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
 160 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 161
 162 SSL3_ENC_METHOD ssl3_undef_enc_method={
 163         /* evil casts, but these functions are only called if there's a library bug */
 164         (int (*)(SSL *,int))ssl_undefined_function,
 165         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 166         ssl_undefined_function,
 167         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 168         (int (*)(SSL*, int))ssl_undefined_function,
 169         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 170         0,      /* finish_mac_length */
 171         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 172         NULL,   /* client_finished_label */
 173         0,      /* client_finished_label_len */
 174         NULL,   /* server_finished_label */
 175         0,      /* server_finished_label_len */
 176         (int (*)(int))ssl_undefined_function
 177         };
 178
 179 int SSL_clear(SSL *s)
 180         {
 181
 182         if (s->method == NULL)
 183                 {
 184                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 185                 return(0);
 186                 }
 187
 188         if (ssl_clear_bad_session(s))
 189                 {
 190                 SSL_SESSION_free(s->session);
 191                 s->session=NULL;
 192                 }
 193
 194         s->error=0;
 195         s->hit=0;
 196         s->shutdown=0;
 197
 198 #if 0 /* Disabled since version 1.10 of this file (early return not
 199        * needed because SSL_clear is not called when doing renegotiation) */
 200         /* This is set if we are doing dynamic renegotiation so keep
 201          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 202         if (s->new_session) return(1);
 203 #else
 204         if (s->new_session)
 205                 {
 206                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 207                 return 0;
 208                 }
 209 #endif
 210
 211         s->type=0;
 212
 213         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 214
 215         s->version=s->method->version;
 216         s->client_version=s->version;
 217         s->rwstate=SSL_NOTHING;
 218         s->rstate=SSL_ST_READ_HEADER;
 219 #if 0
 220         s->read_ahead=s->ctx->read_ahead;
 221 #endif
 222
 223         if (s->init_buf != NULL)
 224                 {
 225                 BUF_MEM_free(s->init_buf);
 226                 s->init_buf=NULL;
 227                 }
 228
 229         ssl_clear_cipher_ctx(s);
 230         ssl_clear_hash_ctx(&s->read_hash);
 231         ssl_clear_hash_ctx(&s->write_hash);
 232
 233         s->first_packet=0;
 234
 235 #if 1
 236         /* Check to see if we were changed into a different method, if
 237          * so, revert back if we are not doing session-id reuse. */
 238         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 239                 {
 240                 s->method->ssl_free(s);
 241                 s->method=s->ctx->method;
 242                 if (!s->method->ssl_new(s))
 243                         return(0);
 244                 }
 245         else
 246 #endif
 247                 s->method->ssl_clear(s);
 248         return(1);
 249         }
 250
 251 /** Used to change an SSL_CTXs default SSL method type */
 252 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 253         {
 254         STACK_OF(SSL_CIPHER) *sk;
 255
 256         ctx->method=meth;
 257
 258         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 259                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 260         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 261                 {
 262                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 263                 return(0);
 264                 }
 265         return(1);
 266         }
 267
 268 SSL *SSL_new(SSL_CTX *ctx)
 269         {
 270         SSL *s;
 271
 272         if (ctx == NULL)
 273                 {
 274                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 275                 return(NULL);
 276                 }
 277         if (ctx->method == NULL)
 278                 {
 279                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 280                 return(NULL);
 281                 }
 282
 283         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 284         if (s == NULL) goto err;
 285         memset(s,0,sizeof(SSL));
 286
 287 #ifndef OPENSSL_NO_KRB5
 288         s->kssl_ctx = kssl_ctx_new();
 289 #endif  /* OPENSSL_NO_KRB5 */
 290
 291         s->options=ctx->options;
 292         s->mode=ctx->mode;
 293         s->max_cert_list=ctx->max_cert_list;
 294
 295         if (ctx->cert != NULL)
 296                 {
 297                 /* Earlier library versions used to copy the pointer to
 298                  * the CERT, not its contents; only when setting new
 299                  * parameters for the per-SSL copy, ssl_cert_new would be
 300                  * called (and the direct reference to the per-SSL_CTX
 301                  * settings would be lost, but those still were indirectly
 302                  * accessed for various purposes, and for that reason they
 303                  * used to be known as s->ctx->default_cert).
 304                  * Now we don't look at the SSL_CTX's CERT after having
 305                  * duplicated it once. */
 306
 307                 s->cert = ssl_cert_dup(ctx->cert);
 308                 if (s->cert == NULL)
 309                         goto err;
 310                 }
 311         else
 312                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 313
 314         s->read_ahead=ctx->read_ahead;
 315         s->msg_callback=ctx->msg_callback;
 316         s->msg_callback_arg=ctx->msg_callback_arg;
 317         s->verify_mode=ctx->verify_mode;
 318 #if 0
 319         s->verify_depth=ctx->verify_depth;
 320 #endif
 321         s->sid_ctx_length=ctx->sid_ctx_length;
 322         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 323         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 324         s->verify_callback=ctx->default_verify_callback;
 325         s->generate_session_id=ctx->generate_session_id;
 326
 327         s->param = X509_VERIFY_PARAM_new();
 328         if (!s->param)
 329                 goto err;
 330         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 331 #if 0
 332         s->purpose = ctx->purpose;
 333         s->trust = ctx->trust;
 334 #endif
 335         s->quiet_shutdown=ctx->quiet_shutdown;
 336         s->max_send_fragment = ctx->max_send_fragment;
 337
 338         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 339         s->ctx=ctx;
 340 #ifndef OPENSSL_NO_TLSEXT
 341         s->tlsext_debug_cb = 0;
 342         s->tlsext_debug_arg = NULL;
 343         s->tlsext_ticket_expected = 0;
 344         s->tlsext_status_type = -1;
 345         s->tlsext_status_expected = 0;
 346         s->tlsext_ocsp_ids = NULL;
 347         s->tlsext_ocsp_exts = NULL;
 348         s->tlsext_ocsp_resp = NULL;
 349         s->tlsext_ocsp_resplen = -1;
 350         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 351         s->initial_ctx=ctx;
 352 #endif
 353
 354         s->verify_result=X509_V_OK;
 355
 356         s->method=ctx->method;
 357
 358         if (!s->method->ssl_new(s))
 359                 goto err;
 360
 361         s->references=1;
 362         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 363
 364         SSL_clear(s);
 365
 366         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 367
 368 #ifndef OPENSSL_NO_PSK
 369         s->psk_client_callback=ctx->psk_client_callback;
 370         s->psk_server_callback=ctx->psk_server_callback;
 371 #endif
 372
 373         return(s);
 374 err:
 375         if (s != NULL)
 376                 {
 377                 if (s->cert != NULL)
 378                         ssl_cert_free(s->cert);
 379                 if (s->ctx != NULL)
 380                         SSL_CTX_free(s->ctx); /* decrement reference count */
 381                 OPENSSL_free(s);
 382                 }
 383         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 384         return(NULL);
 385         }
 386
 387 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 388                                    unsigned int sid_ctx_len)
 389     {
 390     if(sid_ctx_len > sizeof ctx->sid_ctx)
 391         {
 392         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 393         return 0;
 394         }
 395     ctx->sid_ctx_length=sid_ctx_len;
 396     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 397
 398     return 1;
 399     }
 400
 401 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 402                                unsigned int sid_ctx_len)
 403     {
 404     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 405         {
 406         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 407         return 0;
 408         }
 409     ssl->sid_ctx_length=sid_ctx_len;
 410     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 411
 412     return 1;
 413     }
 414
 415 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 416         {
 417         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 418         ctx->generate_session_id = cb;
 419         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 420         return 1;
 421         }
 422
 423 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 424         {
 425         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 426         ssl->generate_session_id = cb;
 427         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 428         return 1;
 429         }
 430
 431 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 432                                 unsigned int id_len)
 433         {
 434         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 435          * we can "construct" a session to give us the desired check - ie. to
 436          * find if there's a session in the hash table that would conflict with
 437          * any new session built out of this id/id_len and the ssl_version in
 438          * use by this SSL. */
 439         SSL_SESSION r, *p;
 440
 441         if(id_len > sizeof r.session_id)
 442                 return 0;
 443
 444         r.ssl_version = ssl->version;
 445         r.session_id_length = id_len;
 446         memcpy(r.session_id, id, id_len);
 447         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 448          * callback is calling us to check the uniqueness of a shorter ID, it
 449          * must be compared as a padded-out ID because that is what it will be
 450          * converted to when the callback has finished choosing it. */
 451         if((r.ssl_version == SSL2_VERSION) &&
 452                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 453                 {
 454                 memset(r.session_id + id_len, 0,
 455                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 456                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 457                 }
 458
 459         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 460         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
 461         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 462         return (p != NULL);
 463         }
 464
 465 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 466         {
 467         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 468         }
 469
 470 int SSL_set_purpose(SSL *s, int purpose)
 471         {
 472         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 473         }
 474
 475 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 476         {
 477         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 478         }
 479
 480 int SSL_set_trust(SSL *s, int trust)
 481         {
 482         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 483         }
 484
 485 void SSL_free(SSL *s)
 486         {
 487         int i;
 488
 489         if(s == NULL)
 490             return;
 491
 492         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 493 #ifdef REF_PRINT
 494         REF_PRINT("SSL",s);
 495 #endif
 496         if (i > 0) return;
 497 #ifdef REF_CHECK
 498         if (i < 0)
 499                 {
 500                 fprintf(stderr,"SSL_free, bad reference count\n");
 501                 abort(); /* ok */
 502                 }
 503 #endif
 504
 505         if (s->param)
 506                 X509_VERIFY_PARAM_free(s->param);
 507
 508         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 509
 510         if (s->bbio != NULL)
 511                 {
 512                 /* If the buffering BIO is in place, pop it off */
 513                 if (s->bbio == s->wbio)
 514                         {
 515                         s->wbio=BIO_pop(s->wbio);
 516                         }
 517                 BIO_free(s->bbio);
 518                 s->bbio=NULL;
 519                 }
 520         if (s->rbio != NULL)
 521                 BIO_free_all(s->rbio);
 522         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 523                 BIO_free_all(s->wbio);
 524
 525         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 526
 527         /* add extra stuff */
 528         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 529         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 530
 531         /* Make the next call work :-) */
 532         if (s->session != NULL)
 533                 {
 534                 ssl_clear_bad_session(s);
 535                 SSL_SESSION_free(s->session);
 536                 }
 537
 538         ssl_clear_cipher_ctx(s);
 539         ssl_clear_hash_ctx(&s->read_hash);
 540         ssl_clear_hash_ctx(&s->write_hash);
 541
 542         if (s->cert != NULL) ssl_cert_free(s->cert);
 543         /* Free up if allocated */
 544
 545         if (s->ctx) SSL_CTX_free(s->ctx);
 546 #ifndef OPENSSL_NO_TLSEXT
 547         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 548 #ifndef OPENSSL_NO_EC
 549         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 550         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 551 #endif /* OPENSSL_NO_EC */
 552         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 553         if (s->tlsext_ocsp_exts)
 554                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 555                                                 X509_EXTENSION_free);
 556         if (s->tlsext_ocsp_ids)
 557                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 558         if (s->tlsext_ocsp_resp)
 559                 OPENSSL_free(s->tlsext_ocsp_resp);
 560 #endif
 561
 562         if (s->client_CA != NULL)
 563                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 564
 565         if (s->method != NULL) s->method->ssl_free(s);
 566
 567 #ifndef OPENSSL_NO_KRB5
 568         if (s->kssl_ctx != NULL)
 569                 kssl_ctx_free(s->kssl_ctx);
 570 #endif  /* OPENSSL_NO_KRB5 */
 571
 572         OPENSSL_free(s);
 573         }
 574
 575 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 576         {
 577         /* If the output buffering BIO is still in place, remove it
 578          */
 579         if (s->bbio != NULL)
 580                 {
 581                 if (s->wbio == s->bbio)
 582                         {
 583                         s->wbio=s->wbio->next_bio;
 584                         s->bbio->next_bio=NULL;
 585                         }
 586                 }
 587         if ((s->rbio != NULL) && (s->rbio != rbio))
 588                 BIO_free_all(s->rbio);
 589         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 590                 BIO_free_all(s->wbio);
 591         s->rbio=rbio;
 592         s->wbio=wbio;
 593         }
 594
 595 BIO *SSL_get_rbio(const SSL *s)
 596         { return(s->rbio); }
 597
 598 BIO *SSL_get_wbio(const SSL *s)
 599         { return(s->wbio); }
 600
 601 int SSL_get_fd(const SSL *s)
 602         {
 603         return(SSL_get_rfd(s));
 604         }
 605
 606 int SSL_get_rfd(const SSL *s)
 607         {
 608         int ret= -1;
 609         BIO *b,*r;
 610
 611         b=SSL_get_rbio(s);
 612         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 613         if (r != NULL)
 614                 BIO_get_fd(r,&ret);
 615         return(ret);
 616         }
 617
 618 int SSL_get_wfd(const SSL *s)
 619         {
 620         int ret= -1;
 621         BIO *b,*r;
 622
 623         b=SSL_get_wbio(s);
 624         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 625         if (r != NULL)
 626                 BIO_get_fd(r,&ret);
 627         return(ret);
 628         }
 629
 630 #ifndef OPENSSL_NO_SOCK
 631 int SSL_set_fd(SSL *s,int fd)
 632         {
 633         int ret=0;
 634         BIO *bio=NULL;
 635
 636         bio=BIO_new(BIO_s_socket());
 637
 638         if (bio == NULL)
 639                 {
 640                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 641                 goto err;
 642                 }
 643         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 644         SSL_set_bio(s,bio,bio);
 645         ret=1;
 646 err:
 647         return(ret);
 648         }
 649
 650 int SSL_set_wfd(SSL *s,int fd)
 651         {
 652         int ret=0;
 653         BIO *bio=NULL;
 654
 655         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 656                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 657                 {
 658                 bio=BIO_new(BIO_s_socket());
 659
 660                 if (bio == NULL)
 661                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 662                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 663                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 664                 }
 665         else
 666                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 667         ret=1;
 668 err:
 669         return(ret);
 670         }
 671
 672 int SSL_set_rfd(SSL *s,int fd)
 673         {
 674         int ret=0;
 675         BIO *bio=NULL;
 676
 677         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 678                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 679                 {
 680                 bio=BIO_new(BIO_s_socket());
 681
 682                 if (bio == NULL)
 683                         {
 684                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 685                         goto err;
 686                         }
 687                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 688                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 689                 }
 690         else
 691                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 692         ret=1;
 693 err:
 694         return(ret);
 695         }
 696 #endif
 697
 698
 699 /* return length of latest Finished message we sent, copy to 'buf' */
 700 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 701         {
 702         size_t ret = 0;
 703
 704         if (s->s3 != NULL)
 705                 {
 706                 ret = s->s3->tmp.finish_md_len;
 707                 if (count > ret)
 708                         count = ret;
 709                 memcpy(buf, s->s3->tmp.finish_md, count);
 710                 }
 711         return ret;
 712         }
 713
 714 /* return length of latest Finished message we expected, copy to 'buf' */
 715 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 716         {
 717         size_t ret = 0;
 718
 719         if (s->s3 != NULL)
 720                 {
 721                 ret = s->s3->tmp.peer_finish_md_len;
 722                 if (count > ret)
 723                         count = ret;
 724                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 725                 }
 726         return ret;
 727         }
 728
 729
 730 int SSL_get_verify_mode(const SSL *s)
 731         {
 732         return(s->verify_mode);
 733         }
 734
 735 int SSL_get_verify_depth(const SSL *s)
 736         {
 737         return X509_VERIFY_PARAM_get_depth(s->param);
 738         }
 739
 740 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 741         {
 742         return(s->verify_callback);
 743         }
 744
 745 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 746         {
 747         return(ctx->verify_mode);
 748         }
 749
 750 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 751         {
 752         return X509_VERIFY_PARAM_get_depth(ctx->param);
 753         }
 754
 755 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 756         {
 757         return(ctx->default_verify_callback);
 758         }
 759
 760 void SSL_set_verify(SSL *s,int mode,
 761                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 762         {
 763         s->verify_mode=mode;
 764         if (callback != NULL)
 765                 s->verify_callback=callback;
 766         }
 767
 768 void SSL_set_verify_depth(SSL *s,int depth)
 769         {
 770         X509_VERIFY_PARAM_set_depth(s->param, depth);
 771         }
 772
 773 void SSL_set_read_ahead(SSL *s,int yes)
 774         {
 775         s->read_ahead=yes;
 776         }
 777
 778 int SSL_get_read_ahead(const SSL *s)
 779         {
 780         return(s->read_ahead);
 781         }
 782
 783 int SSL_pending(const SSL *s)
 784         {
 785         /* SSL_pending cannot work properly if read-ahead is enabled
 786          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 787          * and it is impossible to fix since SSL_pending cannot report
 788          * errors that may be observed while scanning the new data.
 789          * (Note that SSL_pending() is often used as a boolean value,
 790          * so we'd better not return -1.)
 791          */
 792         return(s->method->ssl_pending(s));
 793         }
 794
 795 X509 *SSL_get_peer_certificate(const SSL *s)
 796         {
 797         X509 *r;
 798
 799         if ((s == NULL) || (s->session == NULL))
 800                 r=NULL;
 801         else
 802                 r=s->session->peer;
 803
 804         if (r == NULL) return(r);
 805
 806         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 807
 808         return(r);
 809         }
 810
 811 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 812         {
 813         STACK_OF(X509) *r;
 814
 815         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 816                 r=NULL;
 817         else
 818                 r=s->session->sess_cert->cert_chain;
 819
 820         /* If we are a client, cert_chain includes the peer's own
 821          * certificate; if we are a server, it does not. */
 822
 823         return(r);
 824         }
 825
 826 /* Now in theory, since the calling process own 't' it should be safe to
 827  * modify.  We need to be able to read f without being hassled */
 828 void SSL_copy_session_id(SSL *t,const SSL *f)
 829         {
 830         CERT *tmp;
 831
 832         /* Do we need to to SSL locking? */
 833         SSL_set_session(t,SSL_get_session(f));
 834
 835         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 836          * vice-versa */
 837         if (t->method != f->method)
 838                 {
 839                 t->method->ssl_free(t); /* cleanup current */
 840                 t->method=f->method;    /* change method */
 841                 t->method->ssl_new(t);  /* setup new */
 842                 }
 843
 844         tmp=t->cert;
 845         if (f->cert != NULL)
 846                 {
 847                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 848                 t->cert=f->cert;
 849                 }
 850         else
 851                 t->cert=NULL;
 852         if (tmp != NULL) ssl_cert_free(tmp);
 853         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 854         }
 855
 856 /* Fix this so it checks all the valid key/cert options */
 857 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 858         {
 859         if (    (ctx == NULL) ||
 860                 (ctx->cert == NULL) ||
 861                 (ctx->cert->key->x509 == NULL))
 862                 {
 863                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 864                 return(0);
 865                 }
 866         if      (ctx->cert->key->privatekey == NULL)
 867                 {
 868                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 869                 return(0);
 870                 }
 871         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 872         }
 873
 874 /* Fix this function so that it takes an optional type parameter */
 875 int SSL_check_private_key(const SSL *ssl)
 876         {
 877         if (ssl == NULL)
 878                 {
 879                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 880                 return(0);
 881                 }
 882         if (ssl->cert == NULL)
 883                 {
 884                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 885                 return 0;
 886                 }
 887         if (ssl->cert->key->x509 == NULL)
 888                 {
 889                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 890                 return(0);
 891                 }
 892         if (ssl->cert->key->privatekey == NULL)
 893                 {
 894                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 895                 return(0);
 896                 }
 897         return(X509_check_private_key(ssl->cert->key->x509,
 898                 ssl->cert->key->privatekey));
 899         }
 900
 901 int SSL_accept(SSL *s)
 902         {
 903         if (s->handshake_func == 0)
 904                 /* Not properly initialized yet */
 905                 SSL_set_accept_state(s);
 906
 907         return(s->method->ssl_accept(s));
 908         }
 909
 910 int SSL_connect(SSL *s)
 911         {
 912         if (s->handshake_func == 0)
 913                 /* Not properly initialized yet */
 914                 SSL_set_connect_state(s);
 915
 916         return(s->method->ssl_connect(s));
 917         }
 918
 919 long SSL_get_default_timeout(const SSL *s)
 920         {
 921         return(s->method->get_timeout());
 922         }
 923
 924 int SSL_read(SSL *s,void *buf,int num)
 925         {
 926         if (s->handshake_func == 0)
 927                 {
 928                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 929                 return -1;
 930                 }
 931
 932         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 933                 {
 934                 s->rwstate=SSL_NOTHING;
 935                 return(0);
 936                 }
 937         return(s->method->ssl_read(s,buf,num));
 938         }
 939
 940 int SSL_peek(SSL *s,void *buf,int num)
 941         {
 942         if (s->handshake_func == 0)
 943                 {
 944                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 945                 return -1;
 946                 }
 947
 948         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 949                 {
 950                 return(0);
 951                 }
 952         return(s->method->ssl_peek(s,buf,num));
 953         }
 954
 955 int SSL_write(SSL *s,const void *buf,int num)
 956         {
 957         if (s->handshake_func == 0)
 958                 {
 959                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 960                 return -1;
 961                 }
 962
 963         if (s->shutdown & SSL_SENT_SHUTDOWN)
 964                 {
 965                 s->rwstate=SSL_NOTHING;
 966                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 967                 return(-1);
 968                 }
 969         return(s->method->ssl_write(s,buf,num));
 970         }
 971
 972 int SSL_shutdown(SSL *s)
 973         {
 974         /* Note that this function behaves differently from what one might
 975          * expect.  Return values are 0 for no success (yet),
 976          * 1 for success; but calling it once is usually not enough,
 977          * even if blocking I/O is used (see ssl3_shutdown).
 978          */
 979
 980         if (s->handshake_func == 0)
 981                 {
 982                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 983                 return -1;
 984                 }
 985
 986         if ((s != NULL) && !SSL_in_init(s))
 987                 return(s->method->ssl_shutdown(s));
 988         else
 989                 return(1);
 990         }
 991
 992 int SSL_renegotiate(SSL *s)
 993         {
 994         if (s->new_session == 0)
 995                 {
 996                 s->new_session=1;
 997                 }
 998         return(s->method->ssl_renegotiate(s));
 999         }
1000
1001 int SSL_renegotiate_pending(SSL *s)
1002         {
1003         /* becomes true when negotiation is requested;
1004          * false again once a handshake has finished */
1005         return (s->new_session != 0);
1006         }
1007
1008 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1009         {
1010         long l;
1011
1012         switch (cmd)
1013                 {
1014         case SSL_CTRL_GET_READ_AHEAD:
1015                 return(s->read_ahead);
1016         case SSL_CTRL_SET_READ_AHEAD:
1017                 l=s->read_ahead;
1018                 s->read_ahead=larg;
1019                 return(l);
1020
1021         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1022                 s->msg_callback_arg = parg;
1023                 return 1;
1024
1025         case SSL_CTRL_OPTIONS:
1026                 return(s->options|=larg);
1027         case SSL_CTRL_MODE:
1028                 return(s->mode|=larg);
1029         case SSL_CTRL_GET_MAX_CERT_LIST:
1030                 return(s->max_cert_list);
1031         case SSL_CTRL_SET_MAX_CERT_LIST:
1032                 l=s->max_cert_list;
1033                 s->max_cert_list=larg;
1034                 return(l);
1035         case SSL_CTRL_SET_MTU:
1036                 if (SSL_version(s) == DTLS1_VERSION)
1037                         {
1038                         s->d1->mtu = larg;
1039                         return larg;
1040                         }
1041                 return 0;
1042         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1043                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1044                         return 0;
1045                 s->max_send_fragment = larg;
1046                 return 1;
1047         default:
1048                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1049                 }
1050         }
1051
1052 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1053         {
1054         switch(cmd)
1055                 {
1056         case SSL_CTRL_SET_MSG_CALLBACK:
1057                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1058                 return 1;
1059
1060         default:
1061                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1062                 }
1063         }
1064
1065 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
1066         {
1067         return ctx->sessions;
1068         }
1069
1070 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1071         {
1072         long l;
1073
1074         switch (cmd)
1075                 {
1076         case SSL_CTRL_GET_READ_AHEAD:
1077                 return(ctx->read_ahead);
1078         case SSL_CTRL_SET_READ_AHEAD:
1079                 l=ctx->read_ahead;
1080                 ctx->read_ahead=larg;
1081                 return(l);
1082
1083         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1084                 ctx->msg_callback_arg = parg;
1085                 return 1;
1086
1087         case SSL_CTRL_GET_MAX_CERT_LIST:
1088                 return(ctx->max_cert_list);
1089         case SSL_CTRL_SET_MAX_CERT_LIST:
1090                 l=ctx->max_cert_list;
1091                 ctx->max_cert_list=larg;
1092                 return(l);
1093
1094         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1095                 l=ctx->session_cache_size;
1096                 ctx->session_cache_size=larg;
1097                 return(l);
1098         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1099                 return(ctx->session_cache_size);
1100         case SSL_CTRL_SET_SESS_CACHE_MODE:
1101                 l=ctx->session_cache_mode;
1102                 ctx->session_cache_mode=larg;
1103                 return(l);
1104         case SSL_CTRL_GET_SESS_CACHE_MODE:
1105                 return(ctx->session_cache_mode);
1106
1107         case SSL_CTRL_SESS_NUMBER:
1108                 return(ctx->sessions->num_items);
1109         case SSL_CTRL_SESS_CONNECT:
1110                 return(ctx->stats.sess_connect);
1111         case SSL_CTRL_SESS_CONNECT_GOOD:
1112                 return(ctx->stats.sess_connect_good);
1113         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1114                 return(ctx->stats.sess_connect_renegotiate);
1115         case SSL_CTRL_SESS_ACCEPT:
1116                 return(ctx->stats.sess_accept);
1117         case SSL_CTRL_SESS_ACCEPT_GOOD:
1118                 return(ctx->stats.sess_accept_good);
1119         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1120                 return(ctx->stats.sess_accept_renegotiate);
1121         case SSL_CTRL_SESS_HIT:
1122                 return(ctx->stats.sess_hit);
1123         case SSL_CTRL_SESS_CB_HIT:
1124                 return(ctx->stats.sess_cb_hit);
1125         case SSL_CTRL_SESS_MISSES:
1126                 return(ctx->stats.sess_miss);
1127         case SSL_CTRL_SESS_TIMEOUTS:
1128                 return(ctx->stats.sess_timeout);
1129         case SSL_CTRL_SESS_CACHE_FULL:
1130                 return(ctx->stats.sess_cache_full);
1131         case SSL_CTRL_OPTIONS:
1132                 return(ctx->options|=larg);
1133         case SSL_CTRL_MODE:
1134                 return(ctx->mode|=larg);
1135         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1136                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1137                         return 0;
1138                 ctx->max_send_fragment = larg;
1139                 return 1;
1140         default:
1141                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1142                 }
1143         }
1144
1145 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1146         {
1147         switch(cmd)
1148                 {
1149         case SSL_CTRL_SET_MSG_CALLBACK:
1150                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1151                 return 1;
1152
1153         default:
1154                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1155                 }
1156         }
1157
1158 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1159         {
1160         long l;
1161
1162         l=a->id-b->id;
1163         if (l == 0L)
1164                 return(0);
1165         else
1166                 return((l > 0)?1:-1);
1167         }
1168
1169 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1170                         const SSL_CIPHER * const *bp)
1171         {
1172         long l;
1173
1174         l=(*ap)->id-(*bp)->id;
1175         if (l == 0L)
1176                 return(0);
1177         else
1178                 return((l > 0)?1:-1);
1179         }
1180
1181 /** return a STACK of the ciphers available for the SSL and in order of
1182  * preference */
1183 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1184         {
1185         if (s != NULL)
1186                 {
1187                 if (s->cipher_list != NULL)
1188                         {
1189                         return(s->cipher_list);
1190                         }
1191                 else if ((s->ctx != NULL) &&
1192                         (s->ctx->cipher_list != NULL))
1193                         {
1194                         return(s->ctx->cipher_list);
1195                         }
1196                 }
1197         return(NULL);
1198         }
1199
1200 /** return a STACK of the ciphers available for the SSL and in order of
1201  * algorithm id */
1202 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1203         {
1204         if (s != NULL)
1205                 {
1206                 if (s->cipher_list_by_id != NULL)
1207                         {
1208                         return(s->cipher_list_by_id);
1209                         }
1210                 else if ((s->ctx != NULL) &&
1211                         (s->ctx->cipher_list_by_id != NULL))
1212                         {
1213                         return(s->ctx->cipher_list_by_id);
1214                         }
1215                 }
1216         return(NULL);
1217         }
1218
1219 /** The old interface to get the same thing as SSL_get_ciphers() */
1220 const char *SSL_get_cipher_list(const SSL *s,int n)
1221         {
1222         SSL_CIPHER *c;
1223         STACK_OF(SSL_CIPHER) *sk;
1224
1225         if (s == NULL) return(NULL);
1226         sk=SSL_get_ciphers(s);
1227         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1228                 return(NULL);
1229         c=sk_SSL_CIPHER_value(sk,n);
1230         if (c == NULL) return(NULL);
1231         return(c->name);
1232         }
1233
1234 /** specify the ciphers to be used by default by the SSL_CTX */
1235 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1236         {
1237         STACK_OF(SSL_CIPHER) *sk;
1238
1239         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1240                 &ctx->cipher_list_by_id,str);
1241         /* ssl_create_cipher_list may return an empty stack if it
1242          * was unable to find a cipher matching the given rule string
1243          * (for example if the rule string specifies a cipher which
1244          * has been disabled). This is not an error as far as
1245          * ssl_create_cipher_list is concerned, and hence
1246          * ctx->cipher_list and ctx->cipher_list_by_id has been
1247          * updated. */
1248         if (sk == NULL)
1249                 return 0;
1250         else if (sk_SSL_CIPHER_num(sk) == 0)
1251                 {
1252                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1253                 return 0;
1254                 }
1255         return 1;
1256         }
1257
1258 /** specify the ciphers to be used by the SSL */
1259 int SSL_set_cipher_list(SSL *s,const char *str)
1260         {
1261         STACK_OF(SSL_CIPHER) *sk;
1262
1263         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1264                 &s->cipher_list_by_id,str);
1265         /* see comment in SSL_CTX_set_cipher_list */
1266         if (sk == NULL)
1267                 return 0;
1268         else if (sk_SSL_CIPHER_num(sk) == 0)
1269                 {
1270                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1271                 return 0;
1272                 }
1273         return 1;
1274         }
1275
1276 /* works well for SSLv2, not so good for SSLv3 */
1277 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1278         {
1279         char *p;
1280         STACK_OF(SSL_CIPHER) *sk;
1281         SSL_CIPHER *c;
1282         int i;
1283
1284         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1285                 (len < 2))
1286                 return(NULL);
1287
1288         p=buf;
1289         sk=s->session->ciphers;
1290         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1291                 {
1292                 int n;
1293
1294                 c=sk_SSL_CIPHER_value(sk,i);
1295                 n=strlen(c->name);
1296                 if (n+1 > len)
1297                         {
1298                         if (p != buf)
1299                                 --p;
1300                         *p='\0';
1301                         return buf;
1302                         }
1303                 strcpy(p,c->name);
1304                 p+=n;
1305                 *(p++)=':';
1306                 len-=n+1;
1307                 }
1308         p[-1]='\0';
1309         return(buf);
1310         }
1311
1312 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1313                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1314         {
1315         int i,j=0;
1316         SSL_CIPHER *c;
1317         unsigned char *q;
1318 #ifndef OPENSSL_NO_KRB5
1319         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1320 #endif /* OPENSSL_NO_KRB5 */
1321
1322         if (sk == NULL) return(0);
1323         q=p;
1324
1325         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1326                 {
1327                 c=sk_SSL_CIPHER_value(sk,i);
1328 #ifndef OPENSSL_NO_KRB5
1329                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1330                     nokrb5)
1331                     continue;
1332 #endif /* OPENSSL_NO_KRB5 */
1333 #ifndef OPENSSL_NO_PSK
1334                 /* with PSK there must be client callback set */
1335                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1336                     s->psk_client_callback == NULL)
1337                         continue;
1338 #endif /* OPENSSL_NO_PSK */
1339                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1340                 p+=j;
1341                 }
1342         return(p-q);
1343         }
1344
1345 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1346                                                STACK_OF(SSL_CIPHER) **skp)
1347         {
1348         SSL_CIPHER *c;
1349         STACK_OF(SSL_CIPHER) *sk;
1350         int i,n;
1351
1352         n=ssl_put_cipher_by_char(s,NULL,NULL);
1353         if ((num%n) != 0)
1354                 {
1355                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1356                 return(NULL);
1357                 }
1358         if ((skp == NULL) || (*skp == NULL))
1359                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1360         else
1361                 {
1362                 sk= *skp;
1363                 sk_SSL_CIPHER_zero(sk);
1364                 }
1365
1366         for (i=0; i<num; i+=n)
1367                 {
1368                 c=ssl_get_cipher_by_char(s,p);
1369                 p+=n;
1370                 if (c != NULL)
1371                         {
1372                         if (!sk_SSL_CIPHER_push(sk,c))
1373                                 {
1374                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1375                                 goto err;
1376                                 }
1377                         }
1378                 }
1379
1380         if (skp != NULL)
1381                 *skp=sk;
1382         return(sk);
1383 err:
1384         if ((skp == NULL) || (*skp == NULL))
1385                 sk_SSL_CIPHER_free(sk);
1386         return(NULL);
1387         }
1388
1389
1390 #ifndef OPENSSL_NO_TLSEXT
1391 /** return a servername extension value if provided in Client Hello, or NULL.
1392  * So far, only host_name types are defined (RFC 3546).
1393  */
1394
1395 const char *SSL_get_servername(const SSL *s, const int type)
1396         {
1397         if (type != TLSEXT_NAMETYPE_host_name)
1398                 return NULL;
1399
1400         return s->session && !s->tlsext_hostname ?
1401                 s->session->tlsext_hostname :
1402                 s->tlsext_hostname;
1403         }
1404
1405 int SSL_get_servername_type(const SSL *s)
1406         {
1407         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1408                 return TLSEXT_NAMETYPE_host_name;
1409         return -1;
1410         }
1411 #endif
1412
1413 unsigned long SSL_SESSION_hash(const SSL_SESSION *a)
1414         {
1415         unsigned long l;
1416
1417         l=(unsigned long)
1418                 ((unsigned int) a->session_id[0]     )|
1419                 ((unsigned int) a->session_id[1]<< 8L)|
1420                 ((unsigned long)a->session_id[2]<<16L)|
1421                 ((unsigned long)a->session_id[3]<<24L);
1422         return(l);
1423         }
1424
1425 /* NB: If this function (or indeed the hash function which uses a sort of
1426  * coarser function than this one) is changed, ensure
1427  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1428  * able to construct an SSL_SESSION that will collide with any existing session
1429  * with a matching session ID. */
1430 int SSL_SESSION_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1431         {
1432         if (a->ssl_version != b->ssl_version)
1433                 return(1);
1434         if (a->session_id_length != b->session_id_length)
1435                 return(1);
1436         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1437         }
1438
1439 /* These wrapper functions should remain rather than redeclaring
1440  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1441  * variable. The reason is that the functions aren't static, they're exposed via
1442  * ssl.h. */
1443 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1444 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1445
1446 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1447         {
1448         SSL_CTX *ret=NULL;
1449
1450         if (meth == NULL)
1451                 {
1452                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1453                 return(NULL);
1454                 }
1455
1456         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1457                 {
1458                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1459                 goto err;
1460                 }
1461         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1462         if (ret == NULL)
1463                 goto err;
1464
1465         memset(ret,0,sizeof(SSL_CTX));
1466
1467         ret->method=meth;
1468
1469         ret->cert_store=NULL;
1470         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1471         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1472         ret->session_cache_head=NULL;
1473         ret->session_cache_tail=NULL;
1474
1475         /* We take the system default */
1476         ret->session_timeout=meth->get_timeout();
1477
1478         ret->new_session_cb=0;
1479         ret->remove_session_cb=0;
1480         ret->get_session_cb=0;
1481         ret->generate_session_id=0;
1482
1483         memset((char *)&ret->stats,0,sizeof(ret->stats));
1484
1485         ret->references=1;
1486         ret->quiet_shutdown=0;
1487
1488 /*      ret->cipher=NULL;*/
1489 /*      ret->s2->challenge=NULL;
1490         ret->master_key=NULL;
1491         ret->key_arg=NULL;
1492         ret->s2->conn_id=NULL; */
1493
1494         ret->info_callback=NULL;
1495
1496         ret->app_verify_callback=0;
1497         ret->app_verify_arg=NULL;
1498
1499         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1500         ret->read_ahead=0;
1501         ret->msg_callback=0;
1502         ret->msg_callback_arg=NULL;
1503         ret->verify_mode=SSL_VERIFY_NONE;
1504 #if 0
1505         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1506 #endif
1507         ret->sid_ctx_length=0;
1508         ret->default_verify_callback=NULL;
1509         if ((ret->cert=ssl_cert_new()) == NULL)
1510                 goto err;
1511
1512         ret->default_passwd_callback=0;
1513         ret->default_passwd_callback_userdata=NULL;
1514         ret->client_cert_cb=0;
1515         ret->app_gen_cookie_cb=0;
1516         ret->app_verify_cookie_cb=0;
1517
1518         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1519                         LHASH_COMP_FN(SSL_SESSION_cmp));
1520         if (ret->sessions == NULL) goto err;
1521         ret->cert_store=X509_STORE_new();
1522         if (ret->cert_store == NULL) goto err;
1523
1524         ssl_create_cipher_list(ret->method,
1525                 &ret->cipher_list,&ret->cipher_list_by_id,
1526                 SSL_DEFAULT_CIPHER_LIST);
1527         if (ret->cipher_list == NULL
1528             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1529                 {
1530                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1531                 goto err2;
1532                 }
1533
1534         ret->param = X509_VERIFY_PARAM_new();
1535         if (!ret->param)
1536                 goto err;
1537
1538         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1539                 {
1540                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1541                 goto err2;
1542                 }
1543         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1544                 {
1545                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1546                 goto err2;
1547                 }
1548         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1549                 {
1550                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1551                 goto err2;
1552                 }
1553
1554         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1555                 goto err;
1556
1557         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1558
1559         ret->extra_certs=NULL;
1560         ret->comp_methods=SSL_COMP_get_compression_methods();
1561
1562         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1563
1564 #ifndef OPENSSL_NO_TLSEXT
1565         ret->tlsext_servername_callback = 0;
1566         ret->tlsext_servername_arg = NULL;
1567         /* Setup RFC4507 ticket keys */
1568         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1569                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1570                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1571                 ret->options |= SSL_OP_NO_TICKET;
1572
1573         ret->tlsext_status_cb = 0;
1574         ret->tlsext_status_arg = NULL;
1575
1576 #endif
1577 #ifndef OPENSSL_NO_PSK
1578         ret->psk_identity_hint=NULL;
1579         ret->psk_client_callback=NULL;
1580         ret->psk_server_callback=NULL;
1581 #endif
1582         return(ret);
1583 err:
1584         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1585 err2:
1586         if (ret != NULL) SSL_CTX_free(ret);
1587         return(NULL);
1588         }
1589
1590 #if 0
1591 static void SSL_COMP_free(SSL_COMP *comp)
1592     { OPENSSL_free(comp); }
1593 #endif
1594
1595 void SSL_CTX_free(SSL_CTX *a)
1596         {
1597         int i;
1598
1599         if (a == NULL) return;
1600
1601         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1602 #ifdef REF_PRINT
1603         REF_PRINT("SSL_CTX",a);
1604 #endif
1605         if (i > 0) return;
1606 #ifdef REF_CHECK
1607         if (i < 0)
1608                 {
1609                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1610                 abort(); /* ok */
1611                 }
1612 #endif
1613
1614         if (a->param)
1615                 X509_VERIFY_PARAM_free(a->param);
1616
1617         /*
1618          * Free internal session cache. However: the remove_cb() may reference
1619          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1620          * after the sessions were flushed.
1621          * As the ex_data handling routines might also touch the session cache,
1622          * the most secure solution seems to be: empty (flush) the cache, then
1623          * free ex_data, then finally free the cache.
1624          * (See ticket [openssl.org #212].)
1625          */
1626         if (a->sessions != NULL)
1627                 SSL_CTX_flush_sessions(a,0);
1628
1629         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1630
1631         if (a->sessions != NULL)
1632                 lh_free(a->sessions);
1633
1634         if (a->cert_store != NULL)
1635                 X509_STORE_free(a->cert_store);
1636         if (a->cipher_list != NULL)
1637                 sk_SSL_CIPHER_free(a->cipher_list);
1638         if (a->cipher_list_by_id != NULL)
1639                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1640         if (a->cert != NULL)
1641                 ssl_cert_free(a->cert);
1642         if (a->client_CA != NULL)
1643                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1644         if (a->extra_certs != NULL)
1645                 sk_X509_pop_free(a->extra_certs,X509_free);
1646 #if 0 /* This should never be done, since it removes a global database */
1647         if (a->comp_methods != NULL)
1648                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1649 #else
1650         a->comp_methods = NULL;
1651 #endif
1652
1653 #ifndef OPENSSL_NO_PSK
1654         if (a->psk_identity_hint)
1655                 OPENSSL_free(a->psk_identity_hint);
1656 #endif
1657         OPENSSL_free(a);
1658         }
1659
1660 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1661         {
1662         ctx->default_passwd_callback=cb;
1663         }
1664
1665 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1666         {
1667         ctx->default_passwd_callback_userdata=u;
1668         }
1669
1670 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1671         {
1672         ctx->app_verify_callback=cb;
1673         ctx->app_verify_arg=arg;
1674         }
1675
1676 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1677         {
1678         ctx->verify_mode=mode;
1679         ctx->default_verify_callback=cb;
1680         }
1681
1682 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1683         {
1684         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1685         }
1686
1687 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1688         {
1689         CERT_PKEY *cpk;
1690         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1691         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1692         int rsa_tmp_export,dh_tmp_export,kl;
1693         unsigned long mask_k,mask_a,emask_k,emask_a;
1694         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1695 #ifndef OPENSSL_NO_ECDH
1696         int have_ecdh_tmp;
1697 #endif
1698         X509 *x = NULL;
1699         EVP_PKEY *ecc_pkey = NULL;
1700         int signature_nid = 0;
1701
1702         if (c == NULL) return;
1703
1704         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1705
1706 #ifndef OPENSSL_NO_RSA
1707         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1708         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1709                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1710 #else
1711         rsa_tmp=rsa_tmp_export=0;
1712 #endif
1713 #ifndef OPENSSL_NO_DH
1714         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1715         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1716                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1717 #else
1718         dh_tmp=dh_tmp_export=0;
1719 #endif
1720
1721 #ifndef OPENSSL_NO_ECDH
1722         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1723 #endif
1724         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1725         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1726         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1727         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1728         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1729         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1730         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1731         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1732         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1733         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1734         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1735 /* FIX THIS EAY EAY EAY */
1736         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1737         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1738         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1739         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1740         mask_k=0;
1741         mask_a=0;
1742         emask_k=0;
1743         emask_a=0;
1744
1745
1746
1747 #ifdef CIPHER_DEBUG
1748         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1749                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1750                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1751 #endif
1752
1753         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1754         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1755                 mask_k |= SSL_kGOST;
1756                 mask_a |= SSL_aGOST01;
1757         }
1758         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1759         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1760                 mask_k |= SSL_kGOST;
1761                 mask_a |= SSL_aGOST94;
1762         }
1763
1764         if (rsa_enc || (rsa_tmp && rsa_sign))
1765                 mask_k|=SSL_kRSA;
1766         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1767                 emask_k|=SSL_kRSA;
1768
1769 #if 0
1770         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1771         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1772                 (rsa_enc || rsa_sign || dsa_sign))
1773                 mask_k|=SSL_kEDH;
1774         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1775                 (rsa_enc || rsa_sign || dsa_sign))
1776                 emask_k|=SSL_kEDH;
1777 #endif
1778
1779         if (dh_tmp_export)
1780                 emask_k|=SSL_kEDH;
1781
1782         if (dh_tmp)
1783                 mask_k|=SSL_kEDH;
1784
1785         if (dh_rsa) mask_k|=SSL_kDHr;
1786         if (dh_rsa_export) emask_k|=SSL_kDHr;
1787
1788         if (dh_dsa) mask_k|=SSL_kDHd;
1789         if (dh_dsa_export) emask_k|=SSL_kDHd;
1790
1791         if (rsa_enc || rsa_sign)
1792                 {
1793                 mask_a|=SSL_aRSA;
1794                 emask_a|=SSL_aRSA;
1795                 }
1796
1797         if (dsa_sign)
1798                 {
1799                 mask_a|=SSL_aDSS;
1800                 emask_a|=SSL_aDSS;
1801                 }
1802
1803         mask_a|=SSL_aNULL;
1804         emask_a|=SSL_aNULL;
1805
1806 #ifndef OPENSSL_NO_KRB5
1807         mask_k|=SSL_kKRB5;
1808         mask_a|=SSL_aKRB5;
1809         emask_k|=SSL_kKRB5;
1810         emask_a|=SSL_aKRB5;
1811 #endif
1812
1813         /* An ECC certificate may be usable for ECDH and/or
1814          * ECDSA cipher suites depending on the key usage extension.
1815          */
1816         if (have_ecc_cert)
1817                 {
1818                 /* This call populates extension flags (ex_flags) */
1819                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1820                 X509_check_purpose(x, -1, 0);
1821                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1822                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1823                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1824                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1825                 ecc_pkey = X509_get_pubkey(x);
1826                 ecc_pkey_size = (ecc_pkey != NULL) ?
1827                     EVP_PKEY_bits(ecc_pkey) : 0;
1828                 EVP_PKEY_free(ecc_pkey);
1829                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1830                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1831 #ifndef OPENSSL_NO_ECDH
1832                 if (ecdh_ok)
1833                         {
1834                         const char *sig = OBJ_nid2ln(signature_nid);
1835                         if (sig == NULL)
1836                                 {
1837                                 ERR_clear_error();
1838                                 sig = "unknown";
1839                                 }
1840
1841                         if (strstr(sig, "WithRSA"))
1842                                 {
1843                                 mask_k|=SSL_kECDHr;
1844                                 mask_a|=SSL_aECDH;
1845                                 if (ecc_pkey_size <= 163)
1846                                         {
1847                                         emask_k|=SSL_kECDHr;
1848                                         emask_a|=SSL_aECDH;
1849                                         }
1850                                 }
1851
1852                         if (signature_nid == NID_ecdsa_with_SHA1)
1853                                 {
1854                                 mask_k|=SSL_kECDHe;
1855                                 mask_a|=SSL_aECDH;
1856                                 if (ecc_pkey_size <= 163)
1857                                         {
1858                                         emask_k|=SSL_kECDHe;
1859                                         emask_a|=SSL_aECDH;
1860                                         }
1861                                 }
1862                         }
1863 #endif
1864 #ifndef OPENSSL_NO_ECDSA
1865                 if (ecdsa_ok)
1866                         {
1867                         mask_a|=SSL_aECDSA;
1868                         emask_a|=SSL_aECDSA;
1869                         }
1870 #endif
1871                 }
1872
1873 #ifndef OPENSSL_NO_ECDH
1874         if (have_ecdh_tmp)
1875                 {
1876                 mask_k|=SSL_kEECDH;
1877                 emask_k|=SSL_kEECDH;
1878                 }
1879 #endif
1880
1881 #ifndef OPENSSL_NO_PSK
1882         mask_k |= SSL_kPSK;
1883         mask_a |= SSL_aPSK;
1884         emask_k |= SSL_kPSK;
1885         emask_a |= SSL_aPSK;
1886 #endif
1887
1888         c->mask_k=mask_k;
1889         c->mask_a=mask_a;
1890         c->export_mask_k=emask_k;
1891         c->export_mask_a=emask_a;
1892         c->valid=1;
1893         }
1894
1895 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1896 #define ku_reject(x, usage) \
1897         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1898
1899 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1900         {
1901         unsigned long alg_k, alg_a;
1902         EVP_PKEY *pkey = NULL;
1903         int keysize = 0;
1904         int signature_nid = 0;
1905
1906         alg_k = cs->algorithm_mkey;
1907         alg_a = cs->algorithm_auth;
1908
1909         if (SSL_C_IS_EXPORT(cs))
1910                 {
1911                 /* ECDH key length in export ciphers must be <= 163 bits */
1912                 pkey = X509_get_pubkey(x);
1913                 if (pkey == NULL) return 0;
1914                 keysize = EVP_PKEY_bits(pkey);
1915                 EVP_PKEY_free(pkey);
1916                 if (keysize > 163) return 0;
1917                 }
1918
1919         /* This call populates the ex_flags field correctly */
1920         X509_check_purpose(x, -1, 0);
1921         if ((x->sig_alg) && (x->sig_alg->algorithm))
1922                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1923         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
1924                 {
1925                 /* key usage, if present, must allow key agreement */
1926                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1927                         {
1928                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
1929                         return 0;
1930                         }
1931                 if (alg_k & SSL_kECDHe)
1932                         {
1933                         /* signature alg must be ECDSA */
1934                         if (signature_nid != NID_ecdsa_with_SHA1)
1935                                 {
1936                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
1937                                 return 0;
1938                                 }
1939                         }
1940                 if (alg_k & SSL_kECDHr)
1941                         {
1942                         /* signature alg must be RSA */
1943
1944                         const char *sig = OBJ_nid2ln(signature_nid);
1945                         if (sig == NULL)
1946                                 {
1947                                 ERR_clear_error();
1948                                 sig = "unknown";
1949                                 }
1950                         if (strstr(sig, "WithRSA") == NULL)
1951                                 {
1952                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
1953                                 return 0;
1954                                 }
1955                         }
1956                 }
1957         if (alg_a & SSL_aECDSA)
1958                 {
1959                 /* key usage, if present, must allow signing */
1960                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1961                         {
1962                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
1963                         return 0;
1964                         }
1965                 }
1966
1967         return 1;  /* all checks are ok */
1968         }
1969
1970 /* THIS NEEDS CLEANING UP */
1971 X509 *ssl_get_server_send_cert(SSL *s)
1972         {
1973         unsigned long alg_k,alg_a,mask_k,mask_a;
1974         CERT *c;
1975         int i,is_export;
1976
1977         c=s->cert;
1978         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1979         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1980         if (is_export)
1981                 {
1982                 mask_k = c->export_mask_k;
1983                 mask_a = c->export_mask_a;
1984                 }
1985         else
1986                 {
1987                 mask_k = c->mask_k;
1988                 mask_a = c->mask_a;
1989                 }
1990
1991         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1992         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1993
1994         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1995                 {
1996                 /* we don't need to look at SSL_kEECDH
1997                  * since no certificate is needed for
1998                  * anon ECDH and for authenticated
1999                  * EECDH, the check for the auth
2000                  * algorithm will set i correctly
2001                  * NOTE: For ECDH-RSA, we need an ECC
2002                  * not an RSA cert but for EECDH-RSA
2003                  * we need an RSA cert. Placing the
2004                  * checks for SSL_kECDH before RSA
2005                  * checks ensures the correct cert is chosen.
2006                  */
2007                 i=SSL_PKEY_ECC;
2008                 }
2009         else if (alg_a & SSL_aECDSA)
2010                 {
2011                 i=SSL_PKEY_ECC;
2012                 }
2013         else if (alg_k & SSL_kDHr)
2014                 i=SSL_PKEY_DH_RSA;
2015         else if (alg_k & SSL_kDHd)
2016                 i=SSL_PKEY_DH_DSA;
2017         else if (alg_a & SSL_aDSS)
2018                 i=SSL_PKEY_DSA_SIGN;
2019         else if (alg_a & SSL_aRSA)
2020                 {
2021                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2022                         i=SSL_PKEY_RSA_SIGN;
2023                 else
2024                         i=SSL_PKEY_RSA_ENC;
2025                 }
2026         else if (alg_a & SSL_aKRB5)
2027                 {
2028                 /* VRS something else here? */
2029                 return(NULL);
2030                 }
2031         else if (alg_a & SSL_aGOST94)
2032                 i=SSL_PKEY_GOST94;
2033         else if (alg_a & SSL_aGOST01)
2034                 i=SSL_PKEY_GOST01;
2035         else /* if (alg_a & SSL_aNULL) */
2036                 {
2037                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2038                 return(NULL);
2039                 }
2040         if (c->pkeys[i].x509 == NULL) return(NULL);
2041
2042         return(c->pkeys[i].x509);
2043         }
2044
2045 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
2046         {
2047         unsigned long alg_a;
2048         CERT *c;
2049
2050         alg_a = cipher->algorithm_auth;
2051         c=s->cert;
2052
2053         if ((alg_a & SSL_aDSS) &&
2054                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2055                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2056         else if (alg_a & SSL_aRSA)
2057                 {
2058                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2059                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2060                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2061                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2062                 else
2063                         return(NULL);
2064                 }
2065         else if ((alg_a & SSL_aECDSA) &&
2066                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2067                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2068         else /* if (alg_a & SSL_aNULL) */
2069                 {
2070                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2071                 return(NULL);
2072                 }
2073         }
2074
2075 void ssl_update_cache(SSL *s,int mode)
2076         {
2077         int i;
2078
2079         /* If the session_id_length is 0, we are not supposed to cache it,
2080          * and it would be rather hard to do anyway :-) */
2081         if (s->session->session_id_length == 0) return;
2082
2083         i=s->session_ctx->session_cache_mode;
2084         if ((i & mode) && (!s->hit)
2085                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2086                     || SSL_CTX_add_session(s->session_ctx,s->session))
2087                 && (s->session_ctx->new_session_cb != NULL))
2088                 {
2089                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2090                 if (!s->session_ctx->new_session_cb(s,s->session))
2091                         SSL_SESSION_free(s->session);
2092                 }
2093
2094         /* auto flush every 255 connections */
2095         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2096                 ((i & mode) == mode))
2097                 {
2098                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2099                         ?s->session_ctx->stats.sess_connect_good
2100                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2101                         {
2102                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2103                         }
2104                 }
2105         }
2106
2107 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2108         {
2109         return(s->method);
2110         }
2111
2112 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2113         {
2114         int conn= -1;
2115         int ret=1;
2116
2117         if (s->method != meth)
2118                 {
2119                 if (s->handshake_func != NULL)
2120                         conn=(s->handshake_func == s->method->ssl_connect);
2121
2122                 if (s->method->version == meth->version)
2123                         s->method=meth;
2124                 else
2125                         {
2126                         s->method->ssl_free(s);
2127                         s->method=meth;
2128                         ret=s->method->ssl_new(s);
2129                         }
2130
2131                 if (conn == 1)
2132                         s->handshake_func=meth->ssl_connect;
2133                 else if (conn == 0)
2134                         s->handshake_func=meth->ssl_accept;
2135                 }
2136         return(ret);
2137         }
2138
2139 int SSL_get_error(const SSL *s,int i)
2140         {
2141         int reason;
2142         unsigned long l;
2143         BIO *bio;
2144
2145         if (i > 0) return(SSL_ERROR_NONE);
2146
2147         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2148          * etc, where we do encode the error */
2149         if ((l=ERR_peek_error()) != 0)
2150                 {
2151                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2152                         return(SSL_ERROR_SYSCALL);
2153                 else
2154                         return(SSL_ERROR_SSL);
2155                 }
2156
2157         if ((i < 0) && SSL_want_read(s))
2158                 {
2159                 bio=SSL_get_rbio(s);
2160                 if (BIO_should_read(bio))
2161                         return(SSL_ERROR_WANT_READ);
2162                 else if (BIO_should_write(bio))
2163                         /* This one doesn't make too much sense ... We never try
2164                          * to write to the rbio, and an application program where
2165                          * rbio and wbio are separate couldn't even know what it
2166                          * should wait for.
2167                          * However if we ever set s->rwstate incorrectly
2168                          * (so that we have SSL_want_read(s) instead of
2169                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2170                          * this test works around that bug; so it might be safer
2171                          * to keep it. */
2172                         return(SSL_ERROR_WANT_WRITE);
2173                 else if (BIO_should_io_special(bio))
2174                         {
2175                         reason=BIO_get_retry_reason(bio);
2176                         if (reason == BIO_RR_CONNECT)
2177                                 return(SSL_ERROR_WANT_CONNECT);
2178                         else if (reason == BIO_RR_ACCEPT)
2179                                 return(SSL_ERROR_WANT_ACCEPT);
2180                         else
2181                                 return(SSL_ERROR_SYSCALL); /* unknown */
2182                         }
2183                 }
2184
2185         if ((i < 0) && SSL_want_write(s))
2186                 {
2187                 bio=SSL_get_wbio(s);
2188                 if (BIO_should_write(bio))
2189                         return(SSL_ERROR_WANT_WRITE);
2190                 else if (BIO_should_read(bio))
2191                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2192                         return(SSL_ERROR_WANT_READ);
2193                 else if (BIO_should_io_special(bio))
2194                         {
2195                         reason=BIO_get_retry_reason(bio);
2196                         if (reason == BIO_RR_CONNECT)
2197                                 return(SSL_ERROR_WANT_CONNECT);
2198                         else if (reason == BIO_RR_ACCEPT)
2199                                 return(SSL_ERROR_WANT_ACCEPT);
2200                         else
2201                                 return(SSL_ERROR_SYSCALL);
2202                         }
2203                 }
2204         if ((i < 0) && SSL_want_x509_lookup(s))
2205                 {
2206                 return(SSL_ERROR_WANT_X509_LOOKUP);
2207                 }
2208
2209         if (i == 0)
2210                 {
2211                 if (s->version == SSL2_VERSION)
2212                         {
2213                         /* assume it is the socket being closed */
2214                         return(SSL_ERROR_ZERO_RETURN);
2215                         }
2216                 else
2217                         {
2218                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2219                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2220                                 return(SSL_ERROR_ZERO_RETURN);
2221                         }
2222                 }
2223         return(SSL_ERROR_SYSCALL);
2224         }
2225
2226 int SSL_do_handshake(SSL *s)
2227         {
2228         int ret=1;
2229
2230         if (s->handshake_func == NULL)
2231                 {
2232                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2233                 return(-1);
2234                 }
2235
2236         s->method->ssl_renegotiate_check(s);
2237
2238         if (SSL_in_init(s) || SSL_in_before(s))
2239                 {
2240                 ret=s->handshake_func(s);
2241                 }
2242         return(ret);
2243         }
2244
2245 /* For the next 2 functions, SSL_clear() sets shutdown and so
2246  * one of these calls will reset it */
2247 void SSL_set_accept_state(SSL *s)
2248         {
2249         s->server=1;
2250         s->shutdown=0;
2251         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2252         s->handshake_func=s->method->ssl_accept;
2253         /* clear the current cipher */
2254         ssl_clear_cipher_ctx(s);
2255         ssl_clear_hash_ctx(&s->read_hash);
2256         ssl_clear_hash_ctx(&s->write_hash);
2257         }
2258
2259 void SSL_set_connect_state(SSL *s)
2260         {
2261         s->server=0;
2262         s->shutdown=0;
2263         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2264         s->handshake_func=s->method->ssl_connect;
2265         /* clear the current cipher */
2266         ssl_clear_cipher_ctx(s);
2267         ssl_clear_hash_ctx(&s->read_hash);
2268         ssl_clear_hash_ctx(&s->write_hash);
2269         }
2270
2271 int ssl_undefined_function(SSL *s)
2272         {
2273         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2274         return(0);
2275         }
2276
2277 int ssl_undefined_void_function(void)
2278         {
2279         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2280         return(0);
2281         }
2282
2283 int ssl_undefined_const_function(const SSL *s)
2284         {
2285         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2286         return(0);
2287         }
2288
2289 SSL_METHOD *ssl_bad_method(int ver)
2290         {
2291         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2292         return(NULL);
2293         }
2294
2295 const char *SSL_get_version(const SSL *s)
2296         {
2297         if (s->version == TLS1_VERSION)
2298                 return("TLSv1");
2299         else if (s->version == SSL3_VERSION)
2300                 return("SSLv3");
2301         else if (s->version == SSL2_VERSION)
2302                 return("SSLv2");
2303         else
2304                 return("unknown");
2305         }
2306
2307 SSL *SSL_dup(SSL *s)
2308         {
2309         STACK_OF(X509_NAME) *sk;
2310         X509_NAME *xn;
2311         SSL *ret;
2312         int i;
2313
2314         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2315             return(NULL);
2316
2317         ret->version = s->version;
2318         ret->type = s->type;
2319         ret->method = s->method;
2320
2321         if (s->session != NULL)
2322                 {
2323                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2324                 SSL_copy_session_id(ret,s);
2325                 }
2326         else
2327                 {
2328                 /* No session has been established yet, so we have to expect
2329                  * that s->cert or ret->cert will be changed later --
2330                  * they should not both point to the same object,
2331                  * and thus we can't use SSL_copy_session_id. */
2332
2333                 ret->method->ssl_free(ret);
2334                 ret->method = s->method;
2335                 ret->method->ssl_new(ret);
2336
2337                 if (s->cert != NULL)
2338                         {
2339                         if (ret->cert != NULL)
2340                                 {
2341                                 ssl_cert_free(ret->cert);
2342                                 }
2343                         ret->cert = ssl_cert_dup(s->cert);
2344                         if (ret->cert == NULL)
2345                                 goto err;
2346                         }
2347
2348                 SSL_set_session_id_context(ret,
2349                         s->sid_ctx, s->sid_ctx_length);
2350                 }
2351
2352         ret->options=s->options;
2353         ret->mode=s->mode;
2354         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2355         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2356         ret->msg_callback = s->msg_callback;
2357         ret->msg_callback_arg = s->msg_callback_arg;
2358         SSL_set_verify(ret,SSL_get_verify_mode(s),
2359                 SSL_get_verify_callback(s));
2360         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2361         ret->generate_session_id = s->generate_session_id;
2362
2363         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2364
2365         ret->debug=s->debug;
2366
2367         /* copy app data, a little dangerous perhaps */
2368         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2369                 goto err;
2370
2371         /* setup rbio, and wbio */
2372         if (s->rbio != NULL)
2373                 {
2374                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2375                         goto err;
2376                 }
2377         if (s->wbio != NULL)
2378                 {
2379                 if (s->wbio != s->rbio)
2380                         {
2381                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2382                                 goto err;
2383                         }
2384                 else
2385                         ret->wbio=ret->rbio;
2386                 }
2387         ret->rwstate = s->rwstate;
2388         ret->in_handshake = s->in_handshake;
2389         ret->handshake_func = s->handshake_func;
2390         ret->server = s->server;
2391         ret->new_session = s->new_session;
2392         ret->quiet_shutdown = s->quiet_shutdown;
2393         ret->shutdown=s->shutdown;
2394         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2395         ret->rstate=s->rstate;
2396         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2397         ret->hit=s->hit;
2398
2399         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2400
2401         /* dup the cipher_list and cipher_list_by_id stacks */
2402         if (s->cipher_list != NULL)
2403                 {
2404                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2405                         goto err;
2406                 }
2407         if (s->cipher_list_by_id != NULL)
2408                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2409                         == NULL)
2410                         goto err;
2411
2412         /* Dup the client_CA list */
2413         if (s->client_CA != NULL)
2414                 {
2415                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2416                 ret->client_CA=sk;
2417                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2418                         {
2419                         xn=sk_X509_NAME_value(sk,i);
2420                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2421                                 {
2422                                 X509_NAME_free(xn);
2423                                 goto err;
2424                                 }
2425                         }
2426                 }
2427
2428         if (0)
2429                 {
2430 err:
2431                 if (ret != NULL) SSL_free(ret);
2432                 ret=NULL;
2433                 }
2434         return(ret);
2435         }
2436
2437 void ssl_clear_cipher_ctx(SSL *s)
2438         {
2439         if (s->enc_read_ctx != NULL)
2440                 {
2441                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2442                 OPENSSL_free(s->enc_read_ctx);
2443                 s->enc_read_ctx=NULL;
2444                 }
2445         if (s->enc_write_ctx != NULL)
2446                 {
2447                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2448                 OPENSSL_free(s->enc_write_ctx);
2449                 s->enc_write_ctx=NULL;
2450                 }
2451 #ifndef OPENSSL_NO_COMP
2452         if (s->expand != NULL)
2453                 {
2454                 COMP_CTX_free(s->expand);
2455                 s->expand=NULL;
2456                 }
2457         if (s->compress != NULL)
2458                 {
2459                 COMP_CTX_free(s->compress);
2460                 s->compress=NULL;
2461                 }
2462 #endif
2463         }
2464
2465 /* Fix this function so that it takes an optional type parameter */
2466 X509 *SSL_get_certificate(const SSL *s)
2467         {
2468         if (s->cert != NULL)
2469                 return(s->cert->key->x509);
2470         else
2471                 return(NULL);
2472         }
2473
2474 /* Fix this function so that it takes an optional type parameter */
2475 EVP_PKEY *SSL_get_privatekey(SSL *s)
2476         {
2477         if (s->cert != NULL)
2478                 return(s->cert->key->privatekey);
2479         else
2480                 return(NULL);
2481         }
2482
2483 SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2484         {
2485         if ((s->session != NULL) && (s->session->cipher != NULL))
2486                 return(s->session->cipher);
2487         return(NULL);
2488         }
2489 #ifdef OPENSSL_NO_COMP
2490 const void *SSL_get_current_compression(SSL *s)
2491         {
2492         return NULL;
2493         }
2494 const void *SSL_get_current_expansion(SSL *s)
2495         {
2496         return NULL;
2497         }
2498 #else
2499
2500 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2501         {
2502         if (s->compress != NULL)
2503                 return(s->compress->meth);
2504         return(NULL);
2505         }
2506
2507 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2508         {
2509         if (s->expand != NULL)
2510                 return(s->expand->meth);
2511         return(NULL);
2512         }
2513 #endif
2514
2515 int ssl_init_wbio_buffer(SSL *s,int push)
2516         {
2517         BIO *bbio;
2518
2519         if (s->bbio == NULL)
2520                 {
2521                 bbio=BIO_new(BIO_f_buffer());
2522                 if (bbio == NULL) return(0);
2523                 s->bbio=bbio;
2524                 }
2525         else
2526                 {
2527                 bbio=s->bbio;
2528                 if (s->bbio == s->wbio)
2529                         s->wbio=BIO_pop(s->wbio);
2530                 }
2531         (void)BIO_reset(bbio);
2532 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2533         if (!BIO_set_read_buffer_size(bbio,1))
2534                 {
2535                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2536                 return(0);
2537                 }
2538         if (push)
2539                 {
2540                 if (s->wbio != bbio)
2541                         s->wbio=BIO_push(bbio,s->wbio);
2542                 }
2543         else
2544                 {
2545                 if (s->wbio == bbio)
2546                         s->wbio=BIO_pop(bbio);
2547                 }
2548         return(1);
2549         }
2550
2551 void ssl_free_wbio_buffer(SSL *s)
2552         {
2553         if (s->bbio == NULL) return;
2554
2555         if (s->bbio == s->wbio)
2556                 {
2557                 /* remove buffering */
2558                 s->wbio=BIO_pop(s->wbio);
2559 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2560                 assert(s->wbio != NULL);
2561 #endif
2562         }
2563         BIO_free(s->bbio);
2564         s->bbio=NULL;
2565         }
2566
2567 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2568         {
2569         ctx->quiet_shutdown=mode;
2570         }
2571
2572 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2573         {
2574         return(ctx->quiet_shutdown);
2575         }
2576
2577 void SSL_set_quiet_shutdown(SSL *s,int mode)
2578         {
2579         s->quiet_shutdown=mode;
2580         }
2581
2582 int SSL_get_quiet_shutdown(const SSL *s)
2583         {
2584         return(s->quiet_shutdown);
2585         }
2586
2587 void SSL_set_shutdown(SSL *s,int mode)
2588         {
2589         s->shutdown=mode;
2590         }
2591
2592 int SSL_get_shutdown(const SSL *s)
2593         {
2594         return(s->shutdown);
2595         }
2596
2597 int SSL_version(const SSL *s)
2598         {
2599         return(s->version);
2600         }
2601
2602 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2603         {
2604         return(ssl->ctx);
2605         }
2606
2607 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2608         {
2609         if (ssl->ctx == ctx)
2610                 return ssl->ctx;
2611 #ifndef OPENSSL_NO_TLSEXT
2612         if (ctx == NULL)
2613                 ctx = ssl->initial_ctx;
2614 #endif
2615         if (ssl->cert != NULL)
2616                 ssl_cert_free(ssl->cert);
2617         ssl->cert = ssl_cert_dup(ctx->cert);
2618         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2619         if (ssl->ctx != NULL)
2620                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2621         ssl->ctx = ctx;
2622         return(ssl->ctx);
2623         }
2624
2625 #ifndef OPENSSL_NO_STDIO
2626 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2627         {
2628         return(X509_STORE_set_default_paths(ctx->cert_store));
2629         }
2630
2631 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2632                 const char *CApath)
2633         {
2634         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2635         }
2636 #endif
2637
2638 void SSL_set_info_callback(SSL *ssl,
2639         void (*cb)(const SSL *ssl,int type,int val))
2640         {
2641         ssl->info_callback=cb;
2642         }
2643
2644 /* One compiler (Diab DCC) doesn't like argument names in returned
2645    function pointer.  */
2646 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2647         {
2648         return ssl->info_callback;
2649         }
2650
2651 int SSL_state(const SSL *ssl)
2652         {
2653         return(ssl->state);
2654         }
2655
2656 void SSL_set_verify_result(SSL *ssl,long arg)
2657         {
2658         ssl->verify_result=arg;
2659         }
2660
2661 long SSL_get_verify_result(const SSL *ssl)
2662         {
2663         return(ssl->verify_result);
2664         }
2665
2666 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2667                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2668         {
2669         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2670                                 new_func, dup_func, free_func);
2671         }
2672
2673 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2674         {
2675         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2676         }
2677
2678 void *SSL_get_ex_data(const SSL *s,int idx)
2679         {
2680         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2681         }
2682
2683 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2684                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2685         {
2686         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2687                                 new_func, dup_func, free_func);
2688         }
2689
2690 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2691         {
2692         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2693         }
2694
2695 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2696         {
2697         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2698         }
2699
2700 int ssl_ok(SSL *s)
2701         {
2702         return(1);
2703         }
2704
2705 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2706         {
2707         return(ctx->cert_store);
2708         }
2709
2710 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2711         {
2712         if (ctx->cert_store != NULL)
2713                 X509_STORE_free(ctx->cert_store);
2714         ctx->cert_store=store;
2715         }
2716
2717 int SSL_want(const SSL *s)
2718         {
2719         return(s->rwstate);
2720         }
2721
2722 /*!
2723  * \brief Set the callback for generating temporary RSA keys.
2724  * \param ctx the SSL context.
2725  * \param cb the callback
2726  */
2727
2728 #ifndef OPENSSL_NO_RSA
2729 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2730                                                           int is_export,
2731                                                           int keylength))
2732     {
2733     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2734     }
2735
2736 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2737                                                   int is_export,
2738                                                   int keylength))
2739     {
2740     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2741     }
2742 #endif
2743
2744 #ifdef DOXYGEN
2745 /*!
2746  * \brief The RSA temporary key callback function.
2747  * \param ssl the SSL session.
2748  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2749  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2750  * of the required key in bits.
2751  * \return the temporary RSA key.
2752  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2753  */
2754
2755 RSA *cb(SSL *ssl,int is_export,int keylength)
2756     {}
2757 #endif
2758
2759 /*!
2760  * \brief Set the callback for generating temporary DH keys.
2761  * \param ctx the SSL context.
2762  * \param dh the callback
2763  */
2764
2765 #ifndef OPENSSL_NO_DH
2766 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2767                                                         int keylength))
2768         {
2769         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2770         }
2771
2772 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2773                                                 int keylength))
2774         {
2775         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2776         }
2777 #endif
2778
2779 #ifndef OPENSSL_NO_ECDH
2780 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2781                                                                 int keylength))
2782         {
2783         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2784         }
2785
2786 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2787                                                         int keylength))
2788         {
2789         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2790         }
2791 #endif
2792
2793 #ifndef OPENSSL_NO_PSK
2794 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2795         {
2796         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2797                 {
2798                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2799                 return 0;
2800                 }
2801         if (ctx->psk_identity_hint != NULL)
2802                 OPENSSL_free(ctx->psk_identity_hint);
2803         if (identity_hint != NULL)
2804                 {
2805                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2806                 if (ctx->psk_identity_hint == NULL)
2807                         return 0;
2808                 }
2809         else
2810                 ctx->psk_identity_hint = NULL;
2811         return 1;
2812         }
2813
2814 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2815         {
2816         if (s == NULL)
2817                 return 0;
2818
2819         if (s->session == NULL)
2820                 return 1; /* session not created yet, ignored */
2821
2822         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2823                 {
2824                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2825                 return 0;
2826                 }
2827         if (s->session->psk_identity_hint != NULL)
2828                 OPENSSL_free(s->session->psk_identity_hint);
2829         if (identity_hint != NULL)
2830                 {
2831                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2832                 if (s->session->psk_identity_hint == NULL)
2833                         return 0;
2834                 }
2835         else
2836                 s->session->psk_identity_hint = NULL;
2837         return 1;
2838         }
2839
2840 const char *SSL_get_psk_identity_hint(const SSL *s)
2841         {
2842         if (s == NULL || s->session == NULL)
2843                 return NULL;
2844         return(s->session->psk_identity_hint);
2845         }
2846
2847 const char *SSL_get_psk_identity(const SSL *s)
2848         {
2849         if (s == NULL || s->session == NULL)
2850                 return NULL;
2851         return(s->session->psk_identity);
2852         }
2853
2854 void SSL_set_psk_client_callback(SSL *s,
2855     unsigned int (*cb)(SSL *ssl, const char *hint,
2856                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2857                        unsigned int max_psk_len))
2858         {
2859         s->psk_client_callback = cb;
2860         }
2861
2862 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2863     unsigned int (*cb)(SSL *ssl, const char *hint,
2864                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2865                        unsigned int max_psk_len))
2866         {
2867         ctx->psk_client_callback = cb;
2868         }
2869
2870 void SSL_set_psk_server_callback(SSL *s,
2871     unsigned int (*cb)(SSL *ssl, const char *identity,
2872                        unsigned char *psk, unsigned int max_psk_len))
2873         {
2874         s->psk_server_callback = cb;
2875         }
2876
2877 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2878     unsigned int (*cb)(SSL *ssl, const char *identity,
2879                        unsigned char *psk, unsigned int max_psk_len))
2880         {
2881         ctx->psk_server_callback = cb;
2882         }
2883 #endif
2884
2885 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))
2886         {
2887         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2888         }
2889 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))
2890         {
2891         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2892         }
2893
2894 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2895  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2896  * any. If EVP_MD pointer is passed, initializes ctx with this md
2897  * Returns newly allocated ctx;
2898  */
2899
2900 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
2901 {
2902         ssl_clear_hash_ctx(hash);
2903         *hash = EVP_MD_CTX_create();
2904         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2905         return *hash;
2906 }
2907 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
2908 {
2909
2910         if (*hash) EVP_MD_CTX_destroy(*hash);
2911         *hash=NULL;
2912 }
2913
2914 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2915 #include "../crypto/bio/bss_file.c"
2916 #endif
2917
2918 IMPLEMENT_STACK_OF(SSL_CIPHER)
2919 IMPLEMENT_STACK_OF(SSL_COMP)