src/third_party/openssl/openssl/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->session_creation_enabled=1;
 333         s->generate_session_id=ctx->generate_session_id;
 334
 335         s->param = X509_VERIFY_PARAM_new();
 336         if (!s->param)
 337                 goto err;
 338         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 339 #if 0
 340         s->purpose = ctx->purpose;
 341         s->trust = ctx->trust;
 342 #endif
 343         s->quiet_shutdown=ctx->quiet_shutdown;
 344         s->max_send_fragment = ctx->max_send_fragment;
 345
 346         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 347         s->ctx=ctx;
 348 #ifndef OPENSSL_NO_TLSEXT
 349         s->tlsext_debug_cb = 0;
 350         s->tlsext_debug_arg = NULL;
 351         s->tlsext_ticket_expected = 0;
 352         s->tlsext_status_type = -1;
 353         s->tlsext_status_expected = 0;
 354         s->tlsext_ocsp_ids = NULL;
 355         s->tlsext_ocsp_exts = NULL;
 356         s->tlsext_ocsp_resp = NULL;
 357         s->tlsext_ocsp_resplen = -1;
 358         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 359         s->initial_ctx=ctx;
 360 # ifndef OPENSSL_NO_NEXTPROTONEG
 361         s->next_proto_negotiated = NULL;
 362 # endif
 363 #endif
 364
 365         s->verify_result=X509_V_OK;
 366
 367         s->method=ctx->method;
 368
 369         if (!s->method->ssl_new(s))
 370                 goto err;
 371
 372         s->references=1;
 373         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 374
 375         SSL_clear(s);
 376
 377         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 378
 379 #ifndef OPENSSL_NO_PSK
 380         s->psk_client_callback=ctx->psk_client_callback;
 381         s->psk_server_callback=ctx->psk_server_callback;
 382 #endif
 383
 384         return(s);
 385 err:
 386         if (s != NULL)
 387                 {
 388                 if (s->cert != NULL)
 389                         ssl_cert_free(s->cert);
 390                 if (s->ctx != NULL)
 391                         SSL_CTX_free(s->ctx); /* decrement reference count */
 392                 OPENSSL_free(s);
 393                 }
 394         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 395         return(NULL);
 396         }
 397
 398 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 399                                    unsigned int sid_ctx_len)
 400     {
 401     if(sid_ctx_len > sizeof ctx->sid_ctx)
 402         {
 403         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 404         return 0;
 405         }
 406     ctx->sid_ctx_length=sid_ctx_len;
 407     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 408
 409     return 1;
 410     }
 411
 412 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 413                                unsigned int sid_ctx_len)
 414     {
 415     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 416         {
 417         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 418         return 0;
 419         }
 420     ssl->sid_ctx_length=sid_ctx_len;
 421     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 422
 423     return 1;
 424     }
 425
 426 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 427         {
 428         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 429         ctx->generate_session_id = cb;
 430         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 431         return 1;
 432         }
 433
 434 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 435         {
 436         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 437         ssl->generate_session_id = cb;
 438         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 439         return 1;
 440         }
 441
 442 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 443                                 unsigned int id_len)
 444         {
 445         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 446          * we can "construct" a session to give us the desired check - ie. to
 447          * find if there's a session in the hash table that would conflict with
 448          * any new session built out of this id/id_len and the ssl_version in
 449          * use by this SSL. */
 450         SSL_SESSION r, *p;
 451
 452         if(id_len > sizeof r.session_id)
 453                 return 0;
 454
 455         r.ssl_version = ssl->version;
 456         r.session_id_length = id_len;
 457         memcpy(r.session_id, id, id_len);
 458         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 459          * callback is calling us to check the uniqueness of a shorter ID, it
 460          * must be compared as a padded-out ID because that is what it will be
 461          * converted to when the callback has finished choosing it. */
 462         if((r.ssl_version == SSL2_VERSION) &&
 463                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 464                 {
 465                 memset(r.session_id + id_len, 0,
 466                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 467                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 468                 }
 469
 470         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 471         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 472         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 473         return (p != NULL);
 474         }
 475
 476 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 477         {
 478         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 479         }
 480
 481 int SSL_set_purpose(SSL *s, int purpose)
 482         {
 483         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 484         }
 485
 486 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 487         {
 488         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 489         }
 490
 491 int SSL_set_trust(SSL *s, int trust)
 492         {
 493         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 494         }
 495
 496 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 497         {
 498         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 499         }
 500
 501 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 502         {
 503         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 504         }
 505
 506 void SSL_free(SSL *s)
 507         {
 508         int i;
 509
 510         if(s == NULL)
 511             return;
 512
 513         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 514 #ifdef REF_PRINT
 515         REF_PRINT("SSL",s);
 516 #endif
 517         if (i > 0) return;
 518 #ifdef REF_CHECK
 519         if (i < 0)
 520                 {
 521                 fprintf(stderr,"SSL_free, bad reference count\n");
 522                 abort(); /* ok */
 523                 }
 524 #endif
 525
 526         if (s->param)
 527                 X509_VERIFY_PARAM_free(s->param);
 528
 529         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 530
 531         if (s->bbio != NULL)
 532                 {
 533                 /* If the buffering BIO is in place, pop it off */
 534                 if (s->bbio == s->wbio)
 535                         {
 536                         s->wbio=BIO_pop(s->wbio);
 537                         }
 538                 BIO_free(s->bbio);
 539                 s->bbio=NULL;
 540                 }
 541         if (s->rbio != NULL)
 542                 BIO_free_all(s->rbio);
 543         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 544                 BIO_free_all(s->wbio);
 545
 546         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 547
 548         /* add extra stuff */
 549         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 550         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 551
 552         /* Make the next call work :-) */
 553         if (s->session != NULL)
 554                 {
 555                 ssl_clear_bad_session(s);
 556                 SSL_SESSION_free(s->session);
 557                 }
 558
 559         ssl_clear_cipher_ctx(s);
 560         ssl_clear_hash_ctx(&s->read_hash);
 561         ssl_clear_hash_ctx(&s->write_hash);
 562
 563         if (s->cert != NULL) ssl_cert_free(s->cert);
 564         /* Free up if allocated */
 565
 566 #ifndef OPENSSL_NO_TLSEXT
 567         if (s->tlsext_hostname)
 568                 OPENSSL_free(s->tlsext_hostname);
 569         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 570 #ifndef OPENSSL_NO_EC
 571         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 572         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 573 #endif /* OPENSSL_NO_EC */
 574         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 575         if (s->tlsext_ocsp_exts)
 576                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 577                                                 X509_EXTENSION_free);
 578         if (s->tlsext_ocsp_ids)
 579                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 580         if (s->tlsext_ocsp_resp)
 581                 OPENSSL_free(s->tlsext_ocsp_resp);
 582         if (s->tlsext_channel_id_private)
 583                 EVP_PKEY_free(s->tlsext_channel_id_private);
 584 #endif
 585
 586         if (s->client_CA != NULL)
 587                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 588
 589         if (s->method != NULL) s->method->ssl_free(s);
 590
 591         if (s->ctx) SSL_CTX_free(s->ctx);
 592
 593 #ifndef OPENSSL_NO_KRB5
 594         if (s->kssl_ctx != NULL)
 595                 kssl_ctx_free(s->kssl_ctx);
 596 #endif  /* OPENSSL_NO_KRB5 */
 597
 598 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 599         if (s->next_proto_negotiated)
 600                 OPENSSL_free(s->next_proto_negotiated);
 601 #endif
 602
 603 #ifndef OPENSSL_NO_SRTP
 604         if (s->srtp_profiles)
 605             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 606 #endif
 607
 608         OPENSSL_free(s);
 609         }
 610
 611 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 612         {
 613         /* If the output buffering BIO is still in place, remove it
 614          */
 615         if (s->bbio != NULL)
 616                 {
 617                 if (s->wbio == s->bbio)
 618                         {
 619                         s->wbio=s->wbio->next_bio;
 620                         s->bbio->next_bio=NULL;
 621                         }
 622                 }
 623         if ((s->rbio != NULL) && (s->rbio != rbio))
 624                 BIO_free_all(s->rbio);
 625         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 626                 BIO_free_all(s->wbio);
 627         s->rbio=rbio;
 628         s->wbio=wbio;
 629         }
 630
 631 BIO *SSL_get_rbio(const SSL *s)
 632         { return(s->rbio); }
 633
 634 BIO *SSL_get_wbio(const SSL *s)
 635         { return(s->wbio); }
 636
 637 int SSL_get_fd(const SSL *s)
 638         {
 639         return(SSL_get_rfd(s));
 640         }
 641
 642 int SSL_get_rfd(const SSL *s)
 643         {
 644         int ret= -1;
 645         BIO *b,*r;
 646
 647         b=SSL_get_rbio(s);
 648         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 649         if (r != NULL)
 650                 BIO_get_fd(r,&ret);
 651         return(ret);
 652         }
 653
 654 int SSL_get_wfd(const SSL *s)
 655         {
 656         int ret= -1;
 657         BIO *b,*r;
 658
 659         b=SSL_get_wbio(s);
 660         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 661         if (r != NULL)
 662                 BIO_get_fd(r,&ret);
 663         return(ret);
 664         }
 665
 666 #ifndef OPENSSL_NO_SOCK
 667 int SSL_set_fd(SSL *s,int fd)
 668         {
 669         int ret=0;
 670         BIO *bio=NULL;
 671
 672         bio=BIO_new(BIO_s_socket());
 673
 674         if (bio == NULL)
 675                 {
 676                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 677                 goto err;
 678                 }
 679         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 680         SSL_set_bio(s,bio,bio);
 681         ret=1;
 682 err:
 683         return(ret);
 684         }
 685
 686 int SSL_set_wfd(SSL *s,int fd)
 687         {
 688         int ret=0;
 689         BIO *bio=NULL;
 690
 691         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 692                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 693                 {
 694                 bio=BIO_new(BIO_s_socket());
 695
 696                 if (bio == NULL)
 697                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 698                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 699                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 700                 }
 701         else
 702                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 703         ret=1;
 704 err:
 705         return(ret);
 706         }
 707
 708 int SSL_set_rfd(SSL *s,int fd)
 709         {
 710         int ret=0;
 711         BIO *bio=NULL;
 712
 713         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 714                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 715                 {
 716                 bio=BIO_new(BIO_s_socket());
 717
 718                 if (bio == NULL)
 719                         {
 720                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 721                         goto err;
 722                         }
 723                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 724                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 725                 }
 726         else
 727                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 728         ret=1;
 729 err:
 730         return(ret);
 731         }
 732 #endif
 733
 734
 735 /* return length of latest Finished message we sent, copy to 'buf' */
 736 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 737         {
 738         size_t ret = 0;
 739
 740         if (s->s3 != NULL)
 741                 {
 742                 ret = s->s3->tmp.finish_md_len;
 743                 if (count > ret)
 744                         count = ret;
 745                 memcpy(buf, s->s3->tmp.finish_md, count);
 746                 }
 747         return ret;
 748         }
 749
 750 /* return length of latest Finished message we expected, copy to 'buf' */
 751 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 752         {
 753         size_t ret = 0;
 754
 755         if (s->s3 != NULL)
 756                 {
 757                 ret = s->s3->tmp.peer_finish_md_len;
 758                 if (count > ret)
 759                         count = ret;
 760                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 761                 }
 762         return ret;
 763         }
 764
 765
 766 int SSL_get_verify_mode(const SSL *s)
 767         {
 768         return(s->verify_mode);
 769         }
 770
 771 int SSL_get_verify_depth(const SSL *s)
 772         {
 773         return X509_VERIFY_PARAM_get_depth(s->param);
 774         }
 775
 776 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 777         {
 778         return(s->verify_callback);
 779         }
 780
 781 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 782         {
 783         return(ctx->verify_mode);
 784         }
 785
 786 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 787         {
 788         return X509_VERIFY_PARAM_get_depth(ctx->param);
 789         }
 790
 791 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 792         {
 793         return(ctx->default_verify_callback);
 794         }
 795
 796 void SSL_set_verify(SSL *s,int mode,
 797                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 798         {
 799         s->verify_mode=mode;
 800         if (callback != NULL)
 801                 s->verify_callback=callback;
 802         }
 803
 804 void SSL_set_verify_depth(SSL *s,int depth)
 805         {
 806         X509_VERIFY_PARAM_set_depth(s->param, depth);
 807         }
 808
 809 void SSL_set_read_ahead(SSL *s,int yes)
 810         {
 811         s->read_ahead=yes;
 812         }
 813
 814 int SSL_get_read_ahead(const SSL *s)
 815         {
 816         return(s->read_ahead);
 817         }
 818
 819 int SSL_pending(const SSL *s)
 820         {
 821         /* SSL_pending cannot work properly if read-ahead is enabled
 822          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 823          * and it is impossible to fix since SSL_pending cannot report
 824          * errors that may be observed while scanning the new data.
 825          * (Note that SSL_pending() is often used as a boolean value,
 826          * so we'd better not return -1.)
 827          */
 828         return(s->method->ssl_pending(s));
 829         }
 830
 831 X509 *SSL_get_peer_certificate(const SSL *s)
 832         {
 833         X509 *r;
 834
 835         if ((s == NULL) || (s->session == NULL))
 836                 r=NULL;
 837         else
 838                 r=s->session->peer;
 839
 840         if (r == NULL) return(r);
 841
 842         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 843
 844         return(r);
 845         }
 846
 847 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 848         {
 849         STACK_OF(X509) *r;
 850
 851         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 852                 r=NULL;
 853         else
 854                 r=s->session->sess_cert->cert_chain;
 855
 856         /* If we are a client, cert_chain includes the peer's own
 857          * certificate; if we are a server, it does not. */
 858
 859         return(r);
 860         }
 861
 862 /* Now in theory, since the calling process own 't' it should be safe to
 863  * modify.  We need to be able to read f without being hassled */
 864 void SSL_copy_session_id(SSL *t,const SSL *f)
 865         {
 866         CERT *tmp;
 867
 868         /* Do we need to to SSL locking? */
 869         SSL_set_session(t,SSL_get_session(f));
 870
 871         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 872          * vice-versa */
 873         if (t->method != f->method)
 874                 {
 875                 t->method->ssl_free(t); /* cleanup current */
 876                 t->method=f->method;    /* change method */
 877                 t->method->ssl_new(t);  /* setup new */
 878                 }
 879
 880         tmp=t->cert;
 881         if (f->cert != NULL)
 882                 {
 883                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 884                 t->cert=f->cert;
 885                 }
 886         else
 887                 t->cert=NULL;
 888         if (tmp != NULL) ssl_cert_free(tmp);
 889         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 890         }
 891
 892 /* Fix this so it checks all the valid key/cert options */
 893 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 894         {
 895         if (    (ctx == NULL) ||
 896                 (ctx->cert == NULL) ||
 897                 (ctx->cert->key->x509 == NULL))
 898                 {
 899                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 900                 return(0);
 901                 }
 902         if      (ctx->cert->key->privatekey == NULL)
 903                 {
 904                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 905                 return(0);
 906                 }
 907         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 908         }
 909
 910 /* Fix this function so that it takes an optional type parameter */
 911 int SSL_check_private_key(const SSL *ssl)
 912         {
 913         if (ssl == NULL)
 914                 {
 915                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 916                 return(0);
 917                 }
 918         if (ssl->cert == NULL)
 919                 {
 920                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 921                 return 0;
 922                 }
 923         if (ssl->cert->key->x509 == NULL)
 924                 {
 925                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 926                 return(0);
 927                 }
 928         if (ssl->cert->key->privatekey == NULL)
 929                 {
 930                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 931                 return(0);
 932                 }
 933         return(X509_check_private_key(ssl->cert->key->x509,
 934                 ssl->cert->key->privatekey));
 935         }
 936
 937 int SSL_accept(SSL *s)
 938         {
 939         if (s->handshake_func == 0)
 940                 /* Not properly initialized yet */
 941                 SSL_set_accept_state(s);
 942
 943         return(s->method->ssl_accept(s));
 944         }
 945
 946 int SSL_connect(SSL *s)
 947         {
 948         if (s->handshake_func == 0)
 949                 /* Not properly initialized yet */
 950                 SSL_set_connect_state(s);
 951
 952         return(s->method->ssl_connect(s));
 953         }
 954
 955 long SSL_get_default_timeout(const SSL *s)
 956         {
 957         return(s->method->get_timeout());
 958         }
 959
 960 int SSL_read(SSL *s,void *buf,int num)
 961         {
 962         if (s->handshake_func == 0)
 963                 {
 964                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 965                 return -1;
 966                 }
 967
 968         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 969                 {
 970                 s->rwstate=SSL_NOTHING;
 971                 return(0);
 972                 }
 973         return(s->method->ssl_read(s,buf,num));
 974         }
 975
 976 int SSL_peek(SSL *s,void *buf,int num)
 977         {
 978         if (s->handshake_func == 0)
 979                 {
 980                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 981                 return -1;
 982                 }
 983
 984         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 985                 {
 986                 return(0);
 987                 }
 988         return(s->method->ssl_peek(s,buf,num));
 989         }
 990
 991 int SSL_write(SSL *s,const void *buf,int num)
 992         {
 993         if (s->handshake_func == 0)
 994                 {
 995                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 996                 return -1;
 997                 }
 998
 999         if (s->shutdown & SSL_SENT_SHUTDOWN)
1000                 {
1001                 s->rwstate=SSL_NOTHING;
1002                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1003                 return(-1);
1004                 }
1005         return(s->method->ssl_write(s,buf,num));
1006         }
1007
1008 int SSL_shutdown(SSL *s)
1009         {
1010         /* Note that this function behaves differently from what one might
1011          * expect.  Return values are 0 for no success (yet),
1012          * 1 for success; but calling it once is usually not enough,
1013          * even if blocking I/O is used (see ssl3_shutdown).
1014          */
1015
1016         if (s->handshake_func == 0)
1017                 {
1018                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1019                 return -1;
1020                 }
1021
1022         if ((s != NULL) && !SSL_in_init(s))
1023                 return(s->method->ssl_shutdown(s));
1024         else
1025                 return(1);
1026         }
1027
1028 int SSL_renegotiate(SSL *s)
1029         {
1030         if (s->renegotiate == 0)
1031                 s->renegotiate=1;
1032
1033         s->new_session=1;
1034
1035         return(s->method->ssl_renegotiate(s));
1036         }
1037
1038 int SSL_renegotiate_abbreviated(SSL *s)
1039         {
1040         if (s->renegotiate == 0)
1041                 s->renegotiate=1;
1042
1043         s->new_session=0;
1044
1045         return(s->method->ssl_renegotiate(s));
1046         }
1047
1048 int SSL_renegotiate_pending(SSL *s)
1049         {
1050         /* becomes true when negotiation is requested;
1051          * false again once a handshake has finished */
1052         return (s->renegotiate != 0);
1053         }
1054
1055 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1056         {
1057         long l;
1058
1059         switch (cmd)
1060                 {
1061         case SSL_CTRL_GET_READ_AHEAD:
1062                 return(s->read_ahead);
1063         case SSL_CTRL_SET_READ_AHEAD:
1064                 l=s->read_ahead;
1065                 s->read_ahead=larg;
1066                 return(l);
1067
1068         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1069                 s->msg_callback_arg = parg;
1070                 return 1;
1071
1072         case SSL_CTRL_OPTIONS:
1073                 return(s->options|=larg);
1074         case SSL_CTRL_CLEAR_OPTIONS:
1075                 return(s->options&=~larg);
1076         case SSL_CTRL_MODE:
1077                 return(s->mode|=larg);
1078         case SSL_CTRL_CLEAR_MODE:
1079                 return(s->mode &=~larg);
1080         case SSL_CTRL_GET_MAX_CERT_LIST:
1081                 return(s->max_cert_list);
1082         case SSL_CTRL_SET_MAX_CERT_LIST:
1083                 l=s->max_cert_list;
1084                 s->max_cert_list=larg;
1085                 return(l);
1086         case SSL_CTRL_SET_MTU:
1087 #ifndef OPENSSL_NO_DTLS1
1088                 if (larg < (long)dtls1_min_mtu())
1089                         return 0;
1090 #endif
1091
1092                 if (SSL_version(s) == DTLS1_VERSION ||
1093                     SSL_version(s) == DTLS1_BAD_VER)
1094                         {
1095                         s->d1->mtu = larg;
1096                         return larg;
1097                         }
1098                 return 0;
1099         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1100                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1101                         return 0;
1102                 s->max_send_fragment = larg;
1103                 return 1;
1104         case SSL_CTRL_GET_RI_SUPPORT:
1105                 if (s->s3)
1106                         return s->s3->send_connection_binding;
1107                 else return 0;
1108         default:
1109                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1110                 }
1111         }
1112
1113 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1114         {
1115         switch(cmd)
1116                 {
1117         case SSL_CTRL_SET_MSG_CALLBACK:
1118                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1119                 return 1;
1120
1121         default:
1122                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1123                 }
1124         }
1125
1126 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1127         {
1128         return ctx->sessions;
1129         }
1130
1131 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1132         {
1133         long l;
1134
1135         switch (cmd)
1136                 {
1137         case SSL_CTRL_GET_READ_AHEAD:
1138                 return(ctx->read_ahead);
1139         case SSL_CTRL_SET_READ_AHEAD:
1140                 l=ctx->read_ahead;
1141                 ctx->read_ahead=larg;
1142                 return(l);
1143
1144         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1145                 ctx->msg_callback_arg = parg;
1146                 return 1;
1147
1148         case SSL_CTRL_GET_MAX_CERT_LIST:
1149                 return(ctx->max_cert_list);
1150         case SSL_CTRL_SET_MAX_CERT_LIST:
1151                 l=ctx->max_cert_list;
1152                 ctx->max_cert_list=larg;
1153                 return(l);
1154
1155         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1156                 l=ctx->session_cache_size;
1157                 ctx->session_cache_size=larg;
1158                 return(l);
1159         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1160                 return(ctx->session_cache_size);
1161         case SSL_CTRL_SET_SESS_CACHE_MODE:
1162                 l=ctx->session_cache_mode;
1163                 ctx->session_cache_mode=larg;
1164                 return(l);
1165         case SSL_CTRL_GET_SESS_CACHE_MODE:
1166                 return(ctx->session_cache_mode);
1167
1168         case SSL_CTRL_SESS_NUMBER:
1169                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1170         case SSL_CTRL_SESS_CONNECT:
1171                 return(ctx->stats.sess_connect);
1172         case SSL_CTRL_SESS_CONNECT_GOOD:
1173                 return(ctx->stats.sess_connect_good);
1174         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1175                 return(ctx->stats.sess_connect_renegotiate);
1176         case SSL_CTRL_SESS_ACCEPT:
1177                 return(ctx->stats.sess_accept);
1178         case SSL_CTRL_SESS_ACCEPT_GOOD:
1179                 return(ctx->stats.sess_accept_good);
1180         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1181                 return(ctx->stats.sess_accept_renegotiate);
1182         case SSL_CTRL_SESS_HIT:
1183                 return(ctx->stats.sess_hit);
1184         case SSL_CTRL_SESS_CB_HIT:
1185                 return(ctx->stats.sess_cb_hit);
1186         case SSL_CTRL_SESS_MISSES:
1187                 return(ctx->stats.sess_miss);
1188         case SSL_CTRL_SESS_TIMEOUTS:
1189                 return(ctx->stats.sess_timeout);
1190         case SSL_CTRL_SESS_CACHE_FULL:
1191                 return(ctx->stats.sess_cache_full);
1192         case SSL_CTRL_OPTIONS:
1193                 return(ctx->options|=larg);
1194         case SSL_CTRL_CLEAR_OPTIONS:
1195                 return(ctx->options&=~larg);
1196         case SSL_CTRL_MODE:
1197                 return(ctx->mode|=larg);
1198         case SSL_CTRL_CLEAR_MODE:
1199                 return(ctx->mode&=~larg);
1200         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1201                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1202                         return 0;
1203                 ctx->max_send_fragment = larg;
1204                 return 1;
1205         default:
1206                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1207                 }
1208         }
1209
1210 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1211         {
1212         switch(cmd)
1213                 {
1214         case SSL_CTRL_SET_MSG_CALLBACK:
1215                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1216                 return 1;
1217
1218         default:
1219                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1220                 }
1221         }
1222
1223 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1224         {
1225         long l;
1226
1227         l=a->id-b->id;
1228         if (l == 0L)
1229                 return(0);
1230         else
1231                 return((l > 0)?1:-1);
1232         }
1233
1234 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1235                         const SSL_CIPHER * const *bp)
1236         {
1237         long l;
1238
1239         l=(*ap)->id-(*bp)->id;
1240         if (l == 0L)
1241                 return(0);
1242         else
1243                 return((l > 0)?1:-1);
1244         }
1245
1246 /** return a STACK of the ciphers available for the SSL and in order of
1247  * preference */
1248 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1249         {
1250         if (s != NULL)
1251                 {
1252                 if (s->cipher_list != NULL)
1253                         {
1254                         return(s->cipher_list);
1255                         }
1256                 else if ((s->ctx != NULL) &&
1257                         (s->ctx->cipher_list != NULL))
1258                         {
1259                         return(s->ctx->cipher_list);
1260                         }
1261                 }
1262         return(NULL);
1263         }
1264
1265 /** return a STACK of the ciphers available for the SSL and in order of
1266  * algorithm id */
1267 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1268         {
1269         if (s != NULL)
1270                 {
1271                 if (s->cipher_list_by_id != NULL)
1272                         {
1273                         return(s->cipher_list_by_id);
1274                         }
1275                 else if ((s->ctx != NULL) &&
1276                         (s->ctx->cipher_list_by_id != NULL))
1277                         {
1278                         return(s->ctx->cipher_list_by_id);
1279                         }
1280                 }
1281         return(NULL);
1282         }
1283
1284 /** The old interface to get the same thing as SSL_get_ciphers() */
1285 const char *SSL_get_cipher_list(const SSL *s,int n)
1286         {
1287         SSL_CIPHER *c;
1288         STACK_OF(SSL_CIPHER) *sk;
1289
1290         if (s == NULL) return(NULL);
1291         sk=SSL_get_ciphers(s);
1292         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1293                 return(NULL);
1294         c=sk_SSL_CIPHER_value(sk,n);
1295         if (c == NULL) return(NULL);
1296         return(c->name);
1297         }
1298
1299 /** specify the ciphers to be used by default by the SSL_CTX */
1300 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1301         {
1302         STACK_OF(SSL_CIPHER) *sk;
1303
1304         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1305                 &ctx->cipher_list_by_id,str);
1306         /* ssl_create_cipher_list may return an empty stack if it
1307          * was unable to find a cipher matching the given rule string
1308          * (for example if the rule string specifies a cipher which
1309          * has been disabled). This is not an error as far as
1310          * ssl_create_cipher_list is concerned, and hence
1311          * ctx->cipher_list and ctx->cipher_list_by_id has been
1312          * updated. */
1313         if (sk == NULL)
1314                 return 0;
1315         else if (sk_SSL_CIPHER_num(sk) == 0)
1316                 {
1317                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1318                 return 0;
1319                 }
1320         return 1;
1321         }
1322
1323 /** specify the ciphers to be used by the SSL */
1324 int SSL_set_cipher_list(SSL *s,const char *str)
1325         {
1326         STACK_OF(SSL_CIPHER) *sk;
1327
1328         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1329                 &s->cipher_list_by_id,str);
1330         /* see comment in SSL_CTX_set_cipher_list */
1331         if (sk == NULL)
1332                 return 0;
1333         else if (sk_SSL_CIPHER_num(sk) == 0)
1334                 {
1335                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1336                 return 0;
1337                 }
1338         return 1;
1339         }
1340
1341 /** specify the ciphers to be used by the SSL */
1342 int SSL_set_cipher_lists(SSL *s,STACK_OF(SSL_CIPHER) *sk)
1343         {
1344         STACK_OF(SSL_CIPHER) *tmp_cipher_list;
1345
1346         if (sk == NULL)
1347                 return 0;
1348
1349         /* Based on end of ssl_create_cipher_list */
1350         tmp_cipher_list = sk_SSL_CIPHER_dup(sk);
1351         if (tmp_cipher_list == NULL)
1352                 {
1353                 return 0;
1354                 }
1355         if (s->cipher_list != NULL)
1356                 sk_SSL_CIPHER_free(s->cipher_list);
1357         s->cipher_list = sk;
1358         if (s->cipher_list_by_id != NULL)
1359                 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1360         s->cipher_list_by_id = tmp_cipher_list;
1361         (void)sk_SSL_CIPHER_set_cmp_func(s->cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1362
1363         sk_SSL_CIPHER_sort(s->cipher_list_by_id);
1364         return 1;
1365         }
1366
1367 /* works well for SSLv2, not so good for SSLv3 */
1368 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1369         {
1370         char *p;
1371         STACK_OF(SSL_CIPHER) *sk;
1372         SSL_CIPHER *c;
1373         int i;
1374
1375         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1376                 (len < 2))
1377                 return(NULL);
1378
1379         p=buf;
1380         sk=s->session->ciphers;
1381         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1382                 {
1383                 int n;
1384
1385                 c=sk_SSL_CIPHER_value(sk,i);
1386                 n=strlen(c->name);
1387                 if (n+1 > len)
1388                         {
1389                         if (p != buf)
1390                                 --p;
1391                         *p='\0';
1392                         return buf;
1393                         }
1394                 strcpy(p,c->name);
1395                 p+=n;
1396                 *(p++)=':';
1397                 len-=n+1;
1398                 }
1399         p[-1]='\0';
1400         return(buf);
1401         }
1402
1403 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1404                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1405         {
1406         int i,j=0;
1407         SSL_CIPHER *c;
1408         unsigned char *q;
1409 #ifndef OPENSSL_NO_KRB5
1410         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1411 #endif /* OPENSSL_NO_KRB5 */
1412
1413         if (sk == NULL) return(0);
1414         q=p;
1415
1416         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1417                 {
1418                 c=sk_SSL_CIPHER_value(sk,i);
1419                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1420                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1421                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1422                         continue;
1423 #ifndef OPENSSL_NO_KRB5
1424                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1425                     nokrb5)
1426                     continue;
1427 #endif /* OPENSSL_NO_KRB5 */
1428 #ifndef OPENSSL_NO_PSK
1429                 /* with PSK there must be client callback set */
1430                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1431                     s->psk_client_callback == NULL)
1432                         continue;
1433 #endif /* OPENSSL_NO_PSK */
1434                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1435                 p+=j;
1436                 }
1437         /* If p == q, no ciphers and caller indicates an error. Otherwise
1438          * add SCSV if not renegotiating.
1439          */
1440         if (p != q && !s->renegotiate)
1441                 {
1442                 static SSL_CIPHER scsv =
1443                         {
1444                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1445                         };
1446                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1447                 p+=j;
1448 #ifdef OPENSSL_RI_DEBUG
1449                 fprintf(stderr, "SCSV sent by client\n");
1450 #endif
1451                 }
1452
1453         return(p-q);
1454         }
1455
1456 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1457                                                STACK_OF(SSL_CIPHER) **skp)
1458         {
1459         const SSL_CIPHER *c;
1460         STACK_OF(SSL_CIPHER) *sk;
1461         int i,n;
1462         if (s->s3)
1463                 s->s3->send_connection_binding = 0;
1464
1465         n=ssl_put_cipher_by_char(s,NULL,NULL);
1466         if ((num%n) != 0)
1467                 {
1468                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1469                 return(NULL);
1470                 }
1471         if ((skp == NULL) || (*skp == NULL))
1472                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1473         else
1474                 {
1475                 sk= *skp;
1476                 sk_SSL_CIPHER_zero(sk);
1477                 }
1478
1479         for (i=0; i<num; i+=n)
1480                 {
1481                 /* Check for SCSV */
1482                 if (s->s3 && (n != 3 || !p[0]) &&
1483                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1484                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1485                         {
1486                         /* SCSV fatal if renegotiating */
1487                         if (s->renegotiate)
1488                                 {
1489                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1490                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1491                                 goto err;
1492                                 }
1493                         s->s3->send_connection_binding = 1;
1494                         p += n;
1495 #ifdef OPENSSL_RI_DEBUG
1496                         fprintf(stderr, "SCSV received by server\n");
1497 #endif
1498                         continue;
1499                         }
1500
1501                 c=ssl_get_cipher_by_char(s,p);
1502                 p+=n;
1503                 if (c != NULL)
1504                         {
1505                         if (!sk_SSL_CIPHER_push(sk,c))
1506                                 {
1507                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1508                                 goto err;
1509                                 }
1510                         }
1511                 }
1512
1513         if (skp != NULL)
1514                 *skp=sk;
1515         return(sk);
1516 err:
1517         if ((skp == NULL) || (*skp == NULL))
1518                 sk_SSL_CIPHER_free(sk);
1519         return(NULL);
1520         }
1521
1522
1523 #ifndef OPENSSL_NO_TLSEXT
1524 /** return a servername extension value if provided in Client Hello, or NULL.
1525  * So far, only host_name types are defined (RFC 3546).
1526  */
1527
1528 const char *SSL_get_servername(const SSL *s, const int type)
1529         {
1530         if (type != TLSEXT_NAMETYPE_host_name)
1531                 return NULL;
1532
1533         return s->session && !s->tlsext_hostname ?
1534                 s->session->tlsext_hostname :
1535                 s->tlsext_hostname;
1536         }
1537
1538 int SSL_get_servername_type(const SSL *s)
1539         {
1540         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1541                 return TLSEXT_NAMETYPE_host_name;
1542         return -1;
1543         }
1544
1545 # ifndef OPENSSL_NO_NEXTPROTONEG
1546 /* SSL_select_next_proto implements the standard protocol selection. It is
1547  * expected that this function is called from the callback set by
1548  * SSL_CTX_set_next_proto_select_cb.
1549  *
1550  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1551  * strings. The length byte itself is not included in the length. A byte
1552  * string of length 0 is invalid. No byte string may be truncated.
1553  *
1554  * The current, but experimental algorithm for selecting the protocol is:
1555  *
1556  * 1) If the server doesn't support NPN then this is indicated to the
1557  * callback. In this case, the client application has to abort the connection
1558  * or have a default application level protocol.
1559  *
1560  * 2) If the server supports NPN, but advertises an empty list then the
1561  * client selects the first protcol in its list, but indicates via the
1562  * API that this fallback case was enacted.
1563  *
1564  * 3) Otherwise, the client finds the first protocol in the server's list
1565  * that it supports and selects this protocol. This is because it's
1566  * assumed that the server has better information about which protocol
1567  * a client should use.
1568  *
1569  * 4) If the client doesn't support any of the server's advertised
1570  * protocols, then this is treated the same as case 2.
1571  *
1572  * It returns either
1573  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1574  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1575  */
1576 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)
1577         {
1578         unsigned int i, j;
1579         const unsigned char *result;
1580         int status = OPENSSL_NPN_UNSUPPORTED;
1581
1582         /* For each protocol in server preference order, see if we support it. */
1583         for (i = 0; i < server_len; )
1584                 {
1585                 for (j = 0; j < client_len; )
1586                         {
1587                         if (server[i] == client[j] &&
1588                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1589                                 {
1590                                 /* We found a match */
1591                                 result = &server[i];
1592                                 status = OPENSSL_NPN_NEGOTIATED;
1593                                 goto found;
1594                                 }
1595                         j += client[j];
1596                         j++;
1597                         }
1598                 i += server[i];
1599                 i++;
1600                 }
1601
1602         /* There's no overlap between our protocols and the server's list. */
1603         result = client;
1604         status = OPENSSL_NPN_NO_OVERLAP;
1605
1606         found:
1607         *out = (unsigned char *) result + 1;
1608         *outlen = result[0];
1609         return status;
1610         }
1611
1612 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1613  * requested protocol for this connection and returns 0. If the client didn't
1614  * request any protocol, then *data is set to NULL.
1615  *
1616  * Note that the client can request any protocol it chooses. The value returned
1617  * from this function need not be a member of the list of supported protocols
1618  * provided by the callback.
1619  */
1620 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1621         {
1622         *data = s->next_proto_negotiated;
1623         if (!*data) {
1624                 *len = 0;
1625         } else {
1626                 *len = s->next_proto_negotiated_len;
1627         }
1628 }
1629
1630 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1631  * TLS server needs a list of supported protocols for Next Protocol
1632  * Negotiation. The returned list must be in wire format.  The list is returned
1633  * by setting |out| to point to it and |outlen| to its length. This memory will
1634  * not be modified, but one should assume that the SSL* keeps a reference to
1635  * it.
1636  *
1637  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1638  * such extension will be included in the ServerHello. */
1639 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)
1640         {
1641         ctx->next_protos_advertised_cb = cb;
1642         ctx->next_protos_advertised_cb_arg = arg;
1643         }
1644
1645 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1646  * client needs to select a protocol from the server's provided list. |out|
1647  * must be set to point to the selected protocol (which may be within |in|).
1648  * The length of the protocol name must be written into |outlen|. The server's
1649  * advertised protocols are provided in |in| and |inlen|. The callback can
1650  * assume that |in| is syntactically valid.
1651  *
1652  * The client must select a protocol. It is fatal to the connection if this
1653  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1654  */
1655 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)
1656         {
1657         ctx->next_proto_select_cb = cb;
1658         ctx->next_proto_select_cb_arg = arg;
1659         }
1660 # endif
1661 #endif
1662
1663 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1664         const char *label, size_t llen, const unsigned char *p, size_t plen,
1665         int use_context)
1666         {
1667         if (s->version < TLS1_VERSION)
1668                 return -1;
1669
1670         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1671                                                            llen, p, plen,
1672                                                            use_context);
1673         }
1674
1675 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1676         {
1677         unsigned long l;
1678
1679         l=(unsigned long)
1680                 ((unsigned int) a->session_id[0]     )|
1681                 ((unsigned int) a->session_id[1]<< 8L)|
1682                 ((unsigned long)a->session_id[2]<<16L)|
1683                 ((unsigned long)a->session_id[3]<<24L);
1684         return(l);
1685         }
1686
1687 /* NB: If this function (or indeed the hash function which uses a sort of
1688  * coarser function than this one) is changed, ensure
1689  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1690  * able to construct an SSL_SESSION that will collide with any existing session
1691  * with a matching session ID. */
1692 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1693         {
1694         if (a->ssl_version != b->ssl_version)
1695                 return(1);
1696         if (a->session_id_length != b->session_id_length)
1697                 return(1);
1698         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1699         }
1700
1701 /* These wrapper functions should remain rather than redeclaring
1702  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1703  * variable. The reason is that the functions aren't static, they're exposed via
1704  * ssl.h. */
1705 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1706 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1707
1708 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1709         {
1710         SSL_CTX *ret=NULL;
1711
1712         if (meth == NULL)
1713                 {
1714                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1715                 return(NULL);
1716                 }
1717
1718 #ifdef OPENSSL_FIPS
1719         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1720                 {
1721                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1722                 return NULL;
1723                 }
1724 #endif
1725
1726         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1727                 {
1728                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1729                 goto err;
1730                 }
1731         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1732         if (ret == NULL)
1733                 goto err;
1734
1735         memset(ret,0,sizeof(SSL_CTX));
1736
1737         ret->method=meth;
1738
1739         ret->cert_store=NULL;
1740         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1741         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1742         ret->session_cache_head=NULL;
1743         ret->session_cache_tail=NULL;
1744
1745         /* We take the system default */
1746         ret->session_timeout=meth->get_timeout();
1747
1748         ret->new_session_cb=0;
1749         ret->remove_session_cb=0;
1750         ret->get_session_cb=0;
1751         ret->generate_session_id=0;
1752
1753         memset((char *)&ret->stats,0,sizeof(ret->stats));
1754
1755         ret->references=1;
1756         ret->quiet_shutdown=0;
1757
1758 /*      ret->cipher=NULL;*/
1759 /*      ret->s2->challenge=NULL;
1760         ret->master_key=NULL;
1761         ret->key_arg=NULL;
1762         ret->s2->conn_id=NULL; */
1763
1764         ret->info_callback=NULL;
1765
1766         ret->app_verify_callback=0;
1767         ret->app_verify_arg=NULL;
1768
1769         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1770         ret->read_ahead=0;
1771         ret->msg_callback=0;
1772         ret->msg_callback_arg=NULL;
1773         ret->verify_mode=SSL_VERIFY_NONE;
1774 #if 0
1775         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1776 #endif
1777         ret->sid_ctx_length=0;
1778         ret->default_verify_callback=NULL;
1779         if ((ret->cert=ssl_cert_new()) == NULL)
1780                 goto err;
1781
1782         ret->default_passwd_callback=0;
1783         ret->default_passwd_callback_userdata=NULL;
1784         ret->client_cert_cb=0;
1785         ret->app_gen_cookie_cb=0;
1786         ret->app_verify_cookie_cb=0;
1787
1788         ret->sessions=lh_SSL_SESSION_new();
1789         if (ret->sessions == NULL) goto err;
1790         ret->cert_store=X509_STORE_new();
1791         if (ret->cert_store == NULL) goto err;
1792
1793         ssl_create_cipher_list(ret->method,
1794                 &ret->cipher_list,&ret->cipher_list_by_id,
1795                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1796         if (ret->cipher_list == NULL
1797             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1798                 {
1799                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1800                 goto err2;
1801                 }
1802
1803         ret->param = X509_VERIFY_PARAM_new();
1804         if (!ret->param)
1805                 goto err;
1806
1807         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1808                 {
1809                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1810                 goto err2;
1811                 }
1812         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1813                 {
1814                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1815                 goto err2;
1816                 }
1817         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1818                 {
1819                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1820                 goto err2;
1821                 }
1822
1823         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1824                 goto err;
1825
1826         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1827
1828         ret->extra_certs=NULL;
1829         ret->comp_methods=SSL_COMP_get_compression_methods();
1830
1831         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1832
1833 #ifndef OPENSSL_NO_TLSEXT
1834         ret->tlsext_servername_callback = 0;
1835         ret->tlsext_servername_arg = NULL;
1836         /* Setup RFC4507 ticket keys */
1837         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1838                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1839                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1840                 ret->options |= SSL_OP_NO_TICKET;
1841
1842         ret->tlsext_status_cb = 0;
1843         ret->tlsext_status_arg = NULL;
1844
1845 # ifndef OPENSSL_NO_NEXTPROTONEG
1846         ret->next_protos_advertised_cb = 0;
1847         ret->next_proto_select_cb = 0;
1848 # endif
1849 #endif
1850 #ifndef OPENSSL_NO_PSK
1851         ret->psk_identity_hint=NULL;
1852         ret->psk_client_callback=NULL;
1853         ret->psk_server_callback=NULL;
1854 #endif
1855 #ifndef OPENSSL_NO_SRP
1856         SSL_CTX_SRP_CTX_init(ret);
1857 #endif
1858 #ifndef OPENSSL_NO_BUF_FREELISTS
1859         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1860         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1861         if (!ret->rbuf_freelist)
1862                 goto err;
1863         ret->rbuf_freelist->chunklen = 0;
1864         ret->rbuf_freelist->len = 0;
1865         ret->rbuf_freelist->head = NULL;
1866         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1867         if (!ret->wbuf_freelist)
1868                 {
1869                 OPENSSL_free(ret->rbuf_freelist);
1870                 goto err;
1871                 }
1872         ret->wbuf_freelist->chunklen = 0;
1873         ret->wbuf_freelist->len = 0;
1874         ret->wbuf_freelist->head = NULL;
1875 #endif
1876 #ifndef OPENSSL_NO_ENGINE
1877         ret->client_cert_engine = NULL;
1878 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1879 #define eng_strx(x)     #x
1880 #define eng_str(x)      eng_strx(x)
1881         /* Use specific client engine automatically... ignore errors */
1882         {
1883         ENGINE *eng;
1884         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1885         if (!eng)
1886                 {
1887                 ERR_clear_error();
1888                 ENGINE_load_builtin_engines();
1889                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1890                 }
1891         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1892                 ERR_clear_error();
1893         }
1894 #endif
1895 #endif
1896         /* Default is to connect to non-RI servers. When RI is more widely
1897          * deployed might change this.
1898          */
1899         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1900
1901         return(ret);
1902 err:
1903         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1904 err2:
1905         if (ret != NULL) SSL_CTX_free(ret);
1906         return(NULL);
1907         }
1908
1909 #if 0
1910 static void SSL_COMP_free(SSL_COMP *comp)
1911     { OPENSSL_free(comp); }
1912 #endif
1913
1914 #ifndef OPENSSL_NO_BUF_FREELISTS
1915 static void
1916 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1917         {
1918         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1919         for (ent = list->head; ent; ent = next)
1920                 {
1921                 next = ent->next;
1922                 OPENSSL_free(ent);
1923                 }
1924         OPENSSL_free(list);
1925         }
1926 #endif
1927
1928 void SSL_CTX_free(SSL_CTX *a)
1929         {
1930         int i;
1931
1932         if (a == NULL) return;
1933
1934         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1935 #ifdef REF_PRINT
1936         REF_PRINT("SSL_CTX",a);
1937 #endif
1938         if (i > 0) return;
1939 #ifdef REF_CHECK
1940         if (i < 0)
1941                 {
1942                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1943                 abort(); /* ok */
1944                 }
1945 #endif
1946
1947         if (a->param)
1948                 X509_VERIFY_PARAM_free(a->param);
1949
1950         /*
1951          * Free internal session cache. However: the remove_cb() may reference
1952          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1953          * after the sessions were flushed.
1954          * As the ex_data handling routines might also touch the session cache,
1955          * the most secure solution seems to be: empty (flush) the cache, then
1956          * free ex_data, then finally free the cache.
1957          * (See ticket [openssl.org #212].)
1958          */
1959         if (a->sessions != NULL)
1960                 SSL_CTX_flush_sessions(a,0);
1961
1962         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1963
1964         if (a->sessions != NULL)
1965                 lh_SSL_SESSION_free(a->sessions);
1966
1967         if (a->cert_store != NULL)
1968                 X509_STORE_free(a->cert_store);
1969         if (a->cipher_list != NULL)
1970                 sk_SSL_CIPHER_free(a->cipher_list);
1971         if (a->cipher_list_by_id != NULL)
1972                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1973         if (a->cert != NULL)
1974                 ssl_cert_free(a->cert);
1975         if (a->client_CA != NULL)
1976                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1977         if (a->extra_certs != NULL)
1978                 sk_X509_pop_free(a->extra_certs,X509_free);
1979 #if 0 /* This should never be done, since it removes a global database */
1980         if (a->comp_methods != NULL)
1981                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1982 #else
1983         a->comp_methods = NULL;
1984 #endif
1985
1986 #ifndef OPENSSL_NO_SRTP
1987         if (a->srtp_profiles)
1988                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1989 #endif
1990
1991 #ifndef OPENSSL_NO_PSK
1992         if (a->psk_identity_hint)
1993                 OPENSSL_free(a->psk_identity_hint);
1994 #endif
1995 #ifndef OPENSSL_NO_SRP
1996         SSL_CTX_SRP_CTX_free(a);
1997 #endif
1998 #ifndef OPENSSL_NO_ENGINE
1999         if (a->client_cert_engine)
2000                 ENGINE_finish(a->client_cert_engine);
2001 #endif
2002
2003 #ifndef OPENSSL_NO_BUF_FREELISTS
2004         if (a->wbuf_freelist)
2005                 ssl_buf_freelist_free(a->wbuf_freelist);
2006         if (a->rbuf_freelist)
2007                 ssl_buf_freelist_free(a->rbuf_freelist);
2008 #endif
2009
2010 #ifndef OPENSSL_NO_TLSEXT
2011         if (a->tlsext_channel_id_private)
2012                 EVP_PKEY_free(a->tlsext_channel_id_private);
2013 #endif
2014
2015         OPENSSL_free(a);
2016         }
2017
2018 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2019         {
2020         ctx->default_passwd_callback=cb;
2021         }
2022
2023 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2024         {
2025         ctx->default_passwd_callback_userdata=u;
2026         }
2027
2028 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2029         {
2030         ctx->app_verify_callback=cb;
2031         ctx->app_verify_arg=arg;
2032         }
2033
2034 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2035         {
2036         ctx->verify_mode=mode;
2037         ctx->default_verify_callback=cb;
2038         }
2039
2040 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2041         {
2042         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2043         }
2044
2045 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2046         {
2047         CERT_PKEY *cpk;
2048         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2049         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2050         int rsa_tmp_export,dh_tmp_export,kl;
2051         unsigned long mask_k,mask_a,emask_k,emask_a;
2052         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2053 #ifndef OPENSSL_NO_ECDH
2054         int have_ecdh_tmp;
2055 #endif
2056         X509 *x = NULL;
2057         EVP_PKEY *ecc_pkey = NULL;
2058         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2059
2060         if (c == NULL) return;
2061
2062         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2063
2064 #ifndef OPENSSL_NO_RSA
2065         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2066         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2067                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2068 #else
2069         rsa_tmp=rsa_tmp_export=0;
2070 #endif
2071 #ifndef OPENSSL_NO_DH
2072         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2073         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2074                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2075 #else
2076         dh_tmp=dh_tmp_export=0;
2077 #endif
2078
2079 #ifndef OPENSSL_NO_ECDH
2080         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2081 #endif
2082         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2083         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2084         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2085         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2086         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2087         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2088         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2089         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2090         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2091         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2092         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2093 /* FIX THIS EAY EAY EAY */
2094         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2095         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2096         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2097         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2098         mask_k=0;
2099         mask_a=0;
2100         emask_k=0;
2101         emask_a=0;
2102
2103
2104
2105 #ifdef CIPHER_DEBUG
2106         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2107                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2108                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2109 #endif
2110
2111         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2112         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2113                 mask_k |= SSL_kGOST;
2114                 mask_a |= SSL_aGOST01;
2115         }
2116         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2117         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2118                 mask_k |= SSL_kGOST;
2119                 mask_a |= SSL_aGOST94;
2120         }
2121
2122         if (rsa_enc || (rsa_tmp && rsa_sign))
2123                 mask_k|=SSL_kRSA;
2124         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2125                 emask_k|=SSL_kRSA;
2126
2127 #if 0
2128         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2129         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2130                 (rsa_enc || rsa_sign || dsa_sign))
2131                 mask_k|=SSL_kEDH;
2132         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2133                 (rsa_enc || rsa_sign || dsa_sign))
2134                 emask_k|=SSL_kEDH;
2135 #endif
2136
2137         if (dh_tmp_export)
2138                 emask_k|=SSL_kEDH;
2139
2140         if (dh_tmp)
2141                 mask_k|=SSL_kEDH;
2142
2143         if (dh_rsa) mask_k|=SSL_kDHr;
2144         if (dh_rsa_export) emask_k|=SSL_kDHr;
2145
2146         if (dh_dsa) mask_k|=SSL_kDHd;
2147         if (dh_dsa_export) emask_k|=SSL_kDHd;
2148
2149         if (rsa_enc || rsa_sign)
2150                 {
2151                 mask_a|=SSL_aRSA;
2152                 emask_a|=SSL_aRSA;
2153                 }
2154
2155         if (dsa_sign)
2156                 {
2157                 mask_a|=SSL_aDSS;
2158                 emask_a|=SSL_aDSS;
2159                 }
2160
2161         mask_a|=SSL_aNULL;
2162         emask_a|=SSL_aNULL;
2163
2164 #ifndef OPENSSL_NO_KRB5
2165         mask_k|=SSL_kKRB5;
2166         mask_a|=SSL_aKRB5;
2167         emask_k|=SSL_kKRB5;
2168         emask_a|=SSL_aKRB5;
2169 #endif
2170
2171         /* An ECC certificate may be usable for ECDH and/or
2172          * ECDSA cipher suites depending on the key usage extension.
2173          */
2174         if (have_ecc_cert)
2175                 {
2176                 /* This call populates extension flags (ex_flags) */
2177                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2178                 X509_check_purpose(x, -1, 0);
2179                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2180                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2181                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2182                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2183                 ecc_pkey = X509_get_pubkey(x);
2184                 ecc_pkey_size = (ecc_pkey != NULL) ?
2185                     EVP_PKEY_bits(ecc_pkey) : 0;
2186                 EVP_PKEY_free(ecc_pkey);
2187                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2188                         {
2189                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2190                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2191                         }
2192 #ifndef OPENSSL_NO_ECDH
2193                 if (ecdh_ok)
2194                         {
2195
2196                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2197                                 {
2198                                 mask_k|=SSL_kECDHr;
2199                                 mask_a|=SSL_aECDH;
2200                                 if (ecc_pkey_size <= 163)
2201                                         {
2202                                         emask_k|=SSL_kECDHr;
2203                                         emask_a|=SSL_aECDH;
2204                                         }
2205                                 }
2206
2207                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2208                                 {
2209                                 mask_k|=SSL_kECDHe;
2210                                 mask_a|=SSL_aECDH;
2211                                 if (ecc_pkey_size <= 163)
2212                                         {
2213                                         emask_k|=SSL_kECDHe;
2214                                         emask_a|=SSL_aECDH;
2215                                         }
2216                                 }
2217                         }
2218 #endif
2219 #ifndef OPENSSL_NO_ECDSA
2220                 if (ecdsa_ok)
2221                         {
2222                         mask_a|=SSL_aECDSA;
2223                         emask_a|=SSL_aECDSA;
2224                         }
2225 #endif
2226                 }
2227
2228 #ifndef OPENSSL_NO_ECDH
2229         if (have_ecdh_tmp)
2230                 {
2231                 mask_k|=SSL_kEECDH;
2232                 emask_k|=SSL_kEECDH;
2233                 }
2234 #endif
2235
2236 #ifndef OPENSSL_NO_PSK
2237         mask_k |= SSL_kPSK;
2238         mask_a |= SSL_aPSK;
2239         emask_k |= SSL_kPSK;
2240         emask_a |= SSL_aPSK;
2241 #endif
2242
2243         c->mask_k=mask_k;
2244         c->mask_a=mask_a;
2245         c->export_mask_k=emask_k;
2246         c->export_mask_a=emask_a;
2247         c->valid=1;
2248         }
2249
2250 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2251 #define ku_reject(x, usage) \
2252         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2253
2254 #ifndef OPENSSL_NO_EC
2255
2256 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2257         {
2258         unsigned long alg_k, alg_a;
2259         EVP_PKEY *pkey = NULL;
2260         int keysize = 0;
2261         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2262         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2263
2264         alg_k = cs->algorithm_mkey;
2265         alg_a = cs->algorithm_auth;
2266
2267         if (SSL_C_IS_EXPORT(cs))
2268                 {
2269                 /* ECDH key length in export ciphers must be <= 163 bits */
2270                 pkey = X509_get_pubkey(x);
2271                 if (pkey == NULL) return 0;
2272                 keysize = EVP_PKEY_bits(pkey);
2273                 EVP_PKEY_free(pkey);
2274                 if (keysize > 163) return 0;
2275                 }
2276
2277         /* This call populates the ex_flags field correctly */
2278         X509_check_purpose(x, -1, 0);
2279         if ((x->sig_alg) && (x->sig_alg->algorithm))
2280                 {
2281                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2282                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2283                 }
2284         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2285                 {
2286                 /* key usage, if present, must allow key agreement */
2287                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2288                         {
2289                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2290                         return 0;
2291                         }
2292                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2293                         {
2294                         /* signature alg must be ECDSA */
2295                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2296                                 {
2297                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2298                                 return 0;
2299                                 }
2300                         }
2301                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2302                         {
2303                         /* signature alg must be RSA */
2304
2305                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2306                                 {
2307                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2308                                 return 0;
2309                                 }
2310                         }
2311                 }
2312         if (alg_a & SSL_aECDSA)
2313                 {
2314                 /* key usage, if present, must allow signing */
2315                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2316                         {
2317                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2318                         return 0;
2319                         }
2320                 }
2321
2322         return 1;  /* all checks are ok */
2323         }
2324
2325 #endif
2326
2327 /* THIS NEEDS CLEANING UP */
2328 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2329         {
2330         unsigned long alg_k,alg_a;
2331         CERT *c;
2332         int i;
2333
2334         c=s->cert;
2335         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2336
2337         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2338         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2339
2340         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2341                 {
2342                 /* we don't need to look at SSL_kEECDH
2343                  * since no certificate is needed for
2344                  * anon ECDH and for authenticated
2345                  * EECDH, the check for the auth
2346                  * algorithm will set i correctly
2347                  * NOTE: For ECDH-RSA, we need an ECC
2348                  * not an RSA cert but for EECDH-RSA
2349                  * we need an RSA cert. Placing the
2350                  * checks for SSL_kECDH before RSA
2351                  * checks ensures the correct cert is chosen.
2352                  */
2353                 i=SSL_PKEY_ECC;
2354                 }
2355         else if (alg_a & SSL_aECDSA)
2356                 {
2357                 i=SSL_PKEY_ECC;
2358                 }
2359         else if (alg_k & SSL_kDHr)
2360                 i=SSL_PKEY_DH_RSA;
2361         else if (alg_k & SSL_kDHd)
2362                 i=SSL_PKEY_DH_DSA;
2363         else if (alg_a & SSL_aDSS)
2364                 i=SSL_PKEY_DSA_SIGN;
2365         else if (alg_a & SSL_aRSA)
2366                 {
2367                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2368                         i=SSL_PKEY_RSA_SIGN;
2369                 else
2370                         i=SSL_PKEY_RSA_ENC;
2371                 }
2372         else if (alg_a & SSL_aKRB5)
2373                 {
2374                 /* VRS something else here? */
2375                 return(NULL);
2376                 }
2377         else if (alg_a & SSL_aGOST94)
2378                 i=SSL_PKEY_GOST94;
2379         else if (alg_a & SSL_aGOST01)
2380                 i=SSL_PKEY_GOST01;
2381         else /* if (alg_a & SSL_aNULL) */
2382                 {
2383                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2384                 return(NULL);
2385                 }
2386
2387         return c->pkeys + i;
2388         }
2389
2390 X509 *ssl_get_server_send_cert(const SSL *s)
2391         {
2392         CERT_PKEY *cpk;
2393         cpk = ssl_get_server_send_pkey(s);
2394         if (!cpk)
2395                 return NULL;
2396         return cpk->x509;
2397         }
2398
2399 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2400         {
2401         unsigned long alg_a;
2402         CERT *c;
2403         int idx = -1;
2404
2405         alg_a = cipher->algorithm_auth;
2406         c=s->cert;
2407
2408         if ((alg_a & SSL_aDSS) &&
2409                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2410                 idx = SSL_PKEY_DSA_SIGN;
2411         else if (alg_a & SSL_aRSA)
2412                 {
2413                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2414                         idx = SSL_PKEY_RSA_SIGN;
2415                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2416                         idx = SSL_PKEY_RSA_ENC;
2417                 }
2418         else if ((alg_a & SSL_aECDSA) &&
2419                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2420                 idx = SSL_PKEY_ECC;
2421         if (idx == -1)
2422                 {
2423                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2424                 return(NULL);
2425                 }
2426         if (pmd)
2427                 *pmd = c->pkeys[idx].digest;
2428         return c->pkeys[idx].privatekey;
2429         }
2430
2431 void ssl_update_cache(SSL *s,int mode)
2432         {
2433         int i;
2434
2435         /* If the session_id_length is 0, we are not supposed to cache it,
2436          * and it would be rather hard to do anyway :-) */
2437         if (s->session->session_id_length == 0) return;
2438
2439         i=s->session_ctx->session_cache_mode;
2440         if ((i & mode) && (!s->hit)
2441                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2442                     || SSL_CTX_add_session(s->session_ctx,s->session))
2443                 && (s->session_ctx->new_session_cb != NULL))
2444                 {
2445                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2446                 if (!s->session_ctx->new_session_cb(s,s->session))
2447                         SSL_SESSION_free(s->session);
2448                 }
2449
2450         /* auto flush every 255 connections */
2451         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2452                 ((i & mode) == mode))
2453                 {
2454                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2455                         ?s->session_ctx->stats.sess_connect_good
2456                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2457                         {
2458                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2459                         }
2460                 }
2461         }
2462
2463 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2464         {
2465         return(s->method);
2466         }
2467
2468 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2469         {
2470         int conn= -1;
2471         int ret=1;
2472
2473         if (s->method != meth)
2474                 {
2475                 if (s->handshake_func != NULL)
2476                         conn=(s->handshake_func == s->method->ssl_connect);
2477
2478                 if (s->method->version == meth->version)
2479                         s->method=meth;
2480                 else
2481                         {
2482                         s->method->ssl_free(s);
2483                         s->method=meth;
2484                         ret=s->method->ssl_new(s);
2485                         }
2486
2487                 if (conn == 1)
2488                         s->handshake_func=meth->ssl_connect;
2489                 else if (conn == 0)
2490                         s->handshake_func=meth->ssl_accept;
2491                 }
2492         return(ret);
2493         }
2494
2495 int SSL_get_error(const SSL *s,int i)
2496         {
2497         int reason;
2498         unsigned long l;
2499         BIO *bio;
2500
2501         if (i > 0) return(SSL_ERROR_NONE);
2502
2503         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2504          * etc, where we do encode the error */
2505         if ((l=ERR_peek_error()) != 0)
2506                 {
2507                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2508                         return(SSL_ERROR_SYSCALL);
2509                 else
2510                         return(SSL_ERROR_SSL);
2511                 }
2512
2513         if ((i < 0) && SSL_want_read(s))
2514                 {
2515                 bio=SSL_get_rbio(s);
2516                 if (BIO_should_read(bio))
2517                         return(SSL_ERROR_WANT_READ);
2518                 else if (BIO_should_write(bio))
2519                         /* This one doesn't make too much sense ... We never try
2520                          * to write to the rbio, and an application program where
2521                          * rbio and wbio are separate couldn't even know what it
2522                          * should wait for.
2523                          * However if we ever set s->rwstate incorrectly
2524                          * (so that we have SSL_want_read(s) instead of
2525                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2526                          * this test works around that bug; so it might be safer
2527                          * to keep it. */
2528                         return(SSL_ERROR_WANT_WRITE);
2529                 else if (BIO_should_io_special(bio))
2530                         {
2531                         reason=BIO_get_retry_reason(bio);
2532                         if (reason == BIO_RR_CONNECT)
2533                                 return(SSL_ERROR_WANT_CONNECT);
2534                         else if (reason == BIO_RR_ACCEPT)
2535                                 return(SSL_ERROR_WANT_ACCEPT);
2536                         else
2537                                 return(SSL_ERROR_SYSCALL); /* unknown */
2538                         }
2539                 }
2540
2541         if ((i < 0) && SSL_want_write(s))
2542                 {
2543                 bio=SSL_get_wbio(s);
2544                 if (BIO_should_write(bio))
2545                         return(SSL_ERROR_WANT_WRITE);
2546                 else if (BIO_should_read(bio))
2547                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2548                         return(SSL_ERROR_WANT_READ);
2549                 else if (BIO_should_io_special(bio))
2550                         {
2551                         reason=BIO_get_retry_reason(bio);
2552                         if (reason == BIO_RR_CONNECT)
2553                                 return(SSL_ERROR_WANT_CONNECT);
2554                         else if (reason == BIO_RR_ACCEPT)
2555                                 return(SSL_ERROR_WANT_ACCEPT);
2556                         else
2557                                 return(SSL_ERROR_SYSCALL);
2558                         }
2559                 }
2560         if ((i < 0) && SSL_want_x509_lookup(s))
2561                 {
2562                 return(SSL_ERROR_WANT_X509_LOOKUP);
2563                 }
2564         if ((i < 0) && SSL_want_channel_id_lookup(s))
2565                 {
2566                 return(SSL_ERROR_WANT_CHANNEL_ID_LOOKUP);
2567                 }
2568
2569         if (i == 0)
2570                 {
2571                 if (s->version == SSL2_VERSION)
2572                         {
2573                         /* assume it is the socket being closed */
2574                         return(SSL_ERROR_ZERO_RETURN);
2575                         }
2576                 else
2577                         {
2578                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2579                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2580                                 return(SSL_ERROR_ZERO_RETURN);
2581                         }
2582                 }
2583         return(SSL_ERROR_SYSCALL);
2584         }
2585
2586 int SSL_do_handshake(SSL *s)
2587         {
2588         int ret=1;
2589
2590         if (s->handshake_func == NULL)
2591                 {
2592                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2593                 return(-1);
2594                 }
2595
2596         s->method->ssl_renegotiate_check(s);
2597
2598         if (SSL_in_init(s) || SSL_in_before(s))
2599                 {
2600                 ret=s->handshake_func(s);
2601                 }
2602         return(ret);
2603         }
2604
2605 /* For the next 2 functions, SSL_clear() sets shutdown and so
2606  * one of these calls will reset it */
2607 void SSL_set_accept_state(SSL *s)
2608         {
2609         s->server=1;
2610         s->shutdown=0;
2611         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2612         s->handshake_func=s->method->ssl_accept;
2613         /* clear the current cipher */
2614         ssl_clear_cipher_ctx(s);
2615         ssl_clear_hash_ctx(&s->read_hash);
2616         ssl_clear_hash_ctx(&s->write_hash);
2617         }
2618
2619 void SSL_set_connect_state(SSL *s)
2620         {
2621         s->server=0;
2622         s->shutdown=0;
2623         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2624         s->handshake_func=s->method->ssl_connect;
2625         /* clear the current cipher */
2626         ssl_clear_cipher_ctx(s);
2627         ssl_clear_hash_ctx(&s->read_hash);
2628         ssl_clear_hash_ctx(&s->write_hash);
2629         }
2630
2631 int ssl_undefined_function(SSL *s)
2632         {
2633         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2634         return(0);
2635         }
2636
2637 int ssl_undefined_void_function(void)
2638         {
2639         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2640         return(0);
2641         }
2642
2643 int ssl_undefined_const_function(const SSL *s)
2644         {
2645         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2646         return(0);
2647         }
2648
2649 SSL_METHOD *ssl_bad_method(int ver)
2650         {
2651         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2652         return(NULL);
2653         }
2654
2655 static const char *ssl_get_version(int version)
2656         {
2657         if (version == TLS1_2_VERSION)
2658                 return("TLSv1.2");
2659         else if (version == TLS1_1_VERSION)
2660                 return("TLSv1.1");
2661         else if (version == TLS1_VERSION)
2662                 return("TLSv1");
2663         else if (version == SSL3_VERSION)
2664                 return("SSLv3");
2665         else if (version == SSL2_VERSION)
2666                 return("SSLv2");
2667         else
2668                 return("unknown");
2669         }
2670
2671 const char *SSL_get_version(const SSL *s)
2672         {
2673                 return ssl_get_version(s->version);
2674         }
2675
2676 const char *SSL_SESSION_get_version(const SSL_SESSION *s)
2677         {
2678                 return ssl_get_version(s->ssl_version);
2679         }
2680
2681 const char* SSL_authentication_method(const SSL* ssl)
2682         {
2683         if (ssl->cert != NULL && ssl->cert->rsa_tmp != NULL)
2684                 return SSL_TXT_RSA "_" SSL_TXT_EXPORT;
2685         switch (ssl->version)
2686                 {
2687         case SSL2_VERSION:
2688                 return SSL_TXT_RSA;
2689         default:
2690                 return SSL_CIPHER_authentication_method(ssl->s3->tmp.new_cipher);
2691                 }
2692         }
2693
2694 SSL *SSL_dup(SSL *s)
2695         {
2696         STACK_OF(X509_NAME) *sk;
2697         X509_NAME *xn;
2698         SSL *ret;
2699         int i;
2700
2701         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2702             return(NULL);
2703
2704         ret->version = s->version;
2705         ret->type = s->type;
2706         ret->method = s->method;
2707
2708         if (s->session != NULL)
2709                 {
2710                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2711                 SSL_copy_session_id(ret,s);
2712                 }
2713         else
2714                 {
2715                 /* No session has been established yet, so we have to expect
2716                  * that s->cert or ret->cert will be changed later --
2717                  * they should not both point to the same object,
2718                  * and thus we can't use SSL_copy_session_id. */
2719
2720                 ret->method->ssl_free(ret);
2721                 ret->method = s->method;
2722                 ret->method->ssl_new(ret);
2723
2724                 if (s->cert != NULL)
2725                         {
2726                         if (ret->cert != NULL)
2727                                 {
2728                                 ssl_cert_free(ret->cert);
2729                                 }
2730                         ret->cert = ssl_cert_dup(s->cert);
2731                         if (ret->cert == NULL)
2732                                 goto err;
2733                         }
2734
2735                 SSL_set_session_id_context(ret,
2736                         s->sid_ctx, s->sid_ctx_length);
2737                 }
2738
2739         ret->options=s->options;
2740         ret->mode=s->mode;
2741         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2742         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2743         ret->msg_callback = s->msg_callback;
2744         ret->msg_callback_arg = s->msg_callback_arg;
2745         SSL_set_verify(ret,SSL_get_verify_mode(s),
2746                 SSL_get_verify_callback(s));
2747         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2748         ret->generate_session_id = s->generate_session_id;
2749
2750         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2751
2752         ret->debug=s->debug;
2753
2754         /* copy app data, a little dangerous perhaps */
2755         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2756                 goto err;
2757
2758         /* setup rbio, and wbio */
2759         if (s->rbio != NULL)
2760                 {
2761                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2762                         goto err;
2763                 }
2764         if (s->wbio != NULL)
2765                 {
2766                 if (s->wbio != s->rbio)
2767                         {
2768                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2769                                 goto err;
2770                         }
2771                 else
2772                         ret->wbio=ret->rbio;
2773                 }
2774         ret->rwstate = s->rwstate;
2775         ret->in_handshake = s->in_handshake;
2776         ret->handshake_func = s->handshake_func;
2777         ret->server = s->server;
2778         ret->renegotiate = s->renegotiate;
2779         ret->new_session = s->new_session;
2780         ret->quiet_shutdown = s->quiet_shutdown;
2781         ret->shutdown=s->shutdown;
2782         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2783         ret->rstate=s->rstate;
2784         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2785         ret->hit=s->hit;
2786
2787         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2788
2789         /* dup the cipher_list and cipher_list_by_id stacks */
2790         if (s->cipher_list != NULL)
2791                 {
2792                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2793                         goto err;
2794                 }
2795         if (s->cipher_list_by_id != NULL)
2796                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2797                         == NULL)
2798                         goto err;
2799
2800         /* Dup the client_CA list */
2801         if (s->client_CA != NULL)
2802                 {
2803                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2804                 ret->client_CA=sk;
2805                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2806                         {
2807                         xn=sk_X509_NAME_value(sk,i);
2808                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2809                                 {
2810                                 X509_NAME_free(xn);
2811                                 goto err;
2812                                 }
2813                         }
2814                 }
2815
2816         if (0)
2817                 {
2818 err:
2819                 if (ret != NULL) SSL_free(ret);
2820                 ret=NULL;
2821                 }
2822         return(ret);
2823         }
2824
2825 void ssl_clear_cipher_ctx(SSL *s)
2826         {
2827         if (s->enc_read_ctx != NULL)
2828                 {
2829                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2830                 OPENSSL_free(s->enc_read_ctx);
2831                 s->enc_read_ctx=NULL;
2832                 }
2833         if (s->enc_write_ctx != NULL)
2834                 {
2835                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2836                 OPENSSL_free(s->enc_write_ctx);
2837                 s->enc_write_ctx=NULL;
2838                 }
2839         if (s->aead_read_ctx != NULL)
2840                 {
2841                 EVP_AEAD_CTX_cleanup(&s->aead_read_ctx->ctx);
2842                 OPENSSL_free(s->aead_read_ctx);
2843                 s->aead_read_ctx = NULL;
2844                 }
2845         if (s->aead_write_ctx != NULL)
2846                 {
2847                 EVP_AEAD_CTX_cleanup(&s->aead_write_ctx->ctx);
2848                 OPENSSL_free(s->aead_write_ctx);
2849                 s->aead_write_ctx = NULL;
2850                 }
2851 #ifndef OPENSSL_NO_COMP
2852         if (s->expand != NULL)
2853                 {
2854                 COMP_CTX_free(s->expand);
2855                 s->expand=NULL;
2856                 }
2857         if (s->compress != NULL)
2858                 {
2859                 COMP_CTX_free(s->compress);
2860                 s->compress=NULL;
2861                 }
2862 #endif
2863         }
2864
2865 /* Fix this function so that it takes an optional type parameter */
2866 X509 *SSL_get_certificate(const SSL *s)
2867         {
2868         if (s->server)
2869                 return(ssl_get_server_send_cert(s));
2870         else if (s->cert != NULL)
2871                 return(s->cert->key->x509);
2872         else
2873                 return(NULL);
2874         }
2875
2876 /* Fix this function so that it takes an optional type parameter */
2877 EVP_PKEY *SSL_get_privatekey(SSL *s)
2878         {
2879         if (s->cert != NULL)
2880                 return(s->cert->key->privatekey);
2881         else
2882                 return(NULL);
2883         }
2884
2885 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2886         {
2887         if ((s->session != NULL) && (s->session->cipher != NULL))
2888                 return(s->session->cipher);
2889         return(NULL);
2890         }
2891 #ifdef OPENSSL_NO_COMP
2892 const void *SSL_get_current_compression(SSL *s)
2893         {
2894         return NULL;
2895         }
2896 const void *SSL_get_current_expansion(SSL *s)
2897         {
2898         return NULL;
2899         }
2900 #else
2901
2902 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2903         {
2904         if (s->compress != NULL)
2905                 return(s->compress->meth);
2906         return(NULL);
2907         }
2908
2909 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2910         {
2911         if (s->expand != NULL)
2912                 return(s->expand->meth);
2913         return(NULL);
2914         }
2915 #endif
2916
2917 int ssl_init_wbio_buffer(SSL *s,int push)
2918         {
2919         BIO *bbio;
2920
2921         if (s->bbio == NULL)
2922                 {
2923                 bbio=BIO_new(BIO_f_buffer());
2924                 if (bbio == NULL) return(0);
2925                 s->bbio=bbio;
2926                 }
2927         else
2928                 {
2929                 bbio=s->bbio;
2930                 if (s->bbio == s->wbio)
2931                         s->wbio=BIO_pop(s->wbio);
2932                 }
2933         (void)BIO_reset(bbio);
2934 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2935         if (!BIO_set_read_buffer_size(bbio,1))
2936                 {
2937                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2938                 return(0);
2939                 }
2940         if (push)
2941                 {
2942                 if (s->wbio != bbio)
2943                         s->wbio=BIO_push(bbio,s->wbio);
2944                 }
2945         else
2946                 {
2947                 if (s->wbio == bbio)
2948                         s->wbio=BIO_pop(bbio);
2949                 }
2950         return(1);
2951         }
2952
2953 void ssl_free_wbio_buffer(SSL *s)
2954         {
2955         if (s->bbio == NULL) return;
2956
2957         if (s->bbio == s->wbio)
2958                 {
2959                 /* remove buffering */
2960                 s->wbio=BIO_pop(s->wbio);
2961 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2962                 assert(s->wbio != NULL);
2963 #endif
2964         }
2965         BIO_free(s->bbio);
2966         s->bbio=NULL;
2967         }
2968
2969 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2970         {
2971         ctx->quiet_shutdown=mode;
2972         }
2973
2974 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2975         {
2976         return(ctx->quiet_shutdown);
2977         }
2978
2979 void SSL_set_quiet_shutdown(SSL *s,int mode)
2980         {
2981         s->quiet_shutdown=mode;
2982         }
2983
2984 int SSL_get_quiet_shutdown(const SSL *s)
2985         {
2986         return(s->quiet_shutdown);
2987         }
2988
2989 void SSL_set_shutdown(SSL *s,int mode)
2990         {
2991         s->shutdown=mode;
2992         }
2993
2994 int SSL_get_shutdown(const SSL *s)
2995         {
2996         return(s->shutdown);
2997         }
2998
2999 int SSL_version(const SSL *s)
3000         {
3001         return(s->version);
3002         }
3003
3004 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3005         {
3006         return(ssl->ctx);
3007         }
3008
3009 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3010         {
3011         if (ssl->ctx == ctx)
3012                 return ssl->ctx;
3013 #ifndef OPENSSL_NO_TLSEXT
3014         if (ctx == NULL)
3015                 ctx = ssl->initial_ctx;
3016 #endif
3017         if (ssl->cert != NULL)
3018                 ssl_cert_free(ssl->cert);
3019         ssl->cert = ssl_cert_dup(ctx->cert);
3020         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3021         if (ssl->ctx != NULL)
3022                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3023         ssl->ctx = ctx;
3024         return(ssl->ctx);
3025         }
3026
3027 #ifndef OPENSSL_NO_STDIO
3028 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3029         {
3030         return(X509_STORE_set_default_paths(ctx->cert_store));
3031         }
3032
3033 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3034                 const char *CApath)
3035         {
3036         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3037         }
3038 #endif
3039
3040 void SSL_set_info_callback(SSL *ssl,
3041         void (*cb)(const SSL *ssl,int type,int val))
3042         {
3043         ssl->info_callback=cb;
3044         }
3045
3046 /* One compiler (Diab DCC) doesn't like argument names in returned
3047    function pointer.  */
3048 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3049         {
3050         return ssl->info_callback;
3051         }
3052
3053 int SSL_state(const SSL *ssl)
3054         {
3055         return(ssl->state);
3056         }
3057
3058 void SSL_set_state(SSL *ssl, int state)
3059         {
3060         ssl->state = state;
3061         }
3062
3063 void SSL_set_verify_result(SSL *ssl,long arg)
3064         {
3065         ssl->verify_result=arg;
3066         }
3067
3068 long SSL_get_verify_result(const SSL *ssl)
3069         {
3070         return(ssl->verify_result);
3071         }
3072
3073 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3074                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3075         {
3076         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3077                                 new_func, dup_func, free_func);
3078         }
3079
3080 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3081         {
3082         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3083         }
3084
3085 void *SSL_get_ex_data(const SSL *s,int idx)
3086         {
3087         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3088         }
3089
3090 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3091                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3092         {
3093         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3094                                 new_func, dup_func, free_func);
3095         }
3096
3097 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3098         {
3099         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3100         }
3101
3102 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3103         {
3104         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3105         }
3106
3107 int ssl_ok(SSL *s)
3108         {
3109         return(1);
3110         }
3111
3112 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3113         {
3114         return(ctx->cert_store);
3115         }
3116
3117 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3118         {
3119         if (ctx->cert_store != NULL)
3120                 X509_STORE_free(ctx->cert_store);
3121         ctx->cert_store=store;
3122         }
3123
3124 int SSL_want(const SSL *s)
3125         {
3126         return(s->rwstate);
3127         }
3128
3129 /*!
3130  * \brief Set the callback for generating temporary RSA keys.
3131  * \param ctx the SSL context.
3132  * \param cb the callback
3133  */
3134
3135 #ifndef OPENSSL_NO_RSA
3136 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3137                                                           int is_export,
3138                                                           int keylength))
3139     {
3140     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3141     }
3142
3143 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3144                                                   int is_export,
3145                                                   int keylength))
3146     {
3147     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3148     }
3149 #endif
3150
3151 #ifdef DOXYGEN
3152 /*!
3153  * \brief The RSA temporary key callback function.
3154  * \param ssl the SSL session.
3155  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3156  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3157  * of the required key in bits.
3158  * \return the temporary RSA key.
3159  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3160  */
3161
3162 RSA *cb(SSL *ssl,int is_export,int keylength)
3163     {}
3164 #endif
3165
3166 /*!
3167  * \brief Set the callback for generating temporary DH keys.
3168  * \param ctx the SSL context.
3169  * \param dh the callback
3170  */
3171
3172 #ifndef OPENSSL_NO_DH
3173 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3174                                                         int keylength))
3175         {
3176         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3177         }
3178
3179 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3180                                                 int keylength))
3181         {
3182         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3183         }
3184 #endif
3185
3186 #ifndef OPENSSL_NO_ECDH
3187 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3188                                                                 int keylength))
3189         {
3190         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3191         }
3192
3193 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3194                                                         int keylength))
3195         {
3196         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3197         }
3198 #endif
3199
3200 #ifndef OPENSSL_NO_PSK
3201 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3202         {
3203         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3204                 {
3205                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3206                 return 0;
3207                 }
3208         if (ctx->psk_identity_hint != NULL)
3209                 OPENSSL_free(ctx->psk_identity_hint);
3210         if (identity_hint != NULL)
3211                 {
3212                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3213                 if (ctx->psk_identity_hint == NULL)
3214                         return 0;
3215                 }
3216         else
3217                 ctx->psk_identity_hint = NULL;
3218         return 1;
3219         }
3220
3221 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3222         {
3223         if (s == NULL)
3224                 return 0;
3225
3226         if (s->session == NULL)
3227                 return 1; /* session not created yet, ignored */
3228
3229         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3230                 {
3231                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3232                 return 0;
3233                 }
3234         if (s->session->psk_identity_hint != NULL)
3235                 OPENSSL_free(s->session->psk_identity_hint);
3236         if (identity_hint != NULL)
3237                 {
3238                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3239                 if (s->session->psk_identity_hint == NULL)
3240                         return 0;
3241                 }
3242         else
3243                 s->session->psk_identity_hint = NULL;
3244         return 1;
3245         }
3246
3247 const char *SSL_get_psk_identity_hint(const SSL *s)
3248         {
3249         if (s == NULL || s->session == NULL)
3250                 return NULL;
3251         return(s->session->psk_identity_hint);
3252         }
3253
3254 const char *SSL_get_psk_identity(const SSL *s)
3255         {
3256         if (s == NULL || s->session == NULL)
3257                 return NULL;
3258         return(s->session->psk_identity);
3259         }
3260
3261 void SSL_set_psk_client_callback(SSL *s,
3262     unsigned int (*cb)(SSL *ssl, const char *hint,
3263                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3264                        unsigned int max_psk_len))
3265         {
3266         s->psk_client_callback = cb;
3267         }
3268
3269 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3270     unsigned int (*cb)(SSL *ssl, const char *hint,
3271                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3272                        unsigned int max_psk_len))
3273         {
3274         ctx->psk_client_callback = cb;
3275         }
3276
3277 void SSL_set_psk_server_callback(SSL *s,
3278     unsigned int (*cb)(SSL *ssl, const char *identity,
3279                        unsigned char *psk, unsigned int max_psk_len))
3280         {
3281         s->psk_server_callback = cb;
3282         }
3283
3284 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3285     unsigned int (*cb)(SSL *ssl, const char *identity,
3286                        unsigned char *psk, unsigned int max_psk_len))
3287         {
3288         ctx->psk_server_callback = cb;
3289         }
3290 #endif
3291
3292 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))
3293         {
3294         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3295         }
3296 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))
3297         {
3298         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3299         }
3300
3301 int SSL_cutthrough_complete(const SSL *s)
3302         {
3303         return (!s->server &&                 /* cutthrough only applies to clients */
3304                 !s->hit &&                        /* full-handshake */
3305                 s->version >= SSL3_VERSION &&
3306                 s->s3->in_read_app_data == 0 &&   /* cutthrough only applies to write() */
3307                 (SSL_get_mode((SSL*)s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) &&  /* cutthrough enabled */
3308                 ssl3_can_cutthrough(s) &&                                   /* cutthrough allowed */
3309                 s->s3->previous_server_finished_len == 0 &&                 /* not a renegotiation handshake */
3310                 (s->state == SSL3_ST_CR_SESSION_TICKET_A ||                 /* ready to write app-data*/
3311                         s->state == SSL3_ST_CR_FINISHED_A));
3312         }
3313
3314 int ssl3_can_cutthrough(const SSL *s)
3315         {
3316         const SSL_CIPHER *c;
3317
3318         /* require a strong enough cipher */
3319         if (SSL_get_cipher_bits(s, NULL) < 128)
3320                 return 0;
3321
3322         /* require NPN extension */
3323 #ifndef OPENSSL_NO_NEXTPROTONEG
3324         if (!s->s3->next_proto_neg_seen)
3325                 return 0;
3326 #else
3327         return 0;
3328 #endif
3329
3330         /* require a forward-secret cipher */
3331         c = SSL_get_current_cipher(s);
3332         if (!c || (c->algorithm_mkey != SSL_kEDH &&
3333                         c->algorithm_mkey != SSL_kEECDH))
3334                 {
3335                 return 0;
3336                 }
3337
3338         return 1;
3339         }
3340
3341 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3342  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3343  * any. If EVP_MD pointer is passed, initializes ctx with this md
3344  * Returns newly allocated ctx;
3345  */
3346
3347 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3348 {
3349         ssl_clear_hash_ctx(hash);
3350         *hash = EVP_MD_CTX_create();
3351         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3352         return *hash;
3353 }
3354 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3355 {
3356
3357         if (*hash) EVP_MD_CTX_destroy(*hash);
3358         *hash=NULL;
3359 }
3360
3361 void SSL_set_debug(SSL *s, int debug)
3362         {
3363         s->debug = debug;
3364         }
3365
3366 int SSL_cache_hit(SSL *s)
3367         {
3368         return s->hit;
3369         }
3370
3371 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3372 #include "../crypto/bio/bss_file.c"
3373 #endif
3374
3375 IMPLEMENT_STACK_OF(SSL_CIPHER)
3376 IMPLEMENT_STACK_OF(SSL_COMP)
3377 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3378                                     ssl_cipher_id);