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