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                         p += n;
1405                         continue;
1406                         }
1407
1408                 c=ssl_get_cipher_by_char(s,p);
1409                 p+=n;
1410                 if (c != NULL)
1411                         {
1412                         if (!sk_SSL_CIPHER_push(sk,c))
1413                                 {
1414                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1415                                 goto err;
1416                                 }
1417                         }
1418                 }
1419
1420         if (skp != NULL)
1421                 *skp=sk;
1422         return(sk);
1423 err:
1424         if ((skp == NULL) || (*skp == NULL))
1425                 sk_SSL_CIPHER_free(sk);
1426         return(NULL);
1427         }
1428
1429 #ifndef OPENSSL_NO_TLSEXT
1430 /** return a servername extension value if provided in Client Hello, or NULL.
1431  * So far, only host_name types are defined (RFC 3546).
1432  */
1433
1434 const char *SSL_get_servername(const SSL *s, const int type)
1435         {
1436         if (type != TLSEXT_NAMETYPE_host_name)
1437                 return NULL;
1438
1439         return s->session && !s->tlsext_hostname ?
1440                 s->session->tlsext_hostname :
1441                 s->tlsext_hostname;
1442         }
1443
1444 int SSL_get_servername_type(const SSL *s)
1445         {
1446         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1447                 return TLSEXT_NAMETYPE_host_name;
1448         return -1;
1449         }
1450 #endif
1451
1452 unsigned long SSL_SESSION_hash(const SSL_SESSION *a)
1453         {
1454         unsigned long l;
1455
1456         l=(unsigned long)
1457                 ((unsigned int) a->session_id[0]     )|
1458                 ((unsigned int) a->session_id[1]<< 8L)|
1459                 ((unsigned long)a->session_id[2]<<16L)|
1460                 ((unsigned long)a->session_id[3]<<24L);
1461         return(l);
1462         }
1463
1464 /* NB: If this function (or indeed the hash function which uses a sort of
1465  * coarser function than this one) is changed, ensure
1466  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1467  * able to construct an SSL_SESSION that will collide with any existing session
1468  * with a matching session ID. */
1469 int SSL_SESSION_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1470         {
1471         if (a->ssl_version != b->ssl_version)
1472                 return(1);
1473         if (a->session_id_length != b->session_id_length)
1474                 return(1);
1475         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1476         }
1477
1478 /* These wrapper functions should remain rather than redeclaring
1479  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1480  * variable. The reason is that the functions aren't static, they're exposed via
1481  * ssl.h. */
1482 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1483 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1484
1485 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1486         {
1487         SSL_CTX *ret=NULL;
1488
1489         if (meth == NULL)
1490                 {
1491                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1492                 return(NULL);
1493                 }
1494
1495 #ifdef OPENSSL_FIPS
1496         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1497                 {
1498                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1499                 return NULL;
1500                 }
1501 #endif
1502
1503         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1504                 {
1505                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1506                 goto err;
1507                 }
1508         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1509         if (ret == NULL)
1510                 goto err;
1511
1512         memset(ret,0,sizeof(SSL_CTX));
1513
1514         ret->method=meth;
1515
1516         ret->cert_store=NULL;
1517         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1518         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1519         ret->session_cache_head=NULL;
1520         ret->session_cache_tail=NULL;
1521
1522         /* We take the system default */
1523         ret->session_timeout=meth->get_timeout();
1524
1525         ret->new_session_cb=0;
1526         ret->remove_session_cb=0;
1527         ret->get_session_cb=0;
1528         ret->generate_session_id=0;
1529
1530         memset((char *)&ret->stats,0,sizeof(ret->stats));
1531
1532         ret->references=1;
1533         ret->quiet_shutdown=0;
1534
1535 /*      ret->cipher=NULL;*/
1536 /*      ret->s2->challenge=NULL;
1537         ret->master_key=NULL;
1538         ret->key_arg=NULL;
1539         ret->s2->conn_id=NULL; */
1540
1541         ret->info_callback=NULL;
1542
1543         ret->app_verify_callback=0;
1544         ret->app_verify_arg=NULL;
1545
1546         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1547         ret->read_ahead=0;
1548         ret->msg_callback=0;
1549         ret->msg_callback_arg=NULL;
1550         ret->verify_mode=SSL_VERIFY_NONE;
1551 #if 0
1552         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1553 #endif
1554         ret->sid_ctx_length=0;
1555         ret->default_verify_callback=NULL;
1556         if ((ret->cert=ssl_cert_new()) == NULL)
1557                 goto err;
1558
1559         ret->default_passwd_callback=0;
1560         ret->default_passwd_callback_userdata=NULL;
1561         ret->client_cert_cb=0;
1562         ret->app_gen_cookie_cb=0;
1563         ret->app_verify_cookie_cb=0;
1564
1565         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1566                         LHASH_COMP_FN(SSL_SESSION_cmp));
1567         if (ret->sessions == NULL) goto err;
1568         ret->cert_store=X509_STORE_new();
1569         if (ret->cert_store == NULL) goto err;
1570
1571         ssl_create_cipher_list(ret->method,
1572                 &ret->cipher_list,&ret->cipher_list_by_id,
1573                 SSL_DEFAULT_CIPHER_LIST);
1574         if (ret->cipher_list == NULL
1575             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1576                 {
1577                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1578                 goto err2;
1579                 }
1580
1581         ret->param = X509_VERIFY_PARAM_new();
1582         if (!ret->param)
1583                 goto err;
1584
1585         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1586                 {
1587                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1588                 goto err2;
1589                 }
1590         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1591                 {
1592                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1593                 goto err2;
1594                 }
1595         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1596                 {
1597                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1598                 goto err2;
1599                 }
1600
1601         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1602                 goto err;
1603
1604         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1605
1606         ret->extra_certs=NULL;
1607         /* No compression for DTLS */
1608         if (meth->version != DTLS1_VERSION)
1609                 ret->comp_methods=SSL_COMP_get_compression_methods();
1610
1611 #ifndef OPENSSL_NO_TLSEXT
1612         ret->tlsext_servername_callback = 0;
1613         ret->tlsext_servername_arg = NULL;
1614         /* Setup RFC4507 ticket keys */
1615         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1616                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1617                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1618                 ret->options |= SSL_OP_NO_TICKET;
1619
1620         ret->tlsext_status_cb = 0;
1621         ret->tlsext_status_arg = NULL;
1622
1623 #endif
1624
1625 #ifndef OPENSSL_NO_ENGINE
1626         ret->client_cert_engine = NULL;
1627 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1628 #define eng_strx(x)     #x
1629 #define eng_str(x)      eng_strx(x)
1630         /* Use specific client engine automatically... ignore errors */
1631         {
1632         ENGINE *eng;
1633         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1634         if (!eng)
1635                 {
1636                 ERR_clear_error();
1637                 ENGINE_load_builtin_engines();
1638                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1639                 }
1640         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1641                 ERR_clear_error();
1642         }
1643 #endif
1644 #endif
1645         /* Default is to connect to non-RI servers. When RI is more widely
1646          * deployed might change this.
1647          */
1648         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1649
1650         return(ret);
1651 err:
1652         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1653 err2:
1654         if (ret != NULL) SSL_CTX_free(ret);
1655         return(NULL);
1656         }
1657
1658 #if 0
1659 static void SSL_COMP_free(SSL_COMP *comp)
1660     { OPENSSL_free(comp); }
1661 #endif
1662
1663 void SSL_CTX_free(SSL_CTX *a)
1664         {
1665         int i;
1666
1667         if (a == NULL) return;
1668
1669         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1670 #ifdef REF_PRINT
1671         REF_PRINT("SSL_CTX",a);
1672 #endif
1673         if (i > 0) return;
1674 #ifdef REF_CHECK
1675         if (i < 0)
1676                 {
1677                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1678                 abort(); /* ok */
1679                 }
1680 #endif
1681
1682         if (a->param)
1683                 X509_VERIFY_PARAM_free(a->param);
1684
1685         /*
1686          * Free internal session cache. However: the remove_cb() may reference
1687          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1688          * after the sessions were flushed.
1689          * As the ex_data handling routines might also touch the session cache,
1690          * the most secure solution seems to be: empty (flush) the cache, then
1691          * free ex_data, then finally free the cache.
1692          * (See ticket [openssl.org #212].)
1693          */
1694         if (a->sessions != NULL)
1695                 SSL_CTX_flush_sessions(a,0);
1696
1697         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1698
1699         if (a->sessions != NULL)
1700                 lh_free(a->sessions);
1701
1702         if (a->cert_store != NULL)
1703                 X509_STORE_free(a->cert_store);
1704         if (a->cipher_list != NULL)
1705                 sk_SSL_CIPHER_free(a->cipher_list);
1706         if (a->cipher_list_by_id != NULL)
1707                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1708         if (a->cert != NULL)
1709                 ssl_cert_free(a->cert);
1710         if (a->client_CA != NULL)
1711                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1712         if (a->extra_certs != NULL)
1713                 sk_X509_pop_free(a->extra_certs,X509_free);
1714 #if 0 /* This should never be done, since it removes a global database */
1715         if (a->comp_methods != NULL)
1716                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1717 #else
1718         a->comp_methods = NULL;
1719 #endif
1720 #ifndef OPENSSL_NO_ENGINE
1721         if (a->client_cert_engine)
1722                 ENGINE_finish(a->client_cert_engine);
1723 #endif
1724         OPENSSL_free(a);
1725         }
1726
1727 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1728         {
1729         ctx->default_passwd_callback=cb;
1730         }
1731
1732 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1733         {
1734         ctx->default_passwd_callback_userdata=u;
1735         }
1736
1737 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1738         {
1739         ctx->app_verify_callback=cb;
1740         ctx->app_verify_arg=arg;
1741         }
1742
1743 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1744         {
1745         ctx->verify_mode=mode;
1746         ctx->default_verify_callback=cb;
1747         }
1748
1749 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1750         {
1751         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1752         }
1753
1754 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1755         {
1756         CERT_PKEY *cpk;
1757         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1758         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1759         int rsa_tmp_export,dh_tmp_export,kl;
1760         unsigned long mask,emask;
1761         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1762 #ifndef OPENSSL_NO_ECDH
1763         int have_ecdh_tmp;
1764 #endif
1765         X509 *x = NULL;
1766         EVP_PKEY *ecc_pkey = NULL;
1767         int signature_nid = 0;
1768
1769         if (c == NULL) return;
1770
1771         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1772
1773 #ifndef OPENSSL_NO_RSA
1774         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1775         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1776                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1777 #else
1778         rsa_tmp=rsa_tmp_export=0;
1779 #endif
1780 #ifndef OPENSSL_NO_DH
1781         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1782         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1783                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1784 #else
1785         dh_tmp=dh_tmp_export=0;
1786 #endif
1787
1788 #ifndef OPENSSL_NO_ECDH
1789         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1790 #endif
1791         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1792         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1793         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1794         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1795         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1796         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1797         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1798         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1799         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1800         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1801         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1802 /* FIX THIS EAY EAY EAY */
1803         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1804         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1805         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1806         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1807         mask=0;
1808         emask=0;
1809
1810 #ifdef CIPHER_DEBUG
1811         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1812                 rsa_tmp,rsa_tmp_export,dh_tmp,
1813                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1814 #endif
1815
1816         if (rsa_enc || (rsa_tmp && rsa_sign))
1817                 mask|=SSL_kRSA;
1818         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1819                 emask|=SSL_kRSA;
1820
1821 #if 0
1822         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1823         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1824                 (rsa_enc || rsa_sign || dsa_sign))
1825                 mask|=SSL_kEDH;
1826         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1827                 (rsa_enc || rsa_sign || dsa_sign))
1828                 emask|=SSL_kEDH;
1829 #endif
1830
1831         if (dh_tmp_export)
1832                 emask|=SSL_kEDH;
1833
1834         if (dh_tmp)
1835                 mask|=SSL_kEDH;
1836
1837         if (dh_rsa) mask|=SSL_kDHr;
1838         if (dh_rsa_export) emask|=SSL_kDHr;
1839
1840         if (dh_dsa) mask|=SSL_kDHd;
1841         if (dh_dsa_export) emask|=SSL_kDHd;
1842
1843         if (rsa_enc || rsa_sign)
1844                 {
1845                 mask|=SSL_aRSA;
1846                 emask|=SSL_aRSA;
1847                 }
1848
1849         if (dsa_sign)
1850                 {
1851                 mask|=SSL_aDSS;
1852                 emask|=SSL_aDSS;
1853                 }
1854
1855         mask|=SSL_aNULL;
1856         emask|=SSL_aNULL;
1857
1858 #ifndef OPENSSL_NO_KRB5
1859         mask|=SSL_kKRB5|SSL_aKRB5;
1860         emask|=SSL_kKRB5|SSL_aKRB5;
1861 #endif
1862
1863         /* An ECC certificate may be usable for ECDH and/or
1864          * ECDSA cipher suites depending on the key usage extension.
1865          */
1866         if (have_ecc_cert)
1867                 {
1868                 /* This call populates extension flags (ex_flags) */
1869                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1870                 X509_check_purpose(x, -1, 0);
1871                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1872                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1873                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1874                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1875                 ecc_pkey = X509_get_pubkey(x);
1876                 ecc_pkey_size = (ecc_pkey != NULL) ?
1877                     EVP_PKEY_bits(ecc_pkey) : 0;
1878                 EVP_PKEY_free(ecc_pkey);
1879                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1880                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1881 #ifndef OPENSSL_NO_ECDH
1882                 if (ecdh_ok)
1883                         {
1884                         if ((signature_nid == NID_md5WithRSAEncryption) ||
1885                             (signature_nid == NID_md4WithRSAEncryption) ||
1886                             (signature_nid == NID_md2WithRSAEncryption))
1887                                 {
1888                                 mask|=SSL_kECDH|SSL_aRSA;
1889                                 if (ecc_pkey_size <= 163)
1890                                         emask|=SSL_kECDH|SSL_aRSA;
1891                                 }
1892                         if (signature_nid == NID_ecdsa_with_SHA1)
1893                                 {
1894                                 mask|=SSL_kECDH|SSL_aECDSA;
1895                                 if (ecc_pkey_size <= 163)
1896                                         emask|=SSL_kECDH|SSL_aECDSA;
1897                                 }
1898                         }
1899 #endif
1900 #ifndef OPENSSL_NO_ECDSA
1901                 if (ecdsa_ok)
1902                         {
1903                         mask|=SSL_aECDSA;
1904                         emask|=SSL_aECDSA;
1905                         }
1906 #endif
1907                 }
1908
1909 #ifndef OPENSSL_NO_ECDH
1910         if (have_ecdh_tmp)
1911                 {
1912                 mask|=SSL_kECDHE;
1913                 emask|=SSL_kECDHE;
1914                 }
1915 #endif
1916         c->mask=mask;
1917         c->export_mask=emask;
1918         c->valid=1;
1919         }
1920
1921 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1922 #define ku_reject(x, usage) \
1923         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1924
1925 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1926         {
1927         unsigned long alg = cs->algorithms;
1928         EVP_PKEY *pkey = NULL;
1929         int keysize = 0;
1930         int signature_nid = 0;
1931
1932         if (SSL_C_IS_EXPORT(cs))
1933                 {
1934                 /* ECDH key length in export ciphers must be <= 163 bits */
1935                 pkey = X509_get_pubkey(x);
1936                 if (pkey == NULL) return 0;
1937                 keysize = EVP_PKEY_bits(pkey);
1938                 EVP_PKEY_free(pkey);
1939                 if (keysize > 163) return 0;
1940                 }
1941
1942         /* This call populates the ex_flags field correctly */
1943         X509_check_purpose(x, -1, 0);
1944         if ((x->sig_alg) && (x->sig_alg->algorithm))
1945                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1946         if (alg & SSL_kECDH)
1947                 {
1948                 /* key usage, if present, must allow key agreement */
1949                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1950                         {
1951                         return 0;
1952                         }
1953                 if (alg & SSL_aECDSA)
1954                         {
1955                         /* signature alg must be ECDSA */
1956                         if (signature_nid != NID_ecdsa_with_SHA1)
1957                                 {
1958                                 return 0;
1959                                 }
1960                         }
1961                 if (alg & SSL_aRSA)
1962                         {
1963                         /* signature alg must be RSA */
1964                         if ((signature_nid != NID_md5WithRSAEncryption) &&
1965                             (signature_nid != NID_md4WithRSAEncryption) &&
1966                             (signature_nid != NID_md2WithRSAEncryption))
1967                                 {
1968                                 return 0;
1969                                 }
1970                         }
1971                 }
1972         else if (alg & SSL_aECDSA)
1973                 {
1974                 /* key usage, if present, must allow signing */
1975                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1976                         {
1977                         return 0;
1978                         }
1979                 }
1980
1981         return 1;  /* all checks are ok */
1982         }
1983
1984 /* THIS NEEDS CLEANING UP */
1985 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
1986         {
1987         unsigned long alg,kalg;
1988         CERT *c;
1989         int i;
1990
1991         c=s->cert;
1992         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1993         alg=s->s3->tmp.new_cipher->algorithms;
1994         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1995
1996         if (kalg & SSL_kECDH)
1997                 {
1998                 /* we don't need to look at SSL_kECDHE
1999                  * since no certificate is needed for
2000                  * anon ECDH and for authenticated
2001                  * ECDHE, the check for the auth
2002                  * algorithm will set i correctly
2003                  * NOTE: For ECDH-RSA, we need an ECC
2004                  * not an RSA cert but for ECDHE-RSA
2005                  * we need an RSA cert. Placing the
2006                  * checks for SSL_kECDH before RSA
2007                  * checks ensures the correct cert is chosen.
2008                  */
2009                 i=SSL_PKEY_ECC;
2010                 }
2011         else if (kalg & SSL_aECDSA)
2012                 {
2013                 i=SSL_PKEY_ECC;
2014                 }
2015         else if (kalg & SSL_kDHr)
2016                 i=SSL_PKEY_DH_RSA;
2017         else if (kalg & SSL_kDHd)
2018                 i=SSL_PKEY_DH_DSA;
2019         else if (kalg & SSL_aDSS)
2020                 i=SSL_PKEY_DSA_SIGN;
2021         else if (kalg & SSL_aRSA)
2022                 {
2023                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2024                         i=SSL_PKEY_RSA_SIGN;
2025                 else
2026                         i=SSL_PKEY_RSA_ENC;
2027                 }
2028         else if (kalg & SSL_aKRB5)
2029                 {
2030                 /* VRS something else here? */
2031                 return(NULL);
2032                 }
2033         else /* if (kalg & SSL_aNULL) */
2034                 {
2035                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2036                 return(NULL);
2037                 }
2038
2039         return c->pkeys + i;
2040         }
2041
2042 X509 *ssl_get_server_send_cert(const SSL *s)
2043         {
2044         CERT_PKEY *cpk;
2045         cpk = ssl_get_server_send_pkey(s);
2046         if (!cpk)
2047                 return NULL;
2048         return cpk->x509;
2049         }
2050
2051 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
2052         {
2053         unsigned long alg;
2054         CERT *c;
2055
2056         alg=cipher->algorithms;
2057         c=s->cert;
2058
2059         if ((alg & SSL_aDSS) &&
2060                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2061                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2062         else if (alg & SSL_aRSA)
2063                 {
2064                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2065                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2066                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2067                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2068                 else
2069                         return(NULL);
2070                 }
2071         else if ((alg & SSL_aECDSA) &&
2072                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2073                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2074         else /* if (alg & SSL_aNULL) */
2075                 {
2076                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2077                 return(NULL);
2078                 }
2079         }
2080
2081 void ssl_update_cache(SSL *s,int mode)
2082         {
2083         int i;
2084
2085         /* If the session_id_length is 0, we are not supposed to cache it,
2086          * and it would be rather hard to do anyway :-) */
2087         if (s->session->session_id_length == 0) return;
2088
2089         i=s->ctx->session_cache_mode;
2090         if ((i & mode) && (!s->hit)
2091                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2092                     || SSL_CTX_add_session(s->ctx,s->session))
2093                 && (s->ctx->new_session_cb != NULL))
2094                 {
2095                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2096                 if (!s->ctx->new_session_cb(s,s->session))
2097                         SSL_SESSION_free(s->session);
2098                 }
2099
2100         /* auto flush every 255 connections */
2101         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2102                 ((i & mode) == mode))
2103                 {
2104                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2105                         ?s->ctx->stats.sess_connect_good
2106                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
2107                         {
2108                         SSL_CTX_flush_sessions(s->ctx,(unsigned long)time(NULL));
2109                         }
2110                 }
2111         }
2112
2113 SSL_METHOD *SSL_get_ssl_method(SSL *s)
2114         {
2115         return(s->method);
2116         }
2117
2118 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
2119         {
2120         int conn= -1;
2121         int ret=1;
2122
2123         if (s->method != meth)
2124                 {
2125                 if (s->handshake_func != NULL)
2126                         conn=(s->handshake_func == s->method->ssl_connect);
2127
2128                 if (s->method->version == meth->version)
2129                         s->method=meth;
2130                 else
2131                         {
2132                         s->method->ssl_free(s);
2133                         s->method=meth;
2134                         ret=s->method->ssl_new(s);
2135                         }
2136
2137                 if (conn == 1)
2138                         s->handshake_func=meth->ssl_connect;
2139                 else if (conn == 0)
2140                         s->handshake_func=meth->ssl_accept;
2141                 }
2142         return(ret);
2143         }
2144
2145 int SSL_get_error(const SSL *s,int i)
2146         {
2147         int reason;
2148         unsigned long l;
2149         BIO *bio;
2150
2151         if (i > 0) return(SSL_ERROR_NONE);
2152
2153         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2154          * etc, where we do encode the error */
2155         if ((l=ERR_peek_error()) != 0)
2156                 {
2157                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2158                         return(SSL_ERROR_SYSCALL);
2159                 else
2160                         return(SSL_ERROR_SSL);
2161                 }
2162
2163         if ((i < 0) && SSL_want_read(s))
2164                 {
2165                 bio=SSL_get_rbio(s);
2166                 if (BIO_should_read(bio))
2167                         return(SSL_ERROR_WANT_READ);
2168                 else if (BIO_should_write(bio))
2169                         /* This one doesn't make too much sense ... We never try
2170                          * to write to the rbio, and an application program where
2171                          * rbio and wbio are separate couldn't even know what it
2172                          * should wait for.
2173                          * However if we ever set s->rwstate incorrectly
2174                          * (so that we have SSL_want_read(s) instead of
2175                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2176                          * this test works around that bug; so it might be safer
2177                          * to keep it. */
2178                         return(SSL_ERROR_WANT_WRITE);
2179                 else if (BIO_should_io_special(bio))
2180                         {
2181                         reason=BIO_get_retry_reason(bio);
2182                         if (reason == BIO_RR_CONNECT)
2183                                 return(SSL_ERROR_WANT_CONNECT);
2184                         else if (reason == BIO_RR_ACCEPT)
2185                                 return(SSL_ERROR_WANT_ACCEPT);
2186                         else
2187                                 return(SSL_ERROR_SYSCALL); /* unknown */
2188                         }
2189                 }
2190
2191         if ((i < 0) && SSL_want_write(s))
2192                 {
2193                 bio=SSL_get_wbio(s);
2194                 if (BIO_should_write(bio))
2195                         return(SSL_ERROR_WANT_WRITE);
2196                 else if (BIO_should_read(bio))
2197                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2198                         return(SSL_ERROR_WANT_READ);
2199                 else if (BIO_should_io_special(bio))
2200                         {
2201                         reason=BIO_get_retry_reason(bio);
2202                         if (reason == BIO_RR_CONNECT)
2203                                 return(SSL_ERROR_WANT_CONNECT);
2204                         else if (reason == BIO_RR_ACCEPT)
2205                                 return(SSL_ERROR_WANT_ACCEPT);
2206                         else
2207                                 return(SSL_ERROR_SYSCALL);
2208                         }
2209                 }
2210         if ((i < 0) && SSL_want_x509_lookup(s))
2211                 {
2212                 return(SSL_ERROR_WANT_X509_LOOKUP);
2213                 }
2214
2215         if (i == 0)
2216                 {
2217                 if (s->version == SSL2_VERSION)
2218                         {
2219                         /* assume it is the socket being closed */
2220                         return(SSL_ERROR_ZERO_RETURN);
2221                         }
2222                 else
2223                         {
2224                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2225                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2226                                 return(SSL_ERROR_ZERO_RETURN);
2227                         }
2228                 }
2229         return(SSL_ERROR_SYSCALL);
2230         }
2231
2232 int SSL_do_handshake(SSL *s)
2233         {
2234         int ret=1;
2235
2236         if (s->handshake_func == NULL)
2237                 {
2238                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2239                 return(-1);
2240                 }
2241
2242         s->method->ssl_renegotiate_check(s);
2243
2244         if (SSL_in_init(s) || SSL_in_before(s))
2245                 {
2246                 ret=s->handshake_func(s);
2247                 }
2248         return(ret);
2249         }
2250
2251 /* For the next 2 functions, SSL_clear() sets shutdown and so
2252  * one of these calls will reset it */
2253 void SSL_set_accept_state(SSL *s)
2254         {
2255         s->server=1;
2256         s->shutdown=0;
2257         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2258         s->handshake_func=s->method->ssl_accept;
2259         /* clear the current cipher */
2260         ssl_clear_cipher_ctx(s);
2261         }
2262
2263 void SSL_set_connect_state(SSL *s)
2264         {
2265         s->server=0;
2266         s->shutdown=0;
2267         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2268         s->handshake_func=s->method->ssl_connect;
2269         /* clear the current cipher */
2270         ssl_clear_cipher_ctx(s);
2271         }
2272
2273 int ssl_undefined_function(SSL *s)
2274         {
2275         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2276         return(0);
2277         }
2278
2279 int ssl_undefined_void_function(void)
2280         {
2281         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2282         return(0);
2283         }
2284
2285 int ssl_undefined_const_function(const SSL *s)
2286         {
2287         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2288         return(0);
2289         }
2290
2291 SSL_METHOD *ssl_bad_method(int ver)
2292         {
2293         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2294         return(NULL);
2295         }
2296
2297 const char *SSL_get_version(const SSL *s)
2298         {
2299         if (s->version == TLS1_VERSION)
2300                 return("TLSv1");
2301         else if (s->version == SSL3_VERSION)
2302                 return("SSLv3");
2303         else if (s->version == SSL2_VERSION)
2304                 return("SSLv2");
2305         else
2306                 return("unknown");
2307         }
2308
2309 SSL *SSL_dup(SSL *s)
2310         {
2311         STACK_OF(X509_NAME) *sk;
2312         X509_NAME *xn;
2313         SSL *ret;
2314         int i;
2315
2316         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2317             return(NULL);
2318
2319         ret->version = s->version;
2320         ret->type = s->type;
2321         ret->method = s->method;
2322
2323         if (s->session != NULL)
2324                 {
2325                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2326                 SSL_copy_session_id(ret,s);
2327                 }
2328         else
2329                 {
2330                 /* No session has been established yet, so we have to expect
2331                  * that s->cert or ret->cert will be changed later --
2332                  * they should not both point to the same object,
2333                  * and thus we can't use SSL_copy_session_id. */
2334
2335                 ret->method->ssl_free(ret);
2336                 ret->method = s->method;
2337                 ret->method->ssl_new(ret);
2338
2339                 if (s->cert != NULL)
2340                         {
2341                         if (ret->cert != NULL)
2342                                 {
2343                                 ssl_cert_free(ret->cert);
2344                                 }
2345                         ret->cert = ssl_cert_dup(s->cert);
2346                         if (ret->cert == NULL)
2347                                 goto err;
2348                         }
2349
2350                 SSL_set_session_id_context(ret,
2351                         s->sid_ctx, s->sid_ctx_length);
2352                 }
2353
2354         ret->options=s->options;
2355         ret->mode=s->mode;
2356         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2357         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2358         ret->msg_callback = s->msg_callback;
2359         ret->msg_callback_arg = s->msg_callback_arg;
2360         SSL_set_verify(ret,SSL_get_verify_mode(s),
2361                 SSL_get_verify_callback(s));
2362         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2363         ret->generate_session_id = s->generate_session_id;
2364
2365         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2366
2367         ret->debug=s->debug;
2368
2369         /* copy app data, a little dangerous perhaps */
2370         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2371                 goto err;
2372
2373         /* setup rbio, and wbio */
2374         if (s->rbio != NULL)
2375                 {
2376                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2377                         goto err;
2378                 }
2379         if (s->wbio != NULL)
2380                 {
2381                 if (s->wbio != s->rbio)
2382                         {
2383                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2384                                 goto err;
2385                         }
2386                 else
2387                         ret->wbio=ret->rbio;
2388                 }
2389         ret->rwstate = s->rwstate;
2390         ret->in_handshake = s->in_handshake;
2391         ret->handshake_func = s->handshake_func;
2392         ret->server = s->server;
2393         ret->new_session = s->new_session;
2394         ret->quiet_shutdown = s->quiet_shutdown;
2395         ret->shutdown=s->shutdown;
2396         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2397         ret->rstate=s->rstate;
2398         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2399         ret->hit=s->hit;
2400
2401         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2402
2403         /* dup the cipher_list and cipher_list_by_id stacks */
2404         if (s->cipher_list != NULL)
2405                 {
2406                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2407                         goto err;
2408                 }
2409         if (s->cipher_list_by_id != NULL)
2410                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2411                         == NULL)
2412                         goto err;
2413
2414         /* Dup the client_CA list */
2415         if (s->client_CA != NULL)
2416                 {
2417                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2418                 ret->client_CA=sk;
2419                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2420                         {
2421                         xn=sk_X509_NAME_value(sk,i);
2422                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2423                                 {
2424                                 X509_NAME_free(xn);
2425                                 goto err;
2426                                 }
2427                         }
2428                 }
2429
2430         if (0)
2431                 {
2432 err:
2433                 if (ret != NULL) SSL_free(ret);
2434                 ret=NULL;
2435                 }
2436         return(ret);
2437         }
2438
2439 void ssl_clear_cipher_ctx(SSL *s)
2440         {
2441         if (s->enc_read_ctx != NULL)
2442                 {
2443                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2444                 OPENSSL_free(s->enc_read_ctx);
2445                 s->enc_read_ctx=NULL;
2446                 }
2447         if (s->enc_write_ctx != NULL)
2448                 {
2449                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2450                 OPENSSL_free(s->enc_write_ctx);
2451                 s->enc_write_ctx=NULL;
2452                 }
2453 #ifndef OPENSSL_NO_COMP
2454         if (s->expand != NULL)
2455                 {
2456                 COMP_CTX_free(s->expand);
2457                 s->expand=NULL;
2458                 }
2459         if (s->compress != NULL)
2460                 {
2461                 COMP_CTX_free(s->compress);
2462                 s->compress=NULL;
2463                 }
2464 #endif
2465         }
2466
2467 /* Fix this function so that it takes an optional type parameter */
2468 X509 *SSL_get_certificate(const SSL *s)
2469         {
2470         if (s->cert != NULL)
2471                 return(s->cert->key->x509);
2472         else
2473                 return(NULL);
2474         }
2475
2476 /* Fix this function so that it takes an optional type parameter */
2477 EVP_PKEY *SSL_get_privatekey(SSL *s)
2478         {
2479         if (s->cert != NULL)
2480                 return(s->cert->key->privatekey);
2481         else
2482                 return(NULL);
2483         }
2484
2485 SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2486         {
2487         if ((s->session != NULL) && (s->session->cipher != NULL))
2488                 return(s->session->cipher);
2489         return(NULL);
2490         }
2491 #ifdef OPENSSL_NO_COMP
2492 const void *SSL_get_current_compression(SSL *s)
2493         {
2494         return NULL;
2495         }
2496 const void *SSL_get_current_expansion(SSL *s)
2497         {
2498         return NULL;
2499         }
2500 #else
2501
2502 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2503         {
2504         if (s->compress != NULL)
2505                 return(s->compress->meth);
2506         return(NULL);
2507         }
2508
2509 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2510         {
2511         if (s->expand != NULL)
2512                 return(s->expand->meth);
2513         return(NULL);
2514         }
2515 #endif
2516
2517 int ssl_init_wbio_buffer(SSL *s,int push)
2518         {
2519         BIO *bbio;
2520
2521         if (s->bbio == NULL)
2522                 {
2523                 bbio=BIO_new(BIO_f_buffer());
2524                 if (bbio == NULL) return(0);
2525                 s->bbio=bbio;
2526                 }
2527         else
2528                 {
2529                 bbio=s->bbio;
2530                 if (s->bbio == s->wbio)
2531                         s->wbio=BIO_pop(s->wbio);
2532                 }
2533         (void)BIO_reset(bbio);
2534 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2535         if (!BIO_set_read_buffer_size(bbio,1))
2536                 {
2537                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2538                 return(0);
2539                 }
2540         if (push)
2541                 {
2542                 if (s->wbio != bbio)
2543                         s->wbio=BIO_push(bbio,s->wbio);
2544                 }
2545         else
2546                 {
2547                 if (s->wbio == bbio)
2548                         s->wbio=BIO_pop(bbio);
2549                 }
2550         return(1);
2551         }
2552
2553 void ssl_free_wbio_buffer(SSL *s)
2554         {
2555         if (s->bbio == NULL) return;
2556
2557         if (s->bbio == s->wbio)
2558                 {
2559                 /* remove buffering */
2560                 s->wbio=BIO_pop(s->wbio);
2561 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2562                 assert(s->wbio != NULL);
2563 #endif
2564         }
2565         BIO_free(s->bbio);
2566         s->bbio=NULL;
2567         }
2568
2569 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2570         {
2571         ctx->quiet_shutdown=mode;
2572         }
2573
2574 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2575         {
2576         return(ctx->quiet_shutdown);
2577         }
2578
2579 void SSL_set_quiet_shutdown(SSL *s,int mode)
2580         {
2581         s->quiet_shutdown=mode;
2582         }
2583
2584 int SSL_get_quiet_shutdown(const SSL *s)
2585         {
2586         return(s->quiet_shutdown);
2587         }
2588
2589 void SSL_set_shutdown(SSL *s,int mode)
2590         {
2591         s->shutdown=mode;
2592         }
2593
2594 int SSL_get_shutdown(const SSL *s)
2595         {
2596         return(s->shutdown);
2597         }
2598
2599 int SSL_version(const SSL *s)
2600         {
2601         return(s->version);
2602         }
2603
2604 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2605         {
2606         return(ssl->ctx);
2607         }
2608
2609 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2610         {
2611         if (ssl->ctx == ctx)
2612                 return ssl->ctx;
2613 #ifndef OPENSSL_NO_TLSEXT
2614         if (ctx == NULL)
2615                 ctx = ssl->initial_ctx;
2616 #endif
2617         if (ssl->cert != NULL)
2618                 ssl_cert_free(ssl->cert);
2619         ssl->cert = ssl_cert_dup(ctx->cert);
2620         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2621         if (ssl->ctx != NULL)
2622                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2623         ssl->ctx = ctx;
2624         return(ssl->ctx);
2625         }
2626
2627 #ifndef OPENSSL_NO_STDIO
2628 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2629         {
2630         return(X509_STORE_set_default_paths(ctx->cert_store));
2631         }
2632
2633 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2634                 const char *CApath)
2635         {
2636         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2637         }
2638 #endif
2639
2640 void SSL_set_info_callback(SSL *ssl,
2641         void (*cb)(const SSL *ssl,int type,int val))
2642         {
2643         ssl->info_callback=cb;
2644         }
2645
2646 /* One compiler (Diab DCC) doesn't like argument names in returned
2647    function pointer.  */
2648 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2649         {
2650         return ssl->info_callback;
2651         }
2652
2653 int SSL_state(const SSL *ssl)
2654         {
2655         return(ssl->state);
2656         }
2657
2658 void SSL_set_verify_result(SSL *ssl,long arg)
2659         {
2660         ssl->verify_result=arg;
2661         }
2662
2663 long SSL_get_verify_result(const SSL *ssl)
2664         {
2665         return(ssl->verify_result);
2666         }
2667
2668 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2669                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2670         {
2671         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2672                                 new_func, dup_func, free_func);
2673         }
2674
2675 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2676         {
2677         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2678         }
2679
2680 void *SSL_get_ex_data(const SSL *s,int idx)
2681         {
2682         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2683         }
2684
2685 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2686                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2687         {
2688         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2689                                 new_func, dup_func, free_func);
2690         }
2691
2692 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2693         {
2694         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2695         }
2696
2697 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2698         {
2699         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2700         }
2701
2702 int ssl_ok(SSL *s)
2703         {
2704         return(1);
2705         }
2706
2707 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2708         {
2709         return(ctx->cert_store);
2710         }
2711
2712 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2713         {
2714         if (ctx->cert_store != NULL)
2715                 X509_STORE_free(ctx->cert_store);
2716         ctx->cert_store=store;
2717         }
2718
2719 int SSL_want(const SSL *s)
2720         {
2721         return(s->rwstate);
2722         }
2723
2724 /*!
2725  * \brief Set the callback for generating temporary RSA keys.
2726  * \param ctx the SSL context.
2727  * \param cb the callback
2728  */
2729
2730 #ifndef OPENSSL_NO_RSA
2731 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2732                                                           int is_export,
2733                                                           int keylength))
2734     {
2735     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2736     }
2737
2738 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2739                                                   int is_export,
2740                                                   int keylength))
2741     {
2742     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2743     }
2744 #endif
2745
2746 #ifdef DOXYGEN
2747 /*!
2748  * \brief The RSA temporary key callback function.
2749  * \param ssl the SSL session.
2750  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2751  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2752  * of the required key in bits.
2753  * \return the temporary RSA key.
2754  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2755  */
2756
2757 RSA *cb(SSL *ssl,int is_export,int keylength)
2758     {}
2759 #endif
2760
2761 /*!
2762  * \brief Set the callback for generating temporary DH keys.
2763  * \param ctx the SSL context.
2764  * \param dh the callback
2765  */
2766
2767 #ifndef OPENSSL_NO_DH
2768 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2769                                                         int keylength))
2770         {
2771         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2772         }
2773
2774 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2775                                                 int keylength))
2776         {
2777         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2778         }
2779 #endif
2780
2781 #ifndef OPENSSL_NO_ECDH
2782 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2783                                                         int keylength))
2784         {
2785         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2786         }
2787
2788 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2789                                                 int keylength))
2790         {
2791         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2792         }
2793 #endif
2794
2795
2796 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))
2797         {
2798         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2799         }
2800 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))
2801         {
2802         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2803         }
2804
2805
2806
2807 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2808 #include "../crypto/bio/bss_file.c"
2809 #endif
2810
2811 IMPLEMENT_STACK_OF(SSL_CIPHER)
2812 IMPLEMENT_STACK_OF(SSL_COMP)