crypto/openssl/ssl/s3_clnt.c

   1 /* ssl/s3_clnt.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2002 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 #include <stdio.h>
 113 #include <openssl/buffer.h>
 114 #include <openssl/rand.h>
 115 #include <openssl/objects.h>
 116 #include <openssl/md5.h>
 117 #include <openssl/sha.h>
 118 #include <openssl/evp.h>
 119 #include "ssl_locl.h"
 120
 121 static SSL_METHOD *ssl3_get_client_method(int ver);
 122 static int ssl3_client_hello(SSL *s);
 123 static int ssl3_get_server_hello(SSL *s);
 124 static int ssl3_get_certificate_request(SSL *s);
 125 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
 126 static int ssl3_get_server_done(SSL *s);
 127 static int ssl3_send_client_verify(SSL *s);
 128 static int ssl3_send_client_certificate(SSL *s);
 129 static int ssl3_send_client_key_exchange(SSL *s);
 130 static int ssl3_get_key_exchange(SSL *s);
 131 static int ssl3_get_server_certificate(SSL *s);
 132 static int ssl3_check_cert_and_algorithm(SSL *s);
 133 static SSL_METHOD *ssl3_get_client_method(int ver)
 134         {
 135         if (ver == SSL3_VERSION)
 136                 return(SSLv3_client_method());
 137         else
 138                 return(NULL);
 139         }
 140
 141 SSL_METHOD *SSLv3_client_method(void)
 142         {
 143         static int init=1;
 144         static SSL_METHOD SSLv3_client_data;
 145
 146         if (init)
 147                 {
 148                 init=0;
 149                 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
 150                         sizeof(SSL_METHOD));
 151                 SSLv3_client_data.ssl_connect=ssl3_connect;
 152                 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
 153                 }
 154         return(&SSLv3_client_data);
 155         }
 156
 157 int ssl3_connect(SSL *s)
 158         {
 159         BUF_MEM *buf;
 160         unsigned long Time=time(NULL),l;
 161         long num1;
 162         void (*cb)()=NULL;
 163         int ret= -1;
 164         int new_state,state,skip=0;;
 165
 166         RAND_add(&Time,sizeof(Time),0);
 167         ERR_clear_error();
 168         clear_sys_error();
 169
 170         if (s->info_callback != NULL)
 171                 cb=s->info_callback;
 172         else if (s->ctx->info_callback != NULL)
 173                 cb=s->ctx->info_callback;
 174
 175         s->in_handshake++;
 176         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 177
 178         for (;;)
 179                 {
 180                 state=s->state;
 181
 182                 switch(s->state)
 183                         {
 184                 case SSL_ST_RENEGOTIATE:
 185                         s->new_session=1;
 186                         s->state=SSL_ST_CONNECT;
 187                         s->ctx->stats.sess_connect_renegotiate++;
 188                         /* break */
 189                 case SSL_ST_BEFORE:
 190                 case SSL_ST_CONNECT:
 191                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 192                 case SSL_ST_OK|SSL_ST_CONNECT:
 193
 194                         s->server=0;
 195                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 196
 197                         if ((s->version & 0xff00 ) != 0x0300)
 198                                 {
 199                                 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_INTERNAL_ERROR);
 200                                 ret = -1;
 201                                 goto end;
 202                                 }
 203
 204                         /* s->version=SSL3_VERSION; */
 205                         s->type=SSL_ST_CONNECT;
 206
 207                         if (s->init_buf == NULL)
 208                                 {
 209                                 if ((buf=BUF_MEM_new()) == NULL)
 210                                         {
 211                                         ret= -1;
 212                                         goto end;
 213                                         }
 214                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 215                                         {
 216                                         ret= -1;
 217                                         goto end;
 218                                         }
 219                                 s->init_buf=buf;
 220                                 }
 221
 222                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 223
 224                         /* setup buffing BIO */
 225                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
 226
 227                         /* don't push the buffering BIO quite yet */
 228
 229                         ssl3_init_finished_mac(s);
 230
 231                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
 232                         s->ctx->stats.sess_connect++;
 233                         s->init_num=0;
 234                         break;
 235
 236                 case SSL3_ST_CW_CLNT_HELLO_A:
 237                 case SSL3_ST_CW_CLNT_HELLO_B:
 238
 239                         s->shutdown=0;
 240                         ret=ssl3_client_hello(s);
 241                         if (ret <= 0) goto end;
 242                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
 243                         s->init_num=0;
 244
 245                         /* turn on buffering for the next lot of output */
 246                         if (s->bbio != s->wbio)
 247                                 s->wbio=BIO_push(s->bbio,s->wbio);
 248
 249                         break;
 250
 251                 case SSL3_ST_CR_SRVR_HELLO_A:
 252                 case SSL3_ST_CR_SRVR_HELLO_B:
 253                         ret=ssl3_get_server_hello(s);
 254                         if (ret <= 0) goto end;
 255                         if (s->hit)
 256                                 s->state=SSL3_ST_CR_FINISHED_A;
 257                         else
 258                                 s->state=SSL3_ST_CR_CERT_A;
 259                         s->init_num=0;
 260                         break;
 261
 262                 case SSL3_ST_CR_CERT_A:
 263                 case SSL3_ST_CR_CERT_B:
 264                         /* Check if it is anon DH */
 265                         if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
 266                                 {
 267                                 ret=ssl3_get_server_certificate(s);
 268                                 if (ret <= 0) goto end;
 269                                 }
 270                         else
 271                                 skip=1;
 272                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 273                         s->init_num=0;
 274                         break;
 275
 276                 case SSL3_ST_CR_KEY_EXCH_A:
 277                 case SSL3_ST_CR_KEY_EXCH_B:
 278                         ret=ssl3_get_key_exchange(s);
 279                         if (ret <= 0) goto end;
 280                         s->state=SSL3_ST_CR_CERT_REQ_A;
 281                         s->init_num=0;
 282
 283                         /* at this point we check that we have the
 284                          * required stuff from the server */
 285                         if (!ssl3_check_cert_and_algorithm(s))
 286                                 {
 287                                 ret= -1;
 288                                 goto end;
 289                                 }
 290                         break;
 291
 292                 case SSL3_ST_CR_CERT_REQ_A:
 293                 case SSL3_ST_CR_CERT_REQ_B:
 294                         ret=ssl3_get_certificate_request(s);
 295                         if (ret <= 0) goto end;
 296                         s->state=SSL3_ST_CR_SRVR_DONE_A;
 297                         s->init_num=0;
 298                         break;
 299
 300                 case SSL3_ST_CR_SRVR_DONE_A:
 301                 case SSL3_ST_CR_SRVR_DONE_B:
 302                         ret=ssl3_get_server_done(s);
 303                         if (ret <= 0) goto end;
 304                         if (s->s3->tmp.cert_req)
 305                                 s->state=SSL3_ST_CW_CERT_A;
 306                         else
 307                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
 308                         s->init_num=0;
 309
 310                         break;
 311
 312                 case SSL3_ST_CW_CERT_A:
 313                 case SSL3_ST_CW_CERT_B:
 314                 case SSL3_ST_CW_CERT_C:
 315                 case SSL3_ST_CW_CERT_D:
 316                         ret=ssl3_send_client_certificate(s);
 317                         if (ret <= 0) goto end;
 318                         s->state=SSL3_ST_CW_KEY_EXCH_A;
 319                         s->init_num=0;
 320                         break;
 321
 322                 case SSL3_ST_CW_KEY_EXCH_A:
 323                 case SSL3_ST_CW_KEY_EXCH_B:
 324                         ret=ssl3_send_client_key_exchange(s);
 325                         if (ret <= 0) goto end;
 326                         l=s->s3->tmp.new_cipher->algorithms;
 327                         /* EAY EAY EAY need to check for DH fix cert
 328                          * sent back */
 329                         /* For TLS, cert_req is set to 2, so a cert chain
 330                          * of nothing is sent, but no verify packet is sent */
 331                         if (s->s3->tmp.cert_req == 1)
 332                                 {
 333                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
 334                                 }
 335                         else
 336                                 {
 337                                 s->state=SSL3_ST_CW_CHANGE_A;
 338                                 s->s3->change_cipher_spec=0;
 339                                 }
 340
 341                         s->init_num=0;
 342                         break;
 343
 344                 case SSL3_ST_CW_CERT_VRFY_A:
 345                 case SSL3_ST_CW_CERT_VRFY_B:
 346                         ret=ssl3_send_client_verify(s);
 347                         if (ret <= 0) goto end;
 348                         s->state=SSL3_ST_CW_CHANGE_A;
 349                         s->init_num=0;
 350                         s->s3->change_cipher_spec=0;
 351                         break;
 352
 353                 case SSL3_ST_CW_CHANGE_A:
 354                 case SSL3_ST_CW_CHANGE_B:
 355                         ret=ssl3_send_change_cipher_spec(s,
 356                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
 357                         if (ret <= 0) goto end;
 358                         s->state=SSL3_ST_CW_FINISHED_A;
 359                         s->init_num=0;
 360
 361                         s->session->cipher=s->s3->tmp.new_cipher;
 362                         if (s->s3->tmp.new_compression == NULL)
 363                                 s->session->compress_meth=0;
 364                         else
 365                                 s->session->compress_meth=
 366                                         s->s3->tmp.new_compression->id;
 367                         if (!s->method->ssl3_enc->setup_key_block(s))
 368                                 {
 369                                 ret= -1;
 370                                 goto end;
 371                                 }
 372
 373                         if (!s->method->ssl3_enc->change_cipher_state(s,
 374                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
 375                                 {
 376                                 ret= -1;
 377                                 goto end;
 378                                 }
 379
 380                         break;
 381
 382                 case SSL3_ST_CW_FINISHED_A:
 383                 case SSL3_ST_CW_FINISHED_B:
 384                         ret=ssl3_send_finished(s,
 385                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
 386                                 s->method->ssl3_enc->client_finished_label,
 387                                 s->method->ssl3_enc->client_finished_label_len);
 388                         if (ret <= 0) goto end;
 389                         s->state=SSL3_ST_CW_FLUSH;
 390
 391                         /* clear flags */
 392                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 393                         if (s->hit)
 394                                 {
 395                                 s->s3->tmp.next_state=SSL_ST_OK;
 396                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
 397                                         {
 398                                         s->state=SSL_ST_OK;
 399                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
 400                                         s->s3->delay_buf_pop_ret=0;
 401                                         }
 402                                 }
 403                         else
 404                                 {
 405                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
 406                                 }
 407                         s->init_num=0;
 408                         break;
 409
 410                 case SSL3_ST_CR_FINISHED_A:
 411                 case SSL3_ST_CR_FINISHED_B:
 412
 413                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 414                                 SSL3_ST_CR_FINISHED_B);
 415                         if (ret <= 0) goto end;
 416
 417                         if (s->hit)
 418                                 s->state=SSL3_ST_CW_CHANGE_A;
 419                         else
 420                                 s->state=SSL_ST_OK;
 421                         s->init_num=0;
 422                         break;
 423
 424                 case SSL3_ST_CW_FLUSH:
 425                         /* number of bytes to be flushed */
 426                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
 427                         if (num1 > 0)
 428                                 {
 429                                 s->rwstate=SSL_WRITING;
 430                                 num1=BIO_flush(s->wbio);
 431                                 if (num1 <= 0) { ret= -1; goto end; }
 432                                 s->rwstate=SSL_NOTHING;
 433                                 }
 434
 435                         s->state=s->s3->tmp.next_state;
 436                         break;
 437
 438                 case SSL_ST_OK:
 439                         /* clean a few things up */
 440                         ssl3_cleanup_key_block(s);
 441
 442                         if (s->init_buf != NULL)
 443                                 {
 444                                 BUF_MEM_free(s->init_buf);
 445                                 s->init_buf=NULL;
 446                                 }
 447
 448                         /* If we are not 'joining' the last two packets,
 449                          * remove the buffering now */
 450                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 451                                 ssl_free_wbio_buffer(s);
 452                         /* else do it later in ssl3_write */
 453
 454                         s->init_num=0;
 455                         s->new_session=0;
 456
 457                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 458                         if (s->hit) s->ctx->stats.sess_hit++;
 459
 460                         ret=1;
 461                         /* s->server=0; */
 462                         s->handshake_func=ssl3_connect;
 463                         s->ctx->stats.sess_connect_good++;
 464
 465                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 466
 467                         goto end;
 468                         /* break; */
 469
 470                 default:
 471                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 472                         ret= -1;
 473                         goto end;
 474                         /* break; */
 475                         }
 476
 477                 /* did we do anything */
 478                 if (!s->s3->tmp.reuse_message && !skip)
 479                         {
 480                         if (s->debug)
 481                                 {
 482                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 483                                         goto end;
 484                                 }
 485
 486                         if ((cb != NULL) && (s->state != state))
 487                                 {
 488                                 new_state=s->state;
 489                                 s->state=state;
 490                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 491                                 s->state=new_state;
 492                                 }
 493                         }
 494                 skip=0;
 495                 }
 496 end:
 497         s->in_handshake--;
 498         if (cb != NULL)
 499                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 500         return(ret);
 501         }
 502
 503
 504 static int ssl3_client_hello(SSL *s)
 505         {
 506         unsigned char *buf;
 507         unsigned char *p,*d;
 508         int i,j;
 509         unsigned long Time,l;
 510         SSL_COMP *comp;
 511
 512         buf=(unsigned char *)s->init_buf->data;
 513         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 514                 {
 515                 if ((s->session == NULL) ||
 516                         (s->session->ssl_version != s->version) ||
 517                         (s->session->not_resumable))
 518                         {
 519                         if (!ssl_get_new_session(s,0))
 520                                 goto err;
 521                         }
 522                 /* else use the pre-loaded session */
 523
 524                 p=s->s3->client_random;
 525                 Time=time(NULL);                        /* Time */
 526                 l2n(Time,p);
 527                 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
 528
 529                 /* Do the message type and length last */
 530                 d=p= &(buf[4]);
 531
 532                 *(p++)=s->version>>8;
 533                 *(p++)=s->version&0xff;
 534                 s->client_version=s->version;
 535
 536                 /* Random stuff */
 537                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 538                 p+=SSL3_RANDOM_SIZE;
 539
 540                 /* Session ID */
 541                 if (s->new_session)
 542                         i=0;
 543                 else
 544                         i=s->session->session_id_length;
 545                 *(p++)=i;
 546                 if (i != 0)
 547                         {
 548                         memcpy(p,s->session->session_id,i);
 549                         p+=i;
 550                         }
 551
 552                 /* Ciphers supported */
 553                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
 554                 if (i == 0)
 555                         {
 556                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 557                         goto err;
 558                         }
 559                 s2n(i,p);
 560                 p+=i;
 561
 562                 /* COMPRESSION */
 563                 if (s->ctx->comp_methods == NULL)
 564                         j=0;
 565                 else
 566                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 567                 *(p++)=1+j;
 568                 for (i=0; i<j; i++)
 569                         {
 570                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 571                         *(p++)=comp->id;
 572                         }
 573                 *(p++)=0; /* Add the NULL method */
 574
 575                 l=(p-d);
 576                 d=buf;
 577                 *(d++)=SSL3_MT_CLIENT_HELLO;
 578                 l2n3(l,d);
 579
 580                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 581                 /* number of bytes to write */
 582                 s->init_num=p-buf;
 583                 s->init_off=0;
 584                 }
 585
 586         /* SSL3_ST_CW_CLNT_HELLO_B */
 587         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 588 err:
 589         return(-1);
 590         }
 591
 592 static int ssl3_get_server_hello(SSL *s)
 593         {
 594         STACK_OF(SSL_CIPHER) *sk;
 595         SSL_CIPHER *c;
 596         unsigned char *p,*d;
 597         int i,al,ok;
 598         unsigned int j;
 599         long n;
 600         SSL_COMP *comp;
 601
 602         n=ssl3_get_message(s,
 603                 SSL3_ST_CR_SRVR_HELLO_A,
 604                 SSL3_ST_CR_SRVR_HELLO_B,
 605                 SSL3_MT_SERVER_HELLO,
 606                 300, /* ?? */
 607                 &ok);
 608
 609         if (!ok) return((int)n);
 610         d=p=(unsigned char *)s->init_buf->data;
 611
 612         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 613                 {
 614                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 615                 s->version=(s->version&0xff00)|p[1];
 616                 al=SSL_AD_PROTOCOL_VERSION;
 617                 goto f_err;
 618                 }
 619         p+=2;
 620
 621         /* load the server hello data */
 622         /* load the server random */
 623         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 624         p+=SSL3_RANDOM_SIZE;
 625
 626         /* get the session-id */
 627         j= *(p++);
 628
 629         if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
 630                 {
 631                 /* SSLref returns 16 :-( */
 632                 if (j < SSL2_SSL_SESSION_ID_LENGTH)
 633                         {
 634                         al=SSL_AD_ILLEGAL_PARAMETER;
 635                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
 636                         goto f_err;
 637                         }
 638                 }
 639         if (j != 0 && j == s->session->session_id_length
 640             && memcmp(p,s->session->session_id,j) == 0)
 641             {
 642             if(s->sid_ctx_length != s->session->sid_ctx_length
 643                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 644                 {
 645                 al=SSL_AD_ILLEGAL_PARAMETER;
 646                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 647                 goto f_err;
 648                 }
 649             s->hit=1;
 650             }
 651         else    /* a miss or crap from the other end */
 652                 {
 653                 /* If we were trying for session-id reuse, make a new
 654                  * SSL_SESSION so we don't stuff up other people */
 655                 s->hit=0;
 656                 if (s->session->session_id_length > 0)
 657                         {
 658                         if (!ssl_get_new_session(s,0))
 659                                 {
 660                                 al=SSL_AD_INTERNAL_ERROR;
 661                                 goto f_err;
 662                                 }
 663                         }
 664                 s->session->session_id_length=j;
 665                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 666                 }
 667         p+=j;
 668         c=ssl_get_cipher_by_char(s,p);
 669         if (c == NULL)
 670                 {
 671                 /* unknown cipher */
 672                 al=SSL_AD_ILLEGAL_PARAMETER;
 673                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 674                 goto f_err;
 675                 }
 676         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 677
 678         sk=ssl_get_ciphers_by_id(s);
 679         i=sk_SSL_CIPHER_find(sk,c);
 680         if (i < 0)
 681                 {
 682                 /* we did not say we would use this cipher */
 683                 al=SSL_AD_ILLEGAL_PARAMETER;
 684                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 685                 goto f_err;
 686                 }
 687
 688         if (s->hit && (s->session->cipher != c))
 689                 {
 690                 if (!(s->options &
 691                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 692                         {
 693                         al=SSL_AD_ILLEGAL_PARAMETER;
 694                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 695                         goto f_err;
 696                         }
 697                 }
 698         s->s3->tmp.new_cipher=c;
 699
 700         /* lets get the compression algorithm */
 701         /* COMPRESSION */
 702         j= *(p++);
 703         if (j == 0)
 704                 comp=NULL;
 705         else
 706                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
 707
 708         if ((j != 0) && (comp == NULL))
 709                 {
 710                 al=SSL_AD_ILLEGAL_PARAMETER;
 711                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 712                 goto f_err;
 713                 }
 714         else
 715                 {
 716                 s->s3->tmp.new_compression=comp;
 717                 }
 718
 719         if (p != (d+n))
 720                 {
 721                 /* wrong packet length */
 722                 al=SSL_AD_DECODE_ERROR;
 723                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
 724                 goto err;
 725                 }
 726
 727         return(1);
 728 f_err:
 729         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 730 err:
 731         return(-1);
 732         }
 733
 734 static int ssl3_get_server_certificate(SSL *s)
 735         {
 736         int al,i,ok,ret= -1;
 737         unsigned long n,nc,llen,l;
 738         X509 *x=NULL;
 739         unsigned char *p,*d,*q;
 740         STACK_OF(X509) *sk=NULL;
 741         SESS_CERT *sc;
 742         EVP_PKEY *pkey=NULL;
 743
 744         n=ssl3_get_message(s,
 745                 SSL3_ST_CR_CERT_A,
 746                 SSL3_ST_CR_CERT_B,
 747                 -1,
 748 #if defined(MSDOS) && !defined(WIN32)
 749                 1024*30, /* 30k max cert list :-) */
 750 #else
 751                 1024*100, /* 100k max cert list :-) */
 752 #endif
 753                 &ok);
 754
 755         if (!ok) return((int)n);
 756
 757         if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
 758                 {
 759                 s->s3->tmp.reuse_message=1;
 760                 return(1);
 761                 }
 762
 763         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
 764                 {
 765                 al=SSL_AD_UNEXPECTED_MESSAGE;
 766                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
 767                 goto f_err;
 768                 }
 769         d=p=(unsigned char *)s->init_buf->data;
 770
 771         if ((sk=sk_X509_new_null()) == NULL)
 772                 {
 773                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 774                 goto err;
 775                 }
 776
 777         n2l3(p,llen);
 778         if (llen+3 != n)
 779                 {
 780                 al=SSL_AD_DECODE_ERROR;
 781                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
 782                 goto f_err;
 783                 }
 784         for (nc=0; nc<llen; )
 785                 {
 786                 n2l3(p,l);
 787                 if ((l+nc+3) > llen)
 788                         {
 789                         al=SSL_AD_DECODE_ERROR;
 790                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 791                         goto f_err;
 792                         }
 793
 794                 q=p;
 795                 x=d2i_X509(NULL,&q,l);
 796                 if (x == NULL)
 797                         {
 798                         al=SSL_AD_BAD_CERTIFICATE;
 799                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
 800                         goto f_err;
 801                         }
 802                 if (q != (p+l))
 803                         {
 804                         al=SSL_AD_DECODE_ERROR;
 805                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 806                         goto f_err;
 807                         }
 808                 if (!sk_X509_push(sk,x))
 809                         {
 810                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 811                         goto err;
 812                         }
 813                 x=NULL;
 814                 nc+=l+3;
 815                 p=q;
 816                 }
 817
 818         i=ssl_verify_cert_chain(s,sk);
 819         if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
 820                 {
 821                 al=ssl_verify_alarm_type(s->verify_result);
 822                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
 823                 goto f_err;
 824                 }
 825         ERR_clear_error(); /* but we keep s->verify_result */
 826
 827         sc=ssl_sess_cert_new();
 828         if (sc == NULL) goto err;
 829
 830         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
 831         s->session->sess_cert=sc;
 832
 833         sc->cert_chain=sk;
 834         /* Inconsistency alert: cert_chain does include the peer's
 835          * certificate, which we don't include in s3_srvr.c */
 836         x=sk_X509_value(sk,0);
 837         sk=NULL;
 838
 839         pkey=X509_get_pubkey(x);
 840
 841         if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
 842                 {
 843                 x=NULL;
 844                 al=SSL3_AL_FATAL;
 845                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
 846                 goto f_err;
 847                 }
 848
 849         i=ssl_cert_type(x,pkey);
 850         if (i < 0)
 851                 {
 852                 x=NULL;
 853                 al=SSL3_AL_FATAL;
 854                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
 855                 goto f_err;
 856                 }
 857
 858         sc->peer_cert_type=i;
 859         CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 860         if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
 861                                                                                  * We just created sc a couple of
 862                                                                                  * lines ago. */
 863                 X509_free(sc->peer_pkeys[i].x509);
 864         sc->peer_pkeys[i].x509=x;
 865         sc->peer_key= &(sc->peer_pkeys[i]);
 866
 867         if (s->session->peer != NULL)
 868                 X509_free(s->session->peer);
 869         CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 870         s->session->peer=x;
 871         s->session->verify_result = s->verify_result;
 872
 873         x=NULL;
 874         ret=1;
 875
 876         if (0)
 877                 {
 878 f_err:
 879                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
 880                 }
 881 err:
 882         EVP_PKEY_free(pkey);
 883         X509_free(x);
 884         sk_X509_pop_free(sk,X509_free);
 885         return(ret);
 886         }
 887
 888 static int ssl3_get_key_exchange(SSL *s)
 889         {
 890 #ifndef NO_RSA
 891         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
 892 #endif
 893         EVP_MD_CTX md_ctx;
 894         unsigned char *param,*p;
 895         int al,i,j,param_len,ok;
 896         long n,alg;
 897         EVP_PKEY *pkey=NULL;
 898 #ifndef NO_RSA
 899         RSA *rsa=NULL;
 900 #endif
 901 #ifndef NO_DH
 902         DH *dh=NULL;
 903 #endif
 904
 905         /* use same message size as in ssl3_get_certificate_request()
 906          * as ServerKeyExchange message may be skipped */
 907         n=ssl3_get_message(s,
 908                 SSL3_ST_CR_KEY_EXCH_A,
 909                 SSL3_ST_CR_KEY_EXCH_B,
 910                 -1,
 911 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
 912                 1024*30,  /* 30k max cert list :-) */
 913 #else
 914                 1024*100, /* 100k max cert list :-) */
 915 #endif
 916                 &ok);
 917
 918         if (!ok) return((int)n);
 919
 920         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
 921                 {
 922                 s->s3->tmp.reuse_message=1;
 923                 return(1);
 924                 }
 925
 926         param=p=(unsigned char *)s->init_buf->data;
 927
 928         if (s->session->sess_cert != NULL)
 929                 {
 930 #ifndef NO_RSA
 931                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
 932                         {
 933                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
 934                         s->session->sess_cert->peer_rsa_tmp=NULL;
 935                         }
 936 #endif
 937 #ifndef NO_DH
 938                 if (s->session->sess_cert->peer_dh_tmp)
 939                         {
 940                         DH_free(s->session->sess_cert->peer_dh_tmp);
 941                         s->session->sess_cert->peer_dh_tmp=NULL;
 942                         }
 943 #endif
 944                 }
 945         else
 946                 {
 947                 s->session->sess_cert=ssl_sess_cert_new();
 948                 }
 949
 950         param_len=0;
 951         alg=s->s3->tmp.new_cipher->algorithms;
 952
 953 #ifndef NO_RSA
 954         if (alg & SSL_kRSA)
 955                 {
 956                 if ((rsa=RSA_new()) == NULL)
 957                         {
 958                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
 959                         goto err;
 960                         }
 961                 n2s(p,i);
 962                 param_len=i+2;
 963                 if (param_len > n)
 964                         {
 965                         al=SSL_AD_DECODE_ERROR;
 966                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
 967                         goto f_err;
 968                         }
 969                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
 970                         {
 971                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
 972                         goto err;
 973                         }
 974                 p+=i;
 975
 976                 n2s(p,i);
 977                 param_len+=i+2;
 978                 if (param_len > n)
 979                         {
 980                         al=SSL_AD_DECODE_ERROR;
 981                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
 982                         goto f_err;
 983                         }
 984                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
 985                         {
 986                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
 987                         goto err;
 988                         }
 989                 p+=i;
 990                 n-=param_len;
 991
 992                 /* this should be because we are using an export cipher */
 993                 if (alg & SSL_aRSA)
 994                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
 995                 else
 996                         {
 997                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
 998                         goto err;
 999                         }
1000                 s->session->sess_cert->peer_rsa_tmp=rsa;
1001                 rsa=NULL;
1002                 }
1003 #else /* NO_RSA */
1004         if (0)
1005                 ;
1006 #endif
1007 #ifndef NO_DH
1008         else if (alg & SSL_kEDH)
1009                 {
1010                 if ((dh=DH_new()) == NULL)
1011                         {
1012                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1013                         goto err;
1014                         }
1015                 n2s(p,i);
1016                 param_len=i+2;
1017                 if (param_len > n)
1018                         {
1019                         al=SSL_AD_DECODE_ERROR;
1020                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1021                         goto f_err;
1022                         }
1023                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1024                         {
1025                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1026                         goto err;
1027                         }
1028                 p+=i;
1029
1030                 n2s(p,i);
1031                 param_len+=i+2;
1032                 if (param_len > n)
1033                         {
1034                         al=SSL_AD_DECODE_ERROR;
1035                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1036                         goto f_err;
1037                         }
1038                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1039                         {
1040                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1041                         goto err;
1042                         }
1043                 p+=i;
1044
1045                 n2s(p,i);
1046                 param_len+=i+2;
1047                 if (param_len > n)
1048                         {
1049                         al=SSL_AD_DECODE_ERROR;
1050                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1051                         goto f_err;
1052                         }
1053                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1054                         {
1055                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1056                         goto err;
1057                         }
1058                 p+=i;
1059                 n-=param_len;
1060
1061 #ifndef NO_RSA
1062                 if (alg & SSL_aRSA)
1063                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1064 #else
1065                 if (0)
1066                         ;
1067 #endif
1068 #ifndef NO_DSA
1069                 else if (alg & SSL_aDSS)
1070                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1071 #endif
1072                 /* else anonymous DH, so no certificate or pkey. */
1073
1074                 s->session->sess_cert->peer_dh_tmp=dh;
1075                 dh=NULL;
1076                 }
1077         else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1078                 {
1079                 al=SSL_AD_ILLEGAL_PARAMETER;
1080                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1081                 goto f_err;
1082                 }
1083 #endif /* !NO_DH */
1084         if (alg & SSL_aFZA)
1085                 {
1086                 al=SSL_AD_HANDSHAKE_FAILURE;
1087                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1088                 goto f_err;
1089                 }
1090
1091
1092         /* p points to the next byte, there are 'n' bytes left */
1093
1094
1095         /* if it was signed, check the signature */
1096         if (pkey != NULL)
1097                 {
1098                 n2s(p,i);
1099                 n-=2;
1100                 j=EVP_PKEY_size(pkey);
1101
1102                 if ((i != n) || (n > j) || (n <= 0))
1103                         {
1104                         /* wrong packet length */
1105                         al=SSL_AD_DECODE_ERROR;
1106                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1107                         goto f_err;
1108                         }
1109
1110 #ifndef NO_RSA
1111                 if (pkey->type == EVP_PKEY_RSA)
1112                         {
1113                         int num;
1114
1115                         j=0;
1116                         q=md_buf;
1117                         for (num=2; num > 0; num--)
1118                                 {
1119                                 EVP_DigestInit(&md_ctx,(num == 2)
1120                                         ?s->ctx->md5:s->ctx->sha1);
1121                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1122                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1123                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1124                                 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1125                                 q+=i;
1126                                 j+=i;
1127                                 }
1128                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1129                                                                 pkey->pkey.rsa);
1130                         if (i < 0)
1131                                 {
1132                                 al=SSL_AD_DECRYPT_ERROR;
1133                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1134                                 goto f_err;
1135                                 }
1136                         if (i == 0)
1137                                 {
1138                                 /* bad signature */
1139                                 al=SSL_AD_DECRYPT_ERROR;
1140                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1141                                 goto f_err;
1142                                 }
1143                         }
1144                 else
1145 #endif
1146 #ifndef NO_DSA
1147                         if (pkey->type == EVP_PKEY_DSA)
1148                         {
1149                         /* lets do DSS */
1150                         EVP_VerifyInit(&md_ctx,EVP_dss1());
1151                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1152                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1153                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1154                         if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1155                                 {
1156                                 /* bad signature */
1157                                 al=SSL_AD_DECRYPT_ERROR;
1158                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1159                                 goto f_err;
1160                                 }
1161                         }
1162                 else
1163 #endif
1164                         {
1165                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1166                         goto err;
1167                         }
1168                 }
1169         else
1170                 {
1171                 /* still data left over */
1172                 if (!(alg & SSL_aNULL))
1173                         {
1174                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1175                         goto err;
1176                         }
1177                 if (n != 0)
1178                         {
1179                         al=SSL_AD_DECODE_ERROR;
1180                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1181                         goto f_err;
1182                         }
1183                 }
1184         EVP_PKEY_free(pkey);
1185         return(1);
1186 f_err:
1187         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1188 err:
1189         EVP_PKEY_free(pkey);
1190 #ifndef NO_RSA
1191         if (rsa != NULL)
1192                 RSA_free(rsa);
1193 #endif
1194 #ifndef NO_DH
1195         if (dh != NULL)
1196                 DH_free(dh);
1197 #endif
1198         return(-1);
1199         }
1200
1201 static int ssl3_get_certificate_request(SSL *s)
1202         {
1203         int ok,ret=0;
1204         unsigned long n,nc,l;
1205         unsigned int llen,ctype_num,i;
1206         X509_NAME *xn=NULL;
1207         unsigned char *p,*d,*q;
1208         STACK_OF(X509_NAME) *ca_sk=NULL;
1209
1210         n=ssl3_get_message(s,
1211                 SSL3_ST_CR_CERT_REQ_A,
1212                 SSL3_ST_CR_CERT_REQ_B,
1213                 -1,
1214 #if defined(MSDOS) && !defined(WIN32)
1215                 1024*30,  /* 30k max cert list :-) */
1216 #else
1217                 1024*100, /* 100k max cert list :-) */
1218 #endif
1219                 &ok);
1220
1221         if (!ok) return((int)n);
1222
1223         s->s3->tmp.cert_req=0;
1224
1225         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1226                 {
1227                 s->s3->tmp.reuse_message=1;
1228                 return(1);
1229                 }
1230
1231         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1232                 {
1233                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1234                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1235                 goto err;
1236                 }
1237
1238         /* TLS does not like anon-DH with client cert */
1239         if (s->version > SSL3_VERSION)
1240                 {
1241                 l=s->s3->tmp.new_cipher->algorithms;
1242                 if (l & SSL_aNULL)
1243                         {
1244                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1245                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1246                         goto err;
1247                         }
1248                 }
1249
1250         d=p=(unsigned char *)s->init_buf->data;
1251
1252         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1253                 {
1254                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1255                 goto err;
1256                 }
1257
1258         /* get the certificate types */
1259         ctype_num= *(p++);
1260         if (ctype_num > SSL3_CT_NUMBER)
1261                 ctype_num=SSL3_CT_NUMBER;
1262         for (i=0; i<ctype_num; i++)
1263                 s->s3->tmp.ctype[i]= p[i];
1264         p+=ctype_num;
1265
1266         /* get the CA RDNs */
1267         n2s(p,llen);
1268 #if 0
1269 {
1270 FILE *out;
1271 out=fopen("/tmp/vsign.der","w");
1272 fwrite(p,1,llen,out);
1273 fclose(out);
1274 }
1275 #endif
1276
1277         if ((llen+ctype_num+2+1) != n)
1278                 {
1279                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1280                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1281                 goto err;
1282                 }
1283
1284         for (nc=0; nc<llen; )
1285                 {
1286                 n2s(p,l);
1287                 if ((l+nc+2) > llen)
1288                         {
1289                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1290                                 goto cont; /* netscape bugs */
1291                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1292                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1293                         goto err;
1294                         }
1295
1296                 q=p;
1297
1298                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1299                         {
1300                         /* If netscape tolerance is on, ignore errors */
1301                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1302                                 goto cont;
1303                         else
1304                                 {
1305                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1306                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1307                                 goto err;
1308                                 }
1309                         }
1310
1311                 if (q != (p+l))
1312                         {
1313                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1314                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1315                         goto err;
1316                         }
1317                 if (!sk_X509_NAME_push(ca_sk,xn))
1318                         {
1319                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1320                         goto err;
1321                         }
1322
1323                 p+=l;
1324                 nc+=l+2;
1325                 }
1326
1327         if (0)
1328                 {
1329 cont:
1330                 ERR_clear_error();
1331                 }
1332
1333         /* we should setup a certificate to return.... */
1334         s->s3->tmp.cert_req=1;
1335         s->s3->tmp.ctype_num=ctype_num;
1336         if (s->s3->tmp.ca_names != NULL)
1337                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1338         s->s3->tmp.ca_names=ca_sk;
1339         ca_sk=NULL;
1340
1341         ret=1;
1342 err:
1343         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1344         return(ret);
1345         }
1346
1347 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1348         {
1349         return(X509_NAME_cmp(*a,*b));
1350         }
1351
1352 static int ssl3_get_server_done(SSL *s)
1353         {
1354         int ok,ret=0;
1355         long n;
1356
1357         n=ssl3_get_message(s,
1358                 SSL3_ST_CR_SRVR_DONE_A,
1359                 SSL3_ST_CR_SRVR_DONE_B,
1360                 SSL3_MT_SERVER_DONE,
1361                 30, /* should be very small, like 0 :-) */
1362                 &ok);
1363
1364         if (!ok) return((int)n);
1365         if (n > 0)
1366                 {
1367                 /* should contain no data */
1368                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1369                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1370                 return -1;
1371                 }
1372         ret=1;
1373         return(ret);
1374         }
1375
1376 static int ssl3_send_client_key_exchange(SSL *s)
1377         {
1378         unsigned char *p,*d;
1379         int n;
1380         unsigned long l;
1381 #ifndef NO_RSA
1382         unsigned char *q;
1383         EVP_PKEY *pkey=NULL;
1384 #endif
1385
1386         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1387                 {
1388                 d=(unsigned char *)s->init_buf->data;
1389                 p= &(d[4]);
1390
1391                 l=s->s3->tmp.new_cipher->algorithms;
1392
1393 #ifndef NO_RSA
1394                 if (l & SSL_kRSA)
1395                         {
1396                         RSA *rsa;
1397                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1398
1399                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
1400                                 rsa=s->session->sess_cert->peer_rsa_tmp;
1401                         else
1402                                 {
1403                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1404                                 if ((pkey == NULL) ||
1405                                         (pkey->type != EVP_PKEY_RSA) ||
1406                                         (pkey->pkey.rsa == NULL))
1407                                         {
1408                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1409                                         goto err;
1410                                         }
1411                                 rsa=pkey->pkey.rsa;
1412                                 EVP_PKEY_free(pkey);
1413                                 }
1414
1415                         tmp_buf[0]=s->client_version>>8;
1416                         tmp_buf[1]=s->client_version&0xff;
1417                         if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1418                                         goto err;
1419
1420                         s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1421
1422                         q=p;
1423                         /* Fix buf for TLS and beyond */
1424                         if (s->version > SSL3_VERSION)
1425                                 p+=2;
1426                         n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1427                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1428 #ifdef PKCS1_CHECK
1429                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1430                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1431 #endif
1432                         if (n <= 0)
1433                                 {
1434                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1435                                 goto err;
1436                                 }
1437
1438                         /* Fix buf for TLS and beyond */
1439                         if (s->version > SSL3_VERSION)
1440                                 {
1441                                 s2n(n,q);
1442                                 n+=2;
1443                                 }
1444
1445                         s->session->master_key_length=
1446                                 s->method->ssl3_enc->generate_master_secret(s,
1447                                         s->session->master_key,
1448                                         tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1449                         memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1450                         }
1451                 else
1452 #endif
1453 #ifndef NO_DH
1454                 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1455                         {
1456                         DH *dh_srvr,*dh_clnt;
1457
1458                         if (s->session->sess_cert->peer_dh_tmp != NULL)
1459                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1460                         else
1461                                 {
1462                                 /* we get them from the cert */
1463                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1464                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1465                                 goto err;
1466                                 }
1467
1468                         /* generate a new random key */
1469                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1470                                 {
1471                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1472                                 goto err;
1473                                 }
1474                         if (!DH_generate_key(dh_clnt))
1475                                 {
1476                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1477                                 goto err;
1478                                 }
1479
1480                         /* use the 'p' output buffer for the DH key, but
1481                          * make sure to clear it out afterwards */
1482
1483                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1484
1485                         if (n <= 0)
1486                                 {
1487                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1488                                 goto err;
1489                                 }
1490
1491                         /* generate master key from the result */
1492                         s->session->master_key_length=
1493                                 s->method->ssl3_enc->generate_master_secret(s,
1494                                         s->session->master_key,p,n);
1495                         /* clean up */
1496                         memset(p,0,n);
1497
1498                         /* send off the data */
1499                         n=BN_num_bytes(dh_clnt->pub_key);
1500                         s2n(n,p);
1501                         BN_bn2bin(dh_clnt->pub_key,p);
1502                         n+=2;
1503
1504                         DH_free(dh_clnt);
1505
1506                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
1507                         }
1508                 else
1509 #endif
1510                         {
1511                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1512                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1513                         goto err;
1514                         }
1515
1516                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1517                 l2n3(n,d);
1518
1519                 s->state=SSL3_ST_CW_KEY_EXCH_B;
1520                 /* number of bytes to write */
1521                 s->init_num=n+4;
1522                 s->init_off=0;
1523                 }
1524
1525         /* SSL3_ST_CW_KEY_EXCH_B */
1526         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1527 err:
1528         return(-1);
1529         }
1530
1531 static int ssl3_send_client_verify(SSL *s)
1532         {
1533         unsigned char *p,*d;
1534         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1535         EVP_PKEY *pkey;
1536 #ifndef NO_RSA
1537         unsigned u=0;
1538 #endif
1539         unsigned long n;
1540 #ifndef NO_DSA
1541         int j;
1542 #endif
1543
1544         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1545                 {
1546                 d=(unsigned char *)s->init_buf->data;
1547                 p= &(d[4]);
1548                 pkey=s->cert->key->privatekey;
1549
1550                 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1551                         &(data[MD5_DIGEST_LENGTH]));
1552
1553 #ifndef NO_RSA
1554                 if (pkey->type == EVP_PKEY_RSA)
1555                         {
1556                         s->method->ssl3_enc->cert_verify_mac(s,
1557                                 &(s->s3->finish_dgst1),&(data[0]));
1558                         if (RSA_sign(NID_md5_sha1, data,
1559                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1560                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1561                                 {
1562                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1563                                 goto err;
1564                                 }
1565                         s2n(u,p);
1566                         n=u+2;
1567                         }
1568                 else
1569 #endif
1570 #ifndef NO_DSA
1571                         if (pkey->type == EVP_PKEY_DSA)
1572                         {
1573                         if (!DSA_sign(pkey->save_type,
1574                                 &(data[MD5_DIGEST_LENGTH]),
1575                                 SHA_DIGEST_LENGTH,&(p[2]),
1576                                 (unsigned int *)&j,pkey->pkey.dsa))
1577                                 {
1578                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1579                                 goto err;
1580                                 }
1581                         s2n(j,p);
1582                         n=j+2;
1583                         }
1584                 else
1585 #endif
1586                         {
1587                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1588                         goto err;
1589                         }
1590                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1591                 l2n3(n,d);
1592
1593                 s->init_num=(int)n+4;
1594                 s->init_off=0;
1595                 }
1596         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1597 err:
1598         return(-1);
1599         }
1600
1601 static int ssl3_send_client_certificate(SSL *s)
1602         {
1603         X509 *x509=NULL;
1604         EVP_PKEY *pkey=NULL;
1605         int i;
1606         unsigned long l;
1607
1608         if (s->state == SSL3_ST_CW_CERT_A)
1609                 {
1610                 if ((s->cert == NULL) ||
1611                         (s->cert->key->x509 == NULL) ||
1612                         (s->cert->key->privatekey == NULL))
1613                         s->state=SSL3_ST_CW_CERT_B;
1614                 else
1615                         s->state=SSL3_ST_CW_CERT_C;
1616                 }
1617
1618         /* We need to get a client cert */
1619         if (s->state == SSL3_ST_CW_CERT_B)
1620                 {
1621                 /* If we get an error, we need to
1622                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1623                  * We then get retied later */
1624                 i=0;
1625                 if (s->ctx->client_cert_cb != NULL)
1626                         i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1627                 if (i < 0)
1628                         {
1629                         s->rwstate=SSL_X509_LOOKUP;
1630                         return(-1);
1631                         }
1632                 s->rwstate=SSL_NOTHING;
1633                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1634                         {
1635                         s->state=SSL3_ST_CW_CERT_B;
1636                         if (    !SSL_use_certificate(s,x509) ||
1637                                 !SSL_use_PrivateKey(s,pkey))
1638                                 i=0;
1639                         }
1640                 else if (i == 1)
1641                         {
1642                         i=0;
1643                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1644                         }
1645
1646                 if (x509 != NULL) X509_free(x509);
1647                 if (pkey != NULL) EVP_PKEY_free(pkey);
1648                 if (i == 0)
1649                         {
1650                         if (s->version == SSL3_VERSION)
1651                                 {
1652                                 s->s3->tmp.cert_req=0;
1653                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1654                                 return(1);
1655                                 }
1656                         else
1657                                 {
1658                                 s->s3->tmp.cert_req=2;
1659                                 }
1660                         }
1661
1662                 /* Ok, we have a cert */
1663                 s->state=SSL3_ST_CW_CERT_C;
1664                 }
1665
1666         if (s->state == SSL3_ST_CW_CERT_C)
1667                 {
1668                 s->state=SSL3_ST_CW_CERT_D;
1669                 l=ssl3_output_cert_chain(s,
1670                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1671                 s->init_num=(int)l;
1672                 s->init_off=0;
1673                 }
1674         /* SSL3_ST_CW_CERT_D */
1675         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1676         }
1677
1678 #define has_bits(i,m)   (((i)&(m)) == (m))
1679
1680 static int ssl3_check_cert_and_algorithm(SSL *s)
1681         {
1682         int i,idx;
1683         long algs;
1684         EVP_PKEY *pkey=NULL;
1685         SESS_CERT *sc;
1686 #ifndef NO_RSA
1687         RSA *rsa;
1688 #endif
1689 #ifndef NO_DH
1690         DH *dh;
1691 #endif
1692
1693         sc=s->session->sess_cert;
1694
1695         if (sc == NULL)
1696                 {
1697                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1698                 goto err;
1699                 }
1700
1701         algs=s->s3->tmp.new_cipher->algorithms;
1702
1703         /* we don't have a certificate */
1704         if (algs & (SSL_aDH|SSL_aNULL))
1705                 return(1);
1706
1707 #ifndef NO_RSA
1708         rsa=s->session->sess_cert->peer_rsa_tmp;
1709 #endif
1710 #ifndef NO_DH
1711         dh=s->session->sess_cert->peer_dh_tmp;
1712 #endif
1713
1714         /* This is the passed certificate */
1715
1716         idx=sc->peer_cert_type;
1717         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1718         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1719         EVP_PKEY_free(pkey);
1720
1721
1722         /* Check that we have a certificate if we require one */
1723         if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1724                 {
1725                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1726                 goto f_err;
1727                 }
1728 #ifndef NO_DSA
1729         else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1730                 {
1731                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1732                 goto f_err;
1733                 }
1734 #endif
1735 #ifndef NO_RSA
1736         if ((algs & SSL_kRSA) &&
1737                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1738                 {
1739                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1740                 goto f_err;
1741                 }
1742 #endif
1743 #ifndef NO_DH
1744         if ((algs & SSL_kEDH) &&
1745                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1746                 {
1747                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1748                 goto f_err;
1749                 }
1750         else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1751                 {
1752                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1753                 goto f_err;
1754                 }
1755 #ifndef NO_DSA
1756         else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1757                 {
1758                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1759                 goto f_err;
1760                 }
1761 #endif
1762 #endif
1763
1764         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1765                 {
1766 #ifndef NO_RSA
1767                 if (algs & SSL_kRSA)
1768                         {
1769                         if (rsa == NULL
1770                             || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1771                                 {
1772                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1773                                 goto f_err;
1774                                 }
1775                         }
1776                 else
1777 #endif
1778 #ifndef NO_DH
1779                         if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1780                             {
1781                             if (dh == NULL
1782                                 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1783                                 {
1784                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1785                                 goto f_err;
1786                                 }
1787                         }
1788                 else
1789 #endif
1790                         {
1791                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1792                         goto f_err;
1793                         }
1794                 }
1795         return(1);
1796 f_err:
1797         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1798 err:
1799         return(0);
1800         }
1801