ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function,
 180         (int (*)(SSL *, unsigned char *, size_t, const char *,
 181                  size_t, const unsigned char *, size_t,
 182                  int use_context)) ssl_undefined_function,
 183         };
 184
 185 int SSL_clear(SSL *s)
 186         {
 187
 188         if (s->method == NULL)
 189                 {
 190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 191                 return(0);
 192                 }
 193
 194         if (ssl_clear_bad_session(s))
 195                 {
 196                 SSL_SESSION_free(s->session);
 197                 s->session=NULL;
 198                 }
 199
 200         s->error=0;
 201         s->hit=0;
 202         s->shutdown=0;
 203
 204 #if 0 /* Disabled since version 1.10 of this file (early return not
 205        * needed because SSL_clear is not called when doing renegotiation) */
 206         /* This is set if we are doing dynamic renegotiation so keep
 207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 208         if (s->renegotiate) return(1);
 209 #else
 210         if (s->renegotiate)
 211                 {
 212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 213                 return 0;
 214                 }
 215 #endif
 216
 217         s->type=0;
 218
 219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 220
 221         s->version=s->method->version;
 222         s->client_version=s->version;
 223         s->rwstate=SSL_NOTHING;
 224         s->rstate=SSL_ST_READ_HEADER;
 225 #if 0
 226         s->read_ahead=s->ctx->read_ahead;
 227 #endif
 228
 229         if (s->init_buf != NULL)
 230                 {
 231                 BUF_MEM_free(s->init_buf);
 232                 s->init_buf=NULL;
 233                 }
 234
 235         ssl_clear_cipher_ctx(s);
 236         ssl_clear_hash_ctx(&s->read_hash);
 237         ssl_clear_hash_ctx(&s->write_hash);
 238
 239         s->first_packet=0;
 240
 241 #if 1
 242         /* Check to see if we were changed into a different method, if
 243          * so, revert back if we are not doing session-id reuse. */
 244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 245                 {
 246                 s->method->ssl_free(s);
 247                 s->method=s->ctx->method;
 248                 if (!s->method->ssl_new(s))
 249                         return(0);
 250                 }
 251         else
 252 #endif
 253                 s->method->ssl_clear(s);
 254         return(1);
 255         }
 256
 257 /** Used to change an SSL_CTXs default SSL method type */
 258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 259         {
 260         STACK_OF(SSL_CIPHER) *sk;
 261
 262         ctx->method=meth;
 263
 264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 265                 &(ctx->cipher_list_by_id),
 266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 268                 {
 269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274
 275 SSL *SSL_new(SSL_CTX *ctx)
 276         {
 277         SSL *s;
 278
 279         if (ctx == NULL)
 280                 {
 281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 282                 return(NULL);
 283                 }
 284         if (ctx->method == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 287                 return(NULL);
 288                 }
 289
 290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 291         if (s == NULL) goto err;
 292         memset(s,0,sizeof(SSL));
 293
 294 #ifndef OPENSSL_NO_KRB5
 295         s->kssl_ctx = kssl_ctx_new();
 296 #endif  /* OPENSSL_NO_KRB5 */
 297
 298         s->options=ctx->options;
 299         s->mode=ctx->mode;
 300         s->max_cert_list=ctx->max_cert_list;
 301
 302         if (ctx->cert != NULL)
 303                 {
 304                 /* Earlier library versions used to copy the pointer to
 305                  * the CERT, not its contents; only when setting new
 306                  * parameters for the per-SSL copy, ssl_cert_new would be
 307                  * called (and the direct reference to the per-SSL_CTX
 308                  * settings would be lost, but those still were indirectly
 309                  * accessed for various purposes, and for that reason they
 310                  * used to be known as s->ctx->default_cert).
 311                  * Now we don't look at the SSL_CTX's CERT after having
 312                  * duplicated it once. */
 313
 314                 s->cert = ssl_cert_dup(ctx->cert);
 315                 if (s->cert == NULL)
 316                         goto err;
 317                 }
 318         else
 319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 320
 321         s->read_ahead=ctx->read_ahead;
 322         s->msg_callback=ctx->msg_callback;
 323         s->msg_callback_arg=ctx->msg_callback_arg;
 324         s->verify_mode=ctx->verify_mode;
 325         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
 326 #if 0
 327         s->verify_depth=ctx->verify_depth;
 328 #endif
 329         s->sid_ctx_length=ctx->sid_ctx_length;
 330         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 331         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 332         s->verify_callback=ctx->default_verify_callback;
 333         s->generate_session_id=ctx->generate_session_id;
 334
 335         s->param = X509_VERIFY_PARAM_new();
 336         if (!s->param)
 337                 goto err;
 338         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 339 #if 0
 340         s->purpose = ctx->purpose;
 341         s->trust = ctx->trust;
 342 #endif
 343         s->quiet_shutdown=ctx->quiet_shutdown;
 344         s->max_send_fragment = ctx->max_send_fragment;
 345
 346         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 347         s->ctx=ctx;
 348 #ifndef OPENSSL_NO_TLSEXT
 349         s->tlsext_debug_cb = 0;
 350         s->tlsext_debug_arg = NULL;
 351         s->tlsext_ticket_expected = 0;
 352         s->tlsext_status_type = -1;
 353         s->tlsext_status_expected = 0;
 354         s->tlsext_ocsp_ids = NULL;
 355         s->tlsext_ocsp_exts = NULL;
 356         s->tlsext_ocsp_resp = NULL;
 357         s->tlsext_ocsp_resplen = -1;
 358         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 359         s->initial_ctx=ctx;
 360 #ifndef OPENSSL_NO_EC
 361         if (ctx->tlsext_ecpointformatlist)
 362                 {
 363                 s->tlsext_ecpointformatlist =
 364                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 365                                         ctx->tlsext_ecpointformatlist_length);
 366                 if (!s->tlsext_ecpointformatlist)
 367                         goto err;
 368                 s->tlsext_ecpointformatlist_length =
 369                                         ctx->tlsext_ecpointformatlist_length;
 370                 }
 371         if (ctx->tlsext_ellipticcurvelist)
 372                 {
 373                 s->tlsext_ellipticcurvelist =
 374                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 375                                         ctx->tlsext_ellipticcurvelist_length);
 376                 if (!s->tlsext_ellipticcurvelist)
 377                         goto err;
 378                 s->tlsext_ellipticcurvelist_length =
 379                                         ctx->tlsext_ellipticcurvelist_length;
 380                 }
 381 #endif
 382 # ifndef OPENSSL_NO_NEXTPROTONEG
 383         s->next_proto_negotiated = NULL;
 384 # endif
 385 #endif
 386
 387         s->verify_result=X509_V_OK;
 388
 389         s->method=ctx->method;
 390
 391         if (!s->method->ssl_new(s))
 392                 goto err;
 393
 394         s->references=1;
 395         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 396
 397         SSL_clear(s);
 398
 399         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 400
 401 #ifndef OPENSSL_NO_PSK
 402         s->psk_client_callback=ctx->psk_client_callback;
 403         s->psk_server_callback=ctx->psk_server_callback;
 404 #endif
 405
 406         return(s);
 407 err:
 408         if (s != NULL)
 409                 {
 410                 if (s->cert != NULL)
 411                         ssl_cert_free(s->cert);
 412                 if (s->ctx != NULL)
 413                         SSL_CTX_free(s->ctx); /* decrement reference count */
 414                 OPENSSL_free(s);
 415                 }
 416         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 417         return(NULL);
 418         }
 419
 420 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 421                                    unsigned int sid_ctx_len)
 422     {
 423     if(sid_ctx_len > sizeof ctx->sid_ctx)
 424         {
 425         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 426         return 0;
 427         }
 428     ctx->sid_ctx_length=sid_ctx_len;
 429     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 430
 431     return 1;
 432     }
 433
 434 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 435                                unsigned int sid_ctx_len)
 436     {
 437     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 438         {
 439         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 440         return 0;
 441         }
 442     ssl->sid_ctx_length=sid_ctx_len;
 443     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 444
 445     return 1;
 446     }
 447
 448 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 449         {
 450         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 451         ctx->generate_session_id = cb;
 452         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 453         return 1;
 454         }
 455
 456 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 457         {
 458         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 459         ssl->generate_session_id = cb;
 460         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 461         return 1;
 462         }
 463
 464 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 465                                 unsigned int id_len)
 466         {
 467         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 468          * we can "construct" a session to give us the desired check - ie. to
 469          * find if there's a session in the hash table that would conflict with
 470          * any new session built out of this id/id_len and the ssl_version in
 471          * use by this SSL. */
 472         SSL_SESSION r, *p;
 473
 474         if(id_len > sizeof r.session_id)
 475                 return 0;
 476
 477         r.ssl_version = ssl->version;
 478         r.session_id_length = id_len;
 479         memcpy(r.session_id, id, id_len);
 480         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 481          * callback is calling us to check the uniqueness of a shorter ID, it
 482          * must be compared as a padded-out ID because that is what it will be
 483          * converted to when the callback has finished choosing it. */
 484         if((r.ssl_version == SSL2_VERSION) &&
 485                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 486                 {
 487                 memset(r.session_id + id_len, 0,
 488                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 489                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 490                 }
 491
 492         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 493         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 494         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 495         return (p != NULL);
 496         }
 497
 498 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 499         {
 500         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 501         }
 502
 503 int SSL_set_purpose(SSL *s, int purpose)
 504         {
 505         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 506         }
 507
 508 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 509         {
 510         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 511         }
 512
 513 int SSL_set_trust(SSL *s, int trust)
 514         {
 515         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 516         }
 517
 518 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 519         {
 520         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 521         }
 522
 523 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 524         {
 525         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 526         }
 527
 528 void SSL_certs_clear(SSL *s)
 529         {
 530         ssl_cert_clear_certs(s->cert);
 531         }
 532
 533 void SSL_free(SSL *s)
 534         {
 535         int i;
 536
 537         if(s == NULL)
 538             return;
 539
 540         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 541 #ifdef REF_PRINT
 542         REF_PRINT("SSL",s);
 543 #endif
 544         if (i > 0) return;
 545 #ifdef REF_CHECK
 546         if (i < 0)
 547                 {
 548                 fprintf(stderr,"SSL_free, bad reference count\n");
 549                 abort(); /* ok */
 550                 }
 551 #endif
 552
 553         if (s->param)
 554                 X509_VERIFY_PARAM_free(s->param);
 555
 556         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 557
 558         if (s->bbio != NULL)
 559                 {
 560                 /* If the buffering BIO is in place, pop it off */
 561                 if (s->bbio == s->wbio)
 562                         {
 563                         s->wbio=BIO_pop(s->wbio);
 564                         }
 565                 BIO_free(s->bbio);
 566                 s->bbio=NULL;
 567                 }
 568         if (s->rbio != NULL)
 569                 BIO_free_all(s->rbio);
 570         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 571                 BIO_free_all(s->wbio);
 572
 573         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 574
 575         /* add extra stuff */
 576         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 577         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 578
 579         /* Make the next call work :-) */
 580         if (s->session != NULL)
 581                 {
 582                 ssl_clear_bad_session(s);
 583                 SSL_SESSION_free(s->session);
 584                 }
 585
 586         ssl_clear_cipher_ctx(s);
 587         ssl_clear_hash_ctx(&s->read_hash);
 588         ssl_clear_hash_ctx(&s->write_hash);
 589
 590         if (s->cert != NULL) ssl_cert_free(s->cert);
 591         /* Free up if allocated */
 592
 593 #ifndef OPENSSL_NO_TLSEXT
 594         if (s->tlsext_hostname)
 595                 OPENSSL_free(s->tlsext_hostname);
 596         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 597 #ifndef OPENSSL_NO_EC
 598         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 599         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 600 #endif /* OPENSSL_NO_EC */
 601         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 602         if (s->tlsext_ocsp_exts)
 603                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 604                                                 X509_EXTENSION_free);
 605         if (s->tlsext_ocsp_ids)
 606                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 607         if (s->tlsext_ocsp_resp)
 608                 OPENSSL_free(s->tlsext_ocsp_resp);
 609 #endif
 610
 611         if (s->client_CA != NULL)
 612                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 613
 614         if (s->method != NULL) s->method->ssl_free(s);
 615
 616         if (s->ctx) SSL_CTX_free(s->ctx);
 617
 618 #ifndef OPENSSL_NO_KRB5
 619         if (s->kssl_ctx != NULL)
 620                 kssl_ctx_free(s->kssl_ctx);
 621 #endif  /* OPENSSL_NO_KRB5 */
 622
 623 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 624         if (s->next_proto_negotiated)
 625                 OPENSSL_free(s->next_proto_negotiated);
 626 #endif
 627
 628         if (s->srtp_profiles)
 629             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 630
 631         OPENSSL_free(s);
 632         }
 633
 634 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 635         {
 636         /* If the output buffering BIO is still in place, remove it
 637          */
 638         if (s->bbio != NULL)
 639                 {
 640                 if (s->wbio == s->bbio)
 641                         {
 642                         s->wbio=s->wbio->next_bio;
 643                         s->bbio->next_bio=NULL;
 644                         }
 645                 }
 646         if ((s->rbio != NULL) && (s->rbio != rbio))
 647                 BIO_free_all(s->rbio);
 648         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 649                 BIO_free_all(s->wbio);
 650         s->rbio=rbio;
 651         s->wbio=wbio;
 652         }
 653
 654 BIO *SSL_get_rbio(const SSL *s)
 655         { return(s->rbio); }
 656
 657 BIO *SSL_get_wbio(const SSL *s)
 658         { return(s->wbio); }
 659
 660 int SSL_get_fd(const SSL *s)
 661         {
 662         return(SSL_get_rfd(s));
 663         }
 664
 665 int SSL_get_rfd(const SSL *s)
 666         {
 667         int ret= -1;
 668         BIO *b,*r;
 669
 670         b=SSL_get_rbio(s);
 671         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 672         if (r != NULL)
 673                 BIO_get_fd(r,&ret);
 674         return(ret);
 675         }
 676
 677 int SSL_get_wfd(const SSL *s)
 678         {
 679         int ret= -1;
 680         BIO *b,*r;
 681
 682         b=SSL_get_wbio(s);
 683         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 684         if (r != NULL)
 685                 BIO_get_fd(r,&ret);
 686         return(ret);
 687         }
 688
 689 #ifndef OPENSSL_NO_SOCK
 690 int SSL_set_fd(SSL *s,int fd)
 691         {
 692         int ret=0;
 693         BIO *bio=NULL;
 694
 695         bio=BIO_new(BIO_s_socket());
 696
 697         if (bio == NULL)
 698                 {
 699                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 700                 goto err;
 701                 }
 702         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 703         SSL_set_bio(s,bio,bio);
 704         ret=1;
 705 err:
 706         return(ret);
 707         }
 708
 709 int SSL_set_wfd(SSL *s,int fd)
 710         {
 711         int ret=0;
 712         BIO *bio=NULL;
 713
 714         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 715                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 716                 {
 717                 bio=BIO_new(BIO_s_socket());
 718
 719                 if (bio == NULL)
 720                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 721                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 722                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 723                 }
 724         else
 725                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 726         ret=1;
 727 err:
 728         return(ret);
 729         }
 730
 731 int SSL_set_rfd(SSL *s,int fd)
 732         {
 733         int ret=0;
 734         BIO *bio=NULL;
 735
 736         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 737                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 738                 {
 739                 bio=BIO_new(BIO_s_socket());
 740
 741                 if (bio == NULL)
 742                         {
 743                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 744                         goto err;
 745                         }
 746                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 747                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 748                 }
 749         else
 750                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 751         ret=1;
 752 err:
 753         return(ret);
 754         }
 755 #endif
 756
 757
 758 /* return length of latest Finished message we sent, copy to 'buf' */
 759 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 760         {
 761         size_t ret = 0;
 762
 763         if (s->s3 != NULL)
 764                 {
 765                 ret = s->s3->tmp.finish_md_len;
 766                 if (count > ret)
 767                         count = ret;
 768                 memcpy(buf, s->s3->tmp.finish_md, count);
 769                 }
 770         return ret;
 771         }
 772
 773 /* return length of latest Finished message we expected, copy to 'buf' */
 774 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 775         {
 776         size_t ret = 0;
 777
 778         if (s->s3 != NULL)
 779                 {
 780                 ret = s->s3->tmp.peer_finish_md_len;
 781                 if (count > ret)
 782                         count = ret;
 783                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 784                 }
 785         return ret;
 786         }
 787
 788
 789 int SSL_get_verify_mode(const SSL *s)
 790         {
 791         return(s->verify_mode);
 792         }
 793
 794 int SSL_get_verify_depth(const SSL *s)
 795         {
 796         return X509_VERIFY_PARAM_get_depth(s->param);
 797         }
 798
 799 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 800         {
 801         return(s->verify_callback);
 802         }
 803
 804 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 805         {
 806         return(ctx->verify_mode);
 807         }
 808
 809 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 810         {
 811         return X509_VERIFY_PARAM_get_depth(ctx->param);
 812         }
 813
 814 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 815         {
 816         return(ctx->default_verify_callback);
 817         }
 818
 819 void SSL_set_verify(SSL *s,int mode,
 820                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 821         {
 822         s->verify_mode=mode;
 823         if (callback != NULL)
 824                 s->verify_callback=callback;
 825         }
 826
 827 void SSL_set_verify_depth(SSL *s,int depth)
 828         {
 829         X509_VERIFY_PARAM_set_depth(s->param, depth);
 830         }
 831
 832 void SSL_set_read_ahead(SSL *s,int yes)
 833         {
 834         s->read_ahead=yes;
 835         }
 836
 837 int SSL_get_read_ahead(const SSL *s)
 838         {
 839         return(s->read_ahead);
 840         }
 841
 842 int SSL_pending(const SSL *s)
 843         {
 844         /* SSL_pending cannot work properly if read-ahead is enabled
 845          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 846          * and it is impossible to fix since SSL_pending cannot report
 847          * errors that may be observed while scanning the new data.
 848          * (Note that SSL_pending() is often used as a boolean value,
 849          * so we'd better not return -1.)
 850          */
 851         return(s->method->ssl_pending(s));
 852         }
 853
 854 X509 *SSL_get_peer_certificate(const SSL *s)
 855         {
 856         X509 *r;
 857
 858         if ((s == NULL) || (s->session == NULL))
 859                 r=NULL;
 860         else
 861                 r=s->session->peer;
 862
 863         if (r == NULL) return(r);
 864
 865         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 866
 867         return(r);
 868         }
 869
 870 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 871         {
 872         STACK_OF(X509) *r;
 873
 874         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 875                 r=NULL;
 876         else
 877                 r=s->session->sess_cert->cert_chain;
 878
 879         /* If we are a client, cert_chain includes the peer's own
 880          * certificate; if we are a server, it does not. */
 881
 882         return(r);
 883         }
 884
 885 /* Now in theory, since the calling process own 't' it should be safe to
 886  * modify.  We need to be able to read f without being hassled */
 887 void SSL_copy_session_id(SSL *t,const SSL *f)
 888         {
 889         CERT *tmp;
 890
 891         /* Do we need to to SSL locking? */
 892         SSL_set_session(t,SSL_get_session(f));
 893
 894         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 895          * vice-versa */
 896         if (t->method != f->method)
 897                 {
 898                 t->method->ssl_free(t); /* cleanup current */
 899                 t->method=f->method;    /* change method */
 900                 t->method->ssl_new(t);  /* setup new */
 901                 }
 902
 903         tmp=t->cert;
 904         if (f->cert != NULL)
 905                 {
 906                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 907                 t->cert=f->cert;
 908                 }
 909         else
 910                 t->cert=NULL;
 911         if (tmp != NULL) ssl_cert_free(tmp);
 912         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 913         }
 914
 915 /* Fix this so it checks all the valid key/cert options */
 916 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 917         {
 918         if (    (ctx == NULL) ||
 919                 (ctx->cert == NULL) ||
 920                 (ctx->cert->key->x509 == NULL))
 921                 {
 922                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 923                 return(0);
 924                 }
 925         if      (ctx->cert->key->privatekey == NULL)
 926                 {
 927                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 928                 return(0);
 929                 }
 930         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 931         }
 932
 933 /* Fix this function so that it takes an optional type parameter */
 934 int SSL_check_private_key(const SSL *ssl)
 935         {
 936         if (ssl == NULL)
 937                 {
 938                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 939                 return(0);
 940                 }
 941         if (ssl->cert == NULL)
 942                 {
 943                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 944                 return 0;
 945                 }
 946         if (ssl->cert->key->x509 == NULL)
 947                 {
 948                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 949                 return(0);
 950                 }
 951         if (ssl->cert->key->privatekey == NULL)
 952                 {
 953                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 954                 return(0);
 955                 }
 956         return(X509_check_private_key(ssl->cert->key->x509,
 957                 ssl->cert->key->privatekey));
 958         }
 959
 960 int SSL_accept(SSL *s)
 961         {
 962         if (s->handshake_func == 0)
 963                 /* Not properly initialized yet */
 964                 SSL_set_accept_state(s);
 965
 966         return(s->method->ssl_accept(s));
 967         }
 968
 969 int SSL_connect(SSL *s)
 970         {
 971         if (s->handshake_func == 0)
 972                 /* Not properly initialized yet */
 973                 SSL_set_connect_state(s);
 974
 975         return(s->method->ssl_connect(s));
 976         }
 977
 978 long SSL_get_default_timeout(const SSL *s)
 979         {
 980         return(s->method->get_timeout());
 981         }
 982
 983 int SSL_read(SSL *s,void *buf,int num)
 984         {
 985         if (s->handshake_func == 0)
 986                 {
 987                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 988                 return -1;
 989                 }
 990
 991         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 992                 {
 993                 s->rwstate=SSL_NOTHING;
 994                 return(0);
 995                 }
 996         return(s->method->ssl_read(s,buf,num));
 997         }
 998
 999 int SSL_peek(SSL *s,void *buf,int num)
1000         {
1001         if (s->handshake_func == 0)
1002                 {
1003                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1004                 return -1;
1005                 }
1006
1007         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1008                 {
1009                 return(0);
1010                 }
1011         return(s->method->ssl_peek(s,buf,num));
1012         }
1013
1014 int SSL_write(SSL *s,const void *buf,int num)
1015         {
1016         if (s->handshake_func == 0)
1017                 {
1018                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1019                 return -1;
1020                 }
1021
1022         if (s->shutdown & SSL_SENT_SHUTDOWN)
1023                 {
1024                 s->rwstate=SSL_NOTHING;
1025                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1026                 return(-1);
1027                 }
1028         return(s->method->ssl_write(s,buf,num));
1029         }
1030
1031 int SSL_shutdown(SSL *s)
1032         {
1033         /* Note that this function behaves differently from what one might
1034          * expect.  Return values are 0 for no success (yet),
1035          * 1 for success; but calling it once is usually not enough,
1036          * even if blocking I/O is used (see ssl3_shutdown).
1037          */
1038
1039         if (s->handshake_func == 0)
1040                 {
1041                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1042                 return -1;
1043                 }
1044
1045         if ((s != NULL) && !SSL_in_init(s))
1046                 return(s->method->ssl_shutdown(s));
1047         else
1048                 return(1);
1049         }
1050
1051 int SSL_renegotiate(SSL *s)
1052         {
1053         if (s->renegotiate == 0)
1054                 s->renegotiate=1;
1055
1056         s->new_session=1;
1057
1058         return(s->method->ssl_renegotiate(s));
1059         }
1060
1061 int SSL_renegotiate_abbreviated(SSL *s)
1062         {
1063         if (s->renegotiate == 0)
1064                 s->renegotiate=1;
1065
1066         s->new_session=0;
1067
1068         return(s->method->ssl_renegotiate(s));
1069         }
1070
1071 int SSL_renegotiate_pending(SSL *s)
1072         {
1073         /* becomes true when negotiation is requested;
1074          * false again once a handshake has finished */
1075         return (s->renegotiate != 0);
1076         }
1077
1078 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1079         {
1080         long l;
1081
1082         switch (cmd)
1083                 {
1084         case SSL_CTRL_GET_READ_AHEAD:
1085                 return(s->read_ahead);
1086         case SSL_CTRL_SET_READ_AHEAD:
1087                 l=s->read_ahead;
1088                 s->read_ahead=larg;
1089                 return(l);
1090
1091         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1092                 s->msg_callback_arg = parg;
1093                 return 1;
1094
1095         case SSL_CTRL_OPTIONS:
1096                 return(s->options|=larg);
1097         case SSL_CTRL_CLEAR_OPTIONS:
1098                 return(s->options&=~larg);
1099         case SSL_CTRL_MODE:
1100                 return(s->mode|=larg);
1101         case SSL_CTRL_CLEAR_MODE:
1102                 return(s->mode &=~larg);
1103         case SSL_CTRL_GET_MAX_CERT_LIST:
1104                 return(s->max_cert_list);
1105         case SSL_CTRL_SET_MAX_CERT_LIST:
1106                 l=s->max_cert_list;
1107                 s->max_cert_list=larg;
1108                 return(l);
1109         case SSL_CTRL_SET_MTU:
1110 #ifndef OPENSSL_NO_DTLS1
1111                 if (larg < (long)dtls1_min_mtu())
1112                         return 0;
1113 #endif
1114
1115                 if (SSL_version(s) == DTLS1_VERSION ||
1116                     SSL_version(s) == DTLS1_BAD_VER)
1117                         {
1118                         s->d1->mtu = larg;
1119                         return larg;
1120                         }
1121                 return 0;
1122         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1123                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1124                         return 0;
1125                 s->max_send_fragment = larg;
1126                 return 1;
1127         case SSL_CTRL_GET_RI_SUPPORT:
1128                 if (s->s3)
1129                         return s->s3->send_connection_binding;
1130                 else return 0;
1131         default:
1132                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1133                 }
1134         }
1135
1136 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1137         {
1138         switch(cmd)
1139                 {
1140         case SSL_CTRL_SET_MSG_CALLBACK:
1141                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1142                 return 1;
1143
1144         default:
1145                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1146                 }
1147         }
1148
1149 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1150         {
1151         return ctx->sessions;
1152         }
1153
1154 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1155         {
1156         long l;
1157
1158         switch (cmd)
1159                 {
1160         case SSL_CTRL_GET_READ_AHEAD:
1161                 return(ctx->read_ahead);
1162         case SSL_CTRL_SET_READ_AHEAD:
1163                 l=ctx->read_ahead;
1164                 ctx->read_ahead=larg;
1165                 return(l);
1166
1167         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1168                 ctx->msg_callback_arg = parg;
1169                 return 1;
1170
1171         case SSL_CTRL_GET_MAX_CERT_LIST:
1172                 return(ctx->max_cert_list);
1173         case SSL_CTRL_SET_MAX_CERT_LIST:
1174                 l=ctx->max_cert_list;
1175                 ctx->max_cert_list=larg;
1176                 return(l);
1177
1178         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1179                 l=ctx->session_cache_size;
1180                 ctx->session_cache_size=larg;
1181                 return(l);
1182         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1183                 return(ctx->session_cache_size);
1184         case SSL_CTRL_SET_SESS_CACHE_MODE:
1185                 l=ctx->session_cache_mode;
1186                 ctx->session_cache_mode=larg;
1187                 return(l);
1188         case SSL_CTRL_GET_SESS_CACHE_MODE:
1189                 return(ctx->session_cache_mode);
1190
1191         case SSL_CTRL_SESS_NUMBER:
1192                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1193         case SSL_CTRL_SESS_CONNECT:
1194                 return(ctx->stats.sess_connect);
1195         case SSL_CTRL_SESS_CONNECT_GOOD:
1196                 return(ctx->stats.sess_connect_good);
1197         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1198                 return(ctx->stats.sess_connect_renegotiate);
1199         case SSL_CTRL_SESS_ACCEPT:
1200                 return(ctx->stats.sess_accept);
1201         case SSL_CTRL_SESS_ACCEPT_GOOD:
1202                 return(ctx->stats.sess_accept_good);
1203         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1204                 return(ctx->stats.sess_accept_renegotiate);
1205         case SSL_CTRL_SESS_HIT:
1206                 return(ctx->stats.sess_hit);
1207         case SSL_CTRL_SESS_CB_HIT:
1208                 return(ctx->stats.sess_cb_hit);
1209         case SSL_CTRL_SESS_MISSES:
1210                 return(ctx->stats.sess_miss);
1211         case SSL_CTRL_SESS_TIMEOUTS:
1212                 return(ctx->stats.sess_timeout);
1213         case SSL_CTRL_SESS_CACHE_FULL:
1214                 return(ctx->stats.sess_cache_full);
1215         case SSL_CTRL_OPTIONS:
1216                 return(ctx->options|=larg);
1217         case SSL_CTRL_CLEAR_OPTIONS:
1218                 return(ctx->options&=~larg);
1219         case SSL_CTRL_MODE:
1220                 return(ctx->mode|=larg);
1221         case SSL_CTRL_CLEAR_MODE:
1222                 return(ctx->mode&=~larg);
1223         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1224                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1225                         return 0;
1226                 ctx->max_send_fragment = larg;
1227                 return 1;
1228         default:
1229                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1230                 }
1231         }
1232
1233 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1234         {
1235         switch(cmd)
1236                 {
1237         case SSL_CTRL_SET_MSG_CALLBACK:
1238                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1239                 return 1;
1240
1241         default:
1242                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1243                 }
1244         }
1245
1246 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1247         {
1248         long l;
1249
1250         l=a->id-b->id;
1251         if (l == 0L)
1252                 return(0);
1253         else
1254                 return((l > 0)?1:-1);
1255         }
1256
1257 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1258                         const SSL_CIPHER * const *bp)
1259         {
1260         long l;
1261
1262         l=(*ap)->id-(*bp)->id;
1263         if (l == 0L)
1264                 return(0);
1265         else
1266                 return((l > 0)?1:-1);
1267         }
1268
1269 /** return a STACK of the ciphers available for the SSL and in order of
1270  * preference */
1271 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1272         {
1273         if (s != NULL)
1274                 {
1275                 if (s->cipher_list != NULL)
1276                         {
1277                         return(s->cipher_list);
1278                         }
1279                 else if ((s->ctx != NULL) &&
1280                         (s->ctx->cipher_list != NULL))
1281                         {
1282                         return(s->ctx->cipher_list);
1283                         }
1284                 }
1285         return(NULL);
1286         }
1287
1288 /** return a STACK of the ciphers available for the SSL and in order of
1289  * algorithm id */
1290 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1291         {
1292         if (s != NULL)
1293                 {
1294                 if (s->cipher_list_by_id != NULL)
1295                         {
1296                         return(s->cipher_list_by_id);
1297                         }
1298                 else if ((s->ctx != NULL) &&
1299                         (s->ctx->cipher_list_by_id != NULL))
1300                         {
1301                         return(s->ctx->cipher_list_by_id);
1302                         }
1303                 }
1304         return(NULL);
1305         }
1306
1307 /** The old interface to get the same thing as SSL_get_ciphers() */
1308 const char *SSL_get_cipher_list(const SSL *s,int n)
1309         {
1310         SSL_CIPHER *c;
1311         STACK_OF(SSL_CIPHER) *sk;
1312
1313         if (s == NULL) return(NULL);
1314         sk=SSL_get_ciphers(s);
1315         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1316                 return(NULL);
1317         c=sk_SSL_CIPHER_value(sk,n);
1318         if (c == NULL) return(NULL);
1319         return(c->name);
1320         }
1321
1322 /** specify the ciphers to be used by default by the SSL_CTX */
1323 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1324         {
1325         STACK_OF(SSL_CIPHER) *sk;
1326
1327         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1328                 &ctx->cipher_list_by_id,str);
1329         /* ssl_create_cipher_list may return an empty stack if it
1330          * was unable to find a cipher matching the given rule string
1331          * (for example if the rule string specifies a cipher which
1332          * has been disabled). This is not an error as far as
1333          * ssl_create_cipher_list is concerned, and hence
1334          * ctx->cipher_list and ctx->cipher_list_by_id has been
1335          * updated. */
1336         if (sk == NULL)
1337                 return 0;
1338         else if (sk_SSL_CIPHER_num(sk) == 0)
1339                 {
1340                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1341                 return 0;
1342                 }
1343         return 1;
1344         }
1345
1346 /** specify the ciphers to be used by the SSL */
1347 int SSL_set_cipher_list(SSL *s,const char *str)
1348         {
1349         STACK_OF(SSL_CIPHER) *sk;
1350
1351         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1352                 &s->cipher_list_by_id,str);
1353         /* see comment in SSL_CTX_set_cipher_list */
1354         if (sk == NULL)
1355                 return 0;
1356         else if (sk_SSL_CIPHER_num(sk) == 0)
1357                 {
1358                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1359                 return 0;
1360                 }
1361         return 1;
1362         }
1363
1364 /* works well for SSLv2, not so good for SSLv3 */
1365 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1366         {
1367         char *p;
1368         STACK_OF(SSL_CIPHER) *sk;
1369         SSL_CIPHER *c;
1370         int i;
1371
1372         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1373                 (len < 2))
1374                 return(NULL);
1375
1376         p=buf;
1377         sk=s->session->ciphers;
1378         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1379                 {
1380                 int n;
1381
1382                 c=sk_SSL_CIPHER_value(sk,i);
1383                 n=strlen(c->name);
1384                 if (n+1 > len)
1385                         {
1386                         if (p != buf)
1387                                 --p;
1388                         *p='\0';
1389                         return buf;
1390                         }
1391                 strcpy(p,c->name);
1392                 p+=n;
1393                 *(p++)=':';
1394                 len-=n+1;
1395                 }
1396         p[-1]='\0';
1397         return(buf);
1398         }
1399
1400 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1401                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1402         {
1403         int i,j=0;
1404         SSL_CIPHER *c;
1405         unsigned char *q;
1406 #ifndef OPENSSL_NO_KRB5
1407         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1408 #endif /* OPENSSL_NO_KRB5 */
1409
1410         if (sk == NULL) return(0);
1411         q=p;
1412
1413         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1414                 {
1415                 c=sk_SSL_CIPHER_value(sk,i);
1416                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1417                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1418                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1419                         continue;
1420 #ifndef OPENSSL_NO_KRB5
1421                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1422                     nokrb5)
1423                     continue;
1424 #endif /* OPENSSL_NO_KRB5 */
1425 #ifndef OPENSSL_NO_PSK
1426                 /* with PSK there must be client callback set */
1427                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1428                     s->psk_client_callback == NULL)
1429                         continue;
1430 #endif /* OPENSSL_NO_PSK */
1431                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1432                 p+=j;
1433                 }
1434         /* If p == q, no ciphers and caller indicates an error. Otherwise
1435          * add SCSV if not renegotiating.
1436          */
1437         if (p != q && !s->renegotiate)
1438                 {
1439                 static SSL_CIPHER scsv =
1440                         {
1441                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1442                         };
1443                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1444                 p+=j;
1445 #ifdef OPENSSL_RI_DEBUG
1446                 fprintf(stderr, "SCSV sent by client\n");
1447 #endif
1448                 }
1449
1450         return(p-q);
1451         }
1452
1453 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1454                                                STACK_OF(SSL_CIPHER) **skp)
1455         {
1456         const SSL_CIPHER *c;
1457         STACK_OF(SSL_CIPHER) *sk;
1458         int i,n;
1459         if (s->s3)
1460                 s->s3->send_connection_binding = 0;
1461
1462         n=ssl_put_cipher_by_char(s,NULL,NULL);
1463         if ((num%n) != 0)
1464                 {
1465                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1466                 return(NULL);
1467                 }
1468         if ((skp == NULL) || (*skp == NULL))
1469                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1470         else
1471                 {
1472                 sk= *skp;
1473                 sk_SSL_CIPHER_zero(sk);
1474                 }
1475
1476         for (i=0; i<num; i+=n)
1477                 {
1478                 /* Check for SCSV */
1479                 if (s->s3 && (n != 3 || !p[0]) &&
1480                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1481                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1482                         {
1483                         /* SCSV fatal if renegotiating */
1484                         if (s->renegotiate)
1485                                 {
1486                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1487                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1488                                 goto err;
1489                                 }
1490                         s->s3->send_connection_binding = 1;
1491                         p += n;
1492 #ifdef OPENSSL_RI_DEBUG
1493                         fprintf(stderr, "SCSV received by server\n");
1494 #endif
1495                         continue;
1496                         }
1497
1498                 c=ssl_get_cipher_by_char(s,p);
1499                 p+=n;
1500                 if (c != NULL)
1501                         {
1502                         if (!sk_SSL_CIPHER_push(sk,c))
1503                                 {
1504                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1505                                 goto err;
1506                                 }
1507                         }
1508                 }
1509
1510         if (skp != NULL)
1511                 *skp=sk;
1512         return(sk);
1513 err:
1514         if ((skp == NULL) || (*skp == NULL))
1515                 sk_SSL_CIPHER_free(sk);
1516         return(NULL);
1517         }
1518
1519
1520 #ifndef OPENSSL_NO_TLSEXT
1521 /** return a servername extension value if provided in Client Hello, or NULL.
1522  * So far, only host_name types are defined (RFC 3546).
1523  */
1524
1525 const char *SSL_get_servername(const SSL *s, const int type)
1526         {
1527         if (type != TLSEXT_NAMETYPE_host_name)
1528                 return NULL;
1529
1530         return s->session && !s->tlsext_hostname ?
1531                 s->session->tlsext_hostname :
1532                 s->tlsext_hostname;
1533         }
1534
1535 int SSL_get_servername_type(const SSL *s)
1536         {
1537         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1538                 return TLSEXT_NAMETYPE_host_name;
1539         return -1;
1540         }
1541
1542 # ifndef OPENSSL_NO_NEXTPROTONEG
1543 /* SSL_select_next_proto implements the standard protocol selection. It is
1544  * expected that this function is called from the callback set by
1545  * SSL_CTX_set_next_proto_select_cb.
1546  *
1547  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1548  * strings. The length byte itself is not included in the length. A byte
1549  * string of length 0 is invalid. No byte string may be truncated.
1550  *
1551  * The current, but experimental algorithm for selecting the protocol is:
1552  *
1553  * 1) If the server doesn't support NPN then this is indicated to the
1554  * callback. In this case, the client application has to abort the connection
1555  * or have a default application level protocol.
1556  *
1557  * 2) If the server supports NPN, but advertises an empty list then the
1558  * client selects the first protcol in its list, but indicates via the
1559  * API that this fallback case was enacted.
1560  *
1561  * 3) Otherwise, the client finds the first protocol in the server's list
1562  * that it supports and selects this protocol. This is because it's
1563  * assumed that the server has better information about which protocol
1564  * a client should use.
1565  *
1566  * 4) If the client doesn't support any of the server's advertised
1567  * protocols, then this is treated the same as case 2.
1568  *
1569  * It returns either
1570  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1571  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1572  */
1573 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)
1574         {
1575         unsigned int i, j;
1576         const unsigned char *result;
1577         int status = OPENSSL_NPN_UNSUPPORTED;
1578
1579         /* For each protocol in server preference order, see if we support it. */
1580         for (i = 0; i < server_len; )
1581                 {
1582                 for (j = 0; j < client_len; )
1583                         {
1584                         if (server[i] == client[j] &&
1585                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1586                                 {
1587                                 /* We found a match */
1588                                 result = &server[i];
1589                                 status = OPENSSL_NPN_NEGOTIATED;
1590                                 goto found;
1591                                 }
1592                         j += client[j];
1593                         j++;
1594                         }
1595                 i += server[i];
1596                 i++;
1597                 }
1598
1599         /* There's no overlap between our protocols and the server's list. */
1600         result = client;
1601         status = OPENSSL_NPN_NO_OVERLAP;
1602
1603         found:
1604         *out = (unsigned char *) result + 1;
1605         *outlen = result[0];
1606         return status;
1607         }
1608
1609 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1610  * requested protocol for this connection and returns 0. If the client didn't
1611  * request any protocol, then *data is set to NULL.
1612  *
1613  * Note that the client can request any protocol it chooses. The value returned
1614  * from this function need not be a member of the list of supported protocols
1615  * provided by the callback.
1616  */
1617 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1618         {
1619         *data = s->next_proto_negotiated;
1620         if (!*data) {
1621                 *len = 0;
1622         } else {
1623                 *len = s->next_proto_negotiated_len;
1624         }
1625 }
1626
1627 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1628  * TLS server needs a list of supported protocols for Next Protocol
1629  * Negotiation. The returned list must be in wire format.  The list is returned
1630  * by setting |out| to point to it and |outlen| to its length. This memory will
1631  * not be modified, but one should assume that the SSL* keeps a reference to
1632  * it.
1633  *
1634  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1635  * such extension will be included in the ServerHello. */
1636 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)
1637         {
1638         ctx->next_protos_advertised_cb = cb;
1639         ctx->next_protos_advertised_cb_arg = arg;
1640         }
1641
1642 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1643  * client needs to select a protocol from the server's provided list. |out|
1644  * must be set to point to the selected protocol (which may be within |in|).
1645  * The length of the protocol name must be written into |outlen|. The server's
1646  * advertised protocols are provided in |in| and |inlen|. The callback can
1647  * assume that |in| is syntactically valid.
1648  *
1649  * The client must select a protocol. It is fatal to the connection if this
1650  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1651  */
1652 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)
1653         {
1654         ctx->next_proto_select_cb = cb;
1655         ctx->next_proto_select_cb_arg = arg;
1656         }
1657 # endif
1658 #endif
1659
1660 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1661         const char *label, size_t llen, const unsigned char *p, size_t plen,
1662         int use_context)
1663         {
1664         if (s->version < TLS1_VERSION)
1665                 return -1;
1666
1667         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1668                                                            llen, p, plen,
1669                                                            use_context);
1670         }
1671
1672 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1673         {
1674         unsigned long l;
1675
1676         l=(unsigned long)
1677                 ((unsigned int) a->session_id[0]     )|
1678                 ((unsigned int) a->session_id[1]<< 8L)|
1679                 ((unsigned long)a->session_id[2]<<16L)|
1680                 ((unsigned long)a->session_id[3]<<24L);
1681         return(l);
1682         }
1683
1684 /* NB: If this function (or indeed the hash function which uses a sort of
1685  * coarser function than this one) is changed, ensure
1686  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1687  * able to construct an SSL_SESSION that will collide with any existing session
1688  * with a matching session ID. */
1689 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1690         {
1691         if (a->ssl_version != b->ssl_version)
1692                 return(1);
1693         if (a->session_id_length != b->session_id_length)
1694                 return(1);
1695         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1696         }
1697
1698 /* These wrapper functions should remain rather than redeclaring
1699  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1700  * variable. The reason is that the functions aren't static, they're exposed via
1701  * ssl.h. */
1702 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1703 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1704
1705 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1706         {
1707         SSL_CTX *ret=NULL;
1708
1709         if (meth == NULL)
1710                 {
1711                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1712                 return(NULL);
1713                 }
1714
1715 #ifdef OPENSSL_FIPS
1716         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1717                 {
1718                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1719                 return NULL;
1720                 }
1721 #endif
1722
1723         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1724                 {
1725                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1726                 goto err;
1727                 }
1728         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1729         if (ret == NULL)
1730                 goto err;
1731
1732         memset(ret,0,sizeof(SSL_CTX));
1733
1734         ret->method=meth;
1735
1736         ret->cert_store=NULL;
1737         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1738         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1739         ret->session_cache_head=NULL;
1740         ret->session_cache_tail=NULL;
1741
1742         /* We take the system default */
1743         ret->session_timeout=meth->get_timeout();
1744
1745         ret->new_session_cb=0;
1746         ret->remove_session_cb=0;
1747         ret->get_session_cb=0;
1748         ret->generate_session_id=0;
1749
1750         memset((char *)&ret->stats,0,sizeof(ret->stats));
1751
1752         ret->references=1;
1753         ret->quiet_shutdown=0;
1754
1755 /*      ret->cipher=NULL;*/
1756 /*      ret->s2->challenge=NULL;
1757         ret->master_key=NULL;
1758         ret->key_arg=NULL;
1759         ret->s2->conn_id=NULL; */
1760
1761         ret->info_callback=NULL;
1762
1763         ret->app_verify_callback=0;
1764         ret->app_verify_arg=NULL;
1765
1766         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1767         ret->read_ahead=0;
1768         ret->msg_callback=0;
1769         ret->msg_callback_arg=NULL;
1770         ret->verify_mode=SSL_VERIFY_NONE;
1771 #if 0
1772         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1773 #endif
1774         ret->sid_ctx_length=0;
1775         ret->default_verify_callback=NULL;
1776         if ((ret->cert=ssl_cert_new()) == NULL)
1777                 goto err;
1778
1779         ret->default_passwd_callback=0;
1780         ret->default_passwd_callback_userdata=NULL;
1781         ret->client_cert_cb=0;
1782         ret->app_gen_cookie_cb=0;
1783         ret->app_verify_cookie_cb=0;
1784
1785         ret->sessions=lh_SSL_SESSION_new();
1786         if (ret->sessions == NULL) goto err;
1787         ret->cert_store=X509_STORE_new();
1788         if (ret->cert_store == NULL) goto err;
1789
1790         ssl_create_cipher_list(ret->method,
1791                 &ret->cipher_list,&ret->cipher_list_by_id,
1792                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1793         if (ret->cipher_list == NULL
1794             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1795                 {
1796                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1797                 goto err2;
1798                 }
1799
1800         ret->param = X509_VERIFY_PARAM_new();
1801         if (!ret->param)
1802                 goto err;
1803
1804         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1805                 {
1806                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1807                 goto err2;
1808                 }
1809         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1810                 {
1811                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1812                 goto err2;
1813                 }
1814         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1815                 {
1816                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1817                 goto err2;
1818                 }
1819
1820         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1821                 goto err;
1822
1823         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1824
1825         ret->extra_certs=NULL;
1826         ret->comp_methods=SSL_COMP_get_compression_methods();
1827
1828         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1829
1830 #ifndef OPENSSL_NO_TLSEXT
1831         ret->tlsext_servername_callback = 0;
1832         ret->tlsext_servername_arg = NULL;
1833         /* Setup RFC4507 ticket keys */
1834         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1835                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1836                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1837                 ret->options |= SSL_OP_NO_TICKET;
1838
1839         ret->tlsext_status_cb = 0;
1840         ret->tlsext_status_arg = NULL;
1841
1842 # ifndef OPENSSL_NO_NEXTPROTONEG
1843         ret->next_protos_advertised_cb = 0;
1844         ret->next_proto_select_cb = 0;
1845 # endif
1846 #endif
1847 #ifndef OPENSSL_NO_PSK
1848         ret->psk_identity_hint=NULL;
1849         ret->psk_client_callback=NULL;
1850         ret->psk_server_callback=NULL;
1851 #endif
1852 #ifndef OPENSSL_NO_SRP
1853         SSL_CTX_SRP_CTX_init(ret);
1854 #endif
1855 #ifndef OPENSSL_NO_BUF_FREELISTS
1856         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1857         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1858         if (!ret->rbuf_freelist)
1859                 goto err;
1860         ret->rbuf_freelist->chunklen = 0;
1861         ret->rbuf_freelist->len = 0;
1862         ret->rbuf_freelist->head = NULL;
1863         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1864         if (!ret->wbuf_freelist)
1865                 {
1866                 OPENSSL_free(ret->rbuf_freelist);
1867                 goto err;
1868                 }
1869         ret->wbuf_freelist->chunklen = 0;
1870         ret->wbuf_freelist->len = 0;
1871         ret->wbuf_freelist->head = NULL;
1872 #endif
1873 #ifndef OPENSSL_NO_ENGINE
1874         ret->client_cert_engine = NULL;
1875 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1876 #define eng_strx(x)     #x
1877 #define eng_str(x)      eng_strx(x)
1878         /* Use specific client engine automatically... ignore errors */
1879         {
1880         ENGINE *eng;
1881         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1882         if (!eng)
1883                 {
1884                 ERR_clear_error();
1885                 ENGINE_load_builtin_engines();
1886                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1887                 }
1888         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1889                 ERR_clear_error();
1890         }
1891 #endif
1892 #endif
1893         /* Default is to connect to non-RI servers. When RI is more widely
1894          * deployed might change this.
1895          */
1896         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1897
1898         return(ret);
1899 err:
1900         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1901 err2:
1902         if (ret != NULL) SSL_CTX_free(ret);
1903         return(NULL);
1904         }
1905
1906 #if 0
1907 static void SSL_COMP_free(SSL_COMP *comp)
1908     { OPENSSL_free(comp); }
1909 #endif
1910
1911 #ifndef OPENSSL_NO_BUF_FREELISTS
1912 static void
1913 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1914         {
1915         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1916         for (ent = list->head; ent; ent = next)
1917                 {
1918                 next = ent->next;
1919                 OPENSSL_free(ent);
1920                 }
1921         OPENSSL_free(list);
1922         }
1923 #endif
1924
1925 void SSL_CTX_free(SSL_CTX *a)
1926         {
1927         int i;
1928
1929         if (a == NULL) return;
1930
1931         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1932 #ifdef REF_PRINT
1933         REF_PRINT("SSL_CTX",a);
1934 #endif
1935         if (i > 0) return;
1936 #ifdef REF_CHECK
1937         if (i < 0)
1938                 {
1939                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1940                 abort(); /* ok */
1941                 }
1942 #endif
1943
1944         if (a->param)
1945                 X509_VERIFY_PARAM_free(a->param);
1946
1947         /*
1948          * Free internal session cache. However: the remove_cb() may reference
1949          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1950          * after the sessions were flushed.
1951          * As the ex_data handling routines might also touch the session cache,
1952          * the most secure solution seems to be: empty (flush) the cache, then
1953          * free ex_data, then finally free the cache.
1954          * (See ticket [openssl.org #212].)
1955          */
1956         if (a->sessions != NULL)
1957                 SSL_CTX_flush_sessions(a,0);
1958
1959         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1960
1961         if (a->sessions != NULL)
1962                 lh_SSL_SESSION_free(a->sessions);
1963
1964         if (a->cert_store != NULL)
1965                 X509_STORE_free(a->cert_store);
1966         if (a->cipher_list != NULL)
1967                 sk_SSL_CIPHER_free(a->cipher_list);
1968         if (a->cipher_list_by_id != NULL)
1969                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1970         if (a->cert != NULL)
1971                 ssl_cert_free(a->cert);
1972         if (a->client_CA != NULL)
1973                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1974         if (a->extra_certs != NULL)
1975                 sk_X509_pop_free(a->extra_certs,X509_free);
1976 #if 0 /* This should never be done, since it removes a global database */
1977         if (a->comp_methods != NULL)
1978                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1979 #else
1980         a->comp_methods = NULL;
1981 #endif
1982
1983         if (a->srtp_profiles)
1984                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1985
1986 #ifndef OPENSSL_NO_PSK
1987         if (a->psk_identity_hint)
1988                 OPENSSL_free(a->psk_identity_hint);
1989 #endif
1990 #ifndef OPENSSL_NO_SRP
1991         SSL_CTX_SRP_CTX_free(a);
1992 #endif
1993 #ifndef OPENSSL_NO_ENGINE
1994         if (a->client_cert_engine)
1995                 ENGINE_finish(a->client_cert_engine);
1996 #endif
1997
1998 #ifndef OPENSSL_NO_BUF_FREELISTS
1999         if (a->wbuf_freelist)
2000                 ssl_buf_freelist_free(a->wbuf_freelist);
2001         if (a->rbuf_freelist)
2002                 ssl_buf_freelist_free(a->rbuf_freelist);
2003 #endif
2004 #ifndef OPENSSL_NO_TLSEXT
2005 # ifndef OPENSSL_NO_EC
2006         if (a->tlsext_ecpointformatlist)
2007                 OPENSSL_free(a->tlsext_ecpointformatlist);
2008         if (a->tlsext_ellipticcurvelist)
2009                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2010 # endif /* OPENSSL_NO_EC */
2011 #endif
2012
2013         OPENSSL_free(a);
2014         }
2015
2016 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2017         {
2018         ctx->default_passwd_callback=cb;
2019         }
2020
2021 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2022         {
2023         ctx->default_passwd_callback_userdata=u;
2024         }
2025
2026 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2027         {
2028         ctx->app_verify_callback=cb;
2029         ctx->app_verify_arg=arg;
2030         }
2031
2032 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2033         {
2034         ctx->verify_mode=mode;
2035         ctx->default_verify_callback=cb;
2036         }
2037
2038 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2039         {
2040         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2041         }
2042
2043 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2044         {
2045         CERT_PKEY *cpk;
2046         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2047         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2048         int rsa_tmp_export,dh_tmp_export,kl;
2049         unsigned long mask_k,mask_a,emask_k,emask_a;
2050         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2051 #ifndef OPENSSL_NO_ECDH
2052         int have_ecdh_tmp;
2053 #endif
2054         X509 *x = NULL;
2055         EVP_PKEY *ecc_pkey = NULL;
2056         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2057
2058         if (c == NULL) return;
2059
2060         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2061
2062 #ifndef OPENSSL_NO_RSA
2063         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2064         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2065                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2066 #else
2067         rsa_tmp=rsa_tmp_export=0;
2068 #endif
2069 #ifndef OPENSSL_NO_DH
2070         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2071         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2072                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2073 #else
2074         dh_tmp=dh_tmp_export=0;
2075 #endif
2076
2077 #ifndef OPENSSL_NO_ECDH
2078         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2079 #endif
2080         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2081         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2082         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2083         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2084         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2085         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2086         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2087         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2088         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2089         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2090         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2091 /* FIX THIS EAY EAY EAY */
2092         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2093         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2094         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2095         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2096         mask_k=0;
2097         mask_a=0;
2098         emask_k=0;
2099         emask_a=0;
2100
2101
2102
2103 #ifdef CIPHER_DEBUG
2104         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2105                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2106                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2107 #endif
2108
2109         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2110         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2111                 mask_k |= SSL_kGOST;
2112                 mask_a |= SSL_aGOST01;
2113         }
2114         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2115         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2116                 mask_k |= SSL_kGOST;
2117                 mask_a |= SSL_aGOST94;
2118         }
2119
2120         if (rsa_enc || (rsa_tmp && rsa_sign))
2121                 mask_k|=SSL_kRSA;
2122         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2123                 emask_k|=SSL_kRSA;
2124
2125 #if 0
2126         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2127         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2128                 (rsa_enc || rsa_sign || dsa_sign))
2129                 mask_k|=SSL_kEDH;
2130         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2131                 (rsa_enc || rsa_sign || dsa_sign))
2132                 emask_k|=SSL_kEDH;
2133 #endif
2134
2135         if (dh_tmp_export)
2136                 emask_k|=SSL_kEDH;
2137
2138         if (dh_tmp)
2139                 mask_k|=SSL_kEDH;
2140
2141         if (dh_rsa) mask_k|=SSL_kDHr;
2142         if (dh_rsa_export) emask_k|=SSL_kDHr;
2143
2144         if (dh_dsa) mask_k|=SSL_kDHd;
2145         if (dh_dsa_export) emask_k|=SSL_kDHd;
2146
2147         if (emask_k & (SSL_kDHr|SSL_kDHd))
2148                 mask_a |= SSL_aDH;
2149
2150         if (rsa_enc || rsa_sign)
2151                 {
2152                 mask_a|=SSL_aRSA;
2153                 emask_a|=SSL_aRSA;
2154                 }
2155
2156         if (dsa_sign)
2157                 {
2158                 mask_a|=SSL_aDSS;
2159                 emask_a|=SSL_aDSS;
2160                 }
2161
2162         mask_a|=SSL_aNULL;
2163         emask_a|=SSL_aNULL;
2164
2165 #ifndef OPENSSL_NO_KRB5
2166         mask_k|=SSL_kKRB5;
2167         mask_a|=SSL_aKRB5;
2168         emask_k|=SSL_kKRB5;
2169         emask_a|=SSL_aKRB5;
2170 #endif
2171
2172         /* An ECC certificate may be usable for ECDH and/or
2173          * ECDSA cipher suites depending on the key usage extension.
2174          */
2175         if (have_ecc_cert)
2176                 {
2177                 /* This call populates extension flags (ex_flags) */
2178                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2179                 X509_check_purpose(x, -1, 0);
2180                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2181                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2182                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2183                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2184                 ecc_pkey = X509_get_pubkey(x);
2185                 ecc_pkey_size = (ecc_pkey != NULL) ?
2186                     EVP_PKEY_bits(ecc_pkey) : 0;
2187                 EVP_PKEY_free(ecc_pkey);
2188                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2189                         {
2190                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2191                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2192                         }
2193 #ifndef OPENSSL_NO_ECDH
2194                 if (ecdh_ok)
2195                         {
2196
2197                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2198                                 {
2199                                 mask_k|=SSL_kECDHr;
2200                                 mask_a|=SSL_aECDH;
2201                                 if (ecc_pkey_size <= 163)
2202                                         {
2203                                         emask_k|=SSL_kECDHr;
2204                                         emask_a|=SSL_aECDH;
2205                                         }
2206                                 }
2207
2208                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2209                                 {
2210                                 mask_k|=SSL_kECDHe;
2211                                 mask_a|=SSL_aECDH;
2212                                 if (ecc_pkey_size <= 163)
2213                                         {
2214                                         emask_k|=SSL_kECDHe;
2215                                         emask_a|=SSL_aECDH;
2216                                         }
2217                                 }
2218                         }
2219 #endif
2220 #ifndef OPENSSL_NO_ECDSA
2221                 if (ecdsa_ok)
2222                         {
2223                         mask_a|=SSL_aECDSA;
2224                         emask_a|=SSL_aECDSA;
2225                         }
2226 #endif
2227                 }
2228
2229 #ifndef OPENSSL_NO_ECDH
2230         if (have_ecdh_tmp)
2231                 {
2232                 mask_k|=SSL_kEECDH;
2233                 emask_k|=SSL_kEECDH;
2234                 }
2235 #endif
2236
2237 #ifndef OPENSSL_NO_PSK
2238         mask_k |= SSL_kPSK;
2239         mask_a |= SSL_aPSK;
2240         emask_k |= SSL_kPSK;
2241         emask_a |= SSL_aPSK;
2242 #endif
2243
2244         c->mask_k=mask_k;
2245         c->mask_a=mask_a;
2246         c->export_mask_k=emask_k;
2247         c->export_mask_a=emask_a;
2248         c->valid=1;
2249         }
2250
2251 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2252 #define ku_reject(x, usage) \
2253         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2254
2255 #ifndef OPENSSL_NO_EC
2256
2257 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2258         {
2259         unsigned long alg_k, alg_a;
2260         EVP_PKEY *pkey = NULL;
2261         int keysize = 0;
2262         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2263         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2264
2265         alg_k = cs->algorithm_mkey;
2266         alg_a = cs->algorithm_auth;
2267
2268         if (SSL_C_IS_EXPORT(cs))
2269                 {
2270                 /* ECDH key length in export ciphers must be <= 163 bits */
2271                 pkey = X509_get_pubkey(x);
2272                 if (pkey == NULL) return 0;
2273                 keysize = EVP_PKEY_bits(pkey);
2274                 EVP_PKEY_free(pkey);
2275                 if (keysize > 163) return 0;
2276                 }
2277
2278         /* This call populates the ex_flags field correctly */
2279         X509_check_purpose(x, -1, 0);
2280         if ((x->sig_alg) && (x->sig_alg->algorithm))
2281                 {
2282                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2283                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2284                 }
2285         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2286                 {
2287                 /* key usage, if present, must allow key agreement */
2288                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2289                         {
2290                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2291                         return 0;
2292                         }
2293                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2294                         {
2295                         /* signature alg must be ECDSA */
2296                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2297                                 {
2298                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2299                                 return 0;
2300                                 }
2301                         }
2302                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2303                         {
2304                         /* signature alg must be RSA */
2305
2306                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2307                                 {
2308                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2309                                 return 0;
2310                                 }
2311                         }
2312                 }
2313         if (alg_a & SSL_aECDSA)
2314                 {
2315                 /* key usage, if present, must allow signing */
2316                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2317                         {
2318                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2319                         return 0;
2320                         }
2321                 }
2322
2323         return 1;  /* all checks are ok */
2324         }
2325
2326 #endif
2327
2328 /* THIS NEEDS CLEANING UP */
2329 static int ssl_get_server_cert_index(SSL *s)
2330         {
2331         unsigned long alg_k, alg_a;
2332
2333         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2334         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2335
2336         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2337                 {
2338                 /* we don't need to look at SSL_kEECDH
2339                  * since no certificate is needed for
2340                  * anon ECDH and for authenticated
2341                  * EECDH, the check for the auth
2342                  * algorithm will set i correctly
2343                  * NOTE: For ECDH-RSA, we need an ECC
2344                  * not an RSA cert but for EECDH-RSA
2345                  * we need an RSA cert. Placing the
2346                  * checks for SSL_kECDH before RSA
2347                  * checks ensures the correct cert is chosen.
2348                  */
2349                 return SSL_PKEY_ECC;
2350                 }
2351         else if (alg_a & SSL_aECDSA)
2352                 return SSL_PKEY_ECC;
2353         else if (alg_k & SSL_kDHr)
2354                 return SSL_PKEY_DH_RSA;
2355         else if (alg_k & SSL_kDHd)
2356                 return SSL_PKEY_DH_DSA;
2357         else if (alg_a & SSL_aDSS)
2358                 return SSL_PKEY_DSA_SIGN;
2359         else if (alg_a & SSL_aRSA)
2360                 {
2361                 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2362                         return SSL_PKEY_RSA_SIGN;
2363                 else
2364                         return SSL_PKEY_RSA_ENC;
2365                 }
2366         else if (alg_a & SSL_aKRB5)
2367                 /* VRS something else here? */
2368                 return -1;
2369         else if (alg_a & SSL_aGOST94)
2370                 return SSL_PKEY_GOST94;
2371         else if (alg_a & SSL_aGOST01)
2372                 return SSL_PKEY_GOST01;
2373         else /* if (alg_a & SSL_aNULL) */
2374                 {
2375                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2376                 return -1;
2377                 }
2378         }
2379
2380 CERT_PKEY *ssl_get_server_send_pkey(SSL *s)
2381         {
2382         CERT *c;
2383         int i;
2384
2385         c = s->cert;
2386         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2387
2388         i = ssl_get_server_cert_index(s);
2389
2390         /* This may or may not be an error. */
2391         if (i < 0)
2392                 return NULL;
2393
2394         /* May be NULL. */
2395         return &c->pkeys[i];
2396         }
2397
2398 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2399         {
2400         unsigned long alg_a;
2401         CERT *c;
2402         int idx = -1;
2403
2404         alg_a = cipher->algorithm_auth;
2405         c=s->cert;
2406
2407         if ((alg_a & SSL_aDSS) &&
2408                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2409                 idx = SSL_PKEY_DSA_SIGN;
2410         else if (alg_a & SSL_aRSA)
2411                 {
2412                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2413                         idx = SSL_PKEY_RSA_SIGN;
2414                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2415                         idx = SSL_PKEY_RSA_ENC;
2416                 }
2417         else if ((alg_a & SSL_aECDSA) &&
2418                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2419                 idx = SSL_PKEY_ECC;
2420         if (idx == -1)
2421                 {
2422                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2423                 return(NULL);
2424                 }
2425         if (pmd)
2426                 *pmd = c->pkeys[idx].digest;
2427         return c->pkeys[idx].privatekey;
2428         }
2429
2430 #ifndef OPENSSL_NO_TLSEXT
2431 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2432         {
2433         CERT *c;
2434         int i;
2435
2436         c = s->cert;
2437         i = ssl_get_server_cert_index(s);
2438
2439         if (i == -1)
2440                 return NULL;
2441
2442         *authz_length = 0;
2443         if (c->pkeys[i].authz == NULL)
2444                 return(NULL);
2445         *authz_length = c->pkeys[i].authz_length;
2446
2447         return c->pkeys[i].authz;
2448         }
2449 #endif
2450
2451 void ssl_update_cache(SSL *s,int mode)
2452         {
2453         int i;
2454
2455         /* If the session_id_length is 0, we are not supposed to cache it,
2456          * and it would be rather hard to do anyway :-) */
2457         if (s->session->session_id_length == 0) return;
2458
2459         i=s->session_ctx->session_cache_mode;
2460         if ((i & mode) && (!s->hit)
2461                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2462                     || SSL_CTX_add_session(s->session_ctx,s->session))
2463                 && (s->session_ctx->new_session_cb != NULL))
2464                 {
2465                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2466                 if (!s->session_ctx->new_session_cb(s,s->session))
2467                         SSL_SESSION_free(s->session);
2468                 }
2469
2470         /* auto flush every 255 connections */
2471         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2472                 ((i & mode) == mode))
2473                 {
2474                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2475                         ?s->session_ctx->stats.sess_connect_good
2476                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2477                         {
2478                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2479                         }
2480                 }
2481         }
2482
2483 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2484         {
2485         return(s->method);
2486         }
2487
2488 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2489         {
2490         int conn= -1;
2491         int ret=1;
2492
2493         if (s->method != meth)
2494                 {
2495                 if (s->handshake_func != NULL)
2496                         conn=(s->handshake_func == s->method->ssl_connect);
2497
2498                 if (s->method->version == meth->version)
2499                         s->method=meth;
2500                 else
2501                         {
2502                         s->method->ssl_free(s);
2503                         s->method=meth;
2504                         ret=s->method->ssl_new(s);
2505                         }
2506
2507                 if (conn == 1)
2508                         s->handshake_func=meth->ssl_connect;
2509                 else if (conn == 0)
2510                         s->handshake_func=meth->ssl_accept;
2511                 }
2512         return(ret);
2513         }
2514
2515 int SSL_get_error(const SSL *s,int i)
2516         {
2517         int reason;
2518         unsigned long l;
2519         BIO *bio;
2520
2521         if (i > 0) return(SSL_ERROR_NONE);
2522
2523         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2524          * etc, where we do encode the error */
2525         if ((l=ERR_peek_error()) != 0)
2526                 {
2527                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2528                         return(SSL_ERROR_SYSCALL);
2529                 else
2530                         return(SSL_ERROR_SSL);
2531                 }
2532
2533         if ((i < 0) && SSL_want_read(s))
2534                 {
2535                 bio=SSL_get_rbio(s);
2536                 if (BIO_should_read(bio))
2537                         return(SSL_ERROR_WANT_READ);
2538                 else if (BIO_should_write(bio))
2539                         /* This one doesn't make too much sense ... We never try
2540                          * to write to the rbio, and an application program where
2541                          * rbio and wbio are separate couldn't even know what it
2542                          * should wait for.
2543                          * However if we ever set s->rwstate incorrectly
2544                          * (so that we have SSL_want_read(s) instead of
2545                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2546                          * this test works around that bug; so it might be safer
2547                          * to keep it. */
2548                         return(SSL_ERROR_WANT_WRITE);
2549                 else if (BIO_should_io_special(bio))
2550                         {
2551                         reason=BIO_get_retry_reason(bio);
2552                         if (reason == BIO_RR_CONNECT)
2553                                 return(SSL_ERROR_WANT_CONNECT);
2554                         else if (reason == BIO_RR_ACCEPT)
2555                                 return(SSL_ERROR_WANT_ACCEPT);
2556                         else
2557                                 return(SSL_ERROR_SYSCALL); /* unknown */
2558                         }
2559                 }
2560
2561         if ((i < 0) && SSL_want_write(s))
2562                 {
2563                 bio=SSL_get_wbio(s);
2564                 if (BIO_should_write(bio))
2565                         return(SSL_ERROR_WANT_WRITE);
2566                 else if (BIO_should_read(bio))
2567                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2568                         return(SSL_ERROR_WANT_READ);
2569                 else if (BIO_should_io_special(bio))
2570                         {
2571                         reason=BIO_get_retry_reason(bio);
2572                         if (reason == BIO_RR_CONNECT)
2573                                 return(SSL_ERROR_WANT_CONNECT);
2574                         else if (reason == BIO_RR_ACCEPT)
2575                                 return(SSL_ERROR_WANT_ACCEPT);
2576                         else
2577                                 return(SSL_ERROR_SYSCALL);
2578                         }
2579                 }
2580         if ((i < 0) && SSL_want_x509_lookup(s))
2581                 {
2582                 return(SSL_ERROR_WANT_X509_LOOKUP);
2583                 }
2584
2585         if (i == 0)
2586                 {
2587                 if (s->version == SSL2_VERSION)
2588                         {
2589                         /* assume it is the socket being closed */
2590                         return(SSL_ERROR_ZERO_RETURN);
2591                         }
2592                 else
2593                         {
2594                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2595                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2596                                 return(SSL_ERROR_ZERO_RETURN);
2597                         }
2598                 }
2599         return(SSL_ERROR_SYSCALL);
2600         }
2601
2602 int SSL_do_handshake(SSL *s)
2603         {
2604         int ret=1;
2605
2606         if (s->handshake_func == NULL)
2607                 {
2608                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2609                 return(-1);
2610                 }
2611
2612         s->method->ssl_renegotiate_check(s);
2613
2614         if (SSL_in_init(s) || SSL_in_before(s))
2615                 {
2616                 ret=s->handshake_func(s);
2617                 }
2618         return(ret);
2619         }
2620
2621 /* For the next 2 functions, SSL_clear() sets shutdown and so
2622  * one of these calls will reset it */
2623 void SSL_set_accept_state(SSL *s)
2624         {
2625         s->server=1;
2626         s->shutdown=0;
2627         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2628         s->handshake_func=s->method->ssl_accept;
2629         /* clear the current cipher */
2630         ssl_clear_cipher_ctx(s);
2631         ssl_clear_hash_ctx(&s->read_hash);
2632         ssl_clear_hash_ctx(&s->write_hash);
2633         }
2634
2635 void SSL_set_connect_state(SSL *s)
2636         {
2637         s->server=0;
2638         s->shutdown=0;
2639         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2640         s->handshake_func=s->method->ssl_connect;
2641         /* clear the current cipher */
2642         ssl_clear_cipher_ctx(s);
2643         ssl_clear_hash_ctx(&s->read_hash);
2644         ssl_clear_hash_ctx(&s->write_hash);
2645         }
2646
2647 int ssl_undefined_function(SSL *s)
2648         {
2649         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2650         return(0);
2651         }
2652
2653 int ssl_undefined_void_function(void)
2654         {
2655         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2656         return(0);
2657         }
2658
2659 int ssl_undefined_const_function(const SSL *s)
2660         {
2661         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2662         return(0);
2663         }
2664
2665 SSL_METHOD *ssl_bad_method(int ver)
2666         {
2667         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2668         return(NULL);
2669         }
2670
2671 const char *SSL_get_version(const SSL *s)
2672         {
2673         if (s->version == TLS1_2_VERSION)
2674                 return("TLSv1.2");
2675         else if (s->version == TLS1_1_VERSION)
2676                 return("TLSv1.1");
2677         else if (s->version == TLS1_VERSION)
2678                 return("TLSv1");
2679         else if (s->version == SSL3_VERSION)
2680                 return("SSLv3");
2681         else if (s->version == SSL2_VERSION)
2682                 return("SSLv2");
2683         else
2684                 return("unknown");
2685         }
2686
2687 SSL *SSL_dup(SSL *s)
2688         {
2689         STACK_OF(X509_NAME) *sk;
2690         X509_NAME *xn;
2691         SSL *ret;
2692         int i;
2693
2694         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2695             return(NULL);
2696
2697         ret->version = s->version;
2698         ret->type = s->type;
2699         ret->method = s->method;
2700
2701         if (s->session != NULL)
2702                 {
2703                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2704                 SSL_copy_session_id(ret,s);
2705                 }
2706         else
2707                 {
2708                 /* No session has been established yet, so we have to expect
2709                  * that s->cert or ret->cert will be changed later --
2710                  * they should not both point to the same object,
2711                  * and thus we can't use SSL_copy_session_id. */
2712
2713                 ret->method->ssl_free(ret);
2714                 ret->method = s->method;
2715                 ret->method->ssl_new(ret);
2716
2717                 if (s->cert != NULL)
2718                         {
2719                         if (ret->cert != NULL)
2720                                 {
2721                                 ssl_cert_free(ret->cert);
2722                                 }
2723                         ret->cert = ssl_cert_dup(s->cert);
2724                         if (ret->cert == NULL)
2725                                 goto err;
2726                         }
2727
2728                 SSL_set_session_id_context(ret,
2729                         s->sid_ctx, s->sid_ctx_length);
2730                 }
2731
2732         ret->options=s->options;
2733         ret->mode=s->mode;
2734         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2735         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2736         ret->msg_callback = s->msg_callback;
2737         ret->msg_callback_arg = s->msg_callback_arg;
2738         SSL_set_verify(ret,SSL_get_verify_mode(s),
2739                 SSL_get_verify_callback(s));
2740         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2741         ret->generate_session_id = s->generate_session_id;
2742
2743         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2744
2745         ret->debug=s->debug;
2746
2747         /* copy app data, a little dangerous perhaps */
2748         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2749                 goto err;
2750
2751         /* setup rbio, and wbio */
2752         if (s->rbio != NULL)
2753                 {
2754                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2755                         goto err;
2756                 }
2757         if (s->wbio != NULL)
2758                 {
2759                 if (s->wbio != s->rbio)
2760                         {
2761                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2762                                 goto err;
2763                         }
2764                 else
2765                         ret->wbio=ret->rbio;
2766                 }
2767         ret->rwstate = s->rwstate;
2768         ret->in_handshake = s->in_handshake;
2769         ret->handshake_func = s->handshake_func;
2770         ret->server = s->server;
2771         ret->renegotiate = s->renegotiate;
2772         ret->new_session = s->new_session;
2773         ret->quiet_shutdown = s->quiet_shutdown;
2774         ret->shutdown=s->shutdown;
2775         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2776         ret->rstate=s->rstate;
2777         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2778         ret->hit=s->hit;
2779
2780         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2781
2782         /* dup the cipher_list and cipher_list_by_id stacks */
2783         if (s->cipher_list != NULL)
2784                 {
2785                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2786                         goto err;
2787                 }
2788         if (s->cipher_list_by_id != NULL)
2789                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2790                         == NULL)
2791                         goto err;
2792
2793         /* Dup the client_CA list */
2794         if (s->client_CA != NULL)
2795                 {
2796                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2797                 ret->client_CA=sk;
2798                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2799                         {
2800                         xn=sk_X509_NAME_value(sk,i);
2801                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2802                                 {
2803                                 X509_NAME_free(xn);
2804                                 goto err;
2805                                 }
2806                         }
2807                 }
2808
2809         if (0)
2810                 {
2811 err:
2812                 if (ret != NULL) SSL_free(ret);
2813                 ret=NULL;
2814                 }
2815         return(ret);
2816         }
2817
2818 void ssl_clear_cipher_ctx(SSL *s)
2819         {
2820         if (s->enc_read_ctx != NULL)
2821                 {
2822                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2823                 OPENSSL_free(s->enc_read_ctx);
2824                 s->enc_read_ctx=NULL;
2825                 }
2826         if (s->enc_write_ctx != NULL)
2827                 {
2828                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2829                 OPENSSL_free(s->enc_write_ctx);
2830                 s->enc_write_ctx=NULL;
2831                 }
2832 #ifndef OPENSSL_NO_COMP
2833         if (s->expand != NULL)
2834                 {
2835                 COMP_CTX_free(s->expand);
2836                 s->expand=NULL;
2837                 }
2838         if (s->compress != NULL)
2839                 {
2840                 COMP_CTX_free(s->compress);
2841                 s->compress=NULL;
2842                 }
2843 #endif
2844         }
2845
2846 /* Fix this function so that it takes an optional type parameter */
2847 X509 *SSL_get_certificate(const SSL *s)
2848         {
2849         if (s->cert != NULL)
2850                 return(s->cert->key->x509);
2851         else
2852                 return(NULL);
2853         }
2854
2855 /* Fix this function so that it takes an optional type parameter */
2856 EVP_PKEY *SSL_get_privatekey(SSL *s)
2857         {
2858         if (s->cert != NULL)
2859                 return(s->cert->key->privatekey);
2860         else
2861                 return(NULL);
2862         }
2863
2864 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2865         {
2866         if ((s->session != NULL) && (s->session->cipher != NULL))
2867                 return(s->session->cipher);
2868         return(NULL);
2869         }
2870 #ifdef OPENSSL_NO_COMP
2871 const void *SSL_get_current_compression(SSL *s)
2872         {
2873         return NULL;
2874         }
2875 const void *SSL_get_current_expansion(SSL *s)
2876         {
2877         return NULL;
2878         }
2879 #else
2880
2881 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2882         {
2883         if (s->compress != NULL)
2884                 return(s->compress->meth);
2885         return(NULL);
2886         }
2887
2888 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2889         {
2890         if (s->expand != NULL)
2891                 return(s->expand->meth);
2892         return(NULL);
2893         }
2894 #endif
2895
2896 int ssl_init_wbio_buffer(SSL *s,int push)
2897         {
2898         BIO *bbio;
2899
2900         if (s->bbio == NULL)
2901                 {
2902                 bbio=BIO_new(BIO_f_buffer());
2903                 if (bbio == NULL) return(0);
2904                 s->bbio=bbio;
2905                 }
2906         else
2907                 {
2908                 bbio=s->bbio;
2909                 if (s->bbio == s->wbio)
2910                         s->wbio=BIO_pop(s->wbio);
2911                 }
2912         (void)BIO_reset(bbio);
2913 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2914         if (!BIO_set_read_buffer_size(bbio,1))
2915                 {
2916                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2917                 return(0);
2918                 }
2919         if (push)
2920                 {
2921                 if (s->wbio != bbio)
2922                         s->wbio=BIO_push(bbio,s->wbio);
2923                 }
2924         else
2925                 {
2926                 if (s->wbio == bbio)
2927                         s->wbio=BIO_pop(bbio);
2928                 }
2929         return(1);
2930         }
2931
2932 void ssl_free_wbio_buffer(SSL *s)
2933         {
2934         if (s->bbio == NULL) return;
2935
2936         if (s->bbio == s->wbio)
2937                 {
2938                 /* remove buffering */
2939                 s->wbio=BIO_pop(s->wbio);
2940 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2941                 assert(s->wbio != NULL);
2942 #endif
2943         }
2944         BIO_free(s->bbio);
2945         s->bbio=NULL;
2946         }
2947
2948 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2949         {
2950         ctx->quiet_shutdown=mode;
2951         }
2952
2953 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2954         {
2955         return(ctx->quiet_shutdown);
2956         }
2957
2958 void SSL_set_quiet_shutdown(SSL *s,int mode)
2959         {
2960         s->quiet_shutdown=mode;
2961         }
2962
2963 int SSL_get_quiet_shutdown(const SSL *s)
2964         {
2965         return(s->quiet_shutdown);
2966         }
2967
2968 void SSL_set_shutdown(SSL *s,int mode)
2969         {
2970         s->shutdown=mode;
2971         }
2972
2973 int SSL_get_shutdown(const SSL *s)
2974         {
2975         return(s->shutdown);
2976         }
2977
2978 int SSL_version(const SSL *s)
2979         {
2980         return(s->version);
2981         }
2982
2983 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2984         {
2985         return(ssl->ctx);
2986         }
2987
2988 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2989         {
2990         if (ssl->ctx == ctx)
2991                 return ssl->ctx;
2992 #ifndef OPENSSL_NO_TLSEXT
2993         if (ctx == NULL)
2994                 ctx = ssl->initial_ctx;
2995 #endif
2996         if (ssl->cert != NULL)
2997                 ssl_cert_free(ssl->cert);
2998         ssl->cert = ssl_cert_dup(ctx->cert);
2999         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3000         if (ssl->ctx != NULL)
3001                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3002         ssl->ctx = ctx;
3003         return(ssl->ctx);
3004         }
3005
3006 #ifndef OPENSSL_NO_STDIO
3007 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3008         {
3009         return(X509_STORE_set_default_paths(ctx->cert_store));
3010         }
3011
3012 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3013                 const char *CApath)
3014         {
3015         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3016         }
3017 #endif
3018
3019 void SSL_set_info_callback(SSL *ssl,
3020         void (*cb)(const SSL *ssl,int type,int val))
3021         {
3022         ssl->info_callback=cb;
3023         }
3024
3025 /* One compiler (Diab DCC) doesn't like argument names in returned
3026    function pointer.  */
3027 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3028         {
3029         return ssl->info_callback;
3030         }
3031
3032 int SSL_state(const SSL *ssl)
3033         {
3034         return(ssl->state);
3035         }
3036
3037 void SSL_set_state(SSL *ssl, int state)
3038         {
3039         ssl->state = state;
3040         }
3041
3042 void SSL_set_verify_result(SSL *ssl,long arg)
3043         {
3044         ssl->verify_result=arg;
3045         }
3046
3047 long SSL_get_verify_result(const SSL *ssl)
3048         {
3049         return(ssl->verify_result);
3050         }
3051
3052 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3053                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3054         {
3055         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3056                                 new_func, dup_func, free_func);
3057         }
3058
3059 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3060         {
3061         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3062         }
3063
3064 void *SSL_get_ex_data(const SSL *s,int idx)
3065         {
3066         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3067         }
3068
3069 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3070                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3071         {
3072         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3073                                 new_func, dup_func, free_func);
3074         }
3075
3076 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3077         {
3078         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3079         }
3080
3081 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3082         {
3083         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3084         }
3085
3086 int ssl_ok(SSL *s)
3087         {
3088         return(1);
3089         }
3090
3091 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3092         {
3093         return(ctx->cert_store);
3094         }
3095
3096 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3097         {
3098         if (ctx->cert_store != NULL)
3099                 X509_STORE_free(ctx->cert_store);
3100         ctx->cert_store=store;
3101         }
3102
3103 int SSL_want(const SSL *s)
3104         {
3105         return(s->rwstate);
3106         }
3107
3108 /*!
3109  * \brief Set the callback for generating temporary RSA keys.
3110  * \param ctx the SSL context.
3111  * \param cb the callback
3112  */
3113
3114 #ifndef OPENSSL_NO_RSA
3115 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3116                                                           int is_export,
3117                                                           int keylength))
3118     {
3119     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3120     }
3121
3122 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3123                                                   int is_export,
3124                                                   int keylength))
3125     {
3126     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3127     }
3128 #endif
3129
3130 #ifdef DOXYGEN
3131 /*!
3132  * \brief The RSA temporary key callback function.
3133  * \param ssl the SSL session.
3134  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3135  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3136  * of the required key in bits.
3137  * \return the temporary RSA key.
3138  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3139  */
3140
3141 RSA *cb(SSL *ssl,int is_export,int keylength)
3142     {}
3143 #endif
3144
3145 /*!
3146  * \brief Set the callback for generating temporary DH keys.
3147  * \param ctx the SSL context.
3148  * \param dh the callback
3149  */
3150
3151 #ifndef OPENSSL_NO_DH
3152 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3153                                                         int keylength))
3154         {
3155         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3156         }
3157
3158 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3159                                                 int keylength))
3160         {
3161         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3162         }
3163 #endif
3164
3165 #ifndef OPENSSL_NO_ECDH
3166 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3167                                                                 int keylength))
3168         {
3169         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3170         }
3171
3172 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3173                                                         int keylength))
3174         {
3175         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3176         }
3177 #endif
3178
3179 #ifndef OPENSSL_NO_PSK
3180 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3181         {
3182         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3183                 {
3184                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3185                 return 0;
3186                 }
3187         if (ctx->psk_identity_hint != NULL)
3188                 OPENSSL_free(ctx->psk_identity_hint);
3189         if (identity_hint != NULL)
3190                 {
3191                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3192                 if (ctx->psk_identity_hint == NULL)
3193                         return 0;
3194                 }
3195         else
3196                 ctx->psk_identity_hint = NULL;
3197         return 1;
3198         }
3199
3200 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3201         {
3202         if (s == NULL)
3203                 return 0;
3204
3205         if (s->session == NULL)
3206                 return 1; /* session not created yet, ignored */
3207
3208         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3209                 {
3210                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3211                 return 0;
3212                 }
3213         if (s->session->psk_identity_hint != NULL)
3214                 OPENSSL_free(s->session->psk_identity_hint);
3215         if (identity_hint != NULL)
3216                 {
3217                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3218                 if (s->session->psk_identity_hint == NULL)
3219                         return 0;
3220                 }
3221         else
3222                 s->session->psk_identity_hint = NULL;
3223         return 1;
3224         }
3225
3226 const char *SSL_get_psk_identity_hint(const SSL *s)
3227         {
3228         if (s == NULL || s->session == NULL)
3229                 return NULL;
3230         return(s->session->psk_identity_hint);
3231         }
3232
3233 const char *SSL_get_psk_identity(const SSL *s)
3234         {
3235         if (s == NULL || s->session == NULL)
3236                 return NULL;
3237         return(s->session->psk_identity);
3238         }
3239
3240 void SSL_set_psk_client_callback(SSL *s,
3241     unsigned int (*cb)(SSL *ssl, const char *hint,
3242                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3243                        unsigned int max_psk_len))
3244         {
3245         s->psk_client_callback = cb;
3246         }
3247
3248 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3249     unsigned int (*cb)(SSL *ssl, const char *hint,
3250                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3251                        unsigned int max_psk_len))
3252         {
3253         ctx->psk_client_callback = cb;
3254         }
3255
3256 void SSL_set_psk_server_callback(SSL *s,
3257     unsigned int (*cb)(SSL *ssl, const char *identity,
3258                        unsigned char *psk, unsigned int max_psk_len))
3259         {
3260         s->psk_server_callback = cb;
3261         }
3262
3263 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3264     unsigned int (*cb)(SSL *ssl, const char *identity,
3265                        unsigned char *psk, unsigned int max_psk_len))
3266         {
3267         ctx->psk_server_callback = cb;
3268         }
3269 #endif
3270
3271 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))
3272         {
3273         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3274         }
3275 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))
3276         {
3277         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3278         }
3279
3280 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3281         int (*cb)(SSL *ssl, int is_forward_secure))
3282         {
3283         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3284                 (void (*)(void))cb);
3285         }
3286 void SSL_set_not_resumable_session_callback(SSL *ssl,
3287         int (*cb)(SSL *ssl, int is_forward_secure))
3288         {
3289         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3290                 (void (*)(void))cb);
3291         }
3292
3293 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3294  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3295  * any. If EVP_MD pointer is passed, initializes ctx with this md
3296  * Returns newly allocated ctx;
3297  */
3298
3299 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3300 {
3301         ssl_clear_hash_ctx(hash);
3302         *hash = EVP_MD_CTX_create();
3303         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3304         return *hash;
3305 }
3306 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3307 {
3308
3309         if (*hash) EVP_MD_CTX_destroy(*hash);
3310         *hash=NULL;
3311 }
3312
3313 void SSL_set_debug(SSL *s, int debug)
3314         {
3315         s->debug = debug;
3316         }
3317
3318 int SSL_cache_hit(SSL *s)
3319         {
3320         return s->hit;
3321         }
3322
3323 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3324 #include "../crypto/bio/bss_file.c"
3325 #endif
3326
3327 IMPLEMENT_STACK_OF(SSL_CIPHER)
3328 IMPLEMENT_STACK_OF(SSL_COMP)
3329 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3330                                     ssl_cipher_id);