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) 1998-2003 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 #include <stdio.h>
 126 #include "ssl_locl.h"
 127 #include "kssl_lcl.h"
 128 #include <openssl/buffer.h>
 129 #include <openssl/rand.h>
 130 #include <openssl/objects.h>
 131 #include <openssl/evp.h>
 132 #include <openssl/md5.h>
 133 #include <openssl/dh.h>
 134 #include <openssl/bn.h>
 135
 136 static SSL_METHOD *ssl3_get_client_method(int ver);
 137 static int ssl3_client_hello(SSL *s);
 138 static int ssl3_get_server_hello(SSL *s);
 139 static int ssl3_get_certificate_request(SSL *s);
 140 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
 141 static int ssl3_get_server_done(SSL *s);
 142 static int ssl3_send_client_verify(SSL *s);
 143 static int ssl3_send_client_certificate(SSL *s);
 144 static int ssl3_send_client_key_exchange(SSL *s);
 145 static int ssl3_get_key_exchange(SSL *s);
 146 static int ssl3_get_server_certificate(SSL *s);
 147 static int ssl3_check_cert_and_algorithm(SSL *s);
 148
 149 #ifndef OPENSSL_NO_ECDH
 150 static int curve_id2nid(int curve_id);
 151 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
 152 #endif
 153
 154 static SSL_METHOD *ssl3_get_client_method(int ver)
 155         {
 156         if (ver == SSL3_VERSION)
 157                 return(SSLv3_client_method());
 158         else
 159                 return(NULL);
 160         }
 161
 162 SSL_METHOD *SSLv3_client_method(void)
 163         {
 164         static int init=1;
 165         static SSL_METHOD SSLv3_client_data;
 166
 167         if (init)
 168                 {
 169                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
 170
 171                 if (init)
 172                         {
 173                         memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
 174                                 sizeof(SSL_METHOD));
 175                         SSLv3_client_data.ssl_connect=ssl3_connect;
 176                         SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
 177                         init=0;
 178                         }
 179
 180                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
 181                 }
 182         return(&SSLv3_client_data);
 183         }
 184
 185 int ssl3_connect(SSL *s)
 186         {
 187         BUF_MEM *buf=NULL;
 188         unsigned long Time=time(NULL),l;
 189         long num1;
 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         for (;;)
 207                 {
 208                 state=s->state;
 209
 210                 switch(s->state)
 211                         {
 212                 case SSL_ST_RENEGOTIATE:
 213                         s->new_session=1;
 214                         s->state=SSL_ST_CONNECT;
 215                         s->ctx->stats.sess_connect_renegotiate++;
 216                         /* break */
 217                 case SSL_ST_BEFORE:
 218                 case SSL_ST_CONNECT:
 219                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 220                 case SSL_ST_OK|SSL_ST_CONNECT:
 221
 222                         s->server=0;
 223                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 224
 225                         if ((s->version & 0xff00 ) != 0x0300)
 226                                 {
 227                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
 228                                 ret = -1;
 229                                 goto end;
 230                                 }
 231
 232                         /* s->version=SSL3_VERSION; */
 233                         s->type=SSL_ST_CONNECT;
 234
 235                         if (s->init_buf == NULL)
 236                                 {
 237                                 if ((buf=BUF_MEM_new()) == NULL)
 238                                         {
 239                                         ret= -1;
 240                                         goto end;
 241                                         }
 242                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 243                                         {
 244                                         ret= -1;
 245                                         goto end;
 246                                         }
 247                                 s->init_buf=buf;
 248                                 buf=NULL;
 249                                 }
 250
 251                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 252
 253                         /* setup buffing BIO */
 254                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
 255
 256                         /* don't push the buffering BIO quite yet */
 257
 258                         ssl3_init_finished_mac(s);
 259
 260                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
 261                         s->ctx->stats.sess_connect++;
 262                         s->init_num=0;
 263                         break;
 264
 265                 case SSL3_ST_CW_CLNT_HELLO_A:
 266                 case SSL3_ST_CW_CLNT_HELLO_B:
 267
 268                         s->shutdown=0;
 269                         ret=ssl3_client_hello(s);
 270                         if (ret <= 0) goto end;
 271                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
 272                         s->init_num=0;
 273
 274                         /* turn on buffering for the next lot of output */
 275                         if (s->bbio != s->wbio)
 276                                 s->wbio=BIO_push(s->bbio,s->wbio);
 277
 278                         break;
 279
 280                 case SSL3_ST_CR_SRVR_HELLO_A:
 281                 case SSL3_ST_CR_SRVR_HELLO_B:
 282                         ret=ssl3_get_server_hello(s);
 283                         if (ret <= 0) goto end;
 284                         if (s->hit)
 285                                 s->state=SSL3_ST_CR_FINISHED_A;
 286                         else
 287                                 s->state=SSL3_ST_CR_CERT_A;
 288                         s->init_num=0;
 289                         break;
 290
 291                 case SSL3_ST_CR_CERT_A:
 292                 case SSL3_ST_CR_CERT_B:
 293                         /* Check if it is anon DH/ECDH */
 294                         if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
 295                                 {
 296                                 ret=ssl3_get_server_certificate(s);
 297                                 if (ret <= 0) goto end;
 298                                 }
 299                         else
 300                                 skip=1;
 301                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 302                         s->init_num=0;
 303                         break;
 304
 305                 case SSL3_ST_CR_KEY_EXCH_A:
 306                 case SSL3_ST_CR_KEY_EXCH_B:
 307                         ret=ssl3_get_key_exchange(s);
 308                         if (ret <= 0) goto end;
 309                         s->state=SSL3_ST_CR_CERT_REQ_A;
 310                         s->init_num=0;
 311
 312                         /* at this point we check that we have the
 313                          * required stuff from the server */
 314                         if (!ssl3_check_cert_and_algorithm(s))
 315                                 {
 316                                 ret= -1;
 317                                 goto end;
 318                                 }
 319                         break;
 320
 321                 case SSL3_ST_CR_CERT_REQ_A:
 322                 case SSL3_ST_CR_CERT_REQ_B:
 323                         ret=ssl3_get_certificate_request(s);
 324                         if (ret <= 0) goto end;
 325                         s->state=SSL3_ST_CR_SRVR_DONE_A;
 326                         s->init_num=0;
 327                         break;
 328
 329                 case SSL3_ST_CR_SRVR_DONE_A:
 330                 case SSL3_ST_CR_SRVR_DONE_B:
 331                         ret=ssl3_get_server_done(s);
 332                         if (ret <= 0) goto end;
 333                         if (s->s3->tmp.cert_req)
 334                                 s->state=SSL3_ST_CW_CERT_A;
 335                         else
 336                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
 337                         s->init_num=0;
 338
 339                         break;
 340
 341                 case SSL3_ST_CW_CERT_A:
 342                 case SSL3_ST_CW_CERT_B:
 343                 case SSL3_ST_CW_CERT_C:
 344                 case SSL3_ST_CW_CERT_D:
 345                         ret=ssl3_send_client_certificate(s);
 346                         if (ret <= 0) goto end;
 347                         s->state=SSL3_ST_CW_KEY_EXCH_A;
 348                         s->init_num=0;
 349                         break;
 350
 351                 case SSL3_ST_CW_KEY_EXCH_A:
 352                 case SSL3_ST_CW_KEY_EXCH_B:
 353                         ret=ssl3_send_client_key_exchange(s);
 354                         if (ret <= 0) goto end;
 355                         l=s->s3->tmp.new_cipher->algorithms;
 356                         /* EAY EAY EAY need to check for DH fix cert
 357                          * sent back */
 358                         /* For TLS, cert_req is set to 2, so a cert chain
 359                          * of nothing is sent, but no verify packet is sent */
 360                         /* XXX: For now, we do not support client
 361                          * authentication in ECDH cipher suites with
 362                          * ECDH (rather than ECDSA) certificates.
 363                          * We need to skip the certificate verify
 364                          * message when client's ECDH public key is sent
 365                          * inside the client certificate.
 366                          */
 367                         if (s->s3->tmp.cert_req == 1)
 368                                 {
 369                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
 370                                 }
 371                         else
 372                                 {
 373                                 s->state=SSL3_ST_CW_CHANGE_A;
 374                                 s->s3->change_cipher_spec=0;
 375                                 }
 376
 377                         s->init_num=0;
 378                         break;
 379
 380                 case SSL3_ST_CW_CERT_VRFY_A:
 381                 case SSL3_ST_CW_CERT_VRFY_B:
 382                         ret=ssl3_send_client_verify(s);
 383                         if (ret <= 0) goto end;
 384                         s->state=SSL3_ST_CW_CHANGE_A;
 385                         s->init_num=0;
 386                         s->s3->change_cipher_spec=0;
 387                         break;
 388
 389                 case SSL3_ST_CW_CHANGE_A:
 390                 case SSL3_ST_CW_CHANGE_B:
 391                         ret=ssl3_send_change_cipher_spec(s,
 392                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
 393                         if (ret <= 0) goto end;
 394                         s->state=SSL3_ST_CW_FINISHED_A;
 395                         s->init_num=0;
 396
 397                         s->session->cipher=s->s3->tmp.new_cipher;
 398                         if (s->s3->tmp.new_compression == NULL)
 399                                 s->session->compress_meth=0;
 400                         else
 401                                 s->session->compress_meth=
 402                                         s->s3->tmp.new_compression->id;
 403                         if (!s->method->ssl3_enc->setup_key_block(s))
 404                                 {
 405                                 ret= -1;
 406                                 goto end;
 407                                 }
 408
 409                         if (!s->method->ssl3_enc->change_cipher_state(s,
 410                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
 411                                 {
 412                                 ret= -1;
 413                                 goto end;
 414                                 }
 415
 416                         break;
 417
 418                 case SSL3_ST_CW_FINISHED_A:
 419                 case SSL3_ST_CW_FINISHED_B:
 420                         ret=ssl3_send_finished(s,
 421                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
 422                                 s->method->ssl3_enc->client_finished_label,
 423                                 s->method->ssl3_enc->client_finished_label_len);
 424                         if (ret <= 0) goto end;
 425                         s->state=SSL3_ST_CW_FLUSH;
 426
 427                         /* clear flags */
 428                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 429                         if (s->hit)
 430                                 {
 431                                 s->s3->tmp.next_state=SSL_ST_OK;
 432                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
 433                                         {
 434                                         s->state=SSL_ST_OK;
 435                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
 436                                         s->s3->delay_buf_pop_ret=0;
 437                                         }
 438                                 }
 439                         else
 440                                 {
 441                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
 442                                 }
 443                         s->init_num=0;
 444                         break;
 445
 446                 case SSL3_ST_CR_FINISHED_A:
 447                 case SSL3_ST_CR_FINISHED_B:
 448
 449                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 450                                 SSL3_ST_CR_FINISHED_B);
 451                         if (ret <= 0) goto end;
 452
 453                         if (s->hit)
 454                                 s->state=SSL3_ST_CW_CHANGE_A;
 455                         else
 456                                 s->state=SSL_ST_OK;
 457                         s->init_num=0;
 458                         break;
 459
 460                 case SSL3_ST_CW_FLUSH:
 461                         /* number of bytes to be flushed */
 462                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
 463                         if (num1 > 0)
 464                                 {
 465                                 s->rwstate=SSL_WRITING;
 466                                 num1=BIO_flush(s->wbio);
 467                                 if (num1 <= 0) { ret= -1; goto end; }
 468                                 s->rwstate=SSL_NOTHING;
 469                                 }
 470
 471                         s->state=s->s3->tmp.next_state;
 472                         break;
 473
 474                 case SSL_ST_OK:
 475                         /* clean a few things up */
 476                         ssl3_cleanup_key_block(s);
 477
 478                         if (s->init_buf != NULL)
 479                                 {
 480                                 BUF_MEM_free(s->init_buf);
 481                                 s->init_buf=NULL;
 482                                 }
 483
 484                         /* If we are not 'joining' the last two packets,
 485                          * remove the buffering now */
 486                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 487                                 ssl_free_wbio_buffer(s);
 488                         /* else do it later in ssl3_write */
 489
 490                         s->init_num=0;
 491                         s->new_session=0;
 492
 493                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 494                         if (s->hit) s->ctx->stats.sess_hit++;
 495
 496                         ret=1;
 497                         /* s->server=0; */
 498                         s->handshake_func=ssl3_connect;
 499                         s->ctx->stats.sess_connect_good++;
 500
 501                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 502
 503                         goto end;
 504                         /* break; */
 505
 506                 default:
 507                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 508                         ret= -1;
 509                         goto end;
 510                         /* break; */
 511                         }
 512
 513                 /* did we do anything */
 514                 if (!s->s3->tmp.reuse_message && !skip)
 515                         {
 516                         if (s->debug)
 517                                 {
 518                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 519                                         goto end;
 520                                 }
 521
 522                         if ((cb != NULL) && (s->state != state))
 523                                 {
 524                                 new_state=s->state;
 525                                 s->state=state;
 526                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 527                                 s->state=new_state;
 528                                 }
 529                         }
 530                 skip=0;
 531                 }
 532 end:
 533         s->in_handshake--;
 534         if (buf != NULL)
 535                 BUF_MEM_free(buf);
 536         if (cb != NULL)
 537                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 538         return(ret);
 539         }
 540
 541
 542 static int ssl3_client_hello(SSL *s)
 543         {
 544         unsigned char *buf;
 545         unsigned char *p,*d;
 546         int i,j;
 547         unsigned long Time,l;
 548         SSL_COMP *comp;
 549
 550         buf=(unsigned char *)s->init_buf->data;
 551         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 552                 {
 553                 if ((s->session == NULL) ||
 554                         (s->session->ssl_version != s->version) ||
 555                         (s->session->not_resumable))
 556                         {
 557                         if (!ssl_get_new_session(s,0))
 558                                 goto err;
 559                         }
 560                 /* else use the pre-loaded session */
 561
 562                 p=s->s3->client_random;
 563                 Time=time(NULL);                        /* Time */
 564                 l2n(Time,p);
 565                 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4);
 566
 567                 /* Do the message type and length last */
 568                 d=p= &(buf[4]);
 569
 570                 *(p++)=s->version>>8;
 571                 *(p++)=s->version&0xff;
 572                 s->client_version=s->version;
 573
 574                 /* Random stuff */
 575                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 576                 p+=SSL3_RANDOM_SIZE;
 577
 578                 /* Session ID */
 579                 if (s->new_session)
 580                         i=0;
 581                 else
 582                         i=s->session->session_id_length;
 583                 *(p++)=i;
 584                 if (i != 0)
 585                         {
 586                         if (i > (int)sizeof(s->session->session_id))
 587                                 {
 588                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
 589                                 goto err;
 590                                 }
 591                         memcpy(p,s->session->session_id,i);
 592                         p+=i;
 593                         }
 594
 595                 /* Ciphers supported */
 596                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
 597                 if (i == 0)
 598                         {
 599                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 600                         goto err;
 601                         }
 602                 s2n(i,p);
 603                 p+=i;
 604
 605                 /* COMPRESSION */
 606                 if (s->ctx->comp_methods == NULL)
 607                         j=0;
 608                 else
 609                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 610                 *(p++)=1+j;
 611                 for (i=0; i<j; i++)
 612                         {
 613                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 614                         *(p++)=comp->id;
 615                         }
 616                 *(p++)=0; /* Add the NULL method */
 617
 618                 l=(p-d);
 619                 d=buf;
 620                 *(d++)=SSL3_MT_CLIENT_HELLO;
 621                 l2n3(l,d);
 622
 623                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 624                 /* number of bytes to write */
 625                 s->init_num=p-buf;
 626                 s->init_off=0;
 627                 }
 628
 629         /* SSL3_ST_CW_CLNT_HELLO_B */
 630         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 631 err:
 632         return(-1);
 633         }
 634
 635 static int ssl3_get_server_hello(SSL *s)
 636         {
 637         STACK_OF(SSL_CIPHER) *sk;
 638         SSL_CIPHER *c;
 639         unsigned char *p,*d;
 640         int i,al,ok;
 641         unsigned int j;
 642         long n;
 643         SSL_COMP *comp;
 644
 645         n=ssl3_get_message(s,
 646                 SSL3_ST_CR_SRVR_HELLO_A,
 647                 SSL3_ST_CR_SRVR_HELLO_B,
 648                 SSL3_MT_SERVER_HELLO,
 649                 300, /* ?? */
 650                 &ok);
 651
 652         if (!ok) return((int)n);
 653         d=p=(unsigned char *)s->init_msg;
 654
 655         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 656                 {
 657                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 658                 s->version=(s->version&0xff00)|p[1];
 659                 al=SSL_AD_PROTOCOL_VERSION;
 660                 goto f_err;
 661                 }
 662         p+=2;
 663
 664         /* load the server hello data */
 665         /* load the server random */
 666         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 667         p+=SSL3_RANDOM_SIZE;
 668
 669         /* get the session-id */
 670         j= *(p++);
 671
 672         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
 673                 {
 674                 al=SSL_AD_ILLEGAL_PARAMETER;
 675                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
 676                 goto f_err;
 677                 }
 678
 679         if (j != 0 && j == s->session->session_id_length
 680             && memcmp(p,s->session->session_id,j) == 0)
 681             {
 682             if(s->sid_ctx_length != s->session->sid_ctx_length
 683                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 684                 {
 685                 /* actually a client application bug */
 686                 al=SSL_AD_ILLEGAL_PARAMETER;
 687                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 688                 goto f_err;
 689                 }
 690             s->hit=1;
 691             }
 692         else    /* a miss or crap from the other end */
 693                 {
 694                 /* If we were trying for session-id reuse, make a new
 695                  * SSL_SESSION so we don't stuff up other people */
 696                 s->hit=0;
 697                 if (s->session->session_id_length > 0)
 698                         {
 699                         if (!ssl_get_new_session(s,0))
 700                                 {
 701                                 al=SSL_AD_INTERNAL_ERROR;
 702                                 goto f_err;
 703                                 }
 704                         }
 705                 s->session->session_id_length=j;
 706                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 707                 }
 708         p+=j;
 709         c=ssl_get_cipher_by_char(s,p);
 710         if (c == NULL)
 711                 {
 712                 /* unknown cipher */
 713                 al=SSL_AD_ILLEGAL_PARAMETER;
 714                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 715                 goto f_err;
 716                 }
 717         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 718
 719         sk=ssl_get_ciphers_by_id(s);
 720         i=sk_SSL_CIPHER_find(sk,c);
 721         if (i < 0)
 722                 {
 723                 /* we did not say we would use this cipher */
 724                 al=SSL_AD_ILLEGAL_PARAMETER;
 725                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 726                 goto f_err;
 727                 }
 728
 729         /* Depending on the session caching (internal/external), the cipher
 730            and/or cipher_id values may not be set. Make sure that
 731            cipher_id is set and use it for comparison. */
 732         if (s->session->cipher)
 733                 s->session->cipher_id = s->session->cipher->id;
 734         if (s->hit && (s->session->cipher_id != c->id))
 735                 {
 736                 if (!(s->options &
 737                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 738                         {
 739                         al=SSL_AD_ILLEGAL_PARAMETER;
 740                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 741                         goto f_err;
 742                         }
 743                 }
 744         s->s3->tmp.new_cipher=c;
 745
 746         /* lets get the compression algorithm */
 747         /* COMPRESSION */
 748         j= *(p++);
 749         if (j == 0)
 750                 comp=NULL;
 751         else
 752                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
 753
 754         if ((j != 0) && (comp == NULL))
 755                 {
 756                 al=SSL_AD_ILLEGAL_PARAMETER;
 757                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 758                 goto f_err;
 759                 }
 760         else
 761                 {
 762                 s->s3->tmp.new_compression=comp;
 763                 }
 764
 765         if (p != (d+n))
 766                 {
 767                 /* wrong packet length */
 768                 al=SSL_AD_DECODE_ERROR;
 769                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
 770                 goto err;
 771                 }
 772
 773         return(1);
 774 f_err:
 775         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 776 err:
 777         return(-1);
 778         }
 779
 780 static int ssl3_get_server_certificate(SSL *s)
 781         {
 782         int al,i,ok,ret= -1;
 783         unsigned long n,nc,llen,l;
 784         X509 *x=NULL;
 785         const unsigned char *q,*p;
 786         unsigned char *d;
 787         STACK_OF(X509) *sk=NULL;
 788         SESS_CERT *sc;
 789         EVP_PKEY *pkey=NULL;
 790         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
 791
 792         n=ssl3_get_message(s,
 793                 SSL3_ST_CR_CERT_A,
 794                 SSL3_ST_CR_CERT_B,
 795                 -1,
 796                 s->max_cert_list,
 797                 &ok);
 798
 799         if (!ok) return((int)n);
 800
 801         if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
 802                 {
 803                 s->s3->tmp.reuse_message=1;
 804                 return(1);
 805                 }
 806
 807         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
 808                 {
 809                 al=SSL_AD_UNEXPECTED_MESSAGE;
 810                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
 811                 goto f_err;
 812                 }
 813         p=d=(unsigned char *)s->init_msg;
 814
 815         if ((sk=sk_X509_new_null()) == NULL)
 816                 {
 817                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 818                 goto err;
 819                 }
 820
 821         n2l3(p,llen);
 822         if (llen+3 != n)
 823                 {
 824                 al=SSL_AD_DECODE_ERROR;
 825                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
 826                 goto f_err;
 827                 }
 828         for (nc=0; nc<llen; )
 829                 {
 830                 n2l3(p,l);
 831                 if ((l+nc+3) > llen)
 832                         {
 833                         al=SSL_AD_DECODE_ERROR;
 834                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 835                         goto f_err;
 836                         }
 837
 838                 q=p;
 839                 x=d2i_X509(NULL,&q,l);
 840                 if (x == NULL)
 841                         {
 842                         al=SSL_AD_BAD_CERTIFICATE;
 843                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
 844                         goto f_err;
 845                         }
 846                 if (q != (p+l))
 847                         {
 848                         al=SSL_AD_DECODE_ERROR;
 849                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 850                         goto f_err;
 851                         }
 852                 if (!sk_X509_push(sk,x))
 853                         {
 854                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 855                         goto err;
 856                         }
 857                 x=NULL;
 858                 nc+=l+3;
 859                 p=q;
 860                 }
 861
 862         i=ssl_verify_cert_chain(s,sk);
 863         if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
 864 #ifndef OPENSSL_NO_KRB5
 865                 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
 866                 != (SSL_aKRB5|SSL_kKRB5)
 867 #endif /* OPENSSL_NO_KRB5 */
 868                 )
 869                 {
 870                 al=ssl_verify_alarm_type(s->verify_result);
 871                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
 872                 goto f_err;
 873                 }
 874         ERR_clear_error(); /* but we keep s->verify_result */
 875
 876         sc=ssl_sess_cert_new();
 877         if (sc == NULL) goto err;
 878
 879         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
 880         s->session->sess_cert=sc;
 881
 882         sc->cert_chain=sk;
 883         /* Inconsistency alert: cert_chain does include the peer's
 884          * certificate, which we don't include in s3_srvr.c */
 885         x=sk_X509_value(sk,0);
 886         sk=NULL;
 887         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
 888
 889         pkey=X509_get_pubkey(x);
 890
 891         /* VRS: allow null cert if auth == KRB5 */
 892         need_cert =     ((s->s3->tmp.new_cipher->algorithms
 893                          & (SSL_MKEY_MASK|SSL_AUTH_MASK))
 894                          == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
 895
 896 #ifdef KSSL_DEBUG
 897         printf("pkey,x = %p, %p\n", pkey,x);
 898         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
 899         printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
 900                 s->s3->tmp.new_cipher->algorithms, need_cert);
 901 #endif    /* KSSL_DEBUG */
 902
 903         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
 904                 {
 905                 x=NULL;
 906                 al=SSL3_AL_FATAL;
 907                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
 908                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
 909                 goto f_err;
 910                 }
 911
 912         i=ssl_cert_type(x,pkey);
 913         if (need_cert && i < 0)
 914                 {
 915                 x=NULL;
 916                 al=SSL3_AL_FATAL;
 917                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
 918                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
 919                 goto f_err;
 920                 }
 921
 922         if (need_cert)
 923                 {
 924                 sc->peer_cert_type=i;
 925                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 926                 /* Why would the following ever happen?
 927                  * We just created sc a couple of lines ago. */
 928                 if (sc->peer_pkeys[i].x509 != NULL)
 929                         X509_free(sc->peer_pkeys[i].x509);
 930                 sc->peer_pkeys[i].x509=x;
 931                 sc->peer_key= &(sc->peer_pkeys[i]);
 932
 933                 if (s->session->peer != NULL)
 934                         X509_free(s->session->peer);
 935                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 936                 s->session->peer=x;
 937                 }
 938         else
 939                 {
 940                 sc->peer_cert_type=i;
 941                 sc->peer_key= NULL;
 942
 943                 if (s->session->peer != NULL)
 944                         X509_free(s->session->peer);
 945                 s->session->peer=NULL;
 946                 }
 947         s->session->verify_result = s->verify_result;
 948
 949         x=NULL;
 950         ret=1;
 951
 952         if (0)
 953                 {
 954 f_err:
 955                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
 956                 }
 957 err:
 958         EVP_PKEY_free(pkey);
 959         X509_free(x);
 960         sk_X509_pop_free(sk,X509_free);
 961         return(ret);
 962         }
 963
 964 static int ssl3_get_key_exchange(SSL *s)
 965         {
 966 #ifndef OPENSSL_NO_RSA
 967         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
 968 #endif
 969         EVP_MD_CTX md_ctx;
 970         unsigned char *param,*p;
 971         int al,i,j,param_len,ok;
 972         long n,alg;
 973         EVP_PKEY *pkey=NULL;
 974 #ifndef OPENSSL_NO_RSA
 975         RSA *rsa=NULL;
 976 #endif
 977 #ifndef OPENSSL_NO_DH
 978         DH *dh=NULL;
 979 #endif
 980 #ifndef OPENSSL_NO_ECDH
 981         EC_KEY *ecdh = NULL;
 982         BN_CTX *bn_ctx = NULL;
 983         EC_POINT *srvr_ecpoint = NULL;
 984         int curve_nid = 0;
 985         int encoded_pt_len = 0;
 986 #endif
 987
 988         /* use same message size as in ssl3_get_certificate_request()
 989          * as ServerKeyExchange message may be skipped */
 990         n=ssl3_get_message(s,
 991                 SSL3_ST_CR_KEY_EXCH_A,
 992                 SSL3_ST_CR_KEY_EXCH_B,
 993                 -1,
 994                 s->max_cert_list,
 995                 &ok);
 996
 997         if (!ok) return((int)n);
 998
 999         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1000                 {
1001                 s->s3->tmp.reuse_message=1;
1002                 return(1);
1003                 }
1004
1005         param=p=(unsigned char *)s->init_msg;
1006
1007         if (s->session->sess_cert != NULL)
1008                 {
1009 #ifndef OPENSSL_NO_RSA
1010                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1011                         {
1012                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1013                         s->session->sess_cert->peer_rsa_tmp=NULL;
1014                         }
1015 #endif
1016 #ifndef OPENSSL_NO_DH
1017                 if (s->session->sess_cert->peer_dh_tmp)
1018                         {
1019                         DH_free(s->session->sess_cert->peer_dh_tmp);
1020                         s->session->sess_cert->peer_dh_tmp=NULL;
1021                         }
1022 #endif
1023 #ifndef OPENSSL_NO_ECDH
1024                 if (s->session->sess_cert->peer_ecdh_tmp)
1025                         {
1026                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1027                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1028                         }
1029 #endif
1030                 }
1031         else
1032                 {
1033                 s->session->sess_cert=ssl_sess_cert_new();
1034                 }
1035
1036         param_len=0;
1037         alg=s->s3->tmp.new_cipher->algorithms;
1038         EVP_MD_CTX_init(&md_ctx);
1039
1040 #ifndef OPENSSL_NO_RSA
1041         if (alg & SSL_kRSA)
1042                 {
1043                 if ((rsa=RSA_new()) == NULL)
1044                         {
1045                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1046                         goto err;
1047                         }
1048                 n2s(p,i);
1049                 param_len=i+2;
1050                 if (param_len > n)
1051                         {
1052                         al=SSL_AD_DECODE_ERROR;
1053                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1054                         goto f_err;
1055                         }
1056                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1057                         {
1058                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1059                         goto err;
1060                         }
1061                 p+=i;
1062
1063                 n2s(p,i);
1064                 param_len+=i+2;
1065                 if (param_len > n)
1066                         {
1067                         al=SSL_AD_DECODE_ERROR;
1068                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1069                         goto f_err;
1070                         }
1071                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1072                         {
1073                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1074                         goto err;
1075                         }
1076                 p+=i;
1077                 n-=param_len;
1078
1079                 /* this should be because we are using an export cipher */
1080                 if (alg & SSL_aRSA)
1081                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1082                 else
1083                         {
1084                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1085                         goto err;
1086                         }
1087                 s->session->sess_cert->peer_rsa_tmp=rsa;
1088                 rsa=NULL;
1089                 }
1090 #else /* OPENSSL_NO_RSA */
1091         if (0)
1092                 ;
1093 #endif
1094 #ifndef OPENSSL_NO_DH
1095         else if (alg & SSL_kEDH)
1096                 {
1097                 if ((dh=DH_new()) == NULL)
1098                         {
1099                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1100                         goto err;
1101                         }
1102                 n2s(p,i);
1103                 param_len=i+2;
1104                 if (param_len > n)
1105                         {
1106                         al=SSL_AD_DECODE_ERROR;
1107                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1108                         goto f_err;
1109                         }
1110                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1111                         {
1112                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1113                         goto err;
1114                         }
1115                 p+=i;
1116
1117                 n2s(p,i);
1118                 param_len+=i+2;
1119                 if (param_len > n)
1120                         {
1121                         al=SSL_AD_DECODE_ERROR;
1122                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1123                         goto f_err;
1124                         }
1125                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1126                         {
1127                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1128                         goto err;
1129                         }
1130                 p+=i;
1131
1132                 n2s(p,i);
1133                 param_len+=i+2;
1134                 if (param_len > n)
1135                         {
1136                         al=SSL_AD_DECODE_ERROR;
1137                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1138                         goto f_err;
1139                         }
1140                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1141                         {
1142                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1143                         goto err;
1144                         }
1145                 p+=i;
1146                 n-=param_len;
1147
1148 #ifndef OPENSSL_NO_RSA
1149                 if (alg & SSL_aRSA)
1150                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1151 #else
1152                 if (0)
1153                         ;
1154 #endif
1155 #ifndef OPENSSL_NO_DSA
1156                 else if (alg & SSL_aDSS)
1157                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1158 #endif
1159                 /* else anonymous DH, so no certificate or pkey. */
1160
1161                 s->session->sess_cert->peer_dh_tmp=dh;
1162                 dh=NULL;
1163                 }
1164         else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1165                 {
1166                 al=SSL_AD_ILLEGAL_PARAMETER;
1167                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1168                 goto f_err;
1169                 }
1170 #endif /* !OPENSSL_NO_DH */
1171
1172 #ifndef OPENSSL_NO_ECDH
1173         else if (alg & SSL_kECDHE)
1174                 {
1175                 if ((ecdh=EC_KEY_new()) == NULL)
1176                         {
1177                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1178                         goto err;
1179                         }
1180
1181                 /* Extract elliptic curve parameters and the
1182                  * server's ephemeral ECDH public key.
1183                  * Keep accumulating lengths of various components in
1184                  * param_len and make sure it never exceeds n.
1185                  */
1186
1187                 /* XXX: For now we only support named (not generic) curves
1188                  * and the ECParameters in this case is just two bytes.
1189                  */
1190                 param_len=2;
1191                 if ((param_len > n) ||
1192                     (*p != NAMED_CURVE_TYPE) ||
1193                     ((curve_nid = curve_id2nid(*(p + 1))) == 0))
1194                         {
1195                         al=SSL_AD_INTERNAL_ERROR;
1196                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1197                         goto f_err;
1198                         }
1199
1200                 if (!(ecdh->group=EC_GROUP_new_by_nid(curve_nid)))
1201                         {
1202                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1203                         goto err;
1204                         }
1205
1206                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1207                     (EC_GROUP_get_degree(ecdh->group) > 163))
1208                         {
1209                         al=SSL_AD_EXPORT_RESTRICTION;
1210                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1211                         goto f_err;
1212                         }
1213
1214                 p+=2;
1215
1216                 /* Next, get the encoded ECPoint */
1217                 if (((srvr_ecpoint = EC_POINT_new(ecdh->group)) == NULL) ||
1218                     ((bn_ctx = BN_CTX_new()) == NULL))
1219                         {
1220                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1221                         goto err;
1222                         }
1223
1224                 encoded_pt_len = *p;  /* length of encoded point */
1225                 p+=1;
1226                 param_len += (1 + encoded_pt_len);
1227                 if ((param_len > n) ||
1228                     (EC_POINT_oct2point(ecdh->group, srvr_ecpoint,
1229                         p, encoded_pt_len, bn_ctx) == 0))
1230                         {
1231                         al=SSL_AD_DECODE_ERROR;
1232                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1233                         goto f_err;
1234                         }
1235
1236                 n-=param_len;
1237                 p+=encoded_pt_len;
1238
1239                 /* The ECC/TLS specification does not mention
1240                  * the use of DSA to sign ECParameters in the server
1241                  * key exchange message. We do support RSA and ECDSA.
1242                  */
1243                 if (0) ;
1244 #ifndef OPENSSL_NO_RSA
1245                 else if (alg & SSL_aRSA)
1246                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1247 #endif
1248 #ifndef OPENSSL_NO_ECDSA
1249                 else if (alg & SSL_aECDSA)
1250                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1251 #endif
1252                 /* else anonymous ECDH, so no certificate or pkey. */
1253                 ecdh->pub_key = srvr_ecpoint;
1254                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1255                 ecdh=NULL;
1256                 BN_CTX_free(bn_ctx);
1257                 srvr_ecpoint = NULL;
1258                 }
1259         else if (alg & SSL_kECDH)
1260                 {
1261                 al=SSL_AD_UNEXPECTED_MESSAGE;
1262                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1263                 goto f_err;
1264                 }
1265 #endif /* !OPENSSL_NO_ECDH */
1266         if (alg & SSL_aFZA)
1267                 {
1268                 al=SSL_AD_HANDSHAKE_FAILURE;
1269                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1270                 goto f_err;
1271                 }
1272
1273
1274         /* p points to the next byte, there are 'n' bytes left */
1275
1276         /* if it was signed, check the signature */
1277         if (pkey != NULL)
1278                 {
1279                 n2s(p,i);
1280                 n-=2;
1281                 j=EVP_PKEY_size(pkey);
1282
1283                 if ((i != n) || (n > j) || (n <= 0))
1284                         {
1285                         /* wrong packet length */
1286                         al=SSL_AD_DECODE_ERROR;
1287                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1288                         goto f_err;
1289                         }
1290
1291 #ifndef OPENSSL_NO_RSA
1292                 if (pkey->type == EVP_PKEY_RSA)
1293                         {
1294                         int num;
1295
1296                         j=0;
1297                         q=md_buf;
1298                         for (num=2; num > 0; num--)
1299                                 {
1300                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1301                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1302                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1303                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1304                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1305                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1306                                 q+=i;
1307                                 j+=i;
1308                                 }
1309                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1310                                                                 pkey->pkey.rsa);
1311                         if (i < 0)
1312                                 {
1313                                 al=SSL_AD_DECRYPT_ERROR;
1314                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1315                                 goto f_err;
1316                                 }
1317                         if (i == 0)
1318                                 {
1319                                 /* bad signature */
1320                                 al=SSL_AD_DECRYPT_ERROR;
1321                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1322                                 goto f_err;
1323                                 }
1324                         }
1325                 else
1326 #endif
1327 #ifndef OPENSSL_NO_DSA
1328                         if (pkey->type == EVP_PKEY_DSA)
1329                         {
1330                         /* lets do DSS */
1331                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1332                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1333                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1334                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1335                         if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1336                                 {
1337                                 /* bad signature */
1338                                 al=SSL_AD_DECRYPT_ERROR;
1339                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1340                                 goto f_err;
1341                                 }
1342                         }
1343                 else
1344 #endif
1345 #ifndef OPENSSL_NO_ECDSA
1346                         if (pkey->type == EVP_PKEY_EC)
1347                         {
1348                         /* let's do ECDSA */
1349                         EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1350                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1351                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1352                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1353                         if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1354                                 {
1355                                 /* bad signature */
1356                                 al=SSL_AD_DECRYPT_ERROR;
1357                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1358                                 goto f_err;
1359                                 }
1360                         }
1361                 else
1362 #endif
1363                         {
1364                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1365                         goto err;
1366                         }
1367                 }
1368         else
1369                 {
1370                 /* still data left over */
1371                 if (!(alg & SSL_aNULL))
1372                         {
1373                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1374                         goto err;
1375                         }
1376                 if (n != 0)
1377                         {
1378                         al=SSL_AD_DECODE_ERROR;
1379                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1380                         goto f_err;
1381                         }
1382                 }
1383         EVP_PKEY_free(pkey);
1384         EVP_MD_CTX_cleanup(&md_ctx);
1385         return(1);
1386 f_err:
1387         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1388 err:
1389         EVP_PKEY_free(pkey);
1390 #ifndef OPENSSL_NO_RSA
1391         if (rsa != NULL)
1392                 RSA_free(rsa);
1393 #endif
1394 #ifndef OPENSSL_NO_DH
1395         if (dh != NULL)
1396                 DH_free(dh);
1397 #endif
1398 #ifndef OPENSSL_NO_ECDH
1399         BN_CTX_free(bn_ctx);
1400         EC_POINT_free(srvr_ecpoint);
1401         if (ecdh != NULL)
1402                 EC_KEY_free(ecdh);
1403 #endif
1404         EVP_MD_CTX_cleanup(&md_ctx);
1405         return(-1);
1406         }
1407
1408 static int ssl3_get_certificate_request(SSL *s)
1409         {
1410         int ok,ret=0;
1411         unsigned long n,nc,l;
1412         unsigned int llen,ctype_num,i;
1413         X509_NAME *xn=NULL;
1414         const unsigned char *p,*q;
1415         unsigned char *d;
1416         STACK_OF(X509_NAME) *ca_sk=NULL;
1417
1418         n=ssl3_get_message(s,
1419                 SSL3_ST_CR_CERT_REQ_A,
1420                 SSL3_ST_CR_CERT_REQ_B,
1421                 -1,
1422                 s->max_cert_list,
1423                 &ok);
1424
1425         if (!ok) return((int)n);
1426
1427         s->s3->tmp.cert_req=0;
1428
1429         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1430                 {
1431                 s->s3->tmp.reuse_message=1;
1432                 return(1);
1433                 }
1434
1435         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1436                 {
1437                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1438                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1439                 goto err;
1440                 }
1441
1442         /* TLS does not like anon-DH with client cert */
1443         if (s->version > SSL3_VERSION)
1444                 {
1445                 l=s->s3->tmp.new_cipher->algorithms;
1446                 if (l & SSL_aNULL)
1447                         {
1448                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1449                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1450                         goto err;
1451                         }
1452                 }
1453
1454         p=d=(unsigned char *)s->init_msg;
1455
1456         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1457                 {
1458                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1459                 goto err;
1460                 }
1461
1462         /* get the certificate types */
1463         ctype_num= *(p++);
1464         if (ctype_num > SSL3_CT_NUMBER)
1465                 ctype_num=SSL3_CT_NUMBER;
1466         for (i=0; i<ctype_num; i++)
1467                 s->s3->tmp.ctype[i]= p[i];
1468         p+=ctype_num;
1469
1470         /* get the CA RDNs */
1471         n2s(p,llen);
1472 #if 0
1473 {
1474 FILE *out;
1475 out=fopen("/tmp/vsign.der","w");
1476 fwrite(p,1,llen,out);
1477 fclose(out);
1478 }
1479 #endif
1480
1481         if ((llen+ctype_num+2+1) != n)
1482                 {
1483                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1484                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1485                 goto err;
1486                 }
1487
1488         for (nc=0; nc<llen; )
1489                 {
1490                 n2s(p,l);
1491                 if ((l+nc+2) > llen)
1492                         {
1493                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1494                                 goto cont; /* netscape bugs */
1495                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1496                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1497                         goto err;
1498                         }
1499
1500                 q=p;
1501
1502                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1503                         {
1504                         /* If netscape tolerance is on, ignore errors */
1505                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1506                                 goto cont;
1507                         else
1508                                 {
1509                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1510                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1511                                 goto err;
1512                                 }
1513                         }
1514
1515                 if (q != (p+l))
1516                         {
1517                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1518                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1519                         goto err;
1520                         }
1521                 if (!sk_X509_NAME_push(ca_sk,xn))
1522                         {
1523                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1524                         goto err;
1525                         }
1526
1527                 p+=l;
1528                 nc+=l+2;
1529                 }
1530
1531         if (0)
1532                 {
1533 cont:
1534                 ERR_clear_error();
1535                 }
1536
1537         /* we should setup a certificate to return.... */
1538         s->s3->tmp.cert_req=1;
1539         s->s3->tmp.ctype_num=ctype_num;
1540         if (s->s3->tmp.ca_names != NULL)
1541                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1542         s->s3->tmp.ca_names=ca_sk;
1543         ca_sk=NULL;
1544
1545         ret=1;
1546 err:
1547         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1548         return(ret);
1549         }
1550
1551 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1552         {
1553         return(X509_NAME_cmp(*a,*b));
1554         }
1555
1556 static int ssl3_get_server_done(SSL *s)
1557         {
1558         int ok,ret=0;
1559         long n;
1560
1561         n=ssl3_get_message(s,
1562                 SSL3_ST_CR_SRVR_DONE_A,
1563                 SSL3_ST_CR_SRVR_DONE_B,
1564                 SSL3_MT_SERVER_DONE,
1565                 30, /* should be very small, like 0 :-) */
1566                 &ok);
1567
1568         if (!ok) return((int)n);
1569         if (n > 0)
1570                 {
1571                 /* should contain no data */
1572                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1573                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1574                 return -1;
1575                 }
1576         ret=1;
1577         return(ret);
1578         }
1579
1580
1581 static const int KDF1_SHA1_len = 20;
1582 static void *KDF1_SHA1(const void *in, size_t inlen, void *out, size_t *outlen)
1583         {
1584 #ifndef OPENSSL_NO_SHA
1585         if (*outlen < SHA_DIGEST_LENGTH)
1586                 return NULL;
1587         else
1588                 *outlen = SHA_DIGEST_LENGTH;
1589         return SHA1(in, inlen, out);
1590 #else
1591         return NULL;
1592 #endif
1593         }
1594
1595 static int ssl3_send_client_key_exchange(SSL *s)
1596         {
1597         unsigned char *p,*d;
1598         int n;
1599         unsigned long l;
1600 #ifndef OPENSSL_NO_RSA
1601         unsigned char *q;
1602         EVP_PKEY *pkey=NULL;
1603 #endif
1604 #ifndef OPENSSL_NO_KRB5
1605         KSSL_ERR kssl_err;
1606 #endif /* OPENSSL_NO_KRB5 */
1607 #ifndef OPENSSL_NO_ECDH
1608         EC_KEY *clnt_ecdh = NULL;
1609         EC_POINT *srvr_ecpoint = NULL;
1610         EVP_PKEY *srvr_pub_pkey = NULL;
1611         unsigned char *encodedPoint = NULL;
1612         int encoded_pt_len = 0;
1613         BN_CTX * bn_ctx = NULL;
1614 #endif
1615
1616         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1617                 {
1618                 d=(unsigned char *)s->init_buf->data;
1619                 p= &(d[4]);
1620
1621                 l=s->s3->tmp.new_cipher->algorithms;
1622
1623                 /* Fool emacs indentation */
1624                 if (0) {}
1625 #ifndef OPENSSL_NO_RSA
1626                 else if (l & SSL_kRSA)
1627                         {
1628                         RSA *rsa;
1629                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1630
1631                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
1632                                 rsa=s->session->sess_cert->peer_rsa_tmp;
1633                         else
1634                                 {
1635                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1636                                 if ((pkey == NULL) ||
1637                                         (pkey->type != EVP_PKEY_RSA) ||
1638                                         (pkey->pkey.rsa == NULL))
1639                                         {
1640                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1641                                         goto err;
1642                                         }
1643                                 rsa=pkey->pkey.rsa;
1644                                 EVP_PKEY_free(pkey);
1645                                 }
1646
1647                         tmp_buf[0]=s->client_version>>8;
1648                         tmp_buf[1]=s->client_version&0xff;
1649                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1650                                         goto err;
1651
1652                         s->session->master_key_length=sizeof tmp_buf;
1653
1654                         q=p;
1655                         /* Fix buf for TLS and beyond */
1656                         if (s->version > SSL3_VERSION)
1657                                 p+=2;
1658                         n=RSA_public_encrypt(sizeof tmp_buf,
1659                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1660 #ifdef PKCS1_CHECK
1661                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1662                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1663 #endif
1664                         if (n <= 0)
1665                                 {
1666                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1667                                 goto err;
1668                                 }
1669
1670                         /* Fix buf for TLS and beyond */
1671                         if (s->version > SSL3_VERSION)
1672                                 {
1673                                 s2n(n,q);
1674                                 n+=2;
1675                                 }
1676
1677                         s->session->master_key_length=
1678                                 s->method->ssl3_enc->generate_master_secret(s,
1679                                         s->session->master_key,
1680                                         tmp_buf,sizeof tmp_buf);
1681                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1682                         }
1683 #endif
1684 #ifndef OPENSSL_NO_KRB5
1685                 else if (l & SSL_kKRB5)
1686                         {
1687                         krb5_error_code krb5rc;
1688                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
1689                         /*  krb5_data   krb5_ap_req;  */
1690                         krb5_data       *enc_ticket;
1691                         krb5_data       authenticator, *authp = NULL;
1692                         EVP_CIPHER_CTX  ciph_ctx;
1693                         EVP_CIPHER      *enc = NULL;
1694                         unsigned char   iv[EVP_MAX_IV_LENGTH];
1695                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1696                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
1697                                                 + EVP_MAX_IV_LENGTH];
1698                         int             padl, outl = sizeof(epms);
1699
1700                         EVP_CIPHER_CTX_init(&ciph_ctx);
1701
1702 #ifdef KSSL_DEBUG
1703                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1704                                 l, SSL_kKRB5);
1705 #endif  /* KSSL_DEBUG */
1706
1707                         authp = NULL;
1708 #ifdef KRB5SENDAUTH
1709                         if (KRB5SENDAUTH)  authp = &authenticator;
1710 #endif  /* KRB5SENDAUTH */
1711
1712                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1713                                 &kssl_err);
1714                         enc = kssl_map_enc(kssl_ctx->enctype);
1715                         if (enc == NULL)
1716                             goto err;
1717 #ifdef KSSL_DEBUG
1718                         {
1719                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
1720                         if (krb5rc && kssl_err.text)
1721                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1722                         }
1723 #endif  /* KSSL_DEBUG */
1724
1725                         if (krb5rc)
1726                                 {
1727                                 ssl3_send_alert(s,SSL3_AL_FATAL,
1728                                                 SSL_AD_HANDSHAKE_FAILURE);
1729                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1730                                                 kssl_err.reason);
1731                                 goto err;
1732                                 }
1733
1734                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
1735                         **  in place of RFC 2712 KerberosWrapper, as in:
1736                         **
1737                         **  Send ticket (copy to *p, set n = length)
1738                         **  n = krb5_ap_req.length;
1739                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1740                         **  if (krb5_ap_req.data)
1741                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1742                         **
1743                         **  Now using real RFC 2712 KerberosWrapper
1744                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1745                         **  Note: 2712 "opaque" types are here replaced
1746                         **  with a 2-byte length followed by the value.
1747                         **  Example:
1748                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1749                         **  Where "xx xx" = length bytes.  Shown here with
1750                         **  optional authenticator omitted.
1751                         */
1752
1753                         /*  KerberosWrapper.Ticket              */
1754                         s2n(enc_ticket->length,p);
1755                         memcpy(p, enc_ticket->data, enc_ticket->length);
1756                         p+= enc_ticket->length;
1757                         n = enc_ticket->length + 2;
1758
1759                         /*  KerberosWrapper.Authenticator       */
1760                         if (authp  &&  authp->length)
1761                                 {
1762                                 s2n(authp->length,p);
1763                                 memcpy(p, authp->data, authp->length);
1764                                 p+= authp->length;
1765                                 n+= authp->length + 2;
1766
1767                                 free(authp->data);
1768                                 authp->data = NULL;
1769                                 authp->length = 0;
1770                                 }
1771                         else
1772                                 {
1773                                 s2n(0,p);/*  null authenticator length  */
1774                                 n+=2;
1775                                 }
1776
1777                         if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1778                             goto err;
1779
1780                         /*  20010420 VRS.  Tried it this way; failed.
1781                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1782                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1783                         **                              kssl_ctx->length);
1784                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1785                         */
1786
1787                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1788                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1789                                 kssl_ctx->key,iv);
1790                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1791                                 sizeof tmp_buf);
1792                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1793                         outl += padl;
1794                         if (outl > sizeof epms)
1795                                 {
1796                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1797                                 goto err;
1798                                 }
1799                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1800
1801                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
1802                         s2n(outl,p);
1803                         memcpy(p, epms, outl);
1804                         p+=outl;
1805                         n+=outl + 2;
1806
1807                         s->session->master_key_length=
1808                                 s->method->ssl3_enc->generate_master_secret(s,
1809                                         s->session->master_key,
1810                                         tmp_buf, sizeof tmp_buf);
1811
1812                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1813                         OPENSSL_cleanse(epms, outl);
1814                         }
1815 #endif
1816 #ifndef OPENSSL_NO_DH
1817                 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1818                         {
1819                         DH *dh_srvr,*dh_clnt;
1820
1821                         if (s->session->sess_cert->peer_dh_tmp != NULL)
1822                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1823                         else
1824                                 {
1825                                 /* we get them from the cert */
1826                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1827                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1828                                 goto err;
1829                                 }
1830
1831                         /* generate a new random key */
1832                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1833                                 {
1834                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1835                                 goto err;
1836                                 }
1837                         if (!DH_generate_key(dh_clnt))
1838                                 {
1839                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1840                                 goto err;
1841                                 }
1842
1843                         /* use the 'p' output buffer for the DH key, but
1844                          * make sure to clear it out afterwards */
1845
1846                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1847
1848                         if (n <= 0)
1849                                 {
1850                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1851                                 goto err;
1852                                 }
1853
1854                         /* generate master key from the result */
1855                         s->session->master_key_length=
1856                                 s->method->ssl3_enc->generate_master_secret(s,
1857                                         s->session->master_key,p,n);
1858                         /* clean up */
1859                         memset(p,0,n);
1860
1861                         /* send off the data */
1862                         n=BN_num_bytes(dh_clnt->pub_key);
1863                         s2n(n,p);
1864                         BN_bn2bin(dh_clnt->pub_key,p);
1865                         n+=2;
1866
1867                         DH_free(dh_clnt);
1868
1869                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
1870                         }
1871 #endif
1872
1873 #ifndef OPENSSL_NO_ECDH
1874                 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
1875                         {
1876                         EC_GROUP *srvr_group = NULL;
1877                         int ecdh_clnt_cert = 0;
1878                         int field_size = 0;
1879
1880                         /* Did we send out the client's
1881                          * ECDH share for use in premaster
1882                          * computation as part of client certificate?
1883                          * If so, set ecdh_clnt_cert to 1.
1884                          */
1885                         if ((l & SSL_kECDH) && (s->cert != NULL))
1886                                 {
1887                                 /* XXX: For now, we do not support client
1888                                  * authentication using ECDH certificates.
1889                                  * To add such support, one needs to add
1890                                  * code that checks for appropriate
1891                                  * conditions and sets ecdh_clnt_cert to 1.
1892                                  * For example, the cert have an ECC
1893                                  * key on the same curve as the server's
1894                                  * and the key should be authorized for
1895                                  * key agreement.
1896                                  *
1897                                  * One also needs to add code in ssl3_connect
1898                                  * to skip sending the certificate verify
1899                                  * message.
1900                                  *
1901                                  * if ((s->cert->key->privatekey != NULL) &&
1902                                  *     (s->cert->key->privatekey->type ==
1903                                  *      EVP_PKEY_EC) && ...)
1904                                  * ecdh_clnt_cert = 1;
1905                                  */
1906                                 }
1907
1908                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1909                                 {
1910                                 srvr_group = s->session->sess_cert-> \
1911                                     peer_ecdh_tmp->group;
1912                                 srvr_ecpoint = s->session->sess_cert-> \
1913                                     peer_ecdh_tmp->pub_key;
1914                                 }
1915                         else
1916                                 {
1917                                 /* Get the Server Public Key from Cert */
1918                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1919                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1920                                 if ((srvr_pub_pkey == NULL) ||
1921                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1922                                     (srvr_pub_pkey->pkey.eckey == NULL))
1923                                         {
1924                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1925                                             ERR_R_INTERNAL_ERROR);
1926                                         goto err;
1927                                         }
1928
1929                                 srvr_group = srvr_pub_pkey->pkey.eckey->group;
1930                                 srvr_ecpoint =
1931                                     srvr_pub_pkey->pkey.eckey->pub_key;
1932                                 }
1933
1934                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1935                                 {
1936                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1937                                     ERR_R_INTERNAL_ERROR);
1938                                 goto err;
1939                                 }
1940
1941                         if ((clnt_ecdh=EC_KEY_new()) == NULL)
1942                                 {
1943                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1944                                 goto err;
1945                                 }
1946
1947                         clnt_ecdh->group = srvr_group;
1948                         if (ecdh_clnt_cert)
1949                                 {
1950                                 /* Reuse key info from our certificate
1951                                  * We only need our private key to perform
1952                                  * the ECDH computation.
1953                                  */
1954                                 clnt_ecdh->priv_key = BN_dup(s->cert->key-> \
1955                                     privatekey->pkey.eckey->priv_key);
1956                                 }
1957                         else
1958                                 {
1959                                 /* Generate a new ECDH key pair */
1960                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
1961                                         {
1962                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1963                                         goto err;
1964                                         }
1965                                 }
1966
1967                         /* use the 'p' output buffer for the ECDH key, but
1968                          * make sure to clear it out afterwards
1969                          */
1970
1971                         field_size = EC_GROUP_get_degree(clnt_ecdh->group);
1972                         if (field_size <= 0)
1973                                 {
1974                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1975                                        ERR_R_ECDH_LIB);
1976                                 goto err;
1977                                 }
1978                         /* If field size is not more than 24 octets, then use SHA-1 hash of result;
1979                          * otherwise, use result (see section 4.8 of draft-ietf-tls-ecc-03.txt;
1980                          * this is new with this version of the Internet Draft).
1981                          */
1982                         if (field_size <= 24 * 8)
1983                                 n=ECDH_compute_key(p, KDF1_SHA1_len, srvr_ecpoint, clnt_ecdh, KDF1_SHA1);
1984                         else
1985                                 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
1986                         if (n <= 0)
1987                                 {
1988                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1989                                        ERR_R_ECDH_LIB);
1990                                 goto err;
1991                                 }
1992
1993                         /* generate master key from the result */
1994                         s->session->master_key_length = s->method->ssl3_enc \
1995                             -> generate_master_secret(s,
1996                                 s->session->master_key,
1997                                 p, n);
1998
1999                         memset(p, 0, n); /* clean up */
2000
2001                         if (ecdh_clnt_cert)
2002                                 {
2003                                 /* Send empty client key exch message */
2004                                 n = 0;
2005                                 }
2006                         else
2007                                 {
2008                                 /* First check the size of encoding and
2009                                  * allocate memory accordingly.
2010                                  */
2011                                 encoded_pt_len =
2012                                     EC_POINT_point2oct(clnt_ecdh->group,
2013                                         clnt_ecdh->pub_key,
2014                                         POINT_CONVERSION_UNCOMPRESSED,
2015                                         NULL, 0, NULL);
2016
2017                                 encodedPoint = (unsigned char *)
2018                                     OPENSSL_malloc(encoded_pt_len *
2019                                         sizeof(unsigned char));
2020                                 bn_ctx = BN_CTX_new();
2021                                 if ((encodedPoint == NULL) ||
2022                                     (bn_ctx == NULL))
2023                                         {
2024                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2025                                         goto err;
2026                                         }
2027
2028                                 /* Encode the public key */
2029                                 n = EC_POINT_point2oct(clnt_ecdh->group,
2030                                     clnt_ecdh->pub_key,
2031                                     POINT_CONVERSION_UNCOMPRESSED,
2032                                     encodedPoint, encoded_pt_len, bn_ctx);
2033
2034                                 *p = n; /* length of encoded point */
2035                                 /* Encoded point will be copied here */
2036                                 p += 1;
2037                                 /* copy the point */
2038                                 memcpy((unsigned char *)p, encodedPoint, n);
2039                                 /* increment n to account for length field */
2040                                 n += 1;
2041                                 }
2042
2043                         /* Free allocated memory */
2044                         BN_CTX_free(bn_ctx);
2045                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2046                         if (clnt_ecdh != NULL)
2047                                 {
2048                                  /* group is shared */
2049                                  clnt_ecdh->group = NULL;
2050                                  EC_KEY_free(clnt_ecdh);
2051                                 }
2052                         EVP_PKEY_free(srvr_pub_pkey);
2053                         }
2054 #endif /* !OPENSSL_NO_ECDH */
2055                 else
2056                         {
2057                         ssl3_send_alert(s, SSL3_AL_FATAL,
2058                             SSL_AD_HANDSHAKE_FAILURE);
2059                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2060                             ERR_R_INTERNAL_ERROR);
2061                         goto err;
2062                         }
2063
2064                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2065                 l2n3(n,d);
2066
2067                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2068                 /* number of bytes to write */
2069                 s->init_num=n+4;
2070                 s->init_off=0;
2071                 }
2072
2073         /* SSL3_ST_CW_KEY_EXCH_B */
2074         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2075 err:
2076 #ifndef OPENSSL_NO_ECDH
2077         BN_CTX_free(bn_ctx);
2078         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2079         if (clnt_ecdh != NULL)
2080                 {
2081                 /* group is shared */
2082                 clnt_ecdh->group = NULL;
2083                 EC_KEY_free(clnt_ecdh);
2084                 }
2085         EVP_PKEY_free(srvr_pub_pkey);
2086 #endif
2087         return(-1);
2088         }
2089
2090 static int ssl3_send_client_verify(SSL *s)
2091         {
2092         unsigned char *p,*d;
2093         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2094         EVP_PKEY *pkey;
2095 #ifndef OPENSSL_NO_RSA
2096         unsigned u=0;
2097 #endif
2098         unsigned long n;
2099 #ifndef OPENSSL_NO_DSA
2100         int j;
2101 #endif
2102
2103         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2104                 {
2105                 d=(unsigned char *)s->init_buf->data;
2106                 p= &(d[4]);
2107                 pkey=s->cert->key->privatekey;
2108
2109                 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2110                         &(data[MD5_DIGEST_LENGTH]));
2111
2112 #ifndef OPENSSL_NO_RSA
2113                 if (pkey->type == EVP_PKEY_RSA)
2114                         {
2115                         s->method->ssl3_enc->cert_verify_mac(s,
2116                                 &(s->s3->finish_dgst1),&(data[0]));
2117                         if (RSA_sign(NID_md5_sha1, data,
2118                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2119                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2120                                 {
2121                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2122                                 goto err;
2123                                 }
2124                         s2n(u,p);
2125                         n=u+2;
2126                         }
2127                 else
2128 #endif
2129 #ifndef OPENSSL_NO_DSA
2130                         if (pkey->type == EVP_PKEY_DSA)
2131                         {
2132                         if (!DSA_sign(pkey->save_type,
2133                                 &(data[MD5_DIGEST_LENGTH]),
2134                                 SHA_DIGEST_LENGTH,&(p[2]),
2135                                 (unsigned int *)&j,pkey->pkey.dsa))
2136                                 {
2137                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2138                                 goto err;
2139                                 }
2140                         s2n(j,p);
2141                         n=j+2;
2142                         }
2143                 else
2144 #endif
2145 #ifndef OPENSSL_NO_ECDSA
2146                         if (pkey->type == EVP_PKEY_EC)
2147                         {
2148                         if (!ECDSA_sign(pkey->save_type,
2149                                 &(data[MD5_DIGEST_LENGTH]),
2150                                 SHA_DIGEST_LENGTH,&(p[2]),
2151                                 (unsigned int *)&j,pkey->pkey.eckey))
2152                                 {
2153                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2154                                     ERR_R_ECDSA_LIB);
2155                                 goto err;
2156                                 }
2157                         s2n(j,p);
2158                         n=j+2;
2159                         }
2160                 else
2161 #endif
2162                         {
2163                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2164                         goto err;
2165                         }
2166                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2167                 l2n3(n,d);
2168
2169                 s->state=SSL3_ST_CW_CERT_VRFY_B;
2170                 s->init_num=(int)n+4;
2171                 s->init_off=0;
2172                 }
2173         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2174 err:
2175         return(-1);
2176         }
2177
2178 static int ssl3_send_client_certificate(SSL *s)
2179         {
2180         X509 *x509=NULL;
2181         EVP_PKEY *pkey=NULL;
2182         int i;
2183         unsigned long l;
2184
2185         if (s->state == SSL3_ST_CW_CERT_A)
2186                 {
2187                 if ((s->cert == NULL) ||
2188                         (s->cert->key->x509 == NULL) ||
2189                         (s->cert->key->privatekey == NULL))
2190                         s->state=SSL3_ST_CW_CERT_B;
2191                 else
2192                         s->state=SSL3_ST_CW_CERT_C;
2193                 }
2194
2195         /* We need to get a client cert */
2196         if (s->state == SSL3_ST_CW_CERT_B)
2197                 {
2198                 /* If we get an error, we need to
2199                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2200                  * We then get retied later */
2201                 i=0;
2202                 if (s->ctx->client_cert_cb != NULL)
2203                         i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2204                 if (i < 0)
2205                         {
2206                         s->rwstate=SSL_X509_LOOKUP;
2207                         return(-1);
2208                         }
2209                 s->rwstate=SSL_NOTHING;
2210                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2211                         {
2212                         s->state=SSL3_ST_CW_CERT_B;
2213                         if (    !SSL_use_certificate(s,x509) ||
2214                                 !SSL_use_PrivateKey(s,pkey))
2215                                 i=0;
2216                         }
2217                 else if (i == 1)
2218                         {
2219                         i=0;
2220                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2221                         }
2222
2223                 if (x509 != NULL) X509_free(x509);
2224                 if (pkey != NULL) EVP_PKEY_free(pkey);
2225                 if (i == 0)
2226                         {
2227                         if (s->version == SSL3_VERSION)
2228                                 {
2229                                 s->s3->tmp.cert_req=0;
2230                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2231                                 return(1);
2232                                 }
2233                         else
2234                                 {
2235                                 s->s3->tmp.cert_req=2;
2236                                 }
2237                         }
2238
2239                 /* Ok, we have a cert */
2240                 s->state=SSL3_ST_CW_CERT_C;
2241                 }
2242
2243         if (s->state == SSL3_ST_CW_CERT_C)
2244                 {
2245                 s->state=SSL3_ST_CW_CERT_D;
2246                 l=ssl3_output_cert_chain(s,
2247                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2248                 s->init_num=(int)l;
2249                 s->init_off=0;
2250                 }
2251         /* SSL3_ST_CW_CERT_D */
2252         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2253         }
2254
2255 #define has_bits(i,m)   (((i)&(m)) == (m))
2256
2257 static int ssl3_check_cert_and_algorithm(SSL *s)
2258         {
2259         int i,idx;
2260         long algs;
2261         EVP_PKEY *pkey=NULL;
2262         SESS_CERT *sc;
2263 #ifndef OPENSSL_NO_RSA
2264         RSA *rsa;
2265 #endif
2266 #ifndef OPENSSL_NO_DH
2267         DH *dh;
2268 #endif
2269
2270         sc=s->session->sess_cert;
2271
2272         if (sc == NULL)
2273                 {
2274                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2275                 goto err;
2276                 }
2277
2278         algs=s->s3->tmp.new_cipher->algorithms;
2279
2280         /* we don't have a certificate */
2281         if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2282                 return(1);
2283
2284 #ifndef OPENSSL_NO_RSA
2285         rsa=s->session->sess_cert->peer_rsa_tmp;
2286 #endif
2287 #ifndef OPENSSL_NO_DH
2288         dh=s->session->sess_cert->peer_dh_tmp;
2289 #endif
2290
2291         /* This is the passed certificate */
2292
2293         idx=sc->peer_cert_type;
2294 #ifndef OPENSSL_NO_ECDH
2295         if (idx == SSL_PKEY_ECC)
2296                 {
2297                 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2298                     s->s3->tmp.new_cipher) == 0)
2299                         { /* check failed */
2300                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2301                         goto f_err;
2302                         }
2303                 else
2304                         {
2305                         return 1;
2306                         }
2307                 }
2308 #endif
2309         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2310         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2311         EVP_PKEY_free(pkey);
2312
2313
2314         /* Check that we have a certificate if we require one */
2315         if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2316                 {
2317                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2318                 goto f_err;
2319                 }
2320 #ifndef OPENSSL_NO_DSA
2321         else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2322                 {
2323                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2324                 goto f_err;
2325                 }
2326 #endif
2327 #ifndef OPENSSL_NO_RSA
2328         if ((algs & SSL_kRSA) &&
2329                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2330                 {
2331                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2332                 goto f_err;
2333                 }
2334 #endif
2335 #ifndef OPENSSL_NO_DH
2336         if ((algs & SSL_kEDH) &&
2337                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2338                 {
2339                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2340                 goto f_err;
2341                 }
2342         else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2343                 {
2344                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2345                 goto f_err;
2346                 }
2347 #ifndef OPENSSL_NO_DSA
2348         else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2349                 {
2350                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2351                 goto f_err;
2352                 }
2353 #endif
2354 #endif
2355
2356         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2357                 {
2358 #ifndef OPENSSL_NO_RSA
2359                 if (algs & SSL_kRSA)
2360                         {
2361                         if (rsa == NULL
2362                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2363                                 {
2364                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2365                                 goto f_err;
2366                                 }
2367                         }
2368                 else
2369 #endif
2370 #ifndef OPENSSL_NO_DH
2371                         if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2372                             {
2373                             if (dh == NULL
2374                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2375                                 {
2376                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2377                                 goto f_err;
2378                                 }
2379                         }
2380                 else
2381 #endif
2382                         {
2383                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2384                         goto f_err;
2385                         }
2386                 }
2387         return(1);
2388 f_err:
2389         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2390 err:
2391         return(0);
2392         }
2393
2394
2395 #ifndef OPENSSL_NO_ECDH
2396 /* This is the complement of nid2curve_id in s3_srvr.c. */
2397 static int curve_id2nid(int curve_id)
2398 {
2399         /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2400          * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2401         static int nid_list[26] =
2402         {
2403                 0,
2404                 NID_sect163k1, /* sect163k1 (1) */
2405                 NID_sect163r1, /* sect163r1 (2) */
2406                 NID_sect163r2, /* sect163r2 (3) */
2407                 NID_sect193r1, /* sect193r1 (4) */
2408                 NID_sect193r2, /* sect193r2 (5) */
2409                 NID_sect233k1, /* sect233k1 (6) */
2410                 NID_sect233r1, /* sect233r1 (7) */
2411                 NID_sect239k1, /* sect239k1 (8) */
2412                 NID_sect283k1, /* sect283k1 (9) */
2413                 NID_sect283r1, /* sect283r1 (10) */
2414                 NID_sect409k1, /* sect409k1 (11) */
2415                 NID_sect409r1, /* sect409r1 (12) */
2416                 NID_sect571k1, /* sect571k1 (13) */
2417                 NID_sect571r1, /* sect571r1 (14) */
2418                 NID_secp160k1, /* secp160k1 (15) */
2419                 NID_secp160r1, /* secp160r1 (16) */
2420                 NID_secp160r2, /* secp160r2 (17) */
2421                 NID_secp192k1, /* secp192k1 (18) */
2422                 NID_X9_62_prime192v1, /* secp192r1 (19) */
2423                 NID_secp224k1, /* secp224k1 (20) */
2424                 NID_secp224r1, /* secp224r1 (21) */
2425                 NID_secp256k1, /* secp256k1 (22) */
2426                 NID_X9_62_prime256v1, /* secp256r1 (23) */
2427                 NID_secp384r1, /* secp384r1 (24) */
2428                 NID_secp521r1  /* secp521r1 (25) */
2429         };
2430
2431         if ((curve_id < 1) || (curve_id > 25)) return 0;
2432
2433         return nid_list[curve_id];
2434 }
2435 #endif