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 #if 0
 326         s->verify_depth=ctx->verify_depth;
 327 #endif
 328         s->sid_ctx_length=ctx->sid_ctx_length;
 329         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 330         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 331         s->verify_callback=ctx->default_verify_callback;
 332         s->generate_session_id=ctx->generate_session_id;
 333
 334         s->param = X509_VERIFY_PARAM_new();
 335         if (!s->param)
 336                 goto err;
 337         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 338 #if 0
 339         s->purpose = ctx->purpose;
 340         s->trust = ctx->trust;
 341 #endif
 342         s->quiet_shutdown=ctx->quiet_shutdown;
 343         s->max_send_fragment = ctx->max_send_fragment;
 344
 345         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 346         s->ctx=ctx;
 347 #ifndef OPENSSL_NO_TLSEXT
 348         s->tlsext_debug_cb = 0;
 349         s->tlsext_debug_arg = NULL;
 350         s->tlsext_ticket_expected = 0;
 351         s->tlsext_status_type = -1;
 352         s->tlsext_status_expected = 0;
 353         s->tlsext_ocsp_ids = NULL;
 354         s->tlsext_ocsp_exts = NULL;
 355         s->tlsext_ocsp_resp = NULL;
 356         s->tlsext_ocsp_resplen = -1;
 357         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 358         s->initial_ctx=ctx;
 359 #ifndef OPENSSL_NO_EC
 360         if (ctx->tlsext_ecpointformatlist)
 361                 {
 362                 s->tlsext_ecpointformatlist =
 363                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 364                                         ctx->tlsext_ecpointformatlist_length);
 365                 if (!s->tlsext_ecpointformatlist)
 366                         goto err;
 367                 s->tlsext_ecpointformatlist_length =
 368                                         ctx->tlsext_ecpointformatlist_length;
 369                 }
 370         if (ctx->tlsext_ellipticcurvelist)
 371                 {
 372                 s->tlsext_ellipticcurvelist =
 373                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 374                                         ctx->tlsext_ellipticcurvelist_length);
 375                 if (!s->tlsext_ellipticcurvelist)
 376                         goto err;
 377                 s->tlsext_ellipticcurvelist_length =
 378                                         ctx->tlsext_ellipticcurvelist_length;
 379                 }
 380 #endif
 381 # ifndef OPENSSL_NO_NEXTPROTONEG
 382         s->next_proto_negotiated = NULL;
 383 # endif
 384
 385         if (s->ctx->alpn_client_proto_list)
 386                 {
 387                 s->alpn_client_proto_list =
 388                         OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
 389                 if (s->alpn_client_proto_list == NULL)
 390                         goto err;
 391                 memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
 392                        s->ctx->alpn_client_proto_list_len);
 393                 s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
 394                 }
 395 #endif
 396
 397         s->verify_result=X509_V_OK;
 398
 399         s->method=ctx->method;
 400
 401         if (!s->method->ssl_new(s))
 402                 goto err;
 403
 404         s->references=1;
 405         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 406
 407         SSL_clear(s);
 408
 409         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 410
 411 #ifndef OPENSSL_NO_PSK
 412         s->psk_client_callback=ctx->psk_client_callback;
 413         s->psk_server_callback=ctx->psk_server_callback;
 414 #endif
 415
 416         return(s);
 417 err:
 418         if (s != NULL)
 419                 SSL_free(s);
 420         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 421         return(NULL);
 422         }
 423
 424 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 425                                    unsigned int sid_ctx_len)
 426     {
 427     if(sid_ctx_len > sizeof ctx->sid_ctx)
 428         {
 429         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 430         return 0;
 431         }
 432     ctx->sid_ctx_length=sid_ctx_len;
 433     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 434
 435     return 1;
 436     }
 437
 438 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 439                                unsigned int sid_ctx_len)
 440     {
 441     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 442         {
 443         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 444         return 0;
 445         }
 446     ssl->sid_ctx_length=sid_ctx_len;
 447     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 448
 449     return 1;
 450     }
 451
 452 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 453         {
 454         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 455         ctx->generate_session_id = cb;
 456         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 457         return 1;
 458         }
 459
 460 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 461         {
 462         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 463         ssl->generate_session_id = cb;
 464         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 465         return 1;
 466         }
 467
 468 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 469                                 unsigned int id_len)
 470         {
 471         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 472          * we can "construct" a session to give us the desired check - ie. to
 473          * find if there's a session in the hash table that would conflict with
 474          * any new session built out of this id/id_len and the ssl_version in
 475          * use by this SSL. */
 476         SSL_SESSION r, *p;
 477
 478         if(id_len > sizeof r.session_id)
 479                 return 0;
 480
 481         r.ssl_version = ssl->version;
 482         r.session_id_length = id_len;
 483         memcpy(r.session_id, id, id_len);
 484         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 485          * callback is calling us to check the uniqueness of a shorter ID, it
 486          * must be compared as a padded-out ID because that is what it will be
 487          * converted to when the callback has finished choosing it. */
 488         if((r.ssl_version == SSL2_VERSION) &&
 489                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 490                 {
 491                 memset(r.session_id + id_len, 0,
 492                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 493                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 494                 }
 495
 496         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 497         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 498         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 499         return (p != NULL);
 500         }
 501
 502 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 503         {
 504         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 505         }
 506
 507 int SSL_set_purpose(SSL *s, int purpose)
 508         {
 509         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 510         }
 511
 512 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 513         {
 514         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 515         }
 516
 517 int SSL_set_trust(SSL *s, int trust)
 518         {
 519         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 520         }
 521
 522 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 523         {
 524         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 525         }
 526
 527 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 528         {
 529         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 530         }
 531
 532 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
 533         {
 534         return ctx->param;
 535         }
 536
 537 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
 538         {
 539         return ssl->param;
 540         }
 541
 542 void SSL_certs_clear(SSL *s)
 543         {
 544         ssl_cert_clear_certs(s->cert);
 545         }
 546
 547 void SSL_free(SSL *s)
 548         {
 549         int i;
 550
 551         if(s == NULL)
 552             return;
 553
 554         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 555 #ifdef REF_PRINT
 556         REF_PRINT("SSL",s);
 557 #endif
 558         if (i > 0) return;
 559 #ifdef REF_CHECK
 560         if (i < 0)
 561                 {
 562                 fprintf(stderr,"SSL_free, bad reference count\n");
 563                 abort(); /* ok */
 564                 }
 565 #endif
 566
 567         if (s->param)
 568                 X509_VERIFY_PARAM_free(s->param);
 569
 570         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 571
 572         if (s->bbio != NULL)
 573                 {
 574                 /* If the buffering BIO is in place, pop it off */
 575                 if (s->bbio == s->wbio)
 576                         {
 577                         s->wbio=BIO_pop(s->wbio);
 578                         }
 579                 BIO_free(s->bbio);
 580                 s->bbio=NULL;
 581                 }
 582         if (s->rbio != NULL)
 583                 BIO_free_all(s->rbio);
 584         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 585                 BIO_free_all(s->wbio);
 586
 587         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 588
 589         /* add extra stuff */
 590         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 591         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 592
 593         /* Make the next call work :-) */
 594         if (s->session != NULL)
 595                 {
 596                 ssl_clear_bad_session(s);
 597                 SSL_SESSION_free(s->session);
 598                 }
 599
 600         ssl_clear_cipher_ctx(s);
 601         ssl_clear_hash_ctx(&s->read_hash);
 602         ssl_clear_hash_ctx(&s->write_hash);
 603
 604         if (s->cert != NULL) ssl_cert_free(s->cert);
 605         /* Free up if allocated */
 606
 607 #ifndef OPENSSL_NO_TLSEXT
 608         if (s->tlsext_hostname)
 609                 OPENSSL_free(s->tlsext_hostname);
 610         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 611 #ifndef OPENSSL_NO_EC
 612         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 613         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 614 #endif /* OPENSSL_NO_EC */
 615         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 616         if (s->tlsext_ocsp_exts)
 617                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 618                                                 X509_EXTENSION_free);
 619         if (s->tlsext_ocsp_ids)
 620                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 621         if (s->tlsext_ocsp_resp)
 622                 OPENSSL_free(s->tlsext_ocsp_resp);
 623         if (s->alpn_client_proto_list)
 624                 OPENSSL_free(s->alpn_client_proto_list);
 625 #endif
 626
 627         if (s->client_CA != NULL)
 628                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 629
 630         if (s->method != NULL) s->method->ssl_free(s);
 631
 632         if (s->ctx) SSL_CTX_free(s->ctx);
 633
 634 #ifndef OPENSSL_NO_KRB5
 635         if (s->kssl_ctx != NULL)
 636                 kssl_ctx_free(s->kssl_ctx);
 637 #endif  /* OPENSSL_NO_KRB5 */
 638
 639 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 640         if (s->next_proto_negotiated)
 641                 OPENSSL_free(s->next_proto_negotiated);
 642 #endif
 643
 644         if (s->srtp_profiles)
 645             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 646
 647         OPENSSL_free(s);
 648         }
 649
 650 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 651         {
 652         /* If the output buffering BIO is still in place, remove it
 653          */
 654         if (s->bbio != NULL)
 655                 {
 656                 if (s->wbio == s->bbio)
 657                         {
 658                         s->wbio=s->wbio->next_bio;
 659                         s->bbio->next_bio=NULL;
 660                         }
 661                 }
 662         if ((s->rbio != NULL) && (s->rbio != rbio))
 663                 BIO_free_all(s->rbio);
 664         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 665                 BIO_free_all(s->wbio);
 666         s->rbio=rbio;
 667         s->wbio=wbio;
 668         }
 669
 670 BIO *SSL_get_rbio(const SSL *s)
 671         { return(s->rbio); }
 672
 673 BIO *SSL_get_wbio(const SSL *s)
 674         { return(s->wbio); }
 675
 676 int SSL_get_fd(const SSL *s)
 677         {
 678         return(SSL_get_rfd(s));
 679         }
 680
 681 int SSL_get_rfd(const SSL *s)
 682         {
 683         int ret= -1;
 684         BIO *b,*r;
 685
 686         b=SSL_get_rbio(s);
 687         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 688         if (r != NULL)
 689                 BIO_get_fd(r,&ret);
 690         return(ret);
 691         }
 692
 693 int SSL_get_wfd(const SSL *s)
 694         {
 695         int ret= -1;
 696         BIO *b,*r;
 697
 698         b=SSL_get_wbio(s);
 699         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 700         if (r != NULL)
 701                 BIO_get_fd(r,&ret);
 702         return(ret);
 703         }
 704
 705 #ifndef OPENSSL_NO_SOCK
 706 int SSL_set_fd(SSL *s,int fd)
 707         {
 708         int ret=0;
 709         BIO *bio=NULL;
 710
 711         bio=BIO_new(BIO_s_socket());
 712
 713         if (bio == NULL)
 714                 {
 715                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 716                 goto err;
 717                 }
 718         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 719         SSL_set_bio(s,bio,bio);
 720         ret=1;
 721 err:
 722         return(ret);
 723         }
 724
 725 int SSL_set_wfd(SSL *s,int fd)
 726         {
 727         int ret=0;
 728         BIO *bio=NULL;
 729
 730         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 731                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 732                 {
 733                 bio=BIO_new(BIO_s_socket());
 734
 735                 if (bio == NULL)
 736                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 737                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 738                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 739                 }
 740         else
 741                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 742         ret=1;
 743 err:
 744         return(ret);
 745         }
 746
 747 int SSL_set_rfd(SSL *s,int fd)
 748         {
 749         int ret=0;
 750         BIO *bio=NULL;
 751
 752         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 753                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 754                 {
 755                 bio=BIO_new(BIO_s_socket());
 756
 757                 if (bio == NULL)
 758                         {
 759                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 760                         goto err;
 761                         }
 762                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 763                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 764                 }
 765         else
 766                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 767         ret=1;
 768 err:
 769         return(ret);
 770         }
 771 #endif
 772
 773
 774 /* return length of latest Finished message we sent, copy to 'buf' */
 775 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 776         {
 777         size_t ret = 0;
 778
 779         if (s->s3 != NULL)
 780                 {
 781                 ret = s->s3->tmp.finish_md_len;
 782                 if (count > ret)
 783                         count = ret;
 784                 memcpy(buf, s->s3->tmp.finish_md, count);
 785                 }
 786         return ret;
 787         }
 788
 789 /* return length of latest Finished message we expected, copy to 'buf' */
 790 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 791         {
 792         size_t ret = 0;
 793
 794         if (s->s3 != NULL)
 795                 {
 796                 ret = s->s3->tmp.peer_finish_md_len;
 797                 if (count > ret)
 798                         count = ret;
 799                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 800                 }
 801         return ret;
 802         }
 803
 804
 805 int SSL_get_verify_mode(const SSL *s)
 806         {
 807         return(s->verify_mode);
 808         }
 809
 810 int SSL_get_verify_depth(const SSL *s)
 811         {
 812         return X509_VERIFY_PARAM_get_depth(s->param);
 813         }
 814
 815 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 816         {
 817         return(s->verify_callback);
 818         }
 819
 820 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 821         {
 822         return(ctx->verify_mode);
 823         }
 824
 825 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 826         {
 827         return X509_VERIFY_PARAM_get_depth(ctx->param);
 828         }
 829
 830 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 831         {
 832         return(ctx->default_verify_callback);
 833         }
 834
 835 void SSL_set_verify(SSL *s,int mode,
 836                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 837         {
 838         s->verify_mode=mode;
 839         if (callback != NULL)
 840                 s->verify_callback=callback;
 841         }
 842
 843 void SSL_set_verify_depth(SSL *s,int depth)
 844         {
 845         X509_VERIFY_PARAM_set_depth(s->param, depth);
 846         }
 847
 848 void SSL_set_read_ahead(SSL *s,int yes)
 849         {
 850         s->read_ahead=yes;
 851         }
 852
 853 int SSL_get_read_ahead(const SSL *s)
 854         {
 855         return(s->read_ahead);
 856         }
 857
 858 int SSL_pending(const SSL *s)
 859         {
 860         /* SSL_pending cannot work properly if read-ahead is enabled
 861          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 862          * and it is impossible to fix since SSL_pending cannot report
 863          * errors that may be observed while scanning the new data.
 864          * (Note that SSL_pending() is often used as a boolean value,
 865          * so we'd better not return -1.)
 866          */
 867         return(s->method->ssl_pending(s));
 868         }
 869
 870 X509 *SSL_get_peer_certificate(const SSL *s)
 871         {
 872         X509 *r;
 873
 874         if ((s == NULL) || (s->session == NULL))
 875                 r=NULL;
 876         else
 877                 r=s->session->peer;
 878
 879         if (r == NULL) return(r);
 880
 881         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 882
 883         return(r);
 884         }
 885
 886 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 887         {
 888         STACK_OF(X509) *r;
 889
 890         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 891                 r=NULL;
 892         else
 893                 r=s->session->sess_cert->cert_chain;
 894
 895         /* If we are a client, cert_chain includes the peer's own
 896          * certificate; if we are a server, it does not. */
 897
 898         return(r);
 899         }
 900
 901 /* Now in theory, since the calling process own 't' it should be safe to
 902  * modify.  We need to be able to read f without being hassled */
 903 void SSL_copy_session_id(SSL *t,const SSL *f)
 904         {
 905         CERT *tmp;
 906
 907         /* Do we need to to SSL locking? */
 908         SSL_set_session(t,SSL_get_session(f));
 909
 910         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 911          * vice-versa */
 912         if (t->method != f->method)
 913                 {
 914                 t->method->ssl_free(t); /* cleanup current */
 915                 t->method=f->method;    /* change method */
 916                 t->method->ssl_new(t);  /* setup new */
 917                 }
 918
 919         tmp=t->cert;
 920         if (f->cert != NULL)
 921                 {
 922                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 923                 t->cert=f->cert;
 924                 }
 925         else
 926                 t->cert=NULL;
 927         if (tmp != NULL) ssl_cert_free(tmp);
 928         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 929         }
 930
 931 /* Fix this so it checks all the valid key/cert options */
 932 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 933         {
 934         if (    (ctx == NULL) ||
 935                 (ctx->cert == NULL) ||
 936                 (ctx->cert->key->x509 == NULL))
 937                 {
 938                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 939                 return(0);
 940                 }
 941         if      (ctx->cert->key->privatekey == NULL)
 942                 {
 943                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 944                 return(0);
 945                 }
 946         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 947         }
 948
 949 /* Fix this function so that it takes an optional type parameter */
 950 int SSL_check_private_key(const SSL *ssl)
 951         {
 952         if (ssl == NULL)
 953                 {
 954                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 955                 return(0);
 956                 }
 957         if (ssl->cert == NULL)
 958                 {
 959                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 960                 return 0;
 961                 }
 962         if (ssl->cert->key->x509 == NULL)
 963                 {
 964                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 965                 return(0);
 966                 }
 967         if (ssl->cert->key->privatekey == NULL)
 968                 {
 969                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 970                 return(0);
 971                 }
 972         return(X509_check_private_key(ssl->cert->key->x509,
 973                 ssl->cert->key->privatekey));
 974         }
 975
 976 int SSL_accept(SSL *s)
 977         {
 978         if (s->handshake_func == 0)
 979                 /* Not properly initialized yet */
 980                 SSL_set_accept_state(s);
 981
 982         return(s->method->ssl_accept(s));
 983         }
 984
 985 int SSL_connect(SSL *s)
 986         {
 987         if (s->handshake_func == 0)
 988                 /* Not properly initialized yet */
 989                 SSL_set_connect_state(s);
 990
 991         return(s->method->ssl_connect(s));
 992         }
 993
 994 long SSL_get_default_timeout(const SSL *s)
 995         {
 996         return(s->method->get_timeout());
 997         }
 998
 999 int SSL_read(SSL *s,void *buf,int num)
1000         {
1001         if (s->handshake_func == 0)
1002                 {
1003                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
1004                 return -1;
1005                 }
1006
1007         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1008                 {
1009                 s->rwstate=SSL_NOTHING;
1010                 return(0);
1011                 }
1012         return(s->method->ssl_read(s,buf,num));
1013         }
1014
1015 int SSL_peek(SSL *s,void *buf,int num)
1016         {
1017         if (s->handshake_func == 0)
1018                 {
1019                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1020                 return -1;
1021                 }
1022
1023         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1024                 {
1025                 return(0);
1026                 }
1027         return(s->method->ssl_peek(s,buf,num));
1028         }
1029
1030 int SSL_write(SSL *s,const void *buf,int num)
1031         {
1032         if (s->handshake_func == 0)
1033                 {
1034                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1035                 return -1;
1036                 }
1037
1038         if (s->shutdown & SSL_SENT_SHUTDOWN)
1039                 {
1040                 s->rwstate=SSL_NOTHING;
1041                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1042                 return(-1);
1043                 }
1044         return(s->method->ssl_write(s,buf,num));
1045         }
1046
1047 int SSL_shutdown(SSL *s)
1048         {
1049         /* Note that this function behaves differently from what one might
1050          * expect.  Return values are 0 for no success (yet),
1051          * 1 for success; but calling it once is usually not enough,
1052          * even if blocking I/O is used (see ssl3_shutdown).
1053          */
1054
1055         if (s->handshake_func == 0)
1056                 {
1057                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1058                 return -1;
1059                 }
1060
1061         if ((s != NULL) && !SSL_in_init(s))
1062                 return(s->method->ssl_shutdown(s));
1063         else
1064                 return(1);
1065         }
1066
1067 int SSL_renegotiate(SSL *s)
1068         {
1069         if (s->renegotiate == 0)
1070                 s->renegotiate=1;
1071
1072         s->new_session=1;
1073
1074         return(s->method->ssl_renegotiate(s));
1075         }
1076
1077 int SSL_renegotiate_abbreviated(SSL *s)
1078         {
1079         if (s->renegotiate == 0)
1080                 s->renegotiate=1;
1081
1082         s->new_session=0;
1083
1084         return(s->method->ssl_renegotiate(s));
1085         }
1086
1087 int SSL_renegotiate_pending(SSL *s)
1088         {
1089         /* becomes true when negotiation is requested;
1090          * false again once a handshake has finished */
1091         return (s->renegotiate != 0);
1092         }
1093
1094 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1095         {
1096         long l;
1097
1098         switch (cmd)
1099                 {
1100         case SSL_CTRL_GET_READ_AHEAD:
1101                 return(s->read_ahead);
1102         case SSL_CTRL_SET_READ_AHEAD:
1103                 l=s->read_ahead;
1104                 s->read_ahead=larg;
1105                 return(l);
1106
1107         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1108                 s->msg_callback_arg = parg;
1109                 return 1;
1110
1111         case SSL_CTRL_OPTIONS:
1112                 return(s->options|=larg);
1113         case SSL_CTRL_CLEAR_OPTIONS:
1114                 return(s->options&=~larg);
1115         case SSL_CTRL_MODE:
1116                 return(s->mode|=larg);
1117         case SSL_CTRL_CLEAR_MODE:
1118                 return(s->mode &=~larg);
1119         case SSL_CTRL_GET_MAX_CERT_LIST:
1120                 return(s->max_cert_list);
1121         case SSL_CTRL_SET_MAX_CERT_LIST:
1122                 l=s->max_cert_list;
1123                 s->max_cert_list=larg;
1124                 return(l);
1125         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1126                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1127                         return 0;
1128                 s->max_send_fragment = larg;
1129                 return 1;
1130         case SSL_CTRL_GET_RI_SUPPORT:
1131                 if (s->s3)
1132                         return s->s3->send_connection_binding;
1133                 else return 0;
1134         case SSL_CTRL_CERT_FLAGS:
1135                 return(s->cert->cert_flags|=larg);
1136         case SSL_CTRL_CLEAR_CERT_FLAGS:
1137                 return(s->cert->cert_flags &=~larg);
1138
1139         case SSL_CTRL_GET_RAW_CIPHERLIST:
1140                 if (parg)
1141                         {
1142                         if (s->cert->ciphers_raw == NULL)
1143                                 return 0;
1144                         *(unsigned char **)parg = s->cert->ciphers_raw;
1145                         return (int)s->cert->ciphers_rawlen;
1146                         }
1147                 else
1148                         return ssl_put_cipher_by_char(s,NULL,NULL);
1149         default:
1150                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1151                 }
1152         }
1153
1154 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1155         {
1156         switch(cmd)
1157                 {
1158         case SSL_CTRL_SET_MSG_CALLBACK:
1159                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1160                 return 1;
1161
1162         default:
1163                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1164                 }
1165         }
1166
1167 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1168         {
1169         return ctx->sessions;
1170         }
1171
1172 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1173         {
1174         long l;
1175         /* For some cases with ctx == NULL perform syntax checks */
1176         if (ctx == NULL)
1177                 {
1178                 switch (cmd)
1179                         {
1180 #ifndef OPENSSL_NO_EC
1181                 case SSL_CTRL_SET_CURVES_LIST:
1182                         return tls1_set_curves_list(NULL, NULL, parg);
1183 #endif
1184                 case SSL_CTRL_SET_SIGALGS_LIST:
1185                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1186                         return tls1_set_sigalgs_list(NULL, parg, 0);
1187                 default:
1188                         return 0;
1189                         }
1190                 }
1191
1192         switch (cmd)
1193                 {
1194         case SSL_CTRL_GET_READ_AHEAD:
1195                 return(ctx->read_ahead);
1196         case SSL_CTRL_SET_READ_AHEAD:
1197                 l=ctx->read_ahead;
1198                 ctx->read_ahead=larg;
1199                 return(l);
1200
1201         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1202                 ctx->msg_callback_arg = parg;
1203                 return 1;
1204
1205         case SSL_CTRL_GET_MAX_CERT_LIST:
1206                 return(ctx->max_cert_list);
1207         case SSL_CTRL_SET_MAX_CERT_LIST:
1208                 l=ctx->max_cert_list;
1209                 ctx->max_cert_list=larg;
1210                 return(l);
1211
1212         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1213                 l=ctx->session_cache_size;
1214                 ctx->session_cache_size=larg;
1215                 return(l);
1216         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1217                 return(ctx->session_cache_size);
1218         case SSL_CTRL_SET_SESS_CACHE_MODE:
1219                 l=ctx->session_cache_mode;
1220                 ctx->session_cache_mode=larg;
1221                 return(l);
1222         case SSL_CTRL_GET_SESS_CACHE_MODE:
1223                 return(ctx->session_cache_mode);
1224
1225         case SSL_CTRL_SESS_NUMBER:
1226                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1227         case SSL_CTRL_SESS_CONNECT:
1228                 return(ctx->stats.sess_connect);
1229         case SSL_CTRL_SESS_CONNECT_GOOD:
1230                 return(ctx->stats.sess_connect_good);
1231         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1232                 return(ctx->stats.sess_connect_renegotiate);
1233         case SSL_CTRL_SESS_ACCEPT:
1234                 return(ctx->stats.sess_accept);
1235         case SSL_CTRL_SESS_ACCEPT_GOOD:
1236                 return(ctx->stats.sess_accept_good);
1237         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1238                 return(ctx->stats.sess_accept_renegotiate);
1239         case SSL_CTRL_SESS_HIT:
1240                 return(ctx->stats.sess_hit);
1241         case SSL_CTRL_SESS_CB_HIT:
1242                 return(ctx->stats.sess_cb_hit);
1243         case SSL_CTRL_SESS_MISSES:
1244                 return(ctx->stats.sess_miss);
1245         case SSL_CTRL_SESS_TIMEOUTS:
1246                 return(ctx->stats.sess_timeout);
1247         case SSL_CTRL_SESS_CACHE_FULL:
1248                 return(ctx->stats.sess_cache_full);
1249         case SSL_CTRL_OPTIONS:
1250                 return(ctx->options|=larg);
1251         case SSL_CTRL_CLEAR_OPTIONS:
1252                 return(ctx->options&=~larg);
1253         case SSL_CTRL_MODE:
1254                 return(ctx->mode|=larg);
1255         case SSL_CTRL_CLEAR_MODE:
1256                 return(ctx->mode&=~larg);
1257         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1258                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1259                         return 0;
1260                 ctx->max_send_fragment = larg;
1261                 return 1;
1262         case SSL_CTRL_CERT_FLAGS:
1263                 return(ctx->cert->cert_flags|=larg);
1264         case SSL_CTRL_CLEAR_CERT_FLAGS:
1265                 return(ctx->cert->cert_flags &=~larg);
1266         default:
1267                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1268                 }
1269         }
1270
1271 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1272         {
1273         switch(cmd)
1274                 {
1275         case SSL_CTRL_SET_MSG_CALLBACK:
1276                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1277                 return 1;
1278
1279         default:
1280                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1281                 }
1282         }
1283
1284 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1285         {
1286         long l;
1287
1288         l=a->id-b->id;
1289         if (l == 0L)
1290                 return(0);
1291         else
1292                 return((l > 0)?1:-1);
1293         }
1294
1295 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1296                         const SSL_CIPHER * const *bp)
1297         {
1298         long l;
1299
1300         l=(*ap)->id-(*bp)->id;
1301         if (l == 0L)
1302                 return(0);
1303         else
1304                 return((l > 0)?1:-1);
1305         }
1306
1307 /** return a STACK of the ciphers available for the SSL and in order of
1308  * preference */
1309 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1310         {
1311         if (s != NULL)
1312                 {
1313                 if (s->cipher_list != NULL)
1314                         {
1315                         return(s->cipher_list);
1316                         }
1317                 else if ((s->ctx != NULL) &&
1318                         (s->ctx->cipher_list != NULL))
1319                         {
1320                         return(s->ctx->cipher_list);
1321                         }
1322                 }
1323         return(NULL);
1324         }
1325
1326 /** return a STACK of the ciphers available for the SSL and in order of
1327  * algorithm id */
1328 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1329         {
1330         if (s != NULL)
1331                 {
1332                 if (s->cipher_list_by_id != NULL)
1333                         {
1334                         return(s->cipher_list_by_id);
1335                         }
1336                 else if ((s->ctx != NULL) &&
1337                         (s->ctx->cipher_list_by_id != NULL))
1338                         {
1339                         return(s->ctx->cipher_list_by_id);
1340                         }
1341                 }
1342         return(NULL);
1343         }
1344
1345 /** The old interface to get the same thing as SSL_get_ciphers() */
1346 const char *SSL_get_cipher_list(const SSL *s,int n)
1347         {
1348         SSL_CIPHER *c;
1349         STACK_OF(SSL_CIPHER) *sk;
1350
1351         if (s == NULL) return(NULL);
1352         sk=SSL_get_ciphers(s);
1353         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1354                 return(NULL);
1355         c=sk_SSL_CIPHER_value(sk,n);
1356         if (c == NULL) return(NULL);
1357         return(c->name);
1358         }
1359
1360 /** specify the ciphers to be used by default by the SSL_CTX */
1361 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1362         {
1363         STACK_OF(SSL_CIPHER) *sk;
1364
1365         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1366                 &ctx->cipher_list_by_id,str, ctx->cert);
1367         /* ssl_create_cipher_list may return an empty stack if it
1368          * was unable to find a cipher matching the given rule string
1369          * (for example if the rule string specifies a cipher which
1370          * has been disabled). This is not an error as far as
1371          * ssl_create_cipher_list is concerned, and hence
1372          * ctx->cipher_list and ctx->cipher_list_by_id has been
1373          * updated. */
1374         if (sk == NULL)
1375                 return 0;
1376         else if (sk_SSL_CIPHER_num(sk) == 0)
1377                 {
1378                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1379                 return 0;
1380                 }
1381         return 1;
1382         }
1383
1384 /** specify the ciphers to be used by the SSL */
1385 int SSL_set_cipher_list(SSL *s,const char *str)
1386         {
1387         STACK_OF(SSL_CIPHER) *sk;
1388
1389         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1390                 &s->cipher_list_by_id,str, s->cert);
1391         /* see comment in SSL_CTX_set_cipher_list */
1392         if (sk == NULL)
1393                 return 0;
1394         else if (sk_SSL_CIPHER_num(sk) == 0)
1395                 {
1396                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1397                 return 0;
1398                 }
1399         return 1;
1400         }
1401
1402 /* works well for SSLv2, not so good for SSLv3 */
1403 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1404         {
1405         char *p;
1406         STACK_OF(SSL_CIPHER) *sk;
1407         SSL_CIPHER *c;
1408         int i;
1409
1410         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1411                 (len < 2))
1412                 return(NULL);
1413
1414         p=buf;
1415         sk=s->session->ciphers;
1416
1417         if (sk_SSL_CIPHER_num(sk) == 0)
1418                 return NULL;
1419
1420         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1421                 {
1422                 int n;
1423
1424                 c=sk_SSL_CIPHER_value(sk,i);
1425                 n=strlen(c->name);
1426                 if (n+1 > len)
1427                         {
1428                         if (p != buf)
1429                                 --p;
1430                         *p='\0';
1431                         return buf;
1432                         }
1433                 strcpy(p,c->name);
1434                 p+=n;
1435                 *(p++)=':';
1436                 len-=n+1;
1437                 }
1438         p[-1]='\0';
1439         return(buf);
1440         }
1441
1442 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1443                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1444         {
1445         int i,j=0;
1446         SSL_CIPHER *c;
1447         CERT *ct = s->cert;
1448         unsigned char *q;
1449         int empty_reneg_info_scsv = !s->renegotiate;
1450         /* Set disabled masks for this session */
1451         ssl_set_client_disabled(s);
1452
1453         if (sk == NULL) return(0);
1454         q=p;
1455         if (put_cb == NULL)
1456                 put_cb = s->method->put_cipher_by_char;
1457
1458         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1459                 {
1460                 c=sk_SSL_CIPHER_value(sk,i);
1461                 /* Skip disabled ciphers */
1462                 if (c->algorithm_ssl & ct->mask_ssl ||
1463                         c->algorithm_mkey & ct->mask_k ||
1464                         c->algorithm_auth & ct->mask_a)
1465                         continue;
1466 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1467                 if (c->id == SSL3_CK_SCSV)
1468                         {
1469                         if (!empty_reneg_info_scsv)
1470                                 continue;
1471                         else
1472                                 empty_reneg_info_scsv = 0;
1473                         }
1474 #endif
1475                 j = put_cb(c,p);
1476                 p+=j;
1477                 }
1478         /* If p == q, no ciphers; caller indicates an error.
1479          * Otherwise, add applicable SCSVs. */
1480         if (p != q)
1481                 {
1482                 if (empty_reneg_info_scsv)
1483                         {
1484                         static SSL_CIPHER scsv =
1485                                 {
1486                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1487                                 };
1488                         j = put_cb(&scsv,p);
1489                         p+=j;
1490 #ifdef OPENSSL_RI_DEBUG
1491                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1492 #endif
1493                         }
1494                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1495                         {
1496                         static SSL_CIPHER scsv =
1497                                 {
1498                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1499                                 };
1500                         j = put_cb(&scsv,p);
1501                         p+=j;
1502                         }
1503                 }
1504
1505         return(p-q);
1506         }
1507
1508 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1509                                                STACK_OF(SSL_CIPHER) **skp)
1510         {
1511         const SSL_CIPHER *c;
1512         STACK_OF(SSL_CIPHER) *sk;
1513         int i,n;
1514
1515         if (s->s3)
1516                 s->s3->send_connection_binding = 0;
1517
1518         n=ssl_put_cipher_by_char(s,NULL,NULL);
1519         if (n == 0 || (num%n) != 0)
1520                 {
1521                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1522                 return(NULL);
1523                 }
1524         if ((skp == NULL) || (*skp == NULL))
1525                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1526         else
1527                 {
1528                 sk= *skp;
1529                 sk_SSL_CIPHER_zero(sk);
1530                 }
1531
1532         if (s->cert->ciphers_raw)
1533                 OPENSSL_free(s->cert->ciphers_raw);
1534         s->cert->ciphers_raw = BUF_memdup(p, num);
1535         if (s->cert->ciphers_raw == NULL)
1536                 {
1537                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1538                 goto err;
1539                 }
1540         s->cert->ciphers_rawlen = (size_t)num;
1541
1542         for (i=0; i<num; i+=n)
1543                 {
1544                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1545                 if (s->s3 && (n != 3 || !p[0]) &&
1546                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1547                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1548                         {
1549                         /* SCSV fatal if renegotiating */
1550                         if (s->renegotiate)
1551                                 {
1552                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1553                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1554                                 goto err;
1555                                 }
1556                         s->s3->send_connection_binding = 1;
1557                         p += n;
1558 #ifdef OPENSSL_RI_DEBUG
1559                         fprintf(stderr, "SCSV received by server\n");
1560 #endif
1561                         continue;
1562                         }
1563
1564                 /* Check for TLS_FALLBACK_SCSV */
1565                 if ((n != 3 || !p[0]) &&
1566                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1567                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1568                         {
1569                         /* The SCSV indicates that the client previously tried a higher version.
1570                          * Fail if the current version is an unexpected downgrade. */
1571                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1572                                 {
1573                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1574                                 if (s->s3)
1575                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1576                                 goto err;
1577                                 }
1578                         p += n;
1579                         continue;
1580                         }
1581
1582                 c=ssl_get_cipher_by_char(s,p);
1583                 p+=n;
1584                 if (c != NULL)
1585                         {
1586                         if (!sk_SSL_CIPHER_push(sk,c))
1587                                 {
1588                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1589                                 goto err;
1590                                 }
1591                         }
1592                 }
1593
1594         if (skp != NULL)
1595                 *skp=sk;
1596         return(sk);
1597 err:
1598         if ((skp == NULL) || (*skp == NULL))
1599                 sk_SSL_CIPHER_free(sk);
1600         return(NULL);
1601         }
1602
1603
1604 #ifndef OPENSSL_NO_TLSEXT
1605 /** return a servername extension value if provided in Client Hello, or NULL.
1606  * So far, only host_name types are defined (RFC 3546).
1607  */
1608
1609 const char *SSL_get_servername(const SSL *s, const int type)
1610         {
1611         if (type != TLSEXT_NAMETYPE_host_name)
1612                 return NULL;
1613
1614         return s->session && !s->tlsext_hostname ?
1615                 s->session->tlsext_hostname :
1616                 s->tlsext_hostname;
1617         }
1618
1619 int SSL_get_servername_type(const SSL *s)
1620         {
1621         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1622                 return TLSEXT_NAMETYPE_host_name;
1623         return -1;
1624         }
1625
1626 /* SSL_select_next_proto implements the standard protocol selection. It is
1627  * expected that this function is called from the callback set by
1628  * SSL_CTX_set_next_proto_select_cb.
1629  *
1630  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1631  * strings. The length byte itself is not included in the length. A byte
1632  * string of length 0 is invalid. No byte string may be truncated.
1633  *
1634  * The current, but experimental algorithm for selecting the protocol is:
1635  *
1636  * 1) If the server doesn't support NPN then this is indicated to the
1637  * callback. In this case, the client application has to abort the connection
1638  * or have a default application level protocol.
1639  *
1640  * 2) If the server supports NPN, but advertises an empty list then the
1641  * client selects the first protcol in its list, but indicates via the
1642  * API that this fallback case was enacted.
1643  *
1644  * 3) Otherwise, the client finds the first protocol in the server's list
1645  * that it supports and selects this protocol. This is because it's
1646  * assumed that the server has better information about which protocol
1647  * a client should use.
1648  *
1649  * 4) If the client doesn't support any of the server's advertised
1650  * protocols, then this is treated the same as case 2.
1651  *
1652  * It returns either
1653  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1654  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1655  */
1656 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)
1657         {
1658         unsigned int i, j;
1659         const unsigned char *result;
1660         int status = OPENSSL_NPN_UNSUPPORTED;
1661
1662         /* For each protocol in server preference order, see if we support it. */
1663         for (i = 0; i < server_len; )
1664                 {
1665                 for (j = 0; j < client_len; )
1666                         {
1667                         if (server[i] == client[j] &&
1668                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1669                                 {
1670                                 /* We found a match */
1671                                 result = &server[i];
1672                                 status = OPENSSL_NPN_NEGOTIATED;
1673                                 goto found;
1674                                 }
1675                         j += client[j];
1676                         j++;
1677                         }
1678                 i += server[i];
1679                 i++;
1680                 }
1681
1682         /* There's no overlap between our protocols and the server's list. */
1683         result = client;
1684         status = OPENSSL_NPN_NO_OVERLAP;
1685
1686         found:
1687         *out = (unsigned char *) result + 1;
1688         *outlen = result[0];
1689         return status;
1690         }
1691
1692 # ifndef OPENSSL_NO_NEXTPROTONEG
1693 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1694  * requested protocol for this connection and returns 0. If the client didn't
1695  * request any protocol, then *data is set to NULL.
1696  *
1697  * Note that the client can request any protocol it chooses. The value returned
1698  * from this function need not be a member of the list of supported protocols
1699  * provided by the callback.
1700  */
1701 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1702         {
1703         *data = s->next_proto_negotiated;
1704         if (!*data) {
1705                 *len = 0;
1706         } else {
1707                 *len = s->next_proto_negotiated_len;
1708         }
1709 }
1710
1711 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1712  * TLS server needs a list of supported protocols for Next Protocol
1713  * Negotiation. The returned list must be in wire format.  The list is returned
1714  * by setting |out| to point to it and |outlen| to its length. This memory will
1715  * not be modified, but one should assume that the SSL* keeps a reference to
1716  * it.
1717  *
1718  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1719  * such extension will be included in the ServerHello. */
1720 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)
1721         {
1722         ctx->next_protos_advertised_cb = cb;
1723         ctx->next_protos_advertised_cb_arg = arg;
1724         }
1725
1726 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1727  * client needs to select a protocol from the server's provided list. |out|
1728  * must be set to point to the selected protocol (which may be within |in|).
1729  * The length of the protocol name must be written into |outlen|. The server's
1730  * advertised protocols are provided in |in| and |inlen|. The callback can
1731  * assume that |in| is syntactically valid.
1732  *
1733  * The client must select a protocol. It is fatal to the connection if this
1734  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1735  */
1736 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)
1737         {
1738         ctx->next_proto_select_cb = cb;
1739         ctx->next_proto_select_cb_arg = arg;
1740         }
1741 # endif
1742
1743 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
1744  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1745  * length-prefixed strings).
1746  *
1747  * Returns 0 on success. */
1748 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
1749                             unsigned protos_len)
1750         {
1751         if (ctx->alpn_client_proto_list)
1752                 OPENSSL_free(ctx->alpn_client_proto_list);
1753
1754         ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1755         if (!ctx->alpn_client_proto_list)
1756                 return 1;
1757         memcpy(ctx->alpn_client_proto_list, protos, protos_len);
1758         ctx->alpn_client_proto_list_len = protos_len;
1759
1760         return 0;
1761         }
1762
1763 /* SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
1764  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1765  * length-prefixed strings).
1766  *
1767  * Returns 0 on success. */
1768 int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
1769                         unsigned protos_len)
1770         {
1771         if (ssl->alpn_client_proto_list)
1772                 OPENSSL_free(ssl->alpn_client_proto_list);
1773
1774         ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1775         if (!ssl->alpn_client_proto_list)
1776                 return 1;
1777         memcpy(ssl->alpn_client_proto_list, protos, protos_len);
1778         ssl->alpn_client_proto_list_len = protos_len;
1779
1780         return 0;
1781         }
1782
1783 /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
1784  * during ClientHello processing in order to select an ALPN protocol from the
1785  * client's list of offered protocols. */
1786 void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
1787                                 int (*cb) (SSL *ssl,
1788                                            const unsigned char **out,
1789                                            unsigned char *outlen,
1790                                            const unsigned char *in,
1791                                            unsigned int inlen,
1792                                            void *arg),
1793                                 void *arg)
1794         {
1795         ctx->alpn_select_cb = cb;
1796         ctx->alpn_select_cb_arg = arg;
1797         }
1798
1799 /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
1800  * On return it sets |*data| to point to |*len| bytes of protocol name (not
1801  * including the leading length-prefix byte). If the server didn't respond with
1802  * a negotiated protocol then |*len| will be zero. */
1803 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1804                             unsigned *len)
1805         {
1806         *data = NULL;
1807         if (ssl->s3)
1808                 *data = ssl->s3->alpn_selected;
1809         if (*data == NULL)
1810                 *len = 0;
1811         else
1812                 *len = ssl->s3->alpn_selected_len;
1813         }
1814
1815 #endif /* !OPENSSL_NO_TLSEXT */
1816
1817 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1818         const char *label, size_t llen, const unsigned char *p, size_t plen,
1819         int use_context)
1820         {
1821         if (s->version < TLS1_VERSION)
1822                 return -1;
1823
1824         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1825                                                            llen, p, plen,
1826                                                            use_context);
1827         }
1828
1829 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1830         {
1831         unsigned long l;
1832
1833         l=(unsigned long)
1834                 ((unsigned int) a->session_id[0]     )|
1835                 ((unsigned int) a->session_id[1]<< 8L)|
1836                 ((unsigned long)a->session_id[2]<<16L)|
1837                 ((unsigned long)a->session_id[3]<<24L);
1838         return(l);
1839         }
1840
1841 /* NB: If this function (or indeed the hash function which uses a sort of
1842  * coarser function than this one) is changed, ensure
1843  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1844  * able to construct an SSL_SESSION that will collide with any existing session
1845  * with a matching session ID. */
1846 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1847         {
1848         if (a->ssl_version != b->ssl_version)
1849                 return(1);
1850         if (a->session_id_length != b->session_id_length)
1851                 return(1);
1852         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1853         }
1854
1855 /* These wrapper functions should remain rather than redeclaring
1856  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1857  * variable. The reason is that the functions aren't static, they're exposed via
1858  * ssl.h. */
1859 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1860 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1861
1862 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1863         {
1864         SSL_CTX *ret=NULL;
1865
1866         if (meth == NULL)
1867                 {
1868                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1869                 return(NULL);
1870                 }
1871
1872 #ifdef OPENSSL_FIPS
1873         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1874                 {
1875                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1876                 return NULL;
1877                 }
1878 #endif
1879
1880         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1881                 {
1882                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1883                 goto err;
1884                 }
1885         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1886         if (ret == NULL)
1887                 goto err;
1888
1889         memset(ret,0,sizeof(SSL_CTX));
1890
1891         ret->method=meth;
1892
1893         ret->cert_store=NULL;
1894         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1895         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1896         ret->session_cache_head=NULL;
1897         ret->session_cache_tail=NULL;
1898
1899         /* We take the system default */
1900         ret->session_timeout=meth->get_timeout();
1901
1902         ret->new_session_cb=0;
1903         ret->remove_session_cb=0;
1904         ret->get_session_cb=0;
1905         ret->generate_session_id=0;
1906
1907         memset((char *)&ret->stats,0,sizeof(ret->stats));
1908
1909         ret->references=1;
1910         ret->quiet_shutdown=0;
1911
1912 /*      ret->cipher=NULL;*/
1913 /*      ret->s2->challenge=NULL;
1914         ret->master_key=NULL;
1915         ret->key_arg=NULL;
1916         ret->s2->conn_id=NULL; */
1917
1918         ret->info_callback=NULL;
1919
1920         ret->app_verify_callback=0;
1921         ret->app_verify_arg=NULL;
1922
1923         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1924         ret->read_ahead=0;
1925         ret->msg_callback=0;
1926         ret->msg_callback_arg=NULL;
1927         ret->verify_mode=SSL_VERIFY_NONE;
1928 #if 0
1929         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1930 #endif
1931         ret->sid_ctx_length=0;
1932         ret->default_verify_callback=NULL;
1933         if ((ret->cert=ssl_cert_new()) == NULL)
1934                 goto err;
1935
1936         ret->default_passwd_callback=0;
1937         ret->default_passwd_callback_userdata=NULL;
1938         ret->client_cert_cb=0;
1939         ret->app_gen_cookie_cb=0;
1940         ret->app_verify_cookie_cb=0;
1941
1942         ret->sessions=lh_SSL_SESSION_new();
1943         if (ret->sessions == NULL) goto err;
1944         ret->cert_store=X509_STORE_new();
1945         if (ret->cert_store == NULL) goto err;
1946
1947         ssl_create_cipher_list(ret->method,
1948                 &ret->cipher_list,&ret->cipher_list_by_id,
1949                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1950         if (ret->cipher_list == NULL
1951             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1952                 {
1953                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1954                 goto err2;
1955                 }
1956
1957         ret->param = X509_VERIFY_PARAM_new();
1958         if (!ret->param)
1959                 goto err;
1960
1961         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1962                 {
1963                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1964                 goto err2;
1965                 }
1966         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1967                 {
1968                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1969                 goto err2;
1970                 }
1971         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1972                 {
1973                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1974                 goto err2;
1975                 }
1976
1977         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1978                 goto err;
1979
1980         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1981
1982         ret->extra_certs=NULL;
1983         /* No compression for DTLS */
1984         if (meth->version != DTLS1_VERSION)
1985                 ret->comp_methods=SSL_COMP_get_compression_methods();
1986
1987         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1988
1989 #ifndef OPENSSL_NO_TLSEXT
1990         ret->tlsext_servername_callback = 0;
1991         ret->tlsext_servername_arg = NULL;
1992         /* Setup RFC4507 ticket keys */
1993         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1994                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1995                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1996                 ret->options |= SSL_OP_NO_TICKET;
1997
1998         ret->tlsext_status_cb = 0;
1999         ret->tlsext_status_arg = NULL;
2000
2001 # ifndef OPENSSL_NO_NEXTPROTONEG
2002         ret->next_protos_advertised_cb = 0;
2003         ret->next_proto_select_cb = 0;
2004 # endif
2005 #endif
2006 #ifndef OPENSSL_NO_PSK
2007         ret->psk_identity_hint=NULL;
2008         ret->psk_client_callback=NULL;
2009         ret->psk_server_callback=NULL;
2010 #endif
2011 #ifndef OPENSSL_NO_SRP
2012         SSL_CTX_SRP_CTX_init(ret);
2013 #endif
2014 #ifndef OPENSSL_NO_BUF_FREELISTS
2015         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
2016         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2017         if (!ret->rbuf_freelist)
2018                 goto err;
2019         ret->rbuf_freelist->chunklen = 0;
2020         ret->rbuf_freelist->len = 0;
2021         ret->rbuf_freelist->head = NULL;
2022         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2023         if (!ret->wbuf_freelist)
2024                 {
2025                 OPENSSL_free(ret->rbuf_freelist);
2026                 goto err;
2027                 }
2028         ret->wbuf_freelist->chunklen = 0;
2029         ret->wbuf_freelist->len = 0;
2030         ret->wbuf_freelist->head = NULL;
2031 #endif
2032 #ifndef OPENSSL_NO_ENGINE
2033         ret->client_cert_engine = NULL;
2034 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2035 #define eng_strx(x)     #x
2036 #define eng_str(x)      eng_strx(x)
2037         /* Use specific client engine automatically... ignore errors */
2038         {
2039         ENGINE *eng;
2040         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2041         if (!eng)
2042                 {
2043                 ERR_clear_error();
2044                 ENGINE_load_builtin_engines();
2045                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2046                 }
2047         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2048                 ERR_clear_error();
2049         }
2050 #endif
2051 #endif
2052         /* Default is to connect to non-RI servers. When RI is more widely
2053          * deployed might change this.
2054          */
2055         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2056
2057         return(ret);
2058 err:
2059         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2060 err2:
2061         if (ret != NULL) SSL_CTX_free(ret);
2062         return(NULL);
2063         }
2064
2065 #if 0
2066 static void SSL_COMP_free(SSL_COMP *comp)
2067     { OPENSSL_free(comp); }
2068 #endif
2069
2070 #ifndef OPENSSL_NO_BUF_FREELISTS
2071 static void
2072 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2073         {
2074         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2075         for (ent = list->head; ent; ent = next)
2076                 {
2077                 next = ent->next;
2078                 OPENSSL_free(ent);
2079                 }
2080         OPENSSL_free(list);
2081         }
2082 #endif
2083
2084 void SSL_CTX_free(SSL_CTX *a)
2085         {
2086         int i;
2087
2088         if (a == NULL) return;
2089
2090         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2091 #ifdef REF_PRINT
2092         REF_PRINT("SSL_CTX",a);
2093 #endif
2094         if (i > 0) return;
2095 #ifdef REF_CHECK
2096         if (i < 0)
2097                 {
2098                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2099                 abort(); /* ok */
2100                 }
2101 #endif
2102
2103         if (a->param)
2104                 X509_VERIFY_PARAM_free(a->param);
2105
2106         /*
2107          * Free internal session cache. However: the remove_cb() may reference
2108          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2109          * after the sessions were flushed.
2110          * As the ex_data handling routines might also touch the session cache,
2111          * the most secure solution seems to be: empty (flush) the cache, then
2112          * free ex_data, then finally free the cache.
2113          * (See ticket [openssl.org #212].)
2114          */
2115         if (a->sessions != NULL)
2116                 SSL_CTX_flush_sessions(a,0);
2117
2118         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2119
2120         if (a->sessions != NULL)
2121                 lh_SSL_SESSION_free(a->sessions);
2122
2123         if (a->cert_store != NULL)
2124                 X509_STORE_free(a->cert_store);
2125         if (a->cipher_list != NULL)
2126                 sk_SSL_CIPHER_free(a->cipher_list);
2127         if (a->cipher_list_by_id != NULL)
2128                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2129         if (a->cert != NULL)
2130                 ssl_cert_free(a->cert);
2131         if (a->client_CA != NULL)
2132                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2133         if (a->extra_certs != NULL)
2134                 sk_X509_pop_free(a->extra_certs,X509_free);
2135 #if 0 /* This should never be done, since it removes a global database */
2136         if (a->comp_methods != NULL)
2137                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2138 #else
2139         a->comp_methods = NULL;
2140 #endif
2141
2142         if (a->srtp_profiles)
2143                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2144
2145 #ifndef OPENSSL_NO_PSK
2146         if (a->psk_identity_hint)
2147                 OPENSSL_free(a->psk_identity_hint);
2148 #endif
2149 #ifndef OPENSSL_NO_SRP
2150         SSL_CTX_SRP_CTX_free(a);
2151 #endif
2152 #ifndef OPENSSL_NO_ENGINE
2153         if (a->client_cert_engine)
2154                 ENGINE_finish(a->client_cert_engine);
2155 #endif
2156
2157 #ifndef OPENSSL_NO_BUF_FREELISTS
2158         if (a->wbuf_freelist)
2159                 ssl_buf_freelist_free(a->wbuf_freelist);
2160         if (a->rbuf_freelist)
2161                 ssl_buf_freelist_free(a->rbuf_freelist);
2162 #endif
2163 #ifndef OPENSSL_NO_TLSEXT
2164 # ifndef OPENSSL_NO_EC
2165         if (a->tlsext_ecpointformatlist)
2166                 OPENSSL_free(a->tlsext_ecpointformatlist);
2167         if (a->tlsext_ellipticcurvelist)
2168                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2169 # endif /* OPENSSL_NO_EC */
2170         if (a->alpn_client_proto_list != NULL)
2171                 OPENSSL_free(a->alpn_client_proto_list);
2172 #endif
2173
2174         OPENSSL_free(a);
2175         }
2176
2177 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2178         {
2179         ctx->default_passwd_callback=cb;
2180         }
2181
2182 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2183         {
2184         ctx->default_passwd_callback_userdata=u;
2185         }
2186
2187 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2188         {
2189         ctx->app_verify_callback=cb;
2190         ctx->app_verify_arg=arg;
2191         }
2192
2193 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2194         {
2195         ctx->verify_mode=mode;
2196         ctx->default_verify_callback=cb;
2197         }
2198
2199 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2200         {
2201         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2202         }
2203
2204 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2205         {
2206         ssl_cert_set_cert_cb(c->cert, cb, arg);
2207         }
2208
2209 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2210         {
2211         ssl_cert_set_cert_cb(s->cert, cb, arg);
2212         }
2213
2214 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2215         {
2216         CERT_PKEY *cpk;
2217         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2218         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2219         int rsa_tmp_export,dh_tmp_export,kl;
2220         unsigned long mask_k,mask_a,emask_k,emask_a;
2221 #ifndef OPENSSL_NO_ECDSA
2222         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2223 #endif
2224 #ifndef OPENSSL_NO_ECDH
2225         int have_ecdh_tmp, ecdh_ok;
2226 #endif
2227 #ifndef OPENSSL_NO_EC
2228         X509 *x = NULL;
2229         EVP_PKEY *ecc_pkey = NULL;
2230         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2231 #endif
2232         if (c == NULL) return;
2233
2234         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2235
2236 #ifndef OPENSSL_NO_RSA
2237         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2238         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2239                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2240 #else
2241         rsa_tmp=rsa_tmp_export=0;
2242 #endif
2243 #ifndef OPENSSL_NO_DH
2244         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2245         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2246                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2247 #else
2248         dh_tmp=dh_tmp_export=0;
2249 #endif
2250
2251 #ifndef OPENSSL_NO_ECDH
2252         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2253 #endif
2254         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2255         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2256         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2257         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2258         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2259         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2260         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2261         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2262         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2263         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2264         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2265 /* FIX THIS EAY EAY EAY */
2266         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2267         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2268         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2269 #ifndef OPENSSL_NO_EC
2270         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2271 #endif
2272         mask_k=0;
2273         mask_a=0;
2274         emask_k=0;
2275         emask_a=0;
2276
2277
2278
2279 #ifdef CIPHER_DEBUG
2280         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2281                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2282                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2283 #endif
2284
2285         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2286         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2287                 mask_k |= SSL_kGOST;
2288                 mask_a |= SSL_aGOST01;
2289         }
2290         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2291         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2292                 mask_k |= SSL_kGOST;
2293                 mask_a |= SSL_aGOST94;
2294         }
2295
2296         if (rsa_enc || (rsa_tmp && rsa_sign))
2297                 mask_k|=SSL_kRSA;
2298         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2299                 emask_k|=SSL_kRSA;
2300
2301 #if 0
2302         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2303         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2304                 (rsa_enc || rsa_sign || dsa_sign))
2305                 mask_k|=SSL_kEDH;
2306         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2307                 (rsa_enc || rsa_sign || dsa_sign))
2308                 emask_k|=SSL_kEDH;
2309 #endif
2310
2311         if (dh_tmp_export)
2312                 emask_k|=SSL_kEDH;
2313
2314         if (dh_tmp)
2315                 mask_k|=SSL_kEDH;
2316
2317         if (dh_rsa) mask_k|=SSL_kDHr;
2318         if (dh_rsa_export) emask_k|=SSL_kDHr;
2319
2320         if (dh_dsa) mask_k|=SSL_kDHd;
2321         if (dh_dsa_export) emask_k|=SSL_kDHd;
2322
2323         if (emask_k & (SSL_kDHr|SSL_kDHd))
2324                 mask_a |= SSL_aDH;
2325
2326         if (rsa_enc || rsa_sign)
2327                 {
2328                 mask_a|=SSL_aRSA;
2329                 emask_a|=SSL_aRSA;
2330                 }
2331
2332         if (dsa_sign)
2333                 {
2334                 mask_a|=SSL_aDSS;
2335                 emask_a|=SSL_aDSS;
2336                 }
2337
2338         mask_a|=SSL_aNULL;
2339         emask_a|=SSL_aNULL;
2340
2341 #ifndef OPENSSL_NO_KRB5
2342         mask_k|=SSL_kKRB5;
2343         mask_a|=SSL_aKRB5;
2344         emask_k|=SSL_kKRB5;
2345         emask_a|=SSL_aKRB5;
2346 #endif
2347
2348         /* An ECC certificate may be usable for ECDH and/or
2349          * ECDSA cipher suites depending on the key usage extension.
2350          */
2351 #ifndef OPENSSL_NO_EC
2352         if (have_ecc_cert)
2353                 {
2354                 cpk = &c->pkeys[SSL_PKEY_ECC];
2355                 x = cpk->x509;
2356                 /* This call populates extension flags (ex_flags) */
2357                 X509_check_purpose(x, -1, 0);
2358                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2359                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2360                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2361                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2362                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2363                         ecdsa_ok = 0;
2364                 ecc_pkey = X509_get_pubkey(x);
2365                 ecc_pkey_size = (ecc_pkey != NULL) ?
2366                     EVP_PKEY_bits(ecc_pkey) : 0;
2367                 EVP_PKEY_free(ecc_pkey);
2368                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2369                         {
2370                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2371                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2372                         }
2373 #ifndef OPENSSL_NO_ECDH
2374                 if (ecdh_ok)
2375                         {
2376
2377                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2378                                 {
2379                                 mask_k|=SSL_kECDHr;
2380                                 mask_a|=SSL_aECDH;
2381                                 if (ecc_pkey_size <= 163)
2382                                         {
2383                                         emask_k|=SSL_kECDHr;
2384                                         emask_a|=SSL_aECDH;
2385                                         }
2386                                 }
2387
2388                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2389                                 {
2390                                 mask_k|=SSL_kECDHe;
2391                                 mask_a|=SSL_aECDH;
2392                                 if (ecc_pkey_size <= 163)
2393                                         {
2394                                         emask_k|=SSL_kECDHe;
2395                                         emask_a|=SSL_aECDH;
2396                                         }
2397                                 }
2398                         }
2399 #endif
2400 #ifndef OPENSSL_NO_ECDSA
2401                 if (ecdsa_ok)
2402                         {
2403                         mask_a|=SSL_aECDSA;
2404                         emask_a|=SSL_aECDSA;
2405                         }
2406 #endif
2407                 }
2408 #endif
2409
2410 #ifndef OPENSSL_NO_ECDH
2411         if (have_ecdh_tmp)
2412                 {
2413                 mask_k|=SSL_kEECDH;
2414                 emask_k|=SSL_kEECDH;
2415                 }
2416 #endif
2417
2418 #ifndef OPENSSL_NO_PSK
2419         mask_k |= SSL_kPSK;
2420         mask_a |= SSL_aPSK;
2421         emask_k |= SSL_kPSK;
2422         emask_a |= SSL_aPSK;
2423 #endif
2424
2425         c->mask_k=mask_k;
2426         c->mask_a=mask_a;
2427         c->export_mask_k=emask_k;
2428         c->export_mask_a=emask_a;
2429         c->valid=1;
2430         }
2431
2432 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2433 #define ku_reject(x, usage) \
2434         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2435
2436 #ifndef OPENSSL_NO_EC
2437
2438 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2439         {
2440         unsigned long alg_k, alg_a;
2441         EVP_PKEY *pkey = NULL;
2442         int keysize = 0;
2443         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2444         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2445
2446         alg_k = cs->algorithm_mkey;
2447         alg_a = cs->algorithm_auth;
2448
2449         if (SSL_C_IS_EXPORT(cs))
2450                 {
2451                 /* ECDH key length in export ciphers must be <= 163 bits */
2452                 pkey = X509_get_pubkey(x);
2453                 if (pkey == NULL) return 0;
2454                 keysize = EVP_PKEY_bits(pkey);
2455                 EVP_PKEY_free(pkey);
2456                 if (keysize > 163) return 0;
2457                 }
2458
2459         /* This call populates the ex_flags field correctly */
2460         X509_check_purpose(x, -1, 0);
2461         if ((x->sig_alg) && (x->sig_alg->algorithm))
2462                 {
2463                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2464                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2465                 }
2466         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2467                 {
2468                 /* key usage, if present, must allow key agreement */
2469                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2470                         {
2471                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2472                         return 0;
2473                         }
2474                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2475                         {
2476                         /* signature alg must be ECDSA */
2477                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2478                                 {
2479                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2480                                 return 0;
2481                                 }
2482                         }
2483                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2484                         {
2485                         /* signature alg must be RSA */
2486
2487                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2488                                 {
2489                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2490                                 return 0;
2491                                 }
2492                         }
2493                 }
2494         if (alg_a & SSL_aECDSA)
2495                 {
2496                 /* key usage, if present, must allow signing */
2497                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2498                         {
2499                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2500                         return 0;
2501                         }
2502                 }
2503
2504         return 1;  /* all checks are ok */
2505         }
2506
2507 #endif
2508
2509 static int ssl_get_server_cert_index(const SSL *s)
2510         {
2511         int idx;
2512         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2513         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2514                 idx = SSL_PKEY_RSA_SIGN;
2515         if (idx == -1)
2516                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2517         return idx;
2518         }
2519
2520 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2521         {
2522         CERT *c;
2523         int i;
2524
2525         c = s->cert;
2526         if (!s->s3 || !s->s3->tmp.new_cipher)
2527                 return NULL;
2528         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2529
2530 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2531         /* Broken protocol test: return last used certificate: which may
2532          * mismatch the one expected.
2533          */
2534         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2535                 return c->key;
2536 #endif
2537
2538         i = ssl_get_server_cert_index(s);
2539
2540         /* This may or may not be an error. */
2541         if (i < 0)
2542                 return NULL;
2543
2544         /* May be NULL. */
2545         return &c->pkeys[i];
2546         }
2547
2548 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2549         {
2550         unsigned long alg_a;
2551         CERT *c;
2552         int idx = -1;
2553
2554         alg_a = cipher->algorithm_auth;
2555         c=s->cert;
2556
2557 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2558         /* Broken protocol test: use last key: which may
2559          * mismatch the one expected.
2560          */
2561         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2562                 idx = c->key - c->pkeys;
2563         else
2564 #endif
2565
2566         if ((alg_a & SSL_aDSS) &&
2567                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2568                 idx = SSL_PKEY_DSA_SIGN;
2569         else if (alg_a & SSL_aRSA)
2570                 {
2571                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2572                         idx = SSL_PKEY_RSA_SIGN;
2573                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2574                         idx = SSL_PKEY_RSA_ENC;
2575                 }
2576         else if ((alg_a & SSL_aECDSA) &&
2577                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2578                 idx = SSL_PKEY_ECC;
2579         if (idx == -1)
2580                 {
2581                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2582                 return(NULL);
2583                 }
2584         if (pmd)
2585                 *pmd = c->pkeys[idx].digest;
2586         return c->pkeys[idx].privatekey;
2587         }
2588
2589 #ifndef OPENSSL_NO_TLSEXT
2590 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2591                                    size_t *serverinfo_length)
2592         {
2593         CERT *c = NULL;
2594         int i = 0;
2595         *serverinfo_length = 0;
2596
2597         c = s->cert;
2598         i = ssl_get_server_cert_index(s);
2599
2600         if (i == -1)
2601                 return 0;
2602         if (c->pkeys[i].serverinfo == NULL)
2603                 return 0;
2604
2605         *serverinfo = c->pkeys[i].serverinfo;
2606         *serverinfo_length = c->pkeys[i].serverinfo_length;
2607         return 1;
2608         }
2609 #endif
2610
2611 void ssl_update_cache(SSL *s,int mode)
2612         {
2613         int i;
2614
2615         /* If the session_id_length is 0, we are not supposed to cache it,
2616          * and it would be rather hard to do anyway :-) */
2617         if (s->session->session_id_length == 0) return;
2618
2619         i=s->session_ctx->session_cache_mode;
2620         if ((i & mode) && (!s->hit)
2621                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2622                     || SSL_CTX_add_session(s->session_ctx,s->session))
2623                 && (s->session_ctx->new_session_cb != NULL))
2624                 {
2625                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2626                 if (!s->session_ctx->new_session_cb(s,s->session))
2627                         SSL_SESSION_free(s->session);
2628                 }
2629
2630         /* auto flush every 255 connections */
2631         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2632                 ((i & mode) == mode))
2633                 {
2634                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2635                         ?s->session_ctx->stats.sess_connect_good
2636                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2637                         {
2638                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2639                         }
2640                 }
2641         }
2642
2643 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2644         {
2645         return ctx->method;
2646         }
2647
2648 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2649         {
2650         return(s->method);
2651         }
2652
2653 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2654         {
2655         int conn= -1;
2656         int ret=1;
2657
2658         if (s->method != meth)
2659                 {
2660                 if (s->handshake_func != NULL)
2661                         conn=(s->handshake_func == s->method->ssl_connect);
2662
2663                 if (s->method->version == meth->version)
2664                         s->method=meth;
2665                 else
2666                         {
2667                         s->method->ssl_free(s);
2668                         s->method=meth;
2669                         ret=s->method->ssl_new(s);
2670                         }
2671
2672                 if (conn == 1)
2673                         s->handshake_func=meth->ssl_connect;
2674                 else if (conn == 0)
2675                         s->handshake_func=meth->ssl_accept;
2676                 }
2677         return(ret);
2678         }
2679
2680 int SSL_get_error(const SSL *s,int i)
2681         {
2682         int reason;
2683         unsigned long l;
2684         BIO *bio;
2685
2686         if (i > 0) return(SSL_ERROR_NONE);
2687
2688         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2689          * etc, where we do encode the error */
2690         if ((l=ERR_peek_error()) != 0)
2691                 {
2692                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2693                         return(SSL_ERROR_SYSCALL);
2694                 else
2695                         return(SSL_ERROR_SSL);
2696                 }
2697
2698         if ((i < 0) && SSL_want_read(s))
2699                 {
2700                 bio=SSL_get_rbio(s);
2701                 if (BIO_should_read(bio))
2702                         return(SSL_ERROR_WANT_READ);
2703                 else if (BIO_should_write(bio))
2704                         /* This one doesn't make too much sense ... We never try
2705                          * to write to the rbio, and an application program where
2706                          * rbio and wbio are separate couldn't even know what it
2707                          * should wait for.
2708                          * However if we ever set s->rwstate incorrectly
2709                          * (so that we have SSL_want_read(s) instead of
2710                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2711                          * this test works around that bug; so it might be safer
2712                          * to keep it. */
2713                         return(SSL_ERROR_WANT_WRITE);
2714                 else if (BIO_should_io_special(bio))
2715                         {
2716                         reason=BIO_get_retry_reason(bio);
2717                         if (reason == BIO_RR_CONNECT)
2718                                 return(SSL_ERROR_WANT_CONNECT);
2719                         else if (reason == BIO_RR_ACCEPT)
2720                                 return(SSL_ERROR_WANT_ACCEPT);
2721                         else
2722                                 return(SSL_ERROR_SYSCALL); /* unknown */
2723                         }
2724                 }
2725
2726         if ((i < 0) && SSL_want_write(s))
2727                 {
2728                 bio=SSL_get_wbio(s);
2729                 if (BIO_should_write(bio))
2730                         return(SSL_ERROR_WANT_WRITE);
2731                 else if (BIO_should_read(bio))
2732                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2733                         return(SSL_ERROR_WANT_READ);
2734                 else if (BIO_should_io_special(bio))
2735                         {
2736                         reason=BIO_get_retry_reason(bio);
2737                         if (reason == BIO_RR_CONNECT)
2738                                 return(SSL_ERROR_WANT_CONNECT);
2739                         else if (reason == BIO_RR_ACCEPT)
2740                                 return(SSL_ERROR_WANT_ACCEPT);
2741                         else
2742                                 return(SSL_ERROR_SYSCALL);
2743                         }
2744                 }
2745         if ((i < 0) && SSL_want_x509_lookup(s))
2746                 {
2747                 return(SSL_ERROR_WANT_X509_LOOKUP);
2748                 }
2749
2750         if (i == 0)
2751                 {
2752                 if (s->version == SSL2_VERSION)
2753                         {
2754                         /* assume it is the socket being closed */
2755                         return(SSL_ERROR_ZERO_RETURN);
2756                         }
2757                 else
2758                         {
2759                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2760                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2761                                 return(SSL_ERROR_ZERO_RETURN);
2762                         }
2763                 }
2764         return(SSL_ERROR_SYSCALL);
2765         }
2766
2767 int SSL_do_handshake(SSL *s)
2768         {
2769         int ret=1;
2770
2771         if (s->handshake_func == NULL)
2772                 {
2773                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2774                 return(-1);
2775                 }
2776
2777         s->method->ssl_renegotiate_check(s);
2778
2779         if (SSL_in_init(s) || SSL_in_before(s))
2780                 {
2781                 ret=s->handshake_func(s);
2782                 }
2783         return(ret);
2784         }
2785
2786 /* For the next 2 functions, SSL_clear() sets shutdown and so
2787  * one of these calls will reset it */
2788 void SSL_set_accept_state(SSL *s)
2789         {
2790         s->server=1;
2791         s->shutdown=0;
2792         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2793         s->handshake_func=s->method->ssl_accept;
2794         /* clear the current cipher */
2795         ssl_clear_cipher_ctx(s);
2796         ssl_clear_hash_ctx(&s->read_hash);
2797         ssl_clear_hash_ctx(&s->write_hash);
2798         }
2799
2800 void SSL_set_connect_state(SSL *s)
2801         {
2802         s->server=0;
2803         s->shutdown=0;
2804         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2805         s->handshake_func=s->method->ssl_connect;
2806         /* clear the current cipher */
2807         ssl_clear_cipher_ctx(s);
2808         ssl_clear_hash_ctx(&s->read_hash);
2809         ssl_clear_hash_ctx(&s->write_hash);
2810         }
2811
2812 int ssl_undefined_function(SSL *s)
2813         {
2814         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2815         return(0);
2816         }
2817
2818 int ssl_undefined_void_function(void)
2819         {
2820         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2821         return(0);
2822         }
2823
2824 int ssl_undefined_const_function(const SSL *s)
2825         {
2826         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2827         return(0);
2828         }
2829
2830 SSL_METHOD *ssl_bad_method(int ver)
2831         {
2832         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2833         return(NULL);
2834         }
2835
2836 const char *SSL_get_version(const SSL *s)
2837         {
2838         if (s->version == TLS1_2_VERSION)
2839                 return("TLSv1.2");
2840         else if (s->version == TLS1_1_VERSION)
2841                 return("TLSv1.1");
2842         else if (s->version == TLS1_VERSION)
2843                 return("TLSv1");
2844         else if (s->version == SSL3_VERSION)
2845                 return("SSLv3");
2846         else if (s->version == SSL2_VERSION)
2847                 return("SSLv2");
2848         else
2849                 return("unknown");
2850         }
2851
2852 SSL *SSL_dup(SSL *s)
2853         {
2854         STACK_OF(X509_NAME) *sk;
2855         X509_NAME *xn;
2856         SSL *ret;
2857         int i;
2858
2859         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2860             return(NULL);
2861
2862         ret->version = s->version;
2863         ret->type = s->type;
2864         ret->method = s->method;
2865
2866         if (s->session != NULL)
2867                 {
2868                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2869                 SSL_copy_session_id(ret,s);
2870                 }
2871         else
2872                 {
2873                 /* No session has been established yet, so we have to expect
2874                  * that s->cert or ret->cert will be changed later --
2875                  * they should not both point to the same object,
2876                  * and thus we can't use SSL_copy_session_id. */
2877
2878                 ret->method->ssl_free(ret);
2879                 ret->method = s->method;
2880                 ret->method->ssl_new(ret);
2881
2882                 if (s->cert != NULL)
2883                         {
2884                         if (ret->cert != NULL)
2885                                 {
2886                                 ssl_cert_free(ret->cert);
2887                                 }
2888                         ret->cert = ssl_cert_dup(s->cert);
2889                         if (ret->cert == NULL)
2890                                 goto err;
2891                         }
2892
2893                 SSL_set_session_id_context(ret,
2894                         s->sid_ctx, s->sid_ctx_length);
2895                 }
2896
2897         ret->options=s->options;
2898         ret->mode=s->mode;
2899         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2900         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2901         ret->msg_callback = s->msg_callback;
2902         ret->msg_callback_arg = s->msg_callback_arg;
2903         SSL_set_verify(ret,SSL_get_verify_mode(s),
2904                 SSL_get_verify_callback(s));
2905         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2906         ret->generate_session_id = s->generate_session_id;
2907
2908         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2909
2910         ret->debug=s->debug;
2911
2912         /* copy app data, a little dangerous perhaps */
2913         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2914                 goto err;
2915
2916         /* setup rbio, and wbio */
2917         if (s->rbio != NULL)
2918                 {
2919                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2920                         goto err;
2921                 }
2922         if (s->wbio != NULL)
2923                 {
2924                 if (s->wbio != s->rbio)
2925                         {
2926                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2927                                 goto err;
2928                         }
2929                 else
2930                         ret->wbio=ret->rbio;
2931                 }
2932         ret->rwstate = s->rwstate;
2933         ret->in_handshake = s->in_handshake;
2934         ret->handshake_func = s->handshake_func;
2935         ret->server = s->server;
2936         ret->renegotiate = s->renegotiate;
2937         ret->new_session = s->new_session;
2938         ret->quiet_shutdown = s->quiet_shutdown;
2939         ret->shutdown=s->shutdown;
2940         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2941         ret->rstate=s->rstate;
2942         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2943         ret->hit=s->hit;
2944
2945         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2946
2947         /* dup the cipher_list and cipher_list_by_id stacks */
2948         if (s->cipher_list != NULL)
2949                 {
2950                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2951                         goto err;
2952                 }
2953         if (s->cipher_list_by_id != NULL)
2954                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2955                         == NULL)
2956                         goto err;
2957
2958         /* Dup the client_CA list */
2959         if (s->client_CA != NULL)
2960                 {
2961                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2962                 ret->client_CA=sk;
2963                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2964                         {
2965                         xn=sk_X509_NAME_value(sk,i);
2966                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2967                                 {
2968                                 X509_NAME_free(xn);
2969                                 goto err;
2970                                 }
2971                         }
2972                 }
2973
2974         if (0)
2975                 {
2976 err:
2977                 if (ret != NULL) SSL_free(ret);
2978                 ret=NULL;
2979                 }
2980         return(ret);
2981         }
2982
2983 void ssl_clear_cipher_ctx(SSL *s)
2984         {
2985         if (s->enc_read_ctx != NULL)
2986                 {
2987                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2988                 OPENSSL_free(s->enc_read_ctx);
2989                 s->enc_read_ctx=NULL;
2990                 }
2991         if (s->enc_write_ctx != NULL)
2992                 {
2993                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2994                 OPENSSL_free(s->enc_write_ctx);
2995                 s->enc_write_ctx=NULL;
2996                 }
2997 #ifndef OPENSSL_NO_COMP
2998         if (s->expand != NULL)
2999                 {
3000                 COMP_CTX_free(s->expand);
3001                 s->expand=NULL;
3002                 }
3003         if (s->compress != NULL)
3004                 {
3005                 COMP_CTX_free(s->compress);
3006                 s->compress=NULL;
3007                 }
3008 #endif
3009         }
3010
3011 X509 *SSL_get_certificate(const SSL *s)
3012         {
3013         if (s->cert != NULL)
3014                 return(s->cert->key->x509);
3015         else
3016                 return(NULL);
3017         }
3018
3019 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3020         {
3021         if (s->cert != NULL)
3022                 return(s->cert->key->privatekey);
3023         else
3024                 return(NULL);
3025         }
3026
3027 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3028         {
3029         if (ctx->cert != NULL)
3030                 return ctx->cert->key->x509;
3031         else
3032                 return NULL;
3033         }
3034
3035 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3036         {
3037         if (ctx->cert != NULL)
3038                 return ctx->cert->key->privatekey;
3039         else
3040                 return NULL ;
3041         }
3042
3043 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3044         {
3045         if ((s->session != NULL) && (s->session->cipher != NULL))
3046                 return(s->session->cipher);
3047         return(NULL);
3048         }
3049 #ifdef OPENSSL_NO_COMP
3050 const void *SSL_get_current_compression(SSL *s)
3051         {
3052         return NULL;
3053         }
3054 const void *SSL_get_current_expansion(SSL *s)
3055         {
3056         return NULL;
3057         }
3058 #else
3059
3060 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3061         {
3062         if (s->compress != NULL)
3063                 return(s->compress->meth);
3064         return(NULL);
3065         }
3066
3067 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3068         {
3069         if (s->expand != NULL)
3070                 return(s->expand->meth);
3071         return(NULL);
3072         }
3073 #endif
3074
3075 int ssl_init_wbio_buffer(SSL *s,int push)
3076         {
3077         BIO *bbio;
3078
3079         if (s->bbio == NULL)
3080                 {
3081                 bbio=BIO_new(BIO_f_buffer());
3082                 if (bbio == NULL) return(0);
3083                 s->bbio=bbio;
3084                 }
3085         else
3086                 {
3087                 bbio=s->bbio;
3088                 if (s->bbio == s->wbio)
3089                         s->wbio=BIO_pop(s->wbio);
3090                 }
3091         (void)BIO_reset(bbio);
3092 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3093         if (!BIO_set_read_buffer_size(bbio,1))
3094                 {
3095                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3096                 return(0);
3097                 }
3098         if (push)
3099                 {
3100                 if (s->wbio != bbio)
3101                         s->wbio=BIO_push(bbio,s->wbio);
3102                 }
3103         else
3104                 {
3105                 if (s->wbio == bbio)
3106                         s->wbio=BIO_pop(bbio);
3107                 }
3108         return(1);
3109         }
3110
3111 void ssl_free_wbio_buffer(SSL *s)
3112         {
3113         if (s->bbio == NULL) return;
3114
3115         if (s->bbio == s->wbio)
3116                 {
3117                 /* remove buffering */
3118                 s->wbio=BIO_pop(s->wbio);
3119 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3120                 assert(s->wbio != NULL);
3121 #endif
3122         }
3123         BIO_free(s->bbio);
3124         s->bbio=NULL;
3125         }
3126
3127 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3128         {
3129         ctx->quiet_shutdown=mode;
3130         }
3131
3132 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3133         {
3134         return(ctx->quiet_shutdown);
3135         }
3136
3137 void SSL_set_quiet_shutdown(SSL *s,int mode)
3138         {
3139         s->quiet_shutdown=mode;
3140         }
3141
3142 int SSL_get_quiet_shutdown(const SSL *s)
3143         {
3144         return(s->quiet_shutdown);
3145         }
3146
3147 void SSL_set_shutdown(SSL *s,int mode)
3148         {
3149         s->shutdown=mode;
3150         }
3151
3152 int SSL_get_shutdown(const SSL *s)
3153         {
3154         return(s->shutdown);
3155         }
3156
3157 int SSL_version(const SSL *s)
3158         {
3159         return(s->version);
3160         }
3161
3162 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3163         {
3164         return(ssl->ctx);
3165         }
3166
3167 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3168         {
3169         CERT *ocert = ssl->cert;
3170         if (ssl->ctx == ctx)
3171                 return ssl->ctx;
3172 #ifndef OPENSSL_NO_TLSEXT
3173         if (ctx == NULL)
3174                 ctx = ssl->initial_ctx;
3175 #endif
3176         ssl->cert = ssl_cert_dup(ctx->cert);
3177         if (ocert)
3178                 {
3179                 /* Preserve any already negotiated parameters */
3180                 if (ssl->server)
3181                         {
3182                         ssl->cert->peer_sigalgs = ocert->peer_sigalgs;
3183                         ssl->cert->peer_sigalgslen = ocert->peer_sigalgslen;
3184                         ocert->peer_sigalgs = NULL;
3185                         ssl->cert->ciphers_raw = ocert->ciphers_raw;
3186                         ssl->cert->ciphers_rawlen = ocert->ciphers_rawlen;
3187                         ocert->ciphers_raw = NULL;
3188                         }
3189                 ssl_cert_free(ocert);
3190                 }
3191         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3192         if (ssl->ctx != NULL)
3193                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3194         ssl->ctx = ctx;
3195         return(ssl->ctx);
3196         }
3197
3198 #ifndef OPENSSL_NO_STDIO
3199 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3200         {
3201         return(X509_STORE_set_default_paths(ctx->cert_store));
3202         }
3203
3204 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3205                 const char *CApath)
3206         {
3207         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3208         }
3209 #endif
3210
3211 void SSL_set_info_callback(SSL *ssl,
3212         void (*cb)(const SSL *ssl,int type,int val))
3213         {
3214         ssl->info_callback=cb;
3215         }
3216
3217 /* One compiler (Diab DCC) doesn't like argument names in returned
3218    function pointer.  */
3219 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3220         {
3221         return ssl->info_callback;
3222         }
3223
3224 int SSL_state(const SSL *ssl)
3225         {
3226         return(ssl->state);
3227         }
3228
3229 void SSL_set_state(SSL *ssl, int state)
3230         {
3231         ssl->state = state;
3232         }
3233
3234 void SSL_set_verify_result(SSL *ssl,long arg)
3235         {
3236         ssl->verify_result=arg;
3237         }
3238
3239 long SSL_get_verify_result(const SSL *ssl)
3240         {
3241         return(ssl->verify_result);
3242         }
3243
3244 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3245                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3246         {
3247         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3248                                 new_func, dup_func, free_func);
3249         }
3250
3251 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3252         {
3253         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3254         }
3255
3256 void *SSL_get_ex_data(const SSL *s,int idx)
3257         {
3258         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3259         }
3260
3261 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3262                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3263         {
3264         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3265                                 new_func, dup_func, free_func);
3266         }
3267
3268 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3269         {
3270         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3271         }
3272
3273 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3274         {
3275         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3276         }
3277
3278 int ssl_ok(SSL *s)
3279         {
3280         return(1);
3281         }
3282
3283 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3284         {
3285         return(ctx->cert_store);
3286         }
3287
3288 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3289         {
3290         if (ctx->cert_store != NULL)
3291                 X509_STORE_free(ctx->cert_store);
3292         ctx->cert_store=store;
3293         }
3294
3295 int SSL_want(const SSL *s)
3296         {
3297         return(s->rwstate);
3298         }
3299
3300 /*!
3301  * \brief Set the callback for generating temporary RSA keys.
3302  * \param ctx the SSL context.
3303  * \param cb the callback
3304  */
3305
3306 #ifndef OPENSSL_NO_RSA
3307 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3308                                                           int is_export,
3309                                                           int keylength))
3310     {
3311     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3312     }
3313
3314 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3315                                                   int is_export,
3316                                                   int keylength))
3317     {
3318     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3319     }
3320 #endif
3321
3322 #ifdef DOXYGEN
3323 /*!
3324  * \brief The RSA temporary key callback function.
3325  * \param ssl the SSL session.
3326  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3327  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3328  * of the required key in bits.
3329  * \return the temporary RSA key.
3330  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3331  */
3332
3333 RSA *cb(SSL *ssl,int is_export,int keylength)
3334     {}
3335 #endif
3336
3337 /*!
3338  * \brief Set the callback for generating temporary DH keys.
3339  * \param ctx the SSL context.
3340  * \param dh the callback
3341  */
3342
3343 #ifndef OPENSSL_NO_DH
3344 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3345                                                         int keylength))
3346         {
3347         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3348         }
3349
3350 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3351                                                 int keylength))
3352         {
3353         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3354         }
3355 #endif
3356
3357 #ifndef OPENSSL_NO_ECDH
3358 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3359                                                                 int keylength))
3360         {
3361         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3362         }
3363
3364 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3365                                                         int keylength))
3366         {
3367         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3368         }
3369 #endif
3370
3371 #ifndef OPENSSL_NO_PSK
3372 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3373         {
3374         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3375                 {
3376                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3377                 return 0;
3378                 }
3379         if (ctx->psk_identity_hint != NULL)
3380                 OPENSSL_free(ctx->psk_identity_hint);
3381         if (identity_hint != NULL)
3382                 {
3383                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3384                 if (ctx->psk_identity_hint == NULL)
3385                         return 0;
3386                 }
3387         else
3388                 ctx->psk_identity_hint = NULL;
3389         return 1;
3390         }
3391
3392 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3393         {
3394         if (s == NULL)
3395                 return 0;
3396
3397         if (s->session == NULL)
3398                 return 1; /* session not created yet, ignored */
3399
3400         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3401                 {
3402                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3403                 return 0;
3404                 }
3405         if (s->session->psk_identity_hint != NULL)
3406                 OPENSSL_free(s->session->psk_identity_hint);
3407         if (identity_hint != NULL)
3408                 {
3409                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3410                 if (s->session->psk_identity_hint == NULL)
3411                         return 0;
3412                 }
3413         else
3414                 s->session->psk_identity_hint = NULL;
3415         return 1;
3416         }
3417
3418 const char *SSL_get_psk_identity_hint(const SSL *s)
3419         {
3420         if (s == NULL || s->session == NULL)
3421                 return NULL;
3422         return(s->session->psk_identity_hint);
3423         }
3424
3425 const char *SSL_get_psk_identity(const SSL *s)
3426         {
3427         if (s == NULL || s->session == NULL)
3428                 return NULL;
3429         return(s->session->psk_identity);
3430         }
3431
3432 void SSL_set_psk_client_callback(SSL *s,
3433     unsigned int (*cb)(SSL *ssl, const char *hint,
3434                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3435                        unsigned int max_psk_len))
3436         {
3437         s->psk_client_callback = cb;
3438         }
3439
3440 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3441     unsigned int (*cb)(SSL *ssl, const char *hint,
3442                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3443                        unsigned int max_psk_len))
3444         {
3445         ctx->psk_client_callback = cb;
3446         }
3447
3448 void SSL_set_psk_server_callback(SSL *s,
3449     unsigned int (*cb)(SSL *ssl, const char *identity,
3450                        unsigned char *psk, unsigned int max_psk_len))
3451         {
3452         s->psk_server_callback = cb;
3453         }
3454
3455 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3456     unsigned int (*cb)(SSL *ssl, const char *identity,
3457                        unsigned char *psk, unsigned int max_psk_len))
3458         {
3459         ctx->psk_server_callback = cb;
3460         }
3461 #endif
3462
3463 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))
3464         {
3465         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3466         }
3467 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))
3468         {
3469         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3470         }
3471
3472 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3473  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3474  * any. If EVP_MD pointer is passed, initializes ctx with this md
3475  * Returns newly allocated ctx;
3476  */
3477
3478 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3479 {
3480         ssl_clear_hash_ctx(hash);
3481         *hash = EVP_MD_CTX_create();
3482         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3483         return *hash;
3484 }
3485 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3486 {
3487
3488         if (*hash) EVP_MD_CTX_destroy(*hash);
3489         *hash=NULL;
3490 }
3491
3492 void SSL_set_debug(SSL *s, int debug)
3493         {
3494         s->debug = debug;
3495         }
3496
3497 int SSL_cache_hit(SSL *s)
3498         {
3499         return s->hit;
3500         }
3501
3502 int SSL_is_server(SSL *s)
3503         {
3504         return s->server;
3505         }
3506
3507 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3508 #include "../crypto/bio/bss_file.c"
3509 #endif
3510
3511 IMPLEMENT_STACK_OF(SSL_CIPHER)
3512 IMPLEMENT_STACK_OF(SSL_COMP)
3513 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3514                                     ssl_cipher_id);