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