crypto/openssl/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) 1998-2001 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 #ifdef REF_CHECK
 120 #  include <assert.h>
 121 #endif
 122 #include <stdio.h>
 123 #include "ssl_locl.h"
 124 #include "kssl_lcl.h"
 125 #include <openssl/objects.h>
 126 #include <openssl/lhash.h>
 127 #include <openssl/x509v3.h>
 128 #include <openssl/rand.h>
 129 #include <openssl/ocsp.h>
 130 #ifndef OPENSSL_NO_DH
 131 #include <openssl/dh.h>
 132 #endif
 133 #ifndef OPENSSL_NO_ENGINE
 134 #include <openssl/engine.h>
 135 #endif
 136
 137 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 138
 139 SSL3_ENC_METHOD ssl3_undef_enc_method={
 140         /* evil casts, but these functions are only called if there's a library bug */
 141         (int (*)(SSL *,int))ssl_undefined_function,
 142         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 143         ssl_undefined_function,
 144         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 145         (int (*)(SSL*, int))ssl_undefined_function,
 146         (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function,
 147         0,      /* finish_mac_length */
 148         (int (*)(SSL *, EVP_MD_CTX *, unsigned char *))ssl_undefined_function,
 149         NULL,   /* client_finished_label */
 150         0,      /* client_finished_label_len */
 151         NULL,   /* server_finished_label */
 152         0,      /* server_finished_label_len */
 153         (int (*)(int))ssl_undefined_function
 154         };
 155
 156 int SSL_clear(SSL *s)
 157         {
 158
 159         if (s->method == NULL)
 160                 {
 161                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 162                 return(0);
 163                 }
 164
 165         if (ssl_clear_bad_session(s))
 166                 {
 167                 SSL_SESSION_free(s->session);
 168                 s->session=NULL;
 169                 }
 170
 171         s->error=0;
 172         s->hit=0;
 173         s->shutdown=0;
 174
 175 #if 0 /* Disabled since version 1.10 of this file (early return not
 176        * needed because SSL_clear is not called when doing renegotiation) */
 177         /* This is set if we are doing dynamic renegotiation so keep
 178          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 179         if (s->new_session) return(1);
 180 #else
 181         if (s->new_session)
 182                 {
 183                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 184                 return 0;
 185                 }
 186 #endif
 187
 188         s->type=0;
 189
 190         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 191
 192         s->version=s->method->version;
 193         s->client_version=s->version;
 194         s->rwstate=SSL_NOTHING;
 195         s->rstate=SSL_ST_READ_HEADER;
 196 #if 0
 197         s->read_ahead=s->ctx->read_ahead;
 198 #endif
 199
 200         if (s->init_buf != NULL)
 201                 {
 202                 BUF_MEM_free(s->init_buf);
 203                 s->init_buf=NULL;
 204                 }
 205
 206         ssl_clear_cipher_ctx(s);
 207
 208         s->first_packet=0;
 209
 210 #if 1
 211         /* Check to see if we were changed into a different method, if
 212          * so, revert back if we are not doing session-id reuse. */
 213         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 214                 {
 215                 s->method->ssl_free(s);
 216                 s->method=s->ctx->method;
 217                 if (!s->method->ssl_new(s))
 218                         return(0);
 219                 }
 220         else
 221 #endif
 222                 s->method->ssl_clear(s);
 223         return(1);
 224         }
 225
 226 /** Used to change an SSL_CTXs default SSL method type */
 227 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
 228         {
 229         STACK_OF(SSL_CIPHER) *sk;
 230
 231         ctx->method=meth;
 232
 233         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 234                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 235         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 236                 {
 237                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 238                 return(0);
 239                 }
 240         return(1);
 241         }
 242
 243 SSL *SSL_new(SSL_CTX *ctx)
 244         {
 245         SSL *s;
 246
 247         if (ctx == NULL)
 248                 {
 249                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 250                 return(NULL);
 251                 }
 252         if (ctx->method == NULL)
 253                 {
 254                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 255                 return(NULL);
 256                 }
 257
 258         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 259         if (s == NULL) goto err;
 260         memset(s,0,sizeof(SSL));
 261
 262 #ifndef OPENSSL_NO_KRB5
 263         s->kssl_ctx = kssl_ctx_new();
 264 #endif  /* OPENSSL_NO_KRB5 */
 265
 266         s->options=ctx->options;
 267         s->mode=ctx->mode;
 268         s->max_cert_list=ctx->max_cert_list;
 269
 270         if (ctx->cert != NULL)
 271                 {
 272                 /* Earlier library versions used to copy the pointer to
 273                  * the CERT, not its contents; only when setting new
 274                  * parameters for the per-SSL copy, ssl_cert_new would be
 275                  * called (and the direct reference to the per-SSL_CTX
 276                  * settings would be lost, but those still were indirectly
 277                  * accessed for various purposes, and for that reason they
 278                  * used to be known as s->ctx->default_cert).
 279                  * Now we don't look at the SSL_CTX's CERT after having
 280                  * duplicated it once. */
 281
 282                 s->cert = ssl_cert_dup(ctx->cert);
 283                 if (s->cert == NULL)
 284                         goto err;
 285                 }
 286         else
 287                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 288
 289         s->read_ahead=ctx->read_ahead;
 290         s->msg_callback=ctx->msg_callback;
 291         s->msg_callback_arg=ctx->msg_callback_arg;
 292         s->verify_mode=ctx->verify_mode;
 293 #if 0
 294         s->verify_depth=ctx->verify_depth;
 295 #endif
 296         s->sid_ctx_length=ctx->sid_ctx_length;
 297         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 298         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 299         s->verify_callback=ctx->default_verify_callback;
 300         s->generate_session_id=ctx->generate_session_id;
 301
 302         s->param = X509_VERIFY_PARAM_new();
 303         if (!s->param)
 304                 goto err;
 305         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 306 #if 0
 307         s->purpose = ctx->purpose;
 308         s->trust = ctx->trust;
 309 #endif
 310         s->quiet_shutdown=ctx->quiet_shutdown;
 311
 312         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 313         s->ctx=ctx;
 314 #ifndef OPENSSL_NO_TLSEXT
 315         s->tlsext_debug_cb = 0;
 316         s->tlsext_debug_arg = NULL;
 317         s->tlsext_ticket_expected = 0;
 318         s->tlsext_status_type = -1;
 319         s->tlsext_status_expected = 0;
 320         s->tlsext_ocsp_ids = NULL;
 321         s->tlsext_ocsp_exts = NULL;
 322         s->tlsext_ocsp_resp = NULL;
 323         s->tlsext_ocsp_resplen = -1;
 324         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 325         s->initial_ctx=ctx;
 326 #endif
 327         s->verify_result=X509_V_OK;
 328
 329         s->method=ctx->method;
 330
 331         if (!s->method->ssl_new(s))
 332                 goto err;
 333
 334         s->references=1;
 335         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 336
 337         SSL_clear(s);
 338
 339         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 340
 341         return(s);
 342 err:
 343         if (s != NULL)
 344                 {
 345                 if (s->cert != NULL)
 346                         ssl_cert_free(s->cert);
 347                 if (s->ctx != NULL)
 348                         SSL_CTX_free(s->ctx); /* decrement reference count */
 349                 OPENSSL_free(s);
 350                 }
 351         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 352         return(NULL);
 353         }
 354
 355 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 356                                    unsigned int sid_ctx_len)
 357     {
 358     if(sid_ctx_len > sizeof ctx->sid_ctx)
 359         {
 360         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 361         return 0;
 362         }
 363     ctx->sid_ctx_length=sid_ctx_len;
 364     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 365
 366     return 1;
 367     }
 368
 369 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 370                                unsigned int sid_ctx_len)
 371     {
 372     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 373         {
 374         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 375         return 0;
 376         }
 377     ssl->sid_ctx_length=sid_ctx_len;
 378     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 379
 380     return 1;
 381     }
 382
 383 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 384         {
 385         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 386         ctx->generate_session_id = cb;
 387         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 388         return 1;
 389         }
 390
 391 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 392         {
 393         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 394         ssl->generate_session_id = cb;
 395         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 396         return 1;
 397         }
 398
 399 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 400                                 unsigned int id_len)
 401         {
 402         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 403          * we can "construct" a session to give us the desired check - ie. to
 404          * find if there's a session in the hash table that would conflict with
 405          * any new session built out of this id/id_len and the ssl_version in
 406          * use by this SSL. */
 407         SSL_SESSION r, *p;
 408
 409         if(id_len > sizeof r.session_id)
 410                 return 0;
 411
 412         r.ssl_version = ssl->version;
 413         r.session_id_length = id_len;
 414         memcpy(r.session_id, id, id_len);
 415         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 416          * callback is calling us to check the uniqueness of a shorter ID, it
 417          * must be compared as a padded-out ID because that is what it will be
 418          * converted to when the callback has finished choosing it. */
 419         if((r.ssl_version == SSL2_VERSION) &&
 420                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 421                 {
 422                 memset(r.session_id + id_len, 0,
 423                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 424                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 425                 }
 426
 427         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 428         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
 429         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 430         return (p != NULL);
 431         }
 432
 433 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 434         {
 435         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 436         }
 437
 438 int SSL_set_purpose(SSL *s, int purpose)
 439         {
 440         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 441         }
 442
 443 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 444         {
 445         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 446         }
 447
 448 int SSL_set_trust(SSL *s, int trust)
 449         {
 450         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 451         }
 452
 453 void SSL_free(SSL *s)
 454         {
 455         int i;
 456
 457         if(s == NULL)
 458             return;
 459
 460         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 461 #ifdef REF_PRINT
 462         REF_PRINT("SSL",s);
 463 #endif
 464         if (i > 0) return;
 465 #ifdef REF_CHECK
 466         if (i < 0)
 467                 {
 468                 fprintf(stderr,"SSL_free, bad reference count\n");
 469                 abort(); /* ok */
 470                 }
 471 #endif
 472
 473         if (s->param)
 474                 X509_VERIFY_PARAM_free(s->param);
 475
 476         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 477
 478         if (s->bbio != NULL)
 479                 {
 480                 /* If the buffering BIO is in place, pop it off */
 481                 if (s->bbio == s->wbio)
 482                         {
 483                         s->wbio=BIO_pop(s->wbio);
 484                         }
 485                 BIO_free(s->bbio);
 486                 s->bbio=NULL;
 487                 }
 488         if (s->rbio != NULL)
 489                 BIO_free_all(s->rbio);
 490         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 491                 BIO_free_all(s->wbio);
 492
 493         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 494
 495         /* add extra stuff */
 496         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 497         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 498
 499         /* Make the next call work :-) */
 500         if (s->session != NULL)
 501                 {
 502                 ssl_clear_bad_session(s);
 503                 SSL_SESSION_free(s->session);
 504                 }
 505
 506         ssl_clear_cipher_ctx(s);
 507
 508         if (s->cert != NULL) ssl_cert_free(s->cert);
 509         /* Free up if allocated */
 510
 511 #ifndef OPENSSL_NO_TLSEXT
 512         if (s->tlsext_hostname)
 513                 OPENSSL_free(s->tlsext_hostname);
 514         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 515         if (s->tlsext_ocsp_exts)
 516                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 517                                                 X509_EXTENSION_free);
 518         if (s->tlsext_ocsp_ids)
 519                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 520         if (s->tlsext_ocsp_resp)
 521                 OPENSSL_free(s->tlsext_ocsp_resp);
 522 #endif
 523         if (s->client_CA != NULL)
 524                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 525
 526         if (s->method != NULL) s->method->ssl_free(s);
 527
 528         if (s->ctx) SSL_CTX_free(s->ctx);
 529
 530 #ifndef OPENSSL_NO_KRB5
 531         if (s->kssl_ctx != NULL)
 532                 kssl_ctx_free(s->kssl_ctx);
 533 #endif  /* OPENSSL_NO_KRB5 */
 534
 535         OPENSSL_free(s);
 536         }
 537
 538 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 539         {
 540         /* If the output buffering BIO is still in place, remove it
 541          */
 542         if (s->bbio != NULL)
 543                 {
 544                 if (s->wbio == s->bbio)
 545                         {
 546                         s->wbio=s->wbio->next_bio;
 547                         s->bbio->next_bio=NULL;
 548                         }
 549                 }
 550         if ((s->rbio != NULL) && (s->rbio != rbio))
 551                 BIO_free_all(s->rbio);
 552         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 553                 BIO_free_all(s->wbio);
 554         s->rbio=rbio;
 555         s->wbio=wbio;
 556         }
 557
 558 BIO *SSL_get_rbio(const SSL *s)
 559         { return(s->rbio); }
 560
 561 BIO *SSL_get_wbio(const SSL *s)
 562         { return(s->wbio); }
 563
 564 int SSL_get_fd(const SSL *s)
 565         {
 566         return(SSL_get_rfd(s));
 567         }
 568
 569 int SSL_get_rfd(const SSL *s)
 570         {
 571         int ret= -1;
 572         BIO *b,*r;
 573
 574         b=SSL_get_rbio(s);
 575         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 576         if (r != NULL)
 577                 BIO_get_fd(r,&ret);
 578         return(ret);
 579         }
 580
 581 int SSL_get_wfd(const SSL *s)
 582         {
 583         int ret= -1;
 584         BIO *b,*r;
 585
 586         b=SSL_get_wbio(s);
 587         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 588         if (r != NULL)
 589                 BIO_get_fd(r,&ret);
 590         return(ret);
 591         }
 592
 593 #ifndef OPENSSL_NO_SOCK
 594 int SSL_set_fd(SSL *s,int fd)
 595         {
 596         int ret=0;
 597         BIO *bio=NULL;
 598
 599         bio=BIO_new(BIO_s_socket());
 600
 601         if (bio == NULL)
 602                 {
 603                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 604                 goto err;
 605                 }
 606         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 607         SSL_set_bio(s,bio,bio);
 608         ret=1;
 609 err:
 610         return(ret);
 611         }
 612
 613 int SSL_set_wfd(SSL *s,int fd)
 614         {
 615         int ret=0;
 616         BIO *bio=NULL;
 617
 618         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 619                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 620                 {
 621                 bio=BIO_new(BIO_s_socket());
 622
 623                 if (bio == NULL)
 624                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 625                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 626                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 627                 }
 628         else
 629                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 630         ret=1;
 631 err:
 632         return(ret);
 633         }
 634
 635 int SSL_set_rfd(SSL *s,int fd)
 636         {
 637         int ret=0;
 638         BIO *bio=NULL;
 639
 640         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 641                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 642                 {
 643                 bio=BIO_new(BIO_s_socket());
 644
 645                 if (bio == NULL)
 646                         {
 647                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 648                         goto err;
 649                         }
 650                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 651                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 652                 }
 653         else
 654                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 655         ret=1;
 656 err:
 657         return(ret);
 658         }
 659 #endif
 660
 661
 662 /* return length of latest Finished message we sent, copy to 'buf' */
 663 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 664         {
 665         size_t ret = 0;
 666
 667         if (s->s3 != NULL)
 668                 {
 669                 ret = s->s3->tmp.finish_md_len;
 670                 if (count > ret)
 671                         count = ret;
 672                 memcpy(buf, s->s3->tmp.finish_md, count);
 673                 }
 674         return ret;
 675         }
 676
 677 /* return length of latest Finished message we expected, copy to 'buf' */
 678 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 679         {
 680         size_t ret = 0;
 681
 682         if (s->s3 != NULL)
 683                 {
 684                 ret = s->s3->tmp.peer_finish_md_len;
 685                 if (count > ret)
 686                         count = ret;
 687                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 688                 }
 689         return ret;
 690         }
 691
 692
 693 int SSL_get_verify_mode(const SSL *s)
 694         {
 695         return(s->verify_mode);
 696         }
 697
 698 int SSL_get_verify_depth(const SSL *s)
 699         {
 700         return X509_VERIFY_PARAM_get_depth(s->param);
 701         }
 702
 703 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 704         {
 705         return(s->verify_callback);
 706         }
 707
 708 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 709         {
 710         return(ctx->verify_mode);
 711         }
 712
 713 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 714         {
 715         return X509_VERIFY_PARAM_get_depth(ctx->param);
 716         }
 717
 718 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 719         {
 720         return(ctx->default_verify_callback);
 721         }
 722
 723 void SSL_set_verify(SSL *s,int mode,
 724                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 725         {
 726         s->verify_mode=mode;
 727         if (callback != NULL)
 728                 s->verify_callback=callback;
 729         }
 730
 731 void SSL_set_verify_depth(SSL *s,int depth)
 732         {
 733         X509_VERIFY_PARAM_set_depth(s->param, depth);
 734         }
 735
 736 void SSL_set_read_ahead(SSL *s,int yes)
 737         {
 738         s->read_ahead=yes;
 739         }
 740
 741 int SSL_get_read_ahead(const SSL *s)
 742         {
 743         return(s->read_ahead);
 744         }
 745
 746 int SSL_pending(const SSL *s)
 747         {
 748         /* SSL_pending cannot work properly if read-ahead is enabled
 749          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 750          * and it is impossible to fix since SSL_pending cannot report
 751          * errors that may be observed while scanning the new data.
 752          * (Note that SSL_pending() is often used as a boolean value,
 753          * so we'd better not return -1.)
 754          */
 755         return(s->method->ssl_pending(s));
 756         }
 757
 758 X509 *SSL_get_peer_certificate(const SSL *s)
 759         {
 760         X509 *r;
 761
 762         if ((s == NULL) || (s->session == NULL))
 763                 r=NULL;
 764         else
 765                 r=s->session->peer;
 766
 767         if (r == NULL) return(r);
 768
 769         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 770
 771         return(r);
 772         }
 773
 774 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 775         {
 776         STACK_OF(X509) *r;
 777
 778         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 779                 r=NULL;
 780         else
 781                 r=s->session->sess_cert->cert_chain;
 782
 783         /* If we are a client, cert_chain includes the peer's own
 784          * certificate; if we are a server, it does not. */
 785
 786         return(r);
 787         }
 788
 789 /* Now in theory, since the calling process own 't' it should be safe to
 790  * modify.  We need to be able to read f without being hassled */
 791 void SSL_copy_session_id(SSL *t,const SSL *f)
 792         {
 793         CERT *tmp;
 794
 795         /* Do we need to to SSL locking? */
 796         SSL_set_session(t,SSL_get_session(f));
 797
 798         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 799          * vice-versa */
 800         if (t->method != f->method)
 801                 {
 802                 t->method->ssl_free(t); /* cleanup current */
 803                 t->method=f->method;    /* change method */
 804                 t->method->ssl_new(t);  /* setup new */
 805                 }
 806
 807         tmp=t->cert;
 808         if (f->cert != NULL)
 809                 {
 810                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 811                 t->cert=f->cert;
 812                 }
 813         else
 814                 t->cert=NULL;
 815         if (tmp != NULL) ssl_cert_free(tmp);
 816         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 817         }
 818
 819 /* Fix this so it checks all the valid key/cert options */
 820 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 821         {
 822         if (    (ctx == NULL) ||
 823                 (ctx->cert == NULL) ||
 824                 (ctx->cert->key->x509 == NULL))
 825                 {
 826                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 827                 return(0);
 828                 }
 829         if      (ctx->cert->key->privatekey == NULL)
 830                 {
 831                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 832                 return(0);
 833                 }
 834         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 835         }
 836
 837 /* Fix this function so that it takes an optional type parameter */
 838 int SSL_check_private_key(const SSL *ssl)
 839         {
 840         if (ssl == NULL)
 841                 {
 842                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 843                 return(0);
 844                 }
 845         if (ssl->cert == NULL)
 846                 {
 847                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 848                 return 0;
 849                 }
 850         if (ssl->cert->key->x509 == NULL)
 851                 {
 852                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 853                 return(0);
 854                 }
 855         if (ssl->cert->key->privatekey == NULL)
 856                 {
 857                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 858                 return(0);
 859                 }
 860         return(X509_check_private_key(ssl->cert->key->x509,
 861                 ssl->cert->key->privatekey));
 862         }
 863
 864 int SSL_accept(SSL *s)
 865         {
 866         if (s->handshake_func == 0)
 867                 /* Not properly initialized yet */
 868                 SSL_set_accept_state(s);
 869
 870         return(s->method->ssl_accept(s));
 871         }
 872
 873 int SSL_connect(SSL *s)
 874         {
 875         if (s->handshake_func == 0)
 876                 /* Not properly initialized yet */
 877                 SSL_set_connect_state(s);
 878
 879         return(s->method->ssl_connect(s));
 880         }
 881
 882 long SSL_get_default_timeout(const SSL *s)
 883         {
 884         return(s->method->get_timeout());
 885         }
 886
 887 int SSL_read(SSL *s,void *buf,int num)
 888         {
 889         if (s->handshake_func == 0)
 890                 {
 891                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 892                 return -1;
 893                 }
 894
 895         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 896                 {
 897                 s->rwstate=SSL_NOTHING;
 898                 return(0);
 899                 }
 900         return(s->method->ssl_read(s,buf,num));
 901         }
 902
 903 int SSL_peek(SSL *s,void *buf,int num)
 904         {
 905         if (s->handshake_func == 0)
 906                 {
 907                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 908                 return -1;
 909                 }
 910
 911         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 912                 {
 913                 return(0);
 914                 }
 915         return(s->method->ssl_peek(s,buf,num));
 916         }
 917
 918 int SSL_write(SSL *s,const void *buf,int num)
 919         {
 920         if (s->handshake_func == 0)
 921                 {
 922                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 923                 return -1;
 924                 }
 925
 926         if (s->shutdown & SSL_SENT_SHUTDOWN)
 927                 {
 928                 s->rwstate=SSL_NOTHING;
 929                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 930                 return(-1);
 931                 }
 932         return(s->method->ssl_write(s,buf,num));
 933         }
 934
 935 int SSL_shutdown(SSL *s)
 936         {
 937         /* Note that this function behaves differently from what one might
 938          * expect.  Return values are 0 for no success (yet),
 939          * 1 for success; but calling it once is usually not enough,
 940          * even if blocking I/O is used (see ssl3_shutdown).
 941          */
 942
 943         if (s->handshake_func == 0)
 944                 {
 945                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 946                 return -1;
 947                 }
 948
 949         if ((s != NULL) && !SSL_in_init(s))
 950                 return(s->method->ssl_shutdown(s));
 951         else
 952                 return(1);
 953         }
 954
 955 int SSL_renegotiate(SSL *s)
 956         {
 957         if (s->new_session == 0)
 958                 {
 959                 s->new_session=1;
 960                 }
 961         return(s->method->ssl_renegotiate(s));
 962         }
 963
 964 int SSL_renegotiate_pending(SSL *s)
 965         {
 966         /* becomes true when negotiation is requested;
 967          * false again once a handshake has finished */
 968         return (s->new_session != 0);
 969         }
 970
 971 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
 972         {
 973         long l;
 974
 975         switch (cmd)
 976                 {
 977         case SSL_CTRL_GET_READ_AHEAD:
 978                 return(s->read_ahead);
 979         case SSL_CTRL_SET_READ_AHEAD:
 980                 l=s->read_ahead;
 981                 s->read_ahead=larg;
 982                 return(l);
 983
 984         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
 985                 s->msg_callback_arg = parg;
 986                 return 1;
 987
 988         case SSL_CTRL_OPTIONS:
 989                 return(s->options|=larg);
 990         case SSL_CTRL_CLEAR_OPTIONS:
 991                 return(s->options&=~larg);
 992         case SSL_CTRL_MODE:
 993                 return(s->mode|=larg);
 994         case SSL_CTRL_CLEAR_MODE:
 995                 return(s->mode &=~larg);
 996         case SSL_CTRL_GET_MAX_CERT_LIST:
 997                 return(s->max_cert_list);
 998         case SSL_CTRL_SET_MAX_CERT_LIST:
 999                 l=s->max_cert_list;
1000                 s->max_cert_list=larg;
1001                 return(l);
1002         case SSL_CTRL_SET_MTU:
1003 #ifndef OPENSSL_NO_DTLS1
1004                 if (larg < (long)dtls1_min_mtu())
1005                         return 0;
1006 #endif
1007
1008                 if (SSL_version(s) == DTLS1_VERSION ||
1009                     SSL_version(s) == DTLS1_BAD_VER)
1010                         {
1011                         s->d1->mtu = larg;
1012                         return larg;
1013                         }
1014                 return 0;
1015         case SSL_CTRL_GET_RI_SUPPORT:
1016                 if (s->s3)
1017                         return s->s3->send_connection_binding;
1018                 else return 0;
1019         default:
1020                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1021                 }
1022         }
1023
1024 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1025         {
1026         switch(cmd)
1027                 {
1028         case SSL_CTRL_SET_MSG_CALLBACK:
1029                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1030                 return 1;
1031
1032         default:
1033                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1034                 }
1035         }
1036
1037 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
1038         {
1039         return ctx->sessions;
1040         }
1041
1042 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1043         {
1044         long l;
1045
1046         switch (cmd)
1047                 {
1048         case SSL_CTRL_GET_READ_AHEAD:
1049                 return(ctx->read_ahead);
1050         case SSL_CTRL_SET_READ_AHEAD:
1051                 l=ctx->read_ahead;
1052                 ctx->read_ahead=larg;
1053                 return(l);
1054
1055         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1056                 ctx->msg_callback_arg = parg;
1057                 return 1;
1058
1059         case SSL_CTRL_GET_MAX_CERT_LIST:
1060                 return(ctx->max_cert_list);
1061         case SSL_CTRL_SET_MAX_CERT_LIST:
1062                 l=ctx->max_cert_list;
1063                 ctx->max_cert_list=larg;
1064                 return(l);
1065
1066         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1067                 l=ctx->session_cache_size;
1068                 ctx->session_cache_size=larg;
1069                 return(l);
1070         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1071                 return(ctx->session_cache_size);
1072         case SSL_CTRL_SET_SESS_CACHE_MODE:
1073                 l=ctx->session_cache_mode;
1074                 ctx->session_cache_mode=larg;
1075                 return(l);
1076         case SSL_CTRL_GET_SESS_CACHE_MODE:
1077                 return(ctx->session_cache_mode);
1078
1079         case SSL_CTRL_SESS_NUMBER:
1080                 return(ctx->sessions->num_items);
1081         case SSL_CTRL_SESS_CONNECT:
1082                 return(ctx->stats.sess_connect);
1083         case SSL_CTRL_SESS_CONNECT_GOOD:
1084                 return(ctx->stats.sess_connect_good);
1085         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1086                 return(ctx->stats.sess_connect_renegotiate);
1087         case SSL_CTRL_SESS_ACCEPT:
1088                 return(ctx->stats.sess_accept);
1089         case SSL_CTRL_SESS_ACCEPT_GOOD:
1090                 return(ctx->stats.sess_accept_good);
1091         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1092                 return(ctx->stats.sess_accept_renegotiate);
1093         case SSL_CTRL_SESS_HIT:
1094                 return(ctx->stats.sess_hit);
1095         case SSL_CTRL_SESS_CB_HIT:
1096                 return(ctx->stats.sess_cb_hit);
1097         case SSL_CTRL_SESS_MISSES:
1098                 return(ctx->stats.sess_miss);
1099         case SSL_CTRL_SESS_TIMEOUTS:
1100                 return(ctx->stats.sess_timeout);
1101         case SSL_CTRL_SESS_CACHE_FULL:
1102                 return(ctx->stats.sess_cache_full);
1103         case SSL_CTRL_OPTIONS:
1104                 return(ctx->options|=larg);
1105         case SSL_CTRL_CLEAR_OPTIONS:
1106                 return(ctx->options&=~larg);
1107         case SSL_CTRL_MODE:
1108                 return(ctx->mode|=larg);
1109         case SSL_CTRL_CLEAR_MODE:
1110                 return(ctx->mode&=~larg);
1111         default:
1112                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1113                 }
1114         }
1115
1116 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1117         {
1118         switch(cmd)
1119                 {
1120         case SSL_CTRL_SET_MSG_CALLBACK:
1121                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1122                 return 1;
1123
1124         default:
1125                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1126                 }
1127         }
1128
1129 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1130         {
1131         long l;
1132
1133         l=a->id-b->id;
1134         if (l == 0L)
1135                 return(0);
1136         else
1137                 return((l > 0)?1:-1);
1138         }
1139
1140 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1141                         const SSL_CIPHER * const *bp)
1142         {
1143         long l;
1144
1145         l=(*ap)->id-(*bp)->id;
1146         if (l == 0L)
1147                 return(0);
1148         else
1149                 return((l > 0)?1:-1);
1150         }
1151
1152 /** return a STACK of the ciphers available for the SSL and in order of
1153  * preference */
1154 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1155         {
1156         if (s != NULL)
1157                 {
1158                 if (s->cipher_list != NULL)
1159                         {
1160                         return(s->cipher_list);
1161                         }
1162                 else if ((s->ctx != NULL) &&
1163                         (s->ctx->cipher_list != NULL))
1164                         {
1165                         return(s->ctx->cipher_list);
1166                         }
1167                 }
1168         return(NULL);
1169         }
1170
1171 /** return a STACK of the ciphers available for the SSL and in order of
1172  * algorithm id */
1173 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1174         {
1175         if (s != NULL)
1176                 {
1177                 if (s->cipher_list_by_id != NULL)
1178                         {
1179                         return(s->cipher_list_by_id);
1180                         }
1181                 else if ((s->ctx != NULL) &&
1182                         (s->ctx->cipher_list_by_id != NULL))
1183                         {
1184                         return(s->ctx->cipher_list_by_id);
1185                         }
1186                 }
1187         return(NULL);
1188         }
1189
1190 /** The old interface to get the same thing as SSL_get_ciphers() */
1191 const char *SSL_get_cipher_list(const SSL *s,int n)
1192         {
1193         SSL_CIPHER *c;
1194         STACK_OF(SSL_CIPHER) *sk;
1195
1196         if (s == NULL) return(NULL);
1197         sk=SSL_get_ciphers(s);
1198         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1199                 return(NULL);
1200         c=sk_SSL_CIPHER_value(sk,n);
1201         if (c == NULL) return(NULL);
1202         return(c->name);
1203         }
1204
1205 /** specify the ciphers to be used by default by the SSL_CTX */
1206 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1207         {
1208         STACK_OF(SSL_CIPHER) *sk;
1209
1210         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1211                 &ctx->cipher_list_by_id,str);
1212         /* ssl_create_cipher_list may return an empty stack if it
1213          * was unable to find a cipher matching the given rule string
1214          * (for example if the rule string specifies a cipher which
1215          * has been disabled). This is not an error as far as
1216          * ssl_create_cipher_list is concerned, and hence
1217          * ctx->cipher_list and ctx->cipher_list_by_id has been
1218          * updated. */
1219         if (sk == NULL)
1220                 return 0;
1221         else if (sk_SSL_CIPHER_num(sk) == 0)
1222                 {
1223                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1224                 return 0;
1225                 }
1226         return 1;
1227         }
1228
1229 /** specify the ciphers to be used by the SSL */
1230 int SSL_set_cipher_list(SSL *s,const char *str)
1231         {
1232         STACK_OF(SSL_CIPHER) *sk;
1233
1234         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1235                 &s->cipher_list_by_id,str);
1236         /* see comment in SSL_CTX_set_cipher_list */
1237         if (sk == NULL)
1238                 return 0;
1239         else if (sk_SSL_CIPHER_num(sk) == 0)
1240                 {
1241                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1242                 return 0;
1243                 }
1244         return 1;
1245         }
1246
1247 /* works well for SSLv2, not so good for SSLv3 */
1248 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1249         {
1250         char *p;
1251         STACK_OF(SSL_CIPHER) *sk;
1252         SSL_CIPHER *c;
1253         int i;
1254
1255         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1256                 (len < 2))
1257                 return(NULL);
1258
1259         p=buf;
1260         sk=s->session->ciphers;
1261
1262         if (sk_SSL_CIPHER_num(sk) == 0)
1263                 return NULL;
1264
1265         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1266                 {
1267                 int n;
1268
1269                 c=sk_SSL_CIPHER_value(sk,i);
1270                 n=strlen(c->name);
1271                 if (n+1 > len)
1272                         {
1273                         if (p != buf)
1274                                 --p;
1275                         *p='\0';
1276                         return buf;
1277                         }
1278                 strcpy(p,c->name);
1279                 p+=n;
1280                 *(p++)=':';
1281                 len-=n+1;
1282                 }
1283         p[-1]='\0';
1284         return(buf);
1285         }
1286
1287 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1288                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1289         {
1290         int i,j=0;
1291         SSL_CIPHER *c;
1292         unsigned char *q;
1293 #ifndef OPENSSL_NO_KRB5
1294         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1295 #endif /* OPENSSL_NO_KRB5 */
1296
1297         if (sk == NULL) return(0);
1298         q=p;
1299         if (put_cb == NULL)
1300                 put_cb = s->method->put_cipher_by_char;
1301
1302         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1303                 {
1304                 c=sk_SSL_CIPHER_value(sk,i);
1305 #ifndef OPENSSL_NO_KRB5
1306                 if ((c->algorithms & SSL_KRB5) && nokrb5)
1307                     continue;
1308 #endif /* OPENSSL_NO_KRB5 */
1309
1310                 j = put_cb(c,p);
1311                 p+=j;
1312                 }
1313         /* If p == q, no ciphers; caller indicates an error.
1314          * Otherwise, add applicable SCSVs. */
1315         if (p != q)
1316                 {
1317                 if (!s->new_session)
1318                         {
1319                         static SSL_CIPHER scsv =
1320                                 {
1321                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0,
1322                                 };
1323                         j = put_cb(&scsv,p);
1324                         p+=j;
1325 #ifdef OPENSSL_RI_DEBUG
1326                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1327 #endif
1328                         }
1329
1330                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1331                         {
1332                         static SSL_CIPHER scsv =
1333                                 {
1334                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0,
1335                                 };
1336                         j = put_cb(&scsv,p);
1337                         p+=j;
1338                         }
1339                 }
1340
1341         return(p-q);
1342         }
1343
1344 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1345                                                STACK_OF(SSL_CIPHER) **skp)
1346         {
1347         SSL_CIPHER *c;
1348         STACK_OF(SSL_CIPHER) *sk;
1349         int i,n;
1350
1351         if (s->s3)
1352                 s->s3->send_connection_binding = 0;
1353
1354         n=ssl_put_cipher_by_char(s,NULL,NULL);
1355         if (n == 0 || (num%n) != 0)
1356                 {
1357                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1358                 return(NULL);
1359                 }
1360         if ((skp == NULL) || (*skp == NULL))
1361                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1362         else
1363                 {
1364                 sk= *skp;
1365                 sk_SSL_CIPHER_zero(sk);
1366                 }
1367
1368         for (i=0; i<num; i+=n)
1369                 {
1370                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1371                 if (s->s3 && (n != 3 || !p[0]) &&
1372                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1373                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1374                         {
1375                         /* SCSV fatal if renegotiating */
1376                         if (s->new_session)
1377                                 {
1378                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1379                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1380                                 goto err;
1381                                 }
1382                         s->s3->send_connection_binding = 1;
1383                         p += n;
1384 #ifdef OPENSSL_RI_DEBUG
1385                         fprintf(stderr, "SCSV received by server\n");
1386 #endif
1387                         continue;
1388                         }
1389
1390                 /* Check for TLS_FALLBACK_SCSV */
1391                 if ((n != 3 || !p[0]) &&
1392                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1393                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1394                         {
1395                         /* The SCSV indicates that the client previously tried a higher version.
1396                          * Fail if the current version is an unexpected downgrade. */
1397                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1398                                 {
1399                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1400                                 if (s->s3)
1401                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1402                                 goto err;
1403                                 }
1404                         continue;
1405                         }
1406
1407                 c=ssl_get_cipher_by_char(s,p);
1408                 p+=n;
1409                 if (c != NULL)
1410                         {
1411                         if (!sk_SSL_CIPHER_push(sk,c))
1412                                 {
1413                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1414                                 goto err;
1415                                 }
1416                         }
1417                 }
1418
1419         if (skp != NULL)
1420                 *skp=sk;
1421         return(sk);
1422 err:
1423         if ((skp == NULL) || (*skp == NULL))
1424                 sk_SSL_CIPHER_free(sk);
1425         return(NULL);
1426         }
1427
1428 #ifndef OPENSSL_NO_TLSEXT
1429 /** return a servername extension value if provided in Client Hello, or NULL.
1430  * So far, only host_name types are defined (RFC 3546).
1431  */
1432
1433 const char *SSL_get_servername(const SSL *s, const int type)
1434         {
1435         if (type != TLSEXT_NAMETYPE_host_name)
1436                 return NULL;
1437
1438         return s->session && !s->tlsext_hostname ?
1439                 s->session->tlsext_hostname :
1440                 s->tlsext_hostname;
1441         }
1442
1443 int SSL_get_servername_type(const SSL *s)
1444         {
1445         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1446                 return TLSEXT_NAMETYPE_host_name;
1447         return -1;
1448         }
1449 #endif
1450
1451 unsigned long SSL_SESSION_hash(const SSL_SESSION *a)
1452         {
1453         unsigned long l;
1454
1455         l=(unsigned long)
1456                 ((unsigned int) a->session_id[0]     )|
1457                 ((unsigned int) a->session_id[1]<< 8L)|
1458                 ((unsigned long)a->session_id[2]<<16L)|
1459                 ((unsigned long)a->session_id[3]<<24L);
1460         return(l);
1461         }
1462
1463 /* NB: If this function (or indeed the hash function which uses a sort of
1464  * coarser function than this one) is changed, ensure
1465  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1466  * able to construct an SSL_SESSION that will collide with any existing session
1467  * with a matching session ID. */
1468 int SSL_SESSION_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1469         {
1470         if (a->ssl_version != b->ssl_version)
1471                 return(1);
1472         if (a->session_id_length != b->session_id_length)
1473                 return(1);
1474         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1475         }
1476
1477 /* These wrapper functions should remain rather than redeclaring
1478  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1479  * variable. The reason is that the functions aren't static, they're exposed via
1480  * ssl.h. */
1481 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1482 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1483
1484 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1485         {
1486         SSL_CTX *ret=NULL;
1487
1488         if (meth == NULL)
1489                 {
1490                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1491                 return(NULL);
1492                 }
1493
1494 #ifdef OPENSSL_FIPS
1495         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1496                 {
1497                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1498                 return NULL;
1499                 }
1500 #endif
1501
1502         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1503                 {
1504                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1505                 goto err;
1506                 }
1507         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1508         if (ret == NULL)
1509                 goto err;
1510
1511         memset(ret,0,sizeof(SSL_CTX));
1512
1513         ret->method=meth;
1514
1515         ret->cert_store=NULL;
1516         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1517         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1518         ret->session_cache_head=NULL;
1519         ret->session_cache_tail=NULL;
1520
1521         /* We take the system default */
1522         ret->session_timeout=meth->get_timeout();
1523
1524         ret->new_session_cb=0;
1525         ret->remove_session_cb=0;
1526         ret->get_session_cb=0;
1527         ret->generate_session_id=0;
1528
1529         memset((char *)&ret->stats,0,sizeof(ret->stats));
1530
1531         ret->references=1;
1532         ret->quiet_shutdown=0;
1533
1534 /*      ret->cipher=NULL;*/
1535 /*      ret->s2->challenge=NULL;
1536         ret->master_key=NULL;
1537         ret->key_arg=NULL;
1538         ret->s2->conn_id=NULL; */
1539
1540         ret->info_callback=NULL;
1541
1542         ret->app_verify_callback=0;
1543         ret->app_verify_arg=NULL;
1544
1545         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1546         ret->read_ahead=0;
1547         ret->msg_callback=0;
1548         ret->msg_callback_arg=NULL;
1549         ret->verify_mode=SSL_VERIFY_NONE;
1550 #if 0
1551         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1552 #endif
1553         ret->sid_ctx_length=0;
1554         ret->default_verify_callback=NULL;
1555         if ((ret->cert=ssl_cert_new()) == NULL)
1556                 goto err;
1557
1558         ret->default_passwd_callback=0;
1559         ret->default_passwd_callback_userdata=NULL;
1560         ret->client_cert_cb=0;
1561         ret->app_gen_cookie_cb=0;
1562         ret->app_verify_cookie_cb=0;
1563
1564         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1565                         LHASH_COMP_FN(SSL_SESSION_cmp));
1566         if (ret->sessions == NULL) goto err;
1567         ret->cert_store=X509_STORE_new();
1568         if (ret->cert_store == NULL) goto err;
1569
1570         ssl_create_cipher_list(ret->method,
1571                 &ret->cipher_list,&ret->cipher_list_by_id,
1572                 SSL_DEFAULT_CIPHER_LIST);
1573         if (ret->cipher_list == NULL
1574             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1575                 {
1576                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1577                 goto err2;
1578                 }
1579
1580         ret->param = X509_VERIFY_PARAM_new();
1581         if (!ret->param)
1582                 goto err;
1583
1584         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1585                 {
1586                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1587                 goto err2;
1588                 }
1589         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1590                 {
1591                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1592                 goto err2;
1593                 }
1594         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1595                 {
1596                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1597                 goto err2;
1598                 }
1599
1600         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1601                 goto err;
1602
1603         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1604
1605         ret->extra_certs=NULL;
1606         /* No compression for DTLS */
1607         if (meth->version != DTLS1_VERSION)
1608                 ret->comp_methods=SSL_COMP_get_compression_methods();
1609
1610 #ifndef OPENSSL_NO_TLSEXT
1611         ret->tlsext_servername_callback = 0;
1612         ret->tlsext_servername_arg = NULL;
1613         /* Setup RFC4507 ticket keys */
1614         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1615                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1616                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1617                 ret->options |= SSL_OP_NO_TICKET;
1618
1619         ret->tlsext_status_cb = 0;
1620         ret->tlsext_status_arg = NULL;
1621
1622 #endif
1623
1624 #ifndef OPENSSL_NO_ENGINE
1625         ret->client_cert_engine = NULL;
1626 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1627 #define eng_strx(x)     #x
1628 #define eng_str(x)      eng_strx(x)
1629         /* Use specific client engine automatically... ignore errors */
1630         {
1631         ENGINE *eng;
1632         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1633         if (!eng)
1634                 {
1635                 ERR_clear_error();
1636                 ENGINE_load_builtin_engines();
1637                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1638                 }
1639         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1640                 ERR_clear_error();
1641         }
1642 #endif
1643 #endif
1644         /* Default is to connect to non-RI servers. When RI is more widely
1645          * deployed might change this.
1646          */
1647         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1648
1649         return(ret);
1650 err:
1651         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1652 err2:
1653         if (ret != NULL) SSL_CTX_free(ret);
1654         return(NULL);
1655         }
1656
1657 #if 0
1658 static void SSL_COMP_free(SSL_COMP *comp)
1659     { OPENSSL_free(comp); }
1660 #endif
1661
1662 void SSL_CTX_free(SSL_CTX *a)
1663         {
1664         int i;
1665
1666         if (a == NULL) return;
1667
1668         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1669 #ifdef REF_PRINT
1670         REF_PRINT("SSL_CTX",a);
1671 #endif
1672         if (i > 0) return;
1673 #ifdef REF_CHECK
1674         if (i < 0)
1675                 {
1676                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1677                 abort(); /* ok */
1678                 }
1679 #endif
1680
1681         if (a->param)
1682                 X509_VERIFY_PARAM_free(a->param);
1683
1684         /*
1685          * Free internal session cache. However: the remove_cb() may reference
1686          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1687          * after the sessions were flushed.
1688          * As the ex_data handling routines might also touch the session cache,
1689          * the most secure solution seems to be: empty (flush) the cache, then
1690          * free ex_data, then finally free the cache.
1691          * (See ticket [openssl.org #212].)
1692          */
1693         if (a->sessions != NULL)
1694                 SSL_CTX_flush_sessions(a,0);
1695
1696         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1697
1698         if (a->sessions != NULL)
1699                 lh_free(a->sessions);
1700
1701         if (a->cert_store != NULL)
1702                 X509_STORE_free(a->cert_store);
1703         if (a->cipher_list != NULL)
1704                 sk_SSL_CIPHER_free(a->cipher_list);
1705         if (a->cipher_list_by_id != NULL)
1706                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1707         if (a->cert != NULL)
1708                 ssl_cert_free(a->cert);
1709         if (a->client_CA != NULL)
1710                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1711         if (a->extra_certs != NULL)
1712                 sk_X509_pop_free(a->extra_certs,X509_free);
1713 #if 0 /* This should never be done, since it removes a global database */
1714         if (a->comp_methods != NULL)
1715                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1716 #else
1717         a->comp_methods = NULL;
1718 #endif
1719 #ifndef OPENSSL_NO_ENGINE
1720         if (a->client_cert_engine)
1721                 ENGINE_finish(a->client_cert_engine);
1722 #endif
1723         OPENSSL_free(a);
1724         }
1725
1726 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1727         {
1728         ctx->default_passwd_callback=cb;
1729         }
1730
1731 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1732         {
1733         ctx->default_passwd_callback_userdata=u;
1734         }
1735
1736 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1737         {
1738         ctx->app_verify_callback=cb;
1739         ctx->app_verify_arg=arg;
1740         }
1741
1742 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1743         {
1744         ctx->verify_mode=mode;
1745         ctx->default_verify_callback=cb;
1746         }
1747
1748 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1749         {
1750         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1751         }
1752
1753 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1754         {
1755         CERT_PKEY *cpk;
1756         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1757         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1758         int rsa_tmp_export,dh_tmp_export,kl;
1759         unsigned long mask,emask;
1760         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1761 #ifndef OPENSSL_NO_ECDH
1762         int have_ecdh_tmp;
1763 #endif
1764         X509 *x = NULL;
1765         EVP_PKEY *ecc_pkey = NULL;
1766         int signature_nid = 0;
1767
1768         if (c == NULL) return;
1769
1770         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1771
1772 #ifndef OPENSSL_NO_RSA
1773         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1774         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1775                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1776 #else
1777         rsa_tmp=rsa_tmp_export=0;
1778 #endif
1779 #ifndef OPENSSL_NO_DH
1780         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1781         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1782                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1783 #else
1784         dh_tmp=dh_tmp_export=0;
1785 #endif
1786
1787 #ifndef OPENSSL_NO_ECDH
1788         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1789 #endif
1790         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1791         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1792         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1793         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1794         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1795         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1796         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1797         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1798         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1799         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1800         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1801 /* FIX THIS EAY EAY EAY */
1802         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1803         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1804         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1805         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1806         mask=0;
1807         emask=0;
1808
1809 #ifdef CIPHER_DEBUG
1810         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1811                 rsa_tmp,rsa_tmp_export,dh_tmp,
1812                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1813 #endif
1814
1815         if (rsa_enc || (rsa_tmp && rsa_sign))
1816                 mask|=SSL_kRSA;
1817         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1818                 emask|=SSL_kRSA;
1819
1820 #if 0
1821         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1822         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1823                 (rsa_enc || rsa_sign || dsa_sign))
1824                 mask|=SSL_kEDH;
1825         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1826                 (rsa_enc || rsa_sign || dsa_sign))
1827                 emask|=SSL_kEDH;
1828 #endif
1829
1830         if (dh_tmp_export)
1831                 emask|=SSL_kEDH;
1832
1833         if (dh_tmp)
1834                 mask|=SSL_kEDH;
1835
1836         if (dh_rsa) mask|=SSL_kDHr;
1837         if (dh_rsa_export) emask|=SSL_kDHr;
1838
1839         if (dh_dsa) mask|=SSL_kDHd;
1840         if (dh_dsa_export) emask|=SSL_kDHd;
1841
1842         if (rsa_enc || rsa_sign)
1843                 {
1844                 mask|=SSL_aRSA;
1845                 emask|=SSL_aRSA;
1846                 }
1847
1848         if (dsa_sign)
1849                 {
1850                 mask|=SSL_aDSS;
1851                 emask|=SSL_aDSS;
1852                 }
1853
1854         mask|=SSL_aNULL;
1855         emask|=SSL_aNULL;
1856
1857 #ifndef OPENSSL_NO_KRB5
1858         mask|=SSL_kKRB5|SSL_aKRB5;
1859         emask|=SSL_kKRB5|SSL_aKRB5;
1860 #endif
1861
1862         /* An ECC certificate may be usable for ECDH and/or
1863          * ECDSA cipher suites depending on the key usage extension.
1864          */
1865         if (have_ecc_cert)
1866                 {
1867                 /* This call populates extension flags (ex_flags) */
1868                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1869                 X509_check_purpose(x, -1, 0);
1870                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1871                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1872                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1873                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1874                 ecc_pkey = X509_get_pubkey(x);
1875                 ecc_pkey_size = (ecc_pkey != NULL) ?
1876                     EVP_PKEY_bits(ecc_pkey) : 0;
1877                 EVP_PKEY_free(ecc_pkey);
1878                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1879                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1880 #ifndef OPENSSL_NO_ECDH
1881                 if (ecdh_ok)
1882                         {
1883                         if ((signature_nid == NID_md5WithRSAEncryption) ||
1884                             (signature_nid == NID_md4WithRSAEncryption) ||
1885                             (signature_nid == NID_md2WithRSAEncryption))
1886                                 {
1887                                 mask|=SSL_kECDH|SSL_aRSA;
1888                                 if (ecc_pkey_size <= 163)
1889                                         emask|=SSL_kECDH|SSL_aRSA;
1890                                 }
1891                         if (signature_nid == NID_ecdsa_with_SHA1)
1892                                 {
1893                                 mask|=SSL_kECDH|SSL_aECDSA;
1894                                 if (ecc_pkey_size <= 163)
1895                                         emask|=SSL_kECDH|SSL_aECDSA;
1896                                 }
1897                         }
1898 #endif
1899 #ifndef OPENSSL_NO_ECDSA
1900                 if (ecdsa_ok)
1901                         {
1902                         mask|=SSL_aECDSA;
1903                         emask|=SSL_aECDSA;
1904                         }
1905 #endif
1906                 }
1907
1908 #ifndef OPENSSL_NO_ECDH
1909         if (have_ecdh_tmp)
1910                 {
1911                 mask|=SSL_kECDHE;
1912                 emask|=SSL_kECDHE;
1913                 }
1914 #endif
1915         c->mask=mask;
1916         c->export_mask=emask;
1917         c->valid=1;
1918         }
1919
1920 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1921 #define ku_reject(x, usage) \
1922         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1923
1924 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1925         {
1926         unsigned long alg = cs->algorithms;
1927         EVP_PKEY *pkey = NULL;
1928         int keysize = 0;
1929         int signature_nid = 0;
1930
1931         if (SSL_C_IS_EXPORT(cs))
1932                 {
1933                 /* ECDH key length in export ciphers must be <= 163 bits */
1934                 pkey = X509_get_pubkey(x);
1935                 if (pkey == NULL) return 0;
1936                 keysize = EVP_PKEY_bits(pkey);
1937                 EVP_PKEY_free(pkey);
1938                 if (keysize > 163) return 0;
1939                 }
1940
1941         /* This call populates the ex_flags field correctly */
1942         X509_check_purpose(x, -1, 0);
1943         if ((x->sig_alg) && (x->sig_alg->algorithm))
1944                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1945         if (alg & SSL_kECDH)
1946                 {
1947                 /* key usage, if present, must allow key agreement */
1948                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1949                         {
1950                         return 0;
1951                         }
1952                 if (alg & SSL_aECDSA)
1953                         {
1954                         /* signature alg must be ECDSA */
1955                         if (signature_nid != NID_ecdsa_with_SHA1)
1956                                 {
1957                                 return 0;
1958                                 }
1959                         }
1960                 if (alg & SSL_aRSA)
1961                         {
1962                         /* signature alg must be RSA */
1963                         if ((signature_nid != NID_md5WithRSAEncryption) &&
1964                             (signature_nid != NID_md4WithRSAEncryption) &&
1965                             (signature_nid != NID_md2WithRSAEncryption))
1966                                 {
1967                                 return 0;
1968                                 }
1969                         }
1970                 }
1971         else if (alg & SSL_aECDSA)
1972                 {
1973                 /* key usage, if present, must allow signing */
1974                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1975                         {
1976                         return 0;
1977                         }
1978                 }
1979
1980         return 1;  /* all checks are ok */
1981         }
1982
1983 /* THIS NEEDS CLEANING UP */
1984 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
1985         {
1986         unsigned long alg,kalg;
1987         CERT *c;
1988         int i;
1989
1990         c=s->cert;
1991         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1992         alg=s->s3->tmp.new_cipher->algorithms;
1993         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1994
1995         if (kalg & SSL_kECDH)
1996                 {
1997                 /* we don't need to look at SSL_kECDHE
1998                  * since no certificate is needed for
1999                  * anon ECDH and for authenticated
2000                  * ECDHE, the check for the auth
2001                  * algorithm will set i correctly
2002                  * NOTE: For ECDH-RSA, we need an ECC
2003                  * not an RSA cert but for ECDHE-RSA
2004                  * we need an RSA cert. Placing the
2005                  * checks for SSL_kECDH before RSA
2006                  * checks ensures the correct cert is chosen.
2007                  */
2008                 i=SSL_PKEY_ECC;
2009                 }
2010         else if (kalg & SSL_aECDSA)
2011                 {
2012                 i=SSL_PKEY_ECC;
2013                 }
2014         else if (kalg & SSL_kDHr)
2015                 i=SSL_PKEY_DH_RSA;
2016         else if (kalg & SSL_kDHd)
2017                 i=SSL_PKEY_DH_DSA;
2018         else if (kalg & SSL_aDSS)
2019                 i=SSL_PKEY_DSA_SIGN;
2020         else if (kalg & SSL_aRSA)
2021                 {
2022                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2023                         i=SSL_PKEY_RSA_SIGN;
2024                 else
2025                         i=SSL_PKEY_RSA_ENC;
2026                 }
2027         else if (kalg & SSL_aKRB5)
2028                 {
2029                 /* VRS something else here? */
2030                 return(NULL);
2031                 }
2032         else /* if (kalg & SSL_aNULL) */
2033                 {
2034                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2035                 return(NULL);
2036                 }
2037
2038         return c->pkeys + i;
2039         }
2040
2041 X509 *ssl_get_server_send_cert(const SSL *s)
2042         {
2043         CERT_PKEY *cpk;
2044         cpk = ssl_get_server_send_pkey(s);
2045         if (!cpk)
2046                 return NULL;
2047         return cpk->x509;
2048         }
2049
2050 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
2051         {
2052         unsigned long alg;
2053         CERT *c;
2054
2055         alg=cipher->algorithms;
2056         c=s->cert;
2057
2058         if ((alg & SSL_aDSS) &&
2059                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2060                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2061         else if (alg & SSL_aRSA)
2062                 {
2063                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2064                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2065                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2066                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2067                 else
2068                         return(NULL);
2069                 }
2070         else if ((alg & SSL_aECDSA) &&
2071                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2072                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2073         else /* if (alg & SSL_aNULL) */
2074                 {
2075                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2076                 return(NULL);
2077                 }
2078         }
2079
2080 void ssl_update_cache(SSL *s,int mode)
2081         {
2082         int i;
2083
2084         /* If the session_id_length is 0, we are not supposed to cache it,
2085          * and it would be rather hard to do anyway :-) */
2086         if (s->session->session_id_length == 0) return;
2087
2088         i=s->ctx->session_cache_mode;
2089         if ((i & mode) && (!s->hit)
2090                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2091                     || SSL_CTX_add_session(s->ctx,s->session))
2092                 && (s->ctx->new_session_cb != NULL))
2093                 {
2094                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2095                 if (!s->ctx->new_session_cb(s,s->session))
2096                         SSL_SESSION_free(s->session);
2097                 }
2098
2099         /* auto flush every 255 connections */
2100         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2101                 ((i & mode) == mode))
2102                 {
2103                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2104                         ?s->ctx->stats.sess_connect_good
2105                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
2106                         {
2107                         SSL_CTX_flush_sessions(s->ctx,(unsigned long)time(NULL));
2108                         }
2109                 }
2110         }
2111
2112 SSL_METHOD *SSL_get_ssl_method(SSL *s)
2113         {
2114         return(s->method);
2115         }
2116
2117 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
2118         {
2119         int conn= -1;
2120         int ret=1;
2121
2122         if (s->method != meth)
2123                 {
2124                 if (s->handshake_func != NULL)
2125                         conn=(s->handshake_func == s->method->ssl_connect);
2126
2127                 if (s->method->version == meth->version)
2128                         s->method=meth;
2129                 else
2130                         {
2131                         s->method->ssl_free(s);
2132                         s->method=meth;
2133                         ret=s->method->ssl_new(s);
2134                         }
2135
2136                 if (conn == 1)
2137                         s->handshake_func=meth->ssl_connect;
2138                 else if (conn == 0)
2139                         s->handshake_func=meth->ssl_accept;
2140                 }
2141         return(ret);
2142         }
2143
2144 int SSL_get_error(const SSL *s,int i)
2145         {
2146         int reason;
2147         unsigned long l;
2148         BIO *bio;
2149
2150         if (i > 0) return(SSL_ERROR_NONE);
2151
2152         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2153          * etc, where we do encode the error */
2154         if ((l=ERR_peek_error()) != 0)
2155                 {
2156                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2157                         return(SSL_ERROR_SYSCALL);
2158                 else
2159                         return(SSL_ERROR_SSL);
2160                 }
2161
2162         if ((i < 0) && SSL_want_read(s))
2163                 {
2164                 bio=SSL_get_rbio(s);
2165                 if (BIO_should_read(bio))
2166                         return(SSL_ERROR_WANT_READ);
2167                 else if (BIO_should_write(bio))
2168                         /* This one doesn't make too much sense ... We never try
2169                          * to write to the rbio, and an application program where
2170                          * rbio and wbio are separate couldn't even know what it
2171                          * should wait for.
2172                          * However if we ever set s->rwstate incorrectly
2173                          * (so that we have SSL_want_read(s) instead of
2174                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2175                          * this test works around that bug; so it might be safer
2176                          * to keep it. */
2177                         return(SSL_ERROR_WANT_WRITE);
2178                 else if (BIO_should_io_special(bio))
2179                         {
2180                         reason=BIO_get_retry_reason(bio);
2181                         if (reason == BIO_RR_CONNECT)
2182                                 return(SSL_ERROR_WANT_CONNECT);
2183                         else if (reason == BIO_RR_ACCEPT)
2184                                 return(SSL_ERROR_WANT_ACCEPT);
2185                         else
2186                                 return(SSL_ERROR_SYSCALL); /* unknown */
2187                         }
2188                 }
2189
2190         if ((i < 0) && SSL_want_write(s))
2191                 {
2192                 bio=SSL_get_wbio(s);
2193                 if (BIO_should_write(bio))
2194                         return(SSL_ERROR_WANT_WRITE);
2195                 else if (BIO_should_read(bio))
2196                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2197                         return(SSL_ERROR_WANT_READ);
2198                 else if (BIO_should_io_special(bio))
2199                         {
2200                         reason=BIO_get_retry_reason(bio);
2201                         if (reason == BIO_RR_CONNECT)
2202                                 return(SSL_ERROR_WANT_CONNECT);
2203                         else if (reason == BIO_RR_ACCEPT)
2204                                 return(SSL_ERROR_WANT_ACCEPT);
2205                         else
2206                                 return(SSL_ERROR_SYSCALL);
2207                         }
2208                 }
2209         if ((i < 0) && SSL_want_x509_lookup(s))
2210                 {
2211                 return(SSL_ERROR_WANT_X509_LOOKUP);
2212                 }
2213
2214         if (i == 0)
2215                 {
2216                 if (s->version == SSL2_VERSION)
2217                         {
2218                         /* assume it is the socket being closed */
2219                         return(SSL_ERROR_ZERO_RETURN);
2220                         }
2221                 else
2222                         {
2223                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2224                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2225                                 return(SSL_ERROR_ZERO_RETURN);
2226                         }
2227                 }
2228         return(SSL_ERROR_SYSCALL);
2229         }
2230
2231 int SSL_do_handshake(SSL *s)
2232         {
2233         int ret=1;
2234
2235         if (s->handshake_func == NULL)
2236                 {
2237                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2238                 return(-1);
2239                 }
2240
2241         s->method->ssl_renegotiate_check(s);
2242
2243         if (SSL_in_init(s) || SSL_in_before(s))
2244                 {
2245                 ret=s->handshake_func(s);
2246                 }
2247         return(ret);
2248         }
2249
2250 /* For the next 2 functions, SSL_clear() sets shutdown and so
2251  * one of these calls will reset it */
2252 void SSL_set_accept_state(SSL *s)
2253         {
2254         s->server=1;
2255         s->shutdown=0;
2256         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2257         s->handshake_func=s->method->ssl_accept;
2258         /* clear the current cipher */
2259         ssl_clear_cipher_ctx(s);
2260         }
2261
2262 void SSL_set_connect_state(SSL *s)
2263         {
2264         s->server=0;
2265         s->shutdown=0;
2266         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2267         s->handshake_func=s->method->ssl_connect;
2268         /* clear the current cipher */
2269         ssl_clear_cipher_ctx(s);
2270         }
2271
2272 int ssl_undefined_function(SSL *s)
2273         {
2274         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2275         return(0);
2276         }
2277
2278 int ssl_undefined_void_function(void)
2279         {
2280         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2281         return(0);
2282         }
2283
2284 int ssl_undefined_const_function(const SSL *s)
2285         {
2286         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2287         return(0);
2288         }
2289
2290 SSL_METHOD *ssl_bad_method(int ver)
2291         {
2292         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2293         return(NULL);
2294         }
2295
2296 const char *SSL_get_version(const SSL *s)
2297         {
2298         if (s->version == TLS1_VERSION)
2299                 return("TLSv1");
2300         else if (s->version == SSL3_VERSION)
2301                 return("SSLv3");
2302         else if (s->version == SSL2_VERSION)
2303                 return("SSLv2");
2304         else
2305                 return("unknown");
2306         }
2307
2308 SSL *SSL_dup(SSL *s)
2309         {
2310         STACK_OF(X509_NAME) *sk;
2311         X509_NAME *xn;
2312         SSL *ret;
2313         int i;
2314
2315         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2316             return(NULL);
2317
2318         ret->version = s->version;
2319         ret->type = s->type;
2320         ret->method = s->method;
2321
2322         if (s->session != NULL)
2323                 {
2324                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2325                 SSL_copy_session_id(ret,s);
2326                 }
2327         else
2328                 {
2329                 /* No session has been established yet, so we have to expect
2330                  * that s->cert or ret->cert will be changed later --
2331                  * they should not both point to the same object,
2332                  * and thus we can't use SSL_copy_session_id. */
2333
2334                 ret->method->ssl_free(ret);
2335                 ret->method = s->method;
2336                 ret->method->ssl_new(ret);
2337
2338                 if (s->cert != NULL)
2339                         {
2340                         if (ret->cert != NULL)
2341                                 {
2342                                 ssl_cert_free(ret->cert);
2343                                 }
2344                         ret->cert = ssl_cert_dup(s->cert);
2345                         if (ret->cert == NULL)
2346                                 goto err;
2347                         }
2348
2349                 SSL_set_session_id_context(ret,
2350                         s->sid_ctx, s->sid_ctx_length);
2351                 }
2352
2353         ret->options=s->options;
2354         ret->mode=s->mode;
2355         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2356         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2357         ret->msg_callback = s->msg_callback;
2358         ret->msg_callback_arg = s->msg_callback_arg;
2359         SSL_set_verify(ret,SSL_get_verify_mode(s),
2360                 SSL_get_verify_callback(s));
2361         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2362         ret->generate_session_id = s->generate_session_id;
2363
2364         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2365
2366         ret->debug=s->debug;
2367
2368         /* copy app data, a little dangerous perhaps */
2369         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2370                 goto err;
2371
2372         /* setup rbio, and wbio */
2373         if (s->rbio != NULL)
2374                 {
2375                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2376                         goto err;
2377                 }
2378         if (s->wbio != NULL)
2379                 {
2380                 if (s->wbio != s->rbio)
2381                         {
2382                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2383                                 goto err;
2384                         }
2385                 else
2386                         ret->wbio=ret->rbio;
2387                 }
2388         ret->rwstate = s->rwstate;
2389         ret->in_handshake = s->in_handshake;
2390         ret->handshake_func = s->handshake_func;
2391         ret->server = s->server;
2392         ret->new_session = s->new_session;
2393         ret->quiet_shutdown = s->quiet_shutdown;
2394         ret->shutdown=s->shutdown;
2395         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2396         ret->rstate=s->rstate;
2397         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2398         ret->hit=s->hit;
2399
2400         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2401
2402         /* dup the cipher_list and cipher_list_by_id stacks */
2403         if (s->cipher_list != NULL)
2404                 {
2405                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2406                         goto err;
2407                 }
2408         if (s->cipher_list_by_id != NULL)
2409                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2410                         == NULL)
2411                         goto err;
2412
2413         /* Dup the client_CA list */
2414         if (s->client_CA != NULL)
2415                 {
2416                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2417                 ret->client_CA=sk;
2418                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2419                         {
2420                         xn=sk_X509_NAME_value(sk,i);
2421                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2422                                 {
2423                                 X509_NAME_free(xn);
2424                                 goto err;
2425                                 }
2426                         }
2427                 }
2428
2429         if (0)
2430                 {
2431 err:
2432                 if (ret != NULL) SSL_free(ret);
2433                 ret=NULL;
2434                 }
2435         return(ret);
2436         }
2437
2438 void ssl_clear_cipher_ctx(SSL *s)
2439         {
2440         if (s->enc_read_ctx != NULL)
2441                 {
2442                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2443                 OPENSSL_free(s->enc_read_ctx);
2444                 s->enc_read_ctx=NULL;
2445                 }
2446         if (s->enc_write_ctx != NULL)
2447                 {
2448                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2449                 OPENSSL_free(s->enc_write_ctx);
2450                 s->enc_write_ctx=NULL;
2451                 }
2452 #ifndef OPENSSL_NO_COMP
2453         if (s->expand != NULL)
2454                 {
2455                 COMP_CTX_free(s->expand);
2456                 s->expand=NULL;
2457                 }
2458         if (s->compress != NULL)
2459                 {
2460                 COMP_CTX_free(s->compress);
2461                 s->compress=NULL;
2462                 }
2463 #endif
2464         }
2465
2466 /* Fix this function so that it takes an optional type parameter */
2467 X509 *SSL_get_certificate(const SSL *s)
2468         {
2469         if (s->cert != NULL)
2470                 return(s->cert->key->x509);
2471         else
2472                 return(NULL);
2473         }
2474
2475 /* Fix this function so that it takes an optional type parameter */
2476 EVP_PKEY *SSL_get_privatekey(SSL *s)
2477         {
2478         if (s->cert != NULL)
2479                 return(s->cert->key->privatekey);
2480         else
2481                 return(NULL);
2482         }
2483
2484 SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2485         {
2486         if ((s->session != NULL) && (s->session->cipher != NULL))
2487                 return(s->session->cipher);
2488         return(NULL);
2489         }
2490 #ifdef OPENSSL_NO_COMP
2491 const void *SSL_get_current_compression(SSL *s)
2492         {
2493         return NULL;
2494         }
2495 const void *SSL_get_current_expansion(SSL *s)
2496         {
2497         return NULL;
2498         }
2499 #else
2500
2501 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2502         {
2503         if (s->compress != NULL)
2504                 return(s->compress->meth);
2505         return(NULL);
2506         }
2507
2508 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2509         {
2510         if (s->expand != NULL)
2511                 return(s->expand->meth);
2512         return(NULL);
2513         }
2514 #endif
2515
2516 int ssl_init_wbio_buffer(SSL *s,int push)
2517         {
2518         BIO *bbio;
2519
2520         if (s->bbio == NULL)
2521                 {
2522                 bbio=BIO_new(BIO_f_buffer());
2523                 if (bbio == NULL) return(0);
2524                 s->bbio=bbio;
2525                 }
2526         else
2527                 {
2528                 bbio=s->bbio;
2529                 if (s->bbio == s->wbio)
2530                         s->wbio=BIO_pop(s->wbio);
2531                 }
2532         (void)BIO_reset(bbio);
2533 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2534         if (!BIO_set_read_buffer_size(bbio,1))
2535                 {
2536                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2537                 return(0);
2538                 }
2539         if (push)
2540                 {
2541                 if (s->wbio != bbio)
2542                         s->wbio=BIO_push(bbio,s->wbio);
2543                 }
2544         else
2545                 {
2546                 if (s->wbio == bbio)
2547                         s->wbio=BIO_pop(bbio);
2548                 }
2549         return(1);
2550         }
2551
2552 void ssl_free_wbio_buffer(SSL *s)
2553         {
2554         if (s->bbio == NULL) return;
2555
2556         if (s->bbio == s->wbio)
2557                 {
2558                 /* remove buffering */
2559                 s->wbio=BIO_pop(s->wbio);
2560 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2561                 assert(s->wbio != NULL);
2562 #endif
2563         }
2564         BIO_free(s->bbio);
2565         s->bbio=NULL;
2566         }
2567
2568 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2569         {
2570         ctx->quiet_shutdown=mode;
2571         }
2572
2573 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2574         {
2575         return(ctx->quiet_shutdown);
2576         }
2577
2578 void SSL_set_quiet_shutdown(SSL *s,int mode)
2579         {
2580         s->quiet_shutdown=mode;
2581         }
2582
2583 int SSL_get_quiet_shutdown(const SSL *s)
2584         {
2585         return(s->quiet_shutdown);
2586         }
2587
2588 void SSL_set_shutdown(SSL *s,int mode)
2589         {
2590         s->shutdown=mode;
2591         }
2592
2593 int SSL_get_shutdown(const SSL *s)
2594         {
2595         return(s->shutdown);
2596         }
2597
2598 int SSL_version(const SSL *s)
2599         {
2600         return(s->version);
2601         }
2602
2603 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2604         {
2605         return(ssl->ctx);
2606         }
2607
2608 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2609         {
2610         if (ssl->ctx == ctx)
2611                 return ssl->ctx;
2612 #ifndef OPENSSL_NO_TLSEXT
2613         if (ctx == NULL)
2614                 ctx = ssl->initial_ctx;
2615 #endif
2616         if (ssl->cert != NULL)
2617                 ssl_cert_free(ssl->cert);
2618         ssl->cert = ssl_cert_dup(ctx->cert);
2619         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2620         if (ssl->ctx != NULL)
2621                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2622         ssl->ctx = ctx;
2623         return(ssl->ctx);
2624         }
2625
2626 #ifndef OPENSSL_NO_STDIO
2627 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2628         {
2629         return(X509_STORE_set_default_paths(ctx->cert_store));
2630         }
2631
2632 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2633                 const char *CApath)
2634         {
2635         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2636         }
2637 #endif
2638
2639 void SSL_set_info_callback(SSL *ssl,
2640         void (*cb)(const SSL *ssl,int type,int val))
2641         {
2642         ssl->info_callback=cb;
2643         }
2644
2645 /* One compiler (Diab DCC) doesn't like argument names in returned
2646    function pointer.  */
2647 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2648         {
2649         return ssl->info_callback;
2650         }
2651
2652 int SSL_state(const SSL *ssl)
2653         {
2654         return(ssl->state);
2655         }
2656
2657 void SSL_set_verify_result(SSL *ssl,long arg)
2658         {
2659         ssl->verify_result=arg;
2660         }
2661
2662 long SSL_get_verify_result(const SSL *ssl)
2663         {
2664         return(ssl->verify_result);
2665         }
2666
2667 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2668                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2669         {
2670         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2671                                 new_func, dup_func, free_func);
2672         }
2673
2674 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2675         {
2676         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2677         }
2678
2679 void *SSL_get_ex_data(const SSL *s,int idx)
2680         {
2681         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2682         }
2683
2684 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2685                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2686         {
2687         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2688                                 new_func, dup_func, free_func);
2689         }
2690
2691 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2692         {
2693         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2694         }
2695
2696 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2697         {
2698         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2699         }
2700
2701 int ssl_ok(SSL *s)
2702         {
2703         return(1);
2704         }
2705
2706 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2707         {
2708         return(ctx->cert_store);
2709         }
2710
2711 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2712         {
2713         if (ctx->cert_store != NULL)
2714                 X509_STORE_free(ctx->cert_store);
2715         ctx->cert_store=store;
2716         }
2717
2718 int SSL_want(const SSL *s)
2719         {
2720         return(s->rwstate);
2721         }
2722
2723 /*!
2724  * \brief Set the callback for generating temporary RSA keys.
2725  * \param ctx the SSL context.
2726  * \param cb the callback
2727  */
2728
2729 #ifndef OPENSSL_NO_RSA
2730 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2731                                                           int is_export,
2732                                                           int keylength))
2733     {
2734     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2735     }
2736
2737 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2738                                                   int is_export,
2739                                                   int keylength))
2740     {
2741     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2742     }
2743 #endif
2744
2745 #ifdef DOXYGEN
2746 /*!
2747  * \brief The RSA temporary key callback function.
2748  * \param ssl the SSL session.
2749  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2750  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2751  * of the required key in bits.
2752  * \return the temporary RSA key.
2753  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2754  */
2755
2756 RSA *cb(SSL *ssl,int is_export,int keylength)
2757     {}
2758 #endif
2759
2760 /*!
2761  * \brief Set the callback for generating temporary DH keys.
2762  * \param ctx the SSL context.
2763  * \param dh the callback
2764  */
2765
2766 #ifndef OPENSSL_NO_DH
2767 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2768                                                         int keylength))
2769         {
2770         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2771         }
2772
2773 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2774                                                 int keylength))
2775         {
2776         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2777         }
2778 #endif
2779
2780 #ifndef OPENSSL_NO_ECDH
2781 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2782                                                         int keylength))
2783         {
2784         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2785         }
2786
2787 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2788                                                 int keylength))
2789         {
2790         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2791         }
2792 #endif
2793
2794
2795 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))
2796         {
2797         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2798         }
2799 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))
2800         {
2801         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2802         }
2803
2804
2805
2806 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2807 #include "../crypto/bio/bss_file.c"
2808 #endif
2809
2810 IMPLEMENT_STACK_OF(SSL_CIPHER)
2811 IMPLEMENT_STACK_OF(SSL_COMP)