ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function,
 180         (int (*)(SSL *, unsigned char *, size_t, const char *,
 181                  size_t, const unsigned char *, size_t,
 182                  int use_context)) ssl_undefined_function,
 183         };
 184
 185 int SSL_clear(SSL *s)
 186         {
 187
 188         if (s->method == NULL)
 189                 {
 190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 191                 return(0);
 192                 }
 193
 194         if (ssl_clear_bad_session(s))
 195                 {
 196                 SSL_SESSION_free(s->session);
 197                 s->session=NULL;
 198                 }
 199
 200         s->error=0;
 201         s->hit=0;
 202         s->shutdown=0;
 203
 204 #if 0
 205     /*
 206      * Disabled since version 1.10 of this file (early return not
 207      * needed because SSL_clear is not called when doing renegotiation)
 208      */
 209     /*
 210      * This is set if we are doing dynamic renegotiation so keep
 211      * the old cipher.  It is sort of a SSL_clear_lite :-)
 212      */
 213         if (s->renegotiate) return(1);
 214 #else
 215         if (s->renegotiate)
 216                 {
 217                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 218                 return 0;
 219                 }
 220 #endif
 221
 222         s->type=0;
 223
 224         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 225
 226         s->version=s->method->version;
 227         s->client_version=s->version;
 228         s->rwstate=SSL_NOTHING;
 229         s->rstate=SSL_ST_READ_HEADER;
 230 #if 0
 231         s->read_ahead=s->ctx->read_ahead;
 232 #endif
 233
 234         if (s->init_buf != NULL)
 235                 {
 236                 BUF_MEM_free(s->init_buf);
 237                 s->init_buf=NULL;
 238                 }
 239
 240         ssl_clear_cipher_ctx(s);
 241         ssl_clear_hash_ctx(&s->read_hash);
 242         ssl_clear_hash_ctx(&s->write_hash);
 243
 244         s->first_packet=0;
 245
 246 #if 1
 247         /* Check to see if we were changed into a different method, if
 248          * so, revert back if we are not doing session-id reuse. */
 249         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 250                 {
 251                 s->method->ssl_free(s);
 252                 s->method=s->ctx->method;
 253                 if (!s->method->ssl_new(s))
 254                         return(0);
 255                 }
 256         else
 257 #endif
 258                 s->method->ssl_clear(s);
 259         return(1);
 260         }
 261
 262 /** Used to change an SSL_CTXs default SSL method type */
 263 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 264         {
 265         STACK_OF(SSL_CIPHER) *sk;
 266
 267         ctx->method=meth;
 268
 269         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 270                 &(ctx->cipher_list_by_id),
 271                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 272         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 273                 {
 274                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 275                 return(0);
 276                 }
 277         return(1);
 278         }
 279
 280 SSL *SSL_new(SSL_CTX *ctx)
 281         {
 282         SSL *s;
 283
 284         if (ctx == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 287                 return(NULL);
 288                 }
 289         if (ctx->method == NULL)
 290                 {
 291                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 292                 return(NULL);
 293                 }
 294
 295         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 296         if (s == NULL) goto err;
 297         memset(s,0,sizeof(SSL));
 298
 299 #ifndef OPENSSL_NO_KRB5
 300         s->kssl_ctx = kssl_ctx_new();
 301 #endif  /* OPENSSL_NO_KRB5 */
 302
 303         s->options=ctx->options;
 304         s->mode=ctx->mode;
 305         s->max_cert_list=ctx->max_cert_list;
 306
 307         if (ctx->cert != NULL)
 308                 {
 309                 /* Earlier library versions used to copy the pointer to
 310                  * the CERT, not its contents; only when setting new
 311                  * parameters for the per-SSL copy, ssl_cert_new would be
 312                  * called (and the direct reference to the per-SSL_CTX
 313                  * settings would be lost, but those still were indirectly
 314                  * accessed for various purposes, and for that reason they
 315                  * used to be known as s->ctx->default_cert).
 316                  * Now we don't look at the SSL_CTX's CERT after having
 317                  * duplicated it once. */
 318
 319                 s->cert = ssl_cert_dup(ctx->cert);
 320                 if (s->cert == NULL)
 321                         goto err;
 322                 }
 323         else
 324                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 325
 326         s->read_ahead=ctx->read_ahead;
 327         s->msg_callback=ctx->msg_callback;
 328         s->msg_callback_arg=ctx->msg_callback_arg;
 329         s->verify_mode=ctx->verify_mode;
 330 #if 0
 331         s->verify_depth=ctx->verify_depth;
 332 #endif
 333         s->sid_ctx_length=ctx->sid_ctx_length;
 334         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 335         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 336         s->verify_callback=ctx->default_verify_callback;
 337         s->generate_session_id=ctx->generate_session_id;
 338
 339         s->param = X509_VERIFY_PARAM_new();
 340         if (!s->param)
 341                 goto err;
 342         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 343 #if 0
 344         s->purpose = ctx->purpose;
 345         s->trust = ctx->trust;
 346 #endif
 347         s->quiet_shutdown=ctx->quiet_shutdown;
 348         s->max_send_fragment = ctx->max_send_fragment;
 349
 350         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 351         s->ctx=ctx;
 352 #ifndef OPENSSL_NO_TLSEXT
 353         s->tlsext_debug_cb = 0;
 354         s->tlsext_debug_arg = NULL;
 355         s->tlsext_ticket_expected = 0;
 356         s->tlsext_status_type = -1;
 357         s->tlsext_status_expected = 0;
 358         s->tlsext_ocsp_ids = NULL;
 359         s->tlsext_ocsp_exts = NULL;
 360         s->tlsext_ocsp_resp = NULL;
 361         s->tlsext_ocsp_resplen = -1;
 362         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 363         s->initial_ctx=ctx;
 364 # ifndef OPENSSL_NO_NEXTPROTONEG
 365         s->next_proto_negotiated = NULL;
 366 # endif
 367 #endif
 368
 369         s->verify_result=X509_V_OK;
 370
 371         s->method=ctx->method;
 372
 373         if (!s->method->ssl_new(s))
 374                 goto err;
 375
 376         s->references=1;
 377         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 378
 379         SSL_clear(s);
 380
 381         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 382
 383 #ifndef OPENSSL_NO_PSK
 384         s->psk_client_callback=ctx->psk_client_callback;
 385         s->psk_server_callback=ctx->psk_server_callback;
 386 #endif
 387
 388         return(s);
 389 err:
 390         if (s != NULL)
 391                 SSL_free(s);
 392         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 393         return(NULL);
 394         }
 395
 396 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 397                                    unsigned int sid_ctx_len)
 398     {
 399     if(sid_ctx_len > sizeof ctx->sid_ctx)
 400         {
 401         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 402         return 0;
 403         }
 404     ctx->sid_ctx_length=sid_ctx_len;
 405     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 406
 407     return 1;
 408     }
 409
 410 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 411                                unsigned int sid_ctx_len)
 412     {
 413     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 414         {
 415         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 416         return 0;
 417         }
 418     ssl->sid_ctx_length=sid_ctx_len;
 419     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 420
 421     return 1;
 422     }
 423
 424 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 425         {
 426         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 427         ctx->generate_session_id = cb;
 428         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 429         return 1;
 430         }
 431
 432 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 433         {
 434         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 435         ssl->generate_session_id = cb;
 436         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 437         return 1;
 438         }
 439
 440 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 441                                 unsigned int id_len)
 442         {
 443         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 444          * we can "construct" a session to give us the desired check - ie. to
 445          * find if there's a session in the hash table that would conflict with
 446          * any new session built out of this id/id_len and the ssl_version in
 447          * use by this SSL. */
 448         SSL_SESSION r, *p;
 449
 450         if(id_len > sizeof r.session_id)
 451                 return 0;
 452
 453         r.ssl_version = ssl->version;
 454         r.session_id_length = id_len;
 455         memcpy(r.session_id, id, id_len);
 456         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 457          * callback is calling us to check the uniqueness of a shorter ID, it
 458          * must be compared as a padded-out ID because that is what it will be
 459          * converted to when the callback has finished choosing it. */
 460         if((r.ssl_version == SSL2_VERSION) &&
 461                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 462                 {
 463                 memset(r.session_id + id_len, 0,
 464                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 465                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 466                 }
 467
 468         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 469         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 470         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 471         return (p != NULL);
 472         }
 473
 474 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 475         {
 476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 477         }
 478
 479 int SSL_set_purpose(SSL *s, int purpose)
 480         {
 481         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 482         }
 483
 484 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 485         {
 486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 487         }
 488
 489 int SSL_set_trust(SSL *s, int trust)
 490         {
 491         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 492         }
 493
 494 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 495         {
 496         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 497         }
 498
 499 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 500         {
 501         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 502         }
 503
 504 void SSL_free(SSL *s)
 505         {
 506         int i;
 507
 508         if(s == NULL)
 509             return;
 510
 511         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 512 #ifdef REF_PRINT
 513         REF_PRINT("SSL",s);
 514 #endif
 515         if (i > 0) return;
 516 #ifdef REF_CHECK
 517         if (i < 0)
 518                 {
 519                 fprintf(stderr,"SSL_free, bad reference count\n");
 520                 abort(); /* ok */
 521                 }
 522 #endif
 523
 524         if (s->param)
 525                 X509_VERIFY_PARAM_free(s->param);
 526
 527         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 528
 529         if (s->bbio != NULL)
 530                 {
 531                 /* If the buffering BIO is in place, pop it off */
 532                 if (s->bbio == s->wbio)
 533                         {
 534                         s->wbio=BIO_pop(s->wbio);
 535                         }
 536                 BIO_free(s->bbio);
 537                 s->bbio=NULL;
 538                 }
 539         if (s->rbio != NULL)
 540                 BIO_free_all(s->rbio);
 541         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 542                 BIO_free_all(s->wbio);
 543
 544         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 545
 546         /* add extra stuff */
 547         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 548         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 549
 550         /* Make the next call work :-) */
 551         if (s->session != NULL)
 552                 {
 553                 ssl_clear_bad_session(s);
 554                 SSL_SESSION_free(s->session);
 555                 }
 556
 557         ssl_clear_cipher_ctx(s);
 558         ssl_clear_hash_ctx(&s->read_hash);
 559         ssl_clear_hash_ctx(&s->write_hash);
 560
 561         if (s->cert != NULL) ssl_cert_free(s->cert);
 562         /* Free up if allocated */
 563
 564 #ifndef OPENSSL_NO_TLSEXT
 565         if (s->tlsext_hostname)
 566                 OPENSSL_free(s->tlsext_hostname);
 567         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 568 #ifndef OPENSSL_NO_EC
 569         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 570         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 571 #endif /* OPENSSL_NO_EC */
 572         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 573         if (s->tlsext_ocsp_exts)
 574                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 575                                                 X509_EXTENSION_free);
 576         if (s->tlsext_ocsp_ids)
 577                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 578         if (s->tlsext_ocsp_resp)
 579                 OPENSSL_free(s->tlsext_ocsp_resp);
 580 #endif
 581
 582         if (s->client_CA != NULL)
 583                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 584
 585         if (s->method != NULL) s->method->ssl_free(s);
 586
 587         if (s->ctx) SSL_CTX_free(s->ctx);
 588
 589 #ifndef OPENSSL_NO_KRB5
 590         if (s->kssl_ctx != NULL)
 591                 kssl_ctx_free(s->kssl_ctx);
 592 #endif  /* OPENSSL_NO_KRB5 */
 593
 594 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 595         if (s->next_proto_negotiated)
 596                 OPENSSL_free(s->next_proto_negotiated);
 597 #endif
 598
 599 #ifndef OPENSSL_NO_SRTP
 600         if (s->srtp_profiles)
 601             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 602 #endif
 603
 604         OPENSSL_free(s);
 605         }
 606
 607 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 608         {
 609         /* If the output buffering BIO is still in place, remove it
 610          */
 611         if (s->bbio != NULL)
 612                 {
 613                 if (s->wbio == s->bbio)
 614                         {
 615                         s->wbio=s->wbio->next_bio;
 616                         s->bbio->next_bio=NULL;
 617                         }
 618                 }
 619         if ((s->rbio != NULL) && (s->rbio != rbio))
 620                 BIO_free_all(s->rbio);
 621         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 622                 BIO_free_all(s->wbio);
 623         s->rbio=rbio;
 624         s->wbio=wbio;
 625         }
 626
 627 BIO *SSL_get_rbio(const SSL *s)
 628         { return(s->rbio); }
 629
 630 BIO *SSL_get_wbio(const SSL *s)
 631         { return(s->wbio); }
 632
 633 int SSL_get_fd(const SSL *s)
 634         {
 635         return(SSL_get_rfd(s));
 636         }
 637
 638 int SSL_get_rfd(const SSL *s)
 639         {
 640         int ret= -1;
 641         BIO *b,*r;
 642
 643         b=SSL_get_rbio(s);
 644         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 645         if (r != NULL)
 646                 BIO_get_fd(r,&ret);
 647         return(ret);
 648         }
 649
 650 int SSL_get_wfd(const SSL *s)
 651         {
 652         int ret= -1;
 653         BIO *b,*r;
 654
 655         b=SSL_get_wbio(s);
 656         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 657         if (r != NULL)
 658                 BIO_get_fd(r,&ret);
 659         return(ret);
 660         }
 661
 662 #ifndef OPENSSL_NO_SOCK
 663 int SSL_set_fd(SSL *s,int fd)
 664         {
 665         int ret=0;
 666         BIO *bio=NULL;
 667
 668         bio=BIO_new(BIO_s_socket());
 669
 670         if (bio == NULL)
 671                 {
 672                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 673                 goto err;
 674                 }
 675         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 676         SSL_set_bio(s,bio,bio);
 677         ret=1;
 678 err:
 679         return(ret);
 680         }
 681
 682 int SSL_set_wfd(SSL *s,int fd)
 683         {
 684         int ret=0;
 685         BIO *bio=NULL;
 686
 687         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 688                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 689                 {
 690                 bio=BIO_new(BIO_s_socket());
 691
 692                 if (bio == NULL)
 693                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 694                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 695                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 696                 }
 697         else
 698                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 699         ret=1;
 700 err:
 701         return(ret);
 702         }
 703
 704 int SSL_set_rfd(SSL *s,int fd)
 705         {
 706         int ret=0;
 707         BIO *bio=NULL;
 708
 709         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 710                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 711                 {
 712                 bio=BIO_new(BIO_s_socket());
 713
 714                 if (bio == NULL)
 715                         {
 716                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 717                         goto err;
 718                         }
 719                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 720                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 721                 }
 722         else
 723                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 724         ret=1;
 725 err:
 726         return(ret);
 727         }
 728 #endif
 729
 730
 731 /* return length of latest Finished message we sent, copy to 'buf' */
 732 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 733         {
 734         size_t ret = 0;
 735
 736         if (s->s3 != NULL)
 737                 {
 738                 ret = s->s3->tmp.finish_md_len;
 739                 if (count > ret)
 740                         count = ret;
 741                 memcpy(buf, s->s3->tmp.finish_md, count);
 742                 }
 743         return ret;
 744         }
 745
 746 /* return length of latest Finished message we expected, copy to 'buf' */
 747 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 748         {
 749         size_t ret = 0;
 750
 751         if (s->s3 != NULL)
 752                 {
 753                 ret = s->s3->tmp.peer_finish_md_len;
 754                 if (count > ret)
 755                         count = ret;
 756                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 757                 }
 758         return ret;
 759         }
 760
 761
 762 int SSL_get_verify_mode(const SSL *s)
 763         {
 764         return(s->verify_mode);
 765         }
 766
 767 int SSL_get_verify_depth(const SSL *s)
 768         {
 769         return X509_VERIFY_PARAM_get_depth(s->param);
 770         }
 771
 772 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 773         {
 774         return(s->verify_callback);
 775         }
 776
 777 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 778         {
 779         return(ctx->verify_mode);
 780         }
 781
 782 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 783         {
 784         return X509_VERIFY_PARAM_get_depth(ctx->param);
 785         }
 786
 787 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 788         {
 789         return(ctx->default_verify_callback);
 790         }
 791
 792 void SSL_set_verify(SSL *s,int mode,
 793                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 794         {
 795         s->verify_mode=mode;
 796         if (callback != NULL)
 797                 s->verify_callback=callback;
 798         }
 799
 800 void SSL_set_verify_depth(SSL *s,int depth)
 801         {
 802         X509_VERIFY_PARAM_set_depth(s->param, depth);
 803         }
 804
 805 void SSL_set_read_ahead(SSL *s,int yes)
 806         {
 807         s->read_ahead=yes;
 808         }
 809
 810 int SSL_get_read_ahead(const SSL *s)
 811         {
 812         return(s->read_ahead);
 813         }
 814
 815 int SSL_pending(const SSL *s)
 816         {
 817         /* SSL_pending cannot work properly if read-ahead is enabled
 818          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 819          * and it is impossible to fix since SSL_pending cannot report
 820          * errors that may be observed while scanning the new data.
 821          * (Note that SSL_pending() is often used as a boolean value,
 822          * so we'd better not return -1.)
 823          */
 824         return(s->method->ssl_pending(s));
 825         }
 826
 827 X509 *SSL_get_peer_certificate(const SSL *s)
 828         {
 829         X509 *r;
 830
 831         if ((s == NULL) || (s->session == NULL))
 832                 r=NULL;
 833         else
 834                 r=s->session->peer;
 835
 836         if (r == NULL) return(r);
 837
 838         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 839
 840         return(r);
 841         }
 842
 843 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 844         {
 845         STACK_OF(X509) *r;
 846
 847         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 848                 r=NULL;
 849         else
 850                 r=s->session->sess_cert->cert_chain;
 851
 852         /* If we are a client, cert_chain includes the peer's own
 853          * certificate; if we are a server, it does not. */
 854
 855         return(r);
 856         }
 857
 858 /* Now in theory, since the calling process own 't' it should be safe to
 859  * modify.  We need to be able to read f without being hassled */
 860 void SSL_copy_session_id(SSL *t,const SSL *f)
 861         {
 862         CERT *tmp;
 863
 864         /* Do we need to to SSL locking? */
 865         SSL_set_session(t,SSL_get_session(f));
 866
 867         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 868          * vice-versa */
 869         if (t->method != f->method)
 870                 {
 871                 t->method->ssl_free(t); /* cleanup current */
 872                 t->method=f->method;    /* change method */
 873                 t->method->ssl_new(t);  /* setup new */
 874                 }
 875
 876         tmp=t->cert;
 877         if (f->cert != NULL)
 878                 {
 879                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 880                 t->cert=f->cert;
 881                 }
 882         else
 883                 t->cert=NULL;
 884         if (tmp != NULL) ssl_cert_free(tmp);
 885         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 886         }
 887
 888 /* Fix this so it checks all the valid key/cert options */
 889 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 890         {
 891         if (    (ctx == NULL) ||
 892                 (ctx->cert == NULL) ||
 893                 (ctx->cert->key->x509 == NULL))
 894                 {
 895                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 896                 return(0);
 897                 }
 898         if      (ctx->cert->key->privatekey == NULL)
 899                 {
 900                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 901                 return(0);
 902                 }
 903         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 904         }
 905
 906 /* Fix this function so that it takes an optional type parameter */
 907 int SSL_check_private_key(const SSL *ssl)
 908         {
 909         if (ssl == NULL)
 910                 {
 911                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 912                 return(0);
 913                 }
 914         if (ssl->cert == NULL)
 915                 {
 916                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 917                 return 0;
 918                 }
 919         if (ssl->cert->key->x509 == NULL)
 920                 {
 921                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 922                 return(0);
 923                 }
 924         if (ssl->cert->key->privatekey == NULL)
 925                 {
 926                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 927                 return(0);
 928                 }
 929         return(X509_check_private_key(ssl->cert->key->x509,
 930                 ssl->cert->key->privatekey));
 931         }
 932
 933 int SSL_accept(SSL *s)
 934         {
 935         if (s->handshake_func == 0)
 936                 /* Not properly initialized yet */
 937                 SSL_set_accept_state(s);
 938
 939         return(s->method->ssl_accept(s));
 940         }
 941
 942 int SSL_connect(SSL *s)
 943         {
 944         if (s->handshake_func == 0)
 945                 /* Not properly initialized yet */
 946                 SSL_set_connect_state(s);
 947
 948         return(s->method->ssl_connect(s));
 949         }
 950
 951 long SSL_get_default_timeout(const SSL *s)
 952         {
 953         return(s->method->get_timeout());
 954         }
 955
 956 int SSL_read(SSL *s,void *buf,int num)
 957         {
 958         if (s->handshake_func == 0)
 959                 {
 960                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 961                 return -1;
 962                 }
 963
 964         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 965                 {
 966                 s->rwstate=SSL_NOTHING;
 967                 return(0);
 968                 }
 969         return(s->method->ssl_read(s,buf,num));
 970         }
 971
 972 int SSL_peek(SSL *s,void *buf,int num)
 973         {
 974         if (s->handshake_func == 0)
 975                 {
 976                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 977                 return -1;
 978                 }
 979
 980         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 981                 {
 982                 return(0);
 983                 }
 984         return(s->method->ssl_peek(s,buf,num));
 985         }
 986
 987 int SSL_write(SSL *s,const void *buf,int num)
 988         {
 989         if (s->handshake_func == 0)
 990                 {
 991                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 992                 return -1;
 993                 }
 994
 995         if (s->shutdown & SSL_SENT_SHUTDOWN)
 996                 {
 997                 s->rwstate=SSL_NOTHING;
 998                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 999                 return(-1);
1000                 }
1001         return(s->method->ssl_write(s,buf,num));
1002         }
1003
1004 int SSL_shutdown(SSL *s)
1005         {
1006         /* Note that this function behaves differently from what one might
1007          * expect.  Return values are 0 for no success (yet),
1008          * 1 for success; but calling it once is usually not enough,
1009          * even if blocking I/O is used (see ssl3_shutdown).
1010          */
1011
1012         if (s->handshake_func == 0)
1013                 {
1014                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1015                 return -1;
1016                 }
1017
1018         if ((s != NULL) && !SSL_in_init(s))
1019                 return(s->method->ssl_shutdown(s));
1020         else
1021                 return(1);
1022         }
1023
1024 int SSL_renegotiate(SSL *s)
1025         {
1026         if (s->renegotiate == 0)
1027                 s->renegotiate=1;
1028
1029         s->new_session=1;
1030
1031         return(s->method->ssl_renegotiate(s));
1032         }
1033
1034 int SSL_renegotiate_abbreviated(SSL *s)
1035         {
1036         if (s->renegotiate == 0)
1037                 s->renegotiate=1;
1038
1039         s->new_session=0;
1040
1041         return(s->method->ssl_renegotiate(s));
1042         }
1043
1044 int SSL_renegotiate_pending(SSL *s)
1045         {
1046         /* becomes true when negotiation is requested;
1047          * false again once a handshake has finished */
1048         return (s->renegotiate != 0);
1049         }
1050
1051 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1052         {
1053         long l;
1054
1055         switch (cmd)
1056                 {
1057         case SSL_CTRL_GET_READ_AHEAD:
1058                 return(s->read_ahead);
1059         case SSL_CTRL_SET_READ_AHEAD:
1060                 l=s->read_ahead;
1061                 s->read_ahead=larg;
1062                 return(l);
1063
1064         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1065                 s->msg_callback_arg = parg;
1066                 return 1;
1067
1068         case SSL_CTRL_OPTIONS:
1069                 return(s->options|=larg);
1070         case SSL_CTRL_CLEAR_OPTIONS:
1071                 return(s->options&=~larg);
1072         case SSL_CTRL_MODE:
1073                 return(s->mode|=larg);
1074         case SSL_CTRL_CLEAR_MODE:
1075                 return(s->mode &=~larg);
1076         case SSL_CTRL_GET_MAX_CERT_LIST:
1077                 return(s->max_cert_list);
1078         case SSL_CTRL_SET_MAX_CERT_LIST:
1079                 l=s->max_cert_list;
1080                 s->max_cert_list=larg;
1081                 return(l);
1082         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1083                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1084                         return 0;
1085                 s->max_send_fragment = larg;
1086                 return 1;
1087         case SSL_CTRL_GET_RI_SUPPORT:
1088                 if (s->s3)
1089                         return s->s3->send_connection_binding;
1090                 else return 0;
1091         default:
1092                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1093                 }
1094         }
1095
1096 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1097         {
1098         switch(cmd)
1099                 {
1100         case SSL_CTRL_SET_MSG_CALLBACK:
1101                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1102                 return 1;
1103
1104         default:
1105                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1106                 }
1107         }
1108
1109 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1110         {
1111         return ctx->sessions;
1112         }
1113
1114 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1115         {
1116         long l;
1117
1118         switch (cmd)
1119                 {
1120         case SSL_CTRL_GET_READ_AHEAD:
1121                 return(ctx->read_ahead);
1122         case SSL_CTRL_SET_READ_AHEAD:
1123                 l=ctx->read_ahead;
1124                 ctx->read_ahead=larg;
1125                 return(l);
1126
1127         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1128                 ctx->msg_callback_arg = parg;
1129                 return 1;
1130
1131         case SSL_CTRL_GET_MAX_CERT_LIST:
1132                 return(ctx->max_cert_list);
1133         case SSL_CTRL_SET_MAX_CERT_LIST:
1134                 l=ctx->max_cert_list;
1135                 ctx->max_cert_list=larg;
1136                 return(l);
1137
1138         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1139                 l=ctx->session_cache_size;
1140                 ctx->session_cache_size=larg;
1141                 return(l);
1142         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1143                 return(ctx->session_cache_size);
1144         case SSL_CTRL_SET_SESS_CACHE_MODE:
1145                 l=ctx->session_cache_mode;
1146                 ctx->session_cache_mode=larg;
1147                 return(l);
1148         case SSL_CTRL_GET_SESS_CACHE_MODE:
1149                 return(ctx->session_cache_mode);
1150
1151         case SSL_CTRL_SESS_NUMBER:
1152                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1153         case SSL_CTRL_SESS_CONNECT:
1154                 return(ctx->stats.sess_connect);
1155         case SSL_CTRL_SESS_CONNECT_GOOD:
1156                 return(ctx->stats.sess_connect_good);
1157         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1158                 return(ctx->stats.sess_connect_renegotiate);
1159         case SSL_CTRL_SESS_ACCEPT:
1160                 return(ctx->stats.sess_accept);
1161         case SSL_CTRL_SESS_ACCEPT_GOOD:
1162                 return(ctx->stats.sess_accept_good);
1163         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1164                 return(ctx->stats.sess_accept_renegotiate);
1165         case SSL_CTRL_SESS_HIT:
1166                 return(ctx->stats.sess_hit);
1167         case SSL_CTRL_SESS_CB_HIT:
1168                 return(ctx->stats.sess_cb_hit);
1169         case SSL_CTRL_SESS_MISSES:
1170                 return(ctx->stats.sess_miss);
1171         case SSL_CTRL_SESS_TIMEOUTS:
1172                 return(ctx->stats.sess_timeout);
1173         case SSL_CTRL_SESS_CACHE_FULL:
1174                 return(ctx->stats.sess_cache_full);
1175         case SSL_CTRL_OPTIONS:
1176                 return(ctx->options|=larg);
1177         case SSL_CTRL_CLEAR_OPTIONS:
1178                 return(ctx->options&=~larg);
1179         case SSL_CTRL_MODE:
1180                 return(ctx->mode|=larg);
1181         case SSL_CTRL_CLEAR_MODE:
1182                 return(ctx->mode&=~larg);
1183         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1184                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1185                         return 0;
1186                 ctx->max_send_fragment = larg;
1187                 return 1;
1188         default:
1189                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1190                 }
1191         }
1192
1193 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1194         {
1195         switch(cmd)
1196                 {
1197         case SSL_CTRL_SET_MSG_CALLBACK:
1198                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1199                 return 1;
1200
1201         default:
1202                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1203                 }
1204         }
1205
1206 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1207         {
1208         long l;
1209
1210         l=a->id-b->id;
1211         if (l == 0L)
1212                 return(0);
1213         else
1214                 return((l > 0)?1:-1);
1215         }
1216
1217 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1218                         const SSL_CIPHER * const *bp)
1219         {
1220         long l;
1221
1222         l=(*ap)->id-(*bp)->id;
1223         if (l == 0L)
1224                 return(0);
1225         else
1226                 return((l > 0)?1:-1);
1227         }
1228
1229 /** return a STACK of the ciphers available for the SSL and in order of
1230  * preference */
1231 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1232         {
1233         if (s != NULL)
1234                 {
1235                 if (s->cipher_list != NULL)
1236                         {
1237                         return(s->cipher_list);
1238                         }
1239                 else if ((s->ctx != NULL) &&
1240                         (s->ctx->cipher_list != NULL))
1241                         {
1242                         return(s->ctx->cipher_list);
1243                         }
1244                 }
1245         return(NULL);
1246         }
1247
1248 /** return a STACK of the ciphers available for the SSL and in order of
1249  * algorithm id */
1250 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1251         {
1252         if (s != NULL)
1253                 {
1254                 if (s->cipher_list_by_id != NULL)
1255                         {
1256                         return(s->cipher_list_by_id);
1257                         }
1258                 else if ((s->ctx != NULL) &&
1259                         (s->ctx->cipher_list_by_id != NULL))
1260                         {
1261                         return(s->ctx->cipher_list_by_id);
1262                         }
1263                 }
1264         return(NULL);
1265         }
1266
1267 /** The old interface to get the same thing as SSL_get_ciphers() */
1268 const char *SSL_get_cipher_list(const SSL *s,int n)
1269         {
1270         SSL_CIPHER *c;
1271         STACK_OF(SSL_CIPHER) *sk;
1272
1273         if (s == NULL) return(NULL);
1274         sk=SSL_get_ciphers(s);
1275         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1276                 return(NULL);
1277         c=sk_SSL_CIPHER_value(sk,n);
1278         if (c == NULL) return(NULL);
1279         return(c->name);
1280         }
1281
1282 /** specify the ciphers to be used by default by the SSL_CTX */
1283 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1284         {
1285         STACK_OF(SSL_CIPHER) *sk;
1286
1287         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1288                 &ctx->cipher_list_by_id,str);
1289         /* ssl_create_cipher_list may return an empty stack if it
1290          * was unable to find a cipher matching the given rule string
1291          * (for example if the rule string specifies a cipher which
1292          * has been disabled). This is not an error as far as
1293          * ssl_create_cipher_list is concerned, and hence
1294          * ctx->cipher_list and ctx->cipher_list_by_id has been
1295          * updated. */
1296         if (sk == NULL)
1297                 return 0;
1298         else if (sk_SSL_CIPHER_num(sk) == 0)
1299                 {
1300                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1301                 return 0;
1302                 }
1303         return 1;
1304         }
1305
1306 /** specify the ciphers to be used by the SSL */
1307 int SSL_set_cipher_list(SSL *s,const char *str)
1308         {
1309         STACK_OF(SSL_CIPHER) *sk;
1310
1311         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1312                 &s->cipher_list_by_id,str);
1313         /* see comment in SSL_CTX_set_cipher_list */
1314         if (sk == NULL)
1315                 return 0;
1316         else if (sk_SSL_CIPHER_num(sk) == 0)
1317                 {
1318                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1319                 return 0;
1320                 }
1321         return 1;
1322         }
1323
1324 /* works well for SSLv2, not so good for SSLv3 */
1325 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1326         {
1327         char *p;
1328         STACK_OF(SSL_CIPHER) *sk;
1329         SSL_CIPHER *c;
1330         int i;
1331
1332         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1333                 (len < 2))
1334                 return(NULL);
1335
1336         p=buf;
1337         sk=s->session->ciphers;
1338
1339         if (sk_SSL_CIPHER_num(sk) == 0)
1340                 return NULL;
1341
1342         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1343                 {
1344                 int n;
1345
1346                 c=sk_SSL_CIPHER_value(sk,i);
1347                 n=strlen(c->name);
1348                 if (n+1 > len)
1349                         {
1350                         if (p != buf)
1351                                 --p;
1352                         *p='\0';
1353                         return buf;
1354                         }
1355                 strcpy(p,c->name);
1356                 p+=n;
1357                 *(p++)=':';
1358                 len-=n+1;
1359                 }
1360         p[-1]='\0';
1361         return(buf);
1362         }
1363
1364 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1365                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1366         {
1367         int i,j=0;
1368         SSL_CIPHER *c;
1369         unsigned char *q;
1370 #ifndef OPENSSL_NO_KRB5
1371         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1372 #endif /* OPENSSL_NO_KRB5 */
1373
1374         if (sk == NULL) return(0);
1375         q=p;
1376         if (put_cb == NULL)
1377                 put_cb = s->method->put_cipher_by_char;
1378
1379         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1380                 {
1381                 c=sk_SSL_CIPHER_value(sk,i);
1382                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1383                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1384                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1385                         continue;
1386 #ifndef OPENSSL_NO_KRB5
1387                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1388                     nokrb5)
1389                     continue;
1390 #endif /* OPENSSL_NO_KRB5 */
1391 #ifndef OPENSSL_NO_PSK
1392                 /* with PSK there must be client callback set */
1393                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1394                     s->psk_client_callback == NULL)
1395                         continue;
1396 #endif /* OPENSSL_NO_PSK */
1397 #ifndef OPENSSL_NO_SRP
1398                 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
1399                     !(s->srp_ctx.srp_Mask & SSL_kSRP))
1400                     continue;
1401 #endif /* OPENSSL_NO_SRP */
1402                 j = put_cb(c,p);
1403                 p+=j;
1404                 }
1405         /* If p == q, no ciphers; caller indicates an error.
1406          * Otherwise, add applicable SCSVs. */
1407         if (p != q)
1408                 {
1409                 if (!s->renegotiate)
1410                         {
1411                         static SSL_CIPHER scsv =
1412                                 {
1413                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1414                                 };
1415                         j = put_cb(&scsv,p);
1416                         p+=j;
1417 #ifdef OPENSSL_RI_DEBUG
1418                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1419 #endif
1420                         }
1421
1422                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1423                         {
1424                         static SSL_CIPHER scsv =
1425                                 {
1426                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1427                                 };
1428                         j = put_cb(&scsv,p);
1429                         p+=j;
1430                         }
1431                 }
1432
1433         return(p-q);
1434         }
1435
1436 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1437                                                STACK_OF(SSL_CIPHER) **skp)
1438         {
1439         const SSL_CIPHER *c;
1440         STACK_OF(SSL_CIPHER) *sk;
1441         int i,n;
1442
1443         if (s->s3)
1444                 s->s3->send_connection_binding = 0;
1445
1446         n=ssl_put_cipher_by_char(s,NULL,NULL);
1447         if (n == 0 || (num%n) != 0)
1448                 {
1449                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1450                 return(NULL);
1451                 }
1452         if ((skp == NULL) || (*skp == NULL))
1453                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1454         else
1455                 {
1456                 sk= *skp;
1457                 sk_SSL_CIPHER_zero(sk);
1458                 }
1459
1460         for (i=0; i<num; i+=n)
1461                 {
1462                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1463                 if (s->s3 && (n != 3 || !p[0]) &&
1464                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1465                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1466                         {
1467                         /* SCSV fatal if renegotiating */
1468                         if (s->renegotiate)
1469                                 {
1470                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1471                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1472                                 goto err;
1473                                 }
1474                         s->s3->send_connection_binding = 1;
1475                         p += n;
1476 #ifdef OPENSSL_RI_DEBUG
1477                         fprintf(stderr, "SCSV received by server\n");
1478 #endif
1479                         continue;
1480                         }
1481
1482                 /* Check for TLS_FALLBACK_SCSV */
1483                 if ((n != 3 || !p[0]) &&
1484                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1485                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1486                         {
1487                         /* The SCSV indicates that the client previously tried a higher version.
1488                          * Fail if the current version is an unexpected downgrade. */
1489                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1490                                 {
1491                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1492                                 if (s->s3)
1493                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1494                                 goto err;
1495                                 }
1496                         p += n;
1497                         continue;
1498                         }
1499
1500                 c=ssl_get_cipher_by_char(s,p);
1501                 p+=n;
1502                 if (c != NULL)
1503                         {
1504                         if (!sk_SSL_CIPHER_push(sk,c))
1505                                 {
1506                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1507                                 goto err;
1508                                 }
1509                         }
1510                 }
1511
1512         if (skp != NULL)
1513                 *skp=sk;
1514         return(sk);
1515 err:
1516         if ((skp == NULL) || (*skp == NULL))
1517                 sk_SSL_CIPHER_free(sk);
1518         return(NULL);
1519         }
1520
1521
1522 #ifndef OPENSSL_NO_TLSEXT
1523 /** return a servername extension value if provided in Client Hello, or NULL.
1524  * So far, only host_name types are defined (RFC 3546).
1525  */
1526
1527 const char *SSL_get_servername(const SSL *s, const int type)
1528         {
1529         if (type != TLSEXT_NAMETYPE_host_name)
1530                 return NULL;
1531
1532         return s->session && !s->tlsext_hostname ?
1533                 s->session->tlsext_hostname :
1534                 s->tlsext_hostname;
1535         }
1536
1537 int SSL_get_servername_type(const SSL *s)
1538         {
1539         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1540                 return TLSEXT_NAMETYPE_host_name;
1541         return -1;
1542         }
1543
1544 # ifndef OPENSSL_NO_NEXTPROTONEG
1545 /* SSL_select_next_proto implements the standard protocol selection. It is
1546  * expected that this function is called from the callback set by
1547  * SSL_CTX_set_next_proto_select_cb.
1548  *
1549  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1550  * strings. The length byte itself is not included in the length. A byte
1551  * string of length 0 is invalid. No byte string may be truncated.
1552  *
1553  * The current, but experimental algorithm for selecting the protocol is:
1554  *
1555  * 1) If the server doesn't support NPN then this is indicated to the
1556  * callback. In this case, the client application has to abort the connection
1557  * or have a default application level protocol.
1558  *
1559  * 2) If the server supports NPN, but advertises an empty list then the
1560  * client selects the first protcol in its list, but indicates via the
1561  * API that this fallback case was enacted.
1562  *
1563  * 3) Otherwise, the client finds the first protocol in the server's list
1564  * that it supports and selects this protocol. This is because it's
1565  * assumed that the server has better information about which protocol
1566  * a client should use.
1567  *
1568  * 4) If the client doesn't support any of the server's advertised
1569  * protocols, then this is treated the same as case 2.
1570  *
1571  * It returns either
1572  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1573  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1574  */
1575 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsigned char *server, unsigned int server_len, const unsigned char *client, unsigned int client_len)
1576         {
1577         unsigned int i, j;
1578         const unsigned char *result;
1579         int status = OPENSSL_NPN_UNSUPPORTED;
1580
1581         /* For each protocol in server preference order, see if we support it. */
1582         for (i = 0; i < server_len; )
1583                 {
1584                 for (j = 0; j < client_len; )
1585                         {
1586                         if (server[i] == client[j] &&
1587                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1588                                 {
1589                                 /* We found a match */
1590                                 result = &server[i];
1591                                 status = OPENSSL_NPN_NEGOTIATED;
1592                                 goto found;
1593                                 }
1594                         j += client[j];
1595                         j++;
1596                         }
1597                 i += server[i];
1598                 i++;
1599                 }
1600
1601         /* There's no overlap between our protocols and the server's list. */
1602         result = client;
1603         status = OPENSSL_NPN_NO_OVERLAP;
1604
1605         found:
1606         *out = (unsigned char *) result + 1;
1607         *outlen = result[0];
1608         return status;
1609         }
1610
1611 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1612  * requested protocol for this connection and returns 0. If the client didn't
1613  * request any protocol, then *data is set to NULL.
1614  *
1615  * Note that the client can request any protocol it chooses. The value returned
1616  * from this function need not be a member of the list of supported protocols
1617  * provided by the callback.
1618  */
1619 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1620         {
1621         *data = s->next_proto_negotiated;
1622         if (!*data) {
1623                 *len = 0;
1624         } else {
1625                 *len = s->next_proto_negotiated_len;
1626         }
1627 }
1628
1629 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1630  * TLS server needs a list of supported protocols for Next Protocol
1631  * Negotiation. The returned list must be in wire format.  The list is returned
1632  * by setting |out| to point to it and |outlen| to its length. This memory will
1633  * not be modified, but one should assume that the SSL* keeps a reference to
1634  * it.
1635  *
1636  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1637  * such extension will be included in the ServerHello. */
1638 void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
1639         {
1640         ctx->next_protos_advertised_cb = cb;
1641         ctx->next_protos_advertised_cb_arg = arg;
1642         }
1643
1644 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1645  * client needs to select a protocol from the server's provided list. |out|
1646  * must be set to point to the selected protocol (which may be within |in|).
1647  * The length of the protocol name must be written into |outlen|. The server's
1648  * advertised protocols are provided in |in| and |inlen|. The callback can
1649  * assume that |in| is syntactically valid.
1650  *
1651  * The client must select a protocol. It is fatal to the connection if this
1652  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1653  */
1654 void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg), void *arg)
1655         {
1656         ctx->next_proto_select_cb = cb;
1657         ctx->next_proto_select_cb_arg = arg;
1658         }
1659 # endif
1660 #endif
1661
1662 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1663         const char *label, size_t llen, const unsigned char *p, size_t plen,
1664         int use_context)
1665         {
1666         if (s->version < TLS1_VERSION)
1667                 return -1;
1668
1669         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1670                                                            llen, p, plen,
1671                                                            use_context);
1672         }
1673
1674 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1675         {
1676         unsigned long l;
1677
1678         l=(unsigned long)
1679                 ((unsigned int) a->session_id[0]     )|
1680                 ((unsigned int) a->session_id[1]<< 8L)|
1681                 ((unsigned long)a->session_id[2]<<16L)|
1682                 ((unsigned long)a->session_id[3]<<24L);
1683         return(l);
1684         }
1685
1686 /* NB: If this function (or indeed the hash function which uses a sort of
1687  * coarser function than this one) is changed, ensure
1688  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1689  * able to construct an SSL_SESSION that will collide with any existing session
1690  * with a matching session ID. */
1691 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1692         {
1693         if (a->ssl_version != b->ssl_version)
1694                 return(1);
1695         if (a->session_id_length != b->session_id_length)
1696                 return(1);
1697         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1698         }
1699
1700 /* These wrapper functions should remain rather than redeclaring
1701  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1702  * variable. The reason is that the functions aren't static, they're exposed via
1703  * ssl.h. */
1704 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1705 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1706
1707 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1708         {
1709         SSL_CTX *ret=NULL;
1710
1711         if (meth == NULL)
1712                 {
1713                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1714                 return(NULL);
1715                 }
1716
1717 #ifdef OPENSSL_FIPS
1718         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1719                 {
1720                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1721                 return NULL;
1722                 }
1723 #endif
1724
1725         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1726                 {
1727                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1728                 goto err;
1729                 }
1730         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1731         if (ret == NULL)
1732                 goto err;
1733
1734         memset(ret,0,sizeof(SSL_CTX));
1735
1736         ret->method=meth;
1737
1738         ret->cert_store=NULL;
1739         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1740         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1741         ret->session_cache_head=NULL;
1742         ret->session_cache_tail=NULL;
1743
1744         /* We take the system default */
1745         ret->session_timeout=meth->get_timeout();
1746
1747         ret->new_session_cb=0;
1748         ret->remove_session_cb=0;
1749         ret->get_session_cb=0;
1750         ret->generate_session_id=0;
1751
1752         memset((char *)&ret->stats,0,sizeof(ret->stats));
1753
1754         ret->references=1;
1755         ret->quiet_shutdown=0;
1756
1757 /*      ret->cipher=NULL;*/
1758 /*-
1759         ret->s2->challenge=NULL;
1760         ret->master_key=NULL;
1761         ret->key_arg=NULL;
1762         ret->s2->conn_id=NULL; */
1763
1764         ret->info_callback=NULL;
1765
1766         ret->app_verify_callback=0;
1767         ret->app_verify_arg=NULL;
1768
1769         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1770         ret->read_ahead=0;
1771         ret->msg_callback=0;
1772         ret->msg_callback_arg=NULL;
1773         ret->verify_mode=SSL_VERIFY_NONE;
1774 #if 0
1775         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1776 #endif
1777         ret->sid_ctx_length=0;
1778         ret->default_verify_callback=NULL;
1779         if ((ret->cert=ssl_cert_new()) == NULL)
1780                 goto err;
1781
1782         ret->default_passwd_callback=0;
1783         ret->default_passwd_callback_userdata=NULL;
1784         ret->client_cert_cb=0;
1785         ret->app_gen_cookie_cb=0;
1786         ret->app_verify_cookie_cb=0;
1787
1788         ret->sessions=lh_SSL_SESSION_new();
1789         if (ret->sessions == NULL) goto err;
1790         ret->cert_store=X509_STORE_new();
1791         if (ret->cert_store == NULL) goto err;
1792
1793         ssl_create_cipher_list(ret->method,
1794                 &ret->cipher_list,&ret->cipher_list_by_id,
1795                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1796         if (ret->cipher_list == NULL
1797             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1798                 {
1799                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1800                 goto err2;
1801                 }
1802
1803         ret->param = X509_VERIFY_PARAM_new();
1804         if (!ret->param)
1805                 goto err;
1806
1807         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1808                 {
1809                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1810                 goto err2;
1811                 }
1812         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1813                 {
1814                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1815                 goto err2;
1816                 }
1817         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1818                 {
1819                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1820                 goto err2;
1821                 }
1822
1823         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1824                 goto err;
1825
1826         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1827
1828         ret->extra_certs=NULL;
1829         /* No compression for DTLS */
1830         if (meth->version != DTLS1_VERSION)
1831                 ret->comp_methods=SSL_COMP_get_compression_methods();
1832
1833         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1834
1835 #ifndef OPENSSL_NO_TLSEXT
1836         ret->tlsext_servername_callback = 0;
1837         ret->tlsext_servername_arg = NULL;
1838         /* Setup RFC4507 ticket keys */
1839         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1840                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1841                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1842                 ret->options |= SSL_OP_NO_TICKET;
1843
1844         ret->tlsext_status_cb = 0;
1845         ret->tlsext_status_arg = NULL;
1846
1847 # ifndef OPENSSL_NO_NEXTPROTONEG
1848         ret->next_protos_advertised_cb = 0;
1849         ret->next_proto_select_cb = 0;
1850 # endif
1851 #endif
1852 #ifndef OPENSSL_NO_PSK
1853         ret->psk_identity_hint=NULL;
1854         ret->psk_client_callback=NULL;
1855         ret->psk_server_callback=NULL;
1856 #endif
1857 #ifndef OPENSSL_NO_SRP
1858         SSL_CTX_SRP_CTX_init(ret);
1859 #endif
1860 #ifndef OPENSSL_NO_BUF_FREELISTS
1861         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1862         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1863         if (!ret->rbuf_freelist)
1864                 goto err;
1865         ret->rbuf_freelist->chunklen = 0;
1866         ret->rbuf_freelist->len = 0;
1867         ret->rbuf_freelist->head = NULL;
1868         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1869         if (!ret->wbuf_freelist)
1870                 {
1871                 OPENSSL_free(ret->rbuf_freelist);
1872                 goto err;
1873                 }
1874         ret->wbuf_freelist->chunklen = 0;
1875         ret->wbuf_freelist->len = 0;
1876         ret->wbuf_freelist->head = NULL;
1877 #endif
1878 #ifndef OPENSSL_NO_ENGINE
1879         ret->client_cert_engine = NULL;
1880 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1881 #define eng_strx(x)     #x
1882 #define eng_str(x)      eng_strx(x)
1883         /* Use specific client engine automatically... ignore errors */
1884         {
1885         ENGINE *eng;
1886         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1887         if (!eng)
1888                 {
1889                 ERR_clear_error();
1890                 ENGINE_load_builtin_engines();
1891                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1892                 }
1893         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1894                 ERR_clear_error();
1895         }
1896 #endif
1897 #endif
1898         /* Default is to connect to non-RI servers. When RI is more widely
1899          * deployed might change this.
1900          */
1901         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1902
1903         return(ret);
1904 err:
1905         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1906 err2:
1907         if (ret != NULL) SSL_CTX_free(ret);
1908         return(NULL);
1909         }
1910
1911 #if 0
1912 static void SSL_COMP_free(SSL_COMP *comp)
1913     { OPENSSL_free(comp); }
1914 #endif
1915
1916 #ifndef OPENSSL_NO_BUF_FREELISTS
1917 static void
1918 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1919         {
1920         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1921         for (ent = list->head; ent; ent = next)
1922                 {
1923                 next = ent->next;
1924                 OPENSSL_free(ent);
1925                 }
1926         OPENSSL_free(list);
1927         }
1928 #endif
1929
1930 void SSL_CTX_free(SSL_CTX *a)
1931         {
1932         int i;
1933
1934         if (a == NULL) return;
1935
1936         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1937 #ifdef REF_PRINT
1938         REF_PRINT("SSL_CTX",a);
1939 #endif
1940         if (i > 0) return;
1941 #ifdef REF_CHECK
1942         if (i < 0)
1943                 {
1944                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1945                 abort(); /* ok */
1946                 }
1947 #endif
1948
1949         if (a->param)
1950                 X509_VERIFY_PARAM_free(a->param);
1951
1952         /*
1953          * Free internal session cache. However: the remove_cb() may reference
1954          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1955          * after the sessions were flushed.
1956          * As the ex_data handling routines might also touch the session cache,
1957          * the most secure solution seems to be: empty (flush) the cache, then
1958          * free ex_data, then finally free the cache.
1959          * (See ticket [openssl.org #212].)
1960          */
1961         if (a->sessions != NULL)
1962                 SSL_CTX_flush_sessions(a,0);
1963
1964         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1965
1966         if (a->sessions != NULL)
1967                 lh_SSL_SESSION_free(a->sessions);
1968
1969         if (a->cert_store != NULL)
1970                 X509_STORE_free(a->cert_store);
1971         if (a->cipher_list != NULL)
1972                 sk_SSL_CIPHER_free(a->cipher_list);
1973         if (a->cipher_list_by_id != NULL)
1974                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1975         if (a->cert != NULL)
1976                 ssl_cert_free(a->cert);
1977         if (a->client_CA != NULL)
1978                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1979         if (a->extra_certs != NULL)
1980                 sk_X509_pop_free(a->extra_certs,X509_free);
1981 #if 0 /* This should never be done, since it removes a global database */
1982         if (a->comp_methods != NULL)
1983                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1984 #else
1985         a->comp_methods = NULL;
1986 #endif
1987
1988 #ifndef OPENSSL_NO_SRTP
1989         if (a->srtp_profiles)
1990                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1991 #endif
1992
1993 #ifndef OPENSSL_NO_PSK
1994         if (a->psk_identity_hint)
1995                 OPENSSL_free(a->psk_identity_hint);
1996 #endif
1997 #ifndef OPENSSL_NO_SRP
1998         SSL_CTX_SRP_CTX_free(a);
1999 #endif
2000 #ifndef OPENSSL_NO_ENGINE
2001         if (a->client_cert_engine)
2002                 ENGINE_finish(a->client_cert_engine);
2003 #endif
2004
2005 #ifndef OPENSSL_NO_BUF_FREELISTS
2006         if (a->wbuf_freelist)
2007                 ssl_buf_freelist_free(a->wbuf_freelist);
2008         if (a->rbuf_freelist)
2009                 ssl_buf_freelist_free(a->rbuf_freelist);
2010 #endif
2011
2012         OPENSSL_free(a);
2013         }
2014
2015 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2016         {
2017         ctx->default_passwd_callback=cb;
2018         }
2019
2020 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2021         {
2022         ctx->default_passwd_callback_userdata=u;
2023         }
2024
2025 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2026         {
2027         ctx->app_verify_callback=cb;
2028         ctx->app_verify_arg=arg;
2029         }
2030
2031 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2032         {
2033         ctx->verify_mode=mode;
2034         ctx->default_verify_callback=cb;
2035         }
2036
2037 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2038         {
2039         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2040         }
2041
2042 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2043         {
2044         CERT_PKEY *cpk;
2045         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2046         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2047         int rsa_tmp_export,dh_tmp_export,kl;
2048         unsigned long mask_k,mask_a,emask_k,emask_a;
2049         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2050 #ifndef OPENSSL_NO_ECDH
2051         int have_ecdh_tmp;
2052 #endif
2053         X509 *x = NULL;
2054         EVP_PKEY *ecc_pkey = NULL;
2055         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2056
2057         if (c == NULL) return;
2058
2059         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2060
2061 #ifndef OPENSSL_NO_RSA
2062         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2063         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2064                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2065 #else
2066         rsa_tmp=rsa_tmp_export=0;
2067 #endif
2068 #ifndef OPENSSL_NO_DH
2069         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2070         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2071                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2072 #else
2073         dh_tmp=dh_tmp_export=0;
2074 #endif
2075
2076 #ifndef OPENSSL_NO_ECDH
2077         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2078 #endif
2079         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2080         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2081         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2082         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2083         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2084         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2085         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2086         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2087         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2088         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2089         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2090 /* FIX THIS EAY EAY EAY */
2091         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2092         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2093         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2094         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2095         mask_k=0;
2096         mask_a=0;
2097         emask_k=0;
2098         emask_a=0;
2099
2100
2101
2102 #ifdef CIPHER_DEBUG
2103         fprintf(stderr,"rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2104                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2105                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2106 #endif
2107
2108         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2109         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2110                 mask_k |= SSL_kGOST;
2111                 mask_a |= SSL_aGOST01;
2112         }
2113         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2114         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2115                 mask_k |= SSL_kGOST;
2116                 mask_a |= SSL_aGOST94;
2117         }
2118
2119         if (rsa_enc || (rsa_tmp && rsa_sign))
2120                 mask_k|=SSL_kRSA;
2121         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2122                 emask_k|=SSL_kRSA;
2123
2124 #if 0
2125         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2126         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2127                 (rsa_enc || rsa_sign || dsa_sign))
2128                 mask_k|=SSL_kEDH;
2129         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2130                 (rsa_enc || rsa_sign || dsa_sign))
2131                 emask_k|=SSL_kEDH;
2132 #endif
2133
2134         if (dh_tmp_export)
2135                 emask_k|=SSL_kEDH;
2136
2137         if (dh_tmp)
2138                 mask_k|=SSL_kEDH;
2139
2140         if (dh_rsa) mask_k|=SSL_kDHr;
2141         if (dh_rsa_export) emask_k|=SSL_kDHr;
2142
2143         if (dh_dsa) mask_k|=SSL_kDHd;
2144         if (dh_dsa_export) emask_k|=SSL_kDHd;
2145
2146         if (rsa_enc || rsa_sign)
2147                 {
2148                 mask_a|=SSL_aRSA;
2149                 emask_a|=SSL_aRSA;
2150                 }
2151
2152         if (dsa_sign)
2153                 {
2154                 mask_a|=SSL_aDSS;
2155                 emask_a|=SSL_aDSS;
2156                 }
2157
2158         mask_a|=SSL_aNULL;
2159         emask_a|=SSL_aNULL;
2160
2161 #ifndef OPENSSL_NO_KRB5
2162         mask_k|=SSL_kKRB5;
2163         mask_a|=SSL_aKRB5;
2164         emask_k|=SSL_kKRB5;
2165         emask_a|=SSL_aKRB5;
2166 #endif
2167
2168         /* An ECC certificate may be usable for ECDH and/or
2169          * ECDSA cipher suites depending on the key usage extension.
2170          */
2171         if (have_ecc_cert)
2172                 {
2173                 /* This call populates extension flags (ex_flags) */
2174                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2175                 X509_check_purpose(x, -1, 0);
2176                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2177                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2178                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2179                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2180                 ecc_pkey = X509_get_pubkey(x);
2181                 ecc_pkey_size = (ecc_pkey != NULL) ?
2182                     EVP_PKEY_bits(ecc_pkey) : 0;
2183                 EVP_PKEY_free(ecc_pkey);
2184                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2185                         {
2186                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2187                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2188                         }
2189 #ifndef OPENSSL_NO_ECDH
2190                 if (ecdh_ok)
2191                         {
2192
2193                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2194                                 {
2195                                 mask_k|=SSL_kECDHr;
2196                                 mask_a|=SSL_aECDH;
2197                                 if (ecc_pkey_size <= 163)
2198                                         {
2199                                         emask_k|=SSL_kECDHr;
2200                                         emask_a|=SSL_aECDH;
2201                                         }
2202                                 }
2203
2204                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2205                                 {
2206                                 mask_k|=SSL_kECDHe;
2207                                 mask_a|=SSL_aECDH;
2208                                 if (ecc_pkey_size <= 163)
2209                                         {
2210                                         emask_k|=SSL_kECDHe;
2211                                         emask_a|=SSL_aECDH;
2212                                         }
2213                                 }
2214                         }
2215 #endif
2216 #ifndef OPENSSL_NO_ECDSA
2217                 if (ecdsa_ok)
2218                         {
2219                         mask_a|=SSL_aECDSA;
2220                         emask_a|=SSL_aECDSA;
2221                         }
2222 #endif
2223                 }
2224
2225 #ifndef OPENSSL_NO_ECDH
2226         if (have_ecdh_tmp)
2227                 {
2228                 mask_k|=SSL_kEECDH;
2229                 emask_k|=SSL_kEECDH;
2230                 }
2231 #endif
2232
2233 #ifndef OPENSSL_NO_PSK
2234         mask_k |= SSL_kPSK;
2235         mask_a |= SSL_aPSK;
2236         emask_k |= SSL_kPSK;
2237         emask_a |= SSL_aPSK;
2238 #endif
2239
2240         c->mask_k=mask_k;
2241         c->mask_a=mask_a;
2242         c->export_mask_k=emask_k;
2243         c->export_mask_a=emask_a;
2244         c->valid=1;
2245         }
2246
2247 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2248 #define ku_reject(x, usage) \
2249         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2250
2251 #ifndef OPENSSL_NO_EC
2252
2253 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2254         {
2255         unsigned long alg_k, alg_a;
2256         EVP_PKEY *pkey = NULL;
2257         int keysize = 0;
2258         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2259         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2260
2261         alg_k = cs->algorithm_mkey;
2262         alg_a = cs->algorithm_auth;
2263
2264         if (SSL_C_IS_EXPORT(cs))
2265                 {
2266                 /* ECDH key length in export ciphers must be <= 163 bits */
2267                 pkey = X509_get_pubkey(x);
2268                 if (pkey == NULL) return 0;
2269                 keysize = EVP_PKEY_bits(pkey);
2270                 EVP_PKEY_free(pkey);
2271                 if (keysize > 163) return 0;
2272                 }
2273
2274         /* This call populates the ex_flags field correctly */
2275         X509_check_purpose(x, -1, 0);
2276         if ((x->sig_alg) && (x->sig_alg->algorithm))
2277                 {
2278                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2279                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2280                 }
2281         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2282                 {
2283                 /* key usage, if present, must allow key agreement */
2284                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2285                         {
2286                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2287                         return 0;
2288                         }
2289                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2290                         {
2291                         /* signature alg must be ECDSA */
2292                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2293                                 {
2294                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2295                                 return 0;
2296                                 }
2297                         }
2298                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2299                         {
2300                         /* signature alg must be RSA */
2301
2302                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2303                                 {
2304                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2305                                 return 0;
2306                                 }
2307                         }
2308                 }
2309         if (alg_a & SSL_aECDSA)
2310                 {
2311                 /* key usage, if present, must allow signing */
2312                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2313                         {
2314                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2315                         return 0;
2316                         }
2317                 }
2318
2319         return 1;  /* all checks are ok */
2320         }
2321
2322 #endif
2323
2324 /* THIS NEEDS CLEANING UP */
2325 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2326         {
2327         unsigned long alg_k,alg_a;
2328         CERT *c;
2329         int i;
2330
2331         c=s->cert;
2332         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2333
2334         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2335         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2336
2337         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2338                 {
2339                 /* we don't need to look at SSL_kEECDH
2340                  * since no certificate is needed for
2341                  * anon ECDH and for authenticated
2342                  * EECDH, the check for the auth
2343                  * algorithm will set i correctly
2344                  * NOTE: For ECDH-RSA, we need an ECC
2345                  * not an RSA cert but for EECDH-RSA
2346                  * we need an RSA cert. Placing the
2347                  * checks for SSL_kECDH before RSA
2348                  * checks ensures the correct cert is chosen.
2349                  */
2350                 i=SSL_PKEY_ECC;
2351                 }
2352         else if (alg_a & SSL_aECDSA)
2353                 {
2354                 i=SSL_PKEY_ECC;
2355                 }
2356         else if (alg_k & SSL_kDHr)
2357                 i=SSL_PKEY_DH_RSA;
2358         else if (alg_k & SSL_kDHd)
2359                 i=SSL_PKEY_DH_DSA;
2360         else if (alg_a & SSL_aDSS)
2361                 i=SSL_PKEY_DSA_SIGN;
2362         else if (alg_a & SSL_aRSA)
2363                 {
2364                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2365                         i=SSL_PKEY_RSA_SIGN;
2366                 else
2367                         i=SSL_PKEY_RSA_ENC;
2368                 }
2369         else if (alg_a & SSL_aKRB5)
2370                 {
2371                 /* VRS something else here? */
2372                 return(NULL);
2373                 }
2374         else if (alg_a & SSL_aGOST94)
2375                 i=SSL_PKEY_GOST94;
2376         else if (alg_a & SSL_aGOST01)
2377                 i=SSL_PKEY_GOST01;
2378         else /* if (alg_a & SSL_aNULL) */
2379                 {
2380                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2381                 return(NULL);
2382                 }
2383
2384         return c->pkeys + i;
2385         }
2386
2387 X509 *ssl_get_server_send_cert(const SSL *s)
2388         {
2389         CERT_PKEY *cpk;
2390         cpk = ssl_get_server_send_pkey(s);
2391         if (!cpk)
2392                 return NULL;
2393         return cpk->x509;
2394         }
2395
2396 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2397         {
2398         unsigned long alg_a;
2399         CERT *c;
2400         int idx = -1;
2401
2402         alg_a = cipher->algorithm_auth;
2403         c=s->cert;
2404
2405         if ((alg_a & SSL_aDSS) &&
2406                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2407                 idx = SSL_PKEY_DSA_SIGN;
2408         else if (alg_a & SSL_aRSA)
2409                 {
2410                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2411                         idx = SSL_PKEY_RSA_SIGN;
2412                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2413                         idx = SSL_PKEY_RSA_ENC;
2414                 }
2415         else if ((alg_a & SSL_aECDSA) &&
2416                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2417                 idx = SSL_PKEY_ECC;
2418         if (idx == -1)
2419                 {
2420                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2421                 return(NULL);
2422                 }
2423         if (pmd)
2424                 *pmd = c->pkeys[idx].digest;
2425         return c->pkeys[idx].privatekey;
2426         }
2427
2428 void ssl_update_cache(SSL *s,int mode)
2429         {
2430         int i;
2431
2432         /* If the session_id_length is 0, we are not supposed to cache it,
2433          * and it would be rather hard to do anyway :-) */
2434         if (s->session->session_id_length == 0) return;
2435
2436         i=s->session_ctx->session_cache_mode;
2437         if ((i & mode) && (!s->hit)
2438                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2439                     || SSL_CTX_add_session(s->session_ctx,s->session))
2440                 && (s->session_ctx->new_session_cb != NULL))
2441                 {
2442                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2443                 if (!s->session_ctx->new_session_cb(s,s->session))
2444                         SSL_SESSION_free(s->session);
2445                 }
2446
2447         /* auto flush every 255 connections */
2448         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2449                 ((i & mode) == mode))
2450                 {
2451                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2452                         ?s->session_ctx->stats.sess_connect_good
2453                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2454                         {
2455                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2456                         }
2457                 }
2458         }
2459
2460 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2461         {
2462         return(s->method);
2463         }
2464
2465 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2466         {
2467         int conn= -1;
2468         int ret=1;
2469
2470         if (s->method != meth)
2471                 {
2472                 if (s->handshake_func != NULL)
2473                         conn=(s->handshake_func == s->method->ssl_connect);
2474
2475                 if (s->method->version == meth->version)
2476                         s->method=meth;
2477                 else
2478                         {
2479                         s->method->ssl_free(s);
2480                         s->method=meth;
2481                         ret=s->method->ssl_new(s);
2482                         }
2483
2484                 if (conn == 1)
2485                         s->handshake_func=meth->ssl_connect;
2486                 else if (conn == 0)
2487                         s->handshake_func=meth->ssl_accept;
2488                 }
2489         return(ret);
2490         }
2491
2492 int SSL_get_error(const SSL *s,int i)
2493         {
2494         int reason;
2495         unsigned long l;
2496         BIO *bio;
2497
2498         if (i > 0) return(SSL_ERROR_NONE);
2499
2500         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2501          * etc, where we do encode the error */
2502         if ((l=ERR_peek_error()) != 0)
2503                 {
2504                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2505                         return(SSL_ERROR_SYSCALL);
2506                 else
2507                         return(SSL_ERROR_SSL);
2508                 }
2509
2510         if ((i < 0) && SSL_want_read(s))
2511                 {
2512                 bio=SSL_get_rbio(s);
2513                 if (BIO_should_read(bio))
2514                         return(SSL_ERROR_WANT_READ);
2515                 else if (BIO_should_write(bio))
2516                         /* This one doesn't make too much sense ... We never try
2517                          * to write to the rbio, and an application program where
2518                          * rbio and wbio are separate couldn't even know what it
2519                          * should wait for.
2520                          * However if we ever set s->rwstate incorrectly
2521                          * (so that we have SSL_want_read(s) instead of
2522                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2523                          * this test works around that bug; so it might be safer
2524                          * to keep it. */
2525                         return(SSL_ERROR_WANT_WRITE);
2526                 else if (BIO_should_io_special(bio))
2527                         {
2528                         reason=BIO_get_retry_reason(bio);
2529                         if (reason == BIO_RR_CONNECT)
2530                                 return(SSL_ERROR_WANT_CONNECT);
2531                         else if (reason == BIO_RR_ACCEPT)
2532                                 return(SSL_ERROR_WANT_ACCEPT);
2533                         else
2534                                 return(SSL_ERROR_SYSCALL); /* unknown */
2535                         }
2536                 }
2537
2538         if ((i < 0) && SSL_want_write(s))
2539                 {
2540                 bio=SSL_get_wbio(s);
2541                 if (BIO_should_write(bio))
2542                         return(SSL_ERROR_WANT_WRITE);
2543                 else if (BIO_should_read(bio))
2544                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2545                         return(SSL_ERROR_WANT_READ);
2546                 else if (BIO_should_io_special(bio))
2547                         {
2548                         reason=BIO_get_retry_reason(bio);
2549                         if (reason == BIO_RR_CONNECT)
2550                                 return(SSL_ERROR_WANT_CONNECT);
2551                         else if (reason == BIO_RR_ACCEPT)
2552                                 return(SSL_ERROR_WANT_ACCEPT);
2553                         else
2554                                 return(SSL_ERROR_SYSCALL);
2555                         }
2556                 }
2557         if ((i < 0) && SSL_want_x509_lookup(s))
2558                 {
2559                 return(SSL_ERROR_WANT_X509_LOOKUP);
2560                 }
2561
2562         if (i == 0)
2563                 {
2564                 if (s->version == SSL2_VERSION)
2565                         {
2566                         /* assume it is the socket being closed */
2567                         return(SSL_ERROR_ZERO_RETURN);
2568                         }
2569                 else
2570                         {
2571                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2572                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2573                                 return(SSL_ERROR_ZERO_RETURN);
2574                         }
2575                 }
2576         return(SSL_ERROR_SYSCALL);
2577         }
2578
2579 int SSL_do_handshake(SSL *s)
2580         {
2581         int ret=1;
2582
2583         if (s->handshake_func == NULL)
2584                 {
2585                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2586                 return(-1);
2587                 }
2588
2589         s->method->ssl_renegotiate_check(s);
2590
2591         if (SSL_in_init(s) || SSL_in_before(s))
2592                 {
2593                 ret=s->handshake_func(s);
2594                 }
2595         return(ret);
2596         }
2597
2598 /* For the next 2 functions, SSL_clear() sets shutdown and so
2599  * one of these calls will reset it */
2600 void SSL_set_accept_state(SSL *s)
2601         {
2602         s->server=1;
2603         s->shutdown=0;
2604         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2605         s->handshake_func=s->method->ssl_accept;
2606         /* clear the current cipher */
2607         ssl_clear_cipher_ctx(s);
2608         ssl_clear_hash_ctx(&s->read_hash);
2609         ssl_clear_hash_ctx(&s->write_hash);
2610         }
2611
2612 void SSL_set_connect_state(SSL *s)
2613         {
2614         s->server=0;
2615         s->shutdown=0;
2616         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2617         s->handshake_func=s->method->ssl_connect;
2618         /* clear the current cipher */
2619         ssl_clear_cipher_ctx(s);
2620         ssl_clear_hash_ctx(&s->read_hash);
2621         ssl_clear_hash_ctx(&s->write_hash);
2622         }
2623
2624 int ssl_undefined_function(SSL *s)
2625         {
2626         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2627         return(0);
2628         }
2629
2630 int ssl_undefined_void_function(void)
2631         {
2632         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2633         return(0);
2634         }
2635
2636 int ssl_undefined_const_function(const SSL *s)
2637         {
2638         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2639         return(0);
2640         }
2641
2642 SSL_METHOD *ssl_bad_method(int ver)
2643         {
2644         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2645         return(NULL);
2646         }
2647
2648 const char *SSL_get_version(const SSL *s)
2649         {
2650         if (s->version == TLS1_2_VERSION)
2651                 return("TLSv1.2");
2652         else if (s->version == TLS1_1_VERSION)
2653                 return("TLSv1.1");
2654         else if (s->version == TLS1_VERSION)
2655                 return("TLSv1");
2656         else if (s->version == SSL3_VERSION)
2657                 return("SSLv3");
2658         else if (s->version == SSL2_VERSION)
2659                 return("SSLv2");
2660         else
2661                 return("unknown");
2662         }
2663
2664 SSL *SSL_dup(SSL *s)
2665         {
2666         STACK_OF(X509_NAME) *sk;
2667         X509_NAME *xn;
2668         SSL *ret;
2669         int i;
2670
2671         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2672             return(NULL);
2673
2674         ret->version = s->version;
2675         ret->type = s->type;
2676         ret->method = s->method;
2677
2678         if (s->session != NULL)
2679                 {
2680                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2681                 SSL_copy_session_id(ret,s);
2682                 }
2683         else
2684                 {
2685                 /* No session has been established yet, so we have to expect
2686                  * that s->cert or ret->cert will be changed later --
2687                  * they should not both point to the same object,
2688                  * and thus we can't use SSL_copy_session_id. */
2689
2690                 ret->method->ssl_free(ret);
2691                 ret->method = s->method;
2692                 ret->method->ssl_new(ret);
2693
2694                 if (s->cert != NULL)
2695                         {
2696                         if (ret->cert != NULL)
2697                                 {
2698                                 ssl_cert_free(ret->cert);
2699                                 }
2700                         ret->cert = ssl_cert_dup(s->cert);
2701                         if (ret->cert == NULL)
2702                                 goto err;
2703                         }
2704
2705                 SSL_set_session_id_context(ret,
2706                         s->sid_ctx, s->sid_ctx_length);
2707                 }
2708
2709         ret->options=s->options;
2710         ret->mode=s->mode;
2711         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2712         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2713         ret->msg_callback = s->msg_callback;
2714         ret->msg_callback_arg = s->msg_callback_arg;
2715         SSL_set_verify(ret,SSL_get_verify_mode(s),
2716                 SSL_get_verify_callback(s));
2717         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2718         ret->generate_session_id = s->generate_session_id;
2719
2720         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2721
2722         ret->debug=s->debug;
2723
2724         /* copy app data, a little dangerous perhaps */
2725         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2726                 goto err;
2727
2728         /* setup rbio, and wbio */
2729         if (s->rbio != NULL)
2730                 {
2731                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2732                         goto err;
2733                 }
2734         if (s->wbio != NULL)
2735                 {
2736                 if (s->wbio != s->rbio)
2737                         {
2738                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2739                                 goto err;
2740                         }
2741                 else
2742                         ret->wbio=ret->rbio;
2743                 }
2744         ret->rwstate = s->rwstate;
2745         ret->in_handshake = s->in_handshake;
2746         ret->handshake_func = s->handshake_func;
2747         ret->server = s->server;
2748         ret->renegotiate = s->renegotiate;
2749         ret->new_session = s->new_session;
2750         ret->quiet_shutdown = s->quiet_shutdown;
2751         ret->shutdown=s->shutdown;
2752         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2753         ret->rstate=s->rstate;
2754         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2755         ret->hit=s->hit;
2756
2757         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2758
2759         /* dup the cipher_list and cipher_list_by_id stacks */
2760         if (s->cipher_list != NULL)
2761                 {
2762                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2763                         goto err;
2764                 }
2765         if (s->cipher_list_by_id != NULL)
2766                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2767                         == NULL)
2768                         goto err;
2769
2770         /* Dup the client_CA list */
2771         if (s->client_CA != NULL)
2772                 {
2773                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2774                 ret->client_CA=sk;
2775                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2776                         {
2777                         xn=sk_X509_NAME_value(sk,i);
2778                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2779                                 {
2780                                 X509_NAME_free(xn);
2781                                 goto err;
2782                                 }
2783                         }
2784                 }
2785
2786         if (0)
2787                 {
2788 err:
2789                 if (ret != NULL) SSL_free(ret);
2790                 ret=NULL;
2791                 }
2792         return(ret);
2793         }
2794
2795 void ssl_clear_cipher_ctx(SSL *s)
2796         {
2797         if (s->enc_read_ctx != NULL)
2798                 {
2799                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2800                 OPENSSL_free(s->enc_read_ctx);
2801                 s->enc_read_ctx=NULL;
2802                 }
2803         if (s->enc_write_ctx != NULL)
2804                 {
2805                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2806                 OPENSSL_free(s->enc_write_ctx);
2807                 s->enc_write_ctx=NULL;
2808                 }
2809 #ifndef OPENSSL_NO_COMP
2810         if (s->expand != NULL)
2811                 {
2812                 COMP_CTX_free(s->expand);
2813                 s->expand=NULL;
2814                 }
2815         if (s->compress != NULL)
2816                 {
2817                 COMP_CTX_free(s->compress);
2818                 s->compress=NULL;
2819                 }
2820 #endif
2821         }
2822
2823 /* Fix this function so that it takes an optional type parameter */
2824 X509 *SSL_get_certificate(const SSL *s)
2825         {
2826         if (s->cert != NULL)
2827                 return(s->cert->key->x509);
2828         else
2829                 return(NULL);
2830         }
2831
2832 /* Fix this function so that it takes an optional type parameter */
2833 EVP_PKEY *SSL_get_privatekey(SSL *s)
2834         {
2835         if (s->cert != NULL)
2836                 return(s->cert->key->privatekey);
2837         else
2838                 return(NULL);
2839         }
2840
2841 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2842         {
2843         if ((s->session != NULL) && (s->session->cipher != NULL))
2844                 return(s->session->cipher);
2845         return(NULL);
2846         }
2847 #ifdef OPENSSL_NO_COMP
2848 const void *SSL_get_current_compression(SSL *s)
2849         {
2850         return NULL;
2851         }
2852 const void *SSL_get_current_expansion(SSL *s)
2853         {
2854         return NULL;
2855         }
2856 #else
2857
2858 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2859         {
2860         if (s->compress != NULL)
2861                 return(s->compress->meth);
2862         return(NULL);
2863         }
2864
2865 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2866         {
2867         if (s->expand != NULL)
2868                 return(s->expand->meth);
2869         return(NULL);
2870         }
2871 #endif
2872
2873 int ssl_init_wbio_buffer(SSL *s,int push)
2874         {
2875         BIO *bbio;
2876
2877         if (s->bbio == NULL)
2878                 {
2879                 bbio=BIO_new(BIO_f_buffer());
2880                 if (bbio == NULL) return(0);
2881                 s->bbio=bbio;
2882                 }
2883         else
2884                 {
2885                 bbio=s->bbio;
2886                 if (s->bbio == s->wbio)
2887                         s->wbio=BIO_pop(s->wbio);
2888                 }
2889         (void)BIO_reset(bbio);
2890 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2891         if (!BIO_set_read_buffer_size(bbio,1))
2892                 {
2893                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2894                 return(0);
2895                 }
2896         if (push)
2897                 {
2898                 if (s->wbio != bbio)
2899                         s->wbio=BIO_push(bbio,s->wbio);
2900                 }
2901         else
2902                 {
2903                 if (s->wbio == bbio)
2904                         s->wbio=BIO_pop(bbio);
2905                 }
2906         return(1);
2907         }
2908
2909 void ssl_free_wbio_buffer(SSL *s)
2910         {
2911         if (s->bbio == NULL) return;
2912
2913         if (s->bbio == s->wbio)
2914                 {
2915                 /* remove buffering */
2916                 s->wbio=BIO_pop(s->wbio);
2917 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2918                 assert(s->wbio != NULL);
2919 #endif
2920         }
2921         BIO_free(s->bbio);
2922         s->bbio=NULL;
2923         }
2924
2925 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2926         {
2927         ctx->quiet_shutdown=mode;
2928         }
2929
2930 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2931         {
2932         return(ctx->quiet_shutdown);
2933         }
2934
2935 void SSL_set_quiet_shutdown(SSL *s,int mode)
2936         {
2937         s->quiet_shutdown=mode;
2938         }
2939
2940 int SSL_get_quiet_shutdown(const SSL *s)
2941         {
2942         return(s->quiet_shutdown);
2943         }
2944
2945 void SSL_set_shutdown(SSL *s,int mode)
2946         {
2947         s->shutdown=mode;
2948         }
2949
2950 int SSL_get_shutdown(const SSL *s)
2951         {
2952         return(s->shutdown);
2953         }
2954
2955 int SSL_version(const SSL *s)
2956         {
2957         return(s->version);
2958         }
2959
2960 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2961         {
2962         return(ssl->ctx);
2963         }
2964
2965 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2966         {
2967         CERT *ocert = ssl->cert;
2968         if (ssl->ctx == ctx)
2969                 return ssl->ctx;
2970 #ifndef OPENSSL_NO_TLSEXT
2971         if (ctx == NULL)
2972                 ctx = ssl->initial_ctx;
2973 #endif
2974         ssl->cert = ssl_cert_dup(ctx->cert);
2975         if (ocert != NULL)
2976                 {
2977                 int i;
2978                 /* Copy negotiated digests from original */
2979                 for (i = 0; i < SSL_PKEY_NUM; i++)
2980                         {
2981                         CERT_PKEY *cpk = ocert->pkeys + i;
2982                         CERT_PKEY *rpk = ssl->cert->pkeys + i;
2983                         rpk->digest = cpk->digest;
2984                         }
2985                 ssl_cert_free(ocert);
2986                 }
2987
2988         /*
2989          * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
2990          * so setter APIs must prevent invalid lengths from entering the system.
2991          */
2992         OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx));
2993
2994         /*
2995          * If the session ID context matches that of the parent SSL_CTX,
2996          * inherit it from the new SSL_CTX as well. If however the context does
2997          * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
2998          * leave it unchanged.
2999          */
3000         if ((ssl->ctx != NULL) &&
3001                 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
3002                 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0))
3003                 {
3004                 ssl->sid_ctx_length = ctx->sid_ctx_length;
3005                 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
3006                 }
3007
3008         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3009         if (ssl->ctx != NULL)
3010                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3011         ssl->ctx = ctx;
3012
3013         return(ssl->ctx);
3014         }
3015
3016 #ifndef OPENSSL_NO_STDIO
3017 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3018         {
3019         return(X509_STORE_set_default_paths(ctx->cert_store));
3020         }
3021
3022 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3023                 const char *CApath)
3024         {
3025         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3026         }
3027 #endif
3028
3029 void SSL_set_info_callback(SSL *ssl,
3030         void (*cb)(const SSL *ssl,int type,int val))
3031         {
3032         ssl->info_callback=cb;
3033         }
3034
3035 /* One compiler (Diab DCC) doesn't like argument names in returned
3036    function pointer.  */
3037 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3038         {
3039         return ssl->info_callback;
3040         }
3041
3042 int SSL_state(const SSL *ssl)
3043         {
3044         return(ssl->state);
3045         }
3046
3047 void SSL_set_state(SSL *ssl, int state)
3048         {
3049         ssl->state = state;
3050         }
3051
3052 void SSL_set_verify_result(SSL *ssl,long arg)
3053         {
3054         ssl->verify_result=arg;
3055         }
3056
3057 long SSL_get_verify_result(const SSL *ssl)
3058         {
3059         return(ssl->verify_result);
3060         }
3061
3062 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3063                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3064         {
3065         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3066                                 new_func, dup_func, free_func);
3067         }
3068
3069 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3070         {
3071         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3072         }
3073
3074 void *SSL_get_ex_data(const SSL *s,int idx)
3075         {
3076         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3077         }
3078
3079 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3080                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3081         {
3082         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3083                                 new_func, dup_func, free_func);
3084         }
3085
3086 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3087         {
3088         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3089         }
3090
3091 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3092         {
3093         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3094         }
3095
3096 int ssl_ok(SSL *s)
3097         {
3098         return(1);
3099         }
3100
3101 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3102         {
3103         return(ctx->cert_store);
3104         }
3105
3106 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3107         {
3108         if (ctx->cert_store != NULL)
3109                 X509_STORE_free(ctx->cert_store);
3110         ctx->cert_store=store;
3111         }
3112
3113 int SSL_want(const SSL *s)
3114         {
3115         return(s->rwstate);
3116         }
3117
3118 /*!
3119  * \brief Set the callback for generating temporary RSA keys.
3120  * \param ctx the SSL context.
3121  * \param cb the callback
3122  */
3123
3124 #ifndef OPENSSL_NO_RSA
3125 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3126                                                           int is_export,
3127                                                           int keylength))
3128     {
3129     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3130     }
3131
3132 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3133                                                   int is_export,
3134                                                   int keylength))
3135     {
3136     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3137     }
3138 #endif
3139
3140 #ifdef DOXYGEN
3141 /*!
3142  * \brief The RSA temporary key callback function.
3143  * \param ssl the SSL session.
3144  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3145  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3146  * of the required key in bits.
3147  * \return the temporary RSA key.
3148  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3149  */
3150
3151 RSA *cb(SSL *ssl,int is_export,int keylength)
3152     {}
3153 #endif
3154
3155 /*!
3156  * \brief Set the callback for generating temporary DH keys.
3157  * \param ctx the SSL context.
3158  * \param dh the callback
3159  */
3160
3161 #ifndef OPENSSL_NO_DH
3162 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3163                                                         int keylength))
3164         {
3165         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3166         }
3167
3168 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3169                                                 int keylength))
3170         {
3171         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3172         }
3173 #endif
3174
3175 #ifndef OPENSSL_NO_ECDH
3176 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3177                                                                 int keylength))
3178         {
3179         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3180         }
3181
3182 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3183                                                         int keylength))
3184         {
3185         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3186         }
3187 #endif
3188
3189 #ifndef OPENSSL_NO_PSK
3190 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3191         {
3192         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3193                 {
3194                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3195                 return 0;
3196                 }
3197         if (ctx->psk_identity_hint != NULL)
3198                 OPENSSL_free(ctx->psk_identity_hint);
3199         if (identity_hint != NULL)
3200                 {
3201                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3202                 if (ctx->psk_identity_hint == NULL)
3203                         return 0;
3204                 }
3205         else
3206                 ctx->psk_identity_hint = NULL;
3207         return 1;
3208         }
3209
3210 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3211         {
3212         if (s == NULL)
3213                 return 0;
3214
3215         if (s->session == NULL)
3216                 return 1; /* session not created yet, ignored */
3217
3218         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3219                 {
3220                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3221                 return 0;
3222                 }
3223         if (s->session->psk_identity_hint != NULL)
3224                 OPENSSL_free(s->session->psk_identity_hint);
3225         if (identity_hint != NULL)
3226                 {
3227                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3228                 if (s->session->psk_identity_hint == NULL)
3229                         return 0;
3230                 }
3231         else
3232                 s->session->psk_identity_hint = NULL;
3233         return 1;
3234         }
3235
3236 const char *SSL_get_psk_identity_hint(const SSL *s)
3237         {
3238         if (s == NULL || s->session == NULL)
3239                 return NULL;
3240         return(s->session->psk_identity_hint);
3241         }
3242
3243 const char *SSL_get_psk_identity(const SSL *s)
3244         {
3245         if (s == NULL || s->session == NULL)
3246                 return NULL;
3247         return(s->session->psk_identity);
3248         }
3249
3250 void SSL_set_psk_client_callback(SSL *s,
3251     unsigned int (*cb)(SSL *ssl, const char *hint,
3252                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3253                        unsigned int max_psk_len))
3254         {
3255         s->psk_client_callback = cb;
3256         }
3257
3258 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3259     unsigned int (*cb)(SSL *ssl, const char *hint,
3260                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3261                        unsigned int max_psk_len))
3262         {
3263         ctx->psk_client_callback = cb;
3264         }
3265
3266 void SSL_set_psk_server_callback(SSL *s,
3267     unsigned int (*cb)(SSL *ssl, const char *identity,
3268                        unsigned char *psk, unsigned int max_psk_len))
3269         {
3270         s->psk_server_callback = cb;
3271         }
3272
3273 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3274     unsigned int (*cb)(SSL *ssl, const char *identity,
3275                        unsigned char *psk, unsigned int max_psk_len))
3276         {
3277         ctx->psk_server_callback = cb;
3278         }
3279 #endif
3280
3281 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))
3282         {
3283         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3284         }
3285 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))
3286         {
3287         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3288         }
3289
3290 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3291  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3292  * any. If EVP_MD pointer is passed, initializes ctx with this md
3293  * Returns newly allocated ctx;
3294  */
3295
3296 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3297 {
3298         ssl_clear_hash_ctx(hash);
3299         *hash = EVP_MD_CTX_create();
3300         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3301         return *hash;
3302 }
3303 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3304 {
3305
3306         if (*hash) EVP_MD_CTX_destroy(*hash);
3307         *hash=NULL;
3308 }
3309
3310 void SSL_set_debug(SSL *s, int debug)
3311         {
3312         s->debug = debug;
3313         }
3314
3315 int SSL_cache_hit(SSL *s)
3316         {
3317         return s->hit;
3318         }
3319
3320 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3321 #include "../crypto/bio/bss_file.c"
3322 #endif
3323
3324 IMPLEMENT_STACK_OF(SSL_CIPHER)
3325 IMPLEMENT_STACK_OF(SSL_COMP)
3326 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3327                                     ssl_cipher_id);