crypto/openssl/ssl/s3_clnt.c

   1 /* ssl/s3_clnt.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  *
 114  * Portions of the attached software ("Contribution") are developed by
 115  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
 116  *
 117  * The Contribution is licensed pursuant to the OpenSSL open source
 118  * license provided above.
 119  *
 120  * ECC cipher suite support in OpenSSL originally written by
 121  * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
 122  *
 123  */
 124 /* ====================================================================
 125  * Copyright 2005 Nokia. All rights reserved.
 126  *
 127  * The portions of the attached software ("Contribution") is developed by
 128  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 129  * license.
 130  *
 131  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 132  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 133  * support (see RFC 4279) to OpenSSL.
 134  *
 135  * No patent licenses or other rights except those expressly stated in
 136  * the OpenSSL open source license shall be deemed granted or received
 137  * expressly, by implication, estoppel, or otherwise.
 138  *
 139  * No assurances are provided by Nokia that the Contribution does not
 140  * infringe the patent or other intellectual property rights of any third
 141  * party or that the license provides you with all the necessary rights
 142  * to make use of the Contribution.
 143  *
 144  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 145  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 146  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 147  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 148  * OTHERWISE.
 149  */
 150
 151 #include <stdio.h>
 152 #include "ssl_locl.h"
 153 #include "kssl_lcl.h"
 154 #include <openssl/buffer.h>
 155 #include <openssl/rand.h>
 156 #include <openssl/objects.h>
 157 #include <openssl/evp.h>
 158 #include <openssl/md5.h>
 159 #ifdef OPENSSL_FIPS
 160 #include <openssl/fips.h>
 161 #endif
 162 #ifndef OPENSSL_NO_DH
 163 #include <openssl/dh.h>
 164 #endif
 165 #include <openssl/bn.h>
 166 #ifndef OPENSSL_NO_ENGINE
 167 #include <openssl/engine.h>
 168 #endif
 169
 170 static const SSL_METHOD *ssl3_get_client_method(int ver);
 171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
 172
 173 static const SSL_METHOD *ssl3_get_client_method(int ver)
 174         {
 175         if (ver == SSL3_VERSION)
 176                 return(SSLv3_client_method());
 177         else
 178                 return(NULL);
 179         }
 180
 181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
 182                         ssl_undefined_function,
 183                         ssl3_connect,
 184                         ssl3_get_client_method)
 185
 186 int ssl3_connect(SSL *s)
 187         {
 188         BUF_MEM *buf=NULL;
 189         unsigned long Time=(unsigned long)time(NULL);
 190         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 191         int ret= -1;
 192         int new_state,state,skip=0;
 193
 194         RAND_add(&Time,sizeof(Time),0);
 195         ERR_clear_error();
 196         clear_sys_error();
 197
 198         if (s->info_callback != NULL)
 199                 cb=s->info_callback;
 200         else if (s->ctx->info_callback != NULL)
 201                 cb=s->ctx->info_callback;
 202
 203         s->in_handshake++;
 204         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 205
 206 #ifndef OPENSSL_NO_HEARTBEATS
 207         /* If we're awaiting a HeartbeatResponse, pretend we
 208          * already got and don't await it anymore, because
 209          * Heartbeats don't make sense during handshakes anyway.
 210          */
 211         if (s->tlsext_hb_pending)
 212                 {
 213                 s->tlsext_hb_pending = 0;
 214                 s->tlsext_hb_seq++;
 215                 }
 216 #endif
 217
 218         for (;;)
 219                 {
 220                 state=s->state;
 221
 222                 switch(s->state)
 223                         {
 224                 case SSL_ST_RENEGOTIATE:
 225                         s->renegotiate=1;
 226                         s->state=SSL_ST_CONNECT;
 227                         s->ctx->stats.sess_connect_renegotiate++;
 228                         /* break */
 229                 case SSL_ST_BEFORE:
 230                 case SSL_ST_CONNECT:
 231                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 232                 case SSL_ST_OK|SSL_ST_CONNECT:
 233
 234                         s->server=0;
 235                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 236
 237                         if ((s->version & 0xff00 ) != 0x0300)
 238                                 {
 239                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
 240                                 ret = -1;
 241                                 goto end;
 242                                 }
 243
 244                         /* s->version=SSL3_VERSION; */
 245                         s->type=SSL_ST_CONNECT;
 246
 247                         if (s->init_buf == NULL)
 248                                 {
 249                                 if ((buf=BUF_MEM_new()) == NULL)
 250                                         {
 251                                         ret= -1;
 252                                         goto end;
 253                                         }
 254                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 255                                         {
 256                                         ret= -1;
 257                                         goto end;
 258                                         }
 259                                 s->init_buf=buf;
 260                                 buf=NULL;
 261                                 }
 262
 263                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 264
 265                         /* setup buffing BIO */
 266                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
 267
 268                         /* don't push the buffering BIO quite yet */
 269
 270                         ssl3_init_finished_mac(s);
 271
 272                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
 273                         s->ctx->stats.sess_connect++;
 274                         s->init_num=0;
 275                         break;
 276
 277                 case SSL3_ST_CW_CLNT_HELLO_A:
 278                 case SSL3_ST_CW_CLNT_HELLO_B:
 279
 280                         s->shutdown=0;
 281                         ret=ssl3_client_hello(s);
 282                         if (ret <= 0) goto end;
 283                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
 284                         s->init_num=0;
 285
 286                         /* turn on buffering for the next lot of output */
 287                         if (s->bbio != s->wbio)
 288                                 s->wbio=BIO_push(s->bbio,s->wbio);
 289
 290                         break;
 291
 292                 case SSL3_ST_CR_SRVR_HELLO_A:
 293                 case SSL3_ST_CR_SRVR_HELLO_B:
 294                         ret=ssl3_get_server_hello(s);
 295                         if (ret <= 0) goto end;
 296
 297                         if (s->hit)
 298                                 {
 299                                 s->state=SSL3_ST_CR_FINISHED_A;
 300 #ifndef OPENSSL_NO_TLSEXT
 301                                 if (s->tlsext_ticket_expected)
 302                                         {
 303                                         /* receive renewed session ticket */
 304                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
 305                                         }
 306 #endif
 307                                 }
 308                         else
 309                                 s->state=SSL3_ST_CR_CERT_A;
 310                         s->init_num=0;
 311                         break;
 312
 313                 case SSL3_ST_CR_CERT_A:
 314                 case SSL3_ST_CR_CERT_B:
 315 #ifndef OPENSSL_NO_TLSEXT
 316                         ret=ssl3_check_finished(s);
 317                         if (ret <= 0) goto end;
 318                         if (ret == 2)
 319                                 {
 320                                 s->hit = 1;
 321                                 if (s->tlsext_ticket_expected)
 322                                         s->state=SSL3_ST_CR_SESSION_TICKET_A;
 323                                 else
 324                                         s->state=SSL3_ST_CR_FINISHED_A;
 325                                 s->init_num=0;
 326                                 break;
 327                                 }
 328 #endif
 329                         /* Check if it is anon DH/ECDH */
 330                         /* or PSK */
 331                         if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
 332                             !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
 333                                 {
 334                                 ret=ssl3_get_server_certificate(s);
 335                                 if (ret <= 0) goto end;
 336 #ifndef OPENSSL_NO_TLSEXT
 337                                 if (s->tlsext_status_expected)
 338                                         s->state=SSL3_ST_CR_CERT_STATUS_A;
 339                                 else
 340                                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 341                                 }
 342                         else
 343                                 {
 344                                 skip = 1;
 345                                 s->state=SSL3_ST_CR_KEY_EXCH_A;
 346                                 }
 347 #else
 348                                 }
 349                         else
 350                                 skip=1;
 351
 352                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 353 #endif
 354                         s->init_num=0;
 355                         break;
 356
 357                 case SSL3_ST_CR_KEY_EXCH_A:
 358                 case SSL3_ST_CR_KEY_EXCH_B:
 359                         ret=ssl3_get_key_exchange(s);
 360                         if (ret <= 0) goto end;
 361                         s->state=SSL3_ST_CR_CERT_REQ_A;
 362                         s->init_num=0;
 363
 364                         /* at this point we check that we have the
 365                          * required stuff from the server */
 366                         if (!ssl3_check_cert_and_algorithm(s))
 367                                 {
 368                                 ret= -1;
 369                                 goto end;
 370                                 }
 371                         break;
 372
 373                 case SSL3_ST_CR_CERT_REQ_A:
 374                 case SSL3_ST_CR_CERT_REQ_B:
 375                         ret=ssl3_get_certificate_request(s);
 376                         if (ret <= 0) goto end;
 377                         s->state=SSL3_ST_CR_SRVR_DONE_A;
 378                         s->init_num=0;
 379                         break;
 380
 381                 case SSL3_ST_CR_SRVR_DONE_A:
 382                 case SSL3_ST_CR_SRVR_DONE_B:
 383                         ret=ssl3_get_server_done(s);
 384                         if (ret <= 0) goto end;
 385 #ifndef OPENSSL_NO_SRP
 386                         if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
 387                                 {
 388                                 if ((ret = SRP_Calc_A_param(s))<=0)
 389                                         {
 390                                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
 391                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
 392                                         goto end;
 393                                         }
 394                                 }
 395 #endif
 396                         if (s->s3->tmp.cert_req)
 397                                 s->state=SSL3_ST_CW_CERT_A;
 398                         else
 399                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
 400                         s->init_num=0;
 401
 402                         break;
 403
 404                 case SSL3_ST_CW_CERT_A:
 405                 case SSL3_ST_CW_CERT_B:
 406                 case SSL3_ST_CW_CERT_C:
 407                 case SSL3_ST_CW_CERT_D:
 408                         ret=ssl3_send_client_certificate(s);
 409                         if (ret <= 0) goto end;
 410                         s->state=SSL3_ST_CW_KEY_EXCH_A;
 411                         s->init_num=0;
 412                         break;
 413
 414                 case SSL3_ST_CW_KEY_EXCH_A:
 415                 case SSL3_ST_CW_KEY_EXCH_B:
 416                         ret=ssl3_send_client_key_exchange(s);
 417                         if (ret <= 0) goto end;
 418                         /* EAY EAY EAY need to check for DH fix cert
 419                          * sent back */
 420                         /* For TLS, cert_req is set to 2, so a cert chain
 421                          * of nothing is sent, but no verify packet is sent */
 422                         /* XXX: For now, we do not support client
 423                          * authentication in ECDH cipher suites with
 424                          * ECDH (rather than ECDSA) certificates.
 425                          * We need to skip the certificate verify
 426                          * message when client's ECDH public key is sent
 427                          * inside the client certificate.
 428                          */
 429                         if (s->s3->tmp.cert_req == 1)
 430                                 {
 431                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
 432                                 }
 433                         else
 434                                 {
 435                                 s->state=SSL3_ST_CW_CHANGE_A;
 436                                 s->s3->change_cipher_spec=0;
 437                                 }
 438                         if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
 439                                 {
 440                                 s->state=SSL3_ST_CW_CHANGE_A;
 441                                 s->s3->change_cipher_spec=0;
 442                                 }
 443
 444                         s->init_num=0;
 445                         break;
 446
 447                 case SSL3_ST_CW_CERT_VRFY_A:
 448                 case SSL3_ST_CW_CERT_VRFY_B:
 449                         ret=ssl3_send_client_verify(s);
 450                         if (ret <= 0) goto end;
 451                         s->state=SSL3_ST_CW_CHANGE_A;
 452                         s->init_num=0;
 453                         s->s3->change_cipher_spec=0;
 454                         break;
 455
 456                 case SSL3_ST_CW_CHANGE_A:
 457                 case SSL3_ST_CW_CHANGE_B:
 458                         ret=ssl3_send_change_cipher_spec(s,
 459                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
 460                         if (ret <= 0) goto end;
 461
 462 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
 463                         s->state=SSL3_ST_CW_FINISHED_A;
 464 #else
 465                         if (s->s3->next_proto_neg_seen)
 466                                 s->state=SSL3_ST_CW_NEXT_PROTO_A;
 467                         else
 468                                 s->state=SSL3_ST_CW_FINISHED_A;
 469 #endif
 470                         s->init_num=0;
 471
 472                         s->session->cipher=s->s3->tmp.new_cipher;
 473 #ifdef OPENSSL_NO_COMP
 474                         s->session->compress_meth=0;
 475 #else
 476                         if (s->s3->tmp.new_compression == NULL)
 477                                 s->session->compress_meth=0;
 478                         else
 479                                 s->session->compress_meth=
 480                                         s->s3->tmp.new_compression->id;
 481 #endif
 482                         if (!s->method->ssl3_enc->setup_key_block(s))
 483                                 {
 484                                 ret= -1;
 485                                 goto end;
 486                                 }
 487
 488                         if (!s->method->ssl3_enc->change_cipher_state(s,
 489                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
 490                                 {
 491                                 ret= -1;
 492                                 goto end;
 493                                 }
 494
 495                         break;
 496
 497 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 498                 case SSL3_ST_CW_NEXT_PROTO_A:
 499                 case SSL3_ST_CW_NEXT_PROTO_B:
 500                         ret=ssl3_send_next_proto(s);
 501                         if (ret <= 0) goto end;
 502                         s->state=SSL3_ST_CW_FINISHED_A;
 503                         break;
 504 #endif
 505
 506                 case SSL3_ST_CW_FINISHED_A:
 507                 case SSL3_ST_CW_FINISHED_B:
 508                         ret=ssl3_send_finished(s,
 509                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
 510                                 s->method->ssl3_enc->client_finished_label,
 511                                 s->method->ssl3_enc->client_finished_label_len);
 512                         if (ret <= 0) goto end;
 513                         s->state=SSL3_ST_CW_FLUSH;
 514
 515                         /* clear flags */
 516                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 517                         if (s->hit)
 518                                 {
 519                                 s->s3->tmp.next_state=SSL_ST_OK;
 520                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
 521                                         {
 522                                         s->state=SSL_ST_OK;
 523                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
 524                                         s->s3->delay_buf_pop_ret=0;
 525                                         }
 526                                 }
 527                         else
 528                                 {
 529 #ifndef OPENSSL_NO_TLSEXT
 530                                 /* Allow NewSessionTicket if ticket expected */
 531                                 if (s->tlsext_ticket_expected)
 532                                         s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
 533                                 else
 534 #endif
 535
 536                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
 537                                 }
 538                         s->init_num=0;
 539                         break;
 540
 541 #ifndef OPENSSL_NO_TLSEXT
 542                 case SSL3_ST_CR_SESSION_TICKET_A:
 543                 case SSL3_ST_CR_SESSION_TICKET_B:
 544                         ret=ssl3_get_new_session_ticket(s);
 545                         if (ret <= 0) goto end;
 546                         s->state=SSL3_ST_CR_FINISHED_A;
 547                         s->init_num=0;
 548                 break;
 549
 550                 case SSL3_ST_CR_CERT_STATUS_A:
 551                 case SSL3_ST_CR_CERT_STATUS_B:
 552                         ret=ssl3_get_cert_status(s);
 553                         if (ret <= 0) goto end;
 554                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 555                         s->init_num=0;
 556                 break;
 557 #endif
 558
 559                 case SSL3_ST_CR_FINISHED_A:
 560                 case SSL3_ST_CR_FINISHED_B:
 561
 562                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 563                                 SSL3_ST_CR_FINISHED_B);
 564                         if (ret <= 0) goto end;
 565
 566                         if (s->hit)
 567                                 s->state=SSL3_ST_CW_CHANGE_A;
 568                         else
 569                                 s->state=SSL_ST_OK;
 570                         s->init_num=0;
 571                         break;
 572
 573                 case SSL3_ST_CW_FLUSH:
 574                         s->rwstate=SSL_WRITING;
 575                         if (BIO_flush(s->wbio) <= 0)
 576                                 {
 577                                 ret= -1;
 578                                 goto end;
 579                                 }
 580                         s->rwstate=SSL_NOTHING;
 581                         s->state=s->s3->tmp.next_state;
 582                         break;
 583
 584                 case SSL_ST_OK:
 585                         /* clean a few things up */
 586                         ssl3_cleanup_key_block(s);
 587
 588                         if (s->init_buf != NULL)
 589                                 {
 590                                 BUF_MEM_free(s->init_buf);
 591                                 s->init_buf=NULL;
 592                                 }
 593
 594                         /* If we are not 'joining' the last two packets,
 595                          * remove the buffering now */
 596                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 597                                 ssl_free_wbio_buffer(s);
 598                         /* else do it later in ssl3_write */
 599
 600                         s->init_num=0;
 601                         s->renegotiate=0;
 602                         s->new_session=0;
 603
 604                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 605                         if (s->hit) s->ctx->stats.sess_hit++;
 606
 607                         ret=1;
 608                         /* s->server=0; */
 609                         s->handshake_func=ssl3_connect;
 610                         s->ctx->stats.sess_connect_good++;
 611
 612                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 613
 614                         goto end;
 615                         /* break; */
 616
 617                 default:
 618                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 619                         ret= -1;
 620                         goto end;
 621                         /* break; */
 622                         }
 623
 624                 /* did we do anything */
 625                 if (!s->s3->tmp.reuse_message && !skip)
 626                         {
 627                         if (s->debug)
 628                                 {
 629                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 630                                         goto end;
 631                                 }
 632
 633                         if ((cb != NULL) && (s->state != state))
 634                                 {
 635                                 new_state=s->state;
 636                                 s->state=state;
 637                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 638                                 s->state=new_state;
 639                                 }
 640                         }
 641                 skip=0;
 642                 }
 643 end:
 644         s->in_handshake--;
 645         if (buf != NULL)
 646                 BUF_MEM_free(buf);
 647         if (cb != NULL)
 648                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 649         return(ret);
 650         }
 651
 652
 653 int ssl3_client_hello(SSL *s)
 654         {
 655         unsigned char *buf;
 656         unsigned char *p,*d;
 657         int i;
 658         unsigned long Time,l;
 659 #ifndef OPENSSL_NO_COMP
 660         int j;
 661         SSL_COMP *comp;
 662 #endif
 663
 664         buf=(unsigned char *)s->init_buf->data;
 665         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 666                 {
 667                 SSL_SESSION *sess = s->session;
 668                 if ((sess == NULL) ||
 669                         (sess->ssl_version != s->version) ||
 670 #ifdef OPENSSL_NO_TLSEXT
 671                         !sess->session_id_length ||
 672 #else
 673                         (!sess->session_id_length && !sess->tlsext_tick) ||
 674 #endif
 675                         (sess->not_resumable))
 676                         {
 677                         if (!ssl_get_new_session(s,0))
 678                                 goto err;
 679                         }
 680                 /* else use the pre-loaded session */
 681
 682                 p=s->s3->client_random;
 683                 Time=(unsigned long)time(NULL);                 /* Time */
 684                 l2n(Time,p);
 685                 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
 686                         goto err;
 687
 688                 /* Do the message type and length last */
 689                 d=p= &(buf[4]);
 690
 691                 /* version indicates the negotiated version: for example from
 692                  * an SSLv2/v3 compatible client hello). The client_version
 693                  * field is the maximum version we permit and it is also
 694                  * used in RSA encrypted premaster secrets. Some servers can
 695                  * choke if we initially report a higher version then
 696                  * renegotiate to a lower one in the premaster secret. This
 697                  * didn't happen with TLS 1.0 as most servers supported it
 698                  * but it can with TLS 1.1 or later if the server only supports
 699                  * 1.0.
 700                  *
 701                  * Possible scenario with previous logic:
 702                  *      1. Client hello indicates TLS 1.2
 703                  *      2. Server hello says TLS 1.0
 704                  *      3. RSA encrypted premaster secret uses 1.2.
 705                  *      4. Handhaked proceeds using TLS 1.0.
 706                  *      5. Server sends hello request to renegotiate.
 707                  *      6. Client hello indicates TLS v1.0 as we now
 708                  *         know that is maximum server supports.
 709                  *      7. Server chokes on RSA encrypted premaster secret
 710                  *         containing version 1.0.
 711                  *
 712                  * For interoperability it should be OK to always use the
 713                  * maximum version we support in client hello and then rely
 714                  * on the checking of version to ensure the servers isn't
 715                  * being inconsistent: for example initially negotiating with
 716                  * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
 717                  * client_version in client hello and not resetting it to
 718                  * the negotiated version.
 719                  */
 720 #if 0
 721                 *(p++)=s->version>>8;
 722                 *(p++)=s->version&0xff;
 723                 s->client_version=s->version;
 724 #else
 725                 *(p++)=s->client_version>>8;
 726                 *(p++)=s->client_version&0xff;
 727 #endif
 728
 729                 /* Random stuff */
 730                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 731                 p+=SSL3_RANDOM_SIZE;
 732
 733                 /* Session ID */
 734                 if (s->new_session)
 735                         i=0;
 736                 else
 737                         i=s->session->session_id_length;
 738                 *(p++)=i;
 739                 if (i != 0)
 740                         {
 741                         if (i > (int)sizeof(s->session->session_id))
 742                                 {
 743                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
 744                                 goto err;
 745                                 }
 746                         memcpy(p,s->session->session_id,i);
 747                         p+=i;
 748                         }
 749
 750                 /* Ciphers supported */
 751                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
 752                 if (i == 0)
 753                         {
 754                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 755                         goto err;
 756                         }
 757 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
 758                         /* Some servers hang if client hello > 256 bytes
 759                          * as hack workaround chop number of supported ciphers
 760                          * to keep it well below this if we use TLS v1.2
 761                          */
 762                         if (TLS1_get_version(s) >= TLS1_2_VERSION
 763                                 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
 764                                 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
 765 #endif
 766                 s2n(i,p);
 767                 p+=i;
 768
 769                 /* COMPRESSION */
 770 #ifdef OPENSSL_NO_COMP
 771                 *(p++)=1;
 772 #else
 773
 774                 if ((s->options & SSL_OP_NO_COMPRESSION)
 775                                         || !s->ctx->comp_methods)
 776                         j=0;
 777                 else
 778                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 779                 *(p++)=1+j;
 780                 for (i=0; i<j; i++)
 781                         {
 782                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 783                         *(p++)=comp->id;
 784                         }
 785 #endif
 786                 *(p++)=0; /* Add the NULL method */
 787
 788 #ifndef OPENSSL_NO_TLSEXT
 789                 /* TLS extensions*/
 790                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
 791                         {
 792                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
 793                         goto err;
 794                         }
 795                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
 796                         {
 797                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
 798                         goto err;
 799                         }
 800 #endif
 801
 802                 l=(p-d);
 803                 d=buf;
 804                 *(d++)=SSL3_MT_CLIENT_HELLO;
 805                 l2n3(l,d);
 806
 807                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 808                 /* number of bytes to write */
 809                 s->init_num=p-buf;
 810                 s->init_off=0;
 811                 }
 812
 813         /* SSL3_ST_CW_CLNT_HELLO_B */
 814         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 815 err:
 816         return(-1);
 817         }
 818
 819 int ssl3_get_server_hello(SSL *s)
 820         {
 821         STACK_OF(SSL_CIPHER) *sk;
 822         const SSL_CIPHER *c;
 823         unsigned char *p,*d;
 824         int i,al,ok;
 825         unsigned int j;
 826         long n;
 827 #ifndef OPENSSL_NO_COMP
 828         SSL_COMP *comp;
 829 #endif
 830
 831         n=s->method->ssl_get_message(s,
 832                 SSL3_ST_CR_SRVR_HELLO_A,
 833                 SSL3_ST_CR_SRVR_HELLO_B,
 834                 -1,
 835                 20000, /* ?? */
 836                 &ok);
 837
 838         if (!ok) return((int)n);
 839
 840         if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 841                 {
 842                 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
 843                         {
 844                         if ( s->d1->send_cookie == 0)
 845                                 {
 846                                 s->s3->tmp.reuse_message = 1;
 847                                 return 1;
 848                                 }
 849                         else /* already sent a cookie */
 850                                 {
 851                                 al=SSL_AD_UNEXPECTED_MESSAGE;
 852                                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
 853                                 goto f_err;
 854                                 }
 855                         }
 856                 }
 857
 858         if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
 859                 {
 860                 al=SSL_AD_UNEXPECTED_MESSAGE;
 861                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
 862                 goto f_err;
 863                 }
 864
 865         d=p=(unsigned char *)s->init_msg;
 866
 867         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 868                 {
 869                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 870                 s->version=(s->version&0xff00)|p[1];
 871                 al=SSL_AD_PROTOCOL_VERSION;
 872                 goto f_err;
 873                 }
 874         p+=2;
 875
 876         /* load the server hello data */
 877         /* load the server random */
 878         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 879         p+=SSL3_RANDOM_SIZE;
 880
 881         /* get the session-id */
 882         j= *(p++);
 883
 884         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
 885                 {
 886                 al=SSL_AD_ILLEGAL_PARAMETER;
 887                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
 888                 goto f_err;
 889                 }
 890
 891 #ifndef OPENSSL_NO_TLSEXT
 892         /* check if we want to resume the session based on external pre-shared secret */
 893         if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
 894                 {
 895                 SSL_CIPHER *pref_cipher=NULL;
 896                 s->session->master_key_length=sizeof(s->session->master_key);
 897                 if (s->tls_session_secret_cb(s, s->session->master_key,
 898                                              &s->session->master_key_length,
 899                                              NULL, &pref_cipher,
 900                                              s->tls_session_secret_cb_arg))
 901                         {
 902                         s->session->cipher = pref_cipher ?
 903                                 pref_cipher : ssl_get_cipher_by_char(s, p+j);
 904                         }
 905                 }
 906 #endif /* OPENSSL_NO_TLSEXT */
 907
 908         if (j != 0 && j == s->session->session_id_length
 909             && memcmp(p,s->session->session_id,j) == 0)
 910             {
 911             if(s->sid_ctx_length != s->session->sid_ctx_length
 912                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 913                 {
 914                 /* actually a client application bug */
 915                 al=SSL_AD_ILLEGAL_PARAMETER;
 916                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 917                 goto f_err;
 918                 }
 919             s->hit=1;
 920             }
 921         else    /* a miss or crap from the other end */
 922                 {
 923                 /* If we were trying for session-id reuse, make a new
 924                  * SSL_SESSION so we don't stuff up other people */
 925                 s->hit=0;
 926                 if (s->session->session_id_length > 0)
 927                         {
 928                         if (!ssl_get_new_session(s,0))
 929                                 {
 930                                 al=SSL_AD_INTERNAL_ERROR;
 931                                 goto f_err;
 932                                 }
 933                         }
 934                 s->session->session_id_length=j;
 935                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 936                 }
 937         p+=j;
 938         c=ssl_get_cipher_by_char(s,p);
 939         if (c == NULL)
 940                 {
 941                 /* unknown cipher */
 942                 al=SSL_AD_ILLEGAL_PARAMETER;
 943                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 944                 goto f_err;
 945                 }
 946         /* TLS v1.2 only ciphersuites require v1.2 or later */
 947         if ((c->algorithm_ssl & SSL_TLSV1_2) &&
 948                 (TLS1_get_version(s) < TLS1_2_VERSION))
 949                 {
 950                 al=SSL_AD_ILLEGAL_PARAMETER;
 951                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 952                 goto f_err;
 953                 }
 954         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 955
 956         sk=ssl_get_ciphers_by_id(s);
 957         i=sk_SSL_CIPHER_find(sk,c);
 958         if (i < 0)
 959                 {
 960                 /* we did not say we would use this cipher */
 961                 al=SSL_AD_ILLEGAL_PARAMETER;
 962                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 963                 goto f_err;
 964                 }
 965
 966         /* Depending on the session caching (internal/external), the cipher
 967            and/or cipher_id values may not be set. Make sure that
 968            cipher_id is set and use it for comparison. */
 969         if (s->session->cipher)
 970                 s->session->cipher_id = s->session->cipher->id;
 971         if (s->hit && (s->session->cipher_id != c->id))
 972                 {
 973 /* Workaround is now obsolete */
 974 #if 0
 975                 if (!(s->options &
 976                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 977 #endif
 978                         {
 979                         al=SSL_AD_ILLEGAL_PARAMETER;
 980                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 981                         goto f_err;
 982                         }
 983                 }
 984         s->s3->tmp.new_cipher=c;
 985         /* Don't digest cached records if TLS v1.2: we may need them for
 986          * client authentication.
 987          */
 988         if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
 989                 {
 990                 al = SSL_AD_INTERNAL_ERROR;
 991                 goto f_err;
 992                 }
 993         /* lets get the compression algorithm */
 994         /* COMPRESSION */
 995 #ifdef OPENSSL_NO_COMP
 996         if (*(p++) != 0)
 997                 {
 998                 al=SSL_AD_ILLEGAL_PARAMETER;
 999                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1000                 goto f_err;
1001                 }
1002         /* If compression is disabled we'd better not try to resume a session
1003          * using compression.
1004          */
1005         if (s->session->compress_meth != 0)
1006                 {
1007                 al=SSL_AD_INTERNAL_ERROR;
1008                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1009                 goto f_err;
1010                 }
1011 #else
1012         j= *(p++);
1013         if (s->hit && j != s->session->compress_meth)
1014                 {
1015                 al=SSL_AD_ILLEGAL_PARAMETER;
1016                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1017                 goto f_err;
1018                 }
1019         if (j == 0)
1020                 comp=NULL;
1021         else if (s->options & SSL_OP_NO_COMPRESSION)
1022                 {
1023                 al=SSL_AD_ILLEGAL_PARAMETER;
1024                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1025                 goto f_err;
1026                 }
1027         else
1028                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1029
1030         if ((j != 0) && (comp == NULL))
1031                 {
1032                 al=SSL_AD_ILLEGAL_PARAMETER;
1033                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1034                 goto f_err;
1035                 }
1036         else
1037                 {
1038                 s->s3->tmp.new_compression=comp;
1039                 }
1040 #endif
1041
1042 #ifndef OPENSSL_NO_TLSEXT
1043         /* TLS extensions*/
1044         if (s->version >= SSL3_VERSION)
1045                 {
1046                 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1047                         {
1048                         /* 'al' set by ssl_parse_serverhello_tlsext */
1049                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1050                         goto f_err;
1051                         }
1052                 if (ssl_check_serverhello_tlsext(s) <= 0)
1053                         {
1054                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1055                                 goto err;
1056                         }
1057                 }
1058 #endif
1059
1060         if (p != (d+n))
1061                 {
1062                 /* wrong packet length */
1063                 al=SSL_AD_DECODE_ERROR;
1064                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1065                 goto f_err;
1066                 }
1067
1068         return(1);
1069 f_err:
1070         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1071 err:
1072         return(-1);
1073         }
1074
1075 int ssl3_get_server_certificate(SSL *s)
1076         {
1077         int al,i,ok,ret= -1;
1078         unsigned long n,nc,llen,l;
1079         X509 *x=NULL;
1080         const unsigned char *q,*p;
1081         unsigned char *d;
1082         STACK_OF(X509) *sk=NULL;
1083         SESS_CERT *sc;
1084         EVP_PKEY *pkey=NULL;
1085         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1086
1087         n=s->method->ssl_get_message(s,
1088                 SSL3_ST_CR_CERT_A,
1089                 SSL3_ST_CR_CERT_B,
1090                 -1,
1091                 s->max_cert_list,
1092                 &ok);
1093
1094         if (!ok) return((int)n);
1095
1096         if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1097                 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1098                 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1099                 {
1100                 s->s3->tmp.reuse_message=1;
1101                 return(1);
1102                 }
1103
1104         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1105                 {
1106                 al=SSL_AD_UNEXPECTED_MESSAGE;
1107                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1108                 goto f_err;
1109                 }
1110         p=d=(unsigned char *)s->init_msg;
1111
1112         if ((sk=sk_X509_new_null()) == NULL)
1113                 {
1114                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1115                 goto err;
1116                 }
1117
1118         n2l3(p,llen);
1119         if (llen+3 != n)
1120                 {
1121                 al=SSL_AD_DECODE_ERROR;
1122                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1123                 goto f_err;
1124                 }
1125         for (nc=0; nc<llen; )
1126                 {
1127                 n2l3(p,l);
1128                 if ((l+nc+3) > llen)
1129                         {
1130                         al=SSL_AD_DECODE_ERROR;
1131                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1132                         goto f_err;
1133                         }
1134
1135                 q=p;
1136                 x=d2i_X509(NULL,&q,l);
1137                 if (x == NULL)
1138                         {
1139                         al=SSL_AD_BAD_CERTIFICATE;
1140                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1141                         goto f_err;
1142                         }
1143                 if (q != (p+l))
1144                         {
1145                         al=SSL_AD_DECODE_ERROR;
1146                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1147                         goto f_err;
1148                         }
1149                 if (!sk_X509_push(sk,x))
1150                         {
1151                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1152                         goto err;
1153                         }
1154                 x=NULL;
1155                 nc+=l+3;
1156                 p=q;
1157                 }
1158
1159         i=ssl_verify_cert_chain(s,sk);
1160         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1161 #ifndef OPENSSL_NO_KRB5
1162             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1163                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1164 #endif /* OPENSSL_NO_KRB5 */
1165                 )
1166                 {
1167                 al=ssl_verify_alarm_type(s->verify_result);
1168                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1169                 goto f_err;
1170                 }
1171         ERR_clear_error(); /* but we keep s->verify_result */
1172
1173         sc=ssl_sess_cert_new();
1174         if (sc == NULL) goto err;
1175
1176         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1177         s->session->sess_cert=sc;
1178
1179         sc->cert_chain=sk;
1180         /* Inconsistency alert: cert_chain does include the peer's
1181          * certificate, which we don't include in s3_srvr.c */
1182         x=sk_X509_value(sk,0);
1183         sk=NULL;
1184         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1185
1186         pkey=X509_get_pubkey(x);
1187
1188         /* VRS: allow null cert if auth == KRB5 */
1189         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1190                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1191                     ? 0 : 1;
1192
1193 #ifdef KSSL_DEBUG
1194         printf("pkey,x = %p, %p\n", pkey,x);
1195         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1196         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1197                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1198 #endif    /* KSSL_DEBUG */
1199
1200         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1201                 {
1202                 x=NULL;
1203                 al=SSL3_AL_FATAL;
1204                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1205                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1206                 goto f_err;
1207                 }
1208
1209         i=ssl_cert_type(x,pkey);
1210         if (need_cert && i < 0)
1211                 {
1212                 x=NULL;
1213                 al=SSL3_AL_FATAL;
1214                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1215                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1216                 goto f_err;
1217                 }
1218
1219         if (need_cert)
1220                 {
1221                 sc->peer_cert_type=i;
1222                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1223                 /* Why would the following ever happen?
1224                  * We just created sc a couple of lines ago. */
1225                 if (sc->peer_pkeys[i].x509 != NULL)
1226                         X509_free(sc->peer_pkeys[i].x509);
1227                 sc->peer_pkeys[i].x509=x;
1228                 sc->peer_key= &(sc->peer_pkeys[i]);
1229
1230                 if (s->session->peer != NULL)
1231                         X509_free(s->session->peer);
1232                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1233                 s->session->peer=x;
1234                 }
1235         else
1236                 {
1237                 sc->peer_cert_type=i;
1238                 sc->peer_key= NULL;
1239
1240                 if (s->session->peer != NULL)
1241                         X509_free(s->session->peer);
1242                 s->session->peer=NULL;
1243                 }
1244         s->session->verify_result = s->verify_result;
1245
1246         x=NULL;
1247         ret=1;
1248
1249         if (0)
1250                 {
1251 f_err:
1252                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1253                 }
1254 err:
1255         EVP_PKEY_free(pkey);
1256         X509_free(x);
1257         sk_X509_pop_free(sk,X509_free);
1258         return(ret);
1259         }
1260
1261 int ssl3_get_key_exchange(SSL *s)
1262         {
1263 #ifndef OPENSSL_NO_RSA
1264         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1265 #endif
1266         EVP_MD_CTX md_ctx;
1267         unsigned char *param,*p;
1268         int al,i,j,param_len,ok;
1269         long n,alg_k,alg_a;
1270         EVP_PKEY *pkey=NULL;
1271         const EVP_MD *md = NULL;
1272 #ifndef OPENSSL_NO_RSA
1273         RSA *rsa=NULL;
1274 #endif
1275 #ifndef OPENSSL_NO_DH
1276         DH *dh=NULL;
1277 #endif
1278 #ifndef OPENSSL_NO_ECDH
1279         EC_KEY *ecdh = NULL;
1280         BN_CTX *bn_ctx = NULL;
1281         EC_POINT *srvr_ecpoint = NULL;
1282         int curve_nid = 0;
1283         int encoded_pt_len = 0;
1284 #endif
1285
1286         /* use same message size as in ssl3_get_certificate_request()
1287          * as ServerKeyExchange message may be skipped */
1288         n=s->method->ssl_get_message(s,
1289                 SSL3_ST_CR_KEY_EXCH_A,
1290                 SSL3_ST_CR_KEY_EXCH_B,
1291                 -1,
1292                 s->max_cert_list,
1293                 &ok);
1294         if (!ok) return((int)n);
1295
1296         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1297                 {
1298 #ifndef OPENSSL_NO_PSK
1299                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1300                    omitted if no identity hint is sent. Set
1301                    session->sess_cert anyway to avoid problems
1302                    later.*/
1303                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1304                         {
1305                         s->session->sess_cert=ssl_sess_cert_new();
1306                         if (s->ctx->psk_identity_hint)
1307                                 OPENSSL_free(s->ctx->psk_identity_hint);
1308                         s->ctx->psk_identity_hint = NULL;
1309                         }
1310 #endif
1311                 s->s3->tmp.reuse_message=1;
1312                 return(1);
1313                 }
1314
1315         param=p=(unsigned char *)s->init_msg;
1316         if (s->session->sess_cert != NULL)
1317                 {
1318 #ifndef OPENSSL_NO_RSA
1319                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1320                         {
1321                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1322                         s->session->sess_cert->peer_rsa_tmp=NULL;
1323                         }
1324 #endif
1325 #ifndef OPENSSL_NO_DH
1326                 if (s->session->sess_cert->peer_dh_tmp)
1327                         {
1328                         DH_free(s->session->sess_cert->peer_dh_tmp);
1329                         s->session->sess_cert->peer_dh_tmp=NULL;
1330                         }
1331 #endif
1332 #ifndef OPENSSL_NO_ECDH
1333                 if (s->session->sess_cert->peer_ecdh_tmp)
1334                         {
1335                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1336                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1337                         }
1338 #endif
1339                 }
1340         else
1341                 {
1342                 s->session->sess_cert=ssl_sess_cert_new();
1343                 }
1344
1345         param_len=0;
1346         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1347         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1348         EVP_MD_CTX_init(&md_ctx);
1349
1350 #ifndef OPENSSL_NO_PSK
1351         if (alg_k & SSL_kPSK)
1352                 {
1353                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1354
1355                 al=SSL_AD_HANDSHAKE_FAILURE;
1356                 n2s(p,i);
1357                 param_len=i+2;
1358                 /* Store PSK identity hint for later use, hint is used
1359                  * in ssl3_send_client_key_exchange.  Assume that the
1360                  * maximum length of a PSK identity hint can be as
1361                  * long as the maximum length of a PSK identity. */
1362                 if (i > PSK_MAX_IDENTITY_LEN)
1363                         {
1364                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1365                                 SSL_R_DATA_LENGTH_TOO_LONG);
1366                         goto f_err;
1367                         }
1368                 if (param_len > n)
1369                         {
1370                         al=SSL_AD_DECODE_ERROR;
1371                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1372                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1373                         goto f_err;
1374                         }
1375                 /* If received PSK identity hint contains NULL
1376                  * characters, the hint is truncated from the first
1377                  * NULL. p may not be ending with NULL, so create a
1378                  * NULL-terminated string. */
1379                 memcpy(tmp_id_hint, p, i);
1380                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1381                 if (s->ctx->psk_identity_hint != NULL)
1382                         OPENSSL_free(s->ctx->psk_identity_hint);
1383                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1384                 if (s->ctx->psk_identity_hint == NULL)
1385                         {
1386                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1387                         goto f_err;
1388                         }
1389
1390                 p+=i;
1391                 n-=param_len;
1392                 }
1393         else
1394 #endif /* !OPENSSL_NO_PSK */
1395 #ifndef OPENSSL_NO_SRP
1396         if (alg_k & SSL_kSRP)
1397                 {
1398                 n2s(p,i);
1399                 param_len=i+2;
1400                 if (param_len > n)
1401                         {
1402                         al=SSL_AD_DECODE_ERROR;
1403                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1404                         goto f_err;
1405                         }
1406                 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1407                         {
1408                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1409                         goto err;
1410                         }
1411                 p+=i;
1412
1413                 n2s(p,i);
1414                 param_len+=i+2;
1415                 if (param_len > n)
1416                         {
1417                         al=SSL_AD_DECODE_ERROR;
1418                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1419                         goto f_err;
1420                         }
1421                 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1422                         {
1423                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1424                         goto err;
1425                         }
1426                 p+=i;
1427
1428                 i = (unsigned int)(p[0]);
1429                 p++;
1430                 param_len+=i+1;
1431                 if (param_len > n)
1432                         {
1433                         al=SSL_AD_DECODE_ERROR;
1434                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1435                         goto f_err;
1436                         }
1437                 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1438                         {
1439                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1440                         goto err;
1441                         }
1442                 p+=i;
1443
1444                 n2s(p,i);
1445                 param_len+=i+2;
1446                 if (param_len > n)
1447                         {
1448                         al=SSL_AD_DECODE_ERROR;
1449                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1450                         goto f_err;
1451                         }
1452                 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1453                         {
1454                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1455                         goto err;
1456                         }
1457                 p+=i;
1458                 n-=param_len;
1459
1460 /* We must check if there is a certificate */
1461 #ifndef OPENSSL_NO_RSA
1462                 if (alg_a & SSL_aRSA)
1463                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1464 #else
1465                 if (0)
1466                         ;
1467 #endif
1468 #ifndef OPENSSL_NO_DSA
1469                 else if (alg_a & SSL_aDSS)
1470                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1471 #endif
1472                 }
1473         else
1474 #endif /* !OPENSSL_NO_SRP */
1475 #ifndef OPENSSL_NO_RSA
1476         if (alg_k & SSL_kRSA)
1477                 {
1478                 if ((rsa=RSA_new()) == NULL)
1479                         {
1480                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1481                         goto err;
1482                         }
1483                 n2s(p,i);
1484                 param_len=i+2;
1485                 if (param_len > n)
1486                         {
1487                         al=SSL_AD_DECODE_ERROR;
1488                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1489                         goto f_err;
1490                         }
1491                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1492                         {
1493                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1494                         goto err;
1495                         }
1496                 p+=i;
1497
1498                 n2s(p,i);
1499                 param_len+=i+2;
1500                 if (param_len > n)
1501                         {
1502                         al=SSL_AD_DECODE_ERROR;
1503                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1504                         goto f_err;
1505                         }
1506                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1507                         {
1508                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1509                         goto err;
1510                         }
1511                 p+=i;
1512                 n-=param_len;
1513
1514                 /* this should be because we are using an export cipher */
1515                 if (alg_a & SSL_aRSA)
1516                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1517                 else
1518                         {
1519                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1520                         goto err;
1521                         }
1522                 s->session->sess_cert->peer_rsa_tmp=rsa;
1523                 rsa=NULL;
1524                 }
1525 #else /* OPENSSL_NO_RSA */
1526         if (0)
1527                 ;
1528 #endif
1529 #ifndef OPENSSL_NO_DH
1530         else if (alg_k & SSL_kEDH)
1531                 {
1532                 if ((dh=DH_new()) == NULL)
1533                         {
1534                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1535                         goto err;
1536                         }
1537                 n2s(p,i);
1538                 param_len=i+2;
1539                 if (param_len > n)
1540                         {
1541                         al=SSL_AD_DECODE_ERROR;
1542                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1543                         goto f_err;
1544                         }
1545                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1546                         {
1547                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1548                         goto err;
1549                         }
1550                 p+=i;
1551
1552                 n2s(p,i);
1553                 param_len+=i+2;
1554                 if (param_len > n)
1555                         {
1556                         al=SSL_AD_DECODE_ERROR;
1557                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1558                         goto f_err;
1559                         }
1560                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1561                         {
1562                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1563                         goto err;
1564                         }
1565                 p+=i;
1566
1567                 n2s(p,i);
1568                 param_len+=i+2;
1569                 if (param_len > n)
1570                         {
1571                         al=SSL_AD_DECODE_ERROR;
1572                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1573                         goto f_err;
1574                         }
1575                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1576                         {
1577                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1578                         goto err;
1579                         }
1580                 p+=i;
1581                 n-=param_len;
1582
1583 #ifndef OPENSSL_NO_RSA
1584                 if (alg_a & SSL_aRSA)
1585                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1586 #else
1587                 if (0)
1588                         ;
1589 #endif
1590 #ifndef OPENSSL_NO_DSA
1591                 else if (alg_a & SSL_aDSS)
1592                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1593 #endif
1594                 /* else anonymous DH, so no certificate or pkey. */
1595
1596                 s->session->sess_cert->peer_dh_tmp=dh;
1597                 dh=NULL;
1598                 }
1599         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1600                 {
1601                 al=SSL_AD_ILLEGAL_PARAMETER;
1602                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1603                 goto f_err;
1604                 }
1605 #endif /* !OPENSSL_NO_DH */
1606
1607 #ifndef OPENSSL_NO_ECDH
1608         else if (alg_k & SSL_kEECDH)
1609                 {
1610                 EC_GROUP *ngroup;
1611                 const EC_GROUP *group;
1612
1613                 if ((ecdh=EC_KEY_new()) == NULL)
1614                         {
1615                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1616                         goto err;
1617                         }
1618
1619                 /* Extract elliptic curve parameters and the
1620                  * server's ephemeral ECDH public key.
1621                  * Keep accumulating lengths of various components in
1622                  * param_len and make sure it never exceeds n.
1623                  */
1624
1625                 /* XXX: For now we only support named (not generic) curves
1626                  * and the ECParameters in this case is just three bytes.
1627                  */
1628                 param_len=3;
1629                 if ((param_len > n) ||
1630                     (*p != NAMED_CURVE_TYPE) ||
1631                     ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1632                         {
1633                         al=SSL_AD_INTERNAL_ERROR;
1634                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1635                         goto f_err;
1636                         }
1637
1638                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1639                 if (ngroup == NULL)
1640                         {
1641                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1642                         goto err;
1643                         }
1644                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1645                         {
1646                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1647                         goto err;
1648                         }
1649                 EC_GROUP_free(ngroup);
1650
1651                 group = EC_KEY_get0_group(ecdh);
1652
1653                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1654                     (EC_GROUP_get_degree(group) > 163))
1655                         {
1656                         al=SSL_AD_EXPORT_RESTRICTION;
1657                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1658                         goto f_err;
1659                         }
1660
1661                 p+=3;
1662
1663                 /* Next, get the encoded ECPoint */
1664                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1665                     ((bn_ctx = BN_CTX_new()) == NULL))
1666                         {
1667                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1668                         goto err;
1669                         }
1670
1671                 encoded_pt_len = *p;  /* length of encoded point */
1672                 p+=1;
1673                 param_len += (1 + encoded_pt_len);
1674                 if ((param_len > n) ||
1675                     (EC_POINT_oct2point(group, srvr_ecpoint,
1676                         p, encoded_pt_len, bn_ctx) == 0))
1677                         {
1678                         al=SSL_AD_DECODE_ERROR;
1679                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1680                         goto f_err;
1681                         }
1682
1683                 n-=param_len;
1684                 p+=encoded_pt_len;
1685
1686                 /* The ECC/TLS specification does not mention
1687                  * the use of DSA to sign ECParameters in the server
1688                  * key exchange message. We do support RSA and ECDSA.
1689                  */
1690                 if (0) ;
1691 #ifndef OPENSSL_NO_RSA
1692                 else if (alg_a & SSL_aRSA)
1693                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1694 #endif
1695 #ifndef OPENSSL_NO_ECDSA
1696                 else if (alg_a & SSL_aECDSA)
1697                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1698 #endif
1699                 /* else anonymous ECDH, so no certificate or pkey. */
1700                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1701                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1702                 ecdh=NULL;
1703                 BN_CTX_free(bn_ctx);
1704                 bn_ctx = NULL;
1705                 EC_POINT_free(srvr_ecpoint);
1706                 srvr_ecpoint = NULL;
1707                 }
1708         else if (alg_k)
1709                 {
1710                 al=SSL_AD_UNEXPECTED_MESSAGE;
1711                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1712                 goto f_err;
1713                 }
1714 #endif /* !OPENSSL_NO_ECDH */
1715
1716
1717         /* p points to the next byte, there are 'n' bytes left */
1718
1719         /* if it was signed, check the signature */
1720         if (pkey != NULL)
1721                 {
1722                 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1723                         {
1724                         int sigalg = tls12_get_sigid(pkey);
1725                         /* Should never happen */
1726                         if (sigalg == -1)
1727                                 {
1728                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1729                                 goto err;
1730                                 }
1731                         /* Check key type is consistent with signature */
1732                         if (sigalg != (int)p[1])
1733                                 {
1734                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1735                                 al=SSL_AD_DECODE_ERROR;
1736                                 goto f_err;
1737                                 }
1738                         md = tls12_get_hash(p[0]);
1739                         if (md == NULL)
1740                                 {
1741                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1742                                 al=SSL_AD_DECODE_ERROR;
1743                                 goto f_err;
1744                                 }
1745 #ifdef SSL_DEBUG
1746 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1747 #endif
1748                         p += 2;
1749                         n -= 2;
1750                         }
1751                 else
1752                         md = EVP_sha1();
1753
1754                 n2s(p,i);
1755                 n-=2;
1756                 j=EVP_PKEY_size(pkey);
1757
1758                 if ((i != n) || (n > j) || (n <= 0))
1759                         {
1760                         /* wrong packet length */
1761                         al=SSL_AD_DECODE_ERROR;
1762                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1763                         goto f_err;
1764                         }
1765
1766 #ifndef OPENSSL_NO_RSA
1767                 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1768                         {
1769                         int num;
1770
1771                         j=0;
1772                         q=md_buf;
1773                         for (num=2; num > 0; num--)
1774                                 {
1775                                 EVP_MD_CTX_set_flags(&md_ctx,
1776                                         EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1777                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1778                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1779                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1780                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1781                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1782                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1783                                 q+=i;
1784                                 j+=i;
1785                                 }
1786                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1787                                                                 pkey->pkey.rsa);
1788                         if (i < 0)
1789                                 {
1790                                 al=SSL_AD_DECRYPT_ERROR;
1791                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1792                                 goto f_err;
1793                                 }
1794                         if (i == 0)
1795                                 {
1796                                 /* bad signature */
1797                                 al=SSL_AD_DECRYPT_ERROR;
1798                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1799                                 goto f_err;
1800                                 }
1801                         }
1802                 else
1803 #endif
1804                         {
1805                         EVP_VerifyInit_ex(&md_ctx, md, NULL);
1806                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1807                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1808                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1809                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1810                                 {
1811                                 /* bad signature */
1812                                 al=SSL_AD_DECRYPT_ERROR;
1813                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1814                                 goto f_err;
1815                                 }
1816                         }
1817                 }
1818         else
1819                 {
1820                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1821                         /* aNULL or kPSK do not need public keys */
1822                         {
1823                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1824                         goto err;
1825                         }
1826                 /* still data left over */
1827                 if (n != 0)
1828                         {
1829                         al=SSL_AD_DECODE_ERROR;
1830                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1831                         goto f_err;
1832                         }
1833                 }
1834         EVP_PKEY_free(pkey);
1835         EVP_MD_CTX_cleanup(&md_ctx);
1836         return(1);
1837 f_err:
1838         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1839 err:
1840         EVP_PKEY_free(pkey);
1841 #ifndef OPENSSL_NO_RSA
1842         if (rsa != NULL)
1843                 RSA_free(rsa);
1844 #endif
1845 #ifndef OPENSSL_NO_DH
1846         if (dh != NULL)
1847                 DH_free(dh);
1848 #endif
1849 #ifndef OPENSSL_NO_ECDH
1850         BN_CTX_free(bn_ctx);
1851         EC_POINT_free(srvr_ecpoint);
1852         if (ecdh != NULL)
1853                 EC_KEY_free(ecdh);
1854 #endif
1855         EVP_MD_CTX_cleanup(&md_ctx);
1856         return(-1);
1857         }
1858
1859 int ssl3_get_certificate_request(SSL *s)
1860         {
1861         int ok,ret=0;
1862         unsigned long n,nc,l;
1863         unsigned int llen, ctype_num,i;
1864         X509_NAME *xn=NULL;
1865         const unsigned char *p,*q;
1866         unsigned char *d;
1867         STACK_OF(X509_NAME) *ca_sk=NULL;
1868
1869         n=s->method->ssl_get_message(s,
1870                 SSL3_ST_CR_CERT_REQ_A,
1871                 SSL3_ST_CR_CERT_REQ_B,
1872                 -1,
1873                 s->max_cert_list,
1874                 &ok);
1875
1876         if (!ok) return((int)n);
1877
1878         s->s3->tmp.cert_req=0;
1879
1880         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1881                 {
1882                 s->s3->tmp.reuse_message=1;
1883                 /* If we get here we don't need any cached handshake records
1884                  * as we wont be doing client auth.
1885                  */
1886                 if (s->s3->handshake_buffer)
1887                         {
1888                         if (!ssl3_digest_cached_records(s))
1889                                 goto err;
1890                         }
1891                 return(1);
1892                 }
1893
1894         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1895                 {
1896                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1897                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1898                 goto err;
1899                 }
1900
1901         /* TLS does not like anon-DH with client cert */
1902         if (s->version > SSL3_VERSION)
1903                 {
1904                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1905                         {
1906                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1907                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1908                         goto err;
1909                         }
1910                 }
1911
1912         p=d=(unsigned char *)s->init_msg;
1913
1914         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1915                 {
1916                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1917                 goto err;
1918                 }
1919
1920         /* get the certificate types */
1921         ctype_num= *(p++);
1922         if (ctype_num > SSL3_CT_NUMBER)
1923                 ctype_num=SSL3_CT_NUMBER;
1924         for (i=0; i<ctype_num; i++)
1925                 s->s3->tmp.ctype[i]= p[i];
1926         p+=ctype_num;
1927         if (TLS1_get_version(s) >= TLS1_2_VERSION)
1928                 {
1929                 n2s(p, llen);
1930                 /* Check we have enough room for signature algorithms and
1931                  * following length value.
1932                  */
1933                 if ((unsigned long)(p - d + llen + 2) > n)
1934                         {
1935                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1936                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1937                         goto err;
1938                         }
1939                 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1940                         {
1941                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1942                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1943                         goto err;
1944                         }
1945                 p += llen;
1946                 }
1947
1948         /* get the CA RDNs */
1949         n2s(p,llen);
1950 #if 0
1951 {
1952 FILE *out;
1953 out=fopen("/tmp/vsign.der","w");
1954 fwrite(p,1,llen,out);
1955 fclose(out);
1956 }
1957 #endif
1958
1959         if ((unsigned long)(p - d + llen) != n)
1960                 {
1961                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1962                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1963                 goto err;
1964                 }
1965
1966         for (nc=0; nc<llen; )
1967                 {
1968                 n2s(p,l);
1969                 if ((l+nc+2) > llen)
1970                         {
1971                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1972                                 goto cont; /* netscape bugs */
1973                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1974                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1975                         goto err;
1976                         }
1977
1978                 q=p;
1979
1980                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1981                         {
1982                         /* If netscape tolerance is on, ignore errors */
1983                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1984                                 goto cont;
1985                         else
1986                                 {
1987                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1988                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1989                                 goto err;
1990                                 }
1991                         }
1992
1993                 if (q != (p+l))
1994                         {
1995                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1996                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1997                         goto err;
1998                         }
1999                 if (!sk_X509_NAME_push(ca_sk,xn))
2000                         {
2001                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2002                         goto err;
2003                         }
2004
2005                 p+=l;
2006                 nc+=l+2;
2007                 }
2008
2009         if (0)
2010                 {
2011 cont:
2012                 ERR_clear_error();
2013                 }
2014
2015         /* we should setup a certificate to return.... */
2016         s->s3->tmp.cert_req=1;
2017         s->s3->tmp.ctype_num=ctype_num;
2018         if (s->s3->tmp.ca_names != NULL)
2019                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2020         s->s3->tmp.ca_names=ca_sk;
2021         ca_sk=NULL;
2022
2023         ret=1;
2024 err:
2025         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2026         return(ret);
2027         }
2028
2029 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2030         {
2031         return(X509_NAME_cmp(*a,*b));
2032         }
2033 #ifndef OPENSSL_NO_TLSEXT
2034 int ssl3_get_new_session_ticket(SSL *s)
2035         {
2036         int ok,al,ret=0, ticklen;
2037         long n;
2038         const unsigned char *p;
2039         unsigned char *d;
2040
2041         n=s->method->ssl_get_message(s,
2042                 SSL3_ST_CR_SESSION_TICKET_A,
2043                 SSL3_ST_CR_SESSION_TICKET_B,
2044                 -1,
2045                 16384,
2046                 &ok);
2047
2048         if (!ok)
2049                 return((int)n);
2050
2051         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2052                 {
2053                 s->s3->tmp.reuse_message=1;
2054                 return(1);
2055                 }
2056         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2057                 {
2058                 al=SSL_AD_UNEXPECTED_MESSAGE;
2059                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2060                 goto f_err;
2061                 }
2062         if (n < 6)
2063                 {
2064                 /* need at least ticket_lifetime_hint + ticket length */
2065                 al = SSL_AD_DECODE_ERROR;
2066                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2067                 goto f_err;
2068                 }
2069
2070         p=d=(unsigned char *)s->init_msg;
2071         n2l(p, s->session->tlsext_tick_lifetime_hint);
2072         n2s(p, ticklen);
2073         /* ticket_lifetime_hint + ticket_length + ticket */
2074         if (ticklen + 6 != n)
2075                 {
2076                 al = SSL_AD_DECODE_ERROR;
2077                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2078                 goto f_err;
2079                 }
2080         if (s->session->tlsext_tick)
2081                 {
2082                 OPENSSL_free(s->session->tlsext_tick);
2083                 s->session->tlsext_ticklen = 0;
2084                 }
2085         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2086         if (!s->session->tlsext_tick)
2087                 {
2088                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2089                 goto err;
2090                 }
2091         memcpy(s->session->tlsext_tick, p, ticklen);
2092         s->session->tlsext_ticklen = ticklen;
2093         /* There are two ways to detect a resumed ticket sesion.
2094          * One is to set an appropriate session ID and then the server
2095          * must return a match in ServerHello. This allows the normal
2096          * client session ID matching to work and we know much
2097          * earlier that the ticket has been accepted.
2098          *
2099          * The other way is to set zero length session ID when the
2100          * ticket is presented and rely on the handshake to determine
2101          * session resumption.
2102          *
2103          * We choose the former approach because this fits in with
2104          * assumptions elsewhere in OpenSSL. The session ID is set
2105          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2106          * ticket.
2107          */
2108         EVP_Digest(p, ticklen,
2109                         s->session->session_id, &s->session->session_id_length,
2110 #ifndef OPENSSL_NO_SHA256
2111                                                         EVP_sha256(), NULL);
2112 #else
2113                                                         EVP_sha1(), NULL);
2114 #endif
2115         ret=1;
2116         return(ret);
2117 f_err:
2118         ssl3_send_alert(s,SSL3_AL_FATAL,al);
2119 err:
2120         return(-1);
2121         }
2122
2123 int ssl3_get_cert_status(SSL *s)
2124         {
2125         int ok, al;
2126         unsigned long resplen,n;
2127         const unsigned char *p;
2128
2129         n=s->method->ssl_get_message(s,
2130                 SSL3_ST_CR_CERT_STATUS_A,
2131                 SSL3_ST_CR_CERT_STATUS_B,
2132                 SSL3_MT_CERTIFICATE_STATUS,
2133                 16384,
2134                 &ok);
2135
2136         if (!ok) return((int)n);
2137         if (n < 4)
2138                 {
2139                 /* need at least status type + length */
2140                 al = SSL_AD_DECODE_ERROR;
2141                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2142                 goto f_err;
2143                 }
2144         p = (unsigned char *)s->init_msg;
2145         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2146                 {
2147                 al = SSL_AD_DECODE_ERROR;
2148                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2149                 goto f_err;
2150                 }
2151         n2l3(p, resplen);
2152         if (resplen + 4 != n)
2153                 {
2154                 al = SSL_AD_DECODE_ERROR;
2155                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2156                 goto f_err;
2157                 }
2158         if (s->tlsext_ocsp_resp)
2159                 OPENSSL_free(s->tlsext_ocsp_resp);
2160         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2161         if (!s->tlsext_ocsp_resp)
2162                 {
2163                 al = SSL_AD_INTERNAL_ERROR;
2164                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2165                 goto f_err;
2166                 }
2167         s->tlsext_ocsp_resplen = resplen;
2168         if (s->ctx->tlsext_status_cb)
2169                 {
2170                 int ret;
2171                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2172                 if (ret == 0)
2173                         {
2174                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2175                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2176                         goto f_err;
2177                         }
2178                 if (ret < 0)
2179                         {
2180                         al = SSL_AD_INTERNAL_ERROR;
2181                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2182                         goto f_err;
2183                         }
2184                 }
2185         return 1;
2186 f_err:
2187         ssl3_send_alert(s,SSL3_AL_FATAL,al);
2188         return(-1);
2189         }
2190 #endif
2191
2192 int ssl3_get_server_done(SSL *s)
2193         {
2194         int ok,ret=0;
2195         long n;
2196
2197         n=s->method->ssl_get_message(s,
2198                 SSL3_ST_CR_SRVR_DONE_A,
2199                 SSL3_ST_CR_SRVR_DONE_B,
2200                 SSL3_MT_SERVER_DONE,
2201                 30, /* should be very small, like 0 :-) */
2202                 &ok);
2203
2204         if (!ok) return((int)n);
2205         if (n > 0)
2206                 {
2207                 /* should contain no data */
2208                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2209                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2210                 return -1;
2211                 }
2212         ret=1;
2213         return(ret);
2214         }
2215
2216
2217 int ssl3_send_client_key_exchange(SSL *s)
2218         {
2219         unsigned char *p,*d;
2220         int n;
2221         unsigned long alg_k;
2222 #ifndef OPENSSL_NO_RSA
2223         unsigned char *q;
2224         EVP_PKEY *pkey=NULL;
2225 #endif
2226 #ifndef OPENSSL_NO_KRB5
2227         KSSL_ERR kssl_err;
2228 #endif /* OPENSSL_NO_KRB5 */
2229 #ifndef OPENSSL_NO_ECDH
2230         EC_KEY *clnt_ecdh = NULL;
2231         const EC_POINT *srvr_ecpoint = NULL;
2232         EVP_PKEY *srvr_pub_pkey = NULL;
2233         unsigned char *encodedPoint = NULL;
2234         int encoded_pt_len = 0;
2235         BN_CTX * bn_ctx = NULL;
2236 #endif
2237
2238         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2239                 {
2240                 d=(unsigned char *)s->init_buf->data;
2241                 p= &(d[4]);
2242
2243                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2244
2245                 /* Fool emacs indentation */
2246                 if (0) {}
2247 #ifndef OPENSSL_NO_RSA
2248                 else if (alg_k & SSL_kRSA)
2249                         {
2250                         RSA *rsa;
2251                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2252
2253                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2254                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2255                         else
2256                                 {
2257                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2258                                 if ((pkey == NULL) ||
2259                                         (pkey->type != EVP_PKEY_RSA) ||
2260                                         (pkey->pkey.rsa == NULL))
2261                                         {
2262                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2263                                         goto err;
2264                                         }
2265                                 rsa=pkey->pkey.rsa;
2266                                 EVP_PKEY_free(pkey);
2267                                 }
2268
2269                         tmp_buf[0]=s->client_version>>8;
2270                         tmp_buf[1]=s->client_version&0xff;
2271                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2272                                         goto err;
2273
2274                         s->session->master_key_length=sizeof tmp_buf;
2275
2276                         q=p;
2277                         /* Fix buf for TLS and beyond */
2278                         if (s->version > SSL3_VERSION)
2279                                 p+=2;
2280                         n=RSA_public_encrypt(sizeof tmp_buf,
2281                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2282 #ifdef PKCS1_CHECK
2283                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2284                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2285 #endif
2286                         if (n <= 0)
2287                                 {
2288                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2289                                 goto err;
2290                                 }
2291
2292                         /* Fix buf for TLS and beyond */
2293                         if (s->version > SSL3_VERSION)
2294                                 {
2295                                 s2n(n,q);
2296                                 n+=2;
2297                                 }
2298
2299                         s->session->master_key_length=
2300                                 s->method->ssl3_enc->generate_master_secret(s,
2301                                         s->session->master_key,
2302                                         tmp_buf,sizeof tmp_buf);
2303                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2304                         }
2305 #endif
2306 #ifndef OPENSSL_NO_KRB5
2307                 else if (alg_k & SSL_kKRB5)
2308                         {
2309                         krb5_error_code krb5rc;
2310                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2311                         /*  krb5_data   krb5_ap_req;  */
2312                         krb5_data       *enc_ticket;
2313                         krb5_data       authenticator, *authp = NULL;
2314                         EVP_CIPHER_CTX  ciph_ctx;
2315                         const EVP_CIPHER *enc = NULL;
2316                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2317                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2318                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
2319                                                 + EVP_MAX_IV_LENGTH];
2320                         int             padl, outl = sizeof(epms);
2321
2322                         EVP_CIPHER_CTX_init(&ciph_ctx);
2323
2324 #ifdef KSSL_DEBUG
2325                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2326                                 alg_k, SSL_kKRB5);
2327 #endif  /* KSSL_DEBUG */
2328
2329                         authp = NULL;
2330 #ifdef KRB5SENDAUTH
2331                         if (KRB5SENDAUTH)  authp = &authenticator;
2332 #endif  /* KRB5SENDAUTH */
2333
2334                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2335                                 &kssl_err);
2336                         enc = kssl_map_enc(kssl_ctx->enctype);
2337                         if (enc == NULL)
2338                             goto err;
2339 #ifdef KSSL_DEBUG
2340                         {
2341                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2342                         if (krb5rc && kssl_err.text)
2343                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2344                         }
2345 #endif  /* KSSL_DEBUG */
2346
2347                         if (krb5rc)
2348                                 {
2349                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2350                                                 SSL_AD_HANDSHAKE_FAILURE);
2351                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2352                                                 kssl_err.reason);
2353                                 goto err;
2354                                 }
2355
2356                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2357                         **  in place of RFC 2712 KerberosWrapper, as in:
2358                         **
2359                         **  Send ticket (copy to *p, set n = length)
2360                         **  n = krb5_ap_req.length;
2361                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2362                         **  if (krb5_ap_req.data)
2363                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2364                         **
2365                         **  Now using real RFC 2712 KerberosWrapper
2366                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2367                         **  Note: 2712 "opaque" types are here replaced
2368                         **  with a 2-byte length followed by the value.
2369                         **  Example:
2370                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2371                         **  Where "xx xx" = length bytes.  Shown here with
2372                         **  optional authenticator omitted.
2373                         */
2374
2375                         /*  KerberosWrapper.Ticket              */
2376                         s2n(enc_ticket->length,p);
2377                         memcpy(p, enc_ticket->data, enc_ticket->length);
2378                         p+= enc_ticket->length;
2379                         n = enc_ticket->length + 2;
2380
2381                         /*  KerberosWrapper.Authenticator       */
2382                         if (authp  &&  authp->length)
2383                                 {
2384                                 s2n(authp->length,p);
2385                                 memcpy(p, authp->data, authp->length);
2386                                 p+= authp->length;
2387                                 n+= authp->length + 2;
2388
2389                                 free(authp->data);
2390                                 authp->data = NULL;
2391                                 authp->length = 0;
2392                                 }
2393                         else
2394                                 {
2395                                 s2n(0,p);/*  null authenticator length  */
2396                                 n+=2;
2397                                 }
2398
2399                             tmp_buf[0]=s->client_version>>8;
2400                             tmp_buf[1]=s->client_version&0xff;
2401                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2402                                 goto err;
2403
2404                         /*  20010420 VRS.  Tried it this way; failed.
2405                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2406                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2407                         **                              kssl_ctx->length);
2408                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2409                         */
2410
2411                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2412                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2413                                 kssl_ctx->key,iv);
2414                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2415                                 sizeof tmp_buf);
2416                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2417                         outl += padl;
2418                         if (outl > (int)sizeof epms)
2419                                 {
2420                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2421                                 goto err;
2422                                 }
2423                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2424
2425                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2426                         s2n(outl,p);
2427                         memcpy(p, epms, outl);
2428                         p+=outl;
2429                         n+=outl + 2;
2430
2431                         s->session->master_key_length=
2432                                 s->method->ssl3_enc->generate_master_secret(s,
2433                                         s->session->master_key,
2434                                         tmp_buf, sizeof tmp_buf);
2435
2436                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2437                         OPENSSL_cleanse(epms, outl);
2438                         }
2439 #endif
2440 #ifndef OPENSSL_NO_DH
2441                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2442                         {
2443                         DH *dh_srvr,*dh_clnt;
2444
2445                         if (s->session->sess_cert == NULL)
2446                                 {
2447                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2448                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2449                                 goto err;
2450                                 }
2451
2452                         if (s->session->sess_cert->peer_dh_tmp != NULL)
2453                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2454                         else
2455                                 {
2456                                 /* we get them from the cert */
2457                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2458                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2459                                 goto err;
2460                                 }
2461
2462                         /* generate a new random key */
2463                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2464                                 {
2465                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2466                                 goto err;
2467                                 }
2468                         if (!DH_generate_key(dh_clnt))
2469                                 {
2470                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2471                                 DH_free(dh_clnt);
2472                                 goto err;
2473                                 }
2474
2475                         /* use the 'p' output buffer for the DH key, but
2476                          * make sure to clear it out afterwards */
2477
2478                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2479
2480                         if (n <= 0)
2481                                 {
2482                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2483                                 DH_free(dh_clnt);
2484                                 goto err;
2485                                 }
2486
2487                         /* generate master key from the result */
2488                         s->session->master_key_length=
2489                                 s->method->ssl3_enc->generate_master_secret(s,
2490                                         s->session->master_key,p,n);
2491                         /* clean up */
2492                         memset(p,0,n);
2493
2494                         /* send off the data */
2495                         n=BN_num_bytes(dh_clnt->pub_key);
2496                         s2n(n,p);
2497                         BN_bn2bin(dh_clnt->pub_key,p);
2498                         n+=2;
2499
2500                         DH_free(dh_clnt);
2501
2502                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2503                         }
2504 #endif
2505
2506 #ifndef OPENSSL_NO_ECDH
2507                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2508                         {
2509                         const EC_GROUP *srvr_group = NULL;
2510                         EC_KEY *tkey;
2511                         int ecdh_clnt_cert = 0;
2512                         int field_size = 0;
2513
2514                         /* Did we send out the client's
2515                          * ECDH share for use in premaster
2516                          * computation as part of client certificate?
2517                          * If so, set ecdh_clnt_cert to 1.
2518                          */
2519                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2520                                 {
2521                                 /* XXX: For now, we do not support client
2522                                  * authentication using ECDH certificates.
2523                                  * To add such support, one needs to add
2524                                  * code that checks for appropriate
2525                                  * conditions and sets ecdh_clnt_cert to 1.
2526                                  * For example, the cert have an ECC
2527                                  * key on the same curve as the server's
2528                                  * and the key should be authorized for
2529                                  * key agreement.
2530                                  *
2531                                  * One also needs to add code in ssl3_connect
2532                                  * to skip sending the certificate verify
2533                                  * message.
2534                                  *
2535                                  * if ((s->cert->key->privatekey != NULL) &&
2536                                  *     (s->cert->key->privatekey->type ==
2537                                  *      EVP_PKEY_EC) && ...)
2538                                  * ecdh_clnt_cert = 1;
2539                                  */
2540                                 }
2541
2542                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2543                                 {
2544                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2545                                 }
2546                         else
2547                                 {
2548                                 /* Get the Server Public Key from Cert */
2549                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2550                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2551                                 if ((srvr_pub_pkey == NULL) ||
2552                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2553                                     (srvr_pub_pkey->pkey.ec == NULL))
2554                                         {
2555                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2556                                             ERR_R_INTERNAL_ERROR);
2557                                         goto err;
2558                                         }
2559
2560                                 tkey = srvr_pub_pkey->pkey.ec;
2561                                 }
2562
2563                         srvr_group   = EC_KEY_get0_group(tkey);
2564                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2565
2566                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2567                                 {
2568                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2569                                     ERR_R_INTERNAL_ERROR);
2570                                 goto err;
2571                                 }
2572
2573                         if ((clnt_ecdh=EC_KEY_new()) == NULL)
2574                                 {
2575                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2576                                 goto err;
2577                                 }
2578
2579                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2580                                 {
2581                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2582                                 goto err;
2583                                 }
2584                         if (ecdh_clnt_cert)
2585                                 {
2586                                 /* Reuse key info from our certificate
2587                                  * We only need our private key to perform
2588                                  * the ECDH computation.
2589                                  */
2590                                 const BIGNUM *priv_key;
2591                                 tkey = s->cert->key->privatekey->pkey.ec;
2592                                 priv_key = EC_KEY_get0_private_key(tkey);
2593                                 if (priv_key == NULL)
2594                                         {
2595                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2596                                         goto err;
2597                                         }
2598                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2599                                         {
2600                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2601                                         goto err;
2602                                         }
2603                                 }
2604                         else
2605                                 {
2606                                 /* Generate a new ECDH key pair */
2607                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2608                                         {
2609                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2610                                         goto err;
2611                                         }
2612                                 }
2613
2614                         /* use the 'p' output buffer for the ECDH key, but
2615                          * make sure to clear it out afterwards
2616                          */
2617
2618                         field_size = EC_GROUP_get_degree(srvr_group);
2619                         if (field_size <= 0)
2620                                 {
2621                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2622                                        ERR_R_ECDH_LIB);
2623                                 goto err;
2624                                 }
2625                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2626                         if (n <= 0)
2627                                 {
2628                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2629                                        ERR_R_ECDH_LIB);
2630                                 goto err;
2631                                 }
2632
2633                         /* generate master key from the result */
2634                         s->session->master_key_length = s->method->ssl3_enc \
2635                             -> generate_master_secret(s,
2636                                 s->session->master_key,
2637                                 p, n);
2638
2639                         memset(p, 0, n); /* clean up */
2640
2641                         if (ecdh_clnt_cert)
2642                                 {
2643                                 /* Send empty client key exch message */
2644                                 n = 0;
2645                                 }
2646                         else
2647                                 {
2648                                 /* First check the size of encoding and
2649                                  * allocate memory accordingly.
2650                                  */
2651                                 encoded_pt_len =
2652                                     EC_POINT_point2oct(srvr_group,
2653                                         EC_KEY_get0_public_key(clnt_ecdh),
2654                                         POINT_CONVERSION_UNCOMPRESSED,
2655                                         NULL, 0, NULL);
2656
2657                                 encodedPoint = (unsigned char *)
2658                                     OPENSSL_malloc(encoded_pt_len *
2659                                         sizeof(unsigned char));
2660                                 bn_ctx = BN_CTX_new();
2661                                 if ((encodedPoint == NULL) ||
2662                                     (bn_ctx == NULL))
2663                                         {
2664                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2665                                         goto err;
2666                                         }
2667
2668                                 /* Encode the public key */
2669                                 n = EC_POINT_point2oct(srvr_group,
2670                                     EC_KEY_get0_public_key(clnt_ecdh),
2671                                     POINT_CONVERSION_UNCOMPRESSED,
2672                                     encodedPoint, encoded_pt_len, bn_ctx);
2673
2674                                 *p = n; /* length of encoded point */
2675                                 /* Encoded point will be copied here */
2676                                 p += 1;
2677                                 /* copy the point */
2678                                 memcpy((unsigned char *)p, encodedPoint, n);
2679                                 /* increment n to account for length field */
2680                                 n += 1;
2681                                 }
2682
2683                         /* Free allocated memory */
2684                         BN_CTX_free(bn_ctx);
2685                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2686                         if (clnt_ecdh != NULL)
2687                                  EC_KEY_free(clnt_ecdh);
2688                         EVP_PKEY_free(srvr_pub_pkey);
2689                         }
2690 #endif /* !OPENSSL_NO_ECDH */
2691                 else if (alg_k & SSL_kGOST)
2692                         {
2693                         /* GOST key exchange message creation */
2694                         EVP_PKEY_CTX *pkey_ctx;
2695                         X509 *peer_cert;
2696                         size_t msglen;
2697                         unsigned int md_len;
2698                         int keytype;
2699                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2700                         EVP_MD_CTX *ukm_hash;
2701                         EVP_PKEY *pub_key;
2702
2703                         /* Get server sertificate PKEY and create ctx from it */
2704                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2705                         if (!peer_cert)
2706                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2707                         if (!peer_cert)         {
2708                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2709                                         goto err;
2710                                 }
2711
2712                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2713                         /* If we have send a certificate, and certificate key
2714
2715                          * parameters match those of server certificate, use
2716                          * certificate key for key exchange
2717                          */
2718
2719                          /* Otherwise, generate ephemeral key pair */
2720
2721                         EVP_PKEY_encrypt_init(pkey_ctx);
2722                           /* Generate session key */
2723                     RAND_bytes(premaster_secret,32);
2724                         /* If we have client certificate, use its secret as peer key */
2725                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2726                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2727                                         /* If there was an error - just ignore it. Ephemeral key
2728                                         * would be used
2729                                         */
2730                                         ERR_clear_error();
2731                                 }
2732                         }
2733                         /* Compute shared IV and store it in algorithm-specific
2734                          * context data */
2735                         ukm_hash = EVP_MD_CTX_create();
2736                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2737                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2738                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2739                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2740                         EVP_MD_CTX_destroy(ukm_hash);
2741                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2742                                 8,shared_ukm)<0) {
2743                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2744                                                 SSL_R_LIBRARY_BUG);
2745                                         goto err;
2746                                 }
2747                         /* Make GOST keytransport blob message */
2748                         /*Encapsulate it into sequence */
2749                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2750                         msglen=255;
2751                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2752                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2753                                         SSL_R_LIBRARY_BUG);
2754                                 goto err;
2755                         }
2756                         if (msglen >= 0x80)
2757                                 {
2758                                 *(p++)=0x81;
2759                                 *(p++)= msglen & 0xff;
2760                                 n=msglen+3;
2761                                 }
2762                         else
2763                                 {
2764                                 *(p++)= msglen & 0xff;
2765                                 n=msglen+2;
2766                                 }
2767                         memcpy(p, tmp, msglen);
2768                         /* Check if pubkey from client certificate was used */
2769                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2770                                 {
2771                                 /* Set flag "skip certificate verify" */
2772                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2773                                 }
2774                         EVP_PKEY_CTX_free(pkey_ctx);
2775                         s->session->master_key_length=
2776                                 s->method->ssl3_enc->generate_master_secret(s,
2777                                         s->session->master_key,premaster_secret,32);
2778                         EVP_PKEY_free(pub_key);
2779
2780                         }
2781 #ifndef OPENSSL_NO_SRP
2782                 else if (alg_k & SSL_kSRP)
2783                         {
2784                         if (s->srp_ctx.A != NULL)
2785                                 {
2786                                 /* send off the data */
2787                                 n=BN_num_bytes(s->srp_ctx.A);
2788                                 s2n(n,p);
2789                                 BN_bn2bin(s->srp_ctx.A,p);
2790                                 n+=2;
2791                                 }
2792                         else
2793                                 {
2794                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2795                                 goto err;
2796                                 }
2797                         if (s->session->srp_username != NULL)
2798                                 OPENSSL_free(s->session->srp_username);
2799                         s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2800                         if (s->session->srp_username == NULL)
2801                                 {
2802                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2803                                         ERR_R_MALLOC_FAILURE);
2804                                 goto err;
2805                                 }
2806
2807                         if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2808                                 {
2809                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2810                                 goto err;
2811                                 }
2812                         }
2813 #endif
2814 #ifndef OPENSSL_NO_PSK
2815                 else if (alg_k & SSL_kPSK)
2816                         {
2817                         char identity[PSK_MAX_IDENTITY_LEN];
2818                         unsigned char *t = NULL;
2819                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2820                         unsigned int pre_ms_len = 0, psk_len = 0;
2821                         int psk_err = 1;
2822
2823                         n = 0;
2824                         if (s->psk_client_callback == NULL)
2825                                 {
2826                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2827                                         SSL_R_PSK_NO_CLIENT_CB);
2828                                 goto err;
2829                                 }
2830
2831                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2832                                 identity, PSK_MAX_IDENTITY_LEN,
2833                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2834                         if (psk_len > PSK_MAX_PSK_LEN)
2835                                 {
2836                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2837                                         ERR_R_INTERNAL_ERROR);
2838                                 goto psk_err;
2839                                 }
2840                         else if (psk_len == 0)
2841                                 {
2842                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2843                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2844                                 goto psk_err;
2845                                 }
2846
2847                         /* create PSK pre_master_secret */
2848                         pre_ms_len = 2+psk_len+2+psk_len;
2849                         t = psk_or_pre_ms;
2850                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2851                         s2n(psk_len, t);
2852                         memset(t, 0, psk_len);
2853                         t+=psk_len;
2854                         s2n(psk_len, t);
2855
2856                         if (s->session->psk_identity_hint != NULL)
2857                                 OPENSSL_free(s->session->psk_identity_hint);
2858                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2859                         if (s->ctx->psk_identity_hint != NULL &&
2860                                 s->session->psk_identity_hint == NULL)
2861                                 {
2862                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2863                                         ERR_R_MALLOC_FAILURE);
2864                                 goto psk_err;
2865                                 }
2866
2867                         if (s->session->psk_identity != NULL)
2868                                 OPENSSL_free(s->session->psk_identity);
2869                         s->session->psk_identity = BUF_strdup(identity);
2870                         if (s->session->psk_identity == NULL)
2871                                 {
2872                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2873                                         ERR_R_MALLOC_FAILURE);
2874                                 goto psk_err;
2875                                 }
2876
2877                         s->session->master_key_length =
2878                                 s->method->ssl3_enc->generate_master_secret(s,
2879                                         s->session->master_key,
2880                                         psk_or_pre_ms, pre_ms_len);
2881                         n = strlen(identity);
2882                         s2n(n, p);
2883                         memcpy(p, identity, n);
2884                         n+=2;
2885                         psk_err = 0;
2886                 psk_err:
2887                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2888                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2889                         if (psk_err != 0)
2890                                 {
2891                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2892                                 goto err;
2893                                 }
2894                         }
2895 #endif
2896                 else
2897                         {
2898                         ssl3_send_alert(s, SSL3_AL_FATAL,
2899                             SSL_AD_HANDSHAKE_FAILURE);
2900                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2901                             ERR_R_INTERNAL_ERROR);
2902                         goto err;
2903                         }
2904
2905                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2906                 l2n3(n,d);
2907
2908                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2909                 /* number of bytes to write */
2910                 s->init_num=n+4;
2911                 s->init_off=0;
2912                 }
2913
2914         /* SSL3_ST_CW_KEY_EXCH_B */
2915         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2916 err:
2917 #ifndef OPENSSL_NO_ECDH
2918         BN_CTX_free(bn_ctx);
2919         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2920         if (clnt_ecdh != NULL)
2921                 EC_KEY_free(clnt_ecdh);
2922         EVP_PKEY_free(srvr_pub_pkey);
2923 #endif
2924         return(-1);
2925         }
2926
2927 int ssl3_send_client_verify(SSL *s)
2928         {
2929         unsigned char *p,*d;
2930         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2931         EVP_PKEY *pkey;
2932         EVP_PKEY_CTX *pctx=NULL;
2933         EVP_MD_CTX mctx;
2934         unsigned u=0;
2935         unsigned long n;
2936         int j;
2937
2938         EVP_MD_CTX_init(&mctx);
2939
2940         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2941                 {
2942                 d=(unsigned char *)s->init_buf->data;
2943                 p= &(d[4]);
2944                 pkey=s->cert->key->privatekey;
2945 /* Create context from key and test if sha1 is allowed as digest */
2946                 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2947                 EVP_PKEY_sign_init(pctx);
2948                 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2949                         {
2950                         if (TLS1_get_version(s) < TLS1_2_VERSION)
2951                                 s->method->ssl3_enc->cert_verify_mac(s,
2952                                                 NID_sha1,
2953                                                 &(data[MD5_DIGEST_LENGTH]));
2954                         }
2955                 else
2956                         {
2957                         ERR_clear_error();
2958                         }
2959                 /* For TLS v1.2 send signature algorithm and signature
2960                  * using agreed digest and cached handshake records.
2961                  */
2962                 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2963                         {
2964                         long hdatalen = 0;
2965                         void *hdata;
2966                         const EVP_MD *md = s->cert->key->digest;
2967                         hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2968                                                                 &hdata);
2969                         if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
2970                                 {
2971                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2972                                                 ERR_R_INTERNAL_ERROR);
2973                                 goto err;
2974                                 }
2975                         p += 2;
2976 #ifdef SSL_DEBUG
2977                         fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2978                                                         EVP_MD_name(md));
2979 #endif
2980                         if (!EVP_SignInit_ex(&mctx, md, NULL)
2981                                 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2982                                 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
2983                                 {
2984                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2985                                                 ERR_R_EVP_LIB);
2986                                 goto err;
2987                                 }
2988                         s2n(u,p);
2989                         n = u + 4;
2990                         if (!ssl3_digest_cached_records(s))
2991                                 goto err;
2992                         }
2993                 else
2994 #ifndef OPENSSL_NO_RSA
2995                 if (pkey->type == EVP_PKEY_RSA)
2996                         {
2997                         s->method->ssl3_enc->cert_verify_mac(s,
2998                                 NID_md5,
2999                                 &(data[0]));
3000                         if (RSA_sign(NID_md5_sha1, data,
3001                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3002                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3003                                 {
3004                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3005                                 goto err;
3006                                 }
3007                         s2n(u,p);
3008                         n=u+2;
3009                         }
3010                 else
3011 #endif
3012 #ifndef OPENSSL_NO_DSA
3013                         if (pkey->type == EVP_PKEY_DSA)
3014                         {
3015                         if (!DSA_sign(pkey->save_type,
3016                                 &(data[MD5_DIGEST_LENGTH]),
3017                                 SHA_DIGEST_LENGTH,&(p[2]),
3018                                 (unsigned int *)&j,pkey->pkey.dsa))
3019                                 {
3020                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3021                                 goto err;
3022                                 }
3023                         s2n(j,p);
3024                         n=j+2;
3025                         }
3026                 else
3027 #endif
3028 #ifndef OPENSSL_NO_ECDSA
3029                         if (pkey->type == EVP_PKEY_EC)
3030                         {
3031                         if (!ECDSA_sign(pkey->save_type,
3032                                 &(data[MD5_DIGEST_LENGTH]),
3033                                 SHA_DIGEST_LENGTH,&(p[2]),
3034                                 (unsigned int *)&j,pkey->pkey.ec))
3035                                 {
3036                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3037                                     ERR_R_ECDSA_LIB);
3038                                 goto err;
3039                                 }
3040                         s2n(j,p);
3041                         n=j+2;
3042                         }
3043                 else
3044 #endif
3045                 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3046                 {
3047                 unsigned char signbuf[64];
3048                 int i;
3049                 size_t sigsize=64;
3050                 s->method->ssl3_enc->cert_verify_mac(s,
3051                         NID_id_GostR3411_94,
3052                         data);
3053                 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3054                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3055                         ERR_R_INTERNAL_ERROR);
3056                         goto err;
3057                 }
3058                 for (i=63,j=0; i>=0; j++, i--) {
3059                         p[2+j]=signbuf[i];
3060                 }
3061                 s2n(j,p);
3062                 n=j+2;
3063                 }
3064                 else
3065                 {
3066                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3067                         goto err;
3068                 }
3069                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3070                 l2n3(n,d);
3071
3072                 s->state=SSL3_ST_CW_CERT_VRFY_B;
3073                 s->init_num=(int)n+4;
3074                 s->init_off=0;
3075                 }
3076         EVP_MD_CTX_cleanup(&mctx);
3077         EVP_PKEY_CTX_free(pctx);
3078         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3079 err:
3080         EVP_MD_CTX_cleanup(&mctx);
3081         EVP_PKEY_CTX_free(pctx);
3082         return(-1);
3083         }
3084
3085 int ssl3_send_client_certificate(SSL *s)
3086         {
3087         X509 *x509=NULL;
3088         EVP_PKEY *pkey=NULL;
3089         int i;
3090         unsigned long l;
3091
3092         if (s->state == SSL3_ST_CW_CERT_A)
3093                 {
3094                 if ((s->cert == NULL) ||
3095                         (s->cert->key->x509 == NULL) ||
3096                         (s->cert->key->privatekey == NULL))
3097                         s->state=SSL3_ST_CW_CERT_B;
3098                 else
3099                         s->state=SSL3_ST_CW_CERT_C;
3100                 }
3101
3102         /* We need to get a client cert */
3103         if (s->state == SSL3_ST_CW_CERT_B)
3104                 {
3105                 /* If we get an error, we need to
3106                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3107                  * We then get retied later */
3108                 i=0;
3109                 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3110                 if (i < 0)
3111                         {
3112                         s->rwstate=SSL_X509_LOOKUP;
3113                         return(-1);
3114                         }
3115                 s->rwstate=SSL_NOTHING;
3116                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3117                         {
3118                         s->state=SSL3_ST_CW_CERT_B;
3119                         if (    !SSL_use_certificate(s,x509) ||
3120                                 !SSL_use_PrivateKey(s,pkey))
3121                                 i=0;
3122                         }
3123                 else if (i == 1)
3124                         {
3125                         i=0;
3126                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3127                         }
3128
3129                 if (x509 != NULL) X509_free(x509);
3130                 if (pkey != NULL) EVP_PKEY_free(pkey);
3131                 if (i == 0)
3132                         {
3133                         if (s->version == SSL3_VERSION)
3134                                 {
3135                                 s->s3->tmp.cert_req=0;
3136                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3137                                 return(1);
3138                                 }
3139                         else
3140                                 {
3141                                 s->s3->tmp.cert_req=2;
3142                                 }
3143                         }
3144
3145                 /* Ok, we have a cert */
3146                 s->state=SSL3_ST_CW_CERT_C;
3147                 }
3148
3149         if (s->state == SSL3_ST_CW_CERT_C)
3150                 {
3151                 s->state=SSL3_ST_CW_CERT_D;
3152                 l=ssl3_output_cert_chain(s,
3153                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3154                 s->init_num=(int)l;
3155                 s->init_off=0;
3156                 }
3157         /* SSL3_ST_CW_CERT_D */
3158         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3159         }
3160
3161 #define has_bits(i,m)   (((i)&(m)) == (m))
3162
3163 int ssl3_check_cert_and_algorithm(SSL *s)
3164         {
3165         int i,idx;
3166         long alg_k,alg_a;
3167         EVP_PKEY *pkey=NULL;
3168         SESS_CERT *sc;
3169 #ifndef OPENSSL_NO_RSA
3170         RSA *rsa;
3171 #endif
3172 #ifndef OPENSSL_NO_DH
3173         DH *dh;
3174 #endif
3175
3176         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3177         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3178
3179         /* we don't have a certificate */
3180         if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3181                 return(1);
3182
3183         sc=s->session->sess_cert;
3184         if (sc == NULL)
3185                 {
3186                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3187                 goto err;
3188                 }
3189
3190 #ifndef OPENSSL_NO_RSA
3191         rsa=s->session->sess_cert->peer_rsa_tmp;
3192 #endif
3193 #ifndef OPENSSL_NO_DH
3194         dh=s->session->sess_cert->peer_dh_tmp;
3195 #endif
3196
3197         /* This is the passed certificate */
3198
3199         idx=sc->peer_cert_type;
3200 #ifndef OPENSSL_NO_ECDH
3201         if (idx == SSL_PKEY_ECC)
3202                 {
3203                 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3204                                                                 s) == 0)
3205                         { /* check failed */
3206                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3207                         goto f_err;
3208                         }
3209                 else
3210                         {
3211                         return 1;
3212                         }
3213                 }
3214 #endif
3215         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3216         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3217         EVP_PKEY_free(pkey);
3218
3219
3220         /* Check that we have a certificate if we require one */
3221         if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3222                 {
3223                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3224                 goto f_err;
3225                 }
3226 #ifndef OPENSSL_NO_DSA
3227         else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3228                 {
3229                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3230                 goto f_err;
3231                 }
3232 #endif
3233 #ifndef OPENSSL_NO_RSA
3234         if ((alg_k & SSL_kRSA) &&
3235                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3236                 {
3237                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3238                 goto f_err;
3239                 }
3240 #endif
3241 #ifndef OPENSSL_NO_DH
3242         if ((alg_k & SSL_kEDH) &&
3243                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3244                 {
3245                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3246                 goto f_err;
3247                 }
3248         else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3249                 {
3250                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3251                 goto f_err;
3252                 }
3253 #ifndef OPENSSL_NO_DSA
3254         else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3255                 {
3256                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3257                 goto f_err;
3258                 }
3259 #endif
3260 #endif
3261
3262         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3263                 {
3264 #ifndef OPENSSL_NO_RSA
3265                 if (alg_k & SSL_kRSA)
3266                         {
3267                         if (rsa == NULL
3268                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3269                                 {
3270                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3271                                 goto f_err;
3272                                 }
3273                         }
3274                 else
3275 #endif
3276 #ifndef OPENSSL_NO_DH
3277                         if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3278                             {
3279                             if (dh == NULL
3280                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3281                                 {
3282                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3283                                 goto f_err;
3284                                 }
3285                         }
3286                 else
3287 #endif
3288                         {
3289                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3290                         goto f_err;
3291                         }
3292                 }
3293         return(1);
3294 f_err:
3295         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3296 err:
3297         return(0);
3298         }
3299
3300 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3301 int ssl3_send_next_proto(SSL *s)
3302         {
3303         unsigned int len, padding_len;
3304         unsigned char *d;
3305
3306         if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3307                 {
3308                 len = s->next_proto_negotiated_len;
3309                 padding_len = 32 - ((len + 2) % 32);
3310                 d = (unsigned char *)s->init_buf->data;
3311                 d[4] = len;
3312                 memcpy(d + 5, s->next_proto_negotiated, len);
3313                 d[5 + len] = padding_len;
3314                 memset(d + 6 + len, 0, padding_len);
3315                 *(d++)=SSL3_MT_NEXT_PROTO;
3316                 l2n3(2 + len + padding_len, d);
3317                 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3318                 s->init_num = 4 + 2 + len + padding_len;
3319                 s->init_off = 0;
3320                 }
3321
3322         return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3323 }
3324 #endif  /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3325
3326 /* Check to see if handshake is full or resumed. Usually this is just a
3327  * case of checking to see if a cache hit has occurred. In the case of
3328  * session tickets we have to check the next message to be sure.
3329  */
3330
3331 #ifndef OPENSSL_NO_TLSEXT
3332 int ssl3_check_finished(SSL *s)
3333         {
3334         int ok;
3335         long n;
3336         /* If we have no ticket it cannot be a resumed session. */
3337         if (!s->session->tlsext_tick)
3338                 return 1;
3339         /* this function is called when we really expect a Certificate
3340          * message, so permit appropriate message length */
3341         n=s->method->ssl_get_message(s,
3342                 SSL3_ST_CR_CERT_A,
3343                 SSL3_ST_CR_CERT_B,
3344                 -1,
3345                 s->max_cert_list,
3346                 &ok);
3347         if (!ok) return((int)n);
3348         s->s3->tmp.reuse_message = 1;
3349         if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3350                 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3351                 return 2;
3352
3353         return 1;
3354         }
3355 #endif
3356
3357 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3358         {
3359         int i = 0;
3360 #ifndef OPENSSL_NO_ENGINE
3361         if (s->ctx->client_cert_engine)
3362                 {
3363                 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3364                                                 SSL_get_client_CA_list(s),
3365                                                 px509, ppkey, NULL, NULL, NULL);
3366                 if (i != 0)
3367                         return i;
3368                 }
3369 #endif
3370         if (s->ctx->client_cert_cb)
3371                 i = s->ctx->client_cert_cb(s,px509,ppkey);
3372         return i;
3373         }