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                 case SSL_CTRL_SET_CURVES_LIST:
1190                         return tls1_set_curves_list(NULL, NULL, parg);
1191                 case SSL_CTRL_SET_SIGALGS_LIST:
1192                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1193                         return tls1_set_sigalgs_list(NULL, parg, 0);
1194                 default:
1195                         return 0;
1196                         }
1197                 }
1198
1199         switch (cmd)
1200                 {
1201         case SSL_CTRL_GET_READ_AHEAD:
1202                 return(ctx->read_ahead);
1203         case SSL_CTRL_SET_READ_AHEAD:
1204                 l=ctx->read_ahead;
1205                 ctx->read_ahead=larg;
1206                 return(l);
1207
1208         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1209                 ctx->msg_callback_arg = parg;
1210                 return 1;
1211
1212         case SSL_CTRL_GET_MAX_CERT_LIST:
1213                 return(ctx->max_cert_list);
1214         case SSL_CTRL_SET_MAX_CERT_LIST:
1215                 l=ctx->max_cert_list;
1216                 ctx->max_cert_list=larg;
1217                 return(l);
1218
1219         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1220                 l=ctx->session_cache_size;
1221                 ctx->session_cache_size=larg;
1222                 return(l);
1223         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1224                 return(ctx->session_cache_size);
1225         case SSL_CTRL_SET_SESS_CACHE_MODE:
1226                 l=ctx->session_cache_mode;
1227                 ctx->session_cache_mode=larg;
1228                 return(l);
1229         case SSL_CTRL_GET_SESS_CACHE_MODE:
1230                 return(ctx->session_cache_mode);
1231
1232         case SSL_CTRL_SESS_NUMBER:
1233                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1234         case SSL_CTRL_SESS_CONNECT:
1235                 return(ctx->stats.sess_connect);
1236         case SSL_CTRL_SESS_CONNECT_GOOD:
1237                 return(ctx->stats.sess_connect_good);
1238         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1239                 return(ctx->stats.sess_connect_renegotiate);
1240         case SSL_CTRL_SESS_ACCEPT:
1241                 return(ctx->stats.sess_accept);
1242         case SSL_CTRL_SESS_ACCEPT_GOOD:
1243                 return(ctx->stats.sess_accept_good);
1244         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1245                 return(ctx->stats.sess_accept_renegotiate);
1246         case SSL_CTRL_SESS_HIT:
1247                 return(ctx->stats.sess_hit);
1248         case SSL_CTRL_SESS_CB_HIT:
1249                 return(ctx->stats.sess_cb_hit);
1250         case SSL_CTRL_SESS_MISSES:
1251                 return(ctx->stats.sess_miss);
1252         case SSL_CTRL_SESS_TIMEOUTS:
1253                 return(ctx->stats.sess_timeout);
1254         case SSL_CTRL_SESS_CACHE_FULL:
1255                 return(ctx->stats.sess_cache_full);
1256         case SSL_CTRL_OPTIONS:
1257                 return(ctx->options|=larg);
1258         case SSL_CTRL_CLEAR_OPTIONS:
1259                 return(ctx->options&=~larg);
1260         case SSL_CTRL_MODE:
1261                 return(ctx->mode|=larg);
1262         case SSL_CTRL_CLEAR_MODE:
1263                 return(ctx->mode&=~larg);
1264         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1265                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1266                         return 0;
1267                 ctx->max_send_fragment = larg;
1268                 return 1;
1269         case SSL_CTRL_CERT_FLAGS:
1270                 return(ctx->cert->cert_flags|=larg);
1271         case SSL_CTRL_CLEAR_CERT_FLAGS:
1272                 return(ctx->cert->cert_flags &=~larg);
1273         default:
1274                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1275                 }
1276         }
1277
1278 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1279         {
1280         switch(cmd)
1281                 {
1282         case SSL_CTRL_SET_MSG_CALLBACK:
1283                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1284                 return 1;
1285
1286         default:
1287                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1288                 }
1289         }
1290
1291 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1292         {
1293         long l;
1294
1295         l=a->id-b->id;
1296         if (l == 0L)
1297                 return(0);
1298         else
1299                 return((l > 0)?1:-1);
1300         }
1301
1302 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1303                         const SSL_CIPHER * const *bp)
1304         {
1305         long l;
1306
1307         l=(*ap)->id-(*bp)->id;
1308         if (l == 0L)
1309                 return(0);
1310         else
1311                 return((l > 0)?1:-1);
1312         }
1313
1314 /** return a STACK of the ciphers available for the SSL and in order of
1315  * preference */
1316 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1317         {
1318         if (s != NULL)
1319                 {
1320                 if (s->cipher_list != NULL)
1321                         {
1322                         return(s->cipher_list);
1323                         }
1324                 else if ((s->ctx != NULL) &&
1325                         (s->ctx->cipher_list != NULL))
1326                         {
1327                         return(s->ctx->cipher_list);
1328                         }
1329                 }
1330         return(NULL);
1331         }
1332
1333 /** return a STACK of the ciphers available for the SSL and in order of
1334  * algorithm id */
1335 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1336         {
1337         if (s != NULL)
1338                 {
1339                 if (s->cipher_list_by_id != NULL)
1340                         {
1341                         return(s->cipher_list_by_id);
1342                         }
1343                 else if ((s->ctx != NULL) &&
1344                         (s->ctx->cipher_list_by_id != NULL))
1345                         {
1346                         return(s->ctx->cipher_list_by_id);
1347                         }
1348                 }
1349         return(NULL);
1350         }
1351
1352 /** The old interface to get the same thing as SSL_get_ciphers() */
1353 const char *SSL_get_cipher_list(const SSL *s,int n)
1354         {
1355         SSL_CIPHER *c;
1356         STACK_OF(SSL_CIPHER) *sk;
1357
1358         if (s == NULL) return(NULL);
1359         sk=SSL_get_ciphers(s);
1360         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1361                 return(NULL);
1362         c=sk_SSL_CIPHER_value(sk,n);
1363         if (c == NULL) return(NULL);
1364         return(c->name);
1365         }
1366
1367 /** specify the ciphers to be used by default by the SSL_CTX */
1368 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1369         {
1370         STACK_OF(SSL_CIPHER) *sk;
1371
1372         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1373                 &ctx->cipher_list_by_id,str, ctx->cert);
1374         /* ssl_create_cipher_list may return an empty stack if it
1375          * was unable to find a cipher matching the given rule string
1376          * (for example if the rule string specifies a cipher which
1377          * has been disabled). This is not an error as far as
1378          * ssl_create_cipher_list is concerned, and hence
1379          * ctx->cipher_list and ctx->cipher_list_by_id has been
1380          * updated. */
1381         if (sk == NULL)
1382                 return 0;
1383         else if (sk_SSL_CIPHER_num(sk) == 0)
1384                 {
1385                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1386                 return 0;
1387                 }
1388         return 1;
1389         }
1390
1391 /** specify the ciphers to be used by the SSL */
1392 int SSL_set_cipher_list(SSL *s,const char *str)
1393         {
1394         STACK_OF(SSL_CIPHER) *sk;
1395
1396         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1397                 &s->cipher_list_by_id,str, s->cert);
1398         /* see comment in SSL_CTX_set_cipher_list */
1399         if (sk == NULL)
1400                 return 0;
1401         else if (sk_SSL_CIPHER_num(sk) == 0)
1402                 {
1403                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1404                 return 0;
1405                 }
1406         return 1;
1407         }
1408
1409 /* works well for SSLv2, not so good for SSLv3 */
1410 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1411         {
1412         char *p;
1413         STACK_OF(SSL_CIPHER) *sk;
1414         SSL_CIPHER *c;
1415         int i;
1416
1417         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1418                 (len < 2))
1419                 return(NULL);
1420
1421         p=buf;
1422         sk=s->session->ciphers;
1423         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1424                 {
1425                 int n;
1426
1427                 c=sk_SSL_CIPHER_value(sk,i);
1428                 n=strlen(c->name);
1429                 if (n+1 > len)
1430                         {
1431                         if (p != buf)
1432                                 --p;
1433                         *p='\0';
1434                         return buf;
1435                         }
1436                 strcpy(p,c->name);
1437                 p+=n;
1438                 *(p++)=':';
1439                 len-=n+1;
1440                 }
1441         p[-1]='\0';
1442         return(buf);
1443         }
1444
1445 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1446                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1447         {
1448         int i,j=0;
1449         SSL_CIPHER *c;
1450         CERT *ct = s->cert;
1451         unsigned char *q;
1452         int no_scsv = s->renegotiate;
1453         /* Set disabled masks for this session */
1454         ssl_set_client_disabled(s);
1455
1456         if (sk == NULL) return(0);
1457         q=p;
1458
1459         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1460                 {
1461                 c=sk_SSL_CIPHER_value(sk,i);
1462                 /* Skip disabled ciphers */
1463                 if (c->algorithm_ssl & ct->mask_ssl ||
1464                         c->algorithm_mkey & ct->mask_k ||
1465                         c->algorithm_auth & ct->mask_a)
1466                         continue;
1467 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1468                 if (c->id == SSL3_CK_SCSV)
1469                         {
1470                         if (no_scsv)
1471                                 continue;
1472                         else
1473                                 no_scsv = 1;
1474                         }
1475 #endif
1476                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1477                 p+=j;
1478                 }
1479         /* If p == q, no ciphers and caller indicates an error. Otherwise
1480          * add SCSV if not renegotiating.
1481          */
1482         if (p != q && !no_scsv)
1483                 {
1484                 static SSL_CIPHER scsv =
1485                         {
1486                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1487                         };
1488                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1489                 p+=j;
1490 #ifdef OPENSSL_RI_DEBUG
1491                 fprintf(stderr, "SCSV sent by client\n");
1492 #endif
1493                 }
1494
1495         return(p-q);
1496         }
1497
1498 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1499                                                STACK_OF(SSL_CIPHER) **skp)
1500         {
1501         const SSL_CIPHER *c;
1502         STACK_OF(SSL_CIPHER) *sk;
1503         int i,n;
1504         if (s->s3)
1505                 s->s3->send_connection_binding = 0;
1506
1507         n=ssl_put_cipher_by_char(s,NULL,NULL);
1508         if ((num%n) != 0)
1509                 {
1510                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1511                 return(NULL);
1512                 }
1513         if ((skp == NULL) || (*skp == NULL))
1514                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1515         else
1516                 {
1517                 sk= *skp;
1518                 sk_SSL_CIPHER_zero(sk);
1519                 }
1520
1521         if (s->cert->ciphers_raw)
1522                 OPENSSL_free(s->cert->ciphers_raw);
1523         s->cert->ciphers_raw = BUF_memdup(p, num);
1524         if (s->cert->ciphers_raw == NULL)
1525                 {
1526                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1527                 goto err;
1528                 }
1529         s->cert->ciphers_rawlen = (size_t)num;
1530
1531         for (i=0; i<num; i+=n)
1532                 {
1533                 /* Check for SCSV */
1534                 if (s->s3 && (n != 3 || !p[0]) &&
1535                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1536                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1537                         {
1538                         /* SCSV fatal if renegotiating */
1539                         if (s->renegotiate)
1540                                 {
1541                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1542                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1543                                 goto err;
1544                                 }
1545                         s->s3->send_connection_binding = 1;
1546                         p += n;
1547 #ifdef OPENSSL_RI_DEBUG
1548                         fprintf(stderr, "SCSV received by server\n");
1549 #endif
1550                         continue;
1551                         }
1552
1553                 c=ssl_get_cipher_by_char(s,p);
1554                 p+=n;
1555                 if (c != NULL)
1556                         {
1557                         if (!sk_SSL_CIPHER_push(sk,c))
1558                                 {
1559                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1560                                 goto err;
1561                                 }
1562                         }
1563                 }
1564
1565         if (skp != NULL)
1566                 *skp=sk;
1567         return(sk);
1568 err:
1569         if ((skp == NULL) || (*skp == NULL))
1570                 sk_SSL_CIPHER_free(sk);
1571         return(NULL);
1572         }
1573
1574
1575 #ifndef OPENSSL_NO_TLSEXT
1576 /** return a servername extension value if provided in Client Hello, or NULL.
1577  * So far, only host_name types are defined (RFC 3546).
1578  */
1579
1580 const char *SSL_get_servername(const SSL *s, const int type)
1581         {
1582         if (type != TLSEXT_NAMETYPE_host_name)
1583                 return NULL;
1584
1585         return s->session && !s->tlsext_hostname ?
1586                 s->session->tlsext_hostname :
1587                 s->tlsext_hostname;
1588         }
1589
1590 int SSL_get_servername_type(const SSL *s)
1591         {
1592         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1593                 return TLSEXT_NAMETYPE_host_name;
1594         return -1;
1595         }
1596
1597 # ifndef OPENSSL_NO_NEXTPROTONEG
1598 /* SSL_select_next_proto implements the standard protocol selection. It is
1599  * expected that this function is called from the callback set by
1600  * SSL_CTX_set_next_proto_select_cb.
1601  *
1602  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1603  * strings. The length byte itself is not included in the length. A byte
1604  * string of length 0 is invalid. No byte string may be truncated.
1605  *
1606  * The current, but experimental algorithm for selecting the protocol is:
1607  *
1608  * 1) If the server doesn't support NPN then this is indicated to the
1609  * callback. In this case, the client application has to abort the connection
1610  * or have a default application level protocol.
1611  *
1612  * 2) If the server supports NPN, but advertises an empty list then the
1613  * client selects the first protcol in its list, but indicates via the
1614  * API that this fallback case was enacted.
1615  *
1616  * 3) Otherwise, the client finds the first protocol in the server's list
1617  * that it supports and selects this protocol. This is because it's
1618  * assumed that the server has better information about which protocol
1619  * a client should use.
1620  *
1621  * 4) If the client doesn't support any of the server's advertised
1622  * protocols, then this is treated the same as case 2.
1623  *
1624  * It returns either
1625  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1626  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1627  */
1628 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)
1629         {
1630         unsigned int i, j;
1631         const unsigned char *result;
1632         int status = OPENSSL_NPN_UNSUPPORTED;
1633
1634         /* For each protocol in server preference order, see if we support it. */
1635         for (i = 0; i < server_len; )
1636                 {
1637                 for (j = 0; j < client_len; )
1638                         {
1639                         if (server[i] == client[j] &&
1640                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1641                                 {
1642                                 /* We found a match */
1643                                 result = &server[i];
1644                                 status = OPENSSL_NPN_NEGOTIATED;
1645                                 goto found;
1646                                 }
1647                         j += client[j];
1648                         j++;
1649                         }
1650                 i += server[i];
1651                 i++;
1652                 }
1653
1654         /* There's no overlap between our protocols and the server's list. */
1655         result = client;
1656         status = OPENSSL_NPN_NO_OVERLAP;
1657
1658         found:
1659         *out = (unsigned char *) result + 1;
1660         *outlen = result[0];
1661         return status;
1662         }
1663
1664 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1665  * requested protocol for this connection and returns 0. If the client didn't
1666  * request any protocol, then *data is set to NULL.
1667  *
1668  * Note that the client can request any protocol it chooses. The value returned
1669  * from this function need not be a member of the list of supported protocols
1670  * provided by the callback.
1671  */
1672 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1673         {
1674         *data = s->next_proto_negotiated;
1675         if (!*data) {
1676                 *len = 0;
1677         } else {
1678                 *len = s->next_proto_negotiated_len;
1679         }
1680 }
1681
1682 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1683  * TLS server needs a list of supported protocols for Next Protocol
1684  * Negotiation. The returned list must be in wire format.  The list is returned
1685  * by setting |out| to point to it and |outlen| to its length. This memory will
1686  * not be modified, but one should assume that the SSL* keeps a reference to
1687  * it.
1688  *
1689  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1690  * such extension will be included in the ServerHello. */
1691 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)
1692         {
1693         ctx->next_protos_advertised_cb = cb;
1694         ctx->next_protos_advertised_cb_arg = arg;
1695         }
1696
1697 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1698  * client needs to select a protocol from the server's provided list. |out|
1699  * must be set to point to the selected protocol (which may be within |in|).
1700  * The length of the protocol name must be written into |outlen|. The server's
1701  * advertised protocols are provided in |in| and |inlen|. The callback can
1702  * assume that |in| is syntactically valid.
1703  *
1704  * The client must select a protocol. It is fatal to the connection if this
1705  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1706  */
1707 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)
1708         {
1709         ctx->next_proto_select_cb = cb;
1710         ctx->next_proto_select_cb_arg = arg;
1711         }
1712 # endif
1713
1714 int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
1715                                custom_cli_ext_first_cb_fn fn1,
1716                                custom_cli_ext_second_cb_fn fn2, void* arg)
1717         {
1718         size_t i;
1719         custom_cli_ext_record* record;
1720
1721         /* Check for duplicates */
1722         for (i=0; i < ctx->custom_cli_ext_records_count; i++)
1723                 if (ext_type == ctx->custom_cli_ext_records[i].ext_type)
1724                         return 0;
1725
1726         ctx->custom_cli_ext_records = OPENSSL_realloc(ctx->custom_cli_ext_records,
1727                                                       (ctx->custom_cli_ext_records_count + 1) *
1728                                                       sizeof(custom_cli_ext_record));
1729         if (!ctx->custom_cli_ext_records) {
1730                 ctx->custom_cli_ext_records_count = 0;
1731                 return 0;
1732         }
1733         ctx->custom_cli_ext_records_count++;
1734         record = &ctx->custom_cli_ext_records[ctx->custom_cli_ext_records_count - 1];
1735         record->ext_type = ext_type;
1736         record->fn1 = fn1;
1737         record->fn2 = fn2;
1738         record->arg = arg;
1739         return 1;
1740         }
1741
1742 int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
1743                                custom_srv_ext_first_cb_fn fn1,
1744                                custom_srv_ext_second_cb_fn fn2, void* arg)
1745         {
1746         size_t i;
1747         custom_srv_ext_record* record;
1748
1749         /* Check for duplicates */
1750         for (i=0; i < ctx->custom_srv_ext_records_count; i++)
1751                 if (ext_type == ctx->custom_srv_ext_records[i].ext_type)
1752                         return 0;
1753
1754         ctx->custom_srv_ext_records = OPENSSL_realloc(ctx->custom_srv_ext_records,
1755                                                       (ctx->custom_srv_ext_records_count + 1) *
1756                                                       sizeof(custom_srv_ext_record));
1757         if (!ctx->custom_srv_ext_records) {
1758                 ctx->custom_srv_ext_records_count = 0;
1759                 return 0;
1760         }
1761         ctx->custom_srv_ext_records_count++;
1762         record = &ctx->custom_srv_ext_records[ctx->custom_srv_ext_records_count - 1];
1763         record->ext_type = ext_type;
1764         record->fn1 = fn1;
1765         record->fn2 = fn2;
1766         record->arg = arg;
1767         return 1;
1768         }
1769
1770 #endif
1771
1772 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1773         const char *label, size_t llen, const unsigned char *p, size_t plen,
1774         int use_context)
1775         {
1776         if (s->version < TLS1_VERSION)
1777                 return -1;
1778
1779         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1780                                                            llen, p, plen,
1781                                                            use_context);
1782         }
1783
1784 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1785         {
1786         unsigned long l;
1787
1788         l=(unsigned long)
1789                 ((unsigned int) a->session_id[0]     )|
1790                 ((unsigned int) a->session_id[1]<< 8L)|
1791                 ((unsigned long)a->session_id[2]<<16L)|
1792                 ((unsigned long)a->session_id[3]<<24L);
1793         return(l);
1794         }
1795
1796 /* NB: If this function (or indeed the hash function which uses a sort of
1797  * coarser function than this one) is changed, ensure
1798  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1799  * able to construct an SSL_SESSION that will collide with any existing session
1800  * with a matching session ID. */
1801 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1802         {
1803         if (a->ssl_version != b->ssl_version)
1804                 return(1);
1805         if (a->session_id_length != b->session_id_length)
1806                 return(1);
1807         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1808         }
1809
1810 /* These wrapper functions should remain rather than redeclaring
1811  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1812  * variable. The reason is that the functions aren't static, they're exposed via
1813  * ssl.h. */
1814 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1815 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1816
1817 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1818         {
1819         SSL_CTX *ret=NULL;
1820
1821         if (meth == NULL)
1822                 {
1823                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1824                 return(NULL);
1825                 }
1826
1827 #ifdef OPENSSL_FIPS
1828         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1829                 {
1830                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1831                 return NULL;
1832                 }
1833 #endif
1834
1835         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1836                 {
1837                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1838                 goto err;
1839                 }
1840         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1841         if (ret == NULL)
1842                 goto err;
1843
1844         memset(ret,0,sizeof(SSL_CTX));
1845
1846         ret->method=meth;
1847
1848         ret->cert_store=NULL;
1849         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1850         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1851         ret->session_cache_head=NULL;
1852         ret->session_cache_tail=NULL;
1853
1854         /* We take the system default */
1855         ret->session_timeout=meth->get_timeout();
1856
1857         ret->new_session_cb=0;
1858         ret->remove_session_cb=0;
1859         ret->get_session_cb=0;
1860         ret->generate_session_id=0;
1861
1862         memset((char *)&ret->stats,0,sizeof(ret->stats));
1863
1864         ret->references=1;
1865         ret->quiet_shutdown=0;
1866
1867 /*      ret->cipher=NULL;*/
1868 /*      ret->s2->challenge=NULL;
1869         ret->master_key=NULL;
1870         ret->key_arg=NULL;
1871         ret->s2->conn_id=NULL; */
1872
1873         ret->info_callback=NULL;
1874
1875         ret->app_verify_callback=0;
1876         ret->app_verify_arg=NULL;
1877
1878         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1879         ret->read_ahead=0;
1880         ret->msg_callback=0;
1881         ret->msg_callback_arg=NULL;
1882         ret->verify_mode=SSL_VERIFY_NONE;
1883 #if 0
1884         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1885 #endif
1886         ret->sid_ctx_length=0;
1887         ret->default_verify_callback=NULL;
1888         if ((ret->cert=ssl_cert_new()) == NULL)
1889                 goto err;
1890
1891         ret->default_passwd_callback=0;
1892         ret->default_passwd_callback_userdata=NULL;
1893         ret->client_cert_cb=0;
1894         ret->app_gen_cookie_cb=0;
1895         ret->app_verify_cookie_cb=0;
1896
1897         ret->sessions=lh_SSL_SESSION_new();
1898         if (ret->sessions == NULL) goto err;
1899         ret->cert_store=X509_STORE_new();
1900         if (ret->cert_store == NULL) goto err;
1901
1902         ssl_create_cipher_list(ret->method,
1903                 &ret->cipher_list,&ret->cipher_list_by_id,
1904                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1905         if (ret->cipher_list == NULL
1906             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1907                 {
1908                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1909                 goto err2;
1910                 }
1911
1912         ret->param = X509_VERIFY_PARAM_new();
1913         if (!ret->param)
1914                 goto err;
1915
1916         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1917                 {
1918                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1919                 goto err2;
1920                 }
1921         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1922                 {
1923                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1924                 goto err2;
1925                 }
1926         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1927                 {
1928                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1929                 goto err2;
1930                 }
1931
1932         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1933                 goto err;
1934
1935         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1936
1937         ret->extra_certs=NULL;
1938         /* No compression for DTLS */
1939         if (meth->version != DTLS1_VERSION)
1940                 ret->comp_methods=SSL_COMP_get_compression_methods();
1941
1942         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1943
1944 #ifndef OPENSSL_NO_TLSEXT
1945         ret->tlsext_servername_callback = 0;
1946         ret->tlsext_servername_arg = NULL;
1947         /* Setup RFC4507 ticket keys */
1948         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1949                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1950                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1951                 ret->options |= SSL_OP_NO_TICKET;
1952
1953         ret->tlsext_status_cb = 0;
1954         ret->tlsext_status_arg = NULL;
1955
1956 # ifndef OPENSSL_NO_NEXTPROTONEG
1957         ret->next_protos_advertised_cb = 0;
1958         ret->next_proto_select_cb = 0;
1959 # endif
1960 #endif
1961 #ifndef OPENSSL_NO_PSK
1962         ret->psk_identity_hint=NULL;
1963         ret->psk_client_callback=NULL;
1964         ret->psk_server_callback=NULL;
1965 #endif
1966 #ifndef OPENSSL_NO_SRP
1967         SSL_CTX_SRP_CTX_init(ret);
1968 #endif
1969         ret->custom_cli_ext_records = NULL;
1970         ret->custom_cli_ext_records_count = 0;
1971         ret->custom_srv_ext_records = NULL;
1972         ret->custom_srv_ext_records_count = 0;
1973 #ifndef OPENSSL_NO_BUF_FREELISTS
1974         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1975         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1976         if (!ret->rbuf_freelist)
1977                 goto err;
1978         ret->rbuf_freelist->chunklen = 0;
1979         ret->rbuf_freelist->len = 0;
1980         ret->rbuf_freelist->head = NULL;
1981         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1982         if (!ret->wbuf_freelist)
1983                 {
1984                 OPENSSL_free(ret->rbuf_freelist);
1985                 goto err;
1986                 }
1987         ret->wbuf_freelist->chunklen = 0;
1988         ret->wbuf_freelist->len = 0;
1989         ret->wbuf_freelist->head = NULL;
1990 #endif
1991 #ifndef OPENSSL_NO_ENGINE
1992         ret->client_cert_engine = NULL;
1993 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1994 #define eng_strx(x)     #x
1995 #define eng_str(x)      eng_strx(x)
1996         /* Use specific client engine automatically... ignore errors */
1997         {
1998         ENGINE *eng;
1999         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2000         if (!eng)
2001                 {
2002                 ERR_clear_error();
2003                 ENGINE_load_builtin_engines();
2004                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2005                 }
2006         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2007                 ERR_clear_error();
2008         }
2009 #endif
2010 #endif
2011         /* Default is to connect to non-RI servers. When RI is more widely
2012          * deployed might change this.
2013          */
2014         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2015
2016         return(ret);
2017 err:
2018         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2019 err2:
2020         if (ret != NULL) SSL_CTX_free(ret);
2021         return(NULL);
2022         }
2023
2024 #if 0
2025 static void SSL_COMP_free(SSL_COMP *comp)
2026     { OPENSSL_free(comp); }
2027 #endif
2028
2029 #ifndef OPENSSL_NO_BUF_FREELISTS
2030 static void
2031 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2032         {
2033         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2034         for (ent = list->head; ent; ent = next)
2035                 {
2036                 next = ent->next;
2037                 OPENSSL_free(ent);
2038                 }
2039         OPENSSL_free(list);
2040         }
2041 #endif
2042
2043 void SSL_CTX_free(SSL_CTX *a)
2044         {
2045         int i;
2046
2047         if (a == NULL) return;
2048
2049         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2050 #ifdef REF_PRINT
2051         REF_PRINT("SSL_CTX",a);
2052 #endif
2053         if (i > 0) return;
2054 #ifdef REF_CHECK
2055         if (i < 0)
2056                 {
2057                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2058                 abort(); /* ok */
2059                 }
2060 #endif
2061
2062         if (a->param)
2063                 X509_VERIFY_PARAM_free(a->param);
2064
2065         /*
2066          * Free internal session cache. However: the remove_cb() may reference
2067          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2068          * after the sessions were flushed.
2069          * As the ex_data handling routines might also touch the session cache,
2070          * the most secure solution seems to be: empty (flush) the cache, then
2071          * free ex_data, then finally free the cache.
2072          * (See ticket [openssl.org #212].)
2073          */
2074         if (a->sessions != NULL)
2075                 SSL_CTX_flush_sessions(a,0);
2076
2077         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2078
2079         if (a->sessions != NULL)
2080                 lh_SSL_SESSION_free(a->sessions);
2081
2082         if (a->cert_store != NULL)
2083                 X509_STORE_free(a->cert_store);
2084         if (a->cipher_list != NULL)
2085                 sk_SSL_CIPHER_free(a->cipher_list);
2086         if (a->cipher_list_by_id != NULL)
2087                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2088         if (a->cert != NULL)
2089                 ssl_cert_free(a->cert);
2090         if (a->client_CA != NULL)
2091                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2092         if (a->extra_certs != NULL)
2093                 sk_X509_pop_free(a->extra_certs,X509_free);
2094 #if 0 /* This should never be done, since it removes a global database */
2095         if (a->comp_methods != NULL)
2096                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2097 #else
2098         a->comp_methods = NULL;
2099 #endif
2100
2101         if (a->srtp_profiles)
2102                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2103
2104 #ifndef OPENSSL_NO_PSK
2105         if (a->psk_identity_hint)
2106                 OPENSSL_free(a->psk_identity_hint);
2107 #endif
2108 #ifndef OPENSSL_NO_SRP
2109         SSL_CTX_SRP_CTX_free(a);
2110 #endif
2111 #ifndef OPENSSL_NO_TLSEXT
2112         OPENSSL_free(a->custom_cli_ext_records);
2113         OPENSSL_free(a->custom_srv_ext_records);
2114 #endif
2115 #ifndef OPENSSL_NO_ENGINE
2116         if (a->client_cert_engine)
2117                 ENGINE_finish(a->client_cert_engine);
2118 #endif
2119
2120 #ifndef OPENSSL_NO_BUF_FREELISTS
2121         if (a->wbuf_freelist)
2122                 ssl_buf_freelist_free(a->wbuf_freelist);
2123         if (a->rbuf_freelist)
2124                 ssl_buf_freelist_free(a->rbuf_freelist);
2125 #endif
2126 #ifndef OPENSSL_NO_TLSEXT
2127 # ifndef OPENSSL_NO_EC
2128         if (a->tlsext_ecpointformatlist)
2129                 OPENSSL_free(a->tlsext_ecpointformatlist);
2130         if (a->tlsext_ellipticcurvelist)
2131                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2132 # endif /* OPENSSL_NO_EC */
2133 #endif
2134
2135         OPENSSL_free(a);
2136         }
2137
2138 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2139         {
2140         ctx->default_passwd_callback=cb;
2141         }
2142
2143 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2144         {
2145         ctx->default_passwd_callback_userdata=u;
2146         }
2147
2148 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2149         {
2150         ctx->app_verify_callback=cb;
2151         ctx->app_verify_arg=arg;
2152         }
2153
2154 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2155         {
2156         ctx->verify_mode=mode;
2157         ctx->default_verify_callback=cb;
2158         }
2159
2160 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2161         {
2162         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2163         }
2164
2165 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2166         {
2167         ssl_cert_set_cert_cb(c->cert, cb, arg);
2168         }
2169
2170 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2171         {
2172         ssl_cert_set_cert_cb(s->cert, cb, arg);
2173         }
2174
2175 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2176         {
2177         CERT_PKEY *cpk;
2178         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2179         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2180         int rsa_tmp_export,dh_tmp_export,kl;
2181         unsigned long mask_k,mask_a,emask_k,emask_a;
2182         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2183 #ifndef OPENSSL_NO_ECDH
2184         int have_ecdh_tmp;
2185 #endif
2186         X509 *x = NULL;
2187         EVP_PKEY *ecc_pkey = NULL;
2188         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2189
2190         if (c == NULL) return;
2191
2192         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2193
2194 #ifndef OPENSSL_NO_RSA
2195         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2196         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2197                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2198 #else
2199         rsa_tmp=rsa_tmp_export=0;
2200 #endif
2201 #ifndef OPENSSL_NO_DH
2202         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2203         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2204                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2205 #else
2206         dh_tmp=dh_tmp_export=0;
2207 #endif
2208
2209 #ifndef OPENSSL_NO_ECDH
2210         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2211 #endif
2212         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2213         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2214         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2215         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2216         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2217         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2218         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2219         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2220         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2221         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2222         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2223 /* FIX THIS EAY EAY EAY */
2224         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2225         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2226         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2227         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2228         mask_k=0;
2229         mask_a=0;
2230         emask_k=0;
2231         emask_a=0;
2232
2233
2234
2235 #ifdef CIPHER_DEBUG
2236         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2237                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2238                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2239 #endif
2240
2241         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2242         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2243                 mask_k |= SSL_kGOST;
2244                 mask_a |= SSL_aGOST01;
2245         }
2246         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2247         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2248                 mask_k |= SSL_kGOST;
2249                 mask_a |= SSL_aGOST94;
2250         }
2251
2252         if (rsa_enc || (rsa_tmp && rsa_sign))
2253                 mask_k|=SSL_kRSA;
2254         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2255                 emask_k|=SSL_kRSA;
2256
2257 #if 0
2258         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2259         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2260                 (rsa_enc || rsa_sign || dsa_sign))
2261                 mask_k|=SSL_kEDH;
2262         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2263                 (rsa_enc || rsa_sign || dsa_sign))
2264                 emask_k|=SSL_kEDH;
2265 #endif
2266
2267         if (dh_tmp_export)
2268                 emask_k|=SSL_kEDH;
2269
2270         if (dh_tmp)
2271                 mask_k|=SSL_kEDH;
2272
2273         if (dh_rsa) mask_k|=SSL_kDHr;
2274         if (dh_rsa_export) emask_k|=SSL_kDHr;
2275
2276         if (dh_dsa) mask_k|=SSL_kDHd;
2277         if (dh_dsa_export) emask_k|=SSL_kDHd;
2278
2279         if (emask_k & (SSL_kDHr|SSL_kDHd))
2280                 mask_a |= SSL_aDH;
2281
2282         if (rsa_enc || rsa_sign)
2283                 {
2284                 mask_a|=SSL_aRSA;
2285                 emask_a|=SSL_aRSA;
2286                 }
2287
2288         if (dsa_sign)
2289                 {
2290                 mask_a|=SSL_aDSS;
2291                 emask_a|=SSL_aDSS;
2292                 }
2293
2294         mask_a|=SSL_aNULL;
2295         emask_a|=SSL_aNULL;
2296
2297 #ifndef OPENSSL_NO_KRB5
2298         mask_k|=SSL_kKRB5;
2299         mask_a|=SSL_aKRB5;
2300         emask_k|=SSL_kKRB5;
2301         emask_a|=SSL_aKRB5;
2302 #endif
2303
2304         /* An ECC certificate may be usable for ECDH and/or
2305          * ECDSA cipher suites depending on the key usage extension.
2306          */
2307         if (have_ecc_cert)
2308                 {
2309                 cpk = &c->pkeys[SSL_PKEY_ECC];
2310                 x = cpk->x509;
2311                 /* This call populates extension flags (ex_flags) */
2312                 X509_check_purpose(x, -1, 0);
2313                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2314                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2315                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2316                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2317                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2318                         ecdsa_ok = 0;
2319                 ecc_pkey = X509_get_pubkey(x);
2320                 ecc_pkey_size = (ecc_pkey != NULL) ?
2321                     EVP_PKEY_bits(ecc_pkey) : 0;
2322                 EVP_PKEY_free(ecc_pkey);
2323                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2324                         {
2325                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2326                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2327                         }
2328 #ifndef OPENSSL_NO_ECDH
2329                 if (ecdh_ok)
2330                         {
2331
2332                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2333                                 {
2334                                 mask_k|=SSL_kECDHr;
2335                                 mask_a|=SSL_aECDH;
2336                                 if (ecc_pkey_size <= 163)
2337                                         {
2338                                         emask_k|=SSL_kECDHr;
2339                                         emask_a|=SSL_aECDH;
2340                                         }
2341                                 }
2342
2343                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2344                                 {
2345                                 mask_k|=SSL_kECDHe;
2346                                 mask_a|=SSL_aECDH;
2347                                 if (ecc_pkey_size <= 163)
2348                                         {
2349                                         emask_k|=SSL_kECDHe;
2350                                         emask_a|=SSL_aECDH;
2351                                         }
2352                                 }
2353                         }
2354 #endif
2355 #ifndef OPENSSL_NO_ECDSA
2356                 if (ecdsa_ok)
2357                         {
2358                         mask_a|=SSL_aECDSA;
2359                         emask_a|=SSL_aECDSA;
2360                         }
2361 #endif
2362                 }
2363
2364 #ifndef OPENSSL_NO_ECDH
2365         if (have_ecdh_tmp)
2366                 {
2367                 mask_k|=SSL_kEECDH;
2368                 emask_k|=SSL_kEECDH;
2369                 }
2370 #endif
2371
2372 #ifndef OPENSSL_NO_PSK
2373         mask_k |= SSL_kPSK;
2374         mask_a |= SSL_aPSK;
2375         emask_k |= SSL_kPSK;
2376         emask_a |= SSL_aPSK;
2377 #endif
2378
2379         c->mask_k=mask_k;
2380         c->mask_a=mask_a;
2381         c->export_mask_k=emask_k;
2382         c->export_mask_a=emask_a;
2383         c->valid=1;
2384         }
2385
2386 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2387 #define ku_reject(x, usage) \
2388         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2389
2390 #ifndef OPENSSL_NO_EC
2391
2392 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2393         {
2394         unsigned long alg_k, alg_a;
2395         EVP_PKEY *pkey = NULL;
2396         int keysize = 0;
2397         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2398         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2399
2400         alg_k = cs->algorithm_mkey;
2401         alg_a = cs->algorithm_auth;
2402
2403         if (SSL_C_IS_EXPORT(cs))
2404                 {
2405                 /* ECDH key length in export ciphers must be <= 163 bits */
2406                 pkey = X509_get_pubkey(x);
2407                 if (pkey == NULL) return 0;
2408                 keysize = EVP_PKEY_bits(pkey);
2409                 EVP_PKEY_free(pkey);
2410                 if (keysize > 163) return 0;
2411                 }
2412
2413         /* This call populates the ex_flags field correctly */
2414         X509_check_purpose(x, -1, 0);
2415         if ((x->sig_alg) && (x->sig_alg->algorithm))
2416                 {
2417                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2418                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2419                 }
2420         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2421                 {
2422                 /* key usage, if present, must allow key agreement */
2423                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2424                         {
2425                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2426                         return 0;
2427                         }
2428                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2429                         {
2430                         /* signature alg must be ECDSA */
2431                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2432                                 {
2433                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2434                                 return 0;
2435                                 }
2436                         }
2437                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2438                         {
2439                         /* signature alg must be RSA */
2440
2441                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2442                                 {
2443                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2444                                 return 0;
2445                                 }
2446                         }
2447                 }
2448         if (alg_a & SSL_aECDSA)
2449                 {
2450                 /* key usage, if present, must allow signing */
2451                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2452                         {
2453                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2454                         return 0;
2455                         }
2456                 }
2457
2458         return 1;  /* all checks are ok */
2459         }
2460
2461 #endif
2462
2463 static int ssl_get_server_cert_index(const SSL *s)
2464         {
2465         int idx;
2466         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2467         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2468                 idx = SSL_PKEY_RSA_SIGN;
2469         if (idx == -1)
2470                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2471         return idx;
2472         }
2473
2474 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2475         {
2476         CERT *c;
2477         int i;
2478
2479         c = s->cert;
2480         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2481
2482 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2483         /* Broken protocol test: return last used certificate: which may
2484          * mismatch the one expected.
2485          */
2486         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2487                 return c->key;
2488 #endif
2489
2490         i = ssl_get_server_cert_index(s);
2491
2492         /* This may or may not be an error. */
2493         if (i < 0)
2494                 return NULL;
2495
2496         /* May be NULL. */
2497         return &c->pkeys[i];
2498         }
2499
2500 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2501         {
2502         unsigned long alg_a;
2503         CERT *c;
2504         int idx = -1;
2505
2506         alg_a = cipher->algorithm_auth;
2507         c=s->cert;
2508
2509 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2510         /* Broken protocol test: use last key: which may
2511          * mismatch the one expected.
2512          */
2513         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2514                 idx = c->key - c->pkeys;
2515         else
2516 #endif
2517
2518         if ((alg_a & SSL_aDSS) &&
2519                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2520                 idx = SSL_PKEY_DSA_SIGN;
2521         else if (alg_a & SSL_aRSA)
2522                 {
2523                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2524                         idx = SSL_PKEY_RSA_SIGN;
2525                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2526                         idx = SSL_PKEY_RSA_ENC;
2527                 }
2528         else if ((alg_a & SSL_aECDSA) &&
2529                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2530                 idx = SSL_PKEY_ECC;
2531         if (idx == -1)
2532                 {
2533                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2534                 return(NULL);
2535                 }
2536         if (pmd)
2537                 *pmd = c->pkeys[idx].digest;
2538         return c->pkeys[idx].privatekey;
2539         }
2540
2541 #ifndef OPENSSL_NO_TLSEXT
2542 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2543         {
2544         CERT *c;
2545         int i;
2546
2547         c = s->cert;
2548         i = ssl_get_server_cert_index(s);
2549
2550         if (i == -1)
2551                 return NULL;
2552
2553         *authz_length = 0;
2554         if (c->pkeys[i].authz == NULL)
2555                 return(NULL);
2556         *authz_length = c->pkeys[i].authz_length;
2557
2558         return c->pkeys[i].authz;
2559         }
2560
2561 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2562                                    size_t *serverinfo_length)
2563         {
2564         CERT *c = NULL;
2565         int i = 0;
2566         *serverinfo_length = 0;
2567
2568         c = s->cert;
2569         i = ssl_get_server_cert_index(s);
2570
2571         if (i == -1)
2572                 return 0;
2573         if (c->pkeys[i].serverinfo == NULL)
2574                 return 0;
2575
2576         *serverinfo = c->pkeys[i].serverinfo;
2577         *serverinfo_length = c->pkeys[i].serverinfo_length;
2578         return 1;
2579         }
2580 #endif
2581
2582 void ssl_update_cache(SSL *s,int mode)
2583         {
2584         int i;
2585
2586         /* If the session_id_length is 0, we are not supposed to cache it,
2587          * and it would be rather hard to do anyway :-) */
2588         if (s->session->session_id_length == 0) return;
2589
2590         i=s->session_ctx->session_cache_mode;
2591         if ((i & mode) && (!s->hit)
2592                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2593                     || SSL_CTX_add_session(s->session_ctx,s->session))
2594                 && (s->session_ctx->new_session_cb != NULL))
2595                 {
2596                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2597                 if (!s->session_ctx->new_session_cb(s,s->session))
2598                         SSL_SESSION_free(s->session);
2599                 }
2600
2601         /* auto flush every 255 connections */
2602         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2603                 ((i & mode) == mode))
2604                 {
2605                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2606                         ?s->session_ctx->stats.sess_connect_good
2607                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2608                         {
2609                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2610                         }
2611                 }
2612         }
2613
2614 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2615         {
2616         return(s->method);
2617         }
2618
2619 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2620         {
2621         int conn= -1;
2622         int ret=1;
2623
2624         if (s->method != meth)
2625                 {
2626                 if (s->handshake_func != NULL)
2627                         conn=(s->handshake_func == s->method->ssl_connect);
2628
2629                 if (s->method->version == meth->version)
2630                         s->method=meth;
2631                 else
2632                         {
2633                         s->method->ssl_free(s);
2634                         s->method=meth;
2635                         ret=s->method->ssl_new(s);
2636                         }
2637
2638                 if (conn == 1)
2639                         s->handshake_func=meth->ssl_connect;
2640                 else if (conn == 0)
2641                         s->handshake_func=meth->ssl_accept;
2642                 }
2643         return(ret);
2644         }
2645
2646 int SSL_get_error(const SSL *s,int i)
2647         {
2648         int reason;
2649         unsigned long l;
2650         BIO *bio;
2651
2652         if (i > 0) return(SSL_ERROR_NONE);
2653
2654         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2655          * etc, where we do encode the error */
2656         if ((l=ERR_peek_error()) != 0)
2657                 {
2658                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2659                         return(SSL_ERROR_SYSCALL);
2660                 else
2661                         return(SSL_ERROR_SSL);
2662                 }
2663
2664         if ((i < 0) && SSL_want_read(s))
2665                 {
2666                 bio=SSL_get_rbio(s);
2667                 if (BIO_should_read(bio))
2668                         return(SSL_ERROR_WANT_READ);
2669                 else if (BIO_should_write(bio))
2670                         /* This one doesn't make too much sense ... We never try
2671                          * to write to the rbio, and an application program where
2672                          * rbio and wbio are separate couldn't even know what it
2673                          * should wait for.
2674                          * However if we ever set s->rwstate incorrectly
2675                          * (so that we have SSL_want_read(s) instead of
2676                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2677                          * this test works around that bug; so it might be safer
2678                          * to keep it. */
2679                         return(SSL_ERROR_WANT_WRITE);
2680                 else if (BIO_should_io_special(bio))
2681                         {
2682                         reason=BIO_get_retry_reason(bio);
2683                         if (reason == BIO_RR_CONNECT)
2684                                 return(SSL_ERROR_WANT_CONNECT);
2685                         else if (reason == BIO_RR_ACCEPT)
2686                                 return(SSL_ERROR_WANT_ACCEPT);
2687                         else
2688                                 return(SSL_ERROR_SYSCALL); /* unknown */
2689                         }
2690                 }
2691
2692         if ((i < 0) && SSL_want_write(s))
2693                 {
2694                 bio=SSL_get_wbio(s);
2695                 if (BIO_should_write(bio))
2696                         return(SSL_ERROR_WANT_WRITE);
2697                 else if (BIO_should_read(bio))
2698                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2699                         return(SSL_ERROR_WANT_READ);
2700                 else if (BIO_should_io_special(bio))
2701                         {
2702                         reason=BIO_get_retry_reason(bio);
2703                         if (reason == BIO_RR_CONNECT)
2704                                 return(SSL_ERROR_WANT_CONNECT);
2705                         else if (reason == BIO_RR_ACCEPT)
2706                                 return(SSL_ERROR_WANT_ACCEPT);
2707                         else
2708                                 return(SSL_ERROR_SYSCALL);
2709                         }
2710                 }
2711         if ((i < 0) && SSL_want_x509_lookup(s))
2712                 {
2713                 return(SSL_ERROR_WANT_X509_LOOKUP);
2714                 }
2715
2716         if (i == 0)
2717                 {
2718                 if (s->version == SSL2_VERSION)
2719                         {
2720                         /* assume it is the socket being closed */
2721                         return(SSL_ERROR_ZERO_RETURN);
2722                         }
2723                 else
2724                         {
2725                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2726                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2727                                 return(SSL_ERROR_ZERO_RETURN);
2728                         }
2729                 }
2730         return(SSL_ERROR_SYSCALL);
2731         }
2732
2733 int SSL_do_handshake(SSL *s)
2734         {
2735         int ret=1;
2736
2737         if (s->handshake_func == NULL)
2738                 {
2739                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2740                 return(-1);
2741                 }
2742
2743         s->method->ssl_renegotiate_check(s);
2744
2745         if (SSL_in_init(s) || SSL_in_before(s))
2746                 {
2747                 ret=s->handshake_func(s);
2748                 }
2749         return(ret);
2750         }
2751
2752 /* For the next 2 functions, SSL_clear() sets shutdown and so
2753  * one of these calls will reset it */
2754 void SSL_set_accept_state(SSL *s)
2755         {
2756         s->server=1;
2757         s->shutdown=0;
2758         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2759         s->handshake_func=s->method->ssl_accept;
2760         /* clear the current cipher */
2761         ssl_clear_cipher_ctx(s);
2762         ssl_clear_hash_ctx(&s->read_hash);
2763         ssl_clear_hash_ctx(&s->write_hash);
2764         }
2765
2766 void SSL_set_connect_state(SSL *s)
2767         {
2768         s->server=0;
2769         s->shutdown=0;
2770         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2771         s->handshake_func=s->method->ssl_connect;
2772         /* clear the current cipher */
2773         ssl_clear_cipher_ctx(s);
2774         ssl_clear_hash_ctx(&s->read_hash);
2775         ssl_clear_hash_ctx(&s->write_hash);
2776         }
2777
2778 int ssl_undefined_function(SSL *s)
2779         {
2780         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2781         return(0);
2782         }
2783
2784 int ssl_undefined_void_function(void)
2785         {
2786         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2787         return(0);
2788         }
2789
2790 int ssl_undefined_const_function(const SSL *s)
2791         {
2792         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2793         return(0);
2794         }
2795
2796 SSL_METHOD *ssl_bad_method(int ver)
2797         {
2798         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2799         return(NULL);
2800         }
2801
2802 const char *SSL_get_version(const SSL *s)
2803         {
2804         if (s->version == TLS1_2_VERSION)
2805                 return("TLSv1.2");
2806         else if (s->version == TLS1_1_VERSION)
2807                 return("TLSv1.1");
2808         else if (s->version == TLS1_VERSION)
2809                 return("TLSv1");
2810         else if (s->version == SSL3_VERSION)
2811                 return("SSLv3");
2812         else if (s->version == SSL2_VERSION)
2813                 return("SSLv2");
2814         else
2815                 return("unknown");
2816         }
2817
2818 SSL *SSL_dup(SSL *s)
2819         {
2820         STACK_OF(X509_NAME) *sk;
2821         X509_NAME *xn;
2822         SSL *ret;
2823         int i;
2824
2825         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2826             return(NULL);
2827
2828         ret->version = s->version;
2829         ret->type = s->type;
2830         ret->method = s->method;
2831
2832         if (s->session != NULL)
2833                 {
2834                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2835                 SSL_copy_session_id(ret,s);
2836                 }
2837         else
2838                 {
2839                 /* No session has been established yet, so we have to expect
2840                  * that s->cert or ret->cert will be changed later --
2841                  * they should not both point to the same object,
2842                  * and thus we can't use SSL_copy_session_id. */
2843
2844                 ret->method->ssl_free(ret);
2845                 ret->method = s->method;
2846                 ret->method->ssl_new(ret);
2847
2848                 if (s->cert != NULL)
2849                         {
2850                         if (ret->cert != NULL)
2851                                 {
2852                                 ssl_cert_free(ret->cert);
2853                                 }
2854                         ret->cert = ssl_cert_dup(s->cert);
2855                         if (ret->cert == NULL)
2856                                 goto err;
2857                         }
2858
2859                 SSL_set_session_id_context(ret,
2860                         s->sid_ctx, s->sid_ctx_length);
2861                 }
2862
2863         ret->options=s->options;
2864         ret->mode=s->mode;
2865         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2866         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2867         ret->msg_callback = s->msg_callback;
2868         ret->msg_callback_arg = s->msg_callback_arg;
2869         SSL_set_verify(ret,SSL_get_verify_mode(s),
2870                 SSL_get_verify_callback(s));
2871         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2872         ret->generate_session_id = s->generate_session_id;
2873
2874         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2875
2876         ret->debug=s->debug;
2877
2878         /* copy app data, a little dangerous perhaps */
2879         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2880                 goto err;
2881
2882         /* setup rbio, and wbio */
2883         if (s->rbio != NULL)
2884                 {
2885                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2886                         goto err;
2887                 }
2888         if (s->wbio != NULL)
2889                 {
2890                 if (s->wbio != s->rbio)
2891                         {
2892                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2893                                 goto err;
2894                         }
2895                 else
2896                         ret->wbio=ret->rbio;
2897                 }
2898         ret->rwstate = s->rwstate;
2899         ret->in_handshake = s->in_handshake;
2900         ret->handshake_func = s->handshake_func;
2901         ret->server = s->server;
2902         ret->renegotiate = s->renegotiate;
2903         ret->new_session = s->new_session;
2904         ret->quiet_shutdown = s->quiet_shutdown;
2905         ret->shutdown=s->shutdown;
2906         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2907         ret->rstate=s->rstate;
2908         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2909         ret->hit=s->hit;
2910
2911         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2912
2913         /* dup the cipher_list and cipher_list_by_id stacks */
2914         if (s->cipher_list != NULL)
2915                 {
2916                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2917                         goto err;
2918                 }
2919         if (s->cipher_list_by_id != NULL)
2920                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2921                         == NULL)
2922                         goto err;
2923
2924         /* Dup the client_CA list */
2925         if (s->client_CA != NULL)
2926                 {
2927                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2928                 ret->client_CA=sk;
2929                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2930                         {
2931                         xn=sk_X509_NAME_value(sk,i);
2932                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2933                                 {
2934                                 X509_NAME_free(xn);
2935                                 goto err;
2936                                 }
2937                         }
2938                 }
2939
2940         if (0)
2941                 {
2942 err:
2943                 if (ret != NULL) SSL_free(ret);
2944                 ret=NULL;
2945                 }
2946         return(ret);
2947         }
2948
2949 void ssl_clear_cipher_ctx(SSL *s)
2950         {
2951         if (s->enc_read_ctx != NULL)
2952                 {
2953                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2954                 OPENSSL_free(s->enc_read_ctx);
2955                 s->enc_read_ctx=NULL;
2956                 }
2957         if (s->enc_write_ctx != NULL)
2958                 {
2959                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2960                 OPENSSL_free(s->enc_write_ctx);
2961                 s->enc_write_ctx=NULL;
2962                 }
2963 #ifndef OPENSSL_NO_COMP
2964         if (s->expand != NULL)
2965                 {
2966                 COMP_CTX_free(s->expand);
2967                 s->expand=NULL;
2968                 }
2969         if (s->compress != NULL)
2970                 {
2971                 COMP_CTX_free(s->compress);
2972                 s->compress=NULL;
2973                 }
2974 #endif
2975         }
2976
2977 /* Fix this function so that it takes an optional type parameter */
2978 X509 *SSL_get_certificate(const SSL *s)
2979         {
2980         if (s->cert != NULL)
2981                 return(s->cert->key->x509);
2982         else
2983                 return(NULL);
2984         }
2985
2986 /* Fix this function so that it takes an optional type parameter */
2987 EVP_PKEY *SSL_get_privatekey(SSL *s)
2988         {
2989         if (s->cert != NULL)
2990                 return(s->cert->key->privatekey);
2991         else
2992                 return(NULL);
2993         }
2994
2995 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2996         {
2997         if ((s->session != NULL) && (s->session->cipher != NULL))
2998                 return(s->session->cipher);
2999         return(NULL);
3000         }
3001 #ifdef OPENSSL_NO_COMP
3002 const void *SSL_get_current_compression(SSL *s)
3003         {
3004         return NULL;
3005         }
3006 const void *SSL_get_current_expansion(SSL *s)
3007         {
3008         return NULL;
3009         }
3010 #else
3011
3012 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3013         {
3014         if (s->compress != NULL)
3015                 return(s->compress->meth);
3016         return(NULL);
3017         }
3018
3019 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3020         {
3021         if (s->expand != NULL)
3022                 return(s->expand->meth);
3023         return(NULL);
3024         }
3025 #endif
3026
3027 int ssl_init_wbio_buffer(SSL *s,int push)
3028         {
3029         BIO *bbio;
3030
3031         if (s->bbio == NULL)
3032                 {
3033                 bbio=BIO_new(BIO_f_buffer());
3034                 if (bbio == NULL) return(0);
3035                 s->bbio=bbio;
3036                 }
3037         else
3038                 {
3039                 bbio=s->bbio;
3040                 if (s->bbio == s->wbio)
3041                         s->wbio=BIO_pop(s->wbio);
3042                 }
3043         (void)BIO_reset(bbio);
3044 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3045         if (!BIO_set_read_buffer_size(bbio,1))
3046                 {
3047                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3048                 return(0);
3049                 }
3050         if (push)
3051                 {
3052                 if (s->wbio != bbio)
3053                         s->wbio=BIO_push(bbio,s->wbio);
3054                 }
3055         else
3056                 {
3057                 if (s->wbio == bbio)
3058                         s->wbio=BIO_pop(bbio);
3059                 }
3060         return(1);
3061         }
3062
3063 void ssl_free_wbio_buffer(SSL *s)
3064         {
3065         if (s->bbio == NULL) return;
3066
3067         if (s->bbio == s->wbio)
3068                 {
3069                 /* remove buffering */
3070                 s->wbio=BIO_pop(s->wbio);
3071 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3072                 assert(s->wbio != NULL);
3073 #endif
3074         }
3075         BIO_free(s->bbio);
3076         s->bbio=NULL;
3077         }
3078
3079 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3080         {
3081         ctx->quiet_shutdown=mode;
3082         }
3083
3084 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3085         {
3086         return(ctx->quiet_shutdown);
3087         }
3088
3089 void SSL_set_quiet_shutdown(SSL *s,int mode)
3090         {
3091         s->quiet_shutdown=mode;
3092         }
3093
3094 int SSL_get_quiet_shutdown(const SSL *s)
3095         {
3096         return(s->quiet_shutdown);
3097         }
3098
3099 void SSL_set_shutdown(SSL *s,int mode)
3100         {
3101         s->shutdown=mode;
3102         }
3103
3104 int SSL_get_shutdown(const SSL *s)
3105         {
3106         return(s->shutdown);
3107         }
3108
3109 int SSL_version(const SSL *s)
3110         {
3111         return(s->version);
3112         }
3113
3114 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3115         {
3116         return(ssl->ctx);
3117         }
3118
3119 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3120         {
3121         if (ssl->ctx == ctx)
3122                 return ssl->ctx;
3123 #ifndef OPENSSL_NO_TLSEXT
3124         if (ctx == NULL)
3125                 ctx = ssl->initial_ctx;
3126 #endif
3127         if (ssl->cert != NULL)
3128                 ssl_cert_free(ssl->cert);
3129         ssl->cert = ssl_cert_dup(ctx->cert);
3130         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3131         if (ssl->ctx != NULL)
3132                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3133         ssl->ctx = ctx;
3134         return(ssl->ctx);
3135         }
3136
3137 #ifndef OPENSSL_NO_STDIO
3138 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3139         {
3140         return(X509_STORE_set_default_paths(ctx->cert_store));
3141         }
3142
3143 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3144                 const char *CApath)
3145         {
3146         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3147         }
3148 #endif
3149
3150 void SSL_set_info_callback(SSL *ssl,
3151         void (*cb)(const SSL *ssl,int type,int val))
3152         {
3153         ssl->info_callback=cb;
3154         }
3155
3156 /* One compiler (Diab DCC) doesn't like argument names in returned
3157    function pointer.  */
3158 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3159         {
3160         return ssl->info_callback;
3161         }
3162
3163 int SSL_state(const SSL *ssl)
3164         {
3165         return(ssl->state);
3166         }
3167
3168 void SSL_set_state(SSL *ssl, int state)
3169         {
3170         ssl->state = state;
3171         }
3172
3173 void SSL_set_verify_result(SSL *ssl,long arg)
3174         {
3175         ssl->verify_result=arg;
3176         }
3177
3178 long SSL_get_verify_result(const SSL *ssl)
3179         {
3180         return(ssl->verify_result);
3181         }
3182
3183 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3184                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3185         {
3186         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3187                                 new_func, dup_func, free_func);
3188         }
3189
3190 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3191         {
3192         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3193         }
3194
3195 void *SSL_get_ex_data(const SSL *s,int idx)
3196         {
3197         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3198         }
3199
3200 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3201                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3202         {
3203         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3204                                 new_func, dup_func, free_func);
3205         }
3206
3207 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3208         {
3209         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3210         }
3211
3212 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3213         {
3214         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3215         }
3216
3217 int ssl_ok(SSL *s)
3218         {
3219         return(1);
3220         }
3221
3222 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3223         {
3224         return(ctx->cert_store);
3225         }
3226
3227 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3228         {
3229         if (ctx->cert_store != NULL)
3230                 X509_STORE_free(ctx->cert_store);
3231         ctx->cert_store=store;
3232         }
3233
3234 int SSL_want(const SSL *s)
3235         {
3236         return(s->rwstate);
3237         }
3238
3239 /*!
3240  * \brief Set the callback for generating temporary RSA keys.
3241  * \param ctx the SSL context.
3242  * \param cb the callback
3243  */
3244
3245 #ifndef OPENSSL_NO_RSA
3246 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3247                                                           int is_export,
3248                                                           int keylength))
3249     {
3250     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3251     }
3252
3253 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3254                                                   int is_export,
3255                                                   int keylength))
3256     {
3257     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3258     }
3259 #endif
3260
3261 #ifdef DOXYGEN
3262 /*!
3263  * \brief The RSA temporary key callback function.
3264  * \param ssl the SSL session.
3265  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3266  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3267  * of the required key in bits.
3268  * \return the temporary RSA key.
3269  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3270  */
3271
3272 RSA *cb(SSL *ssl,int is_export,int keylength)
3273     {}
3274 #endif
3275
3276 /*!
3277  * \brief Set the callback for generating temporary DH keys.
3278  * \param ctx the SSL context.
3279  * \param dh the callback
3280  */
3281
3282 #ifndef OPENSSL_NO_DH
3283 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3284                                                         int keylength))
3285         {
3286         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3287         }
3288
3289 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3290                                                 int keylength))
3291         {
3292         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3293         }
3294 #endif
3295
3296 #ifndef OPENSSL_NO_ECDH
3297 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3298                                                                 int keylength))
3299         {
3300         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3301         }
3302
3303 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3304                                                         int keylength))
3305         {
3306         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3307         }
3308 #endif
3309
3310 #ifndef OPENSSL_NO_PSK
3311 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3312         {
3313         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3314                 {
3315                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3316                 return 0;
3317                 }
3318         if (ctx->psk_identity_hint != NULL)
3319                 OPENSSL_free(ctx->psk_identity_hint);
3320         if (identity_hint != NULL)
3321                 {
3322                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3323                 if (ctx->psk_identity_hint == NULL)
3324                         return 0;
3325                 }
3326         else
3327                 ctx->psk_identity_hint = NULL;
3328         return 1;
3329         }
3330
3331 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3332         {
3333         if (s == NULL)
3334                 return 0;
3335
3336         if (s->session == NULL)
3337                 return 1; /* session not created yet, ignored */
3338
3339         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3340                 {
3341                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3342                 return 0;
3343                 }
3344         if (s->session->psk_identity_hint != NULL)
3345                 OPENSSL_free(s->session->psk_identity_hint);
3346         if (identity_hint != NULL)
3347                 {
3348                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3349                 if (s->session->psk_identity_hint == NULL)
3350                         return 0;
3351                 }
3352         else
3353                 s->session->psk_identity_hint = NULL;
3354         return 1;
3355         }
3356
3357 const char *SSL_get_psk_identity_hint(const SSL *s)
3358         {
3359         if (s == NULL || s->session == NULL)
3360                 return NULL;
3361         return(s->session->psk_identity_hint);
3362         }
3363
3364 const char *SSL_get_psk_identity(const SSL *s)
3365         {
3366         if (s == NULL || s->session == NULL)
3367                 return NULL;
3368         return(s->session->psk_identity);
3369         }
3370
3371 void SSL_set_psk_client_callback(SSL *s,
3372     unsigned int (*cb)(SSL *ssl, const char *hint,
3373                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3374                        unsigned int max_psk_len))
3375         {
3376         s->psk_client_callback = cb;
3377         }
3378
3379 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3380     unsigned int (*cb)(SSL *ssl, const char *hint,
3381                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3382                        unsigned int max_psk_len))
3383         {
3384         ctx->psk_client_callback = cb;
3385         }
3386
3387 void SSL_set_psk_server_callback(SSL *s,
3388     unsigned int (*cb)(SSL *ssl, const char *identity,
3389                        unsigned char *psk, unsigned int max_psk_len))
3390         {
3391         s->psk_server_callback = cb;
3392         }
3393
3394 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3395     unsigned int (*cb)(SSL *ssl, const char *identity,
3396                        unsigned char *psk, unsigned int max_psk_len))
3397         {
3398         ctx->psk_server_callback = cb;
3399         }
3400 #endif
3401
3402 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))
3403         {
3404         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3405         }
3406 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))
3407         {
3408         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3409         }
3410
3411 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3412  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3413  * any. If EVP_MD pointer is passed, initializes ctx with this md
3414  * Returns newly allocated ctx;
3415  */
3416
3417 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3418 {
3419         ssl_clear_hash_ctx(hash);
3420         *hash = EVP_MD_CTX_create();
3421         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3422         return *hash;
3423 }
3424 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3425 {
3426
3427         if (*hash) EVP_MD_CTX_destroy(*hash);
3428         *hash=NULL;
3429 }
3430
3431 void SSL_set_debug(SSL *s, int debug)
3432         {
3433         s->debug = debug;
3434         }
3435
3436 int SSL_cache_hit(SSL *s)
3437         {
3438         return s->hit;
3439         }
3440
3441 int SSL_is_server(SSL *s)
3442         {
3443         return s->server;
3444         }
3445
3446 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3447 #include "../crypto/bio/bss_file.c"
3448 #endif
3449
3450 IMPLEMENT_STACK_OF(SSL_CIPHER)
3451 IMPLEMENT_STACK_OF(SSL_COMP)
3452 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3453                                     ssl_cipher_id);