ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function,
 180         (int (*)(SSL *, unsigned char *, size_t, const char *,
 181                  size_t, const unsigned char *, size_t,
 182                  int use_context)) ssl_undefined_function,
 183         };
 184
 185 int SSL_clear(SSL *s)
 186         {
 187
 188         if (s->method == NULL)
 189                 {
 190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 191                 return(0);
 192                 }
 193
 194         if (ssl_clear_bad_session(s))
 195                 {
 196                 SSL_SESSION_free(s->session);
 197                 s->session=NULL;
 198                 }
 199
 200         s->error=0;
 201         s->hit=0;
 202         s->shutdown=0;
 203
 204 #if 0 /* Disabled since version 1.10 of this file (early return not
 205        * needed because SSL_clear is not called when doing renegotiation) */
 206         /* This is set if we are doing dynamic renegotiation so keep
 207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 208         if (s->renegotiate) return(1);
 209 #else
 210         if (s->renegotiate)
 211                 {
 212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 213                 return 0;
 214                 }
 215 #endif
 216
 217         s->type=0;
 218
 219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 220
 221         s->version=s->method->version;
 222         s->client_version=s->version;
 223         s->rwstate=SSL_NOTHING;
 224         s->rstate=SSL_ST_READ_HEADER;
 225 #if 0
 226         s->read_ahead=s->ctx->read_ahead;
 227 #endif
 228
 229         if (s->init_buf != NULL)
 230                 {
 231                 BUF_MEM_free(s->init_buf);
 232                 s->init_buf=NULL;
 233                 }
 234
 235         ssl_clear_cipher_ctx(s);
 236         ssl_clear_hash_ctx(&s->read_hash);
 237         ssl_clear_hash_ctx(&s->write_hash);
 238
 239         s->first_packet=0;
 240
 241 #if 1
 242         /* Check to see if we were changed into a different method, if
 243          * so, revert back if we are not doing session-id reuse. */
 244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 245                 {
 246                 s->method->ssl_free(s);
 247                 s->method=s->ctx->method;
 248                 if (!s->method->ssl_new(s))
 249                         return(0);
 250                 }
 251         else
 252 #endif
 253                 s->method->ssl_clear(s);
 254         return(1);
 255         }
 256
 257 /** Used to change an SSL_CTXs default SSL method type */
 258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 259         {
 260         STACK_OF(SSL_CIPHER) *sk;
 261
 262         ctx->method=meth;
 263
 264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 265                 &(ctx->cipher_list_by_id),
 266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ctx->cert);
 267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 268                 {
 269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274
 275 SSL *SSL_new(SSL_CTX *ctx)
 276         {
 277         SSL *s;
 278
 279         if (ctx == NULL)
 280                 {
 281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 282                 return(NULL);
 283                 }
 284         if (ctx->method == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 287                 return(NULL);
 288                 }
 289
 290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 291         if (s == NULL) goto err;
 292         memset(s,0,sizeof(SSL));
 293
 294 #ifndef OPENSSL_NO_KRB5
 295         s->kssl_ctx = kssl_ctx_new();
 296 #endif  /* OPENSSL_NO_KRB5 */
 297
 298         s->options=ctx->options;
 299         s->mode=ctx->mode;
 300         s->max_cert_list=ctx->max_cert_list;
 301
 302         if (ctx->cert != NULL)
 303                 {
 304                 /* Earlier library versions used to copy the pointer to
 305                  * the CERT, not its contents; only when setting new
 306                  * parameters for the per-SSL copy, ssl_cert_new would be
 307                  * called (and the direct reference to the per-SSL_CTX
 308                  * settings would be lost, but those still were indirectly
 309                  * accessed for various purposes, and for that reason they
 310                  * used to be known as s->ctx->default_cert).
 311                  * Now we don't look at the SSL_CTX's CERT after having
 312                  * duplicated it once. */
 313
 314                 s->cert = ssl_cert_dup(ctx->cert);
 315                 if (s->cert == NULL)
 316                         goto err;
 317                 }
 318         else
 319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 320
 321         s->read_ahead=ctx->read_ahead;
 322         s->msg_callback=ctx->msg_callback;
 323         s->msg_callback_arg=ctx->msg_callback_arg;
 324         s->verify_mode=ctx->verify_mode;
 325 #if 0
 326         s->verify_depth=ctx->verify_depth;
 327 #endif
 328         s->sid_ctx_length=ctx->sid_ctx_length;
 329         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 330         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 331         s->verify_callback=ctx->default_verify_callback;
 332         s->generate_session_id=ctx->generate_session_id;
 333
 334         s->param = X509_VERIFY_PARAM_new();
 335         if (!s->param)
 336                 goto err;
 337         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 338 #if 0
 339         s->purpose = ctx->purpose;
 340         s->trust = ctx->trust;
 341 #endif
 342         s->quiet_shutdown=ctx->quiet_shutdown;
 343         s->max_send_fragment = ctx->max_send_fragment;
 344
 345         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 346         s->ctx=ctx;
 347 #ifndef OPENSSL_NO_TLSEXT
 348         s->tlsext_debug_cb = 0;
 349         s->tlsext_debug_arg = NULL;
 350         s->tlsext_ticket_expected = 0;
 351         s->tlsext_status_type = -1;
 352         s->tlsext_status_expected = 0;
 353         s->tlsext_ocsp_ids = NULL;
 354         s->tlsext_ocsp_exts = NULL;
 355         s->tlsext_ocsp_resp = NULL;
 356         s->tlsext_ocsp_resplen = -1;
 357         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 358         s->initial_ctx=ctx;
 359 #ifndef OPENSSL_NO_EC
 360         if (ctx->tlsext_ecpointformatlist)
 361                 {
 362                 s->tlsext_ecpointformatlist =
 363                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 364                                         ctx->tlsext_ecpointformatlist_length);
 365                 if (!s->tlsext_ecpointformatlist)
 366                         goto err;
 367                 s->tlsext_ecpointformatlist_length =
 368                                         ctx->tlsext_ecpointformatlist_length;
 369                 }
 370         if (ctx->tlsext_ellipticcurvelist)
 371                 {
 372                 s->tlsext_ellipticcurvelist =
 373                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 374                                         ctx->tlsext_ellipticcurvelist_length);
 375                 if (!s->tlsext_ellipticcurvelist)
 376                         goto err;
 377                 s->tlsext_ellipticcurvelist_length =
 378                                         ctx->tlsext_ellipticcurvelist_length;
 379                 }
 380 #endif
 381 # ifndef OPENSSL_NO_NEXTPROTONEG
 382         s->next_proto_negotiated = NULL;
 383 # endif
 384 #endif
 385
 386         s->verify_result=X509_V_OK;
 387
 388         s->method=ctx->method;
 389
 390         if (!s->method->ssl_new(s))
 391                 goto err;
 392
 393         s->references=1;
 394         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 395
 396         SSL_clear(s);
 397
 398         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 399
 400 #ifndef OPENSSL_NO_PSK
 401         s->psk_client_callback=ctx->psk_client_callback;
 402         s->psk_server_callback=ctx->psk_server_callback;
 403 #endif
 404
 405         return(s);
 406 err:
 407         if (s != NULL)
 408                 {
 409                 if (s->cert != NULL)
 410                         ssl_cert_free(s->cert);
 411                 if (s->ctx != NULL)
 412                         SSL_CTX_free(s->ctx); /* decrement reference count */
 413                 OPENSSL_free(s);
 414                 }
 415         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 416         return(NULL);
 417         }
 418
 419 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 420                                    unsigned int sid_ctx_len)
 421     {
 422     if(sid_ctx_len > sizeof ctx->sid_ctx)
 423         {
 424         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 425         return 0;
 426         }
 427     ctx->sid_ctx_length=sid_ctx_len;
 428     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 429
 430     return 1;
 431     }
 432
 433 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 434                                unsigned int sid_ctx_len)
 435     {
 436     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 437         {
 438         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 439         return 0;
 440         }
 441     ssl->sid_ctx_length=sid_ctx_len;
 442     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 443
 444     return 1;
 445     }
 446
 447 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 448         {
 449         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 450         ctx->generate_session_id = cb;
 451         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 452         return 1;
 453         }
 454
 455 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 456         {
 457         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 458         ssl->generate_session_id = cb;
 459         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 460         return 1;
 461         }
 462
 463 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 464                                 unsigned int id_len)
 465         {
 466         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 467          * we can "construct" a session to give us the desired check - ie. to
 468          * find if there's a session in the hash table that would conflict with
 469          * any new session built out of this id/id_len and the ssl_version in
 470          * use by this SSL. */
 471         SSL_SESSION r, *p;
 472
 473         if(id_len > sizeof r.session_id)
 474                 return 0;
 475
 476         r.ssl_version = ssl->version;
 477         r.session_id_length = id_len;
 478         memcpy(r.session_id, id, id_len);
 479         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 480          * callback is calling us to check the uniqueness of a shorter ID, it
 481          * must be compared as a padded-out ID because that is what it will be
 482          * converted to when the callback has finished choosing it. */
 483         if((r.ssl_version == SSL2_VERSION) &&
 484                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 485                 {
 486                 memset(r.session_id + id_len, 0,
 487                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 488                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 489                 }
 490
 491         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 492         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 493         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 494         return (p != NULL);
 495         }
 496
 497 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 498         {
 499         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 500         }
 501
 502 int SSL_set_purpose(SSL *s, int purpose)
 503         {
 504         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 505         }
 506
 507 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 508         {
 509         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 510         }
 511
 512 int SSL_set_trust(SSL *s, int trust)
 513         {
 514         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 515         }
 516
 517 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 518         {
 519         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 520         }
 521
 522 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 523         {
 524         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 525         }
 526
 527 void SSL_certs_clear(SSL *s)
 528         {
 529         ssl_cert_clear_certs(s->cert);
 530         }
 531
 532 void SSL_free(SSL *s)
 533         {
 534         int i;
 535
 536         if(s == NULL)
 537             return;
 538
 539         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 540 #ifdef REF_PRINT
 541         REF_PRINT("SSL",s);
 542 #endif
 543         if (i > 0) return;
 544 #ifdef REF_CHECK
 545         if (i < 0)
 546                 {
 547                 fprintf(stderr,"SSL_free, bad reference count\n");
 548                 abort(); /* ok */
 549                 }
 550 #endif
 551
 552         if (s->param)
 553                 X509_VERIFY_PARAM_free(s->param);
 554
 555         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 556
 557         if (s->bbio != NULL)
 558                 {
 559                 /* If the buffering BIO is in place, pop it off */
 560                 if (s->bbio == s->wbio)
 561                         {
 562                         s->wbio=BIO_pop(s->wbio);
 563                         }
 564                 BIO_free(s->bbio);
 565                 s->bbio=NULL;
 566                 }
 567         if (s->rbio != NULL)
 568                 BIO_free_all(s->rbio);
 569         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 570                 BIO_free_all(s->wbio);
 571
 572         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 573
 574         /* add extra stuff */
 575         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 576         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 577
 578         /* Make the next call work :-) */
 579         if (s->session != NULL)
 580                 {
 581                 ssl_clear_bad_session(s);
 582                 SSL_SESSION_free(s->session);
 583                 }
 584
 585         ssl_clear_cipher_ctx(s);
 586         ssl_clear_hash_ctx(&s->read_hash);
 587         ssl_clear_hash_ctx(&s->write_hash);
 588
 589         if (s->cert != NULL) ssl_cert_free(s->cert);
 590         /* Free up if allocated */
 591
 592 #ifndef OPENSSL_NO_TLSEXT
 593         if (s->tlsext_hostname)
 594                 OPENSSL_free(s->tlsext_hostname);
 595         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 596 #ifndef OPENSSL_NO_EC
 597         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 598         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 599 #endif /* OPENSSL_NO_EC */
 600         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 601         if (s->tlsext_ocsp_exts)
 602                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 603                                                 X509_EXTENSION_free);
 604         if (s->tlsext_ocsp_ids)
 605                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 606         if (s->tlsext_ocsp_resp)
 607                 OPENSSL_free(s->tlsext_ocsp_resp);
 608 #endif
 609
 610         if (s->client_CA != NULL)
 611                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 612
 613         if (s->method != NULL) s->method->ssl_free(s);
 614
 615         if (s->ctx) SSL_CTX_free(s->ctx);
 616
 617 #ifndef OPENSSL_NO_KRB5
 618         if (s->kssl_ctx != NULL)
 619                 kssl_ctx_free(s->kssl_ctx);
 620 #endif  /* OPENSSL_NO_KRB5 */
 621
 622 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 623         if (s->next_proto_negotiated)
 624                 OPENSSL_free(s->next_proto_negotiated);
 625 #endif
 626
 627         if (s->srtp_profiles)
 628             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 629
 630 #ifndef OPENSSL_NO_DANE
 631         if (s->tlsa_record && s->tlsa_record!=(void *)-1)
 632                 OPENSSL_free(s->tlsa_record);
 633 #endif
 634
 635         OPENSSL_free(s);
 636         }
 637
 638 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 639         {
 640         /* If the output buffering BIO is still in place, remove it
 641          */
 642         if (s->bbio != NULL)
 643                 {
 644                 if (s->wbio == s->bbio)
 645                         {
 646                         s->wbio=s->wbio->next_bio;
 647                         s->bbio->next_bio=NULL;
 648                         }
 649                 }
 650         if ((s->rbio != NULL) && (s->rbio != rbio))
 651                 BIO_free_all(s->rbio);
 652         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 653                 BIO_free_all(s->wbio);
 654         s->rbio=rbio;
 655         s->wbio=wbio;
 656         }
 657
 658 BIO *SSL_get_rbio(const SSL *s)
 659         { return(s->rbio); }
 660
 661 BIO *SSL_get_wbio(const SSL *s)
 662         { return(s->wbio); }
 663
 664 int SSL_get_fd(const SSL *s)
 665         {
 666         return(SSL_get_rfd(s));
 667         }
 668
 669 int SSL_get_rfd(const SSL *s)
 670         {
 671         int ret= -1;
 672         BIO *b,*r;
 673
 674         b=SSL_get_rbio(s);
 675         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 676         if (r != NULL)
 677                 BIO_get_fd(r,&ret);
 678         return(ret);
 679         }
 680
 681 int SSL_get_wfd(const SSL *s)
 682         {
 683         int ret= -1;
 684         BIO *b,*r;
 685
 686         b=SSL_get_wbio(s);
 687         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 688         if (r != NULL)
 689                 BIO_get_fd(r,&ret);
 690         return(ret);
 691         }
 692
 693 #ifndef OPENSSL_NO_SOCK
 694 int SSL_set_fd(SSL *s,int fd)
 695         {
 696         int ret=0;
 697         BIO *bio=NULL;
 698
 699         bio=BIO_new(BIO_s_socket());
 700
 701         if (bio == NULL)
 702                 {
 703                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 704                 goto err;
 705                 }
 706         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 707         SSL_set_bio(s,bio,bio);
 708         ret=1;
 709 err:
 710         return(ret);
 711         }
 712
 713 int SSL_set_wfd(SSL *s,int fd)
 714         {
 715         int ret=0;
 716         BIO *bio=NULL;
 717
 718         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 719                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 720                 {
 721                 bio=BIO_new(BIO_s_socket());
 722
 723                 if (bio == NULL)
 724                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 725                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 726                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 727                 }
 728         else
 729                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 730         ret=1;
 731 err:
 732         return(ret);
 733         }
 734
 735 int SSL_set_rfd(SSL *s,int fd)
 736         {
 737         int ret=0;
 738         BIO *bio=NULL;
 739
 740         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 741                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 742                 {
 743                 bio=BIO_new(BIO_s_socket());
 744
 745                 if (bio == NULL)
 746                         {
 747                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 748                         goto err;
 749                         }
 750                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 751                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 752                 }
 753         else
 754                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 755         ret=1;
 756 err:
 757         return(ret);
 758         }
 759 #endif
 760
 761
 762 /* return length of latest Finished message we sent, copy to 'buf' */
 763 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 764         {
 765         size_t ret = 0;
 766
 767         if (s->s3 != NULL)
 768                 {
 769                 ret = s->s3->tmp.finish_md_len;
 770                 if (count > ret)
 771                         count = ret;
 772                 memcpy(buf, s->s3->tmp.finish_md, count);
 773                 }
 774         return ret;
 775         }
 776
 777 /* return length of latest Finished message we expected, copy to 'buf' */
 778 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 779         {
 780         size_t ret = 0;
 781
 782         if (s->s3 != NULL)
 783                 {
 784                 ret = s->s3->tmp.peer_finish_md_len;
 785                 if (count > ret)
 786                         count = ret;
 787                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 788                 }
 789         return ret;
 790         }
 791
 792
 793 int SSL_get_verify_mode(const SSL *s)
 794         {
 795         return(s->verify_mode);
 796         }
 797
 798 int SSL_get_verify_depth(const SSL *s)
 799         {
 800         return X509_VERIFY_PARAM_get_depth(s->param);
 801         }
 802
 803 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 804         {
 805         return(s->verify_callback);
 806         }
 807
 808 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 809         {
 810         return(ctx->verify_mode);
 811         }
 812
 813 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 814         {
 815         return X509_VERIFY_PARAM_get_depth(ctx->param);
 816         }
 817
 818 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 819         {
 820         return(ctx->default_verify_callback);
 821         }
 822
 823 void SSL_set_verify(SSL *s,int mode,
 824                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 825         {
 826         s->verify_mode=mode;
 827         if (callback != NULL)
 828                 s->verify_callback=callback;
 829         }
 830
 831 void SSL_set_verify_depth(SSL *s,int depth)
 832         {
 833         X509_VERIFY_PARAM_set_depth(s->param, depth);
 834         }
 835
 836 void SSL_set_read_ahead(SSL *s,int yes)
 837         {
 838         s->read_ahead=yes;
 839         }
 840
 841 int SSL_get_read_ahead(const SSL *s)
 842         {
 843         return(s->read_ahead);
 844         }
 845
 846 int SSL_pending(const SSL *s)
 847         {
 848         /* SSL_pending cannot work properly if read-ahead is enabled
 849          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 850          * and it is impossible to fix since SSL_pending cannot report
 851          * errors that may be observed while scanning the new data.
 852          * (Note that SSL_pending() is often used as a boolean value,
 853          * so we'd better not return -1.)
 854          */
 855         return(s->method->ssl_pending(s));
 856         }
 857
 858 X509 *SSL_get_peer_certificate(const SSL *s)
 859         {
 860         X509 *r;
 861
 862         if ((s == NULL) || (s->session == NULL))
 863                 r=NULL;
 864         else
 865                 r=s->session->peer;
 866
 867         if (r == NULL) return(r);
 868
 869         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 870
 871         return(r);
 872         }
 873
 874 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 875         {
 876         STACK_OF(X509) *r;
 877
 878         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 879                 r=NULL;
 880         else
 881                 r=s->session->sess_cert->cert_chain;
 882
 883         /* If we are a client, cert_chain includes the peer's own
 884          * certificate; if we are a server, it does not. */
 885
 886         return(r);
 887         }
 888
 889 /* Now in theory, since the calling process own 't' it should be safe to
 890  * modify.  We need to be able to read f without being hassled */
 891 void SSL_copy_session_id(SSL *t,const SSL *f)
 892         {
 893         CERT *tmp;
 894
 895         /* Do we need to to SSL locking? */
 896         SSL_set_session(t,SSL_get_session(f));
 897
 898         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 899          * vice-versa */
 900         if (t->method != f->method)
 901                 {
 902                 t->method->ssl_free(t); /* cleanup current */
 903                 t->method=f->method;    /* change method */
 904                 t->method->ssl_new(t);  /* setup new */
 905                 }
 906
 907         tmp=t->cert;
 908         if (f->cert != NULL)
 909                 {
 910                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 911                 t->cert=f->cert;
 912                 }
 913         else
 914                 t->cert=NULL;
 915         if (tmp != NULL) ssl_cert_free(tmp);
 916         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 917         }
 918
 919 /* Fix this so it checks all the valid key/cert options */
 920 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 921         {
 922         if (    (ctx == NULL) ||
 923                 (ctx->cert == NULL) ||
 924                 (ctx->cert->key->x509 == NULL))
 925                 {
 926                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 927                 return(0);
 928                 }
 929         if      (ctx->cert->key->privatekey == NULL)
 930                 {
 931                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 932                 return(0);
 933                 }
 934         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 935         }
 936
 937 /* Fix this function so that it takes an optional type parameter */
 938 int SSL_check_private_key(const SSL *ssl)
 939         {
 940         if (ssl == NULL)
 941                 {
 942                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 943                 return(0);
 944                 }
 945         if (ssl->cert == NULL)
 946                 {
 947                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 948                 return 0;
 949                 }
 950         if (ssl->cert->key->x509 == NULL)
 951                 {
 952                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 953                 return(0);
 954                 }
 955         if (ssl->cert->key->privatekey == NULL)
 956                 {
 957                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 958                 return(0);
 959                 }
 960         return(X509_check_private_key(ssl->cert->key->x509,
 961                 ssl->cert->key->privatekey));
 962         }
 963
 964 int SSL_accept(SSL *s)
 965         {
 966         if (s->handshake_func == 0)
 967                 /* Not properly initialized yet */
 968                 SSL_set_accept_state(s);
 969
 970         return(s->method->ssl_accept(s));
 971         }
 972
 973 int SSL_connect(SSL *s)
 974         {
 975         if (s->handshake_func == 0)
 976                 /* Not properly initialized yet */
 977                 SSL_set_connect_state(s);
 978
 979         return(s->method->ssl_connect(s));
 980         }
 981
 982 long SSL_get_default_timeout(const SSL *s)
 983         {
 984         return(s->method->get_timeout());
 985         }
 986
 987 int SSL_read(SSL *s,void *buf,int num)
 988         {
 989         if (s->handshake_func == 0)
 990                 {
 991                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 992                 return -1;
 993                 }
 994
 995         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 996                 {
 997                 s->rwstate=SSL_NOTHING;
 998                 return(0);
 999                 }
1000         return(s->method->ssl_read(s,buf,num));
1001         }
1002
1003 int SSL_peek(SSL *s,void *buf,int num)
1004         {
1005         if (s->handshake_func == 0)
1006                 {
1007                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1008                 return -1;
1009                 }
1010
1011         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1012                 {
1013                 return(0);
1014                 }
1015         return(s->method->ssl_peek(s,buf,num));
1016         }
1017
1018 int SSL_write(SSL *s,const void *buf,int num)
1019         {
1020         if (s->handshake_func == 0)
1021                 {
1022                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1023                 return -1;
1024                 }
1025
1026         if (s->shutdown & SSL_SENT_SHUTDOWN)
1027                 {
1028                 s->rwstate=SSL_NOTHING;
1029                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1030                 return(-1);
1031                 }
1032         return(s->method->ssl_write(s,buf,num));
1033         }
1034
1035 int SSL_shutdown(SSL *s)
1036         {
1037         /* Note that this function behaves differently from what one might
1038          * expect.  Return values are 0 for no success (yet),
1039          * 1 for success; but calling it once is usually not enough,
1040          * even if blocking I/O is used (see ssl3_shutdown).
1041          */
1042
1043         if (s->handshake_func == 0)
1044                 {
1045                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1046                 return -1;
1047                 }
1048
1049         if ((s != NULL) && !SSL_in_init(s))
1050                 return(s->method->ssl_shutdown(s));
1051         else
1052                 return(1);
1053         }
1054
1055 int SSL_renegotiate(SSL *s)
1056         {
1057         if (s->renegotiate == 0)
1058                 s->renegotiate=1;
1059
1060         s->new_session=1;
1061
1062         return(s->method->ssl_renegotiate(s));
1063         }
1064
1065 int SSL_renegotiate_abbreviated(SSL *s)
1066         {
1067         if (s->renegotiate == 0)
1068                 s->renegotiate=1;
1069
1070         s->new_session=0;
1071
1072         return(s->method->ssl_renegotiate(s));
1073         }
1074
1075 int SSL_renegotiate_pending(SSL *s)
1076         {
1077         /* becomes true when negotiation is requested;
1078          * false again once a handshake has finished */
1079         return (s->renegotiate != 0);
1080         }
1081
1082 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1083         {
1084         long l;
1085
1086         switch (cmd)
1087                 {
1088         case SSL_CTRL_GET_READ_AHEAD:
1089                 return(s->read_ahead);
1090         case SSL_CTRL_SET_READ_AHEAD:
1091                 l=s->read_ahead;
1092                 s->read_ahead=larg;
1093                 return(l);
1094
1095         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1096                 s->msg_callback_arg = parg;
1097                 return 1;
1098
1099         case SSL_CTRL_OPTIONS:
1100                 return(s->options|=larg);
1101         case SSL_CTRL_CLEAR_OPTIONS:
1102                 return(s->options&=~larg);
1103         case SSL_CTRL_MODE:
1104                 return(s->mode|=larg);
1105         case SSL_CTRL_CLEAR_MODE:
1106                 return(s->mode &=~larg);
1107         case SSL_CTRL_GET_MAX_CERT_LIST:
1108                 return(s->max_cert_list);
1109         case SSL_CTRL_SET_MAX_CERT_LIST:
1110                 l=s->max_cert_list;
1111                 s->max_cert_list=larg;
1112                 return(l);
1113         case SSL_CTRL_SET_MTU:
1114 #ifndef OPENSSL_NO_DTLS1
1115                 if (larg < (long)dtls1_min_mtu())
1116                         return 0;
1117 #endif
1118
1119                 if (SSL_version(s) == DTLS1_VERSION ||
1120                     SSL_version(s) == DTLS1_BAD_VER)
1121                         {
1122                         s->d1->mtu = larg;
1123                         return larg;
1124                         }
1125                 return 0;
1126         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1127                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1128                         return 0;
1129                 s->max_send_fragment = larg;
1130                 return 1;
1131         case SSL_CTRL_GET_RI_SUPPORT:
1132                 if (s->s3)
1133                         return s->s3->send_connection_binding;
1134                 else return 0;
1135         case SSL_CTRL_CERT_FLAGS:
1136                 return(s->cert->cert_flags|=larg);
1137         case SSL_CTRL_CLEAR_CERT_FLAGS:
1138                 return(s->cert->cert_flags &=~larg);
1139
1140         case SSL_CTRL_GET_RAW_CIPHERLIST:
1141                 if (parg)
1142                         {
1143                         if (s->cert->ciphers_raw == NULL)
1144                                 return 0;
1145                         *(unsigned char **)parg = s->cert->ciphers_raw;
1146                         return (int)s->cert->ciphers_rawlen;
1147                         }
1148                 else
1149                         return ssl_put_cipher_by_char(s,NULL,NULL);
1150 #ifndef OPENSSL_NO_DANE
1151         case SSL_CTRL_PULL_TLSA_RECORD:
1152                 parg = SSL_get_tlsa_record_byname (parg,larg,s->version<0xF000?1:0);
1153                 /* yes, fall through */
1154         case SSL_CTRL_SET_TLSA_RECORD:
1155                 s->tlsa_record = parg;
1156                 return 1;
1157 #endif
1158         default:
1159                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1160                 }
1161         }
1162
1163 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1164         {
1165         switch(cmd)
1166                 {
1167         case SSL_CTRL_SET_MSG_CALLBACK:
1168                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1169                 return 1;
1170
1171         default:
1172                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1173                 }
1174         }
1175
1176 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1177         {
1178         return ctx->sessions;
1179         }
1180
1181 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1182         {
1183         long l;
1184         /* For some cases with ctx == NULL perform syntax checks */
1185         if (ctx == NULL)
1186                 {
1187                 switch (cmd)
1188                         {
1189 #ifndef OPENSSL_NO_EC
1190                 case SSL_CTRL_SET_CURVES_LIST:
1191                         return tls1_set_curves_list(NULL, NULL, parg);
1192 #endif
1193                 case SSL_CTRL_SET_SIGALGS_LIST:
1194                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1195                         return tls1_set_sigalgs_list(NULL, parg, 0);
1196                 default:
1197                         return 0;
1198                         }
1199                 }
1200
1201         switch (cmd)
1202                 {
1203         case SSL_CTRL_GET_READ_AHEAD:
1204                 return(ctx->read_ahead);
1205         case SSL_CTRL_SET_READ_AHEAD:
1206                 l=ctx->read_ahead;
1207                 ctx->read_ahead=larg;
1208                 return(l);
1209
1210         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1211                 ctx->msg_callback_arg = parg;
1212                 return 1;
1213
1214         case SSL_CTRL_GET_MAX_CERT_LIST:
1215                 return(ctx->max_cert_list);
1216         case SSL_CTRL_SET_MAX_CERT_LIST:
1217                 l=ctx->max_cert_list;
1218                 ctx->max_cert_list=larg;
1219                 return(l);
1220
1221         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1222                 l=ctx->session_cache_size;
1223                 ctx->session_cache_size=larg;
1224                 return(l);
1225         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1226                 return(ctx->session_cache_size);
1227         case SSL_CTRL_SET_SESS_CACHE_MODE:
1228                 l=ctx->session_cache_mode;
1229                 ctx->session_cache_mode=larg;
1230                 return(l);
1231         case SSL_CTRL_GET_SESS_CACHE_MODE:
1232                 return(ctx->session_cache_mode);
1233
1234         case SSL_CTRL_SESS_NUMBER:
1235                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1236         case SSL_CTRL_SESS_CONNECT:
1237                 return(ctx->stats.sess_connect);
1238         case SSL_CTRL_SESS_CONNECT_GOOD:
1239                 return(ctx->stats.sess_connect_good);
1240         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1241                 return(ctx->stats.sess_connect_renegotiate);
1242         case SSL_CTRL_SESS_ACCEPT:
1243                 return(ctx->stats.sess_accept);
1244         case SSL_CTRL_SESS_ACCEPT_GOOD:
1245                 return(ctx->stats.sess_accept_good);
1246         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1247                 return(ctx->stats.sess_accept_renegotiate);
1248         case SSL_CTRL_SESS_HIT:
1249                 return(ctx->stats.sess_hit);
1250         case SSL_CTRL_SESS_CB_HIT:
1251                 return(ctx->stats.sess_cb_hit);
1252         case SSL_CTRL_SESS_MISSES:
1253                 return(ctx->stats.sess_miss);
1254         case SSL_CTRL_SESS_TIMEOUTS:
1255                 return(ctx->stats.sess_timeout);
1256         case SSL_CTRL_SESS_CACHE_FULL:
1257                 return(ctx->stats.sess_cache_full);
1258         case SSL_CTRL_OPTIONS:
1259                 return(ctx->options|=larg);
1260         case SSL_CTRL_CLEAR_OPTIONS:
1261                 return(ctx->options&=~larg);
1262         case SSL_CTRL_MODE:
1263                 return(ctx->mode|=larg);
1264         case SSL_CTRL_CLEAR_MODE:
1265                 return(ctx->mode&=~larg);
1266         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1267                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1268                         return 0;
1269                 ctx->max_send_fragment = larg;
1270                 return 1;
1271         case SSL_CTRL_CERT_FLAGS:
1272                 return(ctx->cert->cert_flags|=larg);
1273         case SSL_CTRL_CLEAR_CERT_FLAGS:
1274                 return(ctx->cert->cert_flags &=~larg);
1275         default:
1276                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1277                 }
1278         }
1279
1280 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1281         {
1282         switch(cmd)
1283                 {
1284         case SSL_CTRL_SET_MSG_CALLBACK:
1285                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1286                 return 1;
1287
1288         default:
1289                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1290                 }
1291         }
1292
1293 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1294         {
1295         long l;
1296
1297         l=a->id-b->id;
1298         if (l == 0L)
1299                 return(0);
1300         else
1301                 return((l > 0)?1:-1);
1302         }
1303
1304 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1305                         const SSL_CIPHER * const *bp)
1306         {
1307         long l;
1308
1309         l=(*ap)->id-(*bp)->id;
1310         if (l == 0L)
1311                 return(0);
1312         else
1313                 return((l > 0)?1:-1);
1314         }
1315
1316 /** return a STACK of the ciphers available for the SSL and in order of
1317  * preference */
1318 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1319         {
1320         if (s != NULL)
1321                 {
1322                 if (s->cipher_list != NULL)
1323                         {
1324                         return(s->cipher_list);
1325                         }
1326                 else if ((s->ctx != NULL) &&
1327                         (s->ctx->cipher_list != NULL))
1328                         {
1329                         return(s->ctx->cipher_list);
1330                         }
1331                 }
1332         return(NULL);
1333         }
1334
1335 /** return a STACK of the ciphers available for the SSL and in order of
1336  * algorithm id */
1337 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1338         {
1339         if (s != NULL)
1340                 {
1341                 if (s->cipher_list_by_id != NULL)
1342                         {
1343                         return(s->cipher_list_by_id);
1344                         }
1345                 else if ((s->ctx != NULL) &&
1346                         (s->ctx->cipher_list_by_id != NULL))
1347                         {
1348                         return(s->ctx->cipher_list_by_id);
1349                         }
1350                 }
1351         return(NULL);
1352         }
1353
1354 /** The old interface to get the same thing as SSL_get_ciphers() */
1355 const char *SSL_get_cipher_list(const SSL *s,int n)
1356         {
1357         SSL_CIPHER *c;
1358         STACK_OF(SSL_CIPHER) *sk;
1359
1360         if (s == NULL) return(NULL);
1361         sk=SSL_get_ciphers(s);
1362         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1363                 return(NULL);
1364         c=sk_SSL_CIPHER_value(sk,n);
1365         if (c == NULL) return(NULL);
1366         return(c->name);
1367         }
1368
1369 /** specify the ciphers to be used by default by the SSL_CTX */
1370 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1371         {
1372         STACK_OF(SSL_CIPHER) *sk;
1373
1374         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1375                 &ctx->cipher_list_by_id,str, ctx->cert);
1376         /* ssl_create_cipher_list may return an empty stack if it
1377          * was unable to find a cipher matching the given rule string
1378          * (for example if the rule string specifies a cipher which
1379          * has been disabled). This is not an error as far as
1380          * ssl_create_cipher_list is concerned, and hence
1381          * ctx->cipher_list and ctx->cipher_list_by_id has been
1382          * updated. */
1383         if (sk == NULL)
1384                 return 0;
1385         else if (sk_SSL_CIPHER_num(sk) == 0)
1386                 {
1387                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1388                 return 0;
1389                 }
1390         return 1;
1391         }
1392
1393 /** specify the ciphers to be used by the SSL */
1394 int SSL_set_cipher_list(SSL *s,const char *str)
1395         {
1396         STACK_OF(SSL_CIPHER) *sk;
1397
1398         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1399                 &s->cipher_list_by_id,str, s->cert);
1400         /* see comment in SSL_CTX_set_cipher_list */
1401         if (sk == NULL)
1402                 return 0;
1403         else if (sk_SSL_CIPHER_num(sk) == 0)
1404                 {
1405                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1406                 return 0;
1407                 }
1408         return 1;
1409         }
1410
1411 /* works well for SSLv2, not so good for SSLv3 */
1412 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1413         {
1414         char *p;
1415         STACK_OF(SSL_CIPHER) *sk;
1416         SSL_CIPHER *c;
1417         int i;
1418
1419         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1420                 (len < 2))
1421                 return(NULL);
1422
1423         p=buf;
1424         sk=s->session->ciphers;
1425         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1426                 {
1427                 int n;
1428
1429                 c=sk_SSL_CIPHER_value(sk,i);
1430                 n=strlen(c->name);
1431                 if (n+1 > len)
1432                         {
1433                         if (p != buf)
1434                                 --p;
1435                         *p='\0';
1436                         return buf;
1437                         }
1438                 strcpy(p,c->name);
1439                 p+=n;
1440                 *(p++)=':';
1441                 len-=n+1;
1442                 }
1443         p[-1]='\0';
1444         return(buf);
1445         }
1446
1447 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1448                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1449         {
1450         int i,j=0;
1451         SSL_CIPHER *c;
1452         CERT *ct = s->cert;
1453         unsigned char *q;
1454         int no_scsv = s->renegotiate;
1455         /* Set disabled masks for this session */
1456         ssl_set_client_disabled(s);
1457
1458         if (sk == NULL) return(0);
1459         q=p;
1460
1461         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1462                 {
1463                 c=sk_SSL_CIPHER_value(sk,i);
1464                 /* Skip disabled ciphers */
1465                 if (c->algorithm_ssl & ct->mask_ssl ||
1466                         c->algorithm_mkey & ct->mask_k ||
1467                         c->algorithm_auth & ct->mask_a)
1468                         continue;
1469 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1470                 if (c->id == SSL3_CK_SCSV)
1471                         {
1472                         if (no_scsv)
1473                                 continue;
1474                         else
1475                                 no_scsv = 1;
1476                         }
1477 #endif
1478                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1479                 p+=j;
1480                 }
1481         /* If p == q, no ciphers and caller indicates an error. Otherwise
1482          * add SCSV if not renegotiating.
1483          */
1484         if (p != q && !no_scsv)
1485                 {
1486                 static SSL_CIPHER scsv =
1487                         {
1488                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1489                         };
1490                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1491                 p+=j;
1492 #ifdef OPENSSL_RI_DEBUG
1493                 fprintf(stderr, "SCSV sent by client\n");
1494 #endif
1495                 }
1496
1497         return(p-q);
1498         }
1499
1500 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1501                                                STACK_OF(SSL_CIPHER) **skp)
1502         {
1503         const SSL_CIPHER *c;
1504         STACK_OF(SSL_CIPHER) *sk;
1505         int i,n;
1506         if (s->s3)
1507                 s->s3->send_connection_binding = 0;
1508
1509         n=ssl_put_cipher_by_char(s,NULL,NULL);
1510         if ((num%n) != 0)
1511                 {
1512                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1513                 return(NULL);
1514                 }
1515         if ((skp == NULL) || (*skp == NULL))
1516                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1517         else
1518                 {
1519                 sk= *skp;
1520                 sk_SSL_CIPHER_zero(sk);
1521                 }
1522
1523         if (s->cert->ciphers_raw)
1524                 OPENSSL_free(s->cert->ciphers_raw);
1525         s->cert->ciphers_raw = BUF_memdup(p, num);
1526         if (s->cert->ciphers_raw == NULL)
1527                 {
1528                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1529                 goto err;
1530                 }
1531         s->cert->ciphers_rawlen = (size_t)num;
1532
1533         for (i=0; i<num; i+=n)
1534                 {
1535                 /* Check for SCSV */
1536                 if (s->s3 && (n != 3 || !p[0]) &&
1537                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1538                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1539                         {
1540                         /* SCSV fatal if renegotiating */
1541                         if (s->renegotiate)
1542                                 {
1543                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1544                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1545                                 goto err;
1546                                 }
1547                         s->s3->send_connection_binding = 1;
1548                         p += n;
1549 #ifdef OPENSSL_RI_DEBUG
1550                         fprintf(stderr, "SCSV received by server\n");
1551 #endif
1552                         continue;
1553                         }
1554
1555                 c=ssl_get_cipher_by_char(s,p);
1556                 p+=n;
1557                 if (c != NULL)
1558                         {
1559                         if (!sk_SSL_CIPHER_push(sk,c))
1560                                 {
1561                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1562                                 goto err;
1563                                 }
1564                         }
1565                 }
1566
1567         if (skp != NULL)
1568                 *skp=sk;
1569         return(sk);
1570 err:
1571         if ((skp == NULL) || (*skp == NULL))
1572                 sk_SSL_CIPHER_free(sk);
1573         return(NULL);
1574         }
1575
1576
1577 #ifndef OPENSSL_NO_TLSEXT
1578 /** return a servername extension value if provided in Client Hello, or NULL.
1579  * So far, only host_name types are defined (RFC 3546).
1580  */
1581
1582 const char *SSL_get_servername(const SSL *s, const int type)
1583         {
1584         if (type != TLSEXT_NAMETYPE_host_name)
1585                 return NULL;
1586
1587         return s->session && !s->tlsext_hostname ?
1588                 s->session->tlsext_hostname :
1589                 s->tlsext_hostname;
1590         }
1591
1592 int SSL_get_servername_type(const SSL *s)
1593         {
1594         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1595                 return TLSEXT_NAMETYPE_host_name;
1596         return -1;
1597         }
1598
1599 # ifndef OPENSSL_NO_NEXTPROTONEG
1600 /* SSL_select_next_proto implements the standard protocol selection. It is
1601  * expected that this function is called from the callback set by
1602  * SSL_CTX_set_next_proto_select_cb.
1603  *
1604  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1605  * strings. The length byte itself is not included in the length. A byte
1606  * string of length 0 is invalid. No byte string may be truncated.
1607  *
1608  * The current, but experimental algorithm for selecting the protocol is:
1609  *
1610  * 1) If the server doesn't support NPN then this is indicated to the
1611  * callback. In this case, the client application has to abort the connection
1612  * or have a default application level protocol.
1613  *
1614  * 2) If the server supports NPN, but advertises an empty list then the
1615  * client selects the first protcol in its list, but indicates via the
1616  * API that this fallback case was enacted.
1617  *
1618  * 3) Otherwise, the client finds the first protocol in the server's list
1619  * that it supports and selects this protocol. This is because it's
1620  * assumed that the server has better information about which protocol
1621  * a client should use.
1622  *
1623  * 4) If the client doesn't support any of the server's advertised
1624  * protocols, then this is treated the same as case 2.
1625  *
1626  * It returns either
1627  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1628  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1629  */
1630 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)
1631         {
1632         unsigned int i, j;
1633         const unsigned char *result;
1634         int status = OPENSSL_NPN_UNSUPPORTED;
1635
1636         /* For each protocol in server preference order, see if we support it. */
1637         for (i = 0; i < server_len; )
1638                 {
1639                 for (j = 0; j < client_len; )
1640                         {
1641                         if (server[i] == client[j] &&
1642                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1643                                 {
1644                                 /* We found a match */
1645                                 result = &server[i];
1646                                 status = OPENSSL_NPN_NEGOTIATED;
1647                                 goto found;
1648                                 }
1649                         j += client[j];
1650                         j++;
1651                         }
1652                 i += server[i];
1653                 i++;
1654                 }
1655
1656         /* There's no overlap between our protocols and the server's list. */
1657         result = client;
1658         status = OPENSSL_NPN_NO_OVERLAP;
1659
1660         found:
1661         *out = (unsigned char *) result + 1;
1662         *outlen = result[0];
1663         return status;
1664         }
1665
1666 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1667  * requested protocol for this connection and returns 0. If the client didn't
1668  * request any protocol, then *data is set to NULL.
1669  *
1670  * Note that the client can request any protocol it chooses. The value returned
1671  * from this function need not be a member of the list of supported protocols
1672  * provided by the callback.
1673  */
1674 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1675         {
1676         *data = s->next_proto_negotiated;
1677         if (!*data) {
1678                 *len = 0;
1679         } else {
1680                 *len = s->next_proto_negotiated_len;
1681         }
1682 }
1683
1684 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1685  * TLS server needs a list of supported protocols for Next Protocol
1686  * Negotiation. The returned list must be in wire format.  The list is returned
1687  * by setting |out| to point to it and |outlen| to its length. This memory will
1688  * not be modified, but one should assume that the SSL* keeps a reference to
1689  * it.
1690  *
1691  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1692  * such extension will be included in the ServerHello. */
1693 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)
1694         {
1695         ctx->next_protos_advertised_cb = cb;
1696         ctx->next_protos_advertised_cb_arg = arg;
1697         }
1698
1699 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1700  * client needs to select a protocol from the server's provided list. |out|
1701  * must be set to point to the selected protocol (which may be within |in|).
1702  * The length of the protocol name must be written into |outlen|. The server's
1703  * advertised protocols are provided in |in| and |inlen|. The callback can
1704  * assume that |in| is syntactically valid.
1705  *
1706  * The client must select a protocol. It is fatal to the connection if this
1707  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1708  */
1709 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)
1710         {
1711         ctx->next_proto_select_cb = cb;
1712         ctx->next_proto_select_cb_arg = arg;
1713         }
1714 # endif
1715
1716 int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
1717                                custom_cli_ext_first_cb_fn fn1,
1718                                custom_cli_ext_second_cb_fn fn2, void* arg)
1719         {
1720         size_t i;
1721         custom_cli_ext_record* record;
1722
1723         /* Check for duplicates */
1724         for (i=0; i < ctx->custom_cli_ext_records_count; i++)
1725                 if (ext_type == ctx->custom_cli_ext_records[i].ext_type)
1726                         return 0;
1727
1728         ctx->custom_cli_ext_records = OPENSSL_realloc(ctx->custom_cli_ext_records,
1729                                                       (ctx->custom_cli_ext_records_count + 1) *
1730                                                       sizeof(custom_cli_ext_record));
1731         if (!ctx->custom_cli_ext_records) {
1732                 ctx->custom_cli_ext_records_count = 0;
1733                 return 0;
1734         }
1735         ctx->custom_cli_ext_records_count++;
1736         record = &ctx->custom_cli_ext_records[ctx->custom_cli_ext_records_count - 1];
1737         record->ext_type = ext_type;
1738         record->fn1 = fn1;
1739         record->fn2 = fn2;
1740         record->arg = arg;
1741         return 1;
1742         }
1743
1744 int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
1745                                custom_srv_ext_first_cb_fn fn1,
1746                                custom_srv_ext_second_cb_fn fn2, void* arg)
1747         {
1748         size_t i;
1749         custom_srv_ext_record* record;
1750
1751         /* Check for duplicates */
1752         for (i=0; i < ctx->custom_srv_ext_records_count; i++)
1753                 if (ext_type == ctx->custom_srv_ext_records[i].ext_type)
1754                         return 0;
1755
1756         ctx->custom_srv_ext_records = OPENSSL_realloc(ctx->custom_srv_ext_records,
1757                                                       (ctx->custom_srv_ext_records_count + 1) *
1758                                                       sizeof(custom_srv_ext_record));
1759         if (!ctx->custom_srv_ext_records) {
1760                 ctx->custom_srv_ext_records_count = 0;
1761                 return 0;
1762         }
1763         ctx->custom_srv_ext_records_count++;
1764         record = &ctx->custom_srv_ext_records[ctx->custom_srv_ext_records_count - 1];
1765         record->ext_type = ext_type;
1766         record->fn1 = fn1;
1767         record->fn2 = fn2;
1768         record->arg = arg;
1769         return 1;
1770         }
1771
1772 #endif
1773
1774 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1775         const char *label, size_t llen, const unsigned char *p, size_t plen,
1776         int use_context)
1777         {
1778         if (s->version < TLS1_VERSION)
1779                 return -1;
1780
1781         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1782                                                            llen, p, plen,
1783                                                            use_context);
1784         }
1785
1786 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1787         {
1788         unsigned long l;
1789
1790         l=(unsigned long)
1791                 ((unsigned int) a->session_id[0]     )|
1792                 ((unsigned int) a->session_id[1]<< 8L)|
1793                 ((unsigned long)a->session_id[2]<<16L)|
1794                 ((unsigned long)a->session_id[3]<<24L);
1795         return(l);
1796         }
1797
1798 /* NB: If this function (or indeed the hash function which uses a sort of
1799  * coarser function than this one) is changed, ensure
1800  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1801  * able to construct an SSL_SESSION that will collide with any existing session
1802  * with a matching session ID. */
1803 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1804         {
1805         if (a->ssl_version != b->ssl_version)
1806                 return(1);
1807         if (a->session_id_length != b->session_id_length)
1808                 return(1);
1809         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1810         }
1811
1812 /* These wrapper functions should remain rather than redeclaring
1813  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1814  * variable. The reason is that the functions aren't static, they're exposed via
1815  * ssl.h. */
1816 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1817 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1818
1819 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1820         {
1821         SSL_CTX *ret=NULL;
1822
1823         if (meth == NULL)
1824                 {
1825                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1826                 return(NULL);
1827                 }
1828
1829 #ifdef OPENSSL_FIPS
1830         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1831                 {
1832                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1833                 return NULL;
1834                 }
1835 #endif
1836
1837         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1838                 {
1839                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1840                 goto err;
1841                 }
1842         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1843         if (ret == NULL)
1844                 goto err;
1845
1846         memset(ret,0,sizeof(SSL_CTX));
1847
1848         ret->method=meth;
1849
1850         ret->cert_store=NULL;
1851         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1852         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1853         ret->session_cache_head=NULL;
1854         ret->session_cache_tail=NULL;
1855
1856         /* We take the system default */
1857         ret->session_timeout=meth->get_timeout();
1858
1859         ret->new_session_cb=0;
1860         ret->remove_session_cb=0;
1861         ret->get_session_cb=0;
1862         ret->generate_session_id=0;
1863
1864         memset((char *)&ret->stats,0,sizeof(ret->stats));
1865
1866         ret->references=1;
1867         ret->quiet_shutdown=0;
1868
1869 /*      ret->cipher=NULL;*/
1870 /*      ret->s2->challenge=NULL;
1871         ret->master_key=NULL;
1872         ret->key_arg=NULL;
1873         ret->s2->conn_id=NULL; */
1874
1875         ret->info_callback=NULL;
1876
1877         ret->app_verify_callback=0;
1878         ret->app_verify_arg=NULL;
1879
1880         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1881         ret->read_ahead=0;
1882         ret->msg_callback=0;
1883         ret->msg_callback_arg=NULL;
1884         ret->verify_mode=SSL_VERIFY_NONE;
1885 #if 0
1886         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1887 #endif
1888         ret->sid_ctx_length=0;
1889         ret->default_verify_callback=NULL;
1890         if ((ret->cert=ssl_cert_new()) == NULL)
1891                 goto err;
1892
1893         ret->default_passwd_callback=0;
1894         ret->default_passwd_callback_userdata=NULL;
1895         ret->client_cert_cb=0;
1896         ret->app_gen_cookie_cb=0;
1897         ret->app_verify_cookie_cb=0;
1898
1899         ret->sessions=lh_SSL_SESSION_new();
1900         if (ret->sessions == NULL) goto err;
1901         ret->cert_store=X509_STORE_new();
1902         if (ret->cert_store == NULL) goto err;
1903
1904         ssl_create_cipher_list(ret->method,
1905                 &ret->cipher_list,&ret->cipher_list_by_id,
1906                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1907         if (ret->cipher_list == NULL
1908             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1909                 {
1910                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1911                 goto err2;
1912                 }
1913
1914         ret->param = X509_VERIFY_PARAM_new();
1915         if (!ret->param)
1916                 goto err;
1917
1918         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1919                 {
1920                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1921                 goto err2;
1922                 }
1923         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1924                 {
1925                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1926                 goto err2;
1927                 }
1928         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1929                 {
1930                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1931                 goto err2;
1932                 }
1933
1934         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1935                 goto err;
1936
1937         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1938
1939         ret->extra_certs=NULL;
1940         /* No compression for DTLS */
1941         if (meth->version != DTLS1_VERSION)
1942                 ret->comp_methods=SSL_COMP_get_compression_methods();
1943
1944         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1945
1946 #ifndef OPENSSL_NO_TLSEXT
1947         ret->tlsext_servername_callback = 0;
1948         ret->tlsext_servername_arg = NULL;
1949         /* Setup RFC4507 ticket keys */
1950         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1951                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1952                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1953                 ret->options |= SSL_OP_NO_TICKET;
1954
1955         ret->tlsext_status_cb = 0;
1956         ret->tlsext_status_arg = NULL;
1957
1958 # ifndef OPENSSL_NO_NEXTPROTONEG
1959         ret->next_protos_advertised_cb = 0;
1960         ret->next_proto_select_cb = 0;
1961 # endif
1962 #endif
1963 #ifndef OPENSSL_NO_PSK
1964         ret->psk_identity_hint=NULL;
1965         ret->psk_client_callback=NULL;
1966         ret->psk_server_callback=NULL;
1967 #endif
1968 #ifndef OPENSSL_NO_SRP
1969         SSL_CTX_SRP_CTX_init(ret);
1970 #endif
1971         ret->custom_cli_ext_records = NULL;
1972         ret->custom_cli_ext_records_count = 0;
1973         ret->custom_srv_ext_records = NULL;
1974         ret->custom_srv_ext_records_count = 0;
1975 #ifndef OPENSSL_NO_BUF_FREELISTS
1976         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1977         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1978         if (!ret->rbuf_freelist)
1979                 goto err;
1980         ret->rbuf_freelist->chunklen = 0;
1981         ret->rbuf_freelist->len = 0;
1982         ret->rbuf_freelist->head = NULL;
1983         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1984         if (!ret->wbuf_freelist)
1985                 {
1986                 OPENSSL_free(ret->rbuf_freelist);
1987                 goto err;
1988                 }
1989         ret->wbuf_freelist->chunklen = 0;
1990         ret->wbuf_freelist->len = 0;
1991         ret->wbuf_freelist->head = NULL;
1992 #endif
1993 #ifndef OPENSSL_NO_ENGINE
1994         ret->client_cert_engine = NULL;
1995 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1996 #define eng_strx(x)     #x
1997 #define eng_str(x)      eng_strx(x)
1998         /* Use specific client engine automatically... ignore errors */
1999         {
2000         ENGINE *eng;
2001         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2002         if (!eng)
2003                 {
2004                 ERR_clear_error();
2005                 ENGINE_load_builtin_engines();
2006                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2007                 }
2008         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2009                 ERR_clear_error();
2010         }
2011 #endif
2012 #endif
2013         /* Default is to connect to non-RI servers. When RI is more widely
2014          * deployed might change this.
2015          */
2016         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2017
2018         return(ret);
2019 err:
2020         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2021 err2:
2022         if (ret != NULL) SSL_CTX_free(ret);
2023         return(NULL);
2024         }
2025
2026 #if 0
2027 static void SSL_COMP_free(SSL_COMP *comp)
2028     { OPENSSL_free(comp); }
2029 #endif
2030
2031 #ifndef OPENSSL_NO_BUF_FREELISTS
2032 static void
2033 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2034         {
2035         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2036         for (ent = list->head; ent; ent = next)
2037                 {
2038                 next = ent->next;
2039                 OPENSSL_free(ent);
2040                 }
2041         OPENSSL_free(list);
2042         }
2043 #endif
2044
2045 void SSL_CTX_free(SSL_CTX *a)
2046         {
2047         int i;
2048
2049         if (a == NULL) return;
2050
2051         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2052 #ifdef REF_PRINT
2053         REF_PRINT("SSL_CTX",a);
2054 #endif
2055         if (i > 0) return;
2056 #ifdef REF_CHECK
2057         if (i < 0)
2058                 {
2059                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2060                 abort(); /* ok */
2061                 }
2062 #endif
2063
2064         if (a->param)
2065                 X509_VERIFY_PARAM_free(a->param);
2066
2067         /*
2068          * Free internal session cache. However: the remove_cb() may reference
2069          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2070          * after the sessions were flushed.
2071          * As the ex_data handling routines might also touch the session cache,
2072          * the most secure solution seems to be: empty (flush) the cache, then
2073          * free ex_data, then finally free the cache.
2074          * (See ticket [openssl.org #212].)
2075          */
2076         if (a->sessions != NULL)
2077                 SSL_CTX_flush_sessions(a,0);
2078
2079         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2080
2081         if (a->sessions != NULL)
2082                 lh_SSL_SESSION_free(a->sessions);
2083
2084         if (a->cert_store != NULL)
2085                 X509_STORE_free(a->cert_store);
2086         if (a->cipher_list != NULL)
2087                 sk_SSL_CIPHER_free(a->cipher_list);
2088         if (a->cipher_list_by_id != NULL)
2089                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2090         if (a->cert != NULL)
2091                 ssl_cert_free(a->cert);
2092         if (a->client_CA != NULL)
2093                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2094         if (a->extra_certs != NULL)
2095                 sk_X509_pop_free(a->extra_certs,X509_free);
2096 #if 0 /* This should never be done, since it removes a global database */
2097         if (a->comp_methods != NULL)
2098                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2099 #else
2100         a->comp_methods = NULL;
2101 #endif
2102
2103         if (a->srtp_profiles)
2104                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2105
2106 #ifndef OPENSSL_NO_PSK
2107         if (a->psk_identity_hint)
2108                 OPENSSL_free(a->psk_identity_hint);
2109 #endif
2110 #ifndef OPENSSL_NO_SRP
2111         SSL_CTX_SRP_CTX_free(a);
2112 #endif
2113 #ifndef OPENSSL_NO_TLSEXT
2114         OPENSSL_free(a->custom_cli_ext_records);
2115         OPENSSL_free(a->custom_srv_ext_records);
2116 #endif
2117 #ifndef OPENSSL_NO_ENGINE
2118         if (a->client_cert_engine)
2119                 ENGINE_finish(a->client_cert_engine);
2120 #endif
2121
2122 #ifndef OPENSSL_NO_BUF_FREELISTS
2123         if (a->wbuf_freelist)
2124                 ssl_buf_freelist_free(a->wbuf_freelist);
2125         if (a->rbuf_freelist)
2126                 ssl_buf_freelist_free(a->rbuf_freelist);
2127 #endif
2128 #ifndef OPENSSL_NO_TLSEXT
2129 # ifndef OPENSSL_NO_EC
2130         if (a->tlsext_ecpointformatlist)
2131                 OPENSSL_free(a->tlsext_ecpointformatlist);
2132         if (a->tlsext_ellipticcurvelist)
2133                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2134 # endif /* OPENSSL_NO_EC */
2135 #endif
2136
2137         OPENSSL_free(a);
2138         }
2139
2140 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2141         {
2142         ctx->default_passwd_callback=cb;
2143         }
2144
2145 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2146         {
2147         ctx->default_passwd_callback_userdata=u;
2148         }
2149
2150 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2151         {
2152         ctx->app_verify_callback=cb;
2153         ctx->app_verify_arg=arg;
2154         }
2155
2156 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2157         {
2158         ctx->verify_mode=mode;
2159         ctx->default_verify_callback=cb;
2160         }
2161
2162 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2163         {
2164         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2165         }
2166
2167 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2168         {
2169         ssl_cert_set_cert_cb(c->cert, cb, arg);
2170         }
2171
2172 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2173         {
2174         ssl_cert_set_cert_cb(s->cert, cb, arg);
2175         }
2176
2177 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2178         {
2179         CERT_PKEY *cpk;
2180         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2181         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2182         int rsa_tmp_export,dh_tmp_export,kl;
2183         unsigned long mask_k,mask_a,emask_k,emask_a;
2184 #ifndef OPENSSL_NO_ECDSA
2185         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2186 #endif
2187 #ifndef OPENSSL_NO_ECDH
2188         int have_ecdh_tmp, ecdh_ok;
2189 #endif
2190 #ifndef OPENSSL_NO_EC
2191         X509 *x = NULL;
2192         EVP_PKEY *ecc_pkey = NULL;
2193         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2194 #endif
2195         if (c == NULL) return;
2196
2197         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2198
2199 #ifndef OPENSSL_NO_RSA
2200         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2201         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2202                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2203 #else
2204         rsa_tmp=rsa_tmp_export=0;
2205 #endif
2206 #ifndef OPENSSL_NO_DH
2207         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2208         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2209                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2210 #else
2211         dh_tmp=dh_tmp_export=0;
2212 #endif
2213
2214 #ifndef OPENSSL_NO_ECDH
2215         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2216 #endif
2217         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2218         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2219         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2220         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2221         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2222         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2223         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2224         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2225         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2226         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2227         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2228 /* FIX THIS EAY EAY EAY */
2229         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2230         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2231         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2232 #ifndef OPENSSL_NO_EC
2233         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2234 #endif
2235         mask_k=0;
2236         mask_a=0;
2237         emask_k=0;
2238         emask_a=0;
2239
2240
2241
2242 #ifdef CIPHER_DEBUG
2243         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2244                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2245                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2246 #endif
2247
2248         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2249         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2250                 mask_k |= SSL_kGOST;
2251                 mask_a |= SSL_aGOST01;
2252         }
2253         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2254         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2255                 mask_k |= SSL_kGOST;
2256                 mask_a |= SSL_aGOST94;
2257         }
2258
2259         if (rsa_enc || (rsa_tmp && rsa_sign))
2260                 mask_k|=SSL_kRSA;
2261         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2262                 emask_k|=SSL_kRSA;
2263
2264 #if 0
2265         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2266         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2267                 (rsa_enc || rsa_sign || dsa_sign))
2268                 mask_k|=SSL_kEDH;
2269         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2270                 (rsa_enc || rsa_sign || dsa_sign))
2271                 emask_k|=SSL_kEDH;
2272 #endif
2273
2274         if (dh_tmp_export)
2275                 emask_k|=SSL_kEDH;
2276
2277         if (dh_tmp)
2278                 mask_k|=SSL_kEDH;
2279
2280         if (dh_rsa) mask_k|=SSL_kDHr;
2281         if (dh_rsa_export) emask_k|=SSL_kDHr;
2282
2283         if (dh_dsa) mask_k|=SSL_kDHd;
2284         if (dh_dsa_export) emask_k|=SSL_kDHd;
2285
2286         if (emask_k & (SSL_kDHr|SSL_kDHd))
2287                 mask_a |= SSL_aDH;
2288
2289         if (rsa_enc || rsa_sign)
2290                 {
2291                 mask_a|=SSL_aRSA;
2292                 emask_a|=SSL_aRSA;
2293                 }
2294
2295         if (dsa_sign)
2296                 {
2297                 mask_a|=SSL_aDSS;
2298                 emask_a|=SSL_aDSS;
2299                 }
2300
2301         mask_a|=SSL_aNULL;
2302         emask_a|=SSL_aNULL;
2303
2304 #ifndef OPENSSL_NO_KRB5
2305         mask_k|=SSL_kKRB5;
2306         mask_a|=SSL_aKRB5;
2307         emask_k|=SSL_kKRB5;
2308         emask_a|=SSL_aKRB5;
2309 #endif
2310
2311         /* An ECC certificate may be usable for ECDH and/or
2312          * ECDSA cipher suites depending on the key usage extension.
2313          */
2314 #ifndef OPENSSL_NO_EC
2315         if (have_ecc_cert)
2316                 {
2317                 cpk = &c->pkeys[SSL_PKEY_ECC];
2318                 x = cpk->x509;
2319                 /* This call populates extension flags (ex_flags) */
2320                 X509_check_purpose(x, -1, 0);
2321                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2322                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2323                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2324                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2325                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2326                         ecdsa_ok = 0;
2327                 ecc_pkey = X509_get_pubkey(x);
2328                 ecc_pkey_size = (ecc_pkey != NULL) ?
2329                     EVP_PKEY_bits(ecc_pkey) : 0;
2330                 EVP_PKEY_free(ecc_pkey);
2331                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2332                         {
2333                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2334                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2335                         }
2336 #ifndef OPENSSL_NO_ECDH
2337                 if (ecdh_ok)
2338                         {
2339
2340                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2341                                 {
2342                                 mask_k|=SSL_kECDHr;
2343                                 mask_a|=SSL_aECDH;
2344                                 if (ecc_pkey_size <= 163)
2345                                         {
2346                                         emask_k|=SSL_kECDHr;
2347                                         emask_a|=SSL_aECDH;
2348                                         }
2349                                 }
2350
2351                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2352                                 {
2353                                 mask_k|=SSL_kECDHe;
2354                                 mask_a|=SSL_aECDH;
2355                                 if (ecc_pkey_size <= 163)
2356                                         {
2357                                         emask_k|=SSL_kECDHe;
2358                                         emask_a|=SSL_aECDH;
2359                                         }
2360                                 }
2361                         }
2362 #endif
2363 #ifndef OPENSSL_NO_ECDSA
2364                 if (ecdsa_ok)
2365                         {
2366                         mask_a|=SSL_aECDSA;
2367                         emask_a|=SSL_aECDSA;
2368                         }
2369 #endif
2370                 }
2371 #endif
2372
2373 #ifndef OPENSSL_NO_ECDH
2374         if (have_ecdh_tmp)
2375                 {
2376                 mask_k|=SSL_kEECDH;
2377                 emask_k|=SSL_kEECDH;
2378                 }
2379 #endif
2380
2381 #ifndef OPENSSL_NO_PSK
2382         mask_k |= SSL_kPSK;
2383         mask_a |= SSL_aPSK;
2384         emask_k |= SSL_kPSK;
2385         emask_a |= SSL_aPSK;
2386 #endif
2387
2388         c->mask_k=mask_k;
2389         c->mask_a=mask_a;
2390         c->export_mask_k=emask_k;
2391         c->export_mask_a=emask_a;
2392         c->valid=1;
2393         }
2394
2395 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2396 #define ku_reject(x, usage) \
2397         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2398
2399 #ifndef OPENSSL_NO_EC
2400
2401 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2402         {
2403         unsigned long alg_k, alg_a;
2404         EVP_PKEY *pkey = NULL;
2405         int keysize = 0;
2406         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2407         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2408
2409         alg_k = cs->algorithm_mkey;
2410         alg_a = cs->algorithm_auth;
2411
2412         if (SSL_C_IS_EXPORT(cs))
2413                 {
2414                 /* ECDH key length in export ciphers must be <= 163 bits */
2415                 pkey = X509_get_pubkey(x);
2416                 if (pkey == NULL) return 0;
2417                 keysize = EVP_PKEY_bits(pkey);
2418                 EVP_PKEY_free(pkey);
2419                 if (keysize > 163) return 0;
2420                 }
2421
2422         /* This call populates the ex_flags field correctly */
2423         X509_check_purpose(x, -1, 0);
2424         if ((x->sig_alg) && (x->sig_alg->algorithm))
2425                 {
2426                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2427                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2428                 }
2429         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2430                 {
2431                 /* key usage, if present, must allow key agreement */
2432                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2433                         {
2434                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2435                         return 0;
2436                         }
2437                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2438                         {
2439                         /* signature alg must be ECDSA */
2440                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2441                                 {
2442                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2443                                 return 0;
2444                                 }
2445                         }
2446                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2447                         {
2448                         /* signature alg must be RSA */
2449
2450                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2451                                 {
2452                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2453                                 return 0;
2454                                 }
2455                         }
2456                 }
2457         if (alg_a & SSL_aECDSA)
2458                 {
2459                 /* key usage, if present, must allow signing */
2460                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2461                         {
2462                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2463                         return 0;
2464                         }
2465                 }
2466
2467         return 1;  /* all checks are ok */
2468         }
2469
2470 #endif
2471
2472 static int ssl_get_server_cert_index(const SSL *s)
2473         {
2474         int idx;
2475         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2476         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2477                 idx = SSL_PKEY_RSA_SIGN;
2478         if (idx == -1)
2479                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2480         return idx;
2481         }
2482
2483 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2484         {
2485         CERT *c;
2486         int i;
2487
2488         c = s->cert;
2489         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2490
2491 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2492         /* Broken protocol test: return last used certificate: which may
2493          * mismatch the one expected.
2494          */
2495         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2496                 return c->key;
2497 #endif
2498
2499         i = ssl_get_server_cert_index(s);
2500
2501         /* This may or may not be an error. */
2502         if (i < 0)
2503                 return NULL;
2504
2505         /* May be NULL. */
2506         return &c->pkeys[i];
2507         }
2508
2509 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2510         {
2511         unsigned long alg_a;
2512         CERT *c;
2513         int idx = -1;
2514
2515         alg_a = cipher->algorithm_auth;
2516         c=s->cert;
2517
2518 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2519         /* Broken protocol test: use last key: which may
2520          * mismatch the one expected.
2521          */
2522         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2523                 idx = c->key - c->pkeys;
2524         else
2525 #endif
2526
2527         if ((alg_a & SSL_aDSS) &&
2528                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2529                 idx = SSL_PKEY_DSA_SIGN;
2530         else if (alg_a & SSL_aRSA)
2531                 {
2532                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2533                         idx = SSL_PKEY_RSA_SIGN;
2534                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2535                         idx = SSL_PKEY_RSA_ENC;
2536                 }
2537         else if ((alg_a & SSL_aECDSA) &&
2538                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2539                 idx = SSL_PKEY_ECC;
2540         if (idx == -1)
2541                 {
2542                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2543                 return(NULL);
2544                 }
2545         if (pmd)
2546                 *pmd = c->pkeys[idx].digest;
2547         return c->pkeys[idx].privatekey;
2548         }
2549
2550 #ifndef OPENSSL_NO_TLSEXT
2551 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2552         {
2553         CERT *c;
2554         int i;
2555
2556         c = s->cert;
2557         i = ssl_get_server_cert_index(s);
2558
2559         if (i == -1)
2560                 return NULL;
2561
2562         *authz_length = 0;
2563         if (c->pkeys[i].authz == NULL)
2564                 return(NULL);
2565         *authz_length = c->pkeys[i].authz_length;
2566
2567         return c->pkeys[i].authz;
2568         }
2569
2570 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2571                                    size_t *serverinfo_length)
2572         {
2573         CERT *c = NULL;
2574         int i = 0;
2575         *serverinfo_length = 0;
2576
2577         c = s->cert;
2578         i = ssl_get_server_cert_index(s);
2579
2580         if (i == -1)
2581                 return 0;
2582         if (c->pkeys[i].serverinfo == NULL)
2583                 return 0;
2584
2585         *serverinfo = c->pkeys[i].serverinfo;
2586         *serverinfo_length = c->pkeys[i].serverinfo_length;
2587         return 1;
2588         }
2589 #endif
2590
2591 void ssl_update_cache(SSL *s,int mode)
2592         {
2593         int i;
2594
2595         /* If the session_id_length is 0, we are not supposed to cache it,
2596          * and it would be rather hard to do anyway :-) */
2597         if (s->session->session_id_length == 0) return;
2598
2599         i=s->session_ctx->session_cache_mode;
2600         if ((i & mode) && (!s->hit)
2601                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2602                     || SSL_CTX_add_session(s->session_ctx,s->session))
2603                 && (s->session_ctx->new_session_cb != NULL))
2604                 {
2605                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2606                 if (!s->session_ctx->new_session_cb(s,s->session))
2607                         SSL_SESSION_free(s->session);
2608                 }
2609
2610         /* auto flush every 255 connections */
2611         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2612                 ((i & mode) == mode))
2613                 {
2614                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2615                         ?s->session_ctx->stats.sess_connect_good
2616                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2617                         {
2618                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2619                         }
2620                 }
2621         }
2622
2623 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2624         {
2625         return(s->method);
2626         }
2627
2628 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2629         {
2630         int conn= -1;
2631         int ret=1;
2632
2633         if (s->method != meth)
2634                 {
2635                 if (s->handshake_func != NULL)
2636                         conn=(s->handshake_func == s->method->ssl_connect);
2637
2638                 if (s->method->version == meth->version)
2639                         s->method=meth;
2640                 else
2641                         {
2642                         s->method->ssl_free(s);
2643                         s->method=meth;
2644                         ret=s->method->ssl_new(s);
2645                         }
2646
2647                 if (conn == 1)
2648                         s->handshake_func=meth->ssl_connect;
2649                 else if (conn == 0)
2650                         s->handshake_func=meth->ssl_accept;
2651                 }
2652         return(ret);
2653         }
2654
2655 int SSL_get_error(const SSL *s,int i)
2656         {
2657         int reason;
2658         unsigned long l;
2659         BIO *bio;
2660
2661         if (i > 0) return(SSL_ERROR_NONE);
2662
2663         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2664          * etc, where we do encode the error */
2665         if ((l=ERR_peek_error()) != 0)
2666                 {
2667                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2668                         return(SSL_ERROR_SYSCALL);
2669                 else
2670                         return(SSL_ERROR_SSL);
2671                 }
2672
2673         if ((i < 0) && SSL_want_read(s))
2674                 {
2675                 bio=SSL_get_rbio(s);
2676                 if (BIO_should_read(bio))
2677                         return(SSL_ERROR_WANT_READ);
2678                 else if (BIO_should_write(bio))
2679                         /* This one doesn't make too much sense ... We never try
2680                          * to write to the rbio, and an application program where
2681                          * rbio and wbio are separate couldn't even know what it
2682                          * should wait for.
2683                          * However if we ever set s->rwstate incorrectly
2684                          * (so that we have SSL_want_read(s) instead of
2685                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2686                          * this test works around that bug; so it might be safer
2687                          * to keep it. */
2688                         return(SSL_ERROR_WANT_WRITE);
2689                 else if (BIO_should_io_special(bio))
2690                         {
2691                         reason=BIO_get_retry_reason(bio);
2692                         if (reason == BIO_RR_CONNECT)
2693                                 return(SSL_ERROR_WANT_CONNECT);
2694                         else if (reason == BIO_RR_ACCEPT)
2695                                 return(SSL_ERROR_WANT_ACCEPT);
2696                         else
2697                                 return(SSL_ERROR_SYSCALL); /* unknown */
2698                         }
2699                 }
2700
2701         if ((i < 0) && SSL_want_write(s))
2702                 {
2703                 bio=SSL_get_wbio(s);
2704                 if (BIO_should_write(bio))
2705                         return(SSL_ERROR_WANT_WRITE);
2706                 else if (BIO_should_read(bio))
2707                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2708                         return(SSL_ERROR_WANT_READ);
2709                 else if (BIO_should_io_special(bio))
2710                         {
2711                         reason=BIO_get_retry_reason(bio);
2712                         if (reason == BIO_RR_CONNECT)
2713                                 return(SSL_ERROR_WANT_CONNECT);
2714                         else if (reason == BIO_RR_ACCEPT)
2715                                 return(SSL_ERROR_WANT_ACCEPT);
2716                         else
2717                                 return(SSL_ERROR_SYSCALL);
2718                         }
2719                 }
2720         if ((i < 0) && SSL_want_x509_lookup(s))
2721                 {
2722                 return(SSL_ERROR_WANT_X509_LOOKUP);
2723                 }
2724
2725         if (i == 0)
2726                 {
2727                 if (s->version == SSL2_VERSION)
2728                         {
2729                         /* assume it is the socket being closed */
2730                         return(SSL_ERROR_ZERO_RETURN);
2731                         }
2732                 else
2733                         {
2734                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2735                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2736                                 return(SSL_ERROR_ZERO_RETURN);
2737                         }
2738                 }
2739         return(SSL_ERROR_SYSCALL);
2740         }
2741
2742 int SSL_do_handshake(SSL *s)
2743         {
2744         int ret=1;
2745
2746         if (s->handshake_func == NULL)
2747                 {
2748                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2749                 return(-1);
2750                 }
2751
2752         s->method->ssl_renegotiate_check(s);
2753
2754         if (SSL_in_init(s) || SSL_in_before(s))
2755                 {
2756                 ret=s->handshake_func(s);
2757                 }
2758         return(ret);
2759         }
2760
2761 /* For the next 2 functions, SSL_clear() sets shutdown and so
2762  * one of these calls will reset it */
2763 void SSL_set_accept_state(SSL *s)
2764         {
2765         s->server=1;
2766         s->shutdown=0;
2767         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2768         s->handshake_func=s->method->ssl_accept;
2769         /* clear the current cipher */
2770         ssl_clear_cipher_ctx(s);
2771         ssl_clear_hash_ctx(&s->read_hash);
2772         ssl_clear_hash_ctx(&s->write_hash);
2773         }
2774
2775 void SSL_set_connect_state(SSL *s)
2776         {
2777         s->server=0;
2778         s->shutdown=0;
2779         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2780         s->handshake_func=s->method->ssl_connect;
2781         /* clear the current cipher */
2782         ssl_clear_cipher_ctx(s);
2783         ssl_clear_hash_ctx(&s->read_hash);
2784         ssl_clear_hash_ctx(&s->write_hash);
2785         }
2786
2787 int ssl_undefined_function(SSL *s)
2788         {
2789         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2790         return(0);
2791         }
2792
2793 int ssl_undefined_void_function(void)
2794         {
2795         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2796         return(0);
2797         }
2798
2799 int ssl_undefined_const_function(const SSL *s)
2800         {
2801         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2802         return(0);
2803         }
2804
2805 SSL_METHOD *ssl_bad_method(int ver)
2806         {
2807         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2808         return(NULL);
2809         }
2810
2811 const char *SSL_get_version(const SSL *s)
2812         {
2813         if (s->version == TLS1_2_VERSION)
2814                 return("TLSv1.2");
2815         else if (s->version == TLS1_1_VERSION)
2816                 return("TLSv1.1");
2817         else if (s->version == TLS1_VERSION)
2818                 return("TLSv1");
2819         else if (s->version == SSL3_VERSION)
2820                 return("SSLv3");
2821         else if (s->version == SSL2_VERSION)
2822                 return("SSLv2");
2823         else
2824                 return("unknown");
2825         }
2826
2827 SSL *SSL_dup(SSL *s)
2828         {
2829         STACK_OF(X509_NAME) *sk;
2830         X509_NAME *xn;
2831         SSL *ret;
2832         int i;
2833
2834         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2835             return(NULL);
2836
2837         ret->version = s->version;
2838         ret->type = s->type;
2839         ret->method = s->method;
2840
2841         if (s->session != NULL)
2842                 {
2843                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2844                 SSL_copy_session_id(ret,s);
2845                 }
2846         else
2847                 {
2848                 /* No session has been established yet, so we have to expect
2849                  * that s->cert or ret->cert will be changed later --
2850                  * they should not both point to the same object,
2851                  * and thus we can't use SSL_copy_session_id. */
2852
2853                 ret->method->ssl_free(ret);
2854                 ret->method = s->method;
2855                 ret->method->ssl_new(ret);
2856
2857                 if (s->cert != NULL)
2858                         {
2859                         if (ret->cert != NULL)
2860                                 {
2861                                 ssl_cert_free(ret->cert);
2862                                 }
2863                         ret->cert = ssl_cert_dup(s->cert);
2864                         if (ret->cert == NULL)
2865                                 goto err;
2866                         }
2867
2868                 SSL_set_session_id_context(ret,
2869                         s->sid_ctx, s->sid_ctx_length);
2870                 }
2871
2872         ret->options=s->options;
2873         ret->mode=s->mode;
2874         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2875         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2876         ret->msg_callback = s->msg_callback;
2877         ret->msg_callback_arg = s->msg_callback_arg;
2878         SSL_set_verify(ret,SSL_get_verify_mode(s),
2879                 SSL_get_verify_callback(s));
2880         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2881         ret->generate_session_id = s->generate_session_id;
2882
2883         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2884
2885         ret->debug=s->debug;
2886
2887         /* copy app data, a little dangerous perhaps */
2888         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2889                 goto err;
2890
2891         /* setup rbio, and wbio */
2892         if (s->rbio != NULL)
2893                 {
2894                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2895                         goto err;
2896                 }
2897         if (s->wbio != NULL)
2898                 {
2899                 if (s->wbio != s->rbio)
2900                         {
2901                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2902                                 goto err;
2903                         }
2904                 else
2905                         ret->wbio=ret->rbio;
2906                 }
2907         ret->rwstate = s->rwstate;
2908         ret->in_handshake = s->in_handshake;
2909         ret->handshake_func = s->handshake_func;
2910         ret->server = s->server;
2911         ret->renegotiate = s->renegotiate;
2912         ret->new_session = s->new_session;
2913         ret->quiet_shutdown = s->quiet_shutdown;
2914         ret->shutdown=s->shutdown;
2915         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2916         ret->rstate=s->rstate;
2917         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2918         ret->hit=s->hit;
2919
2920         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2921
2922         /* dup the cipher_list and cipher_list_by_id stacks */
2923         if (s->cipher_list != NULL)
2924                 {
2925                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2926                         goto err;
2927                 }
2928         if (s->cipher_list_by_id != NULL)
2929                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2930                         == NULL)
2931                         goto err;
2932
2933         /* Dup the client_CA list */
2934         if (s->client_CA != NULL)
2935                 {
2936                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2937                 ret->client_CA=sk;
2938                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2939                         {
2940                         xn=sk_X509_NAME_value(sk,i);
2941                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2942                                 {
2943                                 X509_NAME_free(xn);
2944                                 goto err;
2945                                 }
2946                         }
2947                 }
2948
2949         if (0)
2950                 {
2951 err:
2952                 if (ret != NULL) SSL_free(ret);
2953                 ret=NULL;
2954                 }
2955         return(ret);
2956         }
2957
2958 void ssl_clear_cipher_ctx(SSL *s)
2959         {
2960         if (s->enc_read_ctx != NULL)
2961                 {
2962                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2963                 OPENSSL_free(s->enc_read_ctx);
2964                 s->enc_read_ctx=NULL;
2965                 }
2966         if (s->enc_write_ctx != NULL)
2967                 {
2968                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2969                 OPENSSL_free(s->enc_write_ctx);
2970                 s->enc_write_ctx=NULL;
2971                 }
2972 #ifndef OPENSSL_NO_COMP
2973         if (s->expand != NULL)
2974                 {
2975                 COMP_CTX_free(s->expand);
2976                 s->expand=NULL;
2977                 }
2978         if (s->compress != NULL)
2979                 {
2980                 COMP_CTX_free(s->compress);
2981                 s->compress=NULL;
2982                 }
2983 #endif
2984         }
2985
2986 /* Fix this function so that it takes an optional type parameter */
2987 X509 *SSL_get_certificate(const SSL *s)
2988         {
2989         if (s->cert != NULL)
2990                 return(s->cert->key->x509);
2991         else
2992                 return(NULL);
2993         }
2994
2995 /* Fix this function so that it takes an optional type parameter */
2996 EVP_PKEY *SSL_get_privatekey(SSL *s)
2997         {
2998         if (s->cert != NULL)
2999                 return(s->cert->key->privatekey);
3000         else
3001                 return(NULL);
3002         }
3003
3004 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3005         {
3006         if ((s->session != NULL) && (s->session->cipher != NULL))
3007                 return(s->session->cipher);
3008         return(NULL);
3009         }
3010 #ifdef OPENSSL_NO_COMP
3011 const void *SSL_get_current_compression(SSL *s)
3012         {
3013         return NULL;
3014         }
3015 const void *SSL_get_current_expansion(SSL *s)
3016         {
3017         return NULL;
3018         }
3019 #else
3020
3021 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3022         {
3023         if (s->compress != NULL)
3024                 return(s->compress->meth);
3025         return(NULL);
3026         }
3027
3028 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3029         {
3030         if (s->expand != NULL)
3031                 return(s->expand->meth);
3032         return(NULL);
3033         }
3034 #endif
3035
3036 int ssl_init_wbio_buffer(SSL *s,int push)
3037         {
3038         BIO *bbio;
3039
3040         if (s->bbio == NULL)
3041                 {
3042                 bbio=BIO_new(BIO_f_buffer());
3043                 if (bbio == NULL) return(0);
3044                 s->bbio=bbio;
3045                 }
3046         else
3047                 {
3048                 bbio=s->bbio;
3049                 if (s->bbio == s->wbio)
3050                         s->wbio=BIO_pop(s->wbio);
3051                 }
3052         (void)BIO_reset(bbio);
3053 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3054         if (!BIO_set_read_buffer_size(bbio,1))
3055                 {
3056                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3057                 return(0);
3058                 }
3059         if (push)
3060                 {
3061                 if (s->wbio != bbio)
3062                         s->wbio=BIO_push(bbio,s->wbio);
3063                 }
3064         else
3065                 {
3066                 if (s->wbio == bbio)
3067                         s->wbio=BIO_pop(bbio);
3068                 }
3069         return(1);
3070         }
3071
3072 void ssl_free_wbio_buffer(SSL *s)
3073         {
3074         if (s->bbio == NULL) return;
3075
3076         if (s->bbio == s->wbio)
3077                 {
3078                 /* remove buffering */
3079                 s->wbio=BIO_pop(s->wbio);
3080 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3081                 assert(s->wbio != NULL);
3082 #endif
3083         }
3084         BIO_free(s->bbio);
3085         s->bbio=NULL;
3086         }
3087
3088 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3089         {
3090         ctx->quiet_shutdown=mode;
3091         }
3092
3093 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3094         {
3095         return(ctx->quiet_shutdown);
3096         }
3097
3098 void SSL_set_quiet_shutdown(SSL *s,int mode)
3099         {
3100         s->quiet_shutdown=mode;
3101         }
3102
3103 int SSL_get_quiet_shutdown(const SSL *s)
3104         {
3105         return(s->quiet_shutdown);
3106         }
3107
3108 void SSL_set_shutdown(SSL *s,int mode)
3109         {
3110         s->shutdown=mode;
3111         }
3112
3113 int SSL_get_shutdown(const SSL *s)
3114         {
3115         return(s->shutdown);
3116         }
3117
3118 int SSL_version(const SSL *s)
3119         {
3120         return(s->version);
3121         }
3122
3123 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3124         {
3125         return(ssl->ctx);
3126         }
3127
3128 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3129         {
3130         if (ssl->ctx == ctx)
3131                 return ssl->ctx;
3132 #ifndef OPENSSL_NO_TLSEXT
3133         if (ctx == NULL)
3134                 ctx = ssl->initial_ctx;
3135 #endif
3136         if (ssl->cert != NULL)
3137                 ssl_cert_free(ssl->cert);
3138         ssl->cert = ssl_cert_dup(ctx->cert);
3139         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3140         if (ssl->ctx != NULL)
3141                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3142         ssl->ctx = ctx;
3143         return(ssl->ctx);
3144         }
3145
3146 #ifndef OPENSSL_NO_STDIO
3147 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3148         {
3149         return(X509_STORE_set_default_paths(ctx->cert_store));
3150         }
3151
3152 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3153                 const char *CApath)
3154         {
3155         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3156         }
3157 #endif
3158
3159 void SSL_set_info_callback(SSL *ssl,
3160         void (*cb)(const SSL *ssl,int type,int val))
3161         {
3162         ssl->info_callback=cb;
3163         }
3164
3165 /* One compiler (Diab DCC) doesn't like argument names in returned
3166    function pointer.  */
3167 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3168         {
3169         return ssl->info_callback;
3170         }
3171
3172 int SSL_state(const SSL *ssl)
3173         {
3174         return(ssl->state);
3175         }
3176
3177 void SSL_set_state(SSL *ssl, int state)
3178         {
3179         ssl->state = state;
3180         }
3181
3182 void SSL_set_verify_result(SSL *ssl,long arg)
3183         {
3184         ssl->verify_result=arg;
3185         }
3186
3187 long SSL_get_verify_result(const SSL *ssl)
3188         {
3189         return(ssl->verify_result);
3190         }
3191
3192 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3193                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3194         {
3195         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3196                                 new_func, dup_func, free_func);
3197         }
3198
3199 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3200         {
3201         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3202         }
3203
3204 void *SSL_get_ex_data(const SSL *s,int idx)
3205         {
3206         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3207         }
3208
3209 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3210                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3211         {
3212         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3213                                 new_func, dup_func, free_func);
3214         }
3215
3216 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3217         {
3218         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3219         }
3220
3221 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3222         {
3223         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3224         }
3225
3226 int ssl_ok(SSL *s)
3227         {
3228         return(1);
3229         }
3230
3231 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3232         {
3233         return(ctx->cert_store);
3234         }
3235
3236 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3237         {
3238         if (ctx->cert_store != NULL)
3239                 X509_STORE_free(ctx->cert_store);
3240         ctx->cert_store=store;
3241         }
3242
3243 int SSL_want(const SSL *s)
3244         {
3245         return(s->rwstate);
3246         }
3247
3248 /*!
3249  * \brief Set the callback for generating temporary RSA keys.
3250  * \param ctx the SSL context.
3251  * \param cb the callback
3252  */
3253
3254 #ifndef OPENSSL_NO_RSA
3255 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3256                                                           int is_export,
3257                                                           int keylength))
3258     {
3259     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3260     }
3261
3262 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3263                                                   int is_export,
3264                                                   int keylength))
3265     {
3266     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3267     }
3268 #endif
3269
3270 #ifdef DOXYGEN
3271 /*!
3272  * \brief The RSA temporary key callback function.
3273  * \param ssl the SSL session.
3274  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3275  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3276  * of the required key in bits.
3277  * \return the temporary RSA key.
3278  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3279  */
3280
3281 RSA *cb(SSL *ssl,int is_export,int keylength)
3282     {}
3283 #endif
3284
3285 /*!
3286  * \brief Set the callback for generating temporary DH keys.
3287  * \param ctx the SSL context.
3288  * \param dh the callback
3289  */
3290
3291 #ifndef OPENSSL_NO_DH
3292 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3293                                                         int keylength))
3294         {
3295         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3296         }
3297
3298 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3299                                                 int keylength))
3300         {
3301         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3302         }
3303 #endif
3304
3305 #ifndef OPENSSL_NO_ECDH
3306 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3307                                                                 int keylength))
3308         {
3309         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3310         }
3311
3312 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3313                                                         int keylength))
3314         {
3315         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3316         }
3317 #endif
3318
3319 #ifndef OPENSSL_NO_PSK
3320 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3321         {
3322         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3323                 {
3324                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3325                 return 0;
3326                 }
3327         if (ctx->psk_identity_hint != NULL)
3328                 OPENSSL_free(ctx->psk_identity_hint);
3329         if (identity_hint != NULL)
3330                 {
3331                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3332                 if (ctx->psk_identity_hint == NULL)
3333                         return 0;
3334                 }
3335         else
3336                 ctx->psk_identity_hint = NULL;
3337         return 1;
3338         }
3339
3340 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3341         {
3342         if (s == NULL)
3343                 return 0;
3344
3345         if (s->session == NULL)
3346                 return 1; /* session not created yet, ignored */
3347
3348         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3349                 {
3350                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3351                 return 0;
3352                 }
3353         if (s->session->psk_identity_hint != NULL)
3354                 OPENSSL_free(s->session->psk_identity_hint);
3355         if (identity_hint != NULL)
3356                 {
3357                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3358                 if (s->session->psk_identity_hint == NULL)
3359                         return 0;
3360                 }
3361         else
3362                 s->session->psk_identity_hint = NULL;
3363         return 1;
3364         }
3365
3366 const char *SSL_get_psk_identity_hint(const SSL *s)
3367         {
3368         if (s == NULL || s->session == NULL)
3369                 return NULL;
3370         return(s->session->psk_identity_hint);
3371         }
3372
3373 const char *SSL_get_psk_identity(const SSL *s)
3374         {
3375         if (s == NULL || s->session == NULL)
3376                 return NULL;
3377         return(s->session->psk_identity);
3378         }
3379
3380 void SSL_set_psk_client_callback(SSL *s,
3381     unsigned int (*cb)(SSL *ssl, const char *hint,
3382                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3383                        unsigned int max_psk_len))
3384         {
3385         s->psk_client_callback = cb;
3386         }
3387
3388 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3389     unsigned int (*cb)(SSL *ssl, const char *hint,
3390                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3391                        unsigned int max_psk_len))
3392         {
3393         ctx->psk_client_callback = cb;
3394         }
3395
3396 void SSL_set_psk_server_callback(SSL *s,
3397     unsigned int (*cb)(SSL *ssl, const char *identity,
3398                        unsigned char *psk, unsigned int max_psk_len))
3399         {
3400         s->psk_server_callback = cb;
3401         }
3402
3403 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3404     unsigned int (*cb)(SSL *ssl, const char *identity,
3405                        unsigned char *psk, unsigned int max_psk_len))
3406         {
3407         ctx->psk_server_callback = cb;
3408         }
3409 #endif
3410
3411 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))
3412         {
3413         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3414         }
3415 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))
3416         {
3417         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3418         }
3419
3420 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3421  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3422  * any. If EVP_MD pointer is passed, initializes ctx with this md
3423  * Returns newly allocated ctx;
3424  */
3425
3426 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3427 {
3428         ssl_clear_hash_ctx(hash);
3429         *hash = EVP_MD_CTX_create();
3430         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3431         return *hash;
3432 }
3433 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3434 {
3435
3436         if (*hash) EVP_MD_CTX_destroy(*hash);
3437         *hash=NULL;
3438 }
3439
3440 void SSL_set_debug(SSL *s, int debug)
3441         {
3442         s->debug = debug;
3443         }
3444
3445 int SSL_cache_hit(SSL *s)
3446         {
3447         return s->hit;
3448         }
3449
3450 int SSL_is_server(SSL *s)
3451         {
3452         return s->server;
3453         }
3454
3455 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3456 #include "../crypto/bio/bss_file.c"
3457 #endif
3458
3459 IMPLEMENT_STACK_OF(SSL_CIPHER)
3460 IMPLEMENT_STACK_OF(SSL_COMP)
3461 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3462                                     ssl_cipher_id);