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 <openssl/crypto.h>
 150 #include "ssl_locl.h"
 151 #include "kssl_lcl.h"
 152 #include <openssl/objects.h>
 153 #include <openssl/lhash.h>
 154 #include <openssl/x509v3.h>
 155 #include <openssl/rand.h>
 156 #include <openssl/ocsp.h>
 157 #ifndef OPENSSL_NO_DH
 158 #include <openssl/dh.h>
 159 #endif
 160 #ifndef OPENSSL_NO_ENGINE
 161 #include <openssl/engine.h>
 162 #endif
 163
 164 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 165
 166 SSL3_ENC_METHOD ssl3_undef_enc_method={
 167         /* evil casts, but these functions are only called if there's a library bug */
 168         (int (*)(SSL *,int))ssl_undefined_function,
 169         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 170         ssl_undefined_function,
 171         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 172         (int (*)(SSL*, int))ssl_undefined_function,
 173         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 174         0,      /* finish_mac_length */
 175         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 176         NULL,   /* client_finished_label */
 177         0,      /* client_finished_label_len */
 178         NULL,   /* server_finished_label */
 179         0,      /* server_finished_label_len */
 180         (int (*)(int))ssl_undefined_function
 181         };
 182
 183 int SSL_clear(SSL *s)
 184         {
 185
 186         if (s->method == NULL)
 187                 {
 188                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 189                 return(0);
 190                 }
 191
 192         if (ssl_clear_bad_session(s))
 193                 {
 194                 SSL_SESSION_free(s->session);
 195                 s->session=NULL;
 196                 }
 197
 198         s->error=0;
 199         s->hit=0;
 200         s->shutdown=0;
 201
 202 #if 0 /* Disabled since version 1.10 of this file (early return not
 203        * needed because SSL_clear is not called when doing renegotiation) */
 204         /* This is set if we are doing dynamic renegotiation so keep
 205          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 206         if (s->renegotiate) return(1);
 207 #else
 208         if (s->renegotiate)
 209                 {
 210                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 211                 return 0;
 212                 }
 213 #endif
 214
 215         s->type=0;
 216
 217         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 218
 219         s->version=s->method->version;
 220         s->client_version=s->version;
 221         s->rwstate=SSL_NOTHING;
 222         s->rstate=SSL_ST_READ_HEADER;
 223 #if 0
 224         s->read_ahead=s->ctx->read_ahead;
 225 #endif
 226
 227         if (s->init_buf != NULL)
 228                 {
 229                 BUF_MEM_free(s->init_buf);
 230                 s->init_buf=NULL;
 231                 }
 232
 233         ssl_clear_cipher_ctx(s);
 234         ssl_clear_hash_ctx(&s->read_hash);
 235         ssl_clear_hash_ctx(&s->write_hash);
 236
 237         s->first_packet=0;
 238
 239 #if 1
 240         /* Check to see if we were changed into a different method, if
 241          * so, revert back if we are not doing session-id reuse. */
 242         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 243                 {
 244                 s->method->ssl_free(s);
 245                 s->method=s->ctx->method;
 246                 if (!s->method->ssl_new(s))
 247                         return(0);
 248                 }
 249         else
 250 #endif
 251                 s->method->ssl_clear(s);
 252         return(1);
 253         }
 254
 255 /** Used to change an SSL_CTXs default SSL method type */
 256 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 257         {
 258         STACK_OF(SSL_CIPHER) *sk;
 259
 260         ctx->method=meth;
 261
 262         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 263                 &(ctx->cipher_list_by_id),
 264                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 265         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 266                 {
 267                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 268                 return(0);
 269                 }
 270         return(1);
 271         }
 272
 273 SSL *SSL_new(SSL_CTX *ctx)
 274         {
 275         SSL *s;
 276
 277         if (ctx == NULL)
 278                 {
 279                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 280                 return(NULL);
 281                 }
 282         if (ctx->method == NULL)
 283                 {
 284                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 285                 return(NULL);
 286                 }
 287
 288         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 289         if (s == NULL) goto err;
 290         memset(s,0,sizeof(SSL));
 291
 292 #ifndef OPENSSL_NO_KRB5
 293         s->kssl_ctx = kssl_ctx_new();
 294 #endif  /* OPENSSL_NO_KRB5 */
 295
 296         s->options=ctx->options;
 297         s->mode=ctx->mode;
 298         s->max_cert_list=ctx->max_cert_list;
 299
 300         if (ctx->cert != NULL)
 301                 {
 302                 /* Earlier library versions used to copy the pointer to
 303                  * the CERT, not its contents; only when setting new
 304                  * parameters for the per-SSL copy, ssl_cert_new would be
 305                  * called (and the direct reference to the per-SSL_CTX
 306                  * settings would be lost, but those still were indirectly
 307                  * accessed for various purposes, and for that reason they
 308                  * used to be known as s->ctx->default_cert).
 309                  * Now we don't look at the SSL_CTX's CERT after having
 310                  * duplicated it once. */
 311
 312                 s->cert = ssl_cert_dup(ctx->cert);
 313                 if (s->cert == NULL)
 314                         goto err;
 315                 }
 316         else
 317                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 318
 319         s->read_ahead=ctx->read_ahead;
 320         s->msg_callback=ctx->msg_callback;
 321         s->msg_callback_arg=ctx->msg_callback_arg;
 322         s->verify_mode=ctx->verify_mode;
 323         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
 324 #if 0
 325         s->verify_depth=ctx->verify_depth;
 326 #endif
 327         s->sid_ctx_length=ctx->sid_ctx_length;
 328         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 329         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 330         s->verify_callback=ctx->default_verify_callback;
 331         s->generate_session_id=ctx->generate_session_id;
 332
 333         s->param = X509_VERIFY_PARAM_new();
 334         if (!s->param)
 335                 goto err;
 336         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 337 #if 0
 338         s->purpose = ctx->purpose;
 339         s->trust = ctx->trust;
 340 #endif
 341         s->quiet_shutdown=ctx->quiet_shutdown;
 342         s->max_send_fragment = ctx->max_send_fragment;
 343
 344         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 345         s->ctx=ctx;
 346 #ifndef OPENSSL_NO_TLSEXT
 347         s->tlsext_debug_cb = 0;
 348         s->tlsext_debug_arg = NULL;
 349         s->tlsext_ticket_expected = 0;
 350         s->tlsext_status_type = -1;
 351         s->tlsext_status_expected = 0;
 352         s->tlsext_ocsp_ids = NULL;
 353         s->tlsext_ocsp_exts = NULL;
 354         s->tlsext_ocsp_resp = NULL;
 355         s->tlsext_ocsp_resplen = -1;
 356         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 357         s->initial_ctx=ctx;
 358 # ifndef OPENSSL_NO_NEXTPROTONEG
 359         s->next_proto_negotiated = NULL;
 360 # endif
 361 #endif
 362
 363         s->verify_result=X509_V_OK;
 364
 365         s->method=ctx->method;
 366
 367         if (!s->method->ssl_new(s))
 368                 goto err;
 369
 370         s->references=1;
 371         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 372
 373         SSL_clear(s);
 374
 375         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 376
 377 #ifndef OPENSSL_NO_PSK
 378         s->psk_client_callback=ctx->psk_client_callback;
 379         s->psk_server_callback=ctx->psk_server_callback;
 380 #endif
 381
 382         return(s);
 383 err:
 384         if (s != NULL)
 385                 {
 386                 if (s->cert != NULL)
 387                         ssl_cert_free(s->cert);
 388                 if (s->ctx != NULL)
 389                         SSL_CTX_free(s->ctx); /* decrement reference count */
 390                 OPENSSL_free(s);
 391                 }
 392         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 393         return(NULL);
 394         }
 395
 396 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 397                                    unsigned int sid_ctx_len)
 398     {
 399     if(sid_ctx_len > sizeof ctx->sid_ctx)
 400         {
 401         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 402         return 0;
 403         }
 404     ctx->sid_ctx_length=sid_ctx_len;
 405     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 406
 407     return 1;
 408     }
 409
 410 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 411                                unsigned int sid_ctx_len)
 412     {
 413     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 414         {
 415         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 416         return 0;
 417         }
 418     ssl->sid_ctx_length=sid_ctx_len;
 419     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 420
 421     return 1;
 422     }
 423
 424 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 425         {
 426         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 427         ctx->generate_session_id = cb;
 428         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 429         return 1;
 430         }
 431
 432 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 433         {
 434         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 435         ssl->generate_session_id = cb;
 436         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 437         return 1;
 438         }
 439
 440 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 441                                 unsigned int id_len)
 442         {
 443         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 444          * we can "construct" a session to give us the desired check - ie. to
 445          * find if there's a session in the hash table that would conflict with
 446          * any new session built out of this id/id_len and the ssl_version in
 447          * use by this SSL. */
 448         SSL_SESSION r, *p;
 449
 450         if(id_len > sizeof r.session_id)
 451                 return 0;
 452
 453         r.ssl_version = ssl->version;
 454         r.session_id_length = id_len;
 455         memcpy(r.session_id, id, id_len);
 456         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 457          * callback is calling us to check the uniqueness of a shorter ID, it
 458          * must be compared as a padded-out ID because that is what it will be
 459          * converted to when the callback has finished choosing it. */
 460         if((r.ssl_version == SSL2_VERSION) &&
 461                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 462                 {
 463                 memset(r.session_id + id_len, 0,
 464                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 465                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 466                 }
 467
 468         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 469         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 470         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 471         return (p != NULL);
 472         }
 473
 474 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 475         {
 476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 477         }
 478
 479 int SSL_set_purpose(SSL *s, int purpose)
 480         {
 481         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 482         }
 483
 484 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 485         {
 486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 487         }
 488
 489 int SSL_set_trust(SSL *s, int trust)
 490         {
 491         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 492         }
 493
 494 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 495         {
 496         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 497         }
 498
 499 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 500         {
 501         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 502         }
 503
 504 void SSL_free(SSL *s)
 505         {
 506         int i;
 507
 508         if(s == NULL)
 509             return;
 510
 511         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 512 #ifdef REF_PRINT
 513         REF_PRINT("SSL",s);
 514 #endif
 515         if (i > 0) return;
 516 #ifdef REF_CHECK
 517         if (i < 0)
 518                 {
 519                 fprintf(stderr,"SSL_free, bad reference count\n");
 520                 abort(); /* ok */
 521                 }
 522 #endif
 523
 524         if (s->param)
 525                 X509_VERIFY_PARAM_free(s->param);
 526
 527         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 528
 529         if (s->bbio != NULL)
 530                 {
 531                 /* If the buffering BIO is in place, pop it off */
 532                 if (s->bbio == s->wbio)
 533                         {
 534                         s->wbio=BIO_pop(s->wbio);
 535                         }
 536                 BIO_free(s->bbio);
 537                 s->bbio=NULL;
 538                 }
 539         if (s->rbio != NULL)
 540                 BIO_free_all(s->rbio);
 541         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 542                 BIO_free_all(s->wbio);
 543
 544         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 545
 546         /* add extra stuff */
 547         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 548         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 549
 550         /* Make the next call work :-) */
 551         if (s->session != NULL)
 552                 {
 553                 ssl_clear_bad_session(s);
 554                 SSL_SESSION_free(s->session);
 555                 }
 556
 557         ssl_clear_cipher_ctx(s);
 558         ssl_clear_hash_ctx(&s->read_hash);
 559         ssl_clear_hash_ctx(&s->write_hash);
 560
 561         if (s->cert != NULL) ssl_cert_free(s->cert);
 562         /* Free up if allocated */
 563
 564 #ifndef OPENSSL_NO_TLSEXT
 565         if (s->tlsext_hostname)
 566                 OPENSSL_free(s->tlsext_hostname);
 567         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 568 #ifndef OPENSSL_NO_EC
 569         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 570         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 571 #endif /* OPENSSL_NO_EC */
 572         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 573         if (s->tlsext_ocsp_exts)
 574                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 575                                                 X509_EXTENSION_free);
 576         if (s->tlsext_ocsp_ids)
 577                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 578         if (s->tlsext_ocsp_resp)
 579                 OPENSSL_free(s->tlsext_ocsp_resp);
 580 #endif
 581
 582         if (s->client_CA != NULL)
 583                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 584
 585         if (s->method != NULL) s->method->ssl_free(s);
 586
 587         if (s->ctx) SSL_CTX_free(s->ctx);
 588
 589 #ifndef OPENSSL_NO_KRB5
 590         if (s->kssl_ctx != NULL)
 591                 kssl_ctx_free(s->kssl_ctx);
 592 #endif  /* OPENSSL_NO_KRB5 */
 593
 594 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 595         if (s->next_proto_negotiated)
 596                 OPENSSL_free(s->next_proto_negotiated);
 597 #endif
 598
 599         OPENSSL_free(s);
 600         }
 601
 602 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 603         {
 604         /* If the output buffering BIO is still in place, remove it
 605          */
 606         if (s->bbio != NULL)
 607                 {
 608                 if (s->wbio == s->bbio)
 609                         {
 610                         s->wbio=s->wbio->next_bio;
 611                         s->bbio->next_bio=NULL;
 612                         }
 613                 }
 614         if ((s->rbio != NULL) && (s->rbio != rbio))
 615                 BIO_free_all(s->rbio);
 616         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 617                 BIO_free_all(s->wbio);
 618         s->rbio=rbio;
 619         s->wbio=wbio;
 620         }
 621
 622 BIO *SSL_get_rbio(const SSL *s)
 623         { return(s->rbio); }
 624
 625 BIO *SSL_get_wbio(const SSL *s)
 626         { return(s->wbio); }
 627
 628 int SSL_get_fd(const SSL *s)
 629         {
 630         return(SSL_get_rfd(s));
 631         }
 632
 633 int SSL_get_rfd(const SSL *s)
 634         {
 635         int ret= -1;
 636         BIO *b,*r;
 637
 638         b=SSL_get_rbio(s);
 639         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 640         if (r != NULL)
 641                 BIO_get_fd(r,&ret);
 642         return(ret);
 643         }
 644
 645 int SSL_get_wfd(const SSL *s)
 646         {
 647         int ret= -1;
 648         BIO *b,*r;
 649
 650         b=SSL_get_wbio(s);
 651         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 652         if (r != NULL)
 653                 BIO_get_fd(r,&ret);
 654         return(ret);
 655         }
 656
 657 #ifndef OPENSSL_NO_SOCK
 658 int SSL_set_fd(SSL *s,int fd)
 659         {
 660         int ret=0;
 661         BIO *bio=NULL;
 662
 663         bio=BIO_new(BIO_s_socket());
 664
 665         if (bio == NULL)
 666                 {
 667                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 668                 goto err;
 669                 }
 670         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 671         SSL_set_bio(s,bio,bio);
 672         ret=1;
 673 err:
 674         return(ret);
 675         }
 676
 677 int SSL_set_wfd(SSL *s,int fd)
 678         {
 679         int ret=0;
 680         BIO *bio=NULL;
 681
 682         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 683                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 684                 {
 685                 bio=BIO_new(BIO_s_socket());
 686
 687                 if (bio == NULL)
 688                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 689                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 690                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 691                 }
 692         else
 693                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 694         ret=1;
 695 err:
 696         return(ret);
 697         }
 698
 699 int SSL_set_rfd(SSL *s,int fd)
 700         {
 701         int ret=0;
 702         BIO *bio=NULL;
 703
 704         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 705                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 706                 {
 707                 bio=BIO_new(BIO_s_socket());
 708
 709                 if (bio == NULL)
 710                         {
 711                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 712                         goto err;
 713                         }
 714                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 715                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 716                 }
 717         else
 718                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 719         ret=1;
 720 err:
 721         return(ret);
 722         }
 723 #endif
 724
 725
 726 /* return length of latest Finished message we sent, copy to 'buf' */
 727 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 728         {
 729         size_t ret = 0;
 730
 731         if (s->s3 != NULL)
 732                 {
 733                 ret = s->s3->tmp.finish_md_len;
 734                 if (count > ret)
 735                         count = ret;
 736                 memcpy(buf, s->s3->tmp.finish_md, count);
 737                 }
 738         return ret;
 739         }
 740
 741 /* return length of latest Finished message we expected, copy to 'buf' */
 742 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 743         {
 744         size_t ret = 0;
 745
 746         if (s->s3 != NULL)
 747                 {
 748                 ret = s->s3->tmp.peer_finish_md_len;
 749                 if (count > ret)
 750                         count = ret;
 751                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 752                 }
 753         return ret;
 754         }
 755
 756
 757 int SSL_get_verify_mode(const SSL *s)
 758         {
 759         return(s->verify_mode);
 760         }
 761
 762 int SSL_get_verify_depth(const SSL *s)
 763         {
 764         return X509_VERIFY_PARAM_get_depth(s->param);
 765         }
 766
 767 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 768         {
 769         return(s->verify_callback);
 770         }
 771
 772 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 773         {
 774         return(ctx->verify_mode);
 775         }
 776
 777 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 778         {
 779         return X509_VERIFY_PARAM_get_depth(ctx->param);
 780         }
 781
 782 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 783         {
 784         return(ctx->default_verify_callback);
 785         }
 786
 787 void SSL_set_verify(SSL *s,int mode,
 788                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 789         {
 790         s->verify_mode=mode;
 791         if (callback != NULL)
 792                 s->verify_callback=callback;
 793         }
 794
 795 void SSL_set_verify_depth(SSL *s,int depth)
 796         {
 797         X509_VERIFY_PARAM_set_depth(s->param, depth);
 798         }
 799
 800 void SSL_set_read_ahead(SSL *s,int yes)
 801         {
 802         s->read_ahead=yes;
 803         }
 804
 805 int SSL_get_read_ahead(const SSL *s)
 806         {
 807         return(s->read_ahead);
 808         }
 809
 810 int SSL_pending(const SSL *s)
 811         {
 812         /* SSL_pending cannot work properly if read-ahead is enabled
 813          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 814          * and it is impossible to fix since SSL_pending cannot report
 815          * errors that may be observed while scanning the new data.
 816          * (Note that SSL_pending() is often used as a boolean value,
 817          * so we'd better not return -1.)
 818          */
 819         return(s->method->ssl_pending(s));
 820         }
 821
 822 X509 *SSL_get_peer_certificate(const SSL *s)
 823         {
 824         X509 *r;
 825
 826         if ((s == NULL) || (s->session == NULL))
 827                 r=NULL;
 828         else
 829                 r=s->session->peer;
 830
 831         if (r == NULL) return(r);
 832
 833         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 834
 835         return(r);
 836         }
 837
 838 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 839         {
 840         STACK_OF(X509) *r;
 841
 842         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 843                 r=NULL;
 844         else
 845                 r=s->session->sess_cert->cert_chain;
 846
 847         /* If we are a client, cert_chain includes the peer's own
 848          * certificate; if we are a server, it does not. */
 849
 850         return(r);
 851         }
 852
 853 /* Now in theory, since the calling process own 't' it should be safe to
 854  * modify.  We need to be able to read f without being hassled */
 855 void SSL_copy_session_id(SSL *t,const SSL *f)
 856         {
 857         CERT *tmp;
 858
 859         /* Do we need to to SSL locking? */
 860         SSL_set_session(t,SSL_get_session(f));
 861
 862         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 863          * vice-versa */
 864         if (t->method != f->method)
 865                 {
 866                 t->method->ssl_free(t); /* cleanup current */
 867                 t->method=f->method;    /* change method */
 868                 t->method->ssl_new(t);  /* setup new */
 869                 }
 870
 871         tmp=t->cert;
 872         if (f->cert != NULL)
 873                 {
 874                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 875                 t->cert=f->cert;
 876                 }
 877         else
 878                 t->cert=NULL;
 879         if (tmp != NULL) ssl_cert_free(tmp);
 880         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 881         }
 882
 883 /* Fix this so it checks all the valid key/cert options */
 884 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 885         {
 886         if (    (ctx == NULL) ||
 887                 (ctx->cert == NULL) ||
 888                 (ctx->cert->key->x509 == NULL))
 889                 {
 890                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 891                 return(0);
 892                 }
 893         if      (ctx->cert->key->privatekey == NULL)
 894                 {
 895                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 896                 return(0);
 897                 }
 898         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 899         }
 900
 901 /* Fix this function so that it takes an optional type parameter */
 902 int SSL_check_private_key(const SSL *ssl)
 903         {
 904         if (ssl == NULL)
 905                 {
 906                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 907                 return(0);
 908                 }
 909         if (ssl->cert == NULL)
 910                 {
 911                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 912                 return 0;
 913                 }
 914         if (ssl->cert->key->x509 == NULL)
 915                 {
 916                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 917                 return(0);
 918                 }
 919         if (ssl->cert->key->privatekey == NULL)
 920                 {
 921                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 922                 return(0);
 923                 }
 924         return(X509_check_private_key(ssl->cert->key->x509,
 925                 ssl->cert->key->privatekey));
 926         }
 927
 928 int SSL_accept(SSL *s)
 929         {
 930         if (s->handshake_func == 0)
 931                 /* Not properly initialized yet */
 932                 SSL_set_accept_state(s);
 933
 934         return(s->method->ssl_accept(s));
 935         }
 936
 937 int SSL_connect(SSL *s)
 938         {
 939         if (s->handshake_func == 0)
 940                 /* Not properly initialized yet */
 941                 SSL_set_connect_state(s);
 942
 943         return(s->method->ssl_connect(s));
 944         }
 945
 946 long SSL_get_default_timeout(const SSL *s)
 947         {
 948         return(s->method->get_timeout());
 949         }
 950
 951 int SSL_read(SSL *s,void *buf,int num)
 952         {
 953         if (s->handshake_func == 0)
 954                 {
 955                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 956                 return -1;
 957                 }
 958
 959         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 960                 {
 961                 s->rwstate=SSL_NOTHING;
 962                 return(0);
 963                 }
 964         return(s->method->ssl_read(s,buf,num));
 965         }
 966
 967 int SSL_peek(SSL *s,void *buf,int num)
 968         {
 969         if (s->handshake_func == 0)
 970                 {
 971                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 972                 return -1;
 973                 }
 974
 975         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 976                 {
 977                 return(0);
 978                 }
 979         return(s->method->ssl_peek(s,buf,num));
 980         }
 981
 982 int SSL_write(SSL *s,const void *buf,int num)
 983         {
 984         if (s->handshake_func == 0)
 985                 {
 986                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 987                 return -1;
 988                 }
 989
 990         if (s->shutdown & SSL_SENT_SHUTDOWN)
 991                 {
 992                 s->rwstate=SSL_NOTHING;
 993                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 994                 return(-1);
 995                 }
 996         return(s->method->ssl_write(s,buf,num));
 997         }
 998
 999 int SSL_shutdown(SSL *s)
1000         {
1001         /* Note that this function behaves differently from what one might
1002          * expect.  Return values are 0 for no success (yet),
1003          * 1 for success; but calling it once is usually not enough,
1004          * even if blocking I/O is used (see ssl3_shutdown).
1005          */
1006
1007         if (s->handshake_func == 0)
1008                 {
1009                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1010                 return -1;
1011                 }
1012
1013         if ((s != NULL) && !SSL_in_init(s))
1014                 return(s->method->ssl_shutdown(s));
1015         else
1016                 return(1);
1017         }
1018
1019 int SSL_renegotiate(SSL *s)
1020         {
1021         if (s->renegotiate == 0)
1022                 s->renegotiate=1;
1023
1024         s->new_session=1;
1025
1026         return(s->method->ssl_renegotiate(s));
1027         }
1028
1029 int SSL_renegotiate_abbreviated(SSL *s)
1030         {
1031         if (s->renegotiate == 0)
1032                 s->renegotiate=1;
1033
1034         s->new_session=0;
1035
1036         return(s->method->ssl_renegotiate(s));
1037         }
1038
1039 int SSL_renegotiate_pending(SSL *s)
1040         {
1041         /* becomes true when negotiation is requested;
1042          * false again once a handshake has finished */
1043         return (s->renegotiate != 0);
1044         }
1045
1046 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1047         {
1048         long l;
1049
1050         switch (cmd)
1051                 {
1052         case SSL_CTRL_GET_READ_AHEAD:
1053                 return(s->read_ahead);
1054         case SSL_CTRL_SET_READ_AHEAD:
1055                 l=s->read_ahead;
1056                 s->read_ahead=larg;
1057                 return(l);
1058
1059         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1060                 s->msg_callback_arg = parg;
1061                 return 1;
1062
1063         case SSL_CTRL_OPTIONS:
1064                 return(s->options|=larg);
1065         case SSL_CTRL_CLEAR_OPTIONS:
1066                 return(s->options&=~larg);
1067         case SSL_CTRL_MODE:
1068                 return(s->mode|=larg);
1069         case SSL_CTRL_CLEAR_MODE:
1070                 return(s->mode &=~larg);
1071         case SSL_CTRL_GET_MAX_CERT_LIST:
1072                 return(s->max_cert_list);
1073         case SSL_CTRL_SET_MAX_CERT_LIST:
1074                 l=s->max_cert_list;
1075                 s->max_cert_list=larg;
1076                 return(l);
1077         case SSL_CTRL_SET_MTU:
1078                 if (larg < (long)dtls1_min_mtu())
1079                         return 0;
1080
1081                 if (SSL_version(s) == DTLS1_VERSION ||
1082                     SSL_version(s) == DTLS1_BAD_VER)
1083                         {
1084                         s->d1->mtu = larg;
1085                         return larg;
1086                         }
1087                 return 0;
1088         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1089                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1090                         return 0;
1091                 s->max_send_fragment = larg;
1092                 return 1;
1093         case SSL_CTRL_GET_RI_SUPPORT:
1094                 if (s->s3)
1095                         return s->s3->send_connection_binding;
1096                 else return 0;
1097         default:
1098                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1099                 }
1100         }
1101
1102 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1103         {
1104         switch(cmd)
1105                 {
1106         case SSL_CTRL_SET_MSG_CALLBACK:
1107                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1108                 return 1;
1109
1110         default:
1111                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1112                 }
1113         }
1114
1115 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1116         {
1117         return ctx->sessions;
1118         }
1119
1120 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1121         {
1122         long l;
1123
1124         switch (cmd)
1125                 {
1126         case SSL_CTRL_GET_READ_AHEAD:
1127                 return(ctx->read_ahead);
1128         case SSL_CTRL_SET_READ_AHEAD:
1129                 l=ctx->read_ahead;
1130                 ctx->read_ahead=larg;
1131                 return(l);
1132
1133         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1134                 ctx->msg_callback_arg = parg;
1135                 return 1;
1136
1137         case SSL_CTRL_GET_MAX_CERT_LIST:
1138                 return(ctx->max_cert_list);
1139         case SSL_CTRL_SET_MAX_CERT_LIST:
1140                 l=ctx->max_cert_list;
1141                 ctx->max_cert_list=larg;
1142                 return(l);
1143
1144         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1145                 l=ctx->session_cache_size;
1146                 ctx->session_cache_size=larg;
1147                 return(l);
1148         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1149                 return(ctx->session_cache_size);
1150         case SSL_CTRL_SET_SESS_CACHE_MODE:
1151                 l=ctx->session_cache_mode;
1152                 ctx->session_cache_mode=larg;
1153                 return(l);
1154         case SSL_CTRL_GET_SESS_CACHE_MODE:
1155                 return(ctx->session_cache_mode);
1156
1157         case SSL_CTRL_SESS_NUMBER:
1158                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1159         case SSL_CTRL_SESS_CONNECT:
1160                 return(ctx->stats.sess_connect);
1161         case SSL_CTRL_SESS_CONNECT_GOOD:
1162                 return(ctx->stats.sess_connect_good);
1163         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1164                 return(ctx->stats.sess_connect_renegotiate);
1165         case SSL_CTRL_SESS_ACCEPT:
1166                 return(ctx->stats.sess_accept);
1167         case SSL_CTRL_SESS_ACCEPT_GOOD:
1168                 return(ctx->stats.sess_accept_good);
1169         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1170                 return(ctx->stats.sess_accept_renegotiate);
1171         case SSL_CTRL_SESS_HIT:
1172                 return(ctx->stats.sess_hit);
1173         case SSL_CTRL_SESS_CB_HIT:
1174                 return(ctx->stats.sess_cb_hit);
1175         case SSL_CTRL_SESS_MISSES:
1176                 return(ctx->stats.sess_miss);
1177         case SSL_CTRL_SESS_TIMEOUTS:
1178                 return(ctx->stats.sess_timeout);
1179         case SSL_CTRL_SESS_CACHE_FULL:
1180                 return(ctx->stats.sess_cache_full);
1181         case SSL_CTRL_OPTIONS:
1182                 return(ctx->options|=larg);
1183         case SSL_CTRL_CLEAR_OPTIONS:
1184                 return(ctx->options&=~larg);
1185         case SSL_CTRL_MODE:
1186                 return(ctx->mode|=larg);
1187         case SSL_CTRL_CLEAR_MODE:
1188                 return(ctx->mode&=~larg);
1189         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1190                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1191                         return 0;
1192                 ctx->max_send_fragment = larg;
1193                 return 1;
1194         default:
1195                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1196                 }
1197         }
1198
1199 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1200         {
1201         switch(cmd)
1202                 {
1203         case SSL_CTRL_SET_MSG_CALLBACK:
1204                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1205                 return 1;
1206
1207         default:
1208                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1209                 }
1210         }
1211
1212 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1213         {
1214         long l;
1215
1216         l=a->id-b->id;
1217         if (l == 0L)
1218                 return(0);
1219         else
1220                 return((l > 0)?1:-1);
1221         }
1222
1223 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1224                         const SSL_CIPHER * const *bp)
1225         {
1226         long l;
1227
1228         l=(*ap)->id-(*bp)->id;
1229         if (l == 0L)
1230                 return(0);
1231         else
1232                 return((l > 0)?1:-1);
1233         }
1234
1235 /** return a STACK of the ciphers available for the SSL and in order of
1236  * preference */
1237 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1238         {
1239         if (s != NULL)
1240                 {
1241                 if (s->cipher_list != NULL)
1242                         {
1243                         return(s->cipher_list);
1244                         }
1245                 else if ((s->ctx != NULL) &&
1246                         (s->ctx->cipher_list != NULL))
1247                         {
1248                         return(s->ctx->cipher_list);
1249                         }
1250                 }
1251         return(NULL);
1252         }
1253
1254 /** return a STACK of the ciphers available for the SSL and in order of
1255  * algorithm id */
1256 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1257         {
1258         if (s != NULL)
1259                 {
1260                 if (s->cipher_list_by_id != NULL)
1261                         {
1262                         return(s->cipher_list_by_id);
1263                         }
1264                 else if ((s->ctx != NULL) &&
1265                         (s->ctx->cipher_list_by_id != NULL))
1266                         {
1267                         return(s->ctx->cipher_list_by_id);
1268                         }
1269                 }
1270         return(NULL);
1271         }
1272
1273 /** The old interface to get the same thing as SSL_get_ciphers() */
1274 const char *SSL_get_cipher_list(const SSL *s,int n)
1275         {
1276         SSL_CIPHER *c;
1277         STACK_OF(SSL_CIPHER) *sk;
1278
1279         if (s == NULL) return(NULL);
1280         sk=SSL_get_ciphers(s);
1281         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1282                 return(NULL);
1283         c=sk_SSL_CIPHER_value(sk,n);
1284         if (c == NULL) return(NULL);
1285         return(c->name);
1286         }
1287
1288 /** specify the ciphers to be used by default by the SSL_CTX */
1289 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1290         {
1291         STACK_OF(SSL_CIPHER) *sk;
1292
1293         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1294                 &ctx->cipher_list_by_id,str);
1295         /* ssl_create_cipher_list may return an empty stack if it
1296          * was unable to find a cipher matching the given rule string
1297          * (for example if the rule string specifies a cipher which
1298          * has been disabled). This is not an error as far as
1299          * ssl_create_cipher_list is concerned, and hence
1300          * ctx->cipher_list and ctx->cipher_list_by_id has been
1301          * updated. */
1302         if (sk == NULL)
1303                 return 0;
1304         else if (sk_SSL_CIPHER_num(sk) == 0)
1305                 {
1306                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1307                 return 0;
1308                 }
1309         return 1;
1310         }
1311
1312 /** specify the ciphers to be used by the SSL */
1313 int SSL_set_cipher_list(SSL *s,const char *str)
1314         {
1315         STACK_OF(SSL_CIPHER) *sk;
1316
1317         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1318                 &s->cipher_list_by_id,str);
1319         /* see comment in SSL_CTX_set_cipher_list */
1320         if (sk == NULL)
1321                 return 0;
1322         else if (sk_SSL_CIPHER_num(sk) == 0)
1323                 {
1324                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1325                 return 0;
1326                 }
1327         return 1;
1328         }
1329
1330 /* works well for SSLv2, not so good for SSLv3 */
1331 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1332         {
1333         char *p;
1334         STACK_OF(SSL_CIPHER) *sk;
1335         SSL_CIPHER *c;
1336         int i;
1337
1338         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1339                 (len < 2))
1340                 return(NULL);
1341
1342         p=buf;
1343         sk=s->session->ciphers;
1344         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1345                 {
1346                 int n;
1347
1348                 c=sk_SSL_CIPHER_value(sk,i);
1349                 n=strlen(c->name);
1350                 if (n+1 > len)
1351                         {
1352                         if (p != buf)
1353                                 --p;
1354                         *p='\0';
1355                         return buf;
1356                         }
1357                 strcpy(p,c->name);
1358                 p+=n;
1359                 *(p++)=':';
1360                 len-=n+1;
1361                 }
1362         p[-1]='\0';
1363         return(buf);
1364         }
1365
1366 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1367                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1368         {
1369         int i,j=0;
1370         SSL_CIPHER *c;
1371         unsigned char *q;
1372 #ifndef OPENSSL_NO_KRB5
1373         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1374 #endif /* OPENSSL_NO_KRB5 */
1375
1376         if (sk == NULL) return(0);
1377         q=p;
1378
1379         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1380                 {
1381                 c=sk_SSL_CIPHER_value(sk,i);
1382                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1383                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1384                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1385                         continue;
1386 #ifndef OPENSSL_NO_KRB5
1387                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1388                     nokrb5)
1389                     continue;
1390 #endif /* OPENSSL_NO_KRB5 */
1391 #ifndef OPENSSL_NO_PSK
1392                 /* with PSK there must be client callback set */
1393                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1394                     s->psk_client_callback == NULL)
1395                         continue;
1396 #endif /* OPENSSL_NO_PSK */
1397                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1398                 p+=j;
1399                 }
1400         /* If p == q, no ciphers and caller indicates an error. Otherwise
1401          * add SCSV if not renegotiating.
1402          */
1403         if (p != q && !s->renegotiate)
1404                 {
1405                 static SSL_CIPHER scsv =
1406                         {
1407                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1408                         };
1409                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1410                 p+=j;
1411 #ifdef OPENSSL_RI_DEBUG
1412                 fprintf(stderr, "SCSV sent by client\n");
1413 #endif
1414                 }
1415
1416         return(p-q);
1417         }
1418
1419 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1420                                                STACK_OF(SSL_CIPHER) **skp)
1421         {
1422         const SSL_CIPHER *c;
1423         STACK_OF(SSL_CIPHER) *sk;
1424         int i,n;
1425         if (s->s3)
1426                 s->s3->send_connection_binding = 0;
1427
1428         n=ssl_put_cipher_by_char(s,NULL,NULL);
1429         if ((num%n) != 0)
1430                 {
1431                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1432                 return(NULL);
1433                 }
1434         if ((skp == NULL) || (*skp == NULL))
1435                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1436         else
1437                 {
1438                 sk= *skp;
1439                 sk_SSL_CIPHER_zero(sk);
1440                 }
1441
1442         for (i=0; i<num; i+=n)
1443                 {
1444                 /* Check for SCSV */
1445                 if (s->s3 && (n != 3 || !p[0]) &&
1446                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1447                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1448                         {
1449                         /* SCSV fatal if renegotiating */
1450                         if (s->renegotiate)
1451                                 {
1452                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1453                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1454                                 goto err;
1455                                 }
1456                         s->s3->send_connection_binding = 1;
1457                         p += n;
1458 #ifdef OPENSSL_RI_DEBUG
1459                         fprintf(stderr, "SCSV received by server\n");
1460 #endif
1461                         continue;
1462                         }
1463
1464                 c=ssl_get_cipher_by_char(s,p);
1465                 p+=n;
1466                 if (c != NULL)
1467                         {
1468                         if (!sk_SSL_CIPHER_push(sk,c))
1469                                 {
1470                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1471                                 goto err;
1472                                 }
1473                         }
1474                 }
1475
1476         if (skp != NULL)
1477                 *skp=sk;
1478         return(sk);
1479 err:
1480         if ((skp == NULL) || (*skp == NULL))
1481                 sk_SSL_CIPHER_free(sk);
1482         return(NULL);
1483         }
1484
1485
1486 #ifndef OPENSSL_NO_TLSEXT
1487 /** return a servername extension value if provided in Client Hello, or NULL.
1488  * So far, only host_name types are defined (RFC 3546).
1489  */
1490
1491 const char *SSL_get_servername(const SSL *s, const int type)
1492         {
1493         if (type != TLSEXT_NAMETYPE_host_name)
1494                 return NULL;
1495
1496         return s->session && !s->tlsext_hostname ?
1497                 s->session->tlsext_hostname :
1498                 s->tlsext_hostname;
1499         }
1500
1501 int SSL_get_servername_type(const SSL *s)
1502         {
1503         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1504                 return TLSEXT_NAMETYPE_host_name;
1505         return -1;
1506         }
1507
1508 # ifndef OPENSSL_NO_NEXTPROTONEG
1509 /* SSL_select_next_proto implements the standard protocol selection. It is
1510  * expected that this function is called from the callback set by
1511  * SSL_CTX_set_next_proto_select_cb.
1512  *
1513  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1514  * strings. The length byte itself is not included in the length. A byte
1515  * string of length 0 is invalid. No byte string may be truncated.
1516  *
1517  * The current, but experimental algorithm for selecting the protocol is:
1518  *
1519  * 1) If the server doesn't support NPN then this is indicated to the
1520  * callback. In this case, the client application has to abort the connection
1521  * or have a default application level protocol.
1522  *
1523  * 2) If the server supports NPN, but advertises an empty list then the
1524  * client selects the first protcol in its list, but indicates via the
1525  * API that this fallback case was enacted.
1526  *
1527  * 3) Otherwise, the client finds the first protocol in the server's list
1528  * that it supports and selects this protocol. This is because it's
1529  * assumed that the server has better information about which protocol
1530  * a client should use.
1531  *
1532  * 4) If the client doesn't support any of the server's advertised
1533  * protocols, then this is treated the same as case 2.
1534  *
1535  * It returns either
1536  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1537  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1538  */
1539 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)
1540         {
1541         unsigned int i, j;
1542         const unsigned char *result;
1543         int status = OPENSSL_NPN_UNSUPPORTED;
1544
1545         /* For each protocol in server preference order, see if we support it. */
1546         for (i = 0; i < server_len; )
1547                 {
1548                 for (j = 0; j < client_len; )
1549                         {
1550                         if (server[i] == client[j] &&
1551                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1552                                 {
1553                                 /* We found a match */
1554                                 result = &server[i];
1555                                 status = OPENSSL_NPN_NEGOTIATED;
1556                                 goto found;
1557                                 }
1558                         j += client[j];
1559                         j++;
1560                         }
1561                 i += server[i];
1562                 i++;
1563                 }
1564
1565         /* There's no overlap between our protocols and the server's list. */
1566         result = client;
1567         status = OPENSSL_NPN_NO_OVERLAP;
1568
1569         found:
1570         *out = (unsigned char *) result + 1;
1571         *outlen = result[0];
1572         return status;
1573         }
1574
1575 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1576  * requested protocol for this connection and returns 0. If the client didn't
1577  * request any protocol, then *data is set to NULL.
1578  *
1579  * Note that the client can request any protocol it chooses. The value returned
1580  * from this function need not be a member of the list of supported protocols
1581  * provided by the callback.
1582  */
1583 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1584         {
1585         *data = s->next_proto_negotiated;
1586         if (!*data) {
1587                 *len = 0;
1588         } else {
1589                 *len = s->next_proto_negotiated_len;
1590         }
1591 }
1592
1593 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1594  * TLS server needs a list of supported protocols for Next Protocol
1595  * Negotiation. The returned list must be in wire format.  The list is returned
1596  * by setting |out| to point to it and |outlen| to its length. This memory will
1597  * not be modified, but one should assume that the SSL* keeps a reference to
1598  * it.
1599  *
1600  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1601  * such extension will be included in the ServerHello. */
1602 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)
1603         {
1604         ctx->next_protos_advertised_cb = cb;
1605         ctx->next_protos_advertised_cb_arg = arg;
1606         }
1607
1608 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1609  * client needs to select a protocol from the server's provided list. |out|
1610  * must be set to point to the selected protocol (which may be within |in|).
1611  * The length of the protocol name must be written into |outlen|. The server's
1612  * advertised protocols are provided in |in| and |inlen|. The callback can
1613  * assume that |in| is syntactically valid.
1614  *
1615  * The client must select a protocol. It is fatal to the connection if this
1616  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1617  */
1618 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)
1619         {
1620         ctx->next_proto_select_cb = cb;
1621         ctx->next_proto_select_cb_arg = arg;
1622         }
1623
1624 # endif
1625 #endif
1626
1627 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1628         {
1629         unsigned long l;
1630
1631         l=(unsigned long)
1632                 ((unsigned int) a->session_id[0]     )|
1633                 ((unsigned int) a->session_id[1]<< 8L)|
1634                 ((unsigned long)a->session_id[2]<<16L)|
1635                 ((unsigned long)a->session_id[3]<<24L);
1636         return(l);
1637         }
1638
1639 /* NB: If this function (or indeed the hash function which uses a sort of
1640  * coarser function than this one) is changed, ensure
1641  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1642  * able to construct an SSL_SESSION that will collide with any existing session
1643  * with a matching session ID. */
1644 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1645         {
1646         if (a->ssl_version != b->ssl_version)
1647                 return(1);
1648         if (a->session_id_length != b->session_id_length)
1649                 return(1);
1650         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1651         }
1652
1653 /* These wrapper functions should remain rather than redeclaring
1654  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1655  * variable. The reason is that the functions aren't static, they're exposed via
1656  * ssl.h. */
1657 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1658 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1659
1660 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1661         {
1662         SSL_CTX *ret=NULL;
1663
1664         if (meth == NULL)
1665                 {
1666                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1667                 return(NULL);
1668                 }
1669
1670 #ifdef OPENSSL_FIPS
1671         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1672                 {
1673                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1674                 return NULL;
1675                 }
1676 #endif
1677
1678         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1679                 {
1680                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1681                 goto err;
1682                 }
1683         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1684         if (ret == NULL)
1685                 goto err;
1686
1687         memset(ret,0,sizeof(SSL_CTX));
1688
1689         ret->method=meth;
1690
1691         ret->cert_store=NULL;
1692         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1693         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1694         ret->session_cache_head=NULL;
1695         ret->session_cache_tail=NULL;
1696
1697         /* We take the system default */
1698         ret->session_timeout=meth->get_timeout();
1699
1700         ret->new_session_cb=0;
1701         ret->remove_session_cb=0;
1702         ret->get_session_cb=0;
1703         ret->generate_session_id=0;
1704
1705         memset((char *)&ret->stats,0,sizeof(ret->stats));
1706
1707         ret->references=1;
1708         ret->quiet_shutdown=0;
1709
1710 /*      ret->cipher=NULL;*/
1711 /*      ret->s2->challenge=NULL;
1712         ret->master_key=NULL;
1713         ret->key_arg=NULL;
1714         ret->s2->conn_id=NULL; */
1715
1716         ret->info_callback=NULL;
1717
1718         ret->app_verify_callback=0;
1719         ret->app_verify_arg=NULL;
1720
1721         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1722         ret->read_ahead=0;
1723         ret->msg_callback=0;
1724         ret->msg_callback_arg=NULL;
1725         ret->verify_mode=SSL_VERIFY_NONE;
1726 #if 0
1727         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1728 #endif
1729         ret->sid_ctx_length=0;
1730         ret->default_verify_callback=NULL;
1731         if ((ret->cert=ssl_cert_new()) == NULL)
1732                 goto err;
1733
1734         ret->default_passwd_callback=0;
1735         ret->default_passwd_callback_userdata=NULL;
1736         ret->client_cert_cb=0;
1737         ret->app_gen_cookie_cb=0;
1738         ret->app_verify_cookie_cb=0;
1739
1740         ret->sessions=lh_SSL_SESSION_new();
1741         if (ret->sessions == NULL) goto err;
1742         ret->cert_store=X509_STORE_new();
1743         if (ret->cert_store == NULL) goto err;
1744
1745         ssl_create_cipher_list(ret->method,
1746                 &ret->cipher_list,&ret->cipher_list_by_id,
1747                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1748         if (ret->cipher_list == NULL
1749             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1750                 {
1751                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1752                 goto err2;
1753                 }
1754
1755         ret->param = X509_VERIFY_PARAM_new();
1756         if (!ret->param)
1757                 goto err;
1758
1759         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1760                 {
1761                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1762                 goto err2;
1763                 }
1764         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1765                 {
1766                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1767                 goto err2;
1768                 }
1769         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1770                 {
1771                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1772                 goto err2;
1773                 }
1774
1775         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1776                 goto err;
1777
1778         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1779
1780         ret->extra_certs=NULL;
1781         ret->comp_methods=SSL_COMP_get_compression_methods();
1782
1783         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1784
1785 #ifndef OPENSSL_NO_TLSEXT
1786         ret->tlsext_servername_callback = 0;
1787         ret->tlsext_servername_arg = NULL;
1788         /* Setup RFC4507 ticket keys */
1789         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1790                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1791                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1792                 ret->options |= SSL_OP_NO_TICKET;
1793
1794         ret->tlsext_status_cb = 0;
1795         ret->tlsext_status_arg = NULL;
1796
1797 # ifndef OPENSSL_NO_NEXTPROTONEG
1798         ret->next_protos_advertised_cb = 0;
1799         ret->next_proto_select_cb = 0;
1800 # endif
1801 #endif
1802 #ifndef OPENSSL_NO_PSK
1803         ret->psk_identity_hint=NULL;
1804         ret->psk_client_callback=NULL;
1805         ret->psk_server_callback=NULL;
1806 #endif
1807 #ifndef OPENSSL_NO_SRP
1808         SSL_CTX_SRP_CTX_init(ret);
1809 #endif
1810 #ifndef OPENSSL_NO_BUF_FREELISTS
1811         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1812         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1813         if (!ret->rbuf_freelist)
1814                 goto err;
1815         ret->rbuf_freelist->chunklen = 0;
1816         ret->rbuf_freelist->len = 0;
1817         ret->rbuf_freelist->head = NULL;
1818         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1819         if (!ret->wbuf_freelist)
1820                 {
1821                 OPENSSL_free(ret->rbuf_freelist);
1822                 goto err;
1823                 }
1824         ret->wbuf_freelist->chunklen = 0;
1825         ret->wbuf_freelist->len = 0;
1826         ret->wbuf_freelist->head = NULL;
1827 #endif
1828 #ifndef OPENSSL_NO_ENGINE
1829         ret->client_cert_engine = NULL;
1830 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1831 #define eng_strx(x)     #x
1832 #define eng_str(x)      eng_strx(x)
1833         /* Use specific client engine automatically... ignore errors */
1834         {
1835         ENGINE *eng;
1836         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1837         if (!eng)
1838                 {
1839                 ERR_clear_error();
1840                 ENGINE_load_builtin_engines();
1841                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1842                 }
1843         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1844                 ERR_clear_error();
1845         }
1846 #endif
1847 #endif
1848         /* Default is to connect to non-RI servers. When RI is more widely
1849          * deployed might change this.
1850          */
1851         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1852         /* Disable TLS v1.2 by default for now */
1853         ret->options |= SSL_OP_NO_TLSv1_2;
1854
1855         return(ret);
1856 err:
1857         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1858 err2:
1859         if (ret != NULL) SSL_CTX_free(ret);
1860         return(NULL);
1861         }
1862
1863 #if 0
1864 static void SSL_COMP_free(SSL_COMP *comp)
1865     { OPENSSL_free(comp); }
1866 #endif
1867
1868 #ifndef OPENSSL_NO_BUF_FREELISTS
1869 static void
1870 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1871         {
1872         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1873         for (ent = list->head; ent; ent = next)
1874                 {
1875                 next = ent->next;
1876                 OPENSSL_free(ent);
1877                 }
1878         OPENSSL_free(list);
1879         }
1880 #endif
1881
1882 void SSL_CTX_free(SSL_CTX *a)
1883         {
1884         int i;
1885
1886         if (a == NULL) return;
1887
1888         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1889 #ifdef REF_PRINT
1890         REF_PRINT("SSL_CTX",a);
1891 #endif
1892         if (i > 0) return;
1893 #ifdef REF_CHECK
1894         if (i < 0)
1895                 {
1896                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1897                 abort(); /* ok */
1898                 }
1899 #endif
1900
1901         if (a->param)
1902                 X509_VERIFY_PARAM_free(a->param);
1903
1904         /*
1905          * Free internal session cache. However: the remove_cb() may reference
1906          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1907          * after the sessions were flushed.
1908          * As the ex_data handling routines might also touch the session cache,
1909          * the most secure solution seems to be: empty (flush) the cache, then
1910          * free ex_data, then finally free the cache.
1911          * (See ticket [openssl.org #212].)
1912          */
1913         if (a->sessions != NULL)
1914                 SSL_CTX_flush_sessions(a,0);
1915
1916         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1917
1918         if (a->sessions != NULL)
1919                 lh_SSL_SESSION_free(a->sessions);
1920
1921         if (a->cert_store != NULL)
1922                 X509_STORE_free(a->cert_store);
1923         if (a->cipher_list != NULL)
1924                 sk_SSL_CIPHER_free(a->cipher_list);
1925         if (a->cipher_list_by_id != NULL)
1926                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1927         if (a->cert != NULL)
1928                 ssl_cert_free(a->cert);
1929         if (a->client_CA != NULL)
1930                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1931         if (a->extra_certs != NULL)
1932                 sk_X509_pop_free(a->extra_certs,X509_free);
1933 #if 0 /* This should never be done, since it removes a global database */
1934         if (a->comp_methods != NULL)
1935                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1936 #else
1937         a->comp_methods = NULL;
1938 #endif
1939
1940 #ifndef OPENSSL_NO_PSK
1941         if (a->psk_identity_hint)
1942                 OPENSSL_free(a->psk_identity_hint);
1943 #endif
1944 #ifndef OPENSSL_NO_SRP
1945         SSL_CTX_SRP_CTX_free(a);
1946 #endif
1947 #ifndef OPENSSL_NO_ENGINE
1948         if (a->client_cert_engine)
1949                 ENGINE_finish(a->client_cert_engine);
1950 #endif
1951
1952 #ifndef OPENSSL_NO_BUF_FREELISTS
1953         if (a->wbuf_freelist)
1954                 ssl_buf_freelist_free(a->wbuf_freelist);
1955         if (a->rbuf_freelist)
1956                 ssl_buf_freelist_free(a->rbuf_freelist);
1957 #endif
1958
1959         OPENSSL_free(a);
1960         }
1961
1962 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1963         {
1964         ctx->default_passwd_callback=cb;
1965         }
1966
1967 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1968         {
1969         ctx->default_passwd_callback_userdata=u;
1970         }
1971
1972 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1973         {
1974         ctx->app_verify_callback=cb;
1975         ctx->app_verify_arg=arg;
1976         }
1977
1978 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1979         {
1980         ctx->verify_mode=mode;
1981         ctx->default_verify_callback=cb;
1982         }
1983
1984 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1985         {
1986         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1987         }
1988
1989 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1990         {
1991         CERT_PKEY *cpk;
1992         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1993         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1994         int rsa_tmp_export,dh_tmp_export,kl;
1995         unsigned long mask_k,mask_a,emask_k,emask_a;
1996         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1997 #ifndef OPENSSL_NO_ECDH
1998         int have_ecdh_tmp;
1999 #endif
2000         X509 *x = NULL;
2001         EVP_PKEY *ecc_pkey = NULL;
2002         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2003
2004         if (c == NULL) return;
2005
2006         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2007
2008 #ifndef OPENSSL_NO_RSA
2009         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2010         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2011                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2012 #else
2013         rsa_tmp=rsa_tmp_export=0;
2014 #endif
2015 #ifndef OPENSSL_NO_DH
2016         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2017         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2018                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2019 #else
2020         dh_tmp=dh_tmp_export=0;
2021 #endif
2022
2023 #ifndef OPENSSL_NO_ECDH
2024         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2025 #endif
2026         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2027         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2028         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2029         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2030         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2031         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2032         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2033         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2034         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2035         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2036         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2037 /* FIX THIS EAY EAY EAY */
2038         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2039         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2040         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2041         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2042         mask_k=0;
2043         mask_a=0;
2044         emask_k=0;
2045         emask_a=0;
2046
2047
2048
2049 #ifdef CIPHER_DEBUG
2050         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2051                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2052                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2053 #endif
2054
2055         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2056         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2057                 mask_k |= SSL_kGOST;
2058                 mask_a |= SSL_aGOST01;
2059         }
2060         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2061         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2062                 mask_k |= SSL_kGOST;
2063                 mask_a |= SSL_aGOST94;
2064         }
2065
2066         if (rsa_enc || (rsa_tmp && rsa_sign))
2067                 mask_k|=SSL_kRSA;
2068         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2069                 emask_k|=SSL_kRSA;
2070
2071 #if 0
2072         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2073         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2074                 (rsa_enc || rsa_sign || dsa_sign))
2075                 mask_k|=SSL_kEDH;
2076         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2077                 (rsa_enc || rsa_sign || dsa_sign))
2078                 emask_k|=SSL_kEDH;
2079 #endif
2080
2081         if (dh_tmp_export)
2082                 emask_k|=SSL_kEDH;
2083
2084         if (dh_tmp)
2085                 mask_k|=SSL_kEDH;
2086
2087         if (dh_rsa) mask_k|=SSL_kDHr;
2088         if (dh_rsa_export) emask_k|=SSL_kDHr;
2089
2090         if (dh_dsa) mask_k|=SSL_kDHd;
2091         if (dh_dsa_export) emask_k|=SSL_kDHd;
2092
2093         if (rsa_enc || rsa_sign)
2094                 {
2095                 mask_a|=SSL_aRSA;
2096                 emask_a|=SSL_aRSA;
2097                 }
2098
2099         if (dsa_sign)
2100                 {
2101                 mask_a|=SSL_aDSS;
2102                 emask_a|=SSL_aDSS;
2103                 }
2104
2105         mask_a|=SSL_aNULL;
2106         emask_a|=SSL_aNULL;
2107
2108 #ifndef OPENSSL_NO_KRB5
2109         mask_k|=SSL_kKRB5;
2110         mask_a|=SSL_aKRB5;
2111         emask_k|=SSL_kKRB5;
2112         emask_a|=SSL_aKRB5;
2113 #endif
2114
2115         /* An ECC certificate may be usable for ECDH and/or
2116          * ECDSA cipher suites depending on the key usage extension.
2117          */
2118         if (have_ecc_cert)
2119                 {
2120                 /* This call populates extension flags (ex_flags) */
2121                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2122                 X509_check_purpose(x, -1, 0);
2123                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2124                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2125                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2126                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2127                 ecc_pkey = X509_get_pubkey(x);
2128                 ecc_pkey_size = (ecc_pkey != NULL) ?
2129                     EVP_PKEY_bits(ecc_pkey) : 0;
2130                 EVP_PKEY_free(ecc_pkey);
2131                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2132                         {
2133                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2134                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2135                         }
2136 #ifndef OPENSSL_NO_ECDH
2137                 if (ecdh_ok)
2138                         {
2139
2140                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2141                                 {
2142                                 mask_k|=SSL_kECDHr;
2143                                 mask_a|=SSL_aECDH;
2144                                 if (ecc_pkey_size <= 163)
2145                                         {
2146                                         emask_k|=SSL_kECDHr;
2147                                         emask_a|=SSL_aECDH;
2148                                         }
2149                                 }
2150
2151                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2152                                 {
2153                                 mask_k|=SSL_kECDHe;
2154                                 mask_a|=SSL_aECDH;
2155                                 if (ecc_pkey_size <= 163)
2156                                         {
2157                                         emask_k|=SSL_kECDHe;
2158                                         emask_a|=SSL_aECDH;
2159                                         }
2160                                 }
2161                         }
2162 #endif
2163 #ifndef OPENSSL_NO_ECDSA
2164                 if (ecdsa_ok)
2165                         {
2166                         mask_a|=SSL_aECDSA;
2167                         emask_a|=SSL_aECDSA;
2168                         }
2169 #endif
2170                 }
2171
2172 #ifndef OPENSSL_NO_ECDH
2173         if (have_ecdh_tmp)
2174                 {
2175                 mask_k|=SSL_kEECDH;
2176                 emask_k|=SSL_kEECDH;
2177                 }
2178 #endif
2179
2180 #ifndef OPENSSL_NO_PSK
2181         mask_k |= SSL_kPSK;
2182         mask_a |= SSL_aPSK;
2183         emask_k |= SSL_kPSK;
2184         emask_a |= SSL_aPSK;
2185 #endif
2186
2187         c->mask_k=mask_k;
2188         c->mask_a=mask_a;
2189         c->export_mask_k=emask_k;
2190         c->export_mask_a=emask_a;
2191         c->valid=1;
2192         }
2193
2194 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2195 #define ku_reject(x, usage) \
2196         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2197
2198 #ifndef OPENSSL_NO_EC
2199
2200 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2201         {
2202         unsigned long alg_k, alg_a;
2203         EVP_PKEY *pkey = NULL;
2204         int keysize = 0;
2205         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2206         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2207
2208         alg_k = cs->algorithm_mkey;
2209         alg_a = cs->algorithm_auth;
2210
2211         if (SSL_C_IS_EXPORT(cs))
2212                 {
2213                 /* ECDH key length in export ciphers must be <= 163 bits */
2214                 pkey = X509_get_pubkey(x);
2215                 if (pkey == NULL) return 0;
2216                 keysize = EVP_PKEY_bits(pkey);
2217                 EVP_PKEY_free(pkey);
2218                 if (keysize > 163) return 0;
2219                 }
2220
2221         /* This call populates the ex_flags field correctly */
2222         X509_check_purpose(x, -1, 0);
2223         if ((x->sig_alg) && (x->sig_alg->algorithm))
2224                 {
2225                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2226                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2227                 }
2228         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2229                 {
2230                 /* key usage, if present, must allow key agreement */
2231                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2232                         {
2233                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2234                         return 0;
2235                         }
2236                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2237                         {
2238                         /* signature alg must be ECDSA */
2239                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2240                                 {
2241                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2242                                 return 0;
2243                                 }
2244                         }
2245                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2246                         {
2247                         /* signature alg must be RSA */
2248
2249                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2250                                 {
2251                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2252                                 return 0;
2253                                 }
2254                         }
2255                 }
2256         if (alg_a & SSL_aECDSA)
2257                 {
2258                 /* key usage, if present, must allow signing */
2259                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2260                         {
2261                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2262                         return 0;
2263                         }
2264                 }
2265
2266         return 1;  /* all checks are ok */
2267         }
2268
2269 #endif
2270
2271 /* THIS NEEDS CLEANING UP */
2272 X509 *ssl_get_server_send_cert(SSL *s)
2273         {
2274         unsigned long alg_k,alg_a;
2275         CERT *c;
2276         int i;
2277
2278         c=s->cert;
2279         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2280
2281         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2282         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2283
2284         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2285                 {
2286                 /* we don't need to look at SSL_kEECDH
2287                  * since no certificate is needed for
2288                  * anon ECDH and for authenticated
2289                  * EECDH, the check for the auth
2290                  * algorithm will set i correctly
2291                  * NOTE: For ECDH-RSA, we need an ECC
2292                  * not an RSA cert but for EECDH-RSA
2293                  * we need an RSA cert. Placing the
2294                  * checks for SSL_kECDH before RSA
2295                  * checks ensures the correct cert is chosen.
2296                  */
2297                 i=SSL_PKEY_ECC;
2298                 }
2299         else if (alg_a & SSL_aECDSA)
2300                 {
2301                 i=SSL_PKEY_ECC;
2302                 }
2303         else if (alg_k & SSL_kDHr)
2304                 i=SSL_PKEY_DH_RSA;
2305         else if (alg_k & SSL_kDHd)
2306                 i=SSL_PKEY_DH_DSA;
2307         else if (alg_a & SSL_aDSS)
2308                 i=SSL_PKEY_DSA_SIGN;
2309         else if (alg_a & SSL_aRSA)
2310                 {
2311                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2312                         i=SSL_PKEY_RSA_SIGN;
2313                 else
2314                         i=SSL_PKEY_RSA_ENC;
2315                 }
2316         else if (alg_a & SSL_aKRB5)
2317                 {
2318                 /* VRS something else here? */
2319                 return(NULL);
2320                 }
2321         else if (alg_a & SSL_aGOST94)
2322                 i=SSL_PKEY_GOST94;
2323         else if (alg_a & SSL_aGOST01)
2324                 i=SSL_PKEY_GOST01;
2325         else /* if (alg_a & SSL_aNULL) */
2326                 {
2327                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2328                 return(NULL);
2329                 }
2330         if (c->pkeys[i].x509 == NULL) return(NULL);
2331
2332         return(c->pkeys[i].x509);
2333         }
2334
2335 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2336         {
2337         unsigned long alg_a;
2338         CERT *c;
2339         int idx = -1;
2340
2341         alg_a = cipher->algorithm_auth;
2342         c=s->cert;
2343
2344         if ((alg_a & SSL_aDSS) &&
2345                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2346                 idx = SSL_PKEY_DSA_SIGN;
2347         else if (alg_a & SSL_aRSA)
2348                 {
2349                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2350                         idx = SSL_PKEY_RSA_SIGN;
2351                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2352                         idx = SSL_PKEY_RSA_ENC;
2353                 }
2354         else if ((alg_a & SSL_aECDSA) &&
2355                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2356                 idx = SSL_PKEY_ECC;
2357         if (idx == -1)
2358                 {
2359                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2360                 return(NULL);
2361                 }
2362         if (pmd)
2363                 *pmd = c->pkeys[idx].digest;
2364         return c->pkeys[idx].privatekey;
2365         }
2366
2367 void ssl_update_cache(SSL *s,int mode)
2368         {
2369         int i;
2370
2371         /* If the session_id_length is 0, we are not supposed to cache it,
2372          * and it would be rather hard to do anyway :-) */
2373         if (s->session->session_id_length == 0) return;
2374
2375         i=s->session_ctx->session_cache_mode;
2376         if ((i & mode) && (!s->hit)
2377                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2378                     || SSL_CTX_add_session(s->session_ctx,s->session))
2379                 && (s->session_ctx->new_session_cb != NULL))
2380                 {
2381                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2382                 if (!s->session_ctx->new_session_cb(s,s->session))
2383                         SSL_SESSION_free(s->session);
2384                 }
2385
2386         /* auto flush every 255 connections */
2387         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2388                 ((i & mode) == mode))
2389                 {
2390                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2391                         ?s->session_ctx->stats.sess_connect_good
2392                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2393                         {
2394                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2395                         }
2396                 }
2397         }
2398
2399 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2400         {
2401         return(s->method);
2402         }
2403
2404 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2405         {
2406         int conn= -1;
2407         int ret=1;
2408
2409         if (s->method != meth)
2410                 {
2411                 if (s->handshake_func != NULL)
2412                         conn=(s->handshake_func == s->method->ssl_connect);
2413
2414                 if (s->method->version == meth->version)
2415                         s->method=meth;
2416                 else
2417                         {
2418                         s->method->ssl_free(s);
2419                         s->method=meth;
2420                         ret=s->method->ssl_new(s);
2421                         }
2422
2423                 if (conn == 1)
2424                         s->handshake_func=meth->ssl_connect;
2425                 else if (conn == 0)
2426                         s->handshake_func=meth->ssl_accept;
2427                 }
2428         return(ret);
2429         }
2430
2431 int SSL_get_error(const SSL *s,int i)
2432         {
2433         int reason;
2434         unsigned long l;
2435         BIO *bio;
2436
2437         if (i > 0) return(SSL_ERROR_NONE);
2438
2439         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2440          * etc, where we do encode the error */
2441         if ((l=ERR_peek_error()) != 0)
2442                 {
2443                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2444                         return(SSL_ERROR_SYSCALL);
2445                 else
2446                         return(SSL_ERROR_SSL);
2447                 }
2448
2449         if ((i < 0) && SSL_want_read(s))
2450                 {
2451                 bio=SSL_get_rbio(s);
2452                 if (BIO_should_read(bio))
2453                         return(SSL_ERROR_WANT_READ);
2454                 else if (BIO_should_write(bio))
2455                         /* This one doesn't make too much sense ... We never try
2456                          * to write to the rbio, and an application program where
2457                          * rbio and wbio are separate couldn't even know what it
2458                          * should wait for.
2459                          * However if we ever set s->rwstate incorrectly
2460                          * (so that we have SSL_want_read(s) instead of
2461                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2462                          * this test works around that bug; so it might be safer
2463                          * to keep it. */
2464                         return(SSL_ERROR_WANT_WRITE);
2465                 else if (BIO_should_io_special(bio))
2466                         {
2467                         reason=BIO_get_retry_reason(bio);
2468                         if (reason == BIO_RR_CONNECT)
2469                                 return(SSL_ERROR_WANT_CONNECT);
2470                         else if (reason == BIO_RR_ACCEPT)
2471                                 return(SSL_ERROR_WANT_ACCEPT);
2472                         else
2473                                 return(SSL_ERROR_SYSCALL); /* unknown */
2474                         }
2475                 }
2476
2477         if ((i < 0) && SSL_want_write(s))
2478                 {
2479                 bio=SSL_get_wbio(s);
2480                 if (BIO_should_write(bio))
2481                         return(SSL_ERROR_WANT_WRITE);
2482                 else if (BIO_should_read(bio))
2483                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2484                         return(SSL_ERROR_WANT_READ);
2485                 else if (BIO_should_io_special(bio))
2486                         {
2487                         reason=BIO_get_retry_reason(bio);
2488                         if (reason == BIO_RR_CONNECT)
2489                                 return(SSL_ERROR_WANT_CONNECT);
2490                         else if (reason == BIO_RR_ACCEPT)
2491                                 return(SSL_ERROR_WANT_ACCEPT);
2492                         else
2493                                 return(SSL_ERROR_SYSCALL);
2494                         }
2495                 }
2496         if ((i < 0) && SSL_want_x509_lookup(s))
2497                 {
2498                 return(SSL_ERROR_WANT_X509_LOOKUP);
2499                 }
2500
2501         if (i == 0)
2502                 {
2503                 if (s->version == SSL2_VERSION)
2504                         {
2505                         /* assume it is the socket being closed */
2506                         return(SSL_ERROR_ZERO_RETURN);
2507                         }
2508                 else
2509                         {
2510                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2511                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2512                                 return(SSL_ERROR_ZERO_RETURN);
2513                         }
2514                 }
2515         return(SSL_ERROR_SYSCALL);
2516         }
2517
2518 int SSL_do_handshake(SSL *s)
2519         {
2520         int ret=1;
2521
2522         if (s->handshake_func == NULL)
2523                 {
2524                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2525                 return(-1);
2526                 }
2527
2528         s->method->ssl_renegotiate_check(s);
2529
2530         if (SSL_in_init(s) || SSL_in_before(s))
2531                 {
2532                 ret=s->handshake_func(s);
2533                 }
2534         return(ret);
2535         }
2536
2537 /* For the next 2 functions, SSL_clear() sets shutdown and so
2538  * one of these calls will reset it */
2539 void SSL_set_accept_state(SSL *s)
2540         {
2541         s->server=1;
2542         s->shutdown=0;
2543         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2544         s->handshake_func=s->method->ssl_accept;
2545         /* clear the current cipher */
2546         ssl_clear_cipher_ctx(s);
2547         ssl_clear_hash_ctx(&s->read_hash);
2548         ssl_clear_hash_ctx(&s->write_hash);
2549         }
2550
2551 void SSL_set_connect_state(SSL *s)
2552         {
2553         s->server=0;
2554         s->shutdown=0;
2555         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2556         s->handshake_func=s->method->ssl_connect;
2557         /* clear the current cipher */
2558         ssl_clear_cipher_ctx(s);
2559         ssl_clear_hash_ctx(&s->read_hash);
2560         ssl_clear_hash_ctx(&s->write_hash);
2561         }
2562
2563 int ssl_undefined_function(SSL *s)
2564         {
2565         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2566         return(0);
2567         }
2568
2569 int ssl_undefined_void_function(void)
2570         {
2571         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2572         return(0);
2573         }
2574
2575 int ssl_undefined_const_function(const SSL *s)
2576         {
2577         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2578         return(0);
2579         }
2580
2581 SSL_METHOD *ssl_bad_method(int ver)
2582         {
2583         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2584         return(NULL);
2585         }
2586
2587 const char *SSL_get_version(const SSL *s)
2588         {
2589         if (s->version == TLS1_2_VERSION)
2590                 return("TLSv1.2");
2591         else if (s->version == TLS1_1_VERSION)
2592                 return("TLSv1.1");
2593         else if (s->version == TLS1_VERSION)
2594                 return("TLSv1");
2595         else if (s->version == SSL3_VERSION)
2596                 return("SSLv3");
2597         else if (s->version == SSL2_VERSION)
2598                 return("SSLv2");
2599         else
2600                 return("unknown");
2601         }
2602
2603 SSL *SSL_dup(SSL *s)
2604         {
2605         STACK_OF(X509_NAME) *sk;
2606         X509_NAME *xn;
2607         SSL *ret;
2608         int i;
2609
2610         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2611             return(NULL);
2612
2613         ret->version = s->version;
2614         ret->type = s->type;
2615         ret->method = s->method;
2616
2617         if (s->session != NULL)
2618                 {
2619                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2620                 SSL_copy_session_id(ret,s);
2621                 }
2622         else
2623                 {
2624                 /* No session has been established yet, so we have to expect
2625                  * that s->cert or ret->cert will be changed later --
2626                  * they should not both point to the same object,
2627                  * and thus we can't use SSL_copy_session_id. */
2628
2629                 ret->method->ssl_free(ret);
2630                 ret->method = s->method;
2631                 ret->method->ssl_new(ret);
2632
2633                 if (s->cert != NULL)
2634                         {
2635                         if (ret->cert != NULL)
2636                                 {
2637                                 ssl_cert_free(ret->cert);
2638                                 }
2639                         ret->cert = ssl_cert_dup(s->cert);
2640                         if (ret->cert == NULL)
2641                                 goto err;
2642                         }
2643
2644                 SSL_set_session_id_context(ret,
2645                         s->sid_ctx, s->sid_ctx_length);
2646                 }
2647
2648         ret->options=s->options;
2649         ret->mode=s->mode;
2650         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2651         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2652         ret->msg_callback = s->msg_callback;
2653         ret->msg_callback_arg = s->msg_callback_arg;
2654         SSL_set_verify(ret,SSL_get_verify_mode(s),
2655                 SSL_get_verify_callback(s));
2656         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2657         ret->generate_session_id = s->generate_session_id;
2658
2659         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2660
2661         ret->debug=s->debug;
2662
2663         /* copy app data, a little dangerous perhaps */
2664         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2665                 goto err;
2666
2667         /* setup rbio, and wbio */
2668         if (s->rbio != NULL)
2669                 {
2670                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2671                         goto err;
2672                 }
2673         if (s->wbio != NULL)
2674                 {
2675                 if (s->wbio != s->rbio)
2676                         {
2677                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2678                                 goto err;
2679                         }
2680                 else
2681                         ret->wbio=ret->rbio;
2682                 }
2683         ret->rwstate = s->rwstate;
2684         ret->in_handshake = s->in_handshake;
2685         ret->handshake_func = s->handshake_func;
2686         ret->server = s->server;
2687         ret->renegotiate = s->renegotiate;
2688         ret->new_session = s->new_session;
2689         ret->quiet_shutdown = s->quiet_shutdown;
2690         ret->shutdown=s->shutdown;
2691         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2692         ret->rstate=s->rstate;
2693         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2694         ret->hit=s->hit;
2695
2696         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2697
2698         /* dup the cipher_list and cipher_list_by_id stacks */
2699         if (s->cipher_list != NULL)
2700                 {
2701                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2702                         goto err;
2703                 }
2704         if (s->cipher_list_by_id != NULL)
2705                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2706                         == NULL)
2707                         goto err;
2708
2709         /* Dup the client_CA list */
2710         if (s->client_CA != NULL)
2711                 {
2712                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2713                 ret->client_CA=sk;
2714                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2715                         {
2716                         xn=sk_X509_NAME_value(sk,i);
2717                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2718                                 {
2719                                 X509_NAME_free(xn);
2720                                 goto err;
2721                                 }
2722                         }
2723                 }
2724
2725         if (0)
2726                 {
2727 err:
2728                 if (ret != NULL) SSL_free(ret);
2729                 ret=NULL;
2730                 }
2731         return(ret);
2732         }
2733
2734 void ssl_clear_cipher_ctx(SSL *s)
2735         {
2736         if (s->enc_read_ctx != NULL)
2737                 {
2738                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2739                 OPENSSL_free(s->enc_read_ctx);
2740                 s->enc_read_ctx=NULL;
2741                 }
2742         if (s->enc_write_ctx != NULL)
2743                 {
2744                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2745                 OPENSSL_free(s->enc_write_ctx);
2746                 s->enc_write_ctx=NULL;
2747                 }
2748 #ifndef OPENSSL_NO_COMP
2749         if (s->expand != NULL)
2750                 {
2751                 COMP_CTX_free(s->expand);
2752                 s->expand=NULL;
2753                 }
2754         if (s->compress != NULL)
2755                 {
2756                 COMP_CTX_free(s->compress);
2757                 s->compress=NULL;
2758                 }
2759 #endif
2760         }
2761
2762 /* Fix this function so that it takes an optional type parameter */
2763 X509 *SSL_get_certificate(const SSL *s)
2764         {
2765         if (s->cert != NULL)
2766                 return(s->cert->key->x509);
2767         else
2768                 return(NULL);
2769         }
2770
2771 /* Fix this function so that it takes an optional type parameter */
2772 EVP_PKEY *SSL_get_privatekey(SSL *s)
2773         {
2774         if (s->cert != NULL)
2775                 return(s->cert->key->privatekey);
2776         else
2777                 return(NULL);
2778         }
2779
2780 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2781         {
2782         if ((s->session != NULL) && (s->session->cipher != NULL))
2783                 return(s->session->cipher);
2784         return(NULL);
2785         }
2786 #ifdef OPENSSL_NO_COMP
2787 const void *SSL_get_current_compression(SSL *s)
2788         {
2789         return NULL;
2790         }
2791 const void *SSL_get_current_expansion(SSL *s)
2792         {
2793         return NULL;
2794         }
2795 #else
2796
2797 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2798         {
2799         if (s->compress != NULL)
2800                 return(s->compress->meth);
2801         return(NULL);
2802         }
2803
2804 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2805         {
2806         if (s->expand != NULL)
2807                 return(s->expand->meth);
2808         return(NULL);
2809         }
2810 #endif
2811
2812 int ssl_init_wbio_buffer(SSL *s,int push)
2813         {
2814         BIO *bbio;
2815
2816         if (s->bbio == NULL)
2817                 {
2818                 bbio=BIO_new(BIO_f_buffer());
2819                 if (bbio == NULL) return(0);
2820                 s->bbio=bbio;
2821                 }
2822         else
2823                 {
2824                 bbio=s->bbio;
2825                 if (s->bbio == s->wbio)
2826                         s->wbio=BIO_pop(s->wbio);
2827                 }
2828         (void)BIO_reset(bbio);
2829 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2830         if (!BIO_set_read_buffer_size(bbio,1))
2831                 {
2832                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2833                 return(0);
2834                 }
2835         if (push)
2836                 {
2837                 if (s->wbio != bbio)
2838                         s->wbio=BIO_push(bbio,s->wbio);
2839                 }
2840         else
2841                 {
2842                 if (s->wbio == bbio)
2843                         s->wbio=BIO_pop(bbio);
2844                 }
2845         return(1);
2846         }
2847
2848 void ssl_free_wbio_buffer(SSL *s)
2849         {
2850         if (s->bbio == NULL) return;
2851
2852         if (s->bbio == s->wbio)
2853                 {
2854                 /* remove buffering */
2855                 s->wbio=BIO_pop(s->wbio);
2856 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2857                 assert(s->wbio != NULL);
2858 #endif
2859         }
2860         BIO_free(s->bbio);
2861         s->bbio=NULL;
2862         }
2863
2864 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2865         {
2866         ctx->quiet_shutdown=mode;
2867         }
2868
2869 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2870         {
2871         return(ctx->quiet_shutdown);
2872         }
2873
2874 void SSL_set_quiet_shutdown(SSL *s,int mode)
2875         {
2876         s->quiet_shutdown=mode;
2877         }
2878
2879 int SSL_get_quiet_shutdown(const SSL *s)
2880         {
2881         return(s->quiet_shutdown);
2882         }
2883
2884 void SSL_set_shutdown(SSL *s,int mode)
2885         {
2886         s->shutdown=mode;
2887         }
2888
2889 int SSL_get_shutdown(const SSL *s)
2890         {
2891         return(s->shutdown);
2892         }
2893
2894 int SSL_version(const SSL *s)
2895         {
2896         return(s->version);
2897         }
2898
2899 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2900         {
2901         return(ssl->ctx);
2902         }
2903
2904 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2905         {
2906         if (ssl->ctx == ctx)
2907                 return ssl->ctx;
2908 #ifndef OPENSSL_NO_TLSEXT
2909         if (ctx == NULL)
2910                 ctx = ssl->initial_ctx;
2911 #endif
2912         if (ssl->cert != NULL)
2913                 ssl_cert_free(ssl->cert);
2914         ssl->cert = ssl_cert_dup(ctx->cert);
2915         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2916         if (ssl->ctx != NULL)
2917                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2918         ssl->ctx = ctx;
2919         return(ssl->ctx);
2920         }
2921
2922 #ifndef OPENSSL_NO_STDIO
2923 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2924         {
2925         return(X509_STORE_set_default_paths(ctx->cert_store));
2926         }
2927
2928 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2929                 const char *CApath)
2930         {
2931         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2932         }
2933 #endif
2934
2935 void SSL_set_info_callback(SSL *ssl,
2936         void (*cb)(const SSL *ssl,int type,int val))
2937         {
2938         ssl->info_callback=cb;
2939         }
2940
2941 /* One compiler (Diab DCC) doesn't like argument names in returned
2942    function pointer.  */
2943 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2944         {
2945         return ssl->info_callback;
2946         }
2947
2948 int SSL_state(const SSL *ssl)
2949         {
2950         return(ssl->state);
2951         }
2952
2953 void SSL_set_state(SSL *ssl, int state)
2954         {
2955         ssl->state = state;
2956         }
2957
2958 void SSL_set_verify_result(SSL *ssl,long arg)
2959         {
2960         ssl->verify_result=arg;
2961         }
2962
2963 long SSL_get_verify_result(const SSL *ssl)
2964         {
2965         return(ssl->verify_result);
2966         }
2967
2968 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2969                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2970         {
2971         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2972                                 new_func, dup_func, free_func);
2973         }
2974
2975 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2976         {
2977         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2978         }
2979
2980 void *SSL_get_ex_data(const SSL *s,int idx)
2981         {
2982         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2983         }
2984
2985 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2986                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2987         {
2988         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2989                                 new_func, dup_func, free_func);
2990         }
2991
2992 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2993         {
2994         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2995         }
2996
2997 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2998         {
2999         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3000         }
3001
3002 int ssl_ok(SSL *s)
3003         {
3004         return(1);
3005         }
3006
3007 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3008         {
3009         return(ctx->cert_store);
3010         }
3011
3012 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3013         {
3014         if (ctx->cert_store != NULL)
3015                 X509_STORE_free(ctx->cert_store);
3016         ctx->cert_store=store;
3017         }
3018
3019 int SSL_want(const SSL *s)
3020         {
3021         return(s->rwstate);
3022         }
3023
3024 /*!
3025  * \brief Set the callback for generating temporary RSA keys.
3026  * \param ctx the SSL context.
3027  * \param cb the callback
3028  */
3029
3030 #ifndef OPENSSL_NO_RSA
3031 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3032                                                           int is_export,
3033                                                           int keylength))
3034     {
3035     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3036     }
3037
3038 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3039                                                   int is_export,
3040                                                   int keylength))
3041     {
3042     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3043     }
3044 #endif
3045
3046 #ifdef DOXYGEN
3047 /*!
3048  * \brief The RSA temporary key callback function.
3049  * \param ssl the SSL session.
3050  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3051  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3052  * of the required key in bits.
3053  * \return the temporary RSA key.
3054  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3055  */
3056
3057 RSA *cb(SSL *ssl,int is_export,int keylength)
3058     {}
3059 #endif
3060
3061 /*!
3062  * \brief Set the callback for generating temporary DH keys.
3063  * \param ctx the SSL context.
3064  * \param dh the callback
3065  */
3066
3067 #ifndef OPENSSL_NO_DH
3068 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3069                                                         int keylength))
3070         {
3071         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3072         }
3073
3074 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3075                                                 int keylength))
3076         {
3077         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3078         }
3079 #endif
3080
3081 #ifndef OPENSSL_NO_ECDH
3082 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3083                                                                 int keylength))
3084         {
3085         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3086         }
3087
3088 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3089                                                         int keylength))
3090         {
3091         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3092         }
3093 #endif
3094
3095 #ifndef OPENSSL_NO_PSK
3096 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3097         {
3098         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3099                 {
3100                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3101                 return 0;
3102                 }
3103         if (ctx->psk_identity_hint != NULL)
3104                 OPENSSL_free(ctx->psk_identity_hint);
3105         if (identity_hint != NULL)
3106                 {
3107                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3108                 if (ctx->psk_identity_hint == NULL)
3109                         return 0;
3110                 }
3111         else
3112                 ctx->psk_identity_hint = NULL;
3113         return 1;
3114         }
3115
3116 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3117         {
3118         if (s == NULL)
3119                 return 0;
3120
3121         if (s->session == NULL)
3122                 return 1; /* session not created yet, ignored */
3123
3124         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3125                 {
3126                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3127                 return 0;
3128                 }
3129         if (s->session->psk_identity_hint != NULL)
3130                 OPENSSL_free(s->session->psk_identity_hint);
3131         if (identity_hint != NULL)
3132                 {
3133                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3134                 if (s->session->psk_identity_hint == NULL)
3135                         return 0;
3136                 }
3137         else
3138                 s->session->psk_identity_hint = NULL;
3139         return 1;
3140         }
3141
3142 const char *SSL_get_psk_identity_hint(const SSL *s)
3143         {
3144         if (s == NULL || s->session == NULL)
3145                 return NULL;
3146         return(s->session->psk_identity_hint);
3147         }
3148
3149 const char *SSL_get_psk_identity(const SSL *s)
3150         {
3151         if (s == NULL || s->session == NULL)
3152                 return NULL;
3153         return(s->session->psk_identity);
3154         }
3155
3156 void SSL_set_psk_client_callback(SSL *s,
3157     unsigned int (*cb)(SSL *ssl, const char *hint,
3158                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3159                        unsigned int max_psk_len))
3160         {
3161         s->psk_client_callback = cb;
3162         }
3163
3164 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3165     unsigned int (*cb)(SSL *ssl, const char *hint,
3166                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3167                        unsigned int max_psk_len))
3168         {
3169         ctx->psk_client_callback = cb;
3170         }
3171
3172 void SSL_set_psk_server_callback(SSL *s,
3173     unsigned int (*cb)(SSL *ssl, const char *identity,
3174                        unsigned char *psk, unsigned int max_psk_len))
3175         {
3176         s->psk_server_callback = cb;
3177         }
3178
3179 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3180     unsigned int (*cb)(SSL *ssl, const char *identity,
3181                        unsigned char *psk, unsigned int max_psk_len))
3182         {
3183         ctx->psk_server_callback = cb;
3184         }
3185 #endif
3186
3187 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))
3188         {
3189         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3190         }
3191 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))
3192         {
3193         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3194         }
3195
3196 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3197         int (*cb)(SSL *ssl, int is_forward_secure))
3198         {
3199         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3200                 (void (*)(void))cb);
3201         }
3202 void SSL_set_not_resumable_session_callback(SSL *ssl,
3203         int (*cb)(SSL *ssl, int is_forward_secure))
3204         {
3205         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3206                 (void (*)(void))cb);
3207         }
3208
3209 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3210  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3211  * any. If EVP_MD pointer is passed, initializes ctx with this md
3212  * Returns newly allocated ctx;
3213  */
3214
3215 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3216 {
3217         ssl_clear_hash_ctx(hash);
3218         *hash = EVP_MD_CTX_create();
3219         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3220         return *hash;
3221 }
3222 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3223 {
3224
3225         if (*hash) EVP_MD_CTX_destroy(*hash);
3226         *hash=NULL;
3227 }
3228
3229 void SSL_set_debug(SSL *s, int debug)
3230         {
3231         s->debug = debug;
3232         }
3233
3234 int SSL_cache_hit(SSL *s)
3235         {
3236         return s->hit;
3237         }
3238
3239 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3240 #include "../crypto/bio/bss_file.c"
3241 #endif
3242
3243 IMPLEMENT_STACK_OF(SSL_CIPHER)
3244 IMPLEMENT_STACK_OF(SSL_COMP)
3245 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3246                                     ssl_cipher_id);