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->renegotiate=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->renegotiate=0;
 550                         s->new_session=0;
 551
 552                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 553                         if (s->hit) s->ctx->stats.sess_hit++;
 554
 555                         ret=1;
 556                         /* s->server=0; */
 557                         s->handshake_func=ssl3_connect;
 558                         s->ctx->stats.sess_connect_good++;
 559
 560                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 561
 562                         goto end;
 563                         /* break; */
 564
 565                 default:
 566                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 567                         ret= -1;
 568                         goto end;
 569                         /* break; */
 570                         }
 571
 572                 /* did we do anything */
 573                 if (!s->s3->tmp.reuse_message && !skip)
 574                         {
 575                         if (s->debug)
 576                                 {
 577                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 578                                         goto end;
 579                                 }
 580
 581                         if ((cb != NULL) && (s->state != state))
 582                                 {
 583                                 new_state=s->state;
 584                                 s->state=state;
 585                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 586                                 s->state=new_state;
 587                                 }
 588                         }
 589                 skip=0;
 590                 }
 591 end:
 592         s->in_handshake--;
 593         if (buf != NULL)
 594                 BUF_MEM_free(buf);
 595         if (cb != NULL)
 596                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 597         return(ret);
 598         }
 599
 600
 601 int ssl3_client_hello(SSL *s)
 602         {
 603         unsigned char *buf;
 604         unsigned char *p,*d;
 605         int i;
 606         unsigned long Time,l;
 607 #ifndef OPENSSL_NO_COMP
 608         int j;
 609         SSL_COMP *comp;
 610 #endif
 611
 612         buf=(unsigned char *)s->init_buf->data;
 613         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 614                 {
 615                 SSL_SESSION *sess = s->session;
 616                 if ((sess == NULL) ||
 617                         (sess->ssl_version != s->version) ||
 618 #ifdef OPENSSL_NO_TLSEXT
 619                         !sess->session_id_length ||
 620 #else
 621                         (!sess->session_id_length && !sess->tlsext_tick) ||
 622 #endif
 623                         (sess->not_resumable))
 624                         {
 625                         if (!ssl_get_new_session(s,0))
 626                                 goto err;
 627                         }
 628                 /* else use the pre-loaded session */
 629
 630                 p=s->s3->client_random;
 631                 Time=(unsigned long)time(NULL);                 /* Time */
 632                 l2n(Time,p);
 633                 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
 634                         goto err;
 635
 636                 /* Do the message type and length last */
 637                 d=p= &(buf[4]);
 638
 639                 *(p++)=s->version>>8;
 640                 *(p++)=s->version&0xff;
 641                 s->client_version=s->version;
 642
 643                 /* Random stuff */
 644                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 645                 p+=SSL3_RANDOM_SIZE;
 646
 647                 /* Session ID */
 648                 if (s->new_session)
 649                         i=0;
 650                 else
 651                         i=s->session->session_id_length;
 652                 *(p++)=i;
 653                 if (i != 0)
 654                         {
 655                         if (i > (int)sizeof(s->session->session_id))
 656                                 {
 657                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
 658                                 goto err;
 659                                 }
 660                         memcpy(p,s->session->session_id,i);
 661                         p+=i;
 662                         }
 663
 664                 /* Ciphers supported */
 665                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
 666                 if (i == 0)
 667                         {
 668                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 669                         goto err;
 670                         }
 671                 s2n(i,p);
 672                 p+=i;
 673
 674                 /* COMPRESSION */
 675 #ifdef OPENSSL_NO_COMP
 676                 *(p++)=1;
 677 #else
 678
 679                 if ((s->options & SSL_OP_NO_COMPRESSION)
 680                                         || !s->ctx->comp_methods)
 681                         j=0;
 682                 else
 683                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 684                 *(p++)=1+j;
 685                 for (i=0; i<j; i++)
 686                         {
 687                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 688                         *(p++)=comp->id;
 689                         }
 690 #endif
 691                 *(p++)=0; /* Add the NULL method */
 692
 693 #ifndef OPENSSL_NO_TLSEXT
 694                 /* TLS extensions*/
 695                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
 696                         {
 697                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
 698                         goto err;
 699                         }
 700                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
 701                         {
 702                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
 703                         goto err;
 704                         }
 705 #endif
 706
 707                 l=(p-d);
 708                 d=buf;
 709                 *(d++)=SSL3_MT_CLIENT_HELLO;
 710                 l2n3(l,d);
 711
 712                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 713                 /* number of bytes to write */
 714                 s->init_num=p-buf;
 715                 s->init_off=0;
 716                 }
 717
 718         /* SSL3_ST_CW_CLNT_HELLO_B */
 719         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 720 err:
 721         return(-1);
 722         }
 723
 724 int ssl3_get_server_hello(SSL *s)
 725         {
 726         STACK_OF(SSL_CIPHER) *sk;
 727         const SSL_CIPHER *c;
 728         unsigned char *p,*d;
 729         int i,al,ok;
 730         unsigned int j;
 731         long n;
 732 #ifndef OPENSSL_NO_COMP
 733         SSL_COMP *comp;
 734 #endif
 735
 736         n=s->method->ssl_get_message(s,
 737                 SSL3_ST_CR_SRVR_HELLO_A,
 738                 SSL3_ST_CR_SRVR_HELLO_B,
 739                 -1,
 740                 20000, /* ?? */
 741                 &ok);
 742
 743         if (!ok) return((int)n);
 744
 745         if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 746                 {
 747                 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
 748                         {
 749                         if ( s->d1->send_cookie == 0)
 750                                 {
 751                                 s->s3->tmp.reuse_message = 1;
 752                                 return 1;
 753                                 }
 754                         else /* already sent a cookie */
 755                                 {
 756                                 al=SSL_AD_UNEXPECTED_MESSAGE;
 757                                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
 758                                 goto f_err;
 759                                 }
 760                         }
 761                 }
 762
 763         if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
 764                 {
 765                 al=SSL_AD_UNEXPECTED_MESSAGE;
 766                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
 767                 goto f_err;
 768                 }
 769
 770         d=p=(unsigned char *)s->init_msg;
 771
 772         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 773                 {
 774                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 775                 s->version=(s->version&0xff00)|p[1];
 776                 al=SSL_AD_PROTOCOL_VERSION;
 777                 goto f_err;
 778                 }
 779         p+=2;
 780
 781         /* load the server hello data */
 782         /* load the server random */
 783         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 784         p+=SSL3_RANDOM_SIZE;
 785
 786         /* get the session-id */
 787         j= *(p++);
 788
 789         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
 790                 {
 791                 al=SSL_AD_ILLEGAL_PARAMETER;
 792                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
 793                 goto f_err;
 794                 }
 795
 796 #ifndef OPENSSL_NO_TLSEXT
 797         /* check if we want to resume the session based on external pre-shared secret */
 798         if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
 799                 {
 800                 SSL_CIPHER *pref_cipher=NULL;
 801                 s->session->master_key_length=sizeof(s->session->master_key);
 802                 if (s->tls_session_secret_cb(s, s->session->master_key,
 803                                              &s->session->master_key_length,
 804                                              NULL, &pref_cipher,
 805                                              s->tls_session_secret_cb_arg))
 806                         {
 807                         s->session->cipher = pref_cipher ?
 808                                 pref_cipher : ssl_get_cipher_by_char(s, p+j);
 809                         }
 810                 }
 811 #endif /* OPENSSL_NO_TLSEXT */
 812
 813         if (j != 0 && j == s->session->session_id_length
 814             && memcmp(p,s->session->session_id,j) == 0)
 815             {
 816             if(s->sid_ctx_length != s->session->sid_ctx_length
 817                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 818                 {
 819                 /* actually a client application bug */
 820                 al=SSL_AD_ILLEGAL_PARAMETER;
 821                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 822                 goto f_err;
 823                 }
 824             s->hit=1;
 825             }
 826         else    /* a miss or crap from the other end */
 827                 {
 828                 /* If we were trying for session-id reuse, make a new
 829                  * SSL_SESSION so we don't stuff up other people */
 830                 s->hit=0;
 831                 if (s->session->session_id_length > 0)
 832                         {
 833                         if (!ssl_get_new_session(s,0))
 834                                 {
 835                                 al=SSL_AD_INTERNAL_ERROR;
 836                                 goto f_err;
 837                                 }
 838                         }
 839                 s->session->session_id_length=j;
 840                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 841                 }
 842         p+=j;
 843         c=ssl_get_cipher_by_char(s,p);
 844         if (c == NULL)
 845                 {
 846                 /* unknown cipher */
 847                 al=SSL_AD_ILLEGAL_PARAMETER;
 848                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 849                 goto f_err;
 850                 }
 851         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 852
 853         sk=ssl_get_ciphers_by_id(s);
 854         i=sk_SSL_CIPHER_find(sk,c);
 855         if (i < 0)
 856                 {
 857                 /* we did not say we would use this cipher */
 858                 al=SSL_AD_ILLEGAL_PARAMETER;
 859                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 860                 goto f_err;
 861                 }
 862
 863         /* Depending on the session caching (internal/external), the cipher
 864            and/or cipher_id values may not be set. Make sure that
 865            cipher_id is set and use it for comparison. */
 866         if (s->session->cipher)
 867                 s->session->cipher_id = s->session->cipher->id;
 868         if (s->hit && (s->session->cipher_id != c->id))
 869                 {
 870                 if (!(s->options &
 871                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 872                         {
 873                         al=SSL_AD_ILLEGAL_PARAMETER;
 874                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 875                         goto f_err;
 876                         }
 877                 }
 878         s->s3->tmp.new_cipher=c;
 879         if (!ssl3_digest_cached_records(s))
 880                 goto f_err;
 881
 882         /* lets get the compression algorithm */
 883         /* COMPRESSION */
 884 #ifdef OPENSSL_NO_COMP
 885         if (*(p++) != 0)
 886                 {
 887                 al=SSL_AD_ILLEGAL_PARAMETER;
 888                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 889                 goto f_err;
 890                 }
 891         /* If compression is disabled we'd better not try to resume a session
 892          * using compression.
 893          */
 894         if (s->session->compress_meth != 0)
 895                 {
 896                 al=SSL_AD_INTERNAL_ERROR;
 897                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
 898                 goto f_err;
 899                 }
 900 #else
 901         j= *(p++);
 902         if (s->hit && j != s->session->compress_meth)
 903                 {
 904                 al=SSL_AD_ILLEGAL_PARAMETER;
 905                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
 906                 goto f_err;
 907                 }
 908         if (j == 0)
 909                 comp=NULL;
 910         else if (s->options & SSL_OP_NO_COMPRESSION)
 911                 {
 912                 al=SSL_AD_ILLEGAL_PARAMETER;
 913                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
 914                 goto f_err;
 915                 }
 916         else
 917                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
 918
 919         if ((j != 0) && (comp == NULL))
 920                 {
 921                 al=SSL_AD_ILLEGAL_PARAMETER;
 922                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 923                 goto f_err;
 924                 }
 925         else
 926                 {
 927                 s->s3->tmp.new_compression=comp;
 928                 }
 929 #endif
 930
 931 #ifndef OPENSSL_NO_TLSEXT
 932         /* TLS extensions*/
 933         if (s->version >= SSL3_VERSION)
 934                 {
 935                 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
 936                         {
 937                         /* 'al' set by ssl_parse_serverhello_tlsext */
 938                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
 939                         goto f_err;
 940                         }
 941                 if (ssl_check_serverhello_tlsext(s) <= 0)
 942                         {
 943                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
 944                                 goto err;
 945                         }
 946                 }
 947 #endif
 948
 949         if (p != (d+n))
 950                 {
 951                 /* wrong packet length */
 952                 al=SSL_AD_DECODE_ERROR;
 953                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
 954                 goto err;
 955                 }
 956
 957         return(1);
 958 f_err:
 959         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 960 err:
 961         return(-1);
 962         }
 963
 964 int ssl3_get_server_certificate(SSL *s)
 965         {
 966         int al,i,ok,ret= -1;
 967         unsigned long n,nc,llen,l;
 968         X509 *x=NULL;
 969         const unsigned char *q,*p;
 970         unsigned char *d;
 971         STACK_OF(X509) *sk=NULL;
 972         SESS_CERT *sc;
 973         EVP_PKEY *pkey=NULL;
 974         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
 975
 976         n=s->method->ssl_get_message(s,
 977                 SSL3_ST_CR_CERT_A,
 978                 SSL3_ST_CR_CERT_B,
 979                 -1,
 980                 s->max_cert_list,
 981                 &ok);
 982
 983         if (!ok) return((int)n);
 984
 985         if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
 986                 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
 987                 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
 988                 {
 989                 s->s3->tmp.reuse_message=1;
 990                 return(1);
 991                 }
 992
 993         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
 994                 {
 995                 al=SSL_AD_UNEXPECTED_MESSAGE;
 996                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
 997                 goto f_err;
 998                 }
 999         p=d=(unsigned char *)s->init_msg;
1000
1001         if ((sk=sk_X509_new_null()) == NULL)
1002                 {
1003                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1004                 goto err;
1005                 }
1006
1007         n2l3(p,llen);
1008         if (llen+3 != n)
1009                 {
1010                 al=SSL_AD_DECODE_ERROR;
1011                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1012                 goto f_err;
1013                 }
1014         for (nc=0; nc<llen; )
1015                 {
1016                 n2l3(p,l);
1017                 if ((l+nc+3) > llen)
1018                         {
1019                         al=SSL_AD_DECODE_ERROR;
1020                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1021                         goto f_err;
1022                         }
1023
1024                 q=p;
1025                 x=d2i_X509(NULL,&q,l);
1026                 if (x == NULL)
1027                         {
1028                         al=SSL_AD_BAD_CERTIFICATE;
1029                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1030                         goto f_err;
1031                         }
1032                 if (q != (p+l))
1033                         {
1034                         al=SSL_AD_DECODE_ERROR;
1035                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1036                         goto f_err;
1037                         }
1038                 if (!sk_X509_push(sk,x))
1039                         {
1040                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1041                         goto err;
1042                         }
1043                 x=NULL;
1044                 nc+=l+3;
1045                 p=q;
1046                 }
1047
1048         i=ssl_verify_cert_chain(s,sk);
1049         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1050 #ifndef OPENSSL_NO_KRB5
1051             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1052                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1053 #endif /* OPENSSL_NO_KRB5 */
1054                 )
1055                 {
1056                 al=ssl_verify_alarm_type(s->verify_result);
1057                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1058                 goto f_err;
1059                 }
1060         ERR_clear_error(); /* but we keep s->verify_result */
1061
1062         sc=ssl_sess_cert_new();
1063         if (sc == NULL) goto err;
1064
1065         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1066         s->session->sess_cert=sc;
1067
1068         sc->cert_chain=sk;
1069         /* Inconsistency alert: cert_chain does include the peer's
1070          * certificate, which we don't include in s3_srvr.c */
1071         x=sk_X509_value(sk,0);
1072         sk=NULL;
1073         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1074
1075         pkey=X509_get_pubkey(x);
1076
1077         /* VRS: allow null cert if auth == KRB5 */
1078         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1079                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1080                     ? 0 : 1;
1081
1082 #ifdef KSSL_DEBUG
1083         printf("pkey,x = %p, %p\n", pkey,x);
1084         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1085         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1086                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1087 #endif    /* KSSL_DEBUG */
1088
1089         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1090                 {
1091                 x=NULL;
1092                 al=SSL3_AL_FATAL;
1093                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1094                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1095                 goto f_err;
1096                 }
1097
1098         i=ssl_cert_type(x,pkey);
1099         if (need_cert && i < 0)
1100                 {
1101                 x=NULL;
1102                 al=SSL3_AL_FATAL;
1103                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1104                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1105                 goto f_err;
1106                 }
1107
1108         if (need_cert)
1109                 {
1110                 sc->peer_cert_type=i;
1111                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1112                 /* Why would the following ever happen?
1113                  * We just created sc a couple of lines ago. */
1114                 if (sc->peer_pkeys[i].x509 != NULL)
1115                         X509_free(sc->peer_pkeys[i].x509);
1116                 sc->peer_pkeys[i].x509=x;
1117                 sc->peer_key= &(sc->peer_pkeys[i]);
1118
1119                 if (s->session->peer != NULL)
1120                         X509_free(s->session->peer);
1121                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1122                 s->session->peer=x;
1123                 }
1124         else
1125                 {
1126                 sc->peer_cert_type=i;
1127                 sc->peer_key= NULL;
1128
1129                 if (s->session->peer != NULL)
1130                         X509_free(s->session->peer);
1131                 s->session->peer=NULL;
1132                 }
1133         s->session->verify_result = s->verify_result;
1134
1135         x=NULL;
1136         ret=1;
1137
1138         if (0)
1139                 {
1140 f_err:
1141                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1142                 }
1143 err:
1144         EVP_PKEY_free(pkey);
1145         X509_free(x);
1146         sk_X509_pop_free(sk,X509_free);
1147         return(ret);
1148         }
1149
1150 int ssl3_get_key_exchange(SSL *s)
1151         {
1152 #ifndef OPENSSL_NO_RSA
1153         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1154 #endif
1155         EVP_MD_CTX md_ctx;
1156         unsigned char *param,*p;
1157         int al,i,j,param_len,ok;
1158         long n,alg_k,alg_a;
1159         EVP_PKEY *pkey=NULL;
1160 #ifndef OPENSSL_NO_RSA
1161         RSA *rsa=NULL;
1162 #endif
1163 #ifndef OPENSSL_NO_DH
1164         DH *dh=NULL;
1165 #endif
1166 #ifndef OPENSSL_NO_ECDH
1167         EC_KEY *ecdh = NULL;
1168         BN_CTX *bn_ctx = NULL;
1169         EC_POINT *srvr_ecpoint = NULL;
1170         int curve_nid = 0;
1171         int encoded_pt_len = 0;
1172 #endif
1173
1174         /* use same message size as in ssl3_get_certificate_request()
1175          * as ServerKeyExchange message may be skipped */
1176         n=s->method->ssl_get_message(s,
1177                 SSL3_ST_CR_KEY_EXCH_A,
1178                 SSL3_ST_CR_KEY_EXCH_B,
1179                 -1,
1180                 s->max_cert_list,
1181                 &ok);
1182         if (!ok) return((int)n);
1183
1184         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1185                 {
1186 #ifndef OPENSSL_NO_PSK
1187                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1188                    omitted if no identity hint is sent. Set
1189                    session->sess_cert anyway to avoid problems
1190                    later.*/
1191                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1192                         {
1193                         s->session->sess_cert=ssl_sess_cert_new();
1194                         if (s->ctx->psk_identity_hint)
1195                                 OPENSSL_free(s->ctx->psk_identity_hint);
1196                         s->ctx->psk_identity_hint = NULL;
1197                         }
1198 #endif
1199                 s->s3->tmp.reuse_message=1;
1200                 return(1);
1201                 }
1202
1203         param=p=(unsigned char *)s->init_msg;
1204         if (s->session->sess_cert != NULL)
1205                 {
1206 #ifndef OPENSSL_NO_RSA
1207                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1208                         {
1209                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1210                         s->session->sess_cert->peer_rsa_tmp=NULL;
1211                         }
1212 #endif
1213 #ifndef OPENSSL_NO_DH
1214                 if (s->session->sess_cert->peer_dh_tmp)
1215                         {
1216                         DH_free(s->session->sess_cert->peer_dh_tmp);
1217                         s->session->sess_cert->peer_dh_tmp=NULL;
1218                         }
1219 #endif
1220 #ifndef OPENSSL_NO_ECDH
1221                 if (s->session->sess_cert->peer_ecdh_tmp)
1222                         {
1223                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1224                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1225                         }
1226 #endif
1227                 }
1228         else
1229                 {
1230                 s->session->sess_cert=ssl_sess_cert_new();
1231                 }
1232
1233         param_len=0;
1234         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1235         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1236         EVP_MD_CTX_init(&md_ctx);
1237
1238 #ifndef OPENSSL_NO_PSK
1239         if (alg_k & SSL_kPSK)
1240                 {
1241                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1242
1243                 al=SSL_AD_HANDSHAKE_FAILURE;
1244                 n2s(p,i);
1245                 param_len=i+2;
1246                 /* Store PSK identity hint for later use, hint is used
1247                  * in ssl3_send_client_key_exchange.  Assume that the
1248                  * maximum length of a PSK identity hint can be as
1249                  * long as the maximum length of a PSK identity. */
1250                 if (i > PSK_MAX_IDENTITY_LEN)
1251                         {
1252                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1253                                 SSL_R_DATA_LENGTH_TOO_LONG);
1254                         goto f_err;
1255                         }
1256                 if (param_len > n)
1257                         {
1258                         al=SSL_AD_DECODE_ERROR;
1259                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1260                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1261                         goto f_err;
1262                         }
1263                 /* If received PSK identity hint contains NULL
1264                  * characters, the hint is truncated from the first
1265                  * NULL. p may not be ending with NULL, so create a
1266                  * NULL-terminated string. */
1267                 memcpy(tmp_id_hint, p, i);
1268                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1269                 if (s->ctx->psk_identity_hint != NULL)
1270                         OPENSSL_free(s->ctx->psk_identity_hint);
1271                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1272                 if (s->ctx->psk_identity_hint == NULL)
1273                         {
1274                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1275                         goto f_err;
1276                         }
1277
1278                 p+=i;
1279                 n-=param_len;
1280                 }
1281         else
1282 #endif /* !OPENSSL_NO_PSK */
1283 #ifndef OPENSSL_NO_RSA
1284         if (alg_k & SSL_kRSA)
1285                 {
1286                 if ((rsa=RSA_new()) == NULL)
1287                         {
1288                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1289                         goto err;
1290                         }
1291                 n2s(p,i);
1292                 param_len=i+2;
1293                 if (param_len > n)
1294                         {
1295                         al=SSL_AD_DECODE_ERROR;
1296                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1297                         goto f_err;
1298                         }
1299                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1300                         {
1301                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1302                         goto err;
1303                         }
1304                 p+=i;
1305
1306                 n2s(p,i);
1307                 param_len+=i+2;
1308                 if (param_len > n)
1309                         {
1310                         al=SSL_AD_DECODE_ERROR;
1311                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1312                         goto f_err;
1313                         }
1314                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1315                         {
1316                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1317                         goto err;
1318                         }
1319                 p+=i;
1320                 n-=param_len;
1321
1322                 /* this should be because we are using an export cipher */
1323                 if (alg_a & SSL_aRSA)
1324                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1325                 else
1326                         {
1327                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1328                         goto err;
1329                         }
1330                 s->session->sess_cert->peer_rsa_tmp=rsa;
1331                 rsa=NULL;
1332                 }
1333 #else /* OPENSSL_NO_RSA */
1334         if (0)
1335                 ;
1336 #endif
1337 #ifndef OPENSSL_NO_DH
1338         else if (alg_k & SSL_kEDH)
1339                 {
1340                 if ((dh=DH_new()) == NULL)
1341                         {
1342                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1343                         goto err;
1344                         }
1345                 n2s(p,i);
1346                 param_len=i+2;
1347                 if (param_len > n)
1348                         {
1349                         al=SSL_AD_DECODE_ERROR;
1350                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1351                         goto f_err;
1352                         }
1353                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1354                         {
1355                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1356                         goto err;
1357                         }
1358                 p+=i;
1359
1360                 n2s(p,i);
1361                 param_len+=i+2;
1362                 if (param_len > n)
1363                         {
1364                         al=SSL_AD_DECODE_ERROR;
1365                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1366                         goto f_err;
1367                         }
1368                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1369                         {
1370                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1371                         goto err;
1372                         }
1373                 p+=i;
1374
1375                 n2s(p,i);
1376                 param_len+=i+2;
1377                 if (param_len > n)
1378                         {
1379                         al=SSL_AD_DECODE_ERROR;
1380                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1381                         goto f_err;
1382                         }
1383                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1384                         {
1385                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1386                         goto err;
1387                         }
1388                 p+=i;
1389                 n-=param_len;
1390
1391 #ifndef OPENSSL_NO_RSA
1392                 if (alg_a & SSL_aRSA)
1393                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1394 #else
1395                 if (0)
1396                         ;
1397 #endif
1398 #ifndef OPENSSL_NO_DSA
1399                 else if (alg_a & SSL_aDSS)
1400                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1401 #endif
1402                 /* else anonymous DH, so no certificate or pkey. */
1403
1404                 s->session->sess_cert->peer_dh_tmp=dh;
1405                 dh=NULL;
1406                 }
1407         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1408                 {
1409                 al=SSL_AD_ILLEGAL_PARAMETER;
1410                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1411                 goto f_err;
1412                 }
1413 #endif /* !OPENSSL_NO_DH */
1414
1415 #ifndef OPENSSL_NO_ECDH
1416         else if (alg_k & SSL_kEECDH)
1417                 {
1418                 EC_GROUP *ngroup;
1419                 const EC_GROUP *group;
1420
1421                 if ((ecdh=EC_KEY_new()) == NULL)
1422                         {
1423                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1424                         goto err;
1425                         }
1426
1427                 /* Extract elliptic curve parameters and the
1428                  * server's ephemeral ECDH public key.
1429                  * Keep accumulating lengths of various components in
1430                  * param_len and make sure it never exceeds n.
1431                  */
1432
1433                 /* XXX: For now we only support named (not generic) curves
1434                  * and the ECParameters in this case is just three bytes.
1435                  */
1436                 param_len=3;
1437                 if ((param_len > n) ||
1438                     (*p != NAMED_CURVE_TYPE) ||
1439                     ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1440                         {
1441                         al=SSL_AD_INTERNAL_ERROR;
1442                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1443                         goto f_err;
1444                         }
1445
1446                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1447                 if (ngroup == NULL)
1448                         {
1449                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1450                         goto err;
1451                         }
1452                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1453                         {
1454                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1455                         goto err;
1456                         }
1457                 EC_GROUP_free(ngroup);
1458
1459                 group = EC_KEY_get0_group(ecdh);
1460
1461                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1462                     (EC_GROUP_get_degree(group) > 163))
1463                         {
1464                         al=SSL_AD_EXPORT_RESTRICTION;
1465                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1466                         goto f_err;
1467                         }
1468
1469                 p+=3;
1470
1471                 /* Next, get the encoded ECPoint */
1472                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1473                     ((bn_ctx = BN_CTX_new()) == NULL))
1474                         {
1475                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1476                         goto err;
1477                         }
1478
1479                 encoded_pt_len = *p;  /* length of encoded point */
1480                 p+=1;
1481                 param_len += (1 + encoded_pt_len);
1482                 if ((param_len > n) ||
1483                     (EC_POINT_oct2point(group, srvr_ecpoint,
1484                         p, encoded_pt_len, bn_ctx) == 0))
1485                         {
1486                         al=SSL_AD_DECODE_ERROR;
1487                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1488                         goto f_err;
1489                         }
1490
1491                 n-=param_len;
1492                 p+=encoded_pt_len;
1493
1494                 /* The ECC/TLS specification does not mention
1495                  * the use of DSA to sign ECParameters in the server
1496                  * key exchange message. We do support RSA and ECDSA.
1497                  */
1498                 if (0) ;
1499 #ifndef OPENSSL_NO_RSA
1500                 else if (alg_a & SSL_aRSA)
1501                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1502 #endif
1503 #ifndef OPENSSL_NO_ECDSA
1504                 else if (alg_a & SSL_aECDSA)
1505                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1506 #endif
1507                 /* else anonymous ECDH, so no certificate or pkey. */
1508                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1509                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1510                 ecdh=NULL;
1511                 BN_CTX_free(bn_ctx);
1512                 bn_ctx = NULL;
1513                 EC_POINT_free(srvr_ecpoint);
1514                 srvr_ecpoint = NULL;
1515                 }
1516         else if (alg_k)
1517                 {
1518                 al=SSL_AD_UNEXPECTED_MESSAGE;
1519                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1520                 goto f_err;
1521                 }
1522 #endif /* !OPENSSL_NO_ECDH */
1523
1524
1525         /* p points to the next byte, there are 'n' bytes left */
1526
1527         /* if it was signed, check the signature */
1528         if (pkey != NULL)
1529                 {
1530                 n2s(p,i);
1531                 n-=2;
1532                 j=EVP_PKEY_size(pkey);
1533
1534                 if ((i != n) || (n > j) || (n <= 0))
1535                         {
1536                         /* wrong packet length */
1537                         al=SSL_AD_DECODE_ERROR;
1538                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1539                         goto f_err;
1540                         }
1541
1542 #ifndef OPENSSL_NO_RSA
1543                 if (pkey->type == EVP_PKEY_RSA)
1544                         {
1545                         int num;
1546
1547                         j=0;
1548                         q=md_buf;
1549                         for (num=2; num > 0; num--)
1550                                 {
1551                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1552                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1553                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1554                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1555                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1556                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1557                                 q+=i;
1558                                 j+=i;
1559                                 }
1560                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1561                                                                 pkey->pkey.rsa);
1562                         if (i < 0)
1563                                 {
1564                                 al=SSL_AD_DECRYPT_ERROR;
1565                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1566                                 goto f_err;
1567                                 }
1568                         if (i == 0)
1569                                 {
1570                                 /* bad signature */
1571                                 al=SSL_AD_DECRYPT_ERROR;
1572                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1573                                 goto f_err;
1574                                 }
1575                         }
1576                 else
1577 #endif
1578 #ifndef OPENSSL_NO_DSA
1579                         if (pkey->type == EVP_PKEY_DSA)
1580                         {
1581                         /* lets do DSS */
1582                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1583                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1584                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1585                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1586                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1587                                 {
1588                                 /* bad signature */
1589                                 al=SSL_AD_DECRYPT_ERROR;
1590                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1591                                 goto f_err;
1592                                 }
1593                         }
1594                 else
1595 #endif
1596 #ifndef OPENSSL_NO_ECDSA
1597                         if (pkey->type == EVP_PKEY_EC)
1598                         {
1599                         /* let's do ECDSA */
1600                         EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1601                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1602                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1603                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1604                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1605                                 {
1606                                 /* bad signature */
1607                                 al=SSL_AD_DECRYPT_ERROR;
1608                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1609                                 goto f_err;
1610                                 }
1611                         }
1612                 else
1613 #endif
1614                         {
1615                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1616                         goto err;
1617                         }
1618                 }
1619         else
1620                 {
1621                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1622                         /* aNULL or kPSK do not need public keys */
1623                         {
1624                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1625                         goto err;
1626                         }
1627                 /* still data left over */
1628                 if (n != 0)
1629                         {
1630                         al=SSL_AD_DECODE_ERROR;
1631                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1632                         goto f_err;
1633                         }
1634                 }
1635         EVP_PKEY_free(pkey);
1636         EVP_MD_CTX_cleanup(&md_ctx);
1637         return(1);
1638 f_err:
1639         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1640 err:
1641         EVP_PKEY_free(pkey);
1642 #ifndef OPENSSL_NO_RSA
1643         if (rsa != NULL)
1644                 RSA_free(rsa);
1645 #endif
1646 #ifndef OPENSSL_NO_DH
1647         if (dh != NULL)
1648                 DH_free(dh);
1649 #endif
1650 #ifndef OPENSSL_NO_ECDH
1651         BN_CTX_free(bn_ctx);
1652         EC_POINT_free(srvr_ecpoint);
1653         if (ecdh != NULL)
1654                 EC_KEY_free(ecdh);
1655 #endif
1656         EVP_MD_CTX_cleanup(&md_ctx);
1657         return(-1);
1658         }
1659
1660 int ssl3_get_certificate_request(SSL *s)
1661         {
1662         int ok,ret=0;
1663         unsigned long n,nc,l;
1664         unsigned int llen,ctype_num,i;
1665         X509_NAME *xn=NULL;
1666         const unsigned char *p,*q;
1667         unsigned char *d;
1668         STACK_OF(X509_NAME) *ca_sk=NULL;
1669
1670         n=s->method->ssl_get_message(s,
1671                 SSL3_ST_CR_CERT_REQ_A,
1672                 SSL3_ST_CR_CERT_REQ_B,
1673                 -1,
1674                 s->max_cert_list,
1675                 &ok);
1676
1677         if (!ok) return((int)n);
1678
1679         s->s3->tmp.cert_req=0;
1680
1681         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1682                 {
1683                 s->s3->tmp.reuse_message=1;
1684                 return(1);
1685                 }
1686
1687         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1688                 {
1689                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1690                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1691                 goto err;
1692                 }
1693
1694         /* TLS does not like anon-DH with client cert */
1695         if (s->version > SSL3_VERSION)
1696                 {
1697                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1698                         {
1699                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1700                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1701                         goto err;
1702                         }
1703                 }
1704
1705         p=d=(unsigned char *)s->init_msg;
1706
1707         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1708                 {
1709                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1710                 goto err;
1711                 }
1712
1713         /* get the certificate types */
1714         ctype_num= *(p++);
1715         if (ctype_num > SSL3_CT_NUMBER)
1716                 ctype_num=SSL3_CT_NUMBER;
1717         for (i=0; i<ctype_num; i++)
1718                 s->s3->tmp.ctype[i]= p[i];
1719         p+=ctype_num;
1720
1721         /* get the CA RDNs */
1722         n2s(p,llen);
1723 #if 0
1724 {
1725 FILE *out;
1726 out=fopen("/tmp/vsign.der","w");
1727 fwrite(p,1,llen,out);
1728 fclose(out);
1729 }
1730 #endif
1731
1732         if ((llen+ctype_num+2+1) != n)
1733                 {
1734                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1735                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1736                 goto err;
1737                 }
1738
1739         for (nc=0; nc<llen; )
1740                 {
1741                 n2s(p,l);
1742                 if ((l+nc+2) > llen)
1743                         {
1744                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1745                                 goto cont; /* netscape bugs */
1746                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1747                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1748                         goto err;
1749                         }
1750
1751                 q=p;
1752
1753                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1754                         {
1755                         /* If netscape tolerance is on, ignore errors */
1756                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1757                                 goto cont;
1758                         else
1759                                 {
1760                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1761                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1762                                 goto err;
1763                                 }
1764                         }
1765
1766                 if (q != (p+l))
1767                         {
1768                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1769                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1770                         goto err;
1771                         }
1772                 if (!sk_X509_NAME_push(ca_sk,xn))
1773                         {
1774                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1775                         goto err;
1776                         }
1777
1778                 p+=l;
1779                 nc+=l+2;
1780                 }
1781
1782         if (0)
1783                 {
1784 cont:
1785                 ERR_clear_error();
1786                 }
1787
1788         /* we should setup a certificate to return.... */
1789         s->s3->tmp.cert_req=1;
1790         s->s3->tmp.ctype_num=ctype_num;
1791         if (s->s3->tmp.ca_names != NULL)
1792                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1793         s->s3->tmp.ca_names=ca_sk;
1794         ca_sk=NULL;
1795
1796         ret=1;
1797 err:
1798         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1799         return(ret);
1800         }
1801
1802 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1803         {
1804         return(X509_NAME_cmp(*a,*b));
1805         }
1806 #ifndef OPENSSL_NO_TLSEXT
1807 int ssl3_get_new_session_ticket(SSL *s)
1808         {
1809         int ok,al,ret=0, ticklen;
1810         long n;
1811         const unsigned char *p;
1812         unsigned char *d;
1813
1814         n=s->method->ssl_get_message(s,
1815                 SSL3_ST_CR_SESSION_TICKET_A,
1816                 SSL3_ST_CR_SESSION_TICKET_B,
1817                 -1,
1818                 16384,
1819                 &ok);
1820
1821         if (!ok)
1822                 return((int)n);
1823
1824         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1825                 {
1826                 s->s3->tmp.reuse_message=1;
1827                 return(1);
1828                 }
1829         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1830                 {
1831                 al=SSL_AD_UNEXPECTED_MESSAGE;
1832                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1833                 goto f_err;
1834                 }
1835         if (n < 6)
1836                 {
1837                 /* need at least ticket_lifetime_hint + ticket length */
1838                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1839                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1840                 goto f_err;
1841                 }
1842
1843         p=d=(unsigned char *)s->init_msg;
1844         n2l(p, s->session->tlsext_tick_lifetime_hint);
1845         n2s(p, ticklen);
1846         /* ticket_lifetime_hint + ticket_length + ticket */
1847         if (ticklen + 6 != n)
1848                 {
1849                 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1850                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1851                 goto f_err;
1852                 }
1853         if (s->session->tlsext_tick)
1854                 {
1855                 OPENSSL_free(s->session->tlsext_tick);
1856                 s->session->tlsext_ticklen = 0;
1857                 }
1858         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1859         if (!s->session->tlsext_tick)
1860                 {
1861                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1862                 goto err;
1863                 }
1864         memcpy(s->session->tlsext_tick, p, ticklen);
1865         s->session->tlsext_ticklen = ticklen;
1866         /* There are two ways to detect a resumed ticket sesion.
1867          * One is to set an appropriate session ID and then the server
1868          * must return a match in ServerHello. This allows the normal
1869          * client session ID matching to work and we know much
1870          * earlier that the ticket has been accepted.
1871          *
1872          * The other way is to set zero length session ID when the
1873          * ticket is presented and rely on the handshake to determine
1874          * session resumption.
1875          *
1876          * We choose the former approach because this fits in with
1877          * assumptions elsewhere in OpenSSL. The session ID is set
1878          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1879          * ticket.
1880          */
1881         EVP_Digest(p, ticklen,
1882                         s->session->session_id, &s->session->session_id_length,
1883 #ifndef OPENSSL_NO_SHA256
1884                                                         EVP_sha256(), NULL);
1885 #else
1886                                                         EVP_sha1(), NULL);
1887 #endif
1888         ret=1;
1889         return(ret);
1890 f_err:
1891         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1892 err:
1893         return(-1);
1894         }
1895
1896 int ssl3_get_cert_status(SSL *s)
1897         {
1898         int ok, al;
1899         unsigned long resplen,n;
1900         const unsigned char *p;
1901
1902         n=s->method->ssl_get_message(s,
1903                 SSL3_ST_CR_CERT_STATUS_A,
1904                 SSL3_ST_CR_CERT_STATUS_B,
1905                 SSL3_MT_CERTIFICATE_STATUS,
1906                 16384,
1907                 &ok);
1908
1909         if (!ok) return((int)n);
1910         if (n < 4)
1911                 {
1912                 /* need at least status type + length */
1913                 al = SSL_AD_DECODE_ERROR;
1914                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1915                 goto f_err;
1916                 }
1917         p = (unsigned char *)s->init_msg;
1918         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1919                 {
1920                 al = SSL_AD_DECODE_ERROR;
1921                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1922                 goto f_err;
1923                 }
1924         n2l3(p, resplen);
1925         if (resplen + 4 != n)
1926                 {
1927                 al = SSL_AD_DECODE_ERROR;
1928                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1929                 goto f_err;
1930                 }
1931         if (s->tlsext_ocsp_resp)
1932                 OPENSSL_free(s->tlsext_ocsp_resp);
1933         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1934         if (!s->tlsext_ocsp_resp)
1935                 {
1936                 al = SSL_AD_INTERNAL_ERROR;
1937                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1938                 goto f_err;
1939                 }
1940         s->tlsext_ocsp_resplen = resplen;
1941         if (s->ctx->tlsext_status_cb)
1942                 {
1943                 int ret;
1944                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1945                 if (ret == 0)
1946                         {
1947                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1948                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1949                         goto f_err;
1950                         }
1951                 if (ret < 0)
1952                         {
1953                         al = SSL_AD_INTERNAL_ERROR;
1954                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1955                         goto f_err;
1956                         }
1957                 }
1958         return 1;
1959 f_err:
1960         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1961         return(-1);
1962         }
1963 #endif
1964
1965 int ssl3_get_server_done(SSL *s)
1966         {
1967         int ok,ret=0;
1968         long n;
1969
1970         n=s->method->ssl_get_message(s,
1971                 SSL3_ST_CR_SRVR_DONE_A,
1972                 SSL3_ST_CR_SRVR_DONE_B,
1973                 SSL3_MT_SERVER_DONE,
1974                 30, /* should be very small, like 0 :-) */
1975                 &ok);
1976
1977         if (!ok) return((int)n);
1978         if (n > 0)
1979                 {
1980                 /* should contain no data */
1981                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1982                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1983                 return -1;
1984                 }
1985         ret=1;
1986         return(ret);
1987         }
1988
1989
1990 int ssl3_send_client_key_exchange(SSL *s)
1991         {
1992         unsigned char *p,*d;
1993         int n;
1994         unsigned long alg_k;
1995 #ifndef OPENSSL_NO_RSA
1996         unsigned char *q;
1997         EVP_PKEY *pkey=NULL;
1998 #endif
1999 #ifndef OPENSSL_NO_KRB5
2000         KSSL_ERR kssl_err;
2001 #endif /* OPENSSL_NO_KRB5 */
2002 #ifndef OPENSSL_NO_ECDH
2003         EC_KEY *clnt_ecdh = NULL;
2004         const EC_POINT *srvr_ecpoint = NULL;
2005         EVP_PKEY *srvr_pub_pkey = NULL;
2006         unsigned char *encodedPoint = NULL;
2007         int encoded_pt_len = 0;
2008         BN_CTX * bn_ctx = NULL;
2009 #endif
2010
2011         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2012                 {
2013                 d=(unsigned char *)s->init_buf->data;
2014                 p= &(d[4]);
2015
2016                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2017
2018                 /* Fool emacs indentation */
2019                 if (0) {}
2020 #ifndef OPENSSL_NO_RSA
2021                 else if (alg_k & SSL_kRSA)
2022                         {
2023                         RSA *rsa;
2024                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2025
2026                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2027                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2028                         else
2029                                 {
2030                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2031                                 if ((pkey == NULL) ||
2032                                         (pkey->type != EVP_PKEY_RSA) ||
2033                                         (pkey->pkey.rsa == NULL))
2034                                         {
2035                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2036                                         goto err;
2037                                         }
2038                                 rsa=pkey->pkey.rsa;
2039                                 EVP_PKEY_free(pkey);
2040                                 }
2041
2042                         tmp_buf[0]=s->client_version>>8;
2043                         tmp_buf[1]=s->client_version&0xff;
2044                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2045                                         goto err;
2046
2047                         s->session->master_key_length=sizeof tmp_buf;
2048
2049                         q=p;
2050                         /* Fix buf for TLS and beyond */
2051                         if (s->version > SSL3_VERSION)
2052                                 p+=2;
2053                         n=RSA_public_encrypt(sizeof tmp_buf,
2054                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2055 #ifdef PKCS1_CHECK
2056                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2057                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2058 #endif
2059                         if (n <= 0)
2060                                 {
2061                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2062                                 goto err;
2063                                 }
2064
2065                         /* Fix buf for TLS and beyond */
2066                         if (s->version > SSL3_VERSION)
2067                                 {
2068                                 s2n(n,q);
2069                                 n+=2;
2070                                 }
2071
2072                         s->session->master_key_length=
2073                                 s->method->ssl3_enc->generate_master_secret(s,
2074                                         s->session->master_key,
2075                                         tmp_buf,sizeof tmp_buf);
2076                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2077                         }
2078 #endif
2079 #ifndef OPENSSL_NO_KRB5
2080                 else if (alg_k & SSL_kKRB5)
2081                         {
2082                         krb5_error_code krb5rc;
2083                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2084                         /*  krb5_data   krb5_ap_req;  */
2085                         krb5_data       *enc_ticket;
2086                         krb5_data       authenticator, *authp = NULL;
2087                         EVP_CIPHER_CTX  ciph_ctx;
2088                         const EVP_CIPHER *enc = NULL;
2089                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2090                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2091                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
2092                                                 + EVP_MAX_IV_LENGTH];
2093                         int             padl, outl = sizeof(epms);
2094
2095                         EVP_CIPHER_CTX_init(&ciph_ctx);
2096
2097 #ifdef KSSL_DEBUG
2098                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2099                                 alg_k, SSL_kKRB5);
2100 #endif  /* KSSL_DEBUG */
2101
2102                         authp = NULL;
2103 #ifdef KRB5SENDAUTH
2104                         if (KRB5SENDAUTH)  authp = &authenticator;
2105 #endif  /* KRB5SENDAUTH */
2106
2107                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2108                                 &kssl_err);
2109                         enc = kssl_map_enc(kssl_ctx->enctype);
2110                         if (enc == NULL)
2111                             goto err;
2112 #ifdef KSSL_DEBUG
2113                         {
2114                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2115                         if (krb5rc && kssl_err.text)
2116                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2117                         }
2118 #endif  /* KSSL_DEBUG */
2119
2120                         if (krb5rc)
2121                                 {
2122                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2123                                                 SSL_AD_HANDSHAKE_FAILURE);
2124                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2125                                                 kssl_err.reason);
2126                                 goto err;
2127                                 }
2128
2129                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2130                         **  in place of RFC 2712 KerberosWrapper, as in:
2131                         **
2132                         **  Send ticket (copy to *p, set n = length)
2133                         **  n = krb5_ap_req.length;
2134                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2135                         **  if (krb5_ap_req.data)
2136                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2137                         **
2138                         **  Now using real RFC 2712 KerberosWrapper
2139                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2140                         **  Note: 2712 "opaque" types are here replaced
2141                         **  with a 2-byte length followed by the value.
2142                         **  Example:
2143                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2144                         **  Where "xx xx" = length bytes.  Shown here with
2145                         **  optional authenticator omitted.
2146                         */
2147
2148                         /*  KerberosWrapper.Ticket              */
2149                         s2n(enc_ticket->length,p);
2150                         memcpy(p, enc_ticket->data, enc_ticket->length);
2151                         p+= enc_ticket->length;
2152                         n = enc_ticket->length + 2;
2153
2154                         /*  KerberosWrapper.Authenticator       */
2155                         if (authp  &&  authp->length)
2156                                 {
2157                                 s2n(authp->length,p);
2158                                 memcpy(p, authp->data, authp->length);
2159                                 p+= authp->length;
2160                                 n+= authp->length + 2;
2161
2162                                 free(authp->data);
2163                                 authp->data = NULL;
2164                                 authp->length = 0;
2165                                 }
2166                         else
2167                                 {
2168                                 s2n(0,p);/*  null authenticator length  */
2169                                 n+=2;
2170                                 }
2171
2172                             tmp_buf[0]=s->client_version>>8;
2173                             tmp_buf[1]=s->client_version&0xff;
2174                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2175                                 goto err;
2176
2177                         /*  20010420 VRS.  Tried it this way; failed.
2178                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2179                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2180                         **                              kssl_ctx->length);
2181                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2182                         */
2183
2184                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2185                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2186                                 kssl_ctx->key,iv);
2187                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2188                                 sizeof tmp_buf);
2189                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2190                         outl += padl;
2191                         if (outl > (int)sizeof epms)
2192                                 {
2193                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2194                                 goto err;
2195                                 }
2196                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2197
2198                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2199                         s2n(outl,p);
2200                         memcpy(p, epms, outl);
2201                         p+=outl;
2202                         n+=outl + 2;
2203
2204                         s->session->master_key_length=
2205                                 s->method->ssl3_enc->generate_master_secret(s,
2206                                         s->session->master_key,
2207                                         tmp_buf, sizeof tmp_buf);
2208
2209                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2210                         OPENSSL_cleanse(epms, outl);
2211                         }
2212 #endif
2213 #ifndef OPENSSL_NO_DH
2214                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2215                         {
2216                         DH *dh_srvr,*dh_clnt;
2217
2218                         if (s->session->sess_cert == NULL)
2219                                 {
2220                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2221                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2222                                 goto err;
2223                                 }
2224
2225                         if (s->session->sess_cert->peer_dh_tmp != NULL)
2226                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2227                         else
2228                                 {
2229                                 /* we get them from the cert */
2230                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2231                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2232                                 goto err;
2233                                 }
2234
2235                         /* generate a new random key */
2236                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2237                                 {
2238                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2239                                 goto err;
2240                                 }
2241                         if (!DH_generate_key(dh_clnt))
2242                                 {
2243                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2244                                 goto err;
2245                                 }
2246
2247                         /* use the 'p' output buffer for the DH key, but
2248                          * make sure to clear it out afterwards */
2249
2250                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2251
2252                         if (n <= 0)
2253                                 {
2254                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2255                                 goto err;
2256                                 }
2257
2258                         /* generate master key from the result */
2259                         s->session->master_key_length=
2260                                 s->method->ssl3_enc->generate_master_secret(s,
2261                                         s->session->master_key,p,n);
2262                         /* clean up */
2263                         memset(p,0,n);
2264
2265                         /* send off the data */
2266                         n=BN_num_bytes(dh_clnt->pub_key);
2267                         s2n(n,p);
2268                         BN_bn2bin(dh_clnt->pub_key,p);
2269                         n+=2;
2270
2271                         DH_free(dh_clnt);
2272
2273                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2274                         }
2275 #endif
2276
2277 #ifndef OPENSSL_NO_ECDH
2278                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2279                         {
2280                         const EC_GROUP *srvr_group = NULL;
2281                         EC_KEY *tkey;
2282                         int ecdh_clnt_cert = 0;
2283                         int field_size = 0;
2284
2285                         /* Did we send out the client's
2286                          * ECDH share for use in premaster
2287                          * computation as part of client certificate?
2288                          * If so, set ecdh_clnt_cert to 1.
2289                          */
2290                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2291                                 {
2292                                 /* XXX: For now, we do not support client
2293                                  * authentication using ECDH certificates.
2294                                  * To add such support, one needs to add
2295                                  * code that checks for appropriate
2296                                  * conditions and sets ecdh_clnt_cert to 1.
2297                                  * For example, the cert have an ECC
2298                                  * key on the same curve as the server's
2299                                  * and the key should be authorized for
2300                                  * key agreement.
2301                                  *
2302                                  * One also needs to add code in ssl3_connect
2303                                  * to skip sending the certificate verify
2304                                  * message.
2305                                  *
2306                                  * if ((s->cert->key->privatekey != NULL) &&
2307                                  *     (s->cert->key->privatekey->type ==
2308                                  *      EVP_PKEY_EC) && ...)
2309                                  * ecdh_clnt_cert = 1;
2310                                  */
2311                                 }
2312
2313                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2314                                 {
2315                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2316                                 }
2317                         else
2318                                 {
2319                                 /* Get the Server Public Key from Cert */
2320                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2321                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2322                                 if ((srvr_pub_pkey == NULL) ||
2323                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2324                                     (srvr_pub_pkey->pkey.ec == NULL))
2325                                         {
2326                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2327                                             ERR_R_INTERNAL_ERROR);
2328                                         goto err;
2329                                         }
2330
2331                                 tkey = srvr_pub_pkey->pkey.ec;
2332                                 }
2333
2334                         srvr_group   = EC_KEY_get0_group(tkey);
2335                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2336
2337                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2338                                 {
2339                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2340                                     ERR_R_INTERNAL_ERROR);
2341                                 goto err;
2342                                 }
2343
2344                         if ((clnt_ecdh=EC_KEY_new()) == NULL)
2345                                 {
2346                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2347                                 goto err;
2348                                 }
2349
2350                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2351                                 {
2352                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2353                                 goto err;
2354                                 }
2355                         if (ecdh_clnt_cert)
2356                                 {
2357                                 /* Reuse key info from our certificate
2358                                  * We only need our private key to perform
2359                                  * the ECDH computation.
2360                                  */
2361                                 const BIGNUM *priv_key;
2362                                 tkey = s->cert->key->privatekey->pkey.ec;
2363                                 priv_key = EC_KEY_get0_private_key(tkey);
2364                                 if (priv_key == NULL)
2365                                         {
2366                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2367                                         goto err;
2368                                         }
2369                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2370                                         {
2371                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2372                                         goto err;
2373                                         }
2374                                 }
2375                         else
2376                                 {
2377                                 /* Generate a new ECDH key pair */
2378                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2379                                         {
2380                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2381                                         goto err;
2382                                         }
2383                                 }
2384
2385                         /* use the 'p' output buffer for the ECDH key, but
2386                          * make sure to clear it out afterwards
2387                          */
2388
2389                         field_size = EC_GROUP_get_degree(srvr_group);
2390                         if (field_size <= 0)
2391                                 {
2392                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2393                                        ERR_R_ECDH_LIB);
2394                                 goto err;
2395                                 }
2396                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2397                         if (n <= 0)
2398                                 {
2399                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2400                                        ERR_R_ECDH_LIB);
2401                                 goto err;
2402                                 }
2403
2404                         /* generate master key from the result */
2405                         s->session->master_key_length = s->method->ssl3_enc \
2406                             -> generate_master_secret(s,
2407                                 s->session->master_key,
2408                                 p, n);
2409
2410                         memset(p, 0, n); /* clean up */
2411
2412                         if (ecdh_clnt_cert)
2413                                 {
2414                                 /* Send empty client key exch message */
2415                                 n = 0;
2416                                 }
2417                         else
2418                                 {
2419                                 /* First check the size of encoding and
2420                                  * allocate memory accordingly.
2421                                  */
2422                                 encoded_pt_len =
2423                                     EC_POINT_point2oct(srvr_group,
2424                                         EC_KEY_get0_public_key(clnt_ecdh),
2425                                         POINT_CONVERSION_UNCOMPRESSED,
2426                                         NULL, 0, NULL);
2427
2428                                 encodedPoint = (unsigned char *)
2429                                     OPENSSL_malloc(encoded_pt_len *
2430                                         sizeof(unsigned char));
2431                                 bn_ctx = BN_CTX_new();
2432                                 if ((encodedPoint == NULL) ||
2433                                     (bn_ctx == NULL))
2434                                         {
2435                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2436                                         goto err;
2437                                         }
2438
2439                                 /* Encode the public key */
2440                                 n = EC_POINT_point2oct(srvr_group,
2441                                     EC_KEY_get0_public_key(clnt_ecdh),
2442                                     POINT_CONVERSION_UNCOMPRESSED,
2443                                     encodedPoint, encoded_pt_len, bn_ctx);
2444
2445                                 *p = n; /* length of encoded point */
2446                                 /* Encoded point will be copied here */
2447                                 p += 1;
2448                                 /* copy the point */
2449                                 memcpy((unsigned char *)p, encodedPoint, n);
2450                                 /* increment n to account for length field */
2451                                 n += 1;
2452                                 }
2453
2454                         /* Free allocated memory */
2455                         BN_CTX_free(bn_ctx);
2456                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2457                         if (clnt_ecdh != NULL)
2458                                  EC_KEY_free(clnt_ecdh);
2459                         EVP_PKEY_free(srvr_pub_pkey);
2460                         }
2461 #endif /* !OPENSSL_NO_ECDH */
2462                 else if (alg_k & SSL_kGOST)
2463                         {
2464                         /* GOST key exchange message creation */
2465                         EVP_PKEY_CTX *pkey_ctx;
2466                         X509 *peer_cert;
2467                         size_t msglen;
2468                         unsigned int md_len;
2469                         int keytype;
2470                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2471                         EVP_MD_CTX *ukm_hash;
2472                         EVP_PKEY *pub_key;
2473
2474                         /* Get server sertificate PKEY and create ctx from it */
2475                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2476                         if (!peer_cert)
2477                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2478                         if (!peer_cert)         {
2479                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2480                                         goto err;
2481                                 }
2482
2483                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2484                         /* If we have send a certificate, and certificate key
2485
2486                          * parameters match those of server certificate, use
2487                          * certificate key for key exchange
2488                          */
2489
2490                          /* Otherwise, generate ephemeral key pair */
2491
2492                         EVP_PKEY_encrypt_init(pkey_ctx);
2493                           /* Generate session key */
2494                     RAND_bytes(premaster_secret,32);
2495                         /* If we have client certificate, use its secret as peer key */
2496                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2497                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2498                                         /* If there was an error - just ignore it. Ephemeral key
2499                                         * would be used
2500                                         */
2501                                         ERR_clear_error();
2502                                 }
2503                         }
2504                         /* Compute shared IV and store it in algorithm-specific
2505                          * context data */
2506                         ukm_hash = EVP_MD_CTX_create();
2507                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2508                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2509                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2510                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2511                         EVP_MD_CTX_destroy(ukm_hash);
2512                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2513                                 8,shared_ukm)<0) {
2514                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2515                                                 SSL_R_LIBRARY_BUG);
2516                                         goto err;
2517                                 }
2518                         /* Make GOST keytransport blob message */
2519                         /*Encapsulate it into sequence */
2520                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2521                         msglen=255;
2522                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2523                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2524                                         SSL_R_LIBRARY_BUG);
2525                                 goto err;
2526                         }
2527                         if (msglen >= 0x80)
2528                                 {
2529                                 *(p++)=0x81;
2530                                 *(p++)= msglen & 0xff;
2531                                 n=msglen+3;
2532                                 }
2533                         else
2534                                 {
2535                                 *(p++)= msglen & 0xff;
2536                                 n=msglen+2;
2537                                 }
2538                         memcpy(p, tmp, msglen);
2539                         /* Check if pubkey from client certificate was used */
2540                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2541                                 {
2542                                 /* Set flag "skip certificate verify" */
2543                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2544                                 }
2545                         EVP_PKEY_CTX_free(pkey_ctx);
2546                         s->session->master_key_length=
2547                                 s->method->ssl3_enc->generate_master_secret(s,
2548                                         s->session->master_key,premaster_secret,32);
2549                         EVP_PKEY_free(pub_key);
2550
2551                         }
2552 #ifndef OPENSSL_NO_PSK
2553                 else if (alg_k & SSL_kPSK)
2554                         {
2555                         char identity[PSK_MAX_IDENTITY_LEN];
2556                         unsigned char *t = NULL;
2557                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2558                         unsigned int pre_ms_len = 0, psk_len = 0;
2559                         int psk_err = 1;
2560
2561                         n = 0;
2562                         if (s->psk_client_callback == NULL)
2563                                 {
2564                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2565                                         SSL_R_PSK_NO_CLIENT_CB);
2566                                 goto err;
2567                                 }
2568
2569                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2570                                 identity, PSK_MAX_IDENTITY_LEN,
2571                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2572                         if (psk_len > PSK_MAX_PSK_LEN)
2573                                 {
2574                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2575                                         ERR_R_INTERNAL_ERROR);
2576                                 goto psk_err;
2577                                 }
2578                         else if (psk_len == 0)
2579                                 {
2580                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2581                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2582                                 goto psk_err;
2583                                 }
2584
2585                         /* create PSK pre_master_secret */
2586                         pre_ms_len = 2+psk_len+2+psk_len;
2587                         t = psk_or_pre_ms;
2588                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2589                         s2n(psk_len, t);
2590                         memset(t, 0, psk_len);
2591                         t+=psk_len;
2592                         s2n(psk_len, t);
2593
2594                         if (s->session->psk_identity_hint != NULL)
2595                                 OPENSSL_free(s->session->psk_identity_hint);
2596                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2597                         if (s->ctx->psk_identity_hint != NULL &&
2598                                 s->session->psk_identity_hint == NULL)
2599                                 {
2600                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2601                                         ERR_R_MALLOC_FAILURE);
2602                                 goto psk_err;
2603                                 }
2604
2605                         if (s->session->psk_identity != NULL)
2606                                 OPENSSL_free(s->session->psk_identity);
2607                         s->session->psk_identity = BUF_strdup(identity);
2608                         if (s->session->psk_identity == NULL)
2609                                 {
2610                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2611                                         ERR_R_MALLOC_FAILURE);
2612                                 goto psk_err;
2613                                 }
2614
2615                         s->session->master_key_length =
2616                                 s->method->ssl3_enc->generate_master_secret(s,
2617                                         s->session->master_key,
2618                                         psk_or_pre_ms, pre_ms_len);
2619                         n = strlen(identity);
2620                         s2n(n, p);
2621                         memcpy(p, identity, n);
2622                         n+=2;
2623                         psk_err = 0;
2624                 psk_err:
2625                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2626                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2627                         if (psk_err != 0)
2628                                 {
2629                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2630                                 goto err;
2631                                 }
2632                         }
2633 #endif
2634                 else
2635                         {
2636                         ssl3_send_alert(s, SSL3_AL_FATAL,
2637                             SSL_AD_HANDSHAKE_FAILURE);
2638                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2639                             ERR_R_INTERNAL_ERROR);
2640                         goto err;
2641                         }
2642
2643                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2644                 l2n3(n,d);
2645
2646                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2647                 /* number of bytes to write */
2648                 s->init_num=n+4;
2649                 s->init_off=0;
2650                 }
2651
2652         /* SSL3_ST_CW_KEY_EXCH_B */
2653         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2654 err:
2655 #ifndef OPENSSL_NO_ECDH
2656         BN_CTX_free(bn_ctx);
2657         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2658         if (clnt_ecdh != NULL)
2659                 EC_KEY_free(clnt_ecdh);
2660         EVP_PKEY_free(srvr_pub_pkey);
2661 #endif
2662         return(-1);
2663         }
2664
2665 int ssl3_send_client_verify(SSL *s)
2666         {
2667         unsigned char *p,*d;
2668         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2669         EVP_PKEY *pkey;
2670         EVP_PKEY_CTX *pctx=NULL;
2671 #ifndef OPENSSL_NO_RSA
2672         unsigned u=0;
2673 #endif
2674         unsigned long n;
2675         int j;
2676
2677         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2678                 {
2679                 d=(unsigned char *)s->init_buf->data;
2680                 p= &(d[4]);
2681                 pkey=s->cert->key->privatekey;
2682 /* Create context from key and test if sha1 is allowed as digest */
2683                 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2684                 EVP_PKEY_sign_init(pctx);
2685                 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2686                         {
2687                         s->method->ssl3_enc->cert_verify_mac(s,
2688                                                 NID_sha1,
2689                                                 &(data[MD5_DIGEST_LENGTH]));
2690                         }
2691                 else
2692                         {
2693                         ERR_clear_error();
2694                         }
2695 #ifndef OPENSSL_NO_RSA
2696                 if (pkey->type == EVP_PKEY_RSA)
2697                         {
2698                         s->method->ssl3_enc->cert_verify_mac(s,
2699                                 NID_md5,
2700                                 &(data[0]));
2701                         if (RSA_sign(NID_md5_sha1, data,
2702                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2703                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2704                                 {
2705                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2706                                 goto err;
2707                                 }
2708                         s2n(u,p);
2709                         n=u+2;
2710                         }
2711                 else
2712 #endif
2713 #ifndef OPENSSL_NO_DSA
2714                         if (pkey->type == EVP_PKEY_DSA)
2715                         {
2716                         if (!DSA_sign(pkey->save_type,
2717                                 &(data[MD5_DIGEST_LENGTH]),
2718                                 SHA_DIGEST_LENGTH,&(p[2]),
2719                                 (unsigned int *)&j,pkey->pkey.dsa))
2720                                 {
2721                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2722                                 goto err;
2723                                 }
2724                         s2n(j,p);
2725                         n=j+2;
2726                         }
2727                 else
2728 #endif
2729 #ifndef OPENSSL_NO_ECDSA
2730                         if (pkey->type == EVP_PKEY_EC)
2731                         {
2732                         if (!ECDSA_sign(pkey->save_type,
2733                                 &(data[MD5_DIGEST_LENGTH]),
2734                                 SHA_DIGEST_LENGTH,&(p[2]),
2735                                 (unsigned int *)&j,pkey->pkey.ec))
2736                                 {
2737                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2738                                     ERR_R_ECDSA_LIB);
2739                                 goto err;
2740                                 }
2741                         s2n(j,p);
2742                         n=j+2;
2743                         }
2744                 else
2745 #endif
2746                 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
2747                 {
2748                 unsigned char signbuf[64];
2749                 int i;
2750                 size_t sigsize=64;
2751                 s->method->ssl3_enc->cert_verify_mac(s,
2752                         NID_id_GostR3411_94,
2753                         data);
2754                 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
2755                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2756                         ERR_R_INTERNAL_ERROR);
2757                         goto err;
2758                 }
2759                 for (i=63,j=0; i>=0; j++, i--) {
2760                         p[2+j]=signbuf[i];
2761                 }
2762                 s2n(j,p);
2763                 n=j+2;
2764                 }
2765                 else
2766                 {
2767                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2768                         goto err;
2769                 }
2770                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2771                 l2n3(n,d);
2772
2773                 s->state=SSL3_ST_CW_CERT_VRFY_B;
2774                 s->init_num=(int)n+4;
2775                 s->init_off=0;
2776                 }
2777         EVP_PKEY_CTX_free(pctx);
2778         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2779 err:
2780         EVP_PKEY_CTX_free(pctx);
2781         return(-1);
2782         }
2783
2784 int ssl3_send_client_certificate(SSL *s)
2785         {
2786         X509 *x509=NULL;
2787         EVP_PKEY *pkey=NULL;
2788         int i;
2789         unsigned long l;
2790
2791         if (s->state == SSL3_ST_CW_CERT_A)
2792                 {
2793                 if ((s->cert == NULL) ||
2794                         (s->cert->key->x509 == NULL) ||
2795                         (s->cert->key->privatekey == NULL))
2796                         s->state=SSL3_ST_CW_CERT_B;
2797                 else
2798                         s->state=SSL3_ST_CW_CERT_C;
2799                 }
2800
2801         /* We need to get a client cert */
2802         if (s->state == SSL3_ST_CW_CERT_B)
2803                 {
2804                 /* If we get an error, we need to
2805                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2806                  * We then get retied later */
2807                 i=0;
2808                 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2809                 if (i < 0)
2810                         {
2811                         s->rwstate=SSL_X509_LOOKUP;
2812                         return(-1);
2813                         }
2814                 s->rwstate=SSL_NOTHING;
2815                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2816                         {
2817                         s->state=SSL3_ST_CW_CERT_B;
2818                         if (    !SSL_use_certificate(s,x509) ||
2819                                 !SSL_use_PrivateKey(s,pkey))
2820                                 i=0;
2821                         }
2822                 else if (i == 1)
2823                         {
2824                         i=0;
2825                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2826                         }
2827
2828                 if (x509 != NULL) X509_free(x509);
2829                 if (pkey != NULL) EVP_PKEY_free(pkey);
2830                 if (i == 0)
2831                         {
2832                         if (s->version == SSL3_VERSION)
2833                                 {
2834                                 s->s3->tmp.cert_req=0;
2835                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2836                                 return(1);
2837                                 }
2838                         else
2839                                 {
2840                                 s->s3->tmp.cert_req=2;
2841                                 }
2842                         }
2843
2844                 /* Ok, we have a cert */
2845                 s->state=SSL3_ST_CW_CERT_C;
2846                 }
2847
2848         if (s->state == SSL3_ST_CW_CERT_C)
2849                 {
2850                 s->state=SSL3_ST_CW_CERT_D;
2851                 l=ssl3_output_cert_chain(s,
2852                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2853                 s->init_num=(int)l;
2854                 s->init_off=0;
2855                 }
2856         /* SSL3_ST_CW_CERT_D */
2857         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2858         }
2859
2860 #define has_bits(i,m)   (((i)&(m)) == (m))
2861
2862 int ssl3_check_cert_and_algorithm(SSL *s)
2863         {
2864         int i,idx;
2865         long alg_k,alg_a;
2866         EVP_PKEY *pkey=NULL;
2867         SESS_CERT *sc;
2868 #ifndef OPENSSL_NO_RSA
2869         RSA *rsa;
2870 #endif
2871 #ifndef OPENSSL_NO_DH
2872         DH *dh;
2873 #endif
2874
2875         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2876         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
2877
2878         /* we don't have a certificate */
2879         if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
2880                 return(1);
2881
2882         sc=s->session->sess_cert;
2883         if (sc == NULL)
2884                 {
2885                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2886                 goto err;
2887                 }
2888
2889 #ifndef OPENSSL_NO_RSA
2890         rsa=s->session->sess_cert->peer_rsa_tmp;
2891 #endif
2892 #ifndef OPENSSL_NO_DH
2893         dh=s->session->sess_cert->peer_dh_tmp;
2894 #endif
2895
2896         /* This is the passed certificate */
2897
2898         idx=sc->peer_cert_type;
2899 #ifndef OPENSSL_NO_ECDH
2900         if (idx == SSL_PKEY_ECC)
2901                 {
2902                 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2903                     s->s3->tmp.new_cipher) == 0)
2904                         { /* check failed */
2905                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2906                         goto f_err;
2907                         }
2908                 else
2909                         {
2910                         return 1;
2911                         }
2912                 }
2913 #endif
2914         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2915         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2916         EVP_PKEY_free(pkey);
2917
2918
2919         /* Check that we have a certificate if we require one */
2920         if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2921                 {
2922                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2923                 goto f_err;
2924                 }
2925 #ifndef OPENSSL_NO_DSA
2926         else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2927                 {
2928                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2929                 goto f_err;
2930                 }
2931 #endif
2932 #ifndef OPENSSL_NO_RSA
2933         if ((alg_k & SSL_kRSA) &&
2934                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2935                 {
2936                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2937                 goto f_err;
2938                 }
2939 #endif
2940 #ifndef OPENSSL_NO_DH
2941         if ((alg_k & SSL_kEDH) &&
2942                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2943                 {
2944                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2945                 goto f_err;
2946                 }
2947         else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2948                 {
2949                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2950                 goto f_err;
2951                 }
2952 #ifndef OPENSSL_NO_DSA
2953         else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2954                 {
2955                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2956                 goto f_err;
2957                 }
2958 #endif
2959 #endif
2960
2961         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2962                 {
2963 #ifndef OPENSSL_NO_RSA
2964                 if (alg_k & SSL_kRSA)
2965                         {
2966                         if (rsa == NULL
2967                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2968                                 {
2969                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2970                                 goto f_err;
2971                                 }
2972                         }
2973                 else
2974 #endif
2975 #ifndef OPENSSL_NO_DH
2976                         if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2977                             {
2978                             if (dh == NULL
2979                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2980                                 {
2981                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2982                                 goto f_err;
2983                                 }
2984                         }
2985                 else
2986 #endif
2987                         {
2988                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2989                         goto f_err;
2990                         }
2991                 }
2992         return(1);
2993 f_err:
2994         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2995 err:
2996         return(0);
2997         }
2998
2999 /* Check to see if handshake is full or resumed. Usually this is just a
3000  * case of checking to see if a cache hit has occurred. In the case of
3001  * session tickets we have to check the next message to be sure.
3002  */
3003
3004 #ifndef OPENSSL_NO_TLSEXT
3005 int ssl3_check_finished(SSL *s)
3006         {
3007         int ok;
3008         long n;
3009         /* If we have no ticket it cannot be a resumed session. */
3010         if (!s->session->tlsext_tick)
3011                 return 1;
3012         /* this function is called when we really expect a Certificate
3013          * message, so permit appropriate message length */
3014         n=s->method->ssl_get_message(s,
3015                 SSL3_ST_CR_CERT_A,
3016                 SSL3_ST_CR_CERT_B,
3017                 -1,
3018                 s->max_cert_list,
3019                 &ok);
3020         if (!ok) return((int)n);
3021         s->s3->tmp.reuse_message = 1;
3022         if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3023                 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3024                 return 2;
3025
3026         return 1;
3027         }
3028 #endif
3029
3030 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3031         {
3032         int i = 0;
3033 #ifndef OPENSSL_NO_ENGINE
3034         if (s->ctx->client_cert_engine)
3035                 {
3036                 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3037                                                 SSL_get_client_CA_list(s),
3038                                                 px509, ppkey, NULL, NULL, NULL);
3039                 if (i != 0)
3040                         return i;
3041                 }
3042 #endif
3043         if (s->ctx->client_cert_cb)
3044                 i = s->ctx->client_cert_cb(s,px509,ppkey);
3045         return i;
3046         }