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                 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
 267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 268                 {
 269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274
 275 SSL *SSL_new(SSL_CTX *ctx)
 276         {
 277         SSL *s;
 278
 279         if (ctx == NULL)
 280                 {
 281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 282                 return(NULL);
 283                 }
 284         if (ctx->method == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 287                 return(NULL);
 288                 }
 289
 290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 291         if (s == NULL) goto err;
 292         memset(s,0,sizeof(SSL));
 293
 294 #ifndef OPENSSL_NO_KRB5
 295         s->kssl_ctx = kssl_ctx_new();
 296 #endif  /* OPENSSL_NO_KRB5 */
 297
 298         s->options=ctx->options;
 299         s->mode=ctx->mode;
 300         s->max_cert_list=ctx->max_cert_list;
 301
 302         if (ctx->cert != NULL)
 303                 {
 304                 /* Earlier library versions used to copy the pointer to
 305                  * the CERT, not its contents; only when setting new
 306                  * parameters for the per-SSL copy, ssl_cert_new would be
 307                  * called (and the direct reference to the per-SSL_CTX
 308                  * settings would be lost, but those still were indirectly
 309                  * accessed for various purposes, and for that reason they
 310                  * used to be known as s->ctx->default_cert).
 311                  * Now we don't look at the SSL_CTX's CERT after having
 312                  * duplicated it once. */
 313
 314                 s->cert = ssl_cert_dup(ctx->cert);
 315                 if (s->cert == NULL)
 316                         goto err;
 317                 }
 318         else
 319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 320
 321         s->read_ahead=ctx->read_ahead;
 322         s->msg_callback=ctx->msg_callback;
 323         s->msg_callback_arg=ctx->msg_callback_arg;
 324         s->verify_mode=ctx->verify_mode;
 325         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
 326 #if 0
 327         s->verify_depth=ctx->verify_depth;
 328 #endif
 329         s->sid_ctx_length=ctx->sid_ctx_length;
 330         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 331         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 332         s->verify_callback=ctx->default_verify_callback;
 333         s->generate_session_id=ctx->generate_session_id;
 334
 335         s->param = X509_VERIFY_PARAM_new();
 336         if (!s->param)
 337                 goto err;
 338         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 339 #if 0
 340         s->purpose = ctx->purpose;
 341         s->trust = ctx->trust;
 342 #endif
 343         s->quiet_shutdown=ctx->quiet_shutdown;
 344         s->max_send_fragment = ctx->max_send_fragment;
 345
 346         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 347         s->ctx=ctx;
 348 #ifndef OPENSSL_NO_TLSEXT
 349         s->tlsext_debug_cb = 0;
 350         s->tlsext_debug_arg = NULL;
 351         s->tlsext_ticket_expected = 0;
 352         s->tlsext_status_type = -1;
 353         s->tlsext_status_expected = 0;
 354         s->tlsext_ocsp_ids = NULL;
 355         s->tlsext_ocsp_exts = NULL;
 356         s->tlsext_ocsp_resp = NULL;
 357         s->tlsext_ocsp_resplen = -1;
 358         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 359         s->initial_ctx=ctx;
 360 #ifndef OPENSSL_NO_EC
 361         if (ctx->tlsext_ecpointformatlist)
 362                 {
 363                 s->tlsext_ecpointformatlist =
 364                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 365                                         ctx->tlsext_ecpointformatlist_length);
 366                 if (!s->tlsext_ecpointformatlist)
 367                         goto err;
 368                 s->tlsext_ecpointformatlist_length =
 369                                         ctx->tlsext_ecpointformatlist_length;
 370                 }
 371         if (ctx->tlsext_ellipticcurvelist)
 372                 {
 373                 s->tlsext_ellipticcurvelist =
 374                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 375                                         ctx->tlsext_ellipticcurvelist_length);
 376                 if (!s->tlsext_ellipticcurvelist)
 377                         goto err;
 378                 s->tlsext_ellipticcurvelist_length =
 379                                         ctx->tlsext_ellipticcurvelist_length;
 380                 }
 381 #endif
 382 # ifndef OPENSSL_NO_NEXTPROTONEG
 383         s->next_proto_negotiated = NULL;
 384 # endif
 385
 386         if (s->ctx->alpn_client_proto_list)
 387                 {
 388                 s->alpn_client_proto_list =
 389                         OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
 390                 if (s->alpn_client_proto_list == NULL)
 391                         goto err;
 392                 memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
 393                        s->ctx->alpn_client_proto_list_len);
 394                 s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
 395                 }
 396 #endif
 397
 398         s->verify_result=X509_V_OK;
 399
 400         s->method=ctx->method;
 401
 402         if (!s->method->ssl_new(s))
 403                 goto err;
 404
 405         s->references=1;
 406         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 407
 408         SSL_clear(s);
 409
 410         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 411
 412 #ifndef OPENSSL_NO_PSK
 413         s->psk_client_callback=ctx->psk_client_callback;
 414         s->psk_server_callback=ctx->psk_server_callback;
 415 #endif
 416
 417         return(s);
 418 err:
 419         if (s != NULL)
 420                 {
 421                 if (s->cert != NULL)
 422                         ssl_cert_free(s->cert);
 423                 if (s->ctx != NULL)
 424                         SSL_CTX_free(s->ctx); /* decrement reference count */
 425                 OPENSSL_free(s);
 426                 }
 427         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 428         return(NULL);
 429         }
 430
 431 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 432                                    unsigned int sid_ctx_len)
 433     {
 434     if(sid_ctx_len > sizeof ctx->sid_ctx)
 435         {
 436         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 437         return 0;
 438         }
 439     ctx->sid_ctx_length=sid_ctx_len;
 440     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 441
 442     return 1;
 443     }
 444
 445 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 446                                unsigned int sid_ctx_len)
 447     {
 448     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 449         {
 450         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 451         return 0;
 452         }
 453     ssl->sid_ctx_length=sid_ctx_len;
 454     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 455
 456     return 1;
 457     }
 458
 459 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 460         {
 461         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 462         ctx->generate_session_id = cb;
 463         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 464         return 1;
 465         }
 466
 467 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 468         {
 469         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 470         ssl->generate_session_id = cb;
 471         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 472         return 1;
 473         }
 474
 475 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 476                                 unsigned int id_len)
 477         {
 478         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 479          * we can "construct" a session to give us the desired check - ie. to
 480          * find if there's a session in the hash table that would conflict with
 481          * any new session built out of this id/id_len and the ssl_version in
 482          * use by this SSL. */
 483         SSL_SESSION r, *p;
 484
 485         if(id_len > sizeof r.session_id)
 486                 return 0;
 487
 488         r.ssl_version = ssl->version;
 489         r.session_id_length = id_len;
 490         memcpy(r.session_id, id, id_len);
 491
 492         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 493         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 494         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 495         return (p != NULL);
 496         }
 497
 498 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 499         {
 500         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 501         }
 502
 503 int SSL_set_purpose(SSL *s, int purpose)
 504         {
 505         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 506         }
 507
 508 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 509         {
 510         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 511         }
 512
 513 int SSL_set_trust(SSL *s, int trust)
 514         {
 515         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 516         }
 517
 518 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 519         {
 520         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 521         }
 522
 523 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 524         {
 525         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 526         }
 527
 528 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
 529         {
 530         return ctx->param;
 531         }
 532
 533 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
 534         {
 535         return ssl->param;
 536         }
 537
 538 void SSL_certs_clear(SSL *s)
 539         {
 540         ssl_cert_clear_certs(s->cert);
 541         }
 542
 543 void SSL_free(SSL *s)
 544         {
 545         int i;
 546
 547         if(s == NULL)
 548             return;
 549
 550         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 551 #ifdef REF_PRINT
 552         REF_PRINT("SSL",s);
 553 #endif
 554         if (i > 0) return;
 555 #ifdef REF_CHECK
 556         if (i < 0)
 557                 {
 558                 fprintf(stderr,"SSL_free, bad reference count\n");
 559                 abort(); /* ok */
 560                 }
 561 #endif
 562
 563         if (s->param)
 564                 X509_VERIFY_PARAM_free(s->param);
 565
 566         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 567
 568         if (s->bbio != NULL)
 569                 {
 570                 /* If the buffering BIO is in place, pop it off */
 571                 if (s->bbio == s->wbio)
 572                         {
 573                         s->wbio=BIO_pop(s->wbio);
 574                         }
 575                 BIO_free(s->bbio);
 576                 s->bbio=NULL;
 577                 }
 578         if (s->rbio != NULL)
 579                 BIO_free_all(s->rbio);
 580         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 581                 BIO_free_all(s->wbio);
 582
 583         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 584
 585         /* add extra stuff */
 586         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 587         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 588
 589         /* Make the next call work :-) */
 590         if (s->session != NULL)
 591                 {
 592                 ssl_clear_bad_session(s);
 593                 SSL_SESSION_free(s->session);
 594                 }
 595
 596         ssl_clear_cipher_ctx(s);
 597         ssl_clear_hash_ctx(&s->read_hash);
 598         ssl_clear_hash_ctx(&s->write_hash);
 599
 600         if (s->cert != NULL) ssl_cert_free(s->cert);
 601         /* Free up if allocated */
 602
 603 #ifndef OPENSSL_NO_TLSEXT
 604         if (s->tlsext_hostname)
 605                 OPENSSL_free(s->tlsext_hostname);
 606         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 607 #ifndef OPENSSL_NO_EC
 608         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 609         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 610 #endif /* OPENSSL_NO_EC */
 611         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 612         if (s->tlsext_ocsp_exts)
 613                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 614                                                 X509_EXTENSION_free);
 615         if (s->tlsext_ocsp_ids)
 616                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 617         if (s->tlsext_ocsp_resp)
 618                 OPENSSL_free(s->tlsext_ocsp_resp);
 619         if (s->alpn_client_proto_list)
 620                 OPENSSL_free(s->alpn_client_proto_list);
 621 #endif
 622
 623         if (s->client_CA != NULL)
 624                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 625
 626         if (s->method != NULL) s->method->ssl_free(s);
 627
 628         if (s->ctx) SSL_CTX_free(s->ctx);
 629
 630 #ifndef OPENSSL_NO_KRB5
 631         if (s->kssl_ctx != NULL)
 632                 kssl_ctx_free(s->kssl_ctx);
 633 #endif  /* OPENSSL_NO_KRB5 */
 634
 635 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 636         if (s->next_proto_negotiated)
 637                 OPENSSL_free(s->next_proto_negotiated);
 638 #endif
 639
 640         if (s->srtp_profiles)
 641             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 642
 643         OPENSSL_free(s);
 644         }
 645
 646 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 647         {
 648         /* If the output buffering BIO is still in place, remove it
 649          */
 650         if (s->bbio != NULL)
 651                 {
 652                 if (s->wbio == s->bbio)
 653                         {
 654                         s->wbio=s->wbio->next_bio;
 655                         s->bbio->next_bio=NULL;
 656                         }
 657                 }
 658         if ((s->rbio != NULL) && (s->rbio != rbio))
 659                 BIO_free_all(s->rbio);
 660         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 661                 BIO_free_all(s->wbio);
 662         s->rbio=rbio;
 663         s->wbio=wbio;
 664         }
 665
 666 BIO *SSL_get_rbio(const SSL *s)
 667         { return(s->rbio); }
 668
 669 BIO *SSL_get_wbio(const SSL *s)
 670         { return(s->wbio); }
 671
 672 int SSL_get_fd(const SSL *s)
 673         {
 674         return(SSL_get_rfd(s));
 675         }
 676
 677 int SSL_get_rfd(const SSL *s)
 678         {
 679         int ret= -1;
 680         BIO *b,*r;
 681
 682         b=SSL_get_rbio(s);
 683         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 684         if (r != NULL)
 685                 BIO_get_fd(r,&ret);
 686         return(ret);
 687         }
 688
 689 int SSL_get_wfd(const SSL *s)
 690         {
 691         int ret= -1;
 692         BIO *b,*r;
 693
 694         b=SSL_get_wbio(s);
 695         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 696         if (r != NULL)
 697                 BIO_get_fd(r,&ret);
 698         return(ret);
 699         }
 700
 701 #ifndef OPENSSL_NO_SOCK
 702 int SSL_set_fd(SSL *s,int fd)
 703         {
 704         int ret=0;
 705         BIO *bio=NULL;
 706
 707         bio=BIO_new(BIO_s_socket());
 708
 709         if (bio == NULL)
 710                 {
 711                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 712                 goto err;
 713                 }
 714         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 715         SSL_set_bio(s,bio,bio);
 716         ret=1;
 717 err:
 718         return(ret);
 719         }
 720
 721 int SSL_set_wfd(SSL *s,int fd)
 722         {
 723         int ret=0;
 724         BIO *bio=NULL;
 725
 726         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 727                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 728                 {
 729                 bio=BIO_new(BIO_s_socket());
 730
 731                 if (bio == NULL)
 732                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 733                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 734                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 735                 }
 736         else
 737                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 738         ret=1;
 739 err:
 740         return(ret);
 741         }
 742
 743 int SSL_set_rfd(SSL *s,int fd)
 744         {
 745         int ret=0;
 746         BIO *bio=NULL;
 747
 748         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 749                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 750                 {
 751                 bio=BIO_new(BIO_s_socket());
 752
 753                 if (bio == NULL)
 754                         {
 755                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 756                         goto err;
 757                         }
 758                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 759                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 760                 }
 761         else
 762                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 763         ret=1;
 764 err:
 765         return(ret);
 766         }
 767 #endif
 768
 769
 770 /* return length of latest Finished message we sent, copy to 'buf' */
 771 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 772         {
 773         size_t ret = 0;
 774
 775         if (s->s3 != NULL)
 776                 {
 777                 ret = s->s3->tmp.finish_md_len;
 778                 if (count > ret)
 779                         count = ret;
 780                 memcpy(buf, s->s3->tmp.finish_md, count);
 781                 }
 782         return ret;
 783         }
 784
 785 /* return length of latest Finished message we expected, copy to 'buf' */
 786 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 787         {
 788         size_t ret = 0;
 789
 790         if (s->s3 != NULL)
 791                 {
 792                 ret = s->s3->tmp.peer_finish_md_len;
 793                 if (count > ret)
 794                         count = ret;
 795                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 796                 }
 797         return ret;
 798         }
 799
 800
 801 int SSL_get_verify_mode(const SSL *s)
 802         {
 803         return(s->verify_mode);
 804         }
 805
 806 int SSL_get_verify_depth(const SSL *s)
 807         {
 808         return X509_VERIFY_PARAM_get_depth(s->param);
 809         }
 810
 811 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 812         {
 813         return(s->verify_callback);
 814         }
 815
 816 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 817         {
 818         return(ctx->verify_mode);
 819         }
 820
 821 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 822         {
 823         return X509_VERIFY_PARAM_get_depth(ctx->param);
 824         }
 825
 826 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 827         {
 828         return(ctx->default_verify_callback);
 829         }
 830
 831 void SSL_set_verify(SSL *s,int mode,
 832                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 833         {
 834         s->verify_mode=mode;
 835         if (callback != NULL)
 836                 s->verify_callback=callback;
 837         }
 838
 839 void SSL_set_verify_depth(SSL *s,int depth)
 840         {
 841         X509_VERIFY_PARAM_set_depth(s->param, depth);
 842         }
 843
 844 void SSL_set_read_ahead(SSL *s,int yes)
 845         {
 846         s->read_ahead=yes;
 847         }
 848
 849 int SSL_get_read_ahead(const SSL *s)
 850         {
 851         return(s->read_ahead);
 852         }
 853
 854 int SSL_pending(const SSL *s)
 855         {
 856         /* SSL_pending cannot work properly if read-ahead is enabled
 857          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 858          * and it is impossible to fix since SSL_pending cannot report
 859          * errors that may be observed while scanning the new data.
 860          * (Note that SSL_pending() is often used as a boolean value,
 861          * so we'd better not return -1.)
 862          */
 863         return(s->method->ssl_pending(s));
 864         }
 865
 866 X509 *SSL_get_peer_certificate(const SSL *s)
 867         {
 868         X509 *r;
 869
 870         if ((s == NULL) || (s->session == NULL))
 871                 r=NULL;
 872         else
 873                 r=s->session->peer;
 874
 875         if (r == NULL) return(r);
 876
 877         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 878
 879         return(r);
 880         }
 881
 882 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 883         {
 884         STACK_OF(X509) *r;
 885
 886         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 887                 r=NULL;
 888         else
 889                 r=s->session->sess_cert->cert_chain;
 890
 891         /* If we are a client, cert_chain includes the peer's own
 892          * certificate; if we are a server, it does not. */
 893
 894         return(r);
 895         }
 896
 897 /* Now in theory, since the calling process own 't' it should be safe to
 898  * modify.  We need to be able to read f without being hassled */
 899 void SSL_copy_session_id(SSL *t,const SSL *f)
 900         {
 901         CERT *tmp;
 902
 903         /* Do we need to to SSL locking? */
 904         SSL_set_session(t,SSL_get_session(f));
 905
 906         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 907          * vice-versa */
 908         if (t->method != f->method)
 909                 {
 910                 t->method->ssl_free(t); /* cleanup current */
 911                 t->method=f->method;    /* change method */
 912                 t->method->ssl_new(t);  /* setup new */
 913                 }
 914
 915         tmp=t->cert;
 916         if (f->cert != NULL)
 917                 {
 918                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 919                 t->cert=f->cert;
 920                 }
 921         else
 922                 t->cert=NULL;
 923         if (tmp != NULL) ssl_cert_free(tmp);
 924         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 925         }
 926
 927 /* Fix this so it checks all the valid key/cert options */
 928 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 929         {
 930         if (    (ctx == NULL) ||
 931                 (ctx->cert == NULL) ||
 932                 (ctx->cert->key->x509 == NULL))
 933                 {
 934                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 935                 return(0);
 936                 }
 937         if      (ctx->cert->key->privatekey == NULL)
 938                 {
 939                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 940                 return(0);
 941                 }
 942         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 943         }
 944
 945 /* Fix this function so that it takes an optional type parameter */
 946 int SSL_check_private_key(const SSL *ssl)
 947         {
 948         if (ssl == NULL)
 949                 {
 950                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 951                 return(0);
 952                 }
 953         if (ssl->cert == NULL)
 954                 {
 955                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 956                 return 0;
 957                 }
 958         if (ssl->cert->key->x509 == NULL)
 959                 {
 960                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 961                 return(0);
 962                 }
 963         if (ssl->cert->key->privatekey == NULL)
 964                 {
 965                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 966                 return(0);
 967                 }
 968         return(X509_check_private_key(ssl->cert->key->x509,
 969                 ssl->cert->key->privatekey));
 970         }
 971
 972 int SSL_accept(SSL *s)
 973         {
 974         if (s->handshake_func == 0)
 975                 /* Not properly initialized yet */
 976                 SSL_set_accept_state(s);
 977
 978         return(s->method->ssl_accept(s));
 979         }
 980
 981 int SSL_connect(SSL *s)
 982         {
 983         if (s->handshake_func == 0)
 984                 /* Not properly initialized yet */
 985                 SSL_set_connect_state(s);
 986
 987         return(s->method->ssl_connect(s));
 988         }
 989
 990 long SSL_get_default_timeout(const SSL *s)
 991         {
 992         return(s->method->get_timeout());
 993         }
 994
 995 int SSL_read(SSL *s,void *buf,int num)
 996         {
 997         if (s->handshake_func == 0)
 998                 {
 999                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
1000                 return -1;
1001                 }
1002
1003         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1004                 {
1005                 s->rwstate=SSL_NOTHING;
1006                 return(0);
1007                 }
1008         return(s->method->ssl_read(s,buf,num));
1009         }
1010
1011 int SSL_peek(SSL *s,void *buf,int num)
1012         {
1013         if (s->handshake_func == 0)
1014                 {
1015                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1016                 return -1;
1017                 }
1018
1019         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1020                 {
1021                 return(0);
1022                 }
1023         return(s->method->ssl_peek(s,buf,num));
1024         }
1025
1026 int SSL_write(SSL *s,const void *buf,int num)
1027         {
1028         if (s->handshake_func == 0)
1029                 {
1030                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1031                 return -1;
1032                 }
1033
1034         if (s->shutdown & SSL_SENT_SHUTDOWN)
1035                 {
1036                 s->rwstate=SSL_NOTHING;
1037                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1038                 return(-1);
1039                 }
1040         return(s->method->ssl_write(s,buf,num));
1041         }
1042
1043 int SSL_shutdown(SSL *s)
1044         {
1045         /* Note that this function behaves differently from what one might
1046          * expect.  Return values are 0 for no success (yet),
1047          * 1 for success; but calling it once is usually not enough,
1048          * even if blocking I/O is used (see ssl3_shutdown).
1049          */
1050
1051         if (s->handshake_func == 0)
1052                 {
1053                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1054                 return -1;
1055                 }
1056
1057         if ((s != NULL) && !SSL_in_init(s))
1058                 return(s->method->ssl_shutdown(s));
1059         else
1060                 return(1);
1061         }
1062
1063 int SSL_renegotiate(SSL *s)
1064         {
1065         if (s->renegotiate == 0)
1066                 s->renegotiate=1;
1067
1068         s->new_session=1;
1069
1070         return(s->method->ssl_renegotiate(s));
1071         }
1072
1073 int SSL_renegotiate_abbreviated(SSL *s)
1074         {
1075         if (s->renegotiate == 0)
1076                 s->renegotiate=1;
1077
1078         s->new_session=0;
1079
1080         return(s->method->ssl_renegotiate(s));
1081         }
1082
1083 int SSL_renegotiate_pending(SSL *s)
1084         {
1085         /* becomes true when negotiation is requested;
1086          * false again once a handshake has finished */
1087         return (s->renegotiate != 0);
1088         }
1089
1090 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1091         {
1092         long l;
1093
1094         switch (cmd)
1095                 {
1096         case SSL_CTRL_GET_READ_AHEAD:
1097                 return(s->read_ahead);
1098         case SSL_CTRL_SET_READ_AHEAD:
1099                 l=s->read_ahead;
1100                 s->read_ahead=larg;
1101                 return(l);
1102
1103         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1104                 s->msg_callback_arg = parg;
1105                 return 1;
1106
1107         case SSL_CTRL_OPTIONS:
1108                 return(s->options|=larg);
1109         case SSL_CTRL_CLEAR_OPTIONS:
1110                 return(s->options&=~larg);
1111         case SSL_CTRL_MODE:
1112                 return(s->mode|=larg);
1113         case SSL_CTRL_CLEAR_MODE:
1114                 return(s->mode &=~larg);
1115         case SSL_CTRL_GET_MAX_CERT_LIST:
1116                 return(s->max_cert_list);
1117         case SSL_CTRL_SET_MAX_CERT_LIST:
1118                 l=s->max_cert_list;
1119                 s->max_cert_list=larg;
1120                 return(l);
1121         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1122                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1123                         return 0;
1124                 s->max_send_fragment = larg;
1125                 return 1;
1126         case SSL_CTRL_GET_RI_SUPPORT:
1127                 if (s->s3)
1128                         return s->s3->send_connection_binding;
1129                 else return 0;
1130         case SSL_CTRL_CERT_FLAGS:
1131                 return(s->cert->cert_flags|=larg);
1132         case SSL_CTRL_CLEAR_CERT_FLAGS:
1133                 return(s->cert->cert_flags &=~larg);
1134
1135         case SSL_CTRL_GET_RAW_CIPHERLIST:
1136                 if (parg)
1137                         {
1138                         if (s->cert->ciphers_raw == NULL)
1139                                 return 0;
1140                         *(unsigned char **)parg = s->cert->ciphers_raw;
1141                         return (int)s->cert->ciphers_rawlen;
1142                         }
1143                 else
1144                         return ssl_put_cipher_by_char(s,NULL,NULL);
1145         default:
1146                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1147                 }
1148         }
1149
1150 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1151         {
1152         switch(cmd)
1153                 {
1154         case SSL_CTRL_SET_MSG_CALLBACK:
1155                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1156                 return 1;
1157
1158         default:
1159                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1160                 }
1161         }
1162
1163 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1164         {
1165         return ctx->sessions;
1166         }
1167
1168 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1169         {
1170         long l;
1171         /* For some cases with ctx == NULL perform syntax checks */
1172         if (ctx == NULL)
1173                 {
1174                 switch (cmd)
1175                         {
1176 #ifndef OPENSSL_NO_EC
1177                 case SSL_CTRL_SET_CURVES_LIST:
1178                         return tls1_set_curves_list(NULL, NULL, parg);
1179 #endif
1180                 case SSL_CTRL_SET_SIGALGS_LIST:
1181                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1182                         return tls1_set_sigalgs_list(NULL, parg, 0);
1183                 default:
1184                         return 0;
1185                         }
1186                 }
1187
1188         switch (cmd)
1189                 {
1190         case SSL_CTRL_GET_READ_AHEAD:
1191                 return(ctx->read_ahead);
1192         case SSL_CTRL_SET_READ_AHEAD:
1193                 l=ctx->read_ahead;
1194                 ctx->read_ahead=larg;
1195                 return(l);
1196
1197         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1198                 ctx->msg_callback_arg = parg;
1199                 return 1;
1200
1201         case SSL_CTRL_GET_MAX_CERT_LIST:
1202                 return(ctx->max_cert_list);
1203         case SSL_CTRL_SET_MAX_CERT_LIST:
1204                 l=ctx->max_cert_list;
1205                 ctx->max_cert_list=larg;
1206                 return(l);
1207
1208         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1209                 l=ctx->session_cache_size;
1210                 ctx->session_cache_size=larg;
1211                 return(l);
1212         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1213                 return(ctx->session_cache_size);
1214         case SSL_CTRL_SET_SESS_CACHE_MODE:
1215                 l=ctx->session_cache_mode;
1216                 ctx->session_cache_mode=larg;
1217                 return(l);
1218         case SSL_CTRL_GET_SESS_CACHE_MODE:
1219                 return(ctx->session_cache_mode);
1220
1221         case SSL_CTRL_SESS_NUMBER:
1222                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1223         case SSL_CTRL_SESS_CONNECT:
1224                 return(ctx->stats.sess_connect);
1225         case SSL_CTRL_SESS_CONNECT_GOOD:
1226                 return(ctx->stats.sess_connect_good);
1227         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1228                 return(ctx->stats.sess_connect_renegotiate);
1229         case SSL_CTRL_SESS_ACCEPT:
1230                 return(ctx->stats.sess_accept);
1231         case SSL_CTRL_SESS_ACCEPT_GOOD:
1232                 return(ctx->stats.sess_accept_good);
1233         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1234                 return(ctx->stats.sess_accept_renegotiate);
1235         case SSL_CTRL_SESS_HIT:
1236                 return(ctx->stats.sess_hit);
1237         case SSL_CTRL_SESS_CB_HIT:
1238                 return(ctx->stats.sess_cb_hit);
1239         case SSL_CTRL_SESS_MISSES:
1240                 return(ctx->stats.sess_miss);
1241         case SSL_CTRL_SESS_TIMEOUTS:
1242                 return(ctx->stats.sess_timeout);
1243         case SSL_CTRL_SESS_CACHE_FULL:
1244                 return(ctx->stats.sess_cache_full);
1245         case SSL_CTRL_OPTIONS:
1246                 return(ctx->options|=larg);
1247         case SSL_CTRL_CLEAR_OPTIONS:
1248                 return(ctx->options&=~larg);
1249         case SSL_CTRL_MODE:
1250                 return(ctx->mode|=larg);
1251         case SSL_CTRL_CLEAR_MODE:
1252                 return(ctx->mode&=~larg);
1253         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1254                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1255                         return 0;
1256                 ctx->max_send_fragment = larg;
1257                 return 1;
1258         case SSL_CTRL_CERT_FLAGS:
1259                 return(ctx->cert->cert_flags|=larg);
1260         case SSL_CTRL_CLEAR_CERT_FLAGS:
1261                 return(ctx->cert->cert_flags &=~larg);
1262         default:
1263                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1264                 }
1265         }
1266
1267 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1268         {
1269         switch(cmd)
1270                 {
1271         case SSL_CTRL_SET_MSG_CALLBACK:
1272                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1273                 return 1;
1274
1275         default:
1276                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1277                 }
1278         }
1279
1280 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1281         {
1282         long l;
1283
1284         l=a->id-b->id;
1285         if (l == 0L)
1286                 return(0);
1287         else
1288                 return((l > 0)?1:-1);
1289         }
1290
1291 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1292                         const SSL_CIPHER * const *bp)
1293         {
1294         long l;
1295
1296         l=(*ap)->id-(*bp)->id;
1297         if (l == 0L)
1298                 return(0);
1299         else
1300                 return((l > 0)?1:-1);
1301         }
1302
1303 /** return a STACK of the ciphers available for the SSL and in order of
1304  * preference */
1305 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1306         {
1307         if (s != NULL)
1308                 {
1309                 if (s->cipher_list != NULL)
1310                         {
1311                         return(s->cipher_list);
1312                         }
1313                 else if ((s->ctx != NULL) &&
1314                         (s->ctx->cipher_list != NULL))
1315                         {
1316                         return(s->ctx->cipher_list);
1317                         }
1318                 }
1319         return(NULL);
1320         }
1321
1322 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
1323         {
1324         STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
1325         int i;
1326         ciphers = SSL_get_ciphers(s);
1327         if (!ciphers)
1328                 return NULL;
1329         ssl_set_client_disabled(s);
1330         for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
1331                 {
1332                 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
1333                 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
1334                         {
1335                         if (!sk)
1336                                 sk = sk_SSL_CIPHER_new_null();
1337                         if (!sk)
1338                                 return NULL;
1339                         if (!sk_SSL_CIPHER_push(sk, c))
1340                                 {
1341                                 sk_SSL_CIPHER_free(sk);
1342                                 return NULL;
1343                                 }
1344                         }
1345                 }
1346         return sk;
1347         }
1348
1349 /** return a STACK of the ciphers available for the SSL and in order of
1350  * algorithm id */
1351 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1352         {
1353         if (s != NULL)
1354                 {
1355                 if (s->cipher_list_by_id != NULL)
1356                         {
1357                         return(s->cipher_list_by_id);
1358                         }
1359                 else if ((s->ctx != NULL) &&
1360                         (s->ctx->cipher_list_by_id != NULL))
1361                         {
1362                         return(s->ctx->cipher_list_by_id);
1363                         }
1364                 }
1365         return(NULL);
1366         }
1367
1368 /** The old interface to get the same thing as SSL_get_ciphers() */
1369 const char *SSL_get_cipher_list(const SSL *s,int n)
1370         {
1371         SSL_CIPHER *c;
1372         STACK_OF(SSL_CIPHER) *sk;
1373
1374         if (s == NULL) return(NULL);
1375         sk=SSL_get_ciphers(s);
1376         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1377                 return(NULL);
1378         c=sk_SSL_CIPHER_value(sk,n);
1379         if (c == NULL) return(NULL);
1380         return(c->name);
1381         }
1382
1383 /** specify the ciphers to be used by default by the SSL_CTX */
1384 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1385         {
1386         STACK_OF(SSL_CIPHER) *sk;
1387
1388         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1389                 &ctx->cipher_list_by_id,str, ctx->cert);
1390         /* ssl_create_cipher_list may return an empty stack if it
1391          * was unable to find a cipher matching the given rule string
1392          * (for example if the rule string specifies a cipher which
1393          * has been disabled). This is not an error as far as
1394          * ssl_create_cipher_list is concerned, and hence
1395          * ctx->cipher_list and ctx->cipher_list_by_id has been
1396          * updated. */
1397         if (sk == NULL)
1398                 return 0;
1399         else if (sk_SSL_CIPHER_num(sk) == 0)
1400                 {
1401                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1402                 return 0;
1403                 }
1404         return 1;
1405         }
1406
1407 /** specify the ciphers to be used by the SSL */
1408 int SSL_set_cipher_list(SSL *s,const char *str)
1409         {
1410         STACK_OF(SSL_CIPHER) *sk;
1411
1412         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1413                 &s->cipher_list_by_id,str, s->cert);
1414         /* see comment in SSL_CTX_set_cipher_list */
1415         if (sk == NULL)
1416                 return 0;
1417         else if (sk_SSL_CIPHER_num(sk) == 0)
1418                 {
1419                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1420                 return 0;
1421                 }
1422         return 1;
1423         }
1424
1425 /* works well for SSLv2, not so good for SSLv3 */
1426 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1427         {
1428         char *p;
1429         STACK_OF(SSL_CIPHER) *sk;
1430         SSL_CIPHER *c;
1431         int i;
1432
1433         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1434                 (len < 2))
1435                 return(NULL);
1436
1437         p=buf;
1438         sk=s->session->ciphers;
1439
1440         if (sk_SSL_CIPHER_num(sk) == 0)
1441                 return NULL;
1442
1443         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1444                 {
1445                 int n;
1446
1447                 c=sk_SSL_CIPHER_value(sk,i);
1448                 n=strlen(c->name);
1449                 if (n+1 > len)
1450                         {
1451                         if (p != buf)
1452                                 --p;
1453                         *p='\0';
1454                         return buf;
1455                         }
1456                 strcpy(p,c->name);
1457                 p+=n;
1458                 *(p++)=':';
1459                 len-=n+1;
1460                 }
1461         p[-1]='\0';
1462         return(buf);
1463         }
1464
1465 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1466                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1467         {
1468         int i,j=0;
1469         SSL_CIPHER *c;
1470         unsigned char *q;
1471         int empty_reneg_info_scsv = !s->renegotiate;
1472         /* Set disabled masks for this session */
1473         ssl_set_client_disabled(s);
1474
1475         if (sk == NULL) return(0);
1476         q=p;
1477         if (put_cb == NULL)
1478                 put_cb = s->method->put_cipher_by_char;
1479
1480         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1481                 {
1482                 c=sk_SSL_CIPHER_value(sk,i);
1483                 /* Skip disabled ciphers */
1484                 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
1485                         continue;
1486 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1487                 if (c->id == SSL3_CK_SCSV)
1488                         {
1489                         if (!empty_reneg_info_scsv)
1490                                 continue;
1491                         else
1492                                 empty_reneg_info_scsv = 0;
1493                         }
1494 #endif
1495                 j = put_cb(c,p);
1496                 p+=j;
1497                 }
1498         /* If p == q, no ciphers; caller indicates an error.
1499          * Otherwise, add applicable SCSVs. */
1500         if (p != q)
1501                 {
1502                 if (empty_reneg_info_scsv)
1503                         {
1504                         static SSL_CIPHER scsv =
1505                                 {
1506                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1507                                 };
1508                         j = put_cb(&scsv,p);
1509                         p+=j;
1510 #ifdef OPENSSL_RI_DEBUG
1511                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1512 #endif
1513                         }
1514                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1515                         {
1516                         static SSL_CIPHER scsv =
1517                                 {
1518                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1519                                 };
1520                         j = put_cb(&scsv,p);
1521                         p+=j;
1522                         }
1523                 }
1524
1525         return(p-q);
1526         }
1527
1528 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1529                                                STACK_OF(SSL_CIPHER) **skp)
1530         {
1531         const SSL_CIPHER *c;
1532         STACK_OF(SSL_CIPHER) *sk;
1533         int i,n;
1534
1535         if (s->s3)
1536                 s->s3->send_connection_binding = 0;
1537
1538         n=ssl_put_cipher_by_char(s,NULL,NULL);
1539         if (n == 0 || (num%n) != 0)
1540                 {
1541                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1542                 return(NULL);
1543                 }
1544         if ((skp == NULL) || (*skp == NULL))
1545                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1546         else
1547                 {
1548                 sk= *skp;
1549                 sk_SSL_CIPHER_zero(sk);
1550                 }
1551
1552         if (s->cert->ciphers_raw)
1553                 OPENSSL_free(s->cert->ciphers_raw);
1554         s->cert->ciphers_raw = BUF_memdup(p, num);
1555         if (s->cert->ciphers_raw == NULL)
1556                 {
1557                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1558                 goto err;
1559                 }
1560         s->cert->ciphers_rawlen = (size_t)num;
1561
1562         for (i=0; i<num; i+=n)
1563                 {
1564                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1565                 if (s->s3 && (n != 3 || !p[0]) &&
1566                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1567                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1568                         {
1569                         /* SCSV fatal if renegotiating */
1570                         if (s->renegotiate)
1571                                 {
1572                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1573                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1574                                 goto err;
1575                                 }
1576                         s->s3->send_connection_binding = 1;
1577                         p += n;
1578 #ifdef OPENSSL_RI_DEBUG
1579                         fprintf(stderr, "SCSV received by server\n");
1580 #endif
1581                         continue;
1582                         }
1583
1584                 /* Check for TLS_FALLBACK_SCSV */
1585                 if ((n != 3 || !p[0]) &&
1586                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1587                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1588                         {
1589                         /* The SCSV indicates that the client previously tried a higher version.
1590                          * Fail if the current version is an unexpected downgrade. */
1591                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1592                                 {
1593                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1594                                 if (s->s3)
1595                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1596                                 goto err;
1597                                 }
1598                         p += n;
1599                         continue;
1600                         }
1601
1602                 c=ssl_get_cipher_by_char(s,p);
1603                 p+=n;
1604                 if (c != NULL)
1605                         {
1606                         if (!sk_SSL_CIPHER_push(sk,c))
1607                                 {
1608                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1609                                 goto err;
1610                                 }
1611                         }
1612                 }
1613
1614         if (skp != NULL)
1615                 *skp=sk;
1616         return(sk);
1617 err:
1618         if ((skp == NULL) || (*skp == NULL))
1619                 sk_SSL_CIPHER_free(sk);
1620         return(NULL);
1621         }
1622
1623
1624 #ifndef OPENSSL_NO_TLSEXT
1625 /** return a servername extension value if provided in Client Hello, or NULL.
1626  * So far, only host_name types are defined (RFC 3546).
1627  */
1628
1629 const char *SSL_get_servername(const SSL *s, const int type)
1630         {
1631         if (type != TLSEXT_NAMETYPE_host_name)
1632                 return NULL;
1633
1634         return s->session && !s->tlsext_hostname ?
1635                 s->session->tlsext_hostname :
1636                 s->tlsext_hostname;
1637         }
1638
1639 int SSL_get_servername_type(const SSL *s)
1640         {
1641         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1642                 return TLSEXT_NAMETYPE_host_name;
1643         return -1;
1644         }
1645
1646 /* SSL_select_next_proto implements the standard protocol selection. It is
1647  * expected that this function is called from the callback set by
1648  * SSL_CTX_set_next_proto_select_cb.
1649  *
1650  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1651  * strings. The length byte itself is not included in the length. A byte
1652  * string of length 0 is invalid. No byte string may be truncated.
1653  *
1654  * The current, but experimental algorithm for selecting the protocol is:
1655  *
1656  * 1) If the server doesn't support NPN then this is indicated to the
1657  * callback. In this case, the client application has to abort the connection
1658  * or have a default application level protocol.
1659  *
1660  * 2) If the server supports NPN, but advertises an empty list then the
1661  * client selects the first protcol in its list, but indicates via the
1662  * API that this fallback case was enacted.
1663  *
1664  * 3) Otherwise, the client finds the first protocol in the server's list
1665  * that it supports and selects this protocol. This is because it's
1666  * assumed that the server has better information about which protocol
1667  * a client should use.
1668  *
1669  * 4) If the client doesn't support any of the server's advertised
1670  * protocols, then this is treated the same as case 2.
1671  *
1672  * It returns either
1673  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1674  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1675  */
1676 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)
1677         {
1678         unsigned int i, j;
1679         const unsigned char *result;
1680         int status = OPENSSL_NPN_UNSUPPORTED;
1681
1682         /* For each protocol in server preference order, see if we support it. */
1683         for (i = 0; i < server_len; )
1684                 {
1685                 for (j = 0; j < client_len; )
1686                         {
1687                         if (server[i] == client[j] &&
1688                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1689                                 {
1690                                 /* We found a match */
1691                                 result = &server[i];
1692                                 status = OPENSSL_NPN_NEGOTIATED;
1693                                 goto found;
1694                                 }
1695                         j += client[j];
1696                         j++;
1697                         }
1698                 i += server[i];
1699                 i++;
1700                 }
1701
1702         /* There's no overlap between our protocols and the server's list. */
1703         result = client;
1704         status = OPENSSL_NPN_NO_OVERLAP;
1705
1706         found:
1707         *out = (unsigned char *) result + 1;
1708         *outlen = result[0];
1709         return status;
1710         }
1711
1712 # ifndef OPENSSL_NO_NEXTPROTONEG
1713 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1714  * requested protocol for this connection and returns 0. If the client didn't
1715  * request any protocol, then *data is set to NULL.
1716  *
1717  * Note that the client can request any protocol it chooses. The value returned
1718  * from this function need not be a member of the list of supported protocols
1719  * provided by the callback.
1720  */
1721 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1722         {
1723         *data = s->next_proto_negotiated;
1724         if (!*data) {
1725                 *len = 0;
1726         } else {
1727                 *len = s->next_proto_negotiated_len;
1728         }
1729 }
1730
1731 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1732  * TLS server needs a list of supported protocols for Next Protocol
1733  * Negotiation. The returned list must be in wire format.  The list is returned
1734  * by setting |out| to point to it and |outlen| to its length. This memory will
1735  * not be modified, but one should assume that the SSL* keeps a reference to
1736  * it.
1737  *
1738  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1739  * such extension will be included in the ServerHello. */
1740 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)
1741         {
1742         ctx->next_protos_advertised_cb = cb;
1743         ctx->next_protos_advertised_cb_arg = arg;
1744         }
1745
1746 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1747  * client needs to select a protocol from the server's provided list. |out|
1748  * must be set to point to the selected protocol (which may be within |in|).
1749  * The length of the protocol name must be written into |outlen|. The server's
1750  * advertised protocols are provided in |in| and |inlen|. The callback can
1751  * assume that |in| is syntactically valid.
1752  *
1753  * The client must select a protocol. It is fatal to the connection if this
1754  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1755  */
1756 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)
1757         {
1758         ctx->next_proto_select_cb = cb;
1759         ctx->next_proto_select_cb_arg = arg;
1760         }
1761 # endif
1762
1763 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| 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_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
1769                             unsigned protos_len)
1770         {
1771         if (ctx->alpn_client_proto_list)
1772                 OPENSSL_free(ctx->alpn_client_proto_list);
1773
1774         ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1775         if (!ctx->alpn_client_proto_list)
1776                 return 1;
1777         memcpy(ctx->alpn_client_proto_list, protos, protos_len);
1778         ctx->alpn_client_proto_list_len = protos_len;
1779
1780         return 0;
1781         }
1782
1783 /* SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
1784  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1785  * length-prefixed strings).
1786  *
1787  * Returns 0 on success. */
1788 int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
1789                         unsigned protos_len)
1790         {
1791         if (ssl->alpn_client_proto_list)
1792                 OPENSSL_free(ssl->alpn_client_proto_list);
1793
1794         ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1795         if (!ssl->alpn_client_proto_list)
1796                 return 1;
1797         memcpy(ssl->alpn_client_proto_list, protos, protos_len);
1798         ssl->alpn_client_proto_list_len = protos_len;
1799
1800         return 0;
1801         }
1802
1803 /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
1804  * during ClientHello processing in order to select an ALPN protocol from the
1805  * client's list of offered protocols. */
1806 void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
1807                                 int (*cb) (SSL *ssl,
1808                                            const unsigned char **out,
1809                                            unsigned char *outlen,
1810                                            const unsigned char *in,
1811                                            unsigned int inlen,
1812                                            void *arg),
1813                                 void *arg)
1814         {
1815         ctx->alpn_select_cb = cb;
1816         ctx->alpn_select_cb_arg = arg;
1817         }
1818
1819 /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
1820  * On return it sets |*data| to point to |*len| bytes of protocol name (not
1821  * including the leading length-prefix byte). If the server didn't respond with
1822  * a negotiated protocol then |*len| will be zero. */
1823 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1824                             unsigned *len)
1825         {
1826         *data = NULL;
1827         if (ssl->s3)
1828                 *data = ssl->s3->alpn_selected;
1829         if (*data == NULL)
1830                 *len = 0;
1831         else
1832                 *len = ssl->s3->alpn_selected_len;
1833         }
1834
1835 #endif /* !OPENSSL_NO_TLSEXT */
1836
1837 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1838         const char *label, size_t llen, const unsigned char *p, size_t plen,
1839         int use_context)
1840         {
1841         if (s->version < TLS1_VERSION)
1842                 return -1;
1843
1844         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1845                                                            llen, p, plen,
1846                                                            use_context);
1847         }
1848
1849 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1850         {
1851         unsigned long l;
1852
1853         l=(unsigned long)
1854                 ((unsigned int) a->session_id[0]     )|
1855                 ((unsigned int) a->session_id[1]<< 8L)|
1856                 ((unsigned long)a->session_id[2]<<16L)|
1857                 ((unsigned long)a->session_id[3]<<24L);
1858         return(l);
1859         }
1860
1861 /* NB: If this function (or indeed the hash function which uses a sort of
1862  * coarser function than this one) is changed, ensure
1863  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1864  * able to construct an SSL_SESSION that will collide with any existing session
1865  * with a matching session ID. */
1866 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1867         {
1868         if (a->ssl_version != b->ssl_version)
1869                 return(1);
1870         if (a->session_id_length != b->session_id_length)
1871                 return(1);
1872         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1873         }
1874
1875 /* These wrapper functions should remain rather than redeclaring
1876  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1877  * variable. The reason is that the functions aren't static, they're exposed via
1878  * ssl.h. */
1879 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1880 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1881
1882 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1883         {
1884         SSL_CTX *ret=NULL;
1885
1886         if (meth == NULL)
1887                 {
1888                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1889                 return(NULL);
1890                 }
1891
1892         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1893                 {
1894                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1895                 return NULL;
1896                 }
1897
1898         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1899                 {
1900                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1901                 goto err;
1902                 }
1903         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1904         if (ret == NULL)
1905                 goto err;
1906
1907         memset(ret,0,sizeof(SSL_CTX));
1908
1909         ret->method=meth;
1910
1911         ret->cert_store=NULL;
1912         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1913         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1914         ret->session_cache_head=NULL;
1915         ret->session_cache_tail=NULL;
1916
1917         /* We take the system default */
1918         ret->session_timeout=meth->get_timeout();
1919
1920         ret->new_session_cb=0;
1921         ret->remove_session_cb=0;
1922         ret->get_session_cb=0;
1923         ret->generate_session_id=0;
1924
1925         memset((char *)&ret->stats,0,sizeof(ret->stats));
1926
1927         ret->references=1;
1928         ret->quiet_shutdown=0;
1929
1930 /*      ret->cipher=NULL;*/
1931 /*      ret->s2->challenge=NULL;
1932         ret->master_key=NULL;
1933         ret->s2->conn_id=NULL; */
1934
1935         ret->info_callback=NULL;
1936
1937         ret->app_verify_callback=0;
1938         ret->app_verify_arg=NULL;
1939
1940         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1941         ret->read_ahead=0;
1942         ret->msg_callback=0;
1943         ret->msg_callback_arg=NULL;
1944         ret->verify_mode=SSL_VERIFY_NONE;
1945 #if 0
1946         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1947 #endif
1948         ret->sid_ctx_length=0;
1949         ret->default_verify_callback=NULL;
1950         if ((ret->cert=ssl_cert_new()) == NULL)
1951                 goto err;
1952
1953         ret->default_passwd_callback=0;
1954         ret->default_passwd_callback_userdata=NULL;
1955         ret->client_cert_cb=0;
1956         ret->app_gen_cookie_cb=0;
1957         ret->app_verify_cookie_cb=0;
1958
1959         ret->sessions=lh_SSL_SESSION_new();
1960         if (ret->sessions == NULL) goto err;
1961         ret->cert_store=X509_STORE_new();
1962         if (ret->cert_store == NULL) goto err;
1963
1964         ssl_create_cipher_list(ret->method,
1965                 &ret->cipher_list,&ret->cipher_list_by_id,
1966                 SSL_DEFAULT_CIPHER_LIST, ret->cert);
1967         if (ret->cipher_list == NULL
1968             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1969                 {
1970                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1971                 goto err2;
1972                 }
1973
1974         ret->param = X509_VERIFY_PARAM_new();
1975         if (!ret->param)
1976                 goto err;
1977
1978         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1979                 {
1980                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1981                 goto err2;
1982                 }
1983         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1984                 {
1985                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1986                 goto err2;
1987                 }
1988
1989         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1990                 goto err;
1991
1992         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1993
1994         ret->extra_certs=NULL;
1995         /* No compression for DTLS */
1996         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
1997                 ret->comp_methods=SSL_COMP_get_compression_methods();
1998
1999         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2000
2001 #ifndef OPENSSL_NO_TLSEXT
2002         ret->tlsext_servername_callback = 0;
2003         ret->tlsext_servername_arg = NULL;
2004         /* Setup RFC4507 ticket keys */
2005         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
2006                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
2007                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
2008                 ret->options |= SSL_OP_NO_TICKET;
2009
2010         ret->tlsext_status_cb = 0;
2011         ret->tlsext_status_arg = NULL;
2012
2013 # ifndef OPENSSL_NO_NEXTPROTONEG
2014         ret->next_protos_advertised_cb = 0;
2015         ret->next_proto_select_cb = 0;
2016 # endif
2017 #endif
2018 #ifndef OPENSSL_NO_PSK
2019         ret->psk_identity_hint=NULL;
2020         ret->psk_client_callback=NULL;
2021         ret->psk_server_callback=NULL;
2022 #endif
2023 #ifndef OPENSSL_NO_SRP
2024         SSL_CTX_SRP_CTX_init(ret);
2025 #endif
2026 #ifndef OPENSSL_NO_BUF_FREELISTS
2027         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
2028         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2029         if (!ret->rbuf_freelist)
2030                 goto err;
2031         ret->rbuf_freelist->chunklen = 0;
2032         ret->rbuf_freelist->len = 0;
2033         ret->rbuf_freelist->head = NULL;
2034         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2035         if (!ret->wbuf_freelist)
2036                 {
2037                 OPENSSL_free(ret->rbuf_freelist);
2038                 goto err;
2039                 }
2040         ret->wbuf_freelist->chunklen = 0;
2041         ret->wbuf_freelist->len = 0;
2042         ret->wbuf_freelist->head = NULL;
2043 #endif
2044 #ifndef OPENSSL_NO_ENGINE
2045         ret->client_cert_engine = NULL;
2046 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2047 #define eng_strx(x)     #x
2048 #define eng_str(x)      eng_strx(x)
2049         /* Use specific client engine automatically... ignore errors */
2050         {
2051         ENGINE *eng;
2052         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2053         if (!eng)
2054                 {
2055                 ERR_clear_error();
2056                 ENGINE_load_builtin_engines();
2057                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2058                 }
2059         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2060                 ERR_clear_error();
2061         }
2062 #endif
2063 #endif
2064         /* Default is to connect to non-RI servers. When RI is more widely
2065          * deployed might change this.
2066          */
2067         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2068
2069         return(ret);
2070 err:
2071         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2072 err2:
2073         if (ret != NULL) SSL_CTX_free(ret);
2074         return(NULL);
2075         }
2076
2077 #if 0
2078 static void SSL_COMP_free(SSL_COMP *comp)
2079     { OPENSSL_free(comp); }
2080 #endif
2081
2082 #ifndef OPENSSL_NO_BUF_FREELISTS
2083 static void
2084 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2085         {
2086         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2087         for (ent = list->head; ent; ent = next)
2088                 {
2089                 next = ent->next;
2090                 OPENSSL_free(ent);
2091                 }
2092         OPENSSL_free(list);
2093         }
2094 #endif
2095
2096 void SSL_CTX_free(SSL_CTX *a)
2097         {
2098         int i;
2099
2100         if (a == NULL) return;
2101
2102         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2103 #ifdef REF_PRINT
2104         REF_PRINT("SSL_CTX",a);
2105 #endif
2106         if (i > 0) return;
2107 #ifdef REF_CHECK
2108         if (i < 0)
2109                 {
2110                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2111                 abort(); /* ok */
2112                 }
2113 #endif
2114
2115         if (a->param)
2116                 X509_VERIFY_PARAM_free(a->param);
2117
2118         /*
2119          * Free internal session cache. However: the remove_cb() may reference
2120          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2121          * after the sessions were flushed.
2122          * As the ex_data handling routines might also touch the session cache,
2123          * the most secure solution seems to be: empty (flush) the cache, then
2124          * free ex_data, then finally free the cache.
2125          * (See ticket [openssl.org #212].)
2126          */
2127         if (a->sessions != NULL)
2128                 SSL_CTX_flush_sessions(a,0);
2129
2130         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2131
2132         if (a->sessions != NULL)
2133                 lh_SSL_SESSION_free(a->sessions);
2134
2135         if (a->cert_store != NULL)
2136                 X509_STORE_free(a->cert_store);
2137         if (a->cipher_list != NULL)
2138                 sk_SSL_CIPHER_free(a->cipher_list);
2139         if (a->cipher_list_by_id != NULL)
2140                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2141         if (a->cert != NULL)
2142                 ssl_cert_free(a->cert);
2143         if (a->client_CA != NULL)
2144                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2145         if (a->extra_certs != NULL)
2146                 sk_X509_pop_free(a->extra_certs,X509_free);
2147 #if 0 /* This should never be done, since it removes a global database */
2148         if (a->comp_methods != NULL)
2149                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2150 #else
2151         a->comp_methods = NULL;
2152 #endif
2153
2154         if (a->srtp_profiles)
2155                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2156
2157 #ifndef OPENSSL_NO_PSK
2158         if (a->psk_identity_hint)
2159                 OPENSSL_free(a->psk_identity_hint);
2160 #endif
2161 #ifndef OPENSSL_NO_SRP
2162         SSL_CTX_SRP_CTX_free(a);
2163 #endif
2164 #ifndef OPENSSL_NO_ENGINE
2165         if (a->client_cert_engine)
2166                 ENGINE_finish(a->client_cert_engine);
2167 #endif
2168
2169 #ifndef OPENSSL_NO_BUF_FREELISTS
2170         if (a->wbuf_freelist)
2171                 ssl_buf_freelist_free(a->wbuf_freelist);
2172         if (a->rbuf_freelist)
2173                 ssl_buf_freelist_free(a->rbuf_freelist);
2174 #endif
2175 #ifndef OPENSSL_NO_TLSEXT
2176 # ifndef OPENSSL_NO_EC
2177         if (a->tlsext_ecpointformatlist)
2178                 OPENSSL_free(a->tlsext_ecpointformatlist);
2179         if (a->tlsext_ellipticcurvelist)
2180                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2181 # endif /* OPENSSL_NO_EC */
2182         if (a->alpn_client_proto_list != NULL)
2183                 OPENSSL_free(a->alpn_client_proto_list);
2184 #endif
2185
2186         OPENSSL_free(a);
2187         }
2188
2189 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2190         {
2191         ctx->default_passwd_callback=cb;
2192         }
2193
2194 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2195         {
2196         ctx->default_passwd_callback_userdata=u;
2197         }
2198
2199 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2200         {
2201         ctx->app_verify_callback=cb;
2202         ctx->app_verify_arg=arg;
2203         }
2204
2205 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2206         {
2207         ctx->verify_mode=mode;
2208         ctx->default_verify_callback=cb;
2209         }
2210
2211 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2212         {
2213         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2214         }
2215
2216 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2217         {
2218         ssl_cert_set_cert_cb(c->cert, cb, arg);
2219         }
2220
2221 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2222         {
2223         ssl_cert_set_cert_cb(s->cert, cb, arg);
2224         }
2225
2226 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2227         {
2228         CERT_PKEY *cpk;
2229         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2230         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2231         int rsa_tmp_export,dh_tmp_export,kl;
2232         unsigned long mask_k,mask_a,emask_k,emask_a;
2233 #ifndef OPENSSL_NO_ECDSA
2234         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2235 #endif
2236 #ifndef OPENSSL_NO_ECDH
2237         int have_ecdh_tmp, ecdh_ok;
2238 #endif
2239 #ifndef OPENSSL_NO_EC
2240         X509 *x = NULL;
2241         EVP_PKEY *ecc_pkey = NULL;
2242         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2243 #endif
2244         if (c == NULL) return;
2245
2246         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2247
2248 #ifndef OPENSSL_NO_RSA
2249         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2250         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2251                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2252 #else
2253         rsa_tmp=rsa_tmp_export=0;
2254 #endif
2255 #ifndef OPENSSL_NO_DH
2256         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
2257         dh_tmp_export= !c->dh_tmp_auto && (c->dh_tmp_cb != NULL ||
2258                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2259 #else
2260         dh_tmp=dh_tmp_export=0;
2261 #endif
2262
2263 #ifndef OPENSSL_NO_ECDH
2264         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2265 #endif
2266         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2267         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2268         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2269         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2270         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2271         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2272         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2273         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2274         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2275         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2276         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2277 /* FIX THIS EAY EAY EAY */
2278         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2279         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2280         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2281 #ifndef OPENSSL_NO_EC
2282         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2283 #endif
2284         mask_k=0;
2285         mask_a=0;
2286         emask_k=0;
2287         emask_a=0;
2288
2289
2290
2291 #ifdef CIPHER_DEBUG
2292         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2293                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2294                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2295 #endif
2296
2297         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2298         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2299                 mask_k |= SSL_kGOST;
2300                 mask_a |= SSL_aGOST01;
2301         }
2302         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2303         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2304                 mask_k |= SSL_kGOST;
2305                 mask_a |= SSL_aGOST94;
2306         }
2307
2308         if (rsa_enc || (rsa_tmp && rsa_sign))
2309                 mask_k|=SSL_kRSA;
2310         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2311                 emask_k|=SSL_kRSA;
2312
2313 #if 0
2314         /* The match needs to be both kDHE and aRSA or aDSA, so don't worry */
2315         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2316                 (rsa_enc || rsa_sign || dsa_sign))
2317                 mask_k|=SSL_kDHE;
2318         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2319                 (rsa_enc || rsa_sign || dsa_sign))
2320                 emask_k|=SSL_kDHE;
2321 #endif
2322
2323         if (dh_tmp_export)
2324                 emask_k|=SSL_kDHE;
2325
2326         if (dh_tmp)
2327                 mask_k|=SSL_kDHE;
2328
2329         if (dh_rsa) mask_k|=SSL_kDHr;
2330         if (dh_rsa_export) emask_k|=SSL_kDHr;
2331
2332         if (dh_dsa) mask_k|=SSL_kDHd;
2333         if (dh_dsa_export) emask_k|=SSL_kDHd;
2334
2335         if (emask_k & (SSL_kDHr|SSL_kDHd))
2336                 mask_a |= SSL_aDH;
2337
2338         if (rsa_enc || rsa_sign)
2339                 {
2340                 mask_a|=SSL_aRSA;
2341                 emask_a|=SSL_aRSA;
2342                 }
2343
2344         if (dsa_sign)
2345                 {
2346                 mask_a|=SSL_aDSS;
2347                 emask_a|=SSL_aDSS;
2348                 }
2349
2350         mask_a|=SSL_aNULL;
2351         emask_a|=SSL_aNULL;
2352
2353 #ifndef OPENSSL_NO_KRB5
2354         mask_k|=SSL_kKRB5;
2355         mask_a|=SSL_aKRB5;
2356         emask_k|=SSL_kKRB5;
2357         emask_a|=SSL_aKRB5;
2358 #endif
2359
2360         /* An ECC certificate may be usable for ECDH and/or
2361          * ECDSA cipher suites depending on the key usage extension.
2362          */
2363 #ifndef OPENSSL_NO_EC
2364         if (have_ecc_cert)
2365                 {
2366                 cpk = &c->pkeys[SSL_PKEY_ECC];
2367                 x = cpk->x509;
2368                 /* This call populates extension flags (ex_flags) */
2369                 X509_check_purpose(x, -1, 0);
2370                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2371                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2372                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2373                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2374                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2375                         ecdsa_ok = 0;
2376                 ecc_pkey = X509_get_pubkey(x);
2377                 ecc_pkey_size = (ecc_pkey != NULL) ?
2378                     EVP_PKEY_bits(ecc_pkey) : 0;
2379                 EVP_PKEY_free(ecc_pkey);
2380                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2381                         {
2382                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2383                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2384                         }
2385 #ifndef OPENSSL_NO_ECDH
2386                 if (ecdh_ok)
2387                         {
2388
2389                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2390                                 {
2391                                 mask_k|=SSL_kECDHr;
2392                                 mask_a|=SSL_aECDH;
2393                                 if (ecc_pkey_size <= 163)
2394                                         {
2395                                         emask_k|=SSL_kECDHr;
2396                                         emask_a|=SSL_aECDH;
2397                                         }
2398                                 }
2399
2400                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2401                                 {
2402                                 mask_k|=SSL_kECDHe;
2403                                 mask_a|=SSL_aECDH;
2404                                 if (ecc_pkey_size <= 163)
2405                                         {
2406                                         emask_k|=SSL_kECDHe;
2407                                         emask_a|=SSL_aECDH;
2408                                         }
2409                                 }
2410                         }
2411 #endif
2412 #ifndef OPENSSL_NO_ECDSA
2413                 if (ecdsa_ok)
2414                         {
2415                         mask_a|=SSL_aECDSA;
2416                         emask_a|=SSL_aECDSA;
2417                         }
2418 #endif
2419                 }
2420 #endif
2421
2422 #ifndef OPENSSL_NO_ECDH
2423         if (have_ecdh_tmp)
2424                 {
2425                 mask_k|=SSL_kECDHE;
2426                 emask_k|=SSL_kECDHE;
2427                 }
2428 #endif
2429
2430 #ifndef OPENSSL_NO_PSK
2431         mask_k |= SSL_kPSK;
2432         mask_a |= SSL_aPSK;
2433         emask_k |= SSL_kPSK;
2434         emask_a |= SSL_aPSK;
2435 #endif
2436
2437         c->mask_k=mask_k;
2438         c->mask_a=mask_a;
2439         c->export_mask_k=emask_k;
2440         c->export_mask_a=emask_a;
2441         c->valid=1;
2442         }
2443
2444 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2445 #define ku_reject(x, usage) \
2446         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2447
2448 #ifndef OPENSSL_NO_EC
2449
2450 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2451         {
2452         unsigned long alg_k, alg_a;
2453         EVP_PKEY *pkey = NULL;
2454         int keysize = 0;
2455         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2456         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2457
2458         alg_k = cs->algorithm_mkey;
2459         alg_a = cs->algorithm_auth;
2460
2461         if (SSL_C_IS_EXPORT(cs))
2462                 {
2463                 /* ECDH key length in export ciphers must be <= 163 bits */
2464                 pkey = X509_get_pubkey(x);
2465                 if (pkey == NULL) return 0;
2466                 keysize = EVP_PKEY_bits(pkey);
2467                 EVP_PKEY_free(pkey);
2468                 if (keysize > 163) return 0;
2469                 }
2470
2471         /* This call populates the ex_flags field correctly */
2472         X509_check_purpose(x, -1, 0);
2473         if ((x->sig_alg) && (x->sig_alg->algorithm))
2474                 {
2475                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2476                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2477                 }
2478         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2479                 {
2480                 /* key usage, if present, must allow key agreement */
2481                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2482                         {
2483                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2484                         return 0;
2485                         }
2486                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2487                         {
2488                         /* signature alg must be ECDSA */
2489                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2490                                 {
2491                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2492                                 return 0;
2493                                 }
2494                         }
2495                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2496                         {
2497                         /* signature alg must be RSA */
2498
2499                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2500                                 {
2501                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2502                                 return 0;
2503                                 }
2504                         }
2505                 }
2506         if (alg_a & SSL_aECDSA)
2507                 {
2508                 /* key usage, if present, must allow signing */
2509                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2510                         {
2511                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2512                         return 0;
2513                         }
2514                 }
2515
2516         return 1;  /* all checks are ok */
2517         }
2518
2519 #endif
2520
2521 static int ssl_get_server_cert_index(const SSL *s)
2522         {
2523         int idx;
2524         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2525         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2526                 idx = SSL_PKEY_RSA_SIGN;
2527         if (idx == -1)
2528                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2529         return idx;
2530         }
2531
2532 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2533         {
2534         CERT *c;
2535         int i;
2536
2537         c = s->cert;
2538         if (!s->s3 || !s->s3->tmp.new_cipher)
2539                 return NULL;
2540         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2541
2542 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2543         /* Broken protocol test: return last used certificate: which may
2544          * mismatch the one expected.
2545          */
2546         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2547                 return c->key;
2548 #endif
2549
2550         i = ssl_get_server_cert_index(s);
2551
2552         /* This may or may not be an error. */
2553         if (i < 0)
2554                 return NULL;
2555
2556         /* May be NULL. */
2557         return &c->pkeys[i];
2558         }
2559
2560 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2561         {
2562         unsigned long alg_a;
2563         CERT *c;
2564         int idx = -1;
2565
2566         alg_a = cipher->algorithm_auth;
2567         c=s->cert;
2568
2569 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2570         /* Broken protocol test: use last key: which may
2571          * mismatch the one expected.
2572          */
2573         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2574                 idx = c->key - c->pkeys;
2575         else
2576 #endif
2577
2578         if ((alg_a & SSL_aDSS) &&
2579                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2580                 idx = SSL_PKEY_DSA_SIGN;
2581         else if (alg_a & SSL_aRSA)
2582                 {
2583                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2584                         idx = SSL_PKEY_RSA_SIGN;
2585                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2586                         idx = SSL_PKEY_RSA_ENC;
2587                 }
2588         else if ((alg_a & SSL_aECDSA) &&
2589                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2590                 idx = SSL_PKEY_ECC;
2591         if (idx == -1)
2592                 {
2593                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2594                 return(NULL);
2595                 }
2596         if (pmd)
2597                 *pmd = c->pkeys[idx].digest;
2598         return c->pkeys[idx].privatekey;
2599         }
2600
2601 #ifndef OPENSSL_NO_TLSEXT
2602 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2603                                    size_t *serverinfo_length)
2604         {
2605         CERT *c = NULL;
2606         int i = 0;
2607         *serverinfo_length = 0;
2608
2609         c = s->cert;
2610         i = ssl_get_server_cert_index(s);
2611
2612         if (i == -1)
2613                 return 0;
2614         if (c->pkeys[i].serverinfo == NULL)
2615                 return 0;
2616
2617         *serverinfo = c->pkeys[i].serverinfo;
2618         *serverinfo_length = c->pkeys[i].serverinfo_length;
2619         return 1;
2620         }
2621 #endif
2622
2623 void ssl_update_cache(SSL *s,int mode)
2624         {
2625         int i;
2626
2627         /* If the session_id_length is 0, we are not supposed to cache it,
2628          * and it would be rather hard to do anyway :-) */
2629         if (s->session->session_id_length == 0) return;
2630
2631         i=s->session_ctx->session_cache_mode;
2632         if ((i & mode) && (!s->hit)
2633                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2634                     || SSL_CTX_add_session(s->session_ctx,s->session))
2635                 && (s->session_ctx->new_session_cb != NULL))
2636                 {
2637                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2638                 if (!s->session_ctx->new_session_cb(s,s->session))
2639                         SSL_SESSION_free(s->session);
2640                 }
2641
2642         /* auto flush every 255 connections */
2643         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2644                 ((i & mode) == mode))
2645                 {
2646                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2647                         ?s->session_ctx->stats.sess_connect_good
2648                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2649                         {
2650                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2651                         }
2652                 }
2653         }
2654
2655 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2656         {
2657         return ctx->method;
2658         }
2659
2660 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2661         {
2662         return(s->method);
2663         }
2664
2665 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2666         {
2667         int conn= -1;
2668         int ret=1;
2669
2670         if (s->method != meth)
2671                 {
2672                 if (s->handshake_func != NULL)
2673                         conn=(s->handshake_func == s->method->ssl_connect);
2674
2675                 if (s->method->version == meth->version)
2676                         s->method=meth;
2677                 else
2678                         {
2679                         s->method->ssl_free(s);
2680                         s->method=meth;
2681                         ret=s->method->ssl_new(s);
2682                         }
2683
2684                 if (conn == 1)
2685                         s->handshake_func=meth->ssl_connect;
2686                 else if (conn == 0)
2687                         s->handshake_func=meth->ssl_accept;
2688                 }
2689         return(ret);
2690         }
2691
2692 int SSL_get_error(const SSL *s,int i)
2693         {
2694         int reason;
2695         unsigned long l;
2696         BIO *bio;
2697
2698         if (i > 0) return(SSL_ERROR_NONE);
2699
2700         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2701          * etc, where we do encode the error */
2702         if ((l=ERR_peek_error()) != 0)
2703                 {
2704                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2705                         return(SSL_ERROR_SYSCALL);
2706                 else
2707                         return(SSL_ERROR_SSL);
2708                 }
2709
2710         if ((i < 0) && SSL_want_read(s))
2711                 {
2712                 bio=SSL_get_rbio(s);
2713                 if (BIO_should_read(bio))
2714                         return(SSL_ERROR_WANT_READ);
2715                 else if (BIO_should_write(bio))
2716                         /* This one doesn't make too much sense ... We never try
2717                          * to write to the rbio, and an application program where
2718                          * rbio and wbio are separate couldn't even know what it
2719                          * should wait for.
2720                          * However if we ever set s->rwstate incorrectly
2721                          * (so that we have SSL_want_read(s) instead of
2722                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2723                          * this test works around that bug; so it might be safer
2724                          * to keep it. */
2725                         return(SSL_ERROR_WANT_WRITE);
2726                 else if (BIO_should_io_special(bio))
2727                         {
2728                         reason=BIO_get_retry_reason(bio);
2729                         if (reason == BIO_RR_CONNECT)
2730                                 return(SSL_ERROR_WANT_CONNECT);
2731                         else if (reason == BIO_RR_ACCEPT)
2732                                 return(SSL_ERROR_WANT_ACCEPT);
2733                         else
2734                                 return(SSL_ERROR_SYSCALL); /* unknown */
2735                         }
2736                 }
2737
2738         if ((i < 0) && SSL_want_write(s))
2739                 {
2740                 bio=SSL_get_wbio(s);
2741                 if (BIO_should_write(bio))
2742                         return(SSL_ERROR_WANT_WRITE);
2743                 else if (BIO_should_read(bio))
2744                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2745                         return(SSL_ERROR_WANT_READ);
2746                 else if (BIO_should_io_special(bio))
2747                         {
2748                         reason=BIO_get_retry_reason(bio);
2749                         if (reason == BIO_RR_CONNECT)
2750                                 return(SSL_ERROR_WANT_CONNECT);
2751                         else if (reason == BIO_RR_ACCEPT)
2752                                 return(SSL_ERROR_WANT_ACCEPT);
2753                         else
2754                                 return(SSL_ERROR_SYSCALL);
2755                         }
2756                 }
2757         if ((i < 0) && SSL_want_x509_lookup(s))
2758                 {
2759                 return(SSL_ERROR_WANT_X509_LOOKUP);
2760                 }
2761
2762         if (i == 0)
2763                 {
2764                 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2765                         (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2766                         return(SSL_ERROR_ZERO_RETURN);
2767                 }
2768         return(SSL_ERROR_SYSCALL);
2769         }
2770
2771 int SSL_do_handshake(SSL *s)
2772         {
2773         int ret=1;
2774
2775         if (s->handshake_func == NULL)
2776                 {
2777                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2778                 return(-1);
2779                 }
2780
2781         s->method->ssl_renegotiate_check(s);
2782
2783         if (SSL_in_init(s) || SSL_in_before(s))
2784                 {
2785                 ret=s->handshake_func(s);
2786                 }
2787         return(ret);
2788         }
2789
2790 /* For the next 2 functions, SSL_clear() sets shutdown and so
2791  * one of these calls will reset it */
2792 void SSL_set_accept_state(SSL *s)
2793         {
2794         s->server=1;
2795         s->shutdown=0;
2796         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2797         s->handshake_func=s->method->ssl_accept;
2798         /* clear the current cipher */
2799         ssl_clear_cipher_ctx(s);
2800         ssl_clear_hash_ctx(&s->read_hash);
2801         ssl_clear_hash_ctx(&s->write_hash);
2802         }
2803
2804 void SSL_set_connect_state(SSL *s)
2805         {
2806         s->server=0;
2807         s->shutdown=0;
2808         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2809         s->handshake_func=s->method->ssl_connect;
2810         /* clear the current cipher */
2811         ssl_clear_cipher_ctx(s);
2812         ssl_clear_hash_ctx(&s->read_hash);
2813         ssl_clear_hash_ctx(&s->write_hash);
2814         }
2815
2816 int ssl_undefined_function(SSL *s)
2817         {
2818         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2819         return(0);
2820         }
2821
2822 int ssl_undefined_void_function(void)
2823         {
2824         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2825         return(0);
2826         }
2827
2828 int ssl_undefined_const_function(const SSL *s)
2829         {
2830         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2831         return(0);
2832         }
2833
2834 SSL_METHOD *ssl_bad_method(int ver)
2835         {
2836         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2837         return(NULL);
2838         }
2839
2840 const char *SSL_get_version(const SSL *s)
2841         {
2842         if (s->version == TLS1_2_VERSION)
2843                 return("TLSv1.2");
2844         else if (s->version == TLS1_1_VERSION)
2845                 return("TLSv1.1");
2846         else if (s->version == TLS1_VERSION)
2847                 return("TLSv1");
2848         else if (s->version == SSL3_VERSION)
2849                 return("SSLv3");
2850         else
2851                 return("unknown");
2852         }
2853
2854 SSL *SSL_dup(SSL *s)
2855         {
2856         STACK_OF(X509_NAME) *sk;
2857         X509_NAME *xn;
2858         SSL *ret;
2859         int i;
2860
2861         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2862             return(NULL);
2863
2864         ret->version = s->version;
2865         ret->type = s->type;
2866         ret->method = s->method;
2867
2868         if (s->session != NULL)
2869                 {
2870                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2871                 SSL_copy_session_id(ret,s);
2872                 }
2873         else
2874                 {
2875                 /* No session has been established yet, so we have to expect
2876                  * that s->cert or ret->cert will be changed later --
2877                  * they should not both point to the same object,
2878                  * and thus we can't use SSL_copy_session_id. */
2879
2880                 ret->method->ssl_free(ret);
2881                 ret->method = s->method;
2882                 ret->method->ssl_new(ret);
2883
2884                 if (s->cert != NULL)
2885                         {
2886                         if (ret->cert != NULL)
2887                                 {
2888                                 ssl_cert_free(ret->cert);
2889                                 }
2890                         ret->cert = ssl_cert_dup(s->cert);
2891                         if (ret->cert == NULL)
2892                                 goto err;
2893                         }
2894
2895                 SSL_set_session_id_context(ret,
2896                         s->sid_ctx, s->sid_ctx_length);
2897                 }
2898
2899         ret->options=s->options;
2900         ret->mode=s->mode;
2901         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2902         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2903         ret->msg_callback = s->msg_callback;
2904         ret->msg_callback_arg = s->msg_callback_arg;
2905         SSL_set_verify(ret,SSL_get_verify_mode(s),
2906                 SSL_get_verify_callback(s));
2907         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2908         ret->generate_session_id = s->generate_session_id;
2909
2910         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2911
2912         ret->debug=s->debug;
2913
2914         /* copy app data, a little dangerous perhaps */
2915         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2916                 goto err;
2917
2918         /* setup rbio, and wbio */
2919         if (s->rbio != NULL)
2920                 {
2921                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2922                         goto err;
2923                 }
2924         if (s->wbio != NULL)
2925                 {
2926                 if (s->wbio != s->rbio)
2927                         {
2928                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2929                                 goto err;
2930                         }
2931                 else
2932                         ret->wbio=ret->rbio;
2933                 }
2934         ret->rwstate = s->rwstate;
2935         ret->in_handshake = s->in_handshake;
2936         ret->handshake_func = s->handshake_func;
2937         ret->server = s->server;
2938         ret->renegotiate = s->renegotiate;
2939         ret->new_session = s->new_session;
2940         ret->quiet_shutdown = s->quiet_shutdown;
2941         ret->shutdown=s->shutdown;
2942         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2943         ret->rstate=s->rstate;
2944         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2945         ret->hit=s->hit;
2946
2947         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2948
2949         /* dup the cipher_list and cipher_list_by_id stacks */
2950         if (s->cipher_list != NULL)
2951                 {
2952                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2953                         goto err;
2954                 }
2955         if (s->cipher_list_by_id != NULL)
2956                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2957                         == NULL)
2958                         goto err;
2959
2960         /* Dup the client_CA list */
2961         if (s->client_CA != NULL)
2962                 {
2963                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2964                 ret->client_CA=sk;
2965                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2966                         {
2967                         xn=sk_X509_NAME_value(sk,i);
2968                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2969                                 {
2970                                 X509_NAME_free(xn);
2971                                 goto err;
2972                                 }
2973                         }
2974                 }
2975
2976         if (0)
2977                 {
2978 err:
2979                 if (ret != NULL) SSL_free(ret);
2980                 ret=NULL;
2981                 }
2982         return(ret);
2983         }
2984
2985 void ssl_clear_cipher_ctx(SSL *s)
2986         {
2987         if (s->enc_read_ctx != NULL)
2988                 {
2989                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2990                 OPENSSL_free(s->enc_read_ctx);
2991                 s->enc_read_ctx=NULL;
2992                 }
2993         if (s->enc_write_ctx != NULL)
2994                 {
2995                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2996                 OPENSSL_free(s->enc_write_ctx);
2997                 s->enc_write_ctx=NULL;
2998                 }
2999 #ifndef OPENSSL_NO_COMP
3000         if (s->expand != NULL)
3001                 {
3002                 COMP_CTX_free(s->expand);
3003                 s->expand=NULL;
3004                 }
3005         if (s->compress != NULL)
3006                 {
3007                 COMP_CTX_free(s->compress);
3008                 s->compress=NULL;
3009                 }
3010 #endif
3011         }
3012
3013 X509 *SSL_get_certificate(const SSL *s)
3014         {
3015         if (s->cert != NULL)
3016                 return(s->cert->key->x509);
3017         else
3018                 return(NULL);
3019         }
3020
3021 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3022         {
3023         if (s->cert != NULL)
3024                 return(s->cert->key->privatekey);
3025         else
3026                 return(NULL);
3027         }
3028
3029 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3030         {
3031         if (ctx->cert != NULL)
3032                 return ctx->cert->key->x509;
3033         else
3034                 return NULL;
3035         }
3036
3037 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3038         {
3039         if (ctx->cert != NULL)
3040                 return ctx->cert->key->privatekey;
3041         else
3042                 return NULL ;
3043         }
3044
3045 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3046         {
3047         if ((s->session != NULL) && (s->session->cipher != NULL))
3048                 return(s->session->cipher);
3049         return(NULL);
3050         }
3051 #ifdef OPENSSL_NO_COMP
3052 const void *SSL_get_current_compression(SSL *s)
3053         {
3054         return NULL;
3055         }
3056 const void *SSL_get_current_expansion(SSL *s)
3057         {
3058         return NULL;
3059         }
3060 #else
3061
3062 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3063         {
3064         if (s->compress != NULL)
3065                 return(s->compress->meth);
3066         return(NULL);
3067         }
3068
3069 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3070         {
3071         if (s->expand != NULL)
3072                 return(s->expand->meth);
3073         return(NULL);
3074         }
3075 #endif
3076
3077 int ssl_init_wbio_buffer(SSL *s,int push)
3078         {
3079         BIO *bbio;
3080
3081         if (s->bbio == NULL)
3082                 {
3083                 bbio=BIO_new(BIO_f_buffer());
3084                 if (bbio == NULL) return(0);
3085                 s->bbio=bbio;
3086                 }
3087         else
3088                 {
3089                 bbio=s->bbio;
3090                 if (s->bbio == s->wbio)
3091                         s->wbio=BIO_pop(s->wbio);
3092                 }
3093         (void)BIO_reset(bbio);
3094 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3095         if (!BIO_set_read_buffer_size(bbio,1))
3096                 {
3097                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3098                 return(0);
3099                 }
3100         if (push)
3101                 {
3102                 if (s->wbio != bbio)
3103                         s->wbio=BIO_push(bbio,s->wbio);
3104                 }
3105         else
3106                 {
3107                 if (s->wbio == bbio)
3108                         s->wbio=BIO_pop(bbio);
3109                 }
3110         return(1);
3111         }
3112
3113 void ssl_free_wbio_buffer(SSL *s)
3114         {
3115         if (s->bbio == NULL) return;
3116
3117         if (s->bbio == s->wbio)
3118                 {
3119                 /* remove buffering */
3120                 s->wbio=BIO_pop(s->wbio);
3121 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3122                 assert(s->wbio != NULL);
3123 #endif
3124         }
3125         BIO_free(s->bbio);
3126         s->bbio=NULL;
3127         }
3128
3129 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3130         {
3131         ctx->quiet_shutdown=mode;
3132         }
3133
3134 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3135         {
3136         return(ctx->quiet_shutdown);
3137         }
3138
3139 void SSL_set_quiet_shutdown(SSL *s,int mode)
3140         {
3141         s->quiet_shutdown=mode;
3142         }
3143
3144 int SSL_get_quiet_shutdown(const SSL *s)
3145         {
3146         return(s->quiet_shutdown);
3147         }
3148
3149 void SSL_set_shutdown(SSL *s,int mode)
3150         {
3151         s->shutdown=mode;
3152         }
3153
3154 int SSL_get_shutdown(const SSL *s)
3155         {
3156         return(s->shutdown);
3157         }
3158
3159 int SSL_version(const SSL *s)
3160         {
3161         return(s->version);
3162         }
3163
3164 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3165         {
3166         return(ssl->ctx);
3167         }
3168
3169 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3170         {
3171         CERT *ocert = ssl->cert;
3172         if (ssl->ctx == ctx)
3173                 return ssl->ctx;
3174 #ifndef OPENSSL_NO_TLSEXT
3175         if (ctx == NULL)
3176                 ctx = ssl->initial_ctx;
3177 #endif
3178         ssl->cert = ssl_cert_dup(ctx->cert);
3179         if (ocert)
3180                 {
3181                 /* Preserve any already negotiated parameters */
3182                 if (ssl->server)
3183                         {
3184                         ssl->cert->peer_sigalgs = ocert->peer_sigalgs;
3185                         ssl->cert->peer_sigalgslen = ocert->peer_sigalgslen;
3186                         ocert->peer_sigalgs = NULL;
3187                         ssl->cert->ciphers_raw = ocert->ciphers_raw;
3188                         ssl->cert->ciphers_rawlen = ocert->ciphers_rawlen;
3189                         ocert->ciphers_raw = NULL;
3190                         }
3191                 ssl_cert_free(ocert);
3192                 }
3193         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3194         if (ssl->ctx != NULL)
3195                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3196         ssl->ctx = ctx;
3197         return(ssl->ctx);
3198         }
3199
3200 #ifndef OPENSSL_NO_STDIO
3201 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3202         {
3203         return(X509_STORE_set_default_paths(ctx->cert_store));
3204         }
3205
3206 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3207                 const char *CApath)
3208         {
3209         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3210         }
3211 #endif
3212
3213 void SSL_set_info_callback(SSL *ssl,
3214         void (*cb)(const SSL *ssl,int type,int val))
3215         {
3216         ssl->info_callback=cb;
3217         }
3218
3219 /* One compiler (Diab DCC) doesn't like argument names in returned
3220    function pointer.  */
3221 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3222         {
3223         return ssl->info_callback;
3224         }
3225
3226 int SSL_state(const SSL *ssl)
3227         {
3228         return(ssl->state);
3229         }
3230
3231 void SSL_set_state(SSL *ssl, int state)
3232         {
3233         ssl->state = state;
3234         }
3235
3236 void SSL_set_verify_result(SSL *ssl,long arg)
3237         {
3238         ssl->verify_result=arg;
3239         }
3240
3241 long SSL_get_verify_result(const SSL *ssl)
3242         {
3243         return(ssl->verify_result);
3244         }
3245
3246 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3247                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3248         {
3249         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3250                                 new_func, dup_func, free_func);
3251         }
3252
3253 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3254         {
3255         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3256         }
3257
3258 void *SSL_get_ex_data(const SSL *s,int idx)
3259         {
3260         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3261         }
3262
3263 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3264                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3265         {
3266         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3267                                 new_func, dup_func, free_func);
3268         }
3269
3270 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3271         {
3272         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3273         }
3274
3275 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3276         {
3277         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3278         }
3279
3280 int ssl_ok(SSL *s)
3281         {
3282         return(1);
3283         }
3284
3285 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3286         {
3287         return(ctx->cert_store);
3288         }
3289
3290 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3291         {
3292         if (ctx->cert_store != NULL)
3293                 X509_STORE_free(ctx->cert_store);
3294         ctx->cert_store=store;
3295         }
3296
3297 int SSL_want(const SSL *s)
3298         {
3299         return(s->rwstate);
3300         }
3301
3302 /*!
3303  * \brief Set the callback for generating temporary RSA keys.
3304  * \param ctx the SSL context.
3305  * \param cb the callback
3306  */
3307
3308 #ifndef OPENSSL_NO_RSA
3309 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3310                                                           int is_export,
3311                                                           int keylength))
3312     {
3313     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3314     }
3315
3316 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3317                                                   int is_export,
3318                                                   int keylength))
3319     {
3320     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3321     }
3322 #endif
3323
3324 #ifdef DOXYGEN
3325 /*!
3326  * \brief The RSA temporary key callback function.
3327  * \param ssl the SSL session.
3328  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3329  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3330  * of the required key in bits.
3331  * \return the temporary RSA key.
3332  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3333  */
3334
3335 RSA *cb(SSL *ssl,int is_export,int keylength)
3336     {}
3337 #endif
3338
3339 /*!
3340  * \brief Set the callback for generating temporary DH keys.
3341  * \param ctx the SSL context.
3342  * \param dh the callback
3343  */
3344
3345 #ifndef OPENSSL_NO_DH
3346 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3347                                                         int keylength))
3348         {
3349         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3350         }
3351
3352 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3353                                                 int keylength))
3354         {
3355         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3356         }
3357 #endif
3358
3359 #ifndef OPENSSL_NO_ECDH
3360 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3361                                                                 int keylength))
3362         {
3363         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3364         }
3365
3366 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3367                                                         int keylength))
3368         {
3369         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3370         }
3371 #endif
3372
3373 #ifndef OPENSSL_NO_PSK
3374 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3375         {
3376         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3377                 {
3378                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3379                 return 0;
3380                 }
3381         if (ctx->psk_identity_hint != NULL)
3382                 OPENSSL_free(ctx->psk_identity_hint);
3383         if (identity_hint != NULL)
3384                 {
3385                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3386                 if (ctx->psk_identity_hint == NULL)
3387                         return 0;
3388                 }
3389         else
3390                 ctx->psk_identity_hint = NULL;
3391         return 1;
3392         }
3393
3394 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3395         {
3396         if (s == NULL)
3397                 return 0;
3398
3399         if (s->session == NULL)
3400                 return 1; /* session not created yet, ignored */
3401
3402         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3403                 {
3404                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3405                 return 0;
3406                 }
3407         if (s->session->psk_identity_hint != NULL)
3408                 OPENSSL_free(s->session->psk_identity_hint);
3409         if (identity_hint != NULL)
3410                 {
3411                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3412                 if (s->session->psk_identity_hint == NULL)
3413                         return 0;
3414                 }
3415         else
3416                 s->session->psk_identity_hint = NULL;
3417         return 1;
3418         }
3419
3420 const char *SSL_get_psk_identity_hint(const SSL *s)
3421         {
3422         if (s == NULL || s->session == NULL)
3423                 return NULL;
3424         return(s->session->psk_identity_hint);
3425         }
3426
3427 const char *SSL_get_psk_identity(const SSL *s)
3428         {
3429         if (s == NULL || s->session == NULL)
3430                 return NULL;
3431         return(s->session->psk_identity);
3432         }
3433
3434 void SSL_set_psk_client_callback(SSL *s,
3435     unsigned int (*cb)(SSL *ssl, const char *hint,
3436                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3437                        unsigned int max_psk_len))
3438         {
3439         s->psk_client_callback = cb;
3440         }
3441
3442 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3443     unsigned int (*cb)(SSL *ssl, const char *hint,
3444                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3445                        unsigned int max_psk_len))
3446         {
3447         ctx->psk_client_callback = cb;
3448         }
3449
3450 void SSL_set_psk_server_callback(SSL *s,
3451     unsigned int (*cb)(SSL *ssl, const char *identity,
3452                        unsigned char *psk, unsigned int max_psk_len))
3453         {
3454         s->psk_server_callback = cb;
3455         }
3456
3457 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3458     unsigned int (*cb)(SSL *ssl, const char *identity,
3459                        unsigned char *psk, unsigned int max_psk_len))
3460         {
3461         ctx->psk_server_callback = cb;
3462         }
3463 #endif
3464
3465 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))
3466         {
3467         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3468         }
3469 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))
3470         {
3471         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3472         }
3473
3474 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3475         int (*cb)(SSL *ssl, int is_forward_secure))
3476         {
3477         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3478                 (void (*)(void))cb);
3479         }
3480 void SSL_set_not_resumable_session_callback(SSL *ssl,
3481         int (*cb)(SSL *ssl, int is_forward_secure))
3482         {
3483         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3484                 (void (*)(void))cb);
3485         }
3486
3487 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3488  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3489  * any. If EVP_MD pointer is passed, initializes ctx with this md
3490  * Returns newly allocated ctx;
3491  */
3492
3493 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3494 {
3495         ssl_clear_hash_ctx(hash);
3496         *hash = EVP_MD_CTX_create();
3497         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3498         return *hash;
3499 }
3500 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3501 {
3502
3503         if (*hash) EVP_MD_CTX_destroy(*hash);
3504         *hash=NULL;
3505 }
3506
3507 void SSL_set_debug(SSL *s, int debug)
3508         {
3509         s->debug = debug;
3510         }
3511
3512 int SSL_cache_hit(SSL *s)
3513         {
3514         return s->hit;
3515         }
3516
3517 int SSL_is_server(SSL *s)
3518         {
3519         return s->server;
3520         }
3521
3522 void SSL_set_security_level(SSL *s, int level)
3523         {
3524         s->cert->sec_level = level;
3525         }
3526
3527 int SSL_get_security_level(const SSL *s)
3528         {
3529         return s->cert->sec_level;
3530         }
3531
3532 void SSL_set_security_callback(SSL *s, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
3533         {
3534         s->cert->sec_cb = cb;
3535         }
3536
3537 int (*SSL_get_security_callback(const SSL *s))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
3538         {
3539         return s->cert->sec_cb;
3540         }
3541
3542 void SSL_set0_security_ex_data(SSL *s, void *ex)
3543         {
3544         s->cert->sec_ex = ex;
3545         }
3546
3547 void *SSL_get0_security_ex_data(const SSL *s)
3548         {
3549         return s->cert->sec_ex;
3550         }
3551
3552 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
3553         {
3554         ctx->cert->sec_level = level;
3555         }
3556
3557 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
3558         {
3559         return ctx->cert->sec_level;
3560         }
3561
3562 void SSL_CTX_set_security_callback(SSL_CTX *ctx, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
3563         {
3564         ctx->cert->sec_cb = cb;
3565         }
3566
3567 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
3568         {
3569         return ctx->cert->sec_cb;
3570         }
3571
3572 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
3573         {
3574         ctx->cert->sec_ex = ex;
3575         }
3576
3577 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
3578         {
3579         return ctx->cert->sec_ex;
3580         }
3581
3582 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3583 #include "../crypto/bio/bss_file.c"
3584 #endif
3585
3586 IMPLEMENT_STACK_OF(SSL_CIPHER)
3587 IMPLEMENT_STACK_OF(SSL_COMP)
3588 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3589                                     ssl_cipher_id);