                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1976 #else
1977         a->comp_methods = NULL;
1978 #endif
1979
1980         if (a->srtp_profiles)
1981                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1982
1983 #ifndef OPENSSL_NO_PSK
1984         if (a->psk_identity_hint)
1985                 OPENSSL_free(a->psk_identity_hint);
1986 #endif
1987 #ifndef OPENSSL_NO_SRP
1988         SSL_CTX_SRP_CTX_free(a);
1989 #endif
1990 #ifndef OPENSSL_NO_ENGINE
1991         if (a->client_cert_engine)
1992                 ENGINE_finish(a->client_cert_engine);
1993 #endif
1994
1995 #ifndef OPENSSL_NO_BUF_FREELISTS
1996         if (a->wbuf_freelist)
1997                 ssl_buf_freelist_free(a->wbuf_freelist);
1998         if (a->rbuf_freelist)
1999                 ssl_buf_freelist_free(a->rbuf_freelist);
2000 #endif
2001 #ifndef OPENSSL_NO_TLSEXT
2002 # ifndef OPENSSL_NO_EC
2003         if (a->tlsext_ecpointformatlist)
2004                 OPENSSL_free(a->tlsext_ecpointformatlist);
2005         if (a->tlsext_ellipticcurvelist)
2006                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2007 # endif /* OPENSSL_NO_EC */
2008 #endif
2009
2010         OPENSSL_free(a);
2011         }
2012
2013 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2014         {
2015         ctx->default_passwd_callback=cb;
2016         }
2017
2018 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2019         {
2020         ctx->default_passwd_callback_userdata=u;
2021         }
2022
2023 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2024         {
2025         ctx->app_verify_callback=cb;
2026         ctx->app_verify_arg=arg;
2027         }
2028
2029 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2030         {
2031         ctx->verify_mode=mode;
2032         ctx->default_verify_callback=cb;
2033         }
2034
2035 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2036         {
2037         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2038         }
2039
2040 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2041         {
2042         ssl_cert_set_cert_cb(c->cert, cb, arg);
2043         }
2044
2045 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2046         {
2047         ssl_cert_set_cert_cb(s->cert, cb, arg);
2048         }
2049
2050 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2051         {
2052         CERT_PKEY *cpk;
2053         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2054         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2055         int rsa_tmp_export,dh_tmp_export,kl;
2056         unsigned long mask_k,mask_a,emask_k,emask_a;
2057         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2058 #ifndef OPENSSL_NO_ECDH
2059         int have_ecdh_tmp;
2060 #endif
2061         X509 *x = NULL;
2062         EVP_PKEY *ecc_pkey = NULL;
2063         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2064
2065         if (c == NULL) return;
2066
2067         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2068
2069 #ifndef OPENSSL_NO_RSA
2070         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2071         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2072                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2073 #else
2074         rsa_tmp=rsa_tmp_export=0;
2075 #endif
2076 #ifndef OPENSSL_NO_DH
2077         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2078         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2079                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2080 #else
2081         dh_tmp=dh_tmp_export=0;
2082 #endif
2083
2084 #ifndef OPENSSL_NO_ECDH
2085         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2086 #endif
2087         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2088         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2089         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2090         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2091         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2092         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2093         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2094         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2095         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2096         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2097         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2098 /* FIX THIS EAY EAY EAY */
2099         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2100         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2101         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2102         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2103         mask_k=0;
2104         mask_a=0;
2105         emask_k=0;
2106         emask_a=0;
2107
2108
2109
2110 #ifdef CIPHER_DEBUG
2111         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2112                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2113                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2114 #endif
2115
2116         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2117         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2118                 mask_k |= SSL_kGOST;
2119                 mask_a |= SSL_aGOST01;
2120         }
2121         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2122         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2123                 mask_k |= SSL_kGOST;
2124                 mask_a |= SSL_aGOST94;
2125         }
2126
2127         if (rsa_enc || (rsa_tmp && rsa_sign))
2128                 mask_k|=SSL_kRSA;
2129         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2130                 emask_k|=SSL_kRSA;
2131
2132 #if 0
2133         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2134         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2135                 (rsa_enc || rsa_sign || dsa_sign))
2136                 mask_k|=SSL_kEDH;
2137         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2138                 (rsa_enc || rsa_sign || dsa_sign))
2139                 emask_k|=SSL_kEDH;
2140 #endif
2141
2142         if (dh_tmp_export)
2143                 emask_k|=SSL_kEDH;
2144
2145         if (dh_tmp)
2146                 mask_k|=SSL_kEDH;
2147
2148         if (dh_rsa) mask_k|=SSL_kDHr;
2149         if (dh_rsa_export) emask_k|=SSL_kDHr;
2150
2151         if (dh_dsa) mask_k|=SSL_kDHd;
2152         if (dh_dsa_export) emask_k|=SSL_kDHd;
2153
2154         if (emask_k & (SSL_kDHr|SSL_kDHd))
2155                 mask_a |= SSL_aDH;
2156
2157         if (rsa_enc || rsa_sign)
2158                 {
2159                 mask_a|=SSL_aRSA;
2160                 emask_a|=SSL_aRSA;
2161                 }
2162
2163         if (dsa_sign)
2164                 {
2165                 mask_a|=SSL_aDSS;
2166                 emask_a|=SSL_aDSS;
2167                 }
2168
2169         mask_a|=SSL_aNULL;
2170         emask_a|=SSL_aNULL;
2171
2172 #ifndef OPENSSL_NO_KRB5
2173         mask_k|=SSL_kKRB5;
2174         mask_a|=SSL_aKRB5;
2175         emask_k|=SSL_kKRB5;
2176         emask_a|=SSL_aKRB5;
2177 #endif
2178
2179         /* An ECC certificate may be usable for ECDH and/or
2180          * ECDSA cipher suites depending on the key usage extension.
2181          */
2182         if (have_ecc_cert)
2183                 {
2184                 cpk = &c->pkeys[SSL_PKEY_ECC];
2185                 x = cpk->x509;
2186                 /* This call populates extension flags (ex_flags) */
2187                 X509_check_purpose(x, -1, 0);
2188                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2189                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2190                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2191                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2192                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2193                         ecdsa_ok = 0;
2194                 ecc_pkey = X509_get_pubkey(x);
2195                 ecc_pkey_size = (ecc_pkey != NULL) ?
2196                     EVP_PKEY_bits(ecc_pkey) : 0;
2197                 EVP_PKEY_free(ecc_pkey);
2198                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2199                         {
2200                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2201                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2202                         }
2203 #ifndef OPENSSL_NO_ECDH
2204                 if (ecdh_ok)
2205                         {
2206
2207                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2208                                 {
2209                                 mask_k|=SSL_kECDHr;
2210                                 mask_a|=SSL_aECDH;
2211                                 if (ecc_pkey_size <= 163)
2212                                         {
2213                                         emask_k|=SSL_kECDHr;
2214                                         emask_a|=SSL_aECDH;
2215                                         }
2216                                 }
2217
2218                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2219                                 {
2220                                 mask_k|=SSL_kECDHe;
2221                                 mask_a|=SSL_aECDH;
2222                                 if (ecc_pkey_size <= 163)
2223                                         {
2224                                         emask_k|=SSL_kECDHe;
2225                                         emask_a|=SSL_aECDH;
2226                                         }
2227                                 }
2228                         }
2229 #endif
2230 #ifndef OPENSSL_NO_ECDSA
2231                 if (ecdsa_ok)
2232                         {
2233                         mask_a|=SSL_aECDSA;
2234                         emask_a|=SSL_aECDSA;
2235                         }
2236 #endif
2237                 }
2238
2239 #ifndef OPENSSL_NO_ECDH
2240         if (have_ecdh_tmp)
2241                 {
2242                 mask_k|=SSL_kEECDH;
2243                 emask_k|=SSL_kEECDH;
2244                 }
2245 #endif
2246
2247 #ifndef OPENSSL_NO_PSK
2248         mask_k |= SSL_kPSK;
2249         mask_a |= SSL_aPSK;
2250         emask_k |= SSL_kPSK;
2251         emask_a |= SSL_aPSK;
2252 #endif
2253
2254         c->mask_k=mask_k;
2255         c->mask_a=mask_a;
2256         c->export_mask_k=emask_k;
2257         c->export_mask_a=emask_a;
2258         c->valid=1;
2259         }
2260
2261 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2262 #define ku_reject(x, usage) \
2263         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2264
2265 #ifndef OPENSSL_NO_EC
2266
2267 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2268         {
2269         unsigned long alg_k, alg_a;
2270         EVP_PKEY *pkey = NULL;
2271         int keysize = 0;
2272         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2273         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2274
2275         alg_k = cs->algorithm_mkey;
2276         alg_a = cs->algorithm_auth;
2277
2278         if (SSL_C_IS_EXPORT(cs))
2279                 {
2280                 /* ECDH key length in export ciphers must be <= 163 bits */
2281                 pkey = X509_get_pubkey(x);
2282                 if (pkey == NULL) return 0;
2283                 keysize = EVP_PKEY_bits(pkey);
2284                 EVP_PKEY_free(pkey);
2285                 if (keysize > 163) return 0;
2286                 }
2287
2288         /* This call populates the ex_flags field correctly */
2289         X509_check_purpose(x, -1, 0);
2290         if ((x->sig_alg) && (x->sig_alg->algorithm))
2291                 {
2292                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2293                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2294                 }
2295         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2296                 {
2297                 /* key usage, if present, must allow key agreement */
2298                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2299                         {
2300                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2301                         return 0;
2302                         }
2303                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2304                         {
2305                         /* signature alg must be ECDSA */
2306                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2307                                 {
2308                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2309                                 return 0;
2310                                 }
2311                         }
2312                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2313                         {
2314                         /* signature alg must be RSA */
2315
2316                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2317                                 {
2318                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2319                                 return 0;
2320                                 }
2321                         }
2322                 }
2323         if (alg_a & SSL_aECDSA)
2324                 {
2325                 /* key usage, if present, must allow signing */
2326                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2327                         {
2328                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2329                         return 0;
2330                         }
2331                 }
2332
2333         return 1;  /* all checks are ok */
2334         }
2335
2336 #endif
2337
2338 /* THIS NEEDS CLEANING UP */
2339 static int ssl_get_server_cert_index(const SSL *s)
2340         {
2341         unsigned long alg_k, alg_a;
2342
2343         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2344         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2345
2346         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2347                 {
2348                 /* we don't need to look at SSL_kEECDH
2349                  * since no certificate is needed for
2350                  * anon ECDH and for authenticated
2351                  * EECDH, the check for the auth
2352                  * algorithm will set i correctly
2353                  * NOTE: For ECDH-RSA, we need an ECC
2354                  * not an RSA cert but for EECDH-RSA
2355                  * we need an RSA cert. Placing the
2356                  * checks for SSL_kECDH before RSA
2357                  * checks ensures the correct cert is chosen.
2358                  */
2359                 return SSL_PKEY_ECC;
2360                 }
2361         else if (alg_a & SSL_aECDSA)
2362                 return SSL_PKEY_ECC;
2363         else if (alg_k & SSL_kDHr)
2364                 return SSL_PKEY_DH_RSA;
2365         else if (alg_k & SSL_kDHd)
2366                 return SSL_PKEY_DH_DSA;
2367         else if (alg_a & SSL_aDSS)
2368                 return SSL_PKEY_DSA_SIGN;
2369         else if (alg_a & SSL_aRSA)
2370                 {
2371                 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2372                         return SSL_PKEY_RSA_SIGN;
2373                 else
2374                         return SSL_PKEY_RSA_ENC;
2375                 }
2376         else if (alg_a & SSL_aKRB5)
2377                 /* VRS something else here? */
2378                 return -1;
2379         else if (alg_a & SSL_aGOST94)
2380                 return SSL_PKEY_GOST94;
2381         else if (alg_a & SSL_aGOST01)
2382                 return SSL_PKEY_GOST01;
2383         else /* if (alg_a & SSL_aNULL) */
2384                 {
2385                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2386                 return -1;
2387                 }
2388         }
2389
2390 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2391         {
2392         CERT *c;
2393         int i;
2394
2395         c = s->cert;
2396         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2397
2398         i = ssl_get_server_cert_index(s);
2399
2400         /* This may or may not be an error. */
2401         if (i < 0)
2402                 return NULL;
2403
2404         /* May be NULL. */
2405         return &c->pkeys[i];
2406         }
2407
2408 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2409         {
2410         unsigned long alg_a;
2411         CERT *c;
2412         int idx = -1;
2413
2414         alg_a = cipher->algorithm_auth;
2415         c=s->cert;
2416
2417         if ((alg_a & SSL_aDSS) &&
2418                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2419                 idx = SSL_PKEY_DSA_SIGN;
2420         else if (alg_a & SSL_aRSA)
2421                 {
2422                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2423                         idx = SSL_PKEY_RSA_SIGN;
2424                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2425                         idx = SSL_PKEY_RSA_ENC;
2426                 }
2427         else if ((alg_a & SSL_aECDSA) &&
2428                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2429                 idx = SSL_PKEY_ECC;
2430         if (idx == -1)
2431                 {
2432                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2433                 return(NULL);
2434                 }
2435         if (pmd)
2436                 *pmd = c->pkeys[idx].digest;
2437         return c->pkeys[idx].privatekey;
2438         }
2439
2440 #ifndef OPENSSL_NO_TLSEXT
2441 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2442         {
2443         CERT *c;
2444         int i;
2445
2446         c = s->cert;
2447         i = ssl_get_server_cert_index(s);
2448
2449         if (i == -1)
2450                 return NULL;
2451
2452         *authz_length = 0;
2453         if (c->pkeys[i].authz == NULL)
2454                 return(NULL);
2455         *authz_length = c->pkeys[i].authz_length;
2456
2457         return c->pkeys[i].authz;
2458         }
2459 #endif
2460
2461 void ssl_update_cache(SSL *s,int mode)
2462         {
2463         int i;
2464
2465         /* If the session_id_length is 0, we are not supposed to cache it,
2466          * and it would be rather hard to do anyway :-) */
2467         if (s->session->session_id_length == 0) return;
2468
2469         i=s->session_ctx->session_cache_mode;
2470         if ((i & mode) && (!s->hit)
2471                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2472                     || SSL_CTX_add_session(s->session_ctx,s->session))
2473                 && (s->session_ctx->new_session_cb != NULL))
2474                 {
2475                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2476                 if (!s->session_ctx->new_session_cb(s,s->session))
2477                         SSL_SESSION_free(s->session);
2478                 }
2479
2480         /* auto flush every 255 connections */
2481         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2482                 ((i & mode) == mode))
2483                 {
2484                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2485                         ?s->session_ctx->stats.sess_connect_good
2486                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2487                         {
2488                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2489                         }
2490                 }
2491         }
2492
2493 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2494         {
2495         return(s->method);
2496         }
2497
2498 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2499         {
2500         int conn= -1;
2501         int ret=1;
2502
2503         if (s->method != meth)
2504                 {
2505                 if (s->handshake_func != NULL)
2506                         conn=(s->handshake_func == s->method->ssl_connect);
2507
2508                 if (s->method->version == meth->version)
2509                         s->method=meth;
2510                 else
2511                         {
2512                         s->method->ssl_free(s);
2513                         s->method=meth;
2514                         ret=s->method->ssl_new(s);
2515                         }
2516
2517                 if (conn == 1)
2518                         s->handshake_func=meth->ssl_connect;
2519                 else if (conn == 0)
2520                         s->handshake_func=meth->ssl_accept;
2521                 }
2522         return(ret);
2523         }
2524
2525 int SSL_get_error(const SSL *s,int i)
2526         {
2527         int reason;
2528         unsigned long l;
2529         BIO *bio;
2530
2531         if (i > 0) return(SSL_ERROR_NONE);
2532
2533         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2534          * etc, where we do encode the error */
2535         if ((l=ERR_peek_error()) != 0)
2536                 {
2537                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2538                         return(SSL_ERROR_SYSCALL);
2539                 else
2540                         return(SSL_ERROR_SSL);
2541                 }
2542
2543         if ((i < 0) && SSL_want_read(s))
2544                 {
2545                 bio=SSL_get_rbio(s);
2546                 if (BIO_should_read(bio))
2547                         return(SSL_ERROR_WANT_READ);
2548                 else if (BIO_should_write(bio))
2549                         /* This one doesn't make too much sense ... We never try
2550                          * to write to the rbio, and an application program where
2551                          * rbio and wbio are separate couldn't even know what it
2552                          * should wait for.
2553                          * However if we ever set s->rwstate incorrectly
2554                          * (so that we have SSL_want_read(s) instead of
2555                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2556                          * this test works around that bug; so it might be safer
2557                          * to keep it. */
2558                         return(SSL_ERROR_WANT_WRITE);
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); /* unknown */
2568                         }
2569                 }
2570
2571         if ((i < 0) && SSL_want_write(s))
2572                 {
2573                 bio=SSL_get_wbio(s);
2574                 if (BIO_should_write(bio))
2575                         return(SSL_ERROR_WANT_WRITE);
2576                 else if (BIO_should_read(bio))
2577                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2578                         return(SSL_ERROR_WANT_READ);
2579                 else if (BIO_should_io_special(bio))
2580                         {
2581                         reason=BIO_get_retry_reason(bio);
2582                         if (reason == BIO_RR_CONNECT)
2583                                 return(SSL_ERROR_WANT_CONNECT);
2584                         else if (reason == BIO_RR_ACCEPT)
2585                                 return(SSL_ERROR_WANT_ACCEPT);
2586                         else
2587                                 return(SSL_ERROR_SYSCALL);
2588                         }
2589                 }
2590         if ((i < 0) && SSL_want_x509_lookup(s))
2591                 {
2592                 return(SSL_ERROR_WANT_X509_LOOKUP);
2593                 }
2594
2595         if (i == 0)
2596                 {
2597                 if (s->version == SSL2_VERSION)
2598                         {
2599                         /* assume it is the socket being closed */
2600                         return(SSL_ERROR_ZERO_RETURN);
2601                         }
2602                 else
2603                         {
2604                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2605                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2606                                 return(SSL_ERROR_ZERO_RETURN);
2607                         }
2608                 }
2609         return(SSL_ERROR_SYSCALL);
2610         }
2611
2612 int SSL_do_handshake(SSL *s)
2613         {
2614         int ret=1;
2615
2616         if (s->handshake_func == NULL)
2617                 {
2618                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2619                 return(-1);
2620                 }
2621
2622         s->method->ssl_renegotiate_check(s);
2623
2624         if (SSL_in_init(s) || SSL_in_before(s))
2625                 {
2626                 ret=s->handshake_func(s);
2627                 }
2628         return(ret);
2629         }
2630
2631 /* For the next 2 functions, SSL_clear() sets shutdown and so
2632  * one of these calls will reset it */
2633 void SSL_set_accept_state(SSL *s)
2634         {
2635         s->server=1;
2636         s->shutdown=0;
2637         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2638         s->handshake_func=s->method->ssl_accept;
2639         /* clear the current cipher */
2640         ssl_clear_cipher_ctx(s);
2641         ssl_clear_hash_ctx(&s->read_hash);
2642         ssl_clear_hash_ctx(&s->write_hash);
2643         }
2644
2645 void SSL_set_connect_state(SSL *s)
2646         {
2647         s->server=0;
2648         s->shutdown=0;
2649         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2650         s->handshake_func=s->method->ssl_connect;
2651         /* clear the current cipher */
2652         ssl_clear_cipher_ctx(s);
2653         ssl_clear_hash_ctx(&s->read_hash);
2654         ssl_clear_hash_ctx(&s->write_hash);
2655         }
2656
2657 int ssl_undefined_function(SSL *s)
2658         {
2659         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2660         return(0);
2661         }
2662
2663 int ssl_undefined_void_function(void)
2664         {
2665         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2666         return(0);
2667         }
2668
2669 int ssl_undefined_const_function(const SSL *s)
2670         {
2671         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2672         return(0);
2673         }
2674
2675 SSL_METHOD *ssl_bad_method(int ver)
2676         {
2677         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2678         return(NULL);
2679         }
2680
2681 const char *SSL_get_version(const SSL *s)
2682         {
2683         if (s->version == TLS1_2_VERSION)
2684                 return("TLSv1.2");
2685         else if (s->version == TLS1_1_VERSION)
2686                 return("TLSv1.1");
2687         else if (s->version == TLS1_VERSION)
2688                 return("TLSv1");
2689         else if (s->version == SSL3_VERSION)
2690                 return("SSLv3");
2691         else if (s->version == SSL2_VERSION)
2692                 return("SSLv2");
2693         else
2694                 return("unknown");
2695         }
2696
2697 SSL *SSL_dup(SSL *s)
2698         {
2699         STACK_OF(X509_NAME) *sk;
2700         X509_NAME *xn;
2701         SSL *ret;
2702         int i;
2703
2704         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2705             return(NULL);
2706
2707         ret->version = s->version;
2708         ret->type = s->type;
2709         ret->method = s->method;
2710
2711         if (s->session != NULL)
2712                 {
2713                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2714                 SSL_copy_session_id(ret,s);
2715                 }
2716         else
2717                 {
2718                 /* No session has been established yet, so we have to expect
2719                  * that s->cert or ret->cert will be changed later --
2720                  * they should not both point to the same object,
2721                  * and thus we can't use SSL_copy_session_id. */
2722
2723                 ret->method->ssl_free(ret);
2724                 ret->method = s->method;
2725                 ret->method->ssl_new(ret);
2726
2727                 if (s->cert != NULL)
2728                         {
2729                         if (ret->cert != NULL)
2730                                 {
2731                                 ssl_cert_free(ret->cert);
2732                                 }
2733                         ret->cert = ssl_cert_dup(s->cert);
2734                         if (ret->cert == NULL)
2735                                 goto err;
2736                         }
2737
2738                 SSL_set_session_id_context(ret,
2739                         s->sid_ctx, s->sid_ctx_length);
2740                 }
2741
2742         ret->options=s->options;
2743         ret->mode=s->mode;
2744         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2745         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2746         ret->msg_callback = s->msg_callback;
2747         ret->msg_callback_arg = s->msg_callback_arg;
2748         SSL_set_verify(ret,SSL_get_verify_mode(s),
2749                 SSL_get_verify_callback(s));
2750         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2751         ret->generate_session_id = s->generate_session_id;
2752
2753         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2754
2755         ret->debug=s->debug;
2756
2757         /* copy app data, a little dangerous perhaps */
2758         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2759                 goto err;
2760
2761         /* setup rbio, and wbio */
2762         if (s->rbio != NULL)
2763                 {
2764                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2765                         goto err;
2766                 }
2767         if (s->wbio != NULL)
2768                 {
2769                 if (s->wbio != s->rbio)
2770                         {
2771                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2772                                 goto err;
2773                         }
2774                 else
2775                         ret->wbio=ret->rbio;
2776                 }
2777         ret->rwstate = s->rwstate;
2778         ret->in_handshake = s->in_handshake;
2779         ret->handshake_func = s->handshake_func;
2780         ret->server = s->server;
2781         ret->renegotiate = s->renegotiate;
2782         ret->new_session = s->new_session;
2783         ret->quiet_shutdown = s->quiet_shutdown;
2784         ret->shutdown=s->shutdown;
2785         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2786         ret->rstate=s->rstate;
2787         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2788         ret->hit=s->hit;
2789
2790         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2791
2792         /* dup the cipher_list and cipher_list_by_id stacks */
2793         if (s->cipher_list != NULL)
2794                 {
2795                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2796                         goto err;
2797                 }
2798         if (s->cipher_list_by_id != NULL)
2799                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2800                         == NULL)
2801                         goto err;
2802
2803         /* Dup the client_CA list */
2804         if (s->client_CA != NULL)
2805                 {
2806                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2807                 ret->client_CA=sk;
2808                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2809                         {
2810                         xn=sk_X509_NAME_value(sk,i);
2811                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2812                                 {
2813                                 X509_NAME_free(xn);
2814                                 goto err;
2815                                 }
2816                         }
2817                 }
2818
2819         if (0)
2820                 {
2821 err:
2822                 if (ret != NULL) SSL_free(ret);
2823                 ret=NULL;
2824                 }
2825         return(ret);
2826         }
2827
2828 void ssl_clear_cipher_ctx(SSL *s)
2829         {
2830         if (s->enc_read_ctx != NULL)
2831                 {
2832                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2833                 OPENSSL_free(s->enc_read_ctx);
2834                 s->enc_read_ctx=NULL;
2835                 }
2836         if (s->enc_write_ctx != NULL)
2837                 {
2838                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2839                 OPENSSL_free(s->enc_write_ctx);
2840                 s->enc_write_ctx=NULL;
2841                 }
2842 #ifndef OPENSSL_NO_COMP
2843         if (s->expand != NULL)
2844                 {
2845                 COMP_CTX_free(s->expand);
2846                 s->expand=NULL;
2847                 }
2848         if (s->compress != NULL)
2849                 {
2850                 COMP_CTX_free(s->compress);
2851                 s->compress=NULL;
2852                 }
2853 #endif
2854         }
2855
2856 /* Fix this function so that it takes an optional type parameter */
2857 X509 *SSL_get_certificate(const SSL *s)
2858         {
2859         if (s->cert != NULL)
2860                 return(s->cert->key->x509);
2861         else
2862                 return(NULL);
2863         }
2864
2865 /* Fix this function so that it takes an optional type parameter */
2866 EVP_PKEY *SSL_get_privatekey(SSL *s)
2867         {
2868         if (s->cert != NULL)
2869                 return(s->cert->key->privatekey);
2870         else
2871                 return(NULL);
2872         }
2873
2874 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2875         {
2876         if ((s->session != NULL) && (s->session->cipher != NULL))
2877                 return(s->session->cipher);
2878         return(NULL);
2879         }
2880 #ifdef OPENSSL_NO_COMP
2881 const void *SSL_get_current_compression(SSL *s)
2882         {
2883         return NULL;
2884         }
2885 const void *SSL_get_current_expansion(SSL *s)
2886         {
2887         return NULL;
2888         }
2889 #else
2890
2891 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2892         {
2893         if (s->compress != NULL)
2894                 return(s->compress->meth);
2895         return(NULL);
2896         }
2897
2898 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2899         {
2900         if (s->expand != NULL)
2901                 return(s->expand->meth);
2902         return(NULL);
2903         }
2904 #endif
2905
2906 int ssl_init_wbio_buffer(SSL *s,int push)
2907         {
2908         BIO *bbio;
2909
2910         if (s->bbio == NULL)
2911                 {
2912                 bbio=BIO_new(BIO_f_buffer());
2913                 if (bbio == NULL) return(0);
2914                 s->bbio=bbio;
2915                 }
2916         else
2917                 {
2918                 bbio=s->bbio;
2919                 if (s->bbio == s->wbio)
2920                         s->wbio=BIO_pop(s->wbio);
2921                 }
2922         (void)BIO_reset(bbio);
2923 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2924         if (!BIO_set_read_buffer_size(bbio,1))
2925                 {
2926                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2927                 return(0);
2928                 }
2929         if (push)
2930                 {
2931                 if (s->wbio != bbio)
2932                         s->wbio=BIO_push(bbio,s->wbio);
2933                 }
2934         else
2935                 {
2936                 if (s->wbio == bbio)
2937                         s->wbio=BIO_pop(bbio);
2938                 }
2939         return(1);
2940         }
2941
2942 void ssl_free_wbio_buffer(SSL *s)
2943         {
2944         if (s->bbio == NULL) return;
2945
2946         if (s->bbio == s->wbio)
2947                 {
2948                 /* remove buffering */
2949                 s->wbio=BIO_pop(s->wbio);
2950 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2951                 assert(s->wbio != NULL);
2952 #endif
2953         }
2954         BIO_free(s->bbio);
2955         s->bbio=NULL;
2956         }
2957
2958 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2959         {
2960         ctx->quiet_shutdown=mode;
2961         }
2962
2963 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2964         {
2965         return(ctx->quiet_shutdown);
2966         }
2967
2968 void SSL_set_quiet_shutdown(SSL *s,int mode)
2969         {
2970         s->quiet_shutdown=mode;
2971         }
2972
2973 int SSL_get_quiet_shutdown(const SSL *s)
2974         {
2975         return(s->quiet_shutdown);
2976         }
2977
2978 void SSL_set_shutdown(SSL *s,int mode)
2979         {
2980         s->shutdown=mode;
2981         }
2982
2983 int SSL_get_shutdown(const SSL *s)
2984         {
2985         return(s->shutdown);
2986         }
2987
2988 int SSL_version(const SSL *s)
2989         {
2990         return(s->version);
2991         }
2992
2993 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2994         {
2995         return(ssl->ctx);
2996         }
2997
2998 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2999         {
3000         if (ssl->ctx == ctx)
3001                 return ssl->ctx;
3002 #ifndef OPENSSL_NO_TLSEXT
3003         if (ctx == NULL)
3004                 ctx = ssl->initial_ctx;
3005 #endif
3006         if (ssl->cert != NULL)
3007                 ssl_cert_free(ssl->cert);
3008         ssl->cert = ssl_cert_dup(ctx->cert);
3009         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3010         if (ssl->ctx != NULL)
3011                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3012         ssl->ctx = ctx;
3013         return(ssl->ctx);
3014         }
3015
3016 #ifndef OPENSSL_NO_STDIO
3017 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3018         {
3019         return(X509_STORE_set_default_paths(ctx->cert_store));
3020         }
3021
3022 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3023                 const char *CApath)
3024         {
3025         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3026         }
3027 #endif
3028
3029 void SSL_set_info_callback(SSL *ssl,
3030         void (*cb)(const SSL *ssl,int type,int val))
3031         {
3032         ssl->info_callback=cb;
3033         }
3034
3035 /* One compiler (Diab DCC) doesn't like argument names in returned
3036    function pointer.  */
3037 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3038         {
3039         return ssl->info_callback;
3040         }
3041
3042 int SSL_state(const SSL *ssl)
3043         {
3044         return(ssl->state);
3045         }
3046
3047 void SSL_set_state(SSL *ssl, int state)
3048         {
3049         ssl->state = state;
3050         }
3051
3052 void SSL_set_verify_result(SSL *ssl,long arg)
3053         {
3054         ssl->verify_result=arg;
3055         }
3056
3057 long SSL_get_verify_result(const SSL *ssl)
3058         {
3059         return(ssl->verify_result);
3060         }
3061
3062 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3063                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3064         {
3065         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3066                                 new_func, dup_func, free_func);
3067         }
3068
3069 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3070         {
3071         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3072         }
3073
3074 void *SSL_get_ex_data(const SSL *s,int idx)
3075         {
3076         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3077         }
3078
3079 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3080                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3081         {
3082         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3083                                 new_func, dup_func, free_func);
3084         }
3085
3086 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3087         {
3088         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3089         }
3090
3091 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3092         {
3093         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3094         }
3095
3096 int ssl_ok(SSL *s)
3097         {
3098         return(1);
3099         }
3100
3101 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3102         {
3103         return(ctx->cert_store);
3104         }
3105
3106 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3107         {
3108         if (ctx->cert_store != NULL)
3109                 X509_STORE_free(ctx->cert_store);
3110         ctx->cert_store=store;
3111         }
3112
3113 int SSL_want(const SSL *s)
3114         {
3115         return(s->rwstate);
3116         }
3117
3118 /*!
3119  * \brief Set the callback for generating temporary RSA keys.
3120  * \param ctx the SSL context.
3121  * \param cb the callback
3122  */
3123
3124 #ifndef OPENSSL_NO_RSA
3125 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3126                                                           int is_export,
3127                                                           int keylength))
3128     {
3129     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3130     }
3131
3132 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3133                                                   int is_export,
3134                                                   int keylength))
3135     {
3136     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3137     }
3138 #endif
3139
3140 #ifdef DOXYGEN
3141 /*!
3142  * \brief The RSA temporary key callback function.
3143  * \param ssl the SSL session.
3144  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3145  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3146  * of the required key in bits.
3147  * \return the temporary RSA key.
3148  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3149  */
3150
3151 RSA *cb(SSL *ssl,int is_export,int keylength)
3152     {}
3153 #endif
3154
3155 /*!
3156  * \brief Set the callback for generating temporary DH keys.
3157  * \param ctx the SSL context.
3158  * \param dh the callback
3159  */
3160
3161 #ifndef OPENSSL_NO_DH
3162 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3163                                                         int keylength))
3164         {
3165         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3166         }
3167
3168 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3169                                                 int keylength))
3170         {
3171         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3172         }
3173 #endif
3174
3175 #ifndef OPENSSL_NO_ECDH
3176 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3177                                                                 int keylength))
3178         {
3179         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3180         }
3181
3182 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3183                                                         int keylength))
3184         {
3185         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3186         }
3187 #endif
3188
3189 #ifndef OPENSSL_NO_PSK
3190 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3191         {
3192         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3193                 {
3194                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3195                 return 0;
3196                 }
3197         if (ctx->psk_identity_hint != NULL)
3198                 OPENSSL_free(ctx->psk_identity_hint);
3199         if (identity_hint != NULL)
3200                 {
3201                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3202                 if (ctx->psk_identity_hint == NULL)
3203                         return 0;
3204                 }
3205         else
3206                 ctx->psk_identity_hint = NULL;
3207         return 1;
3208         }
3209
3210 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3211         {
3212         if (s == NULL)
3213                 return 0;
3214
3215         if (s->session == NULL)
3216                 return 1; /* session not created yet, ignored */
3217
3218         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3219                 {
3220                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3221                 return 0;
3222                 }
3223         if (s->session->psk_identity_hint != NULL)
3224                 OPENSSL_free(s->session->psk_identity_hint);
3225         if (identity_hint != NULL)
3226                 {
3227                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3228                 if (s->session->psk_identity_hint == NULL)
3229                         return 0;
3230                 }
3231         else
3232                 s->session->psk_identity_hint = NULL;
3233         return 1;
3234         }
3235
3236 const char *SSL_get_psk_identity_hint(const SSL *s)
3237         {
3238         if (s == NULL || s->session == NULL)
3239                 return NULL;
3240         return(s->session->psk_identity_hint);
3241         }
3242
3243 const char *SSL_get_psk_identity(const SSL *s)
3244         {
3245         if (s == NULL || s->session == NULL)
3246                 return NULL;
3247         return(s->session->psk_identity);
3248         }
3249
3250 void SSL_set_psk_client_callback(SSL *s,
3251     unsigned int (*cb)(SSL *ssl, const char *hint,
3252                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3253                        unsigned int max_psk_len))
3254         {
3255         s->psk_client_callback = cb;
3256         }
3257
3258 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3259     unsigned int (*cb)(SSL *ssl, const char *hint,
3260                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3261                        unsigned int max_psk_len))
3262         {
3263         ctx->psk_client_callback = cb;
3264         }
3265
3266 void SSL_set_psk_server_callback(SSL *s,
3267     unsigned int (*cb)(SSL *ssl, const char *identity,
3268                        unsigned char *psk, unsigned int max_psk_len))
3269         {
3270         s->psk_server_callback = cb;
3271         }
3272
3273 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3274     unsigned int (*cb)(SSL *ssl, const char *identity,
3275                        unsigned char *psk, unsigned int max_psk_len))
3276         {
3277         ctx->psk_server_callback = cb;
3278         }
3279 #endif
3280
3281 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))
3282         {
3283         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3284         }
3285 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))
3286         {
3287         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3288         }
3289
3290 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3291  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3292  * any. If EVP_MD pointer is passed, initializes ctx with this md
3293  * Returns newly allocated ctx;
3294  */
3295
3296 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3297 {
3298         ssl_clear_hash_ctx(hash);
3299         *hash = EVP_MD_CTX_create();
3300         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3301         return *hash;
3302 }
3303 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3304 {
3305
3306         if (*hash) EVP_MD_CTX_destroy(*hash);
3307         *hash=NULL;
3308 }
3309
3310 void SSL_set_debug(SSL *s, int debug)
3311         {
3312         s->debug = debug;
3313         }
3314
3315 int SSL_cache_hit(SSL *s)
3316         {
3317         return s->hit;
3318         }
3319
3320 int SSL_is_server(SSL *s)
3321         {
3322         return s->server;
3323         }
3324
3325 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3326 #include "../crypto/bio/bss_file.c"
3327 #endif
3328
3329 IMPLEMENT_STACK_OF(SSL_CIPHER)
3330 IMPLEMENT_STACK_OF(SSL_COMP)
3331 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3332                                     ssl_cipher_id);