ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function
 180         };
 181
 182 int SSL_clear(SSL *s)
 183         {
 184
 185         if (s->method == NULL)
 186                 {
 187                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 188                 return(0);
 189                 }
 190
 191         if (ssl_clear_bad_session(s))
 192                 {
 193                 SSL_SESSION_free(s->session);
 194                 s->session=NULL;
 195                 }
 196
 197         s->error=0;
 198         s->hit=0;
 199         s->shutdown=0;
 200
 201 #if 0 /* Disabled since version 1.10 of this file (early return not
 202        * needed because SSL_clear is not called when doing renegotiation) */
 203         /* This is set if we are doing dynamic renegotiation so keep
 204          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 205         if (s->new_session) return(1);
 206 #else
 207         if (s->new_session)
 208                 {
 209                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 210                 return 0;
 211                 }
 212 #endif
 213
 214         s->type=0;
 215
 216         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 217
 218         s->version=s->method->version;
 219         s->client_version=s->version;
 220         s->rwstate=SSL_NOTHING;
 221         s->rstate=SSL_ST_READ_HEADER;
 222 #if 0
 223         s->read_ahead=s->ctx->read_ahead;
 224 #endif
 225
 226         if (s->init_buf != NULL)
 227                 {
 228                 BUF_MEM_free(s->init_buf);
 229                 s->init_buf=NULL;
 230                 }
 231
 232         ssl_clear_cipher_ctx(s);
 233         ssl_clear_hash_ctx(&s->read_hash);
 234         ssl_clear_hash_ctx(&s->write_hash);
 235
 236         s->first_packet=0;
 237
 238 #if 1
 239         /* Check to see if we were changed into a different method, if
 240          * so, revert back if we are not doing session-id reuse. */
 241         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 242                 {
 243                 s->method->ssl_free(s);
 244                 s->method=s->ctx->method;
 245                 if (!s->method->ssl_new(s))
 246                         return(0);
 247                 }
 248         else
 249 #endif
 250                 s->method->ssl_clear(s);
 251         return(1);
 252         }
 253
 254 /** Used to change an SSL_CTXs default SSL method type */
 255 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 256         {
 257         STACK_OF(SSL_CIPHER) *sk;
 258
 259         ctx->method=meth;
 260
 261         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 262                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 263         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 264                 {
 265                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 266                 return(0);
 267                 }
 268         return(1);
 269         }
 270
 271 SSL *SSL_new(SSL_CTX *ctx)
 272         {
 273         SSL *s;
 274
 275         if (ctx == NULL)
 276                 {
 277                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 278                 return(NULL);
 279                 }
 280         if (ctx->method == NULL)
 281                 {
 282                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 283                 return(NULL);
 284                 }
 285
 286         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 287         if (s == NULL) goto err;
 288         memset(s,0,sizeof(SSL));
 289
 290 #ifndef OPENSSL_NO_KRB5
 291         s->kssl_ctx = kssl_ctx_new();
 292 #endif  /* OPENSSL_NO_KRB5 */
 293
 294         s->options=ctx->options;
 295         s->mode=ctx->mode;
 296         s->max_cert_list=ctx->max_cert_list;
 297
 298         if (ctx->cert != NULL)
 299                 {
 300                 /* Earlier library versions used to copy the pointer to
 301                  * the CERT, not its contents; only when setting new
 302                  * parameters for the per-SSL copy, ssl_cert_new would be
 303                  * called (and the direct reference to the per-SSL_CTX
 304                  * settings would be lost, but those still were indirectly
 305                  * accessed for various purposes, and for that reason they
 306                  * used to be known as s->ctx->default_cert).
 307                  * Now we don't look at the SSL_CTX's CERT after having
 308                  * duplicated it once. */
 309
 310                 s->cert = ssl_cert_dup(ctx->cert);
 311                 if (s->cert == NULL)
 312                         goto err;
 313                 }
 314         else
 315                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 316
 317         s->read_ahead=ctx->read_ahead;
 318         s->msg_callback=ctx->msg_callback;
 319         s->msg_callback_arg=ctx->msg_callback_arg;
 320         s->verify_mode=ctx->verify_mode;
 321 #if 0
 322         s->verify_depth=ctx->verify_depth;
 323 #endif
 324         s->sid_ctx_length=ctx->sid_ctx_length;
 325         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 326         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 327         s->verify_callback=ctx->default_verify_callback;
 328         s->generate_session_id=ctx->generate_session_id;
 329
 330         s->param = X509_VERIFY_PARAM_new();
 331         if (!s->param)
 332                 goto err;
 333         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 334 #if 0
 335         s->purpose = ctx->purpose;
 336         s->trust = ctx->trust;
 337 #endif
 338         s->quiet_shutdown=ctx->quiet_shutdown;
 339         s->max_send_fragment = ctx->max_send_fragment;
 340
 341         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 342         s->ctx=ctx;
 343 #ifndef OPENSSL_NO_TLSEXT
 344         s->tlsext_debug_cb = 0;
 345         s->tlsext_debug_arg = NULL;
 346         s->tlsext_ticket_expected = 0;
 347         s->tlsext_status_type = -1;
 348         s->tlsext_status_expected = 0;
 349         s->tlsext_ocsp_ids = NULL;
 350         s->tlsext_ocsp_exts = NULL;
 351         s->tlsext_ocsp_resp = NULL;
 352         s->tlsext_ocsp_resplen = -1;
 353         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 354         s->initial_ctx=ctx;
 355 #endif
 356
 357         s->verify_result=X509_V_OK;
 358
 359         s->method=ctx->method;
 360
 361         if (!s->method->ssl_new(s))
 362                 goto err;
 363
 364         s->references=1;
 365         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 366
 367         SSL_clear(s);
 368
 369         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 370
 371 #ifndef OPENSSL_NO_PSK
 372         s->psk_client_callback=ctx->psk_client_callback;
 373         s->psk_server_callback=ctx->psk_server_callback;
 374 #endif
 375
 376         return(s);
 377 err:
 378         if (s != NULL)
 379                 {
 380                 if (s->cert != NULL)
 381                         ssl_cert_free(s->cert);
 382                 if (s->ctx != NULL)
 383                         SSL_CTX_free(s->ctx); /* decrement reference count */
 384                 OPENSSL_free(s);
 385                 }
 386         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 387         return(NULL);
 388         }
 389
 390 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 391                                    unsigned int sid_ctx_len)
 392     {
 393     if(sid_ctx_len > sizeof ctx->sid_ctx)
 394         {
 395         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 396         return 0;
 397         }
 398     ctx->sid_ctx_length=sid_ctx_len;
 399     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 400
 401     return 1;
 402     }
 403
 404 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 405                                unsigned int sid_ctx_len)
 406     {
 407     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 408         {
 409         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 410         return 0;
 411         }
 412     ssl->sid_ctx_length=sid_ctx_len;
 413     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 414
 415     return 1;
 416     }
 417
 418 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 419         {
 420         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 421         ctx->generate_session_id = cb;
 422         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 423         return 1;
 424         }
 425
 426 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 427         {
 428         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 429         ssl->generate_session_id = cb;
 430         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 431         return 1;
 432         }
 433
 434 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 435                                 unsigned int id_len)
 436         {
 437         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 438          * we can "construct" a session to give us the desired check - ie. to
 439          * find if there's a session in the hash table that would conflict with
 440          * any new session built out of this id/id_len and the ssl_version in
 441          * use by this SSL. */
 442         SSL_SESSION r, *p;
 443
 444         if(id_len > sizeof r.session_id)
 445                 return 0;
 446
 447         r.ssl_version = ssl->version;
 448         r.session_id_length = id_len;
 449         memcpy(r.session_id, id, id_len);
 450         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 451          * callback is calling us to check the uniqueness of a shorter ID, it
 452          * must be compared as a padded-out ID because that is what it will be
 453          * converted to when the callback has finished choosing it. */
 454         if((r.ssl_version == SSL2_VERSION) &&
 455                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 456                 {
 457                 memset(r.session_id + id_len, 0,
 458                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 459                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 460                 }
 461
 462         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 463         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 464         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 465         return (p != NULL);
 466         }
 467
 468 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 469         {
 470         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 471         }
 472
 473 int SSL_set_purpose(SSL *s, int purpose)
 474         {
 475         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 476         }
 477
 478 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 479         {
 480         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 481         }
 482
 483 int SSL_set_trust(SSL *s, int trust)
 484         {
 485         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 486         }
 487
 488 void SSL_free(SSL *s)
 489         {
 490         int i;
 491
 492         if(s == NULL)
 493             return;
 494
 495         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 496 #ifdef REF_PRINT
 497         REF_PRINT("SSL",s);
 498 #endif
 499         if (i > 0) return;
 500 #ifdef REF_CHECK
 501         if (i < 0)
 502                 {
 503                 fprintf(stderr,"SSL_free, bad reference count\n");
 504                 abort(); /* ok */
 505                 }
 506 #endif
 507
 508         if (s->param)
 509                 X509_VERIFY_PARAM_free(s->param);
 510
 511         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 512
 513         if (s->bbio != NULL)
 514                 {
 515                 /* If the buffering BIO is in place, pop it off */
 516                 if (s->bbio == s->wbio)
 517                         {
 518                         s->wbio=BIO_pop(s->wbio);
 519                         }
 520                 BIO_free(s->bbio);
 521                 s->bbio=NULL;
 522                 }
 523         if (s->rbio != NULL)
 524                 BIO_free_all(s->rbio);
 525         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 526                 BIO_free_all(s->wbio);
 527
 528         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 529
 530         /* add extra stuff */
 531         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 532         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 533
 534         /* Make the next call work :-) */
 535         if (s->session != NULL)
 536                 {
 537                 ssl_clear_bad_session(s);
 538                 SSL_SESSION_free(s->session);
 539                 }
 540
 541         ssl_clear_cipher_ctx(s);
 542         ssl_clear_hash_ctx(&s->read_hash);
 543         ssl_clear_hash_ctx(&s->write_hash);
 544
 545         if (s->cert != NULL) ssl_cert_free(s->cert);
 546         /* Free up if allocated */
 547
 548         if (s->ctx) SSL_CTX_free(s->ctx);
 549 #ifndef OPENSSL_NO_TLSEXT
 550         if (s->tlsext_hostname)
 551                 OPENSSL_free(s->tlsext_hostname);
 552         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 553 #ifndef OPENSSL_NO_EC
 554         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 555         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 556 #endif /* OPENSSL_NO_EC */
 557         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 558         if (s->tlsext_ocsp_exts)
 559                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 560                                                 X509_EXTENSION_free);
 561         if (s->tlsext_ocsp_ids)
 562                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 563         if (s->tlsext_ocsp_resp)
 564                 OPENSSL_free(s->tlsext_ocsp_resp);
 565 #endif
 566
 567         if (s->client_CA != NULL)
 568                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 569
 570         if (s->method != NULL) s->method->ssl_free(s);
 571
 572 #ifndef OPENSSL_NO_KRB5
 573         if (s->kssl_ctx != NULL)
 574                 kssl_ctx_free(s->kssl_ctx);
 575 #endif  /* OPENSSL_NO_KRB5 */
 576
 577         OPENSSL_free(s);
 578         }
 579
 580 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 581         {
 582         /* If the output buffering BIO is still in place, remove it
 583          */
 584         if (s->bbio != NULL)
 585                 {
 586                 if (s->wbio == s->bbio)
 587                         {
 588                         s->wbio=s->wbio->next_bio;
 589                         s->bbio->next_bio=NULL;
 590                         }
 591                 }
 592         if ((s->rbio != NULL) && (s->rbio != rbio))
 593                 BIO_free_all(s->rbio);
 594         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 595                 BIO_free_all(s->wbio);
 596         s->rbio=rbio;
 597         s->wbio=wbio;
 598         }
 599
 600 BIO *SSL_get_rbio(const SSL *s)
 601         { return(s->rbio); }
 602
 603 BIO *SSL_get_wbio(const SSL *s)
 604         { return(s->wbio); }
 605
 606 int SSL_get_fd(const SSL *s)
 607         {
 608         return(SSL_get_rfd(s));
 609         }
 610
 611 int SSL_get_rfd(const SSL *s)
 612         {
 613         int ret= -1;
 614         BIO *b,*r;
 615
 616         b=SSL_get_rbio(s);
 617         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 618         if (r != NULL)
 619                 BIO_get_fd(r,&ret);
 620         return(ret);
 621         }
 622
 623 int SSL_get_wfd(const SSL *s)
 624         {
 625         int ret= -1;
 626         BIO *b,*r;
 627
 628         b=SSL_get_wbio(s);
 629         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 630         if (r != NULL)
 631                 BIO_get_fd(r,&ret);
 632         return(ret);
 633         }
 634
 635 #ifndef OPENSSL_NO_SOCK
 636 int SSL_set_fd(SSL *s,int fd)
 637         {
 638         int ret=0;
 639         BIO *bio=NULL;
 640
 641         bio=BIO_new(BIO_s_socket());
 642
 643         if (bio == NULL)
 644                 {
 645                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 646                 goto err;
 647                 }
 648         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 649         SSL_set_bio(s,bio,bio);
 650         ret=1;
 651 err:
 652         return(ret);
 653         }
 654
 655 int SSL_set_wfd(SSL *s,int fd)
 656         {
 657         int ret=0;
 658         BIO *bio=NULL;
 659
 660         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 661                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 662                 {
 663                 bio=BIO_new(BIO_s_socket());
 664
 665                 if (bio == NULL)
 666                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 667                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 668                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 669                 }
 670         else
 671                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 672         ret=1;
 673 err:
 674         return(ret);
 675         }
 676
 677 int SSL_set_rfd(SSL *s,int fd)
 678         {
 679         int ret=0;
 680         BIO *bio=NULL;
 681
 682         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 683                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 684                 {
 685                 bio=BIO_new(BIO_s_socket());
 686
 687                 if (bio == NULL)
 688                         {
 689                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 690                         goto err;
 691                         }
 692                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 693                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 694                 }
 695         else
 696                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 697         ret=1;
 698 err:
 699         return(ret);
 700         }
 701 #endif
 702
 703
 704 /* return length of latest Finished message we sent, copy to 'buf' */
 705 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 706         {
 707         size_t ret = 0;
 708
 709         if (s->s3 != NULL)
 710                 {
 711                 ret = s->s3->tmp.finish_md_len;
 712                 if (count > ret)
 713                         count = ret;
 714                 memcpy(buf, s->s3->tmp.finish_md, count);
 715                 }
 716         return ret;
 717         }
 718
 719 /* return length of latest Finished message we expected, copy to 'buf' */
 720 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 721         {
 722         size_t ret = 0;
 723
 724         if (s->s3 != NULL)
 725                 {
 726                 ret = s->s3->tmp.peer_finish_md_len;
 727                 if (count > ret)
 728                         count = ret;
 729                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 730                 }
 731         return ret;
 732         }
 733
 734
 735 int SSL_get_verify_mode(const SSL *s)
 736         {
 737         return(s->verify_mode);
 738         }
 739
 740 int SSL_get_verify_depth(const SSL *s)
 741         {
 742         return X509_VERIFY_PARAM_get_depth(s->param);
 743         }
 744
 745 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 746         {
 747         return(s->verify_callback);
 748         }
 749
 750 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 751         {
 752         return(ctx->verify_mode);
 753         }
 754
 755 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 756         {
 757         return X509_VERIFY_PARAM_get_depth(ctx->param);
 758         }
 759
 760 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 761         {
 762         return(ctx->default_verify_callback);
 763         }
 764
 765 void SSL_set_verify(SSL *s,int mode,
 766                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 767         {
 768         s->verify_mode=mode;
 769         if (callback != NULL)
 770                 s->verify_callback=callback;
 771         }
 772
 773 void SSL_set_verify_depth(SSL *s,int depth)
 774         {
 775         X509_VERIFY_PARAM_set_depth(s->param, depth);
 776         }
 777
 778 void SSL_set_read_ahead(SSL *s,int yes)
 779         {
 780         s->read_ahead=yes;
 781         }
 782
 783 int SSL_get_read_ahead(const SSL *s)
 784         {
 785         return(s->read_ahead);
 786         }
 787
 788 int SSL_pending(const SSL *s)
 789         {
 790         /* SSL_pending cannot work properly if read-ahead is enabled
 791          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 792          * and it is impossible to fix since SSL_pending cannot report
 793          * errors that may be observed while scanning the new data.
 794          * (Note that SSL_pending() is often used as a boolean value,
 795          * so we'd better not return -1.)
 796          */
 797         return(s->method->ssl_pending(s));
 798         }
 799
 800 X509 *SSL_get_peer_certificate(const SSL *s)
 801         {
 802         X509 *r;
 803
 804         if ((s == NULL) || (s->session == NULL))
 805                 r=NULL;
 806         else
 807                 r=s->session->peer;
 808
 809         if (r == NULL) return(r);
 810
 811         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 812
 813         return(r);
 814         }
 815
 816 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 817         {
 818         STACK_OF(X509) *r;
 819
 820         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 821                 r=NULL;
 822         else
 823                 r=s->session->sess_cert->cert_chain;
 824
 825         /* If we are a client, cert_chain includes the peer's own
 826          * certificate; if we are a server, it does not. */
 827
 828         return(r);
 829         }
 830
 831 /* Now in theory, since the calling process own 't' it should be safe to
 832  * modify.  We need to be able to read f without being hassled */
 833 void SSL_copy_session_id(SSL *t,const SSL *f)
 834         {
 835         CERT *tmp;
 836
 837         /* Do we need to to SSL locking? */
 838         SSL_set_session(t,SSL_get_session(f));
 839
 840         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 841          * vice-versa */
 842         if (t->method != f->method)
 843                 {
 844                 t->method->ssl_free(t); /* cleanup current */
 845                 t->method=f->method;    /* change method */
 846                 t->method->ssl_new(t);  /* setup new */
 847                 }
 848
 849         tmp=t->cert;
 850         if (f->cert != NULL)
 851                 {
 852                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 853                 t->cert=f->cert;
 854                 }
 855         else
 856                 t->cert=NULL;
 857         if (tmp != NULL) ssl_cert_free(tmp);
 858         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 859         }
 860
 861 /* Fix this so it checks all the valid key/cert options */
 862 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 863         {
 864         if (    (ctx == NULL) ||
 865                 (ctx->cert == NULL) ||
 866                 (ctx->cert->key->x509 == NULL))
 867                 {
 868                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 869                 return(0);
 870                 }
 871         if      (ctx->cert->key->privatekey == NULL)
 872                 {
 873                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 874                 return(0);
 875                 }
 876         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 877         }
 878
 879 /* Fix this function so that it takes an optional type parameter */
 880 int SSL_check_private_key(const SSL *ssl)
 881         {
 882         if (ssl == NULL)
 883                 {
 884                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 885                 return(0);
 886                 }
 887         if (ssl->cert == NULL)
 888                 {
 889                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 890                 return 0;
 891                 }
 892         if (ssl->cert->key->x509 == NULL)
 893                 {
 894                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 895                 return(0);
 896                 }
 897         if (ssl->cert->key->privatekey == NULL)
 898                 {
 899                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 900                 return(0);
 901                 }
 902         return(X509_check_private_key(ssl->cert->key->x509,
 903                 ssl->cert->key->privatekey));
 904         }
 905
 906 int SSL_accept(SSL *s)
 907         {
 908         if (s->handshake_func == 0)
 909                 /* Not properly initialized yet */
 910                 SSL_set_accept_state(s);
 911
 912         return(s->method->ssl_accept(s));
 913         }
 914
 915 int SSL_connect(SSL *s)
 916         {
 917         if (s->handshake_func == 0)
 918                 /* Not properly initialized yet */
 919                 SSL_set_connect_state(s);
 920
 921         return(s->method->ssl_connect(s));
 922         }
 923
 924 long SSL_get_default_timeout(const SSL *s)
 925         {
 926         return(s->method->get_timeout());
 927         }
 928
 929 int SSL_read(SSL *s,void *buf,int num)
 930         {
 931         if (s->handshake_func == 0)
 932                 {
 933                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 934                 return -1;
 935                 }
 936
 937         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 938                 {
 939                 s->rwstate=SSL_NOTHING;
 940                 return(0);
 941                 }
 942         return(s->method->ssl_read(s,buf,num));
 943         }
 944
 945 int SSL_peek(SSL *s,void *buf,int num)
 946         {
 947         if (s->handshake_func == 0)
 948                 {
 949                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 950                 return -1;
 951                 }
 952
 953         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 954                 {
 955                 return(0);
 956                 }
 957         return(s->method->ssl_peek(s,buf,num));
 958         }
 959
 960 int SSL_write(SSL *s,const void *buf,int num)
 961         {
 962         if (s->handshake_func == 0)
 963                 {
 964                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 965                 return -1;
 966                 }
 967
 968         if (s->shutdown & SSL_SENT_SHUTDOWN)
 969                 {
 970                 s->rwstate=SSL_NOTHING;
 971                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 972                 return(-1);
 973                 }
 974         return(s->method->ssl_write(s,buf,num));
 975         }
 976
 977 int SSL_shutdown(SSL *s)
 978         {
 979         /* Note that this function behaves differently from what one might
 980          * expect.  Return values are 0 for no success (yet),
 981          * 1 for success; but calling it once is usually not enough,
 982          * even if blocking I/O is used (see ssl3_shutdown).
 983          */
 984
 985         if (s->handshake_func == 0)
 986                 {
 987                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 988                 return -1;
 989                 }
 990
 991         if ((s != NULL) && !SSL_in_init(s))
 992                 return(s->method->ssl_shutdown(s));
 993         else
 994                 return(1);
 995         }
 996
 997 int SSL_renegotiate(SSL *s)
 998         {
 999         if (s->new_session == 0)
1000                 {
1001                 s->new_session=1;
1002                 }
1003         return(s->method->ssl_renegotiate(s));
1004         }
1005
1006 int SSL_renegotiate_pending(SSL *s)
1007         {
1008         /* becomes true when negotiation is requested;
1009          * false again once a handshake has finished */
1010         return (s->new_session != 0);
1011         }
1012
1013 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1014         {
1015         long l;
1016
1017         switch (cmd)
1018                 {
1019         case SSL_CTRL_GET_READ_AHEAD:
1020                 return(s->read_ahead);
1021         case SSL_CTRL_SET_READ_AHEAD:
1022                 l=s->read_ahead;
1023                 s->read_ahead=larg;
1024                 return(l);
1025
1026         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1027                 s->msg_callback_arg = parg;
1028                 return 1;
1029
1030         case SSL_CTRL_OPTIONS:
1031                 return(s->options|=larg);
1032         case SSL_CTRL_MODE:
1033                 return(s->mode|=larg);
1034         case SSL_CTRL_GET_MAX_CERT_LIST:
1035                 return(s->max_cert_list);
1036         case SSL_CTRL_SET_MAX_CERT_LIST:
1037                 l=s->max_cert_list;
1038                 s->max_cert_list=larg;
1039                 return(l);
1040         case SSL_CTRL_SET_MTU:
1041                 if (SSL_version(s) == DTLS1_VERSION ||
1042                     SSL_version(s) == DTLS1_BAD_VER)
1043                         {
1044                         s->d1->mtu = larg;
1045                         return larg;
1046                         }
1047                 return 0;
1048         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1049                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1050                         return 0;
1051                 s->max_send_fragment = larg;
1052                 return 1;
1053         default:
1054                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1055                 }
1056         }
1057
1058 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1059         {
1060         switch(cmd)
1061                 {
1062         case SSL_CTRL_SET_MSG_CALLBACK:
1063                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1064                 return 1;
1065
1066         default:
1067                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1068                 }
1069         }
1070
1071 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1072         {
1073         return ctx->sessions;
1074         }
1075
1076 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1077         {
1078         long l;
1079
1080         switch (cmd)
1081                 {
1082         case SSL_CTRL_GET_READ_AHEAD:
1083                 return(ctx->read_ahead);
1084         case SSL_CTRL_SET_READ_AHEAD:
1085                 l=ctx->read_ahead;
1086                 ctx->read_ahead=larg;
1087                 return(l);
1088
1089         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1090                 ctx->msg_callback_arg = parg;
1091                 return 1;
1092
1093         case SSL_CTRL_GET_MAX_CERT_LIST:
1094                 return(ctx->max_cert_list);
1095         case SSL_CTRL_SET_MAX_CERT_LIST:
1096                 l=ctx->max_cert_list;
1097                 ctx->max_cert_list=larg;
1098                 return(l);
1099
1100         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1101                 l=ctx->session_cache_size;
1102                 ctx->session_cache_size=larg;
1103                 return(l);
1104         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1105                 return(ctx->session_cache_size);
1106         case SSL_CTRL_SET_SESS_CACHE_MODE:
1107                 l=ctx->session_cache_mode;
1108                 ctx->session_cache_mode=larg;
1109                 return(l);
1110         case SSL_CTRL_GET_SESS_CACHE_MODE:
1111                 return(ctx->session_cache_mode);
1112
1113         case SSL_CTRL_SESS_NUMBER:
1114                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1115         case SSL_CTRL_SESS_CONNECT:
1116                 return(ctx->stats.sess_connect);
1117         case SSL_CTRL_SESS_CONNECT_GOOD:
1118                 return(ctx->stats.sess_connect_good);
1119         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1120                 return(ctx->stats.sess_connect_renegotiate);
1121         case SSL_CTRL_SESS_ACCEPT:
1122                 return(ctx->stats.sess_accept);
1123         case SSL_CTRL_SESS_ACCEPT_GOOD:
1124                 return(ctx->stats.sess_accept_good);
1125         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1126                 return(ctx->stats.sess_accept_renegotiate);
1127         case SSL_CTRL_SESS_HIT:
1128                 return(ctx->stats.sess_hit);
1129         case SSL_CTRL_SESS_CB_HIT:
1130                 return(ctx->stats.sess_cb_hit);
1131         case SSL_CTRL_SESS_MISSES:
1132                 return(ctx->stats.sess_miss);
1133         case SSL_CTRL_SESS_TIMEOUTS:
1134                 return(ctx->stats.sess_timeout);
1135         case SSL_CTRL_SESS_CACHE_FULL:
1136                 return(ctx->stats.sess_cache_full);
1137         case SSL_CTRL_OPTIONS:
1138                 return(ctx->options|=larg);
1139         case SSL_CTRL_MODE:
1140                 return(ctx->mode|=larg);
1141         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1142                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1143                         return 0;
1144                 ctx->max_send_fragment = larg;
1145                 return 1;
1146         default:
1147                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1148                 }
1149         }
1150
1151 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1152         {
1153         switch(cmd)
1154                 {
1155         case SSL_CTRL_SET_MSG_CALLBACK:
1156                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1157                 return 1;
1158
1159         default:
1160                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1161                 }
1162         }
1163
1164 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1165         {
1166         long l;
1167
1168         l=a->id-b->id;
1169         if (l == 0L)
1170                 return(0);
1171         else
1172                 return((l > 0)?1:-1);
1173         }
1174
1175 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1176                         const SSL_CIPHER * const *bp)
1177         {
1178         long l;
1179
1180         l=(*ap)->id-(*bp)->id;
1181         if (l == 0L)
1182                 return(0);
1183         else
1184                 return((l > 0)?1:-1);
1185         }
1186
1187 /** return a STACK of the ciphers available for the SSL and in order of
1188  * preference */
1189 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1190         {
1191         if (s != NULL)
1192                 {
1193                 if (s->cipher_list != NULL)
1194                         {
1195                         return(s->cipher_list);
1196                         }
1197                 else if ((s->ctx != NULL) &&
1198                         (s->ctx->cipher_list != NULL))
1199                         {
1200                         return(s->ctx->cipher_list);
1201                         }
1202                 }
1203         return(NULL);
1204         }
1205
1206 /** return a STACK of the ciphers available for the SSL and in order of
1207  * algorithm id */
1208 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1209         {
1210         if (s != NULL)
1211                 {
1212                 if (s->cipher_list_by_id != NULL)
1213                         {
1214                         return(s->cipher_list_by_id);
1215                         }
1216                 else if ((s->ctx != NULL) &&
1217                         (s->ctx->cipher_list_by_id != NULL))
1218                         {
1219                         return(s->ctx->cipher_list_by_id);
1220                         }
1221                 }
1222         return(NULL);
1223         }
1224
1225 /** The old interface to get the same thing as SSL_get_ciphers() */
1226 const char *SSL_get_cipher_list(const SSL *s,int n)
1227         {
1228         SSL_CIPHER *c;
1229         STACK_OF(SSL_CIPHER) *sk;
1230
1231         if (s == NULL) return(NULL);
1232         sk=SSL_get_ciphers(s);
1233         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1234                 return(NULL);
1235         c=sk_SSL_CIPHER_value(sk,n);
1236         if (c == NULL) return(NULL);
1237         return(c->name);
1238         }
1239
1240 /** specify the ciphers to be used by default by the SSL_CTX */
1241 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1242         {
1243         STACK_OF(SSL_CIPHER) *sk;
1244
1245         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1246                 &ctx->cipher_list_by_id,str);
1247         /* ssl_create_cipher_list may return an empty stack if it
1248          * was unable to find a cipher matching the given rule string
1249          * (for example if the rule string specifies a cipher which
1250          * has been disabled). This is not an error as far as
1251          * ssl_create_cipher_list is concerned, and hence
1252          * ctx->cipher_list and ctx->cipher_list_by_id has been
1253          * updated. */
1254         if (sk == NULL)
1255                 return 0;
1256         else if (sk_SSL_CIPHER_num(sk) == 0)
1257                 {
1258                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1259                 return 0;
1260                 }
1261         return 1;
1262         }
1263
1264 /** specify the ciphers to be used by the SSL */
1265 int SSL_set_cipher_list(SSL *s,const char *str)
1266         {
1267         STACK_OF(SSL_CIPHER) *sk;
1268
1269         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1270                 &s->cipher_list_by_id,str);
1271         /* see comment in SSL_CTX_set_cipher_list */
1272         if (sk == NULL)
1273                 return 0;
1274         else if (sk_SSL_CIPHER_num(sk) == 0)
1275                 {
1276                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1277                 return 0;
1278                 }
1279         return 1;
1280         }
1281
1282 /* works well for SSLv2, not so good for SSLv3 */
1283 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1284         {
1285         char *p;
1286         STACK_OF(SSL_CIPHER) *sk;
1287         SSL_CIPHER *c;
1288         int i;
1289
1290         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1291                 (len < 2))
1292                 return(NULL);
1293
1294         p=buf;
1295         sk=s->session->ciphers;
1296         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1297                 {
1298                 int n;
1299
1300                 c=sk_SSL_CIPHER_value(sk,i);
1301                 n=strlen(c->name);
1302                 if (n+1 > len)
1303                         {
1304                         if (p != buf)
1305                                 --p;
1306                         *p='\0';
1307                         return buf;
1308                         }
1309                 strcpy(p,c->name);
1310                 p+=n;
1311                 *(p++)=':';
1312                 len-=n+1;
1313                 }
1314         p[-1]='\0';
1315         return(buf);
1316         }
1317
1318 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1319                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1320         {
1321         int i,j=0;
1322         SSL_CIPHER *c;
1323         unsigned char *q;
1324 #ifndef OPENSSL_NO_KRB5
1325         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1326 #endif /* OPENSSL_NO_KRB5 */
1327
1328         if (sk == NULL) return(0);
1329         q=p;
1330
1331         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1332                 {
1333                 c=sk_SSL_CIPHER_value(sk,i);
1334 #ifndef OPENSSL_NO_KRB5
1335                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1336                     nokrb5)
1337                     continue;
1338 #endif /* OPENSSL_NO_KRB5 */
1339 #ifndef OPENSSL_NO_PSK
1340                 /* with PSK there must be client callback set */
1341                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1342                     s->psk_client_callback == NULL)
1343                         continue;
1344 #endif /* OPENSSL_NO_PSK */
1345                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1346                 p+=j;
1347                 }
1348         return(p-q);
1349         }
1350
1351 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1352                                                STACK_OF(SSL_CIPHER) **skp)
1353         {
1354         const SSL_CIPHER *c;
1355         STACK_OF(SSL_CIPHER) *sk;
1356         int i,n;
1357
1358         n=ssl_put_cipher_by_char(s,NULL,NULL);
1359         if ((num%n) != 0)
1360                 {
1361                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1362                 return(NULL);
1363                 }
1364         if ((skp == NULL) || (*skp == NULL))
1365                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1366         else
1367                 {
1368                 sk= *skp;
1369                 sk_SSL_CIPHER_zero(sk);
1370                 }
1371
1372         for (i=0; i<num; i+=n)
1373                 {
1374                 c=ssl_get_cipher_by_char(s,p);
1375                 p+=n;
1376                 if (c != NULL)
1377                         {
1378                         if (!sk_SSL_CIPHER_push(sk,c))
1379                                 {
1380                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1381                                 goto err;
1382                                 }
1383                         }
1384                 }
1385
1386         if (skp != NULL)
1387                 *skp=sk;
1388         return(sk);
1389 err:
1390         if ((skp == NULL) || (*skp == NULL))
1391                 sk_SSL_CIPHER_free(sk);
1392         return(NULL);
1393         }
1394
1395
1396 #ifndef OPENSSL_NO_TLSEXT
1397 /** return a servername extension value if provided in Client Hello, or NULL.
1398  * So far, only host_name types are defined (RFC 3546).
1399  */
1400
1401 const char *SSL_get_servername(const SSL *s, const int type)
1402         {
1403         if (type != TLSEXT_NAMETYPE_host_name)
1404                 return NULL;
1405
1406         return s->session && !s->tlsext_hostname ?
1407                 s->session->tlsext_hostname :
1408                 s->tlsext_hostname;
1409         }
1410
1411 int SSL_get_servername_type(const SSL *s)
1412         {
1413         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1414                 return TLSEXT_NAMETYPE_host_name;
1415         return -1;
1416         }
1417 #endif
1418
1419 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1420         {
1421         unsigned long l;
1422
1423         l=(unsigned long)
1424                 ((unsigned int) a->session_id[0]     )|
1425                 ((unsigned int) a->session_id[1]<< 8L)|
1426                 ((unsigned long)a->session_id[2]<<16L)|
1427                 ((unsigned long)a->session_id[3]<<24L);
1428         return(l);
1429         }
1430
1431 /* NB: If this function (or indeed the hash function which uses a sort of
1432  * coarser function than this one) is changed, ensure
1433  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1434  * able to construct an SSL_SESSION that will collide with any existing session
1435  * with a matching session ID. */
1436 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1437         {
1438         if (a->ssl_version != b->ssl_version)
1439                 return(1);
1440         if (a->session_id_length != b->session_id_length)
1441                 return(1);
1442         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1443         }
1444
1445 /* These wrapper functions should remain rather than redeclaring
1446  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1447  * variable. The reason is that the functions aren't static, they're exposed via
1448  * ssl.h. */
1449 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1450 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1451
1452 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1453         {
1454         SSL_CTX *ret=NULL;
1455
1456         if (meth == NULL)
1457                 {
1458                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1459                 return(NULL);
1460                 }
1461
1462         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1463                 {
1464                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1465                 goto err;
1466                 }
1467         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1468         if (ret == NULL)
1469                 goto err;
1470
1471         memset(ret,0,sizeof(SSL_CTX));
1472
1473         ret->method=meth;
1474
1475         ret->cert_store=NULL;
1476         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1477         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1478         ret->session_cache_head=NULL;
1479         ret->session_cache_tail=NULL;
1480
1481         /* We take the system default */
1482         ret->session_timeout=meth->get_timeout();
1483
1484         ret->new_session_cb=0;
1485         ret->remove_session_cb=0;
1486         ret->get_session_cb=0;
1487         ret->generate_session_id=0;
1488
1489         memset((char *)&ret->stats,0,sizeof(ret->stats));
1490
1491         ret->references=1;
1492         ret->quiet_shutdown=0;
1493
1494 /*      ret->cipher=NULL;*/
1495 /*      ret->s2->challenge=NULL;
1496         ret->master_key=NULL;
1497         ret->key_arg=NULL;
1498         ret->s2->conn_id=NULL; */
1499
1500         ret->info_callback=NULL;
1501
1502         ret->app_verify_callback=0;
1503         ret->app_verify_arg=NULL;
1504
1505         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1506         ret->read_ahead=0;
1507         ret->msg_callback=0;
1508         ret->msg_callback_arg=NULL;
1509         ret->verify_mode=SSL_VERIFY_NONE;
1510 #if 0
1511         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1512 #endif
1513         ret->sid_ctx_length=0;
1514         ret->default_verify_callback=NULL;
1515         if ((ret->cert=ssl_cert_new()) == NULL)
1516                 goto err;
1517
1518         ret->default_passwd_callback=0;
1519         ret->default_passwd_callback_userdata=NULL;
1520         ret->client_cert_cb=0;
1521         ret->app_gen_cookie_cb=0;
1522         ret->app_verify_cookie_cb=0;
1523
1524         ret->sessions=lh_SSL_SESSION_new();
1525         if (ret->sessions == NULL) goto err;
1526         ret->cert_store=X509_STORE_new();
1527         if (ret->cert_store == NULL) goto err;
1528
1529         ssl_create_cipher_list(ret->method,
1530                 &ret->cipher_list,&ret->cipher_list_by_id,
1531                 SSL_DEFAULT_CIPHER_LIST);
1532         if (ret->cipher_list == NULL
1533             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1534                 {
1535                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1536                 goto err2;
1537                 }
1538
1539         ret->param = X509_VERIFY_PARAM_new();
1540         if (!ret->param)
1541                 goto err;
1542
1543         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1544                 {
1545                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1546                 goto err2;
1547                 }
1548         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1549                 {
1550                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1551                 goto err2;
1552                 }
1553         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1554                 {
1555                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1556                 goto err2;
1557                 }
1558
1559         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1560                 goto err;
1561
1562         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1563
1564         ret->extra_certs=NULL;
1565         ret->comp_methods=SSL_COMP_get_compression_methods();
1566
1567         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1568
1569 #ifndef OPENSSL_NO_TLSEXT
1570         ret->tlsext_servername_callback = 0;
1571         ret->tlsext_servername_arg = NULL;
1572         /* Setup RFC4507 ticket keys */
1573         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1574                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1575                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1576                 ret->options |= SSL_OP_NO_TICKET;
1577
1578         ret->tlsext_status_cb = 0;
1579         ret->tlsext_status_arg = NULL;
1580
1581 #endif
1582 #ifndef OPENSSL_NO_PSK
1583         ret->psk_identity_hint=NULL;
1584         ret->psk_client_callback=NULL;
1585         ret->psk_server_callback=NULL;
1586 #endif
1587 #ifndef OPENSSL_NO_BUF_FREELISTS
1588         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1589         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1590         if (!ret->rbuf_freelist)
1591                 goto err;
1592         ret->rbuf_freelist->chunklen = 0;
1593         ret->rbuf_freelist->len = 0;
1594         ret->rbuf_freelist->head = NULL;
1595         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1596         if (!ret->wbuf_freelist)
1597                 {
1598                 OPENSSL_free(ret->rbuf_freelist);
1599                 goto err;
1600                 }
1601         ret->wbuf_freelist->chunklen = 0;
1602         ret->wbuf_freelist->len = 0;
1603         ret->wbuf_freelist->head = NULL;
1604 #endif
1605 #ifndef OPENSSL_NO_ENGINE
1606         ret->client_cert_engine = NULL;
1607 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1608 #define eng_strx(x)     #x
1609 #define eng_str(x)      eng_strx(x)
1610         /* Use specific client engine automatically... ignore errors */
1611         {
1612         ENGINE *eng;
1613         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1614         if (!eng)
1615                 {
1616                 ERR_clear_error();
1617                 ENGINE_load_builtin_engines();
1618                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1619                 }
1620         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1621                 ERR_clear_error();
1622         }
1623 #endif
1624 #endif
1625
1626         return(ret);
1627 err:
1628         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1629 err2:
1630         if (ret != NULL) SSL_CTX_free(ret);
1631         return(NULL);
1632         }
1633
1634 #if 0
1635 static void SSL_COMP_free(SSL_COMP *comp)
1636     { OPENSSL_free(comp); }
1637 #endif
1638
1639 #ifndef OPENSSL_NO_BUF_FREELISTS
1640 static void
1641 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1642         {
1643         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1644         for (ent = list->head; ent; ent = next)
1645                 {
1646                 next = ent->next;
1647                 OPENSSL_free(ent);
1648                 }
1649         OPENSSL_free(list);
1650         }
1651 #endif
1652
1653 void SSL_CTX_free(SSL_CTX *a)
1654         {
1655         int i;
1656
1657         if (a == NULL) return;
1658
1659         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1660 #ifdef REF_PRINT
1661         REF_PRINT("SSL_CTX",a);
1662 #endif
1663         if (i > 0) return;
1664 #ifdef REF_CHECK
1665         if (i < 0)
1666                 {
1667                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1668                 abort(); /* ok */
1669                 }
1670 #endif
1671
1672         if (a->param)
1673                 X509_VERIFY_PARAM_free(a->param);
1674
1675         /*
1676          * Free internal session cache. However: the remove_cb() may reference
1677          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1678          * after the sessions were flushed.
1679          * As the ex_data handling routines might also touch the session cache,
1680          * the most secure solution seems to be: empty (flush) the cache, then
1681          * free ex_data, then finally free the cache.
1682          * (See ticket [openssl.org #212].)
1683          */
1684         if (a->sessions != NULL)
1685                 SSL_CTX_flush_sessions(a,0);
1686
1687         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1688
1689         if (a->sessions != NULL)
1690                 lh_SSL_SESSION_free(a->sessions);
1691
1692         if (a->cert_store != NULL)
1693                 X509_STORE_free(a->cert_store);
1694         if (a->cipher_list != NULL)
1695                 sk_SSL_CIPHER_free(a->cipher_list);
1696         if (a->cipher_list_by_id != NULL)
1697                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1698         if (a->cert != NULL)
1699                 ssl_cert_free(a->cert);
1700         if (a->client_CA != NULL)
1701                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1702         if (a->extra_certs != NULL)
1703                 sk_X509_pop_free(a->extra_certs,X509_free);
1704 #if 0 /* This should never be done, since it removes a global database */
1705         if (a->comp_methods != NULL)
1706                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1707 #else
1708         a->comp_methods = NULL;
1709 #endif
1710
1711 #ifndef OPENSSL_NO_PSK
1712         if (a->psk_identity_hint)
1713                 OPENSSL_free(a->psk_identity_hint);
1714 #endif
1715 #ifndef OPENSSL_NO_ENGINE
1716         if (a->client_cert_engine)
1717                 ENGINE_finish(a->client_cert_engine);
1718 #endif
1719
1720 #ifndef OPENSSL_NO_BUF_FREELISTS
1721         if (a->wbuf_freelist)
1722                 ssl_buf_freelist_free(a->wbuf_freelist);
1723         if (a->rbuf_freelist)
1724                 ssl_buf_freelist_free(a->rbuf_freelist);
1725 #endif
1726
1727         OPENSSL_free(a);
1728         }
1729
1730 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1731         {
1732         ctx->default_passwd_callback=cb;
1733         }
1734
1735 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1736         {
1737         ctx->default_passwd_callback_userdata=u;
1738         }
1739
1740 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1741         {
1742         ctx->app_verify_callback=cb;
1743         ctx->app_verify_arg=arg;
1744         }
1745
1746 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1747         {
1748         ctx->verify_mode=mode;
1749         ctx->default_verify_callback=cb;
1750         }
1751
1752 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1753         {
1754         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1755         }
1756
1757 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1758         {
1759         CERT_PKEY *cpk;
1760         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1761         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1762         int rsa_tmp_export,dh_tmp_export,kl;
1763         unsigned long mask_k,mask_a,emask_k,emask_a;
1764         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1765 #ifndef OPENSSL_NO_ECDH
1766         int have_ecdh_tmp;
1767 #endif
1768         X509 *x = NULL;
1769         EVP_PKEY *ecc_pkey = NULL;
1770         int signature_nid = 0;
1771
1772         if (c == NULL) return;
1773
1774         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1775
1776 #ifndef OPENSSL_NO_RSA
1777         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1778         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1779                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1780 #else
1781         rsa_tmp=rsa_tmp_export=0;
1782 #endif
1783 #ifndef OPENSSL_NO_DH
1784         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1785         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1786                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1787 #else
1788         dh_tmp=dh_tmp_export=0;
1789 #endif
1790
1791 #ifndef OPENSSL_NO_ECDH
1792         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1793 #endif
1794         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1795         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1796         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1797         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1798         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1799         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1800         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1801         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1802         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1803         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1804         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1805 /* FIX THIS EAY EAY EAY */
1806         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1807         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1808         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1809         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1810         mask_k=0;
1811         mask_a=0;
1812         emask_k=0;
1813         emask_a=0;
1814
1815
1816
1817 #ifdef CIPHER_DEBUG
1818         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1819                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1820                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1821 #endif
1822
1823         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1824         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1825                 mask_k |= SSL_kGOST;
1826                 mask_a |= SSL_aGOST01;
1827         }
1828         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1829         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1830                 mask_k |= SSL_kGOST;
1831                 mask_a |= SSL_aGOST94;
1832         }
1833
1834         if (rsa_enc || (rsa_tmp && rsa_sign))
1835                 mask_k|=SSL_kRSA;
1836         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1837                 emask_k|=SSL_kRSA;
1838
1839 #if 0
1840         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1841         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1842                 (rsa_enc || rsa_sign || dsa_sign))
1843                 mask_k|=SSL_kEDH;
1844         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1845                 (rsa_enc || rsa_sign || dsa_sign))
1846                 emask_k|=SSL_kEDH;
1847 #endif
1848
1849         if (dh_tmp_export)
1850                 emask_k|=SSL_kEDH;
1851
1852         if (dh_tmp)
1853                 mask_k|=SSL_kEDH;
1854
1855         if (dh_rsa) mask_k|=SSL_kDHr;
1856         if (dh_rsa_export) emask_k|=SSL_kDHr;
1857
1858         if (dh_dsa) mask_k|=SSL_kDHd;
1859         if (dh_dsa_export) emask_k|=SSL_kDHd;
1860
1861         if (rsa_enc || rsa_sign)
1862                 {
1863                 mask_a|=SSL_aRSA;
1864                 emask_a|=SSL_aRSA;
1865                 }
1866
1867         if (dsa_sign)
1868                 {
1869                 mask_a|=SSL_aDSS;
1870                 emask_a|=SSL_aDSS;
1871                 }
1872
1873         mask_a|=SSL_aNULL;
1874         emask_a|=SSL_aNULL;
1875
1876 #ifndef OPENSSL_NO_KRB5
1877         mask_k|=SSL_kKRB5;
1878         mask_a|=SSL_aKRB5;
1879         emask_k|=SSL_kKRB5;
1880         emask_a|=SSL_aKRB5;
1881 #endif
1882
1883         /* An ECC certificate may be usable for ECDH and/or
1884          * ECDSA cipher suites depending on the key usage extension.
1885          */
1886         if (have_ecc_cert)
1887                 {
1888                 /* This call populates extension flags (ex_flags) */
1889                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1890                 X509_check_purpose(x, -1, 0);
1891                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1892                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1893                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1894                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1895                 ecc_pkey = X509_get_pubkey(x);
1896                 ecc_pkey_size = (ecc_pkey != NULL) ?
1897                     EVP_PKEY_bits(ecc_pkey) : 0;
1898                 EVP_PKEY_free(ecc_pkey);
1899                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1900                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1901 #ifndef OPENSSL_NO_ECDH
1902                 if (ecdh_ok)
1903                         {
1904                         const char *sig = OBJ_nid2ln(signature_nid);
1905                         if (sig == NULL)
1906                                 {
1907                                 ERR_clear_error();
1908                                 sig = "unknown";
1909                                 }
1910
1911                         if (strstr(sig, "WithRSA"))
1912                                 {
1913                                 mask_k|=SSL_kECDHr;
1914                                 mask_a|=SSL_aECDH;
1915                                 if (ecc_pkey_size <= 163)
1916                                         {
1917                                         emask_k|=SSL_kECDHr;
1918                                         emask_a|=SSL_aECDH;
1919                                         }
1920                                 }
1921
1922                         if (signature_nid == NID_ecdsa_with_SHA1)
1923                                 {
1924                                 mask_k|=SSL_kECDHe;
1925                                 mask_a|=SSL_aECDH;
1926                                 if (ecc_pkey_size <= 163)
1927                                         {
1928                                         emask_k|=SSL_kECDHe;
1929                                         emask_a|=SSL_aECDH;
1930                                         }
1931                                 }
1932                         }
1933 #endif
1934 #ifndef OPENSSL_NO_ECDSA
1935                 if (ecdsa_ok)
1936                         {
1937                         mask_a|=SSL_aECDSA;
1938                         emask_a|=SSL_aECDSA;
1939                         }
1940 #endif
1941                 }
1942
1943 #ifndef OPENSSL_NO_ECDH
1944         if (have_ecdh_tmp)
1945                 {
1946                 mask_k|=SSL_kEECDH;
1947                 emask_k|=SSL_kEECDH;
1948                 }
1949 #endif
1950
1951 #ifndef OPENSSL_NO_PSK
1952         mask_k |= SSL_kPSK;
1953         mask_a |= SSL_aPSK;
1954         emask_k |= SSL_kPSK;
1955         emask_a |= SSL_aPSK;
1956 #endif
1957
1958         c->mask_k=mask_k;
1959         c->mask_a=mask_a;
1960         c->export_mask_k=emask_k;
1961         c->export_mask_a=emask_a;
1962         c->valid=1;
1963         }
1964
1965 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1966 #define ku_reject(x, usage) \
1967         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1968
1969 #ifndef OPENSSL_NO_EC
1970
1971 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
1972         {
1973         unsigned long alg_k, alg_a;
1974         EVP_PKEY *pkey = NULL;
1975         int keysize = 0;
1976         int signature_nid = 0;
1977
1978         alg_k = cs->algorithm_mkey;
1979         alg_a = cs->algorithm_auth;
1980
1981         if (SSL_C_IS_EXPORT(cs))
1982                 {
1983                 /* ECDH key length in export ciphers must be <= 163 bits */
1984                 pkey = X509_get_pubkey(x);
1985                 if (pkey == NULL) return 0;
1986                 keysize = EVP_PKEY_bits(pkey);
1987                 EVP_PKEY_free(pkey);
1988                 if (keysize > 163) return 0;
1989                 }
1990
1991         /* This call populates the ex_flags field correctly */
1992         X509_check_purpose(x, -1, 0);
1993         if ((x->sig_alg) && (x->sig_alg->algorithm))
1994                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1995         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
1996                 {
1997                 /* key usage, if present, must allow key agreement */
1998                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1999                         {
2000                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2001                         return 0;
2002                         }
2003                 if (alg_k & SSL_kECDHe)
2004                         {
2005                         /* signature alg must be ECDSA */
2006                         if (signature_nid != NID_ecdsa_with_SHA1)
2007                                 {
2008                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2009                                 return 0;
2010                                 }
2011                         }
2012                 if (alg_k & SSL_kECDHr)
2013                         {
2014                         /* signature alg must be RSA */
2015
2016                         const char *sig = OBJ_nid2ln(signature_nid);
2017                         if (sig == NULL)
2018                                 {
2019                                 ERR_clear_error();
2020                                 sig = "unknown";
2021                                 }
2022                         if (strstr(sig, "WithRSA") == NULL)
2023                                 {
2024                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2025                                 return 0;
2026                                 }
2027                         }
2028                 }
2029         if (alg_a & SSL_aECDSA)
2030                 {
2031                 /* key usage, if present, must allow signing */
2032                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2033                         {
2034                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2035                         return 0;
2036                         }
2037                 }
2038
2039         return 1;  /* all checks are ok */
2040         }
2041
2042 #endif
2043
2044 /* THIS NEEDS CLEANING UP */
2045 X509 *ssl_get_server_send_cert(SSL *s)
2046         {
2047         unsigned long alg_k,alg_a,mask_k,mask_a;
2048         CERT *c;
2049         int i,is_export;
2050
2051         c=s->cert;
2052         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2053         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2054         if (is_export)
2055                 {
2056                 mask_k = c->export_mask_k;
2057                 mask_a = c->export_mask_a;
2058                 }
2059         else
2060                 {
2061                 mask_k = c->mask_k;
2062                 mask_a = c->mask_a;
2063                 }
2064
2065         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2066         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2067
2068         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2069                 {
2070                 /* we don't need to look at SSL_kEECDH
2071                  * since no certificate is needed for
2072                  * anon ECDH and for authenticated
2073                  * EECDH, the check for the auth
2074                  * algorithm will set i correctly
2075                  * NOTE: For ECDH-RSA, we need an ECC
2076                  * not an RSA cert but for EECDH-RSA
2077                  * we need an RSA cert. Placing the
2078                  * checks for SSL_kECDH before RSA
2079                  * checks ensures the correct cert is chosen.
2080                  */
2081                 i=SSL_PKEY_ECC;
2082                 }
2083         else if (alg_a & SSL_aECDSA)
2084                 {
2085                 i=SSL_PKEY_ECC;
2086                 }
2087         else if (alg_k & SSL_kDHr)
2088                 i=SSL_PKEY_DH_RSA;
2089         else if (alg_k & SSL_kDHd)
2090                 i=SSL_PKEY_DH_DSA;
2091         else if (alg_a & SSL_aDSS)
2092                 i=SSL_PKEY_DSA_SIGN;
2093         else if (alg_a & SSL_aRSA)
2094                 {
2095                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2096                         i=SSL_PKEY_RSA_SIGN;
2097                 else
2098                         i=SSL_PKEY_RSA_ENC;
2099                 }
2100         else if (alg_a & SSL_aKRB5)
2101                 {
2102                 /* VRS something else here? */
2103                 return(NULL);
2104                 }
2105         else if (alg_a & SSL_aGOST94)
2106                 i=SSL_PKEY_GOST94;
2107         else if (alg_a & SSL_aGOST01)
2108                 i=SSL_PKEY_GOST01;
2109         else /* if (alg_a & SSL_aNULL) */
2110                 {
2111                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2112                 return(NULL);
2113                 }
2114         if (c->pkeys[i].x509 == NULL) return(NULL);
2115
2116         return(c->pkeys[i].x509);
2117         }
2118
2119 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2120         {
2121         unsigned long alg_a;
2122         CERT *c;
2123
2124         alg_a = cipher->algorithm_auth;
2125         c=s->cert;
2126
2127         if ((alg_a & SSL_aDSS) &&
2128                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2129                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2130         else if (alg_a & SSL_aRSA)
2131                 {
2132                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2133                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2134                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2135                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2136                 else
2137                         return(NULL);
2138                 }
2139         else if ((alg_a & SSL_aECDSA) &&
2140                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2141                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2142         else /* if (alg_a & SSL_aNULL) */
2143                 {
2144                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2145                 return(NULL);
2146                 }
2147         }
2148
2149 void ssl_update_cache(SSL *s,int mode)
2150         {
2151         int i;
2152
2153         /* If the session_id_length is 0, we are not supposed to cache it,
2154          * and it would be rather hard to do anyway :-) */
2155         if (s->session->session_id_length == 0) return;
2156
2157         i=s->session_ctx->session_cache_mode;
2158         if ((i & mode) && (!s->hit)
2159                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2160                     || SSL_CTX_add_session(s->session_ctx,s->session))
2161                 && (s->session_ctx->new_session_cb != NULL))
2162                 {
2163                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2164                 if (!s->session_ctx->new_session_cb(s,s->session))
2165                         SSL_SESSION_free(s->session);
2166                 }
2167
2168         /* auto flush every 255 connections */
2169         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2170                 ((i & mode) == mode))
2171                 {
2172                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2173                         ?s->session_ctx->stats.sess_connect_good
2174                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2175                         {
2176                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2177                         }
2178                 }
2179         }
2180
2181 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2182         {
2183         return(s->method);
2184         }
2185
2186 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2187         {
2188         int conn= -1;
2189         int ret=1;
2190
2191         if (s->method != meth)
2192                 {
2193                 if (s->handshake_func != NULL)
2194                         conn=(s->handshake_func == s->method->ssl_connect);
2195
2196                 if (s->method->version == meth->version)
2197                         s->method=meth;
2198                 else
2199                         {
2200                         s->method->ssl_free(s);
2201                         s->method=meth;
2202                         ret=s->method->ssl_new(s);
2203                         }
2204
2205                 if (conn == 1)
2206                         s->handshake_func=meth->ssl_connect;
2207                 else if (conn == 0)
2208                         s->handshake_func=meth->ssl_accept;
2209                 }
2210         return(ret);
2211         }
2212
2213 int SSL_get_error(const SSL *s,int i)
2214         {
2215         int reason;
2216         unsigned long l;
2217         BIO *bio;
2218
2219         if (i > 0) return(SSL_ERROR_NONE);
2220
2221         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2222          * etc, where we do encode the error */
2223         if ((l=ERR_peek_error()) != 0)
2224                 {
2225                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2226                         return(SSL_ERROR_SYSCALL);
2227                 else
2228                         return(SSL_ERROR_SSL);
2229                 }
2230
2231         if ((i < 0) && SSL_want_read(s))
2232                 {
2233                 bio=SSL_get_rbio(s);
2234                 if (BIO_should_read(bio))
2235                         return(SSL_ERROR_WANT_READ);
2236                 else if (BIO_should_write(bio))
2237                         /* This one doesn't make too much sense ... We never try
2238                          * to write to the rbio, and an application program where
2239                          * rbio and wbio are separate couldn't even know what it
2240                          * should wait for.
2241                          * However if we ever set s->rwstate incorrectly
2242                          * (so that we have SSL_want_read(s) instead of
2243                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2244                          * this test works around that bug; so it might be safer
2245                          * to keep it. */
2246                         return(SSL_ERROR_WANT_WRITE);
2247                 else if (BIO_should_io_special(bio))
2248                         {
2249                         reason=BIO_get_retry_reason(bio);
2250                         if (reason == BIO_RR_CONNECT)
2251                                 return(SSL_ERROR_WANT_CONNECT);
2252                         else if (reason == BIO_RR_ACCEPT)
2253                                 return(SSL_ERROR_WANT_ACCEPT);
2254                         else
2255                                 return(SSL_ERROR_SYSCALL); /* unknown */
2256                         }
2257                 }
2258
2259         if ((i < 0) && SSL_want_write(s))
2260                 {
2261                 bio=SSL_get_wbio(s);
2262                 if (BIO_should_write(bio))
2263                         return(SSL_ERROR_WANT_WRITE);
2264                 else if (BIO_should_read(bio))
2265                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2266                         return(SSL_ERROR_WANT_READ);
2267                 else if (BIO_should_io_special(bio))
2268                         {
2269                         reason=BIO_get_retry_reason(bio);
2270                         if (reason == BIO_RR_CONNECT)
2271                                 return(SSL_ERROR_WANT_CONNECT);
2272                         else if (reason == BIO_RR_ACCEPT)
2273                                 return(SSL_ERROR_WANT_ACCEPT);
2274                         else
2275                                 return(SSL_ERROR_SYSCALL);
2276                         }
2277                 }
2278         if ((i < 0) && SSL_want_x509_lookup(s))
2279                 {
2280                 return(SSL_ERROR_WANT_X509_LOOKUP);
2281                 }
2282
2283         if (i == 0)
2284                 {
2285                 if (s->version == SSL2_VERSION)
2286                         {
2287                         /* assume it is the socket being closed */
2288                         return(SSL_ERROR_ZERO_RETURN);
2289                         }
2290                 else
2291                         {
2292                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2293                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2294                                 return(SSL_ERROR_ZERO_RETURN);
2295                         }
2296                 }
2297         return(SSL_ERROR_SYSCALL);
2298         }
2299
2300 int SSL_do_handshake(SSL *s)
2301         {
2302         int ret=1;
2303
2304         if (s->handshake_func == NULL)
2305                 {
2306                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2307                 return(-1);
2308                 }
2309
2310         s->method->ssl_renegotiate_check(s);
2311
2312         if (SSL_in_init(s) || SSL_in_before(s))
2313                 {
2314                 ret=s->handshake_func(s);
2315                 }
2316         return(ret);
2317         }
2318
2319 /* For the next 2 functions, SSL_clear() sets shutdown and so
2320  * one of these calls will reset it */
2321 void SSL_set_accept_state(SSL *s)
2322         {
2323         s->server=1;
2324         s->shutdown=0;
2325         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2326         s->handshake_func=s->method->ssl_accept;
2327         /* clear the current cipher */
2328         ssl_clear_cipher_ctx(s);
2329         ssl_clear_hash_ctx(&s->read_hash);
2330         ssl_clear_hash_ctx(&s->write_hash);
2331         }
2332
2333 void SSL_set_connect_state(SSL *s)
2334         {
2335         s->server=0;
2336         s->shutdown=0;
2337         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2338         s->handshake_func=s->method->ssl_connect;
2339         /* clear the current cipher */
2340         ssl_clear_cipher_ctx(s);
2341         ssl_clear_hash_ctx(&s->read_hash);
2342         ssl_clear_hash_ctx(&s->write_hash);
2343         }
2344
2345 int ssl_undefined_function(SSL *s)
2346         {
2347         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2348         return(0);
2349         }
2350
2351 int ssl_undefined_void_function(void)
2352         {
2353         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2354         return(0);
2355         }
2356
2357 int ssl_undefined_const_function(const SSL *s)
2358         {
2359         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2360         return(0);
2361         }
2362
2363 SSL_METHOD *ssl_bad_method(int ver)
2364         {
2365         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2366         return(NULL);
2367         }
2368
2369 const char *SSL_get_version(const SSL *s)
2370         {
2371         if (s->version == TLS1_VERSION)
2372                 return("TLSv1");
2373         else if (s->version == SSL3_VERSION)
2374                 return("SSLv3");
2375         else if (s->version == SSL2_VERSION)
2376                 return("SSLv2");
2377         else
2378                 return("unknown");
2379         }
2380
2381 SSL *SSL_dup(SSL *s)
2382         {
2383         STACK_OF(X509_NAME) *sk;
2384         X509_NAME *xn;
2385         SSL *ret;
2386         int i;
2387
2388         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2389             return(NULL);
2390
2391         ret->version = s->version;
2392         ret->type = s->type;
2393         ret->method = s->method;
2394
2395         if (s->session != NULL)
2396                 {
2397                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2398                 SSL_copy_session_id(ret,s);
2399                 }
2400         else
2401                 {
2402                 /* No session has been established yet, so we have to expect
2403                  * that s->cert or ret->cert will be changed later --
2404                  * they should not both point to the same object,
2405                  * and thus we can't use SSL_copy_session_id. */
2406
2407                 ret->method->ssl_free(ret);
2408                 ret->method = s->method;
2409                 ret->method->ssl_new(ret);
2410
2411                 if (s->cert != NULL)
2412                         {
2413                         if (ret->cert != NULL)
2414                                 {
2415                                 ssl_cert_free(ret->cert);
2416                                 }
2417                         ret->cert = ssl_cert_dup(s->cert);
2418                         if (ret->cert == NULL)
2419                                 goto err;
2420                         }
2421
2422                 SSL_set_session_id_context(ret,
2423                         s->sid_ctx, s->sid_ctx_length);
2424                 }
2425
2426         ret->options=s->options;
2427         ret->mode=s->mode;
2428         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2429         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2430         ret->msg_callback = s->msg_callback;
2431         ret->msg_callback_arg = s->msg_callback_arg;
2432         SSL_set_verify(ret,SSL_get_verify_mode(s),
2433                 SSL_get_verify_callback(s));
2434         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2435         ret->generate_session_id = s->generate_session_id;
2436
2437         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2438
2439         ret->debug=s->debug;
2440
2441         /* copy app data, a little dangerous perhaps */
2442         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2443                 goto err;
2444
2445         /* setup rbio, and wbio */
2446         if (s->rbio != NULL)
2447                 {
2448                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2449                         goto err;
2450                 }
2451         if (s->wbio != NULL)
2452                 {
2453                 if (s->wbio != s->rbio)
2454                         {
2455                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2456                                 goto err;
2457                         }
2458                 else
2459                         ret->wbio=ret->rbio;
2460                 }
2461         ret->rwstate = s->rwstate;
2462         ret->in_handshake = s->in_handshake;
2463         ret->handshake_func = s->handshake_func;
2464         ret->server = s->server;
2465         ret->new_session = s->new_session;
2466         ret->quiet_shutdown = s->quiet_shutdown;
2467         ret->shutdown=s->shutdown;
2468         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2469         ret->rstate=s->rstate;
2470         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2471         ret->hit=s->hit;
2472
2473         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2474
2475         /* dup the cipher_list and cipher_list_by_id stacks */
2476         if (s->cipher_list != NULL)
2477                 {
2478                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2479                         goto err;
2480                 }
2481         if (s->cipher_list_by_id != NULL)
2482                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2483                         == NULL)
2484                         goto err;
2485
2486         /* Dup the client_CA list */
2487         if (s->client_CA != NULL)
2488                 {
2489                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2490                 ret->client_CA=sk;
2491                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2492                         {
2493                         xn=sk_X509_NAME_value(sk,i);
2494                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2495                                 {
2496                                 X509_NAME_free(xn);
2497                                 goto err;
2498                                 }
2499                         }
2500                 }
2501
2502         if (0)
2503                 {
2504 err:
2505                 if (ret != NULL) SSL_free(ret);
2506                 ret=NULL;
2507                 }
2508         return(ret);
2509         }
2510
2511 void ssl_clear_cipher_ctx(SSL *s)
2512         {
2513         if (s->enc_read_ctx != NULL)
2514                 {
2515                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2516                 OPENSSL_free(s->enc_read_ctx);
2517                 s->enc_read_ctx=NULL;
2518                 }
2519         if (s->enc_write_ctx != NULL)
2520                 {
2521                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2522                 OPENSSL_free(s->enc_write_ctx);
2523                 s->enc_write_ctx=NULL;
2524                 }
2525 #ifndef OPENSSL_NO_COMP
2526         if (s->expand != NULL)
2527                 {
2528                 COMP_CTX_free(s->expand);
2529                 s->expand=NULL;
2530                 }
2531         if (s->compress != NULL)
2532                 {
2533                 COMP_CTX_free(s->compress);
2534                 s->compress=NULL;
2535                 }
2536 #endif
2537         }
2538
2539 /* Fix this function so that it takes an optional type parameter */
2540 X509 *SSL_get_certificate(const SSL *s)
2541         {
2542         if (s->cert != NULL)
2543                 return(s->cert->key->x509);
2544         else
2545                 return(NULL);
2546         }
2547
2548 /* Fix this function so that it takes an optional type parameter */
2549 EVP_PKEY *SSL_get_privatekey(SSL *s)
2550         {
2551         if (s->cert != NULL)
2552                 return(s->cert->key->privatekey);
2553         else
2554                 return(NULL);
2555         }
2556
2557 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2558         {
2559         if ((s->session != NULL) && (s->session->cipher != NULL))
2560                 return(s->session->cipher);
2561         return(NULL);
2562         }
2563 #ifdef OPENSSL_NO_COMP
2564 const void *SSL_get_current_compression(SSL *s)
2565         {
2566         return NULL;
2567         }
2568 const void *SSL_get_current_expansion(SSL *s)
2569         {
2570         return NULL;
2571         }
2572 #else
2573
2574 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2575         {
2576         if (s->compress != NULL)
2577                 return(s->compress->meth);
2578         return(NULL);
2579         }
2580
2581 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2582         {
2583         if (s->expand != NULL)
2584                 return(s->expand->meth);
2585         return(NULL);
2586         }
2587 #endif
2588
2589 int ssl_init_wbio_buffer(SSL *s,int push)
2590         {
2591         BIO *bbio;
2592
2593         if (s->bbio == NULL)
2594                 {
2595                 bbio=BIO_new(BIO_f_buffer());
2596                 if (bbio == NULL) return(0);
2597                 s->bbio=bbio;
2598                 }
2599         else
2600                 {
2601                 bbio=s->bbio;
2602                 if (s->bbio == s->wbio)
2603                         s->wbio=BIO_pop(s->wbio);
2604                 }
2605         (void)BIO_reset(bbio);
2606 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2607         if (!BIO_set_read_buffer_size(bbio,1))
2608                 {
2609                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2610                 return(0);
2611                 }
2612         if (push)
2613                 {
2614                 if (s->wbio != bbio)
2615                         s->wbio=BIO_push(bbio,s->wbio);
2616                 }
2617         else
2618                 {
2619                 if (s->wbio == bbio)
2620                         s->wbio=BIO_pop(bbio);
2621                 }
2622         return(1);
2623         }
2624
2625 void ssl_free_wbio_buffer(SSL *s)
2626         {
2627         if (s->bbio == NULL) return;
2628
2629         if (s->bbio == s->wbio)
2630                 {
2631                 /* remove buffering */
2632                 s->wbio=BIO_pop(s->wbio);
2633 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2634                 assert(s->wbio != NULL);
2635 #endif
2636         }
2637         BIO_free(s->bbio);
2638         s->bbio=NULL;
2639         }
2640
2641 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2642         {
2643         ctx->quiet_shutdown=mode;
2644         }
2645
2646 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2647         {
2648         return(ctx->quiet_shutdown);
2649         }
2650
2651 void SSL_set_quiet_shutdown(SSL *s,int mode)
2652         {
2653         s->quiet_shutdown=mode;
2654         }
2655
2656 int SSL_get_quiet_shutdown(const SSL *s)
2657         {
2658         return(s->quiet_shutdown);
2659         }
2660
2661 void SSL_set_shutdown(SSL *s,int mode)
2662         {
2663         s->shutdown=mode;
2664         }
2665
2666 int SSL_get_shutdown(const SSL *s)
2667         {
2668         return(s->shutdown);
2669         }
2670
2671 int SSL_version(const SSL *s)
2672         {
2673         return(s->version);
2674         }
2675
2676 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2677         {
2678         return(ssl->ctx);
2679         }
2680
2681 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2682         {
2683         if (ssl->ctx == ctx)
2684                 return ssl->ctx;
2685 #ifndef OPENSSL_NO_TLSEXT
2686         if (ctx == NULL)
2687                 ctx = ssl->initial_ctx;
2688 #endif
2689         if (ssl->cert != NULL)
2690                 ssl_cert_free(ssl->cert);
2691         ssl->cert = ssl_cert_dup(ctx->cert);
2692         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2693         if (ssl->ctx != NULL)
2694                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2695         ssl->ctx = ctx;
2696         return(ssl->ctx);
2697         }
2698
2699 #ifndef OPENSSL_NO_STDIO
2700 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2701         {
2702         return(X509_STORE_set_default_paths(ctx->cert_store));
2703         }
2704
2705 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2706                 const char *CApath)
2707         {
2708         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2709         }
2710 #endif
2711
2712 void SSL_set_info_callback(SSL *ssl,
2713         void (*cb)(const SSL *ssl,int type,int val))
2714         {
2715         ssl->info_callback=cb;
2716         }
2717
2718 /* One compiler (Diab DCC) doesn't like argument names in returned
2719    function pointer.  */
2720 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2721         {
2722         return ssl->info_callback;
2723         }
2724
2725 int SSL_state(const SSL *ssl)
2726         {
2727         return(ssl->state);
2728         }
2729
2730 void SSL_set_verify_result(SSL *ssl,long arg)
2731         {
2732         ssl->verify_result=arg;
2733         }
2734
2735 long SSL_get_verify_result(const SSL *ssl)
2736         {
2737         return(ssl->verify_result);
2738         }
2739
2740 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2741                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2742         {
2743         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2744                                 new_func, dup_func, free_func);
2745         }
2746
2747 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2748         {
2749         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2750         }
2751
2752 void *SSL_get_ex_data(const SSL *s,int idx)
2753         {
2754         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2755         }
2756
2757 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2758                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2759         {
2760         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2761                                 new_func, dup_func, free_func);
2762         }
2763
2764 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2765         {
2766         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2767         }
2768
2769 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2770         {
2771         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2772         }
2773
2774 int ssl_ok(SSL *s)
2775         {
2776         return(1);
2777         }
2778
2779 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2780         {
2781         return(ctx->cert_store);
2782         }
2783
2784 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2785         {
2786         if (ctx->cert_store != NULL)
2787                 X509_STORE_free(ctx->cert_store);
2788         ctx->cert_store=store;
2789         }
2790
2791 int SSL_want(const SSL *s)
2792         {
2793         return(s->rwstate);
2794         }
2795
2796 /*!
2797  * \brief Set the callback for generating temporary RSA keys.
2798  * \param ctx the SSL context.
2799  * \param cb the callback
2800  */
2801
2802 #ifndef OPENSSL_NO_RSA
2803 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2804                                                           int is_export,
2805                                                           int keylength))
2806     {
2807     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2808     }
2809
2810 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2811                                                   int is_export,
2812                                                   int keylength))
2813     {
2814     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2815     }
2816 #endif
2817
2818 #ifdef DOXYGEN
2819 /*!
2820  * \brief The RSA temporary key callback function.
2821  * \param ssl the SSL session.
2822  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2823  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2824  * of the required key in bits.
2825  * \return the temporary RSA key.
2826  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2827  */
2828
2829 RSA *cb(SSL *ssl,int is_export,int keylength)
2830     {}
2831 #endif
2832
2833 /*!
2834  * \brief Set the callback for generating temporary DH keys.
2835  * \param ctx the SSL context.
2836  * \param dh the callback
2837  */
2838
2839 #ifndef OPENSSL_NO_DH
2840 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2841                                                         int keylength))
2842         {
2843         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2844         }
2845
2846 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2847                                                 int keylength))
2848         {
2849         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2850         }
2851 #endif
2852
2853 #ifndef OPENSSL_NO_ECDH
2854 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2855                                                                 int keylength))
2856         {
2857         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2858         }
2859
2860 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2861                                                         int keylength))
2862         {
2863         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2864         }
2865 #endif
2866
2867 #ifndef OPENSSL_NO_PSK
2868 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2869         {
2870         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2871                 {
2872                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2873                 return 0;
2874                 }
2875         if (ctx->psk_identity_hint != NULL)
2876                 OPENSSL_free(ctx->psk_identity_hint);
2877         if (identity_hint != NULL)
2878                 {
2879                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2880                 if (ctx->psk_identity_hint == NULL)
2881                         return 0;
2882                 }
2883         else
2884                 ctx->psk_identity_hint = NULL;
2885         return 1;
2886         }
2887
2888 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2889         {
2890         if (s == NULL)
2891                 return 0;
2892
2893         if (s->session == NULL)
2894                 return 1; /* session not created yet, ignored */
2895
2896         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2897                 {
2898                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2899                 return 0;
2900                 }
2901         if (s->session->psk_identity_hint != NULL)
2902                 OPENSSL_free(s->session->psk_identity_hint);
2903         if (identity_hint != NULL)
2904                 {
2905                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2906                 if (s->session->psk_identity_hint == NULL)
2907                         return 0;
2908                 }
2909         else
2910                 s->session->psk_identity_hint = NULL;
2911         return 1;
2912         }
2913
2914 const char *SSL_get_psk_identity_hint(const SSL *s)
2915         {
2916         if (s == NULL || s->session == NULL)
2917                 return NULL;
2918         return(s->session->psk_identity_hint);
2919         }
2920
2921 const char *SSL_get_psk_identity(const SSL *s)
2922         {
2923         if (s == NULL || s->session == NULL)
2924                 return NULL;
2925         return(s->session->psk_identity);
2926         }
2927
2928 void SSL_set_psk_client_callback(SSL *s,
2929     unsigned int (*cb)(SSL *ssl, const char *hint,
2930                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2931                        unsigned int max_psk_len))
2932         {
2933         s->psk_client_callback = cb;
2934         }
2935
2936 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2937     unsigned int (*cb)(SSL *ssl, const char *hint,
2938                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2939                        unsigned int max_psk_len))
2940         {
2941         ctx->psk_client_callback = cb;
2942         }
2943
2944 void SSL_set_psk_server_callback(SSL *s,
2945     unsigned int (*cb)(SSL *ssl, const char *identity,
2946                        unsigned char *psk, unsigned int max_psk_len))
2947         {
2948         s->psk_server_callback = cb;
2949         }
2950
2951 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2952     unsigned int (*cb)(SSL *ssl, const char *identity,
2953                        unsigned char *psk, unsigned int max_psk_len))
2954         {
2955         ctx->psk_server_callback = cb;
2956         }
2957 #endif
2958
2959 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))
2960         {
2961         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2962         }
2963 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))
2964         {
2965         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2966         }
2967
2968 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2969  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2970  * any. If EVP_MD pointer is passed, initializes ctx with this md
2971  * Returns newly allocated ctx;
2972  */
2973
2974 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
2975 {
2976         ssl_clear_hash_ctx(hash);
2977         *hash = EVP_MD_CTX_create();
2978         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2979         return *hash;
2980 }
2981 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
2982 {
2983
2984         if (*hash) EVP_MD_CTX_destroy(*hash);
2985         *hash=NULL;
2986 }
2987
2988 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2989 #include "../crypto/bio/bss_file.c"
2990 #endif
2991
2992 IMPLEMENT_STACK_OF(SSL_CIPHER)
2993 IMPLEMENT_STACK_OF(SSL_COMP)
2994 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
2995                                     ssl_cipher_id);
2996