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, ctx->cert);
 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         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
 326 #if 0
 327         s->verify_depth=ctx->verify_depth;
 328 #endif
 329         s->sid_ctx_length=ctx->sid_ctx_length;
 330         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 331         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 332         s->verify_callback=ctx->default_verify_callback;
 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_EC
 361         if (ctx->tlsext_ecpointformatlist)
 362                 {
 363                 s->tlsext_ecpointformatlist =
 364                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 365                                         ctx->tlsext_ecpointformatlist_length);
 366                 if (!s->tlsext_ecpointformatlist)
 367                         goto err;
 368                 s->tlsext_ecpointformatlist_length =
 369                                         ctx->tlsext_ecpointformatlist_length;
 370                 }
 371         if (ctx->tlsext_ellipticcurvelist)
 372                 {
 373                 s->tlsext_ellipticcurvelist =
 374                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 375                                         ctx->tlsext_ellipticcurvelist_length);
 376                 if (!s->tlsext_ellipticcurvelist)
 377                         goto err;
 378                 s->tlsext_ellipticcurvelist_length =
 379                                         ctx->tlsext_ellipticcurvelist_length;
 380                 }
 381 #endif
 382 # ifndef OPENSSL_NO_NEXTPROTONEG
 383         s->next_proto_negotiated = NULL;
 384 # endif
 385
 386         if (s->ctx->alpn_client_proto_list)
 387                 {
 388                 s->alpn_client_proto_list =
 389                         OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
 390                 if (s->alpn_client_proto_list == NULL)
 391                         goto err;
 392                 memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
 393                        s->ctx->alpn_client_proto_list_len);
 394                 s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
 395                 }
 396 #endif
 397
 398         s->verify_result=X509_V_OK;
 399
 400         s->method=ctx->method;
 401
 402         if (!s->method->ssl_new(s))
 403                 goto err;
 404
 405         s->references=1;
 406         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 407
 408         SSL_clear(s);
 409
 410         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 411
 412 #ifndef OPENSSL_NO_PSK
 413         s->psk_client_callback=ctx->psk_client_callback;
 414         s->psk_server_callback=ctx->psk_server_callback;
 415 #endif
 416
 417         return(s);
 418 err:
 419         if (s != NULL)
 420                 {
 421                 if (s->cert != NULL)
 422                         ssl_cert_free(s->cert);
 423                 if (s->ctx != NULL)
 424                         SSL_CTX_free(s->ctx); /* decrement reference count */
 425                 OPENSSL_free(s);
 426                 }
 427         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 428         return(NULL);
 429         }
 430
 431 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 432                                    unsigned int sid_ctx_len)
 433     {
 434     if(sid_ctx_len > sizeof ctx->sid_ctx)
 435         {
 436         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 437         return 0;
 438         }
 439     ctx->sid_ctx_length=sid_ctx_len;
 440     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 441
 442     return 1;
 443     }
 444
 445 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 446                                unsigned int sid_ctx_len)
 447     {
 448     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 449         {
 450         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 451         return 0;
 452         }
 453     ssl->sid_ctx_length=sid_ctx_len;
 454     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 455
 456     return 1;
 457     }
 458
 459 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 460         {
 461         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 462         ctx->generate_session_id = cb;
 463         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 464         return 1;
 465         }
 466
 467 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 468         {
 469         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 470         ssl->generate_session_id = cb;
 471         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 472         return 1;
 473         }
 474
 475 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 476                                 unsigned int id_len)
 477         {
 478         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 479          * we can "construct" a session to give us the desired check - ie. to
 480          * find if there's a session in the hash table that would conflict with
 481          * any new session built out of this id/id_len and the ssl_version in
 482          * use by this SSL. */
 483         SSL_SESSION r, *p;
 484
 485         if(id_len > sizeof r.session_id)
 486                 return 0;
 487
 488         r.ssl_version = ssl->version;
 489         r.session_id_length = id_len;
 490         memcpy(r.session_id, id, id_len);
 491         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 492          * callback is calling us to check the uniqueness of a shorter ID, it
 493          * must be compared as a padded-out ID because that is what it will be
 494          * converted to when the callback has finished choosing it. */
 495         if((r.ssl_version == SSL2_VERSION) &&
 496                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 497                 {
 498                 memset(r.session_id + id_len, 0,
 499                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 500                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 501                 }
 502
 503         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 504         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 505         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 506         return (p != NULL);
 507         }
 508
 509 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 510         {
 511         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 512         }
 513
 514 int SSL_set_purpose(SSL *s, int purpose)
 515         {
 516         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 517         }
 518
 519 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 520         {
 521         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 522         }
 523
 524 int SSL_set_trust(SSL *s, int trust)
 525         {
 526         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 527         }
 528
 529 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 530         {
 531         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 532         }
 533
 534 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 535         {
 536         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 537         }
 538
 539 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
 540         {
 541         return ctx->param;
 542         }
 543
 544 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
 545         {
 546         return ssl->param;
 547         }
 548
 549 void SSL_certs_clear(SSL *s)
 550         {
 551         ssl_cert_clear_certs(s->cert);
 552         }
 553
 554 void SSL_free(SSL *s)
 555         {
 556         int i;
 557
 558         if(s == NULL)
 559             return;
 560
 561         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 562 #ifdef REF_PRINT
 563         REF_PRINT("SSL",s);
 564 #endif
 565         if (i > 0) return;
 566 #ifdef REF_CHECK
 567         if (i < 0)
 568                 {
 569                 fprintf(stderr,"SSL_free, bad reference count\n");
 570                 abort(); /* ok */
 571                 }
 572 #endif
 573
 574         if (s->param)
 575                 X509_VERIFY_PARAM_free(s->param);
 576
 577         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 578
 579         if (s->bbio != NULL)
 580                 {
 581                 /* If the buffering BIO is in place, pop it off */
 582                 if (s->bbio == s->wbio)
 583                         {
 584                         s->wbio=BIO_pop(s->wbio);
 585                         }
 586                 BIO_free(s->bbio);
 587                 s->bbio=NULL;
 588                 }
 589         if (s->rbio != NULL)
 590                 BIO_free_all(s->rbio);
 591         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 592                 BIO_free_all(s->wbio);
 593
 594         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 595
 596         /* add extra stuff */
 597         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 598         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 599
 600         /* Make the next call work :-) */
 601         if (s->session != NULL)
 602                 {
 603                 ssl_clear_bad_session(s);
 604                 SSL_SESSION_free(s->session);
 605                 }
 606
 607         ssl_clear_cipher_ctx(s);
 608         ssl_clear_hash_ctx(&s->read_hash);
 609         ssl_clear_hash_ctx(&s->write_hash);
 610
 611         if (s->cert != NULL) ssl_cert_free(s->cert);
 612         /* Free up if allocated */
 613
 614 #ifndef OPENSSL_NO_TLSEXT
 615         if (s->tlsext_hostname)
 616                 OPENSSL_free(s->tlsext_hostname);
 617         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 618 #ifndef OPENSSL_NO_EC
 619         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 620         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 621 #endif /* OPENSSL_NO_EC */
 622         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 623         if (s->tlsext_ocsp_exts)
 624                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 625                                                 X509_EXTENSION_free);
 626         if (s->tlsext_ocsp_ids)
 627                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 628         if (s->tlsext_ocsp_resp)
 629                 OPENSSL_free(s->tlsext_ocsp_resp);
 630         if (s->alpn_client_proto_list)
 631                 OPENSSL_free(s->alpn_client_proto_list);
 632 #endif
 633
 634         if (s->client_CA != NULL)
 635                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 636
 637         if (s->method != NULL) s->method->ssl_free(s);
 638
 639         if (s->ctx) SSL_CTX_free(s->ctx);
 640
 641 #ifndef OPENSSL_NO_KRB5
 642         if (s->kssl_ctx != NULL)
 643                 kssl_ctx_free(s->kssl_ctx);
 644 #endif  /* OPENSSL_NO_KRB5 */
 645
 646 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 647         if (s->next_proto_negotiated)
 648                 OPENSSL_free(s->next_proto_negotiated);
 649 #endif
 650
 651         if (s->srtp_profiles)
 652             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 653
 654         OPENSSL_free(s);
 655         }
 656
 657 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 658         {
 659         /* If the output buffering BIO is still in place, remove it
 660          */
 661         if (s->bbio != NULL)
 662                 {
 663                 if (s->wbio == s->bbio)
 664                         {
 665                         s->wbio=s->wbio->next_bio;
 666                         s->bbio->next_bio=NULL;
 667                         }
 668                 }
 669         if ((s->rbio != NULL) && (s->rbio != rbio))
 670                 BIO_free_all(s->rbio);
 671         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 672                 BIO_free_all(s->wbio);
 673         s->rbio=rbio;
 674         s->wbio=wbio;
 675         }
 676
 677 BIO *SSL_get_rbio(const SSL *s)
 678         { return(s->rbio); }
 679
 680 BIO *SSL_get_wbio(const SSL *s)
 681         { return(s->wbio); }
 682
 683 int SSL_get_fd(const SSL *s)
 684         {
 685         return(SSL_get_rfd(s));
 686         }
 687
 688 int SSL_get_rfd(const SSL *s)
 689         {
 690         int ret= -1;
 691         BIO *b,*r;
 692
 693         b=SSL_get_rbio(s);
 694         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 695         if (r != NULL)
 696                 BIO_get_fd(r,&ret);
 697         return(ret);
 698         }
 699
 700 int SSL_get_wfd(const SSL *s)
 701         {
 702         int ret= -1;
 703         BIO *b,*r;
 704
 705         b=SSL_get_wbio(s);
 706         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 707         if (r != NULL)
 708                 BIO_get_fd(r,&ret);
 709         return(ret);
 710         }
 711
 712 #ifndef OPENSSL_NO_SOCK
 713 int SSL_set_fd(SSL *s,int fd)
 714         {
 715         int ret=0;
 716         BIO *bio=NULL;
 717
 718         bio=BIO_new(BIO_s_socket());
 719
 720         if (bio == NULL)
 721                 {
 722                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 723                 goto err;
 724                 }
 725         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 726         SSL_set_bio(s,bio,bio);
 727         ret=1;
 728 err:
 729         return(ret);
 730         }
 731
 732 int SSL_set_wfd(SSL *s,int fd)
 733         {
 734         int ret=0;
 735         BIO *bio=NULL;
 736
 737         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 738                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 739                 {
 740                 bio=BIO_new(BIO_s_socket());
 741
 742                 if (bio == NULL)
 743                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 744                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 745                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 746                 }
 747         else
 748                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 749         ret=1;
 750 err:
 751         return(ret);
 752         }
 753
 754 int SSL_set_rfd(SSL *s,int fd)
 755         {
 756         int ret=0;
 757         BIO *bio=NULL;
 758
 759         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 760                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 761                 {
 762                 bio=BIO_new(BIO_s_socket());
 763
 764                 if (bio == NULL)
 765                         {
 766                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 767                         goto err;
 768                         }
 769                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 770                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 771                 }
 772         else
 773                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 774         ret=1;
 775 err:
 776         return(ret);
 777         }
 778 #endif
 779
 780
 781 /* return length of latest Finished message we sent, copy to 'buf' */
 782 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 783         {
 784         size_t ret = 0;
 785
 786         if (s->s3 != NULL)
 787                 {
 788                 ret = s->s3->tmp.finish_md_len;
 789                 if (count > ret)
 790                         count = ret;
 791                 memcpy(buf, s->s3->tmp.finish_md, count);
 792                 }
 793         return ret;
 794         }
 795
 796 /* return length of latest Finished message we expected, copy to 'buf' */
 797 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 798         {
 799         size_t ret = 0;
 800
 801         if (s->s3 != NULL)
 802                 {
 803                 ret = s->s3->tmp.peer_finish_md_len;
 804                 if (count > ret)
 805                         count = ret;
 806                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 807                 }
 808         return ret;
 809         }
 810
 811
 812 int SSL_get_verify_mode(const SSL *s)
 813         {
 814         return(s->verify_mode);
 815         }
 816
 817 int SSL_get_verify_depth(const SSL *s)
 818         {
 819         return X509_VERIFY_PARAM_get_depth(s->param);
 820         }
 821
 822 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 823         {
 824         return(s->verify_callback);
 825         }
 826
 827 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 828         {
 829         return(ctx->verify_mode);
 830         }
 831
 832 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 833         {
 834         return X509_VERIFY_PARAM_get_depth(ctx->param);
 835         }
 836
 837 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 838         {
 839         return(ctx->default_verify_callback);
 840         }
 841
 842 void SSL_set_verify(SSL *s,int mode,
 843                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 844         {
 845         s->verify_mode=mode;
 846         if (callback != NULL)
 847                 s->verify_callback=callback;
 848         }
 849
 850 void SSL_set_verify_depth(SSL *s,int depth)
 851         {
 852         X509_VERIFY_PARAM_set_depth(s->param, depth);
 853         }
 854
 855 void SSL_set_read_ahead(SSL *s,int yes)
 856         {
 857         s->read_ahead=yes;
 858         }
 859
 860 int SSL_get_read_ahead(const SSL *s)
 861         {
 862         return(s->read_ahead);
 863         }
 864
 865 int SSL_pending(const SSL *s)
 866         {
 867         /* SSL_pending cannot work properly if read-ahead is enabled
 868          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 869          * and it is impossible to fix since SSL_pending cannot report
 870          * errors that may be observed while scanning the new data.
 871          * (Note that SSL_pending() is often used as a boolean value,
 872          * so we'd better not return -1.)
 873          */
 874         return(s->method->ssl_pending(s));
 875         }
 876
 877 X509 *SSL_get_peer_certificate(const SSL *s)
 878         {
 879         X509 *r;
 880
 881         if ((s == NULL) || (s->session == NULL))
 882                 r=NULL;
 883         else
 884                 r=s->session->peer;
 885
 886         if (r == NULL) return(r);
 887
 888         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 889
 890         return(r);
 891         }
 892
 893 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 894         {
 895         STACK_OF(X509) *r;
 896
 897         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 898                 r=NULL;
 899         else
 900                 r=s->session->sess_cert->cert_chain;
 901
 902         /* If we are a client, cert_chain includes the peer's own
 903          * certificate; if we are a server, it does not. */
 904
 905         return(r);
 906         }
 907
 908 /* Now in theory, since the calling process own 't' it should be safe to
 909  * modify.  We need to be able to read f without being hassled */
 910 void SSL_copy_session_id(SSL *t,const SSL *f)
 911         {
 912         CERT *tmp;
 913
 914         /* Do we need to to SSL locking? */
 915         SSL_set_session(t,SSL_get_session(f));
 916
 917         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 918          * vice-versa */
 919         if (t->method != f->method)
 920                 {
 921                 t->method->ssl_free(t); /* cleanup current */
 922                 t->method=f->method;    /* change method */
 923                 t->method->ssl_new(t);  /* setup new */
 924                 }
 925
 926         tmp=t->cert;
 927         if (f->cert != NULL)
 928                 {
 929                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 930                 t->cert=f->cert;
 931                 }
 932         else
 933                 t->cert=NULL;
 934         if (tmp != NULL) ssl_cert_free(tmp);
 935         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 936         }
 937
 938 /* Fix this so it checks all the valid key/cert options */
 939 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 940         {
 941         if (    (ctx == NULL) ||
 942                 (ctx->cert == NULL) ||
 943                 (ctx->cert->key->x509 == NULL))
 944                 {
 945                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 946                 return(0);
 947                 }
 948         if      (ctx->cert->key->privatekey == NULL)
 949                 {
 950                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 951                 return(0);
 952                 }
 953         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 954         }
 955
 956 /* Fix this function so that it takes an optional type parameter */
 957 int SSL_check_private_key(const SSL *ssl)
 958         {
 959         if (ssl == NULL)
 960                 {
 961                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 962                 return(0);
 963                 }
 964         if (ssl->cert == NULL)
 965                 {
 966                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 967                 return 0;
 968                 }
 969         if (ssl->cert->key->x509 == NULL)
 970                 {
 971                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 972                 return(0);
 973                 }
 974         if (ssl->cert->key->privatekey == NULL)
 975                 {
 976                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 977                 return(0);
 978                 }
 979         return(X509_check_private_key(ssl->cert->key->x509,
 980                 ssl->cert->key->privatekey));
 981         }
 982
 983 int SSL_accept(SSL *s)
 984         {
 985         if (s->handshake_func == 0)
 986                 /* Not properly initialized yet */
 987                 SSL_set_accept_state(s);
 988
 989         return(s->method->ssl_accept(s));
 990         }
 991
 992 int SSL_connect(SSL *s)
 993         {
 994         if (s->handshake_func == 0)
 995                 /* Not properly initialized yet */
 996                 SSL_set_connect_state(s);
 997
 998         return(s->method->ssl_connect(s));
 999         }
1000
1001 long SSL_get_default_timeout(const SSL *s)
1002         {
1003         return(s->method->get_timeout());
1004         }
1005
1006 int SSL_read(SSL *s,void *buf,int num)
1007         {
1008         if (s->handshake_func == 0)
1009                 {
1010                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
1011                 return -1;
1012                 }
1013
1014         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1015                 {
1016                 s->rwstate=SSL_NOTHING;
1017                 return(0);
1018                 }
1019         return(s->method->ssl_read(s,buf,num));
1020         }
1021
1022 int SSL_peek(SSL *s,void *buf,int num)
1023         {
1024         if (s->handshake_func == 0)
1025                 {
1026                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1027                 return -1;
1028                 }
1029
1030         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1031                 {
1032                 return(0);
1033                 }
1034         return(s->method->ssl_peek(s,buf,num));
1035         }
1036
1037 int SSL_write(SSL *s,const void *buf,int num)
1038         {
1039         if (s->handshake_func == 0)
1040                 {
1041                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1042                 return -1;
1043                 }
1044
1045         if (s->shutdown & SSL_SENT_SHUTDOWN)
1046                 {
1047                 s->rwstate=SSL_NOTHING;
1048                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1049                 return(-1);
1050                 }
1051         return(s->method->ssl_write(s,buf,num));
1052         }
1053
1054 int SSL_shutdown(SSL *s)
1055         {
1056         /* Note that this function behaves differently from what one might
1057          * expect.  Return values are 0 for no success (yet),
1058          * 1 for success; but calling it once is usually not enough,
1059          * even if blocking I/O is used (see ssl3_shutdown).
1060          */
1061
1062         if (s->handshake_func == 0)
1063                 {
1064                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1065                 return -1;
1066                 }
1067
1068         if ((s != NULL) && !SSL_in_init(s))
1069                 return(s->method->ssl_shutdown(s));
1070         else
1071                 return(1);
1072         }
1073
1074 int SSL_renegotiate(SSL *s)
1075         {
1076         if (s->renegotiate == 0)
1077                 s->renegotiate=1;
1078
1079         s->new_session=1;
1080
1081         return(s->method->ssl_renegotiate(s));
1082         }
1083
1084 int SSL_renegotiate_abbreviated(SSL *s)
1085         {
1086         if (s->renegotiate == 0)
1087                 s->renegotiate=1;
1088
1089         s->new_session=0;
1090
1091         return(s->method->ssl_renegotiate(s));
1092         }
1093
1094 int SSL_renegotiate_pending(SSL *s)
1095         {
1096         /* becomes true when negotiation is requested;
1097          * false again once a handshake has finished */
1098         return (s->renegotiate != 0);
1099         }
1100
1101 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1102         {
1103         long l;
1104
1105         switch (cmd)
1106                 {
1107         case SSL_CTRL_GET_READ_AHEAD:
1108                 return(s->read_ahead);
1109         case SSL_CTRL_SET_READ_AHEAD:
1110                 l=s->read_ahead;
1111                 s->read_ahead=larg;
1112                 return(l);
1113
1114         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1115                 s->msg_callback_arg = parg;
1116                 return 1;
1117
1118         case SSL_CTRL_OPTIONS:
1119                 return(s->options|=larg);
1120         case SSL_CTRL_CLEAR_OPTIONS:
1121                 return(s->options&=~larg);
1122         case SSL_CTRL_MODE:
1123                 return(s->mode|=larg);
1124         case SSL_CTRL_CLEAR_MODE:
1125                 return(s->mode &=~larg);
1126         case SSL_CTRL_GET_MAX_CERT_LIST:
1127                 return(s->max_cert_list);
1128         case SSL_CTRL_SET_MAX_CERT_LIST:
1129                 l=s->max_cert_list;
1130                 s->max_cert_list=larg;
1131                 return(l);
1132         case SSL_CTRL_SET_MTU:
1133 #ifndef OPENSSL_NO_DTLS1
1134                 if (larg < (long)dtls1_min_mtu())
1135                         return 0;
1136 #endif
1137
1138                 if (SSL_IS_DTLS(s))
1139                         {
1140                         s->d1->mtu = larg;
1141                         return larg;
1142                         }
1143                 return 0;
1144         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1145                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1146                         return 0;
1147                 s->max_send_fragment = larg;
1148                 return 1;
1149         case SSL_CTRL_GET_RI_SUPPORT:
1150                 if (s->s3)
1151                         return s->s3->send_connection_binding;
1152                 else return 0;
1153         case SSL_CTRL_CERT_FLAGS:
1154                 return(s->cert->cert_flags|=larg);
1155         case SSL_CTRL_CLEAR_CERT_FLAGS:
1156                 return(s->cert->cert_flags &=~larg);
1157
1158         case SSL_CTRL_GET_RAW_CIPHERLIST:
1159                 if (parg)
1160                         {
1161                         if (s->cert->ciphers_raw == NULL)
1162                                 return 0;
1163                         *(unsigned char **)parg = s->cert->ciphers_raw;
1164                         return (int)s->cert->ciphers_rawlen;
1165                         }
1166                 else
1167                         return ssl_put_cipher_by_char(s,NULL,NULL);
1168         default:
1169                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1170                 }
1171         }
1172
1173 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1174         {
1175         switch(cmd)
1176                 {
1177         case SSL_CTRL_SET_MSG_CALLBACK:
1178                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1179                 return 1;
1180
1181         default:
1182                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1183                 }
1184         }
1185
1186 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1187         {
1188         return ctx->sessions;
1189         }
1190
1191 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1192         {
1193         long l;
1194         /* For some cases with ctx == NULL perform syntax checks */
1195         if (ctx == NULL)
1196                 {
1197                 switch (cmd)
1198                         {
1199 #ifndef OPENSSL_NO_EC
1200                 case SSL_CTRL_SET_CURVES_LIST:
1201                         return tls1_set_curves_list(NULL, NULL, parg);
1202 #endif
1203                 case SSL_CTRL_SET_SIGALGS_LIST:
1204                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1205                         return tls1_set_sigalgs_list(NULL, parg, 0);
1206                 default:
1207                         return 0;
1208                         }
1209                 }
1210
1211         switch (cmd)
1212                 {
1213         case SSL_CTRL_GET_READ_AHEAD:
1214                 return(ctx->read_ahead);
1215         case SSL_CTRL_SET_READ_AHEAD:
1216                 l=ctx->read_ahead;
1217                 ctx->read_ahead=larg;
1218                 return(l);
1219
1220         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1221                 ctx->msg_callback_arg = parg;
1222                 return 1;
1223
1224         case SSL_CTRL_GET_MAX_CERT_LIST:
1225                 return(ctx->max_cert_list);
1226         case SSL_CTRL_SET_MAX_CERT_LIST:
1227                 l=ctx->max_cert_list;
1228                 ctx->max_cert_list=larg;
1229                 return(l);
1230
1231         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1232                 l=ctx->session_cache_size;
1233                 ctx->session_cache_size=larg;
1234                 return(l);
1235         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1236                 return(ctx->session_cache_size);
1237         case SSL_CTRL_SET_SESS_CACHE_MODE:
1238                 l=ctx->session_cache_mode;
1239                 ctx->session_cache_mode=larg;
1240                 return(l);
1241         case SSL_CTRL_GET_SESS_CACHE_MODE:
1242                 return(ctx->session_cache_mode);
1243
1244         case SSL_CTRL_SESS_NUMBER:
1245                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1246         case SSL_CTRL_SESS_CONNECT:
1247                 return(ctx->stats.sess_connect);
1248         case SSL_CTRL_SESS_CONNECT_GOOD:
1249                 return(ctx->stats.sess_connect_good);
1250         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1251                 return(ctx->stats.sess_connect_renegotiate);
1252         case SSL_CTRL_SESS_ACCEPT:
1253                 return(ctx->stats.sess_accept);
1254         case SSL_CTRL_SESS_ACCEPT_GOOD:
1255                 return(ctx->stats.sess_accept_good);
1256         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1257                 return(ctx->stats.sess_accept_renegotiate);
1258         case SSL_CTRL_SESS_HIT:
1259                 return(ctx->stats.sess_hit);
1260         case SSL_CTRL_SESS_CB_HIT:
1261                 return(ctx->stats.sess_cb_hit);
1262         case SSL_CTRL_SESS_MISSES:
1263                 return(ctx->stats.sess_miss);
1264         case SSL_CTRL_SESS_TIMEOUTS:
1265                 return(ctx->stats.sess_timeout);
1266         case SSL_CTRL_SESS_CACHE_FULL:
1267                 return(ctx->stats.sess_cache_full);
1268         case SSL_CTRL_OPTIONS:
1269                 return(ctx->options|=larg);
1270         case SSL_CTRL_CLEAR_OPTIONS:
1271                 return(ctx->options&=~larg);
1272         case SSL_CTRL_MODE:
1273                 return(ctx->mode|=larg);
1274         case SSL_CTRL_CLEAR_MODE:
1275                 return(ctx->mode&=~larg);
1276         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1277                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1278                         return 0;
1279                 ctx->max_send_fragment = larg;
1280                 return 1;
1281         case SSL_CTRL_CERT_FLAGS:
1282                 return(ctx->cert->cert_flags|=larg);
1283         case SSL_CTRL_CLEAR_CERT_FLAGS:
1284                 return(ctx->cert->cert_flags &=~larg);
1285         default:
1286                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1287                 }
1288         }
1289
1290 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1291         {
1292         switch(cmd)
1293                 {
1294         case SSL_CTRL_SET_MSG_CALLBACK:
1295                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1296                 return 1;
1297
1298         default:
1299                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1300                 }
1301         }
1302
1303 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1304         {
1305         long l;
1306
1307         l=a->id-b->id;
1308         if (l == 0L)
1309                 return(0);
1310         else
1311                 return((l > 0)?1:-1);
1312         }
1313
1314 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1315                         const SSL_CIPHER * const *bp)
1316         {
1317         long l;
1318
1319         l=(*ap)->id-(*bp)->id;
1320         if (l == 0L)
1321                 return(0);
1322         else
1323                 return((l > 0)?1:-1);
1324         }
1325
1326 /** return a STACK of the ciphers available for the SSL and in order of
1327  * preference */
1328 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1329         {
1330         if (s != NULL)
1331                 {
1332                 if (s->cipher_list != NULL)
1333                         {
1334                         return(s->cipher_list);
1335                         }
1336                 else if ((s->ctx != NULL) &&
1337                         (s->ctx->cipher_list != NULL))
1338                         {
1339                         return(s->ctx->cipher_list);
1340                         }
1341                 }
1342         return(NULL);
1343         }
1344
1345 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
1346         {
1347         STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
1348         int i;
1349         ciphers = SSL_get_ciphers(s);
1350         if (!ciphers)
1351                 return NULL;
1352         ssl_set_client_disabled(s);
1353         for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
1354                 {
1355                 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
1356                 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
1357                         {
1358                         if (!sk)
1359                                 sk = sk_SSL_CIPHER_new_null();
1360                         if (!sk)
1361                                 return NULL;
1362                         if (!sk_SSL_CIPHER_push(sk, c))
1363                                 {
1364                                 sk_SSL_CIPHER_free(sk);
1365                                 return NULL;
1366                                 }
1367                         }
1368                 }
1369         return sk;
1370         }
1371
1372 /** return a STACK of the ciphers available for the SSL and in order of
1373  * algorithm id */
1374 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1375         {
1376         if (s != NULL)
1377                 {
1378                 if (s->cipher_list_by_id != NULL)
1379                         {
1380                         return(s->cipher_list_by_id);
1381                         }
1382                 else if ((s->ctx != NULL) &&
1383                         (s->ctx->cipher_list_by_id != NULL))
1384                         {
1385                         return(s->ctx->cipher_list_by_id);
1386                         }
1387                 }
1388         return(NULL);
1389         }
1390
1391 /** The old interface to get the same thing as SSL_get_ciphers() */
1392 const char *SSL_get_cipher_list(const SSL *s,int n)
1393         {
1394         SSL_CIPHER *c;
1395         STACK_OF(SSL_CIPHER) *sk;
1396
1397         if (s == NULL) return(NULL);
1398         sk=SSL_get_ciphers(s);
1399         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1400                 return(NULL);
1401         c=sk_SSL_CIPHER_value(sk,n);
1402         if (c == NULL) return(NULL);
1403         return(c->name);
1404         }
1405
1406 /** specify the ciphers to be used by default by the SSL_CTX */
1407 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1408         {
1409         STACK_OF(SSL_CIPHER) *sk;
1410
1411         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1412                 &ctx->cipher_list_by_id,str, ctx->cert);
1413         /* ssl_create_cipher_list may return an empty stack if it
1414          * was unable to find a cipher matching the given rule string
1415          * (for example if the rule string specifies a cipher which
1416          * has been disabled). This is not an error as far as
1417          * ssl_create_cipher_list is concerned, and hence
1418          * ctx->cipher_list and ctx->cipher_list_by_id has been
1419          * updated. */
1420         if (sk == NULL)
1421                 return 0;
1422         else if (sk_SSL_CIPHER_num(sk) == 0)
1423                 {
1424                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1425                 return 0;
1426                 }
1427         return 1;
1428         }
1429
1430 /** specify the ciphers to be used by the SSL */
1431 int SSL_set_cipher_list(SSL *s,const char *str)
1432         {
1433         STACK_OF(SSL_CIPHER) *sk;
1434
1435         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1436                 &s->cipher_list_by_id,str, s->cert);
1437         /* see comment in SSL_CTX_set_cipher_list */
1438         if (sk == NULL)
1439                 return 0;
1440         else if (sk_SSL_CIPHER_num(sk) == 0)
1441                 {
1442                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1443                 return 0;
1444                 }
1445         return 1;
1446         }
1447
1448 /* works well for SSLv2, not so good for SSLv3 */
1449 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1450         {
1451         char *p;
1452         STACK_OF(SSL_CIPHER) *sk;
1453         SSL_CIPHER *c;
1454         int i;
1455
1456         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1457                 (len < 2))
1458                 return(NULL);
1459
1460         p=buf;
1461         sk=s->session->ciphers;
1462
1463         if (sk_SSL_CIPHER_num(sk) == 0)
1464                 return NULL;
1465
1466         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1467                 {
1468                 int n;
1469
1470                 c=sk_SSL_CIPHER_value(sk,i);
1471                 n=strlen(c->name);
1472                 if (n+1 > len)
1473                         {
1474                         if (p != buf)
1475                                 --p;
1476                         *p='\0';
1477                         return buf;
1478                         }
1479                 strcpy(p,c->name);
1480                 p+=n;
1481                 *(p++)=':';
1482                 len-=n+1;
1483                 }
1484         p[-1]='\0';
1485         return(buf);
1486         }
1487
1488 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1489                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1490         {
1491         int i,j=0;
1492         SSL_CIPHER *c;
1493         unsigned char *q;
1494         int no_scsv = s->renegotiate;
1495         /* Set disabled masks for this session */
1496         ssl_set_client_disabled(s);
1497
1498         if (sk == NULL) return(0);
1499         q=p;
1500
1501         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1502                 {
1503                 c=sk_SSL_CIPHER_value(sk,i);
1504                 /* Skip disabled ciphers */
1505                 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
1506                         continue;
1507 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1508                 if (c->id == SSL3_CK_SCSV)
1509                         {
1510                         if (no_scsv)
1511                                 continue;
1512                         else
1513                                 no_scsv = 1;
1514                         }
1515 #endif
1516                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1517                 p+=j;
1518                 }
1519         /* If p == q, no ciphers and caller indicates an error. Otherwise
1520          * add SCSV if not renegotiating.
1521          */
1522         if (p != q && !no_scsv)
1523                 {
1524                 static SSL_CIPHER scsv =
1525                         {
1526                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1527                         };
1528                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1529                 p+=j;
1530 #ifdef OPENSSL_RI_DEBUG
1531                 fprintf(stderr, "SCSV sent by client\n");
1532 #endif
1533                 }
1534
1535         return(p-q);
1536         }
1537
1538 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1539                                                STACK_OF(SSL_CIPHER) **skp)
1540         {
1541         const SSL_CIPHER *c;
1542         STACK_OF(SSL_CIPHER) *sk;
1543         int i,n;
1544         if (s->s3)
1545                 s->s3->send_connection_binding = 0;
1546
1547         n=ssl_put_cipher_by_char(s,NULL,NULL);
1548         if ((num%n) != 0)
1549                 {
1550                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1551                 return(NULL);
1552                 }
1553         if ((skp == NULL) || (*skp == NULL))
1554                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1555         else
1556                 {
1557                 sk= *skp;
1558                 sk_SSL_CIPHER_zero(sk);
1559                 }
1560
1561         if (s->cert->ciphers_raw)
1562                 OPENSSL_free(s->cert->ciphers_raw);
1563         s->cert->ciphers_raw = BUF_memdup(p, num);
1564         if (s->cert->ciphers_raw == NULL)
1565                 {
1566                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1567                 goto err;
1568                 }
1569         s->cert->ciphers_rawlen = (size_t)num;
1570
1571         for (i=0; i<num; i+=n)
1572                 {
1573                 /* Check for SCSV */
1574                 if (s->s3 && (n != 3 || !p[0]) &&
1575                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1576                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1577                         {
1578                         /* SCSV fatal if renegotiating */
1579                         if (s->renegotiate)
1580                                 {
1581                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1582                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1583                                 goto err;
1584                                 }
1585                         s->s3->send_connection_binding = 1;
1586                         p += n;
1587 #ifdef OPENSSL_RI_DEBUG
1588                         fprintf(stderr, "SCSV received by server\n");
1589 #endif
1590                         continue;
1591                         }
1592
1593                 c=ssl_get_cipher_by_char(s,p);
1594                 p+=n;
1595                 if (c != NULL)
1596                         {
1597                         if (!sk_SSL_CIPHER_push(sk,c))
1598                                 {
1599                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1600                                 goto err;
1601                                 }
1602                         }
1603                 }
1604
1605         if (skp != NULL)
1606                 *skp=sk;
1607         return(sk);
1608 err:
1609         if ((skp == NULL) || (*skp == NULL))
1610                 sk_SSL_CIPHER_free(sk);
1611         return(NULL);
1612         }
1613
1614
1615 #ifndef OPENSSL_NO_TLSEXT
1616 /** return a servername extension value if provided in Client Hello, or NULL.
1617  * So far, only host_name types are defined (RFC 3546).
1618  */
1619
1620 const char *SSL_get_servername(const SSL *s, const int type)
1621         {
1622         if (type != TLSEXT_NAMETYPE_host_name)
1623                 return NULL;
1624
1625         return s->session && !s->tlsext_hostname ?
1626                 s->session->tlsext_hostname :
1627                 s->tlsext_hostname;
1628         }
1629
1630 int SSL_get_servername_type(const SSL *s)
1631         {
1632         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1633                 return TLSEXT_NAMETYPE_host_name;
1634         return -1;
1635         }
1636
1637 /* SSL_select_next_proto implements the standard protocol selection. It is
1638  * expected that this function is called from the callback set by
1639  * SSL_CTX_set_next_proto_select_cb.
1640  *
1641  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1642  * strings. The length byte itself is not included in the length. A byte
1643  * string of length 0 is invalid. No byte string may be truncated.
1644  *
1645  * The current, but experimental algorithm for selecting the protocol is:
1646  *
1647  * 1) If the server doesn't support NPN then this is indicated to the
1648  * callback. In this case, the client application has to abort the connection
1649  * or have a default application level protocol.
1650  *
1651  * 2) If the server supports NPN, but advertises an empty list then the
1652  * client selects the first protcol in its list, but indicates via the
1653  * API that this fallback case was enacted.
1654  *
1655  * 3) Otherwise, the client finds the first protocol in the server's list
1656  * that it supports and selects this protocol. This is because it's
1657  * assumed that the server has better information about which protocol
1658  * a client should use.
1659  *
1660  * 4) If the client doesn't support any of the server's advertised
1661  * protocols, then this is treated the same as case 2.
1662  *
1663  * It returns either
1664  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1665  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1666  */
1667 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)
1668         {
1669         unsigned int i, j;
1670         const unsigned char *result;
1671         int status = OPENSSL_NPN_UNSUPPORTED;
1672
1673         /* For each protocol in server preference order, see if we support it. */
1674         for (i = 0; i < server_len; )
1675                 {
1676                 for (j = 0; j < client_len; )
1677                         {
1678                         if (server[i] == client[j] &&
1679                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1680                                 {
1681                                 /* We found a match */
1682                                 result = &server[i];
1683                                 status = OPENSSL_NPN_NEGOTIATED;
1684                                 goto found;
1685                                 }
1686                         j += client[j];
1687                         j++;
1688                         }
1689                 i += server[i];
1690                 i++;
1691                 }
1692
1693         /* There's no overlap between our protocols and the server's list. */
1694         result = client;
1695         status = OPENSSL_NPN_NO_OVERLAP;
1696
1697         found:
1698         *out = (unsigned char *) result + 1;
1699         *outlen = result[0];
1700         return status;
1701         }
1702
1703 # ifndef OPENSSL_NO_NEXTPROTONEG
1704 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1705  * requested protocol for this connection and returns 0. If the client didn't
1706  * request any protocol, then *data is set to NULL.
1707  *
1708  * Note that the client can request any protocol it chooses. The value returned
1709  * from this function need not be a member of the list of supported protocols
1710  * provided by the callback.
1711  */
1712 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1713         {
1714         *data = s->next_proto_negotiated;
1715         if (!*data) {
1716                 *len = 0;
1717         } else {
1718                 *len = s->next_proto_negotiated_len;
1719         }
1720 }
1721
1722 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1723  * TLS server needs a list of supported protocols for Next Protocol
1724  * Negotiation. The returned list must be in wire format.  The list is returned
1725  * by setting |out| to point to it and |outlen| to its length. This memory will
1726  * not be modified, but one should assume that the SSL* keeps a reference to
1727  * it.
1728  *
1729  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1730  * such extension will be included in the ServerHello. */
1731 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)
1732         {
1733         ctx->next_protos_advertised_cb = cb;
1734         ctx->next_protos_advertised_cb_arg = arg;
1735         }
1736
1737 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1738  * client needs to select a protocol from the server's provided list. |out|
1739  * must be set to point to the selected protocol (which may be within |in|).
1740  * The length of the protocol name must be written into |outlen|. The server's
1741  * advertised protocols are provided in |in| and |inlen|. The callback can
1742  * assume that |in| is syntactically valid.
1743  *
1744  * The client must select a protocol. It is fatal to the connection if this
1745  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1746  */
1747 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)
1748         {
1749         ctx->next_proto_select_cb = cb;
1750         ctx->next_proto_select_cb_arg = arg;
1751         }
1752 # endif
1753
1754 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
1755  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1756  * length-prefixed strings).
1757  *
1758  * Returns 0 on success. */
1759 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
1760                             unsigned protos_len)
1761         {
1762         if (ctx->alpn_client_proto_list)
1763                 OPENSSL_free(ctx->alpn_client_proto_list);
1764
1765         ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1766         if (!ctx->alpn_client_proto_list)
1767                 return 1;
1768         memcpy(ctx->alpn_client_proto_list, protos, protos_len);
1769         ctx->alpn_client_proto_list_len = protos_len;
1770
1771         return 0;
1772         }
1773
1774 /* SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
1775  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1776  * length-prefixed strings).
1777  *
1778  * Returns 0 on success. */
1779 int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
1780                         unsigned protos_len)
1781         {
1782         if (ssl->alpn_client_proto_list)
1783                 OPENSSL_free(ssl->alpn_client_proto_list);
1784
1785         ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1786         if (!ssl->alpn_client_proto_list)
1787                 return 1;
1788         memcpy(ssl->alpn_client_proto_list, protos, protos_len);
1789         ssl->alpn_client_proto_list_len = protos_len;
1790
1791         return 0;
1792         }
1793
1794 /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
1795  * during ClientHello processing in order to select an ALPN protocol from the
1796  * client's list of offered protocols. */
1797 void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
1798                                 int (*cb) (SSL *ssl,
1799                                            const unsigned char **out,
1800                                            unsigned char *outlen,
1801                                            const unsigned char *in,
1802                                            unsigned int inlen,
1803                                            void *arg),
1804                                 void *arg)
1805         {
1806         ctx->alpn_select_cb = cb;
1807         ctx->alpn_select_cb_arg = arg;
1808         }
1809
1810 /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
1811  * On return it sets |*data| to point to |*len| bytes of protocol name (not
1812  * including the leading length-prefix byte). If the server didn't respond with
1813  * a negotiated protocol then |*len| will be zero. */
1814 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1815                             unsigned *len)
1816         {
1817         *data = NULL;
1818         if (ssl->s3)
1819                 *data = ssl->s3->alpn_selected;
1820         if (*data == NULL)
1821                 *len = 0;
1822         else
1823                 *len = ssl->s3->alpn_selected_len;
1824         }
1825
1826 #endif /* !OPENSSL_NO_TLSEXT */
1827
1828 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1829         const char *label, size_t llen, const unsigned char *p, size_t plen,
1830         int use_context)
1831         {
1832         if (s->version < TLS1_VERSION)
1833                 return -1;
1834
1835         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1836                                                            llen, p, plen,
1837                                                            use_context);
1838         }
1839
1840 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1841         {
1842         unsigned long l;
1843
1844         l=(unsigned long)
1845                 ((unsigned int) a->session_id[0]     )|
1846                 ((unsigned int) a->session_id[1]<< 8L)|
1847                 ((unsigned long)a->session_id[2]<<16L)|
1848                 ((unsigned long)a->session_id[3]<<24L);
1849         return(l);
1850         }
1851
1852 /* NB: If this function (or indeed the hash function which uses a sort of
1853  * coarser function than this one) is changed, ensure
1854  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1855  * able to construct an SSL_SESSION that will collide with any existing session
1856  * with a matching session ID. */
1857 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1858         {
1859         if (a->ssl_version != b->ssl_version)
1860                 return(1);
1861         if (a->session_id_length != b->session_id_length)
1862                 return(1);
1863         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1864         }
1865
1866 /* These wrapper functions should remain rather than redeclaring
1867  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1868  * variable. The reason is that the functions aren't static, they're exposed via
1869  * ssl.h. */
1870 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1871 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1872
1873 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1874         {
1875         SSL_CTX *ret=NULL;
1876
1877         if (meth == NULL)
1878                 {
1879                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1880                 return(NULL);
1881                 }
1882
1883 #ifdef OPENSSL_FIPS
1884         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1885                 {
1886                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1887                 return NULL;
1888                 }
1889 #endif
1890
1891         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1892                 {
1893                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1894                 goto err;
1895                 }
1896         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1897         if (ret == NULL)
1898                 goto err;
1899
1900         memset(ret,0,sizeof(SSL_CTX));
1901
1902         ret->method=meth;
1903
1904         ret->cert_store=NULL;
1905         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1906         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1907         ret->session_cache_head=NULL;
1908         ret->session_cache_tail=NULL;
1909
1910         /* We take the system default */
1911         ret->session_timeout=meth->get_timeout();
1912
1913         ret->new_session_cb=0;
1914         ret->remove_session_cb=0;
1915         ret->get_session_cb=0;
1916         ret->generate_session_id=0;
1917
1918         memset((char *)&ret->stats,0,sizeof(ret->stats));
1919
1920         ret->references=1;
1921         ret->quiet_shutdown=0;
1922
1923 /*      ret->cipher=NULL;*/
1924 /*      ret->s2->challenge=NULL;
1925         ret->master_key=NULL;
1926         ret->key_arg=NULL;
1927         ret->s2->conn_id=NULL; */
1928
1929         ret->info_callback=NULL;
1930
1931         ret->app_verify_callback=0;
1932         ret->app_verify_arg=NULL;
1933
1934         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1935         ret->read_ahead=0;
1936         ret->msg_callback=0;
1937         ret->msg_callback_arg=NULL;
1938         ret->verify_mode=SSL_VERIFY_NONE;
1939 #if 0
1940         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1941 #endif
1942         ret->sid_ctx_length=0;
1943         ret->default_verify_callback=NULL;
1944         if ((ret->cert=ssl_cert_new()) == NULL)
1945                 goto err;
1946
1947         ret->default_passwd_callback=0;
1948         ret->default_passwd_callback_userdata=NULL;
1949         ret->client_cert_cb=0;
1950         ret->app_gen_cookie_cb=0;
1951         ret->app_verify_cookie_cb=0;
1952
1953         ret->sessions=lh_SSL_SESSION_new();
1954         if (ret->sessions == NULL) goto err;
1955         ret->cert_store=X509_STORE_new();
1956         if (ret->cert_store == NULL) goto err;
1957
1958         ssl_create_cipher_list(ret->method,
1959                 &ret->cipher_list,&ret->cipher_list_by_id,
1960                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1961         if (ret->cipher_list == NULL
1962             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1963                 {
1964                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1965                 goto err2;
1966                 }
1967
1968         ret->param = X509_VERIFY_PARAM_new();
1969         if (!ret->param)
1970                 goto err;
1971
1972         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1973                 {
1974                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1975                 goto err2;
1976                 }
1977         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1978                 {
1979                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1980                 goto err2;
1981                 }
1982         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1983                 {
1984                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1985                 goto err2;
1986                 }
1987
1988         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1989                 goto err;
1990
1991         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1992
1993         ret->extra_certs=NULL;
1994         /* No compression for DTLS */
1995         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
1996                 ret->comp_methods=SSL_COMP_get_compression_methods();
1997
1998         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1999
2000 #ifndef OPENSSL_NO_TLSEXT
2001         ret->tlsext_servername_callback = 0;
2002         ret->tlsext_servername_arg = NULL;
2003         /* Setup RFC4507 ticket keys */
2004         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
2005                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
2006                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
2007                 ret->options |= SSL_OP_NO_TICKET;
2008
2009         ret->tlsext_status_cb = 0;
2010         ret->tlsext_status_arg = NULL;
2011
2012 # ifndef OPENSSL_NO_NEXTPROTONEG
2013         ret->next_protos_advertised_cb = 0;
2014         ret->next_proto_select_cb = 0;
2015 # endif
2016 #endif
2017 #ifndef OPENSSL_NO_PSK
2018         ret->psk_identity_hint=NULL;
2019         ret->psk_client_callback=NULL;
2020         ret->psk_server_callback=NULL;
2021 #endif
2022 #ifndef OPENSSL_NO_SRP
2023         SSL_CTX_SRP_CTX_init(ret);
2024 #endif
2025 #ifndef OPENSSL_NO_BUF_FREELISTS
2026         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
2027         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2028         if (!ret->rbuf_freelist)
2029                 goto err;
2030         ret->rbuf_freelist->chunklen = 0;
2031         ret->rbuf_freelist->len = 0;
2032         ret->rbuf_freelist->head = NULL;
2033         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2034         if (!ret->wbuf_freelist)
2035                 {
2036                 OPENSSL_free(ret->rbuf_freelist);
2037                 goto err;
2038                 }
2039         ret->wbuf_freelist->chunklen = 0;
2040         ret->wbuf_freelist->len = 0;
2041         ret->wbuf_freelist->head = NULL;
2042 #endif
2043 #ifndef OPENSSL_NO_ENGINE
2044         ret->client_cert_engine = NULL;
2045 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2046 #define eng_strx(x)     #x
2047 #define eng_str(x)      eng_strx(x)
2048         /* Use specific client engine automatically... ignore errors */
2049         {
2050         ENGINE *eng;
2051         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2052         if (!eng)
2053                 {
2054                 ERR_clear_error();
2055                 ENGINE_load_builtin_engines();
2056                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2057                 }
2058         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2059                 ERR_clear_error();
2060         }
2061 #endif
2062 #endif
2063         /* Default is to connect to non-RI servers. When RI is more widely
2064          * deployed might change this.
2065          */
2066         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2067
2068         return(ret);
2069 err:
2070         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2071 err2:
2072         if (ret != NULL) SSL_CTX_free(ret);
2073         return(NULL);
2074         }
2075
2076 #if 0
2077 static void SSL_COMP_free(SSL_COMP *comp)
2078     { OPENSSL_free(comp); }
2079 #endif
2080
2081 #ifndef OPENSSL_NO_BUF_FREELISTS
2082 static void
2083 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2084         {
2085         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2086         for (ent = list->head; ent; ent = next)
2087                 {
2088                 next = ent->next;
2089                 OPENSSL_free(ent);
2090                 }
2091         OPENSSL_free(list);
2092         }
2093 #endif
2094
2095 void SSL_CTX_free(SSL_CTX *a)
2096         {
2097         int i;
2098
2099         if (a == NULL) return;
2100
2101         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2102 #ifdef REF_PRINT
2103         REF_PRINT("SSL_CTX",a);
2104 #endif
2105         if (i > 0) return;
2106 #ifdef REF_CHECK
2107         if (i < 0)
2108                 {
2109                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2110                 abort(); /* ok */
2111                 }
2112 #endif
2113
2114         if (a->param)
2115                 X509_VERIFY_PARAM_free(a->param);
2116
2117         /*
2118          * Free internal session cache. However: the remove_cb() may reference
2119          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2120          * after the sessions were flushed.
2121          * As the ex_data handling routines might also touch the session cache,
2122          * the most secure solution seems to be: empty (flush) the cache, then
2123          * free ex_data, then finally free the cache.
2124          * (See ticket [openssl.org #212].)
2125          */
2126         if (a->sessions != NULL)
2127                 SSL_CTX_flush_sessions(a,0);
2128
2129         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2130
2131         if (a->sessions != NULL)
2132                 lh_SSL_SESSION_free(a->sessions);
2133
2134         if (a->cert_store != NULL)
2135                 X509_STORE_free(a->cert_store);
2136         if (a->cipher_list != NULL)
2137                 sk_SSL_CIPHER_free(a->cipher_list);
2138         if (a->cipher_list_by_id != NULL)
2139                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2140         if (a->cert != NULL)
2141                 ssl_cert_free(a->cert);
2142         if (a->client_CA != NULL)
2143                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2144         if (a->extra_certs != NULL)
2145                 sk_X509_pop_free(a->extra_certs,X509_free);
2146 #if 0 /* This should never be done, since it removes a global database */
2147         if (a->comp_methods != NULL)
2148                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2149 #else
2150         a->comp_methods = NULL;
2151 #endif
2152
2153         if (a->srtp_profiles)
2154                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2155
2156 #ifndef OPENSSL_NO_PSK
2157         if (a->psk_identity_hint)
2158                 OPENSSL_free(a->psk_identity_hint);
2159 #endif
2160 #ifndef OPENSSL_NO_SRP
2161         SSL_CTX_SRP_CTX_free(a);
2162 #endif
2163 #ifndef OPENSSL_NO_ENGINE
2164         if (a->client_cert_engine)
2165                 ENGINE_finish(a->client_cert_engine);
2166 #endif
2167
2168 #ifndef OPENSSL_NO_BUF_FREELISTS
2169         if (a->wbuf_freelist)
2170                 ssl_buf_freelist_free(a->wbuf_freelist);
2171         if (a->rbuf_freelist)
2172                 ssl_buf_freelist_free(a->rbuf_freelist);
2173 #endif
2174 #ifndef OPENSSL_NO_TLSEXT
2175 # ifndef OPENSSL_NO_EC
2176         if (a->tlsext_ecpointformatlist)
2177                 OPENSSL_free(a->tlsext_ecpointformatlist);
2178         if (a->tlsext_ellipticcurvelist)
2179                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2180 # endif /* OPENSSL_NO_EC */
2181         if (a->alpn_client_proto_list != NULL)
2182                 OPENSSL_free(a->alpn_client_proto_list);
2183 #endif
2184
2185         OPENSSL_free(a);
2186         }
2187
2188 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2189         {
2190         ctx->default_passwd_callback=cb;
2191         }
2192
2193 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2194         {
2195         ctx->default_passwd_callback_userdata=u;
2196         }
2197
2198 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2199         {
2200         ctx->app_verify_callback=cb;
2201         ctx->app_verify_arg=arg;
2202         }
2203
2204 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2205         {
2206         ctx->verify_mode=mode;
2207         ctx->default_verify_callback=cb;
2208         }
2209
2210 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2211         {
2212         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2213         }
2214
2215 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2216         {
2217         ssl_cert_set_cert_cb(c->cert, cb, arg);
2218         }
2219
2220 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2221         {
2222         ssl_cert_set_cert_cb(s->cert, cb, arg);
2223         }
2224
2225 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2226         {
2227         CERT_PKEY *cpk;
2228         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2229         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2230         int rsa_tmp_export,dh_tmp_export,kl;
2231         unsigned long mask_k,mask_a,emask_k,emask_a;
2232 #ifndef OPENSSL_NO_ECDSA
2233         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2234 #endif
2235 #ifndef OPENSSL_NO_ECDH
2236         int have_ecdh_tmp, ecdh_ok;
2237 #endif
2238 #ifndef OPENSSL_NO_EC
2239         X509 *x = NULL;
2240         EVP_PKEY *ecc_pkey = NULL;
2241         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2242 #endif
2243         if (c == NULL) return;
2244
2245         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2246
2247 #ifndef OPENSSL_NO_RSA
2248         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2249         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2250                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2251 #else
2252         rsa_tmp=rsa_tmp_export=0;
2253 #endif
2254 #ifndef OPENSSL_NO_DH
2255         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
2256         dh_tmp_export= !c->dh_tmp_auto && (c->dh_tmp_cb != NULL ||
2257                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2258 #else
2259         dh_tmp=dh_tmp_export=0;
2260 #endif
2261
2262 #ifndef OPENSSL_NO_ECDH
2263         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2264 #endif
2265         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2266         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2267         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2268         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2269         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2270         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2271         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2272         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2273         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2274         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2275         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2276 /* FIX THIS EAY EAY EAY */
2277         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2278         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2279         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2280 #ifndef OPENSSL_NO_EC
2281         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2282 #endif
2283         mask_k=0;
2284         mask_a=0;
2285         emask_k=0;
2286         emask_a=0;
2287
2288
2289
2290 #ifdef CIPHER_DEBUG
2291         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2292                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2293                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2294 #endif
2295
2296         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2297         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2298                 mask_k |= SSL_kGOST;
2299                 mask_a |= SSL_aGOST01;
2300         }
2301         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2302         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2303                 mask_k |= SSL_kGOST;
2304                 mask_a |= SSL_aGOST94;
2305         }
2306
2307         if (rsa_enc || (rsa_tmp && rsa_sign))
2308                 mask_k|=SSL_kRSA;
2309         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2310                 emask_k|=SSL_kRSA;
2311
2312 #if 0
2313         /* The match needs to be both kDHE and aRSA or aDSA, so don't worry */
2314         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2315                 (rsa_enc || rsa_sign || dsa_sign))
2316                 mask_k|=SSL_kDHE;
2317         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2318                 (rsa_enc || rsa_sign || dsa_sign))
2319                 emask_k|=SSL_kDHE;
2320 #endif
2321
2322         if (dh_tmp_export)
2323                 emask_k|=SSL_kDHE;
2324
2325         if (dh_tmp)
2326                 mask_k|=SSL_kDHE;
2327
2328         if (dh_rsa) mask_k|=SSL_kDHr;
2329         if (dh_rsa_export) emask_k|=SSL_kDHr;
2330
2331         if (dh_dsa) mask_k|=SSL_kDHd;
2332         if (dh_dsa_export) emask_k|=SSL_kDHd;
2333
2334         if (emask_k & (SSL_kDHr|SSL_kDHd))
2335                 mask_a |= SSL_aDH;
2336
2337         if (rsa_enc || rsa_sign)
2338                 {
2339                 mask_a|=SSL_aRSA;
2340                 emask_a|=SSL_aRSA;
2341                 }
2342
2343         if (dsa_sign)
2344                 {
2345                 mask_a|=SSL_aDSS;
2346                 emask_a|=SSL_aDSS;
2347                 }
2348
2349         mask_a|=SSL_aNULL;
2350         emask_a|=SSL_aNULL;
2351
2352 #ifndef OPENSSL_NO_KRB5
2353         mask_k|=SSL_kKRB5;
2354         mask_a|=SSL_aKRB5;
2355         emask_k|=SSL_kKRB5;
2356         emask_a|=SSL_aKRB5;
2357 #endif
2358
2359         /* An ECC certificate may be usable for ECDH and/or
2360          * ECDSA cipher suites depending on the key usage extension.
2361          */
2362 #ifndef OPENSSL_NO_EC
2363         if (have_ecc_cert)
2364                 {
2365                 cpk = &c->pkeys[SSL_PKEY_ECC];
2366                 x = cpk->x509;
2367                 /* This call populates extension flags (ex_flags) */
2368                 X509_check_purpose(x, -1, 0);
2369                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2370                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2371                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2372                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2373                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2374                         ecdsa_ok = 0;
2375                 ecc_pkey = X509_get_pubkey(x);
2376                 ecc_pkey_size = (ecc_pkey != NULL) ?
2377                     EVP_PKEY_bits(ecc_pkey) : 0;
2378                 EVP_PKEY_free(ecc_pkey);
2379                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2380                         {
2381                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2382                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2383                         }
2384 #ifndef OPENSSL_NO_ECDH
2385                 if (ecdh_ok)
2386                         {
2387
2388                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2389                                 {
2390                                 mask_k|=SSL_kECDHr;
2391                                 mask_a|=SSL_aECDH;
2392                                 if (ecc_pkey_size <= 163)
2393                                         {
2394                                         emask_k|=SSL_kECDHr;
2395                                         emask_a|=SSL_aECDH;
2396                                         }
2397                                 }
2398
2399                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2400                                 {
2401                                 mask_k|=SSL_kECDHe;
2402                                 mask_a|=SSL_aECDH;
2403                                 if (ecc_pkey_size <= 163)
2404                                         {
2405                                         emask_k|=SSL_kECDHe;
2406                                         emask_a|=SSL_aECDH;
2407                                         }
2408                                 }
2409                         }
2410 #endif
2411 #ifndef OPENSSL_NO_ECDSA
2412                 if (ecdsa_ok)
2413                         {
2414                         mask_a|=SSL_aECDSA;
2415                         emask_a|=SSL_aECDSA;
2416                         }
2417 #endif
2418                 }
2419 #endif
2420
2421 #ifndef OPENSSL_NO_ECDH
2422         if (have_ecdh_tmp)
2423                 {
2424                 mask_k|=SSL_kECDHE;
2425                 emask_k|=SSL_kECDHE;
2426                 }
2427 #endif
2428
2429 #ifndef OPENSSL_NO_PSK
2430         mask_k |= SSL_kPSK;
2431         mask_a |= SSL_aPSK;
2432         emask_k |= SSL_kPSK;
2433         emask_a |= SSL_aPSK;
2434 #endif
2435
2436         c->mask_k=mask_k;
2437         c->mask_a=mask_a;
2438         c->export_mask_k=emask_k;
2439         c->export_mask_a=emask_a;
2440         c->valid=1;
2441         }
2442
2443 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2444 #define ku_reject(x, usage) \
2445         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2446
2447 #ifndef OPENSSL_NO_EC
2448
2449 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2450         {
2451         unsigned long alg_k, alg_a;
2452         EVP_PKEY *pkey = NULL;
2453         int keysize = 0;
2454         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2455         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2456
2457         alg_k = cs->algorithm_mkey;
2458         alg_a = cs->algorithm_auth;
2459
2460         if (SSL_C_IS_EXPORT(cs))
2461                 {
2462                 /* ECDH key length in export ciphers must be <= 163 bits */
2463                 pkey = X509_get_pubkey(x);
2464                 if (pkey == NULL) return 0;
2465                 keysize = EVP_PKEY_bits(pkey);
2466                 EVP_PKEY_free(pkey);
2467                 if (keysize > 163) return 0;
2468                 }
2469
2470         /* This call populates the ex_flags field correctly */
2471         X509_check_purpose(x, -1, 0);
2472         if ((x->sig_alg) && (x->sig_alg->algorithm))
2473                 {
2474                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2475                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2476                 }
2477         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2478                 {
2479                 /* key usage, if present, must allow key agreement */
2480                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2481                         {
2482                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2483                         return 0;
2484                         }
2485                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2486                         {
2487                         /* signature alg must be ECDSA */
2488                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2489                                 {
2490                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2491                                 return 0;
2492                                 }
2493                         }
2494                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2495                         {
2496                         /* signature alg must be RSA */
2497
2498                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2499                                 {
2500                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2501                                 return 0;
2502                                 }
2503                         }
2504                 }
2505         if (alg_a & SSL_aECDSA)
2506                 {
2507                 /* key usage, if present, must allow signing */
2508                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2509                         {
2510                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2511                         return 0;
2512                         }
2513                 }
2514
2515         return 1;  /* all checks are ok */
2516         }
2517
2518 #endif
2519
2520 static int ssl_get_server_cert_index(const SSL *s)
2521         {
2522         int idx;
2523         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2524         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2525                 idx = SSL_PKEY_RSA_SIGN;
2526         if (idx == -1)
2527                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2528         return idx;
2529         }
2530
2531 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2532         {
2533         CERT *c;
2534         int i;
2535
2536         c = s->cert;
2537         if (!s->s3 || !s->s3->tmp.new_cipher)
2538                 return NULL;
2539         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2540
2541 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2542         /* Broken protocol test: return last used certificate: which may
2543          * mismatch the one expected.
2544          */
2545         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2546                 return c->key;
2547 #endif
2548
2549         i = ssl_get_server_cert_index(s);
2550
2551         /* This may or may not be an error. */
2552         if (i < 0)
2553                 return NULL;
2554
2555         /* May be NULL. */
2556         return &c->pkeys[i];
2557         }
2558
2559 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2560         {
2561         unsigned long alg_a;
2562         CERT *c;
2563         int idx = -1;
2564
2565         alg_a = cipher->algorithm_auth;
2566         c=s->cert;
2567
2568 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2569         /* Broken protocol test: use last key: which may
2570          * mismatch the one expected.
2571          */
2572         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2573                 idx = c->key - c->pkeys;
2574         else
2575 #endif
2576
2577         if ((alg_a & SSL_aDSS) &&
2578                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2579                 idx = SSL_PKEY_DSA_SIGN;
2580         else if (alg_a & SSL_aRSA)
2581                 {
2582                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2583                         idx = SSL_PKEY_RSA_SIGN;
2584                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2585                         idx = SSL_PKEY_RSA_ENC;
2586                 }
2587         else if ((alg_a & SSL_aECDSA) &&
2588                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2589                 idx = SSL_PKEY_ECC;
2590         if (idx == -1)
2591                 {
2592                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2593                 return(NULL);
2594                 }
2595         if (pmd)
2596                 *pmd = c->pkeys[idx].digest;
2597         return c->pkeys[idx].privatekey;
2598         }
2599
2600 #ifndef OPENSSL_NO_TLSEXT
2601 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2602                                    size_t *serverinfo_length)
2603         {
2604         CERT *c = NULL;
2605         int i = 0;
2606         *serverinfo_length = 0;
2607
2608         c = s->cert;
2609         i = ssl_get_server_cert_index(s);
2610
2611         if (i == -1)
2612                 return 0;
2613         if (c->pkeys[i].serverinfo == NULL)
2614                 return 0;
2615
2616         *serverinfo = c->pkeys[i].serverinfo;
2617         *serverinfo_length = c->pkeys[i].serverinfo_length;
2618         return 1;
2619         }
2620 #endif
2621
2622 void ssl_update_cache(SSL *s,int mode)
2623         {
2624         int i;
2625
2626         /* If the session_id_length is 0, we are not supposed to cache it,
2627          * and it would be rather hard to do anyway :-) */
2628         if (s->session->session_id_length == 0) return;
2629
2630         i=s->session_ctx->session_cache_mode;
2631         if ((i & mode) && (!s->hit)
2632                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2633                     || SSL_CTX_add_session(s->session_ctx,s->session))
2634                 && (s->session_ctx->new_session_cb != NULL))
2635                 {
2636                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2637                 if (!s->session_ctx->new_session_cb(s,s->session))
2638                         SSL_SESSION_free(s->session);
2639                 }
2640
2641         /* auto flush every 255 connections */
2642         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2643                 ((i & mode) == mode))
2644                 {
2645                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2646                         ?s->session_ctx->stats.sess_connect_good
2647                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2648                         {
2649                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2650                         }
2651                 }
2652         }
2653
2654 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2655         {
2656         return ctx->method;
2657         }
2658
2659 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2660         {
2661         return(s->method);
2662         }
2663
2664 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2665         {
2666         int conn= -1;
2667         int ret=1;
2668
2669         if (s->method != meth)
2670                 {
2671                 if (s->handshake_func != NULL)
2672                         conn=(s->handshake_func == s->method->ssl_connect);
2673
2674                 if (s->method->version == meth->version)
2675                         s->method=meth;
2676                 else
2677                         {
2678                         s->method->ssl_free(s);
2679                         s->method=meth;
2680                         ret=s->method->ssl_new(s);
2681                         }
2682
2683                 if (conn == 1)
2684                         s->handshake_func=meth->ssl_connect;
2685                 else if (conn == 0)
2686                         s->handshake_func=meth->ssl_accept;
2687                 }
2688         return(ret);
2689         }
2690
2691 int SSL_get_error(const SSL *s,int i)
2692         {
2693         int reason;
2694         unsigned long l;
2695         BIO *bio;
2696
2697         if (i > 0) return(SSL_ERROR_NONE);
2698
2699         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2700          * etc, where we do encode the error */
2701         if ((l=ERR_peek_error()) != 0)
2702                 {
2703                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2704                         return(SSL_ERROR_SYSCALL);
2705                 else
2706                         return(SSL_ERROR_SSL);
2707                 }
2708
2709         if ((i < 0) && SSL_want_read(s))
2710                 {
2711                 bio=SSL_get_rbio(s);
2712                 if (BIO_should_read(bio))
2713                         return(SSL_ERROR_WANT_READ);
2714                 else if (BIO_should_write(bio))
2715                         /* This one doesn't make too much sense ... We never try
2716                          * to write to the rbio, and an application program where
2717                          * rbio and wbio are separate couldn't even know what it
2718                          * should wait for.
2719                          * However if we ever set s->rwstate incorrectly
2720                          * (so that we have SSL_want_read(s) instead of
2721                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2722                          * this test works around that bug; so it might be safer
2723                          * to keep it. */
2724                         return(SSL_ERROR_WANT_WRITE);
2725                 else if (BIO_should_io_special(bio))
2726                         {
2727                         reason=BIO_get_retry_reason(bio);
2728                         if (reason == BIO_RR_CONNECT)
2729                                 return(SSL_ERROR_WANT_CONNECT);
2730                         else if (reason == BIO_RR_ACCEPT)
2731                                 return(SSL_ERROR_WANT_ACCEPT);
2732                         else
2733                                 return(SSL_ERROR_SYSCALL); /* unknown */
2734                         }
2735                 }
2736
2737         if ((i < 0) && SSL_want_write(s))
2738                 {
2739                 bio=SSL_get_wbio(s);
2740                 if (BIO_should_write(bio))
2741                         return(SSL_ERROR_WANT_WRITE);
2742                 else if (BIO_should_read(bio))
2743                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2744                         return(SSL_ERROR_WANT_READ);
2745                 else if (BIO_should_io_special(bio))
2746                         {
2747                         reason=BIO_get_retry_reason(bio);
2748                         if (reason == BIO_RR_CONNECT)
2749                                 return(SSL_ERROR_WANT_CONNECT);
2750                         else if (reason == BIO_RR_ACCEPT)
2751                                 return(SSL_ERROR_WANT_ACCEPT);
2752                         else
2753                                 return(SSL_ERROR_SYSCALL);
2754                         }
2755                 }
2756         if ((i < 0) && SSL_want_x509_lookup(s))
2757                 {
2758                 return(SSL_ERROR_WANT_X509_LOOKUP);
2759                 }
2760
2761         if (i == 0)
2762                 {
2763                 if (s->version == SSL2_VERSION)
2764                         {
2765                         /* assume it is the socket being closed */
2766                         return(SSL_ERROR_ZERO_RETURN);
2767                         }
2768                 else
2769                         {
2770                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2771                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2772                                 return(SSL_ERROR_ZERO_RETURN);
2773                         }
2774                 }
2775         return(SSL_ERROR_SYSCALL);
2776         }
2777
2778 int SSL_do_handshake(SSL *s)
2779         {
2780         int ret=1;
2781
2782         if (s->handshake_func == NULL)
2783                 {
2784                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2785                 return(-1);
2786                 }
2787
2788         s->method->ssl_renegotiate_check(s);
2789
2790         if (SSL_in_init(s) || SSL_in_before(s))
2791                 {
2792                 ret=s->handshake_func(s);
2793                 }
2794         return(ret);
2795         }
2796
2797 /* For the next 2 functions, SSL_clear() sets shutdown and so
2798  * one of these calls will reset it */
2799 void SSL_set_accept_state(SSL *s)
2800         {
2801         s->server=1;
2802         s->shutdown=0;
2803         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2804         s->handshake_func=s->method->ssl_accept;
2805         /* clear the current cipher */
2806         ssl_clear_cipher_ctx(s);
2807         ssl_clear_hash_ctx(&s->read_hash);
2808         ssl_clear_hash_ctx(&s->write_hash);
2809         }
2810
2811 void SSL_set_connect_state(SSL *s)
2812         {
2813         s->server=0;
2814         s->shutdown=0;
2815         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2816         s->handshake_func=s->method->ssl_connect;
2817         /* clear the current cipher */
2818         ssl_clear_cipher_ctx(s);
2819         ssl_clear_hash_ctx(&s->read_hash);
2820         ssl_clear_hash_ctx(&s->write_hash);
2821         }
2822
2823 int ssl_undefined_function(SSL *s)
2824         {
2825         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2826         return(0);
2827         }
2828
2829 int ssl_undefined_void_function(void)
2830         {
2831         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2832         return(0);
2833         }
2834
2835 int ssl_undefined_const_function(const SSL *s)
2836         {
2837         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2838         return(0);
2839         }
2840
2841 SSL_METHOD *ssl_bad_method(int ver)
2842         {
2843         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2844         return(NULL);
2845         }
2846
2847 const char *SSL_get_version(const SSL *s)
2848         {
2849         if (s->version == TLS1_2_VERSION)
2850                 return("TLSv1.2");
2851         else if (s->version == TLS1_1_VERSION)
2852                 return("TLSv1.1");
2853         else if (s->version == TLS1_VERSION)
2854                 return("TLSv1");
2855         else if (s->version == SSL3_VERSION)
2856                 return("SSLv3");
2857         else if (s->version == SSL2_VERSION)
2858                 return("SSLv2");
2859         else
2860                 return("unknown");
2861         }
2862
2863 SSL *SSL_dup(SSL *s)
2864         {
2865         STACK_OF(X509_NAME) *sk;
2866         X509_NAME *xn;
2867         SSL *ret;
2868         int i;
2869
2870         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2871             return(NULL);
2872
2873         ret->version = s->version;
2874         ret->type = s->type;
2875         ret->method = s->method;
2876
2877         if (s->session != NULL)
2878                 {
2879                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2880                 SSL_copy_session_id(ret,s);
2881                 }
2882         else
2883                 {
2884                 /* No session has been established yet, so we have to expect
2885                  * that s->cert or ret->cert will be changed later --
2886                  * they should not both point to the same object,
2887                  * and thus we can't use SSL_copy_session_id. */
2888
2889                 ret->method->ssl_free(ret);
2890                 ret->method = s->method;
2891                 ret->method->ssl_new(ret);
2892
2893                 if (s->cert != NULL)
2894                         {
2895                         if (ret->cert != NULL)
2896                                 {
2897                                 ssl_cert_free(ret->cert);
2898                                 }
2899                         ret->cert = ssl_cert_dup(s->cert);
2900                         if (ret->cert == NULL)
2901                                 goto err;
2902                         }
2903
2904                 SSL_set_session_id_context(ret,
2905                         s->sid_ctx, s->sid_ctx_length);
2906                 }
2907
2908         ret->options=s->options;
2909         ret->mode=s->mode;
2910         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2911         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2912         ret->msg_callback = s->msg_callback;
2913         ret->msg_callback_arg = s->msg_callback_arg;
2914         SSL_set_verify(ret,SSL_get_verify_mode(s),
2915                 SSL_get_verify_callback(s));
2916         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2917         ret->generate_session_id = s->generate_session_id;
2918
2919         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2920
2921         ret->debug=s->debug;
2922
2923         /* copy app data, a little dangerous perhaps */
2924         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2925                 goto err;
2926
2927         /* setup rbio, and wbio */
2928         if (s->rbio != NULL)
2929                 {
2930                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2931                         goto err;
2932                 }
2933         if (s->wbio != NULL)
2934                 {
2935                 if (s->wbio != s->rbio)
2936                         {
2937                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2938                                 goto err;
2939                         }
2940                 else
2941                         ret->wbio=ret->rbio;
2942                 }
2943         ret->rwstate = s->rwstate;
2944         ret->in_handshake = s->in_handshake;
2945         ret->handshake_func = s->handshake_func;
2946         ret->server = s->server;
2947         ret->renegotiate = s->renegotiate;
2948         ret->new_session = s->new_session;
2949         ret->quiet_shutdown = s->quiet_shutdown;
2950         ret->shutdown=s->shutdown;
2951         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2952         ret->rstate=s->rstate;
2953         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2954         ret->hit=s->hit;
2955
2956         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2957
2958         /* dup the cipher_list and cipher_list_by_id stacks */
2959         if (s->cipher_list != NULL)
2960                 {
2961                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2962                         goto err;
2963                 }
2964         if (s->cipher_list_by_id != NULL)
2965                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2966                         == NULL)
2967                         goto err;
2968
2969         /* Dup the client_CA list */
2970         if (s->client_CA != NULL)
2971                 {
2972                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2973                 ret->client_CA=sk;
2974                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2975                         {
2976                         xn=sk_X509_NAME_value(sk,i);
2977                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2978                                 {
2979                                 X509_NAME_free(xn);
2980                                 goto err;
2981                                 }
2982                         }
2983                 }
2984
2985         if (0)
2986                 {
2987 err:
2988                 if (ret != NULL) SSL_free(ret);
2989                 ret=NULL;
2990                 }
2991         return(ret);
2992         }
2993
2994 void ssl_clear_cipher_ctx(SSL *s)
2995         {
2996         if (s->enc_read_ctx != NULL)
2997                 {
2998                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2999                 OPENSSL_free(s->enc_read_ctx);
3000                 s->enc_read_ctx=NULL;
3001                 }
3002         if (s->enc_write_ctx != NULL)
3003                 {
3004                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
3005                 OPENSSL_free(s->enc_write_ctx);
3006                 s->enc_write_ctx=NULL;
3007                 }
3008 #ifndef OPENSSL_NO_COMP
3009         if (s->expand != NULL)
3010                 {
3011                 COMP_CTX_free(s->expand);
3012                 s->expand=NULL;
3013                 }
3014         if (s->compress != NULL)
3015                 {
3016                 COMP_CTX_free(s->compress);
3017                 s->compress=NULL;
3018                 }
3019 #endif
3020         }
3021
3022 X509 *SSL_get_certificate(const SSL *s)
3023         {
3024         if (s->cert != NULL)
3025                 return(s->cert->key->x509);
3026         else
3027                 return(NULL);
3028         }
3029
3030 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3031         {
3032         if (s->cert != NULL)
3033                 return(s->cert->key->privatekey);
3034         else
3035                 return(NULL);
3036         }
3037
3038 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3039         {
3040         if (ctx->cert != NULL)
3041                 return ctx->cert->key->x509;
3042         else
3043                 return NULL;
3044         }
3045
3046 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3047         {
3048         if (ctx->cert != NULL)
3049                 return ctx->cert->key->privatekey;
3050         else
3051                 return NULL ;
3052         }
3053
3054 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3055         {
3056         if ((s->session != NULL) && (s->session->cipher != NULL))
3057                 return(s->session->cipher);
3058         return(NULL);
3059         }
3060 #ifdef OPENSSL_NO_COMP
3061 const void *SSL_get_current_compression(SSL *s)
3062         {
3063         return NULL;
3064         }
3065 const void *SSL_get_current_expansion(SSL *s)
3066         {
3067         return NULL;
3068         }
3069 #else
3070
3071 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3072         {
3073         if (s->compress != NULL)
3074                 return(s->compress->meth);
3075         return(NULL);
3076         }
3077
3078 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3079         {
3080         if (s->expand != NULL)
3081                 return(s->expand->meth);
3082         return(NULL);
3083         }
3084 #endif
3085
3086 int ssl_init_wbio_buffer(SSL *s,int push)
3087         {
3088         BIO *bbio;
3089
3090         if (s->bbio == NULL)
3091                 {
3092                 bbio=BIO_new(BIO_f_buffer());
3093                 if (bbio == NULL) return(0);
3094                 s->bbio=bbio;
3095                 }
3096         else
3097                 {
3098                 bbio=s->bbio;
3099                 if (s->bbio == s->wbio)
3100                         s->wbio=BIO_pop(s->wbio);
3101                 }
3102         (void)BIO_reset(bbio);
3103 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3104         if (!BIO_set_read_buffer_size(bbio,1))
3105                 {
3106                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3107                 return(0);
3108                 }
3109         if (push)
3110                 {
3111                 if (s->wbio != bbio)
3112                         s->wbio=BIO_push(bbio,s->wbio);
3113                 }
3114         else
3115                 {
3116                 if (s->wbio == bbio)
3117                         s->wbio=BIO_pop(bbio);
3118                 }
3119         return(1);
3120         }
3121
3122 void ssl_free_wbio_buffer(SSL *s)
3123         {
3124         if (s->bbio == NULL) return;
3125
3126         if (s->bbio == s->wbio)
3127                 {
3128                 /* remove buffering */
3129                 s->wbio=BIO_pop(s->wbio);
3130 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3131                 assert(s->wbio != NULL);
3132 #endif
3133         }
3134         BIO_free(s->bbio);
3135         s->bbio=NULL;
3136         }
3137
3138 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3139         {
3140         ctx->quiet_shutdown=mode;
3141         }
3142
3143 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3144         {
3145         return(ctx->quiet_shutdown);
3146         }
3147
3148 void SSL_set_quiet_shutdown(SSL *s,int mode)
3149         {
3150         s->quiet_shutdown=mode;
3151         }
3152
3153 int SSL_get_quiet_shutdown(const SSL *s)
3154         {
3155         return(s->quiet_shutdown);
3156         }
3157
3158 void SSL_set_shutdown(SSL *s,int mode)
3159         {
3160         s->shutdown=mode;
3161         }
3162
3163 int SSL_get_shutdown(const SSL *s)
3164         {
3165         return(s->shutdown);
3166         }
3167
3168 int SSL_version(const SSL *s)
3169         {
3170         return(s->version);
3171         }
3172
3173 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3174         {
3175         return(ssl->ctx);
3176         }
3177
3178 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3179         {
3180         if (ssl->ctx == ctx)
3181                 return ssl->ctx;
3182 #ifndef OPENSSL_NO_TLSEXT
3183         if (ctx == NULL)
3184                 ctx = ssl->initial_ctx;
3185 #endif
3186         if (ssl->cert != NULL)
3187                 ssl_cert_free(ssl->cert);
3188         ssl->cert = ssl_cert_dup(ctx->cert);
3189         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3190         if (ssl->ctx != NULL)
3191                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3192         ssl->ctx = ctx;
3193         return(ssl->ctx);
3194         }
3195
3196 #ifndef OPENSSL_NO_STDIO
3197 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3198         {
3199         return(X509_STORE_set_default_paths(ctx->cert_store));
3200         }
3201
3202 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3203                 const char *CApath)
3204         {
3205         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3206         }
3207 #endif
3208
3209 void SSL_set_info_callback(SSL *ssl,
3210         void (*cb)(const SSL *ssl,int type,int val))
3211         {
3212         ssl->info_callback=cb;
3213         }
3214
3215 /* One compiler (Diab DCC) doesn't like argument names in returned
3216    function pointer.  */
3217 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3218         {
3219         return ssl->info_callback;
3220         }
3221
3222 int SSL_state(const SSL *ssl)
3223         {
3224         return(ssl->state);
3225         }
3226
3227 void SSL_set_state(SSL *ssl, int state)
3228         {
3229         ssl->state = state;
3230         }
3231
3232 void SSL_set_verify_result(SSL *ssl,long arg)
3233         {
3234         ssl->verify_result=arg;
3235         }
3236
3237 long SSL_get_verify_result(const SSL *ssl)
3238         {
3239         return(ssl->verify_result);
3240         }
3241
3242 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3243                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3244         {
3245         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3246                                 new_func, dup_func, free_func);
3247         }
3248
3249 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3250         {
3251         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3252         }
3253
3254 void *SSL_get_ex_data(const SSL *s,int idx)
3255         {
3256         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3257         }
3258
3259 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3260                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3261         {
3262         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3263                                 new_func, dup_func, free_func);
3264         }
3265
3266 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3267         {
3268         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3269         }
3270
3271 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3272         {
3273         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3274         }
3275
3276 int ssl_ok(SSL *s)
3277         {
3278         return(1);
3279         }
3280
3281 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3282         {
3283         return(ctx->cert_store);
3284         }
3285
3286 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3287         {
3288         if (ctx->cert_store != NULL)
3289                 X509_STORE_free(ctx->cert_store);
3290         ctx->cert_store=store;
3291         }
3292
3293 int SSL_want(const SSL *s)
3294         {
3295         return(s->rwstate);
3296         }
3297
3298 /*!
3299  * \brief Set the callback for generating temporary RSA keys.
3300  * \param ctx the SSL context.
3301  * \param cb the callback
3302  */
3303
3304 #ifndef OPENSSL_NO_RSA
3305 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3306                                                           int is_export,
3307                                                           int keylength))
3308     {
3309     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3310     }
3311
3312 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3313                                                   int is_export,
3314                                                   int keylength))
3315     {
3316     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3317     }
3318 #endif
3319
3320 #ifdef DOXYGEN
3321 /*!
3322  * \brief The RSA temporary key callback function.
3323  * \param ssl the SSL session.
3324  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3325  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3326  * of the required key in bits.
3327  * \return the temporary RSA key.
3328  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3329  */
3330
3331 RSA *cb(SSL *ssl,int is_export,int keylength)
3332     {}
3333 #endif
3334
3335 /*!
3336  * \brief Set the callback for generating temporary DH keys.
3337  * \param ctx the SSL context.
3338  * \param dh the callback
3339  */
3340
3341 #ifndef OPENSSL_NO_DH
3342 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3343                                                         int keylength))
3344         {
3345         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3346         }
3347
3348 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3349                                                 int keylength))
3350         {
3351         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3352         }
3353 #endif
3354
3355 #ifndef OPENSSL_NO_ECDH
3356 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3357                                                                 int keylength))
3358         {
3359         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3360         }
3361
3362 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3363                                                         int keylength))
3364         {
3365         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3366         }
3367 #endif
3368
3369 #ifndef OPENSSL_NO_PSK
3370 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3371         {
3372         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3373                 {
3374                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3375                 return 0;
3376                 }
3377         if (ctx->psk_identity_hint != NULL)
3378                 OPENSSL_free(ctx->psk_identity_hint);
3379         if (identity_hint != NULL)
3380                 {
3381                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3382                 if (ctx->psk_identity_hint == NULL)
3383                         return 0;
3384                 }
3385         else
3386                 ctx->psk_identity_hint = NULL;
3387         return 1;
3388         }
3389
3390 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3391         {
3392         if (s == NULL)
3393                 return 0;
3394
3395         if (s->session == NULL)
3396                 return 1; /* session not created yet, ignored */
3397
3398         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3399                 {
3400                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3401                 return 0;
3402                 }
3403         if (s->session->psk_identity_hint != NULL)
3404                 OPENSSL_free(s->session->psk_identity_hint);
3405         if (identity_hint != NULL)
3406                 {
3407                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3408                 if (s->session->psk_identity_hint == NULL)
3409                         return 0;
3410                 }
3411         else
3412                 s->session->psk_identity_hint = NULL;
3413         return 1;
3414         }
3415
3416 const char *SSL_get_psk_identity_hint(const SSL *s)
3417         {
3418         if (s == NULL || s->session == NULL)
3419                 return NULL;
3420         return(s->session->psk_identity_hint);
3421         }
3422
3423 const char *SSL_get_psk_identity(const SSL *s)
3424         {
3425         if (s == NULL || s->session == NULL)
3426                 return NULL;
3427         return(s->session->psk_identity);
3428         }
3429
3430 void SSL_set_psk_client_callback(SSL *s,
3431     unsigned int (*cb)(SSL *ssl, const char *hint,
3432                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3433                        unsigned int max_psk_len))
3434         {
3435         s->psk_client_callback = cb;
3436         }
3437
3438 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3439     unsigned int (*cb)(SSL *ssl, const char *hint,
3440                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3441                        unsigned int max_psk_len))
3442         {
3443         ctx->psk_client_callback = cb;
3444         }
3445
3446 void SSL_set_psk_server_callback(SSL *s,
3447     unsigned int (*cb)(SSL *ssl, const char *identity,
3448                        unsigned char *psk, unsigned int max_psk_len))
3449         {
3450         s->psk_server_callback = cb;
3451         }
3452
3453 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3454     unsigned int (*cb)(SSL *ssl, const char *identity,
3455                        unsigned char *psk, unsigned int max_psk_len))
3456         {
3457         ctx->psk_server_callback = cb;
3458         }
3459 #endif
3460
3461 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))
3462         {
3463         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3464         }
3465 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))
3466         {
3467         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3468         }
3469
3470 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3471         int (*cb)(SSL *ssl, int is_forward_secure))
3472         {
3473         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3474                 (void (*)(void))cb);
3475         }
3476 void SSL_set_not_resumable_session_callback(SSL *ssl,
3477         int (*cb)(SSL *ssl, int is_forward_secure))
3478         {
3479         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3480                 (void (*)(void))cb);
3481         }
3482
3483 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3484  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3485  * any. If EVP_MD pointer is passed, initializes ctx with this md
3486  * Returns newly allocated ctx;
3487  */
3488
3489 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3490 {
3491         ssl_clear_hash_ctx(hash);
3492         *hash = EVP_MD_CTX_create();
3493         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3494         return *hash;
3495 }
3496 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3497 {
3498
3499         if (*hash) EVP_MD_CTX_destroy(*hash);
3500         *hash=NULL;
3501 }
3502
3503 void SSL_set_debug(SSL *s, int debug)
3504         {
3505         s->debug = debug;
3506         }
3507
3508 int SSL_cache_hit(SSL *s)
3509         {
3510         return s->hit;
3511         }
3512
3513 int SSL_is_server(SSL *s)
3514         {
3515         return s->server;
3516         }
3517
3518 void SSL_set_security_level(SSL *s, int level)
3519         {
3520         s->cert->sec_level = level;
3521         }
3522
3523 int SSL_get_security_level(const SSL *s)
3524         {
3525         return s->cert->sec_level;
3526         }
3527
3528 void SSL_set_security_callback(SSL *s, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
3529         {
3530         s->cert->sec_cb = cb;
3531         }
3532
3533 int (*SSL_get_security_callback(const SSL *s))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
3534         {
3535         return s->cert->sec_cb;
3536         }
3537
3538 void SSL_set0_security_ex_data(SSL *s, void *ex)
3539         {
3540         s->cert->sec_ex = ex;
3541         }
3542
3543 void *SSL_get0_security_ex_data(const SSL *s)
3544         {
3545         return s->cert->sec_ex;
3546         }
3547
3548 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
3549         {
3550         ctx->cert->sec_level = level;
3551         }
3552
3553 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
3554         {
3555         return ctx->cert->sec_level;
3556         }
3557
3558 void SSL_CTX_set_security_callback(SSL_CTX *ctx, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
3559         {
3560         ctx->cert->sec_cb = cb;
3561         }
3562
3563 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
3564         {
3565         return ctx->cert->sec_cb;
3566         }
3567
3568 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
3569         {
3570         ctx->cert->sec_ex = ex;
3571         }
3572
3573 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
3574         {
3575         return ctx->cert->sec_ex;
3576         }
3577
3578 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3579 #include "../crypto/bio/bss_file.c"
3580 #endif
3581
3582 IMPLEMENT_STACK_OF(SSL_CIPHER)
3583 IMPLEMENT_STACK_OF(SSL_COMP)
3584 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3585                                     ssl_cipher_id);