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_IS_DTLS(s))
1120                         {
1121                         s->d1->mtu = larg;
1122                         return larg;
1123                         }
1124                 return 0;
1125         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1126                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1127                         return 0;
1128                 s->max_send_fragment = larg;
1129                 return 1;
1130         case SSL_CTRL_GET_RI_SUPPORT:
1131                 if (s->s3)
1132                         return s->s3->send_connection_binding;
1133                 else return 0;
1134         case SSL_CTRL_CERT_FLAGS:
1135                 return(s->cert->cert_flags|=larg);
1136         case SSL_CTRL_CLEAR_CERT_FLAGS:
1137                 return(s->cert->cert_flags &=~larg);
1138
1139         case SSL_CTRL_GET_RAW_CIPHERLIST:
1140                 if (parg)
1141                         {
1142                         if (s->cert->ciphers_raw == NULL)
1143                                 return 0;
1144                         *(unsigned char **)parg = s->cert->ciphers_raw;
1145                         return (int)s->cert->ciphers_rawlen;
1146                         }
1147                 else
1148                         return ssl_put_cipher_by_char(s,NULL,NULL);
1149 #ifndef OPENSSL_NO_DANE
1150         case SSL_CTRL_PULL_TLSA_RECORD:
1151                 parg = SSL_get_tlsa_record_byname (parg,larg,s->version<0xF000?1:0);
1152                 /* yes, fall through */
1153         case SSL_CTRL_SET_TLSA_RECORD:
1154                 s->tlsa_record = parg;
1155                 return 1;
1156 #endif
1157         default:
1158                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1159                 }
1160         }
1161
1162 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1163         {
1164         switch(cmd)
1165                 {
1166         case SSL_CTRL_SET_MSG_CALLBACK:
1167                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1168                 return 1;
1169
1170         default:
1171                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1172                 }
1173         }
1174
1175 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1176         {
1177         return ctx->sessions;
1178         }
1179
1180 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1181         {
1182         long l;
1183         /* For some cases with ctx == NULL perform syntax checks */
1184         if (ctx == NULL)
1185                 {
1186                 switch (cmd)
1187                         {
1188 #ifndef OPENSSL_NO_EC
1189                 case SSL_CTRL_SET_CURVES_LIST:
1190                         return tls1_set_curves_list(NULL, NULL, parg);
1191 #endif
1192                 case SSL_CTRL_SET_SIGALGS_LIST:
1193                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1194                         return tls1_set_sigalgs_list(NULL, parg, 0);
1195                 default:
1196                         return 0;
1197                         }
1198                 }
1199
1200         switch (cmd)
1201                 {
1202         case SSL_CTRL_GET_READ_AHEAD:
1203                 return(ctx->read_ahead);
1204         case SSL_CTRL_SET_READ_AHEAD:
1205                 l=ctx->read_ahead;
1206                 ctx->read_ahead=larg;
1207                 return(l);
1208
1209         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1210                 ctx->msg_callback_arg = parg;
1211                 return 1;
1212
1213         case SSL_CTRL_GET_MAX_CERT_LIST:
1214                 return(ctx->max_cert_list);
1215         case SSL_CTRL_SET_MAX_CERT_LIST:
1216                 l=ctx->max_cert_list;
1217                 ctx->max_cert_list=larg;
1218                 return(l);
1219
1220         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1221                 l=ctx->session_cache_size;
1222                 ctx->session_cache_size=larg;
1223                 return(l);
1224         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1225                 return(ctx->session_cache_size);
1226         case SSL_CTRL_SET_SESS_CACHE_MODE:
1227                 l=ctx->session_cache_mode;
1228                 ctx->session_cache_mode=larg;
1229                 return(l);
1230         case SSL_CTRL_GET_SESS_CACHE_MODE:
1231                 return(ctx->session_cache_mode);
1232
1233         case SSL_CTRL_SESS_NUMBER:
1234                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1235         case SSL_CTRL_SESS_CONNECT:
1236                 return(ctx->stats.sess_connect);
1237         case SSL_CTRL_SESS_CONNECT_GOOD:
1238                 return(ctx->stats.sess_connect_good);
1239         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1240                 return(ctx->stats.sess_connect_renegotiate);
1241         case SSL_CTRL_SESS_ACCEPT:
1242                 return(ctx->stats.sess_accept);
1243         case SSL_CTRL_SESS_ACCEPT_GOOD:
1244                 return(ctx->stats.sess_accept_good);
1245         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1246                 return(ctx->stats.sess_accept_renegotiate);
1247         case SSL_CTRL_SESS_HIT:
1248                 return(ctx->stats.sess_hit);
1249         case SSL_CTRL_SESS_CB_HIT:
1250                 return(ctx->stats.sess_cb_hit);
1251         case SSL_CTRL_SESS_MISSES:
1252                 return(ctx->stats.sess_miss);
1253         case SSL_CTRL_SESS_TIMEOUTS:
1254                 return(ctx->stats.sess_timeout);
1255         case SSL_CTRL_SESS_CACHE_FULL:
1256                 return(ctx->stats.sess_cache_full);
1257         case SSL_CTRL_OPTIONS:
1258                 return(ctx->options|=larg);
1259         case SSL_CTRL_CLEAR_OPTIONS:
1260                 return(ctx->options&=~larg);
1261         case SSL_CTRL_MODE:
1262                 return(ctx->mode|=larg);
1263         case SSL_CTRL_CLEAR_MODE:
1264                 return(ctx->mode&=~larg);
1265         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1266                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1267                         return 0;
1268                 ctx->max_send_fragment = larg;
1269                 return 1;
1270         case SSL_CTRL_CERT_FLAGS:
1271                 return(ctx->cert->cert_flags|=larg);
1272         case SSL_CTRL_CLEAR_CERT_FLAGS:
1273                 return(ctx->cert->cert_flags &=~larg);
1274         default:
1275                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1276                 }
1277         }
1278
1279 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1280         {
1281         switch(cmd)
1282                 {
1283         case SSL_CTRL_SET_MSG_CALLBACK:
1284                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1285                 return 1;
1286
1287         default:
1288                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1289                 }
1290         }
1291
1292 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1293         {
1294         long l;
1295
1296         l=a->id-b->id;
1297         if (l == 0L)
1298                 return(0);
1299         else
1300                 return((l > 0)?1:-1);
1301         }
1302
1303 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1304                         const SSL_CIPHER * const *bp)
1305         {
1306         long l;
1307
1308         l=(*ap)->id-(*bp)->id;
1309         if (l == 0L)
1310                 return(0);
1311         else
1312                 return((l > 0)?1:-1);
1313         }
1314
1315 /** return a STACK of the ciphers available for the SSL and in order of
1316  * preference */
1317 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1318         {
1319         if (s != NULL)
1320                 {
1321                 if (s->cipher_list != NULL)
1322                         {
1323                         return(s->cipher_list);
1324                         }
1325                 else if ((s->ctx != NULL) &&
1326                         (s->ctx->cipher_list != NULL))
1327                         {
1328                         return(s->ctx->cipher_list);
1329                         }
1330                 }
1331         return(NULL);
1332         }
1333
1334 /** return a STACK of the ciphers available for the SSL and in order of
1335  * algorithm id */
1336 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1337         {
1338         if (s != NULL)
1339                 {
1340                 if (s->cipher_list_by_id != NULL)
1341                         {
1342                         return(s->cipher_list_by_id);
1343                         }
1344                 else if ((s->ctx != NULL) &&
1345                         (s->ctx->cipher_list_by_id != NULL))
1346                         {
1347                         return(s->ctx->cipher_list_by_id);
1348                         }
1349                 }
1350         return(NULL);
1351         }
1352
1353 /** The old interface to get the same thing as SSL_get_ciphers() */
1354 const char *SSL_get_cipher_list(const SSL *s,int n)
1355         {
1356         SSL_CIPHER *c;
1357         STACK_OF(SSL_CIPHER) *sk;
1358
1359         if (s == NULL) return(NULL);
1360         sk=SSL_get_ciphers(s);
1361         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1362                 return(NULL);
1363         c=sk_SSL_CIPHER_value(sk,n);
1364         if (c == NULL) return(NULL);
1365         return(c->name);
1366         }
1367
1368 /** specify the ciphers to be used by default by the SSL_CTX */
1369 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1370         {
1371         STACK_OF(SSL_CIPHER) *sk;
1372
1373         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1374                 &ctx->cipher_list_by_id,str, ctx->cert);
1375         /* ssl_create_cipher_list may return an empty stack if it
1376          * was unable to find a cipher matching the given rule string
1377          * (for example if the rule string specifies a cipher which
1378          * has been disabled). This is not an error as far as
1379          * ssl_create_cipher_list is concerned, and hence
1380          * ctx->cipher_list and ctx->cipher_list_by_id has been
1381          * updated. */
1382         if (sk == NULL)
1383                 return 0;
1384         else if (sk_SSL_CIPHER_num(sk) == 0)
1385                 {
1386                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1387                 return 0;
1388                 }
1389         return 1;
1390         }
1391
1392 /** specify the ciphers to be used by the SSL */
1393 int SSL_set_cipher_list(SSL *s,const char *str)
1394         {
1395         STACK_OF(SSL_CIPHER) *sk;
1396
1397         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1398                 &s->cipher_list_by_id,str, s->cert);
1399         /* see comment in SSL_CTX_set_cipher_list */
1400         if (sk == NULL)
1401                 return 0;
1402         else if (sk_SSL_CIPHER_num(sk) == 0)
1403                 {
1404                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1405                 return 0;
1406                 }
1407         return 1;
1408         }
1409
1410 /* works well for SSLv2, not so good for SSLv3 */
1411 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1412         {
1413         char *p;
1414         STACK_OF(SSL_CIPHER) *sk;
1415         SSL_CIPHER *c;
1416         int i;
1417
1418         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1419                 (len < 2))
1420                 return(NULL);
1421
1422         p=buf;
1423         sk=s->session->ciphers;
1424         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1425                 {
1426                 int n;
1427
1428                 c=sk_SSL_CIPHER_value(sk,i);
1429                 n=strlen(c->name);
1430                 if (n+1 > len)
1431                         {
1432                         if (p != buf)
1433                                 --p;
1434                         *p='\0';
1435                         return buf;
1436                         }
1437                 strcpy(p,c->name);
1438                 p+=n;
1439                 *(p++)=':';
1440                 len-=n+1;
1441                 }
1442         p[-1]='\0';
1443         return(buf);
1444         }
1445
1446 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1447                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1448         {
1449         int i,j=0;
1450         SSL_CIPHER *c;
1451         CERT *ct = s->cert;
1452         unsigned char *q;
1453         int no_scsv = s->renegotiate;
1454         /* Set disabled masks for this session */
1455         ssl_set_client_disabled(s);
1456
1457         if (sk == NULL) return(0);
1458         q=p;
1459
1460         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1461                 {
1462                 c=sk_SSL_CIPHER_value(sk,i);
1463                 /* Skip disabled ciphers */
1464                 if (c->algorithm_ssl & ct->mask_ssl ||
1465                         c->algorithm_mkey & ct->mask_k ||
1466                         c->algorithm_auth & ct->mask_a)
1467                         continue;
1468 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1469                 if (c->id == SSL3_CK_SCSV)
1470                         {
1471                         if (no_scsv)
1472                                 continue;
1473                         else
1474                                 no_scsv = 1;
1475                         }
1476 #endif
1477                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1478                 p+=j;
1479                 }
1480         /* If p == q, no ciphers and caller indicates an error. Otherwise
1481          * add SCSV if not renegotiating.
1482          */
1483         if (p != q && !no_scsv)
1484                 {
1485                 static SSL_CIPHER scsv =
1486                         {
1487                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1488                         };
1489                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1490                 p+=j;
1491 #ifdef OPENSSL_RI_DEBUG
1492                 fprintf(stderr, "SCSV sent by client\n");
1493 #endif
1494                 }
1495
1496         return(p-q);
1497         }
1498
1499 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1500                                                STACK_OF(SSL_CIPHER) **skp)
1501         {
1502         const SSL_CIPHER *c;
1503         STACK_OF(SSL_CIPHER) *sk;
1504         int i,n;
1505         if (s->s3)
1506                 s->s3->send_connection_binding = 0;
1507
1508         n=ssl_put_cipher_by_char(s,NULL,NULL);
1509         if ((num%n) != 0)
1510                 {
1511                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1512                 return(NULL);
1513                 }
1514         if ((skp == NULL) || (*skp == NULL))
1515                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1516         else
1517                 {
1518                 sk= *skp;
1519                 sk_SSL_CIPHER_zero(sk);
1520                 }
1521
1522         if (s->cert->ciphers_raw)
1523                 OPENSSL_free(s->cert->ciphers_raw);
1524         s->cert->ciphers_raw = BUF_memdup(p, num);
1525         if (s->cert->ciphers_raw == NULL)
1526                 {
1527                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1528                 goto err;
1529                 }
1530         s->cert->ciphers_rawlen = (size_t)num;
1531
1532         for (i=0; i<num; i+=n)
1533                 {
1534                 /* Check for SCSV */
1535                 if (s->s3 && (n != 3 || !p[0]) &&
1536                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1537                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1538                         {
1539                         /* SCSV fatal if renegotiating */
1540                         if (s->renegotiate)
1541                                 {
1542                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1543                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1544                                 goto err;
1545                                 }
1546                         s->s3->send_connection_binding = 1;
1547                         p += n;
1548 #ifdef OPENSSL_RI_DEBUG
1549                         fprintf(stderr, "SCSV received by server\n");
1550 #endif
1551                         continue;
1552                         }
1553
1554                 c=ssl_get_cipher_by_char(s,p);
1555                 p+=n;
1556                 if (c != NULL)
1557                         {
1558                         if (!sk_SSL_CIPHER_push(sk,c))
1559                                 {
1560                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1561                                 goto err;
1562                                 }
1563                         }
1564                 }
1565
1566         if (skp != NULL)
1567                 *skp=sk;
1568         return(sk);
1569 err:
1570         if ((skp == NULL) || (*skp == NULL))
1571                 sk_SSL_CIPHER_free(sk);
1572         return(NULL);
1573         }
1574
1575
1576 #ifndef OPENSSL_NO_TLSEXT
1577 /** return a servername extension value if provided in Client Hello, or NULL.
1578  * So far, only host_name types are defined (RFC 3546).
1579  */
1580
1581 const char *SSL_get_servername(const SSL *s, const int type)
1582         {
1583         if (type != TLSEXT_NAMETYPE_host_name)
1584                 return NULL;
1585
1586         return s->session && !s->tlsext_hostname ?
1587                 s->session->tlsext_hostname :
1588                 s->tlsext_hostname;
1589         }
1590
1591 int SSL_get_servername_type(const SSL *s)
1592         {
1593         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1594                 return TLSEXT_NAMETYPE_host_name;
1595         return -1;
1596         }
1597
1598 # ifndef OPENSSL_NO_NEXTPROTONEG
1599 /* SSL_select_next_proto implements the standard protocol selection. It is
1600  * expected that this function is called from the callback set by
1601  * SSL_CTX_set_next_proto_select_cb.
1602  *
1603  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1604  * strings. The length byte itself is not included in the length. A byte
1605  * string of length 0 is invalid. No byte string may be truncated.
1606  *
1607  * The current, but experimental algorithm for selecting the protocol is:
1608  *
1609  * 1) If the server doesn't support NPN then this is indicated to the
1610  * callback. In this case, the client application has to abort the connection
1611  * or have a default application level protocol.
1612  *
1613  * 2) If the server supports NPN, but advertises an empty list then the
1614  * client selects the first protcol in its list, but indicates via the
1615  * API that this fallback case was enacted.
1616  *
1617  * 3) Otherwise, the client finds the first protocol in the server's list
1618  * that it supports and selects this protocol. This is because it's
1619  * assumed that the server has better information about which protocol
1620  * a client should use.
1621  *
1622  * 4) If the client doesn't support any of the server's advertised
1623  * protocols, then this is treated the same as case 2.
1624  *
1625  * It returns either
1626  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1627  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1628  */
1629 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)
1630         {
1631         unsigned int i, j;
1632         const unsigned char *result;
1633         int status = OPENSSL_NPN_UNSUPPORTED;
1634
1635         /* For each protocol in server preference order, see if we support it. */
1636         for (i = 0; i < server_len; )
1637                 {
1638                 for (j = 0; j < client_len; )
1639                         {
1640                         if (server[i] == client[j] &&
1641                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1642                                 {
1643                                 /* We found a match */
1644                                 result = &server[i];
1645                                 status = OPENSSL_NPN_NEGOTIATED;
1646                                 goto found;
1647                                 }
1648                         j += client[j];
1649                         j++;
1650                         }
1651                 i += server[i];
1652                 i++;
1653                 }
1654
1655         /* There's no overlap between our protocols and the server's list. */
1656         result = client;
1657         status = OPENSSL_NPN_NO_OVERLAP;
1658
1659         found:
1660         *out = (unsigned char *) result + 1;
1661         *outlen = result[0];
1662         return status;
1663         }
1664
1665 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1666  * requested protocol for this connection and returns 0. If the client didn't
1667  * request any protocol, then *data is set to NULL.
1668  *
1669  * Note that the client can request any protocol it chooses. The value returned
1670  * from this function need not be a member of the list of supported protocols
1671  * provided by the callback.
1672  */
1673 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1674         {
1675         *data = s->next_proto_negotiated;
1676         if (!*data) {
1677                 *len = 0;
1678         } else {
1679                 *len = s->next_proto_negotiated_len;
1680         }
1681 }
1682
1683 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1684  * TLS server needs a list of supported protocols for Next Protocol
1685  * Negotiation. The returned list must be in wire format.  The list is returned
1686  * by setting |out| to point to it and |outlen| to its length. This memory will
1687  * not be modified, but one should assume that the SSL* keeps a reference to
1688  * it.
1689  *
1690  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1691  * such extension will be included in the ServerHello. */
1692 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)
1693         {
1694         ctx->next_protos_advertised_cb = cb;
1695         ctx->next_protos_advertised_cb_arg = arg;
1696         }
1697
1698 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1699  * client needs to select a protocol from the server's provided list. |out|
1700  * must be set to point to the selected protocol (which may be within |in|).
1701  * The length of the protocol name must be written into |outlen|. The server's
1702  * advertised protocols are provided in |in| and |inlen|. The callback can
1703  * assume that |in| is syntactically valid.
1704  *
1705  * The client must select a protocol. It is fatal to the connection if this
1706  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1707  */
1708 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)
1709         {
1710         ctx->next_proto_select_cb = cb;
1711         ctx->next_proto_select_cb_arg = arg;
1712         }
1713 # endif
1714
1715 int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
1716                                custom_cli_ext_first_cb_fn fn1,
1717                                custom_cli_ext_second_cb_fn fn2, void* arg)
1718         {
1719         size_t i;
1720         custom_cli_ext_record* record;
1721
1722         /* Check for duplicates */
1723         for (i=0; i < ctx->custom_cli_ext_records_count; i++)
1724                 if (ext_type == ctx->custom_cli_ext_records[i].ext_type)
1725                         return 0;
1726
1727         ctx->custom_cli_ext_records = OPENSSL_realloc(ctx->custom_cli_ext_records,
1728                                                       (ctx->custom_cli_ext_records_count + 1) *
1729                                                       sizeof(custom_cli_ext_record));
1730         if (!ctx->custom_cli_ext_records) {
1731                 ctx->custom_cli_ext_records_count = 0;
1732                 return 0;
1733         }
1734         ctx->custom_cli_ext_records_count++;
1735         record = &ctx->custom_cli_ext_records[ctx->custom_cli_ext_records_count - 1];
1736         record->ext_type = ext_type;
1737         record->fn1 = fn1;
1738         record->fn2 = fn2;
1739         record->arg = arg;
1740         return 1;
1741         }
1742
1743 int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
1744                                custom_srv_ext_first_cb_fn fn1,
1745                                custom_srv_ext_second_cb_fn fn2, void* arg)
1746         {
1747         size_t i;
1748         custom_srv_ext_record* record;
1749
1750         /* Check for duplicates */
1751         for (i=0; i < ctx->custom_srv_ext_records_count; i++)
1752                 if (ext_type == ctx->custom_srv_ext_records[i].ext_type)
1753                         return 0;
1754
1755         ctx->custom_srv_ext_records = OPENSSL_realloc(ctx->custom_srv_ext_records,
1756                                                       (ctx->custom_srv_ext_records_count + 1) *
1757                                                       sizeof(custom_srv_ext_record));
1758         if (!ctx->custom_srv_ext_records) {
1759                 ctx->custom_srv_ext_records_count = 0;
1760                 return 0;
1761         }
1762         ctx->custom_srv_ext_records_count++;
1763         record = &ctx->custom_srv_ext_records[ctx->custom_srv_ext_records_count - 1];
1764         record->ext_type = ext_type;
1765         record->fn1 = fn1;
1766         record->fn2 = fn2;
1767         record->arg = arg;
1768         return 1;
1769         }
1770
1771 #endif
1772
1773 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1774         const char *label, size_t llen, const unsigned char *p, size_t plen,
1775         int use_context)
1776         {
1777         if (s->version < TLS1_VERSION)
1778                 return -1;
1779
1780         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1781                                                            llen, p, plen,
1782                                                            use_context);
1783         }
1784
1785 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1786         {
1787         unsigned long l;
1788
1789         l=(unsigned long)
1790                 ((unsigned int) a->session_id[0]     )|
1791                 ((unsigned int) a->session_id[1]<< 8L)|
1792                 ((unsigned long)a->session_id[2]<<16L)|
1793                 ((unsigned long)a->session_id[3]<<24L);
1794         return(l);
1795         }
1796
1797 /* NB: If this function (or indeed the hash function which uses a sort of
1798  * coarser function than this one) is changed, ensure
1799  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1800  * able to construct an SSL_SESSION that will collide with any existing session
1801  * with a matching session ID. */
1802 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1803         {
1804         if (a->ssl_version != b->ssl_version)
1805                 return(1);
1806         if (a->session_id_length != b->session_id_length)
1807                 return(1);
1808         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1809         }
1810
1811 /* These wrapper functions should remain rather than redeclaring
1812  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1813  * variable. The reason is that the functions aren't static, they're exposed via
1814  * ssl.h. */
1815 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1816 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1817
1818 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1819         {
1820         SSL_CTX *ret=NULL;
1821
1822         if (meth == NULL)
1823                 {
1824                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1825                 return(NULL);
1826                 }
1827
1828 #ifdef OPENSSL_FIPS
1829         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1830                 {
1831                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1832                 return NULL;
1833                 }
1834 #endif
1835
1836         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1837                 {
1838                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1839                 goto err;
1840                 }
1841         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1842         if (ret == NULL)
1843                 goto err;
1844
1845         memset(ret,0,sizeof(SSL_CTX));
1846
1847         ret->method=meth;
1848
1849         ret->cert_store=NULL;
1850         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1851         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1852         ret->session_cache_head=NULL;
1853         ret->session_cache_tail=NULL;
1854
1855         /* We take the system default */
1856         ret->session_timeout=meth->get_timeout();
1857
1858         ret->new_session_cb=0;
1859         ret->remove_session_cb=0;
1860         ret->get_session_cb=0;
1861         ret->generate_session_id=0;
1862
1863         memset((char *)&ret->stats,0,sizeof(ret->stats));
1864
1865         ret->references=1;
1866         ret->quiet_shutdown=0;
1867
1868 /*      ret->cipher=NULL;*/
1869 /*      ret->s2->challenge=NULL;
1870         ret->master_key=NULL;
1871         ret->key_arg=NULL;
1872         ret->s2->conn_id=NULL; */
1873
1874         ret->info_callback=NULL;
1875
1876         ret->app_verify_callback=0;
1877         ret->app_verify_arg=NULL;
1878
1879         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1880         ret->read_ahead=0;
1881         ret->msg_callback=0;
1882         ret->msg_callback_arg=NULL;
1883         ret->verify_mode=SSL_VERIFY_NONE;
1884 #if 0
1885         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1886 #endif
1887         ret->sid_ctx_length=0;
1888         ret->default_verify_callback=NULL;
1889         if ((ret->cert=ssl_cert_new()) == NULL)
1890                 goto err;
1891
1892         ret->default_passwd_callback=0;
1893         ret->default_passwd_callback_userdata=NULL;
1894         ret->client_cert_cb=0;
1895         ret->app_gen_cookie_cb=0;
1896         ret->app_verify_cookie_cb=0;
1897
1898         ret->sessions=lh_SSL_SESSION_new();
1899         if (ret->sessions == NULL) goto err;
1900         ret->cert_store=X509_STORE_new();
1901         if (ret->cert_store == NULL) goto err;
1902
1903         ssl_create_cipher_list(ret->method,
1904                 &ret->cipher_list,&ret->cipher_list_by_id,
1905                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1906         if (ret->cipher_list == NULL
1907             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1908                 {
1909                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1910                 goto err2;
1911                 }
1912
1913         ret->param = X509_VERIFY_PARAM_new();
1914         if (!ret->param)
1915                 goto err;
1916
1917         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1918                 {
1919                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1920                 goto err2;
1921                 }
1922         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1923                 {
1924                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1925                 goto err2;
1926                 }
1927         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1928                 {
1929                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1930                 goto err2;
1931                 }
1932
1933         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1934                 goto err;
1935
1936         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1937
1938         ret->extra_certs=NULL;
1939         /* No compression for DTLS */
1940         if (meth->version != DTLS1_VERSION)
1941                 ret->comp_methods=SSL_COMP_get_compression_methods();
1942
1943         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1944
1945 #ifndef OPENSSL_NO_TLSEXT
1946         ret->tlsext_servername_callback = 0;
1947         ret->tlsext_servername_arg = NULL;
1948         /* Setup RFC4507 ticket keys */
1949         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1950                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1951                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1952                 ret->options |= SSL_OP_NO_TICKET;
1953
1954         ret->tlsext_status_cb = 0;
1955         ret->tlsext_status_arg = NULL;
1956
1957 # ifndef OPENSSL_NO_NEXTPROTONEG
1958         ret->next_protos_advertised_cb = 0;
1959         ret->next_proto_select_cb = 0;
1960 # endif
1961 #endif
1962 #ifndef OPENSSL_NO_PSK
1963         ret->psk_identity_hint=NULL;
1964         ret->psk_client_callback=NULL;
1965         ret->psk_server_callback=NULL;
1966 #endif
1967 #ifndef OPENSSL_NO_SRP
1968         SSL_CTX_SRP_CTX_init(ret);
1969 #endif
1970         ret->custom_cli_ext_records = NULL;
1971         ret->custom_cli_ext_records_count = 0;
1972         ret->custom_srv_ext_records = NULL;
1973         ret->custom_srv_ext_records_count = 0;
1974 #ifndef OPENSSL_NO_BUF_FREELISTS
1975         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1976         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1977         if (!ret->rbuf_freelist)
1978                 goto err;
1979         ret->rbuf_freelist->chunklen = 0;
1980         ret->rbuf_freelist->len = 0;
1981         ret->rbuf_freelist->head = NULL;
1982         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1983         if (!ret->wbuf_freelist)
1984                 {
1985                 OPENSSL_free(ret->rbuf_freelist);
1986                 goto err;
1987                 }
1988         ret->wbuf_freelist->chunklen = 0;
1989         ret->wbuf_freelist->len = 0;
1990         ret->wbuf_freelist->head = NULL;
1991 #endif
1992 #ifndef OPENSSL_NO_ENGINE
1993         ret->client_cert_engine = NULL;
1994 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1995 #define eng_strx(x)     #x
1996 #define eng_str(x)      eng_strx(x)
1997         /* Use specific client engine automatically... ignore errors */
1998         {
1999         ENGINE *eng;
2000         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2001         if (!eng)
2002                 {
2003                 ERR_clear_error();
2004                 ENGINE_load_builtin_engines();
2005                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2006                 }
2007         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2008                 ERR_clear_error();
2009         }
2010 #endif
2011 #endif
2012         /* Default is to connect to non-RI servers. When RI is more widely
2013          * deployed might change this.
2014          */
2015         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2016
2017         return(ret);
2018 err:
2019         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2020 err2:
2021         if (ret != NULL) SSL_CTX_free(ret);
2022         return(NULL);
2023         }
2024
2025 #if 0
2026 static void SSL_COMP_free(SSL_COMP *comp)
2027     { OPENSSL_free(comp); }
2028 #endif
2029
2030 #ifndef OPENSSL_NO_BUF_FREELISTS
2031 static void
2032 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2033         {
2034         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2035         for (ent = list->head; ent; ent = next)
2036                 {
2037                 next = ent->next;
2038                 OPENSSL_free(ent);
2039                 }
2040         OPENSSL_free(list);
2041         }
2042 #endif
2043
2044 void SSL_CTX_free(SSL_CTX *a)
2045         {
2046         int i;
2047
2048         if (a == NULL) return;
2049
2050         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2051 #ifdef REF_PRINT
2052         REF_PRINT("SSL_CTX",a);
2053 #endif
2054         if (i > 0) return;
2055 #ifdef REF_CHECK
2056         if (i < 0)
2057                 {
2058                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2059                 abort(); /* ok */
2060                 }
2061 #endif
2062
2063         if (a->param)
2064                 X509_VERIFY_PARAM_free(a->param);
2065
2066         /*
2067          * Free internal session cache. However: the remove_cb() may reference
2068          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2069          * after the sessions were flushed.
2070          * As the ex_data handling routines might also touch the session cache,
2071          * the most secure solution seems to be: empty (flush) the cache, then
2072          * free ex_data, then finally free the cache.
2073          * (See ticket [openssl.org #212].)
2074          */
2075         if (a->sessions != NULL)
2076                 SSL_CTX_flush_sessions(a,0);
2077
2078         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2079
2080         if (a->sessions != NULL)
2081                 lh_SSL_SESSION_free(a->sessions);
2082
2083         if (a->cert_store != NULL)
2084                 X509_STORE_free(a->cert_store);
2085         if (a->cipher_list != NULL)
2086                 sk_SSL_CIPHER_free(a->cipher_list);
2087         if (a->cipher_list_by_id != NULL)
2088                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2089         if (a->cert != NULL)
2090                 ssl_cert_free(a->cert);
2091         if (a->client_CA != NULL)
2092                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2093         if (a->extra_certs != NULL)
2094                 sk_X509_pop_free(a->extra_certs,X509_free);
2095 #if 0 /* This should never be done, since it removes a global database */
2096         if (a->comp_methods != NULL)
2097                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2098 #else
2099         a->comp_methods = NULL;
2100 #endif
2101
2102         if (a->srtp_profiles)
2103                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2104
2105 #ifndef OPENSSL_NO_PSK
2106         if (a->psk_identity_hint)
2107                 OPENSSL_free(a->psk_identity_hint);
2108 #endif
2109 #ifndef OPENSSL_NO_SRP
2110         SSL_CTX_SRP_CTX_free(a);
2111 #endif
2112 #ifndef OPENSSL_NO_TLSEXT
2113         OPENSSL_free(a->custom_cli_ext_records);
2114         OPENSSL_free(a->custom_srv_ext_records);
2115 #endif
2116 #ifndef OPENSSL_NO_ENGINE
2117         if (a->client_cert_engine)
2118                 ENGINE_finish(a->client_cert_engine);
2119 #endif
2120
2121 #ifndef OPENSSL_NO_BUF_FREELISTS
2122         if (a->wbuf_freelist)
2123                 ssl_buf_freelist_free(a->wbuf_freelist);
2124         if (a->rbuf_freelist)
2125                 ssl_buf_freelist_free(a->rbuf_freelist);
2126 #endif
2127 #ifndef OPENSSL_NO_TLSEXT
2128 # ifndef OPENSSL_NO_EC
2129         if (a->tlsext_ecpointformatlist)
2130                 OPENSSL_free(a->tlsext_ecpointformatlist);
2131         if (a->tlsext_ellipticcurvelist)
2132                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2133 # endif /* OPENSSL_NO_EC */
2134 #endif
2135
2136         OPENSSL_free(a);
2137         }
2138
2139 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2140         {
2141         ctx->default_passwd_callback=cb;
2142         }
2143
2144 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2145         {
2146         ctx->default_passwd_callback_userdata=u;
2147         }
2148
2149 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2150         {
2151         ctx->app_verify_callback=cb;
2152         ctx->app_verify_arg=arg;
2153         }
2154
2155 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2156         {
2157         ctx->verify_mode=mode;
2158         ctx->default_verify_callback=cb;
2159         }
2160
2161 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2162         {
2163         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2164         }
2165
2166 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2167         {
2168         ssl_cert_set_cert_cb(c->cert, cb, arg);
2169         }
2170
2171 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2172         {
2173         ssl_cert_set_cert_cb(s->cert, cb, arg);
2174         }
2175
2176 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2177         {
2178         CERT_PKEY *cpk;
2179         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2180         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2181         int rsa_tmp_export,dh_tmp_export,kl;
2182         unsigned long mask_k,mask_a,emask_k,emask_a;
2183 #ifndef OPENSSL_NO_ECDSA
2184         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2185 #endif
2186 #ifndef OPENSSL_NO_ECDH
2187         int have_ecdh_tmp, ecdh_ok;
2188 #endif
2189 #ifndef OPENSSL_NO_EC
2190         X509 *x = NULL;
2191         EVP_PKEY *ecc_pkey = NULL;
2192         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2193 #endif
2194         if (c == NULL) return;
2195
2196         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2197
2198 #ifndef OPENSSL_NO_RSA
2199         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2200         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2201                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2202 #else
2203         rsa_tmp=rsa_tmp_export=0;
2204 #endif
2205 #ifndef OPENSSL_NO_DH
2206         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2207         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2208                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2209 #else
2210         dh_tmp=dh_tmp_export=0;
2211 #endif
2212
2213 #ifndef OPENSSL_NO_ECDH
2214         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2215 #endif
2216         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2217         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2218         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2219         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2220         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2221         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2222         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2223         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2224         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2225         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2226         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2227 /* FIX THIS EAY EAY EAY */
2228         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2229         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2230         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2231 #ifndef OPENSSL_NO_EC
2232         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2233 #endif
2234         mask_k=0;
2235         mask_a=0;
2236         emask_k=0;
2237         emask_a=0;
2238
2239
2240
2241 #ifdef CIPHER_DEBUG
2242         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2243                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2244                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2245 #endif
2246
2247         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2248         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2249                 mask_k |= SSL_kGOST;
2250                 mask_a |= SSL_aGOST01;
2251         }
2252         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2253         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2254                 mask_k |= SSL_kGOST;
2255                 mask_a |= SSL_aGOST94;
2256         }
2257
2258         if (rsa_enc || (rsa_tmp && rsa_sign))
2259                 mask_k|=SSL_kRSA;
2260         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2261                 emask_k|=SSL_kRSA;
2262
2263 #if 0
2264         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2265         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2266                 (rsa_enc || rsa_sign || dsa_sign))
2267                 mask_k|=SSL_kEDH;
2268         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2269                 (rsa_enc || rsa_sign || dsa_sign))
2270                 emask_k|=SSL_kEDH;
2271 #endif
2272
2273         if (dh_tmp_export)
2274                 emask_k|=SSL_kEDH;
2275
2276         if (dh_tmp)
2277                 mask_k|=SSL_kEDH;
2278
2279         if (dh_rsa) mask_k|=SSL_kDHr;
2280         if (dh_rsa_export) emask_k|=SSL_kDHr;
2281
2282         if (dh_dsa) mask_k|=SSL_kDHd;
2283         if (dh_dsa_export) emask_k|=SSL_kDHd;
2284
2285         if (emask_k & (SSL_kDHr|SSL_kDHd))
2286                 mask_a |= SSL_aDH;
2287
2288         if (rsa_enc || rsa_sign)
2289                 {
2290                 mask_a|=SSL_aRSA;
2291                 emask_a|=SSL_aRSA;
2292                 }
2293
2294         if (dsa_sign)
2295                 {
2296                 mask_a|=SSL_aDSS;
2297                 emask_a|=SSL_aDSS;
2298                 }
2299
2300         mask_a|=SSL_aNULL;
2301         emask_a|=SSL_aNULL;
2302
2303 #ifndef OPENSSL_NO_KRB5
2304         mask_k|=SSL_kKRB5;
2305         mask_a|=SSL_aKRB5;
2306         emask_k|=SSL_kKRB5;
2307         emask_a|=SSL_aKRB5;
2308 #endif
2309
2310         /* An ECC certificate may be usable for ECDH and/or
2311          * ECDSA cipher suites depending on the key usage extension.
2312          */
2313 #ifndef OPENSSL_NO_EC
2314         if (have_ecc_cert)
2315                 {
2316                 cpk = &c->pkeys[SSL_PKEY_ECC];
2317                 x = cpk->x509;
2318                 /* This call populates extension flags (ex_flags) */
2319                 X509_check_purpose(x, -1, 0);
2320                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2321                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2322                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2323                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2324                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2325                         ecdsa_ok = 0;
2326                 ecc_pkey = X509_get_pubkey(x);
2327                 ecc_pkey_size = (ecc_pkey != NULL) ?
2328                     EVP_PKEY_bits(ecc_pkey) : 0;
2329                 EVP_PKEY_free(ecc_pkey);
2330                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2331                         {
2332                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2333                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2334                         }
2335 #ifndef OPENSSL_NO_ECDH
2336                 if (ecdh_ok)
2337                         {
2338
2339                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2340                                 {
2341                                 mask_k|=SSL_kECDHr;
2342                                 mask_a|=SSL_aECDH;
2343                                 if (ecc_pkey_size <= 163)
2344                                         {
2345                                         emask_k|=SSL_kECDHr;
2346                                         emask_a|=SSL_aECDH;
2347                                         }
2348                                 }
2349
2350                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2351                                 {
2352                                 mask_k|=SSL_kECDHe;
2353                                 mask_a|=SSL_aECDH;
2354                                 if (ecc_pkey_size <= 163)
2355                                         {
2356                                         emask_k|=SSL_kECDHe;
2357                                         emask_a|=SSL_aECDH;
2358                                         }
2359                                 }
2360                         }
2361 #endif
2362 #ifndef OPENSSL_NO_ECDSA
2363                 if (ecdsa_ok)
2364                         {
2365                         mask_a|=SSL_aECDSA;
2366                         emask_a|=SSL_aECDSA;
2367                         }
2368 #endif
2369                 }
2370 #endif
2371
2372 #ifndef OPENSSL_NO_ECDH
2373         if (have_ecdh_tmp)
2374                 {
2375                 mask_k|=SSL_kEECDH;
2376                 emask_k|=SSL_kEECDH;
2377                 }
2378 #endif
2379
2380 #ifndef OPENSSL_NO_PSK
2381         mask_k |= SSL_kPSK;
2382         mask_a |= SSL_aPSK;
2383         emask_k |= SSL_kPSK;
2384         emask_a |= SSL_aPSK;
2385 #endif
2386
2387         c->mask_k=mask_k;
2388         c->mask_a=mask_a;
2389         c->export_mask_k=emask_k;
2390         c->export_mask_a=emask_a;
2391         c->valid=1;
2392         }
2393
2394 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2395 #define ku_reject(x, usage) \
2396         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2397
2398 #ifndef OPENSSL_NO_EC
2399
2400 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2401         {
2402         unsigned long alg_k, alg_a;
2403         EVP_PKEY *pkey = NULL;
2404         int keysize = 0;
2405         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2406         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2407
2408         alg_k = cs->algorithm_mkey;
2409         alg_a = cs->algorithm_auth;
2410
2411         if (SSL_C_IS_EXPORT(cs))
2412                 {
2413                 /* ECDH key length in export ciphers must be <= 163 bits */
2414                 pkey = X509_get_pubkey(x);
2415                 if (pkey == NULL) return 0;
2416                 keysize = EVP_PKEY_bits(pkey);
2417                 EVP_PKEY_free(pkey);
2418                 if (keysize > 163) return 0;
2419                 }
2420
2421         /* This call populates the ex_flags field correctly */
2422         X509_check_purpose(x, -1, 0);
2423         if ((x->sig_alg) && (x->sig_alg->algorithm))
2424                 {
2425                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2426                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2427                 }
2428         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2429                 {
2430                 /* key usage, if present, must allow key agreement */
2431                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2432                         {
2433                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2434                         return 0;
2435                         }
2436                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2437                         {
2438                         /* signature alg must be ECDSA */
2439                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2440                                 {
2441                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2442                                 return 0;
2443                                 }
2444                         }
2445                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2446                         {
2447                         /* signature alg must be RSA */
2448
2449                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2450                                 {
2451                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2452                                 return 0;
2453                                 }
2454                         }
2455                 }
2456         if (alg_a & SSL_aECDSA)
2457                 {
2458                 /* key usage, if present, must allow signing */
2459                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2460                         {
2461                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2462                         return 0;
2463                         }
2464                 }
2465
2466         return 1;  /* all checks are ok */
2467         }
2468
2469 #endif
2470
2471 static int ssl_get_server_cert_index(const SSL *s)
2472         {
2473         int idx;
2474         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2475         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2476                 idx = SSL_PKEY_RSA_SIGN;
2477         if (idx == -1)
2478                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2479         return idx;
2480         }
2481
2482 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2483         {
2484         CERT *c;
2485         int i;
2486
2487         c = s->cert;
2488         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2489
2490 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2491         /* Broken protocol test: return last used certificate: which may
2492          * mismatch the one expected.
2493          */
2494         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2495                 return c->key;
2496 #endif
2497
2498         i = ssl_get_server_cert_index(s);
2499
2500         /* This may or may not be an error. */
2501         if (i < 0)
2502                 return NULL;
2503
2504         /* May be NULL. */
2505         return &c->pkeys[i];
2506         }
2507
2508 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2509         {
2510         unsigned long alg_a;
2511         CERT *c;
2512         int idx = -1;
2513
2514         alg_a = cipher->algorithm_auth;
2515         c=s->cert;
2516
2517 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2518         /* Broken protocol test: use last key: which may
2519          * mismatch the one expected.
2520          */
2521         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2522                 idx = c->key - c->pkeys;
2523         else
2524 #endif
2525
2526         if ((alg_a & SSL_aDSS) &&
2527                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2528                 idx = SSL_PKEY_DSA_SIGN;
2529         else if (alg_a & SSL_aRSA)
2530                 {
2531                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2532                         idx = SSL_PKEY_RSA_SIGN;
2533                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2534                         idx = SSL_PKEY_RSA_ENC;
2535                 }
2536         else if ((alg_a & SSL_aECDSA) &&
2537                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2538                 idx = SSL_PKEY_ECC;
2539         if (idx == -1)
2540                 {
2541                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2542                 return(NULL);
2543                 }
2544         if (pmd)
2545                 *pmd = c->pkeys[idx].digest;
2546         return c->pkeys[idx].privatekey;
2547         }
2548
2549 #ifndef OPENSSL_NO_TLSEXT
2550 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2551         {
2552         CERT *c;
2553         int i;
2554
2555         c = s->cert;
2556         i = ssl_get_server_cert_index(s);
2557
2558         if (i == -1)
2559                 return NULL;
2560
2561         *authz_length = 0;
2562         if (c->pkeys[i].authz == NULL)
2563                 return(NULL);
2564         *authz_length = c->pkeys[i].authz_length;
2565
2566         return c->pkeys[i].authz;
2567         }
2568
2569 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2570                                    size_t *serverinfo_length)
2571         {
2572         CERT *c = NULL;
2573         int i = 0;
2574         *serverinfo_length = 0;
2575
2576         c = s->cert;
2577         i = ssl_get_server_cert_index(s);
2578
2579         if (i == -1)
2580                 return 0;
2581         if (c->pkeys[i].serverinfo == NULL)
2582                 return 0;
2583
2584         *serverinfo = c->pkeys[i].serverinfo;
2585         *serverinfo_length = c->pkeys[i].serverinfo_length;
2586         return 1;
2587         }
2588 #endif
2589
2590 void ssl_update_cache(SSL *s,int mode)
2591         {
2592         int i;
2593
2594         /* If the session_id_length is 0, we are not supposed to cache it,
2595          * and it would be rather hard to do anyway :-) */
2596         if (s->session->session_id_length == 0) return;
2597
2598         i=s->session_ctx->session_cache_mode;
2599         if ((i & mode) && (!s->hit)
2600                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2601                     || SSL_CTX_add_session(s->session_ctx,s->session))
2602                 && (s->session_ctx->new_session_cb != NULL))
2603                 {
2604                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2605                 if (!s->session_ctx->new_session_cb(s,s->session))
2606                         SSL_SESSION_free(s->session);
2607                 }
2608
2609         /* auto flush every 255 connections */
2610         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2611                 ((i & mode) == mode))
2612                 {
2613                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2614                         ?s->session_ctx->stats.sess_connect_good
2615                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2616                         {
2617                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2618                         }
2619                 }
2620         }
2621
2622 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2623         {
2624         return(s->method);
2625         }
2626
2627 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2628         {
2629         int conn= -1;
2630         int ret=1;
2631
2632         if (s->method != meth)
2633                 {
2634                 if (s->handshake_func != NULL)
2635                         conn=(s->handshake_func == s->method->ssl_connect);
2636
2637                 if (s->method->version == meth->version)
2638                         s->method=meth;
2639                 else
2640                         {
2641                         s->method->ssl_free(s);
2642                         s->method=meth;
2643                         ret=s->method->ssl_new(s);
2644                         }
2645
2646                 if (conn == 1)
2647                         s->handshake_func=meth->ssl_connect;
2648                 else if (conn == 0)
2649                         s->handshake_func=meth->ssl_accept;
2650                 }
2651         return(ret);
2652         }
2653
2654 int SSL_get_error(const SSL *s,int i)
2655         {
2656         int reason;
2657         unsigned long l;
2658         BIO *bio;
2659
2660         if (i > 0) return(SSL_ERROR_NONE);
2661
2662         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2663          * etc, where we do encode the error */
2664         if ((l=ERR_peek_error()) != 0)
2665                 {
2666                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2667                         return(SSL_ERROR_SYSCALL);
2668                 else
2669                         return(SSL_ERROR_SSL);
2670                 }
2671
2672         if ((i < 0) && SSL_want_read(s))
2673                 {
2674                 bio=SSL_get_rbio(s);
2675                 if (BIO_should_read(bio))
2676                         return(SSL_ERROR_WANT_READ);
2677                 else if (BIO_should_write(bio))
2678                         /* This one doesn't make too much sense ... We never try
2679                          * to write to the rbio, and an application program where
2680                          * rbio and wbio are separate couldn't even know what it
2681                          * should wait for.
2682                          * However if we ever set s->rwstate incorrectly
2683                          * (so that we have SSL_want_read(s) instead of
2684                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2685                          * this test works around that bug; so it might be safer
2686                          * to keep it. */
2687                         return(SSL_ERROR_WANT_WRITE);
2688                 else if (BIO_should_io_special(bio))
2689                         {
2690                         reason=BIO_get_retry_reason(bio);
2691                         if (reason == BIO_RR_CONNECT)
2692                                 return(SSL_ERROR_WANT_CONNECT);
2693                         else if (reason == BIO_RR_ACCEPT)
2694                                 return(SSL_ERROR_WANT_ACCEPT);
2695                         else
2696                                 return(SSL_ERROR_SYSCALL); /* unknown */
2697                         }
2698                 }
2699
2700         if ((i < 0) && SSL_want_write(s))
2701                 {
2702                 bio=SSL_get_wbio(s);
2703                 if (BIO_should_write(bio))
2704                         return(SSL_ERROR_WANT_WRITE);
2705                 else if (BIO_should_read(bio))
2706                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2707                         return(SSL_ERROR_WANT_READ);
2708                 else if (BIO_should_io_special(bio))
2709                         {
2710                         reason=BIO_get_retry_reason(bio);
2711                         if (reason == BIO_RR_CONNECT)
2712                                 return(SSL_ERROR_WANT_CONNECT);
2713                         else if (reason == BIO_RR_ACCEPT)
2714                                 return(SSL_ERROR_WANT_ACCEPT);
2715                         else
2716                                 return(SSL_ERROR_SYSCALL);
2717                         }
2718                 }
2719         if ((i < 0) && SSL_want_x509_lookup(s))
2720                 {
2721                 return(SSL_ERROR_WANT_X509_LOOKUP);
2722                 }
2723
2724         if (i == 0)
2725                 {
2726                 if (s->version == SSL2_VERSION)
2727                         {
2728                         /* assume it is the socket being closed */
2729                         return(SSL_ERROR_ZERO_RETURN);
2730                         }
2731                 else
2732                         {
2733                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2734                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2735                                 return(SSL_ERROR_ZERO_RETURN);
2736                         }
2737                 }
2738         return(SSL_ERROR_SYSCALL);
2739         }
2740
2741 int SSL_do_handshake(SSL *s)
2742         {
2743         int ret=1;
2744
2745         if (s->handshake_func == NULL)
2746                 {
2747                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2748                 return(-1);
2749                 }
2750
2751         s->method->ssl_renegotiate_check(s);
2752
2753         if (SSL_in_init(s) || SSL_in_before(s))
2754                 {
2755                 ret=s->handshake_func(s);
2756                 }
2757         return(ret);
2758         }
2759
2760 /* For the next 2 functions, SSL_clear() sets shutdown and so
2761  * one of these calls will reset it */
2762 void SSL_set_accept_state(SSL *s)
2763         {
2764         s->server=1;
2765         s->shutdown=0;
2766         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2767         s->handshake_func=s->method->ssl_accept;
2768         /* clear the current cipher */
2769         ssl_clear_cipher_ctx(s);
2770         ssl_clear_hash_ctx(&s->read_hash);
2771         ssl_clear_hash_ctx(&s->write_hash);
2772         }
2773
2774 void SSL_set_connect_state(SSL *s)
2775         {
2776         s->server=0;
2777         s->shutdown=0;
2778         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2779         s->handshake_func=s->method->ssl_connect;
2780         /* clear the current cipher */
2781         ssl_clear_cipher_ctx(s);
2782         ssl_clear_hash_ctx(&s->read_hash);
2783         ssl_clear_hash_ctx(&s->write_hash);
2784         }
2785
2786 int ssl_undefined_function(SSL *s)
2787         {
2788         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2789         return(0);
2790         }
2791
2792 int ssl_undefined_void_function(void)
2793         {
2794         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2795         return(0);
2796         }
2797
2798 int ssl_undefined_const_function(const SSL *s)
2799         {
2800         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2801         return(0);
2802         }
2803
2804 SSL_METHOD *ssl_bad_method(int ver)
2805         {
2806         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2807         return(NULL);
2808         }
2809
2810 const char *SSL_get_version(const SSL *s)
2811         {
2812         if (s->version == TLS1_2_VERSION)
2813                 return("TLSv1.2");
2814         else if (s->version == TLS1_1_VERSION)
2815                 return("TLSv1.1");
2816         else if (s->version == TLS1_VERSION)
2817                 return("TLSv1");
2818         else if (s->version == SSL3_VERSION)
2819                 return("SSLv3");
2820         else if (s->version == SSL2_VERSION)
2821                 return("SSLv2");
2822         else
2823                 return("unknown");
2824         }
2825
2826 SSL *SSL_dup(SSL *s)
2827         {
2828         STACK_OF(X509_NAME) *sk;
2829         X509_NAME *xn;
2830         SSL *ret;
2831         int i;
2832
2833         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2834             return(NULL);
2835
2836         ret->version = s->version;
2837         ret->type = s->type;
2838         ret->method = s->method;
2839
2840         if (s->session != NULL)
2841                 {
2842                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2843                 SSL_copy_session_id(ret,s);
2844                 }
2845         else
2846                 {
2847                 /* No session has been established yet, so we have to expect
2848                  * that s->cert or ret->cert will be changed later --
2849                  * they should not both point to the same object,
2850                  * and thus we can't use SSL_copy_session_id. */
2851
2852                 ret->method->ssl_free(ret);
2853                 ret->method = s->method;
2854                 ret->method->ssl_new(ret);
2855
2856                 if (s->cert != NULL)
2857                         {
2858                         if (ret->cert != NULL)
2859                                 {
2860                                 ssl_cert_free(ret->cert);
2861                                 }
2862                         ret->cert = ssl_cert_dup(s->cert);
2863                         if (ret->cert == NULL)
2864                                 goto err;
2865                         }
2866
2867                 SSL_set_session_id_context(ret,
2868                         s->sid_ctx, s->sid_ctx_length);
2869                 }
2870
2871         ret->options=s->options;
2872         ret->mode=s->mode;
2873         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2874         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2875         ret->msg_callback = s->msg_callback;
2876         ret->msg_callback_arg = s->msg_callback_arg;
2877         SSL_set_verify(ret,SSL_get_verify_mode(s),
2878                 SSL_get_verify_callback(s));
2879         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2880         ret->generate_session_id = s->generate_session_id;
2881
2882         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2883
2884         ret->debug=s->debug;
2885
2886         /* copy app data, a little dangerous perhaps */
2887         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2888                 goto err;
2889
2890         /* setup rbio, and wbio */
2891         if (s->rbio != NULL)
2892                 {
2893                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2894                         goto err;
2895                 }
2896         if (s->wbio != NULL)
2897                 {
2898                 if (s->wbio != s->rbio)
2899                         {
2900                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2901                                 goto err;
2902                         }
2903                 else
2904                         ret->wbio=ret->rbio;
2905                 }
2906         ret->rwstate = s->rwstate;
2907         ret->in_handshake = s->in_handshake;
2908         ret->handshake_func = s->handshake_func;
2909         ret->server = s->server;
2910         ret->renegotiate = s->renegotiate;
2911         ret->new_session = s->new_session;
2912         ret->quiet_shutdown = s->quiet_shutdown;
2913         ret->shutdown=s->shutdown;
2914         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2915         ret->rstate=s->rstate;
2916         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2917         ret->hit=s->hit;
2918
2919         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2920
2921         /* dup the cipher_list and cipher_list_by_id stacks */
2922         if (s->cipher_list != NULL)
2923                 {
2924                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2925                         goto err;
2926                 }
2927         if (s->cipher_list_by_id != NULL)
2928                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2929                         == NULL)
2930                         goto err;
2931
2932         /* Dup the client_CA list */
2933         if (s->client_CA != NULL)
2934                 {
2935                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2936                 ret->client_CA=sk;
2937                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2938                         {
2939                         xn=sk_X509_NAME_value(sk,i);
2940                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2941                                 {
2942                                 X509_NAME_free(xn);
2943                                 goto err;
2944                                 }
2945                         }
2946                 }
2947
2948         if (0)
2949                 {
2950 err:
2951                 if (ret != NULL) SSL_free(ret);
2952                 ret=NULL;
2953                 }
2954         return(ret);
2955         }
2956
2957 void ssl_clear_cipher_ctx(SSL *s)
2958         {
2959         if (s->enc_read_ctx != NULL)
2960                 {
2961                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2962                 OPENSSL_free(s->enc_read_ctx);
2963                 s->enc_read_ctx=NULL;
2964                 }
2965         if (s->enc_write_ctx != NULL)
2966                 {
2967                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2968                 OPENSSL_free(s->enc_write_ctx);
2969                 s->enc_write_ctx=NULL;
2970                 }
2971 #ifndef OPENSSL_NO_COMP
2972         if (s->expand != NULL)
2973                 {
2974                 COMP_CTX_free(s->expand);
2975                 s->expand=NULL;
2976                 }
2977         if (s->compress != NULL)
2978                 {
2979                 COMP_CTX_free(s->compress);
2980                 s->compress=NULL;
2981                 }
2982 #endif
2983         }
2984
2985 /* Fix this function so that it takes an optional type parameter */
2986 X509 *SSL_get_certificate(const SSL *s)
2987         {
2988         if (s->cert != NULL)
2989                 return(s->cert->key->x509);
2990         else
2991                 return(NULL);
2992         }
2993
2994 /* Fix this function so that it takes an optional type parameter */
2995 EVP_PKEY *SSL_get_privatekey(SSL *s)
2996         {
2997         if (s->cert != NULL)
2998                 return(s->cert->key->privatekey);
2999         else
3000                 return(NULL);
3001         }
3002
3003 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3004         {
3005         if ((s->session != NULL) && (s->session->cipher != NULL))
3006                 return(s->session->cipher);
3007         return(NULL);
3008         }
3009 #ifdef OPENSSL_NO_COMP
3010 const void *SSL_get_current_compression(SSL *s)
3011         {
3012         return NULL;
3013         }
3014 const void *SSL_get_current_expansion(SSL *s)
3015         {
3016         return NULL;
3017         }
3018 #else
3019
3020 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3021         {
3022         if (s->compress != NULL)
3023                 return(s->compress->meth);
3024         return(NULL);
3025         }
3026
3027 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3028         {
3029         if (s->expand != NULL)
3030                 return(s->expand->meth);
3031         return(NULL);
3032         }
3033 #endif
3034
3035 int ssl_init_wbio_buffer(SSL *s,int push)
3036         {
3037         BIO *bbio;
3038
3039         if (s->bbio == NULL)
3040                 {
3041                 bbio=BIO_new(BIO_f_buffer());
3042                 if (bbio == NULL) return(0);
3043                 s->bbio=bbio;
3044                 }
3045         else
3046                 {
3047                 bbio=s->bbio;
3048                 if (s->bbio == s->wbio)
3049                         s->wbio=BIO_pop(s->wbio);
3050                 }
3051         (void)BIO_reset(bbio);
3052 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3053         if (!BIO_set_read_buffer_size(bbio,1))
3054                 {
3055                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3056                 return(0);
3057                 }
3058         if (push)
3059                 {
3060                 if (s->wbio != bbio)
3061                         s->wbio=BIO_push(bbio,s->wbio);
3062                 }
3063         else
3064                 {
3065                 if (s->wbio == bbio)
3066                         s->wbio=BIO_pop(bbio);
3067                 }
3068         return(1);
3069         }
3070
3071 void ssl_free_wbio_buffer(SSL *s)
3072         {
3073         if (s->bbio == NULL) return;
3074
3075         if (s->bbio == s->wbio)
3076                 {
3077                 /* remove buffering */
3078                 s->wbio=BIO_pop(s->wbio);
3079 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3080                 assert(s->wbio != NULL);
3081 #endif
3082         }
3083         BIO_free(s->bbio);
3084         s->bbio=NULL;
3085         }
3086
3087 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3088         {
3089         ctx->quiet_shutdown=mode;
3090         }
3091
3092 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3093         {
3094         return(ctx->quiet_shutdown);
3095         }
3096
3097 void SSL_set_quiet_shutdown(SSL *s,int mode)
3098         {
3099         s->quiet_shutdown=mode;
3100         }
3101
3102 int SSL_get_quiet_shutdown(const SSL *s)
3103         {
3104         return(s->quiet_shutdown);
3105         }
3106
3107 void SSL_set_shutdown(SSL *s,int mode)
3108         {
3109         s->shutdown=mode;
3110         }
3111
3112 int SSL_get_shutdown(const SSL *s)
3113         {
3114         return(s->shutdown);
3115         }
3116
3117 int SSL_version(const SSL *s)
3118         {
3119         return(s->version);
3120         }
3121
3122 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3123         {
3124         return(ssl->ctx);
3125         }
3126
3127 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3128         {
3129         if (ssl->ctx == ctx)
3130                 return ssl->ctx;
3131 #ifndef OPENSSL_NO_TLSEXT
3132         if (ctx == NULL)
3133                 ctx = ssl->initial_ctx;
3134 #endif
3135         if (ssl->cert != NULL)
3136                 ssl_cert_free(ssl->cert);
3137         ssl->cert = ssl_cert_dup(ctx->cert);
3138         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3139         if (ssl->ctx != NULL)
3140                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3141         ssl->ctx = ctx;
3142         return(ssl->ctx);
3143         }
3144
3145 #ifndef OPENSSL_NO_STDIO
3146 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3147         {
3148         return(X509_STORE_set_default_paths(ctx->cert_store));
3149         }
3150
3151 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3152                 const char *CApath)
3153         {
3154         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3155         }
3156 #endif
3157
3158 void SSL_set_info_callback(SSL *ssl,
3159         void (*cb)(const SSL *ssl,int type,int val))
3160         {
3161         ssl->info_callback=cb;
3162         }
3163
3164 /* One compiler (Diab DCC) doesn't like argument names in returned
3165    function pointer.  */
3166 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3167         {
3168         return ssl->info_callback;
3169         }
3170
3171 int SSL_state(const SSL *ssl)
3172         {
3173         return(ssl->state);
3174         }
3175
3176 void SSL_set_state(SSL *ssl, int state)
3177         {
3178         ssl->state = state;
3179         }
3180
3181 void SSL_set_verify_result(SSL *ssl,long arg)
3182         {
3183         ssl->verify_result=arg;
3184         }
3185
3186 long SSL_get_verify_result(const SSL *ssl)
3187         {
3188         return(ssl->verify_result);
3189         }
3190
3191 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3192                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3193         {
3194         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3195                                 new_func, dup_func, free_func);
3196         }
3197
3198 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3199         {
3200         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3201         }
3202
3203 void *SSL_get_ex_data(const SSL *s,int idx)
3204         {
3205         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3206         }
3207
3208 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3209                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3210         {
3211         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3212                                 new_func, dup_func, free_func);
3213         }
3214
3215 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3216         {
3217         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3218         }
3219
3220 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3221         {
3222         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3223         }
3224
3225 int ssl_ok(SSL *s)
3226         {
3227         return(1);
3228         }
3229
3230 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3231         {
3232         return(ctx->cert_store);
3233         }
3234
3235 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3236         {
3237         if (ctx->cert_store != NULL)
3238                 X509_STORE_free(ctx->cert_store);
3239         ctx->cert_store=store;
3240         }
3241
3242 int SSL_want(const SSL *s)
3243         {
3244         return(s->rwstate);
3245         }
3246
3247 /*!
3248  * \brief Set the callback for generating temporary RSA keys.
3249  * \param ctx the SSL context.
3250  * \param cb the callback
3251  */
3252
3253 #ifndef OPENSSL_NO_RSA
3254 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3255                                                           int is_export,
3256                                                           int keylength))
3257     {
3258     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3259     }
3260
3261 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3262                                                   int is_export,
3263                                                   int keylength))
3264     {
3265     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3266     }
3267 #endif
3268
3269 #ifdef DOXYGEN
3270 /*!
3271  * \brief The RSA temporary key callback function.
3272  * \param ssl the SSL session.
3273  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3274  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3275  * of the required key in bits.
3276  * \return the temporary RSA key.
3277  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3278  */
3279
3280 RSA *cb(SSL *ssl,int is_export,int keylength)
3281     {}
3282 #endif
3283
3284 /*!
3285  * \brief Set the callback for generating temporary DH keys.
3286  * \param ctx the SSL context.
3287  * \param dh the callback
3288  */
3289
3290 #ifndef OPENSSL_NO_DH
3291 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3292                                                         int keylength))
3293         {
3294         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3295         }
3296
3297 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3298                                                 int keylength))
3299         {
3300         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3301         }
3302 #endif
3303
3304 #ifndef OPENSSL_NO_ECDH
3305 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3306                                                                 int keylength))
3307         {
3308         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3309         }
3310
3311 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3312                                                         int keylength))
3313         {
3314         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3315         }
3316 #endif
3317
3318 #ifndef OPENSSL_NO_PSK
3319 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3320         {
3321         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3322                 {
3323                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3324                 return 0;
3325                 }
3326         if (ctx->psk_identity_hint != NULL)
3327                 OPENSSL_free(ctx->psk_identity_hint);
3328         if (identity_hint != NULL)
3329                 {
3330                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3331                 if (ctx->psk_identity_hint == NULL)
3332                         return 0;
3333                 }
3334         else
3335                 ctx->psk_identity_hint = NULL;
3336         return 1;
3337         }
3338
3339 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3340         {
3341         if (s == NULL)
3342                 return 0;
3343
3344         if (s->session == NULL)
3345                 return 1; /* session not created yet, ignored */
3346
3347         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3348                 {
3349                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3350                 return 0;
3351                 }
3352         if (s->session->psk_identity_hint != NULL)
3353                 OPENSSL_free(s->session->psk_identity_hint);
3354         if (identity_hint != NULL)
3355                 {
3356                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3357                 if (s->session->psk_identity_hint == NULL)
3358                         return 0;
3359                 }
3360         else
3361                 s->session->psk_identity_hint = NULL;
3362         return 1;
3363         }
3364
3365 const char *SSL_get_psk_identity_hint(const SSL *s)
3366         {
3367         if (s == NULL || s->session == NULL)
3368                 return NULL;
3369         return(s->session->psk_identity_hint);
3370         }
3371
3372 const char *SSL_get_psk_identity(const SSL *s)
3373         {
3374         if (s == NULL || s->session == NULL)
3375                 return NULL;
3376         return(s->session->psk_identity);
3377         }
3378
3379 void SSL_set_psk_client_callback(SSL *s,
3380     unsigned int (*cb)(SSL *ssl, const char *hint,
3381                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3382                        unsigned int max_psk_len))
3383         {
3384         s->psk_client_callback = cb;
3385         }
3386
3387 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3388     unsigned int (*cb)(SSL *ssl, const char *hint,
3389                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3390                        unsigned int max_psk_len))
3391         {
3392         ctx->psk_client_callback = cb;
3393         }
3394
3395 void SSL_set_psk_server_callback(SSL *s,
3396     unsigned int (*cb)(SSL *ssl, const char *identity,
3397                        unsigned char *psk, unsigned int max_psk_len))
3398         {
3399         s->psk_server_callback = cb;
3400         }
3401
3402 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3403     unsigned int (*cb)(SSL *ssl, const char *identity,
3404                        unsigned char *psk, unsigned int max_psk_len))
3405         {
3406         ctx->psk_server_callback = cb;
3407         }
3408 #endif
3409
3410 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))
3411         {
3412         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3413         }
3414 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))
3415         {
3416         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3417         }
3418
3419 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3420  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3421  * any. If EVP_MD pointer is passed, initializes ctx with this md
3422  * Returns newly allocated ctx;
3423  */
3424
3425 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3426 {
3427         ssl_clear_hash_ctx(hash);
3428         *hash = EVP_MD_CTX_create();
3429         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3430         return *hash;
3431 }
3432 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3433 {
3434
3435         if (*hash) EVP_MD_CTX_destroy(*hash);
3436         *hash=NULL;
3437 }
3438
3439 void SSL_set_debug(SSL *s, int debug)
3440         {
3441         s->debug = debug;
3442         }
3443
3444 int SSL_cache_hit(SSL *s)
3445         {
3446         return s->hit;
3447         }
3448
3449 int SSL_is_server(SSL *s)
3450         {
3451         return s->server;
3452         }
3453
3454 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3455 #include "../crypto/bio/bss_file.c"
3456 #endif
3457
3458 IMPLEMENT_STACK_OF(SSL_CIPHER)
3459 IMPLEMENT_STACK_OF(SSL_COMP)
3460 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3461                                     ssl_cipher_id);