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),
 263                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 264         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 265                 {
 266                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 267                 return(0);
 268                 }
 269         return(1);
 270         }
 271
 272 SSL *SSL_new(SSL_CTX *ctx)
 273         {
 274         SSL *s;
 275
 276         if (ctx == NULL)
 277                 {
 278                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 279                 return(NULL);
 280                 }
 281         if (ctx->method == NULL)
 282                 {
 283                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 284                 return(NULL);
 285                 }
 286
 287         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 288         if (s == NULL) goto err;
 289         memset(s,0,sizeof(SSL));
 290
 291 #ifndef OPENSSL_NO_KRB5
 292         s->kssl_ctx = kssl_ctx_new();
 293 #endif  /* OPENSSL_NO_KRB5 */
 294
 295         s->options=ctx->options;
 296         s->mode=ctx->mode;
 297         s->max_cert_list=ctx->max_cert_list;
 298
 299         if (ctx->cert != NULL)
 300                 {
 301                 /* Earlier library versions used to copy the pointer to
 302                  * the CERT, not its contents; only when setting new
 303                  * parameters for the per-SSL copy, ssl_cert_new would be
 304                  * called (and the direct reference to the per-SSL_CTX
 305                  * settings would be lost, but those still were indirectly
 306                  * accessed for various purposes, and for that reason they
 307                  * used to be known as s->ctx->default_cert).
 308                  * Now we don't look at the SSL_CTX's CERT after having
 309                  * duplicated it once. */
 310
 311                 s->cert = ssl_cert_dup(ctx->cert);
 312                 if (s->cert == NULL)
 313                         goto err;
 314                 }
 315         else
 316                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 317
 318         s->read_ahead=ctx->read_ahead;
 319         s->msg_callback=ctx->msg_callback;
 320         s->msg_callback_arg=ctx->msg_callback_arg;
 321         s->verify_mode=ctx->verify_mode;
 322 #if 0
 323         s->verify_depth=ctx->verify_depth;
 324 #endif
 325         s->sid_ctx_length=ctx->sid_ctx_length;
 326         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 327         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 328         s->verify_callback=ctx->default_verify_callback;
 329         s->generate_session_id=ctx->generate_session_id;
 330
 331         s->param = X509_VERIFY_PARAM_new();
 332         if (!s->param)
 333                 goto err;
 334         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 335 #if 0
 336         s->purpose = ctx->purpose;
 337         s->trust = ctx->trust;
 338 #endif
 339         s->quiet_shutdown=ctx->quiet_shutdown;
 340         s->max_send_fragment = ctx->max_send_fragment;
 341
 342         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 343         s->ctx=ctx;
 344 #ifndef OPENSSL_NO_TLSEXT
 345         s->tlsext_debug_cb = 0;
 346         s->tlsext_debug_arg = NULL;
 347         s->tlsext_ticket_expected = 0;
 348         s->tlsext_status_type = -1;
 349         s->tlsext_status_expected = 0;
 350         s->tlsext_ocsp_ids = NULL;
 351         s->tlsext_ocsp_exts = NULL;
 352         s->tlsext_ocsp_resp = NULL;
 353         s->tlsext_ocsp_resplen = -1;
 354         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 355         s->initial_ctx=ctx;
 356 #endif
 357
 358         s->verify_result=X509_V_OK;
 359
 360         s->method=ctx->method;
 361
 362         if (!s->method->ssl_new(s))
 363                 goto err;
 364
 365         s->references=1;
 366         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 367
 368         SSL_clear(s);
 369
 370         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 371
 372 #ifndef OPENSSL_NO_PSK
 373         s->psk_client_callback=ctx->psk_client_callback;
 374         s->psk_server_callback=ctx->psk_server_callback;
 375 #endif
 376
 377         return(s);
 378 err:
 379         if (s != NULL)
 380                 {
 381                 if (s->cert != NULL)
 382                         ssl_cert_free(s->cert);
 383                 if (s->ctx != NULL)
 384                         SSL_CTX_free(s->ctx); /* decrement reference count */
 385                 OPENSSL_free(s);
 386                 }
 387         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 388         return(NULL);
 389         }
 390
 391 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 392                                    unsigned int sid_ctx_len)
 393     {
 394     if(sid_ctx_len > sizeof ctx->sid_ctx)
 395         {
 396         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 397         return 0;
 398         }
 399     ctx->sid_ctx_length=sid_ctx_len;
 400     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 401
 402     return 1;
 403     }
 404
 405 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 406                                unsigned int sid_ctx_len)
 407     {
 408     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 409         {
 410         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 411         return 0;
 412         }
 413     ssl->sid_ctx_length=sid_ctx_len;
 414     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 415
 416     return 1;
 417     }
 418
 419 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 420         {
 421         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 422         ctx->generate_session_id = cb;
 423         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 424         return 1;
 425         }
 426
 427 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 428         {
 429         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 430         ssl->generate_session_id = cb;
 431         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 432         return 1;
 433         }
 434
 435 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 436                                 unsigned int id_len)
 437         {
 438         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 439          * we can "construct" a session to give us the desired check - ie. to
 440          * find if there's a session in the hash table that would conflict with
 441          * any new session built out of this id/id_len and the ssl_version in
 442          * use by this SSL. */
 443         SSL_SESSION r, *p;
 444
 445         if(id_len > sizeof r.session_id)
 446                 return 0;
 447
 448         r.ssl_version = ssl->version;
 449         r.session_id_length = id_len;
 450         memcpy(r.session_id, id, id_len);
 451         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 452          * callback is calling us to check the uniqueness of a shorter ID, it
 453          * must be compared as a padded-out ID because that is what it will be
 454          * converted to when the callback has finished choosing it. */
 455         if((r.ssl_version == SSL2_VERSION) &&
 456                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 457                 {
 458                 memset(r.session_id + id_len, 0,
 459                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 460                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 461                 }
 462
 463         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 464         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 465         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 466         return (p != NULL);
 467         }
 468
 469 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 470         {
 471         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 472         }
 473
 474 int SSL_set_purpose(SSL *s, int purpose)
 475         {
 476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 477         }
 478
 479 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 480         {
 481         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 482         }
 483
 484 int SSL_set_trust(SSL *s, int trust)
 485         {
 486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 487         }
 488
 489 void SSL_free(SSL *s)
 490         {
 491         int i;
 492
 493         if(s == NULL)
 494             return;
 495
 496         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 497 #ifdef REF_PRINT
 498         REF_PRINT("SSL",s);
 499 #endif
 500         if (i > 0) return;
 501 #ifdef REF_CHECK
 502         if (i < 0)
 503                 {
 504                 fprintf(stderr,"SSL_free, bad reference count\n");
 505                 abort(); /* ok */
 506                 }
 507 #endif
 508
 509         if (s->param)
 510                 X509_VERIFY_PARAM_free(s->param);
 511
 512         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 513
 514         if (s->bbio != NULL)
 515                 {
 516                 /* If the buffering BIO is in place, pop it off */
 517                 if (s->bbio == s->wbio)
 518                         {
 519                         s->wbio=BIO_pop(s->wbio);
 520                         }
 521                 BIO_free(s->bbio);
 522                 s->bbio=NULL;
 523                 }
 524         if (s->rbio != NULL)
 525                 BIO_free_all(s->rbio);
 526         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 527                 BIO_free_all(s->wbio);
 528
 529         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 530
 531         /* add extra stuff */
 532         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 533         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 534
 535         /* Make the next call work :-) */
 536         if (s->session != NULL)
 537                 {
 538                 ssl_clear_bad_session(s);
 539                 SSL_SESSION_free(s->session);
 540                 }
 541
 542         ssl_clear_cipher_ctx(s);
 543         ssl_clear_hash_ctx(&s->read_hash);
 544         ssl_clear_hash_ctx(&s->write_hash);
 545
 546         if (s->cert != NULL) ssl_cert_free(s->cert);
 547         /* Free up if allocated */
 548
 549         if (s->ctx) SSL_CTX_free(s->ctx);
 550 #ifndef OPENSSL_NO_TLSEXT
 551         if (s->tlsext_hostname)
 552                 OPENSSL_free(s->tlsext_hostname);
 553         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 554 #ifndef OPENSSL_NO_EC
 555         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 556         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 557 #endif /* OPENSSL_NO_EC */
 558         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 559         if (s->tlsext_ocsp_exts)
 560                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 561                                                 X509_EXTENSION_free);
 562         if (s->tlsext_ocsp_ids)
 563                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 564         if (s->tlsext_ocsp_resp)
 565                 OPENSSL_free(s->tlsext_ocsp_resp);
 566 #endif
 567
 568         if (s->client_CA != NULL)
 569                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 570
 571         if (s->method != NULL) s->method->ssl_free(s);
 572
 573 #ifndef OPENSSL_NO_KRB5
 574         if (s->kssl_ctx != NULL)
 575                 kssl_ctx_free(s->kssl_ctx);
 576 #endif  /* OPENSSL_NO_KRB5 */
 577
 578         OPENSSL_free(s);
 579         }
 580
 581 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 582         {
 583         /* If the output buffering BIO is still in place, remove it
 584          */
 585         if (s->bbio != NULL)
 586                 {
 587                 if (s->wbio == s->bbio)
 588                         {
 589                         s->wbio=s->wbio->next_bio;
 590                         s->bbio->next_bio=NULL;
 591                         }
 592                 }
 593         if ((s->rbio != NULL) && (s->rbio != rbio))
 594                 BIO_free_all(s->rbio);
 595         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 596                 BIO_free_all(s->wbio);
 597         s->rbio=rbio;
 598         s->wbio=wbio;
 599         }
 600
 601 BIO *SSL_get_rbio(const SSL *s)
 602         { return(s->rbio); }
 603
 604 BIO *SSL_get_wbio(const SSL *s)
 605         { return(s->wbio); }
 606
 607 int SSL_get_fd(const SSL *s)
 608         {
 609         return(SSL_get_rfd(s));
 610         }
 611
 612 int SSL_get_rfd(const SSL *s)
 613         {
 614         int ret= -1;
 615         BIO *b,*r;
 616
 617         b=SSL_get_rbio(s);
 618         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 619         if (r != NULL)
 620                 BIO_get_fd(r,&ret);
 621         return(ret);
 622         }
 623
 624 int SSL_get_wfd(const SSL *s)
 625         {
 626         int ret= -1;
 627         BIO *b,*r;
 628
 629         b=SSL_get_wbio(s);
 630         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 631         if (r != NULL)
 632                 BIO_get_fd(r,&ret);
 633         return(ret);
 634         }
 635
 636 #ifndef OPENSSL_NO_SOCK
 637 int SSL_set_fd(SSL *s,int fd)
 638         {
 639         int ret=0;
 640         BIO *bio=NULL;
 641
 642         bio=BIO_new(BIO_s_socket());
 643
 644         if (bio == NULL)
 645                 {
 646                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 647                 goto err;
 648                 }
 649         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 650         SSL_set_bio(s,bio,bio);
 651         ret=1;
 652 err:
 653         return(ret);
 654         }
 655
 656 int SSL_set_wfd(SSL *s,int fd)
 657         {
 658         int ret=0;
 659         BIO *bio=NULL;
 660
 661         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 662                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 663                 {
 664                 bio=BIO_new(BIO_s_socket());
 665
 666                 if (bio == NULL)
 667                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 668                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 669                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 670                 }
 671         else
 672                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 673         ret=1;
 674 err:
 675         return(ret);
 676         }
 677
 678 int SSL_set_rfd(SSL *s,int fd)
 679         {
 680         int ret=0;
 681         BIO *bio=NULL;
 682
 683         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 684                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 685                 {
 686                 bio=BIO_new(BIO_s_socket());
 687
 688                 if (bio == NULL)
 689                         {
 690                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 691                         goto err;
 692                         }
 693                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 694                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 695                 }
 696         else
 697                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 698         ret=1;
 699 err:
 700         return(ret);
 701         }
 702 #endif
 703
 704
 705 /* return length of latest Finished message we sent, copy to 'buf' */
 706 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 707         {
 708         size_t ret = 0;
 709
 710         if (s->s3 != NULL)
 711                 {
 712                 ret = s->s3->tmp.finish_md_len;
 713                 if (count > ret)
 714                         count = ret;
 715                 memcpy(buf, s->s3->tmp.finish_md, count);
 716                 }
 717         return ret;
 718         }
 719
 720 /* return length of latest Finished message we expected, copy to 'buf' */
 721 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 722         {
 723         size_t ret = 0;
 724
 725         if (s->s3 != NULL)
 726                 {
 727                 ret = s->s3->tmp.peer_finish_md_len;
 728                 if (count > ret)
 729                         count = ret;
 730                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 731                 }
 732         return ret;
 733         }
 734
 735
 736 int SSL_get_verify_mode(const SSL *s)
 737         {
 738         return(s->verify_mode);
 739         }
 740
 741 int SSL_get_verify_depth(const SSL *s)
 742         {
 743         return X509_VERIFY_PARAM_get_depth(s->param);
 744         }
 745
 746 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 747         {
 748         return(s->verify_callback);
 749         }
 750
 751 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 752         {
 753         return(ctx->verify_mode);
 754         }
 755
 756 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 757         {
 758         return X509_VERIFY_PARAM_get_depth(ctx->param);
 759         }
 760
 761 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 762         {
 763         return(ctx->default_verify_callback);
 764         }
 765
 766 void SSL_set_verify(SSL *s,int mode,
 767                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 768         {
 769         s->verify_mode=mode;
 770         if (callback != NULL)
 771                 s->verify_callback=callback;
 772         }
 773
 774 void SSL_set_verify_depth(SSL *s,int depth)
 775         {
 776         X509_VERIFY_PARAM_set_depth(s->param, depth);
 777         }
 778
 779 void SSL_set_read_ahead(SSL *s,int yes)
 780         {
 781         s->read_ahead=yes;
 782         }
 783
 784 int SSL_get_read_ahead(const SSL *s)
 785         {
 786         return(s->read_ahead);
 787         }
 788
 789 int SSL_pending(const SSL *s)
 790         {
 791         /* SSL_pending cannot work properly if read-ahead is enabled
 792          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 793          * and it is impossible to fix since SSL_pending cannot report
 794          * errors that may be observed while scanning the new data.
 795          * (Note that SSL_pending() is often used as a boolean value,
 796          * so we'd better not return -1.)
 797          */
 798         return(s->method->ssl_pending(s));
 799         }
 800
 801 X509 *SSL_get_peer_certificate(const SSL *s)
 802         {
 803         X509 *r;
 804
 805         if ((s == NULL) || (s->session == NULL))
 806                 r=NULL;
 807         else
 808                 r=s->session->peer;
 809
 810         if (r == NULL) return(r);
 811
 812         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 813
 814         return(r);
 815         }
 816
 817 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 818         {
 819         STACK_OF(X509) *r;
 820
 821         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 822                 r=NULL;
 823         else
 824                 r=s->session->sess_cert->cert_chain;
 825
 826         /* If we are a client, cert_chain includes the peer's own
 827          * certificate; if we are a server, it does not. */
 828
 829         return(r);
 830         }
 831
 832 /* Now in theory, since the calling process own 't' it should be safe to
 833  * modify.  We need to be able to read f without being hassled */
 834 void SSL_copy_session_id(SSL *t,const SSL *f)
 835         {
 836         CERT *tmp;
 837
 838         /* Do we need to to SSL locking? */
 839         SSL_set_session(t,SSL_get_session(f));
 840
 841         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 842          * vice-versa */
 843         if (t->method != f->method)
 844                 {
 845                 t->method->ssl_free(t); /* cleanup current */
 846                 t->method=f->method;    /* change method */
 847                 t->method->ssl_new(t);  /* setup new */
 848                 }
 849
 850         tmp=t->cert;
 851         if (f->cert != NULL)
 852                 {
 853                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 854                 t->cert=f->cert;
 855                 }
 856         else
 857                 t->cert=NULL;
 858         if (tmp != NULL) ssl_cert_free(tmp);
 859         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 860         }
 861
 862 /* Fix this so it checks all the valid key/cert options */
 863 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 864         {
 865         if (    (ctx == NULL) ||
 866                 (ctx->cert == NULL) ||
 867                 (ctx->cert->key->x509 == NULL))
 868                 {
 869                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 870                 return(0);
 871                 }
 872         if      (ctx->cert->key->privatekey == NULL)
 873                 {
 874                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 875                 return(0);
 876                 }
 877         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 878         }
 879
 880 /* Fix this function so that it takes an optional type parameter */
 881 int SSL_check_private_key(const SSL *ssl)
 882         {
 883         if (ssl == NULL)
 884                 {
 885                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 886                 return(0);
 887                 }
 888         if (ssl->cert == NULL)
 889                 {
 890                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 891                 return 0;
 892                 }
 893         if (ssl->cert->key->x509 == NULL)
 894                 {
 895                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 896                 return(0);
 897                 }
 898         if (ssl->cert->key->privatekey == NULL)
 899                 {
 900                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 901                 return(0);
 902                 }
 903         return(X509_check_private_key(ssl->cert->key->x509,
 904                 ssl->cert->key->privatekey));
 905         }
 906
 907 int SSL_accept(SSL *s)
 908         {
 909         if (s->handshake_func == 0)
 910                 /* Not properly initialized yet */
 911                 SSL_set_accept_state(s);
 912
 913         return(s->method->ssl_accept(s));
 914         }
 915
 916 int SSL_connect(SSL *s)
 917         {
 918         if (s->handshake_func == 0)
 919                 /* Not properly initialized yet */
 920                 SSL_set_connect_state(s);
 921
 922         return(s->method->ssl_connect(s));
 923         }
 924
 925 long SSL_get_default_timeout(const SSL *s)
 926         {
 927         return(s->method->get_timeout());
 928         }
 929
 930 int SSL_read(SSL *s,void *buf,int num)
 931         {
 932         if (s->handshake_func == 0)
 933                 {
 934                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 935                 return -1;
 936                 }
 937
 938         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 939                 {
 940                 s->rwstate=SSL_NOTHING;
 941                 return(0);
 942                 }
 943         return(s->method->ssl_read(s,buf,num));
 944         }
 945
 946 int SSL_peek(SSL *s,void *buf,int num)
 947         {
 948         if (s->handshake_func == 0)
 949                 {
 950                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 951                 return -1;
 952                 }
 953
 954         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 955                 {
 956                 return(0);
 957                 }
 958         return(s->method->ssl_peek(s,buf,num));
 959         }
 960
 961 int SSL_write(SSL *s,const void *buf,int num)
 962         {
 963         if (s->handshake_func == 0)
 964                 {
 965                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 966                 return -1;
 967                 }
 968
 969         if (s->shutdown & SSL_SENT_SHUTDOWN)
 970                 {
 971                 s->rwstate=SSL_NOTHING;
 972                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 973                 return(-1);
 974                 }
 975         return(s->method->ssl_write(s,buf,num));
 976         }
 977
 978 int SSL_shutdown(SSL *s)
 979         {
 980         /* Note that this function behaves differently from what one might
 981          * expect.  Return values are 0 for no success (yet),
 982          * 1 for success; but calling it once is usually not enough,
 983          * even if blocking I/O is used (see ssl3_shutdown).
 984          */
 985
 986         if (s->handshake_func == 0)
 987                 {
 988                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 989                 return -1;
 990                 }
 991
 992         if ((s != NULL) && !SSL_in_init(s))
 993                 return(s->method->ssl_shutdown(s));
 994         else
 995                 return(1);
 996         }
 997
 998 int SSL_renegotiate(SSL *s)
 999         {
1000         if (s->new_session == 0)
1001                 {
1002                 s->new_session=1;
1003                 }
1004         return(s->method->ssl_renegotiate(s));
1005         }
1006
1007 int SSL_renegotiate_pending(SSL *s)
1008         {
1009         /* becomes true when negotiation is requested;
1010          * false again once a handshake has finished */
1011         return (s->new_session != 0);
1012         }
1013
1014 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1015         {
1016         long l;
1017
1018         switch (cmd)
1019                 {
1020         case SSL_CTRL_GET_READ_AHEAD:
1021                 return(s->read_ahead);
1022         case SSL_CTRL_SET_READ_AHEAD:
1023                 l=s->read_ahead;
1024                 s->read_ahead=larg;
1025                 return(l);
1026
1027         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1028                 s->msg_callback_arg = parg;
1029                 return 1;
1030
1031         case SSL_CTRL_OPTIONS:
1032                 return(s->options|=larg);
1033         case SSL_CTRL_MODE:
1034                 return(s->mode|=larg);
1035         case SSL_CTRL_GET_MAX_CERT_LIST:
1036                 return(s->max_cert_list);
1037         case SSL_CTRL_SET_MAX_CERT_LIST:
1038                 l=s->max_cert_list;
1039                 s->max_cert_list=larg;
1040                 return(l);
1041         case SSL_CTRL_SET_MTU:
1042                 if (SSL_version(s) == DTLS1_VERSION ||
1043                     SSL_version(s) == DTLS1_BAD_VER)
1044                         {
1045                         s->d1->mtu = larg;
1046                         return larg;
1047                         }
1048                 return 0;
1049         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1050                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1051                         return 0;
1052                 s->max_send_fragment = larg;
1053                 return 1;
1054         default:
1055                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1056                 }
1057         }
1058
1059 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1060         {
1061         switch(cmd)
1062                 {
1063         case SSL_CTRL_SET_MSG_CALLBACK:
1064                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1065                 return 1;
1066
1067         default:
1068                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1069                 }
1070         }
1071
1072 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1073         {
1074         return ctx->sessions;
1075         }
1076
1077 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1078         {
1079         long l;
1080
1081         switch (cmd)
1082                 {
1083         case SSL_CTRL_GET_READ_AHEAD:
1084                 return(ctx->read_ahead);
1085         case SSL_CTRL_SET_READ_AHEAD:
1086                 l=ctx->read_ahead;
1087                 ctx->read_ahead=larg;
1088                 return(l);
1089
1090         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1091                 ctx->msg_callback_arg = parg;
1092                 return 1;
1093
1094         case SSL_CTRL_GET_MAX_CERT_LIST:
1095                 return(ctx->max_cert_list);
1096         case SSL_CTRL_SET_MAX_CERT_LIST:
1097                 l=ctx->max_cert_list;
1098                 ctx->max_cert_list=larg;
1099                 return(l);
1100
1101         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1102                 l=ctx->session_cache_size;
1103                 ctx->session_cache_size=larg;
1104                 return(l);
1105         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1106                 return(ctx->session_cache_size);
1107         case SSL_CTRL_SET_SESS_CACHE_MODE:
1108                 l=ctx->session_cache_mode;
1109                 ctx->session_cache_mode=larg;
1110                 return(l);
1111         case SSL_CTRL_GET_SESS_CACHE_MODE:
1112                 return(ctx->session_cache_mode);
1113
1114         case SSL_CTRL_SESS_NUMBER:
1115                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1116         case SSL_CTRL_SESS_CONNECT:
1117                 return(ctx->stats.sess_connect);
1118         case SSL_CTRL_SESS_CONNECT_GOOD:
1119                 return(ctx->stats.sess_connect_good);
1120         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1121                 return(ctx->stats.sess_connect_renegotiate);
1122         case SSL_CTRL_SESS_ACCEPT:
1123                 return(ctx->stats.sess_accept);
1124         case SSL_CTRL_SESS_ACCEPT_GOOD:
1125                 return(ctx->stats.sess_accept_good);
1126         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1127                 return(ctx->stats.sess_accept_renegotiate);
1128         case SSL_CTRL_SESS_HIT:
1129                 return(ctx->stats.sess_hit);
1130         case SSL_CTRL_SESS_CB_HIT:
1131                 return(ctx->stats.sess_cb_hit);
1132         case SSL_CTRL_SESS_MISSES:
1133                 return(ctx->stats.sess_miss);
1134         case SSL_CTRL_SESS_TIMEOUTS:
1135                 return(ctx->stats.sess_timeout);
1136         case SSL_CTRL_SESS_CACHE_FULL:
1137                 return(ctx->stats.sess_cache_full);
1138         case SSL_CTRL_OPTIONS:
1139                 return(ctx->options|=larg);
1140         case SSL_CTRL_MODE:
1141                 return(ctx->mode|=larg);
1142         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1143                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1144                         return 0;
1145                 ctx->max_send_fragment = larg;
1146                 return 1;
1147         default:
1148                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1149                 }
1150         }
1151
1152 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1153         {
1154         switch(cmd)
1155                 {
1156         case SSL_CTRL_SET_MSG_CALLBACK:
1157                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1158                 return 1;
1159
1160         default:
1161                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1162                 }
1163         }
1164
1165 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1166         {
1167         long l;
1168
1169         l=a->id-b->id;
1170         if (l == 0L)
1171                 return(0);
1172         else
1173                 return((l > 0)?1:-1);
1174         }
1175
1176 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1177                         const SSL_CIPHER * const *bp)
1178         {
1179         long l;
1180
1181         l=(*ap)->id-(*bp)->id;
1182         if (l == 0L)
1183                 return(0);
1184         else
1185                 return((l > 0)?1:-1);
1186         }
1187
1188 /** return a STACK of the ciphers available for the SSL and in order of
1189  * preference */
1190 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1191         {
1192         if (s != NULL)
1193                 {
1194                 if (s->cipher_list != NULL)
1195                         {
1196                         return(s->cipher_list);
1197                         }
1198                 else if ((s->ctx != NULL) &&
1199                         (s->ctx->cipher_list != NULL))
1200                         {
1201                         return(s->ctx->cipher_list);
1202                         }
1203                 }
1204         return(NULL);
1205         }
1206
1207 /** return a STACK of the ciphers available for the SSL and in order of
1208  * algorithm id */
1209 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1210         {
1211         if (s != NULL)
1212                 {
1213                 if (s->cipher_list_by_id != NULL)
1214                         {
1215                         return(s->cipher_list_by_id);
1216                         }
1217                 else if ((s->ctx != NULL) &&
1218                         (s->ctx->cipher_list_by_id != NULL))
1219                         {
1220                         return(s->ctx->cipher_list_by_id);
1221                         }
1222                 }
1223         return(NULL);
1224         }
1225
1226 /** The old interface to get the same thing as SSL_get_ciphers() */
1227 const char *SSL_get_cipher_list(const SSL *s,int n)
1228         {
1229         SSL_CIPHER *c;
1230         STACK_OF(SSL_CIPHER) *sk;
1231
1232         if (s == NULL) return(NULL);
1233         sk=SSL_get_ciphers(s);
1234         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1235                 return(NULL);
1236         c=sk_SSL_CIPHER_value(sk,n);
1237         if (c == NULL) return(NULL);
1238         return(c->name);
1239         }
1240
1241 /** specify the ciphers to be used by default by the SSL_CTX */
1242 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1243         {
1244         STACK_OF(SSL_CIPHER) *sk;
1245
1246         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1247                 &ctx->cipher_list_by_id,str);
1248         /* ssl_create_cipher_list may return an empty stack if it
1249          * was unable to find a cipher matching the given rule string
1250          * (for example if the rule string specifies a cipher which
1251          * has been disabled). This is not an error as far as
1252          * ssl_create_cipher_list is concerned, and hence
1253          * ctx->cipher_list and ctx->cipher_list_by_id has been
1254          * updated. */
1255         if (sk == NULL)
1256                 return 0;
1257         else if (sk_SSL_CIPHER_num(sk) == 0)
1258                 {
1259                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1260                 return 0;
1261                 }
1262         return 1;
1263         }
1264
1265 /** specify the ciphers to be used by the SSL */
1266 int SSL_set_cipher_list(SSL *s,const char *str)
1267         {
1268         STACK_OF(SSL_CIPHER) *sk;
1269
1270         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1271                 &s->cipher_list_by_id,str);
1272         /* see comment in SSL_CTX_set_cipher_list */
1273         if (sk == NULL)
1274                 return 0;
1275         else if (sk_SSL_CIPHER_num(sk) == 0)
1276                 {
1277                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1278                 return 0;
1279                 }
1280         return 1;
1281         }
1282
1283 /* works well for SSLv2, not so good for SSLv3 */
1284 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1285         {
1286         char *p;
1287         STACK_OF(SSL_CIPHER) *sk;
1288         SSL_CIPHER *c;
1289         int i;
1290
1291         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1292                 (len < 2))
1293                 return(NULL);
1294
1295         p=buf;
1296         sk=s->session->ciphers;
1297         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1298                 {
1299                 int n;
1300
1301                 c=sk_SSL_CIPHER_value(sk,i);
1302                 n=strlen(c->name);
1303                 if (n+1 > len)
1304                         {
1305                         if (p != buf)
1306                                 --p;
1307                         *p='\0';
1308                         return buf;
1309                         }
1310                 strcpy(p,c->name);
1311                 p+=n;
1312                 *(p++)=':';
1313                 len-=n+1;
1314                 }
1315         p[-1]='\0';
1316         return(buf);
1317         }
1318
1319 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1320                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1321         {
1322         int i,j=0;
1323         SSL_CIPHER *c;
1324         unsigned char *q;
1325 #ifndef OPENSSL_NO_KRB5
1326         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1327 #endif /* OPENSSL_NO_KRB5 */
1328
1329         if (sk == NULL) return(0);
1330         q=p;
1331
1332         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1333                 {
1334                 c=sk_SSL_CIPHER_value(sk,i);
1335 #ifndef OPENSSL_NO_KRB5
1336                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1337                     nokrb5)
1338                     continue;
1339 #endif /* OPENSSL_NO_KRB5 */
1340 #ifndef OPENSSL_NO_PSK
1341                 /* with PSK there must be client callback set */
1342                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1343                     s->psk_client_callback == NULL)
1344                         continue;
1345 #endif /* OPENSSL_NO_PSK */
1346                 /* DTLS doesn't currently support ECDHE */
1347                 if ((s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) && (c->algorithm_mkey & SSL_kEECDH))
1348                         continue;
1349                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1350                 p+=j;
1351                 }
1352         return(p-q);
1353         }
1354
1355 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1356                                                STACK_OF(SSL_CIPHER) **skp)
1357         {
1358         const SSL_CIPHER *c;
1359         STACK_OF(SSL_CIPHER) *sk;
1360         int i,n;
1361
1362         n=ssl_put_cipher_by_char(s,NULL,NULL);
1363         if ((num%n) != 0)
1364                 {
1365                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1366                 return(NULL);
1367                 }
1368         if ((skp == NULL) || (*skp == NULL))
1369                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1370         else
1371                 {
1372                 sk= *skp;
1373                 sk_SSL_CIPHER_zero(sk);
1374                 }
1375
1376         for (i=0; i<num; i+=n)
1377                 {
1378                 c=ssl_get_cipher_by_char(s,p);
1379                 p+=n;
1380                 if (c != NULL)
1381                         {
1382                         if (!sk_SSL_CIPHER_push(sk,c))
1383                                 {
1384                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1385                                 goto err;
1386                                 }
1387                         }
1388                 }
1389
1390         if (skp != NULL)
1391                 *skp=sk;
1392         return(sk);
1393 err:
1394         if ((skp == NULL) || (*skp == NULL))
1395                 sk_SSL_CIPHER_free(sk);
1396         return(NULL);
1397         }
1398
1399
1400 #ifndef OPENSSL_NO_TLSEXT
1401 /** return a servername extension value if provided in Client Hello, or NULL.
1402  * So far, only host_name types are defined (RFC 3546).
1403  */
1404
1405 const char *SSL_get_servername(const SSL *s, const int type)
1406         {
1407         if (type != TLSEXT_NAMETYPE_host_name)
1408                 return NULL;
1409
1410         return s->session && !s->tlsext_hostname ?
1411                 s->session->tlsext_hostname :
1412                 s->tlsext_hostname;
1413         }
1414
1415 int SSL_get_servername_type(const SSL *s)
1416         {
1417         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1418                 return TLSEXT_NAMETYPE_host_name;
1419         return -1;
1420         }
1421 #endif
1422
1423 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1424         {
1425         unsigned long l;
1426
1427         l=(unsigned long)
1428                 ((unsigned int) a->session_id[0]     )|
1429                 ((unsigned int) a->session_id[1]<< 8L)|
1430                 ((unsigned long)a->session_id[2]<<16L)|
1431                 ((unsigned long)a->session_id[3]<<24L);
1432         return(l);
1433         }
1434
1435 /* NB: If this function (or indeed the hash function which uses a sort of
1436  * coarser function than this one) is changed, ensure
1437  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1438  * able to construct an SSL_SESSION that will collide with any existing session
1439  * with a matching session ID. */
1440 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1441         {
1442         if (a->ssl_version != b->ssl_version)
1443                 return(1);
1444         if (a->session_id_length != b->session_id_length)
1445                 return(1);
1446         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1447         }
1448
1449 /* These wrapper functions should remain rather than redeclaring
1450  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1451  * variable. The reason is that the functions aren't static, they're exposed via
1452  * ssl.h. */
1453 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1454 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1455
1456 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1457         {
1458         SSL_CTX *ret=NULL;
1459
1460         if (meth == NULL)
1461                 {
1462                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1463                 return(NULL);
1464                 }
1465
1466         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1467                 {
1468                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1469                 goto err;
1470                 }
1471         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1472         if (ret == NULL)
1473                 goto err;
1474
1475         memset(ret,0,sizeof(SSL_CTX));
1476
1477         ret->method=meth;
1478
1479         ret->cert_store=NULL;
1480         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1481         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1482         ret->session_cache_head=NULL;
1483         ret->session_cache_tail=NULL;
1484
1485         /* We take the system default */
1486         ret->session_timeout=meth->get_timeout();
1487
1488         ret->new_session_cb=0;
1489         ret->remove_session_cb=0;
1490         ret->get_session_cb=0;
1491         ret->generate_session_id=0;
1492
1493         memset((char *)&ret->stats,0,sizeof(ret->stats));
1494
1495         ret->references=1;
1496         ret->quiet_shutdown=0;
1497
1498 /*      ret->cipher=NULL;*/
1499 /*      ret->s2->challenge=NULL;
1500         ret->master_key=NULL;
1501         ret->key_arg=NULL;
1502         ret->s2->conn_id=NULL; */
1503
1504         ret->info_callback=NULL;
1505
1506         ret->app_verify_callback=0;
1507         ret->app_verify_arg=NULL;
1508
1509         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1510         ret->read_ahead=0;
1511         ret->msg_callback=0;
1512         ret->msg_callback_arg=NULL;
1513         ret->verify_mode=SSL_VERIFY_NONE;
1514 #if 0
1515         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1516 #endif
1517         ret->sid_ctx_length=0;
1518         ret->default_verify_callback=NULL;
1519         if ((ret->cert=ssl_cert_new()) == NULL)
1520                 goto err;
1521
1522         ret->default_passwd_callback=0;
1523         ret->default_passwd_callback_userdata=NULL;
1524         ret->client_cert_cb=0;
1525         ret->app_gen_cookie_cb=0;
1526         ret->app_verify_cookie_cb=0;
1527
1528         ret->sessions=lh_SSL_SESSION_new();
1529         if (ret->sessions == NULL) goto err;
1530         ret->cert_store=X509_STORE_new();
1531         if (ret->cert_store == NULL) goto err;
1532
1533         ssl_create_cipher_list(ret->method,
1534                 &ret->cipher_list,&ret->cipher_list_by_id,
1535                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1536         if (ret->cipher_list == NULL
1537             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1538                 {
1539                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1540                 goto err2;
1541                 }
1542
1543         ret->param = X509_VERIFY_PARAM_new();
1544         if (!ret->param)
1545                 goto err;
1546
1547         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1548                 {
1549                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1550                 goto err2;
1551                 }
1552         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1553                 {
1554                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1555                 goto err2;
1556                 }
1557         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1558                 {
1559                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1560                 goto err2;
1561                 }
1562
1563         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1564                 goto err;
1565
1566         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1567
1568         ret->extra_certs=NULL;
1569         ret->comp_methods=SSL_COMP_get_compression_methods();
1570
1571         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1572
1573 #ifndef OPENSSL_NO_TLSEXT
1574         ret->tlsext_servername_callback = 0;
1575         ret->tlsext_servername_arg = NULL;
1576         /* Setup RFC4507 ticket keys */
1577         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1578                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1579                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1580                 ret->options |= SSL_OP_NO_TICKET;
1581
1582         ret->tlsext_status_cb = 0;
1583         ret->tlsext_status_arg = NULL;
1584
1585 #endif
1586 #ifndef OPENSSL_NO_PSK
1587         ret->psk_identity_hint=NULL;
1588         ret->psk_client_callback=NULL;
1589         ret->psk_server_callback=NULL;
1590 #endif
1591 #ifndef OPENSSL_NO_BUF_FREELISTS
1592         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1593         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1594         if (!ret->rbuf_freelist)
1595                 goto err;
1596         ret->rbuf_freelist->chunklen = 0;
1597         ret->rbuf_freelist->len = 0;
1598         ret->rbuf_freelist->head = NULL;
1599         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1600         if (!ret->wbuf_freelist)
1601                 {
1602                 OPENSSL_free(ret->rbuf_freelist);
1603                 goto err;
1604                 }
1605         ret->wbuf_freelist->chunklen = 0;
1606         ret->wbuf_freelist->len = 0;
1607         ret->wbuf_freelist->head = NULL;
1608 #endif
1609 #ifndef OPENSSL_NO_ENGINE
1610         ret->client_cert_engine = NULL;
1611 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1612 #define eng_strx(x)     #x
1613 #define eng_str(x)      eng_strx(x)
1614         /* Use specific client engine automatically... ignore errors */
1615         {
1616         ENGINE *eng;
1617         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1618         if (!eng)
1619                 {
1620                 ERR_clear_error();
1621                 ENGINE_load_builtin_engines();
1622                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1623                 }
1624         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1625                 ERR_clear_error();
1626         }
1627 #endif
1628 #endif
1629
1630         return(ret);
1631 err:
1632         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1633 err2:
1634         if (ret != NULL) SSL_CTX_free(ret);
1635         return(NULL);
1636         }
1637
1638 #if 0
1639 static void SSL_COMP_free(SSL_COMP *comp)
1640     { OPENSSL_free(comp); }
1641 #endif
1642
1643 #ifndef OPENSSL_NO_BUF_FREELISTS
1644 static void
1645 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1646         {
1647         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1648         for (ent = list->head; ent; ent = next)
1649                 {
1650                 next = ent->next;
1651                 OPENSSL_free(ent);
1652                 }
1653         OPENSSL_free(list);
1654         }
1655 #endif
1656
1657 void SSL_CTX_free(SSL_CTX *a)
1658         {
1659         int i;
1660
1661         if (a == NULL) return;
1662
1663         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1664 #ifdef REF_PRINT
1665         REF_PRINT("SSL_CTX",a);
1666 #endif
1667         if (i > 0) return;
1668 #ifdef REF_CHECK
1669         if (i < 0)
1670                 {
1671                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1672                 abort(); /* ok */
1673                 }
1674 #endif
1675
1676         if (a->param)
1677                 X509_VERIFY_PARAM_free(a->param);
1678
1679         /*
1680          * Free internal session cache. However: the remove_cb() may reference
1681          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1682          * after the sessions were flushed.
1683          * As the ex_data handling routines might also touch the session cache,
1684          * the most secure solution seems to be: empty (flush) the cache, then
1685          * free ex_data, then finally free the cache.
1686          * (See ticket [openssl.org #212].)
1687          */
1688         if (a->sessions != NULL)
1689                 SSL_CTX_flush_sessions(a,0);
1690
1691         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1692
1693         if (a->sessions != NULL)
1694                 lh_SSL_SESSION_free(a->sessions);
1695
1696         if (a->cert_store != NULL)
1697                 X509_STORE_free(a->cert_store);
1698         if (a->cipher_list != NULL)
1699                 sk_SSL_CIPHER_free(a->cipher_list);
1700         if (a->cipher_list_by_id != NULL)
1701                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1702         if (a->cert != NULL)
1703                 ssl_cert_free(a->cert);
1704         if (a->client_CA != NULL)
1705                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1706         if (a->extra_certs != NULL)
1707                 sk_X509_pop_free(a->extra_certs,X509_free);
1708 #if 0 /* This should never be done, since it removes a global database */
1709         if (a->comp_methods != NULL)
1710                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1711 #else
1712         a->comp_methods = NULL;
1713 #endif
1714
1715 #ifndef OPENSSL_NO_PSK
1716         if (a->psk_identity_hint)
1717                 OPENSSL_free(a->psk_identity_hint);
1718 #endif
1719 #ifndef OPENSSL_NO_ENGINE
1720         if (a->client_cert_engine)
1721                 ENGINE_finish(a->client_cert_engine);
1722 #endif
1723
1724 #ifndef OPENSSL_NO_BUF_FREELISTS
1725         if (a->wbuf_freelist)
1726                 ssl_buf_freelist_free(a->wbuf_freelist);
1727         if (a->rbuf_freelist)
1728                 ssl_buf_freelist_free(a->rbuf_freelist);
1729 #endif
1730
1731         OPENSSL_free(a);
1732         }
1733
1734 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1735         {
1736         ctx->default_passwd_callback=cb;
1737         }
1738
1739 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1740         {
1741         ctx->default_passwd_callback_userdata=u;
1742         }
1743
1744 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1745         {
1746         ctx->app_verify_callback=cb;
1747         ctx->app_verify_arg=arg;
1748         }
1749
1750 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1751         {
1752         ctx->verify_mode=mode;
1753         ctx->default_verify_callback=cb;
1754         }
1755
1756 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1757         {
1758         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1759         }
1760
1761 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1762         {
1763         CERT_PKEY *cpk;
1764         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1765         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1766         int rsa_tmp_export,dh_tmp_export,kl;
1767         unsigned long mask_k,mask_a,emask_k,emask_a;
1768         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1769 #ifndef OPENSSL_NO_ECDH
1770         int have_ecdh_tmp;
1771 #endif
1772         X509 *x = NULL;
1773         EVP_PKEY *ecc_pkey = NULL;
1774         int signature_nid = 0;
1775
1776         if (c == NULL) return;
1777
1778         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1779
1780 #ifndef OPENSSL_NO_RSA
1781         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1782         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1783                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1784 #else
1785         rsa_tmp=rsa_tmp_export=0;
1786 #endif
1787 #ifndef OPENSSL_NO_DH
1788         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1789         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1790                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1791 #else
1792         dh_tmp=dh_tmp_export=0;
1793 #endif
1794
1795 #ifndef OPENSSL_NO_ECDH
1796         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1797 #endif
1798         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1799         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1800         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1801         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1802         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1803         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1804         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1805         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1806         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1807         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1808         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1809 /* FIX THIS EAY EAY EAY */
1810         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1811         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1812         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1813         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1814         mask_k=0;
1815         mask_a=0;
1816         emask_k=0;
1817         emask_a=0;
1818
1819
1820
1821 #ifdef CIPHER_DEBUG
1822         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1823                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1824                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1825 #endif
1826
1827         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1828         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1829                 mask_k |= SSL_kGOST;
1830                 mask_a |= SSL_aGOST01;
1831         }
1832         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1833         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1834                 mask_k |= SSL_kGOST;
1835                 mask_a |= SSL_aGOST94;
1836         }
1837
1838         if (rsa_enc || (rsa_tmp && rsa_sign))
1839                 mask_k|=SSL_kRSA;
1840         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1841                 emask_k|=SSL_kRSA;
1842
1843 #if 0
1844         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1845         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1846                 (rsa_enc || rsa_sign || dsa_sign))
1847                 mask_k|=SSL_kEDH;
1848         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1849                 (rsa_enc || rsa_sign || dsa_sign))
1850                 emask_k|=SSL_kEDH;
1851 #endif
1852
1853         if (dh_tmp_export)
1854                 emask_k|=SSL_kEDH;
1855
1856         if (dh_tmp)
1857                 mask_k|=SSL_kEDH;
1858
1859         if (dh_rsa) mask_k|=SSL_kDHr;
1860         if (dh_rsa_export) emask_k|=SSL_kDHr;
1861
1862         if (dh_dsa) mask_k|=SSL_kDHd;
1863         if (dh_dsa_export) emask_k|=SSL_kDHd;
1864
1865         if (rsa_enc || rsa_sign)
1866                 {
1867                 mask_a|=SSL_aRSA;
1868                 emask_a|=SSL_aRSA;
1869                 }
1870
1871         if (dsa_sign)
1872                 {
1873                 mask_a|=SSL_aDSS;
1874                 emask_a|=SSL_aDSS;
1875                 }
1876
1877         mask_a|=SSL_aNULL;
1878         emask_a|=SSL_aNULL;
1879
1880 #ifndef OPENSSL_NO_KRB5
1881         mask_k|=SSL_kKRB5;
1882         mask_a|=SSL_aKRB5;
1883         emask_k|=SSL_kKRB5;
1884         emask_a|=SSL_aKRB5;
1885 #endif
1886
1887         /* An ECC certificate may be usable for ECDH and/or
1888          * ECDSA cipher suites depending on the key usage extension.
1889          */
1890         if (have_ecc_cert)
1891                 {
1892                 /* This call populates extension flags (ex_flags) */
1893                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1894                 X509_check_purpose(x, -1, 0);
1895                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1896                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1897                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1898                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1899                 ecc_pkey = X509_get_pubkey(x);
1900                 ecc_pkey_size = (ecc_pkey != NULL) ?
1901                     EVP_PKEY_bits(ecc_pkey) : 0;
1902                 EVP_PKEY_free(ecc_pkey);
1903                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1904                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1905 #ifndef OPENSSL_NO_ECDH
1906                 if (ecdh_ok)
1907                         {
1908                         const char *sig = OBJ_nid2ln(signature_nid);
1909                         if (sig == NULL)
1910                                 {
1911                                 ERR_clear_error();
1912                                 sig = "unknown";
1913                                 }
1914
1915                         if (strstr(sig, "WithRSA"))
1916                                 {
1917                                 mask_k|=SSL_kECDHr;
1918                                 mask_a|=SSL_aECDH;
1919                                 if (ecc_pkey_size <= 163)
1920                                         {
1921                                         emask_k|=SSL_kECDHr;
1922                                         emask_a|=SSL_aECDH;
1923                                         }
1924                                 }
1925
1926                         if (signature_nid == NID_ecdsa_with_SHA1)
1927                                 {
1928                                 mask_k|=SSL_kECDHe;
1929                                 mask_a|=SSL_aECDH;
1930                                 if (ecc_pkey_size <= 163)
1931                                         {
1932                                         emask_k|=SSL_kECDHe;
1933                                         emask_a|=SSL_aECDH;
1934                                         }
1935                                 }
1936                         }
1937 #endif
1938 #ifndef OPENSSL_NO_ECDSA
1939                 if (ecdsa_ok)
1940                         {
1941                         mask_a|=SSL_aECDSA;
1942                         emask_a|=SSL_aECDSA;
1943                         }
1944 #endif
1945                 }
1946
1947 #ifndef OPENSSL_NO_ECDH
1948         if (have_ecdh_tmp)
1949                 {
1950                 mask_k|=SSL_kEECDH;
1951                 emask_k|=SSL_kEECDH;
1952                 }
1953 #endif
1954
1955 #ifndef OPENSSL_NO_PSK
1956         mask_k |= SSL_kPSK;
1957         mask_a |= SSL_aPSK;
1958         emask_k |= SSL_kPSK;
1959         emask_a |= SSL_aPSK;
1960 #endif
1961
1962         c->mask_k=mask_k;
1963         c->mask_a=mask_a;
1964         c->export_mask_k=emask_k;
1965         c->export_mask_a=emask_a;
1966         c->valid=1;
1967         }
1968
1969 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1970 #define ku_reject(x, usage) \
1971         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1972
1973 #ifndef OPENSSL_NO_EC
1974
1975 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
1976         {
1977         unsigned long alg_k, alg_a;
1978         EVP_PKEY *pkey = NULL;
1979         int keysize = 0;
1980         int signature_nid = 0;
1981
1982         alg_k = cs->algorithm_mkey;
1983         alg_a = cs->algorithm_auth;
1984
1985         if (SSL_C_IS_EXPORT(cs))
1986                 {
1987                 /* ECDH key length in export ciphers must be <= 163 bits */
1988                 pkey = X509_get_pubkey(x);
1989                 if (pkey == NULL) return 0;
1990                 keysize = EVP_PKEY_bits(pkey);
1991                 EVP_PKEY_free(pkey);
1992                 if (keysize > 163) return 0;
1993                 }
1994
1995         /* This call populates the ex_flags field correctly */
1996         X509_check_purpose(x, -1, 0);
1997         if ((x->sig_alg) && (x->sig_alg->algorithm))
1998                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1999         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2000                 {
2001                 /* key usage, if present, must allow key agreement */
2002                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2003                         {
2004                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2005                         return 0;
2006                         }
2007                 if (alg_k & SSL_kECDHe)
2008                         {
2009                         /* signature alg must be ECDSA */
2010                         if (signature_nid != NID_ecdsa_with_SHA1)
2011                                 {
2012                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2013                                 return 0;
2014                                 }
2015                         }
2016                 if (alg_k & SSL_kECDHr)
2017                         {
2018                         /* signature alg must be RSA */
2019
2020                         const char *sig = OBJ_nid2ln(signature_nid);
2021                         if (sig == NULL)
2022                                 {
2023                                 ERR_clear_error();
2024                                 sig = "unknown";
2025                                 }
2026                         if (strstr(sig, "WithRSA") == NULL)
2027                                 {
2028                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2029                                 return 0;
2030                                 }
2031                         }
2032                 }
2033         if (alg_a & SSL_aECDSA)
2034                 {
2035                 /* key usage, if present, must allow signing */
2036                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2037                         {
2038                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2039                         return 0;
2040                         }
2041                 }
2042
2043         return 1;  /* all checks are ok */
2044         }
2045
2046 #endif
2047
2048 /* THIS NEEDS CLEANING UP */
2049 X509 *ssl_get_server_send_cert(SSL *s)
2050         {
2051         unsigned long alg_k,alg_a,mask_k,mask_a;
2052         CERT *c;
2053         int i,is_export;
2054
2055         c=s->cert;
2056         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2057         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2058         if (is_export)
2059                 {
2060                 mask_k = c->export_mask_k;
2061                 mask_a = c->export_mask_a;
2062                 }
2063         else
2064                 {
2065                 mask_k = c->mask_k;
2066                 mask_a = c->mask_a;
2067                 }
2068
2069         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2070         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2071
2072         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2073                 {
2074                 /* we don't need to look at SSL_kEECDH
2075                  * since no certificate is needed for
2076                  * anon ECDH and for authenticated
2077                  * EECDH, the check for the auth
2078                  * algorithm will set i correctly
2079                  * NOTE: For ECDH-RSA, we need an ECC
2080                  * not an RSA cert but for EECDH-RSA
2081                  * we need an RSA cert. Placing the
2082                  * checks for SSL_kECDH before RSA
2083                  * checks ensures the correct cert is chosen.
2084                  */
2085                 i=SSL_PKEY_ECC;
2086                 }
2087         else if (alg_a & SSL_aECDSA)
2088                 {
2089                 i=SSL_PKEY_ECC;
2090                 }
2091         else if (alg_k & SSL_kDHr)
2092                 i=SSL_PKEY_DH_RSA;
2093         else if (alg_k & SSL_kDHd)
2094                 i=SSL_PKEY_DH_DSA;
2095         else if (alg_a & SSL_aDSS)
2096                 i=SSL_PKEY_DSA_SIGN;
2097         else if (alg_a & SSL_aRSA)
2098                 {
2099                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2100                         i=SSL_PKEY_RSA_SIGN;
2101                 else
2102                         i=SSL_PKEY_RSA_ENC;
2103                 }
2104         else if (alg_a & SSL_aKRB5)
2105                 {
2106                 /* VRS something else here? */
2107                 return(NULL);
2108                 }
2109         else if (alg_a & SSL_aGOST94)
2110                 i=SSL_PKEY_GOST94;
2111         else if (alg_a & SSL_aGOST01)
2112                 i=SSL_PKEY_GOST01;
2113         else /* if (alg_a & SSL_aNULL) */
2114                 {
2115                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2116                 return(NULL);
2117                 }
2118         if (c->pkeys[i].x509 == NULL) return(NULL);
2119
2120         return(c->pkeys[i].x509);
2121         }
2122
2123 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2124         {
2125         unsigned long alg_a;
2126         CERT *c;
2127
2128         alg_a = cipher->algorithm_auth;
2129         c=s->cert;
2130
2131         if ((alg_a & SSL_aDSS) &&
2132                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2133                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2134         else if (alg_a & SSL_aRSA)
2135                 {
2136                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2137                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2138                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2139                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2140                 else
2141                         return(NULL);
2142                 }
2143         else if ((alg_a & SSL_aECDSA) &&
2144                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2145                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2146         else /* if (alg_a & SSL_aNULL) */
2147                 {
2148                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2149                 return(NULL);
2150                 }
2151         }
2152
2153 void ssl_update_cache(SSL *s,int mode)
2154         {
2155         int i;
2156
2157         /* If the session_id_length is 0, we are not supposed to cache it,
2158          * and it would be rather hard to do anyway :-) */
2159         if (s->session->session_id_length == 0) return;
2160
2161         i=s->session_ctx->session_cache_mode;
2162         if ((i & mode) && (!s->hit)
2163                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2164                     || SSL_CTX_add_session(s->session_ctx,s->session))
2165                 && (s->session_ctx->new_session_cb != NULL))
2166                 {
2167                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2168                 if (!s->session_ctx->new_session_cb(s,s->session))
2169                         SSL_SESSION_free(s->session);
2170                 }
2171
2172         /* auto flush every 255 connections */
2173         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2174                 ((i & mode) == mode))
2175                 {
2176                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2177                         ?s->session_ctx->stats.sess_connect_good
2178                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2179                         {
2180                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2181                         }
2182                 }
2183         }
2184
2185 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2186         {
2187         return(s->method);
2188         }
2189
2190 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2191         {
2192         int conn= -1;
2193         int ret=1;
2194
2195         if (s->method != meth)
2196                 {
2197                 if (s->handshake_func != NULL)
2198                         conn=(s->handshake_func == s->method->ssl_connect);
2199
2200                 if (s->method->version == meth->version)
2201                         s->method=meth;
2202                 else
2203                         {
2204                         s->method->ssl_free(s);
2205                         s->method=meth;
2206                         ret=s->method->ssl_new(s);
2207                         }
2208
2209                 if (conn == 1)
2210                         s->handshake_func=meth->ssl_connect;
2211                 else if (conn == 0)
2212                         s->handshake_func=meth->ssl_accept;
2213                 }
2214         return(ret);
2215         }
2216
2217 int SSL_get_error(const SSL *s,int i)
2218         {
2219         int reason;
2220         unsigned long l;
2221         BIO *bio;
2222
2223         if (i > 0) return(SSL_ERROR_NONE);
2224
2225         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2226          * etc, where we do encode the error */
2227         if ((l=ERR_peek_error()) != 0)
2228                 {
2229                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2230                         return(SSL_ERROR_SYSCALL);
2231                 else
2232                         return(SSL_ERROR_SSL);
2233                 }
2234
2235         if ((i < 0) && SSL_want_read(s))
2236                 {
2237                 bio=SSL_get_rbio(s);
2238                 if (BIO_should_read(bio))
2239                         return(SSL_ERROR_WANT_READ);
2240                 else if (BIO_should_write(bio))
2241                         /* This one doesn't make too much sense ... We never try
2242                          * to write to the rbio, and an application program where
2243                          * rbio and wbio are separate couldn't even know what it
2244                          * should wait for.
2245                          * However if we ever set s->rwstate incorrectly
2246                          * (so that we have SSL_want_read(s) instead of
2247                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2248                          * this test works around that bug; so it might be safer
2249                          * to keep it. */
2250                         return(SSL_ERROR_WANT_WRITE);
2251                 else if (BIO_should_io_special(bio))
2252                         {
2253                         reason=BIO_get_retry_reason(bio);
2254                         if (reason == BIO_RR_CONNECT)
2255                                 return(SSL_ERROR_WANT_CONNECT);
2256                         else if (reason == BIO_RR_ACCEPT)
2257                                 return(SSL_ERROR_WANT_ACCEPT);
2258                         else
2259                                 return(SSL_ERROR_SYSCALL); /* unknown */
2260                         }
2261                 }
2262
2263         if ((i < 0) && SSL_want_write(s))
2264                 {
2265                 bio=SSL_get_wbio(s);
2266                 if (BIO_should_write(bio))
2267                         return(SSL_ERROR_WANT_WRITE);
2268                 else if (BIO_should_read(bio))
2269                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2270                         return(SSL_ERROR_WANT_READ);
2271                 else if (BIO_should_io_special(bio))
2272                         {
2273                         reason=BIO_get_retry_reason(bio);
2274                         if (reason == BIO_RR_CONNECT)
2275                                 return(SSL_ERROR_WANT_CONNECT);
2276                         else if (reason == BIO_RR_ACCEPT)
2277                                 return(SSL_ERROR_WANT_ACCEPT);
2278                         else
2279                                 return(SSL_ERROR_SYSCALL);
2280                         }
2281                 }
2282         if ((i < 0) && SSL_want_x509_lookup(s))
2283                 {
2284                 return(SSL_ERROR_WANT_X509_LOOKUP);
2285                 }
2286
2287         if (i == 0)
2288                 {
2289                 if (s->version == SSL2_VERSION)
2290                         {
2291                         /* assume it is the socket being closed */
2292                         return(SSL_ERROR_ZERO_RETURN);
2293                         }
2294                 else
2295                         {
2296                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2297                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2298                                 return(SSL_ERROR_ZERO_RETURN);
2299                         }
2300                 }
2301         return(SSL_ERROR_SYSCALL);
2302         }
2303
2304 int SSL_do_handshake(SSL *s)
2305         {
2306         int ret=1;
2307
2308         if (s->handshake_func == NULL)
2309                 {
2310                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2311                 return(-1);
2312                 }
2313
2314         s->method->ssl_renegotiate_check(s);
2315
2316         if (SSL_in_init(s) || SSL_in_before(s))
2317                 {
2318                 ret=s->handshake_func(s);
2319                 }
2320         return(ret);
2321         }
2322
2323 /* For the next 2 functions, SSL_clear() sets shutdown and so
2324  * one of these calls will reset it */
2325 void SSL_set_accept_state(SSL *s)
2326         {
2327         s->server=1;
2328         s->shutdown=0;
2329         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2330         s->handshake_func=s->method->ssl_accept;
2331         /* clear the current cipher */
2332         ssl_clear_cipher_ctx(s);
2333         ssl_clear_hash_ctx(&s->read_hash);
2334         ssl_clear_hash_ctx(&s->write_hash);
2335         }
2336
2337 void SSL_set_connect_state(SSL *s)
2338         {
2339         s->server=0;
2340         s->shutdown=0;
2341         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2342         s->handshake_func=s->method->ssl_connect;
2343         /* clear the current cipher */
2344         ssl_clear_cipher_ctx(s);
2345         ssl_clear_hash_ctx(&s->read_hash);
2346         ssl_clear_hash_ctx(&s->write_hash);
2347         }
2348
2349 int ssl_undefined_function(SSL *s)
2350         {
2351         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2352         return(0);
2353         }
2354
2355 int ssl_undefined_void_function(void)
2356         {
2357         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2358         return(0);
2359         }
2360
2361 int ssl_undefined_const_function(const SSL *s)
2362         {
2363         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2364         return(0);
2365         }
2366
2367 SSL_METHOD *ssl_bad_method(int ver)
2368         {
2369         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2370         return(NULL);
2371         }
2372
2373 const char *SSL_get_version(const SSL *s)
2374         {
2375         if (s->version == TLS1_VERSION)
2376                 return("TLSv1");
2377         else if (s->version == SSL3_VERSION)
2378                 return("SSLv3");
2379         else if (s->version == SSL2_VERSION)
2380                 return("SSLv2");
2381         else
2382                 return("unknown");
2383         }
2384
2385 SSL *SSL_dup(SSL *s)
2386         {
2387         STACK_OF(X509_NAME) *sk;
2388         X509_NAME *xn;
2389         SSL *ret;
2390         int i;
2391
2392         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2393             return(NULL);
2394
2395         ret->version = s->version;
2396         ret->type = s->type;
2397         ret->method = s->method;
2398
2399         if (s->session != NULL)
2400                 {
2401                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2402                 SSL_copy_session_id(ret,s);
2403                 }
2404         else
2405                 {
2406                 /* No session has been established yet, so we have to expect
2407                  * that s->cert or ret->cert will be changed later --
2408                  * they should not both point to the same object,
2409                  * and thus we can't use SSL_copy_session_id. */
2410
2411                 ret->method->ssl_free(ret);
2412                 ret->method = s->method;
2413                 ret->method->ssl_new(ret);
2414
2415                 if (s->cert != NULL)
2416                         {
2417                         if (ret->cert != NULL)
2418                                 {
2419                                 ssl_cert_free(ret->cert);
2420                                 }
2421                         ret->cert = ssl_cert_dup(s->cert);
2422                         if (ret->cert == NULL)
2423                                 goto err;
2424                         }
2425
2426                 SSL_set_session_id_context(ret,
2427                         s->sid_ctx, s->sid_ctx_length);
2428                 }
2429
2430         ret->options=s->options;
2431         ret->mode=s->mode;
2432         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2433         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2434         ret->msg_callback = s->msg_callback;
2435         ret->msg_callback_arg = s->msg_callback_arg;
2436         SSL_set_verify(ret,SSL_get_verify_mode(s),
2437                 SSL_get_verify_callback(s));
2438         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2439         ret->generate_session_id = s->generate_session_id;
2440
2441         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2442
2443         ret->debug=s->debug;
2444
2445         /* copy app data, a little dangerous perhaps */
2446         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2447                 goto err;
2448
2449         /* setup rbio, and wbio */
2450         if (s->rbio != NULL)
2451                 {
2452                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2453                         goto err;
2454                 }
2455         if (s->wbio != NULL)
2456                 {
2457                 if (s->wbio != s->rbio)
2458                         {
2459                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2460                                 goto err;
2461                         }
2462                 else
2463                         ret->wbio=ret->rbio;
2464                 }
2465         ret->rwstate = s->rwstate;
2466         ret->in_handshake = s->in_handshake;
2467         ret->handshake_func = s->handshake_func;
2468         ret->server = s->server;
2469         ret->new_session = s->new_session;
2470         ret->quiet_shutdown = s->quiet_shutdown;
2471         ret->shutdown=s->shutdown;
2472         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2473         ret->rstate=s->rstate;
2474         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2475         ret->hit=s->hit;
2476
2477         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2478
2479         /* dup the cipher_list and cipher_list_by_id stacks */
2480         if (s->cipher_list != NULL)
2481                 {
2482                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2483                         goto err;
2484                 }
2485         if (s->cipher_list_by_id != NULL)
2486                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2487                         == NULL)
2488                         goto err;
2489
2490         /* Dup the client_CA list */
2491         if (s->client_CA != NULL)
2492                 {
2493                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2494                 ret->client_CA=sk;
2495                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2496                         {
2497                         xn=sk_X509_NAME_value(sk,i);
2498                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2499                                 {
2500                                 X509_NAME_free(xn);
2501                                 goto err;
2502                                 }
2503                         }
2504                 }
2505
2506         if (0)
2507                 {
2508 err:
2509                 if (ret != NULL) SSL_free(ret);
2510                 ret=NULL;
2511                 }
2512         return(ret);
2513         }
2514
2515 void ssl_clear_cipher_ctx(SSL *s)
2516         {
2517         if (s->enc_read_ctx != NULL)
2518                 {
2519                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2520                 OPENSSL_free(s->enc_read_ctx);
2521                 s->enc_read_ctx=NULL;
2522                 }
2523         if (s->enc_write_ctx != NULL)
2524                 {
2525                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2526                 OPENSSL_free(s->enc_write_ctx);
2527                 s->enc_write_ctx=NULL;
2528                 }
2529 #ifndef OPENSSL_NO_COMP
2530         if (s->expand != NULL)
2531                 {
2532                 COMP_CTX_free(s->expand);
2533                 s->expand=NULL;
2534                 }
2535         if (s->compress != NULL)
2536                 {
2537                 COMP_CTX_free(s->compress);
2538                 s->compress=NULL;
2539                 }
2540 #endif
2541         }
2542
2543 /* Fix this function so that it takes an optional type parameter */
2544 X509 *SSL_get_certificate(const SSL *s)
2545         {
2546         if (s->cert != NULL)
2547                 return(s->cert->key->x509);
2548         else
2549                 return(NULL);
2550         }
2551
2552 /* Fix this function so that it takes an optional type parameter */
2553 EVP_PKEY *SSL_get_privatekey(SSL *s)
2554         {
2555         if (s->cert != NULL)
2556                 return(s->cert->key->privatekey);
2557         else
2558                 return(NULL);
2559         }
2560
2561 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2562         {
2563         if ((s->session != NULL) && (s->session->cipher != NULL))
2564                 return(s->session->cipher);
2565         return(NULL);
2566         }
2567 #ifdef OPENSSL_NO_COMP
2568 const void *SSL_get_current_compression(SSL *s)
2569         {
2570         return NULL;
2571         }
2572 const void *SSL_get_current_expansion(SSL *s)
2573         {
2574         return NULL;
2575         }
2576 #else
2577
2578 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2579         {
2580         if (s->compress != NULL)
2581                 return(s->compress->meth);
2582         return(NULL);
2583         }
2584
2585 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2586         {
2587         if (s->expand != NULL)
2588                 return(s->expand->meth);
2589         return(NULL);
2590         }
2591 #endif
2592
2593 int ssl_init_wbio_buffer(SSL *s,int push)
2594         {
2595         BIO *bbio;
2596
2597         if (s->bbio == NULL)
2598                 {
2599                 bbio=BIO_new(BIO_f_buffer());
2600                 if (bbio == NULL) return(0);
2601                 s->bbio=bbio;
2602                 }
2603         else
2604                 {
2605                 bbio=s->bbio;
2606                 if (s->bbio == s->wbio)
2607                         s->wbio=BIO_pop(s->wbio);
2608                 }
2609         (void)BIO_reset(bbio);
2610 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2611         if (!BIO_set_read_buffer_size(bbio,1))
2612                 {
2613                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2614                 return(0);
2615                 }
2616         if (push)
2617                 {
2618                 if (s->wbio != bbio)
2619                         s->wbio=BIO_push(bbio,s->wbio);
2620                 }
2621         else
2622                 {
2623                 if (s->wbio == bbio)
2624                         s->wbio=BIO_pop(bbio);
2625                 }
2626         return(1);
2627         }
2628
2629 void ssl_free_wbio_buffer(SSL *s)
2630         {
2631         if (s->bbio == NULL) return;
2632
2633         if (s->bbio == s->wbio)
2634                 {
2635                 /* remove buffering */
2636                 s->wbio=BIO_pop(s->wbio);
2637 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2638                 assert(s->wbio != NULL);
2639 #endif
2640         }
2641         BIO_free(s->bbio);
2642         s->bbio=NULL;
2643         }
2644
2645 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2646         {
2647         ctx->quiet_shutdown=mode;
2648         }
2649
2650 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2651         {
2652         return(ctx->quiet_shutdown);
2653         }
2654
2655 void SSL_set_quiet_shutdown(SSL *s,int mode)
2656         {
2657         s->quiet_shutdown=mode;
2658         }
2659
2660 int SSL_get_quiet_shutdown(const SSL *s)
2661         {
2662         return(s->quiet_shutdown);
2663         }
2664
2665 void SSL_set_shutdown(SSL *s,int mode)
2666         {
2667         s->shutdown=mode;
2668         }
2669
2670 int SSL_get_shutdown(const SSL *s)
2671         {
2672         return(s->shutdown);
2673         }
2674
2675 int SSL_version(const SSL *s)
2676         {
2677         return(s->version);
2678         }
2679
2680 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2681         {
2682         return(ssl->ctx);
2683         }
2684
2685 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2686         {
2687         if (ssl->ctx == ctx)
2688                 return ssl->ctx;
2689 #ifndef OPENSSL_NO_TLSEXT
2690         if (ctx == NULL)
2691                 ctx = ssl->initial_ctx;
2692 #endif
2693         if (ssl->cert != NULL)
2694                 ssl_cert_free(ssl->cert);
2695         ssl->cert = ssl_cert_dup(ctx->cert);
2696         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2697         if (ssl->ctx != NULL)
2698                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2699         ssl->ctx = ctx;
2700         return(ssl->ctx);
2701         }
2702
2703 #ifndef OPENSSL_NO_STDIO
2704 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2705         {
2706         return(X509_STORE_set_default_paths(ctx->cert_store));
2707         }
2708
2709 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2710                 const char *CApath)
2711         {
2712         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2713         }
2714 #endif
2715
2716 void SSL_set_info_callback(SSL *ssl,
2717         void (*cb)(const SSL *ssl,int type,int val))
2718         {
2719         ssl->info_callback=cb;
2720         }
2721
2722 /* One compiler (Diab DCC) doesn't like argument names in returned
2723    function pointer.  */
2724 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2725         {
2726         return ssl->info_callback;
2727         }
2728
2729 int SSL_state(const SSL *ssl)
2730         {
2731         return(ssl->state);
2732         }
2733
2734 void SSL_set_verify_result(SSL *ssl,long arg)
2735         {
2736         ssl->verify_result=arg;
2737         }
2738
2739 long SSL_get_verify_result(const SSL *ssl)
2740         {
2741         return(ssl->verify_result);
2742         }
2743
2744 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2745                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2746         {
2747         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2748                                 new_func, dup_func, free_func);
2749         }
2750
2751 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2752         {
2753         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2754         }
2755
2756 void *SSL_get_ex_data(const SSL *s,int idx)
2757         {
2758         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2759         }
2760
2761 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2762                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2763         {
2764         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2765                                 new_func, dup_func, free_func);
2766         }
2767
2768 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2769         {
2770         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2771         }
2772
2773 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2774         {
2775         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2776         }
2777
2778 int ssl_ok(SSL *s)
2779         {
2780         return(1);
2781         }
2782
2783 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2784         {
2785         return(ctx->cert_store);
2786         }
2787
2788 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2789         {
2790         if (ctx->cert_store != NULL)
2791                 X509_STORE_free(ctx->cert_store);
2792         ctx->cert_store=store;
2793         }
2794
2795 int SSL_want(const SSL *s)
2796         {
2797         return(s->rwstate);
2798         }
2799
2800 /*!
2801  * \brief Set the callback for generating temporary RSA keys.
2802  * \param ctx the SSL context.
2803  * \param cb the callback
2804  */
2805
2806 #ifndef OPENSSL_NO_RSA
2807 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2808                                                           int is_export,
2809                                                           int keylength))
2810     {
2811     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2812     }
2813
2814 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2815                                                   int is_export,
2816                                                   int keylength))
2817     {
2818     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2819     }
2820 #endif
2821
2822 #ifdef DOXYGEN
2823 /*!
2824  * \brief The RSA temporary key callback function.
2825  * \param ssl the SSL session.
2826  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2827  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2828  * of the required key in bits.
2829  * \return the temporary RSA key.
2830  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2831  */
2832
2833 RSA *cb(SSL *ssl,int is_export,int keylength)
2834     {}
2835 #endif
2836
2837 /*!
2838  * \brief Set the callback for generating temporary DH keys.
2839  * \param ctx the SSL context.
2840  * \param dh the callback
2841  */
2842
2843 #ifndef OPENSSL_NO_DH
2844 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2845                                                         int keylength))
2846         {
2847         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2848         }
2849
2850 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2851                                                 int keylength))
2852         {
2853         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2854         }
2855 #endif
2856
2857 #ifndef OPENSSL_NO_ECDH
2858 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2859                                                                 int keylength))
2860         {
2861         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2862         }
2863
2864 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2865                                                         int keylength))
2866         {
2867         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2868         }
2869 #endif
2870
2871 #ifndef OPENSSL_NO_PSK
2872 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2873         {
2874         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2875                 {
2876                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2877                 return 0;
2878                 }
2879         if (ctx->psk_identity_hint != NULL)
2880                 OPENSSL_free(ctx->psk_identity_hint);
2881         if (identity_hint != NULL)
2882                 {
2883                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2884                 if (ctx->psk_identity_hint == NULL)
2885                         return 0;
2886                 }
2887         else
2888                 ctx->psk_identity_hint = NULL;
2889         return 1;
2890         }
2891
2892 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2893         {
2894         if (s == NULL)
2895                 return 0;
2896
2897         if (s->session == NULL)
2898                 return 1; /* session not created yet, ignored */
2899
2900         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2901                 {
2902                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2903                 return 0;
2904                 }
2905         if (s->session->psk_identity_hint != NULL)
2906                 OPENSSL_free(s->session->psk_identity_hint);
2907         if (identity_hint != NULL)
2908                 {
2909                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2910                 if (s->session->psk_identity_hint == NULL)
2911                         return 0;
2912                 }
2913         else
2914                 s->session->psk_identity_hint = NULL;
2915         return 1;
2916         }
2917
2918 const char *SSL_get_psk_identity_hint(const SSL *s)
2919         {
2920         if (s == NULL || s->session == NULL)
2921                 return NULL;
2922         return(s->session->psk_identity_hint);
2923         }
2924
2925 const char *SSL_get_psk_identity(const SSL *s)
2926         {
2927         if (s == NULL || s->session == NULL)
2928                 return NULL;
2929         return(s->session->psk_identity);
2930         }
2931
2932 void SSL_set_psk_client_callback(SSL *s,
2933     unsigned int (*cb)(SSL *ssl, const char *hint,
2934                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2935                        unsigned int max_psk_len))
2936         {
2937         s->psk_client_callback = cb;
2938         }
2939
2940 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2941     unsigned int (*cb)(SSL *ssl, const char *hint,
2942                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2943                        unsigned int max_psk_len))
2944         {
2945         ctx->psk_client_callback = cb;
2946         }
2947
2948 void SSL_set_psk_server_callback(SSL *s,
2949     unsigned int (*cb)(SSL *ssl, const char *identity,
2950                        unsigned char *psk, unsigned int max_psk_len))
2951         {
2952         s->psk_server_callback = cb;
2953         }
2954
2955 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2956     unsigned int (*cb)(SSL *ssl, const char *identity,
2957                        unsigned char *psk, unsigned int max_psk_len))
2958         {
2959         ctx->psk_server_callback = cb;
2960         }
2961 #endif
2962
2963 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))
2964         {
2965         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2966         }
2967 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))
2968         {
2969         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2970         }
2971
2972 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2973  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2974  * any. If EVP_MD pointer is passed, initializes ctx with this md
2975  * Returns newly allocated ctx;
2976  */
2977
2978 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
2979 {
2980         ssl_clear_hash_ctx(hash);
2981         *hash = EVP_MD_CTX_create();
2982         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2983         return *hash;
2984 }
2985 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
2986 {
2987
2988         if (*hash) EVP_MD_CTX_destroy(*hash);
2989         *hash=NULL;
2990 }
2991
2992 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2993 #include "../crypto/bio/bss_file.c"
2994 #endif
2995
2996 IMPLEMENT_STACK_OF(SSL_CIPHER)
2997 IMPLEMENT_STACK_OF(SSL_COMP)
2998 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
2999                                     ssl_cipher_id);
3000