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                         s->s3->flags |= SSL3_FLAGS_CCS_OK;
 563                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 564                                 SSL3_ST_CR_FINISHED_B);
 565                         if (ret <= 0) goto end;
 566
 567                         if (s->hit)
 568                                 s->state=SSL3_ST_CW_CHANGE_A;
 569                         else
 570                                 s->state=SSL_ST_OK;
 571                         s->init_num=0;
 572                         break;
 573
 574                 case SSL3_ST_CW_FLUSH:
 575                         s->rwstate=SSL_WRITING;
 576                         if (BIO_flush(s->wbio) <= 0)
 577                                 {
 578                                 ret= -1;
 579                                 goto end;
 580                                 }
 581                         s->rwstate=SSL_NOTHING;
 582                         s->state=s->s3->tmp.next_state;
 583                         break;
 584
 585                 case SSL_ST_OK:
 586                         /* clean a few things up */
 587                         ssl3_cleanup_key_block(s);
 588
 589                         if (s->init_buf != NULL)
 590                                 {
 591                                 BUF_MEM_free(s->init_buf);
 592                                 s->init_buf=NULL;
 593                                 }
 594
 595                         /* If we are not 'joining' the last two packets,
 596                          * remove the buffering now */
 597                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 598                                 ssl_free_wbio_buffer(s);
 599                         /* else do it later in ssl3_write */
 600
 601                         s->init_num=0;
 602                         s->renegotiate=0;
 603                         s->new_session=0;
 604
 605                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 606                         if (s->hit) s->ctx->stats.sess_hit++;
 607
 608                         ret=1;
 609                         /* s->server=0; */
 610                         s->handshake_func=ssl3_connect;
 611                         s->ctx->stats.sess_connect_good++;
 612
 613                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 614
 615                         goto end;
 616                         /* break; */
 617
 618                 default:
 619                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 620                         ret= -1;
 621                         goto end;
 622                         /* break; */
 623                         }
 624
 625                 /* did we do anything */
 626                 if (!s->s3->tmp.reuse_message && !skip)
 627                         {
 628                         if (s->debug)
 629                                 {
 630                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 631                                         goto end;
 632                                 }
 633
 634                         if ((cb != NULL) && (s->state != state))
 635                                 {
 636                                 new_state=s->state;
 637                                 s->state=state;
 638                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 639                                 s->state=new_state;
 640                                 }
 641                         }
 642                 skip=0;
 643                 }
 644 end:
 645         s->in_handshake--;
 646         if (buf != NULL)
 647                 BUF_MEM_free(buf);
 648         if (cb != NULL)
 649                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 650         return(ret);
 651         }
 652
 653
 654 int ssl3_client_hello(SSL *s)
 655         {
 656         unsigned char *buf;
 657         unsigned char *p,*d;
 658         int i;
 659         unsigned long l;
 660 #ifndef OPENSSL_NO_COMP
 661         int j;
 662         SSL_COMP *comp;
 663 #endif
 664
 665         buf=(unsigned char *)s->init_buf->data;
 666         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 667                 {
 668                 SSL_SESSION *sess = s->session;
 669                 if ((sess == NULL) ||
 670                         (sess->ssl_version != s->version) ||
 671 #ifdef OPENSSL_NO_TLSEXT
 672                         !sess->session_id_length ||
 673 #else
 674                         (!sess->session_id_length && !sess->tlsext_tick) ||
 675 #endif
 676                         (sess->not_resumable))
 677                         {
 678                         if (!ssl_get_new_session(s,0))
 679                                 goto err;
 680                         }
 681                 /* else use the pre-loaded session */
 682
 683                 p=s->s3->client_random;
 684
 685                 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 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->s3->flags |= SSL3_FLAGS_CCS_OK;
 920             s->hit=1;
 921             }
 922         else    /* a miss or crap from the other end */
 923                 {
 924                 /* If we were trying for session-id reuse, make a new
 925                  * SSL_SESSION so we don't stuff up other people */
 926                 s->hit=0;
 927                 if (s->session->session_id_length > 0)
 928                         {
 929                         if (!ssl_get_new_session(s,0))
 930                                 {
 931                                 al=SSL_AD_INTERNAL_ERROR;
 932                                 goto f_err;
 933                                 }
 934                         }
 935                 s->session->session_id_length=j;
 936                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 937                 }
 938         p+=j;
 939         c=ssl_get_cipher_by_char(s,p);
 940         if (c == NULL)
 941                 {
 942                 /* unknown cipher */
 943                 al=SSL_AD_ILLEGAL_PARAMETER;
 944                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 945                 goto f_err;
 946                 }
 947         /* TLS v1.2 only ciphersuites require v1.2 or later */
 948         if ((c->algorithm_ssl & SSL_TLSV1_2) &&
 949                 (TLS1_get_version(s) < TLS1_2_VERSION))
 950                 {
 951                 al=SSL_AD_ILLEGAL_PARAMETER;
 952                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 953                 goto f_err;
 954                 }
 955         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 956
 957         sk=ssl_get_ciphers_by_id(s);
 958         i=sk_SSL_CIPHER_find(sk,c);
 959         if (i < 0)
 960                 {
 961                 /* we did not say we would use this cipher */
 962                 al=SSL_AD_ILLEGAL_PARAMETER;
 963                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 964                 goto f_err;
 965                 }
 966
 967         /* Depending on the session caching (internal/external), the cipher
 968            and/or cipher_id values may not be set. Make sure that
 969            cipher_id is set and use it for comparison. */
 970         if (s->session->cipher)
 971                 s->session->cipher_id = s->session->cipher->id;
 972         if (s->hit && (s->session->cipher_id != c->id))
 973                 {
 974 /* Workaround is now obsolete */
 975 #if 0
 976                 if (!(s->options &
 977                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 978 #endif
 979                         {
 980                         al=SSL_AD_ILLEGAL_PARAMETER;
 981                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 982                         goto f_err;
 983                         }
 984                 }
 985         s->s3->tmp.new_cipher=c;
 986         /* Don't digest cached records if TLS v1.2: we may need them for
 987          * client authentication.
 988          */
 989         if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
 990                 {
 991                 al = SSL_AD_INTERNAL_ERROR;
 992                 goto f_err;
 993                 }
 994         /* lets get the compression algorithm */
 995         /* COMPRESSION */
 996 #ifdef OPENSSL_NO_COMP
 997         if (*(p++) != 0)
 998                 {
 999                 al=SSL_AD_ILLEGAL_PARAMETER;
1000                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1001                 goto f_err;
1002                 }
1003         /* If compression is disabled we'd better not try to resume a session
1004          * using compression.
1005          */
1006         if (s->session->compress_meth != 0)
1007                 {
1008                 al=SSL_AD_INTERNAL_ERROR;
1009                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1010                 goto f_err;
1011                 }
1012 #else
1013         j= *(p++);
1014         if (s->hit && j != s->session->compress_meth)
1015                 {
1016                 al=SSL_AD_ILLEGAL_PARAMETER;
1017                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1018                 goto f_err;
1019                 }
1020         if (j == 0)
1021                 comp=NULL;
1022         else if (s->options & SSL_OP_NO_COMPRESSION)
1023                 {
1024                 al=SSL_AD_ILLEGAL_PARAMETER;
1025                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1026                 goto f_err;
1027                 }
1028         else
1029                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1030
1031         if ((j != 0) && (comp == NULL))
1032                 {
1033                 al=SSL_AD_ILLEGAL_PARAMETER;
1034                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1035                 goto f_err;
1036                 }
1037         else
1038                 {
1039                 s->s3->tmp.new_compression=comp;
1040                 }
1041 #endif
1042
1043 #ifndef OPENSSL_NO_TLSEXT
1044         /* TLS extensions*/
1045         if (s->version >= SSL3_VERSION)
1046                 {
1047                 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1048                         {
1049                         /* 'al' set by ssl_parse_serverhello_tlsext */
1050                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1051                         goto f_err;
1052                         }
1053                 if (ssl_check_serverhello_tlsext(s) <= 0)
1054                         {
1055                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1056                                 goto err;
1057                         }
1058                 }
1059 #endif
1060
1061         if (p != (d+n))
1062                 {
1063                 /* wrong packet length */
1064                 al=SSL_AD_DECODE_ERROR;
1065                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1066                 goto f_err;
1067                 }
1068
1069         return(1);
1070 f_err:
1071         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1072 err:
1073         return(-1);
1074         }
1075
1076 int ssl3_get_server_certificate(SSL *s)
1077         {
1078         int al,i,ok,ret= -1;
1079         unsigned long n,nc,llen,l;
1080         X509 *x=NULL;
1081         const unsigned char *q,*p;
1082         unsigned char *d;
1083         STACK_OF(X509) *sk=NULL;
1084         SESS_CERT *sc;
1085         EVP_PKEY *pkey=NULL;
1086         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1087
1088         n=s->method->ssl_get_message(s,
1089                 SSL3_ST_CR_CERT_A,
1090                 SSL3_ST_CR_CERT_B,
1091                 -1,
1092                 s->max_cert_list,
1093                 &ok);
1094
1095         if (!ok) return((int)n);
1096
1097         if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1098                 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1099                 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1100                 {
1101                 s->s3->tmp.reuse_message=1;
1102                 return(1);
1103                 }
1104
1105         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1106                 {
1107                 al=SSL_AD_UNEXPECTED_MESSAGE;
1108                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1109                 goto f_err;
1110                 }
1111         p=d=(unsigned char *)s->init_msg;
1112
1113         if ((sk=sk_X509_new_null()) == NULL)
1114                 {
1115                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1116                 goto err;
1117                 }
1118
1119         n2l3(p,llen);
1120         if (llen+3 != n)
1121                 {
1122                 al=SSL_AD_DECODE_ERROR;
1123                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1124                 goto f_err;
1125                 }
1126         for (nc=0; nc<llen; )
1127                 {
1128                 n2l3(p,l);
1129                 if ((l+nc+3) > llen)
1130                         {
1131                         al=SSL_AD_DECODE_ERROR;
1132                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1133                         goto f_err;
1134                         }
1135
1136                 q=p;
1137                 x=d2i_X509(NULL,&q,l);
1138                 if (x == NULL)
1139                         {
1140                         al=SSL_AD_BAD_CERTIFICATE;
1141                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1142                         goto f_err;
1143                         }
1144                 if (q != (p+l))
1145                         {
1146                         al=SSL_AD_DECODE_ERROR;
1147                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1148                         goto f_err;
1149                         }
1150                 if (!sk_X509_push(sk,x))
1151                         {
1152                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1153                         goto err;
1154                         }
1155                 x=NULL;
1156                 nc+=l+3;
1157                 p=q;
1158                 }
1159
1160         i=ssl_verify_cert_chain(s,sk);
1161         if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1162 #ifndef OPENSSL_NO_KRB5
1163             && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1164                  (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1165 #endif /* OPENSSL_NO_KRB5 */
1166                 )
1167                 {
1168                 al=ssl_verify_alarm_type(s->verify_result);
1169                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1170                 goto f_err;
1171                 }
1172         ERR_clear_error(); /* but we keep s->verify_result */
1173
1174         sc=ssl_sess_cert_new();
1175         if (sc == NULL) goto err;
1176
1177         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1178         s->session->sess_cert=sc;
1179
1180         sc->cert_chain=sk;
1181         /* Inconsistency alert: cert_chain does include the peer's
1182          * certificate, which we don't include in s3_srvr.c */
1183         x=sk_X509_value(sk,0);
1184         sk=NULL;
1185         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1186
1187         pkey=X509_get_pubkey(x);
1188
1189         /* VRS: allow null cert if auth == KRB5 */
1190         need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1191                     (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1192                     ? 0 : 1;
1193
1194 #ifdef KSSL_DEBUG
1195         printf("pkey,x = %p, %p\n", pkey,x);
1196         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1197         printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1198                 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1199 #endif    /* KSSL_DEBUG */
1200
1201         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1202                 {
1203                 x=NULL;
1204                 al=SSL3_AL_FATAL;
1205                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1206                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1207                 goto f_err;
1208                 }
1209
1210         i=ssl_cert_type(x,pkey);
1211         if (need_cert && i < 0)
1212                 {
1213                 x=NULL;
1214                 al=SSL3_AL_FATAL;
1215                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1216                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1217                 goto f_err;
1218                 }
1219
1220         if (need_cert)
1221                 {
1222                 sc->peer_cert_type=i;
1223                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1224                 /* Why would the following ever happen?
1225                  * We just created sc a couple of lines ago. */
1226                 if (sc->peer_pkeys[i].x509 != NULL)
1227                         X509_free(sc->peer_pkeys[i].x509);
1228                 sc->peer_pkeys[i].x509=x;
1229                 sc->peer_key= &(sc->peer_pkeys[i]);
1230
1231                 if (s->session->peer != NULL)
1232                         X509_free(s->session->peer);
1233                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1234                 s->session->peer=x;
1235                 }
1236         else
1237                 {
1238                 sc->peer_cert_type=i;
1239                 sc->peer_key= NULL;
1240
1241                 if (s->session->peer != NULL)
1242                         X509_free(s->session->peer);
1243                 s->session->peer=NULL;
1244                 }
1245         s->session->verify_result = s->verify_result;
1246
1247         x=NULL;
1248         ret=1;
1249
1250         if (0)
1251                 {
1252 f_err:
1253                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1254                 }
1255 err:
1256         EVP_PKEY_free(pkey);
1257         X509_free(x);
1258         sk_X509_pop_free(sk,X509_free);
1259         return(ret);
1260         }
1261
1262 int ssl3_get_key_exchange(SSL *s)
1263         {
1264 #ifndef OPENSSL_NO_RSA
1265         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1266 #endif
1267         EVP_MD_CTX md_ctx;
1268         unsigned char *param,*p;
1269         int al,i,j,param_len,ok;
1270         long n,alg_k,alg_a;
1271         EVP_PKEY *pkey=NULL;
1272         const EVP_MD *md = NULL;
1273 #ifndef OPENSSL_NO_RSA
1274         RSA *rsa=NULL;
1275 #endif
1276 #ifndef OPENSSL_NO_DH
1277         DH *dh=NULL;
1278 #endif
1279 #ifndef OPENSSL_NO_ECDH
1280         EC_KEY *ecdh = NULL;
1281         BN_CTX *bn_ctx = NULL;
1282         EC_POINT *srvr_ecpoint = NULL;
1283         int curve_nid = 0;
1284         int encoded_pt_len = 0;
1285 #endif
1286
1287         /* use same message size as in ssl3_get_certificate_request()
1288          * as ServerKeyExchange message may be skipped */
1289         n=s->method->ssl_get_message(s,
1290                 SSL3_ST_CR_KEY_EXCH_A,
1291                 SSL3_ST_CR_KEY_EXCH_B,
1292                 -1,
1293                 s->max_cert_list,
1294                 &ok);
1295         if (!ok) return((int)n);
1296
1297         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1298                 {
1299 #ifndef OPENSSL_NO_PSK
1300                 /* In plain PSK ciphersuite, ServerKeyExchange can be
1301                    omitted if no identity hint is sent. Set
1302                    session->sess_cert anyway to avoid problems
1303                    later.*/
1304                 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1305                         {
1306                         s->session->sess_cert=ssl_sess_cert_new();
1307                         if (s->ctx->psk_identity_hint)
1308                                 OPENSSL_free(s->ctx->psk_identity_hint);
1309                         s->ctx->psk_identity_hint = NULL;
1310                         }
1311 #endif
1312                 s->s3->tmp.reuse_message=1;
1313                 return(1);
1314                 }
1315
1316         param=p=(unsigned char *)s->init_msg;
1317         if (s->session->sess_cert != NULL)
1318                 {
1319 #ifndef OPENSSL_NO_RSA
1320                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1321                         {
1322                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1323                         s->session->sess_cert->peer_rsa_tmp=NULL;
1324                         }
1325 #endif
1326 #ifndef OPENSSL_NO_DH
1327                 if (s->session->sess_cert->peer_dh_tmp)
1328                         {
1329                         DH_free(s->session->sess_cert->peer_dh_tmp);
1330                         s->session->sess_cert->peer_dh_tmp=NULL;
1331                         }
1332 #endif
1333 #ifndef OPENSSL_NO_ECDH
1334                 if (s->session->sess_cert->peer_ecdh_tmp)
1335                         {
1336                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1337                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1338                         }
1339 #endif
1340                 }
1341         else
1342                 {
1343                 s->session->sess_cert=ssl_sess_cert_new();
1344                 }
1345
1346         param_len=0;
1347         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1348         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1349         EVP_MD_CTX_init(&md_ctx);
1350
1351 #ifndef OPENSSL_NO_PSK
1352         if (alg_k & SSL_kPSK)
1353                 {
1354                 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1355
1356                 al=SSL_AD_HANDSHAKE_FAILURE;
1357                 n2s(p,i);
1358                 param_len=i+2;
1359                 /* Store PSK identity hint for later use, hint is used
1360                  * in ssl3_send_client_key_exchange.  Assume that the
1361                  * maximum length of a PSK identity hint can be as
1362                  * long as the maximum length of a PSK identity. */
1363                 if (i > PSK_MAX_IDENTITY_LEN)
1364                         {
1365                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1366                                 SSL_R_DATA_LENGTH_TOO_LONG);
1367                         goto f_err;
1368                         }
1369                 if (param_len > n)
1370                         {
1371                         al=SSL_AD_DECODE_ERROR;
1372                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1373                                 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1374                         goto f_err;
1375                         }
1376                 /* If received PSK identity hint contains NULL
1377                  * characters, the hint is truncated from the first
1378                  * NULL. p may not be ending with NULL, so create a
1379                  * NULL-terminated string. */
1380                 memcpy(tmp_id_hint, p, i);
1381                 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1382                 if (s->ctx->psk_identity_hint != NULL)
1383                         OPENSSL_free(s->ctx->psk_identity_hint);
1384                 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1385                 if (s->ctx->psk_identity_hint == NULL)
1386                         {
1387                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1388                         goto f_err;
1389                         }
1390
1391                 p+=i;
1392                 n-=param_len;
1393                 }
1394         else
1395 #endif /* !OPENSSL_NO_PSK */
1396 #ifndef OPENSSL_NO_SRP
1397         if (alg_k & SSL_kSRP)
1398                 {
1399                 n2s(p,i);
1400                 param_len=i+2;
1401                 if (param_len > n)
1402                         {
1403                         al=SSL_AD_DECODE_ERROR;
1404                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1405                         goto f_err;
1406                         }
1407                 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1408                         {
1409                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1410                         goto err;
1411                         }
1412                 p+=i;
1413
1414                 n2s(p,i);
1415                 param_len+=i+2;
1416                 if (param_len > n)
1417                         {
1418                         al=SSL_AD_DECODE_ERROR;
1419                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1420                         goto f_err;
1421                         }
1422                 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1423                         {
1424                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1425                         goto err;
1426                         }
1427                 p+=i;
1428
1429                 i = (unsigned int)(p[0]);
1430                 p++;
1431                 param_len+=i+1;
1432                 if (param_len > n)
1433                         {
1434                         al=SSL_AD_DECODE_ERROR;
1435                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1436                         goto f_err;
1437                         }
1438                 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1439                         {
1440                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1441                         goto err;
1442                         }
1443                 p+=i;
1444
1445                 n2s(p,i);
1446                 param_len+=i+2;
1447                 if (param_len > n)
1448                         {
1449                         al=SSL_AD_DECODE_ERROR;
1450                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1451                         goto f_err;
1452                         }
1453                 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1454                         {
1455                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1456                         goto err;
1457                         }
1458                 p+=i;
1459                 n-=param_len;
1460
1461 /* We must check if there is a certificate */
1462 #ifndef OPENSSL_NO_RSA
1463                 if (alg_a & SSL_aRSA)
1464                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1465 #else
1466                 if (0)
1467                         ;
1468 #endif
1469 #ifndef OPENSSL_NO_DSA
1470                 else if (alg_a & SSL_aDSS)
1471                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1472 #endif
1473                 }
1474         else
1475 #endif /* !OPENSSL_NO_SRP */
1476 #ifndef OPENSSL_NO_RSA
1477         if (alg_k & SSL_kRSA)
1478                 {
1479                 if ((rsa=RSA_new()) == NULL)
1480                         {
1481                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1482                         goto err;
1483                         }
1484                 n2s(p,i);
1485                 param_len=i+2;
1486                 if (param_len > n)
1487                         {
1488                         al=SSL_AD_DECODE_ERROR;
1489                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1490                         goto f_err;
1491                         }
1492                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1493                         {
1494                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1495                         goto err;
1496                         }
1497                 p+=i;
1498
1499                 n2s(p,i);
1500                 param_len+=i+2;
1501                 if (param_len > n)
1502                         {
1503                         al=SSL_AD_DECODE_ERROR;
1504                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1505                         goto f_err;
1506                         }
1507                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1508                         {
1509                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1510                         goto err;
1511                         }
1512                 p+=i;
1513                 n-=param_len;
1514
1515                 /* this should be because we are using an export cipher */
1516                 if (alg_a & SSL_aRSA)
1517                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1518                 else
1519                         {
1520                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1521                         goto err;
1522                         }
1523                 s->session->sess_cert->peer_rsa_tmp=rsa;
1524                 rsa=NULL;
1525                 }
1526 #else /* OPENSSL_NO_RSA */
1527         if (0)
1528                 ;
1529 #endif
1530 #ifndef OPENSSL_NO_DH
1531         else if (alg_k & SSL_kEDH)
1532                 {
1533                 if ((dh=DH_new()) == NULL)
1534                         {
1535                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1536                         goto err;
1537                         }
1538                 n2s(p,i);
1539                 param_len=i+2;
1540                 if (param_len > n)
1541                         {
1542                         al=SSL_AD_DECODE_ERROR;
1543                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1544                         goto f_err;
1545                         }
1546                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1547                         {
1548                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1549                         goto err;
1550                         }
1551                 p+=i;
1552
1553                 n2s(p,i);
1554                 param_len+=i+2;
1555                 if (param_len > n)
1556                         {
1557                         al=SSL_AD_DECODE_ERROR;
1558                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1559                         goto f_err;
1560                         }
1561                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1562                         {
1563                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1564                         goto err;
1565                         }
1566                 p+=i;
1567
1568                 n2s(p,i);
1569                 param_len+=i+2;
1570                 if (param_len > n)
1571                         {
1572                         al=SSL_AD_DECODE_ERROR;
1573                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1574                         goto f_err;
1575                         }
1576                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1577                         {
1578                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1579                         goto err;
1580                         }
1581                 p+=i;
1582                 n-=param_len;
1583
1584 #ifndef OPENSSL_NO_RSA
1585                 if (alg_a & SSL_aRSA)
1586                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1587 #else
1588                 if (0)
1589                         ;
1590 #endif
1591 #ifndef OPENSSL_NO_DSA
1592                 else if (alg_a & SSL_aDSS)
1593                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1594 #endif
1595                 /* else anonymous DH, so no certificate or pkey. */
1596
1597                 s->session->sess_cert->peer_dh_tmp=dh;
1598                 dh=NULL;
1599                 }
1600         else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1601                 {
1602                 al=SSL_AD_ILLEGAL_PARAMETER;
1603                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1604                 goto f_err;
1605                 }
1606 #endif /* !OPENSSL_NO_DH */
1607
1608 #ifndef OPENSSL_NO_ECDH
1609         else if (alg_k & SSL_kEECDH)
1610                 {
1611                 EC_GROUP *ngroup;
1612                 const EC_GROUP *group;
1613
1614                 if ((ecdh=EC_KEY_new()) == NULL)
1615                         {
1616                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1617                         goto err;
1618                         }
1619
1620                 /* Extract elliptic curve parameters and the
1621                  * server's ephemeral ECDH public key.
1622                  * Keep accumulating lengths of various components in
1623                  * param_len and make sure it never exceeds n.
1624                  */
1625
1626                 /* XXX: For now we only support named (not generic) curves
1627                  * and the ECParameters in this case is just three bytes.
1628                  */
1629                 param_len=3;
1630                 if ((param_len > n) ||
1631                     (*p != NAMED_CURVE_TYPE) ||
1632                     ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1633                         {
1634                         al=SSL_AD_INTERNAL_ERROR;
1635                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1636                         goto f_err;
1637                         }
1638
1639                 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1640                 if (ngroup == NULL)
1641                         {
1642                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1643                         goto err;
1644                         }
1645                 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1646                         {
1647                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1648                         goto err;
1649                         }
1650                 EC_GROUP_free(ngroup);
1651
1652                 group = EC_KEY_get0_group(ecdh);
1653
1654                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1655                     (EC_GROUP_get_degree(group) > 163))
1656                         {
1657                         al=SSL_AD_EXPORT_RESTRICTION;
1658                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1659                         goto f_err;
1660                         }
1661
1662                 p+=3;
1663
1664                 /* Next, get the encoded ECPoint */
1665                 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1666                     ((bn_ctx = BN_CTX_new()) == NULL))
1667                         {
1668                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1669                         goto err;
1670                         }
1671
1672                 encoded_pt_len = *p;  /* length of encoded point */
1673                 p+=1;
1674                 param_len += (1 + encoded_pt_len);
1675                 if ((param_len > n) ||
1676                     (EC_POINT_oct2point(group, srvr_ecpoint,
1677                         p, encoded_pt_len, bn_ctx) == 0))
1678                         {
1679                         al=SSL_AD_DECODE_ERROR;
1680                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1681                         goto f_err;
1682                         }
1683
1684                 n-=param_len;
1685                 p+=encoded_pt_len;
1686
1687                 /* The ECC/TLS specification does not mention
1688                  * the use of DSA to sign ECParameters in the server
1689                  * key exchange message. We do support RSA and ECDSA.
1690                  */
1691                 if (0) ;
1692 #ifndef OPENSSL_NO_RSA
1693                 else if (alg_a & SSL_aRSA)
1694                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1695 #endif
1696 #ifndef OPENSSL_NO_ECDSA
1697                 else if (alg_a & SSL_aECDSA)
1698                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1699 #endif
1700                 /* else anonymous ECDH, so no certificate or pkey. */
1701                 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1702                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1703                 ecdh=NULL;
1704                 BN_CTX_free(bn_ctx);
1705                 bn_ctx = NULL;
1706                 EC_POINT_free(srvr_ecpoint);
1707                 srvr_ecpoint = NULL;
1708                 }
1709         else if (alg_k)
1710                 {
1711                 al=SSL_AD_UNEXPECTED_MESSAGE;
1712                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1713                 goto f_err;
1714                 }
1715 #endif /* !OPENSSL_NO_ECDH */
1716
1717
1718         /* p points to the next byte, there are 'n' bytes left */
1719
1720         /* if it was signed, check the signature */
1721         if (pkey != NULL)
1722                 {
1723                 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1724                         {
1725                         int sigalg = tls12_get_sigid(pkey);
1726                         /* Should never happen */
1727                         if (sigalg == -1)
1728                                 {
1729                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1730                                 goto err;
1731                                 }
1732                         /* Check key type is consistent with signature */
1733                         if (sigalg != (int)p[1])
1734                                 {
1735                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1736                                 al=SSL_AD_DECODE_ERROR;
1737                                 goto f_err;
1738                                 }
1739                         md = tls12_get_hash(p[0]);
1740                         if (md == NULL)
1741                                 {
1742                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1743                                 al=SSL_AD_DECODE_ERROR;
1744                                 goto f_err;
1745                                 }
1746 #ifdef SSL_DEBUG
1747 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1748 #endif
1749                         p += 2;
1750                         n -= 2;
1751                         }
1752                 else
1753                         md = EVP_sha1();
1754
1755                 n2s(p,i);
1756                 n-=2;
1757                 j=EVP_PKEY_size(pkey);
1758
1759                 if ((i != n) || (n > j) || (n <= 0))
1760                         {
1761                         /* wrong packet length */
1762                         al=SSL_AD_DECODE_ERROR;
1763                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1764                         goto f_err;
1765                         }
1766
1767 #ifndef OPENSSL_NO_RSA
1768                 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1769                         {
1770                         int num;
1771
1772                         j=0;
1773                         q=md_buf;
1774                         for (num=2; num > 0; num--)
1775                                 {
1776                                 EVP_MD_CTX_set_flags(&md_ctx,
1777                                         EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1778                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1779                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1780                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1781                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1782                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1783                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1784                                 q+=i;
1785                                 j+=i;
1786                                 }
1787                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1788                                                                 pkey->pkey.rsa);
1789                         if (i < 0)
1790                                 {
1791                                 al=SSL_AD_DECRYPT_ERROR;
1792                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1793                                 goto f_err;
1794                                 }
1795                         if (i == 0)
1796                                 {
1797                                 /* bad signature */
1798                                 al=SSL_AD_DECRYPT_ERROR;
1799                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1800                                 goto f_err;
1801                                 }
1802                         }
1803                 else
1804 #endif
1805                         {
1806                         EVP_VerifyInit_ex(&md_ctx, md, NULL);
1807                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1808                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1809                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1810                         if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1811                                 {
1812                                 /* bad signature */
1813                                 al=SSL_AD_DECRYPT_ERROR;
1814                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1815                                 goto f_err;
1816                                 }
1817                         }
1818                 }
1819         else
1820                 {
1821                 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1822                         /* aNULL or kPSK do not need public keys */
1823                         {
1824                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1825                         goto err;
1826                         }
1827                 /* still data left over */
1828                 if (n != 0)
1829                         {
1830                         al=SSL_AD_DECODE_ERROR;
1831                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1832                         goto f_err;
1833                         }
1834                 }
1835         EVP_PKEY_free(pkey);
1836         EVP_MD_CTX_cleanup(&md_ctx);
1837         return(1);
1838 f_err:
1839         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1840 err:
1841         EVP_PKEY_free(pkey);
1842 #ifndef OPENSSL_NO_RSA
1843         if (rsa != NULL)
1844                 RSA_free(rsa);
1845 #endif
1846 #ifndef OPENSSL_NO_DH
1847         if (dh != NULL)
1848                 DH_free(dh);
1849 #endif
1850 #ifndef OPENSSL_NO_ECDH
1851         BN_CTX_free(bn_ctx);
1852         EC_POINT_free(srvr_ecpoint);
1853         if (ecdh != NULL)
1854                 EC_KEY_free(ecdh);
1855 #endif
1856         EVP_MD_CTX_cleanup(&md_ctx);
1857         return(-1);
1858         }
1859
1860 int ssl3_get_certificate_request(SSL *s)
1861         {
1862         int ok,ret=0;
1863         unsigned long n,nc,l;
1864         unsigned int llen, ctype_num,i;
1865         X509_NAME *xn=NULL;
1866         const unsigned char *p,*q;
1867         unsigned char *d;
1868         STACK_OF(X509_NAME) *ca_sk=NULL;
1869
1870         n=s->method->ssl_get_message(s,
1871                 SSL3_ST_CR_CERT_REQ_A,
1872                 SSL3_ST_CR_CERT_REQ_B,
1873                 -1,
1874                 s->max_cert_list,
1875                 &ok);
1876
1877         if (!ok) return((int)n);
1878
1879         s->s3->tmp.cert_req=0;
1880
1881         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1882                 {
1883                 s->s3->tmp.reuse_message=1;
1884                 /* If we get here we don't need any cached handshake records
1885                  * as we wont be doing client auth.
1886                  */
1887                 if (s->s3->handshake_buffer)
1888                         {
1889                         if (!ssl3_digest_cached_records(s))
1890                                 goto err;
1891                         }
1892                 return(1);
1893                 }
1894
1895         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1896                 {
1897                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1898                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1899                 goto err;
1900                 }
1901
1902         /* TLS does not like anon-DH with client cert */
1903         if (s->version > SSL3_VERSION)
1904                 {
1905                 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1906                         {
1907                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1908                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1909                         goto err;
1910                         }
1911                 }
1912
1913         p=d=(unsigned char *)s->init_msg;
1914
1915         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1916                 {
1917                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1918                 goto err;
1919                 }
1920
1921         /* get the certificate types */
1922         ctype_num= *(p++);
1923         if (ctype_num > SSL3_CT_NUMBER)
1924                 ctype_num=SSL3_CT_NUMBER;
1925         for (i=0; i<ctype_num; i++)
1926                 s->s3->tmp.ctype[i]= p[i];
1927         p+=ctype_num;
1928         if (TLS1_get_version(s) >= TLS1_2_VERSION)
1929                 {
1930                 n2s(p, llen);
1931                 /* Check we have enough room for signature algorithms and
1932                  * following length value.
1933                  */
1934                 if ((unsigned long)(p - d + llen + 2) > n)
1935                         {
1936                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1937                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1938                         goto err;
1939                         }
1940                 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1941                         {
1942                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1943                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1944                         goto err;
1945                         }
1946                 p += llen;
1947                 }
1948
1949         /* get the CA RDNs */
1950         n2s(p,llen);
1951 #if 0
1952 {
1953 FILE *out;
1954 out=fopen("/tmp/vsign.der","w");
1955 fwrite(p,1,llen,out);
1956 fclose(out);
1957 }
1958 #endif
1959
1960         if ((unsigned long)(p - d + llen) != n)
1961                 {
1962                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1963                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1964                 goto err;
1965                 }
1966
1967         for (nc=0; nc<llen; )
1968                 {
1969                 n2s(p,l);
1970                 if ((l+nc+2) > llen)
1971                         {
1972                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1973                                 goto cont; /* netscape bugs */
1974                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1975                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1976                         goto err;
1977                         }
1978
1979                 q=p;
1980
1981                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1982                         {
1983                         /* If netscape tolerance is on, ignore errors */
1984                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1985                                 goto cont;
1986                         else
1987                                 {
1988                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1989                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1990                                 goto err;
1991                                 }
1992                         }
1993
1994                 if (q != (p+l))
1995                         {
1996                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1997                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1998                         goto err;
1999                         }
2000                 if (!sk_X509_NAME_push(ca_sk,xn))
2001                         {
2002                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2003                         goto err;
2004                         }
2005
2006                 p+=l;
2007                 nc+=l+2;
2008                 }
2009
2010         if (0)
2011                 {
2012 cont:
2013                 ERR_clear_error();
2014                 }
2015
2016         /* we should setup a certificate to return.... */
2017         s->s3->tmp.cert_req=1;
2018         s->s3->tmp.ctype_num=ctype_num;
2019         if (s->s3->tmp.ca_names != NULL)
2020                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2021         s->s3->tmp.ca_names=ca_sk;
2022         ca_sk=NULL;
2023
2024         ret=1;
2025 err:
2026         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2027         return(ret);
2028         }
2029
2030 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2031         {
2032         return(X509_NAME_cmp(*a,*b));
2033         }
2034 #ifndef OPENSSL_NO_TLSEXT
2035 int ssl3_get_new_session_ticket(SSL *s)
2036         {
2037         int ok,al,ret=0, ticklen;
2038         long n;
2039         const unsigned char *p;
2040         unsigned char *d;
2041
2042         n=s->method->ssl_get_message(s,
2043                 SSL3_ST_CR_SESSION_TICKET_A,
2044                 SSL3_ST_CR_SESSION_TICKET_B,
2045                 -1,
2046                 16384,
2047                 &ok);
2048
2049         if (!ok)
2050                 return((int)n);
2051
2052         if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2053                 {
2054                 s->s3->tmp.reuse_message=1;
2055                 return(1);
2056                 }
2057         if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2058                 {
2059                 al=SSL_AD_UNEXPECTED_MESSAGE;
2060                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2061                 goto f_err;
2062                 }
2063         if (n < 6)
2064                 {
2065                 /* need at least ticket_lifetime_hint + ticket length */
2066                 al = SSL_AD_DECODE_ERROR;
2067                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2068                 goto f_err;
2069                 }
2070
2071         p=d=(unsigned char *)s->init_msg;
2072         n2l(p, s->session->tlsext_tick_lifetime_hint);
2073         n2s(p, ticklen);
2074         /* ticket_lifetime_hint + ticket_length + ticket */
2075         if (ticklen + 6 != n)
2076                 {
2077                 al = SSL_AD_DECODE_ERROR;
2078                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2079                 goto f_err;
2080                 }
2081         if (s->session->tlsext_tick)
2082                 {
2083                 OPENSSL_free(s->session->tlsext_tick);
2084                 s->session->tlsext_ticklen = 0;
2085                 }
2086         s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2087         if (!s->session->tlsext_tick)
2088                 {
2089                 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2090                 goto err;
2091                 }
2092         memcpy(s->session->tlsext_tick, p, ticklen);
2093         s->session->tlsext_ticklen = ticklen;
2094         /* There are two ways to detect a resumed ticket sesion.
2095          * One is to set an appropriate session ID and then the server
2096          * must return a match in ServerHello. This allows the normal
2097          * client session ID matching to work and we know much
2098          * earlier that the ticket has been accepted.
2099          *
2100          * The other way is to set zero length session ID when the
2101          * ticket is presented and rely on the handshake to determine
2102          * session resumption.
2103          *
2104          * We choose the former approach because this fits in with
2105          * assumptions elsewhere in OpenSSL. The session ID is set
2106          * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2107          * ticket.
2108          */
2109         EVP_Digest(p, ticklen,
2110                         s->session->session_id, &s->session->session_id_length,
2111 #ifndef OPENSSL_NO_SHA256
2112                                                         EVP_sha256(), NULL);
2113 #else
2114                                                         EVP_sha1(), NULL);
2115 #endif
2116         ret=1;
2117         return(ret);
2118 f_err:
2119         ssl3_send_alert(s,SSL3_AL_FATAL,al);
2120 err:
2121         return(-1);
2122         }
2123
2124 int ssl3_get_cert_status(SSL *s)
2125         {
2126         int ok, al;
2127         unsigned long resplen,n;
2128         const unsigned char *p;
2129
2130         n=s->method->ssl_get_message(s,
2131                 SSL3_ST_CR_CERT_STATUS_A,
2132                 SSL3_ST_CR_CERT_STATUS_B,
2133                 SSL3_MT_CERTIFICATE_STATUS,
2134                 16384,
2135                 &ok);
2136
2137         if (!ok) return((int)n);
2138         if (n < 4)
2139                 {
2140                 /* need at least status type + length */
2141                 al = SSL_AD_DECODE_ERROR;
2142                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2143                 goto f_err;
2144                 }
2145         p = (unsigned char *)s->init_msg;
2146         if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2147                 {
2148                 al = SSL_AD_DECODE_ERROR;
2149                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2150                 goto f_err;
2151                 }
2152         n2l3(p, resplen);
2153         if (resplen + 4 != n)
2154                 {
2155                 al = SSL_AD_DECODE_ERROR;
2156                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2157                 goto f_err;
2158                 }
2159         if (s->tlsext_ocsp_resp)
2160                 OPENSSL_free(s->tlsext_ocsp_resp);
2161         s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2162         if (!s->tlsext_ocsp_resp)
2163                 {
2164                 al = SSL_AD_INTERNAL_ERROR;
2165                 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2166                 goto f_err;
2167                 }
2168         s->tlsext_ocsp_resplen = resplen;
2169         if (s->ctx->tlsext_status_cb)
2170                 {
2171                 int ret;
2172                 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2173                 if (ret == 0)
2174                         {
2175                         al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2176                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2177                         goto f_err;
2178                         }
2179                 if (ret < 0)
2180                         {
2181                         al = SSL_AD_INTERNAL_ERROR;
2182                         SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2183                         goto f_err;
2184                         }
2185                 }
2186         return 1;
2187 f_err:
2188         ssl3_send_alert(s,SSL3_AL_FATAL,al);
2189         return(-1);
2190         }
2191 #endif
2192
2193 int ssl3_get_server_done(SSL *s)
2194         {
2195         int ok,ret=0;
2196         long n;
2197
2198         n=s->method->ssl_get_message(s,
2199                 SSL3_ST_CR_SRVR_DONE_A,
2200                 SSL3_ST_CR_SRVR_DONE_B,
2201                 SSL3_MT_SERVER_DONE,
2202                 30, /* should be very small, like 0 :-) */
2203                 &ok);
2204
2205         if (!ok) return((int)n);
2206         if (n > 0)
2207                 {
2208                 /* should contain no data */
2209                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2210                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2211                 return -1;
2212                 }
2213         ret=1;
2214         return(ret);
2215         }
2216
2217
2218 int ssl3_send_client_key_exchange(SSL *s)
2219         {
2220         unsigned char *p,*d;
2221         int n;
2222         unsigned long alg_k;
2223 #ifndef OPENSSL_NO_RSA
2224         unsigned char *q;
2225         EVP_PKEY *pkey=NULL;
2226 #endif
2227 #ifndef OPENSSL_NO_KRB5
2228         KSSL_ERR kssl_err;
2229 #endif /* OPENSSL_NO_KRB5 */
2230 #ifndef OPENSSL_NO_ECDH
2231         EC_KEY *clnt_ecdh = NULL;
2232         const EC_POINT *srvr_ecpoint = NULL;
2233         EVP_PKEY *srvr_pub_pkey = NULL;
2234         unsigned char *encodedPoint = NULL;
2235         int encoded_pt_len = 0;
2236         BN_CTX * bn_ctx = NULL;
2237 #endif
2238
2239         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2240                 {
2241                 d=(unsigned char *)s->init_buf->data;
2242                 p= &(d[4]);
2243
2244                 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2245
2246                 /* Fool emacs indentation */
2247                 if (0) {}
2248 #ifndef OPENSSL_NO_RSA
2249                 else if (alg_k & SSL_kRSA)
2250                         {
2251                         RSA *rsa;
2252                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2253
2254                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
2255                                 rsa=s->session->sess_cert->peer_rsa_tmp;
2256                         else
2257                                 {
2258                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2259                                 if ((pkey == NULL) ||
2260                                         (pkey->type != EVP_PKEY_RSA) ||
2261                                         (pkey->pkey.rsa == NULL))
2262                                         {
2263                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2264                                         goto err;
2265                                         }
2266                                 rsa=pkey->pkey.rsa;
2267                                 EVP_PKEY_free(pkey);
2268                                 }
2269
2270                         tmp_buf[0]=s->client_version>>8;
2271                         tmp_buf[1]=s->client_version&0xff;
2272                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2273                                         goto err;
2274
2275                         s->session->master_key_length=sizeof tmp_buf;
2276
2277                         q=p;
2278                         /* Fix buf for TLS and beyond */
2279                         if (s->version > SSL3_VERSION)
2280                                 p+=2;
2281                         n=RSA_public_encrypt(sizeof tmp_buf,
2282                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2283 #ifdef PKCS1_CHECK
2284                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2285                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2286 #endif
2287                         if (n <= 0)
2288                                 {
2289                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2290                                 goto err;
2291                                 }
2292
2293                         /* Fix buf for TLS and beyond */
2294                         if (s->version > SSL3_VERSION)
2295                                 {
2296                                 s2n(n,q);
2297                                 n+=2;
2298                                 }
2299
2300                         s->session->master_key_length=
2301                                 s->method->ssl3_enc->generate_master_secret(s,
2302                                         s->session->master_key,
2303                                         tmp_buf,sizeof tmp_buf);
2304                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2305                         }
2306 #endif
2307 #ifndef OPENSSL_NO_KRB5
2308                 else if (alg_k & SSL_kKRB5)
2309                         {
2310                         krb5_error_code krb5rc;
2311                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
2312                         /*  krb5_data   krb5_ap_req;  */
2313                         krb5_data       *enc_ticket;
2314                         krb5_data       authenticator, *authp = NULL;
2315                         EVP_CIPHER_CTX  ciph_ctx;
2316                         const EVP_CIPHER *enc = NULL;
2317                         unsigned char   iv[EVP_MAX_IV_LENGTH];
2318                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2319                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
2320                                                 + EVP_MAX_IV_LENGTH];
2321                         int             padl, outl = sizeof(epms);
2322
2323                         EVP_CIPHER_CTX_init(&ciph_ctx);
2324
2325 #ifdef KSSL_DEBUG
2326                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2327                                 alg_k, SSL_kKRB5);
2328 #endif  /* KSSL_DEBUG */
2329
2330                         authp = NULL;
2331 #ifdef KRB5SENDAUTH
2332                         if (KRB5SENDAUTH)  authp = &authenticator;
2333 #endif  /* KRB5SENDAUTH */
2334
2335                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2336                                 &kssl_err);
2337                         enc = kssl_map_enc(kssl_ctx->enctype);
2338                         if (enc == NULL)
2339                             goto err;
2340 #ifdef KSSL_DEBUG
2341                         {
2342                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
2343                         if (krb5rc && kssl_err.text)
2344                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2345                         }
2346 #endif  /* KSSL_DEBUG */
2347
2348                         if (krb5rc)
2349                                 {
2350                                 ssl3_send_alert(s,SSL3_AL_FATAL,
2351                                                 SSL_AD_HANDSHAKE_FAILURE);
2352                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2353                                                 kssl_err.reason);
2354                                 goto err;
2355                                 }
2356
2357                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
2358                         **  in place of RFC 2712 KerberosWrapper, as in:
2359                         **
2360                         **  Send ticket (copy to *p, set n = length)
2361                         **  n = krb5_ap_req.length;
2362                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2363                         **  if (krb5_ap_req.data)
2364                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2365                         **
2366                         **  Now using real RFC 2712 KerberosWrapper
2367                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2368                         **  Note: 2712 "opaque" types are here replaced
2369                         **  with a 2-byte length followed by the value.
2370                         **  Example:
2371                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2372                         **  Where "xx xx" = length bytes.  Shown here with
2373                         **  optional authenticator omitted.
2374                         */
2375
2376                         /*  KerberosWrapper.Ticket              */
2377                         s2n(enc_ticket->length,p);
2378                         memcpy(p, enc_ticket->data, enc_ticket->length);
2379                         p+= enc_ticket->length;
2380                         n = enc_ticket->length + 2;
2381
2382                         /*  KerberosWrapper.Authenticator       */
2383                         if (authp  &&  authp->length)
2384                                 {
2385                                 s2n(authp->length,p);
2386                                 memcpy(p, authp->data, authp->length);
2387                                 p+= authp->length;
2388                                 n+= authp->length + 2;
2389
2390                                 free(authp->data);
2391                                 authp->data = NULL;
2392                                 authp->length = 0;
2393                                 }
2394                         else
2395                                 {
2396                                 s2n(0,p);/*  null authenticator length  */
2397                                 n+=2;
2398                                 }
2399
2400                             tmp_buf[0]=s->client_version>>8;
2401                             tmp_buf[1]=s->client_version&0xff;
2402                             if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2403                                 goto err;
2404
2405                         /*  20010420 VRS.  Tried it this way; failed.
2406                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2407                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2408                         **                              kssl_ctx->length);
2409                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2410                         */
2411
2412                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
2413                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2414                                 kssl_ctx->key,iv);
2415                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2416                                 sizeof tmp_buf);
2417                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2418                         outl += padl;
2419                         if (outl > (int)sizeof epms)
2420                                 {
2421                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2422                                 goto err;
2423                                 }
2424                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2425
2426                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
2427                         s2n(outl,p);
2428                         memcpy(p, epms, outl);
2429                         p+=outl;
2430                         n+=outl + 2;
2431
2432                         s->session->master_key_length=
2433                                 s->method->ssl3_enc->generate_master_secret(s,
2434                                         s->session->master_key,
2435                                         tmp_buf, sizeof tmp_buf);
2436
2437                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2438                         OPENSSL_cleanse(epms, outl);
2439                         }
2440 #endif
2441 #ifndef OPENSSL_NO_DH
2442                 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2443                         {
2444                         DH *dh_srvr,*dh_clnt;
2445
2446                         if (s->session->sess_cert == NULL)
2447                                 {
2448                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2449                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2450                                 goto err;
2451                                 }
2452
2453                         if (s->session->sess_cert->peer_dh_tmp != NULL)
2454                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2455                         else
2456                                 {
2457                                 /* we get them from the cert */
2458                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2459                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2460                                 goto err;
2461                                 }
2462
2463                         /* generate a new random key */
2464                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2465                                 {
2466                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2467                                 goto err;
2468                                 }
2469                         if (!DH_generate_key(dh_clnt))
2470                                 {
2471                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2472                                 DH_free(dh_clnt);
2473                                 goto err;
2474                                 }
2475
2476                         /* use the 'p' output buffer for the DH key, but
2477                          * make sure to clear it out afterwards */
2478
2479                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2480
2481                         if (n <= 0)
2482                                 {
2483                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2484                                 DH_free(dh_clnt);
2485                                 goto err;
2486                                 }
2487
2488                         /* generate master key from the result */
2489                         s->session->master_key_length=
2490                                 s->method->ssl3_enc->generate_master_secret(s,
2491                                         s->session->master_key,p,n);
2492                         /* clean up */
2493                         memset(p,0,n);
2494
2495                         /* send off the data */
2496                         n=BN_num_bytes(dh_clnt->pub_key);
2497                         s2n(n,p);
2498                         BN_bn2bin(dh_clnt->pub_key,p);
2499                         n+=2;
2500
2501                         DH_free(dh_clnt);
2502
2503                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
2504                         }
2505 #endif
2506
2507 #ifndef OPENSSL_NO_ECDH
2508                 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2509                         {
2510                         const EC_GROUP *srvr_group = NULL;
2511                         EC_KEY *tkey;
2512                         int ecdh_clnt_cert = 0;
2513                         int field_size = 0;
2514
2515                         /* Did we send out the client's
2516                          * ECDH share for use in premaster
2517                          * computation as part of client certificate?
2518                          * If so, set ecdh_clnt_cert to 1.
2519                          */
2520                         if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2521                                 {
2522                                 /* XXX: For now, we do not support client
2523                                  * authentication using ECDH certificates.
2524                                  * To add such support, one needs to add
2525                                  * code that checks for appropriate
2526                                  * conditions and sets ecdh_clnt_cert to 1.
2527                                  * For example, the cert have an ECC
2528                                  * key on the same curve as the server's
2529                                  * and the key should be authorized for
2530                                  * key agreement.
2531                                  *
2532                                  * One also needs to add code in ssl3_connect
2533                                  * to skip sending the certificate verify
2534                                  * message.
2535                                  *
2536                                  * if ((s->cert->key->privatekey != NULL) &&
2537                                  *     (s->cert->key->privatekey->type ==
2538                                  *      EVP_PKEY_EC) && ...)
2539                                  * ecdh_clnt_cert = 1;
2540                                  */
2541                                 }
2542
2543                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2544                                 {
2545                                 tkey = s->session->sess_cert->peer_ecdh_tmp;
2546                                 }
2547                         else
2548                                 {
2549                                 /* Get the Server Public Key from Cert */
2550                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2551                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2552                                 if ((srvr_pub_pkey == NULL) ||
2553                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2554                                     (srvr_pub_pkey->pkey.ec == NULL))
2555                                         {
2556                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2557                                             ERR_R_INTERNAL_ERROR);
2558                                         goto err;
2559                                         }
2560
2561                                 tkey = srvr_pub_pkey->pkey.ec;
2562                                 }
2563
2564                         srvr_group   = EC_KEY_get0_group(tkey);
2565                         srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2566
2567                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2568                                 {
2569                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2570                                     ERR_R_INTERNAL_ERROR);
2571                                 goto err;
2572                                 }
2573
2574                         if ((clnt_ecdh=EC_KEY_new()) == NULL)
2575                                 {
2576                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2577                                 goto err;
2578                                 }
2579
2580                         if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2581                                 {
2582                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2583                                 goto err;
2584                                 }
2585                         if (ecdh_clnt_cert)
2586                                 {
2587                                 /* Reuse key info from our certificate
2588                                  * We only need our private key to perform
2589                                  * the ECDH computation.
2590                                  */
2591                                 const BIGNUM *priv_key;
2592                                 tkey = s->cert->key->privatekey->pkey.ec;
2593                                 priv_key = EC_KEY_get0_private_key(tkey);
2594                                 if (priv_key == NULL)
2595                                         {
2596                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2597                                         goto err;
2598                                         }
2599                                 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2600                                         {
2601                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2602                                         goto err;
2603                                         }
2604                                 }
2605                         else
2606                                 {
2607                                 /* Generate a new ECDH key pair */
2608                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
2609                                         {
2610                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2611                                         goto err;
2612                                         }
2613                                 }
2614
2615                         /* use the 'p' output buffer for the ECDH key, but
2616                          * make sure to clear it out afterwards
2617                          */
2618
2619                         field_size = EC_GROUP_get_degree(srvr_group);
2620                         if (field_size <= 0)
2621                                 {
2622                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2623                                        ERR_R_ECDH_LIB);
2624                                 goto err;
2625                                 }
2626                         n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2627                         if (n <= 0)
2628                                 {
2629                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2630                                        ERR_R_ECDH_LIB);
2631                                 goto err;
2632                                 }
2633
2634                         /* generate master key from the result */
2635                         s->session->master_key_length = s->method->ssl3_enc \
2636                             -> generate_master_secret(s,
2637                                 s->session->master_key,
2638                                 p, n);
2639
2640                         memset(p, 0, n); /* clean up */
2641
2642                         if (ecdh_clnt_cert)
2643                                 {
2644                                 /* Send empty client key exch message */
2645                                 n = 0;
2646                                 }
2647                         else
2648                                 {
2649                                 /* First check the size of encoding and
2650                                  * allocate memory accordingly.
2651                                  */
2652                                 encoded_pt_len =
2653                                     EC_POINT_point2oct(srvr_group,
2654                                         EC_KEY_get0_public_key(clnt_ecdh),
2655                                         POINT_CONVERSION_UNCOMPRESSED,
2656                                         NULL, 0, NULL);
2657
2658                                 encodedPoint = (unsigned char *)
2659                                     OPENSSL_malloc(encoded_pt_len *
2660                                         sizeof(unsigned char));
2661                                 bn_ctx = BN_CTX_new();
2662                                 if ((encodedPoint == NULL) ||
2663                                     (bn_ctx == NULL))
2664                                         {
2665                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2666                                         goto err;
2667                                         }
2668
2669                                 /* Encode the public key */
2670                                 n = EC_POINT_point2oct(srvr_group,
2671                                     EC_KEY_get0_public_key(clnt_ecdh),
2672                                     POINT_CONVERSION_UNCOMPRESSED,
2673                                     encodedPoint, encoded_pt_len, bn_ctx);
2674
2675                                 *p = n; /* length of encoded point */
2676                                 /* Encoded point will be copied here */
2677                                 p += 1;
2678                                 /* copy the point */
2679                                 memcpy((unsigned char *)p, encodedPoint, n);
2680                                 /* increment n to account for length field */
2681                                 n += 1;
2682                                 }
2683
2684                         /* Free allocated memory */
2685                         BN_CTX_free(bn_ctx);
2686                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2687                         if (clnt_ecdh != NULL)
2688                                  EC_KEY_free(clnt_ecdh);
2689                         EVP_PKEY_free(srvr_pub_pkey);
2690                         }
2691 #endif /* !OPENSSL_NO_ECDH */
2692                 else if (alg_k & SSL_kGOST)
2693                         {
2694                         /* GOST key exchange message creation */
2695                         EVP_PKEY_CTX *pkey_ctx;
2696                         X509 *peer_cert;
2697                         size_t msglen;
2698                         unsigned int md_len;
2699                         int keytype;
2700                         unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2701                         EVP_MD_CTX *ukm_hash;
2702                         EVP_PKEY *pub_key;
2703
2704                         /* Get server sertificate PKEY and create ctx from it */
2705                         peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2706                         if (!peer_cert)
2707                                 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2708                         if (!peer_cert)         {
2709                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2710                                         goto err;
2711                                 }
2712
2713                         pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2714                         /* If we have send a certificate, and certificate key
2715
2716                          * parameters match those of server certificate, use
2717                          * certificate key for key exchange
2718                          */
2719
2720                          /* Otherwise, generate ephemeral key pair */
2721
2722                         EVP_PKEY_encrypt_init(pkey_ctx);
2723                           /* Generate session key */
2724                     RAND_bytes(premaster_secret,32);
2725                         /* If we have client certificate, use its secret as peer key */
2726                         if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2727                                 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2728                                         /* If there was an error - just ignore it. Ephemeral key
2729                                         * would be used
2730                                         */
2731                                         ERR_clear_error();
2732                                 }
2733                         }
2734                         /* Compute shared IV and store it in algorithm-specific
2735                          * context data */
2736                         ukm_hash = EVP_MD_CTX_create();
2737                         EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2738                         EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2739                         EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2740                         EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2741                         EVP_MD_CTX_destroy(ukm_hash);
2742                         if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2743                                 8,shared_ukm)<0) {
2744                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2745                                                 SSL_R_LIBRARY_BUG);
2746                                         goto err;
2747                                 }
2748                         /* Make GOST keytransport blob message */
2749                         /*Encapsulate it into sequence */
2750                         *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2751                         msglen=255;
2752                         if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2753                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2754                                         SSL_R_LIBRARY_BUG);
2755                                 goto err;
2756                         }
2757                         if (msglen >= 0x80)
2758                                 {
2759                                 *(p++)=0x81;
2760                                 *(p++)= msglen & 0xff;
2761                                 n=msglen+3;
2762                                 }
2763                         else
2764                                 {
2765                                 *(p++)= msglen & 0xff;
2766                                 n=msglen+2;
2767                                 }
2768                         memcpy(p, tmp, msglen);
2769                         /* Check if pubkey from client certificate was used */
2770                         if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2771                                 {
2772                                 /* Set flag "skip certificate verify" */
2773                                 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2774                                 }
2775                         EVP_PKEY_CTX_free(pkey_ctx);
2776                         s->session->master_key_length=
2777                                 s->method->ssl3_enc->generate_master_secret(s,
2778                                         s->session->master_key,premaster_secret,32);
2779                         EVP_PKEY_free(pub_key);
2780
2781                         }
2782 #ifndef OPENSSL_NO_SRP
2783                 else if (alg_k & SSL_kSRP)
2784                         {
2785                         if (s->srp_ctx.A != NULL)
2786                                 {
2787                                 /* send off the data */
2788                                 n=BN_num_bytes(s->srp_ctx.A);
2789                                 s2n(n,p);
2790                                 BN_bn2bin(s->srp_ctx.A,p);
2791                                 n+=2;
2792                                 }
2793                         else
2794                                 {
2795                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2796                                 goto err;
2797                                 }
2798                         if (s->session->srp_username != NULL)
2799                                 OPENSSL_free(s->session->srp_username);
2800                         s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2801                         if (s->session->srp_username == NULL)
2802                                 {
2803                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2804                                         ERR_R_MALLOC_FAILURE);
2805                                 goto err;
2806                                 }
2807
2808                         if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2809                                 {
2810                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2811                                 goto err;
2812                                 }
2813                         }
2814 #endif
2815 #ifndef OPENSSL_NO_PSK
2816                 else if (alg_k & SSL_kPSK)
2817                         {
2818                         char identity[PSK_MAX_IDENTITY_LEN];
2819                         unsigned char *t = NULL;
2820                         unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2821                         unsigned int pre_ms_len = 0, psk_len = 0;
2822                         int psk_err = 1;
2823
2824                         n = 0;
2825                         if (s->psk_client_callback == NULL)
2826                                 {
2827                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2828                                         SSL_R_PSK_NO_CLIENT_CB);
2829                                 goto err;
2830                                 }
2831
2832                         psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2833                                 identity, PSK_MAX_IDENTITY_LEN,
2834                                 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2835                         if (psk_len > PSK_MAX_PSK_LEN)
2836                                 {
2837                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2838                                         ERR_R_INTERNAL_ERROR);
2839                                 goto psk_err;
2840                                 }
2841                         else if (psk_len == 0)
2842                                 {
2843                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2844                                         SSL_R_PSK_IDENTITY_NOT_FOUND);
2845                                 goto psk_err;
2846                                 }
2847
2848                         /* create PSK pre_master_secret */
2849                         pre_ms_len = 2+psk_len+2+psk_len;
2850                         t = psk_or_pre_ms;
2851                         memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2852                         s2n(psk_len, t);
2853                         memset(t, 0, psk_len);
2854                         t+=psk_len;
2855                         s2n(psk_len, t);
2856
2857                         if (s->session->psk_identity_hint != NULL)
2858                                 OPENSSL_free(s->session->psk_identity_hint);
2859                         s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2860                         if (s->ctx->psk_identity_hint != NULL &&
2861                                 s->session->psk_identity_hint == NULL)
2862                                 {
2863                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2864                                         ERR_R_MALLOC_FAILURE);
2865                                 goto psk_err;
2866                                 }
2867
2868                         if (s->session->psk_identity != NULL)
2869                                 OPENSSL_free(s->session->psk_identity);
2870                         s->session->psk_identity = BUF_strdup(identity);
2871                         if (s->session->psk_identity == NULL)
2872                                 {
2873                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2874                                         ERR_R_MALLOC_FAILURE);
2875                                 goto psk_err;
2876                                 }
2877
2878                         s->session->master_key_length =
2879                                 s->method->ssl3_enc->generate_master_secret(s,
2880                                         s->session->master_key,
2881                                         psk_or_pre_ms, pre_ms_len);
2882                         n = strlen(identity);
2883                         s2n(n, p);
2884                         memcpy(p, identity, n);
2885                         n+=2;
2886                         psk_err = 0;
2887                 psk_err:
2888                         OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2889                         OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2890                         if (psk_err != 0)
2891                                 {
2892                                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2893                                 goto err;
2894                                 }
2895                         }
2896 #endif
2897                 else
2898                         {
2899                         ssl3_send_alert(s, SSL3_AL_FATAL,
2900                             SSL_AD_HANDSHAKE_FAILURE);
2901                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2902                             ERR_R_INTERNAL_ERROR);
2903                         goto err;
2904                         }
2905
2906                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2907                 l2n3(n,d);
2908
2909                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2910                 /* number of bytes to write */
2911                 s->init_num=n+4;
2912                 s->init_off=0;
2913                 }
2914
2915         /* SSL3_ST_CW_KEY_EXCH_B */
2916         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2917 err:
2918 #ifndef OPENSSL_NO_ECDH
2919         BN_CTX_free(bn_ctx);
2920         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2921         if (clnt_ecdh != NULL)
2922                 EC_KEY_free(clnt_ecdh);
2923         EVP_PKEY_free(srvr_pub_pkey);
2924 #endif
2925         return(-1);
2926         }
2927
2928 int ssl3_send_client_verify(SSL *s)
2929         {
2930         unsigned char *p,*d;
2931         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2932         EVP_PKEY *pkey;
2933         EVP_PKEY_CTX *pctx=NULL;
2934         EVP_MD_CTX mctx;
2935         unsigned u=0;
2936         unsigned long n;
2937         int j;
2938
2939         EVP_MD_CTX_init(&mctx);
2940
2941         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2942                 {
2943                 d=(unsigned char *)s->init_buf->data;
2944                 p= &(d[4]);
2945                 pkey=s->cert->key->privatekey;
2946 /* Create context from key and test if sha1 is allowed as digest */
2947                 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2948                 EVP_PKEY_sign_init(pctx);
2949                 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2950                         {
2951                         if (TLS1_get_version(s) < TLS1_2_VERSION)
2952                                 s->method->ssl3_enc->cert_verify_mac(s,
2953                                                 NID_sha1,
2954                                                 &(data[MD5_DIGEST_LENGTH]));
2955                         }
2956                 else
2957                         {
2958                         ERR_clear_error();
2959                         }
2960                 /* For TLS v1.2 send signature algorithm and signature
2961                  * using agreed digest and cached handshake records.
2962                  */
2963                 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2964                         {
2965                         long hdatalen = 0;
2966                         void *hdata;
2967                         const EVP_MD *md = s->cert->key->digest;
2968                         hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2969                                                                 &hdata);
2970                         if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
2971                                 {
2972                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2973                                                 ERR_R_INTERNAL_ERROR);
2974                                 goto err;
2975                                 }
2976                         p += 2;
2977 #ifdef SSL_DEBUG
2978                         fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2979                                                         EVP_MD_name(md));
2980 #endif
2981                         if (!EVP_SignInit_ex(&mctx, md, NULL)
2982                                 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2983                                 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
2984                                 {
2985                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2986                                                 ERR_R_EVP_LIB);
2987                                 goto err;
2988                                 }
2989                         s2n(u,p);
2990                         n = u + 4;
2991                         if (!ssl3_digest_cached_records(s))
2992                                 goto err;
2993                         }
2994                 else
2995 #ifndef OPENSSL_NO_RSA
2996                 if (pkey->type == EVP_PKEY_RSA)
2997                         {
2998                         s->method->ssl3_enc->cert_verify_mac(s,
2999                                 NID_md5,
3000                                 &(data[0]));
3001                         if (RSA_sign(NID_md5_sha1, data,
3002                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3003                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3004                                 {
3005                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3006                                 goto err;
3007                                 }
3008                         s2n(u,p);
3009                         n=u+2;
3010                         }
3011                 else
3012 #endif
3013 #ifndef OPENSSL_NO_DSA
3014                         if (pkey->type == EVP_PKEY_DSA)
3015                         {
3016                         if (!DSA_sign(pkey->save_type,
3017                                 &(data[MD5_DIGEST_LENGTH]),
3018                                 SHA_DIGEST_LENGTH,&(p[2]),
3019                                 (unsigned int *)&j,pkey->pkey.dsa))
3020                                 {
3021                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3022                                 goto err;
3023                                 }
3024                         s2n(j,p);
3025                         n=j+2;
3026                         }
3027                 else
3028 #endif
3029 #ifndef OPENSSL_NO_ECDSA
3030                         if (pkey->type == EVP_PKEY_EC)
3031                         {
3032                         if (!ECDSA_sign(pkey->save_type,
3033                                 &(data[MD5_DIGEST_LENGTH]),
3034                                 SHA_DIGEST_LENGTH,&(p[2]),
3035                                 (unsigned int *)&j,pkey->pkey.ec))
3036                                 {
3037                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3038                                     ERR_R_ECDSA_LIB);
3039                                 goto err;
3040                                 }
3041                         s2n(j,p);
3042                         n=j+2;
3043                         }
3044                 else
3045 #endif
3046                 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3047                 {
3048                 unsigned char signbuf[64];
3049                 int i;
3050                 size_t sigsize=64;
3051                 s->method->ssl3_enc->cert_verify_mac(s,
3052                         NID_id_GostR3411_94,
3053                         data);
3054                 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3055                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3056                         ERR_R_INTERNAL_ERROR);
3057                         goto err;
3058                 }
3059                 for (i=63,j=0; i>=0; j++, i--) {
3060                         p[2+j]=signbuf[i];
3061                 }
3062                 s2n(j,p);
3063                 n=j+2;
3064                 }
3065                 else
3066                 {
3067                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3068                         goto err;
3069                 }
3070                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3071                 l2n3(n,d);
3072
3073                 s->state=SSL3_ST_CW_CERT_VRFY_B;
3074                 s->init_num=(int)n+4;
3075                 s->init_off=0;
3076                 }
3077         EVP_MD_CTX_cleanup(&mctx);
3078         EVP_PKEY_CTX_free(pctx);
3079         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3080 err:
3081         EVP_MD_CTX_cleanup(&mctx);
3082         EVP_PKEY_CTX_free(pctx);
3083         return(-1);
3084         }
3085
3086 int ssl3_send_client_certificate(SSL *s)
3087         {
3088         X509 *x509=NULL;
3089         EVP_PKEY *pkey=NULL;
3090         int i;
3091         unsigned long l;
3092
3093         if (s->state == SSL3_ST_CW_CERT_A)
3094                 {
3095                 if ((s->cert == NULL) ||
3096                         (s->cert->key->x509 == NULL) ||
3097                         (s->cert->key->privatekey == NULL))
3098                         s->state=SSL3_ST_CW_CERT_B;
3099                 else
3100                         s->state=SSL3_ST_CW_CERT_C;
3101                 }
3102
3103         /* We need to get a client cert */
3104         if (s->state == SSL3_ST_CW_CERT_B)
3105                 {
3106                 /* If we get an error, we need to
3107                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3108                  * We then get retied later */
3109                 i=0;
3110                 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3111                 if (i < 0)
3112                         {
3113                         s->rwstate=SSL_X509_LOOKUP;
3114                         return(-1);
3115                         }
3116                 s->rwstate=SSL_NOTHING;
3117                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3118                         {
3119                         s->state=SSL3_ST_CW_CERT_B;
3120                         if (    !SSL_use_certificate(s,x509) ||
3121                                 !SSL_use_PrivateKey(s,pkey))
3122                                 i=0;
3123                         }
3124                 else if (i == 1)
3125                         {
3126                         i=0;
3127                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3128                         }
3129
3130                 if (x509 != NULL) X509_free(x509);
3131                 if (pkey != NULL) EVP_PKEY_free(pkey);
3132                 if (i == 0)
3133                         {
3134                         if (s->version == SSL3_VERSION)
3135                                 {
3136                                 s->s3->tmp.cert_req=0;
3137                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3138                                 return(1);
3139                                 }
3140                         else
3141                                 {
3142                                 s->s3->tmp.cert_req=2;
3143                                 }
3144                         }
3145
3146                 /* Ok, we have a cert */
3147                 s->state=SSL3_ST_CW_CERT_C;
3148                 }
3149
3150         if (s->state == SSL3_ST_CW_CERT_C)
3151                 {
3152                 s->state=SSL3_ST_CW_CERT_D;
3153                 l=ssl3_output_cert_chain(s,
3154                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3155                 s->init_num=(int)l;
3156                 s->init_off=0;
3157                 }
3158         /* SSL3_ST_CW_CERT_D */
3159         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3160         }
3161
3162 #define has_bits(i,m)   (((i)&(m)) == (m))
3163
3164 int ssl3_check_cert_and_algorithm(SSL *s)
3165         {
3166         int i,idx;
3167         long alg_k,alg_a;
3168         EVP_PKEY *pkey=NULL;
3169         SESS_CERT *sc;
3170 #ifndef OPENSSL_NO_RSA
3171         RSA *rsa;
3172 #endif
3173 #ifndef OPENSSL_NO_DH
3174         DH *dh;
3175 #endif
3176
3177         alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3178         alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3179
3180         /* we don't have a certificate */
3181         if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3182                 return(1);
3183
3184         sc=s->session->sess_cert;
3185         if (sc == NULL)
3186                 {
3187                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3188                 goto err;
3189                 }
3190
3191 #ifndef OPENSSL_NO_RSA
3192         rsa=s->session->sess_cert->peer_rsa_tmp;
3193 #endif
3194 #ifndef OPENSSL_NO_DH
3195         dh=s->session->sess_cert->peer_dh_tmp;
3196 #endif
3197
3198         /* This is the passed certificate */
3199
3200         idx=sc->peer_cert_type;
3201 #ifndef OPENSSL_NO_ECDH
3202         if (idx == SSL_PKEY_ECC)
3203                 {
3204                 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3205                                                                 s) == 0)
3206                         { /* check failed */
3207                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3208                         goto f_err;
3209                         }
3210                 else
3211                         {
3212                         return 1;
3213                         }
3214                 }
3215 #endif
3216         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3217         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3218         EVP_PKEY_free(pkey);
3219
3220
3221         /* Check that we have a certificate if we require one */
3222         if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3223                 {
3224                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3225                 goto f_err;
3226                 }
3227 #ifndef OPENSSL_NO_DSA
3228         else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3229                 {
3230                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3231                 goto f_err;
3232                 }
3233 #endif
3234 #ifndef OPENSSL_NO_RSA
3235         if ((alg_k & SSL_kRSA) &&
3236                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3237                 {
3238                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3239                 goto f_err;
3240                 }
3241 #endif
3242 #ifndef OPENSSL_NO_DH
3243         if ((alg_k & SSL_kEDH) &&
3244                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3245                 {
3246                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3247                 goto f_err;
3248                 }
3249         else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3250                 {
3251                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3252                 goto f_err;
3253                 }
3254 #ifndef OPENSSL_NO_DSA
3255         else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3256                 {
3257                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3258                 goto f_err;
3259                 }
3260 #endif
3261 #endif
3262
3263         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3264                 {
3265 #ifndef OPENSSL_NO_RSA
3266                 if (alg_k & SSL_kRSA)
3267                         {
3268                         if (rsa == NULL
3269                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3270                                 {
3271                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3272                                 goto f_err;
3273                                 }
3274                         }
3275                 else
3276 #endif
3277 #ifndef OPENSSL_NO_DH
3278                         if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3279                             {
3280                             if (dh == NULL
3281                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3282                                 {
3283                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3284                                 goto f_err;
3285                                 }
3286                         }
3287                 else
3288 #endif
3289                         {
3290                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3291                         goto f_err;
3292                         }
3293                 }
3294         return(1);
3295 f_err:
3296         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3297 err:
3298         return(0);
3299         }
3300
3301 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3302 int ssl3_send_next_proto(SSL *s)
3303         {
3304         unsigned int len, padding_len;
3305         unsigned char *d;
3306
3307         if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3308                 {
3309                 len = s->next_proto_negotiated_len;
3310                 padding_len = 32 - ((len + 2) % 32);
3311                 d = (unsigned char *)s->init_buf->data;
3312                 d[4] = len;
3313                 memcpy(d + 5, s->next_proto_negotiated, len);
3314                 d[5 + len] = padding_len;
3315                 memset(d + 6 + len, 0, padding_len);
3316                 *(d++)=SSL3_MT_NEXT_PROTO;
3317                 l2n3(2 + len + padding_len, d);
3318                 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3319                 s->init_num = 4 + 2 + len + padding_len;
3320                 s->init_off = 0;
3321                 }
3322
3323         return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3324 }
3325 #endif  /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3326
3327 /* Check to see if handshake is full or resumed. Usually this is just a
3328  * case of checking to see if a cache hit has occurred. In the case of
3329  * session tickets we have to check the next message to be sure.
3330  */
3331
3332 #ifndef OPENSSL_NO_TLSEXT
3333 int ssl3_check_finished(SSL *s)
3334         {
3335         int ok;
3336         long n;
3337         /* If we have no ticket it cannot be a resumed session. */
3338         if (!s->session->tlsext_tick)
3339                 return 1;
3340         /* this function is called when we really expect a Certificate
3341          * message, so permit appropriate message length */
3342         n=s->method->ssl_get_message(s,
3343                 SSL3_ST_CR_CERT_A,
3344                 SSL3_ST_CR_CERT_B,
3345                 -1,
3346                 s->max_cert_list,
3347                 &ok);
3348         if (!ok) return((int)n);
3349         s->s3->tmp.reuse_message = 1;
3350         if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3351                 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3352                 return 2;
3353
3354         return 1;
3355         }
3356 #endif
3357
3358 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3359         {
3360         int i = 0;
3361 #ifndef OPENSSL_NO_ENGINE
3362         if (s->ctx->client_cert_engine)
3363                 {
3364                 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3365                                                 SSL_get_client_CA_list(s),
3366                                                 px509, ppkey, NULL, NULL, NULL);
3367                 if (i != 0)
3368                         return i;
3369                 }
3370 #endif
3371         if (s->ctx->client_cert_cb)
3372                 i = s->ctx->client_cert_cb(s,px509,ppkey);
3373         return i;
3374         }