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