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 #endif
1714
1715 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1716         const char *label, size_t llen, const unsigned char *p, size_t plen,
1717         int use_context)
1718         {
1719         if (s->version < TLS1_VERSION)
1720                 return -1;
1721
1722         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1723                                                            llen, p, plen,
1724                                                            use_context);
1725         }
1726
1727 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1728         {
1729         unsigned long l;
1730
1731         l=(unsigned long)
1732                 ((unsigned int) a->session_id[0]     )|
1733                 ((unsigned int) a->session_id[1]<< 8L)|
1734                 ((unsigned long)a->session_id[2]<<16L)|
1735                 ((unsigned long)a->session_id[3]<<24L);
1736         return(l);
1737         }
1738
1739 /* NB: If this function (or indeed the hash function which uses a sort of
1740  * coarser function than this one) is changed, ensure
1741  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1742  * able to construct an SSL_SESSION that will collide with any existing session
1743  * with a matching session ID. */
1744 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1745         {
1746         if (a->ssl_version != b->ssl_version)
1747                 return(1);
1748         if (a->session_id_length != b->session_id_length)
1749                 return(1);
1750         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1751         }
1752
1753 /* These wrapper functions should remain rather than redeclaring
1754  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1755  * variable. The reason is that the functions aren't static, they're exposed via
1756  * ssl.h. */
1757 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1758 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1759
1760 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1761         {
1762         SSL_CTX *ret=NULL;
1763
1764         if (meth == NULL)
1765                 {
1766                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1767                 return(NULL);
1768                 }
1769
1770 #ifdef OPENSSL_FIPS
1771         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1772                 {
1773                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1774                 return NULL;
1775                 }
1776 #endif
1777
1778         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1779                 {
1780                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1781                 goto err;
1782                 }
1783         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1784         if (ret == NULL)
1785                 goto err;
1786
1787         memset(ret,0,sizeof(SSL_CTX));
1788
1789         ret->method=meth;
1790
1791         ret->cert_store=NULL;
1792         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1793         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1794         ret->session_cache_head=NULL;
1795         ret->session_cache_tail=NULL;
1796
1797         /* We take the system default */
1798         ret->session_timeout=meth->get_timeout();
1799
1800         ret->new_session_cb=0;
1801         ret->remove_session_cb=0;
1802         ret->get_session_cb=0;
1803         ret->generate_session_id=0;
1804
1805         memset((char *)&ret->stats,0,sizeof(ret->stats));
1806
1807         ret->references=1;
1808         ret->quiet_shutdown=0;
1809
1810 /*      ret->cipher=NULL;*/
1811 /*      ret->s2->challenge=NULL;
1812         ret->master_key=NULL;
1813         ret->key_arg=NULL;
1814         ret->s2->conn_id=NULL; */
1815
1816         ret->info_callback=NULL;
1817
1818         ret->app_verify_callback=0;
1819         ret->app_verify_arg=NULL;
1820
1821         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1822         ret->read_ahead=0;
1823         ret->msg_callback=0;
1824         ret->msg_callback_arg=NULL;
1825         ret->verify_mode=SSL_VERIFY_NONE;
1826 #if 0
1827         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1828 #endif
1829         ret->sid_ctx_length=0;
1830         ret->default_verify_callback=NULL;
1831         if ((ret->cert=ssl_cert_new()) == NULL)
1832                 goto err;
1833
1834         ret->default_passwd_callback=0;
1835         ret->default_passwd_callback_userdata=NULL;
1836         ret->client_cert_cb=0;
1837         ret->app_gen_cookie_cb=0;
1838         ret->app_verify_cookie_cb=0;
1839
1840         ret->sessions=lh_SSL_SESSION_new();
1841         if (ret->sessions == NULL) goto err;
1842         ret->cert_store=X509_STORE_new();
1843         if (ret->cert_store == NULL) goto err;
1844
1845         ssl_create_cipher_list(ret->method,
1846                 &ret->cipher_list,&ret->cipher_list_by_id,
1847                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1848         if (ret->cipher_list == NULL
1849             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1850                 {
1851                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1852                 goto err2;
1853                 }
1854
1855         ret->param = X509_VERIFY_PARAM_new();
1856         if (!ret->param)
1857                 goto err;
1858
1859         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1860                 {
1861                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1862                 goto err2;
1863                 }
1864         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1865                 {
1866                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1867                 goto err2;
1868                 }
1869         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1870                 {
1871                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1872                 goto err2;
1873                 }
1874
1875         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1876                 goto err;
1877
1878         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1879
1880         ret->extra_certs=NULL;
1881         /* No compression for DTLS */
1882         if (meth->version != DTLS1_VERSION)
1883                 ret->comp_methods=SSL_COMP_get_compression_methods();
1884
1885         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1886
1887 #ifndef OPENSSL_NO_TLSEXT
1888         ret->tlsext_servername_callback = 0;
1889         ret->tlsext_servername_arg = NULL;
1890         /* Setup RFC4507 ticket keys */
1891         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1892                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1893                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1894                 ret->options |= SSL_OP_NO_TICKET;
1895
1896         ret->tlsext_status_cb = 0;
1897         ret->tlsext_status_arg = NULL;
1898
1899 # ifndef OPENSSL_NO_NEXTPROTONEG
1900         ret->next_protos_advertised_cb = 0;
1901         ret->next_proto_select_cb = 0;
1902 # endif
1903 #endif
1904 #ifndef OPENSSL_NO_PSK
1905         ret->psk_identity_hint=NULL;
1906         ret->psk_client_callback=NULL;
1907         ret->psk_server_callback=NULL;
1908 #endif
1909 #ifndef OPENSSL_NO_SRP
1910         SSL_CTX_SRP_CTX_init(ret);
1911 #endif
1912 #ifndef OPENSSL_NO_BUF_FREELISTS
1913         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1914         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1915         if (!ret->rbuf_freelist)
1916                 goto err;
1917         ret->rbuf_freelist->chunklen = 0;
1918         ret->rbuf_freelist->len = 0;
1919         ret->rbuf_freelist->head = NULL;
1920         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1921         if (!ret->wbuf_freelist)
1922                 {
1923                 OPENSSL_free(ret->rbuf_freelist);
1924                 goto err;
1925                 }
1926         ret->wbuf_freelist->chunklen = 0;
1927         ret->wbuf_freelist->len = 0;
1928         ret->wbuf_freelist->head = NULL;
1929 #endif
1930 #ifndef OPENSSL_NO_ENGINE
1931         ret->client_cert_engine = NULL;
1932 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1933 #define eng_strx(x)     #x
1934 #define eng_str(x)      eng_strx(x)
1935         /* Use specific client engine automatically... ignore errors */
1936         {
1937         ENGINE *eng;
1938         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1939         if (!eng)
1940                 {
1941                 ERR_clear_error();
1942                 ENGINE_load_builtin_engines();
1943                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1944                 }
1945         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1946                 ERR_clear_error();
1947         }
1948 #endif
1949 #endif
1950         /* Default is to connect to non-RI servers. When RI is more widely
1951          * deployed might change this.
1952          */
1953         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1954
1955         return(ret);
1956 err:
1957         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1958 err2:
1959         if (ret != NULL) SSL_CTX_free(ret);
1960         return(NULL);
1961         }
1962
1963 #if 0
1964 static void SSL_COMP_free(SSL_COMP *comp)
1965     { OPENSSL_free(comp); }
1966 #endif
1967
1968 #ifndef OPENSSL_NO_BUF_FREELISTS
1969 static void
1970 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1971         {
1972         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1973         for (ent = list->head; ent; ent = next)
1974                 {
1975                 next = ent->next;
1976                 OPENSSL_free(ent);
1977                 }
1978         OPENSSL_free(list);
1979         }
1980 #endif
1981
1982 void SSL_CTX_free(SSL_CTX *a)
1983         {
1984         int i;
1985
1986         if (a == NULL) return;
1987
1988         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1989 #ifdef REF_PRINT
1990         REF_PRINT("SSL_CTX",a);
1991 #endif
1992         if (i > 0) return;
1993 #ifdef REF_CHECK
1994         if (i < 0)
1995                 {
1996                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1997                 abort(); /* ok */
1998                 }
1999 #endif
2000
2001         if (a->param)
2002                 X509_VERIFY_PARAM_free(a->param);
2003
2004         /*
2005          * Free internal session cache. However: the remove_cb() may reference
2006          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2007          * after the sessions were flushed.
2008          * As the ex_data handling routines might also touch the session cache,
2009          * the most secure solution seems to be: empty (flush) the cache, then
2010          * free ex_data, then finally free the cache.
2011          * (See ticket [openssl.org #212].)
2012          */
2013         if (a->sessions != NULL)
2014                 SSL_CTX_flush_sessions(a,0);
2015
2016         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2017
2018         if (a->sessions != NULL)
2019                 lh_SSL_SESSION_free(a->sessions);
2020
2021         if (a->cert_store != NULL)
2022                 X509_STORE_free(a->cert_store);
2023         if (a->cipher_list != NULL)
2024                 sk_SSL_CIPHER_free(a->cipher_list);
2025         if (a->cipher_list_by_id != NULL)
2026                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2027         if (a->cert != NULL)
2028                 ssl_cert_free(a->cert);
2029         if (a->client_CA != NULL)
2030                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2031         if (a->extra_certs != NULL)
2032                 sk_X509_pop_free(a->extra_certs,X509_free);
2033 #if 0 /* This should never be done, since it removes a global database */
2034         if (a->comp_methods != NULL)
2035                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2036 #else
2037         a->comp_methods = NULL;
2038 #endif
2039
2040         if (a->srtp_profiles)
2041                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2042
2043 #ifndef OPENSSL_NO_PSK
2044         if (a->psk_identity_hint)
2045                 OPENSSL_free(a->psk_identity_hint);
2046 #endif
2047 #ifndef OPENSSL_NO_SRP
2048         SSL_CTX_SRP_CTX_free(a);
2049 #endif
2050 #ifndef OPENSSL_NO_ENGINE
2051         if (a->client_cert_engine)
2052                 ENGINE_finish(a->client_cert_engine);
2053 #endif
2054
2055 #ifndef OPENSSL_NO_BUF_FREELISTS
2056         if (a->wbuf_freelist)
2057                 ssl_buf_freelist_free(a->wbuf_freelist);
2058         if (a->rbuf_freelist)
2059                 ssl_buf_freelist_free(a->rbuf_freelist);
2060 #endif
2061 #ifndef OPENSSL_NO_TLSEXT
2062 # ifndef OPENSSL_NO_EC
2063         if (a->tlsext_ecpointformatlist)
2064                 OPENSSL_free(a->tlsext_ecpointformatlist);
2065         if (a->tlsext_ellipticcurvelist)
2066                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2067 # endif /* OPENSSL_NO_EC */
2068 #endif
2069
2070         OPENSSL_free(a);
2071         }
2072
2073 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2074         {
2075         ctx->default_passwd_callback=cb;
2076         }
2077
2078 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2079         {
2080         ctx->default_passwd_callback_userdata=u;
2081         }
2082
2083 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2084         {
2085         ctx->app_verify_callback=cb;
2086         ctx->app_verify_arg=arg;
2087         }
2088
2089 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2090         {
2091         ctx->verify_mode=mode;
2092         ctx->default_verify_callback=cb;
2093         }
2094
2095 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2096         {
2097         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2098         }
2099
2100 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2101         {
2102         ssl_cert_set_cert_cb(c->cert, cb, arg);
2103         }
2104
2105 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2106         {
2107         ssl_cert_set_cert_cb(s->cert, cb, arg);
2108         }
2109
2110 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2111         {
2112         CERT_PKEY *cpk;
2113         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2114         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2115         int rsa_tmp_export,dh_tmp_export,kl;
2116         unsigned long mask_k,mask_a,emask_k,emask_a;
2117         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2118 #ifndef OPENSSL_NO_ECDH
2119         int have_ecdh_tmp;
2120 #endif
2121         X509 *x = NULL;
2122         EVP_PKEY *ecc_pkey = NULL;
2123         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2124
2125         if (c == NULL) return;
2126
2127         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2128
2129 #ifndef OPENSSL_NO_RSA
2130         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2131         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2132                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2133 #else
2134         rsa_tmp=rsa_tmp_export=0;
2135 #endif
2136 #ifndef OPENSSL_NO_DH
2137         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2138         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2139                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2140 #else
2141         dh_tmp=dh_tmp_export=0;
2142 #endif
2143
2144 #ifndef OPENSSL_NO_ECDH
2145         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2146 #endif
2147         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2148         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2149         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2150         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2151         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2152         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2153         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2154         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2155         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2156         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2157         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2158 /* FIX THIS EAY EAY EAY */
2159         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2160         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2161         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2162         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2163         mask_k=0;
2164         mask_a=0;
2165         emask_k=0;
2166         emask_a=0;
2167
2168
2169
2170 #ifdef CIPHER_DEBUG
2171         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2172                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2173                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2174 #endif
2175
2176         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2177         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2178                 mask_k |= SSL_kGOST;
2179                 mask_a |= SSL_aGOST01;
2180         }
2181         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2182         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2183                 mask_k |= SSL_kGOST;
2184                 mask_a |= SSL_aGOST94;
2185         }
2186
2187         if (rsa_enc || (rsa_tmp && rsa_sign))
2188                 mask_k|=SSL_kRSA;
2189         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2190                 emask_k|=SSL_kRSA;
2191
2192 #if 0
2193         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2194         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2195                 (rsa_enc || rsa_sign || dsa_sign))
2196                 mask_k|=SSL_kEDH;
2197         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2198                 (rsa_enc || rsa_sign || dsa_sign))
2199                 emask_k|=SSL_kEDH;
2200 #endif
2201
2202         if (dh_tmp_export)
2203                 emask_k|=SSL_kEDH;
2204
2205         if (dh_tmp)
2206                 mask_k|=SSL_kEDH;
2207
2208         if (dh_rsa) mask_k|=SSL_kDHr;
2209         if (dh_rsa_export) emask_k|=SSL_kDHr;
2210
2211         if (dh_dsa) mask_k|=SSL_kDHd;
2212         if (dh_dsa_export) emask_k|=SSL_kDHd;
2213
2214         if (emask_k & (SSL_kDHr|SSL_kDHd))
2215                 mask_a |= SSL_aDH;
2216
2217         if (rsa_enc || rsa_sign)
2218                 {
2219                 mask_a|=SSL_aRSA;
2220                 emask_a|=SSL_aRSA;
2221                 }
2222
2223         if (dsa_sign)
2224                 {
2225                 mask_a|=SSL_aDSS;
2226                 emask_a|=SSL_aDSS;
2227                 }
2228
2229         mask_a|=SSL_aNULL;
2230         emask_a|=SSL_aNULL;
2231
2232 #ifndef OPENSSL_NO_KRB5
2233         mask_k|=SSL_kKRB5;
2234         mask_a|=SSL_aKRB5;
2235         emask_k|=SSL_kKRB5;
2236         emask_a|=SSL_aKRB5;
2237 #endif
2238
2239         /* An ECC certificate may be usable for ECDH and/or
2240          * ECDSA cipher suites depending on the key usage extension.
2241          */
2242         if (have_ecc_cert)
2243                 {
2244                 cpk = &c->pkeys[SSL_PKEY_ECC];
2245                 x = cpk->x509;
2246                 /* This call populates extension flags (ex_flags) */
2247                 X509_check_purpose(x, -1, 0);
2248                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2249                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2250                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2251                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2252                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2253                         ecdsa_ok = 0;
2254                 ecc_pkey = X509_get_pubkey(x);
2255                 ecc_pkey_size = (ecc_pkey != NULL) ?
2256                     EVP_PKEY_bits(ecc_pkey) : 0;
2257                 EVP_PKEY_free(ecc_pkey);
2258                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2259                         {
2260                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2261                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2262                         }
2263 #ifndef OPENSSL_NO_ECDH
2264                 if (ecdh_ok)
2265                         {
2266
2267                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2268                                 {
2269                                 mask_k|=SSL_kECDHr;
2270                                 mask_a|=SSL_aECDH;
2271                                 if (ecc_pkey_size <= 163)
2272                                         {
2273                                         emask_k|=SSL_kECDHr;
2274                                         emask_a|=SSL_aECDH;
2275                                         }
2276                                 }
2277
2278                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2279                                 {
2280                                 mask_k|=SSL_kECDHe;
2281                                 mask_a|=SSL_aECDH;
2282                                 if (ecc_pkey_size <= 163)
2283                                         {
2284                                         emask_k|=SSL_kECDHe;
2285                                         emask_a|=SSL_aECDH;
2286                                         }
2287                                 }
2288                         }
2289 #endif
2290 #ifndef OPENSSL_NO_ECDSA
2291                 if (ecdsa_ok)
2292                         {
2293                         mask_a|=SSL_aECDSA;
2294                         emask_a|=SSL_aECDSA;
2295                         }
2296 #endif
2297                 }
2298
2299 #ifndef OPENSSL_NO_ECDH
2300         if (have_ecdh_tmp)
2301                 {
2302                 mask_k|=SSL_kEECDH;
2303                 emask_k|=SSL_kEECDH;
2304                 }
2305 #endif
2306
2307 #ifndef OPENSSL_NO_PSK
2308         mask_k |= SSL_kPSK;
2309         mask_a |= SSL_aPSK;
2310         emask_k |= SSL_kPSK;
2311         emask_a |= SSL_aPSK;
2312 #endif
2313
2314         c->mask_k=mask_k;
2315         c->mask_a=mask_a;
2316         c->export_mask_k=emask_k;
2317         c->export_mask_a=emask_a;
2318         c->valid=1;
2319         }
2320
2321 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2322 #define ku_reject(x, usage) \
2323         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2324
2325 #ifndef OPENSSL_NO_EC
2326
2327 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2328         {
2329         unsigned long alg_k, alg_a;
2330         EVP_PKEY *pkey = NULL;
2331         int keysize = 0;
2332         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2333         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2334
2335         alg_k = cs->algorithm_mkey;
2336         alg_a = cs->algorithm_auth;
2337
2338         if (SSL_C_IS_EXPORT(cs))
2339                 {
2340                 /* ECDH key length in export ciphers must be <= 163 bits */
2341                 pkey = X509_get_pubkey(x);
2342                 if (pkey == NULL) return 0;
2343                 keysize = EVP_PKEY_bits(pkey);
2344                 EVP_PKEY_free(pkey);
2345                 if (keysize > 163) return 0;
2346                 }
2347
2348         /* This call populates the ex_flags field correctly */
2349         X509_check_purpose(x, -1, 0);
2350         if ((x->sig_alg) && (x->sig_alg->algorithm))
2351                 {
2352                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2353                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2354                 }
2355         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2356                 {
2357                 /* key usage, if present, must allow key agreement */
2358                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2359                         {
2360                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2361                         return 0;
2362                         }
2363                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2364                         {
2365                         /* signature alg must be ECDSA */
2366                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2367                                 {
2368                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2369                                 return 0;
2370                                 }
2371                         }
2372                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2373                         {
2374                         /* signature alg must be RSA */
2375
2376                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2377                                 {
2378                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2379                                 return 0;
2380                                 }
2381                         }
2382                 }
2383         if (alg_a & SSL_aECDSA)
2384                 {
2385                 /* key usage, if present, must allow signing */
2386                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2387                         {
2388                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2389                         return 0;
2390                         }
2391                 }
2392
2393         return 1;  /* all checks are ok */
2394         }
2395
2396 #endif
2397
2398 static int ssl_get_server_cert_index(const SSL *s)
2399         {
2400         int idx;
2401         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2402         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2403                 idx = SSL_PKEY_RSA_SIGN;
2404         if (idx == -1)
2405                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2406         return idx;
2407         }
2408
2409 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2410         {
2411         CERT *c;
2412         int i;
2413
2414         c = s->cert;
2415         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2416
2417 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2418         /* Broken protocol test: return last used certificate: which may
2419          * mismatch the one expected.
2420          */
2421         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2422                 return c->key;
2423 #endif
2424
2425         i = ssl_get_server_cert_index(s);
2426
2427         /* This may or may not be an error. */
2428         if (i < 0)
2429                 return NULL;
2430
2431         /* May be NULL. */
2432         return &c->pkeys[i];
2433         }
2434
2435 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2436         {
2437         unsigned long alg_a;
2438         CERT *c;
2439         int idx = -1;
2440
2441         alg_a = cipher->algorithm_auth;
2442         c=s->cert;
2443
2444 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2445         /* Broken protocol test: use last key: which may
2446          * mismatch the one expected.
2447          */
2448         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2449                 idx = c->key - c->pkeys;
2450         else
2451 #endif
2452
2453         if ((alg_a & SSL_aDSS) &&
2454                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2455                 idx = SSL_PKEY_DSA_SIGN;
2456         else if (alg_a & SSL_aRSA)
2457                 {
2458                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2459                         idx = SSL_PKEY_RSA_SIGN;
2460                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2461                         idx = SSL_PKEY_RSA_ENC;
2462                 }
2463         else if ((alg_a & SSL_aECDSA) &&
2464                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2465                 idx = SSL_PKEY_ECC;
2466         if (idx == -1)
2467                 {
2468                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2469                 return(NULL);
2470                 }
2471         if (pmd)
2472                 *pmd = c->pkeys[idx].digest;
2473         return c->pkeys[idx].privatekey;
2474         }
2475
2476 #ifndef OPENSSL_NO_TLSEXT
2477 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2478         {
2479         CERT *c;
2480         int i;
2481
2482         c = s->cert;
2483         i = ssl_get_server_cert_index(s);
2484
2485         if (i == -1)
2486                 return NULL;
2487
2488         *authz_length = 0;
2489         if (c->pkeys[i].authz == NULL)
2490                 return(NULL);
2491         *authz_length = c->pkeys[i].authz_length;
2492
2493         return c->pkeys[i].authz;
2494         }
2495 #endif
2496
2497 void ssl_update_cache(SSL *s,int mode)
2498         {
2499         int i;
2500
2501         /* If the session_id_length is 0, we are not supposed to cache it,
2502          * and it would be rather hard to do anyway :-) */
2503         if (s->session->session_id_length == 0) return;
2504
2505         i=s->session_ctx->session_cache_mode;
2506         if ((i & mode) && (!s->hit)
2507                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2508                     || SSL_CTX_add_session(s->session_ctx,s->session))
2509                 && (s->session_ctx->new_session_cb != NULL))
2510                 {
2511                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2512                 if (!s->session_ctx->new_session_cb(s,s->session))
2513                         SSL_SESSION_free(s->session);
2514                 }
2515
2516         /* auto flush every 255 connections */
2517         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2518                 ((i & mode) == mode))
2519                 {
2520                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2521                         ?s->session_ctx->stats.sess_connect_good
2522                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2523                         {
2524                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2525                         }
2526                 }
2527         }
2528
2529 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2530         {
2531         return(s->method);
2532         }
2533
2534 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2535         {
2536         int conn= -1;
2537         int ret=1;
2538
2539         if (s->method != meth)
2540                 {
2541                 if (s->handshake_func != NULL)
2542                         conn=(s->handshake_func == s->method->ssl_connect);
2543
2544                 if (s->method->version == meth->version)
2545                         s->method=meth;
2546                 else
2547                         {
2548                         s->method->ssl_free(s);
2549                         s->method=meth;
2550                         ret=s->method->ssl_new(s);
2551                         }
2552
2553                 if (conn == 1)
2554                         s->handshake_func=meth->ssl_connect;
2555                 else if (conn == 0)
2556                         s->handshake_func=meth->ssl_accept;
2557                 }
2558         return(ret);
2559         }
2560
2561 int SSL_get_error(const SSL *s,int i)
2562         {
2563         int reason;
2564         unsigned long l;
2565         BIO *bio;
2566
2567         if (i > 0) return(SSL_ERROR_NONE);
2568
2569         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2570          * etc, where we do encode the error */
2571         if ((l=ERR_peek_error()) != 0)
2572                 {
2573                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2574                         return(SSL_ERROR_SYSCALL);
2575                 else
2576                         return(SSL_ERROR_SSL);
2577                 }
2578
2579         if ((i < 0) && SSL_want_read(s))
2580                 {
2581                 bio=SSL_get_rbio(s);
2582                 if (BIO_should_read(bio))
2583                         return(SSL_ERROR_WANT_READ);
2584                 else if (BIO_should_write(bio))
2585                         /* This one doesn't make too much sense ... We never try
2586                          * to write to the rbio, and an application program where
2587                          * rbio and wbio are separate couldn't even know what it
2588                          * should wait for.
2589                          * However if we ever set s->rwstate incorrectly
2590                          * (so that we have SSL_want_read(s) instead of
2591                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2592                          * this test works around that bug; so it might be safer
2593                          * to keep it. */
2594                         return(SSL_ERROR_WANT_WRITE);
2595                 else if (BIO_should_io_special(bio))
2596                         {
2597                         reason=BIO_get_retry_reason(bio);
2598                         if (reason == BIO_RR_CONNECT)
2599                                 return(SSL_ERROR_WANT_CONNECT);
2600                         else if (reason == BIO_RR_ACCEPT)
2601                                 return(SSL_ERROR_WANT_ACCEPT);
2602                         else
2603                                 return(SSL_ERROR_SYSCALL); /* unknown */
2604                         }
2605                 }
2606
2607         if ((i < 0) && SSL_want_write(s))
2608                 {
2609                 bio=SSL_get_wbio(s);
2610                 if (BIO_should_write(bio))
2611                         return(SSL_ERROR_WANT_WRITE);
2612                 else if (BIO_should_read(bio))
2613                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2614                         return(SSL_ERROR_WANT_READ);
2615                 else if (BIO_should_io_special(bio))
2616                         {
2617                         reason=BIO_get_retry_reason(bio);
2618                         if (reason == BIO_RR_CONNECT)
2619                                 return(SSL_ERROR_WANT_CONNECT);
2620                         else if (reason == BIO_RR_ACCEPT)
2621                                 return(SSL_ERROR_WANT_ACCEPT);
2622                         else
2623                                 return(SSL_ERROR_SYSCALL);
2624                         }
2625                 }
2626         if ((i < 0) && SSL_want_x509_lookup(s))
2627                 {
2628                 return(SSL_ERROR_WANT_X509_LOOKUP);
2629                 }
2630
2631         if (i == 0)
2632                 {
2633                 if (s->version == SSL2_VERSION)
2634                         {
2635                         /* assume it is the socket being closed */
2636                         return(SSL_ERROR_ZERO_RETURN);
2637                         }
2638                 else
2639                         {
2640                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2641                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2642                                 return(SSL_ERROR_ZERO_RETURN);
2643                         }
2644                 }
2645         return(SSL_ERROR_SYSCALL);
2646         }
2647
2648 int SSL_do_handshake(SSL *s)
2649         {
2650         int ret=1;
2651
2652         if (s->handshake_func == NULL)
2653                 {
2654                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2655                 return(-1);
2656                 }
2657
2658         s->method->ssl_renegotiate_check(s);
2659
2660         if (SSL_in_init(s) || SSL_in_before(s))
2661                 {
2662                 ret=s->handshake_func(s);
2663                 }
2664         return(ret);
2665         }
2666
2667 /* For the next 2 functions, SSL_clear() sets shutdown and so
2668  * one of these calls will reset it */
2669 void SSL_set_accept_state(SSL *s)
2670         {
2671         s->server=1;
2672         s->shutdown=0;
2673         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2674         s->handshake_func=s->method->ssl_accept;
2675         /* clear the current cipher */
2676         ssl_clear_cipher_ctx(s);
2677         ssl_clear_hash_ctx(&s->read_hash);
2678         ssl_clear_hash_ctx(&s->write_hash);
2679         }
2680
2681 void SSL_set_connect_state(SSL *s)
2682         {
2683         s->server=0;
2684         s->shutdown=0;
2685         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2686         s->handshake_func=s->method->ssl_connect;
2687         /* clear the current cipher */
2688         ssl_clear_cipher_ctx(s);
2689         ssl_clear_hash_ctx(&s->read_hash);
2690         ssl_clear_hash_ctx(&s->write_hash);
2691         }
2692
2693 int ssl_undefined_function(SSL *s)
2694         {
2695         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2696         return(0);
2697         }
2698
2699 int ssl_undefined_void_function(void)
2700         {
2701         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2702         return(0);
2703         }
2704
2705 int ssl_undefined_const_function(const SSL *s)
2706         {
2707         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2708         return(0);
2709         }
2710
2711 SSL_METHOD *ssl_bad_method(int ver)
2712         {
2713         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2714         return(NULL);
2715         }
2716
2717 const char *SSL_get_version(const SSL *s)
2718         {
2719         if (s->version == TLS1_2_VERSION)
2720                 return("TLSv1.2");
2721         else if (s->version == TLS1_1_VERSION)
2722                 return("TLSv1.1");
2723         else if (s->version == TLS1_VERSION)
2724                 return("TLSv1");
2725         else if (s->version == SSL3_VERSION)
2726                 return("SSLv3");
2727         else if (s->version == SSL2_VERSION)
2728                 return("SSLv2");
2729         else
2730                 return("unknown");
2731         }
2732
2733 SSL *SSL_dup(SSL *s)
2734         {
2735         STACK_OF(X509_NAME) *sk;
2736         X509_NAME *xn;
2737         SSL *ret;
2738         int i;
2739
2740         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2741             return(NULL);
2742
2743         ret->version = s->version;
2744         ret->type = s->type;
2745         ret->method = s->method;
2746
2747         if (s->session != NULL)
2748                 {
2749                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2750                 SSL_copy_session_id(ret,s);
2751                 }
2752         else
2753                 {
2754                 /* No session has been established yet, so we have to expect
2755                  * that s->cert or ret->cert will be changed later --
2756                  * they should not both point to the same object,
2757                  * and thus we can't use SSL_copy_session_id. */
2758
2759                 ret->method->ssl_free(ret);
2760                 ret->method = s->method;
2761                 ret->method->ssl_new(ret);
2762
2763                 if (s->cert != NULL)
2764                         {
2765                         if (ret->cert != NULL)
2766                                 {
2767                                 ssl_cert_free(ret->cert);
2768                                 }
2769                         ret->cert = ssl_cert_dup(s->cert);
2770                         if (ret->cert == NULL)
2771                                 goto err;
2772                         }
2773
2774                 SSL_set_session_id_context(ret,
2775                         s->sid_ctx, s->sid_ctx_length);
2776                 }
2777
2778         ret->options=s->options;
2779         ret->mode=s->mode;
2780         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2781         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2782         ret->msg_callback = s->msg_callback;
2783         ret->msg_callback_arg = s->msg_callback_arg;
2784         SSL_set_verify(ret,SSL_get_verify_mode(s),
2785                 SSL_get_verify_callback(s));
2786         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2787         ret->generate_session_id = s->generate_session_id;
2788
2789         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2790
2791         ret->debug=s->debug;
2792
2793         /* copy app data, a little dangerous perhaps */
2794         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2795                 goto err;
2796
2797         /* setup rbio, and wbio */
2798         if (s->rbio != NULL)
2799                 {
2800                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2801                         goto err;
2802                 }
2803         if (s->wbio != NULL)
2804                 {
2805                 if (s->wbio != s->rbio)
2806                         {
2807                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2808                                 goto err;
2809                         }
2810                 else
2811                         ret->wbio=ret->rbio;
2812                 }
2813         ret->rwstate = s->rwstate;
2814         ret->in_handshake = s->in_handshake;
2815         ret->handshake_func = s->handshake_func;
2816         ret->server = s->server;
2817         ret->renegotiate = s->renegotiate;
2818         ret->new_session = s->new_session;
2819         ret->quiet_shutdown = s->quiet_shutdown;
2820         ret->shutdown=s->shutdown;
2821         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2822         ret->rstate=s->rstate;
2823         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2824         ret->hit=s->hit;
2825
2826         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2827
2828         /* dup the cipher_list and cipher_list_by_id stacks */
2829         if (s->cipher_list != NULL)
2830                 {
2831                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2832                         goto err;
2833                 }
2834         if (s->cipher_list_by_id != NULL)
2835                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2836                         == NULL)
2837                         goto err;
2838
2839         /* Dup the client_CA list */
2840         if (s->client_CA != NULL)
2841                 {
2842                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2843                 ret->client_CA=sk;
2844                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2845                         {
2846                         xn=sk_X509_NAME_value(sk,i);
2847                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2848                                 {
2849                                 X509_NAME_free(xn);
2850                                 goto err;
2851                                 }
2852                         }
2853                 }
2854
2855         if (0)
2856                 {
2857 err:
2858                 if (ret != NULL) SSL_free(ret);
2859                 ret=NULL;
2860                 }
2861         return(ret);
2862         }
2863
2864 void ssl_clear_cipher_ctx(SSL *s)
2865         {
2866         if (s->enc_read_ctx != NULL)
2867                 {
2868                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2869                 OPENSSL_free(s->enc_read_ctx);
2870                 s->enc_read_ctx=NULL;
2871                 }
2872         if (s->enc_write_ctx != NULL)
2873                 {
2874                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2875                 OPENSSL_free(s->enc_write_ctx);
2876                 s->enc_write_ctx=NULL;
2877                 }
2878 #ifndef OPENSSL_NO_COMP
2879         if (s->expand != NULL)
2880                 {
2881                 COMP_CTX_free(s->expand);
2882                 s->expand=NULL;
2883                 }
2884         if (s->compress != NULL)
2885                 {
2886                 COMP_CTX_free(s->compress);
2887                 s->compress=NULL;
2888                 }
2889 #endif
2890         }
2891
2892 /* Fix this function so that it takes an optional type parameter */
2893 X509 *SSL_get_certificate(const SSL *s)
2894         {
2895         if (s->cert != NULL)
2896                 return(s->cert->key->x509);
2897         else
2898                 return(NULL);
2899         }
2900
2901 /* Fix this function so that it takes an optional type parameter */
2902 EVP_PKEY *SSL_get_privatekey(SSL *s)
2903         {
2904         if (s->cert != NULL)
2905                 return(s->cert->key->privatekey);
2906         else
2907                 return(NULL);
2908         }
2909
2910 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2911         {
2912         if ((s->session != NULL) && (s->session->cipher != NULL))
2913                 return(s->session->cipher);
2914         return(NULL);
2915         }
2916 #ifdef OPENSSL_NO_COMP
2917 const void *SSL_get_current_compression(SSL *s)
2918         {
2919         return NULL;
2920         }
2921 const void *SSL_get_current_expansion(SSL *s)
2922         {
2923         return NULL;
2924         }
2925 #else
2926
2927 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2928         {
2929         if (s->compress != NULL)
2930                 return(s->compress->meth);
2931         return(NULL);
2932         }
2933
2934 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2935         {
2936         if (s->expand != NULL)
2937                 return(s->expand->meth);
2938         return(NULL);
2939         }
2940 #endif
2941
2942 int ssl_init_wbio_buffer(SSL *s,int push)
2943         {
2944         BIO *bbio;
2945
2946         if (s->bbio == NULL)
2947                 {
2948                 bbio=BIO_new(BIO_f_buffer());
2949                 if (bbio == NULL) return(0);
2950                 s->bbio=bbio;
2951                 }
2952         else
2953                 {
2954                 bbio=s->bbio;
2955                 if (s->bbio == s->wbio)
2956                         s->wbio=BIO_pop(s->wbio);
2957                 }
2958         (void)BIO_reset(bbio);
2959 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2960         if (!BIO_set_read_buffer_size(bbio,1))
2961                 {
2962                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2963                 return(0);
2964                 }
2965         if (push)
2966                 {
2967                 if (s->wbio != bbio)
2968                         s->wbio=BIO_push(bbio,s->wbio);
2969                 }
2970         else
2971                 {
2972                 if (s->wbio == bbio)
2973                         s->wbio=BIO_pop(bbio);
2974                 }
2975         return(1);
2976         }
2977
2978 void ssl_free_wbio_buffer(SSL *s)
2979         {
2980         if (s->bbio == NULL) return;
2981
2982         if (s->bbio == s->wbio)
2983                 {
2984                 /* remove buffering */
2985                 s->wbio=BIO_pop(s->wbio);
2986 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2987                 assert(s->wbio != NULL);
2988 #endif
2989         }
2990         BIO_free(s->bbio);
2991         s->bbio=NULL;
2992         }
2993
2994 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2995         {
2996         ctx->quiet_shutdown=mode;
2997         }
2998
2999 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3000         {
3001         return(ctx->quiet_shutdown);
3002         }
3003
3004 void SSL_set_quiet_shutdown(SSL *s,int mode)
3005         {
3006         s->quiet_shutdown=mode;
3007         }
3008
3009 int SSL_get_quiet_shutdown(const SSL *s)
3010         {
3011         return(s->quiet_shutdown);
3012         }
3013
3014 void SSL_set_shutdown(SSL *s,int mode)
3015         {
3016         s->shutdown=mode;
3017         }
3018
3019 int SSL_get_shutdown(const SSL *s)
3020         {
3021         return(s->shutdown);
3022         }
3023
3024 int SSL_version(const SSL *s)
3025         {
3026         return(s->version);
3027         }
3028
3029 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3030         {
3031         return(ssl->ctx);
3032         }
3033
3034 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3035         {
3036         if (ssl->ctx == ctx)
3037                 return ssl->ctx;
3038 #ifndef OPENSSL_NO_TLSEXT
3039         if (ctx == NULL)
3040                 ctx = ssl->initial_ctx;
3041 #endif
3042         if (ssl->cert != NULL)
3043                 ssl_cert_free(ssl->cert);
3044         ssl->cert = ssl_cert_dup(ctx->cert);
3045         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3046         if (ssl->ctx != NULL)
3047                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3048         ssl->ctx = ctx;
3049         return(ssl->ctx);
3050         }
3051
3052 #ifndef OPENSSL_NO_STDIO
3053 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3054         {
3055         return(X509_STORE_set_default_paths(ctx->cert_store));
3056         }
3057
3058 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3059                 const char *CApath)
3060         {
3061         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3062         }
3063 #endif
3064
3065 void SSL_set_info_callback(SSL *ssl,
3066         void (*cb)(const SSL *ssl,int type,int val))
3067         {
3068         ssl->info_callback=cb;
3069         }
3070
3071 /* One compiler (Diab DCC) doesn't like argument names in returned
3072    function pointer.  */
3073 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3074         {
3075         return ssl->info_callback;
3076         }
3077
3078 int SSL_state(const SSL *ssl)
3079         {
3080         return(ssl->state);
3081         }
3082
3083 void SSL_set_state(SSL *ssl, int state)
3084         {
3085         ssl->state = state;
3086         }
3087
3088 void SSL_set_verify_result(SSL *ssl,long arg)
3089         {
3090         ssl->verify_result=arg;
3091         }
3092
3093 long SSL_get_verify_result(const SSL *ssl)
3094         {
3095         return(ssl->verify_result);
3096         }
3097
3098 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3099                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3100         {
3101         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3102                                 new_func, dup_func, free_func);
3103         }
3104
3105 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3106         {
3107         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3108         }
3109
3110 void *SSL_get_ex_data(const SSL *s,int idx)
3111         {
3112         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3113         }
3114
3115 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3116                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3117         {
3118         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3119                                 new_func, dup_func, free_func);
3120         }
3121
3122 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3123         {
3124         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3125         }
3126
3127 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3128         {
3129         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3130         }
3131
3132 int ssl_ok(SSL *s)
3133         {
3134         return(1);
3135         }
3136
3137 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3138         {
3139         return(ctx->cert_store);
3140         }
3141
3142 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3143         {
3144         if (ctx->cert_store != NULL)
3145                 X509_STORE_free(ctx->cert_store);
3146         ctx->cert_store=store;
3147         }
3148
3149 int SSL_want(const SSL *s)
3150         {
3151         return(s->rwstate);
3152         }
3153
3154 /*!
3155  * \brief Set the callback for generating temporary RSA keys.
3156  * \param ctx the SSL context.
3157  * \param cb the callback
3158  */
3159
3160 #ifndef OPENSSL_NO_RSA
3161 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3162                                                           int is_export,
3163                                                           int keylength))
3164     {
3165     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3166     }
3167
3168 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3169                                                   int is_export,
3170                                                   int keylength))
3171     {
3172     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3173     }
3174 #endif
3175
3176 #ifdef DOXYGEN
3177 /*!
3178  * \brief The RSA temporary key callback function.
3179  * \param ssl the SSL session.
3180  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3181  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3182  * of the required key in bits.
3183  * \return the temporary RSA key.
3184  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3185  */
3186
3187 RSA *cb(SSL *ssl,int is_export,int keylength)
3188     {}
3189 #endif
3190
3191 /*!
3192  * \brief Set the callback for generating temporary DH keys.
3193  * \param ctx the SSL context.
3194  * \param dh the callback
3195  */
3196
3197 #ifndef OPENSSL_NO_DH
3198 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3199                                                         int keylength))
3200         {
3201         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3202         }
3203
3204 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3205                                                 int keylength))
3206         {
3207         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3208         }
3209 #endif
3210
3211 #ifndef OPENSSL_NO_ECDH
3212 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3213                                                                 int keylength))
3214         {
3215         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3216         }
3217
3218 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3219                                                         int keylength))
3220         {
3221         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3222         }
3223 #endif
3224
3225 #ifndef OPENSSL_NO_PSK
3226 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3227         {
3228         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3229                 {
3230                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3231                 return 0;
3232                 }
3233         if (ctx->psk_identity_hint != NULL)
3234                 OPENSSL_free(ctx->psk_identity_hint);
3235         if (identity_hint != NULL)
3236                 {
3237                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3238                 if (ctx->psk_identity_hint == NULL)
3239                         return 0;
3240                 }
3241         else
3242                 ctx->psk_identity_hint = NULL;
3243         return 1;
3244         }
3245
3246 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3247         {
3248         if (s == NULL)
3249                 return 0;
3250
3251         if (s->session == NULL)
3252                 return 1; /* session not created yet, ignored */
3253
3254         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3255                 {
3256                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3257                 return 0;
3258                 }
3259         if (s->session->psk_identity_hint != NULL)
3260                 OPENSSL_free(s->session->psk_identity_hint);
3261         if (identity_hint != NULL)
3262                 {
3263                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3264                 if (s->session->psk_identity_hint == NULL)
3265                         return 0;
3266                 }
3267         else
3268                 s->session->psk_identity_hint = NULL;
3269         return 1;
3270         }
3271
3272 const char *SSL_get_psk_identity_hint(const SSL *s)
3273         {
3274         if (s == NULL || s->session == NULL)
3275                 return NULL;
3276         return(s->session->psk_identity_hint);
3277         }
3278
3279 const char *SSL_get_psk_identity(const SSL *s)
3280         {
3281         if (s == NULL || s->session == NULL)
3282                 return NULL;
3283         return(s->session->psk_identity);
3284         }
3285
3286 void SSL_set_psk_client_callback(SSL *s,
3287     unsigned int (*cb)(SSL *ssl, const char *hint,
3288                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3289                        unsigned int max_psk_len))
3290         {
3291         s->psk_client_callback = cb;
3292         }
3293
3294 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3295     unsigned int (*cb)(SSL *ssl, const char *hint,
3296                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3297                        unsigned int max_psk_len))
3298         {
3299         ctx->psk_client_callback = cb;
3300         }
3301
3302 void SSL_set_psk_server_callback(SSL *s,
3303     unsigned int (*cb)(SSL *ssl, const char *identity,
3304                        unsigned char *psk, unsigned int max_psk_len))
3305         {
3306         s->psk_server_callback = cb;
3307         }
3308
3309 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3310     unsigned int (*cb)(SSL *ssl, const char *identity,
3311                        unsigned char *psk, unsigned int max_psk_len))
3312         {
3313         ctx->psk_server_callback = cb;
3314         }
3315 #endif
3316
3317 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))
3318         {
3319         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3320         }
3321 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))
3322         {
3323         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3324         }
3325
3326 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3327  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3328  * any. If EVP_MD pointer is passed, initializes ctx with this md
3329  * Returns newly allocated ctx;
3330  */
3331
3332 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3333 {
3334         ssl_clear_hash_ctx(hash);
3335         *hash = EVP_MD_CTX_create();
3336         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3337         return *hash;
3338 }
3339 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3340 {
3341
3342         if (*hash) EVP_MD_CTX_destroy(*hash);
3343         *hash=NULL;
3344 }
3345
3346 void SSL_set_debug(SSL *s, int debug)
3347         {
3348         s->debug = debug;
3349         }
3350
3351 int SSL_cache_hit(SSL *s)
3352         {
3353         return s->hit;
3354         }
3355
3356 int SSL_is_server(SSL *s)
3357         {
3358         return s->server;
3359         }
3360
3361 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3362 #include "../crypto/bio/bss_file.c"
3363 #endif
3364
3365 IMPLEMENT_STACK_OF(SSL_CIPHER)
3366 IMPLEMENT_STACK_OF(SSL_COMP)
3367 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3368                                     ssl_cipher_id);