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, ctx->cert);
 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         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
 326 #if 0
 327         s->verify_depth=ctx->verify_depth;
 328 #endif
 329         s->sid_ctx_length=ctx->sid_ctx_length;
 330         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 331         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 332         s->verify_callback=ctx->default_verify_callback;
 333         s->generate_session_id=ctx->generate_session_id;
 334
 335         s->param = X509_VERIFY_PARAM_new();
 336         if (!s->param)
 337                 goto err;
 338         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 339 #if 0
 340         s->purpose = ctx->purpose;
 341         s->trust = ctx->trust;
 342 #endif
 343         s->quiet_shutdown=ctx->quiet_shutdown;
 344         s->max_send_fragment = ctx->max_send_fragment;
 345
 346         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 347         s->ctx=ctx;
 348 #ifndef OPENSSL_NO_TLSEXT
 349         s->tlsext_debug_cb = 0;
 350         s->tlsext_debug_arg = NULL;
 351         s->tlsext_ticket_expected = 0;
 352         s->tlsext_status_type = -1;
 353         s->tlsext_status_expected = 0;
 354         s->tlsext_ocsp_ids = NULL;
 355         s->tlsext_ocsp_exts = NULL;
 356         s->tlsext_ocsp_resp = NULL;
 357         s->tlsext_ocsp_resplen = -1;
 358         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 359         s->initial_ctx=ctx;
 360 #ifndef OPENSSL_NO_EC
 361         if (ctx->tlsext_ecpointformatlist)
 362                 {
 363                 s->tlsext_ecpointformatlist =
 364                         BUF_memdup(ctx->tlsext_ecpointformatlist,
 365                                         ctx->tlsext_ecpointformatlist_length);
 366                 if (!s->tlsext_ecpointformatlist)
 367                         goto err;
 368                 s->tlsext_ecpointformatlist_length =
 369                                         ctx->tlsext_ecpointformatlist_length;
 370                 }
 371         if (ctx->tlsext_ellipticcurvelist)
 372                 {
 373                 s->tlsext_ellipticcurvelist =
 374                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
 375                                         ctx->tlsext_ellipticcurvelist_length);
 376                 if (!s->tlsext_ellipticcurvelist)
 377                         goto err;
 378                 s->tlsext_ellipticcurvelist_length =
 379                                         ctx->tlsext_ellipticcurvelist_length;
 380                 }
 381 #endif
 382 # ifndef OPENSSL_NO_NEXTPROTONEG
 383         s->next_proto_negotiated = NULL;
 384 # endif
 385 #endif
 386
 387         s->verify_result=X509_V_OK;
 388
 389         s->method=ctx->method;
 390
 391         if (!s->method->ssl_new(s))
 392                 goto err;
 393
 394         s->references=1;
 395         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 396
 397         SSL_clear(s);
 398
 399         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 400
 401 #ifndef OPENSSL_NO_PSK
 402         s->psk_client_callback=ctx->psk_client_callback;
 403         s->psk_server_callback=ctx->psk_server_callback;
 404 #endif
 405
 406         return(s);
 407 err:
 408         if (s != NULL)
 409                 {
 410                 if (s->cert != NULL)
 411                         ssl_cert_free(s->cert);
 412                 if (s->ctx != NULL)
 413                         SSL_CTX_free(s->ctx); /* decrement reference count */
 414                 OPENSSL_free(s);
 415                 }
 416         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 417         return(NULL);
 418         }
 419
 420 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 421                                    unsigned int sid_ctx_len)
 422     {
 423     if(sid_ctx_len > sizeof ctx->sid_ctx)
 424         {
 425         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 426         return 0;
 427         }
 428     ctx->sid_ctx_length=sid_ctx_len;
 429     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 430
 431     return 1;
 432     }
 433
 434 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 435                                unsigned int sid_ctx_len)
 436     {
 437     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 438         {
 439         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 440         return 0;
 441         }
 442     ssl->sid_ctx_length=sid_ctx_len;
 443     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 444
 445     return 1;
 446     }
 447
 448 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 449         {
 450         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 451         ctx->generate_session_id = cb;
 452         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 453         return 1;
 454         }
 455
 456 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 457         {
 458         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 459         ssl->generate_session_id = cb;
 460         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 461         return 1;
 462         }
 463
 464 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 465                                 unsigned int id_len)
 466         {
 467         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 468          * we can "construct" a session to give us the desired check - ie. to
 469          * find if there's a session in the hash table that would conflict with
 470          * any new session built out of this id/id_len and the ssl_version in
 471          * use by this SSL. */
 472         SSL_SESSION r, *p;
 473
 474         if(id_len > sizeof r.session_id)
 475                 return 0;
 476
 477         r.ssl_version = ssl->version;
 478         r.session_id_length = id_len;
 479         memcpy(r.session_id, id, id_len);
 480         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 481          * callback is calling us to check the uniqueness of a shorter ID, it
 482          * must be compared as a padded-out ID because that is what it will be
 483          * converted to when the callback has finished choosing it. */
 484         if((r.ssl_version == SSL2_VERSION) &&
 485                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 486                 {
 487                 memset(r.session_id + id_len, 0,
 488                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 489                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 490                 }
 491
 492         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 493         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 494         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 495         return (p != NULL);
 496         }
 497
 498 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 499         {
 500         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 501         }
 502
 503 int SSL_set_purpose(SSL *s, int purpose)
 504         {
 505         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 506         }
 507
 508 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 509         {
 510         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 511         }
 512
 513 int SSL_set_trust(SSL *s, int trust)
 514         {
 515         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 516         }
 517
 518 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 519         {
 520         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 521         }
 522
 523 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 524         {
 525         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 526         }
 527
 528 void SSL_certs_clear(SSL *s)
 529         {
 530         ssl_cert_clear_certs(s->cert);
 531         }
 532
 533 void SSL_free(SSL *s)
 534         {
 535         int i;
 536
 537         if(s == NULL)
 538             return;
 539
 540         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 541 #ifdef REF_PRINT
 542         REF_PRINT("SSL",s);
 543 #endif
 544         if (i > 0) return;
 545 #ifdef REF_CHECK
 546         if (i < 0)
 547                 {
 548                 fprintf(stderr,"SSL_free, bad reference count\n");
 549                 abort(); /* ok */
 550                 }
 551 #endif
 552
 553         if (s->param)
 554                 X509_VERIFY_PARAM_free(s->param);
 555
 556         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 557
 558         if (s->bbio != NULL)
 559                 {
 560                 /* If the buffering BIO is in place, pop it off */
 561                 if (s->bbio == s->wbio)
 562                         {
 563                         s->wbio=BIO_pop(s->wbio);
 564                         }
 565                 BIO_free(s->bbio);
 566                 s->bbio=NULL;
 567                 }
 568         if (s->rbio != NULL)
 569                 BIO_free_all(s->rbio);
 570         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 571                 BIO_free_all(s->wbio);
 572
 573         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 574
 575         /* add extra stuff */
 576         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 577         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 578
 579         /* Make the next call work :-) */
 580         if (s->session != NULL)
 581                 {
 582                 ssl_clear_bad_session(s);
 583                 SSL_SESSION_free(s->session);
 584                 }
 585
 586         ssl_clear_cipher_ctx(s);
 587         ssl_clear_hash_ctx(&s->read_hash);
 588         ssl_clear_hash_ctx(&s->write_hash);
 589
 590         if (s->cert != NULL) ssl_cert_free(s->cert);
 591         /* Free up if allocated */
 592
 593 #ifndef OPENSSL_NO_TLSEXT
 594         if (s->tlsext_hostname)
 595                 OPENSSL_free(s->tlsext_hostname);
 596         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 597 #ifndef OPENSSL_NO_EC
 598         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 599         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 600 #endif /* OPENSSL_NO_EC */
 601         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 602         if (s->tlsext_ocsp_exts)
 603                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 604                                                 X509_EXTENSION_free);
 605         if (s->tlsext_ocsp_ids)
 606                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 607         if (s->tlsext_ocsp_resp)
 608                 OPENSSL_free(s->tlsext_ocsp_resp);
 609 #endif
 610
 611         if (s->client_CA != NULL)
 612                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 613
 614         if (s->method != NULL) s->method->ssl_free(s);
 615
 616         if (s->ctx) SSL_CTX_free(s->ctx);
 617
 618 #ifndef OPENSSL_NO_KRB5
 619         if (s->kssl_ctx != NULL)
 620                 kssl_ctx_free(s->kssl_ctx);
 621 #endif  /* OPENSSL_NO_KRB5 */
 622
 623 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 624         if (s->next_proto_negotiated)
 625                 OPENSSL_free(s->next_proto_negotiated);
 626 #endif
 627
 628         if (s->srtp_profiles)
 629             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 630
 631         OPENSSL_free(s);
 632         }
 633
 634 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 635         {
 636         /* If the output buffering BIO is still in place, remove it
 637          */
 638         if (s->bbio != NULL)
 639                 {
 640                 if (s->wbio == s->bbio)
 641                         {
 642                         s->wbio=s->wbio->next_bio;
 643                         s->bbio->next_bio=NULL;
 644                         }
 645                 }
 646         if ((s->rbio != NULL) && (s->rbio != rbio))
 647                 BIO_free_all(s->rbio);
 648         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 649                 BIO_free_all(s->wbio);
 650         s->rbio=rbio;
 651         s->wbio=wbio;
 652         }
 653
 654 BIO *SSL_get_rbio(const SSL *s)
 655         { return(s->rbio); }
 656
 657 BIO *SSL_get_wbio(const SSL *s)
 658         { return(s->wbio); }
 659
 660 int SSL_get_fd(const SSL *s)
 661         {
 662         return(SSL_get_rfd(s));
 663         }
 664
 665 int SSL_get_rfd(const SSL *s)
 666         {
 667         int ret= -1;
 668         BIO *b,*r;
 669
 670         b=SSL_get_rbio(s);
 671         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 672         if (r != NULL)
 673                 BIO_get_fd(r,&ret);
 674         return(ret);
 675         }
 676
 677 int SSL_get_wfd(const SSL *s)
 678         {
 679         int ret= -1;
 680         BIO *b,*r;
 681
 682         b=SSL_get_wbio(s);
 683         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 684         if (r != NULL)
 685                 BIO_get_fd(r,&ret);
 686         return(ret);
 687         }
 688
 689 #ifndef OPENSSL_NO_SOCK
 690 int SSL_set_fd(SSL *s,int fd)
 691         {
 692         int ret=0;
 693         BIO *bio=NULL;
 694
 695         bio=BIO_new(BIO_s_socket());
 696
 697         if (bio == NULL)
 698                 {
 699                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 700                 goto err;
 701                 }
 702         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 703         SSL_set_bio(s,bio,bio);
 704         ret=1;
 705 err:
 706         return(ret);
 707         }
 708
 709 int SSL_set_wfd(SSL *s,int fd)
 710         {
 711         int ret=0;
 712         BIO *bio=NULL;
 713
 714         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 715                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 716                 {
 717                 bio=BIO_new(BIO_s_socket());
 718
 719                 if (bio == NULL)
 720                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 721                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 722                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 723                 }
 724         else
 725                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 726         ret=1;
 727 err:
 728         return(ret);
 729         }
 730
 731 int SSL_set_rfd(SSL *s,int fd)
 732         {
 733         int ret=0;
 734         BIO *bio=NULL;
 735
 736         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 737                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 738                 {
 739                 bio=BIO_new(BIO_s_socket());
 740
 741                 if (bio == NULL)
 742                         {
 743                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 744                         goto err;
 745                         }
 746                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 747                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 748                 }
 749         else
 750                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 751         ret=1;
 752 err:
 753         return(ret);
 754         }
 755 #endif
 756
 757
 758 /* return length of latest Finished message we sent, copy to 'buf' */
 759 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 760         {
 761         size_t ret = 0;
 762
 763         if (s->s3 != NULL)
 764                 {
 765                 ret = s->s3->tmp.finish_md_len;
 766                 if (count > ret)
 767                         count = ret;
 768                 memcpy(buf, s->s3->tmp.finish_md, count);
 769                 }
 770         return ret;
 771         }
 772
 773 /* return length of latest Finished message we expected, copy to 'buf' */
 774 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 775         {
 776         size_t ret = 0;
 777
 778         if (s->s3 != NULL)
 779                 {
 780                 ret = s->s3->tmp.peer_finish_md_len;
 781                 if (count > ret)
 782                         count = ret;
 783                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 784                 }
 785         return ret;
 786         }
 787
 788
 789 int SSL_get_verify_mode(const SSL *s)
 790         {
 791         return(s->verify_mode);
 792         }
 793
 794 int SSL_get_verify_depth(const SSL *s)
 795         {
 796         return X509_VERIFY_PARAM_get_depth(s->param);
 797         }
 798
 799 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 800         {
 801         return(s->verify_callback);
 802         }
 803
 804 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 805         {
 806         return(ctx->verify_mode);
 807         }
 808
 809 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 810         {
 811         return X509_VERIFY_PARAM_get_depth(ctx->param);
 812         }
 813
 814 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 815         {
 816         return(ctx->default_verify_callback);
 817         }
 818
 819 void SSL_set_verify(SSL *s,int mode,
 820                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 821         {
 822         s->verify_mode=mode;
 823         if (callback != NULL)
 824                 s->verify_callback=callback;
 825         }
 826
 827 void SSL_set_verify_depth(SSL *s,int depth)
 828         {
 829         X509_VERIFY_PARAM_set_depth(s->param, depth);
 830         }
 831
 832 void SSL_set_read_ahead(SSL *s,int yes)
 833         {
 834         s->read_ahead=yes;
 835         }
 836
 837 int SSL_get_read_ahead(const SSL *s)
 838         {
 839         return(s->read_ahead);
 840         }
 841
 842 int SSL_pending(const SSL *s)
 843         {
 844         /* SSL_pending cannot work properly if read-ahead is enabled
 845          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 846          * and it is impossible to fix since SSL_pending cannot report
 847          * errors that may be observed while scanning the new data.
 848          * (Note that SSL_pending() is often used as a boolean value,
 849          * so we'd better not return -1.)
 850          */
 851         return(s->method->ssl_pending(s));
 852         }
 853
 854 X509 *SSL_get_peer_certificate(const SSL *s)
 855         {
 856         X509 *r;
 857
 858         if ((s == NULL) || (s->session == NULL))
 859                 r=NULL;
 860         else
 861                 r=s->session->peer;
 862
 863         if (r == NULL) return(r);
 864
 865         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 866
 867         return(r);
 868         }
 869
 870 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 871         {
 872         STACK_OF(X509) *r;
 873
 874         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 875                 r=NULL;
 876         else
 877                 r=s->session->sess_cert->cert_chain;
 878
 879         /* If we are a client, cert_chain includes the peer's own
 880          * certificate; if we are a server, it does not. */
 881
 882         return(r);
 883         }
 884
 885 /* Now in theory, since the calling process own 't' it should be safe to
 886  * modify.  We need to be able to read f without being hassled */
 887 void SSL_copy_session_id(SSL *t,const SSL *f)
 888         {
 889         CERT *tmp;
 890
 891         /* Do we need to to SSL locking? */
 892         SSL_set_session(t,SSL_get_session(f));
 893
 894         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 895          * vice-versa */
 896         if (t->method != f->method)
 897                 {
 898                 t->method->ssl_free(t); /* cleanup current */
 899                 t->method=f->method;    /* change method */
 900                 t->method->ssl_new(t);  /* setup new */
 901                 }
 902
 903         tmp=t->cert;
 904         if (f->cert != NULL)
 905                 {
 906                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 907                 t->cert=f->cert;
 908                 }
 909         else
 910                 t->cert=NULL;
 911         if (tmp != NULL) ssl_cert_free(tmp);
 912         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 913         }
 914
 915 /* Fix this so it checks all the valid key/cert options */
 916 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 917         {
 918         if (    (ctx == NULL) ||
 919                 (ctx->cert == NULL) ||
 920                 (ctx->cert->key->x509 == NULL))
 921                 {
 922                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 923                 return(0);
 924                 }
 925         if      (ctx->cert->key->privatekey == NULL)
 926                 {
 927                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 928                 return(0);
 929                 }
 930         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 931         }
 932
 933 /* Fix this function so that it takes an optional type parameter */
 934 int SSL_check_private_key(const SSL *ssl)
 935         {
 936         if (ssl == NULL)
 937                 {
 938                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 939                 return(0);
 940                 }
 941         if (ssl->cert == NULL)
 942                 {
 943                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 944                 return 0;
 945                 }
 946         if (ssl->cert->key->x509 == NULL)
 947                 {
 948                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 949                 return(0);
 950                 }
 951         if (ssl->cert->key->privatekey == NULL)
 952                 {
 953                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 954                 return(0);
 955                 }
 956         return(X509_check_private_key(ssl->cert->key->x509,
 957                 ssl->cert->key->privatekey));
 958         }
 959
 960 int SSL_accept(SSL *s)
 961         {
 962         if (s->handshake_func == 0)
 963                 /* Not properly initialized yet */
 964                 SSL_set_accept_state(s);
 965
 966         return(s->method->ssl_accept(s));
 967         }
 968
 969 int SSL_connect(SSL *s)
 970         {
 971         if (s->handshake_func == 0)
 972                 /* Not properly initialized yet */
 973                 SSL_set_connect_state(s);
 974
 975         return(s->method->ssl_connect(s));
 976         }
 977
 978 long SSL_get_default_timeout(const SSL *s)
 979         {
 980         return(s->method->get_timeout());
 981         }
 982
 983 int SSL_read(SSL *s,void *buf,int num)
 984         {
 985         if (s->handshake_func == 0)
 986                 {
 987                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 988                 return -1;
 989                 }
 990
 991         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 992                 {
 993                 s->rwstate=SSL_NOTHING;
 994                 return(0);
 995                 }
 996         return(s->method->ssl_read(s,buf,num));
 997         }
 998
 999 int SSL_peek(SSL *s,void *buf,int num)
1000         {
1001         if (s->handshake_func == 0)
1002                 {
1003                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1004                 return -1;
1005                 }
1006
1007         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1008                 {
1009                 return(0);
1010                 }
1011         return(s->method->ssl_peek(s,buf,num));
1012         }
1013
1014 int SSL_write(SSL *s,const void *buf,int num)
1015         {
1016         if (s->handshake_func == 0)
1017                 {
1018                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1019                 return -1;
1020                 }
1021
1022         if (s->shutdown & SSL_SENT_SHUTDOWN)
1023                 {
1024                 s->rwstate=SSL_NOTHING;
1025                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1026                 return(-1);
1027                 }
1028         return(s->method->ssl_write(s,buf,num));
1029         }
1030
1031 int SSL_shutdown(SSL *s)
1032         {
1033         /* Note that this function behaves differently from what one might
1034          * expect.  Return values are 0 for no success (yet),
1035          * 1 for success; but calling it once is usually not enough,
1036          * even if blocking I/O is used (see ssl3_shutdown).
1037          */
1038
1039         if (s->handshake_func == 0)
1040                 {
1041                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1042                 return -1;
1043                 }
1044
1045         if ((s != NULL) && !SSL_in_init(s))
1046                 return(s->method->ssl_shutdown(s));
1047         else
1048                 return(1);
1049         }
1050
1051 int SSL_renegotiate(SSL *s)
1052         {
1053         if (s->renegotiate == 0)
1054                 s->renegotiate=1;
1055
1056         s->new_session=1;
1057
1058         return(s->method->ssl_renegotiate(s));
1059         }
1060
1061 int SSL_renegotiate_abbreviated(SSL *s)
1062         {
1063         if (s->renegotiate == 0)
1064                 s->renegotiate=1;
1065
1066         s->new_session=0;
1067
1068         return(s->method->ssl_renegotiate(s));
1069         }
1070
1071 int SSL_renegotiate_pending(SSL *s)
1072         {
1073         /* becomes true when negotiation is requested;
1074          * false again once a handshake has finished */
1075         return (s->renegotiate != 0);
1076         }
1077
1078 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1079         {
1080         long l;
1081
1082         switch (cmd)
1083                 {
1084         case SSL_CTRL_GET_READ_AHEAD:
1085                 return(s->read_ahead);
1086         case SSL_CTRL_SET_READ_AHEAD:
1087                 l=s->read_ahead;
1088                 s->read_ahead=larg;
1089                 return(l);
1090
1091         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1092                 s->msg_callback_arg = parg;
1093                 return 1;
1094
1095         case SSL_CTRL_OPTIONS:
1096                 return(s->options|=larg);
1097         case SSL_CTRL_CLEAR_OPTIONS:
1098                 return(s->options&=~larg);
1099         case SSL_CTRL_MODE:
1100                 return(s->mode|=larg);
1101         case SSL_CTRL_CLEAR_MODE:
1102                 return(s->mode &=~larg);
1103         case SSL_CTRL_GET_MAX_CERT_LIST:
1104                 return(s->max_cert_list);
1105         case SSL_CTRL_SET_MAX_CERT_LIST:
1106                 l=s->max_cert_list;
1107                 s->max_cert_list=larg;
1108                 return(l);
1109         case SSL_CTRL_SET_MTU:
1110 #ifndef OPENSSL_NO_DTLS1
1111                 if (larg < (long)dtls1_min_mtu())
1112                         return 0;
1113 #endif
1114
1115                 if (SSL_version(s) == DTLS1_VERSION ||
1116                     SSL_version(s) == DTLS1_BAD_VER)
1117                         {
1118                         s->d1->mtu = larg;
1119                         return larg;
1120                         }
1121                 return 0;
1122         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1123                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1124                         return 0;
1125                 s->max_send_fragment = larg;
1126                 return 1;
1127         case SSL_CTRL_GET_RI_SUPPORT:
1128                 if (s->s3)
1129                         return s->s3->send_connection_binding;
1130                 else return 0;
1131         case SSL_CTRL_CERT_FLAGS:
1132                 return(s->cert->cert_flags|=larg);
1133         case SSL_CTRL_CLEAR_CERT_FLAGS:
1134                 return(s->cert->cert_flags &=~larg);
1135
1136         case SSL_CTRL_GET_RAW_CIPHERLIST:
1137                 if (parg)
1138                         {
1139                         if (s->cert->ciphers_raw == NULL)
1140                                 return 0;
1141                         *(unsigned char **)parg = s->cert->ciphers_raw;
1142                         return (int)s->cert->ciphers_rawlen;
1143                         }
1144                 else
1145                         return ssl_put_cipher_by_char(s,NULL,NULL);
1146         default:
1147                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1148                 }
1149         }
1150
1151 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1152         {
1153         switch(cmd)
1154                 {
1155         case SSL_CTRL_SET_MSG_CALLBACK:
1156                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1157                 return 1;
1158
1159         default:
1160                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1161                 }
1162         }
1163
1164 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1165         {
1166         return ctx->sessions;
1167         }
1168
1169 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1170         {
1171         long l;
1172
1173         switch (cmd)
1174                 {
1175         case SSL_CTRL_GET_READ_AHEAD:
1176                 return(ctx->read_ahead);
1177         case SSL_CTRL_SET_READ_AHEAD:
1178                 l=ctx->read_ahead;
1179                 ctx->read_ahead=larg;
1180                 return(l);
1181
1182         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1183                 ctx->msg_callback_arg = parg;
1184                 return 1;
1185
1186         case SSL_CTRL_GET_MAX_CERT_LIST:
1187                 return(ctx->max_cert_list);
1188         case SSL_CTRL_SET_MAX_CERT_LIST:
1189                 l=ctx->max_cert_list;
1190                 ctx->max_cert_list=larg;
1191                 return(l);
1192
1193         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1194                 l=ctx->session_cache_size;
1195                 ctx->session_cache_size=larg;
1196                 return(l);
1197         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1198                 return(ctx->session_cache_size);
1199         case SSL_CTRL_SET_SESS_CACHE_MODE:
1200                 l=ctx->session_cache_mode;
1201                 ctx->session_cache_mode=larg;
1202                 return(l);
1203         case SSL_CTRL_GET_SESS_CACHE_MODE:
1204                 return(ctx->session_cache_mode);
1205
1206         case SSL_CTRL_SESS_NUMBER:
1207                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1208         case SSL_CTRL_SESS_CONNECT:
1209                 return(ctx->stats.sess_connect);
1210         case SSL_CTRL_SESS_CONNECT_GOOD:
1211                 return(ctx->stats.sess_connect_good);
1212         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1213                 return(ctx->stats.sess_connect_renegotiate);
1214         case SSL_CTRL_SESS_ACCEPT:
1215                 return(ctx->stats.sess_accept);
1216         case SSL_CTRL_SESS_ACCEPT_GOOD:
1217                 return(ctx->stats.sess_accept_good);
1218         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1219                 return(ctx->stats.sess_accept_renegotiate);
1220         case SSL_CTRL_SESS_HIT:
1221                 return(ctx->stats.sess_hit);
1222         case SSL_CTRL_SESS_CB_HIT:
1223                 return(ctx->stats.sess_cb_hit);
1224         case SSL_CTRL_SESS_MISSES:
1225                 return(ctx->stats.sess_miss);
1226         case SSL_CTRL_SESS_TIMEOUTS:
1227                 return(ctx->stats.sess_timeout);
1228         case SSL_CTRL_SESS_CACHE_FULL:
1229                 return(ctx->stats.sess_cache_full);
1230         case SSL_CTRL_OPTIONS:
1231                 return(ctx->options|=larg);
1232         case SSL_CTRL_CLEAR_OPTIONS:
1233                 return(ctx->options&=~larg);
1234         case SSL_CTRL_MODE:
1235                 return(ctx->mode|=larg);
1236         case SSL_CTRL_CLEAR_MODE:
1237                 return(ctx->mode&=~larg);
1238         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1239                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1240                         return 0;
1241                 ctx->max_send_fragment = larg;
1242                 return 1;
1243         case SSL_CTRL_CERT_FLAGS:
1244                 return(ctx->cert->cert_flags|=larg);
1245         case SSL_CTRL_CLEAR_CERT_FLAGS:
1246                 return(ctx->cert->cert_flags &=~larg);
1247         default:
1248                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1249                 }
1250         }
1251
1252 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1253         {
1254         switch(cmd)
1255                 {
1256         case SSL_CTRL_SET_MSG_CALLBACK:
1257                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1258                 return 1;
1259
1260         default:
1261                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1262                 }
1263         }
1264
1265 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1266         {
1267         long l;
1268
1269         l=a->id-b->id;
1270         if (l == 0L)
1271                 return(0);
1272         else
1273                 return((l > 0)?1:-1);
1274         }
1275
1276 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1277                         const SSL_CIPHER * const *bp)
1278         {
1279         long l;
1280
1281         l=(*ap)->id-(*bp)->id;
1282         if (l == 0L)
1283                 return(0);
1284         else
1285                 return((l > 0)?1:-1);
1286         }
1287
1288 /** return a STACK of the ciphers available for the SSL and in order of
1289  * preference */
1290 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1291         {
1292         if (s != NULL)
1293                 {
1294                 if (s->cipher_list != NULL)
1295                         {
1296                         return(s->cipher_list);
1297                         }
1298                 else if ((s->ctx != NULL) &&
1299                         (s->ctx->cipher_list != NULL))
1300                         {
1301                         return(s->ctx->cipher_list);
1302                         }
1303                 }
1304         return(NULL);
1305         }
1306
1307 /** return a STACK of the ciphers available for the SSL and in order of
1308  * algorithm id */
1309 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1310         {
1311         if (s != NULL)
1312                 {
1313                 if (s->cipher_list_by_id != NULL)
1314                         {
1315                         return(s->cipher_list_by_id);
1316                         }
1317                 else if ((s->ctx != NULL) &&
1318                         (s->ctx->cipher_list_by_id != NULL))
1319                         {
1320                         return(s->ctx->cipher_list_by_id);
1321                         }
1322                 }
1323         return(NULL);
1324         }
1325
1326 /** The old interface to get the same thing as SSL_get_ciphers() */
1327 const char *SSL_get_cipher_list(const SSL *s,int n)
1328         {
1329         SSL_CIPHER *c;
1330         STACK_OF(SSL_CIPHER) *sk;
1331
1332         if (s == NULL) return(NULL);
1333         sk=SSL_get_ciphers(s);
1334         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1335                 return(NULL);
1336         c=sk_SSL_CIPHER_value(sk,n);
1337         if (c == NULL) return(NULL);
1338         return(c->name);
1339         }
1340
1341 /** specify the ciphers to be used by default by the SSL_CTX */
1342 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1343         {
1344         STACK_OF(SSL_CIPHER) *sk;
1345
1346         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1347                 &ctx->cipher_list_by_id,str, ctx->cert);
1348         /* ssl_create_cipher_list may return an empty stack if it
1349          * was unable to find a cipher matching the given rule string
1350          * (for example if the rule string specifies a cipher which
1351          * has been disabled). This is not an error as far as
1352          * ssl_create_cipher_list is concerned, and hence
1353          * ctx->cipher_list and ctx->cipher_list_by_id has been
1354          * updated. */
1355         if (sk == NULL)
1356                 return 0;
1357         else if (sk_SSL_CIPHER_num(sk) == 0)
1358                 {
1359                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1360                 return 0;
1361                 }
1362         return 1;
1363         }
1364
1365 /** specify the ciphers to be used by the SSL */
1366 int SSL_set_cipher_list(SSL *s,const char *str)
1367         {
1368         STACK_OF(SSL_CIPHER) *sk;
1369
1370         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1371                 &s->cipher_list_by_id,str, s->cert);
1372         /* see comment in SSL_CTX_set_cipher_list */
1373         if (sk == NULL)
1374                 return 0;
1375         else if (sk_SSL_CIPHER_num(sk) == 0)
1376                 {
1377                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1378                 return 0;
1379                 }
1380         return 1;
1381         }
1382
1383 /* works well for SSLv2, not so good for SSLv3 */
1384 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1385         {
1386         char *p;
1387         STACK_OF(SSL_CIPHER) *sk;
1388         SSL_CIPHER *c;
1389         int i;
1390
1391         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1392                 (len < 2))
1393                 return(NULL);
1394
1395         p=buf;
1396         sk=s->session->ciphers;
1397         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1398                 {
1399                 int n;
1400
1401                 c=sk_SSL_CIPHER_value(sk,i);
1402                 n=strlen(c->name);
1403                 if (n+1 > len)
1404                         {
1405                         if (p != buf)
1406                                 --p;
1407                         *p='\0';
1408                         return buf;
1409                         }
1410                 strcpy(p,c->name);
1411                 p+=n;
1412                 *(p++)=':';
1413                 len-=n+1;
1414                 }
1415         p[-1]='\0';
1416         return(buf);
1417         }
1418
1419 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1420                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1421         {
1422         int i,j=0;
1423         SSL_CIPHER *c;
1424         CERT *ct = s->cert;
1425         unsigned char *q;
1426         /* Set disabled masks for this session */
1427         ssl_set_client_disabled(s);
1428
1429         if (sk == NULL) return(0);
1430         q=p;
1431
1432         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1433                 {
1434                 c=sk_SSL_CIPHER_value(sk,i);
1435                 /* Skip disabled ciphers */
1436                 if (c->algorithm_ssl & ct->mask_ssl ||
1437                         c->algorithm_mkey & ct->mask_k ||
1438                         c->algorithm_auth & ct->mask_a)
1439                         continue;
1440                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1441                 p+=j;
1442                 }
1443         /* If p == q, no ciphers and caller indicates an error. Otherwise
1444          * add SCSV if not renegotiating.
1445          */
1446         if (p != q && !s->renegotiate)
1447                 {
1448                 static SSL_CIPHER scsv =
1449                         {
1450                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1451                         };
1452                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1453                 p+=j;
1454 #ifdef OPENSSL_RI_DEBUG
1455                 fprintf(stderr, "SCSV sent by client\n");
1456 #endif
1457                 }
1458
1459         return(p-q);
1460         }
1461
1462 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1463                                                STACK_OF(SSL_CIPHER) **skp)
1464         {
1465         const SSL_CIPHER *c;
1466         STACK_OF(SSL_CIPHER) *sk;
1467         int i,n;
1468         if (s->s3)
1469                 s->s3->send_connection_binding = 0;
1470
1471         n=ssl_put_cipher_by_char(s,NULL,NULL);
1472         if ((num%n) != 0)
1473                 {
1474                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1475                 return(NULL);
1476                 }
1477         if ((skp == NULL) || (*skp == NULL))
1478                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1479         else
1480                 {
1481                 sk= *skp;
1482                 sk_SSL_CIPHER_zero(sk);
1483                 }
1484
1485         if (s->cert->ciphers_raw)
1486                 OPENSSL_free(s->cert->ciphers_raw);
1487         s->cert->ciphers_raw = BUF_memdup(p, num);
1488         if (s->cert->ciphers_raw == NULL)
1489                 {
1490                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1491                 goto err;
1492                 }
1493         s->cert->ciphers_rawlen = (size_t)num;
1494
1495         for (i=0; i<num; i+=n)
1496                 {
1497                 /* Check for SCSV */
1498                 if (s->s3 && (n != 3 || !p[0]) &&
1499                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1500                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1501                         {
1502                         /* SCSV fatal if renegotiating */
1503                         if (s->renegotiate)
1504                                 {
1505                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1506                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1507                                 goto err;
1508                                 }
1509                         s->s3->send_connection_binding = 1;
1510                         p += n;
1511 #ifdef OPENSSL_RI_DEBUG
1512                         fprintf(stderr, "SCSV received by server\n");
1513 #endif
1514                         continue;
1515                         }
1516
1517                 c=ssl_get_cipher_by_char(s,p);
1518                 p+=n;
1519                 if (c != NULL)
1520                         {
1521                         if (!sk_SSL_CIPHER_push(sk,c))
1522                                 {
1523                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1524                                 goto err;
1525                                 }
1526                         }
1527                 }
1528
1529         if (skp != NULL)
1530                 *skp=sk;
1531         return(sk);
1532 err:
1533         if ((skp == NULL) || (*skp == NULL))
1534                 sk_SSL_CIPHER_free(sk);
1535         return(NULL);
1536         }
1537
1538
1539 #ifndef OPENSSL_NO_TLSEXT
1540 /** return a servername extension value if provided in Client Hello, or NULL.
1541  * So far, only host_name types are defined (RFC 3546).
1542  */
1543
1544 const char *SSL_get_servername(const SSL *s, const int type)
1545         {
1546         if (type != TLSEXT_NAMETYPE_host_name)
1547                 return NULL;
1548
1549         return s->session && !s->tlsext_hostname ?
1550                 s->session->tlsext_hostname :
1551                 s->tlsext_hostname;
1552         }
1553
1554 int SSL_get_servername_type(const SSL *s)
1555         {
1556         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1557                 return TLSEXT_NAMETYPE_host_name;
1558         return -1;
1559         }
1560
1561 # ifndef OPENSSL_NO_NEXTPROTONEG
1562 /* SSL_select_next_proto implements the standard protocol selection. It is
1563  * expected that this function is called from the callback set by
1564  * SSL_CTX_set_next_proto_select_cb.
1565  *
1566  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1567  * strings. The length byte itself is not included in the length. A byte
1568  * string of length 0 is invalid. No byte string may be truncated.
1569  *
1570  * The current, but experimental algorithm for selecting the protocol is:
1571  *
1572  * 1) If the server doesn't support NPN then this is indicated to the
1573  * callback. In this case, the client application has to abort the connection
1574  * or have a default application level protocol.
1575  *
1576  * 2) If the server supports NPN, but advertises an empty list then the
1577  * client selects the first protcol in its list, but indicates via the
1578  * API that this fallback case was enacted.
1579  *
1580  * 3) Otherwise, the client finds the first protocol in the server's list
1581  * that it supports and selects this protocol. This is because it's
1582  * assumed that the server has better information about which protocol
1583  * a client should use.
1584  *
1585  * 4) If the client doesn't support any of the server's advertised
1586  * protocols, then this is treated the same as case 2.
1587  *
1588  * It returns either
1589  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1590  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1591  */
1592 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)
1593         {
1594         unsigned int i, j;
1595         const unsigned char *result;
1596         int status = OPENSSL_NPN_UNSUPPORTED;
1597
1598         /* For each protocol in server preference order, see if we support it. */
1599         for (i = 0; i < server_len; )
1600                 {
1601                 for (j = 0; j < client_len; )
1602                         {
1603                         if (server[i] == client[j] &&
1604                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1605                                 {
1606                                 /* We found a match */
1607                                 result = &server[i];
1608                                 status = OPENSSL_NPN_NEGOTIATED;
1609                                 goto found;
1610                                 }
1611                         j += client[j];
1612                         j++;
1613                         }
1614                 i += server[i];
1615                 i++;
1616                 }
1617
1618         /* There's no overlap between our protocols and the server's list. */
1619         result = client;
1620         status = OPENSSL_NPN_NO_OVERLAP;
1621
1622         found:
1623         *out = (unsigned char *) result + 1;
1624         *outlen = result[0];
1625         return status;
1626         }
1627
1628 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1629  * requested protocol for this connection and returns 0. If the client didn't
1630  * request any protocol, then *data is set to NULL.
1631  *
1632  * Note that the client can request any protocol it chooses. The value returned
1633  * from this function need not be a member of the list of supported protocols
1634  * provided by the callback.
1635  */
1636 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1637         {
1638         *data = s->next_proto_negotiated;
1639         if (!*data) {
1640                 *len = 0;
1641         } else {
1642                 *len = s->next_proto_negotiated_len;
1643         }
1644 }
1645
1646 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1647  * TLS server needs a list of supported protocols for Next Protocol
1648  * Negotiation. The returned list must be in wire format.  The list is returned
1649  * by setting |out| to point to it and |outlen| to its length. This memory will
1650  * not be modified, but one should assume that the SSL* keeps a reference to
1651  * it.
1652  *
1653  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1654  * such extension will be included in the ServerHello. */
1655 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)
1656         {
1657         ctx->next_protos_advertised_cb = cb;
1658         ctx->next_protos_advertised_cb_arg = arg;
1659         }
1660
1661 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1662  * client needs to select a protocol from the server's provided list. |out|
1663  * must be set to point to the selected protocol (which may be within |in|).
1664  * The length of the protocol name must be written into |outlen|. The server's
1665  * advertised protocols are provided in |in| and |inlen|. The callback can
1666  * assume that |in| is syntactically valid.
1667  *
1668  * The client must select a protocol. It is fatal to the connection if this
1669  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1670  */
1671 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)
1672         {
1673         ctx->next_proto_select_cb = cb;
1674         ctx->next_proto_select_cb_arg = arg;
1675         }
1676 # endif
1677 #endif
1678
1679 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1680         const char *label, size_t llen, const unsigned char *p, size_t plen,
1681         int use_context)
1682         {
1683         if (s->version < TLS1_VERSION)
1684                 return -1;
1685
1686         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1687                                                            llen, p, plen,
1688                                                            use_context);
1689         }
1690
1691 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1692         {
1693         unsigned long l;
1694
1695         l=(unsigned long)
1696                 ((unsigned int) a->session_id[0]     )|
1697                 ((unsigned int) a->session_id[1]<< 8L)|
1698                 ((unsigned long)a->session_id[2]<<16L)|
1699                 ((unsigned long)a->session_id[3]<<24L);
1700         return(l);
1701         }
1702
1703 /* NB: If this function (or indeed the hash function which uses a sort of
1704  * coarser function than this one) is changed, ensure
1705  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1706  * able to construct an SSL_SESSION that will collide with any existing session
1707  * with a matching session ID. */
1708 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1709         {
1710         if (a->ssl_version != b->ssl_version)
1711                 return(1);
1712         if (a->session_id_length != b->session_id_length)
1713                 return(1);
1714         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1715         }
1716
1717 /* These wrapper functions should remain rather than redeclaring
1718  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1719  * variable. The reason is that the functions aren't static, they're exposed via
1720  * ssl.h. */
1721 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1722 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1723
1724 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1725         {
1726         SSL_CTX *ret=NULL;
1727
1728         if (meth == NULL)
1729                 {
1730                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1731                 return(NULL);
1732                 }
1733
1734 #ifdef OPENSSL_FIPS
1735         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1736                 {
1737                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1738                 return NULL;
1739                 }
1740 #endif
1741
1742         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1743                 {
1744                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1745                 goto err;
1746                 }
1747         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1748         if (ret == NULL)
1749                 goto err;
1750
1751         memset(ret,0,sizeof(SSL_CTX));
1752
1753         ret->method=meth;
1754
1755         ret->cert_store=NULL;
1756         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1757         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1758         ret->session_cache_head=NULL;
1759         ret->session_cache_tail=NULL;
1760
1761         /* We take the system default */
1762         ret->session_timeout=meth->get_timeout();
1763
1764         ret->new_session_cb=0;
1765         ret->remove_session_cb=0;
1766         ret->get_session_cb=0;
1767         ret->generate_session_id=0;
1768
1769         memset((char *)&ret->stats,0,sizeof(ret->stats));
1770
1771         ret->references=1;
1772         ret->quiet_shutdown=0;
1773
1774 /*      ret->cipher=NULL;*/
1775 /*      ret->s2->challenge=NULL;
1776         ret->master_key=NULL;
1777         ret->key_arg=NULL;
1778         ret->s2->conn_id=NULL; */
1779
1780         ret->info_callback=NULL;
1781
1782         ret->app_verify_callback=0;
1783         ret->app_verify_arg=NULL;
1784
1785         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1786         ret->read_ahead=0;
1787         ret->msg_callback=0;
1788         ret->msg_callback_arg=NULL;
1789         ret->verify_mode=SSL_VERIFY_NONE;
1790 #if 0
1791         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1792 #endif
1793         ret->sid_ctx_length=0;
1794         ret->default_verify_callback=NULL;
1795         if ((ret->cert=ssl_cert_new()) == NULL)
1796                 goto err;
1797
1798         ret->default_passwd_callback=0;
1799         ret->default_passwd_callback_userdata=NULL;
1800         ret->client_cert_cb=0;
1801         ret->app_gen_cookie_cb=0;
1802         ret->app_verify_cookie_cb=0;
1803
1804         ret->sessions=lh_SSL_SESSION_new();
1805         if (ret->sessions == NULL) goto err;
1806         ret->cert_store=X509_STORE_new();
1807         if (ret->cert_store == NULL) goto err;
1808
1809         ssl_create_cipher_list(ret->method,
1810                 &ret->cipher_list,&ret->cipher_list_by_id,
1811                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
1812         if (ret->cipher_list == NULL
1813             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1814                 {
1815                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1816                 goto err2;
1817                 }
1818
1819         ret->param = X509_VERIFY_PARAM_new();
1820         if (!ret->param)
1821                 goto err;
1822
1823         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1824                 {
1825                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1826                 goto err2;
1827                 }
1828         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1829                 {
1830                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1831                 goto err2;
1832                 }
1833         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1834                 {
1835                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1836                 goto err2;
1837                 }
1838
1839         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1840                 goto err;
1841
1842         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1843
1844         ret->extra_certs=NULL;
1845         ret->comp_methods=SSL_COMP_get_compression_methods();
1846
1847         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1848
1849 #ifndef OPENSSL_NO_TLSEXT
1850         ret->tlsext_servername_callback = 0;
1851         ret->tlsext_servername_arg = NULL;
1852         /* Setup RFC4507 ticket keys */
1853         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1854                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1855                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1856                 ret->options |= SSL_OP_NO_TICKET;
1857
1858         ret->tlsext_status_cb = 0;
1859         ret->tlsext_status_arg = NULL;
1860
1861 # ifndef OPENSSL_NO_NEXTPROTONEG
1862         ret->next_protos_advertised_cb = 0;
1863         ret->next_proto_select_cb = 0;
1864 # endif
1865 #endif
1866 #ifndef OPENSSL_NO_PSK
1867         ret->psk_identity_hint=NULL;
1868         ret->psk_client_callback=NULL;
1869         ret->psk_server_callback=NULL;
1870 #endif
1871 #ifndef OPENSSL_NO_SRP
1872         SSL_CTX_SRP_CTX_init(ret);
1873 #endif
1874 #ifndef OPENSSL_NO_BUF_FREELISTS
1875         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1876         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1877         if (!ret->rbuf_freelist)
1878                 goto err;
1879         ret->rbuf_freelist->chunklen = 0;
1880         ret->rbuf_freelist->len = 0;
1881         ret->rbuf_freelist->head = NULL;
1882         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1883         if (!ret->wbuf_freelist)
1884                 {
1885                 OPENSSL_free(ret->rbuf_freelist);
1886                 goto err;
1887                 }
1888         ret->wbuf_freelist->chunklen = 0;
1889         ret->wbuf_freelist->len = 0;
1890         ret->wbuf_freelist->head = NULL;
1891 #endif
1892 #ifndef OPENSSL_NO_ENGINE
1893         ret->client_cert_engine = NULL;
1894 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1895 #define eng_strx(x)     #x
1896 #define eng_str(x)      eng_strx(x)
1897         /* Use specific client engine automatically... ignore errors */
1898         {
1899         ENGINE *eng;
1900         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1901         if (!eng)
1902                 {
1903                 ERR_clear_error();
1904                 ENGINE_load_builtin_engines();
1905                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1906                 }
1907         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1908                 ERR_clear_error();
1909         }
1910 #endif
1911 #endif
1912         /* Default is to connect to non-RI servers. When RI is more widely
1913          * deployed might change this.
1914          */
1915         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1916
1917         return(ret);
1918 err:
1919         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1920 err2:
1921         if (ret != NULL) SSL_CTX_free(ret);
1922         return(NULL);
1923         }
1924
1925 #if 0
1926 static void SSL_COMP_free(SSL_COMP *comp)
1927     { OPENSSL_free(comp); }
1928 #endif
1929
1930 #ifndef OPENSSL_NO_BUF_FREELISTS
1931 static void
1932 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1933         {
1934         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1935         for (ent = list->head; ent; ent = next)
1936                 {
1937                 next = ent->next;
1938                 OPENSSL_free(ent);
1939                 }
1940         OPENSSL_free(list);
1941         }
1942 #endif
1943
1944 void SSL_CTX_free(SSL_CTX *a)
1945         {
1946         int i;
1947
1948         if (a == NULL) return;
1949
1950         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1951 #ifdef REF_PRINT
1952         REF_PRINT("SSL_CTX",a);
1953 #endif
1954         if (i > 0) return;
1955 #ifdef REF_CHECK
1956         if (i < 0)
1957                 {
1958                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1959                 abort(); /* ok */
1960                 }
1961 #endif
1962
1963         if (a->param)
1964                 X509_VERIFY_PARAM_free(a->param);
1965
1966         /*
1967          * Free internal session cache. However: the remove_cb() may reference
1968          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1969          * after the sessions were flushed.
1970          * As the ex_data handling routines might also touch the session cache,
1971          * the most secure solution seems to be: empty (flush) the cache, then
1972          * free ex_data, then finally free the cache.
1973          * (See ticket [openssl.org #212].)
1974          */
1975         if (a->sessions != NULL)
1976                 SSL_CTX_flush_sessions(a,0);
1977
1978         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1979
1980         if (a->sessions != NULL)
1981                 lh_SSL_SESSION_free(a->sessions);
1982
1983         if (a->cert_store != NULL)
1984                 X509_STORE_free(a->cert_store);
1985         if (a->cipher_list != NULL)
1986                 sk_SSL_CIPHER_free(a->cipher_list);
1987         if (a->cipher_list_by_id != NULL)
1988                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1989         if (a->cert != NULL)
1990                 ssl_cert_free(a->cert);
1991         if (a->client_CA != NULL)
1992                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1993         if (a->extra_certs != NULL)
1994                 sk_X509_pop_free(a->extra_certs,X509_free);
1995 #if 0 /* This should never be done, since it removes a global database */
1996         if (a->comp_methods != NULL)
1997                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1998 #else
1999         a->comp_methods = NULL;
2000 #endif
2001
2002         if (a->srtp_profiles)
2003                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2004
2005 #ifndef OPENSSL_NO_PSK
2006         if (a->psk_identity_hint)
2007                 OPENSSL_free(a->psk_identity_hint);
2008 #endif
2009 #ifndef OPENSSL_NO_SRP
2010         SSL_CTX_SRP_CTX_free(a);
2011 #endif
2012 #ifndef OPENSSL_NO_ENGINE
2013         if (a->client_cert_engine)
2014                 ENGINE_finish(a->client_cert_engine);
2015 #endif
2016
2017 #ifndef OPENSSL_NO_BUF_FREELISTS
2018         if (a->wbuf_freelist)
2019                 ssl_buf_freelist_free(a->wbuf_freelist);
2020         if (a->rbuf_freelist)
2021                 ssl_buf_freelist_free(a->rbuf_freelist);
2022 #endif
2023 #ifndef OPENSSL_NO_TLSEXT
2024 # ifndef OPENSSL_NO_EC
2025         if (a->tlsext_ecpointformatlist)
2026                 OPENSSL_free(a->tlsext_ecpointformatlist);
2027         if (a->tlsext_ellipticcurvelist)
2028                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2029 # endif /* OPENSSL_NO_EC */
2030 #endif
2031
2032         OPENSSL_free(a);
2033         }
2034
2035 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2036         {
2037         ctx->default_passwd_callback=cb;
2038         }
2039
2040 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2041         {
2042         ctx->default_passwd_callback_userdata=u;
2043         }
2044
2045 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2046         {
2047         ctx->app_verify_callback=cb;
2048         ctx->app_verify_arg=arg;
2049         }
2050
2051 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2052         {
2053         ctx->verify_mode=mode;
2054         ctx->default_verify_callback=cb;
2055         }
2056
2057 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2058         {
2059         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2060         }
2061
2062 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2063         {
2064         ssl_cert_set_cert_cb(c->cert, cb, arg);
2065         }
2066
2067 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2068         {
2069         ssl_cert_set_cert_cb(s->cert, cb, arg);
2070         }
2071
2072 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2073         {
2074         CERT_PKEY *cpk;
2075         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2076         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2077         int rsa_tmp_export,dh_tmp_export,kl;
2078         unsigned long mask_k,mask_a,emask_k,emask_a;
2079         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2080 #ifndef OPENSSL_NO_ECDH
2081         int have_ecdh_tmp;
2082 #endif
2083         X509 *x = NULL;
2084         EVP_PKEY *ecc_pkey = NULL;
2085         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2086
2087         if (c == NULL) return;
2088
2089         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2090
2091 #ifndef OPENSSL_NO_RSA
2092         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2093         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2094                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2095 #else
2096         rsa_tmp=rsa_tmp_export=0;
2097 #endif
2098 #ifndef OPENSSL_NO_DH
2099         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2100         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2101                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2102 #else
2103         dh_tmp=dh_tmp_export=0;
2104 #endif
2105
2106 #ifndef OPENSSL_NO_ECDH
2107         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2108 #endif
2109         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2110         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2111         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2112         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2113         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2114         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2115         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2116         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2117         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2118         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2119         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2120 /* FIX THIS EAY EAY EAY */
2121         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2122         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2123         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2124         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2125         mask_k=0;
2126         mask_a=0;
2127         emask_k=0;
2128         emask_a=0;
2129
2130
2131
2132 #ifdef CIPHER_DEBUG
2133         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2134                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2135                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2136 #endif
2137
2138         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2139         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2140                 mask_k |= SSL_kGOST;
2141                 mask_a |= SSL_aGOST01;
2142         }
2143         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2144         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2145                 mask_k |= SSL_kGOST;
2146                 mask_a |= SSL_aGOST94;
2147         }
2148
2149         if (rsa_enc || (rsa_tmp && rsa_sign))
2150                 mask_k|=SSL_kRSA;
2151         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2152                 emask_k|=SSL_kRSA;
2153
2154 #if 0
2155         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2156         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2157                 (rsa_enc || rsa_sign || dsa_sign))
2158                 mask_k|=SSL_kEDH;
2159         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2160                 (rsa_enc || rsa_sign || dsa_sign))
2161                 emask_k|=SSL_kEDH;
2162 #endif
2163
2164         if (dh_tmp_export)
2165                 emask_k|=SSL_kEDH;
2166
2167         if (dh_tmp)
2168                 mask_k|=SSL_kEDH;
2169
2170         if (dh_rsa) mask_k|=SSL_kDHr;
2171         if (dh_rsa_export) emask_k|=SSL_kDHr;
2172
2173         if (dh_dsa) mask_k|=SSL_kDHd;
2174         if (dh_dsa_export) emask_k|=SSL_kDHd;
2175
2176         if (emask_k & (SSL_kDHr|SSL_kDHd))
2177                 mask_a |= SSL_aDH;
2178
2179         if (rsa_enc || rsa_sign)
2180                 {
2181                 mask_a|=SSL_aRSA;
2182                 emask_a|=SSL_aRSA;
2183                 }
2184
2185         if (dsa_sign)
2186                 {
2187                 mask_a|=SSL_aDSS;
2188                 emask_a|=SSL_aDSS;
2189                 }
2190
2191         mask_a|=SSL_aNULL;
2192         emask_a|=SSL_aNULL;
2193
2194 #ifndef OPENSSL_NO_KRB5
2195         mask_k|=SSL_kKRB5;
2196         mask_a|=SSL_aKRB5;
2197         emask_k|=SSL_kKRB5;
2198         emask_a|=SSL_aKRB5;
2199 #endif
2200
2201         /* An ECC certificate may be usable for ECDH and/or
2202          * ECDSA cipher suites depending on the key usage extension.
2203          */
2204         if (have_ecc_cert)
2205                 {
2206                 cpk = &c->pkeys[SSL_PKEY_ECC];
2207                 x = cpk->x509;
2208                 /* This call populates extension flags (ex_flags) */
2209                 X509_check_purpose(x, -1, 0);
2210                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2211                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2212                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2213                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2214                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2215                         ecdsa_ok = 0;
2216                 ecc_pkey = X509_get_pubkey(x);
2217                 ecc_pkey_size = (ecc_pkey != NULL) ?
2218                     EVP_PKEY_bits(ecc_pkey) : 0;
2219                 EVP_PKEY_free(ecc_pkey);
2220                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2221                         {
2222                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2223                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2224                         }
2225 #ifndef OPENSSL_NO_ECDH
2226                 if (ecdh_ok)
2227                         {
2228
2229                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2230                                 {
2231                                 mask_k|=SSL_kECDHr;
2232                                 mask_a|=SSL_aECDH;
2233                                 if (ecc_pkey_size <= 163)
2234                                         {
2235                                         emask_k|=SSL_kECDHr;
2236                                         emask_a|=SSL_aECDH;
2237                                         }
2238                                 }
2239
2240                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2241                                 {
2242                                 mask_k|=SSL_kECDHe;
2243                                 mask_a|=SSL_aECDH;
2244                                 if (ecc_pkey_size <= 163)
2245                                         {
2246                                         emask_k|=SSL_kECDHe;
2247                                         emask_a|=SSL_aECDH;
2248                                         }
2249                                 }
2250                         }
2251 #endif
2252 #ifndef OPENSSL_NO_ECDSA
2253                 if (ecdsa_ok)
2254                         {
2255                         mask_a|=SSL_aECDSA;
2256                         emask_a|=SSL_aECDSA;
2257                         }
2258 #endif
2259                 }
2260
2261 #ifndef OPENSSL_NO_ECDH
2262         if (have_ecdh_tmp)
2263                 {
2264                 mask_k|=SSL_kEECDH;
2265                 emask_k|=SSL_kEECDH;
2266                 }
2267 #endif
2268
2269 #ifndef OPENSSL_NO_PSK
2270         mask_k |= SSL_kPSK;
2271         mask_a |= SSL_aPSK;
2272         emask_k |= SSL_kPSK;
2273         emask_a |= SSL_aPSK;
2274 #endif
2275
2276         c->mask_k=mask_k;
2277         c->mask_a=mask_a;
2278         c->export_mask_k=emask_k;
2279         c->export_mask_a=emask_a;
2280         c->valid=1;
2281         }
2282
2283 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2284 #define ku_reject(x, usage) \
2285         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2286
2287 #ifndef OPENSSL_NO_EC
2288
2289 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2290         {
2291         unsigned long alg_k, alg_a;
2292         EVP_PKEY *pkey = NULL;
2293         int keysize = 0;
2294         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2295         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2296
2297         alg_k = cs->algorithm_mkey;
2298         alg_a = cs->algorithm_auth;
2299
2300         if (SSL_C_IS_EXPORT(cs))
2301                 {
2302                 /* ECDH key length in export ciphers must be <= 163 bits */
2303                 pkey = X509_get_pubkey(x);
2304                 if (pkey == NULL) return 0;
2305                 keysize = EVP_PKEY_bits(pkey);
2306                 EVP_PKEY_free(pkey);
2307                 if (keysize > 163) return 0;
2308                 }
2309
2310         /* This call populates the ex_flags field correctly */
2311         X509_check_purpose(x, -1, 0);
2312         if ((x->sig_alg) && (x->sig_alg->algorithm))
2313                 {
2314                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2315                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2316                 }
2317         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2318                 {
2319                 /* key usage, if present, must allow key agreement */
2320                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2321                         {
2322                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2323                         return 0;
2324                         }
2325                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2326                         {
2327                         /* signature alg must be ECDSA */
2328                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2329                                 {
2330                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2331                                 return 0;
2332                                 }
2333                         }
2334                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2335                         {
2336                         /* signature alg must be RSA */
2337
2338                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2339                                 {
2340                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2341                                 return 0;
2342                                 }
2343                         }
2344                 }
2345         if (alg_a & SSL_aECDSA)
2346                 {
2347                 /* key usage, if present, must allow signing */
2348                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2349                         {
2350                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2351                         return 0;
2352                         }
2353                 }
2354
2355         return 1;  /* all checks are ok */
2356         }
2357
2358 #endif
2359
2360 static int ssl_get_server_cert_index(const SSL *s)
2361         {
2362         int idx;
2363         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2364         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2365                 idx = SSL_PKEY_RSA_SIGN;
2366         if (idx == -1)
2367                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2368         return idx;
2369         }
2370
2371 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2372         {
2373         CERT *c;
2374         int i;
2375
2376         c = s->cert;
2377         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2378
2379 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2380         /* Broken protocol test: return last used certificate: which may
2381          * mismatch the one expected.
2382          */
2383         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTCOL)
2384                 return c->key;
2385 #endif
2386
2387         i = ssl_get_server_cert_index(s);
2388
2389         /* This may or may not be an error. */
2390         if (i < 0)
2391                 return NULL;
2392
2393         /* May be NULL. */
2394         return &c->pkeys[i];
2395         }
2396
2397 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2398         {
2399         unsigned long alg_a;
2400         CERT *c;
2401         int idx = -1;
2402
2403         alg_a = cipher->algorithm_auth;
2404         c=s->cert;
2405
2406 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2407         /* Broken protocol test: use last key: which may
2408          * mismatch the one expected.
2409          */
2410         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTCOL)
2411                 idx = c->key - c->pkeys;
2412         else
2413 #endif
2414
2415         if ((alg_a & SSL_aDSS) &&
2416                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2417                 idx = SSL_PKEY_DSA_SIGN;
2418         else if (alg_a & SSL_aRSA)
2419                 {
2420                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2421                         idx = SSL_PKEY_RSA_SIGN;
2422                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2423                         idx = SSL_PKEY_RSA_ENC;
2424                 }
2425         else if ((alg_a & SSL_aECDSA) &&
2426                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2427                 idx = SSL_PKEY_ECC;
2428         if (idx == -1)
2429                 {
2430                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2431                 return(NULL);
2432                 }
2433         if (pmd)
2434                 *pmd = c->pkeys[idx].digest;
2435         return c->pkeys[idx].privatekey;
2436         }
2437
2438 #ifndef OPENSSL_NO_TLSEXT
2439 unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
2440         {
2441         CERT *c;
2442         int i;
2443
2444         c = s->cert;
2445         i = ssl_get_server_cert_index(s);
2446
2447         if (i == -1)
2448                 return NULL;
2449
2450         *authz_length = 0;
2451         if (c->pkeys[i].authz == NULL)
2452                 return(NULL);
2453         *authz_length = c->pkeys[i].authz_length;
2454
2455         return c->pkeys[i].authz;
2456         }
2457 #endif
2458
2459 void ssl_update_cache(SSL *s,int mode)
2460         {
2461         int i;
2462
2463         /* If the session_id_length is 0, we are not supposed to cache it,
2464          * and it would be rather hard to do anyway :-) */
2465         if (s->session->session_id_length == 0) return;
2466
2467         i=s->session_ctx->session_cache_mode;
2468         if ((i & mode) && (!s->hit)
2469                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2470                     || SSL_CTX_add_session(s->session_ctx,s->session))
2471                 && (s->session_ctx->new_session_cb != NULL))
2472                 {
2473                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2474                 if (!s->session_ctx->new_session_cb(s,s->session))
2475                         SSL_SESSION_free(s->session);
2476                 }
2477
2478         /* auto flush every 255 connections */
2479         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2480                 ((i & mode) == mode))
2481                 {
2482                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2483                         ?s->session_ctx->stats.sess_connect_good
2484                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2485                         {
2486                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2487                         }
2488                 }
2489         }
2490
2491 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2492         {
2493         return(s->method);
2494         }
2495
2496 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2497         {
2498         int conn= -1;
2499         int ret=1;
2500
2501         if (s->method != meth)
2502                 {
2503                 if (s->handshake_func != NULL)
2504                         conn=(s->handshake_func == s->method->ssl_connect);
2505
2506                 if (s->method->version == meth->version)
2507                         s->method=meth;
2508                 else
2509                         {
2510                         s->method->ssl_free(s);
2511                         s->method=meth;
2512                         ret=s->method->ssl_new(s);
2513                         }
2514
2515                 if (conn == 1)
2516                         s->handshake_func=meth->ssl_connect;
2517                 else if (conn == 0)
2518                         s->handshake_func=meth->ssl_accept;
2519                 }
2520         return(ret);
2521         }
2522
2523 int SSL_get_error(const SSL *s,int i)
2524         {
2525         int reason;
2526         unsigned long l;
2527         BIO *bio;
2528
2529         if (i > 0) return(SSL_ERROR_NONE);
2530
2531         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2532          * etc, where we do encode the error */
2533         if ((l=ERR_peek_error()) != 0)
2534                 {
2535                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2536                         return(SSL_ERROR_SYSCALL);
2537                 else
2538                         return(SSL_ERROR_SSL);
2539                 }
2540
2541         if ((i < 0) && SSL_want_read(s))
2542                 {
2543                 bio=SSL_get_rbio(s);
2544                 if (BIO_should_read(bio))
2545                         return(SSL_ERROR_WANT_READ);
2546                 else if (BIO_should_write(bio))
2547                         /* This one doesn't make too much sense ... We never try
2548                          * to write to the rbio, and an application program where
2549                          * rbio and wbio are separate couldn't even know what it
2550                          * should wait for.
2551                          * However if we ever set s->rwstate incorrectly
2552                          * (so that we have SSL_want_read(s) instead of
2553                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2554                          * this test works around that bug; so it might be safer
2555                          * to keep it. */
2556                         return(SSL_ERROR_WANT_WRITE);
2557                 else if (BIO_should_io_special(bio))
2558                         {
2559                         reason=BIO_get_retry_reason(bio);
2560                         if (reason == BIO_RR_CONNECT)
2561                                 return(SSL_ERROR_WANT_CONNECT);
2562                         else if (reason == BIO_RR_ACCEPT)
2563                                 return(SSL_ERROR_WANT_ACCEPT);
2564                         else
2565                                 return(SSL_ERROR_SYSCALL); /* unknown */
2566                         }
2567                 }
2568
2569         if ((i < 0) && SSL_want_write(s))
2570                 {
2571                 bio=SSL_get_wbio(s);
2572                 if (BIO_should_write(bio))
2573                         return(SSL_ERROR_WANT_WRITE);
2574                 else if (BIO_should_read(bio))
2575                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2576                         return(SSL_ERROR_WANT_READ);
2577                 else if (BIO_should_io_special(bio))
2578                         {
2579                         reason=BIO_get_retry_reason(bio);
2580                         if (reason == BIO_RR_CONNECT)
2581                                 return(SSL_ERROR_WANT_CONNECT);
2582                         else if (reason == BIO_RR_ACCEPT)
2583                                 return(SSL_ERROR_WANT_ACCEPT);
2584                         else
2585                                 return(SSL_ERROR_SYSCALL);
2586                         }
2587                 }
2588         if ((i < 0) && SSL_want_x509_lookup(s))
2589                 {
2590                 return(SSL_ERROR_WANT_X509_LOOKUP);
2591                 }
2592
2593         if (i == 0)
2594                 {
2595                 if (s->version == SSL2_VERSION)
2596                         {
2597                         /* assume it is the socket being closed */
2598                         return(SSL_ERROR_ZERO_RETURN);
2599                         }
2600                 else
2601                         {
2602                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2603                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2604                                 return(SSL_ERROR_ZERO_RETURN);
2605                         }
2606                 }
2607         return(SSL_ERROR_SYSCALL);
2608         }
2609
2610 int SSL_do_handshake(SSL *s)
2611         {
2612         int ret=1;
2613
2614         if (s->handshake_func == NULL)
2615                 {
2616                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2617                 return(-1);
2618                 }
2619
2620         s->method->ssl_renegotiate_check(s);
2621
2622         if (SSL_in_init(s) || SSL_in_before(s))
2623                 {
2624                 ret=s->handshake_func(s);
2625                 }
2626         return(ret);
2627         }
2628
2629 /* For the next 2 functions, SSL_clear() sets shutdown and so
2630  * one of these calls will reset it */
2631 void SSL_set_accept_state(SSL *s)
2632         {
2633         s->server=1;
2634         s->shutdown=0;
2635         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2636         s->handshake_func=s->method->ssl_accept;
2637         /* clear the current cipher */
2638         ssl_clear_cipher_ctx(s);
2639         ssl_clear_hash_ctx(&s->read_hash);
2640         ssl_clear_hash_ctx(&s->write_hash);
2641         }
2642
2643 void SSL_set_connect_state(SSL *s)
2644         {
2645         s->server=0;
2646         s->shutdown=0;
2647         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2648         s->handshake_func=s->method->ssl_connect;
2649         /* clear the current cipher */
2650         ssl_clear_cipher_ctx(s);
2651         ssl_clear_hash_ctx(&s->read_hash);
2652         ssl_clear_hash_ctx(&s->write_hash);
2653         }
2654
2655 int ssl_undefined_function(SSL *s)
2656         {
2657         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2658         return(0);
2659         }
2660
2661 int ssl_undefined_void_function(void)
2662         {
2663         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2664         return(0);
2665         }
2666
2667 int ssl_undefined_const_function(const SSL *s)
2668         {
2669         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2670         return(0);
2671         }
2672
2673 SSL_METHOD *ssl_bad_method(int ver)
2674         {
2675         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2676         return(NULL);
2677         }
2678
2679 const char *SSL_get_version(const SSL *s)
2680         {
2681         if (s->version == TLS1_2_VERSION)
2682                 return("TLSv1.2");
2683         else if (s->version == TLS1_1_VERSION)
2684                 return("TLSv1.1");
2685         else if (s->version == TLS1_VERSION)
2686                 return("TLSv1");
2687         else if (s->version == SSL3_VERSION)
2688                 return("SSLv3");
2689         else if (s->version == SSL2_VERSION)
2690                 return("SSLv2");
2691         else
2692                 return("unknown");
2693         }
2694
2695 SSL *SSL_dup(SSL *s)
2696         {
2697         STACK_OF(X509_NAME) *sk;
2698         X509_NAME *xn;
2699         SSL *ret;
2700         int i;
2701
2702         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2703             return(NULL);
2704
2705         ret->version = s->version;
2706         ret->type = s->type;
2707         ret->method = s->method;
2708
2709         if (s->session != NULL)
2710                 {
2711                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2712                 SSL_copy_session_id(ret,s);
2713                 }
2714         else
2715                 {
2716                 /* No session has been established yet, so we have to expect
2717                  * that s->cert or ret->cert will be changed later --
2718                  * they should not both point to the same object,
2719                  * and thus we can't use SSL_copy_session_id. */
2720
2721                 ret->method->ssl_free(ret);
2722                 ret->method = s->method;
2723                 ret->method->ssl_new(ret);
2724
2725                 if (s->cert != NULL)
2726                         {
2727                         if (ret->cert != NULL)
2728                                 {
2729                                 ssl_cert_free(ret->cert);
2730                                 }
2731                         ret->cert = ssl_cert_dup(s->cert);
2732                         if (ret->cert == NULL)
2733                                 goto err;
2734                         }
2735
2736                 SSL_set_session_id_context(ret,
2737                         s->sid_ctx, s->sid_ctx_length);
2738                 }
2739
2740         ret->options=s->options;
2741         ret->mode=s->mode;
2742         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2743         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2744         ret->msg_callback = s->msg_callback;
2745         ret->msg_callback_arg = s->msg_callback_arg;
2746         SSL_set_verify(ret,SSL_get_verify_mode(s),
2747                 SSL_get_verify_callback(s));
2748         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2749         ret->generate_session_id = s->generate_session_id;
2750
2751         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2752
2753         ret->debug=s->debug;
2754
2755         /* copy app data, a little dangerous perhaps */
2756         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2757                 goto err;
2758
2759         /* setup rbio, and wbio */
2760         if (s->rbio != NULL)
2761                 {
2762                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2763                         goto err;
2764                 }
2765         if (s->wbio != NULL)
2766                 {
2767                 if (s->wbio != s->rbio)
2768                         {
2769                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2770                                 goto err;
2771                         }
2772                 else
2773                         ret->wbio=ret->rbio;
2774                 }
2775         ret->rwstate = s->rwstate;
2776         ret->in_handshake = s->in_handshake;
2777         ret->handshake_func = s->handshake_func;
2778         ret->server = s->server;
2779         ret->renegotiate = s->renegotiate;
2780         ret->new_session = s->new_session;
2781         ret->quiet_shutdown = s->quiet_shutdown;
2782         ret->shutdown=s->shutdown;
2783         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2784         ret->rstate=s->rstate;
2785         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2786         ret->hit=s->hit;
2787
2788         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2789
2790         /* dup the cipher_list and cipher_list_by_id stacks */
2791         if (s->cipher_list != NULL)
2792                 {
2793                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2794                         goto err;
2795                 }
2796         if (s->cipher_list_by_id != NULL)
2797                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2798                         == NULL)
2799                         goto err;
2800
2801         /* Dup the client_CA list */
2802         if (s->client_CA != NULL)
2803                 {
2804                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2805                 ret->client_CA=sk;
2806                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2807                         {
2808                         xn=sk_X509_NAME_value(sk,i);
2809                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2810                                 {
2811                                 X509_NAME_free(xn);
2812                                 goto err;
2813                                 }
2814                         }
2815                 }
2816
2817         if (0)
2818                 {
2819 err:
2820                 if (ret != NULL) SSL_free(ret);
2821                 ret=NULL;
2822                 }
2823         return(ret);
2824         }
2825
2826 void ssl_clear_cipher_ctx(SSL *s)
2827         {
2828         if (s->enc_read_ctx != NULL)
2829                 {
2830                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2831                 OPENSSL_free(s->enc_read_ctx);
2832                 s->enc_read_ctx=NULL;
2833                 }
2834         if (s->enc_write_ctx != NULL)
2835                 {
2836                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2837                 OPENSSL_free(s->enc_write_ctx);
2838                 s->enc_write_ctx=NULL;
2839                 }
2840 #ifndef OPENSSL_NO_COMP
2841         if (s->expand != NULL)
2842                 {
2843                 COMP_CTX_free(s->expand);
2844                 s->expand=NULL;
2845                 }
2846         if (s->compress != NULL)
2847                 {
2848                 COMP_CTX_free(s->compress);
2849                 s->compress=NULL;
2850                 }
2851 #endif
2852         }
2853
2854 /* Fix this function so that it takes an optional type parameter */
2855 X509 *SSL_get_certificate(const SSL *s)
2856         {
2857         if (s->cert != NULL)
2858                 return(s->cert->key->x509);
2859         else
2860                 return(NULL);
2861         }
2862
2863 /* Fix this function so that it takes an optional type parameter */
2864 EVP_PKEY *SSL_get_privatekey(SSL *s)
2865         {
2866         if (s->cert != NULL)
2867                 return(s->cert->key->privatekey);
2868         else
2869                 return(NULL);
2870         }
2871
2872 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2873         {
2874         if ((s->session != NULL) && (s->session->cipher != NULL))
2875                 return(s->session->cipher);
2876         return(NULL);
2877         }
2878 #ifdef OPENSSL_NO_COMP
2879 const void *SSL_get_current_compression(SSL *s)
2880         {
2881         return NULL;
2882         }
2883 const void *SSL_get_current_expansion(SSL *s)
2884         {
2885         return NULL;
2886         }
2887 #else
2888
2889 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2890         {
2891         if (s->compress != NULL)
2892                 return(s->compress->meth);
2893         return(NULL);
2894         }
2895
2896 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2897         {
2898         if (s->expand != NULL)
2899                 return(s->expand->meth);
2900         return(NULL);
2901         }
2902 #endif
2903
2904 int ssl_init_wbio_buffer(SSL *s,int push)
2905         {
2906         BIO *bbio;
2907
2908         if (s->bbio == NULL)
2909                 {
2910                 bbio=BIO_new(BIO_f_buffer());
2911                 if (bbio == NULL) return(0);
2912                 s->bbio=bbio;
2913                 }
2914         else
2915                 {
2916                 bbio=s->bbio;
2917                 if (s->bbio == s->wbio)
2918                         s->wbio=BIO_pop(s->wbio);
2919                 }
2920         (void)BIO_reset(bbio);
2921 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2922         if (!BIO_set_read_buffer_size(bbio,1))
2923                 {
2924                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2925                 return(0);
2926                 }
2927         if (push)
2928                 {
2929                 if (s->wbio != bbio)
2930                         s->wbio=BIO_push(bbio,s->wbio);
2931                 }
2932         else
2933                 {
2934                 if (s->wbio == bbio)
2935                         s->wbio=BIO_pop(bbio);
2936                 }
2937         return(1);
2938         }
2939
2940 void ssl_free_wbio_buffer(SSL *s)
2941         {
2942         if (s->bbio == NULL) return;
2943
2944         if (s->bbio == s->wbio)
2945                 {
2946                 /* remove buffering */
2947                 s->wbio=BIO_pop(s->wbio);
2948 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2949                 assert(s->wbio != NULL);
2950 #endif
2951         }
2952         BIO_free(s->bbio);
2953         s->bbio=NULL;
2954         }
2955
2956 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2957         {
2958         ctx->quiet_shutdown=mode;
2959         }
2960
2961 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2962         {
2963         return(ctx->quiet_shutdown);
2964         }
2965
2966 void SSL_set_quiet_shutdown(SSL *s,int mode)
2967         {
2968         s->quiet_shutdown=mode;
2969         }
2970
2971 int SSL_get_quiet_shutdown(const SSL *s)
2972         {
2973         return(s->quiet_shutdown);
2974         }
2975
2976 void SSL_set_shutdown(SSL *s,int mode)
2977         {
2978         s->shutdown=mode;
2979         }
2980
2981 int SSL_get_shutdown(const SSL *s)
2982         {
2983         return(s->shutdown);
2984         }
2985
2986 int SSL_version(const SSL *s)
2987         {
2988         return(s->version);
2989         }
2990
2991 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2992         {
2993         return(ssl->ctx);
2994         }
2995
2996 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2997         {
2998         if (ssl->ctx == ctx)
2999                 return ssl->ctx;
3000 #ifndef OPENSSL_NO_TLSEXT
3001         if (ctx == NULL)
3002                 ctx = ssl->initial_ctx;
3003 #endif
3004         if (ssl->cert != NULL)
3005                 ssl_cert_free(ssl->cert);
3006         ssl->cert = ssl_cert_dup(ctx->cert);
3007         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3008         if (ssl->ctx != NULL)
3009                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3010         ssl->ctx = ctx;
3011         return(ssl->ctx);
3012         }
3013
3014 #ifndef OPENSSL_NO_STDIO
3015 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3016         {
3017         return(X509_STORE_set_default_paths(ctx->cert_store));
3018         }
3019
3020 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3021                 const char *CApath)
3022         {
3023         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3024         }
3025 #endif
3026
3027 void SSL_set_info_callback(SSL *ssl,
3028         void (*cb)(const SSL *ssl,int type,int val))
3029         {
3030         ssl->info_callback=cb;
3031         }
3032
3033 /* One compiler (Diab DCC) doesn't like argument names in returned
3034    function pointer.  */
3035 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3036         {
3037         return ssl->info_callback;
3038         }
3039
3040 int SSL_state(const SSL *ssl)
3041         {
3042         return(ssl->state);
3043         }
3044
3045 void SSL_set_state(SSL *ssl, int state)
3046         {
3047         ssl->state = state;
3048         }
3049
3050 void SSL_set_verify_result(SSL *ssl,long arg)
3051         {
3052         ssl->verify_result=arg;
3053         }
3054
3055 long SSL_get_verify_result(const SSL *ssl)
3056         {
3057         return(ssl->verify_result);
3058         }
3059
3060 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3061                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3062         {
3063         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3064                                 new_func, dup_func, free_func);
3065         }
3066
3067 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3068         {
3069         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3070         }
3071
3072 void *SSL_get_ex_data(const SSL *s,int idx)
3073         {
3074         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3075         }
3076
3077 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3078                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3079         {
3080         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3081                                 new_func, dup_func, free_func);
3082         }
3083
3084 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3085         {
3086         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3087         }
3088
3089 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3090         {
3091         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3092         }
3093
3094 int ssl_ok(SSL *s)
3095         {
3096         return(1);
3097         }
3098
3099 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3100         {
3101         return(ctx->cert_store);
3102         }
3103
3104 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3105         {
3106         if (ctx->cert_store != NULL)
3107                 X509_STORE_free(ctx->cert_store);
3108         ctx->cert_store=store;
3109         }
3110
3111 int SSL_want(const SSL *s)
3112         {
3113         return(s->rwstate);
3114         }
3115
3116 /*!
3117  * \brief Set the callback for generating temporary RSA keys.
3118  * \param ctx the SSL context.
3119  * \param cb the callback
3120  */
3121
3122 #ifndef OPENSSL_NO_RSA
3123 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3124                                                           int is_export,
3125                                                           int keylength))
3126     {
3127     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3128     }
3129
3130 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3131                                                   int is_export,
3132                                                   int keylength))
3133     {
3134     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3135     }
3136 #endif
3137
3138 #ifdef DOXYGEN
3139 /*!
3140  * \brief The RSA temporary key callback function.
3141  * \param ssl the SSL session.
3142  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3143  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3144  * of the required key in bits.
3145  * \return the temporary RSA key.
3146  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3147  */
3148
3149 RSA *cb(SSL *ssl,int is_export,int keylength)
3150     {}
3151 #endif
3152
3153 /*!
3154  * \brief Set the callback for generating temporary DH keys.
3155  * \param ctx the SSL context.
3156  * \param dh the callback
3157  */
3158
3159 #ifndef OPENSSL_NO_DH
3160 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3161                                                         int keylength))
3162         {
3163         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3164         }
3165
3166 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3167                                                 int keylength))
3168         {
3169         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3170         }
3171 #endif
3172
3173 #ifndef OPENSSL_NO_ECDH
3174 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3175                                                                 int keylength))
3176         {
3177         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3178         }
3179
3180 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3181                                                         int keylength))
3182         {
3183         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3184         }
3185 #endif
3186
3187 #ifndef OPENSSL_NO_PSK
3188 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3189         {
3190         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3191                 {
3192                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3193                 return 0;
3194                 }
3195         if (ctx->psk_identity_hint != NULL)
3196                 OPENSSL_free(ctx->psk_identity_hint);
3197         if (identity_hint != NULL)
3198                 {
3199                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3200                 if (ctx->psk_identity_hint == NULL)
3201                         return 0;
3202                 }
3203         else
3204                 ctx->psk_identity_hint = NULL;
3205         return 1;
3206         }
3207
3208 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3209         {
3210         if (s == NULL)
3211                 return 0;
3212
3213         if (s->session == NULL)
3214                 return 1; /* session not created yet, ignored */
3215
3216         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3217                 {
3218                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3219                 return 0;
3220                 }
3221         if (s->session->psk_identity_hint != NULL)
3222                 OPENSSL_free(s->session->psk_identity_hint);
3223         if (identity_hint != NULL)
3224                 {
3225                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3226                 if (s->session->psk_identity_hint == NULL)
3227                         return 0;
3228                 }
3229         else
3230                 s->session->psk_identity_hint = NULL;
3231         return 1;
3232         }
3233
3234 const char *SSL_get_psk_identity_hint(const SSL *s)
3235         {
3236         if (s == NULL || s->session == NULL)
3237                 return NULL;
3238         return(s->session->psk_identity_hint);
3239         }
3240
3241 const char *SSL_get_psk_identity(const SSL *s)
3242         {
3243         if (s == NULL || s->session == NULL)
3244                 return NULL;
3245         return(s->session->psk_identity);
3246         }
3247
3248 void SSL_set_psk_client_callback(SSL *s,
3249     unsigned int (*cb)(SSL *ssl, const char *hint,
3250                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3251                        unsigned int max_psk_len))
3252         {
3253         s->psk_client_callback = cb;
3254         }
3255
3256 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3257     unsigned int (*cb)(SSL *ssl, const char *hint,
3258                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3259                        unsigned int max_psk_len))
3260         {
3261         ctx->psk_client_callback = cb;
3262         }
3263
3264 void SSL_set_psk_server_callback(SSL *s,
3265     unsigned int (*cb)(SSL *ssl, const char *identity,
3266                        unsigned char *psk, unsigned int max_psk_len))
3267         {
3268         s->psk_server_callback = cb;
3269         }
3270
3271 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3272     unsigned int (*cb)(SSL *ssl, const char *identity,
3273                        unsigned char *psk, unsigned int max_psk_len))
3274         {
3275         ctx->psk_server_callback = cb;
3276         }
3277 #endif
3278
3279 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))
3280         {
3281         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3282         }
3283 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))
3284         {
3285         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3286         }
3287
3288 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3289         int (*cb)(SSL *ssl, int is_forward_secure))
3290         {
3291         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3292                 (void (*)(void))cb);
3293         }
3294 void SSL_set_not_resumable_session_callback(SSL *ssl,
3295         int (*cb)(SSL *ssl, int is_forward_secure))
3296         {
3297         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3298                 (void (*)(void))cb);
3299         }
3300
3301 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3302  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3303  * any. If EVP_MD pointer is passed, initializes ctx with this md
3304  * Returns newly allocated ctx;
3305  */
3306
3307 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3308 {
3309         ssl_clear_hash_ctx(hash);
3310         *hash = EVP_MD_CTX_create();
3311         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3312         return *hash;
3313 }
3314 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3315 {
3316
3317         if (*hash) EVP_MD_CTX_destroy(*hash);
3318         *hash=NULL;
3319 }
3320
3321 void SSL_set_debug(SSL *s, int debug)
3322         {
3323         s->debug = debug;
3324         }
3325
3326 int SSL_cache_hit(SSL *s)
3327         {
3328         return s->hit;
3329         }
3330
3331 int SSL_is_server(SSL *s)
3332         {
3333         return s->server;
3334         }
3335
3336 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3337 #include "../crypto/bio/bss_file.c"
3338 #endif
3339
3340 IMPLEMENT_STACK_OF(SSL_CIPHER)
3341 IMPLEMENT_STACK_OF(SSL_COMP)
3342 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3343                                     ssl_cipher_id);