ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function
 180         };
 181
 182 int SSL_clear(SSL *s)
 183         {
 184
 185         if (s->method == NULL)
 186                 {
 187                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 188                 return(0);
 189                 }
 190
 191         if (ssl_clear_bad_session(s))
 192                 {
 193                 SSL_SESSION_free(s->session);
 194                 s->session=NULL;
 195                 }
 196
 197         s->error=0;
 198         s->hit=0;
 199         s->shutdown=0;
 200
 201 #if 0 /* Disabled since version 1.10 of this file (early return not
 202        * needed because SSL_clear is not called when doing renegotiation) */
 203         /* This is set if we are doing dynamic renegotiation so keep
 204          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 205         if (s->new_session) return(1);
 206 #else
 207         if (s->new_session)
 208                 {
 209                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 210                 return 0;
 211                 }
 212 #endif
 213
 214         s->type=0;
 215
 216         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 217
 218         s->version=s->method->version;
 219         s->client_version=s->version;
 220         s->rwstate=SSL_NOTHING;
 221         s->rstate=SSL_ST_READ_HEADER;
 222 #if 0
 223         s->read_ahead=s->ctx->read_ahead;
 224 #endif
 225
 226         if (s->init_buf != NULL)
 227                 {
 228                 BUF_MEM_free(s->init_buf);
 229                 s->init_buf=NULL;
 230                 }
 231
 232         ssl_clear_cipher_ctx(s);
 233         ssl_clear_hash_ctx(&s->read_hash);
 234         ssl_clear_hash_ctx(&s->write_hash);
 235
 236         s->first_packet=0;
 237
 238 #if 1
 239         /* Check to see if we were changed into a different method, if
 240          * so, revert back if we are not doing session-id reuse. */
 241         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 242                 {
 243                 s->method->ssl_free(s);
 244                 s->method=s->ctx->method;
 245                 if (!s->method->ssl_new(s))
 246                         return(0);
 247                 }
 248         else
 249 #endif
 250                 s->method->ssl_clear(s);
 251         return(1);
 252         }
 253
 254 /** Used to change an SSL_CTXs default SSL method type */
 255 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 256         {
 257         STACK_OF(SSL_CIPHER) *sk;
 258
 259         ctx->method=meth;
 260
 261         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 262                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 263         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 264                 {
 265                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 266                 return(0);
 267                 }
 268         return(1);
 269         }
 270
 271 SSL *SSL_new(SSL_CTX *ctx)
 272         {
 273         SSL *s;
 274
 275         if (ctx == NULL)
 276                 {
 277                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 278                 return(NULL);
 279                 }
 280         if (ctx->method == NULL)
 281                 {
 282                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 283                 return(NULL);
 284                 }
 285
 286         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 287         if (s == NULL) goto err;
 288         memset(s,0,sizeof(SSL));
 289
 290 #ifndef OPENSSL_NO_KRB5
 291         s->kssl_ctx = kssl_ctx_new();
 292 #endif  /* OPENSSL_NO_KRB5 */
 293
 294         s->options=ctx->options;
 295         s->mode=ctx->mode;
 296         s->max_cert_list=ctx->max_cert_list;
 297
 298         if (ctx->cert != NULL)
 299                 {
 300                 /* Earlier library versions used to copy the pointer to
 301                  * the CERT, not its contents; only when setting new
 302                  * parameters for the per-SSL copy, ssl_cert_new would be
 303                  * called (and the direct reference to the per-SSL_CTX
 304                  * settings would be lost, but those still were indirectly
 305                  * accessed for various purposes, and for that reason they
 306                  * used to be known as s->ctx->default_cert).
 307                  * Now we don't look at the SSL_CTX's CERT after having
 308                  * duplicated it once. */
 309
 310                 s->cert = ssl_cert_dup(ctx->cert);
 311                 if (s->cert == NULL)
 312                         goto err;
 313                 }
 314         else
 315                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 316
 317         s->read_ahead=ctx->read_ahead;
 318         s->msg_callback=ctx->msg_callback;
 319         s->msg_callback_arg=ctx->msg_callback_arg;
 320         s->verify_mode=ctx->verify_mode;
 321 #if 0
 322         s->verify_depth=ctx->verify_depth;
 323 #endif
 324         s->sid_ctx_length=ctx->sid_ctx_length;
 325         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 326         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 327         s->verify_callback=ctx->default_verify_callback;
 328         s->generate_session_id=ctx->generate_session_id;
 329
 330         s->param = X509_VERIFY_PARAM_new();
 331         if (!s->param)
 332                 goto err;
 333         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 334 #if 0
 335         s->purpose = ctx->purpose;
 336         s->trust = ctx->trust;
 337 #endif
 338         s->quiet_shutdown=ctx->quiet_shutdown;
 339         s->max_send_fragment = ctx->max_send_fragment;
 340
 341         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 342         s->ctx=ctx;
 343 #ifndef OPENSSL_NO_TLSEXT
 344         s->tlsext_debug_cb = 0;
 345         s->tlsext_debug_arg = NULL;
 346         s->tlsext_ticket_expected = 0;
 347         s->tlsext_status_type = -1;
 348         s->tlsext_status_expected = 0;
 349         s->tlsext_ocsp_ids = NULL;
 350         s->tlsext_ocsp_exts = NULL;
 351         s->tlsext_ocsp_resp = NULL;
 352         s->tlsext_ocsp_resplen = -1;
 353         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 354         s->initial_ctx=ctx;
 355 #endif
 356
 357         s->verify_result=X509_V_OK;
 358
 359         s->method=ctx->method;
 360
 361         if (!s->method->ssl_new(s))
 362                 goto err;
 363
 364         s->references=1;
 365         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 366
 367         SSL_clear(s);
 368
 369         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 370
 371 #ifndef OPENSSL_NO_PSK
 372         s->psk_client_callback=ctx->psk_client_callback;
 373         s->psk_server_callback=ctx->psk_server_callback;
 374 #endif
 375
 376         return(s);
 377 err:
 378         if (s != NULL)
 379                 {
 380                 if (s->cert != NULL)
 381                         ssl_cert_free(s->cert);
 382                 if (s->ctx != NULL)
 383                         SSL_CTX_free(s->ctx); /* decrement reference count */
 384                 OPENSSL_free(s);
 385                 }
 386         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 387         return(NULL);
 388         }
 389
 390 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 391                                    unsigned int sid_ctx_len)
 392     {
 393     if(sid_ctx_len > sizeof ctx->sid_ctx)
 394         {
 395         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 396         return 0;
 397         }
 398     ctx->sid_ctx_length=sid_ctx_len;
 399     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 400
 401     return 1;
 402     }
 403
 404 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 405                                unsigned int sid_ctx_len)
 406     {
 407     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 408         {
 409         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 410         return 0;
 411         }
 412     ssl->sid_ctx_length=sid_ctx_len;
 413     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 414
 415     return 1;
 416     }
 417
 418 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 419         {
 420         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 421         ctx->generate_session_id = cb;
 422         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 423         return 1;
 424         }
 425
 426 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 427         {
 428         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 429         ssl->generate_session_id = cb;
 430         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 431         return 1;
 432         }
 433
 434 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 435                                 unsigned int id_len)
 436         {
 437         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 438          * we can "construct" a session to give us the desired check - ie. to
 439          * find if there's a session in the hash table that would conflict with
 440          * any new session built out of this id/id_len and the ssl_version in
 441          * use by this SSL. */
 442         SSL_SESSION r, *p;
 443
 444         if(id_len > sizeof r.session_id)
 445                 return 0;
 446
 447         r.ssl_version = ssl->version;
 448         r.session_id_length = id_len;
 449         memcpy(r.session_id, id, id_len);
 450         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 451          * callback is calling us to check the uniqueness of a shorter ID, it
 452          * must be compared as a padded-out ID because that is what it will be
 453          * converted to when the callback has finished choosing it. */
 454         if((r.ssl_version == SSL2_VERSION) &&
 455                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 456                 {
 457                 memset(r.session_id + id_len, 0,
 458                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 459                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 460                 }
 461
 462         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 463         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 464         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 465         return (p != NULL);
 466         }
 467
 468 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 469         {
 470         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 471         }
 472
 473 int SSL_set_purpose(SSL *s, int purpose)
 474         {
 475         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 476         }
 477
 478 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 479         {
 480         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 481         }
 482
 483 int SSL_set_trust(SSL *s, int trust)
 484         {
 485         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 486         }
 487
 488 void SSL_free(SSL *s)
 489         {
 490         int i;
 491
 492         if(s == NULL)
 493             return;
 494
 495         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 496 #ifdef REF_PRINT
 497         REF_PRINT("SSL",s);
 498 #endif
 499         if (i > 0) return;
 500 #ifdef REF_CHECK
 501         if (i < 0)
 502                 {
 503                 fprintf(stderr,"SSL_free, bad reference count\n");
 504                 abort(); /* ok */
 505                 }
 506 #endif
 507
 508         if (s->param)
 509                 X509_VERIFY_PARAM_free(s->param);
 510
 511         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 512
 513         if (s->bbio != NULL)
 514                 {
 515                 /* If the buffering BIO is in place, pop it off */
 516                 if (s->bbio == s->wbio)
 517                         {
 518                         s->wbio=BIO_pop(s->wbio);
 519                         }
 520                 BIO_free(s->bbio);
 521                 s->bbio=NULL;
 522                 }
 523         if (s->rbio != NULL)
 524                 BIO_free_all(s->rbio);
 525         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 526                 BIO_free_all(s->wbio);
 527
 528         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 529
 530         /* add extra stuff */
 531         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 532         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 533
 534         /* Make the next call work :-) */
 535         if (s->session != NULL)
 536                 {
 537                 ssl_clear_bad_session(s);
 538                 SSL_SESSION_free(s->session);
 539                 }
 540
 541         ssl_clear_cipher_ctx(s);
 542         ssl_clear_hash_ctx(&s->read_hash);
 543         ssl_clear_hash_ctx(&s->write_hash);
 544
 545         if (s->cert != NULL) ssl_cert_free(s->cert);
 546         /* Free up if allocated */
 547
 548         if (s->ctx) SSL_CTX_free(s->ctx);
 549 #ifndef OPENSSL_NO_TLSEXT
 550         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 551 #ifndef OPENSSL_NO_EC
 552         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 553         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 554 #endif /* OPENSSL_NO_EC */
 555         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 556         if (s->tlsext_ocsp_exts)
 557                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 558                                                 X509_EXTENSION_free);
 559         if (s->tlsext_ocsp_ids)
 560                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 561         if (s->tlsext_ocsp_resp)
 562                 OPENSSL_free(s->tlsext_ocsp_resp);
 563 #endif
 564
 565         if (s->client_CA != NULL)
 566                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 567
 568         if (s->method != NULL) s->method->ssl_free(s);
 569
 570 #ifndef OPENSSL_NO_KRB5
 571         if (s->kssl_ctx != NULL)
 572                 kssl_ctx_free(s->kssl_ctx);
 573 #endif  /* OPENSSL_NO_KRB5 */
 574
 575         OPENSSL_free(s);
 576         }
 577
 578 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 579         {
 580         /* If the output buffering BIO is still in place, remove it
 581          */
 582         if (s->bbio != NULL)
 583                 {
 584                 if (s->wbio == s->bbio)
 585                         {
 586                         s->wbio=s->wbio->next_bio;
 587                         s->bbio->next_bio=NULL;
 588                         }
 589                 }
 590         if ((s->rbio != NULL) && (s->rbio != rbio))
 591                 BIO_free_all(s->rbio);
 592         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 593                 BIO_free_all(s->wbio);
 594         s->rbio=rbio;
 595         s->wbio=wbio;
 596         }
 597
 598 BIO *SSL_get_rbio(const SSL *s)
 599         { return(s->rbio); }
 600
 601 BIO *SSL_get_wbio(const SSL *s)
 602         { return(s->wbio); }
 603
 604 int SSL_get_fd(const SSL *s)
 605         {
 606         return(SSL_get_rfd(s));
 607         }
 608
 609 int SSL_get_rfd(const SSL *s)
 610         {
 611         int ret= -1;
 612         BIO *b,*r;
 613
 614         b=SSL_get_rbio(s);
 615         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 616         if (r != NULL)
 617                 BIO_get_fd(r,&ret);
 618         return(ret);
 619         }
 620
 621 int SSL_get_wfd(const SSL *s)
 622         {
 623         int ret= -1;
 624         BIO *b,*r;
 625
 626         b=SSL_get_wbio(s);
 627         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 628         if (r != NULL)
 629                 BIO_get_fd(r,&ret);
 630         return(ret);
 631         }
 632
 633 #ifndef OPENSSL_NO_SOCK
 634 int SSL_set_fd(SSL *s,int fd)
 635         {
 636         int ret=0;
 637         BIO *bio=NULL;
 638
 639         bio=BIO_new(BIO_s_socket());
 640
 641         if (bio == NULL)
 642                 {
 643                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 644                 goto err;
 645                 }
 646         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 647         SSL_set_bio(s,bio,bio);
 648         ret=1;
 649 err:
 650         return(ret);
 651         }
 652
 653 int SSL_set_wfd(SSL *s,int fd)
 654         {
 655         int ret=0;
 656         BIO *bio=NULL;
 657
 658         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 659                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 660                 {
 661                 bio=BIO_new(BIO_s_socket());
 662
 663                 if (bio == NULL)
 664                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 665                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 666                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 667                 }
 668         else
 669                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 670         ret=1;
 671 err:
 672         return(ret);
 673         }
 674
 675 int SSL_set_rfd(SSL *s,int fd)
 676         {
 677         int ret=0;
 678         BIO *bio=NULL;
 679
 680         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 681                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 682                 {
 683                 bio=BIO_new(BIO_s_socket());
 684
 685                 if (bio == NULL)
 686                         {
 687                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 688                         goto err;
 689                         }
 690                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 691                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 692                 }
 693         else
 694                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 695         ret=1;
 696 err:
 697         return(ret);
 698         }
 699 #endif
 700
 701
 702 /* return length of latest Finished message we sent, copy to 'buf' */
 703 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 704         {
 705         size_t ret = 0;
 706
 707         if (s->s3 != NULL)
 708                 {
 709                 ret = s->s3->tmp.finish_md_len;
 710                 if (count > ret)
 711                         count = ret;
 712                 memcpy(buf, s->s3->tmp.finish_md, count);
 713                 }
 714         return ret;
 715         }
 716
 717 /* return length of latest Finished message we expected, copy to 'buf' */
 718 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 719         {
 720         size_t ret = 0;
 721
 722         if (s->s3 != NULL)
 723                 {
 724                 ret = s->s3->tmp.peer_finish_md_len;
 725                 if (count > ret)
 726                         count = ret;
 727                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 728                 }
 729         return ret;
 730         }
 731
 732
 733 int SSL_get_verify_mode(const SSL *s)
 734         {
 735         return(s->verify_mode);
 736         }
 737
 738 int SSL_get_verify_depth(const SSL *s)
 739         {
 740         return X509_VERIFY_PARAM_get_depth(s->param);
 741         }
 742
 743 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 744         {
 745         return(s->verify_callback);
 746         }
 747
 748 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 749         {
 750         return(ctx->verify_mode);
 751         }
 752
 753 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 754         {
 755         return X509_VERIFY_PARAM_get_depth(ctx->param);
 756         }
 757
 758 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 759         {
 760         return(ctx->default_verify_callback);
 761         }
 762
 763 void SSL_set_verify(SSL *s,int mode,
 764                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 765         {
 766         s->verify_mode=mode;
 767         if (callback != NULL)
 768                 s->verify_callback=callback;
 769         }
 770
 771 void SSL_set_verify_depth(SSL *s,int depth)
 772         {
 773         X509_VERIFY_PARAM_set_depth(s->param, depth);
 774         }
 775
 776 void SSL_set_read_ahead(SSL *s,int yes)
 777         {
 778         s->read_ahead=yes;
 779         }
 780
 781 int SSL_get_read_ahead(const SSL *s)
 782         {
 783         return(s->read_ahead);
 784         }
 785
 786 int SSL_pending(const SSL *s)
 787         {
 788         /* SSL_pending cannot work properly if read-ahead is enabled
 789          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 790          * and it is impossible to fix since SSL_pending cannot report
 791          * errors that may be observed while scanning the new data.
 792          * (Note that SSL_pending() is often used as a boolean value,
 793          * so we'd better not return -1.)
 794          */
 795         return(s->method->ssl_pending(s));
 796         }
 797
 798 X509 *SSL_get_peer_certificate(const SSL *s)
 799         {
 800         X509 *r;
 801
 802         if ((s == NULL) || (s->session == NULL))
 803                 r=NULL;
 804         else
 805                 r=s->session->peer;
 806
 807         if (r == NULL) return(r);
 808
 809         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 810
 811         return(r);
 812         }
 813
 814 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 815         {
 816         STACK_OF(X509) *r;
 817
 818         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 819                 r=NULL;
 820         else
 821                 r=s->session->sess_cert->cert_chain;
 822
 823         /* If we are a client, cert_chain includes the peer's own
 824          * certificate; if we are a server, it does not. */
 825
 826         return(r);
 827         }
 828
 829 /* Now in theory, since the calling process own 't' it should be safe to
 830  * modify.  We need to be able to read f without being hassled */
 831 void SSL_copy_session_id(SSL *t,const SSL *f)
 832         {
 833         CERT *tmp;
 834
 835         /* Do we need to to SSL locking? */
 836         SSL_set_session(t,SSL_get_session(f));
 837
 838         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 839          * vice-versa */
 840         if (t->method != f->method)
 841                 {
 842                 t->method->ssl_free(t); /* cleanup current */
 843                 t->method=f->method;    /* change method */
 844                 t->method->ssl_new(t);  /* setup new */
 845                 }
 846
 847         tmp=t->cert;
 848         if (f->cert != NULL)
 849                 {
 850                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 851                 t->cert=f->cert;
 852                 }
 853         else
 854                 t->cert=NULL;
 855         if (tmp != NULL) ssl_cert_free(tmp);
 856         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 857         }
 858
 859 /* Fix this so it checks all the valid key/cert options */
 860 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 861         {
 862         if (    (ctx == NULL) ||
 863                 (ctx->cert == NULL) ||
 864                 (ctx->cert->key->x509 == NULL))
 865                 {
 866                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 867                 return(0);
 868                 }
 869         if      (ctx->cert->key->privatekey == NULL)
 870                 {
 871                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 872                 return(0);
 873                 }
 874         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 875         }
 876
 877 /* Fix this function so that it takes an optional type parameter */
 878 int SSL_check_private_key(const SSL *ssl)
 879         {
 880         if (ssl == NULL)
 881                 {
 882                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 883                 return(0);
 884                 }
 885         if (ssl->cert == NULL)
 886                 {
 887                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 888                 return 0;
 889                 }
 890         if (ssl->cert->key->x509 == NULL)
 891                 {
 892                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 893                 return(0);
 894                 }
 895         if (ssl->cert->key->privatekey == NULL)
 896                 {
 897                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 898                 return(0);
 899                 }
 900         return(X509_check_private_key(ssl->cert->key->x509,
 901                 ssl->cert->key->privatekey));
 902         }
 903
 904 int SSL_accept(SSL *s)
 905         {
 906         if (s->handshake_func == 0)
 907                 /* Not properly initialized yet */
 908                 SSL_set_accept_state(s);
 909
 910         return(s->method->ssl_accept(s));
 911         }
 912
 913 int SSL_connect(SSL *s)
 914         {
 915         if (s->handshake_func == 0)
 916                 /* Not properly initialized yet */
 917                 SSL_set_connect_state(s);
 918
 919         return(s->method->ssl_connect(s));
 920         }
 921
 922 long SSL_get_default_timeout(const SSL *s)
 923         {
 924         return(s->method->get_timeout());
 925         }
 926
 927 int SSL_read(SSL *s,void *buf,int num)
 928         {
 929         if (s->handshake_func == 0)
 930                 {
 931                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 932                 return -1;
 933                 }
 934
 935         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 936                 {
 937                 s->rwstate=SSL_NOTHING;
 938                 return(0);
 939                 }
 940         return(s->method->ssl_read(s,buf,num));
 941         }
 942
 943 int SSL_peek(SSL *s,void *buf,int num)
 944         {
 945         if (s->handshake_func == 0)
 946                 {
 947                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 948                 return -1;
 949                 }
 950
 951         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 952                 {
 953                 return(0);
 954                 }
 955         return(s->method->ssl_peek(s,buf,num));
 956         }
 957
 958 int SSL_write(SSL *s,const void *buf,int num)
 959         {
 960         if (s->handshake_func == 0)
 961                 {
 962                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 963                 return -1;
 964                 }
 965
 966         if (s->shutdown & SSL_SENT_SHUTDOWN)
 967                 {
 968                 s->rwstate=SSL_NOTHING;
 969                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 970                 return(-1);
 971                 }
 972         return(s->method->ssl_write(s,buf,num));
 973         }
 974
 975 int SSL_shutdown(SSL *s)
 976         {
 977         /* Note that this function behaves differently from what one might
 978          * expect.  Return values are 0 for no success (yet),
 979          * 1 for success; but calling it once is usually not enough,
 980          * even if blocking I/O is used (see ssl3_shutdown).
 981          */
 982
 983         if (s->handshake_func == 0)
 984                 {
 985                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 986                 return -1;
 987                 }
 988
 989         if ((s != NULL) && !SSL_in_init(s))
 990                 return(s->method->ssl_shutdown(s));
 991         else
 992                 return(1);
 993         }
 994
 995 int SSL_renegotiate(SSL *s)
 996         {
 997         if (s->new_session == 0)
 998                 {
 999                 s->new_session=1;
1000                 }
1001         return(s->method->ssl_renegotiate(s));
1002         }
1003
1004 int SSL_renegotiate_pending(SSL *s)
1005         {
1006         /* becomes true when negotiation is requested;
1007          * false again once a handshake has finished */
1008         return (s->new_session != 0);
1009         }
1010
1011 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1012         {
1013         long l;
1014
1015         switch (cmd)
1016                 {
1017         case SSL_CTRL_GET_READ_AHEAD:
1018                 return(s->read_ahead);
1019         case SSL_CTRL_SET_READ_AHEAD:
1020                 l=s->read_ahead;
1021                 s->read_ahead=larg;
1022                 return(l);
1023
1024         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1025                 s->msg_callback_arg = parg;
1026                 return 1;
1027
1028         case SSL_CTRL_OPTIONS:
1029                 return(s->options|=larg);
1030         case SSL_CTRL_MODE:
1031                 return(s->mode|=larg);
1032         case SSL_CTRL_GET_MAX_CERT_LIST:
1033                 return(s->max_cert_list);
1034         case SSL_CTRL_SET_MAX_CERT_LIST:
1035                 l=s->max_cert_list;
1036                 s->max_cert_list=larg;
1037                 return(l);
1038         case SSL_CTRL_SET_MTU:
1039                 if (SSL_version(s) == DTLS1_VERSION)
1040                         {
1041                         s->d1->mtu = larg;
1042                         return larg;
1043                         }
1044                 return 0;
1045         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1046                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1047                         return 0;
1048                 s->max_send_fragment = larg;
1049                 return 1;
1050         default:
1051                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1052                 }
1053         }
1054
1055 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1056         {
1057         switch(cmd)
1058                 {
1059         case SSL_CTRL_SET_MSG_CALLBACK:
1060                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1061                 return 1;
1062
1063         default:
1064                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1065                 }
1066         }
1067
1068 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1069         {
1070         return ctx->sessions;
1071         }
1072
1073 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1074         {
1075         long l;
1076
1077         switch (cmd)
1078                 {
1079         case SSL_CTRL_GET_READ_AHEAD:
1080                 return(ctx->read_ahead);
1081         case SSL_CTRL_SET_READ_AHEAD:
1082                 l=ctx->read_ahead;
1083                 ctx->read_ahead=larg;
1084                 return(l);
1085
1086         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1087                 ctx->msg_callback_arg = parg;
1088                 return 1;
1089
1090         case SSL_CTRL_GET_MAX_CERT_LIST:
1091                 return(ctx->max_cert_list);
1092         case SSL_CTRL_SET_MAX_CERT_LIST:
1093                 l=ctx->max_cert_list;
1094                 ctx->max_cert_list=larg;
1095                 return(l);
1096
1097         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1098                 l=ctx->session_cache_size;
1099                 ctx->session_cache_size=larg;
1100                 return(l);
1101         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1102                 return(ctx->session_cache_size);
1103         case SSL_CTRL_SET_SESS_CACHE_MODE:
1104                 l=ctx->session_cache_mode;
1105                 ctx->session_cache_mode=larg;
1106                 return(l);
1107         case SSL_CTRL_GET_SESS_CACHE_MODE:
1108                 return(ctx->session_cache_mode);
1109
1110         case SSL_CTRL_SESS_NUMBER:
1111                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1112         case SSL_CTRL_SESS_CONNECT:
1113                 return(ctx->stats.sess_connect);
1114         case SSL_CTRL_SESS_CONNECT_GOOD:
1115                 return(ctx->stats.sess_connect_good);
1116         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1117                 return(ctx->stats.sess_connect_renegotiate);
1118         case SSL_CTRL_SESS_ACCEPT:
1119                 return(ctx->stats.sess_accept);
1120         case SSL_CTRL_SESS_ACCEPT_GOOD:
1121                 return(ctx->stats.sess_accept_good);
1122         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1123                 return(ctx->stats.sess_accept_renegotiate);
1124         case SSL_CTRL_SESS_HIT:
1125                 return(ctx->stats.sess_hit);
1126         case SSL_CTRL_SESS_CB_HIT:
1127                 return(ctx->stats.sess_cb_hit);
1128         case SSL_CTRL_SESS_MISSES:
1129                 return(ctx->stats.sess_miss);
1130         case SSL_CTRL_SESS_TIMEOUTS:
1131                 return(ctx->stats.sess_timeout);
1132         case SSL_CTRL_SESS_CACHE_FULL:
1133                 return(ctx->stats.sess_cache_full);
1134         case SSL_CTRL_OPTIONS:
1135                 return(ctx->options|=larg);
1136         case SSL_CTRL_MODE:
1137                 return(ctx->mode|=larg);
1138         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1139                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1140                         return 0;
1141                 ctx->max_send_fragment = larg;
1142                 return 1;
1143         default:
1144                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1145                 }
1146         }
1147
1148 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1149         {
1150         switch(cmd)
1151                 {
1152         case SSL_CTRL_SET_MSG_CALLBACK:
1153                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1154                 return 1;
1155
1156         default:
1157                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1158                 }
1159         }
1160
1161 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1162         {
1163         long l;
1164
1165         l=a->id-b->id;
1166         if (l == 0L)
1167                 return(0);
1168         else
1169                 return((l > 0)?1:-1);
1170         }
1171
1172 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1173                         const SSL_CIPHER * const *bp)
1174         {
1175         long l;
1176
1177         l=(*ap)->id-(*bp)->id;
1178         if (l == 0L)
1179                 return(0);
1180         else
1181                 return((l > 0)?1:-1);
1182         }
1183
1184 /** return a STACK of the ciphers available for the SSL and in order of
1185  * preference */
1186 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1187         {
1188         if (s != NULL)
1189                 {
1190                 if (s->cipher_list != NULL)
1191                         {
1192                         return(s->cipher_list);
1193                         }
1194                 else if ((s->ctx != NULL) &&
1195                         (s->ctx->cipher_list != NULL))
1196                         {
1197                         return(s->ctx->cipher_list);
1198                         }
1199                 }
1200         return(NULL);
1201         }
1202
1203 /** return a STACK of the ciphers available for the SSL and in order of
1204  * algorithm id */
1205 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1206         {
1207         if (s != NULL)
1208                 {
1209                 if (s->cipher_list_by_id != NULL)
1210                         {
1211                         return(s->cipher_list_by_id);
1212                         }
1213                 else if ((s->ctx != NULL) &&
1214                         (s->ctx->cipher_list_by_id != NULL))
1215                         {
1216                         return(s->ctx->cipher_list_by_id);
1217                         }
1218                 }
1219         return(NULL);
1220         }
1221
1222 /** The old interface to get the same thing as SSL_get_ciphers() */
1223 const char *SSL_get_cipher_list(const SSL *s,int n)
1224         {
1225         SSL_CIPHER *c;
1226         STACK_OF(SSL_CIPHER) *sk;
1227
1228         if (s == NULL) return(NULL);
1229         sk=SSL_get_ciphers(s);
1230         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1231                 return(NULL);
1232         c=sk_SSL_CIPHER_value(sk,n);
1233         if (c == NULL) return(NULL);
1234         return(c->name);
1235         }
1236
1237 /** specify the ciphers to be used by default by the SSL_CTX */
1238 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1239         {
1240         STACK_OF(SSL_CIPHER) *sk;
1241
1242         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1243                 &ctx->cipher_list_by_id,str);
1244         /* ssl_create_cipher_list may return an empty stack if it
1245          * was unable to find a cipher matching the given rule string
1246          * (for example if the rule string specifies a cipher which
1247          * has been disabled). This is not an error as far as
1248          * ssl_create_cipher_list is concerned, and hence
1249          * ctx->cipher_list and ctx->cipher_list_by_id has been
1250          * updated. */
1251         if (sk == NULL)
1252                 return 0;
1253         else if (sk_SSL_CIPHER_num(sk) == 0)
1254                 {
1255                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1256                 return 0;
1257                 }
1258         return 1;
1259         }
1260
1261 /** specify the ciphers to be used by the SSL */
1262 int SSL_set_cipher_list(SSL *s,const char *str)
1263         {
1264         STACK_OF(SSL_CIPHER) *sk;
1265
1266         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1267                 &s->cipher_list_by_id,str);
1268         /* see comment in SSL_CTX_set_cipher_list */
1269         if (sk == NULL)
1270                 return 0;
1271         else if (sk_SSL_CIPHER_num(sk) == 0)
1272                 {
1273                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1274                 return 0;
1275                 }
1276         return 1;
1277         }
1278
1279 /* works well for SSLv2, not so good for SSLv3 */
1280 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1281         {
1282         char *p;
1283         STACK_OF(SSL_CIPHER) *sk;
1284         SSL_CIPHER *c;
1285         int i;
1286
1287         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1288                 (len < 2))
1289                 return(NULL);
1290
1291         p=buf;
1292         sk=s->session->ciphers;
1293         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1294                 {
1295                 int n;
1296
1297                 c=sk_SSL_CIPHER_value(sk,i);
1298                 n=strlen(c->name);
1299                 if (n+1 > len)
1300                         {
1301                         if (p != buf)
1302                                 --p;
1303                         *p='\0';
1304                         return buf;
1305                         }
1306                 strcpy(p,c->name);
1307                 p+=n;
1308                 *(p++)=':';
1309                 len-=n+1;
1310                 }
1311         p[-1]='\0';
1312         return(buf);
1313         }
1314
1315 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1316                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1317         {
1318         int i,j=0;
1319         SSL_CIPHER *c;
1320         unsigned char *q;
1321 #ifndef OPENSSL_NO_KRB5
1322         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1323 #endif /* OPENSSL_NO_KRB5 */
1324
1325         if (sk == NULL) return(0);
1326         q=p;
1327
1328         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1329                 {
1330                 c=sk_SSL_CIPHER_value(sk,i);
1331 #ifndef OPENSSL_NO_KRB5
1332                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1333                     nokrb5)
1334                     continue;
1335 #endif /* OPENSSL_NO_KRB5 */
1336 #ifndef OPENSSL_NO_PSK
1337                 /* with PSK there must be client callback set */
1338                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1339                     s->psk_client_callback == NULL)
1340                         continue;
1341 #endif /* OPENSSL_NO_PSK */
1342                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1343                 p+=j;
1344                 }
1345         return(p-q);
1346         }
1347
1348 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1349                                                STACK_OF(SSL_CIPHER) **skp)
1350         {
1351         SSL_CIPHER *c;
1352         STACK_OF(SSL_CIPHER) *sk;
1353         int i,n;
1354
1355         n=ssl_put_cipher_by_char(s,NULL,NULL);
1356         if ((num%n) != 0)
1357                 {
1358                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1359                 return(NULL);
1360                 }
1361         if ((skp == NULL) || (*skp == NULL))
1362                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1363         else
1364                 {
1365                 sk= *skp;
1366                 sk_SSL_CIPHER_zero(sk);
1367                 }
1368
1369         for (i=0; i<num; i+=n)
1370                 {
1371                 c=ssl_get_cipher_by_char(s,p);
1372                 p+=n;
1373                 if (c != NULL)
1374                         {
1375                         if (!sk_SSL_CIPHER_push(sk,c))
1376                                 {
1377                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1378                                 goto err;
1379                                 }
1380                         }
1381                 }
1382
1383         if (skp != NULL)
1384                 *skp=sk;
1385         return(sk);
1386 err:
1387         if ((skp == NULL) || (*skp == NULL))
1388                 sk_SSL_CIPHER_free(sk);
1389         return(NULL);
1390         }
1391
1392
1393 #ifndef OPENSSL_NO_TLSEXT
1394 /** return a servername extension value if provided in Client Hello, or NULL.
1395  * So far, only host_name types are defined (RFC 3546).
1396  */
1397
1398 const char *SSL_get_servername(const SSL *s, const int type)
1399         {
1400         if (type != TLSEXT_NAMETYPE_host_name)
1401                 return NULL;
1402
1403         return s->session && !s->tlsext_hostname ?
1404                 s->session->tlsext_hostname :
1405                 s->tlsext_hostname;
1406         }
1407
1408 int SSL_get_servername_type(const SSL *s)
1409         {
1410         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1411                 return TLSEXT_NAMETYPE_host_name;
1412         return -1;
1413         }
1414 #endif
1415
1416 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1417         {
1418         unsigned long l;
1419
1420         l=(unsigned long)
1421                 ((unsigned int) a->session_id[0]     )|
1422                 ((unsigned int) a->session_id[1]<< 8L)|
1423                 ((unsigned long)a->session_id[2]<<16L)|
1424                 ((unsigned long)a->session_id[3]<<24L);
1425         return(l);
1426         }
1427
1428 /* NB: If this function (or indeed the hash function which uses a sort of
1429  * coarser function than this one) is changed, ensure
1430  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1431  * able to construct an SSL_SESSION that will collide with any existing session
1432  * with a matching session ID. */
1433 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1434         {
1435         if (a->ssl_version != b->ssl_version)
1436                 return(1);
1437         if (a->session_id_length != b->session_id_length)
1438                 return(1);
1439         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1440         }
1441
1442 /* These wrapper functions should remain rather than redeclaring
1443  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1444  * variable. The reason is that the functions aren't static, they're exposed via
1445  * ssl.h. */
1446 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1447 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1448
1449 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1450         {
1451         SSL_CTX *ret=NULL;
1452
1453         if (meth == NULL)
1454                 {
1455                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1456                 return(NULL);
1457                 }
1458
1459         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1460                 {
1461                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1462                 goto err;
1463                 }
1464         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1465         if (ret == NULL)
1466                 goto err;
1467
1468         memset(ret,0,sizeof(SSL_CTX));
1469
1470         ret->method=meth;
1471
1472         ret->cert_store=NULL;
1473         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1474         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1475         ret->session_cache_head=NULL;
1476         ret->session_cache_tail=NULL;
1477
1478         /* We take the system default */
1479         ret->session_timeout=meth->get_timeout();
1480
1481         ret->new_session_cb=0;
1482         ret->remove_session_cb=0;
1483         ret->get_session_cb=0;
1484         ret->generate_session_id=0;
1485
1486         memset((char *)&ret->stats,0,sizeof(ret->stats));
1487
1488         ret->references=1;
1489         ret->quiet_shutdown=0;
1490
1491 /*      ret->cipher=NULL;*/
1492 /*      ret->s2->challenge=NULL;
1493         ret->master_key=NULL;
1494         ret->key_arg=NULL;
1495         ret->s2->conn_id=NULL; */
1496
1497         ret->info_callback=NULL;
1498
1499         ret->app_verify_callback=0;
1500         ret->app_verify_arg=NULL;
1501
1502         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1503         ret->read_ahead=0;
1504         ret->msg_callback=0;
1505         ret->msg_callback_arg=NULL;
1506         ret->verify_mode=SSL_VERIFY_NONE;
1507 #if 0
1508         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1509 #endif
1510         ret->sid_ctx_length=0;
1511         ret->default_verify_callback=NULL;
1512         if ((ret->cert=ssl_cert_new()) == NULL)
1513                 goto err;
1514
1515         ret->default_passwd_callback=0;
1516         ret->default_passwd_callback_userdata=NULL;
1517         ret->client_cert_cb=0;
1518         ret->app_gen_cookie_cb=0;
1519         ret->app_verify_cookie_cb=0;
1520
1521         ret->sessions=lh_SSL_SESSION_new();
1522         if (ret->sessions == NULL) goto err;
1523         ret->cert_store=X509_STORE_new();
1524         if (ret->cert_store == NULL) goto err;
1525
1526         ssl_create_cipher_list(ret->method,
1527                 &ret->cipher_list,&ret->cipher_list_by_id,
1528                 SSL_DEFAULT_CIPHER_LIST);
1529         if (ret->cipher_list == NULL
1530             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1531                 {
1532                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1533                 goto err2;
1534                 }
1535
1536         ret->param = X509_VERIFY_PARAM_new();
1537         if (!ret->param)
1538                 goto err;
1539
1540         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1541                 {
1542                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1543                 goto err2;
1544                 }
1545         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1546                 {
1547                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1548                 goto err2;
1549                 }
1550         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1551                 {
1552                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1553                 goto err2;
1554                 }
1555
1556         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1557                 goto err;
1558
1559         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1560
1561         ret->extra_certs=NULL;
1562         ret->comp_methods=SSL_COMP_get_compression_methods();
1563
1564         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1565
1566 #ifndef OPENSSL_NO_TLSEXT
1567         ret->tlsext_servername_callback = 0;
1568         ret->tlsext_servername_arg = NULL;
1569         /* Setup RFC4507 ticket keys */
1570         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1571                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1572                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1573                 ret->options |= SSL_OP_NO_TICKET;
1574
1575         ret->tlsext_status_cb = 0;
1576         ret->tlsext_status_arg = NULL;
1577
1578 #endif
1579 #ifndef OPENSSL_NO_PSK
1580         ret->psk_identity_hint=NULL;
1581         ret->psk_client_callback=NULL;
1582         ret->psk_server_callback=NULL;
1583 #endif
1584         return(ret);
1585 err:
1586         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1587 err2:
1588         if (ret != NULL) SSL_CTX_free(ret);
1589         return(NULL);
1590         }
1591
1592 #if 0
1593 static void SSL_COMP_free(SSL_COMP *comp)
1594     { OPENSSL_free(comp); }
1595 #endif
1596
1597 void SSL_CTX_free(SSL_CTX *a)
1598         {
1599         int i;
1600
1601         if (a == NULL) return;
1602
1603         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1604 #ifdef REF_PRINT
1605         REF_PRINT("SSL_CTX",a);
1606 #endif
1607         if (i > 0) return;
1608 #ifdef REF_CHECK
1609         if (i < 0)
1610                 {
1611                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1612                 abort(); /* ok */
1613                 }
1614 #endif
1615
1616         if (a->param)
1617                 X509_VERIFY_PARAM_free(a->param);
1618
1619         /*
1620          * Free internal session cache. However: the remove_cb() may reference
1621          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1622          * after the sessions were flushed.
1623          * As the ex_data handling routines might also touch the session cache,
1624          * the most secure solution seems to be: empty (flush) the cache, then
1625          * free ex_data, then finally free the cache.
1626          * (See ticket [openssl.org #212].)
1627          */
1628         if (a->sessions != NULL)
1629                 SSL_CTX_flush_sessions(a,0);
1630
1631         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1632
1633         if (a->sessions != NULL)
1634                 lh_SSL_SESSION_free(a->sessions);
1635
1636         if (a->cert_store != NULL)
1637                 X509_STORE_free(a->cert_store);
1638         if (a->cipher_list != NULL)
1639                 sk_SSL_CIPHER_free(a->cipher_list);
1640         if (a->cipher_list_by_id != NULL)
1641                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1642         if (a->cert != NULL)
1643                 ssl_cert_free(a->cert);
1644         if (a->client_CA != NULL)
1645                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1646         if (a->extra_certs != NULL)
1647                 sk_X509_pop_free(a->extra_certs,X509_free);
1648 #if 0 /* This should never be done, since it removes a global database */
1649         if (a->comp_methods != NULL)
1650                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1651 #else
1652         a->comp_methods = NULL;
1653 #endif
1654
1655 #ifndef OPENSSL_NO_PSK
1656         if (a->psk_identity_hint)
1657                 OPENSSL_free(a->psk_identity_hint);
1658 #endif
1659 #ifndef OPENSSL_NO_ENGINE
1660         if (a->client_cert_engine)
1661                 ENGINE_finish(a->client_cert_engine);
1662 #endif
1663         OPENSSL_free(a);
1664         }
1665
1666 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1667         {
1668         ctx->default_passwd_callback=cb;
1669         }
1670
1671 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1672         {
1673         ctx->default_passwd_callback_userdata=u;
1674         }
1675
1676 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1677         {
1678         ctx->app_verify_callback=cb;
1679         ctx->app_verify_arg=arg;
1680         }
1681
1682 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1683         {
1684         ctx->verify_mode=mode;
1685         ctx->default_verify_callback=cb;
1686         }
1687
1688 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1689         {
1690         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1691         }
1692
1693 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1694         {
1695         CERT_PKEY *cpk;
1696         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1697         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1698         int rsa_tmp_export,dh_tmp_export,kl;
1699         unsigned long mask_k,mask_a,emask_k,emask_a;
1700         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1701 #ifndef OPENSSL_NO_ECDH
1702         int have_ecdh_tmp;
1703 #endif
1704         X509 *x = NULL;
1705         EVP_PKEY *ecc_pkey = NULL;
1706         int signature_nid = 0;
1707
1708         if (c == NULL) return;
1709
1710         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1711
1712 #ifndef OPENSSL_NO_RSA
1713         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1714         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1715                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1716 #else
1717         rsa_tmp=rsa_tmp_export=0;
1718 #endif
1719 #ifndef OPENSSL_NO_DH
1720         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1721         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1722                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1723 #else
1724         dh_tmp=dh_tmp_export=0;
1725 #endif
1726
1727 #ifndef OPENSSL_NO_ECDH
1728         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1729 #endif
1730         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1731         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1732         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1733         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1734         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1735         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1736         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1737         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1738         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1739         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1740         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1741 /* FIX THIS EAY EAY EAY */
1742         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1743         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1744         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1745         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1746         mask_k=0;
1747         mask_a=0;
1748         emask_k=0;
1749         emask_a=0;
1750
1751
1752
1753 #ifdef CIPHER_DEBUG
1754         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1755                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1756                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1757 #endif
1758
1759         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1760         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1761                 mask_k |= SSL_kGOST;
1762                 mask_a |= SSL_aGOST01;
1763         }
1764         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1765         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1766                 mask_k |= SSL_kGOST;
1767                 mask_a |= SSL_aGOST94;
1768         }
1769
1770         if (rsa_enc || (rsa_tmp && rsa_sign))
1771                 mask_k|=SSL_kRSA;
1772         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1773                 emask_k|=SSL_kRSA;
1774
1775 #if 0
1776         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1777         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1778                 (rsa_enc || rsa_sign || dsa_sign))
1779                 mask_k|=SSL_kEDH;
1780         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1781                 (rsa_enc || rsa_sign || dsa_sign))
1782                 emask_k|=SSL_kEDH;
1783 #endif
1784
1785         if (dh_tmp_export)
1786                 emask_k|=SSL_kEDH;
1787
1788         if (dh_tmp)
1789                 mask_k|=SSL_kEDH;
1790
1791         if (dh_rsa) mask_k|=SSL_kDHr;
1792         if (dh_rsa_export) emask_k|=SSL_kDHr;
1793
1794         if (dh_dsa) mask_k|=SSL_kDHd;
1795         if (dh_dsa_export) emask_k|=SSL_kDHd;
1796
1797         if (rsa_enc || rsa_sign)
1798                 {
1799                 mask_a|=SSL_aRSA;
1800                 emask_a|=SSL_aRSA;
1801                 }
1802
1803         if (dsa_sign)
1804                 {
1805                 mask_a|=SSL_aDSS;
1806                 emask_a|=SSL_aDSS;
1807                 }
1808
1809         mask_a|=SSL_aNULL;
1810         emask_a|=SSL_aNULL;
1811
1812 #ifndef OPENSSL_NO_KRB5
1813         mask_k|=SSL_kKRB5;
1814         mask_a|=SSL_aKRB5;
1815         emask_k|=SSL_kKRB5;
1816         emask_a|=SSL_aKRB5;
1817 #endif
1818
1819         /* An ECC certificate may be usable for ECDH and/or
1820          * ECDSA cipher suites depending on the key usage extension.
1821          */
1822         if (have_ecc_cert)
1823                 {
1824                 /* This call populates extension flags (ex_flags) */
1825                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1826                 X509_check_purpose(x, -1, 0);
1827                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1828                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1829                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1830                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1831                 ecc_pkey = X509_get_pubkey(x);
1832                 ecc_pkey_size = (ecc_pkey != NULL) ?
1833                     EVP_PKEY_bits(ecc_pkey) : 0;
1834                 EVP_PKEY_free(ecc_pkey);
1835                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1836                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1837 #ifndef OPENSSL_NO_ECDH
1838                 if (ecdh_ok)
1839                         {
1840                         const char *sig = OBJ_nid2ln(signature_nid);
1841                         if (sig == NULL)
1842                                 {
1843                                 ERR_clear_error();
1844                                 sig = "unknown";
1845                                 }
1846
1847                         if (strstr(sig, "WithRSA"))
1848                                 {
1849                                 mask_k|=SSL_kECDHr;
1850                                 mask_a|=SSL_aECDH;
1851                                 if (ecc_pkey_size <= 163)
1852                                         {
1853                                         emask_k|=SSL_kECDHr;
1854                                         emask_a|=SSL_aECDH;
1855                                         }
1856                                 }
1857
1858                         if (signature_nid == NID_ecdsa_with_SHA1)
1859                                 {
1860                                 mask_k|=SSL_kECDHe;
1861                                 mask_a|=SSL_aECDH;
1862                                 if (ecc_pkey_size <= 163)
1863                                         {
1864                                         emask_k|=SSL_kECDHe;
1865                                         emask_a|=SSL_aECDH;
1866                                         }
1867                                 }
1868                         }
1869 #endif
1870 #ifndef OPENSSL_NO_ECDSA
1871                 if (ecdsa_ok)
1872                         {
1873                         mask_a|=SSL_aECDSA;
1874                         emask_a|=SSL_aECDSA;
1875                         }
1876 #endif
1877                 }
1878
1879 #ifndef OPENSSL_NO_ECDH
1880         if (have_ecdh_tmp)
1881                 {
1882                 mask_k|=SSL_kEECDH;
1883                 emask_k|=SSL_kEECDH;
1884                 }
1885 #endif
1886
1887 #ifndef OPENSSL_NO_PSK
1888         mask_k |= SSL_kPSK;
1889         mask_a |= SSL_aPSK;
1890         emask_k |= SSL_kPSK;
1891         emask_a |= SSL_aPSK;
1892 #endif
1893
1894         c->mask_k=mask_k;
1895         c->mask_a=mask_a;
1896         c->export_mask_k=emask_k;
1897         c->export_mask_a=emask_a;
1898         c->valid=1;
1899         }
1900
1901 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1902 #define ku_reject(x, usage) \
1903         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1904
1905 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1906         {
1907         unsigned long alg_k, alg_a;
1908         EVP_PKEY *pkey = NULL;
1909         int keysize = 0;
1910         int signature_nid = 0;
1911
1912         alg_k = cs->algorithm_mkey;
1913         alg_a = cs->algorithm_auth;
1914
1915         if (SSL_C_IS_EXPORT(cs))
1916                 {
1917                 /* ECDH key length in export ciphers must be <= 163 bits */
1918                 pkey = X509_get_pubkey(x);
1919                 if (pkey == NULL) return 0;
1920                 keysize = EVP_PKEY_bits(pkey);
1921                 EVP_PKEY_free(pkey);
1922                 if (keysize > 163) return 0;
1923                 }
1924
1925         /* This call populates the ex_flags field correctly */
1926         X509_check_purpose(x, -1, 0);
1927         if ((x->sig_alg) && (x->sig_alg->algorithm))
1928                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1929         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
1930                 {
1931                 /* key usage, if present, must allow key agreement */
1932                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1933                         {
1934                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
1935                         return 0;
1936                         }
1937                 if (alg_k & SSL_kECDHe)
1938                         {
1939                         /* signature alg must be ECDSA */
1940                         if (signature_nid != NID_ecdsa_with_SHA1)
1941                                 {
1942                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
1943                                 return 0;
1944                                 }
1945                         }
1946                 if (alg_k & SSL_kECDHr)
1947                         {
1948                         /* signature alg must be RSA */
1949
1950                         const char *sig = OBJ_nid2ln(signature_nid);
1951                         if (sig == NULL)
1952                                 {
1953                                 ERR_clear_error();
1954                                 sig = "unknown";
1955                                 }
1956                         if (strstr(sig, "WithRSA") == NULL)
1957                                 {
1958                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
1959                                 return 0;
1960                                 }
1961                         }
1962                 }
1963         if (alg_a & SSL_aECDSA)
1964                 {
1965                 /* key usage, if present, must allow signing */
1966                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1967                         {
1968                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
1969                         return 0;
1970                         }
1971                 }
1972
1973         return 1;  /* all checks are ok */
1974         }
1975
1976 /* THIS NEEDS CLEANING UP */
1977 X509 *ssl_get_server_send_cert(SSL *s)
1978         {
1979         unsigned long alg_k,alg_a,mask_k,mask_a;
1980         CERT *c;
1981         int i,is_export;
1982
1983         c=s->cert;
1984         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1985         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1986         if (is_export)
1987                 {
1988                 mask_k = c->export_mask_k;
1989                 mask_a = c->export_mask_a;
1990                 }
1991         else
1992                 {
1993                 mask_k = c->mask_k;
1994                 mask_a = c->mask_a;
1995                 }
1996
1997         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1998         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1999
2000         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2001                 {
2002                 /* we don't need to look at SSL_kEECDH
2003                  * since no certificate is needed for
2004                  * anon ECDH and for authenticated
2005                  * EECDH, the check for the auth
2006                  * algorithm will set i correctly
2007                  * NOTE: For ECDH-RSA, we need an ECC
2008                  * not an RSA cert but for EECDH-RSA
2009                  * we need an RSA cert. Placing the
2010                  * checks for SSL_kECDH before RSA
2011                  * checks ensures the correct cert is chosen.
2012                  */
2013                 i=SSL_PKEY_ECC;
2014                 }
2015         else if (alg_a & SSL_aECDSA)
2016                 {
2017                 i=SSL_PKEY_ECC;
2018                 }
2019         else if (alg_k & SSL_kDHr)
2020                 i=SSL_PKEY_DH_RSA;
2021         else if (alg_k & SSL_kDHd)
2022                 i=SSL_PKEY_DH_DSA;
2023         else if (alg_a & SSL_aDSS)
2024                 i=SSL_PKEY_DSA_SIGN;
2025         else if (alg_a & SSL_aRSA)
2026                 {
2027                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2028                         i=SSL_PKEY_RSA_SIGN;
2029                 else
2030                         i=SSL_PKEY_RSA_ENC;
2031                 }
2032         else if (alg_a & SSL_aKRB5)
2033                 {
2034                 /* VRS something else here? */
2035                 return(NULL);
2036                 }
2037         else if (alg_a & SSL_aGOST94)
2038                 i=SSL_PKEY_GOST94;
2039         else if (alg_a & SSL_aGOST01)
2040                 i=SSL_PKEY_GOST01;
2041         else /* if (alg_a & SSL_aNULL) */
2042                 {
2043                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2044                 return(NULL);
2045                 }
2046         if (c->pkeys[i].x509 == NULL) return(NULL);
2047
2048         return(c->pkeys[i].x509);
2049         }
2050
2051 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
2052         {
2053         unsigned long alg_a;
2054         CERT *c;
2055
2056         alg_a = cipher->algorithm_auth;
2057         c=s->cert;
2058
2059         if ((alg_a & SSL_aDSS) &&
2060                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2061                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2062         else if (alg_a & SSL_aRSA)
2063                 {
2064                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2065                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2066                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2067                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2068                 else
2069                         return(NULL);
2070                 }
2071         else if ((alg_a & SSL_aECDSA) &&
2072                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2073                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2074         else /* if (alg_a & SSL_aNULL) */
2075                 {
2076                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2077                 return(NULL);
2078                 }
2079         }
2080
2081 void ssl_update_cache(SSL *s,int mode)
2082         {
2083         int i;
2084
2085         /* If the session_id_length is 0, we are not supposed to cache it,
2086          * and it would be rather hard to do anyway :-) */
2087         if (s->session->session_id_length == 0) return;
2088
2089         i=s->session_ctx->session_cache_mode;
2090         if ((i & mode) && (!s->hit)
2091                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2092                     || SSL_CTX_add_session(s->session_ctx,s->session))
2093                 && (s->session_ctx->new_session_cb != NULL))
2094                 {
2095                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2096                 if (!s->session_ctx->new_session_cb(s,s->session))
2097                         SSL_SESSION_free(s->session);
2098                 }
2099
2100         /* auto flush every 255 connections */
2101         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2102                 ((i & mode) == mode))
2103                 {
2104                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2105                         ?s->session_ctx->stats.sess_connect_good
2106                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2107                         {
2108                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2109                         }
2110                 }
2111         }
2112
2113 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2114         {
2115         return(s->method);
2116         }
2117
2118 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2119         {
2120         int conn= -1;
2121         int ret=1;
2122
2123         if (s->method != meth)
2124                 {
2125                 if (s->handshake_func != NULL)
2126                         conn=(s->handshake_func == s->method->ssl_connect);
2127
2128                 if (s->method->version == meth->version)
2129                         s->method=meth;
2130                 else
2131                         {
2132                         s->method->ssl_free(s);
2133                         s->method=meth;
2134                         ret=s->method->ssl_new(s);
2135                         }
2136
2137                 if (conn == 1)
2138                         s->handshake_func=meth->ssl_connect;
2139                 else if (conn == 0)
2140                         s->handshake_func=meth->ssl_accept;
2141                 }
2142         return(ret);
2143         }
2144
2145 int SSL_get_error(const SSL *s,int i)
2146         {
2147         int reason;
2148         unsigned long l;
2149         BIO *bio;
2150
2151         if (i > 0) return(SSL_ERROR_NONE);
2152
2153         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2154          * etc, where we do encode the error */
2155         if ((l=ERR_peek_error()) != 0)
2156                 {
2157                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2158                         return(SSL_ERROR_SYSCALL);
2159                 else
2160                         return(SSL_ERROR_SSL);
2161                 }
2162
2163         if ((i < 0) && SSL_want_read(s))
2164                 {
2165                 bio=SSL_get_rbio(s);
2166                 if (BIO_should_read(bio))
2167                         return(SSL_ERROR_WANT_READ);
2168                 else if (BIO_should_write(bio))
2169                         /* This one doesn't make too much sense ... We never try
2170                          * to write to the rbio, and an application program where
2171                          * rbio and wbio are separate couldn't even know what it
2172                          * should wait for.
2173                          * However if we ever set s->rwstate incorrectly
2174                          * (so that we have SSL_want_read(s) instead of
2175                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2176                          * this test works around that bug; so it might be safer
2177                          * to keep it. */
2178                         return(SSL_ERROR_WANT_WRITE);
2179                 else if (BIO_should_io_special(bio))
2180                         {
2181                         reason=BIO_get_retry_reason(bio);
2182                         if (reason == BIO_RR_CONNECT)
2183                                 return(SSL_ERROR_WANT_CONNECT);
2184                         else if (reason == BIO_RR_ACCEPT)
2185                                 return(SSL_ERROR_WANT_ACCEPT);
2186                         else
2187                                 return(SSL_ERROR_SYSCALL); /* unknown */
2188                         }
2189                 }
2190
2191         if ((i < 0) && SSL_want_write(s))
2192                 {
2193                 bio=SSL_get_wbio(s);
2194                 if (BIO_should_write(bio))
2195                         return(SSL_ERROR_WANT_WRITE);
2196                 else if (BIO_should_read(bio))
2197                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2198                         return(SSL_ERROR_WANT_READ);
2199                 else if (BIO_should_io_special(bio))
2200                         {
2201                         reason=BIO_get_retry_reason(bio);
2202                         if (reason == BIO_RR_CONNECT)
2203                                 return(SSL_ERROR_WANT_CONNECT);
2204                         else if (reason == BIO_RR_ACCEPT)
2205                                 return(SSL_ERROR_WANT_ACCEPT);
2206                         else
2207                                 return(SSL_ERROR_SYSCALL);
2208                         }
2209                 }
2210         if ((i < 0) && SSL_want_x509_lookup(s))
2211                 {
2212                 return(SSL_ERROR_WANT_X509_LOOKUP);
2213                 }
2214
2215         if (i == 0)
2216                 {
2217                 if (s->version == SSL2_VERSION)
2218                         {
2219                         /* assume it is the socket being closed */
2220                         return(SSL_ERROR_ZERO_RETURN);
2221                         }
2222                 else
2223                         {
2224                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2225                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2226                                 return(SSL_ERROR_ZERO_RETURN);
2227                         }
2228                 }
2229         return(SSL_ERROR_SYSCALL);
2230         }
2231
2232 int SSL_do_handshake(SSL *s)
2233         {
2234         int ret=1;
2235
2236         if (s->handshake_func == NULL)
2237                 {
2238                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2239                 return(-1);
2240                 }
2241
2242         s->method->ssl_renegotiate_check(s);
2243
2244         if (SSL_in_init(s) || SSL_in_before(s))
2245                 {
2246                 ret=s->handshake_func(s);
2247                 }
2248         return(ret);
2249         }
2250
2251 /* For the next 2 functions, SSL_clear() sets shutdown and so
2252  * one of these calls will reset it */
2253 void SSL_set_accept_state(SSL *s)
2254         {
2255         s->server=1;
2256         s->shutdown=0;
2257         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2258         s->handshake_func=s->method->ssl_accept;
2259         /* clear the current cipher */
2260         ssl_clear_cipher_ctx(s);
2261         ssl_clear_hash_ctx(&s->read_hash);
2262         ssl_clear_hash_ctx(&s->write_hash);
2263         }
2264
2265 void SSL_set_connect_state(SSL *s)
2266         {
2267         s->server=0;
2268         s->shutdown=0;
2269         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2270         s->handshake_func=s->method->ssl_connect;
2271         /* clear the current cipher */
2272         ssl_clear_cipher_ctx(s);
2273         ssl_clear_hash_ctx(&s->read_hash);
2274         ssl_clear_hash_ctx(&s->write_hash);
2275         }
2276
2277 int ssl_undefined_function(SSL *s)
2278         {
2279         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2280         return(0);
2281         }
2282
2283 int ssl_undefined_void_function(void)
2284         {
2285         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2286         return(0);
2287         }
2288
2289 int ssl_undefined_const_function(const SSL *s)
2290         {
2291         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2292         return(0);
2293         }
2294
2295 SSL_METHOD *ssl_bad_method(int ver)
2296         {
2297         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2298         return(NULL);
2299         }
2300
2301 const char *SSL_get_version(const SSL *s)
2302         {
2303         if (s->version == TLS1_VERSION)
2304                 return("TLSv1");
2305         else if (s->version == SSL3_VERSION)
2306                 return("SSLv3");
2307         else if (s->version == SSL2_VERSION)
2308                 return("SSLv2");
2309         else
2310                 return("unknown");
2311         }
2312
2313 SSL *SSL_dup(SSL *s)
2314         {
2315         STACK_OF(X509_NAME) *sk;
2316         X509_NAME *xn;
2317         SSL *ret;
2318         int i;
2319
2320         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2321             return(NULL);
2322
2323         ret->version = s->version;
2324         ret->type = s->type;
2325         ret->method = s->method;
2326
2327         if (s->session != NULL)
2328                 {
2329                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2330                 SSL_copy_session_id(ret,s);
2331                 }
2332         else
2333                 {
2334                 /* No session has been established yet, so we have to expect
2335                  * that s->cert or ret->cert will be changed later --
2336                  * they should not both point to the same object,
2337                  * and thus we can't use SSL_copy_session_id. */
2338
2339                 ret->method->ssl_free(ret);
2340                 ret->method = s->method;
2341                 ret->method->ssl_new(ret);
2342
2343                 if (s->cert != NULL)
2344                         {
2345                         if (ret->cert != NULL)
2346                                 {
2347                                 ssl_cert_free(ret->cert);
2348                                 }
2349                         ret->cert = ssl_cert_dup(s->cert);
2350                         if (ret->cert == NULL)
2351                                 goto err;
2352                         }
2353
2354                 SSL_set_session_id_context(ret,
2355                         s->sid_ctx, s->sid_ctx_length);
2356                 }
2357
2358         ret->options=s->options;
2359         ret->mode=s->mode;
2360         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2361         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2362         ret->msg_callback = s->msg_callback;
2363         ret->msg_callback_arg = s->msg_callback_arg;
2364         SSL_set_verify(ret,SSL_get_verify_mode(s),
2365                 SSL_get_verify_callback(s));
2366         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2367         ret->generate_session_id = s->generate_session_id;
2368
2369         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2370
2371         ret->debug=s->debug;
2372
2373         /* copy app data, a little dangerous perhaps */
2374         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2375                 goto err;
2376
2377         /* setup rbio, and wbio */
2378         if (s->rbio != NULL)
2379                 {
2380                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2381                         goto err;
2382                 }
2383         if (s->wbio != NULL)
2384                 {
2385                 if (s->wbio != s->rbio)
2386                         {
2387                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2388                                 goto err;
2389                         }
2390                 else
2391                         ret->wbio=ret->rbio;
2392                 }
2393         ret->rwstate = s->rwstate;
2394         ret->in_handshake = s->in_handshake;
2395         ret->handshake_func = s->handshake_func;
2396         ret->server = s->server;
2397         ret->new_session = s->new_session;
2398         ret->quiet_shutdown = s->quiet_shutdown;
2399         ret->shutdown=s->shutdown;
2400         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2401         ret->rstate=s->rstate;
2402         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2403         ret->hit=s->hit;
2404
2405         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2406
2407         /* dup the cipher_list and cipher_list_by_id stacks */
2408         if (s->cipher_list != NULL)
2409                 {
2410                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2411                         goto err;
2412                 }
2413         if (s->cipher_list_by_id != NULL)
2414                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2415                         == NULL)
2416                         goto err;
2417
2418         /* Dup the client_CA list */
2419         if (s->client_CA != NULL)
2420                 {
2421                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2422                 ret->client_CA=sk;
2423                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2424                         {
2425                         xn=sk_X509_NAME_value(sk,i);
2426                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2427                                 {
2428                                 X509_NAME_free(xn);
2429                                 goto err;
2430                                 }
2431                         }
2432                 }
2433
2434         if (0)
2435                 {
2436 err:
2437                 if (ret != NULL) SSL_free(ret);
2438                 ret=NULL;
2439                 }
2440         return(ret);
2441         }
2442
2443 void ssl_clear_cipher_ctx(SSL *s)
2444         {
2445         if (s->enc_read_ctx != NULL)
2446                 {
2447                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2448                 OPENSSL_free(s->enc_read_ctx);
2449                 s->enc_read_ctx=NULL;
2450                 }
2451         if (s->enc_write_ctx != NULL)
2452                 {
2453                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2454                 OPENSSL_free(s->enc_write_ctx);
2455                 s->enc_write_ctx=NULL;
2456                 }
2457 #ifndef OPENSSL_NO_COMP
2458         if (s->expand != NULL)
2459                 {
2460                 COMP_CTX_free(s->expand);
2461                 s->expand=NULL;
2462                 }
2463         if (s->compress != NULL)
2464                 {
2465                 COMP_CTX_free(s->compress);
2466                 s->compress=NULL;
2467                 }
2468 #endif
2469         }
2470
2471 /* Fix this function so that it takes an optional type parameter */
2472 X509 *SSL_get_certificate(const SSL *s)
2473         {
2474         if (s->cert != NULL)
2475                 return(s->cert->key->x509);
2476         else
2477                 return(NULL);
2478         }
2479
2480 /* Fix this function so that it takes an optional type parameter */
2481 EVP_PKEY *SSL_get_privatekey(SSL *s)
2482         {
2483         if (s->cert != NULL)
2484                 return(s->cert->key->privatekey);
2485         else
2486                 return(NULL);
2487         }
2488
2489 SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2490         {
2491         if ((s->session != NULL) && (s->session->cipher != NULL))
2492                 return(s->session->cipher);
2493         return(NULL);
2494         }
2495 #ifdef OPENSSL_NO_COMP
2496 const void *SSL_get_current_compression(SSL *s)
2497         {
2498         return NULL;
2499         }
2500 const void *SSL_get_current_expansion(SSL *s)
2501         {
2502         return NULL;
2503         }
2504 #else
2505
2506 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2507         {
2508         if (s->compress != NULL)
2509                 return(s->compress->meth);
2510         return(NULL);
2511         }
2512
2513 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2514         {
2515         if (s->expand != NULL)
2516                 return(s->expand->meth);
2517         return(NULL);
2518         }
2519 #endif
2520
2521 int ssl_init_wbio_buffer(SSL *s,int push)
2522         {
2523         BIO *bbio;
2524
2525         if (s->bbio == NULL)
2526                 {
2527                 bbio=BIO_new(BIO_f_buffer());
2528                 if (bbio == NULL) return(0);
2529                 s->bbio=bbio;
2530                 }
2531         else
2532                 {
2533                 bbio=s->bbio;
2534                 if (s->bbio == s->wbio)
2535                         s->wbio=BIO_pop(s->wbio);
2536                 }
2537         (void)BIO_reset(bbio);
2538 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2539         if (!BIO_set_read_buffer_size(bbio,1))
2540                 {
2541                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2542                 return(0);
2543                 }
2544         if (push)
2545                 {
2546                 if (s->wbio != bbio)
2547                         s->wbio=BIO_push(bbio,s->wbio);
2548                 }
2549         else
2550                 {
2551                 if (s->wbio == bbio)
2552                         s->wbio=BIO_pop(bbio);
2553                 }
2554         return(1);
2555         }
2556
2557 void ssl_free_wbio_buffer(SSL *s)
2558         {
2559         if (s->bbio == NULL) return;
2560
2561         if (s->bbio == s->wbio)
2562                 {
2563                 /* remove buffering */
2564                 s->wbio=BIO_pop(s->wbio);
2565 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2566                 assert(s->wbio != NULL);
2567 #endif
2568         }
2569         BIO_free(s->bbio);
2570         s->bbio=NULL;
2571         }
2572
2573 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2574         {
2575         ctx->quiet_shutdown=mode;
2576         }
2577
2578 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2579         {
2580         return(ctx->quiet_shutdown);
2581         }
2582
2583 void SSL_set_quiet_shutdown(SSL *s,int mode)
2584         {
2585         s->quiet_shutdown=mode;
2586         }
2587
2588 int SSL_get_quiet_shutdown(const SSL *s)
2589         {
2590         return(s->quiet_shutdown);
2591         }
2592
2593 void SSL_set_shutdown(SSL *s,int mode)
2594         {
2595         s->shutdown=mode;
2596         }
2597
2598 int SSL_get_shutdown(const SSL *s)
2599         {
2600         return(s->shutdown);
2601         }
2602
2603 int SSL_version(const SSL *s)
2604         {
2605         return(s->version);
2606         }
2607
2608 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2609         {
2610         return(ssl->ctx);
2611         }
2612
2613 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2614         {
2615         if (ssl->ctx == ctx)
2616                 return ssl->ctx;
2617 #ifndef OPENSSL_NO_TLSEXT
2618         if (ctx == NULL)
2619                 ctx = ssl->initial_ctx;
2620 #endif
2621         if (ssl->cert != NULL)
2622                 ssl_cert_free(ssl->cert);
2623         ssl->cert = ssl_cert_dup(ctx->cert);
2624         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2625         if (ssl->ctx != NULL)
2626                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2627         ssl->ctx = ctx;
2628         return(ssl->ctx);
2629         }
2630
2631 #ifndef OPENSSL_NO_STDIO
2632 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2633         {
2634         return(X509_STORE_set_default_paths(ctx->cert_store));
2635         }
2636
2637 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2638                 const char *CApath)
2639         {
2640         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2641         }
2642 #endif
2643
2644 void SSL_set_info_callback(SSL *ssl,
2645         void (*cb)(const SSL *ssl,int type,int val))
2646         {
2647         ssl->info_callback=cb;
2648         }
2649
2650 /* One compiler (Diab DCC) doesn't like argument names in returned
2651    function pointer.  */
2652 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2653         {
2654         return ssl->info_callback;
2655         }
2656
2657 int SSL_state(const SSL *ssl)
2658         {
2659         return(ssl->state);
2660         }
2661
2662 void SSL_set_verify_result(SSL *ssl,long arg)
2663         {
2664         ssl->verify_result=arg;
2665         }
2666
2667 long SSL_get_verify_result(const SSL *ssl)
2668         {
2669         return(ssl->verify_result);
2670         }
2671
2672 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2673                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2674         {
2675         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2676                                 new_func, dup_func, free_func);
2677         }
2678
2679 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2680         {
2681         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2682         }
2683
2684 void *SSL_get_ex_data(const SSL *s,int idx)
2685         {
2686         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2687         }
2688
2689 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2690                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2691         {
2692         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2693                                 new_func, dup_func, free_func);
2694         }
2695
2696 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2697         {
2698         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2699         }
2700
2701 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2702         {
2703         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2704         }
2705
2706 int ssl_ok(SSL *s)
2707         {
2708         return(1);
2709         }
2710
2711 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2712         {
2713         return(ctx->cert_store);
2714         }
2715
2716 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2717         {
2718         if (ctx->cert_store != NULL)
2719                 X509_STORE_free(ctx->cert_store);
2720         ctx->cert_store=store;
2721         }
2722
2723 int SSL_want(const SSL *s)
2724         {
2725         return(s->rwstate);
2726         }
2727
2728 /*!
2729  * \brief Set the callback for generating temporary RSA keys.
2730  * \param ctx the SSL context.
2731  * \param cb the callback
2732  */
2733
2734 #ifndef OPENSSL_NO_RSA
2735 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2736                                                           int is_export,
2737                                                           int keylength))
2738     {
2739     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2740     }
2741
2742 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2743                                                   int is_export,
2744                                                   int keylength))
2745     {
2746     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2747     }
2748 #endif
2749
2750 #ifdef DOXYGEN
2751 /*!
2752  * \brief The RSA temporary key callback function.
2753  * \param ssl the SSL session.
2754  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2755  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2756  * of the required key in bits.
2757  * \return the temporary RSA key.
2758  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2759  */
2760
2761 RSA *cb(SSL *ssl,int is_export,int keylength)
2762     {}
2763 #endif
2764
2765 /*!
2766  * \brief Set the callback for generating temporary DH keys.
2767  * \param ctx the SSL context.
2768  * \param dh the callback
2769  */
2770
2771 #ifndef OPENSSL_NO_DH
2772 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2773                                                         int keylength))
2774         {
2775         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2776         }
2777
2778 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2779                                                 int keylength))
2780         {
2781         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2782         }
2783 #endif
2784
2785 #ifndef OPENSSL_NO_ECDH
2786 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2787                                                                 int keylength))
2788         {
2789         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2790         }
2791
2792 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2793                                                         int keylength))
2794         {
2795         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2796         }
2797 #endif
2798
2799 #ifndef OPENSSL_NO_PSK
2800 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2801         {
2802         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2803                 {
2804                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2805                 return 0;
2806                 }
2807         if (ctx->psk_identity_hint != NULL)
2808                 OPENSSL_free(ctx->psk_identity_hint);
2809         if (identity_hint != NULL)
2810                 {
2811                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2812                 if (ctx->psk_identity_hint == NULL)
2813                         return 0;
2814                 }
2815         else
2816                 ctx->psk_identity_hint = NULL;
2817         return 1;
2818         }
2819
2820 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2821         {
2822         if (s == NULL)
2823                 return 0;
2824
2825         if (s->session == NULL)
2826                 return 1; /* session not created yet, ignored */
2827
2828         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2829                 {
2830                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2831                 return 0;
2832                 }
2833         if (s->session->psk_identity_hint != NULL)
2834                 OPENSSL_free(s->session->psk_identity_hint);
2835         if (identity_hint != NULL)
2836                 {
2837                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2838                 if (s->session->psk_identity_hint == NULL)
2839                         return 0;
2840                 }
2841         else
2842                 s->session->psk_identity_hint = NULL;
2843         return 1;
2844         }
2845
2846 const char *SSL_get_psk_identity_hint(const SSL *s)
2847         {
2848         if (s == NULL || s->session == NULL)
2849                 return NULL;
2850         return(s->session->psk_identity_hint);
2851         }
2852
2853 const char *SSL_get_psk_identity(const SSL *s)
2854         {
2855         if (s == NULL || s->session == NULL)
2856                 return NULL;
2857         return(s->session->psk_identity);
2858         }
2859
2860 void SSL_set_psk_client_callback(SSL *s,
2861     unsigned int (*cb)(SSL *ssl, const char *hint,
2862                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2863                        unsigned int max_psk_len))
2864         {
2865         s->psk_client_callback = cb;
2866         }
2867
2868 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2869     unsigned int (*cb)(SSL *ssl, const char *hint,
2870                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2871                        unsigned int max_psk_len))
2872         {
2873         ctx->psk_client_callback = cb;
2874         }
2875
2876 void SSL_set_psk_server_callback(SSL *s,
2877     unsigned int (*cb)(SSL *ssl, const char *identity,
2878                        unsigned char *psk, unsigned int max_psk_len))
2879         {
2880         s->psk_server_callback = cb;
2881         }
2882
2883 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2884     unsigned int (*cb)(SSL *ssl, const char *identity,
2885                        unsigned char *psk, unsigned int max_psk_len))
2886         {
2887         ctx->psk_server_callback = cb;
2888         }
2889 #endif
2890
2891 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))
2892         {
2893         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2894         }
2895 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))
2896         {
2897         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2898         }
2899
2900 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2901  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2902  * any. If EVP_MD pointer is passed, initializes ctx with this md
2903  * Returns newly allocated ctx;
2904  */
2905
2906 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
2907 {
2908         ssl_clear_hash_ctx(hash);
2909         *hash = EVP_MD_CTX_create();
2910         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2911         return *hash;
2912 }
2913 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
2914 {
2915
2916         if (*hash) EVP_MD_CTX_destroy(*hash);
2917         *hash=NULL;
2918 }
2919
2920 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2921 #include "../crypto/bio/bss_file.c"
2922 #endif
2923
2924 IMPLEMENT_STACK_OF(SSL_CIPHER)
2925 IMPLEMENT_STACK_OF(SSL_COMP)