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                 SSL_free(s);
 421         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 422         return(NULL);
 423         }
 424
 425 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 426                                    unsigned int sid_ctx_len)
 427     {
 428     if(sid_ctx_len > sizeof ctx->sid_ctx)
 429         {
 430         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 431         return 0;
 432         }
 433     ctx->sid_ctx_length=sid_ctx_len;
 434     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 435
 436     return 1;
 437     }
 438
 439 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 440                                unsigned int sid_ctx_len)
 441     {
 442     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 443         {
 444         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 445         return 0;
 446         }
 447     ssl->sid_ctx_length=sid_ctx_len;
 448     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 449
 450     return 1;
 451     }
 452
 453 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 454         {
 455         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 456         ctx->generate_session_id = cb;
 457         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 458         return 1;
 459         }
 460
 461 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 462         {
 463         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 464         ssl->generate_session_id = cb;
 465         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 466         return 1;
 467         }
 468
 469 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 470                                 unsigned int id_len)
 471         {
 472         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 473          * we can "construct" a session to give us the desired check - ie. to
 474          * find if there's a session in the hash table that would conflict with
 475          * any new session built out of this id/id_len and the ssl_version in
 476          * use by this SSL. */
 477         SSL_SESSION r, *p;
 478
 479         if(id_len > sizeof r.session_id)
 480                 return 0;
 481
 482         r.ssl_version = ssl->version;
 483         r.session_id_length = id_len;
 484         memcpy(r.session_id, id, id_len);
 485
 486         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 487         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 488         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 489         return (p != NULL);
 490         }
 491
 492 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 493         {
 494         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 495         }
 496
 497 int SSL_set_purpose(SSL *s, int purpose)
 498         {
 499         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 500         }
 501
 502 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 503         {
 504         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 505         }
 506
 507 int SSL_set_trust(SSL *s, int trust)
 508         {
 509         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 510         }
 511
 512 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 513         {
 514         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 515         }
 516
 517 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 518         {
 519         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 520         }
 521
 522 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
 523         {
 524         return ctx->param;
 525         }
 526
 527 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
 528         {
 529         return ssl->param;
 530         }
 531
 532 void SSL_certs_clear(SSL *s)
 533         {
 534         ssl_cert_clear_certs(s->cert);
 535         }
 536
 537 void SSL_free(SSL *s)
 538         {
 539         int i;
 540
 541         if(s == NULL)
 542             return;
 543
 544         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 545 #ifdef REF_PRINT
 546         REF_PRINT("SSL",s);
 547 #endif
 548         if (i > 0) return;
 549 #ifdef REF_CHECK
 550         if (i < 0)
 551                 {
 552                 fprintf(stderr,"SSL_free, bad reference count\n");
 553                 abort(); /* ok */
 554                 }
 555 #endif
 556
 557         if (s->param)
 558                 X509_VERIFY_PARAM_free(s->param);
 559
 560         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 561
 562         if (s->bbio != NULL)
 563                 {
 564                 /* If the buffering BIO is in place, pop it off */
 565                 if (s->bbio == s->wbio)
 566                         {
 567                         s->wbio=BIO_pop(s->wbio);
 568                         }
 569                 BIO_free(s->bbio);
 570                 s->bbio=NULL;
 571                 }
 572         if (s->rbio != NULL)
 573                 BIO_free_all(s->rbio);
 574         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 575                 BIO_free_all(s->wbio);
 576
 577         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 578
 579         /* add extra stuff */
 580         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 581         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 582
 583         /* Make the next call work :-) */
 584         if (s->session != NULL)
 585                 {
 586                 ssl_clear_bad_session(s);
 587                 SSL_SESSION_free(s->session);
 588                 }
 589
 590         ssl_clear_cipher_ctx(s);
 591         ssl_clear_hash_ctx(&s->read_hash);
 592         ssl_clear_hash_ctx(&s->write_hash);
 593
 594         if (s->cert != NULL) ssl_cert_free(s->cert);
 595         /* Free up if allocated */
 596
 597 #ifndef OPENSSL_NO_TLSEXT
 598         if (s->tlsext_hostname)
 599                 OPENSSL_free(s->tlsext_hostname);
 600         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 601 #ifndef OPENSSL_NO_EC
 602         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 603         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 604 #endif /* OPENSSL_NO_EC */
 605         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 606         if (s->tlsext_ocsp_exts)
 607                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 608                                                 X509_EXTENSION_free);
 609         if (s->tlsext_ocsp_ids)
 610                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 611         if (s->tlsext_ocsp_resp)
 612                 OPENSSL_free(s->tlsext_ocsp_resp);
 613         if (s->alpn_client_proto_list)
 614                 OPENSSL_free(s->alpn_client_proto_list);
 615 #endif
 616
 617         if (s->client_CA != NULL)
 618                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 619
 620         if (s->method != NULL) s->method->ssl_free(s);
 621
 622         if (s->ctx) SSL_CTX_free(s->ctx);
 623
 624 #ifndef OPENSSL_NO_KRB5
 625         if (s->kssl_ctx != NULL)
 626                 kssl_ctx_free(s->kssl_ctx);
 627 #endif  /* OPENSSL_NO_KRB5 */
 628
 629 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 630         if (s->next_proto_negotiated)
 631                 OPENSSL_free(s->next_proto_negotiated);
 632 #endif
 633
 634         if (s->srtp_profiles)
 635             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 636
 637         OPENSSL_free(s);
 638         }
 639
 640 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 641         {
 642         /* If the output buffering BIO is still in place, remove it
 643          */
 644         if (s->bbio != NULL)
 645                 {
 646                 if (s->wbio == s->bbio)
 647                         {
 648                         s->wbio=s->wbio->next_bio;
 649                         s->bbio->next_bio=NULL;
 650                         }
 651                 }
 652         if ((s->rbio != NULL) && (s->rbio != rbio))
 653                 BIO_free_all(s->rbio);
 654         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 655                 BIO_free_all(s->wbio);
 656         s->rbio=rbio;
 657         s->wbio=wbio;
 658         }
 659
 660 BIO *SSL_get_rbio(const SSL *s)
 661         { return(s->rbio); }
 662
 663 BIO *SSL_get_wbio(const SSL *s)
 664         { return(s->wbio); }
 665
 666 int SSL_get_fd(const SSL *s)
 667         {
 668         return(SSL_get_rfd(s));
 669         }
 670
 671 int SSL_get_rfd(const SSL *s)
 672         {
 673         int ret= -1;
 674         BIO *b,*r;
 675
 676         b=SSL_get_rbio(s);
 677         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 678         if (r != NULL)
 679                 BIO_get_fd(r,&ret);
 680         return(ret);
 681         }
 682
 683 int SSL_get_wfd(const SSL *s)
 684         {
 685         int ret= -1;
 686         BIO *b,*r;
 687
 688         b=SSL_get_wbio(s);
 689         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 690         if (r != NULL)
 691                 BIO_get_fd(r,&ret);
 692         return(ret);
 693         }
 694
 695 #ifndef OPENSSL_NO_SOCK
 696 int SSL_set_fd(SSL *s,int fd)
 697         {
 698         int ret=0;
 699         BIO *bio=NULL;
 700
 701         bio=BIO_new(BIO_s_socket());
 702
 703         if (bio == NULL)
 704                 {
 705                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 706                 goto err;
 707                 }
 708         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 709         SSL_set_bio(s,bio,bio);
 710         ret=1;
 711 err:
 712         return(ret);
 713         }
 714
 715 int SSL_set_wfd(SSL *s,int fd)
 716         {
 717         int ret=0;
 718         BIO *bio=NULL;
 719
 720         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 721                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 722                 {
 723                 bio=BIO_new(BIO_s_socket());
 724
 725                 if (bio == NULL)
 726                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 727                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 728                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 729                 }
 730         else
 731                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 732         ret=1;
 733 err:
 734         return(ret);
 735         }
 736
 737 int SSL_set_rfd(SSL *s,int fd)
 738         {
 739         int ret=0;
 740         BIO *bio=NULL;
 741
 742         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 743                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 744                 {
 745                 bio=BIO_new(BIO_s_socket());
 746
 747                 if (bio == NULL)
 748                         {
 749                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 750                         goto err;
 751                         }
 752                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 753                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 754                 }
 755         else
 756                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 757         ret=1;
 758 err:
 759         return(ret);
 760         }
 761 #endif
 762
 763
 764 /* return length of latest Finished message we sent, copy to 'buf' */
 765 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 766         {
 767         size_t ret = 0;
 768
 769         if (s->s3 != NULL)
 770                 {
 771                 ret = s->s3->tmp.finish_md_len;
 772                 if (count > ret)
 773                         count = ret;
 774                 memcpy(buf, s->s3->tmp.finish_md, count);
 775                 }
 776         return ret;
 777         }
 778
 779 /* return length of latest Finished message we expected, copy to 'buf' */
 780 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 781         {
 782         size_t ret = 0;
 783
 784         if (s->s3 != NULL)
 785                 {
 786                 ret = s->s3->tmp.peer_finish_md_len;
 787                 if (count > ret)
 788                         count = ret;
 789                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 790                 }
 791         return ret;
 792         }
 793
 794
 795 int SSL_get_verify_mode(const SSL *s)
 796         {
 797         return(s->verify_mode);
 798         }
 799
 800 int SSL_get_verify_depth(const SSL *s)
 801         {
 802         return X509_VERIFY_PARAM_get_depth(s->param);
 803         }
 804
 805 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 806         {
 807         return(s->verify_callback);
 808         }
 809
 810 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 811         {
 812         return(ctx->verify_mode);
 813         }
 814
 815 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 816         {
 817         return X509_VERIFY_PARAM_get_depth(ctx->param);
 818         }
 819
 820 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 821         {
 822         return(ctx->default_verify_callback);
 823         }
 824
 825 void SSL_set_verify(SSL *s,int mode,
 826                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 827         {
 828         s->verify_mode=mode;
 829         if (callback != NULL)
 830                 s->verify_callback=callback;
 831         }
 832
 833 void SSL_set_verify_depth(SSL *s,int depth)
 834         {
 835         X509_VERIFY_PARAM_set_depth(s->param, depth);
 836         }
 837
 838 void SSL_set_read_ahead(SSL *s,int yes)
 839         {
 840         s->read_ahead=yes;
 841         }
 842
 843 int SSL_get_read_ahead(const SSL *s)
 844         {
 845         return(s->read_ahead);
 846         }
 847
 848 int SSL_pending(const SSL *s)
 849         {
 850         /* SSL_pending cannot work properly if read-ahead is enabled
 851          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 852          * and it is impossible to fix since SSL_pending cannot report
 853          * errors that may be observed while scanning the new data.
 854          * (Note that SSL_pending() is often used as a boolean value,
 855          * so we'd better not return -1.)
 856          */
 857         return(s->method->ssl_pending(s));
 858         }
 859
 860 X509 *SSL_get_peer_certificate(const SSL *s)
 861         {
 862         X509 *r;
 863
 864         if ((s == NULL) || (s->session == NULL))
 865                 r=NULL;
 866         else
 867                 r=s->session->peer;
 868
 869         if (r == NULL) return(r);
 870
 871         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 872
 873         return(r);
 874         }
 875
 876 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 877         {
 878         STACK_OF(X509) *r;
 879
 880         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 881                 r=NULL;
 882         else
 883                 r=s->session->sess_cert->cert_chain;
 884
 885         /* If we are a client, cert_chain includes the peer's own
 886          * certificate; if we are a server, it does not. */
 887
 888         return(r);
 889         }
 890
 891 /* Now in theory, since the calling process own 't' it should be safe to
 892  * modify.  We need to be able to read f without being hassled */
 893 void SSL_copy_session_id(SSL *t,const SSL *f)
 894         {
 895         CERT *tmp;
 896
 897         /* Do we need to to SSL locking? */
 898         SSL_set_session(t,SSL_get_session(f));
 899
 900         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 901          * vice-versa */
 902         if (t->method != f->method)
 903                 {
 904                 t->method->ssl_free(t); /* cleanup current */
 905                 t->method=f->method;    /* change method */
 906                 t->method->ssl_new(t);  /* setup new */
 907                 }
 908
 909         tmp=t->cert;
 910         if (f->cert != NULL)
 911                 {
 912                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 913                 t->cert=f->cert;
 914                 }
 915         else
 916                 t->cert=NULL;
 917         if (tmp != NULL) ssl_cert_free(tmp);
 918         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 919         }
 920
 921 /* Fix this so it checks all the valid key/cert options */
 922 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 923         {
 924         if (    (ctx == NULL) ||
 925                 (ctx->cert == NULL) ||
 926                 (ctx->cert->key->x509 == NULL))
 927                 {
 928                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 929                 return(0);
 930                 }
 931         if      (ctx->cert->key->privatekey == NULL)
 932                 {
 933                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 934                 return(0);
 935                 }
 936         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 937         }
 938
 939 /* Fix this function so that it takes an optional type parameter */
 940 int SSL_check_private_key(const SSL *ssl)
 941         {
 942         if (ssl == NULL)
 943                 {
 944                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 945                 return(0);
 946                 }
 947         if (ssl->cert == NULL)
 948                 {
 949                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 950                 return 0;
 951                 }
 952         if (ssl->cert->key->x509 == NULL)
 953                 {
 954                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 955                 return(0);
 956                 }
 957         if (ssl->cert->key->privatekey == NULL)
 958                 {
 959                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 960                 return(0);
 961                 }
 962         return(X509_check_private_key(ssl->cert->key->x509,
 963                 ssl->cert->key->privatekey));
 964         }
 965
 966 int SSL_accept(SSL *s)
 967         {
 968         if (s->handshake_func == 0)
 969                 /* Not properly initialized yet */
 970                 SSL_set_accept_state(s);
 971
 972         return(s->method->ssl_accept(s));
 973         }
 974
 975 int SSL_connect(SSL *s)
 976         {
 977         if (s->handshake_func == 0)
 978                 /* Not properly initialized yet */
 979                 SSL_set_connect_state(s);
 980
 981         return(s->method->ssl_connect(s));
 982         }
 983
 984 long SSL_get_default_timeout(const SSL *s)
 985         {
 986         return(s->method->get_timeout());
 987         }
 988
 989 int SSL_read(SSL *s,void *buf,int num)
 990         {
 991         if (s->handshake_func == 0)
 992                 {
 993                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 994                 return -1;
 995                 }
 996
 997         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 998                 {
 999                 s->rwstate=SSL_NOTHING;
1000                 return(0);
1001                 }
1002         return(s->method->ssl_read(s,buf,num));
1003         }
1004
1005 int SSL_peek(SSL *s,void *buf,int num)
1006         {
1007         if (s->handshake_func == 0)
1008                 {
1009                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1010                 return -1;
1011                 }
1012
1013         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1014                 {
1015                 return(0);
1016                 }
1017         return(s->method->ssl_peek(s,buf,num));
1018         }
1019
1020 int SSL_write(SSL *s,const void *buf,int num)
1021         {
1022         if (s->handshake_func == 0)
1023                 {
1024                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1025                 return -1;
1026                 }
1027
1028         if (s->shutdown & SSL_SENT_SHUTDOWN)
1029                 {
1030                 s->rwstate=SSL_NOTHING;
1031                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1032                 return(-1);
1033                 }
1034         return(s->method->ssl_write(s,buf,num));
1035         }
1036
1037 int SSL_shutdown(SSL *s)
1038         {
1039         /* Note that this function behaves differently from what one might
1040          * expect.  Return values are 0 for no success (yet),
1041          * 1 for success; but calling it once is usually not enough,
1042          * even if blocking I/O is used (see ssl3_shutdown).
1043          */
1044
1045         if (s->handshake_func == 0)
1046                 {
1047                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1048                 return -1;
1049                 }
1050
1051         if ((s != NULL) && !SSL_in_init(s))
1052                 return(s->method->ssl_shutdown(s));
1053         else
1054                 return(1);
1055         }
1056
1057 int SSL_renegotiate(SSL *s)
1058         {
1059         if (s->renegotiate == 0)
1060                 s->renegotiate=1;
1061
1062         s->new_session=1;
1063
1064         return(s->method->ssl_renegotiate(s));
1065         }
1066
1067 int SSL_renegotiate_abbreviated(SSL *s)
1068         {
1069         if (s->renegotiate == 0)
1070                 s->renegotiate=1;
1071
1072         s->new_session=0;
1073
1074         return(s->method->ssl_renegotiate(s));
1075         }
1076
1077 int SSL_renegotiate_pending(SSL *s)
1078         {
1079         /* becomes true when negotiation is requested;
1080          * false again once a handshake has finished */
1081         return (s->renegotiate != 0);
1082         }
1083
1084 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1085         {
1086         long l;
1087
1088         switch (cmd)
1089                 {
1090         case SSL_CTRL_GET_READ_AHEAD:
1091                 return(s->read_ahead);
1092         case SSL_CTRL_SET_READ_AHEAD:
1093                 l=s->read_ahead;
1094                 s->read_ahead=larg;
1095                 return(l);
1096
1097         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1098                 s->msg_callback_arg = parg;
1099                 return 1;
1100
1101         case SSL_CTRL_OPTIONS:
1102                 return(s->options|=larg);
1103         case SSL_CTRL_CLEAR_OPTIONS:
1104                 return(s->options&=~larg);
1105         case SSL_CTRL_MODE:
1106                 return(s->mode|=larg);
1107         case SSL_CTRL_CLEAR_MODE:
1108                 return(s->mode &=~larg);
1109         case SSL_CTRL_GET_MAX_CERT_LIST:
1110                 return(s->max_cert_list);
1111         case SSL_CTRL_SET_MAX_CERT_LIST:
1112                 l=s->max_cert_list;
1113                 s->max_cert_list=larg;
1114                 return(l);
1115         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1116                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1117                         return 0;
1118                 s->max_send_fragment = larg;
1119                 return 1;
1120         case SSL_CTRL_GET_RI_SUPPORT:
1121                 if (s->s3)
1122                         return s->s3->send_connection_binding;
1123                 else return 0;
1124         case SSL_CTRL_CERT_FLAGS:
1125                 return(s->cert->cert_flags|=larg);
1126         case SSL_CTRL_CLEAR_CERT_FLAGS:
1127                 return(s->cert->cert_flags &=~larg);
1128
1129         case SSL_CTRL_GET_RAW_CIPHERLIST:
1130                 if (parg)
1131                         {
1132                         if (s->cert->ciphers_raw == NULL)
1133                                 return 0;
1134                         *(unsigned char **)parg = s->cert->ciphers_raw;
1135                         return (int)s->cert->ciphers_rawlen;
1136                         }
1137                 else
1138                         return ssl_put_cipher_by_char(s,NULL,NULL);
1139         default:
1140                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1141                 }
1142         }
1143
1144 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1145         {
1146         switch(cmd)
1147                 {
1148         case SSL_CTRL_SET_MSG_CALLBACK:
1149                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1150                 return 1;
1151
1152         default:
1153                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1154                 }
1155         }
1156
1157 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1158         {
1159         return ctx->sessions;
1160         }
1161
1162 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1163         {
1164         long l;
1165         /* For some cases with ctx == NULL perform syntax checks */
1166         if (ctx == NULL)
1167                 {
1168                 switch (cmd)
1169                         {
1170 #ifndef OPENSSL_NO_EC
1171                 case SSL_CTRL_SET_CURVES_LIST:
1172                         return tls1_set_curves_list(NULL, NULL, parg);
1173 #endif
1174                 case SSL_CTRL_SET_SIGALGS_LIST:
1175                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1176                         return tls1_set_sigalgs_list(NULL, parg, 0);
1177                 default:
1178                         return 0;
1179                         }
1180                 }
1181
1182         switch (cmd)
1183                 {
1184         case SSL_CTRL_GET_READ_AHEAD:
1185                 return(ctx->read_ahead);
1186         case SSL_CTRL_SET_READ_AHEAD:
1187                 l=ctx->read_ahead;
1188                 ctx->read_ahead=larg;
1189                 return(l);
1190
1191         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1192                 ctx->msg_callback_arg = parg;
1193                 return 1;
1194
1195         case SSL_CTRL_GET_MAX_CERT_LIST:
1196                 return(ctx->max_cert_list);
1197         case SSL_CTRL_SET_MAX_CERT_LIST:
1198                 l=ctx->max_cert_list;
1199                 ctx->max_cert_list=larg;
1200                 return(l);
1201
1202         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1203                 l=ctx->session_cache_size;
1204                 ctx->session_cache_size=larg;
1205                 return(l);
1206         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1207                 return(ctx->session_cache_size);
1208         case SSL_CTRL_SET_SESS_CACHE_MODE:
1209                 l=ctx->session_cache_mode;
1210                 ctx->session_cache_mode=larg;
1211                 return(l);
1212         case SSL_CTRL_GET_SESS_CACHE_MODE:
1213                 return(ctx->session_cache_mode);
1214
1215         case SSL_CTRL_SESS_NUMBER:
1216                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1217         case SSL_CTRL_SESS_CONNECT:
1218                 return(ctx->stats.sess_connect);
1219         case SSL_CTRL_SESS_CONNECT_GOOD:
1220                 return(ctx->stats.sess_connect_good);
1221         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1222                 return(ctx->stats.sess_connect_renegotiate);
1223         case SSL_CTRL_SESS_ACCEPT:
1224                 return(ctx->stats.sess_accept);
1225         case SSL_CTRL_SESS_ACCEPT_GOOD:
1226                 return(ctx->stats.sess_accept_good);
1227         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1228                 return(ctx->stats.sess_accept_renegotiate);
1229         case SSL_CTRL_SESS_HIT:
1230                 return(ctx->stats.sess_hit);
1231         case SSL_CTRL_SESS_CB_HIT:
1232                 return(ctx->stats.sess_cb_hit);
1233         case SSL_CTRL_SESS_MISSES:
1234                 return(ctx->stats.sess_miss);
1235         case SSL_CTRL_SESS_TIMEOUTS:
1236                 return(ctx->stats.sess_timeout);
1237         case SSL_CTRL_SESS_CACHE_FULL:
1238                 return(ctx->stats.sess_cache_full);
1239         case SSL_CTRL_OPTIONS:
1240                 return(ctx->options|=larg);
1241         case SSL_CTRL_CLEAR_OPTIONS:
1242                 return(ctx->options&=~larg);
1243         case SSL_CTRL_MODE:
1244                 return(ctx->mode|=larg);
1245         case SSL_CTRL_CLEAR_MODE:
1246                 return(ctx->mode&=~larg);
1247         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1248                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1249                         return 0;
1250                 ctx->max_send_fragment = larg;
1251                 return 1;
1252         case SSL_CTRL_CERT_FLAGS:
1253                 return(ctx->cert->cert_flags|=larg);
1254         case SSL_CTRL_CLEAR_CERT_FLAGS:
1255                 return(ctx->cert->cert_flags &=~larg);
1256         default:
1257                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1258                 }
1259         }
1260
1261 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1262         {
1263         switch(cmd)
1264                 {
1265         case SSL_CTRL_SET_MSG_CALLBACK:
1266                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1267                 return 1;
1268
1269         default:
1270                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1271                 }
1272         }
1273
1274 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1275         {
1276         long l;
1277
1278         l=a->id-b->id;
1279         if (l == 0L)
1280                 return(0);
1281         else
1282                 return((l > 0)?1:-1);
1283         }
1284
1285 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1286                         const SSL_CIPHER * const *bp)
1287         {
1288         long l;
1289
1290         l=(*ap)->id-(*bp)->id;
1291         if (l == 0L)
1292                 return(0);
1293         else
1294                 return((l > 0)?1:-1);
1295         }
1296
1297 /** return a STACK of the ciphers available for the SSL and in order of
1298  * preference */
1299 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1300         {
1301         if (s != NULL)
1302                 {
1303                 if (s->cipher_list != NULL)
1304                         {
1305                         return(s->cipher_list);
1306                         }
1307                 else if ((s->ctx != NULL) &&
1308                         (s->ctx->cipher_list != NULL))
1309                         {
1310                         return(s->ctx->cipher_list);
1311                         }
1312                 }
1313         return(NULL);
1314         }
1315
1316 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
1317         {
1318         STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
1319         int i;
1320         ciphers = SSL_get_ciphers(s);
1321         if (!ciphers)
1322                 return NULL;
1323         ssl_set_client_disabled(s);
1324         for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
1325                 {
1326                 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
1327                 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
1328                         {
1329                         if (!sk)
1330                                 sk = sk_SSL_CIPHER_new_null();
1331                         if (!sk)
1332                                 return NULL;
1333                         if (!sk_SSL_CIPHER_push(sk, c))
1334                                 {
1335                                 sk_SSL_CIPHER_free(sk);
1336                                 return NULL;
1337                                 }
1338                         }
1339                 }
1340         return sk;
1341         }
1342
1343 /** return a STACK of the ciphers available for the SSL and in order of
1344  * algorithm id */
1345 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1346         {
1347         if (s != NULL)
1348                 {
1349                 if (s->cipher_list_by_id != NULL)
1350                         {
1351                         return(s->cipher_list_by_id);
1352                         }
1353                 else if ((s->ctx != NULL) &&
1354                         (s->ctx->cipher_list_by_id != NULL))
1355                         {
1356                         return(s->ctx->cipher_list_by_id);
1357                         }
1358                 }
1359         return(NULL);
1360         }
1361
1362 /** The old interface to get the same thing as SSL_get_ciphers() */
1363 const char *SSL_get_cipher_list(const SSL *s,int n)
1364         {
1365         SSL_CIPHER *c;
1366         STACK_OF(SSL_CIPHER) *sk;
1367
1368         if (s == NULL) return(NULL);
1369         sk=SSL_get_ciphers(s);
1370         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1371                 return(NULL);
1372         c=sk_SSL_CIPHER_value(sk,n);
1373         if (c == NULL) return(NULL);
1374         return(c->name);
1375         }
1376
1377 /** specify the ciphers to be used by default by the SSL_CTX */
1378 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1379         {
1380         STACK_OF(SSL_CIPHER) *sk;
1381
1382         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1383                 &ctx->cipher_list_by_id,str, ctx->cert);
1384         /* ssl_create_cipher_list may return an empty stack if it
1385          * was unable to find a cipher matching the given rule string
1386          * (for example if the rule string specifies a cipher which
1387          * has been disabled). This is not an error as far as
1388          * ssl_create_cipher_list is concerned, and hence
1389          * ctx->cipher_list and ctx->cipher_list_by_id has been
1390          * updated. */
1391         if (sk == NULL)
1392                 return 0;
1393         else if (sk_SSL_CIPHER_num(sk) == 0)
1394                 {
1395                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1396                 return 0;
1397                 }
1398         return 1;
1399         }
1400
1401 /** specify the ciphers to be used by the SSL */
1402 int SSL_set_cipher_list(SSL *s,const char *str)
1403         {
1404         STACK_OF(SSL_CIPHER) *sk;
1405
1406         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1407                 &s->cipher_list_by_id,str, s->cert);
1408         /* see comment in SSL_CTX_set_cipher_list */
1409         if (sk == NULL)
1410                 return 0;
1411         else if (sk_SSL_CIPHER_num(sk) == 0)
1412                 {
1413                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1414                 return 0;
1415                 }
1416         return 1;
1417         }
1418
1419 /* works well for SSLv2, not so good for SSLv3 */
1420 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1421         {
1422         char *p;
1423         STACK_OF(SSL_CIPHER) *sk;
1424         SSL_CIPHER *c;
1425         int i;
1426
1427         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1428                 (len < 2))
1429                 return(NULL);
1430
1431         p=buf;
1432         sk=s->session->ciphers;
1433
1434         if (sk_SSL_CIPHER_num(sk) == 0)
1435                 return NULL;
1436
1437         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1438                 {
1439                 int n;
1440
1441                 c=sk_SSL_CIPHER_value(sk,i);
1442                 n=strlen(c->name);
1443                 if (n+1 > len)
1444                         {
1445                         if (p != buf)
1446                                 --p;
1447                         *p='\0';
1448                         return buf;
1449                         }
1450                 strcpy(p,c->name);
1451                 p+=n;
1452                 *(p++)=':';
1453                 len-=n+1;
1454                 }
1455         p[-1]='\0';
1456         return(buf);
1457         }
1458
1459 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1460                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1461         {
1462         int i,j=0;
1463         SSL_CIPHER *c;
1464         unsigned char *q;
1465         int empty_reneg_info_scsv = !s->renegotiate;
1466         /* Set disabled masks for this session */
1467         ssl_set_client_disabled(s);
1468
1469         if (sk == NULL) return(0);
1470         q=p;
1471         if (put_cb == NULL)
1472                 put_cb = s->method->put_cipher_by_char;
1473
1474         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1475                 {
1476                 c=sk_SSL_CIPHER_value(sk,i);
1477                 /* Skip disabled ciphers */
1478                 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
1479                         continue;
1480 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1481                 if (c->id == SSL3_CK_SCSV)
1482                         {
1483                         if (!empty_reneg_info_scsv)
1484                                 continue;
1485                         else
1486                                 empty_reneg_info_scsv = 0;
1487                         }
1488 #endif
1489                 j = put_cb(c,p);
1490                 p+=j;
1491                 }
1492         /* If p == q, no ciphers; caller indicates an error.
1493          * Otherwise, add applicable SCSVs. */
1494         if (p != q)
1495                 {
1496                 if (empty_reneg_info_scsv)
1497                         {
1498                         static SSL_CIPHER scsv =
1499                                 {
1500                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1501                                 };
1502                         j = put_cb(&scsv,p);
1503                         p+=j;
1504 #ifdef OPENSSL_RI_DEBUG
1505                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1506 #endif
1507                         }
1508                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1509                         {
1510                         static SSL_CIPHER scsv =
1511                                 {
1512                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1513                                 };
1514                         j = put_cb(&scsv,p);
1515                         p+=j;
1516                         }
1517                 }
1518
1519         return(p-q);
1520         }
1521
1522 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1523                                                STACK_OF(SSL_CIPHER) **skp)
1524         {
1525         const SSL_CIPHER *c;
1526         STACK_OF(SSL_CIPHER) *sk;
1527         int i,n;
1528
1529         if (s->s3)
1530                 s->s3->send_connection_binding = 0;
1531
1532         n=ssl_put_cipher_by_char(s,NULL,NULL);
1533         if (n == 0 || (num%n) != 0)
1534                 {
1535                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1536                 return(NULL);
1537                 }
1538         if ((skp == NULL) || (*skp == NULL))
1539                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1540         else
1541                 {
1542                 sk= *skp;
1543                 sk_SSL_CIPHER_zero(sk);
1544                 }
1545
1546         if (s->cert->ciphers_raw)
1547                 OPENSSL_free(s->cert->ciphers_raw);
1548         s->cert->ciphers_raw = BUF_memdup(p, num);
1549         if (s->cert->ciphers_raw == NULL)
1550                 {
1551                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1552                 goto err;
1553                 }
1554         s->cert->ciphers_rawlen = (size_t)num;
1555
1556         for (i=0; i<num; i+=n)
1557                 {
1558                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1559                 if (s->s3 && (n != 3 || !p[0]) &&
1560                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1561                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1562                         {
1563                         /* SCSV fatal if renegotiating */
1564                         if (s->renegotiate)
1565                                 {
1566                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1567                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1568                                 goto err;
1569                                 }
1570                         s->s3->send_connection_binding = 1;
1571                         p += n;
1572 #ifdef OPENSSL_RI_DEBUG
1573                         fprintf(stderr, "SCSV received by server\n");
1574 #endif
1575                         continue;
1576                         }
1577
1578                 /* Check for TLS_FALLBACK_SCSV */
1579                 if ((n != 3 || !p[0]) &&
1580                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1581                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1582                         {
1583                         /* The SCSV indicates that the client previously tried a higher version.
1584                          * Fail if the current version is an unexpected downgrade. */
1585                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1586                                 {
1587                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1588                                 if (s->s3)
1589                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1590                                 goto err;
1591                                 }
1592                         p += n;
1593                         continue;
1594                         }
1595
1596                 c=ssl_get_cipher_by_char(s,p);
1597                 p+=n;
1598                 if (c != NULL)
1599                         {
1600                         if (!sk_SSL_CIPHER_push(sk,c))
1601                                 {
1602                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1603                                 goto err;
1604                                 }
1605                         }
1606                 }
1607
1608         if (skp != NULL)
1609                 *skp=sk;
1610         return(sk);
1611 err:
1612         if ((skp == NULL) || (*skp == NULL))
1613                 sk_SSL_CIPHER_free(sk);
1614         return(NULL);
1615         }
1616
1617
1618 #ifndef OPENSSL_NO_TLSEXT
1619 /** return a servername extension value if provided in Client Hello, or NULL.
1620  * So far, only host_name types are defined (RFC 3546).
1621  */
1622
1623 const char *SSL_get_servername(const SSL *s, const int type)
1624         {
1625         if (type != TLSEXT_NAMETYPE_host_name)
1626                 return NULL;
1627
1628         return s->session && !s->tlsext_hostname ?
1629                 s->session->tlsext_hostname :
1630                 s->tlsext_hostname;
1631         }
1632
1633 int SSL_get_servername_type(const SSL *s)
1634         {
1635         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1636                 return TLSEXT_NAMETYPE_host_name;
1637         return -1;
1638         }
1639
1640 /* SSL_select_next_proto implements the standard protocol selection. It is
1641  * expected that this function is called from the callback set by
1642  * SSL_CTX_set_next_proto_select_cb.
1643  *
1644  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1645  * strings. The length byte itself is not included in the length. A byte
1646  * string of length 0 is invalid. No byte string may be truncated.
1647  *
1648  * The current, but experimental algorithm for selecting the protocol is:
1649  *
1650  * 1) If the server doesn't support NPN then this is indicated to the
1651  * callback. In this case, the client application has to abort the connection
1652  * or have a default application level protocol.
1653  *
1654  * 2) If the server supports NPN, but advertises an empty list then the
1655  * client selects the first protcol in its list, but indicates via the
1656  * API that this fallback case was enacted.
1657  *
1658  * 3) Otherwise, the client finds the first protocol in the server's list
1659  * that it supports and selects this protocol. This is because it's
1660  * assumed that the server has better information about which protocol
1661  * a client should use.
1662  *
1663  * 4) If the client doesn't support any of the server's advertised
1664  * protocols, then this is treated the same as case 2.
1665  *
1666  * It returns either
1667  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1668  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1669  */
1670 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)
1671         {
1672         unsigned int i, j;
1673         const unsigned char *result;
1674         int status = OPENSSL_NPN_UNSUPPORTED;
1675
1676         /* For each protocol in server preference order, see if we support it. */
1677         for (i = 0; i < server_len; )
1678                 {
1679                 for (j = 0; j < client_len; )
1680                         {
1681                         if (server[i] == client[j] &&
1682                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1683                                 {
1684                                 /* We found a match */
1685                                 result = &server[i];
1686                                 status = OPENSSL_NPN_NEGOTIATED;
1687                                 goto found;
1688                                 }
1689                         j += client[j];
1690                         j++;
1691                         }
1692                 i += server[i];
1693                 i++;
1694                 }
1695
1696         /* There's no overlap between our protocols and the server's list. */
1697         result = client;
1698         status = OPENSSL_NPN_NO_OVERLAP;
1699
1700         found:
1701         *out = (unsigned char *) result + 1;
1702         *outlen = result[0];
1703         return status;
1704         }
1705
1706 # ifndef OPENSSL_NO_NEXTPROTONEG
1707 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1708  * requested protocol for this connection and returns 0. If the client didn't
1709  * request any protocol, then *data is set to NULL.
1710  *
1711  * Note that the client can request any protocol it chooses. The value returned
1712  * from this function need not be a member of the list of supported protocols
1713  * provided by the callback.
1714  */
1715 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1716         {
1717         *data = s->next_proto_negotiated;
1718         if (!*data) {
1719                 *len = 0;
1720         } else {
1721                 *len = s->next_proto_negotiated_len;
1722         }
1723 }
1724
1725 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1726  * TLS server needs a list of supported protocols for Next Protocol
1727  * Negotiation. The returned list must be in wire format.  The list is returned
1728  * by setting |out| to point to it and |outlen| to its length. This memory will
1729  * not be modified, but one should assume that the SSL* keeps a reference to
1730  * it.
1731  *
1732  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1733  * such extension will be included in the ServerHello. */
1734 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)
1735         {
1736         ctx->next_protos_advertised_cb = cb;
1737         ctx->next_protos_advertised_cb_arg = arg;
1738         }
1739
1740 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1741  * client needs to select a protocol from the server's provided list. |out|
1742  * must be set to point to the selected protocol (which may be within |in|).
1743  * The length of the protocol name must be written into |outlen|. The server's
1744  * advertised protocols are provided in |in| and |inlen|. The callback can
1745  * assume that |in| is syntactically valid.
1746  *
1747  * The client must select a protocol. It is fatal to the connection if this
1748  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1749  */
1750 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)
1751         {
1752         ctx->next_proto_select_cb = cb;
1753         ctx->next_proto_select_cb_arg = arg;
1754         }
1755 # endif
1756
1757 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
1758  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1759  * length-prefixed strings).
1760  *
1761  * Returns 0 on success. */
1762 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
1763                             unsigned protos_len)
1764         {
1765         if (ctx->alpn_client_proto_list)
1766                 OPENSSL_free(ctx->alpn_client_proto_list);
1767
1768         ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1769         if (!ctx->alpn_client_proto_list)
1770                 return 1;
1771         memcpy(ctx->alpn_client_proto_list, protos, protos_len);
1772         ctx->alpn_client_proto_list_len = protos_len;
1773
1774         return 0;
1775         }
1776
1777 /* SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
1778  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1779  * length-prefixed strings).
1780  *
1781  * Returns 0 on success. */
1782 int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
1783                         unsigned protos_len)
1784         {
1785         if (ssl->alpn_client_proto_list)
1786                 OPENSSL_free(ssl->alpn_client_proto_list);
1787
1788         ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1789         if (!ssl->alpn_client_proto_list)
1790                 return 1;
1791         memcpy(ssl->alpn_client_proto_list, protos, protos_len);
1792         ssl->alpn_client_proto_list_len = protos_len;
1793
1794         return 0;
1795         }
1796
1797 /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
1798  * during ClientHello processing in order to select an ALPN protocol from the
1799  * client's list of offered protocols. */
1800 void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
1801                                 int (*cb) (SSL *ssl,
1802                                            const unsigned char **out,
1803                                            unsigned char *outlen,
1804                                            const unsigned char *in,
1805                                            unsigned int inlen,
1806                                            void *arg),
1807                                 void *arg)
1808         {
1809         ctx->alpn_select_cb = cb;
1810         ctx->alpn_select_cb_arg = arg;
1811         }
1812
1813 /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
1814  * On return it sets |*data| to point to |*len| bytes of protocol name (not
1815  * including the leading length-prefix byte). If the server didn't respond with
1816  * a negotiated protocol then |*len| will be zero. */
1817 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1818                             unsigned *len)
1819         {
1820         *data = NULL;
1821         if (ssl->s3)
1822                 *data = ssl->s3->alpn_selected;
1823         if (*data == NULL)
1824                 *len = 0;
1825         else
1826                 *len = ssl->s3->alpn_selected_len;
1827         }
1828
1829 #endif /* !OPENSSL_NO_TLSEXT */
1830
1831 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1832         const char *label, size_t llen, const unsigned char *p, size_t plen,
1833         int use_context)
1834         {
1835         if (s->version < TLS1_VERSION)
1836                 return -1;
1837
1838         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1839                                                            llen, p, plen,
1840                                                            use_context);
1841         }
1842
1843 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1844         {
1845         unsigned long l;
1846
1847         l=(unsigned long)
1848                 ((unsigned int) a->session_id[0]     )|
1849                 ((unsigned int) a->session_id[1]<< 8L)|
1850                 ((unsigned long)a->session_id[2]<<16L)|
1851                 ((unsigned long)a->session_id[3]<<24L);
1852         return(l);
1853         }
1854
1855 /* NB: If this function (or indeed the hash function which uses a sort of
1856  * coarser function than this one) is changed, ensure
1857  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1858  * able to construct an SSL_SESSION that will collide with any existing session
1859  * with a matching session ID. */
1860 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1861         {
1862         if (a->ssl_version != b->ssl_version)
1863                 return(1);
1864         if (a->session_id_length != b->session_id_length)
1865                 return(1);
1866         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1867         }
1868
1869 /* These wrapper functions should remain rather than redeclaring
1870  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1871  * variable. The reason is that the functions aren't static, they're exposed via
1872  * ssl.h. */
1873 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1874 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1875
1876 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1877         {
1878         SSL_CTX *ret=NULL;
1879
1880         if (meth == NULL)
1881                 {
1882                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1883                 return(NULL);
1884                 }
1885
1886         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1887                 {
1888                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1889                 return NULL;
1890                 }
1891
1892         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1893                 {
1894                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1895                 goto err;
1896                 }
1897         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1898         if (ret == NULL)
1899                 goto err;
1900
1901         memset(ret,0,sizeof(SSL_CTX));
1902
1903         ret->method=meth;
1904
1905         ret->cert_store=NULL;
1906         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1907         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1908         ret->session_cache_head=NULL;
1909         ret->session_cache_tail=NULL;
1910
1911         /* We take the system default */
1912         ret->session_timeout=meth->get_timeout();
1913
1914         ret->new_session_cb=0;
1915         ret->remove_session_cb=0;
1916         ret->get_session_cb=0;
1917         ret->generate_session_id=0;
1918
1919         memset((char *)&ret->stats,0,sizeof(ret->stats));
1920
1921         ret->references=1;
1922         ret->quiet_shutdown=0;
1923
1924 /*      ret->cipher=NULL;*/
1925 /*      ret->s2->challenge=NULL;
1926         ret->master_key=NULL;
1927         ret->s2->conn_id=NULL; */
1928
1929         ret->info_callback=NULL;
1930
1931         ret->app_verify_callback=0;
1932         ret->app_verify_arg=NULL;
1933
1934         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1935         ret->read_ahead=0;
1936         ret->msg_callback=0;
1937         ret->msg_callback_arg=NULL;
1938         ret->verify_mode=SSL_VERIFY_NONE;
1939 #if 0
1940         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1941 #endif
1942         ret->sid_ctx_length=0;
1943         ret->default_verify_callback=NULL;
1944         if ((ret->cert=ssl_cert_new()) == NULL)
1945                 goto err;
1946
1947         ret->default_passwd_callback=0;
1948         ret->default_passwd_callback_userdata=NULL;
1949         ret->client_cert_cb=0;
1950         ret->app_gen_cookie_cb=0;
1951         ret->app_verify_cookie_cb=0;
1952
1953         ret->sessions=lh_SSL_SESSION_new();
1954         if (ret->sessions == NULL) goto err;
1955         ret->cert_store=X509_STORE_new();
1956         if (ret->cert_store == NULL) goto err;
1957
1958         ssl_create_cipher_list(ret->method,
1959                 &ret->cipher_list,&ret->cipher_list_by_id,
1960                 SSL_DEFAULT_CIPHER_LIST, ret->cert);
1961         if (ret->cipher_list == NULL
1962             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1963                 {
1964                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1965                 goto err2;
1966                 }
1967
1968         ret->param = X509_VERIFY_PARAM_new();
1969         if (!ret->param)
1970                 goto err;
1971
1972         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1973                 {
1974                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1975                 goto err2;
1976                 }
1977         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1978                 {
1979                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1980                 goto err2;
1981                 }
1982
1983         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1984                 goto err;
1985
1986         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1987
1988         ret->extra_certs=NULL;
1989         /* No compression for DTLS */
1990         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
1991                 ret->comp_methods=SSL_COMP_get_compression_methods();
1992
1993         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1994
1995 #ifndef OPENSSL_NO_TLSEXT
1996         ret->tlsext_servername_callback = 0;
1997         ret->tlsext_servername_arg = NULL;
1998         /* Setup RFC4507 ticket keys */
1999         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
2000                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
2001                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
2002                 ret->options |= SSL_OP_NO_TICKET;
2003
2004         ret->tlsext_status_cb = 0;
2005         ret->tlsext_status_arg = NULL;
2006
2007 # ifndef OPENSSL_NO_NEXTPROTONEG
2008         ret->next_protos_advertised_cb = 0;
2009         ret->next_proto_select_cb = 0;
2010 # endif
2011 #endif
2012 #ifndef OPENSSL_NO_PSK
2013         ret->psk_identity_hint=NULL;
2014         ret->psk_client_callback=NULL;
2015         ret->psk_server_callback=NULL;
2016 #endif
2017 #ifndef OPENSSL_NO_SRP
2018         SSL_CTX_SRP_CTX_init(ret);
2019 #endif
2020 #ifndef OPENSSL_NO_BUF_FREELISTS
2021         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
2022         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2023         if (!ret->rbuf_freelist)
2024                 goto err;
2025         ret->rbuf_freelist->chunklen = 0;
2026         ret->rbuf_freelist->len = 0;
2027         ret->rbuf_freelist->head = NULL;
2028         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2029         if (!ret->wbuf_freelist)
2030                 {
2031                 OPENSSL_free(ret->rbuf_freelist);
2032                 goto err;
2033                 }
2034         ret->wbuf_freelist->chunklen = 0;
2035         ret->wbuf_freelist->len = 0;
2036         ret->wbuf_freelist->head = NULL;
2037 #endif
2038 #ifndef OPENSSL_NO_ENGINE
2039         ret->client_cert_engine = NULL;
2040 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2041 #define eng_strx(x)     #x
2042 #define eng_str(x)      eng_strx(x)
2043         /* Use specific client engine automatically... ignore errors */
2044         {
2045         ENGINE *eng;
2046         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2047         if (!eng)
2048                 {
2049                 ERR_clear_error();
2050                 ENGINE_load_builtin_engines();
2051                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2052                 }
2053         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2054                 ERR_clear_error();
2055         }
2056 #endif
2057 #endif
2058         /* Default is to connect to non-RI servers. When RI is more widely
2059          * deployed might change this.
2060          */
2061         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2062
2063         return(ret);
2064 err:
2065         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2066 err2:
2067         if (ret != NULL) SSL_CTX_free(ret);
2068         return(NULL);
2069         }
2070
2071 #if 0
2072 static void SSL_COMP_free(SSL_COMP *comp)
2073     { OPENSSL_free(comp); }
2074 #endif
2075
2076 #ifndef OPENSSL_NO_BUF_FREELISTS
2077 static void
2078 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2079         {
2080         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2081         for (ent = list->head; ent; ent = next)
2082                 {
2083                 next = ent->next;
2084                 OPENSSL_free(ent);
2085                 }
2086         OPENSSL_free(list);
2087         }
2088 #endif
2089
2090 void SSL_CTX_free(SSL_CTX *a)
2091         {
2092         int i;
2093
2094         if (a == NULL) return;
2095
2096         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2097 #ifdef REF_PRINT
2098         REF_PRINT("SSL_CTX",a);
2099 #endif
2100         if (i > 0) return;
2101 #ifdef REF_CHECK
2102         if (i < 0)
2103                 {
2104                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2105                 abort(); /* ok */
2106                 }
2107 #endif
2108
2109         if (a->param)
2110                 X509_VERIFY_PARAM_free(a->param);
2111
2112         /*
2113          * Free internal session cache. However: the remove_cb() may reference
2114          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2115          * after the sessions were flushed.
2116          * As the ex_data handling routines might also touch the session cache,
2117          * the most secure solution seems to be: empty (flush) the cache, then
2118          * free ex_data, then finally free the cache.
2119          * (See ticket [openssl.org #212].)
2120          */
2121         if (a->sessions != NULL)
2122                 SSL_CTX_flush_sessions(a,0);
2123
2124         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2125
2126         if (a->sessions != NULL)
2127                 lh_SSL_SESSION_free(a->sessions);
2128
2129         if (a->cert_store != NULL)
2130                 X509_STORE_free(a->cert_store);
2131         if (a->cipher_list != NULL)
2132                 sk_SSL_CIPHER_free(a->cipher_list);
2133         if (a->cipher_list_by_id != NULL)
2134                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2135         if (a->cert != NULL)
2136                 ssl_cert_free(a->cert);
2137         if (a->client_CA != NULL)
2138                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2139         if (a->extra_certs != NULL)
2140                 sk_X509_pop_free(a->extra_certs,X509_free);
2141 #if 0 /* This should never be done, since it removes a global database */
2142         if (a->comp_methods != NULL)
2143                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2144 #else
2145         a->comp_methods = NULL;
2146 #endif
2147
2148         if (a->srtp_profiles)
2149                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2150
2151 #ifndef OPENSSL_NO_PSK
2152         if (a->psk_identity_hint)
2153                 OPENSSL_free(a->psk_identity_hint);
2154 #endif
2155 #ifndef OPENSSL_NO_SRP
2156         SSL_CTX_SRP_CTX_free(a);
2157 #endif
2158 #ifndef OPENSSL_NO_ENGINE
2159         if (a->client_cert_engine)
2160                 ENGINE_finish(a->client_cert_engine);
2161 #endif
2162
2163 #ifndef OPENSSL_NO_BUF_FREELISTS
2164         if (a->wbuf_freelist)
2165                 ssl_buf_freelist_free(a->wbuf_freelist);
2166         if (a->rbuf_freelist)
2167                 ssl_buf_freelist_free(a->rbuf_freelist);
2168 #endif
2169 #ifndef OPENSSL_NO_TLSEXT
2170 # ifndef OPENSSL_NO_EC
2171         if (a->tlsext_ecpointformatlist)
2172                 OPENSSL_free(a->tlsext_ecpointformatlist);
2173         if (a->tlsext_ellipticcurvelist)
2174                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2175 # endif /* OPENSSL_NO_EC */
2176         if (a->alpn_client_proto_list != NULL)
2177                 OPENSSL_free(a->alpn_client_proto_list);
2178 #endif
2179
2180         OPENSSL_free(a);
2181         }
2182
2183 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2184         {
2185         ctx->default_passwd_callback=cb;
2186         }
2187
2188 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2189         {
2190         ctx->default_passwd_callback_userdata=u;
2191         }
2192
2193 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2194         {
2195         ctx->app_verify_callback=cb;
2196         ctx->app_verify_arg=arg;
2197         }
2198
2199 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2200         {
2201         ctx->verify_mode=mode;
2202         ctx->default_verify_callback=cb;
2203         }
2204
2205 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2206         {
2207         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2208         }
2209
2210 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2211         {
2212         ssl_cert_set_cert_cb(c->cert, cb, arg);
2213         }
2214
2215 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2216         {
2217         ssl_cert_set_cert_cb(s->cert, cb, arg);
2218         }
2219
2220 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2221         {
2222         CERT_PKEY *cpk;
2223         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2224         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2225         int rsa_tmp_export,dh_tmp_export,kl;
2226         unsigned long mask_k,mask_a,emask_k,emask_a;
2227 #ifndef OPENSSL_NO_ECDSA
2228         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2229 #endif
2230 #ifndef OPENSSL_NO_ECDH
2231         int have_ecdh_tmp, ecdh_ok;
2232 #endif
2233 #ifndef OPENSSL_NO_EC
2234         X509 *x = NULL;
2235         EVP_PKEY *ecc_pkey = NULL;
2236         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2237 #endif
2238         if (c == NULL) return;
2239
2240         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2241
2242 #ifndef OPENSSL_NO_RSA
2243         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2244         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2245                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2246 #else
2247         rsa_tmp=rsa_tmp_export=0;
2248 #endif
2249 #ifndef OPENSSL_NO_DH
2250         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
2251         dh_tmp_export= !c->dh_tmp_auto && (c->dh_tmp_cb != NULL ||
2252                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2253 #else
2254         dh_tmp=dh_tmp_export=0;
2255 #endif
2256
2257 #ifndef OPENSSL_NO_ECDH
2258         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2259 #endif
2260         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2261         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2262         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2263         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2264         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2265         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2266         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2267         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2268         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2269         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2270         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2271 /* FIX THIS EAY EAY EAY */
2272         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2273         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2274         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2275 #ifndef OPENSSL_NO_EC
2276         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2277 #endif
2278         mask_k=0;
2279         mask_a=0;
2280         emask_k=0;
2281         emask_a=0;
2282
2283
2284
2285 #ifdef CIPHER_DEBUG
2286         fprintf(stderr,"rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2287                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2288                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2289 #endif
2290
2291         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2292         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2293                 mask_k |= SSL_kGOST;
2294                 mask_a |= SSL_aGOST01;
2295         }
2296         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2297         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2298                 mask_k |= SSL_kGOST;
2299                 mask_a |= SSL_aGOST94;
2300         }
2301
2302         if (rsa_enc || (rsa_tmp && rsa_sign))
2303                 mask_k|=SSL_kRSA;
2304         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2305                 emask_k|=SSL_kRSA;
2306
2307 #if 0
2308         /* The match needs to be both kDHE and aRSA or aDSA, so don't worry */
2309         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2310                 (rsa_enc || rsa_sign || dsa_sign))
2311                 mask_k|=SSL_kDHE;
2312         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2313                 (rsa_enc || rsa_sign || dsa_sign))
2314                 emask_k|=SSL_kDHE;
2315 #endif
2316
2317         if (dh_tmp_export)
2318                 emask_k|=SSL_kDHE;
2319
2320         if (dh_tmp)
2321                 mask_k|=SSL_kDHE;
2322
2323         if (dh_rsa) mask_k|=SSL_kDHr;
2324         if (dh_rsa_export) emask_k|=SSL_kDHr;
2325
2326         if (dh_dsa) mask_k|=SSL_kDHd;
2327         if (dh_dsa_export) emask_k|=SSL_kDHd;
2328
2329         if (emask_k & (SSL_kDHr|SSL_kDHd))
2330                 mask_a |= SSL_aDH;
2331
2332         if (rsa_enc || rsa_sign)
2333                 {
2334                 mask_a|=SSL_aRSA;
2335                 emask_a|=SSL_aRSA;
2336                 }
2337
2338         if (dsa_sign)
2339                 {
2340                 mask_a|=SSL_aDSS;
2341                 emask_a|=SSL_aDSS;
2342                 }
2343
2344         mask_a|=SSL_aNULL;
2345         emask_a|=SSL_aNULL;
2346
2347 #ifndef OPENSSL_NO_KRB5
2348         mask_k|=SSL_kKRB5;
2349         mask_a|=SSL_aKRB5;
2350         emask_k|=SSL_kKRB5;
2351         emask_a|=SSL_aKRB5;
2352 #endif
2353
2354         /* An ECC certificate may be usable for ECDH and/or
2355          * ECDSA cipher suites depending on the key usage extension.
2356          */
2357 #ifndef OPENSSL_NO_EC
2358         if (have_ecc_cert)
2359                 {
2360                 cpk = &c->pkeys[SSL_PKEY_ECC];
2361                 x = cpk->x509;
2362                 /* This call populates extension flags (ex_flags) */
2363                 X509_check_purpose(x, -1, 0);
2364 #ifndef OPENSSL_NO_ECDH
2365                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2366                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2367 #endif
2368                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2369                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2370                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2371                         ecdsa_ok = 0;
2372                 ecc_pkey = X509_get_pubkey(x);
2373                 ecc_pkey_size = (ecc_pkey != NULL) ?
2374                     EVP_PKEY_bits(ecc_pkey) : 0;
2375                 EVP_PKEY_free(ecc_pkey);
2376                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2377                         {
2378                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2379                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2380                         }
2381 #ifndef OPENSSL_NO_ECDH
2382                 if (ecdh_ok)
2383                         {
2384
2385                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2386                                 {
2387                                 mask_k|=SSL_kECDHr;
2388                                 mask_a|=SSL_aECDH;
2389                                 if (ecc_pkey_size <= 163)
2390                                         {
2391                                         emask_k|=SSL_kECDHr;
2392                                         emask_a|=SSL_aECDH;
2393                                         }
2394                                 }
2395
2396                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2397                                 {
2398                                 mask_k|=SSL_kECDHe;
2399                                 mask_a|=SSL_aECDH;
2400                                 if (ecc_pkey_size <= 163)
2401                                         {
2402                                         emask_k|=SSL_kECDHe;
2403                                         emask_a|=SSL_aECDH;
2404                                         }
2405                                 }
2406                         }
2407 #endif
2408 #ifndef OPENSSL_NO_ECDSA
2409                 if (ecdsa_ok)
2410                         {
2411                         mask_a|=SSL_aECDSA;
2412                         emask_a|=SSL_aECDSA;
2413                         }
2414 #endif
2415                 }
2416 #endif
2417
2418 #ifndef OPENSSL_NO_ECDH
2419         if (have_ecdh_tmp)
2420                 {
2421                 mask_k|=SSL_kECDHE;
2422                 emask_k|=SSL_kECDHE;
2423                 }
2424 #endif
2425
2426 #ifndef OPENSSL_NO_PSK
2427         mask_k |= SSL_kPSK;
2428         mask_a |= SSL_aPSK;
2429         emask_k |= SSL_kPSK;
2430         emask_a |= SSL_aPSK;
2431 #endif
2432
2433         c->mask_k=mask_k;
2434         c->mask_a=mask_a;
2435         c->export_mask_k=emask_k;
2436         c->export_mask_a=emask_a;
2437         c->valid=1;
2438         }
2439
2440 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2441 #define ku_reject(x, usage) \
2442         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2443
2444 #ifndef OPENSSL_NO_EC
2445
2446 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2447         {
2448         unsigned long alg_k, alg_a;
2449         EVP_PKEY *pkey = NULL;
2450         int keysize = 0;
2451         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2452         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2453
2454         alg_k = cs->algorithm_mkey;
2455         alg_a = cs->algorithm_auth;
2456
2457         if (SSL_C_IS_EXPORT(cs))
2458                 {
2459                 /* ECDH key length in export ciphers must be <= 163 bits */
2460                 pkey = X509_get_pubkey(x);
2461                 if (pkey == NULL) return 0;
2462                 keysize = EVP_PKEY_bits(pkey);
2463                 EVP_PKEY_free(pkey);
2464                 if (keysize > 163) return 0;
2465                 }
2466
2467         /* This call populates the ex_flags field correctly */
2468         X509_check_purpose(x, -1, 0);
2469         if ((x->sig_alg) && (x->sig_alg->algorithm))
2470                 {
2471                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2472                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2473                 }
2474         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2475                 {
2476                 /* key usage, if present, must allow key agreement */
2477                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2478                         {
2479                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2480                         return 0;
2481                         }
2482                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2483                         {
2484                         /* signature alg must be ECDSA */
2485                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2486                                 {
2487                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2488                                 return 0;
2489                                 }
2490                         }
2491                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2492                         {
2493                         /* signature alg must be RSA */
2494
2495                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2496                                 {
2497                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2498                                 return 0;
2499                                 }
2500                         }
2501                 }
2502         if (alg_a & SSL_aECDSA)
2503                 {
2504                 /* key usage, if present, must allow signing */
2505                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2506                         {
2507                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2508                         return 0;
2509                         }
2510                 }
2511
2512         return 1;  /* all checks are ok */
2513         }
2514
2515 #endif
2516
2517 static int ssl_get_server_cert_index(const SSL *s)
2518         {
2519         int idx;
2520         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2521         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2522                 idx = SSL_PKEY_RSA_SIGN;
2523         if (idx == -1)
2524                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2525         return idx;
2526         }
2527
2528 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2529         {
2530         CERT *c;
2531         int i;
2532
2533         c = s->cert;
2534         if (!s->s3 || !s->s3->tmp.new_cipher)
2535                 return NULL;
2536         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2537
2538 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2539         /* Broken protocol test: return last used certificate: which may
2540          * mismatch the one expected.
2541          */
2542         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2543                 return c->key;
2544 #endif
2545
2546         i = ssl_get_server_cert_index(s);
2547
2548         /* This may or may not be an error. */
2549         if (i < 0)
2550                 return NULL;
2551
2552         /* May be NULL. */
2553         return &c->pkeys[i];
2554         }
2555
2556 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2557         {
2558         unsigned long alg_a;
2559         CERT *c;
2560         int idx = -1;
2561
2562         alg_a = cipher->algorithm_auth;
2563         c=s->cert;
2564
2565 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2566         /* Broken protocol test: use last key: which may
2567          * mismatch the one expected.
2568          */
2569         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2570                 idx = c->key - c->pkeys;
2571         else
2572 #endif
2573
2574         if ((alg_a & SSL_aDSS) &&
2575                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2576                 idx = SSL_PKEY_DSA_SIGN;
2577         else if (alg_a & SSL_aRSA)
2578                 {
2579                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2580                         idx = SSL_PKEY_RSA_SIGN;
2581                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2582                         idx = SSL_PKEY_RSA_ENC;
2583                 }
2584         else if ((alg_a & SSL_aECDSA) &&
2585                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2586                 idx = SSL_PKEY_ECC;
2587         if (idx == -1)
2588                 {
2589                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2590                 return(NULL);
2591                 }
2592         if (pmd)
2593                 *pmd = c->pkeys[idx].digest;
2594         return c->pkeys[idx].privatekey;
2595         }
2596
2597 #ifndef OPENSSL_NO_TLSEXT
2598 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2599                                    size_t *serverinfo_length)
2600         {
2601         CERT *c = NULL;
2602         int i = 0;
2603         *serverinfo_length = 0;
2604
2605         c = s->cert;
2606         i = ssl_get_server_cert_index(s);
2607
2608         if (i == -1)
2609                 return 0;
2610         if (c->pkeys[i].serverinfo == NULL)
2611                 return 0;
2612
2613         *serverinfo = c->pkeys[i].serverinfo;
2614         *serverinfo_length = c->pkeys[i].serverinfo_length;
2615         return 1;
2616         }
2617 #endif
2618
2619 void ssl_update_cache(SSL *s,int mode)
2620         {
2621         int i;
2622
2623         /* If the session_id_length is 0, we are not supposed to cache it,
2624          * and it would be rather hard to do anyway :-) */
2625         if (s->session->session_id_length == 0) return;
2626
2627         i=s->session_ctx->session_cache_mode;
2628         if ((i & mode) && (!s->hit)
2629                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2630                     || SSL_CTX_add_session(s->session_ctx,s->session))
2631                 && (s->session_ctx->new_session_cb != NULL))
2632                 {
2633                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2634                 if (!s->session_ctx->new_session_cb(s,s->session))
2635                         SSL_SESSION_free(s->session);
2636                 }
2637
2638         /* auto flush every 255 connections */
2639         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2640                 ((i & mode) == mode))
2641                 {
2642                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2643                         ?s->session_ctx->stats.sess_connect_good
2644                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2645                         {
2646                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2647                         }
2648                 }
2649         }
2650
2651 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2652         {
2653         return ctx->method;
2654         }
2655
2656 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2657         {
2658         return(s->method);
2659         }
2660
2661 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2662         {
2663         int conn= -1;
2664         int ret=1;
2665
2666         if (s->method != meth)
2667                 {
2668                 if (s->handshake_func != NULL)
2669                         conn=(s->handshake_func == s->method->ssl_connect);
2670
2671                 if (s->method->version == meth->version)
2672                         s->method=meth;
2673                 else
2674                         {
2675                         s->method->ssl_free(s);
2676                         s->method=meth;
2677                         ret=s->method->ssl_new(s);
2678                         }
2679
2680                 if (conn == 1)
2681                         s->handshake_func=meth->ssl_connect;
2682                 else if (conn == 0)
2683                         s->handshake_func=meth->ssl_accept;
2684                 }
2685         return(ret);
2686         }
2687
2688 int SSL_get_error(const SSL *s,int i)
2689         {
2690         int reason;
2691         unsigned long l;
2692         BIO *bio;
2693
2694         if (i > 0) return(SSL_ERROR_NONE);
2695
2696         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2697          * etc, where we do encode the error */
2698         if ((l=ERR_peek_error()) != 0)
2699                 {
2700                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2701                         return(SSL_ERROR_SYSCALL);
2702                 else
2703                         return(SSL_ERROR_SSL);
2704                 }
2705
2706         if ((i < 0) && SSL_want_read(s))
2707                 {
2708                 bio=SSL_get_rbio(s);
2709                 if (BIO_should_read(bio))
2710                         return(SSL_ERROR_WANT_READ);
2711                 else if (BIO_should_write(bio))
2712                         /* This one doesn't make too much sense ... We never try
2713                          * to write to the rbio, and an application program where
2714                          * rbio and wbio are separate couldn't even know what it
2715                          * should wait for.
2716                          * However if we ever set s->rwstate incorrectly
2717                          * (so that we have SSL_want_read(s) instead of
2718                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2719                          * this test works around that bug; so it might be safer
2720                          * to keep it. */
2721                         return(SSL_ERROR_WANT_WRITE);
2722                 else if (BIO_should_io_special(bio))
2723                         {
2724                         reason=BIO_get_retry_reason(bio);
2725                         if (reason == BIO_RR_CONNECT)
2726                                 return(SSL_ERROR_WANT_CONNECT);
2727                         else if (reason == BIO_RR_ACCEPT)
2728                                 return(SSL_ERROR_WANT_ACCEPT);
2729                         else
2730                                 return(SSL_ERROR_SYSCALL); /* unknown */
2731                         }
2732                 }
2733
2734         if ((i < 0) && SSL_want_write(s))
2735                 {
2736                 bio=SSL_get_wbio(s);
2737                 if (BIO_should_write(bio))
2738                         return(SSL_ERROR_WANT_WRITE);
2739                 else if (BIO_should_read(bio))
2740                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2741                         return(SSL_ERROR_WANT_READ);
2742                 else if (BIO_should_io_special(bio))
2743                         {
2744                         reason=BIO_get_retry_reason(bio);
2745                         if (reason == BIO_RR_CONNECT)
2746                                 return(SSL_ERROR_WANT_CONNECT);
2747                         else if (reason == BIO_RR_ACCEPT)
2748                                 return(SSL_ERROR_WANT_ACCEPT);
2749                         else
2750                                 return(SSL_ERROR_SYSCALL);
2751                         }
2752                 }
2753         if ((i < 0) && SSL_want_x509_lookup(s))
2754                 {
2755                 return(SSL_ERROR_WANT_X509_LOOKUP);
2756                 }
2757
2758         if (i == 0)
2759                 {
2760                 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2761                         (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2762                         return(SSL_ERROR_ZERO_RETURN);
2763                 }
2764         return(SSL_ERROR_SYSCALL);
2765         }
2766
2767 int SSL_do_handshake(SSL *s)
2768         {
2769         int ret=1;
2770
2771         if (s->handshake_func == NULL)
2772                 {
2773                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2774                 return(-1);
2775                 }
2776
2777         s->method->ssl_renegotiate_check(s);
2778
2779         if (SSL_in_init(s) || SSL_in_before(s))
2780                 {
2781                 ret=s->handshake_func(s);
2782                 }
2783         return(ret);
2784         }
2785
2786 /* For the next 2 functions, SSL_clear() sets shutdown and so
2787  * one of these calls will reset it */
2788 void SSL_set_accept_state(SSL *s)
2789         {
2790         s->server=1;
2791         s->shutdown=0;
2792         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2793         s->handshake_func=s->method->ssl_accept;
2794         /* clear the current cipher */
2795         ssl_clear_cipher_ctx(s);
2796         ssl_clear_hash_ctx(&s->read_hash);
2797         ssl_clear_hash_ctx(&s->write_hash);
2798         }
2799
2800 void SSL_set_connect_state(SSL *s)
2801         {
2802         s->server=0;
2803         s->shutdown=0;
2804         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2805         s->handshake_func=s->method->ssl_connect;
2806         /* clear the current cipher */
2807         ssl_clear_cipher_ctx(s);
2808         ssl_clear_hash_ctx(&s->read_hash);
2809         ssl_clear_hash_ctx(&s->write_hash);
2810         }
2811
2812 int ssl_undefined_function(SSL *s)
2813         {
2814         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2815         return(0);
2816         }
2817
2818 int ssl_undefined_void_function(void)
2819         {
2820         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2821         return(0);
2822         }
2823
2824 int ssl_undefined_const_function(const SSL *s)
2825         {
2826         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2827         return(0);
2828         }
2829
2830 SSL_METHOD *ssl_bad_method(int ver)
2831         {
2832         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2833         return(NULL);
2834         }
2835
2836 const char *SSL_get_version(const SSL *s)
2837         {
2838         if (s->version == TLS1_2_VERSION)
2839                 return("TLSv1.2");
2840         else if (s->version == TLS1_1_VERSION)
2841                 return("TLSv1.1");
2842         else if (s->version == TLS1_VERSION)
2843                 return("TLSv1");
2844         else if (s->version == SSL3_VERSION)
2845                 return("SSLv3");
2846         else
2847                 return("unknown");
2848         }
2849
2850 SSL *SSL_dup(SSL *s)
2851         {
2852         STACK_OF(X509_NAME) *sk;
2853         X509_NAME *xn;
2854         SSL *ret;
2855         int i;
2856
2857         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2858             return(NULL);
2859
2860         ret->version = s->version;
2861         ret->type = s->type;
2862         ret->method = s->method;
2863
2864         if (s->session != NULL)
2865                 {
2866                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2867                 SSL_copy_session_id(ret,s);
2868                 }
2869         else
2870                 {
2871                 /* No session has been established yet, so we have to expect
2872                  * that s->cert or ret->cert will be changed later --
2873                  * they should not both point to the same object,
2874                  * and thus we can't use SSL_copy_session_id. */
2875
2876                 ret->method->ssl_free(ret);
2877                 ret->method = s->method;
2878                 ret->method->ssl_new(ret);
2879
2880                 if (s->cert != NULL)
2881                         {
2882                         if (ret->cert != NULL)
2883                                 {
2884                                 ssl_cert_free(ret->cert);
2885                                 }
2886                         ret->cert = ssl_cert_dup(s->cert);
2887                         if (ret->cert == NULL)
2888                                 goto err;
2889                         }
2890
2891                 SSL_set_session_id_context(ret,
2892                         s->sid_ctx, s->sid_ctx_length);
2893                 }
2894
2895         ret->options=s->options;
2896         ret->mode=s->mode;
2897         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2898         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2899         ret->msg_callback = s->msg_callback;
2900         ret->msg_callback_arg = s->msg_callback_arg;
2901         SSL_set_verify(ret,SSL_get_verify_mode(s),
2902                 SSL_get_verify_callback(s));
2903         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2904         ret->generate_session_id = s->generate_session_id;
2905
2906         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2907
2908         ret->debug=s->debug;
2909
2910         /* copy app data, a little dangerous perhaps */
2911         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2912                 goto err;
2913
2914         /* setup rbio, and wbio */
2915         if (s->rbio != NULL)
2916                 {
2917                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2918                         goto err;
2919                 }
2920         if (s->wbio != NULL)
2921                 {
2922                 if (s->wbio != s->rbio)
2923                         {
2924                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2925                                 goto err;
2926                         }
2927                 else
2928                         ret->wbio=ret->rbio;
2929                 }
2930         ret->rwstate = s->rwstate;
2931         ret->in_handshake = s->in_handshake;
2932         ret->handshake_func = s->handshake_func;
2933         ret->server = s->server;
2934         ret->renegotiate = s->renegotiate;
2935         ret->new_session = s->new_session;
2936         ret->quiet_shutdown = s->quiet_shutdown;
2937         ret->shutdown=s->shutdown;
2938         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2939         ret->rstate=s->rstate;
2940         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2941         ret->hit=s->hit;
2942
2943         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2944
2945         /* dup the cipher_list and cipher_list_by_id stacks */
2946         if (s->cipher_list != NULL)
2947                 {
2948                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2949                         goto err;
2950                 }
2951         if (s->cipher_list_by_id != NULL)
2952                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2953                         == NULL)
2954                         goto err;
2955
2956         /* Dup the client_CA list */
2957         if (s->client_CA != NULL)
2958                 {
2959                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2960                 ret->client_CA=sk;
2961                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2962                         {
2963                         xn=sk_X509_NAME_value(sk,i);
2964                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2965                                 {
2966                                 X509_NAME_free(xn);
2967                                 goto err;
2968                                 }
2969                         }
2970                 }
2971
2972         if (0)
2973                 {
2974 err:
2975                 if (ret != NULL) SSL_free(ret);
2976                 ret=NULL;
2977                 }
2978         return(ret);
2979         }
2980
2981 void ssl_clear_cipher_ctx(SSL *s)
2982         {
2983         if (s->enc_read_ctx != NULL)
2984                 {
2985                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2986                 OPENSSL_free(s->enc_read_ctx);
2987                 s->enc_read_ctx=NULL;
2988                 }
2989         if (s->enc_write_ctx != NULL)
2990                 {
2991                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2992                 OPENSSL_free(s->enc_write_ctx);
2993                 s->enc_write_ctx=NULL;
2994                 }
2995 #ifndef OPENSSL_NO_COMP
2996         if (s->expand != NULL)
2997                 {
2998                 COMP_CTX_free(s->expand);
2999                 s->expand=NULL;
3000                 }
3001         if (s->compress != NULL)
3002                 {
3003                 COMP_CTX_free(s->compress);
3004                 s->compress=NULL;
3005                 }
3006 #endif
3007         }
3008
3009 X509 *SSL_get_certificate(const SSL *s)
3010         {
3011         if (s->cert != NULL)
3012                 return(s->cert->key->x509);
3013         else
3014                 return(NULL);
3015         }
3016
3017 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3018         {
3019         if (s->cert != NULL)
3020                 return(s->cert->key->privatekey);
3021         else
3022                 return(NULL);
3023         }
3024
3025 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3026         {
3027         if (ctx->cert != NULL)
3028                 return ctx->cert->key->x509;
3029         else
3030                 return NULL;
3031         }
3032
3033 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3034         {
3035         if (ctx->cert != NULL)
3036                 return ctx->cert->key->privatekey;
3037         else
3038                 return NULL ;
3039         }
3040
3041 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3042         {
3043         if ((s->session != NULL) && (s->session->cipher != NULL))
3044                 return(s->session->cipher);
3045         return(NULL);
3046         }
3047 #ifdef OPENSSL_NO_COMP
3048 const void *SSL_get_current_compression(SSL *s)
3049         {
3050         return NULL;
3051         }
3052 const void *SSL_get_current_expansion(SSL *s)
3053         {
3054         return NULL;
3055         }
3056 #else
3057
3058 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3059         {
3060         if (s->compress != NULL)
3061                 return(s->compress->meth);
3062         return(NULL);
3063         }
3064
3065 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3066         {
3067         if (s->expand != NULL)
3068                 return(s->expand->meth);
3069         return(NULL);
3070         }
3071 #endif
3072
3073 int ssl_init_wbio_buffer(SSL *s,int push)
3074         {
3075         BIO *bbio;
3076
3077         if (s->bbio == NULL)
3078                 {
3079                 bbio=BIO_new(BIO_f_buffer());
3080                 if (bbio == NULL) return(0);
3081                 s->bbio=bbio;
3082                 }
3083         else
3084                 {
3085                 bbio=s->bbio;
3086                 if (s->bbio == s->wbio)
3087                         s->wbio=BIO_pop(s->wbio);
3088                 }
3089         (void)BIO_reset(bbio);
3090 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3091         if (!BIO_set_read_buffer_size(bbio,1))
3092                 {
3093                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3094                 return(0);
3095                 }
3096         if (push)
3097                 {
3098                 if (s->wbio != bbio)
3099                         s->wbio=BIO_push(bbio,s->wbio);
3100                 }
3101         else
3102                 {
3103                 if (s->wbio == bbio)
3104                         s->wbio=BIO_pop(bbio);
3105                 }
3106         return(1);
3107         }
3108
3109 void ssl_free_wbio_buffer(SSL *s)
3110         {
3111         if (s->bbio == NULL) return;
3112
3113         if (s->bbio == s->wbio)
3114                 {
3115                 /* remove buffering */
3116                 s->wbio=BIO_pop(s->wbio);
3117 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3118                 assert(s->wbio != NULL);
3119 #endif
3120         }
3121         BIO_free(s->bbio);
3122         s->bbio=NULL;
3123         }
3124
3125 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3126         {
3127         ctx->quiet_shutdown=mode;
3128         }
3129
3130 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3131         {
3132         return(ctx->quiet_shutdown);
3133         }
3134
3135 void SSL_set_quiet_shutdown(SSL *s,int mode)
3136         {
3137         s->quiet_shutdown=mode;
3138         }
3139
3140 int SSL_get_quiet_shutdown(const SSL *s)
3141         {
3142         return(s->quiet_shutdown);
3143         }
3144
3145 void SSL_set_shutdown(SSL *s,int mode)
3146         {
3147         s->shutdown=mode;
3148         }
3149
3150 int SSL_get_shutdown(const SSL *s)
3151         {
3152         return(s->shutdown);
3153         }
3154
3155 int SSL_version(const SSL *s)
3156         {
3157         return(s->version);
3158         }
3159
3160 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3161         {
3162         return(ssl->ctx);
3163         }
3164
3165 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3166         {
3167         CERT *ocert = ssl->cert;
3168         if (ssl->ctx == ctx)
3169                 return ssl->ctx;
3170 #ifndef OPENSSL_NO_TLSEXT
3171         if (ctx == NULL)
3172                 ctx = ssl->initial_ctx;
3173 #endif
3174         ssl->cert = ssl_cert_dup(ctx->cert);
3175         if (ocert)
3176                 {
3177                 /* Preserve any already negotiated parameters */
3178                 if (ssl->server)
3179                         {
3180                         ssl->cert->peer_sigalgs = ocert->peer_sigalgs;
3181                         ssl->cert->peer_sigalgslen = ocert->peer_sigalgslen;
3182                         ocert->peer_sigalgs = NULL;
3183                         ssl->cert->ciphers_raw = ocert->ciphers_raw;
3184                         ssl->cert->ciphers_rawlen = ocert->ciphers_rawlen;
3185                         ocert->ciphers_raw = NULL;
3186                         }
3187                 ssl_cert_free(ocert);
3188                 }
3189         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3190         if (ssl->ctx != NULL)
3191                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3192         ssl->ctx = ctx;
3193         return(ssl->ctx);
3194         }
3195
3196 #ifndef OPENSSL_NO_STDIO
3197 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3198         {
3199         return(X509_STORE_set_default_paths(ctx->cert_store));
3200         }
3201
3202 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3203                 const char *CApath)
3204         {
3205         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3206         }
3207 #endif
3208
3209 void SSL_set_info_callback(SSL *ssl,
3210         void (*cb)(const SSL *ssl,int type,int val))
3211         {
3212         ssl->info_callback=cb;
3213         }
3214
3215 /* One compiler (Diab DCC) doesn't like argument names in returned
3216    function pointer.  */
3217 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3218         {
3219         return ssl->info_callback;
3220         }
3221
3222 int SSL_state(const SSL *ssl)
3223         {
3224         return(ssl->state);
3225         }
3226
3227 void SSL_set_state(SSL *ssl, int state)
3228         {
3229         ssl->state = state;
3230         }
3231
3232 void SSL_set_verify_result(SSL *ssl,long arg)
3233         {
3234         ssl->verify_result=arg;
3235         }
3236
3237 long SSL_get_verify_result(const SSL *ssl)
3238         {
3239         return(ssl->verify_result);
3240         }
3241
3242 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3243                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3244         {
3245         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3246                                 new_func, dup_func, free_func);
3247         }
3248
3249 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3250         {
3251         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3252         }
3253
3254 void *SSL_get_ex_data(const SSL *s,int idx)
3255         {
3256         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3257         }
3258
3259 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3260                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3261         {
3262         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3263                                 new_func, dup_func, free_func);
3264         }
3265
3266 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3267         {
3268         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3269         }
3270
3271 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3272         {
3273         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3274         }
3275
3276 int ssl_ok(SSL *s)
3277         {
3278         return(1);
3279         }
3280
3281 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3282         {
3283         return(ctx->cert_store);
3284         }
3285
3286 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3287         {
3288         if (ctx->cert_store != NULL)
3289                 X509_STORE_free(ctx->cert_store);
3290         ctx->cert_store=store;
3291         }
3292
3293 int SSL_want(const SSL *s)
3294         {
3295         return(s->rwstate);
3296         }
3297
3298 /*!
3299  * \brief Set the callback for generating temporary RSA keys.
3300  * \param ctx the SSL context.
3301  * \param cb the callback
3302  */
3303
3304 #ifndef OPENSSL_NO_RSA
3305 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3306                                                           int is_export,
3307                                                           int keylength))
3308     {
3309     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3310     }
3311
3312 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3313                                                   int is_export,
3314                                                   int keylength))
3315     {
3316     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3317     }
3318 #endif
3319
3320 #ifdef DOXYGEN
3321 /*!
3322  * \brief The RSA temporary key callback function.
3323  * \param ssl the SSL session.
3324  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3325  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3326  * of the required key in bits.
3327  * \return the temporary RSA key.
3328  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3329  */
3330
3331 RSA *cb(SSL *ssl,int is_export,int keylength)
3332     {}
3333 #endif
3334
3335 /*!
3336  * \brief Set the callback for generating temporary DH keys.
3337  * \param ctx the SSL context.
3338  * \param dh the callback
3339  */
3340
3341 #ifndef OPENSSL_NO_DH
3342 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3343                                                         int keylength))
3344         {
3345         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3346         }
3347
3348 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3349                                                 int keylength))
3350         {
3351         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3352         }
3353 #endif
3354
3355 #ifndef OPENSSL_NO_ECDH
3356 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3357                                                                 int keylength))
3358         {
3359         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3360         }
3361
3362 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3363                                                         int keylength))
3364         {
3365         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3366         }
3367 #endif
3368
3369 #ifndef OPENSSL_NO_PSK
3370 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3371         {
3372         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3373                 {
3374                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3375                 return 0;
3376                 }
3377         if (ctx->psk_identity_hint != NULL)
3378                 OPENSSL_free(ctx->psk_identity_hint);
3379         if (identity_hint != NULL)
3380                 {
3381                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3382                 if (ctx->psk_identity_hint == NULL)
3383                         return 0;
3384                 }
3385         else
3386                 ctx->psk_identity_hint = NULL;
3387         return 1;
3388         }
3389
3390 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3391         {
3392         if (s == NULL)
3393                 return 0;
3394
3395         if (s->session == NULL)
3396                 return 1; /* session not created yet, ignored */
3397
3398         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3399                 {
3400                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3401                 return 0;
3402                 }
3403         if (s->session->psk_identity_hint != NULL)
3404                 OPENSSL_free(s->session->psk_identity_hint);
3405         if (identity_hint != NULL)
3406                 {
3407                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3408                 if (s->session->psk_identity_hint == NULL)
3409                         return 0;
3410                 }
3411         else
3412                 s->session->psk_identity_hint = NULL;
3413         return 1;
3414         }
3415
3416 const char *SSL_get_psk_identity_hint(const SSL *s)
3417         {
3418         if (s == NULL || s->session == NULL)
3419                 return NULL;
3420         return(s->session->psk_identity_hint);
3421         }
3422
3423 const char *SSL_get_psk_identity(const SSL *s)
3424         {
3425         if (s == NULL || s->session == NULL)
3426                 return NULL;
3427         return(s->session->psk_identity);
3428         }
3429
3430 void SSL_set_psk_client_callback(SSL *s,
3431     unsigned int (*cb)(SSL *ssl, const char *hint,
3432                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3433                        unsigned int max_psk_len))
3434         {
3435         s->psk_client_callback = cb;
3436         }
3437
3438 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3439     unsigned int (*cb)(SSL *ssl, const char *hint,
3440                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3441                        unsigned int max_psk_len))
3442         {
3443         ctx->psk_client_callback = cb;
3444         }
3445
3446 void SSL_set_psk_server_callback(SSL *s,
3447     unsigned int (*cb)(SSL *ssl, const char *identity,
3448                        unsigned char *psk, unsigned int max_psk_len))
3449         {
3450         s->psk_server_callback = cb;
3451         }
3452
3453 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3454     unsigned int (*cb)(SSL *ssl, const char *identity,
3455                        unsigned char *psk, unsigned int max_psk_len))
3456         {
3457         ctx->psk_server_callback = cb;
3458         }
3459 #endif
3460
3461 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
3462         {
3463         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3464         }
3465 void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
3466         {
3467         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3468         }
3469
3470 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3471         int (*cb)(SSL *ssl, int is_forward_secure))
3472         {
3473         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3474                 (void (*)(void))cb);
3475         }
3476 void SSL_set_not_resumable_session_callback(SSL *ssl,
3477         int (*cb)(SSL *ssl, int is_forward_secure))
3478         {
3479         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3480                 (void (*)(void))cb);
3481         }
3482
3483 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3484  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3485  * any. If EVP_MD pointer is passed, initializes ctx with this md
3486  * Returns newly allocated ctx;
3487  */
3488
3489 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3490 {
3491         ssl_clear_hash_ctx(hash);
3492         *hash = EVP_MD_CTX_create();
3493         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3494         return *hash;
3495 }
3496 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3497 {
3498
3499         if (*hash) EVP_MD_CTX_destroy(*hash);
3500         *hash=NULL;
3501 }
3502
3503 void SSL_set_debug(SSL *s, int debug)
3504         {
3505         s->debug = debug;
3506         }
3507
3508 int SSL_cache_hit(SSL *s)
3509         {
3510         return s->hit;
3511         }
3512
3513 int SSL_is_server(SSL *s)
3514         {
3515         return s->server;
3516         }
3517
3518 void SSL_set_security_level(SSL *s, int level)
3519         {
3520         s->cert->sec_level = level;
3521         }
3522
3523 int SSL_get_security_level(const SSL *s)
3524         {
3525         return s->cert->sec_level;
3526         }
3527
3528 void SSL_set_security_callback(SSL *s, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
3529         {
3530         s->cert->sec_cb = cb;
3531         }
3532
3533 int (*SSL_get_security_callback(const SSL *s))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
3534         {
3535         return s->cert->sec_cb;
3536         }
3537
3538 void SSL_set0_security_ex_data(SSL *s, void *ex)
3539         {
3540         s->cert->sec_ex = ex;
3541         }
3542
3543 void *SSL_get0_security_ex_data(const SSL *s)
3544         {
3545         return s->cert->sec_ex;
3546         }
3547
3548 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
3549         {
3550         ctx->cert->sec_level = level;
3551         }
3552
3553 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
3554         {
3555         return ctx->cert->sec_level;
3556         }
3557
3558 void SSL_CTX_set_security_callback(SSL_CTX *ctx, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
3559         {
3560         ctx->cert->sec_cb = cb;
3561         }
3562
3563 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
3564         {
3565         return ctx->cert->sec_cb;
3566         }
3567
3568 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
3569         {
3570         ctx->cert->sec_ex = ex;
3571         }
3572
3573 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
3574         {
3575         return ctx->cert->sec_ex;
3576         }
3577
3578 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3579 #include "../crypto/bio/bss_file.c"
3580 #endif
3581
3582 IMPLEMENT_STACK_OF(SSL_CIPHER)
3583 IMPLEMENT_STACK_OF(SSL_COMP)
3584 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3585                                     ssl_cipher_id);