crypto/openssl/ssl/s3_clnt.c

   1 /* ssl/s3_clnt.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  *
 114  * Portions of the attached software ("Contribution") are developed by
 115  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
 116  *
 117  * The Contribution is licensed pursuant to the OpenSSL open source
 118  * license provided above.
 119  *
 120  * ECC cipher suite support in OpenSSL originally written by
 121  * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
 122  *
 123  */
 124 /* ====================================================================
 125  * Copyright 2005 Nokia. All rights reserved.
 126  *
 127  * The portions of the attached software ("Contribution") is developed by
 128  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 129  * license.
 130  *
 131  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 132  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 133  * support (see RFC 4279) to OpenSSL.
 134  *
 135  * No patent licenses or other rights except those expressly stated in
 136  * the OpenSSL open source license shall be deemed granted or received
 137  * expressly, by implication, estoppel, or otherwise.
 138  *
 139  * No assurances are provided by Nokia that the Contribution does not
 140  * infringe the patent or other intellectual property rights of any third
 141  * party or that the license provides you with all the necessary rights
 142  * to make use of the Contribution.
 143  *
 144  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 145  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 146  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 147  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 148  * OTHERWISE.
 149  */
 150
 151 #include <stdio.h>
 152 #include "ssl_locl.h"
 153 #include "kssl_lcl.h"
 154 #include <openssl/buffer.h>
 155 #include <openssl/rand.h>
 156 #include <openssl/objects.h>
 157 #include <openssl/evp.h>
 158 #include <openssl/md5.h>
 159 #ifndef OPENSSL_NO_DH
 160 #include <openssl/dh.h>
 161 #endif
 162 #include <openssl/bn.h>
 163 #ifndef OPENSSL_NO_ENGINE
 164 #include <openssl/engine.h>
 165 #endif
 166
 167 static const SSL_METHOD *ssl3_get_client_method(int ver);
 168 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
 169
 170 static const SSL_METHOD *ssl3_get_client_method(int ver)
 171         {
 172         if (ver == SSL3_VERSION)
 173                 return(SSLv3_client_method());
 174         else
 175                 return(NULL);
 176         }
 177
 178 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
 179                         ssl_undefined_function,
 180                         ssl3_connect,
 181                         ssl3_get_client_method)
 182
 183 int ssl3_connect(SSL *s)
 184         {
 185         BUF_MEM *buf=NULL;
 186         unsigned long Time=(unsigned long)time(NULL);
 187         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 188         int ret= -1;
 189         int new_state,state,skip=0;
 190
 191         RAND_add(&Time,sizeof(Time),0);
 192         ERR_clear_error();
 193         clear_sys_error();
 194
 195         if (s->info_callback != NULL)
 196                 cb=s->info_callback;
 197         else if (s->ctx->info_callback != NULL)
 198                 cb=s->ctx->info_callback;
 199
 200         s->in_handshake++;
 201         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 202
 203         for (;;)
 204                 {
 205                 state=s->state;
 206
 207                 switch(s->state)
 208                         {
 209                 case SSL_ST_RENEGOTIATE:
 210                         s->new_session=1;
 211                         s->state=SSL_ST_CONNECT;
 212                         s->ctx->stats.sess_connect_renegotiate++;
 213                         /* break */
 214                 case SSL_ST_BEFORE:
 215                 case SSL_ST_CONNECT:
 216                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 217                 case SSL_ST_OK|SSL_ST_CONNECT:
 218
 219                         s->server=0;
 220                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 221
 222                         if ((s->version & 0xff00 ) != 0x0300)
 223                                 {
 224                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
 225                                 ret = -1;
 226                                 goto end;
 227                                 }
 228
 229                         /* s->version=SSL3_VERSION; */
 230                         s->type=SSL_ST_CONNECT;
 231
 232                         if (s->init_buf == NULL)
 233                                 {
 234                                 if ((buf=BUF_MEM_new()) == NULL)
 235                                         {
 236                                         ret= -1;
 237                                         goto end;
 238                                         }
 239                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 240                                         {
 241                                         ret= -1;
 242                                         goto end;
 243                                         }
 244                                 s->init_buf=buf;
 245                                 buf=NULL;
 246                                 }
 247
 248                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 249
 250                         /* setup buffing BIO */
 251                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
 252
 253                         /* don't push the buffering BIO quite yet */
 254
 255                         ssl3_init_finished_mac(s);
 256
 257                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
 258                         s->ctx->stats.sess_connect++;
 259                         s->init_num=0;
 260                         break;
 261
 262                 case SSL3_ST_CW_CLNT_HELLO_A:
 263                 case SSL3_ST_CW_CLNT_HELLO_B:
 264
 265                         s->shutdown=0;
 266                         ret=ssl3_client_hello(s);
 267                         if (ret <= 0) goto end;
 268                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
 269                         s->init_num=0;
 270
 271                         /* turn on buffering for the next lot of output */
 272                         if (s->bbio != s->wbio)
 273                                 s->wbio=BIO_push(s->bbio,s->wbio);
 274
 275                         break;
 276
 277                 case SSL3_ST_CR_SRVR_HELLO_A:
 278                 case SSL3_ST_CR_SRVR_HELLO_B:
 279                         ret=ssl3_get_server_hello(s);
 280                         if (ret <= 0) goto end;
 281
 282                         if (s->hit)
 283                                 s->state=SSL3_ST_CR_FINISHED_A;
 284                         else
 285                                 s->state=SSL3_ST_CR_CERT_A;
 286                         s->init_num=0;
 287                         break;
 288
 289                 case SSL3_ST_CR_CERT_A:
 290                 case SSL3_ST_CR_CERT_B:
 291 #ifndef OPENSSL_NO_TLSEXT
 292                         ret=ssl3_check_finished(s);
 293                         if (ret <= 0) goto end;
 294                         if (ret == 2)
 295                                 {
 296                                 s->hit = 1;
 297                                 if (s->tlsext_ticket_expected)
 298                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
 299                                 else
 300                                         s->state=SSL3_ST_CR_FINISHED_A;
 301                                 s->init_num=0;
 302                                 break;
 303                                 }
 304 #endif
 305                         /* Check if it is anon DH/ECDH */
 306                         /* or PSK */
 307                         if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
 308                             !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
 309                                 {
 310                                 ret=ssl3_get_server_certificate(s);
 311                                 if (ret <= 0) goto end;
 312 #ifndef OPENSSL_NO_TLSEXT
 313                                 if (s->tlsext_status_expected)
 314                                         s->state=SSL3_ST_CR_CERT_STATUS_A;
 315                                 else
 316                                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 317                                 }
 318                         else
 319                                 {
 320                                 skip = 1;
 321                                 s->state=SSL3_ST_CR_KEY_EXCH_A;
 322                                 }
 323 #else
 324                                 }
 325                         else
 326                                 skip=1;
 327
 328                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 329 #endif
 330                         s->init_num=0;
 331                         break;
 332
 333                 case SSL3_ST_CR_KEY_EXCH_A:
 334                 case SSL3_ST_CR_KEY_EXCH_B:
 335                         ret=ssl3_get_key_exchange(s);
 336                         if (ret <= 0) goto end;
 337                         s->state=SSL3_ST_CR_CERT_REQ_A;
 338                         s->init_num=0;
 339
 340                         /* at this point we check that we have the
 341                          * required stuff from the server */
 342                         if (!ssl3_check_cert_and_algorithm(s))
 343                                 {
 344                                 ret= -1;
 345                                 goto end;
 346                                 }
 347                         break;
 348
 349                 case SSL3_ST_CR_CERT_REQ_A:
 350                 case SSL3_ST_CR_CERT_REQ_B:
 351                         ret=ssl3_get_certificate_request(s);
 352                         if (ret <= 0) goto end;
 353                         s->state=SSL3_ST_CR_SRVR_DONE_A;
 354                         s->init_num=0;
 355                         break;
 356
 357                 case SSL3_ST_CR_SRVR_DONE_A:
 358                 case SSL3_ST_CR_SRVR_DONE_B:
 359                         ret=ssl3_get_server_done(s);
 360                         if (ret <= 0) goto end;
 361                         if (s->s3->tmp.cert_req)
 362                                 s->state=SSL3_ST_CW_CERT_A;
 363                         else
 364                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
 365                         s->init_num=0;
 366
 367                         break;
 368
 369                 case SSL3_ST_CW_CERT_A:
 370                 case SSL3_ST_CW_CERT_B:
 371                 case SSL3_ST_CW_CERT_C:
 372                 case SSL3_ST_CW_CERT_D:
 373                         ret=ssl3_send_client_certificate(s);
 374                         if (ret <= 0) goto end;
 375                         s->state=SSL3_ST_CW_KEY_EXCH_A;
 376                         s->init_num=0;
 377                         break;
 378
 379                 case SSL3_ST_CW_KEY_EXCH_A:
 380                 case SSL3_ST_CW_KEY_EXCH_B:
 381                         ret=ssl3_send_client_key_exchange(s);
 382                         if (ret <= 0) goto end;
 383                         /* EAY EAY EAY need to check for DH fix cert
 384                          * sent back */
 385                         /* For TLS, cert_req is set to 2, so a cert chain
 386                          * of nothing is sent, but no verify packet is sent */
 387                         /* XXX: For now, we do not support client
 388                          * authentication in ECDH cipher suites with
 389                          * ECDH (rather than ECDSA) certificates.
 390                          * We need to skip the certificate verify
 391                          * message when client's ECDH public key is sent
 392                          * inside the client certificate.
 393                          */
 394                         if (s->s3->tmp.cert_req == 1)
 395                                 {
 396                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
 397                                 }
 398                         else
 399                                 {
 400                                 s->state=SSL3_ST_CW_CHANGE_A;
 401                                 s->s3->change_cipher_spec=0;
 402                                 }
 403                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
 404                                 {
 405                                 s->state=SSL3_ST_CW_CHANGE_A;
 406                                 s->s3->change_cipher_spec=0;
 407                                 }
 408
 409                         s->init_num=0;
 410                         break;
 411
 412                 case SSL3_ST_CW_CERT_VRFY_A:
 413                 case SSL3_ST_CW_CERT_VRFY_B:
 414                         ret=ssl3_send_client_verify(s);
 415                         if (ret <= 0) goto end;
 416                         s->state=SSL3_ST_CW_CHANGE_A;
 417                         s->init_num=0;
 418                         s->s3->change_cipher_spec=0;
 419                         break;
 420
 421                 case SSL3_ST_CW_CHANGE_A:
 422                 case SSL3_ST_CW_CHANGE_B:
 423                         ret=ssl3_send_change_cipher_spec(s,
 424                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
 425                         if (ret <= 0) goto end;
 426                         s->state=SSL3_ST_CW_FINISHED_A;
 427                         s->init_num=0;
 428
 429                         s->session->cipher=s->s3->tmp.new_cipher;
 430 #ifdef OPENSSL_NO_COMP
 431                         s->session->compress_meth=0;
 432 #else
 433                         if (s->s3->tmp.new_compression == NULL)
 434                                 s->session->compress_meth=0;
 435                         else
 436                                 s->session->compress_meth=
 437                                         s->s3->tmp.new_compression->id;
 438 #endif
 439                         if (!s->method->ssl3_enc->setup_key_block(s))
 440                                 {
 441                                 ret= -1;
 442                                 goto end;
 443                                 }
 444
 445                         if (!s->method->ssl3_enc->change_cipher_state(s,
 446                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
 447                                 {
 448                                 ret= -1;
 449                                 goto end;
 450                                 }
 451
 452                         break;
 453
 454                 case SSL3_ST_CW_FINISHED_A:
 455                 case SSL3_ST_CW_FINISHED_B:
 456                         ret=ssl3_send_finished(s,
 457                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
 458                                 s->method->ssl3_enc->client_finished_label,
 459                                 s->method->ssl3_enc->client_finished_label_len);
 460                         if (ret <= 0) goto end;
 461                         s->state=SSL3_ST_CW_FLUSH;
 462
 463                         /* clear flags */
 464                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 465                         if (s->hit)
 466                                 {
 467                                 s->s3->tmp.next_state=SSL_ST_OK;
 468                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
 469                                         {
 470                                         s->state=SSL_ST_OK;
 471                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
 472                                         s->s3->delay_buf_pop_ret=0;
 473                                         }
 474                                 }
 475                         else
 476                                 {
 477 #ifndef OPENSSL_NO_TLSEXT
 478                                 /* Allow NewSessionTicket if ticket expected */
 479                                 if (s->tlsext_ticket_expected)
 480                                         s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
 481                                 else
 482 #endif
 483
 484                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
 485                                 }
 486                         s->init_num=0;
 487                         break;
 488
 489 #ifndef OPENSSL_NO_TLSEXT
 490                 case SSL3_ST_CR_SESSION_TICKET_A:
 491                 case SSL3_ST_CR_SESSION_TICKET_B:
 492                         ret=ssl3_get_new_session_ticket(s);
 493                         if (ret <= 0) goto end;
 494                         s->state=SSL3_ST_CR_FINISHED_A;
 495                         s->init_num=0;
 496                 break;
 497
 498                 case SSL3_ST_CR_CERT_STATUS_A:
 499                 case SSL3_ST_CR_CERT_STATUS_B:
 500                         ret=ssl3_get_cert_status(s);
 501                         if (ret <= 0) goto end;
 502                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 503                         s->init_num=0;
 504                 break;
 505 #endif
 506
 507                 case SSL3_ST_CR_FINISHED_A:
 508                 case SSL3_ST_CR_FINISHED_B:
 509
 510                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 511                                 SSL3_ST_CR_FINISHED_B);
 512                         if (ret <= 0) goto end;
 513
 514                         if (s->hit)
 515                                 s->state=SSL3_ST_CW_CHANGE_A;
 516                         else
 517                                 s->state=SSL_ST_OK;
 518                         s->init_num=0;
 519                         break;
 520
 521                 case SSL3_ST_CW_FLUSH:
 522                         s->rwstate=SSL_WRITING;
 523                         if (BIO_flush(s->wbio) <= 0)
 524                                 {
 525                                 ret= -1;
 526                                 goto end;
 527                                 }
 528                         s->rwstate=SSL_NOTHING;
 529                         s->state=s->s3->tmp.next_state;
 530                         break;
 531
 532                 case SSL_ST_OK:
 533                         /* clean a few things up */
 534                         ssl3_cleanup_key_block(s);
 535
 536                         if (s->init_buf != NULL)
 537                                 {
 538                                 BUF_MEM_free(s->init_buf);
 539                                 s->init_buf=NULL;
 540                                 }
 541
 542                         /* If we are not 'joining' the last two packets,
 543                          * remove the buffering now */
 544                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 545                                 ssl_free_wbio_buffer(s);
 546                         /* else do it later in ssl3_write */
 547
 548                         s->init_num=0;
 549                         s->new_session=0;
 550
 551                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 552                         if (s->hit) s->ctx->stats.sess_hit++;
 553
 554                         ret=1;
 555                         /* s->server=0; */
 556                         s->handshake_func=ssl3_connect;
 557                         s->ctx->stats.sess_connect_good++;
 558
 559                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 560
 561                         goto end;
 562                         /* break; */
 563
 564                 default:
 565                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 566                         ret= -1;
 567                         goto end;
 568                         /* break; */
 569                         }
 570
 571                 /* did we do anything */
 572                 if (!s->s3->tmp.reuse_message && !skip)
 573                         {
 574                         if (s->debug)
 575                                 {
 576                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 577                                         goto end;
 578                                 }
 579
 580                         if ((cb != NULL) && (s->state != state))
 581                                 {
 582                                 new_state=s->state;
 583                                 s->state=state;
 584                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 585                                 s->state=new_state;
 586                                 }
 587                         }
 588                 skip=0;
 589                 }
 590 end:
 591         s->in_handshake--;
 592         if (buf != NULL)
 593                 BUF_MEM_free(buf);
 594         if (cb != NULL)
 595                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 596         return(ret);
 597         }
 598
 599
 600 int ssl3_client_hello(SSL *s)
 601         {
 602         unsigned char *buf;
 603         unsigned char *p,*d;
 604         int i;
 605         unsigned long Time,l;
 606 #ifndef OPENSSL_NO_COMP
 607         int j;
 608         SSL_COMP *comp;
 609 #endif
 610
 611         buf=(unsigned char *)s->init_buf->data;
 612         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 613                 {
 614                 SSL_SESSION *sess = s->session;
 615                 if ((sess == NULL) ||
 616                         (sess->ssl_version != s->version) ||
 617 #ifdef OPENSSL_NO_TLSEXT
 618                         !sess->session_id_length ||
 619 #else
 620                         (!sess->session_id_length && !sess->tlsext_tick) ||
 621 #endif
 622                         (sess->not_resumable))
 623                         {
 624                         if (!ssl_get_new_session(s,0))
 625                                 goto err;
 626                         }
 627                 /* else use the pre-loaded session */
 628
 629                 p=s->s3->client_random;
 630                 Time=(unsigned long)time(NULL);                 /* Time */
 631                 l2n(Time,p);
 632                 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
 633                         goto err;
 634
 635                 /* Do the message type and length last */
 636                 d=p= &(buf[4]);
 637
 638                 *(p++)=s->version>>8;
 639                 *(p++)=s->version&0xff;
 640                 s->client_version=s->version;
 641
 642                 /* Random stuff */
 643                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 644                 p+=SSL3_RANDOM_SIZE;
 645
 646                 /* Session ID */
 647                 if (s->new_session)
 648                         i=0;
 649                 else
 650                         i=s->session->session_id_length;
 651                 *(p++)=i;
 652                 if (i != 0)
 653                         {
 654                         if (i > (int)sizeof(s->session->session_id))
 655                                 {
 656                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
 657                                 goto err;
 658                                 }
 659                         memcpy(p,s->session->session_id,i);
 660                         p+=i;
 661                         }
 662
 663                 /* Ciphers supported */
 664                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
 665                 if (i == 0)
 666                         {
 667                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 668                         goto err;
 669                         }
 670                 s2n(i,p);
 671                 p+=i;
 672
 673                 /* COMPRESSION */
 674 #ifdef OPENSSL_NO_COMP
 675                 *(p++)=1;
 676 #else
 677
 678                 if ((s->options & SSL_OP_NO_COMPRESSION)
 679                                         || !s->ctx->comp_methods)
 680                         j=0;
 681                 else
 682                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 683                 *(p++)=1+j;
 684                 for (i=0; i<j; i++)
 685                         {
 686                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 687                         *(p++)=comp->id;
 688                         }
 689 #endif
 690                 *(p++)=0; /* Add the NULL method */
 691
 692 #ifndef OPENSSL_NO_TLSEXT
 693                 /* TLS extensions*/
 694                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
 695                         {
 696                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
 697                         goto err;
 698                         }
 699                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
 700                         {
 701                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
 702                         goto err;
 703                         }
 704 #endif
 705
 706                 l=(p-d);
 707                 d=buf;
 708                 *(d++)=SSL3_MT_CLIENT_HELLO;
 709                 l2n3(l,d);
 710
 711                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 712                 /* number of bytes to write */
 713                 s->init_num=p-buf;
 714                 s->init_off=0;
 715                 }
 716
 717         /* SSL3_ST_CW_CLNT_HELLO_B */
 718         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 719 err:
 720         return(-1);
 721         }
 722
 723 int ssl3_get_server_hello(SSL *s)
 724         {
 725         STACK_OF(SSL_CIPHER) *sk;
 726         const SSL_CIPHER *c;
 727         unsigned char *p,*d;
 728         int i,al,ok;
 729         unsigned int j;
 730         long n;
 731 #ifndef OPENSSL_NO_COMP
 732         SSL_COMP *comp;
 733 #endif
 734
 735         n=s->method->ssl_get_message(s,
 736                 SSL3_ST_CR_SRVR_HELLO_A,
 737                 SSL3_ST_CR_SRVR_HELLO_B,
 738                 -1,
 739                 20000, /* ?? */
 740                 &ok);
 741
 742         if (!ok) return((int)n);
 743
 744         if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 745                 {
 746                 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
 747                         {
 748                         if ( s->d1->send_cookie == 0)
 749                                 {
 750                                 s->s3->tmp.reuse_message = 1;
 751                                 return 1;
 752                                 }
 753                         else /* already sent a cookie */
 754                                 {
 755                                 al=SSL_AD_UNEXPECTED_MESSAGE;
 756                                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
 757                                 goto f_err;
 758                                 }
 759                         }
 760                 }
 761
 762         if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
 763                 {
 764                 al=SSL_AD_UNEXPECTED_MESSAGE;
 765                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
 766                 goto f_err;
 767                 }
 768
 769         d=p=(unsigned char *)s->init_msg;
 770
 771         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 772                 {
 773                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 774                 s->version=(s->version&0xff00)|p[1];
 775                 al=SSL_AD_PROTOCOL_VERSION;
 776                 goto f_err;
 777                 }
 778         p+=2;
 779
 780         /* load the server hello data */
 781         /* load the server random */
 782         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 783         p+=SSL3_RANDOM_SIZE;
 784
 785         /* get the session-id */
 786         j= *(p++);
 787
 788         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
 789                 {
 790                 al=SSL_AD_ILLEGAL_PARAMETER;
 791                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
 792                 goto f_err;
 793                 }
 794
 795 #ifndef OPENSSL_NO_TLSEXT
 796         /* check if we want to resume the session based on external pre-shared secret */
 797         if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
 798                 {
 799                 SSL_CIPHER *pref_cipher=NULL;
 800                 s->session->master_key_length=sizeof(s->session->master_key);
 801                 if (s->tls_session_secret_cb(s, s->session->master_key,
 802                                              &s->session->master_key_length,
 803                                              NULL, &pref_cipher,
 804                                              s->tls_session_secret_cb_arg))
 805                         {
 806                         s->session->cipher = pref_cipher ?
 807                                 pref_cipher : ssl_get_cipher_by_char(s, p+j);
 808                         }
 809                 }
 810 #endif /* OPENSSL_NO_TLSEXT */
 811
 812         if (j != 0 && j == s->session->session_id_length
 813             && memcmp(p,s->session->session_id,j) == 0)
 814             {
 815             if(s->sid_ctx_length != s->session->sid_ctx_length
 816                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 817                 {
 818                 /* actually a client application bug */
 819                 al=SSL_AD_ILLEGAL_PARAMETER;
 820                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 821                 goto f_err;
 822                 }
 823             s->hit=1;
 824             }
 825         else    /* a miss or crap from the other end */
 826                 {
 827                 /* If we were trying for session-id reuse, make a new
 828                  * SSL_SESSION so we don't stuff up other people */
 829                 s->hit=0;
 830                 if (s->session->session_id_length > 0)
 831                         {
 832                         if (!ssl_get_new_session(s,0))
 833                                 {
 834                                 al=SSL_AD_INTERNAL_ERROR;
 835                                 goto f_err;
 836                                 }
 837                         }
 838                 s->session->session_id_length=j;
 839                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 840                 }
 841         p+=j;
 842         c=ssl_get_cipher_by_char(s,p);
 843         if (c == NULL)
 844                 {
 845                 /* unknown cipher */
 846                 al=SSL_AD_ILLEGAL_PARAMETER;
 847                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 848                 goto f_err;
 849                 }
 850         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 851
 852         sk=ssl_get_ciphers_by_id(s);
 853         i=sk_SSL_CIPHER_find(sk,c);
 854         if (i < 0)
 855                 {
 856                 /* we did not say we would use this cipher */
 857                 al=SSL_AD_ILLEGAL_PARAMETER;
 858                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 859                 goto f_err;
 860                 }
 861
 862         /* Depending on the session caching (internal/external), the cipher
 863            and/or cipher_id values may not be set. Make sure that
 864            cipher_id is set and use it for comparison. */
 865         if (s->session->cipher)
 866                 s->session->cipher_id = s->session->cipher->id;
 867         if (s->hit && (s->session->cipher_id != c->id))
 868                 {
 869                 if (!(s->options &
 870                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 871                         {
 872                         al=SSL_AD_ILLEGAL_PARAMETER;
 873                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 874                         goto f_err;
 875                         }
 876                 }
 877         s->s3->tmp.new_cipher=c;
 878         if (!ssl3_digest_cached_records(s))
 879                 goto f_err;
 880
 881         /* lets get the compression algorithm */
 882         /* COMPRESSION */
 883 #ifdef OPENSSL_NO_COMP
 884         if (*(p++) != 0)
 885                 {
 886                 al=SSL_AD_ILLEGAL_PARAMETER;
 887                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 888                 goto f_err;
 889                 }
 890         /* If compression is disabled we'd better not try to resume a session
 891          * using compression.
 892          */
 893         if (s->session->compress_meth != 0)
 894                 {
 895                 al=SSL_AD_INTERNAL_ERROR;
 896                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
 897                 goto f_err;
 898                 }
 899 #else
 900         j= *(p++);
 901         if (s->hit && j != s->session->compress_meth)
 902                 {
 903                 al=SSL_AD_ILLEGAL_PARAMETER;
 904                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
 905                 goto f_err;
 906                 }
 907         if (j == 0)
 908                 comp=NULL;
 909         else if (s->options & SSL_OP_NO_COMPRESSION)
 910                 {
 911                 al=SSL_AD_ILLEGAL_PARAMETER;
 912                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
 913                 goto f_err;
 914                 }
 915         else
 916                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
 917
 918         if ((j != 0) && (comp == NULL))
 919                 {
 920                 al=SSL_AD_ILLEGAL_PARAMETER;
 921                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 922                 goto f_err;
 923                 }
 924         else
 925                 {
 926                 s->s3->tmp.new_compression=comp;
 927                 }
 928 #endif
 929
 930 #ifndef OPENSSL_NO_TLSEXT
 931         /* TLS extensions*/
 932         if (s->version >= SSL3_VERSION)
 933                 {
 934                 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
 935                         {
 936                         /* 'al' set by ssl_parse_serverhello_tlsext */
 937                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
 938                         goto f_err;
 939                         }
 940                 if (ssl_check_serverhello_tlsext(s) <= 0)
 941                         {
 942                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
 943                                 goto err;
 944                         }
 945                 }
 946 #endif
 947
 948         if (p != (d+n))
 949                 {
 950                 /* wrong packet length */
 951                 al=SSL_AD_DECODE_ERROR;
 952                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
 953                 goto err;
 954                 }
 955
 956         return(1);
 957 f_err:
 958         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 959 err:
 960         return(-1);
 961         }
 962
 963 int ssl3_get_server_certificate(SSL *s)
 964         {
 965         int al,i,ok,ret= -1;
 966         unsigned long n,nc,llen,l;
 967         X509 *x=NULL;
 968         const unsigned char *q,*p;
 969         unsigned char *d;
 970         STACK_OF(X509) *sk=NULL;
 971         SESS_CERT *sc;
 972         EVP_PKEY *pkey=NULL;
 973         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
 974
 975         n=s->method->ssl_get_message(s,
 976                 SSL3_ST_CR_CERT_A,
 977                 SSL3_ST_CR_CERT_B,
 978                 -1,
 979                 s->max_cert_list,
 980                 &ok);
 981
 982         if (!ok) return((int)n);
 983
 984         if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
 985                 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
 986                 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
 987                 {
 988                 s->s3->tmp.reuse_message=1;
 989                 return(1);
 990                 }
 991
 992         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
 993                 {
 994                 al=SSL_AD_UNEXPECTED_MESSAGE;
 995                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
 996                 goto f_err;
 997                 }
 998         p=d=(unsigned char *)s->init_msg;
 999
1000         if ((sk=sk_X509_new_null()) == NULL)
1001                 {
1002                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1003                 goto err;
1004                 }
1005
1006         n2l3(p,llen);
1007         if (llen+3 != n)
1008                 {
1009                 al=SSL_AD_DECODE_ERROR;
1010                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1011                 goto f_err;
1012                 }
1013         for (nc=0; nc<llen; )
1014                 {
1015                 n2l3(p,l);
1016                 if ((l+nc+3) > llen)
1017                         {
1018                         al=SSL_AD_DECODE_ERROR;
1019                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1020                         goto f_err;
1021                         }
1022
1023                 q=p;
1024                 x=d2i_X509(NULL,&q,l);
1025                 if (x == NULL)
1026                         {
1027                         al=SSL_AD_BAD_CERTIFICATE;
1028                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1029                         goto f_err;
1030                         }
1031                 if (q != (p+l))
1032                         {
1033                         al=SSL_AD_DECODE_ERROR;
1034                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1035                         goto f_err;
1036                         }
1037                 if (!sk_X509_push(sk,x))
1038                         {
1039                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1040                         goto err;
1041                         }
1042                 x=NULL;
1043                 nc+=l+3;
1044                 p=q;
1045                 }
1046
1047         i=ssl_verify_cert_chain(s,sk);
1048         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1049 #ifndef OPENSSL_NO_KRB5
1050             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1051                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1052 #endif /* OPENSSL_NO_KRB5 */
1053                 )
1054                 {
1055                 al=ssl_verify_alarm_type(s->verify_result);
1056                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1057                 goto f_err;
1058                 }
1059         ERR_clear_error(); /* but we keep s->verify_result */
1060
1061         sc=ssl_sess_cert_new();
1062         if (sc == NULL) goto err;
1063
1064         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1065         s->session->sess_cert=sc;
1066
1067         sc->cert_chain=sk;
1068         /* Inconsistency alert: cert_chain does include the peer's
1069          * certificate, which we don't include in s3_srvr.c */
1070         x=sk_X509_value(sk,0);
1071         sk=NULL;
1072         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1073
1074         pkey=X509_get_pubkey(x);
1075
1076         /* VRS: allow null cert if auth == KRB5 */
1077         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1078                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1079                     ? 0 : 1;
1080
1081 #ifdef KSSL_DEBUG
1082         printf("pkey,x = %p, %p\n", pkey,x);
1083         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1084         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1085                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1086 #endif    /* KSSL_DEBUG */
1087
1088         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1089                 {
1090                 x=NULL;
1091                 al=SSL3_AL_FATAL;
1092                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1093                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1094                 goto f_err;
1095                 }
1096
1097         i=ssl_cert_type(x,pkey);
1098         if (need_cert && i < 0)
1099                 {
1100                 x=NULL;
1101                 al=SSL3_AL_FATAL;
1102                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1103                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1104                 goto f_err;
1105                 }
1106
1107         if (need_cert)
1108                 {
1109                 sc->peer_cert_type=i;
1110                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1111                 /* Why would the following ever happen?
1112                  * We just created sc a couple of lines ago. */
1113                 if (sc->peer_pkeys[i].x509 != NULL)
1114                         X509_free(sc->peer_pkeys[i].x509);
1115                 sc->peer_pkeys[i].x509=x;
1116                 sc->peer_key= &(sc->peer_pkeys[i]);
1117
1118                 if (s->session->peer != NULL)
1119                         X509_free(s->session->peer);
1120                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1121                 s->session->peer=x;
1122                 }
1123         else
1124                 {
1125                 sc->peer_cert_type=i;
1126                 sc->peer_key= NULL;
1127
1128                 if (s->session->peer != NULL)
1129                         X509_free(s->session->peer);
1130                 s->session->peer=NULL;
1131                 }
1132         s->session->verify_result = s->verify_result;
1133
1134         x=NULL;
1135         ret=1;
1136
1137         if (0)
1138                 {
1139 f_err:
1140                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1141                 }
1142 err:
1143         EVP_PKEY_free(pkey);
1144         X509_free(x);
1145         sk_X509_pop_free(sk,X509_free);
1146         return(ret);
1147         }
1148
1149 int ssl3_get_key_exchange(SSL *s)
1150         {
1151 #ifndef OPENSSL_NO_RSA
1152         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1153 #endif
1154         EVP_MD_CTX md_ctx;
1155         unsigned char *param,*p;
1156         int al,i,j,param_len,ok;
1157         long n,alg_k,alg_a;
1158         EVP_PKEY *pkey=NULL;
1159 #ifndef OPENSSL_NO_RSA
1160         RSA *rsa=NULL;
1161 #endif
1162 #ifndef OPENSSL_NO_DH
1163         DH *dh=NULL;
1164 #endif
1165 #ifndef OPENSSL_NO_ECDH
1166         EC_KEY *ecdh = NULL;
1167         BN_CTX *bn_ctx = NULL;
1168         EC_POINT *srvr_ecpoint = NULL;
1169         int curve_nid = 0;
1170         int encoded_pt_len = 0;
1171 #endif
1172
1173         /* use same message size as in ssl3_get_certificate_request()
1174          * as ServerKeyExchange message may be skipped */
1175         n=s->method->ssl_get_message(s,
1176                 SSL3_ST_CR_KEY_EXCH_A,
1177                 SSL3_ST_CR_KEY_EXCH_B,
1178                 -1,
1179                 s->max_cert_list,
1180                 &ok);
1181         if (!ok) return((int)n);
1182
1183         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1184                 {
1185 #ifndef OPENSSL_NO_PSK
1186                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1187                    omitted if no identity hint is sent. Set
1188                    session->sess_cert anyway to avoid problems
1189                    later.*/
1190                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1191                         {
1192                         s->session->sess_cert=ssl_sess_cert_new();
1193                         if (s->ctx->psk_identity_hint)
1194                                 OPENSSL_free(s->ctx->psk_identity_hint);
1195                         s->ctx->psk_identity_hint = NULL;
1196                         }
1197 #endif
1198                 s->s3->tmp.reuse_message=1;
1199                 return(1);
1200                 }
1201
1202         param=p=(unsigned char *)s->init_msg;
1203         if (s->session->sess_cert != NULL)
1204                 {
1205 #ifndef OPENSSL_NO_RSA
1206                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1207                         {
1208                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1209                         s->session->sess_cert->peer_rsa_tmp=NULL;
1210                         }
1211 #endif
1212 #ifndef OPENSSL_NO_DH
1213                 if (s->session->sess_cert->peer_dh_tmp)
1214                         {
1215                         DH_free(s->session->sess_cert->peer_dh_tmp);
1216                         s->session->sess_cert->peer_dh_tmp=NULL;
1217                         }
1218 #endif
1219 #ifndef OPENSSL_NO_ECDH
1220                 if (s->session->sess_cert->peer_ecdh_tmp)
1221                         {
1222                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1223                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1224                         }
1225 #endif
1226                 }
1227         else
1228                 {
1229                 s->session->sess_cert=ssl_sess_cert_new();
1230                 }
1231
1232         param_len=0;
1233         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1234         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1235         EVP_MD_CTX_init(&md_ctx);
1236
1237 #ifndef OPENSSL_NO_PSK
1238         if (alg_k & SSL_kPSK)
1239                 {
1240                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1241
1242                 al=SSL_AD_HANDSHAKE_FAILURE;
1243                 n2s(p,i);
1244                 param_len=i+2;
1245                 /* Store PSK identity hint for later use, hint is used
1246                  * in ssl3_send_client_key_exchange.  Assume that the
1247                  * maximum length of a PSK identity hint can be as
1248                  * long as the maximum length of a PSK identity. */
1249                 if (i > PSK_MAX_IDENTITY_LEN)
1250                         {
1251                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1252                                 SSL_R_DATA_LENGTH_TOO_LONG);
1253                         goto f_err;
1254                         }
1255                 if (param_len > n)
1256                         {
1257                         al=SSL_AD_DECODE_ERROR;
1258                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1259                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1260                         goto f_err;
1261                         }
1262                 /* If received PSK identity hint contains NULL
1263                  * characters, the hint is truncated from the first
1264                  * NULL. p may not be ending with NULL, so create a
1265                  * NULL-terminated string. */
1266                 memcpy(tmp_id_hint, p, i);
1267                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1268                 if (s->ctx->psk_identity_hint != NULL)
1269                         OPENSSL_free(s->ctx->psk_identity_hint);
1270                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1271                 if (s->ctx->psk_identity_hint == NULL)
1272                         {
1273                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1274                         goto f_err;
1275                         }
1276
1277                 p+=i;
1278                 n-=param_len;
1279                 }
1280         else
1281 #endif /* !OPENSSL_NO_PSK */
1282 #ifndef OPENSSL_NO_RSA
1283         if (alg_k & SSL_kRSA)
1284                 {
1285                 if ((rsa=RSA_new()) == NULL)
1286                         {
1287                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1288                         goto err;
1289                         }
1290                 n2s(p,i);
1291                 param_len=i+2;
1292                 if (param_len > n)
1293                         {
1294                         al=SSL_AD_DECODE_ERROR;
1295                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1296                         goto f_err;
1297                         }
1298                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1299                         {
1300                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1301                         goto err;
1302                         }
1303                 p+=i;
1304
1305                 n2s(p,i);
1306                 param_len+=i+2;
1307                 if (param_len > n)
1308                         {
1309                         al=SSL_AD_DECODE_ERROR;
1310                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1311                         goto f_err;
1312                         }
1313                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1314                         {
1315                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1316                         goto err;
1317                         }
1318                 p+=i;
1319                 n-=param_len;
1320
1321                 /* this should be because we are using an export cipher */
1322                 if (alg_a & SSL_aRSA)
1323                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1324                 else
1325                         {
1326                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1327                         goto err;
1328                         }
1329                 s->session->sess_cert->peer_rsa_tmp=rsa;
1330                 rsa=NULL;
1331                 }
1332 #else /* OPENSSL_NO_RSA */
1333         if (0)
1334                 ;
1335 #endif
1336 #ifndef OPENSSL_NO_DH
1337         else if (alg_k & SSL_kEDH)
1338                 {
1339                 if ((dh=DH_new()) == NULL)
1340                         {
1341                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1342                         goto err;
1343                         }
1344                 n2s(p,i);
1345                 param_len=i+2;
1346                 if (param_len > n)
1347                         {
1348                         al=SSL_AD_DECODE_ERROR;
1349                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1350                         goto f_err;
1351                         }
1352                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1353                         {
1354                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1355                         goto err;
1356                         }
1357                 p+=i;
1358
1359                 n2s(p,i);
1360                 param_len+=i+2;
1361                 if (param_len > n)
1362                         {
1363                         al=SSL_AD_DECODE_ERROR;
1364                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1365                         goto f_err;
1366                         }
1367                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1368                         {
1369                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1370                         goto err;
1371                         }
1372                 p+=i;
1373
1374                 n2s(p,i);
1375                 param_len+=i+2;
1376                 if (param_len > n)
1377                         {
1378                         al=SSL_AD_DECODE_ERROR;
1379                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1380                         goto f_err;
1381                         }
1382                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1383                         {
1384                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1385                         goto err;
1386                         }
1387                 p+=i;
1388                 n-=param_len;
1389
1390 #ifndef OPENSSL_NO_RSA
1391                 if (alg_a & SSL_aRSA)
1392                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1393 #else
1394                 if (0)
1395                         ;
1396 #endif
1397 #ifndef OPENSSL_NO_DSA
1398                 else if (alg_a & SSL_aDSS)
1399                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1400 #endif
1401                 /* else anonymous DH, so no certificate or pkey. */
1402
1403                 s->session->sess_cert->peer_dh_tmp=dh;
1404                 dh=NULL;
1405                 }
1406         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1407                 {
1408                 al=SSL_AD_ILLEGAL_PARAMETER;
1409                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1410                 goto f_err;
1411                 }
1412 #endif /* !OPENSSL_NO_DH */
1413
1414 #ifndef OPENSSL_NO_ECDH
1415         else if (alg_k & SSL_kEECDH)
1416                 {
1417                 EC_GROUP *ngroup;
1418                 const EC_GROUP *group;
1419
1420                 if ((ecdh=EC_KEY_new()) == NULL)
1421                         {
1422                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1423                         goto err;
1424                         }
1425
1426                 /* Extract elliptic curve parameters and the
1427                  * server's ephemeral ECDH public key.
1428                  * Keep accumulating lengths of various components in
1429                  * param_len and make sure it never exceeds n.
1430                  */
1431
1432                 /* XXX: For now we only support named (not generic) curves
1433                  * and the ECParameters in this case is just three bytes.
1434                  */
1435                 param_len=3;
1436                 if ((param_len > n) ||
1437                     (*p != NAMED_CURVE_TYPE) ||
1438                     ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1439                         {
1440                         al=SSL_AD_INTERNAL_ERROR;
1441                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1442                         goto f_err;
1443                         }
1444
1445                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1446                 if (ngroup == NULL)
1447                         {
1448                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1449                         goto err;
1450                         }
1451                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1452                         {
1453                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1454                         goto err;
1455                         }
1456                 EC_GROUP_free(ngroup);
1457
1458                 group = EC_KEY_get0_group(ecdh);
1459
1460                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1461                     (EC_GROUP_get_degree(group) > 163))
1462                         {
1463                         al=SSL_AD_EXPORT_RESTRICTION;
1464                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1465                         goto f_err;
1466                         }
1467
1468                 p+=3;
1469
1470                 /* Next, get the encoded ECPoint */
1471                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1472                     ((bn_ctx = BN_CTX_new()) == NULL))
1473                         {
1474                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1475                         goto err;
1476                         }
1477
1478                 encoded_pt_len = *p;  /* length of encoded point */
1479                 p+=1;
1480                 param_len += (1 + encoded_pt_len);
1481                 if ((param_len > n) ||
1482                     (EC_POINT_oct2point(group, srvr_ecpoint,
1483                         p, encoded_pt_len, bn_ctx) == 0))
1484                         {
1485                         al=SSL_AD_DECODE_ERROR;
1486                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1487                         goto f_err;
1488                         }
1489
1490                 n-=param_len;
1491                 p+=encoded_pt_len;
1492
1493                 /* The ECC/TLS specification does not mention
1494                  * the use of DSA to sign ECParameters in the server
1495                  * key exchange message. We do support RSA and ECDSA.
1496                  */
1497                 if (0) ;
1498 #ifndef OPENSSL_NO_RSA
1499                 else if (alg_a & SSL_aRSA)
1500                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1501 #endif
1502 #ifndef OPENSSL_NO_ECDSA
1503                 else if (alg_a & SSL_aECDSA)
1504                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1505 #endif
1506                 /* else anonymous ECDH, so no certificate or pkey. */
1507                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1508                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1509                 ecdh=NULL;
1510                 BN_CTX_free(bn_ctx);
1511                 bn_ctx = NULL;
1512                 EC_POINT_free(srvr_ecpoint);
1513                 srvr_ecpoint = NULL;
1514                 }
1515         else if (alg_k)
1516                 {
1517                 al=SSL_AD_UNEXPECTED_MESSAGE;
1518                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1519                 goto f_err;
1520                 }
1521 #endif /* !OPENSSL_NO_ECDH */
1522
1523
1524         /* p points to the next byte, there are 'n' bytes left */
1525
1526         /* if it was signed, check the signature */
1527         if (pkey != NULL)
1528                 {
1529                 n2s(p,i);
1530                 n-=2;
1531                 j=EVP_PKEY_size(pkey);
1532
1533                 if ((i != n) || (n > j) || (n <= 0))
1534                         {
1535                         /* wrong packet length */
1536                         al=SSL_AD_DECODE_ERROR;
1537                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1538                         goto f_err;
1539                         }
1540
1541 #ifndef OPENSSL_NO_RSA
1542                 if (pkey->type == EVP_PKEY_RSA)
1543                         {
1544                         int num;
1545
1546                         j=0;
1547                         q=md_buf;
1548                         for (num=2; num > 0; num--)
1549                                 {
1550                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1551                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1552                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1553                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1554                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1555                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1556                                 q+=i;
1557                                 j+=i;
1558                                 }
1559                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1560                                                                 pkey->pkey.rsa);
1561                         if (i < 0)
1562                                 {
1563                                 al=SSL_AD_DECRYPT_ERROR;
1564                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1565                                 goto f_err;
1566                                 }
1567                         if (i == 0)
1568                                 {
1569                                 /* bad signature */
1570                                 al=SSL_AD_DECRYPT_ERROR;
1571                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1572                                 goto f_err;
1573                                 }
1574                         }
1575                 else
1576 #endif
1577 #ifndef OPENSSL_NO_DSA
1578                         if (pkey->type == EVP_PKEY_DSA)
1579                         {
1580                         /* lets do DSS */
1581                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1582                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1583                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1584                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1585                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1586                                 {
1587                                 /* bad signature */
1588                                 al=SSL_AD_DECRYPT_ERROR;
1589                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1590                                 goto f_err;
1591                                 }
1592                         }
1593                 else
1594 #endif
1595 #ifndef OPENSSL_NO_ECDSA
1596                         if (pkey->type == EVP_PKEY_EC)
1597                         {
1598                         /* let's do ECDSA */
1599                         EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1600                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1601                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1602                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1603                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1604                                 {
1605                                 /* bad signature */
1606                                 al=SSL_AD_DECRYPT_ERROR;
1607                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1608                                 goto f_err;
1609                                 }
1610                         }
1611                 else
1612 #endif
1613                         {
1614                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1615                         goto err;
1616                         }
1617                 }
1618         else
1619                 {
1620                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1621                         /* aNULL or kPSK do not need public keys */
1622                         {
1623                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1624                         goto err;
1625                         }
1626                 /* still data left over */
1627                 if (n != 0)
1628                         {
1629                         al=SSL_AD_DECODE_ERROR;
1630                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1631                         goto f_err;
1632                         }
1633                 }
1634         EVP_PKEY_free(pkey);
1635         EVP_MD_CTX_cleanup(&md_ctx);
1636         return(1);
1637 f_err:
1638         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1639 err:
1640         EVP_PKEY_free(pkey);
1641 #ifndef OPENSSL_NO_RSA
1642         if (rsa != NULL)
1643                 RSA_free(rsa);
1644 #endif
1645 #ifndef OPENSSL_NO_DH
1646         if (dh != NULL)
1647                 DH_free(dh);
1648 #endif
1649 #ifndef OPENSSL_NO_ECDH
1650         BN_CTX_free(bn_ctx);
1651         EC_POINT_free(srvr_ecpoint);
1652         if (ecdh != NULL)
1653                 EC_KEY_free(ecdh);
1654 #endif
1655         EVP_MD_CTX_cleanup(&md_ctx);
1656         return(-1);
1657         }
1658
1659 int ssl3_get_certificate_request(SSL *s)
1660         {
1661         int ok,ret=0;
1662         unsigned long n,nc,l;
1663         unsigned int llen,ctype_num,i;
1664         X509_NAME *xn=NULL;
1665         const unsigned char *p,*q;
1666         unsigned char *d;
1667         STACK_OF(X509_NAME) *ca_sk=NULL;
1668
1669         n=s->method->ssl_get_message(s,
1670                 SSL3_ST_CR_CERT_REQ_A,
1671                 SSL3_ST_CR_CERT_REQ_B,
1672                 -1,
1673                 s->max_cert_list,
1674                 &ok);
1675
1676         if (!ok) return((int)n);
1677
1678         s->s3->tmp.cert_req=0;
1679
1680         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1681                 {
1682                 s->s3->tmp.reuse_message=1;
1683                 return(1);
1684                 }
1685
1686         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1687                 {
1688                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1689                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1690                 goto err;
1691                 }
1692
1693         /* TLS does not like anon-DH with client cert */
1694         if (s->version > SSL3_VERSION)
1695                 {
1696                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1697                         {
1698                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1699                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1700                         goto err;
1701                         }
1702                 }
1703
1704         p=d=(unsigned char *)s->init_msg;
1705
1706         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1707                 {
1708                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1709                 goto err;
1710                 }
1711
1712         /* get the certificate types */
1713         ctype_num= *(p++);
1714         if (ctype_num > SSL3_CT_NUMBER)
1715                 ctype_num=SSL3_CT_NUMBER;
1716         for (i=0; i<ctype_num; i++)
1717                 s->s3->tmp.ctype[i]= p[i];
1718         p+=ctype_num;
1719
1720         /* get the CA RDNs */
1721         n2s(p,llen);
1722 #if 0
1723 {
1724 FILE *out;
1725 out=fopen("/tmp/vsign.der","w");
1726 fwrite(p,1,llen,out);
1727 fclose(out);
1728 }
1729 #endif
1730
1731         if ((llen+ctype_num+2+1) != n)
1732                 {
1733                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1734                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1735                 goto err;
1736                 }
1737
1738         for (nc=0; nc<llen; )
1739                 {
1740                 n2s(p,l);
1741                 if ((l+nc+2) > llen)
1742                         {
1743                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1744                                 goto cont; /* netscape bugs */
1745                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1746                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1747                         goto err;
1748                         }
1749
1750                 q=p;
1751
1752                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1753                         {
1754                         /* If netscape tolerance is on, ignore errors */
1755                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1756                                 goto cont;
1757                         else
1758                                 {
1759                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1760                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1761                                 goto err;
1762                                 }
1763                         }
1764
1765                 if (q != (p+l))
1766                         {
1767                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1768                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1769                         goto err;
1770                         }
1771                 if (!sk_X509_NAME_push(ca_sk,xn))
1772                         {
1773                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1774                         goto err;
1775                         }
1776
1777                 p+=l;
1778                 nc+=l+2;
1779                 }
1780
1781         if (0)
1782                 {
1783 cont:
1784                 ERR_clear_error();
1785                 }
1786
1787         /* we should setup a certificate to return.... */
1788         s->s3->tmp.cert_req=1;
1789         s->s3->tmp.ctype_num=ctype_num;
1790         if (s->s3->tmp.ca_names != NULL)
1791                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1792         s->s3->tmp.ca_names=ca_sk;
1793         ca_sk=NULL;
1794
1795         ret=1;
1796 err:
1797         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1798         return(ret);
1799         }
1800
1801 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1802         {
1803         return(X509_NAME_cmp(*a,*b));
1804         }
1805 #ifndef OPENSSL_NO_TLSEXT
1806 int ssl3_get_new_session_ticket(SSL *s)
1807         {
1808         int ok,al,ret=0, ticklen;
1809         long n;
1810         const unsigned char *p;
1811         unsigned char *d;
1812
1813         n=s->method->ssl_get_message(s,
1814                 SSL3_ST_CR_SESSION_TICKET_A,
1815                 SSL3_ST_CR_SESSION_TICKET_B,
1816                 -1,
1817                 16384,
1818                 &ok);
1819
1820         if (!ok)
1821                 return((int)n);
1822
1823         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1824                 {
1825                 s->s3->tmp.reuse_message=1;
1826                 return(1);
1827                 }
1828         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1829                 {
1830                 al=SSL_AD_UNEXPECTED_MESSAGE;
1831                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1832                 goto f_err;
1833                 }
1834         if (n < 6)
1835                 {
1836                 /* need at least ticket_lifetime_hint + ticket length */
1837                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1838                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1839                 goto f_err;
1840                 }
1841
1842         p=d=(unsigned char *)s->init_msg;
1843         n2l(p, s->session->tlsext_tick_lifetime_hint);
1844         n2s(p, ticklen);
1845         /* ticket_lifetime_hint + ticket_length + ticket */
1846         if (ticklen + 6 != n)
1847                 {
1848                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1849                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1850                 goto f_err;
1851                 }
1852         if (s->session->tlsext_tick)
1853                 {
1854                 OPENSSL_free(s->session->tlsext_tick);
1855                 s->session->tlsext_ticklen = 0;
1856                 }
1857         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1858         if (!s->session->tlsext_tick)
1859                 {
1860                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1861                 goto err;
1862                 }
1863         memcpy(s->session->tlsext_tick, p, ticklen);
1864         s->session->tlsext_ticklen = ticklen;
1865         /* There are two ways to detect a resumed ticket sesion.
1866          * One is to set an appropriate session ID and then the server
1867          * must return a match in ServerHello. This allows the normal
1868          * client session ID matching to work and we know much
1869          * earlier that the ticket has been accepted.
1870          *
1871          * The other way is to set zero length session ID when the
1872          * ticket is presented and rely on the handshake to determine
1873          * session resumption.
1874          *
1875          * We choose the former approach because this fits in with
1876          * assumptions elsewhere in OpenSSL. The session ID is set
1877          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1878          * ticket.
1879          */
1880         EVP_Digest(p, ticklen,
1881                         s->session->session_id, &s->session->session_id_length,
1882 #ifndef OPENSSL_NO_SHA256
1883                                                         EVP_sha256(), NULL);
1884 #else
1885                                                         EVP_sha1(), NULL);
1886 #endif
1887         ret=1;
1888         return(ret);
1889 f_err:
1890         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1891 err:
1892         return(-1);
1893         }
1894
1895 int ssl3_get_cert_status(SSL *s)
1896         {
1897         int ok, al;
1898         unsigned long resplen,n;
1899         const unsigned char *p;
1900
1901         n=s->method->ssl_get_message(s,
1902                 SSL3_ST_CR_CERT_STATUS_A,
1903                 SSL3_ST_CR_CERT_STATUS_B,
1904                 SSL3_MT_CERTIFICATE_STATUS,
1905                 16384,
1906                 &ok);
1907
1908         if (!ok) return((int)n);
1909         if (n < 4)
1910                 {
1911                 /* need at least status type + length */
1912                 al = SSL_AD_DECODE_ERROR;
1913                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1914                 goto f_err;
1915                 }
1916         p = (unsigned char *)s->init_msg;
1917         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1918                 {
1919                 al = SSL_AD_DECODE_ERROR;
1920                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1921                 goto f_err;
1922                 }
1923         n2l3(p, resplen);
1924         if (resplen + 4 != n)
1925                 {
1926                 al = SSL_AD_DECODE_ERROR;
1927                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1928                 goto f_err;
1929                 }
1930         if (s->tlsext_ocsp_resp)
1931                 OPENSSL_free(s->tlsext_ocsp_resp);
1932         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1933         if (!s->tlsext_ocsp_resp)
1934                 {
1935                 al = SSL_AD_INTERNAL_ERROR;
1936                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1937                 goto f_err;
1938                 }
1939         s->tlsext_ocsp_resplen = resplen;
1940         if (s->ctx->tlsext_status_cb)
1941                 {
1942                 int ret;
1943                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1944                 if (ret == 0)
1945                         {
1946                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1947                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1948                         goto f_err;
1949                         }
1950                 if (ret < 0)
1951                         {
1952                         al = SSL_AD_INTERNAL_ERROR;
1953                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1954                         goto f_err;
1955                         }
1956                 }
1957         return 1;
1958 f_err:
1959         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1960         return(-1);
1961         }
1962 #endif
1963
1964 int ssl3_get_server_done(SSL *s)
1965         {
1966         int ok,ret=0;
1967         long n;
1968
1969         n=s->method->ssl_get_message(s,
1970                 SSL3_ST_CR_SRVR_DONE_A,
1971                 SSL3_ST_CR_SRVR_DONE_B,
1972                 SSL3_MT_SERVER_DONE,
1973                 30, /* should be very small, like 0 :-) */
1974                 &ok);
1975
1976         if (!ok) return((int)n);
1977         if (n > 0)
1978                 {
1979                 /* should contain no data */
1980                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1981                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1982                 return -1;
1983                 }
1984         ret=1;
1985         return(ret);
1986         }
1987
1988
1989 int ssl3_send_client_key_exchange(SSL *s)
1990         {
1991         unsigned char *p,*d;
1992         int n;
1993         unsigned long alg_k;
1994 #ifndef OPENSSL_NO_RSA
1995         unsigned char *q;
1996         EVP_PKEY *pkey=NULL;
1997 #endif
1998 #ifndef OPENSSL_NO_KRB5
1999         KSSL_ERR kssl_err;
2000 #endif /* OPENSSL_NO_KRB5 */
2001 #ifndef OPENSSL_NO_ECDH
2002         EC_KEY *clnt_ecdh = NULL;
2003         const EC_POINT *srvr_ecpoint = NULL;
2004         EVP_PKEY *srvr_pub_pkey = NULL;
2005         unsigned char *encodedPoint = NULL;
2006         int encoded_pt_len = 0;
2007         BN_CTX * bn_ctx = NULL;
2008 #endif
2009
2010         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2011                 {
2012                 d=(unsigned char *)s->init_buf->data;
2013                 p= &(d[4]);
2014
2015                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2016
2017                 /* Fool emacs indentation */
2018                 if (0) {}
2019 #ifndef OPENSSL_NO_RSA
2020                 else if (alg_k & SSL_kRSA)
2021                         {
2022                         RSA *rsa;
2023                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2024
2025                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2026                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2027                         else
2028                                 {
2029                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2030                                 if ((pkey == NULL) ||
2031                                         (pkey->type != EVP_PKEY_RSA) ||
2032                                         (pkey->pkey.rsa == NULL))
2033                                         {
2034                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2035                                         goto err;
2036                                         }
2037                                 rsa=pkey->pkey.rsa;
2038                                 EVP_PKEY_free(pkey);
2039                                 }
2040
2041                         tmp_buf[0]=s->client_version>>8;
2042                         tmp_buf[1]=s->client_version&0xff;
2043                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2044                                         goto err;
2045
2046                         s->session->master_key_length=sizeof tmp_buf;
2047
2048                         q=p;
2049                         /* Fix buf for TLS and beyond */
2050                         if (s->version > SSL3_VERSION)
2051                                 p+=2;
2052                         n=RSA_public_encrypt(sizeof tmp_buf,
2053                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2054 #ifdef PKCS1_CHECK
2055                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2056                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2057 #endif
2058                         if (n <= 0)
2059                                 {
2060                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2061                                 goto err;
2062                                 }
2063
2064                         /* Fix buf for TLS and beyond */
2065                         if (s->version > SSL3_VERSION)
2066                                 {
2067                                 s2n(n,q);
2068                                 n+=2;
2069                                 }
2070
2071                         s->session->master_key_length=
2072                                 s->method->ssl3_enc->generate_master_secret(s,
2073                                         s->session->master_key,
2074                                         tmp_buf,sizeof tmp_buf);
2075                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2076                         }
2077 #endif
2078 #ifndef OPENSSL_NO_KRB5
2079                 else if (alg_k & SSL_kKRB5)
2080                         {
2081                         krb5_error_code krb5rc;
2082                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2083                         /*  krb5_data   krb5_ap_req;  */
2084                         krb5_data       *enc_ticket;
2085                         krb5_data       authenticator, *authp = NULL;
2086                         EVP_CIPHER_CTX  ciph_ctx;
2087                         const EVP_CIPHER *enc = NULL;
2088                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2089                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2090                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
2091                                                 + EVP_MAX_IV_LENGTH];
2092                         int             padl, outl = sizeof(epms);
2093
2094                         EVP_CIPHER_CTX_init(&ciph_ctx);
2095
2096 #ifdef KSSL_DEBUG
2097                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2098                                 alg_k, SSL_kKRB5);
2099 #endif  /* KSSL_DEBUG */
2100
2101                         authp = NULL;
2102 #ifdef KRB5SENDAUTH
2103                         if (KRB5SENDAUTH)  authp = &authenticator;
2104 #endif  /* KRB5SENDAUTH */
2105
2106                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2107                                 &kssl_err);
2108                         enc = kssl_map_enc(kssl_ctx->enctype);
2109                         if (enc == NULL)
2110                             goto err;
2111 #ifdef KSSL_DEBUG
2112                         {
2113                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2114                         if (krb5rc && kssl_err.text)
2115                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2116                         }
2117 #endif  /* KSSL_DEBUG */
2118
2119                         if (krb5rc)
2120                                 {
2121                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2122                                                 SSL_AD_HANDSHAKE_FAILURE);
2123                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2124                                                 kssl_err.reason);
2125                                 goto err;
2126                                 }
2127
2128                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2129                         **  in place of RFC 2712 KerberosWrapper, as in:
2130                         **
2131                         **  Send ticket (copy to *p, set n = length)
2132                         **  n = krb5_ap_req.length;
2133                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2134                         **  if (krb5_ap_req.data)
2135                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2136                         **
2137                         **  Now using real RFC 2712 KerberosWrapper
2138                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2139                         **  Note: 2712 "opaque" types are here replaced
2140                         **  with a 2-byte length followed by the value.
2141                         **  Example:
2142                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2143                         **  Where "xx xx" = length bytes.  Shown here with
2144                         **  optional authenticator omitted.
2145                         */
2146
2147                         /*  KerberosWrapper.Ticket              */
2148                         s2n(enc_ticket->length,p);
2149                         memcpy(p, enc_ticket->data, enc_ticket->length);
2150                         p+= enc_ticket->length;
2151                         n = enc_ticket->length + 2;
2152
2153                         /*  KerberosWrapper.Authenticator       */
2154                         if (authp  &&  authp->length)
2155                                 {
2156                                 s2n(authp->length,p);
2157                                 memcpy(p, authp->data, authp->length);
2158                                 p+= authp->length;
2159                                 n+= authp->length + 2;
2160
2161                                 free(authp->data);
2162                                 authp->data = NULL;
2163                                 authp->length = 0;
2164                                 }
2165                         else
2166                                 {
2167                                 s2n(0,p);/*  null authenticator length  */
2168                                 n+=2;
2169                                 }
2170
2171                             tmp_buf[0]=s->client_version>>8;
2172                             tmp_buf[1]=s->client_version&0xff;
2173                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2174                                 goto err;
2175
2176                         /*  20010420 VRS.  Tried it this way; failed.
2177                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2178                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2179                         **                              kssl_ctx->length);
2180                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2181                         */
2182
2183                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2184                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2185                                 kssl_ctx->key,iv);
2186                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2187                                 sizeof tmp_buf);
2188                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2189                         outl += padl;
2190                         if (outl > (int)sizeof epms)
2191                                 {
2192                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2193                                 goto err;
2194                                 }
2195                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2196
2197                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2198                         s2n(outl,p);
2199                         memcpy(p, epms, outl);
2200                         p+=outl;
2201                         n+=outl + 2;
2202
2203                         s->session->master_key_length=
2204                                 s->method->ssl3_enc->generate_master_secret(s,
2205                                         s->session->master_key,
2206                                         tmp_buf, sizeof tmp_buf);
2207
2208                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2209                         OPENSSL_cleanse(epms, outl);
2210                         }
2211 #endif
2212 #ifndef OPENSSL_NO_DH
2213                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2214                         {
2215                         DH *dh_srvr,*dh_clnt;
2216
2217                         if (s->session->sess_cert == NULL)
2218                                 {
2219                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2220                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2221                                 goto err;
2222                                 }
2223
2224                         if (s->session->sess_cert->peer_dh_tmp != NULL)
2225                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2226                         else
2227                                 {
2228                                 /* we get them from the cert */
2229                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2230                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2231                                 goto err;
2232                                 }
2233
2234                         /* generate a new random key */
2235                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2236                                 {
2237                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2238                                 goto err;
2239                                 }
2240                         if (!DH_generate_key(dh_clnt))
2241                                 {
2242                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2243                                 goto err;
2244                                 }
2245
2246                         /* use the 'p' output buffer for the DH key, but
2247                          * make sure to clear it out afterwards */
2248
2249                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2250
2251                         if (n <= 0)
2252                                 {
2253                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2254                                 goto err;
2255                                 }
2256
2257                         /* generate master key from the result */
2258                         s->session->master_key_length=
2259                                 s->method->ssl3_enc->generate_master_secret(s,
2260                                         s->session->master_key,p,n);
2261                         /* clean up */
2262                         memset(p,0,n);
2263
2264                         /* send off the data */
2265                         n=BN_num_bytes(dh_clnt->pub_key);
2266                         s2n(n,p);
2267                         BN_bn2bin(dh_clnt->pub_key,p);
2268                         n+=2;
2269
2270                         DH_free(dh_clnt);
2271
2272                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2273                         }
2274 #endif
2275
2276 #ifndef OPENSSL_NO_ECDH
2277                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2278                         {
2279                         const EC_GROUP *srvr_group = NULL;
2280                         EC_KEY *tkey;
2281                         int ecdh_clnt_cert = 0;
2282                         int field_size = 0;
2283
2284                         /* Did we send out the client's
2285                          * ECDH share for use in premaster
2286                          * computation as part of client certificate?
2287                          * If so, set ecdh_clnt_cert to 1.
2288                          */
2289                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2290                                 {
2291                                 /* XXX: For now, we do not support client
2292                                  * authentication using ECDH certificates.
2293                                  * To add such support, one needs to add
2294                                  * code that checks for appropriate
2295                                  * conditions and sets ecdh_clnt_cert to 1.
2296                                  * For example, the cert have an ECC
2297                                  * key on the same curve as the server's
2298                                  * and the key should be authorized for
2299                                  * key agreement.
2300                                  *
2301                                  * One also needs to add code in ssl3_connect
2302                                  * to skip sending the certificate verify
2303                                  * message.
2304                                  *
2305                                  * if ((s->cert->key->privatekey != NULL) &&
2306                                  *     (s->cert->key->privatekey->type ==
2307                                  *      EVP_PKEY_EC) && ...)
2308                                  * ecdh_clnt_cert = 1;
2309                                  */
2310                                 }
2311
2312                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2313                                 {
2314                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2315                                 }
2316                         else
2317                                 {
2318                                 /* Get the Server Public Key from Cert */
2319                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2320                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2321                                 if ((srvr_pub_pkey == NULL) ||
2322                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2323                                     (srvr_pub_pkey->pkey.ec == NULL))
2324                                         {
2325                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2326                                             ERR_R_INTERNAL_ERROR);
2327                                         goto err;
2328                                         }
2329
2330                                 tkey = srvr_pub_pkey->pkey.ec;
2331                                 }
2332
2333                         srvr_group   = EC_KEY_get0_group(tkey);
2334                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2335
2336                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2337                                 {
2338                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2339                                     ERR_R_INTERNAL_ERROR);
2340                                 goto err;
2341                                 }
2342
2343                         if ((clnt_ecdh=EC_KEY_new()) == NULL)
2344                                 {
2345                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2346                                 goto err;
2347                                 }
2348
2349                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2350                                 {
2351                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2352                                 goto err;
2353                                 }
2354                         if (ecdh_clnt_cert)
2355                                 {
2356                                 /* Reuse key info from our certificate
2357                                  * We only need our private key to perform
2358                                  * the ECDH computation.
2359                                  */
2360                                 const BIGNUM *priv_key;
2361                                 tkey = s->cert->key->privatekey->pkey.ec;
2362                                 priv_key = EC_KEY_get0_private_key(tkey);
2363                                 if (priv_key == NULL)
2364                                         {
2365                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2366                                         goto err;
2367                                         }
2368                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2369                                         {
2370                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2371                                         goto err;
2372                                         }
2373                                 }
2374                         else
2375                                 {
2376                                 /* Generate a new ECDH key pair */
2377                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2378                                         {
2379                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2380                                         goto err;
2381                                         }
2382                                 }
2383
2384                         /* use the 'p' output buffer for the ECDH key, but
2385                          * make sure to clear it out afterwards
2386                          */
2387
2388                         field_size = EC_GROUP_get_degree(srvr_group);
2389                         if (field_size <= 0)
2390                                 {
2391                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2392                                        ERR_R_ECDH_LIB);
2393                                 goto err;
2394                                 }
2395                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2396                         if (n <= 0)
2397                                 {
2398                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2399                                        ERR_R_ECDH_LIB);
2400                                 goto err;
2401                                 }
2402
2403                         /* generate master key from the result */
2404                         s->session->master_key_length = s->method->ssl3_enc \
2405                             -> generate_master_secret(s,
2406                                 s->session->master_key,
2407                                 p, n);
2408
2409                         memset(p, 0, n); /* clean up */
2410
2411                         if (ecdh_clnt_cert)
2412                                 {
2413                                 /* Send empty client key exch message */
2414                                 n = 0;
2415                                 }
2416                         else
2417                                 {
2418                                 /* First check the size of encoding and
2419                                  * allocate memory accordingly.
2420                                  */
2421                                 encoded_pt_len =
2422                                     EC_POINT_point2oct(srvr_group,
2423                                         EC_KEY_get0_public_key(clnt_ecdh),
2424                                         POINT_CONVERSION_UNCOMPRESSED,
2425                                         NULL, 0, NULL);
2426
2427                                 encodedPoint = (unsigned char *)
2428                                     OPENSSL_malloc(encoded_pt_len *
2429                                         sizeof(unsigned char));
2430                                 bn_ctx = BN_CTX_new();
2431                                 if ((encodedPoint == NULL) ||
2432                                     (bn_ctx == NULL))
2433                                         {
2434                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2435                                         goto err;
2436                                         }
2437
2438                                 /* Encode the public key */
2439                                 n = EC_POINT_point2oct(srvr_group,
2440                                     EC_KEY_get0_public_key(clnt_ecdh),
2441                                     POINT_CONVERSION_UNCOMPRESSED,
2442                                     encodedPoint, encoded_pt_len, bn_ctx);
2443
2444                                 *p = n; /* length of encoded point */
2445                                 /* Encoded point will be copied here */
2446                                 p += 1;
2447                                 /* copy the point */
2448                                 memcpy((unsigned char *)p, encodedPoint, n);
2449                                 /* increment n to account for length field */
2450                                 n += 1;
2451                                 }
2452
2453                         /* Free allocated memory */
2454                         BN_CTX_free(bn_ctx);
2455                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2456                         if (clnt_ecdh != NULL)
2457                                  EC_KEY_free(clnt_ecdh);
2458                         EVP_PKEY_free(srvr_pub_pkey);
2459                         }
2460 #endif /* !OPENSSL_NO_ECDH */
2461                 else if (alg_k & SSL_kGOST)
2462                         {
2463                         /* GOST key exchange message creation */
2464                         EVP_PKEY_CTX *pkey_ctx;
2465                         X509 *peer_cert;
2466                         size_t msglen;
2467                         unsigned int md_len;
2468                         int keytype;
2469                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2470                         EVP_MD_CTX *ukm_hash;
2471                         EVP_PKEY *pub_key;
2472
2473                         /* Get server sertificate PKEY and create ctx from it */
2474                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2475                         if (!peer_cert)
2476                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2477                         if (!peer_cert)         {
2478                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2479                                         goto err;
2480                                 }
2481
2482                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2483                         /* If we have send a certificate, and certificate key
2484
2485                          * parameters match those of server certificate, use
2486                          * certificate key for key exchange
2487                          */
2488
2489                          /* Otherwise, generate ephemeral key pair */
2490
2491                         EVP_PKEY_encrypt_init(pkey_ctx);
2492                           /* Generate session key */
2493                     RAND_bytes(premaster_secret,32);
2494                         /* If we have client certificate, use its secret as peer key */
2495                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2496                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2497                                         /* If there was an error - just ignore it. Ephemeral key
2498                                         * would be used
2499                                         */
2500                                         ERR_clear_error();
2501                                 }
2502                         }
2503                         /* Compute shared IV and store it in algorithm-specific
2504                          * context data */
2505                         ukm_hash = EVP_MD_CTX_create();
2506                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2507                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2508                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2509                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2510                         EVP_MD_CTX_destroy(ukm_hash);
2511                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2512                                 8,shared_ukm)<0) {
2513                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2514                                                 SSL_R_LIBRARY_BUG);
2515                                         goto err;
2516                                 }
2517                         /* Make GOST keytransport blob message */
2518                         /*Encapsulate it into sequence */
2519                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2520                         msglen=255;
2521                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2522                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2523                                         SSL_R_LIBRARY_BUG);
2524                                 goto err;
2525                         }
2526                         if (msglen >= 0x80)
2527                                 {
2528                                 *(p++)=0x81;
2529                                 *(p++)= msglen & 0xff;
2530                                 n=msglen+3;
2531                                 }
2532                         else
2533                                 {
2534                                 *(p++)= msglen & 0xff;
2535                                 n=msglen+2;
2536                                 }
2537                         memcpy(p, tmp, msglen);
2538                         /* Check if pubkey from client certificate was used */
2539                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2540                                 {
2541                                 /* Set flag "skip certificate verify" */
2542                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2543                                 }
2544                         EVP_PKEY_CTX_free(pkey_ctx);
2545                         s->session->master_key_length=
2546                                 s->method->ssl3_enc->generate_master_secret(s,
2547                                         s->session->master_key,premaster_secret,32);
2548                         EVP_PKEY_free(pub_key);
2549
2550                         }
2551 #ifndef OPENSSL_NO_PSK
2552                 else if (alg_k & SSL_kPSK)
2553                         {
2554                         char identity[PSK_MAX_IDENTITY_LEN];
2555                         unsigned char *t = NULL;
2556                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2557                         unsigned int pre_ms_len = 0, psk_len = 0;
2558                         int psk_err = 1;
2559
2560                         n = 0;
2561                         if (s->psk_client_callback == NULL)
2562                                 {
2563                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2564                                         SSL_R_PSK_NO_CLIENT_CB);
2565                                 goto err;
2566                                 }
2567
2568                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2569                                 identity, PSK_MAX_IDENTITY_LEN,
2570                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2571                         if (psk_len > PSK_MAX_PSK_LEN)
2572                                 {
2573                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2574                                         ERR_R_INTERNAL_ERROR);
2575                                 goto psk_err;
2576                                 }
2577                         else if (psk_len == 0)
2578                                 {
2579                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2580                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2581                                 goto psk_err;
2582                                 }
2583
2584                         /* create PSK pre_master_secret */
2585                         pre_ms_len = 2+psk_len+2+psk_len;
2586                         t = psk_or_pre_ms;
2587                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2588                         s2n(psk_len, t);
2589                         memset(t, 0, psk_len);
2590                         t+=psk_len;
2591                         s2n(psk_len, t);
2592
2593                         if (s->session->psk_identity_hint != NULL)
2594                                 OPENSSL_free(s->session->psk_identity_hint);
2595                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2596                         if (s->ctx->psk_identity_hint != NULL &&
2597                                 s->session->psk_identity_hint == NULL)
2598                                 {
2599                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2600                                         ERR_R_MALLOC_FAILURE);
2601                                 goto psk_err;
2602                                 }
2603
2604                         if (s->session->psk_identity != NULL)
2605                                 OPENSSL_free(s->session->psk_identity);
2606                         s->session->psk_identity = BUF_strdup(identity);
2607                         if (s->session->psk_identity == NULL)
2608                                 {
2609                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2610                                         ERR_R_MALLOC_FAILURE);
2611                                 goto psk_err;
2612                                 }
2613
2614                         s->session->master_key_length =
2615                                 s->method->ssl3_enc->generate_master_secret(s,
2616                                         s->session->master_key,
2617                                         psk_or_pre_ms, pre_ms_len);
2618                         n = strlen(identity);
2619                         s2n(n, p);
2620                         memcpy(p, identity, n);
2621                         n+=2;
2622                         psk_err = 0;
2623                 psk_err:
2624                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2625                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2626                         if (psk_err != 0)
2627                                 {
2628                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2629                                 goto err;
2630                                 }
2631                         }
2632 #endif
2633                 else
2634                         {
2635                         ssl3_send_alert(s, SSL3_AL_FATAL,
2636                             SSL_AD_HANDSHAKE_FAILURE);
2637                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2638                             ERR_R_INTERNAL_ERROR);
2639                         goto err;
2640                         }
2641
2642                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2643                 l2n3(n,d);
2644
2645                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2646                 /* number of bytes to write */
2647                 s->init_num=n+4;
2648                 s->init_off=0;
2649                 }
2650
2651         /* SSL3_ST_CW_KEY_EXCH_B */
2652         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2653 err:
2654 #ifndef OPENSSL_NO_ECDH
2655         BN_CTX_free(bn_ctx);
2656         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2657         if (clnt_ecdh != NULL)
2658                 EC_KEY_free(clnt_ecdh);
2659         EVP_PKEY_free(srvr_pub_pkey);
2660 #endif
2661         return(-1);
2662         }
2663
2664 int ssl3_send_client_verify(SSL *s)
2665         {
2666         unsigned char *p,*d;
2667         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2668         EVP_PKEY *pkey;
2669         EVP_PKEY_CTX *pctx=NULL;
2670 #ifndef OPENSSL_NO_RSA
2671         unsigned u=0;
2672 #endif
2673         unsigned long n;
2674         int j;
2675
2676         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2677                 {
2678                 d=(unsigned char *)s->init_buf->data;
2679                 p= &(d[4]);
2680                 pkey=s->cert->key->privatekey;
2681 /* Create context from key and test if sha1 is allowed as digest */
2682                 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2683                 EVP_PKEY_sign_init(pctx);
2684                 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2685                         {
2686                         s->method->ssl3_enc->cert_verify_mac(s,
2687                                                 NID_sha1,
2688                                                 &(data[MD5_DIGEST_LENGTH]));
2689                         }
2690                 else
2691                         {
2692                         ERR_clear_error();
2693                         }
2694 #ifndef OPENSSL_NO_RSA
2695                 if (pkey->type == EVP_PKEY_RSA)
2696                         {
2697                         s->method->ssl3_enc->cert_verify_mac(s,
2698                                 NID_md5,
2699                                 &(data[0]));
2700                         if (RSA_sign(NID_md5_sha1, data,
2701                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2702                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2703                                 {
2704                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2705                                 goto err;
2706                                 }
2707                         s2n(u,p);
2708                         n=u+2;
2709                         }
2710                 else
2711 #endif
2712 #ifndef OPENSSL_NO_DSA
2713                         if (pkey->type == EVP_PKEY_DSA)
2714                         {
2715                         if (!DSA_sign(pkey->save_type,
2716                                 &(data[MD5_DIGEST_LENGTH]),
2717                                 SHA_DIGEST_LENGTH,&(p[2]),
2718                                 (unsigned int *)&j,pkey->pkey.dsa))
2719                                 {
2720                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2721                                 goto err;
2722                                 }
2723                         s2n(j,p);
2724                         n=j+2;
2725                         }
2726                 else
2727 #endif
2728 #ifndef OPENSSL_NO_ECDSA
2729                         if (pkey->type == EVP_PKEY_EC)
2730                         {
2731                         if (!ECDSA_sign(pkey->save_type,
2732                                 &(data[MD5_DIGEST_LENGTH]),
2733                                 SHA_DIGEST_LENGTH,&(p[2]),
2734                                 (unsigned int *)&j,pkey->pkey.ec))
2735                                 {
2736                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2737                                     ERR_R_ECDSA_LIB);
2738                                 goto err;
2739                                 }
2740                         s2n(j,p);
2741                         n=j+2;
2742                         }
2743                 else
2744 #endif
2745                 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
2746                 {
2747                 unsigned char signbuf[64];
2748                 int i;
2749                 size_t sigsize=64;
2750                 s->method->ssl3_enc->cert_verify_mac(s,
2751                         NID_id_GostR3411_94,
2752                         data);
2753                 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
2754                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2755                         ERR_R_INTERNAL_ERROR);
2756                         goto err;
2757                 }
2758                 for (i=63,j=0; i>=0; j++, i--) {
2759                         p[2+j]=signbuf[i];
2760                 }
2761                 s2n(j,p);
2762                 n=j+2;
2763                 }
2764                 else
2765                 {
2766                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2767                         goto err;
2768                 }
2769                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2770                 l2n3(n,d);
2771
2772                 s->state=SSL3_ST_CW_CERT_VRFY_B;
2773                 s->init_num=(int)n+4;
2774                 s->init_off=0;
2775                 }
2776         EVP_PKEY_CTX_free(pctx);
2777         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2778 err:
2779         EVP_PKEY_CTX_free(pctx);
2780         return(-1);
2781         }
2782
2783 int ssl3_send_client_certificate(SSL *s)
2784         {
2785         X509 *x509=NULL;
2786         EVP_PKEY *pkey=NULL;
2787         int i;
2788         unsigned long l;
2789
2790         if (s->state == SSL3_ST_CW_CERT_A)
2791                 {
2792                 if ((s->cert == NULL) ||
2793                         (s->cert->key->x509 == NULL) ||
2794                         (s->cert->key->privatekey == NULL))
2795                         s->state=SSL3_ST_CW_CERT_B;
2796                 else
2797                         s->state=SSL3_ST_CW_CERT_C;
2798                 }
2799
2800         /* We need to get a client cert */
2801         if (s->state == SSL3_ST_CW_CERT_B)
2802                 {
2803                 /* If we get an error, we need to
2804                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2805                  * We then get retied later */
2806                 i=0;
2807                 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2808                 if (i < 0)
2809                         {
2810                         s->rwstate=SSL_X509_LOOKUP;
2811                         return(-1);
2812                         }
2813                 s->rwstate=SSL_NOTHING;
2814                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2815                         {
2816                         s->state=SSL3_ST_CW_CERT_B;
2817                         if (    !SSL_use_certificate(s,x509) ||
2818                                 !SSL_use_PrivateKey(s,pkey))
2819                                 i=0;
2820                         }
2821                 else if (i == 1)
2822                         {
2823                         i=0;
2824                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2825                         }
2826
2827                 if (x509 != NULL) X509_free(x509);
2828                 if (pkey != NULL) EVP_PKEY_free(pkey);
2829                 if (i == 0)
2830                         {
2831                         if (s->version == SSL3_VERSION)
2832                                 {
2833                                 s->s3->tmp.cert_req=0;
2834                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2835                                 return(1);
2836                                 }
2837                         else
2838                                 {
2839                                 s->s3->tmp.cert_req=2;
2840                                 }
2841                         }
2842
2843                 /* Ok, we have a cert */
2844                 s->state=SSL3_ST_CW_CERT_C;
2845                 }
2846
2847         if (s->state == SSL3_ST_CW_CERT_C)
2848                 {
2849                 s->state=SSL3_ST_CW_CERT_D;
2850                 l=ssl3_output_cert_chain(s,
2851                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2852                 s->init_num=(int)l;
2853                 s->init_off=0;
2854                 }
2855         /* SSL3_ST_CW_CERT_D */
2856         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2857         }
2858
2859 #define has_bits(i,m)   (((i)&(m)) == (m))
2860
2861 int ssl3_check_cert_and_algorithm(SSL *s)
2862         {
2863         int i,idx;
2864         long alg_k,alg_a;
2865         EVP_PKEY *pkey=NULL;
2866         SESS_CERT *sc;
2867 #ifndef OPENSSL_NO_RSA
2868         RSA *rsa;
2869 #endif
2870 #ifndef OPENSSL_NO_DH
2871         DH *dh;
2872 #endif
2873
2874         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2875         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
2876
2877         /* we don't have a certificate */
2878         if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
2879                 return(1);
2880
2881         sc=s->session->sess_cert;
2882         if (sc == NULL)
2883                 {
2884                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2885                 goto err;
2886                 }
2887
2888 #ifndef OPENSSL_NO_RSA
2889         rsa=s->session->sess_cert->peer_rsa_tmp;
2890 #endif
2891 #ifndef OPENSSL_NO_DH
2892         dh=s->session->sess_cert->peer_dh_tmp;
2893 #endif
2894
2895         /* This is the passed certificate */
2896
2897         idx=sc->peer_cert_type;
2898 #ifndef OPENSSL_NO_ECDH
2899         if (idx == SSL_PKEY_ECC)
2900                 {
2901                 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2902                     s->s3->tmp.new_cipher) == 0)
2903                         { /* check failed */
2904                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2905                         goto f_err;
2906                         }
2907                 else
2908                         {
2909                         return 1;
2910                         }
2911                 }
2912 #endif
2913         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2914         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2915         EVP_PKEY_free(pkey);
2916
2917
2918         /* Check that we have a certificate if we require one */
2919         if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2920                 {
2921                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2922                 goto f_err;
2923                 }
2924 #ifndef OPENSSL_NO_DSA
2925         else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2926                 {
2927                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2928                 goto f_err;
2929                 }
2930 #endif
2931 #ifndef OPENSSL_NO_RSA
2932         if ((alg_k & SSL_kRSA) &&
2933                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2934                 {
2935                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2936                 goto f_err;
2937                 }
2938 #endif
2939 #ifndef OPENSSL_NO_DH
2940         if ((alg_k & SSL_kEDH) &&
2941                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2942                 {
2943                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2944                 goto f_err;
2945                 }
2946         else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2947                 {
2948                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2949                 goto f_err;
2950                 }
2951 #ifndef OPENSSL_NO_DSA
2952         else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2953                 {
2954                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2955                 goto f_err;
2956                 }
2957 #endif
2958 #endif
2959
2960         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2961                 {
2962 #ifndef OPENSSL_NO_RSA
2963                 if (alg_k & SSL_kRSA)
2964                         {
2965                         if (rsa == NULL
2966                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2967                                 {
2968                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2969                                 goto f_err;
2970                                 }
2971                         }
2972                 else
2973 #endif
2974 #ifndef OPENSSL_NO_DH
2975                         if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2976                             {
2977                             if (dh == NULL
2978                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2979                                 {
2980                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2981                                 goto f_err;
2982                                 }
2983                         }
2984                 else
2985 #endif
2986                         {
2987                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2988                         goto f_err;
2989                         }
2990                 }
2991         return(1);
2992 f_err:
2993         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2994 err:
2995         return(0);
2996         }
2997
2998 /* Check to see if handshake is full or resumed. Usually this is just a
2999  * case of checking to see if a cache hit has occurred. In the case of
3000  * session tickets we have to check the next message to be sure.
3001  */
3002
3003 #ifndef OPENSSL_NO_TLSEXT
3004 int ssl3_check_finished(SSL *s)
3005         {
3006         int ok;
3007         long n;
3008         /* If we have no ticket it cannot be a resumed session. */
3009         if (!s->session->tlsext_tick)
3010                 return 1;
3011         /* this function is called when we really expect a Certificate
3012          * message, so permit appropriate message length */
3013         n=s->method->ssl_get_message(s,
3014                 SSL3_ST_CR_CERT_A,
3015                 SSL3_ST_CR_CERT_B,
3016                 -1,
3017                 s->max_cert_list,
3018                 &ok);
3019         if (!ok) return((int)n);
3020         s->s3->tmp.reuse_message = 1;
3021         if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3022                 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3023                 return 2;
3024
3025         return 1;
3026         }
3027 #endif
3028
3029 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3030         {
3031         int i = 0;
3032 #ifndef OPENSSL_NO_ENGINE
3033         if (s->ctx->client_cert_engine)
3034                 {
3035                 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3036                                                 SSL_get_client_CA_list(s),
3037                                                 px509, ppkey, NULL, NULL, NULL);
3038                 if (i != 0)
3039                         return i;
3040                 }
3041 #endif
3042         if (s->ctx->client_cert_cb)
3043                 i = s->ctx->client_cert_cb(s,px509,ppkey);
3044         return i;
3045         }