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) 1998-2002 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 "cryptlib.h"
 134
 135 static SSL_METHOD *ssl3_get_client_method(int ver);
 136 static int ssl3_client_hello(SSL *s);
 137 static int ssl3_get_server_hello(SSL *s);
 138 static int ssl3_get_certificate_request(SSL *s);
 139 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
 140 static int ssl3_get_server_done(SSL *s);
 141 static int ssl3_send_client_verify(SSL *s);
 142 static int ssl3_send_client_certificate(SSL *s);
 143 static int ssl3_send_client_key_exchange(SSL *s);
 144 static int ssl3_get_key_exchange(SSL *s);
 145 static int ssl3_get_server_certificate(SSL *s);
 146 static int ssl3_check_cert_and_algorithm(SSL *s);
 147
 148 #ifndef OPENSSL_NO_ECDH
 149 static int curve_id2nid(int curve_id);
 150 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
 151 #endif
 152
 153 static SSL_METHOD *ssl3_get_client_method(int ver)
 154         {
 155         if (ver == SSL3_VERSION)
 156                 return(SSLv3_client_method());
 157         else
 158                 return(NULL);
 159         }
 160
 161 SSL_METHOD *SSLv3_client_method(void)
 162         {
 163         static int init=1;
 164         static SSL_METHOD SSLv3_client_data;
 165
 166         if (init)
 167                 {
 168                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
 169
 170                 if (init)
 171                         {
 172                         memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
 173                                 sizeof(SSL_METHOD));
 174                         SSLv3_client_data.ssl_connect=ssl3_connect;
 175                         SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
 176                         init=0;
 177                         }
 178
 179                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
 180                 }
 181         return(&SSLv3_client_data);
 182         }
 183
 184 int ssl3_connect(SSL *s)
 185         {
 186         BUF_MEM *buf;
 187         unsigned long Time=time(NULL),l;
 188         long num1;
 189         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 190         int ret= -1;
 191         int new_state,state,skip=0;;
 192
 193         RAND_add(&Time,sizeof(Time),0);
 194         ERR_clear_error();
 195         clear_sys_error();
 196
 197         if (s->info_callback != NULL)
 198                 cb=s->info_callback;
 199         else if (s->ctx->info_callback != NULL)
 200                 cb=s->ctx->info_callback;
 201
 202         s->in_handshake++;
 203         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 204
 205         for (;;)
 206                 {
 207                 state=s->state;
 208
 209                 switch(s->state)
 210                         {
 211                 case SSL_ST_RENEGOTIATE:
 212                         s->new_session=1;
 213                         s->state=SSL_ST_CONNECT;
 214                         s->ctx->stats.sess_connect_renegotiate++;
 215                         /* break */
 216                 case SSL_ST_BEFORE:
 217                 case SSL_ST_CONNECT:
 218                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 219                 case SSL_ST_OK|SSL_ST_CONNECT:
 220
 221                         s->server=0;
 222                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 223
 224                         if ((s->version & 0xff00 ) != 0x0300)
 225                                 {
 226                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
 227                                 ret = -1;
 228                                 goto end;
 229                                 }
 230
 231                         /* s->version=SSL3_VERSION; */
 232                         s->type=SSL_ST_CONNECT;
 233
 234                         if (s->init_buf == NULL)
 235                                 {
 236                                 if ((buf=BUF_MEM_new()) == NULL)
 237                                         {
 238                                         ret= -1;
 239                                         goto end;
 240                                         }
 241                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 242                                         {
 243                                         ret= -1;
 244                                         goto end;
 245                                         }
 246                                 s->init_buf=buf;
 247                                 }
 248
 249                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 250
 251                         /* setup buffing BIO */
 252                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
 253
 254                         /* don't push the buffering BIO quite yet */
 255
 256                         ssl3_init_finished_mac(s);
 257
 258                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
 259                         s->ctx->stats.sess_connect++;
 260                         s->init_num=0;
 261                         break;
 262
 263                 case SSL3_ST_CW_CLNT_HELLO_A:
 264                 case SSL3_ST_CW_CLNT_HELLO_B:
 265
 266                         s->shutdown=0;
 267                         ret=ssl3_client_hello(s);
 268                         if (ret <= 0) goto end;
 269                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
 270                         s->init_num=0;
 271
 272                         /* turn on buffering for the next lot of output */
 273                         if (s->bbio != s->wbio)
 274                                 s->wbio=BIO_push(s->bbio,s->wbio);
 275
 276                         break;
 277
 278                 case SSL3_ST_CR_SRVR_HELLO_A:
 279                 case SSL3_ST_CR_SRVR_HELLO_B:
 280                         ret=ssl3_get_server_hello(s);
 281                         if (ret <= 0) goto end;
 282                         if (s->hit)
 283                                 s->state=SSL3_ST_CR_FINISHED_A;
 284                         else
 285                                 s->state=SSL3_ST_CR_CERT_A;
 286                         s->init_num=0;
 287                         break;
 288
 289                 case SSL3_ST_CR_CERT_A:
 290                 case SSL3_ST_CR_CERT_B:
 291                         /* Check if it is anon DH/ECDH */
 292                         if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
 293                                 {
 294                                 ret=ssl3_get_server_certificate(s);
 295                                 if (ret <= 0) goto end;
 296                                 }
 297                         else
 298                                 skip=1;
 299                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 300                         s->init_num=0;
 301                         break;
 302
 303                 case SSL3_ST_CR_KEY_EXCH_A:
 304                 case SSL3_ST_CR_KEY_EXCH_B:
 305                         ret=ssl3_get_key_exchange(s);
 306                         if (ret <= 0) goto end;
 307                         s->state=SSL3_ST_CR_CERT_REQ_A;
 308                         s->init_num=0;
 309
 310                         /* at this point we check that we have the
 311                          * required stuff from the server */
 312                         if (!ssl3_check_cert_and_algorithm(s))
 313                                 {
 314                                 ret= -1;
 315                                 goto end;
 316                                 }
 317                         break;
 318
 319                 case SSL3_ST_CR_CERT_REQ_A:
 320                 case SSL3_ST_CR_CERT_REQ_B:
 321                         ret=ssl3_get_certificate_request(s);
 322                         if (ret <= 0) goto end;
 323                         s->state=SSL3_ST_CR_SRVR_DONE_A;
 324                         s->init_num=0;
 325                         break;
 326
 327                 case SSL3_ST_CR_SRVR_DONE_A:
 328                 case SSL3_ST_CR_SRVR_DONE_B:
 329                         ret=ssl3_get_server_done(s);
 330                         if (ret <= 0) goto end;
 331                         if (s->s3->tmp.cert_req)
 332                                 s->state=SSL3_ST_CW_CERT_A;
 333                         else
 334                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
 335                         s->init_num=0;
 336
 337                         break;
 338
 339                 case SSL3_ST_CW_CERT_A:
 340                 case SSL3_ST_CW_CERT_B:
 341                 case SSL3_ST_CW_CERT_C:
 342                 case SSL3_ST_CW_CERT_D:
 343                         ret=ssl3_send_client_certificate(s);
 344                         if (ret <= 0) goto end;
 345                         s->state=SSL3_ST_CW_KEY_EXCH_A;
 346                         s->init_num=0;
 347                         break;
 348
 349                 case SSL3_ST_CW_KEY_EXCH_A:
 350                 case SSL3_ST_CW_KEY_EXCH_B:
 351                         ret=ssl3_send_client_key_exchange(s);
 352                         if (ret <= 0) goto end;
 353                         l=s->s3->tmp.new_cipher->algorithms;
 354                         /* EAY EAY EAY need to check for DH fix cert
 355                          * sent back */
 356                         /* For TLS, cert_req is set to 2, so a cert chain
 357                          * of nothing is sent, but no verify packet is sent */
 358                         /* XXX: For now, we do not support client
 359                          * authentication in ECDH cipher suites with
 360                          * ECDH (rather than ECDSA) certificates.
 361                          * We need to skip the certificate verify
 362                          * message when client's ECDH public key is sent
 363                          * inside the client certificate.
 364                          */
 365                         if (s->s3->tmp.cert_req == 1)
 366                                 {
 367                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
 368                                 }
 369                         else
 370                                 {
 371                                 s->state=SSL3_ST_CW_CHANGE_A;
 372                                 s->s3->change_cipher_spec=0;
 373                                 }
 374
 375                         s->init_num=0;
 376                         break;
 377
 378                 case SSL3_ST_CW_CERT_VRFY_A:
 379                 case SSL3_ST_CW_CERT_VRFY_B:
 380                         ret=ssl3_send_client_verify(s);
 381                         if (ret <= 0) goto end;
 382                         s->state=SSL3_ST_CW_CHANGE_A;
 383                         s->init_num=0;
 384                         s->s3->change_cipher_spec=0;
 385                         break;
 386
 387                 case SSL3_ST_CW_CHANGE_A:
 388                 case SSL3_ST_CW_CHANGE_B:
 389                         ret=ssl3_send_change_cipher_spec(s,
 390                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
 391                         if (ret <= 0) goto end;
 392                         s->state=SSL3_ST_CW_FINISHED_A;
 393                         s->init_num=0;
 394
 395                         s->session->cipher=s->s3->tmp.new_cipher;
 396                         if (s->s3->tmp.new_compression == NULL)
 397                                 s->session->compress_meth=0;
 398                         else
 399                                 s->session->compress_meth=
 400                                         s->s3->tmp.new_compression->id;
 401                         if (!s->method->ssl3_enc->setup_key_block(s))
 402                                 {
 403                                 ret= -1;
 404                                 goto end;
 405                                 }
 406
 407                         if (!s->method->ssl3_enc->change_cipher_state(s,
 408                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
 409                                 {
 410                                 ret= -1;
 411                                 goto end;
 412                                 }
 413
 414                         break;
 415
 416                 case SSL3_ST_CW_FINISHED_A:
 417                 case SSL3_ST_CW_FINISHED_B:
 418                         ret=ssl3_send_finished(s,
 419                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
 420                                 s->method->ssl3_enc->client_finished_label,
 421                                 s->method->ssl3_enc->client_finished_label_len);
 422                         if (ret <= 0) goto end;
 423                         s->state=SSL3_ST_CW_FLUSH;
 424
 425                         /* clear flags */
 426                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 427                         if (s->hit)
 428                                 {
 429                                 s->s3->tmp.next_state=SSL_ST_OK;
 430                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
 431                                         {
 432                                         s->state=SSL_ST_OK;
 433                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
 434                                         s->s3->delay_buf_pop_ret=0;
 435                                         }
 436                                 }
 437                         else
 438                                 {
 439                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
 440                                 }
 441                         s->init_num=0;
 442                         break;
 443
 444                 case SSL3_ST_CR_FINISHED_A:
 445                 case SSL3_ST_CR_FINISHED_B:
 446
 447                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 448                                 SSL3_ST_CR_FINISHED_B);
 449                         if (ret <= 0) goto end;
 450
 451                         if (s->hit)
 452                                 s->state=SSL3_ST_CW_CHANGE_A;
 453                         else
 454                                 s->state=SSL_ST_OK;
 455                         s->init_num=0;
 456                         break;
 457
 458                 case SSL3_ST_CW_FLUSH:
 459                         /* number of bytes to be flushed */
 460                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
 461                         if (num1 > 0)
 462                                 {
 463                                 s->rwstate=SSL_WRITING;
 464                                 num1=BIO_flush(s->wbio);
 465                                 if (num1 <= 0) { ret= -1; goto end; }
 466                                 s->rwstate=SSL_NOTHING;
 467                                 }
 468
 469                         s->state=s->s3->tmp.next_state;
 470                         break;
 471
 472                 case SSL_ST_OK:
 473                         /* clean a few things up */
 474                         ssl3_cleanup_key_block(s);
 475
 476                         if (s->init_buf != NULL)
 477                                 {
 478                                 BUF_MEM_free(s->init_buf);
 479                                 s->init_buf=NULL;
 480                                 }
 481
 482                         /* If we are not 'joining' the last two packets,
 483                          * remove the buffering now */
 484                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 485                                 ssl_free_wbio_buffer(s);
 486                         /* else do it later in ssl3_write */
 487
 488                         s->init_num=0;
 489                         s->new_session=0;
 490
 491                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 492                         if (s->hit) s->ctx->stats.sess_hit++;
 493
 494                         ret=1;
 495                         /* s->server=0; */
 496                         s->handshake_func=ssl3_connect;
 497                         s->ctx->stats.sess_connect_good++;
 498
 499                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 500
 501                         goto end;
 502                         /* break; */
 503
 504                 default:
 505                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 506                         ret= -1;
 507                         goto end;
 508                         /* break; */
 509                         }
 510
 511                 /* did we do anything */
 512                 if (!s->s3->tmp.reuse_message && !skip)
 513                         {
 514                         if (s->debug)
 515                                 {
 516                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 517                                         goto end;
 518                                 }
 519
 520                         if ((cb != NULL) && (s->state != state))
 521                                 {
 522                                 new_state=s->state;
 523                                 s->state=state;
 524                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 525                                 s->state=new_state;
 526                                 }
 527                         }
 528                 skip=0;
 529                 }
 530 end:
 531         s->in_handshake--;
 532         if (cb != NULL)
 533                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 534         return(ret);
 535         }
 536
 537
 538 static int ssl3_client_hello(SSL *s)
 539         {
 540         unsigned char *buf;
 541         unsigned char *p,*d;
 542         int i,j;
 543         unsigned long Time,l;
 544         SSL_COMP *comp;
 545
 546         buf=(unsigned char *)s->init_buf->data;
 547         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 548                 {
 549                 if ((s->session == NULL) ||
 550                         (s->session->ssl_version != s->version) ||
 551                         (s->session->not_resumable))
 552                         {
 553                         if (!ssl_get_new_session(s,0))
 554                                 goto err;
 555                         }
 556                 /* else use the pre-loaded session */
 557
 558                 p=s->s3->client_random;
 559                 Time=time(NULL);                        /* Time */
 560                 l2n(Time,p);
 561                 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
 562
 563                 /* Do the message type and length last */
 564                 d=p= &(buf[4]);
 565
 566                 *(p++)=s->version>>8;
 567                 *(p++)=s->version&0xff;
 568                 s->client_version=s->version;
 569
 570                 /* Random stuff */
 571                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 572                 p+=SSL3_RANDOM_SIZE;
 573
 574                 /* Session ID */
 575                 if (s->new_session)
 576                         i=0;
 577                 else
 578                         i=s->session->session_id_length;
 579                 *(p++)=i;
 580                 if (i != 0)
 581                         {
 582                         if (i > sizeof s->session->session_id)
 583                                 {
 584                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
 585                                 goto err;
 586                                 }
 587                         memcpy(p,s->session->session_id,i);
 588                         p+=i;
 589                         }
 590
 591                 /* Ciphers supported */
 592                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
 593                 if (i == 0)
 594                         {
 595                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 596                         goto err;
 597                         }
 598                 s2n(i,p);
 599                 p+=i;
 600
 601                 /* COMPRESSION */
 602                 if (s->ctx->comp_methods == NULL)
 603                         j=0;
 604                 else
 605                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 606                 *(p++)=1+j;
 607                 for (i=0; i<j; i++)
 608                         {
 609                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 610                         *(p++)=comp->id;
 611                         }
 612                 *(p++)=0; /* Add the NULL method */
 613
 614                 l=(p-d);
 615                 d=buf;
 616                 *(d++)=SSL3_MT_CLIENT_HELLO;
 617                 l2n3(l,d);
 618
 619                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 620                 /* number of bytes to write */
 621                 s->init_num=p-buf;
 622                 s->init_off=0;
 623                 }
 624
 625         /* SSL3_ST_CW_CLNT_HELLO_B */
 626         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 627 err:
 628         return(-1);
 629         }
 630
 631 static int ssl3_get_server_hello(SSL *s)
 632         {
 633         STACK_OF(SSL_CIPHER) *sk;
 634         SSL_CIPHER *c;
 635         unsigned char *p,*d;
 636         int i,al,ok;
 637         unsigned int j;
 638         long n;
 639         SSL_COMP *comp;
 640
 641         n=ssl3_get_message(s,
 642                 SSL3_ST_CR_SRVR_HELLO_A,
 643                 SSL3_ST_CR_SRVR_HELLO_B,
 644                 SSL3_MT_SERVER_HELLO,
 645                 300, /* ?? */
 646                 &ok);
 647
 648         if (!ok) return((int)n);
 649         d=p=(unsigned char *)s->init_msg;
 650
 651         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 652                 {
 653                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 654                 s->version=(s->version&0xff00)|p[1];
 655                 al=SSL_AD_PROTOCOL_VERSION;
 656                 goto f_err;
 657                 }
 658         p+=2;
 659
 660         /* load the server hello data */
 661         /* load the server random */
 662         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 663         p+=SSL3_RANDOM_SIZE;
 664
 665         /* get the session-id */
 666         j= *(p++);
 667
 668         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
 669                 {
 670                 al=SSL_AD_ILLEGAL_PARAMETER;
 671                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
 672                 goto f_err;
 673                 }
 674         if (j != 0 && j == s->session->session_id_length
 675             && memcmp(p,s->session->session_id,j) == 0)
 676             {
 677             if(s->sid_ctx_length != s->session->sid_ctx_length
 678                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 679                 {
 680                 /* actually a client application bug */
 681                 al=SSL_AD_ILLEGAL_PARAMETER;
 682                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 683                 goto f_err;
 684                 }
 685             s->hit=1;
 686             }
 687         else    /* a miss or crap from the other end */
 688                 {
 689                 /* If we were trying for session-id reuse, make a new
 690                  * SSL_SESSION so we don't stuff up other people */
 691                 s->hit=0;
 692                 if (s->session->session_id_length > 0)
 693                         {
 694                         if (!ssl_get_new_session(s,0))
 695                                 {
 696                                 al=SSL_AD_INTERNAL_ERROR;
 697                                 goto f_err;
 698                                 }
 699                         }
 700                 s->session->session_id_length=j;
 701                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 702                 }
 703         p+=j;
 704         c=ssl_get_cipher_by_char(s,p);
 705         if (c == NULL)
 706                 {
 707                 /* unknown cipher */
 708                 al=SSL_AD_ILLEGAL_PARAMETER;
 709                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 710                 goto f_err;
 711                 }
 712         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 713
 714         sk=ssl_get_ciphers_by_id(s);
 715         i=sk_SSL_CIPHER_find(sk,c);
 716         if (i < 0)
 717                 {
 718                 /* we did not say we would use this cipher */
 719                 al=SSL_AD_ILLEGAL_PARAMETER;
 720                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 721                 goto f_err;
 722                 }
 723
 724         if (s->hit && (s->session->cipher != c))
 725                 {
 726                 if (!(s->options &
 727                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 728                         {
 729                         al=SSL_AD_ILLEGAL_PARAMETER;
 730                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 731                         goto f_err;
 732                         }
 733                 }
 734         s->s3->tmp.new_cipher=c;
 735
 736         /* lets get the compression algorithm */
 737         /* COMPRESSION */
 738         j= *(p++);
 739         if (j == 0)
 740                 comp=NULL;
 741         else
 742                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
 743
 744         if ((j != 0) && (comp == NULL))
 745                 {
 746                 al=SSL_AD_ILLEGAL_PARAMETER;
 747                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 748                 goto f_err;
 749                 }
 750         else
 751                 {
 752                 s->s3->tmp.new_compression=comp;
 753                 }
 754
 755         if (p != (d+n))
 756                 {
 757                 /* wrong packet length */
 758                 al=SSL_AD_DECODE_ERROR;
 759                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
 760                 goto err;
 761                 }
 762
 763         return(1);
 764 f_err:
 765         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 766 err:
 767         return(-1);
 768         }
 769
 770 static int ssl3_get_server_certificate(SSL *s)
 771         {
 772         int al,i,ok,ret= -1;
 773         unsigned long n,nc,llen,l;
 774         X509 *x=NULL;
 775         unsigned char *p,*d,*q;
 776         STACK_OF(X509) *sk=NULL;
 777         SESS_CERT *sc;
 778         EVP_PKEY *pkey=NULL;
 779         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
 780
 781         n=ssl3_get_message(s,
 782                 SSL3_ST_CR_CERT_A,
 783                 SSL3_ST_CR_CERT_B,
 784                 -1,
 785                 s->max_cert_list,
 786                 &ok);
 787
 788         if (!ok) return((int)n);
 789
 790         if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
 791                 {
 792                 s->s3->tmp.reuse_message=1;
 793                 return(1);
 794                 }
 795
 796         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
 797                 {
 798                 al=SSL_AD_UNEXPECTED_MESSAGE;
 799                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
 800                 goto f_err;
 801                 }
 802         d=p=(unsigned char *)s->init_msg;
 803
 804         if ((sk=sk_X509_new_null()) == NULL)
 805                 {
 806                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 807                 goto err;
 808                 }
 809
 810         n2l3(p,llen);
 811         if (llen+3 != n)
 812                 {
 813                 al=SSL_AD_DECODE_ERROR;
 814                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
 815                 goto f_err;
 816                 }
 817         for (nc=0; nc<llen; )
 818                 {
 819                 n2l3(p,l);
 820                 if ((l+nc+3) > llen)
 821                         {
 822                         al=SSL_AD_DECODE_ERROR;
 823                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 824                         goto f_err;
 825                         }
 826
 827                 q=p;
 828                 x=d2i_X509(NULL,&q,l);
 829                 if (x == NULL)
 830                         {
 831                         al=SSL_AD_BAD_CERTIFICATE;
 832                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
 833                         goto f_err;
 834                         }
 835                 if (q != (p+l))
 836                         {
 837                         al=SSL_AD_DECODE_ERROR;
 838                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 839                         goto f_err;
 840                         }
 841                 if (!sk_X509_push(sk,x))
 842                         {
 843                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 844                         goto err;
 845                         }
 846                 x=NULL;
 847                 nc+=l+3;
 848                 p=q;
 849                 }
 850
 851         i=ssl_verify_cert_chain(s,sk);
 852         if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
 853 #ifndef OPENSSL_NO_KRB5
 854                 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
 855                 != (SSL_aKRB5|SSL_kKRB5)
 856 #endif /* OPENSSL_NO_KRB5 */
 857                 )
 858                 {
 859                 al=ssl_verify_alarm_type(s->verify_result);
 860                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
 861                 goto f_err;
 862                 }
 863         ERR_clear_error(); /* but we keep s->verify_result */
 864
 865         sc=ssl_sess_cert_new();
 866         if (sc == NULL) goto err;
 867
 868         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
 869         s->session->sess_cert=sc;
 870
 871         sc->cert_chain=sk;
 872         /* Inconsistency alert: cert_chain does include the peer's
 873          * certificate, which we don't include in s3_srvr.c */
 874         x=sk_X509_value(sk,0);
 875         sk=NULL;
 876         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
 877
 878         pkey=X509_get_pubkey(x);
 879
 880         /* VRS: allow null cert if auth == KRB5 */
 881         need_cert =     ((s->s3->tmp.new_cipher->algorithms
 882                         & (SSL_MKEY_MASK|SSL_AUTH_MASK))
 883                         == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
 884
 885 #ifdef KSSL_DEBUG
 886         printf("pkey,x = %p, %p\n", pkey,x);
 887         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
 888         printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
 889                 s->s3->tmp.new_cipher->algorithms, need_cert);
 890 #endif    /* KSSL_DEBUG */
 891
 892         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
 893                 {
 894                 x=NULL;
 895                 al=SSL3_AL_FATAL;
 896                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
 897                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
 898                 goto f_err;
 899                 }
 900
 901         i=ssl_cert_type(x,pkey);
 902         if (need_cert && i < 0)
 903                 {
 904                 x=NULL;
 905                 al=SSL3_AL_FATAL;
 906                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
 907                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
 908                 goto f_err;
 909                 }
 910
 911         if (need_cert)
 912                 {
 913                 sc->peer_cert_type=i;
 914                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 915                 /* Why would the following ever happen?
 916                  * We just created sc a couple of lines ago. */
 917                 if (sc->peer_pkeys[i].x509 != NULL)
 918                         X509_free(sc->peer_pkeys[i].x509);
 919                 sc->peer_pkeys[i].x509=x;
 920                 sc->peer_key= &(sc->peer_pkeys[i]);
 921
 922                 if (s->session->peer != NULL)
 923                         X509_free(s->session->peer);
 924                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 925                 s->session->peer=x;
 926                 }
 927         else
 928                 {
 929                 sc->peer_cert_type=i;
 930                 sc->peer_key= NULL;
 931
 932                 if (s->session->peer != NULL)
 933                         X509_free(s->session->peer);
 934                 s->session->peer=NULL;
 935                 }
 936         s->session->verify_result = s->verify_result;
 937
 938         x=NULL;
 939         ret=1;
 940
 941         if (0)
 942                 {
 943 f_err:
 944                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
 945                 }
 946 err:
 947         EVP_PKEY_free(pkey);
 948         X509_free(x);
 949         sk_X509_pop_free(sk,X509_free);
 950         return(ret);
 951         }
 952
 953 static int ssl3_get_key_exchange(SSL *s)
 954         {
 955 #ifndef OPENSSL_NO_RSA
 956         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
 957 #endif
 958         EVP_MD_CTX md_ctx;
 959         unsigned char *param,*p;
 960         int al,i,j,param_len,ok;
 961         long n,alg;
 962         EVP_PKEY *pkey=NULL;
 963 #ifndef OPENSSL_NO_RSA
 964         RSA *rsa=NULL;
 965 #endif
 966 #ifndef OPENSSL_NO_DH
 967         DH *dh=NULL;
 968 #endif
 969 #ifndef OPENSSL_NO_ECDH
 970         EC_KEY *ecdh = NULL;
 971         BN_CTX *bn_ctx = NULL;
 972         EC_POINT *srvr_ecpoint = NULL;
 973         int curve_nid = 0;
 974         int encoded_pt_len = 0;
 975 #endif
 976
 977         /* use same message size as in ssl3_get_certificate_request()
 978          * as ServerKeyExchange message may be skipped */
 979         n=ssl3_get_message(s,
 980                 SSL3_ST_CR_KEY_EXCH_A,
 981                 SSL3_ST_CR_KEY_EXCH_B,
 982                 -1,
 983                 s->max_cert_list,
 984                 &ok);
 985
 986         if (!ok) return((int)n);
 987
 988         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
 989                 {
 990                 s->s3->tmp.reuse_message=1;
 991                 return(1);
 992                 }
 993
 994         param=p=(unsigned char *)s->init_msg;
 995
 996         if (s->session->sess_cert != NULL)
 997                 {
 998 #ifndef OPENSSL_NO_RSA
 999                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1000                         {
1001                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
1002                         s->session->sess_cert->peer_rsa_tmp=NULL;
1003                         }
1004 #endif
1005 #ifndef OPENSSL_NO_DH
1006                 if (s->session->sess_cert->peer_dh_tmp)
1007                         {
1008                         DH_free(s->session->sess_cert->peer_dh_tmp);
1009                         s->session->sess_cert->peer_dh_tmp=NULL;
1010                         }
1011 #endif
1012 #ifndef OPENSSL_NO_ECDH
1013                 if (s->session->sess_cert->peer_ecdh_tmp)
1014                         {
1015                         EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1016                         s->session->sess_cert->peer_ecdh_tmp=NULL;
1017                         }
1018 #endif
1019                 }
1020         else
1021                 {
1022                 s->session->sess_cert=ssl_sess_cert_new();
1023                 }
1024
1025         param_len=0;
1026         alg=s->s3->tmp.new_cipher->algorithms;
1027         EVP_MD_CTX_init(&md_ctx);
1028
1029 #ifndef OPENSSL_NO_RSA
1030         if (alg & SSL_kRSA)
1031                 {
1032                 if ((rsa=RSA_new()) == NULL)
1033                         {
1034                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1035                         goto err;
1036                         }
1037                 n2s(p,i);
1038                 param_len=i+2;
1039                 if (param_len > n)
1040                         {
1041                         al=SSL_AD_DECODE_ERROR;
1042                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1043                         goto f_err;
1044                         }
1045                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1046                         {
1047                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1048                         goto err;
1049                         }
1050                 p+=i;
1051
1052                 n2s(p,i);
1053                 param_len+=i+2;
1054                 if (param_len > n)
1055                         {
1056                         al=SSL_AD_DECODE_ERROR;
1057                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1058                         goto f_err;
1059                         }
1060                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1061                         {
1062                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1063                         goto err;
1064                         }
1065                 p+=i;
1066                 n-=param_len;
1067
1068                 /* this should be because we are using an export cipher */
1069                 if (alg & SSL_aRSA)
1070                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1071                 else
1072                         {
1073                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1074                         goto err;
1075                         }
1076                 s->session->sess_cert->peer_rsa_tmp=rsa;
1077                 rsa=NULL;
1078                 }
1079 #else /* OPENSSL_NO_RSA */
1080         if (0)
1081                 ;
1082 #endif
1083 #ifndef OPENSSL_NO_DH
1084         else if (alg & SSL_kEDH)
1085                 {
1086                 if ((dh=DH_new()) == NULL)
1087                         {
1088                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1089                         goto err;
1090                         }
1091                 n2s(p,i);
1092                 param_len=i+2;
1093                 if (param_len > n)
1094                         {
1095                         al=SSL_AD_DECODE_ERROR;
1096                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1097                         goto f_err;
1098                         }
1099                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1100                         {
1101                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1102                         goto err;
1103                         }
1104                 p+=i;
1105
1106                 n2s(p,i);
1107                 param_len+=i+2;
1108                 if (param_len > n)
1109                         {
1110                         al=SSL_AD_DECODE_ERROR;
1111                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1112                         goto f_err;
1113                         }
1114                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1115                         {
1116                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1117                         goto err;
1118                         }
1119                 p+=i;
1120
1121                 n2s(p,i);
1122                 param_len+=i+2;
1123                 if (param_len > n)
1124                         {
1125                         al=SSL_AD_DECODE_ERROR;
1126                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1127                         goto f_err;
1128                         }
1129                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1130                         {
1131                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1132                         goto err;
1133                         }
1134                 p+=i;
1135                 n-=param_len;
1136
1137 #ifndef OPENSSL_NO_RSA
1138                 if (alg & SSL_aRSA)
1139                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1140 #else
1141                 if (0)
1142                         ;
1143 #endif
1144 #ifndef OPENSSL_NO_DSA
1145                 else if (alg & SSL_aDSS)
1146                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1147 #endif
1148                 /* else anonymous DH, so no certificate or pkey. */
1149
1150                 s->session->sess_cert->peer_dh_tmp=dh;
1151                 dh=NULL;
1152                 }
1153         else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1154                 {
1155                 al=SSL_AD_ILLEGAL_PARAMETER;
1156                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1157                 goto f_err;
1158                 }
1159 #endif /* !OPENSSL_NO_DH */
1160
1161 #ifndef OPENSSL_NO_ECDH
1162         else if (alg & SSL_kECDHE)
1163                 {
1164                 if ((ecdh=EC_KEY_new()) == NULL)
1165                         {
1166                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1167                         goto err;
1168                         }
1169
1170                 /* Extract elliptic curve parameters and the
1171                  * server's ephemeral ECDH public key.
1172                  * Keep accumulating lengths of various components in
1173                  * param_len and make sure it never exceeds n.
1174                  */
1175
1176                 /* XXX: For now we only support named (not generic) curves
1177                  * and the ECParameters in this case is just two bytes.
1178                  */
1179                 param_len=2;
1180                 if ((param_len > n) ||
1181                     (*p != NAMED_CURVE_TYPE) ||
1182                     ((curve_nid = curve_id2nid(*(p + 1))) == 0))
1183                         {
1184                         al=SSL_AD_INTERNAL_ERROR;
1185                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1186                         goto f_err;
1187                         }
1188
1189                 if (!(ecdh->group=EC_GROUP_new_by_nid(curve_nid)))
1190                         {
1191                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1192                         goto err;
1193                         }
1194
1195                 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1196                     (EC_GROUP_get_degree(ecdh->group) > 163))
1197                         {
1198                         al=SSL_AD_EXPORT_RESTRICTION;
1199                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1200                         goto f_err;
1201                         }
1202
1203                 p+=2;
1204
1205                 /* Next, get the encoded ECPoint */
1206                 if (((srvr_ecpoint = EC_POINT_new(ecdh->group)) == NULL) ||
1207                     ((bn_ctx = BN_CTX_new()) == NULL))
1208                         {
1209                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1210                         goto err;
1211                         }
1212
1213                 encoded_pt_len = *p;  /* length of encoded point */
1214                 p+=1;
1215                 param_len += (1 + encoded_pt_len);
1216                 if ((param_len > n) ||
1217                     (EC_POINT_oct2point(ecdh->group, srvr_ecpoint,
1218                         p, encoded_pt_len, bn_ctx) == 0))
1219                         {
1220                         al=SSL_AD_DECODE_ERROR;
1221                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1222                         goto f_err;
1223                         }
1224
1225                 n-=param_len;
1226                 p+=encoded_pt_len;
1227
1228                 /* The ECC/TLS specification does not mention
1229                  * the use of DSA to sign ECParameters in the server
1230                  * key exchange message. We do support RSA and ECDSA.
1231                  */
1232                 if (0) ;
1233 #ifndef OPENSSL_NO_RSA
1234                 else if (alg & SSL_aRSA)
1235                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1236 #endif
1237 #ifndef OPENSSL_NO_ECDSA
1238                 else if (alg & SSL_aECDSA)
1239                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1240 #endif
1241                 /* else anonymous ECDH, so no certificate or pkey. */
1242                 ecdh->pub_key = srvr_ecpoint;
1243                 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1244                 ecdh=NULL;
1245                 BN_CTX_free(bn_ctx);
1246                 srvr_ecpoint = NULL;
1247                 }
1248         else if (alg & SSL_kECDH)
1249                 {
1250                 al=SSL_AD_UNEXPECTED_MESSAGE;
1251                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1252                 goto f_err;
1253                 }
1254 #endif /* !OPENSSL_NO_ECDH */
1255         if (alg & SSL_aFZA)
1256                 {
1257                 al=SSL_AD_HANDSHAKE_FAILURE;
1258                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1259                 goto f_err;
1260                 }
1261
1262
1263         /* p points to the next byte, there are 'n' bytes left */
1264
1265         /* if it was signed, check the signature */
1266         if (pkey != NULL)
1267                 {
1268                 n2s(p,i);
1269                 n-=2;
1270                 j=EVP_PKEY_size(pkey);
1271
1272                 if ((i != n) || (n > j) || (n <= 0))
1273                         {
1274                         /* wrong packet length */
1275                         al=SSL_AD_DECODE_ERROR;
1276                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1277                         goto f_err;
1278                         }
1279
1280 #ifndef OPENSSL_NO_RSA
1281                 if (pkey->type == EVP_PKEY_RSA)
1282                         {
1283                         int num;
1284
1285                         j=0;
1286                         q=md_buf;
1287                         for (num=2; num > 0; num--)
1288                                 {
1289                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1290                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1291                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1292                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1293                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1294                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1295                                 q+=i;
1296                                 j+=i;
1297                                 }
1298                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1299                                                                 pkey->pkey.rsa);
1300                         if (i < 0)
1301                                 {
1302                                 al=SSL_AD_DECRYPT_ERROR;
1303                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1304                                 goto f_err;
1305                                 }
1306                         if (i == 0)
1307                                 {
1308                                 /* bad signature */
1309                                 al=SSL_AD_DECRYPT_ERROR;
1310                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1311                                 goto f_err;
1312                                 }
1313                         }
1314                 else
1315 #endif
1316 #ifndef OPENSSL_NO_DSA
1317                         if (pkey->type == EVP_PKEY_DSA)
1318                         {
1319                         /* lets do DSS */
1320                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1321                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1322                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1323                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1324                         if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1325                                 {
1326                                 /* bad signature */
1327                                 al=SSL_AD_DECRYPT_ERROR;
1328                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1329                                 goto f_err;
1330                                 }
1331                         }
1332                 else
1333 #endif
1334 #ifndef OPENSSL_NO_ECDSA
1335                         if (pkey->type == EVP_PKEY_EC)
1336                         {
1337                         /* let's do ECDSA */
1338                         EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1339                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1340                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1341                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1342                         if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1343                                 {
1344                                 /* bad signature */
1345                                 al=SSL_AD_DECRYPT_ERROR;
1346                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1347                                 goto f_err;
1348                                 }
1349                         }
1350                 else
1351 #endif
1352                         {
1353                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1354                         goto err;
1355                         }
1356                 }
1357         else
1358                 {
1359                 /* still data left over */
1360                 if (!(alg & SSL_aNULL))
1361                         {
1362                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1363                         goto err;
1364                         }
1365                 if (n != 0)
1366                         {
1367                         al=SSL_AD_DECODE_ERROR;
1368                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1369                         goto f_err;
1370                         }
1371                 }
1372         EVP_PKEY_free(pkey);
1373         EVP_MD_CTX_cleanup(&md_ctx);
1374         return(1);
1375 f_err:
1376         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1377 err:
1378         EVP_PKEY_free(pkey);
1379 #ifndef OPENSSL_NO_RSA
1380         if (rsa != NULL)
1381                 RSA_free(rsa);
1382 #endif
1383 #ifndef OPENSSL_NO_DH
1384         if (dh != NULL)
1385                 DH_free(dh);
1386 #endif
1387 #ifndef OPENSSL_NO_ECDH
1388         BN_CTX_free(bn_ctx);
1389         EC_POINT_free(srvr_ecpoint);
1390         if (ecdh != NULL)
1391                 EC_KEY_free(ecdh);
1392 #endif
1393         EVP_MD_CTX_cleanup(&md_ctx);
1394         return(-1);
1395         }
1396
1397 static int ssl3_get_certificate_request(SSL *s)
1398         {
1399         int ok,ret=0;
1400         unsigned long n,nc,l;
1401         unsigned int llen,ctype_num,i;
1402         X509_NAME *xn=NULL;
1403         unsigned char *p,*d,*q;
1404         STACK_OF(X509_NAME) *ca_sk=NULL;
1405
1406         n=ssl3_get_message(s,
1407                 SSL3_ST_CR_CERT_REQ_A,
1408                 SSL3_ST_CR_CERT_REQ_B,
1409                 -1,
1410                 s->max_cert_list,
1411                 &ok);
1412
1413         if (!ok) return((int)n);
1414
1415         s->s3->tmp.cert_req=0;
1416
1417         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1418                 {
1419                 s->s3->tmp.reuse_message=1;
1420                 return(1);
1421                 }
1422
1423         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1424                 {
1425                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1426                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1427                 goto err;
1428                 }
1429
1430         /* TLS does not like anon-DH with client cert */
1431         if (s->version > SSL3_VERSION)
1432                 {
1433                 l=s->s3->tmp.new_cipher->algorithms;
1434                 if (l & SSL_aNULL)
1435                         {
1436                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1437                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1438                         goto err;
1439                         }
1440                 }
1441
1442         d=p=(unsigned char *)s->init_msg;
1443
1444         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1445                 {
1446                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1447                 goto err;
1448                 }
1449
1450         /* get the certificate types */
1451         ctype_num= *(p++);
1452         if (ctype_num > SSL3_CT_NUMBER)
1453                 ctype_num=SSL3_CT_NUMBER;
1454         for (i=0; i<ctype_num; i++)
1455                 s->s3->tmp.ctype[i]= p[i];
1456         p+=ctype_num;
1457
1458         /* get the CA RDNs */
1459         n2s(p,llen);
1460 #if 0
1461 {
1462 FILE *out;
1463 out=fopen("/tmp/vsign.der","w");
1464 fwrite(p,1,llen,out);
1465 fclose(out);
1466 }
1467 #endif
1468
1469         if ((llen+ctype_num+2+1) != n)
1470                 {
1471                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1472                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1473                 goto err;
1474                 }
1475
1476         for (nc=0; nc<llen; )
1477                 {
1478                 n2s(p,l);
1479                 if ((l+nc+2) > llen)
1480                         {
1481                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1482                                 goto cont; /* netscape bugs */
1483                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1484                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1485                         goto err;
1486                         }
1487
1488                 q=p;
1489
1490                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1491                         {
1492                         /* If netscape tolerance is on, ignore errors */
1493                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1494                                 goto cont;
1495                         else
1496                                 {
1497                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1498                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1499                                 goto err;
1500                                 }
1501                         }
1502
1503                 if (q != (p+l))
1504                         {
1505                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1506                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1507                         goto err;
1508                         }
1509                 if (!sk_X509_NAME_push(ca_sk,xn))
1510                         {
1511                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1512                         goto err;
1513                         }
1514
1515                 p+=l;
1516                 nc+=l+2;
1517                 }
1518
1519         if (0)
1520                 {
1521 cont:
1522                 ERR_clear_error();
1523                 }
1524
1525         /* we should setup a certificate to return.... */
1526         s->s3->tmp.cert_req=1;
1527         s->s3->tmp.ctype_num=ctype_num;
1528         if (s->s3->tmp.ca_names != NULL)
1529                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1530         s->s3->tmp.ca_names=ca_sk;
1531         ca_sk=NULL;
1532
1533         ret=1;
1534 err:
1535         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1536         return(ret);
1537         }
1538
1539 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1540         {
1541         return(X509_NAME_cmp(*a,*b));
1542         }
1543
1544 static int ssl3_get_server_done(SSL *s)
1545         {
1546         int ok,ret=0;
1547         long n;
1548
1549         n=ssl3_get_message(s,
1550                 SSL3_ST_CR_SRVR_DONE_A,
1551                 SSL3_ST_CR_SRVR_DONE_B,
1552                 SSL3_MT_SERVER_DONE,
1553                 30, /* should be very small, like 0 :-) */
1554                 &ok);
1555
1556         if (!ok) return((int)n);
1557         if (n > 0)
1558                 {
1559                 /* should contain no data */
1560                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1561                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1562                 return -1;
1563                 }
1564         ret=1;
1565         return(ret);
1566         }
1567
1568 static int ssl3_send_client_key_exchange(SSL *s)
1569         {
1570         unsigned char *p,*d;
1571         int n;
1572         unsigned long l;
1573 #ifndef OPENSSL_NO_RSA
1574         unsigned char *q;
1575         EVP_PKEY *pkey=NULL;
1576 #endif
1577 #ifndef OPENSSL_NO_KRB5
1578         KSSL_ERR kssl_err;
1579 #endif /* OPENSSL_NO_KRB5 */
1580 #ifndef OPENSSL_NO_ECDH
1581         EC_KEY *clnt_ecdh = NULL;
1582         EC_POINT *srvr_ecpoint = NULL;
1583         EVP_PKEY *srvr_pub_pkey = NULL;
1584         unsigned char *encodedPoint = NULL;
1585         int encoded_pt_len = 0;
1586         BN_CTX * bn_ctx = NULL;
1587 #endif
1588
1589         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1590                 {
1591                 d=(unsigned char *)s->init_buf->data;
1592                 p= &(d[4]);
1593
1594                 l=s->s3->tmp.new_cipher->algorithms;
1595
1596                 /* Fool emacs indentation */
1597                 if (0) {}
1598 #ifndef OPENSSL_NO_RSA
1599                 else if (l & SSL_kRSA)
1600                         {
1601                         RSA *rsa;
1602                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1603
1604                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
1605                                 rsa=s->session->sess_cert->peer_rsa_tmp;
1606                         else
1607                                 {
1608                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1609                                 if ((pkey == NULL) ||
1610                                         (pkey->type != EVP_PKEY_RSA) ||
1611                                         (pkey->pkey.rsa == NULL))
1612                                         {
1613                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1614                                         goto err;
1615                                         }
1616                                 rsa=pkey->pkey.rsa;
1617                                 EVP_PKEY_free(pkey);
1618                                 }
1619
1620                         tmp_buf[0]=s->client_version>>8;
1621                         tmp_buf[1]=s->client_version&0xff;
1622                         if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1623                                         goto err;
1624
1625                         s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1626
1627                         q=p;
1628                         /* Fix buf for TLS and beyond */
1629                         if (s->version > SSL3_VERSION)
1630                                 p+=2;
1631                         n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1632                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1633 #ifdef PKCS1_CHECK
1634                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1635                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1636 #endif
1637                         if (n <= 0)
1638                                 {
1639                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1640                                 goto err;
1641                                 }
1642
1643                         /* Fix buf for TLS and beyond */
1644                         if (s->version > SSL3_VERSION)
1645                                 {
1646                                 s2n(n,q);
1647                                 n+=2;
1648                                 }
1649
1650                         s->session->master_key_length=
1651                                 s->method->ssl3_enc->generate_master_secret(s,
1652                                         s->session->master_key,
1653                                         tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1654                         memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1655                         }
1656 #endif
1657 #ifndef OPENSSL_NO_KRB5
1658                 else if (l & SSL_kKRB5)
1659                         {
1660                         krb5_error_code krb5rc;
1661                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
1662                         /*  krb5_data   krb5_ap_req;  */
1663                         krb5_data       *enc_ticket;
1664                         krb5_data       authenticator, *authp = NULL;
1665                         EVP_CIPHER_CTX  ciph_ctx;
1666                         EVP_CIPHER      *enc = NULL;
1667                         unsigned char   iv[EVP_MAX_IV_LENGTH];
1668                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1669                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
1670                                                 + EVP_MAX_IV_LENGTH];
1671                         int             padl, outl = sizeof(epms);
1672
1673                         EVP_CIPHER_CTX_init(&ciph_ctx);
1674
1675 #ifdef KSSL_DEBUG
1676                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1677                                 l, SSL_kKRB5);
1678 #endif  /* KSSL_DEBUG */
1679
1680                         authp = NULL;
1681 #ifdef KRB5SENDAUTH
1682                         if (KRB5SENDAUTH)  authp = &authenticator;
1683 #endif  /* KRB5SENDAUTH */
1684
1685                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1686                                 &kssl_err);
1687                         enc = kssl_map_enc(kssl_ctx->enctype);
1688                         if (enc == NULL)
1689                             goto err;
1690 #ifdef KSSL_DEBUG
1691                         {
1692                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
1693                         if (krb5rc && kssl_err.text)
1694                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1695                         }
1696 #endif  /* KSSL_DEBUG */
1697
1698                         if (krb5rc)
1699                                 {
1700                                 ssl3_send_alert(s,SSL3_AL_FATAL,
1701                                                 SSL_AD_HANDSHAKE_FAILURE);
1702                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1703                                                 kssl_err.reason);
1704                                 goto err;
1705                                 }
1706
1707                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
1708                         **  in place of RFC 2712 KerberosWrapper, as in:
1709                         **
1710                         **  Send ticket (copy to *p, set n = length)
1711                         **  n = krb5_ap_req.length;
1712                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1713                         **  if (krb5_ap_req.data)
1714                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1715                         **
1716                         **  Now using real RFC 2712 KerberosWrapper
1717                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1718                         **  Note: 2712 "opaque" types are here replaced
1719                         **  with a 2-byte length followed by the value.
1720                         **  Example:
1721                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1722                         **  Where "xx xx" = length bytes.  Shown here with
1723                         **  optional authenticator omitted.
1724                         */
1725
1726                         /*  KerberosWrapper.Ticket              */
1727                         s2n(enc_ticket->length,p);
1728                         memcpy(p, enc_ticket->data, enc_ticket->length);
1729                         p+= enc_ticket->length;
1730                         n = enc_ticket->length + 2;
1731
1732                         /*  KerberosWrapper.Authenticator       */
1733                         if (authp  &&  authp->length)
1734                                 {
1735                                 s2n(authp->length,p);
1736                                 memcpy(p, authp->data, authp->length);
1737                                 p+= authp->length;
1738                                 n+= authp->length + 2;
1739
1740                                 free(authp->data);
1741                                 authp->data = NULL;
1742                                 authp->length = 0;
1743                                 }
1744                         else
1745                                 {
1746                                 s2n(0,p);/*  null authenticator length  */
1747                                 n+=2;
1748                                 }
1749
1750                         if (RAND_bytes(tmp_buf,SSL_MAX_MASTER_KEY_LENGTH) <= 0)
1751                             goto err;
1752
1753                         /*  20010420 VRS.  Tried it this way; failed.
1754                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1755                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1756                         **                              kssl_ctx->length);
1757                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1758                         */
1759
1760                         memset(iv, 0, EVP_MAX_IV_LENGTH);  /* per RFC 1510 */
1761                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1762                                 kssl_ctx->key,iv);
1763                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1764                                 SSL_MAX_MASTER_KEY_LENGTH);
1765                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1766                         outl += padl;
1767                         if (outl > sizeof epms)
1768                                 {
1769                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1770                                 goto err;
1771                                 }
1772                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1773
1774                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
1775                         s2n(outl,p);
1776                         memcpy(p, epms, outl);
1777                         p+=outl;
1778                         n+=outl + 2;
1779
1780                         s->session->master_key_length=
1781                                 s->method->ssl3_enc->generate_master_secret(s,
1782                                         s->session->master_key,
1783                                         tmp_buf, SSL_MAX_MASTER_KEY_LENGTH);
1784
1785                         memset(tmp_buf, 0, SSL_MAX_MASTER_KEY_LENGTH);
1786                         memset(epms, 0, outl);
1787                         }
1788 #endif
1789 #ifndef OPENSSL_NO_DH
1790                 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1791                         {
1792                         DH *dh_srvr,*dh_clnt;
1793
1794                         if (s->session->sess_cert->peer_dh_tmp != NULL)
1795                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1796                         else
1797                                 {
1798                                 /* we get them from the cert */
1799                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1800                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1801                                 goto err;
1802                                 }
1803
1804                         /* generate a new random key */
1805                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1806                                 {
1807                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1808                                 goto err;
1809                                 }
1810                         if (!DH_generate_key(dh_clnt))
1811                                 {
1812                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1813                                 goto err;
1814                                 }
1815
1816                         /* use the 'p' output buffer for the DH key, but
1817                          * make sure to clear it out afterwards */
1818
1819                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1820
1821                         if (n <= 0)
1822                                 {
1823                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1824                                 goto err;
1825                                 }
1826
1827                         /* generate master key from the result */
1828                         s->session->master_key_length=
1829                                 s->method->ssl3_enc->generate_master_secret(s,
1830                                         s->session->master_key,p,n);
1831                         /* clean up */
1832                         memset(p,0,n);
1833
1834                         /* send off the data */
1835                         n=BN_num_bytes(dh_clnt->pub_key);
1836                         s2n(n,p);
1837                         BN_bn2bin(dh_clnt->pub_key,p);
1838                         n+=2;
1839
1840                         DH_free(dh_clnt);
1841
1842                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
1843                         }
1844 #endif
1845
1846 #ifndef OPENSSL_NO_ECDH
1847                 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
1848                         {
1849                         EC_GROUP *srvr_group = NULL;
1850                         int ecdh_clnt_cert = 0;
1851
1852                         /* Did we send out the client's
1853                          * ECDH share for use in premaster
1854                          * computation as part of client certificate?
1855                          * If so, set ecdh_clnt_cert to 1.
1856                          */
1857                         if ((l & SSL_kECDH) && (s->cert != NULL))
1858                                 {
1859                                 /* XXX: For now, we do not support client
1860                                  * authentication using ECDH certificates.
1861                                  * To add such support, one needs to add
1862                                  * code that checks for appropriate
1863                                  * conditions and sets ecdh_clnt_cert to 1.
1864                                  * For example, the cert have an ECC
1865                                  * key on the same curve as the server's
1866                                  * and the key should be authorized for
1867                                  * key agreement.
1868                                  *
1869                                  * One also needs to add code in ssl3_connect
1870                                  * to skip sending the certificate verify
1871                                  * message.
1872                                  *
1873                                  * if ((s->cert->key->privatekey != NULL) &&
1874                                  *     (s->cert->key->privatekey->type ==
1875                                  *      EVP_PKEY_EC) && ...)
1876                                  * ecdh_clnt_cert = 1;
1877                                  */
1878                                 }
1879
1880                         if (s->session->sess_cert->peer_ecdh_tmp != NULL)
1881                                 {
1882                                 srvr_group = s->session->sess_cert-> \
1883                                     peer_ecdh_tmp->group;
1884                                 srvr_ecpoint = s->session->sess_cert-> \
1885                                     peer_ecdh_tmp->pub_key;
1886                                 }
1887                         else
1888                                 {
1889                                 /* Get the Server Public Key from Cert */
1890                                 srvr_pub_pkey = X509_get_pubkey(s->session-> \
1891                                     sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1892                                 if ((srvr_pub_pkey == NULL) ||
1893                                     (srvr_pub_pkey->type != EVP_PKEY_EC) ||
1894                                     (srvr_pub_pkey->pkey.eckey == NULL))
1895                                         {
1896                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1897                                             ERR_R_INTERNAL_ERROR);
1898                                         goto err;
1899                                         }
1900
1901                                 srvr_group = srvr_pub_pkey->pkey.eckey->group;
1902                                 srvr_ecpoint =
1903                                     srvr_pub_pkey->pkey.eckey->pub_key;
1904                                 }
1905
1906                         if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
1907                                 {
1908                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1909                                     ERR_R_INTERNAL_ERROR);
1910                                 goto err;
1911                                 }
1912
1913                         if ((clnt_ecdh=EC_KEY_new()) == NULL)
1914                                 {
1915                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1916                                 goto err;
1917                                 }
1918
1919                         clnt_ecdh->group = srvr_group;
1920                         if (ecdh_clnt_cert)
1921                                 {
1922                                 /* Reuse key info from our certificate
1923                                  * We only need our private key to perform
1924                                  * the ECDH computation.
1925                                  */
1926                                 clnt_ecdh->priv_key = BN_dup(s->cert->key-> \
1927                                     privatekey->pkey.eckey->priv_key);
1928                                 }
1929                         else
1930                                 {
1931                                 /* Generate a new ECDH key pair */
1932                                 if (!(EC_KEY_generate_key(clnt_ecdh)))
1933                                         {
1934                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
1935                                         goto err;
1936                                         }
1937                                 }
1938
1939                         /* use the 'p' output buffer for the ECDH key, but
1940                          * make sure to clear it out afterwards
1941                          */
1942
1943                         n=ECDH_compute_key(p, srvr_ecpoint, clnt_ecdh);
1944                         if (n <= 0)
1945                                 {
1946                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1947                                        ERR_R_ECDH_LIB);
1948                                 goto err;
1949                                 }
1950
1951                         /* generate master key from the result */
1952                         s->session->master_key_length = s->method->ssl3_enc \
1953                             -> generate_master_secret(s,
1954                                 s->session->master_key,
1955                                 p, n);
1956
1957                         memset(p, 0, n); /* clean up */
1958
1959                         if (ecdh_clnt_cert)
1960                                 {
1961                                 /* Send empty client key exch message */
1962                                 n = 0;
1963                                 }
1964                         else
1965                                 {
1966                                 /* First check the size of encoding and
1967                                  * allocate memory accordingly.
1968                                  */
1969                                 encoded_pt_len =
1970                                     EC_POINT_point2oct(clnt_ecdh->group,
1971                                         clnt_ecdh->pub_key,
1972                                         POINT_CONVERSION_UNCOMPRESSED,
1973                                         NULL, 0, NULL);
1974
1975                                 encodedPoint = (unsigned char *)
1976                                     OPENSSL_malloc(encoded_pt_len *
1977                                         sizeof(unsigned char));
1978                                 bn_ctx = BN_CTX_new();
1979                                 if ((encodedPoint == NULL) ||
1980                                     (bn_ctx == NULL))
1981                                         {
1982                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1983                                         goto err;
1984                                         }
1985
1986                                 /* Encode the public key */
1987                                 n = EC_POINT_point2oct(clnt_ecdh->group,
1988                                     clnt_ecdh->pub_key,
1989                                     POINT_CONVERSION_UNCOMPRESSED,
1990                                     encodedPoint, encoded_pt_len, bn_ctx);
1991
1992                                 *p = n; /* length of encoded point */
1993                                 /* Encoded point will be copied here */
1994                                 p += 1;
1995                                 /* copy the point */
1996                                 memcpy((unsigned char *)p, encodedPoint, n);
1997                                 /* increment n to account for length field */
1998                                 n += 1;
1999                                 }
2000
2001                         /* Free allocated memory */
2002                         BN_CTX_free(bn_ctx);
2003                         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2004                         if (clnt_ecdh != NULL)
2005                                 {
2006                                  /* group is shared */
2007                                  clnt_ecdh->group = NULL;
2008                                  EC_KEY_free(clnt_ecdh);
2009                                 }
2010                         EVP_PKEY_free(srvr_pub_pkey);
2011                         }
2012 #endif /* !OPENSSL_NO_ECDH */
2013                 else
2014                         {
2015                         ssl3_send_alert(s, SSL3_AL_FATAL,
2016                             SSL_AD_HANDSHAKE_FAILURE);
2017                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2018                             ERR_R_INTERNAL_ERROR);
2019                         goto err;
2020                         }
2021
2022                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2023                 l2n3(n,d);
2024
2025                 s->state=SSL3_ST_CW_KEY_EXCH_B;
2026                 /* number of bytes to write */
2027                 s->init_num=n+4;
2028                 s->init_off=0;
2029                 }
2030
2031         /* SSL3_ST_CW_KEY_EXCH_B */
2032         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2033 err:
2034 #ifndef OPENSSL_NO_ECDH
2035         BN_CTX_free(bn_ctx);
2036         if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2037         if (clnt_ecdh != NULL)
2038                 {
2039                 /* group is shared */
2040                 clnt_ecdh->group = NULL;
2041                 EC_KEY_free(clnt_ecdh);
2042                 }
2043         EVP_PKEY_free(srvr_pub_pkey);
2044 #endif
2045         return(-1);
2046         }
2047
2048 static int ssl3_send_client_verify(SSL *s)
2049         {
2050         unsigned char *p,*d;
2051         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2052         EVP_PKEY *pkey;
2053 #ifndef OPENSSL_NO_RSA
2054         unsigned u=0;
2055 #endif
2056         unsigned long n;
2057 #ifndef OPENSSL_NO_DSA
2058         int j;
2059 #endif
2060
2061         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2062                 {
2063                 d=(unsigned char *)s->init_buf->data;
2064                 p= &(d[4]);
2065                 pkey=s->cert->key->privatekey;
2066
2067                 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2068                         &(data[MD5_DIGEST_LENGTH]));
2069
2070 #ifndef OPENSSL_NO_RSA
2071                 if (pkey->type == EVP_PKEY_RSA)
2072                         {
2073                         s->method->ssl3_enc->cert_verify_mac(s,
2074                                 &(s->s3->finish_dgst1),&(data[0]));
2075                         if (RSA_sign(NID_md5_sha1, data,
2076                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2077                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2078                                 {
2079                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2080                                 goto err;
2081                                 }
2082                         s2n(u,p);
2083                         n=u+2;
2084                         }
2085                 else
2086 #endif
2087 #ifndef OPENSSL_NO_DSA
2088                         if (pkey->type == EVP_PKEY_DSA)
2089                         {
2090                         if (!DSA_sign(pkey->save_type,
2091                                 &(data[MD5_DIGEST_LENGTH]),
2092                                 SHA_DIGEST_LENGTH,&(p[2]),
2093                                 (unsigned int *)&j,pkey->pkey.dsa))
2094                                 {
2095                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2096                                 goto err;
2097                                 }
2098                         s2n(j,p);
2099                         n=j+2;
2100                         }
2101                 else
2102 #endif
2103 #ifndef OPENSSL_NO_ECDSA
2104                         if (pkey->type == EVP_PKEY_EC)
2105                         {
2106                         if (!ECDSA_sign(pkey->save_type,
2107                                 &(data[MD5_DIGEST_LENGTH]),
2108                                 SHA_DIGEST_LENGTH,&(p[2]),
2109                                 (unsigned int *)&j,pkey->pkey.eckey))
2110                                 {
2111                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2112                                     ERR_R_ECDSA_LIB);
2113                                 goto err;
2114                                 }
2115                         s2n(j,p);
2116                         n=j+2;
2117                         }
2118                 else
2119 #endif
2120                         {
2121                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2122                         goto err;
2123                         }
2124                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2125                 l2n3(n,d);
2126
2127                 s->init_num=(int)n+4;
2128                 s->init_off=0;
2129                 }
2130         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2131 err:
2132         return(-1);
2133         }
2134
2135 static int ssl3_send_client_certificate(SSL *s)
2136         {
2137         X509 *x509=NULL;
2138         EVP_PKEY *pkey=NULL;
2139         int i;
2140         unsigned long l;
2141
2142         if (s->state == SSL3_ST_CW_CERT_A)
2143                 {
2144                 if ((s->cert == NULL) ||
2145                         (s->cert->key->x509 == NULL) ||
2146                         (s->cert->key->privatekey == NULL))
2147                         s->state=SSL3_ST_CW_CERT_B;
2148                 else
2149                         s->state=SSL3_ST_CW_CERT_C;
2150                 }
2151
2152         /* We need to get a client cert */
2153         if (s->state == SSL3_ST_CW_CERT_B)
2154                 {
2155                 /* If we get an error, we need to
2156                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2157                  * We then get retied later */
2158                 i=0;
2159                 if (s->ctx->client_cert_cb != NULL)
2160                         i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2161                 if (i < 0)
2162                         {
2163                         s->rwstate=SSL_X509_LOOKUP;
2164                         return(-1);
2165                         }
2166                 s->rwstate=SSL_NOTHING;
2167                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2168                         {
2169                         s->state=SSL3_ST_CW_CERT_B;
2170                         if (    !SSL_use_certificate(s,x509) ||
2171                                 !SSL_use_PrivateKey(s,pkey))
2172                                 i=0;
2173                         }
2174                 else if (i == 1)
2175                         {
2176                         i=0;
2177                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2178                         }
2179
2180                 if (x509 != NULL) X509_free(x509);
2181                 if (pkey != NULL) EVP_PKEY_free(pkey);
2182                 if (i == 0)
2183                         {
2184                         if (s->version == SSL3_VERSION)
2185                                 {
2186                                 s->s3->tmp.cert_req=0;
2187                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2188                                 return(1);
2189                                 }
2190                         else
2191                                 {
2192                                 s->s3->tmp.cert_req=2;
2193                                 }
2194                         }
2195
2196                 /* Ok, we have a cert */
2197                 s->state=SSL3_ST_CW_CERT_C;
2198                 }
2199
2200         if (s->state == SSL3_ST_CW_CERT_C)
2201                 {
2202                 s->state=SSL3_ST_CW_CERT_D;
2203                 l=ssl3_output_cert_chain(s,
2204                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2205                 s->init_num=(int)l;
2206                 s->init_off=0;
2207                 }
2208         /* SSL3_ST_CW_CERT_D */
2209         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2210         }
2211
2212 #define has_bits(i,m)   (((i)&(m)) == (m))
2213
2214 static int ssl3_check_cert_and_algorithm(SSL *s)
2215         {
2216         int i,idx;
2217         long algs;
2218         EVP_PKEY *pkey=NULL;
2219         SESS_CERT *sc;
2220 #ifndef OPENSSL_NO_RSA
2221         RSA *rsa;
2222 #endif
2223 #ifndef OPENSSL_NO_DH
2224         DH *dh;
2225 #endif
2226
2227         sc=s->session->sess_cert;
2228
2229         if (sc == NULL)
2230                 {
2231                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2232                 goto err;
2233                 }
2234
2235         algs=s->s3->tmp.new_cipher->algorithms;
2236
2237         /* we don't have a certificate */
2238         if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2239                 return(1);
2240
2241 #ifndef OPENSSL_NO_RSA
2242         rsa=s->session->sess_cert->peer_rsa_tmp;
2243 #endif
2244 #ifndef OPENSSL_NO_DH
2245         dh=s->session->sess_cert->peer_dh_tmp;
2246 #endif
2247
2248         /* This is the passed certificate */
2249
2250         idx=sc->peer_cert_type;
2251 #ifndef OPENSSL_NO_ECDH
2252         if (idx == SSL_PKEY_ECC)
2253                 {
2254                 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2255                     s->s3->tmp.new_cipher) == 0)
2256                         { /* check failed */
2257                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2258                         goto f_err;
2259                         }
2260                 else
2261                         {
2262                         return 1;
2263                         }
2264                 }
2265 #endif
2266         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2267         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2268         EVP_PKEY_free(pkey);
2269
2270
2271         /* Check that we have a certificate if we require one */
2272         if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2273                 {
2274                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2275                 goto f_err;
2276                 }
2277 #ifndef OPENSSL_NO_DSA
2278         else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2279                 {
2280                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2281                 goto f_err;
2282                 }
2283 #endif
2284 #ifndef OPENSSL_NO_RSA
2285         if ((algs & SSL_kRSA) &&
2286                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2287                 {
2288                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2289                 goto f_err;
2290                 }
2291 #endif
2292 #ifndef OPENSSL_NO_DH
2293         if ((algs & SSL_kEDH) &&
2294                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2295                 {
2296                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2297                 goto f_err;
2298                 }
2299         else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2300                 {
2301                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2302                 goto f_err;
2303                 }
2304 #ifndef OPENSSL_NO_DSA
2305         else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2306                 {
2307                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2308                 goto f_err;
2309                 }
2310 #endif
2311 #endif
2312
2313         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2314                 {
2315 #ifndef OPENSSL_NO_RSA
2316                 if (algs & SSL_kRSA)
2317                         {
2318                         if (rsa == NULL
2319                             || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2320                                 {
2321                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2322                                 goto f_err;
2323                                 }
2324                         }
2325                 else
2326 #endif
2327 #ifndef OPENSSL_NO_DH
2328                         if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2329                             {
2330                             if (dh == NULL
2331                                 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2332                                 {
2333                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2334                                 goto f_err;
2335                                 }
2336                         }
2337                 else
2338 #endif
2339                         {
2340                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2341                         goto f_err;
2342                         }
2343                 }
2344         return(1);
2345 f_err:
2346         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2347 err:
2348         return(0);
2349         }
2350
2351
2352 #ifndef OPENSSL_NO_ECDH
2353 /* This is the complement of nid2curve_id in s3_srvr.c. */
2354 static int curve_id2nid(int curve_id)
2355 {
2356         /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) */
2357         static int nid_list[26] =
2358         {
2359                 0,
2360                 NID_sect163k1, /* sect163k1 (1) */
2361                 NID_sect163r1, /* sect163r1 (2) */
2362                 NID_sect163r2, /* sect163r2 (3) */
2363                 NID_sect193r1, /* sect193r1 (4) */
2364                 NID_sect193r2, /* sect193r2 (5) */
2365                 NID_sect233k1, /* sect233k1 (6) */
2366                 NID_sect233r1, /* sect233r1 (7) */
2367                 NID_sect239k1, /* sect239k1 (8) */
2368                 NID_sect283k1, /* sect283k1 (9) */
2369                 NID_sect283r1, /* sect283r1 (10) */
2370                 NID_sect409k1, /* sect409k1 (11) */
2371                 NID_sect409r1, /* sect409r1 (12) */
2372                 NID_sect571k1, /* sect571k1 (13) */
2373                 NID_sect571r1, /* sect571r1 (14) */
2374                 NID_secp160k1, /* secp160k1 (15) */
2375                 NID_secp160r1, /* secp160r1 (16) */
2376                 NID_secp160r2, /* secp160r2 (17) */
2377                 NID_secp192k1, /* secp192k1 (18) */
2378                 NID_X9_62_prime192v1, /* secp192r1 (19) */
2379                 NID_secp224k1, /* secp224k1 (20) */
2380                 NID_secp224r1, /* secp224r1 (21) */
2381                 NID_secp256k1, /* secp256k1 (22) */
2382                 NID_X9_62_prime256v1, /* secp256r1 (23) */
2383                 NID_secp384r1, /* secp384r1 (24) */
2384                 NID_secp521r1  /* secp521r1 (25) */
2385         };
2386
2387         if ((curve_id < 1) || (curve_id > 25)) return 0;
2388
2389         return nid_list[curve_id];
2390 }
2391 #endif