crypto/openssl-0.9.7d/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 "ssl_locl.h"
 114 #include "kssl_lcl.h"
 115 #include <openssl/buffer.h>
 116 #include <openssl/rand.h>
 117 #include <openssl/objects.h>
 118 #include <openssl/evp.h>
 119 #include <openssl/md5.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                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
 149
 150                 if (init)
 151                         {
 152                         memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
 153                                 sizeof(SSL_METHOD));
 154                         SSLv3_client_data.ssl_connect=ssl3_connect;
 155                         SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
 156                         init=0;
 157                         }
 158
 159                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
 160                 }
 161         return(&SSLv3_client_data);
 162         }
 163
 164 int ssl3_connect(SSL *s)
 165         {
 166         BUF_MEM *buf=NULL;
 167         unsigned long Time=time(NULL),l;
 168         long num1;
 169         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 170         int ret= -1;
 171         int new_state,state,skip=0;;
 172
 173         RAND_add(&Time,sizeof(Time),0);
 174         ERR_clear_error();
 175         clear_sys_error();
 176
 177         if (s->info_callback != NULL)
 178                 cb=s->info_callback;
 179         else if (s->ctx->info_callback != NULL)
 180                 cb=s->ctx->info_callback;
 181
 182         s->in_handshake++;
 183         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 184
 185         for (;;)
 186                 {
 187                 state=s->state;
 188
 189                 switch(s->state)
 190                         {
 191                 case SSL_ST_RENEGOTIATE:
 192                         s->new_session=1;
 193                         s->state=SSL_ST_CONNECT;
 194                         s->ctx->stats.sess_connect_renegotiate++;
 195                         /* break */
 196                 case SSL_ST_BEFORE:
 197                 case SSL_ST_CONNECT:
 198                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 199                 case SSL_ST_OK|SSL_ST_CONNECT:
 200
 201                         s->server=0;
 202                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 203
 204                         if ((s->version & 0xff00 ) != 0x0300)
 205                                 {
 206                                 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
 207                                 ret = -1;
 208                                 goto end;
 209                                 }
 210
 211                         /* s->version=SSL3_VERSION; */
 212                         s->type=SSL_ST_CONNECT;
 213
 214                         if (s->init_buf == NULL)
 215                                 {
 216                                 if ((buf=BUF_MEM_new()) == NULL)
 217                                         {
 218                                         ret= -1;
 219                                         goto end;
 220                                         }
 221                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 222                                         {
 223                                         ret= -1;
 224                                         goto end;
 225                                         }
 226                                 s->init_buf=buf;
 227                                 buf=NULL;
 228                                 }
 229
 230                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 231
 232                         /* setup buffing BIO */
 233                         if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
 234
 235                         /* don't push the buffering BIO quite yet */
 236
 237                         ssl3_init_finished_mac(s);
 238
 239                         s->state=SSL3_ST_CW_CLNT_HELLO_A;
 240                         s->ctx->stats.sess_connect++;
 241                         s->init_num=0;
 242                         break;
 243
 244                 case SSL3_ST_CW_CLNT_HELLO_A:
 245                 case SSL3_ST_CW_CLNT_HELLO_B:
 246
 247                         s->shutdown=0;
 248                         ret=ssl3_client_hello(s);
 249                         if (ret <= 0) goto end;
 250                         s->state=SSL3_ST_CR_SRVR_HELLO_A;
 251                         s->init_num=0;
 252
 253                         /* turn on buffering for the next lot of output */
 254                         if (s->bbio != s->wbio)
 255                                 s->wbio=BIO_push(s->bbio,s->wbio);
 256
 257                         break;
 258
 259                 case SSL3_ST_CR_SRVR_HELLO_A:
 260                 case SSL3_ST_CR_SRVR_HELLO_B:
 261                         ret=ssl3_get_server_hello(s);
 262                         if (ret <= 0) goto end;
 263                         if (s->hit)
 264                                 s->state=SSL3_ST_CR_FINISHED_A;
 265                         else
 266                                 s->state=SSL3_ST_CR_CERT_A;
 267                         s->init_num=0;
 268                         break;
 269
 270                 case SSL3_ST_CR_CERT_A:
 271                 case SSL3_ST_CR_CERT_B:
 272                         /* Check if it is anon DH */
 273                         if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
 274                                 {
 275                                 ret=ssl3_get_server_certificate(s);
 276                                 if (ret <= 0) goto end;
 277                                 }
 278                         else
 279                                 skip=1;
 280                         s->state=SSL3_ST_CR_KEY_EXCH_A;
 281                         s->init_num=0;
 282                         break;
 283
 284                 case SSL3_ST_CR_KEY_EXCH_A:
 285                 case SSL3_ST_CR_KEY_EXCH_B:
 286                         ret=ssl3_get_key_exchange(s);
 287                         if (ret <= 0) goto end;
 288                         s->state=SSL3_ST_CR_CERT_REQ_A;
 289                         s->init_num=0;
 290
 291                         /* at this point we check that we have the
 292                          * required stuff from the server */
 293                         if (!ssl3_check_cert_and_algorithm(s))
 294                                 {
 295                                 ret= -1;
 296                                 goto end;
 297                                 }
 298                         break;
 299
 300                 case SSL3_ST_CR_CERT_REQ_A:
 301                 case SSL3_ST_CR_CERT_REQ_B:
 302                         ret=ssl3_get_certificate_request(s);
 303                         if (ret <= 0) goto end;
 304                         s->state=SSL3_ST_CR_SRVR_DONE_A;
 305                         s->init_num=0;
 306                         break;
 307
 308                 case SSL3_ST_CR_SRVR_DONE_A:
 309                 case SSL3_ST_CR_SRVR_DONE_B:
 310                         ret=ssl3_get_server_done(s);
 311                         if (ret <= 0) goto end;
 312                         if (s->s3->tmp.cert_req)
 313                                 s->state=SSL3_ST_CW_CERT_A;
 314                         else
 315                                 s->state=SSL3_ST_CW_KEY_EXCH_A;
 316                         s->init_num=0;
 317
 318                         break;
 319
 320                 case SSL3_ST_CW_CERT_A:
 321                 case SSL3_ST_CW_CERT_B:
 322                 case SSL3_ST_CW_CERT_C:
 323                 case SSL3_ST_CW_CERT_D:
 324                         ret=ssl3_send_client_certificate(s);
 325                         if (ret <= 0) goto end;
 326                         s->state=SSL3_ST_CW_KEY_EXCH_A;
 327                         s->init_num=0;
 328                         break;
 329
 330                 case SSL3_ST_CW_KEY_EXCH_A:
 331                 case SSL3_ST_CW_KEY_EXCH_B:
 332                         ret=ssl3_send_client_key_exchange(s);
 333                         if (ret <= 0) goto end;
 334                         l=s->s3->tmp.new_cipher->algorithms;
 335                         /* EAY EAY EAY need to check for DH fix cert
 336                          * sent back */
 337                         /* For TLS, cert_req is set to 2, so a cert chain
 338                          * of nothing is sent, but no verify packet is sent */
 339                         if (s->s3->tmp.cert_req == 1)
 340                                 {
 341                                 s->state=SSL3_ST_CW_CERT_VRFY_A;
 342                                 }
 343                         else
 344                                 {
 345                                 s->state=SSL3_ST_CW_CHANGE_A;
 346                                 s->s3->change_cipher_spec=0;
 347                                 }
 348
 349                         s->init_num=0;
 350                         break;
 351
 352                 case SSL3_ST_CW_CERT_VRFY_A:
 353                 case SSL3_ST_CW_CERT_VRFY_B:
 354                         ret=ssl3_send_client_verify(s);
 355                         if (ret <= 0) goto end;
 356                         s->state=SSL3_ST_CW_CHANGE_A;
 357                         s->init_num=0;
 358                         s->s3->change_cipher_spec=0;
 359                         break;
 360
 361                 case SSL3_ST_CW_CHANGE_A:
 362                 case SSL3_ST_CW_CHANGE_B:
 363                         ret=ssl3_send_change_cipher_spec(s,
 364                                 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
 365                         if (ret <= 0) goto end;
 366                         s->state=SSL3_ST_CW_FINISHED_A;
 367                         s->init_num=0;
 368
 369                         s->session->cipher=s->s3->tmp.new_cipher;
 370                         if (s->s3->tmp.new_compression == NULL)
 371                                 s->session->compress_meth=0;
 372                         else
 373                                 s->session->compress_meth=
 374                                         s->s3->tmp.new_compression->id;
 375                         if (!s->method->ssl3_enc->setup_key_block(s))
 376                                 {
 377                                 ret= -1;
 378                                 goto end;
 379                                 }
 380
 381                         if (!s->method->ssl3_enc->change_cipher_state(s,
 382                                 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
 383                                 {
 384                                 ret= -1;
 385                                 goto end;
 386                                 }
 387
 388                         break;
 389
 390                 case SSL3_ST_CW_FINISHED_A:
 391                 case SSL3_ST_CW_FINISHED_B:
 392                         ret=ssl3_send_finished(s,
 393                                 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
 394                                 s->method->ssl3_enc->client_finished_label,
 395                                 s->method->ssl3_enc->client_finished_label_len);
 396                         if (ret <= 0) goto end;
 397                         s->state=SSL3_ST_CW_FLUSH;
 398
 399                         /* clear flags */
 400                         s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
 401                         if (s->hit)
 402                                 {
 403                                 s->s3->tmp.next_state=SSL_ST_OK;
 404                                 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
 405                                         {
 406                                         s->state=SSL_ST_OK;
 407                                         s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
 408                                         s->s3->delay_buf_pop_ret=0;
 409                                         }
 410                                 }
 411                         else
 412                                 {
 413                                 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
 414                                 }
 415                         s->init_num=0;
 416                         break;
 417
 418                 case SSL3_ST_CR_FINISHED_A:
 419                 case SSL3_ST_CR_FINISHED_B:
 420
 421                         ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
 422                                 SSL3_ST_CR_FINISHED_B);
 423                         if (ret <= 0) goto end;
 424
 425                         if (s->hit)
 426                                 s->state=SSL3_ST_CW_CHANGE_A;
 427                         else
 428                                 s->state=SSL_ST_OK;
 429                         s->init_num=0;
 430                         break;
 431
 432                 case SSL3_ST_CW_FLUSH:
 433                         /* number of bytes to be flushed */
 434                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
 435                         if (num1 > 0)
 436                                 {
 437                                 s->rwstate=SSL_WRITING;
 438                                 num1=BIO_flush(s->wbio);
 439                                 if (num1 <= 0) { ret= -1; goto end; }
 440                                 s->rwstate=SSL_NOTHING;
 441                                 }
 442
 443                         s->state=s->s3->tmp.next_state;
 444                         break;
 445
 446                 case SSL_ST_OK:
 447                         /* clean a few things up */
 448                         ssl3_cleanup_key_block(s);
 449
 450                         if (s->init_buf != NULL)
 451                                 {
 452                                 BUF_MEM_free(s->init_buf);
 453                                 s->init_buf=NULL;
 454                                 }
 455
 456                         /* If we are not 'joining' the last two packets,
 457                          * remove the buffering now */
 458                         if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
 459                                 ssl_free_wbio_buffer(s);
 460                         /* else do it later in ssl3_write */
 461
 462                         s->init_num=0;
 463                         s->new_session=0;
 464
 465                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 466                         if (s->hit) s->ctx->stats.sess_hit++;
 467
 468                         ret=1;
 469                         /* s->server=0; */
 470                         s->handshake_func=ssl3_connect;
 471                         s->ctx->stats.sess_connect_good++;
 472
 473                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 474
 475                         goto end;
 476                         /* break; */
 477
 478                 default:
 479                         SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
 480                         ret= -1;
 481                         goto end;
 482                         /* break; */
 483                         }
 484
 485                 /* did we do anything */
 486                 if (!s->s3->tmp.reuse_message && !skip)
 487                         {
 488                         if (s->debug)
 489                                 {
 490                                 if ((ret=BIO_flush(s->wbio)) <= 0)
 491                                         goto end;
 492                                 }
 493
 494                         if ((cb != NULL) && (s->state != state))
 495                                 {
 496                                 new_state=s->state;
 497                                 s->state=state;
 498                                 cb(s,SSL_CB_CONNECT_LOOP,1);
 499                                 s->state=new_state;
 500                                 }
 501                         }
 502                 skip=0;
 503                 }
 504 end:
 505         s->in_handshake--;
 506         if (buf != NULL)
 507                 BUF_MEM_free(buf);
 508         if (cb != NULL)
 509                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 510         return(ret);
 511         }
 512
 513
 514 static int ssl3_client_hello(SSL *s)
 515         {
 516         unsigned char *buf;
 517         unsigned char *p,*d;
 518         int i,j;
 519         unsigned long Time,l;
 520         SSL_COMP *comp;
 521
 522         buf=(unsigned char *)s->init_buf->data;
 523         if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
 524                 {
 525                 if ((s->session == NULL) ||
 526                         (s->session->ssl_version != s->version) ||
 527                         (s->session->not_resumable))
 528                         {
 529                         if (!ssl_get_new_session(s,0))
 530                                 goto err;
 531                         }
 532                 /* else use the pre-loaded session */
 533
 534                 p=s->s3->client_random;
 535                 Time=time(NULL);                        /* Time */
 536                 l2n(Time,p);
 537                 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
 538
 539                 /* Do the message type and length last */
 540                 d=p= &(buf[4]);
 541
 542                 *(p++)=s->version>>8;
 543                 *(p++)=s->version&0xff;
 544                 s->client_version=s->version;
 545
 546                 /* Random stuff */
 547                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 548                 p+=SSL3_RANDOM_SIZE;
 549
 550                 /* Session ID */
 551                 if (s->new_session)
 552                         i=0;
 553                 else
 554                         i=s->session->session_id_length;
 555                 *(p++)=i;
 556                 if (i != 0)
 557                         {
 558                         if (i > sizeof s->session->session_id)
 559                                 {
 560                                 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
 561                                 goto err;
 562                                 }
 563                         memcpy(p,s->session->session_id,i);
 564                         p+=i;
 565                         }
 566
 567                 /* Ciphers supported */
 568                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
 569                 if (i == 0)
 570                         {
 571                         SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 572                         goto err;
 573                         }
 574                 s2n(i,p);
 575                 p+=i;
 576
 577                 /* COMPRESSION */
 578                 if (s->ctx->comp_methods == NULL)
 579                         j=0;
 580                 else
 581                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 582                 *(p++)=1+j;
 583                 for (i=0; i<j; i++)
 584                         {
 585                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 586                         *(p++)=comp->id;
 587                         }
 588                 *(p++)=0; /* Add the NULL method */
 589
 590                 l=(p-d);
 591                 d=buf;
 592                 *(d++)=SSL3_MT_CLIENT_HELLO;
 593                 l2n3(l,d);
 594
 595                 s->state=SSL3_ST_CW_CLNT_HELLO_B;
 596                 /* number of bytes to write */
 597                 s->init_num=p-buf;
 598                 s->init_off=0;
 599                 }
 600
 601         /* SSL3_ST_CW_CLNT_HELLO_B */
 602         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 603 err:
 604         return(-1);
 605         }
 606
 607 static int ssl3_get_server_hello(SSL *s)
 608         {
 609         STACK_OF(SSL_CIPHER) *sk;
 610         SSL_CIPHER *c;
 611         unsigned char *p,*d;
 612         int i,al,ok;
 613         unsigned int j;
 614         long n;
 615         SSL_COMP *comp;
 616
 617         n=ssl3_get_message(s,
 618                 SSL3_ST_CR_SRVR_HELLO_A,
 619                 SSL3_ST_CR_SRVR_HELLO_B,
 620                 SSL3_MT_SERVER_HELLO,
 621                 300, /* ?? */
 622                 &ok);
 623
 624         if (!ok) return((int)n);
 625         d=p=(unsigned char *)s->init_msg;
 626
 627         if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
 628                 {
 629                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
 630                 s->version=(s->version&0xff00)|p[1];
 631                 al=SSL_AD_PROTOCOL_VERSION;
 632                 goto f_err;
 633                 }
 634         p+=2;
 635
 636         /* load the server hello data */
 637         /* load the server random */
 638         memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
 639         p+=SSL3_RANDOM_SIZE;
 640
 641         /* get the session-id */
 642         j= *(p++);
 643
 644         if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
 645                 {
 646                 al=SSL_AD_ILLEGAL_PARAMETER;
 647                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
 648                 goto f_err;
 649                 }
 650
 651         if (j != 0 && j == s->session->session_id_length
 652             && memcmp(p,s->session->session_id,j) == 0)
 653             {
 654             if(s->sid_ctx_length != s->session->sid_ctx_length
 655                || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
 656                 {
 657                 /* actually a client application bug */
 658                 al=SSL_AD_ILLEGAL_PARAMETER;
 659                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
 660                 goto f_err;
 661                 }
 662             s->hit=1;
 663             }
 664         else    /* a miss or crap from the other end */
 665                 {
 666                 /* If we were trying for session-id reuse, make a new
 667                  * SSL_SESSION so we don't stuff up other people */
 668                 s->hit=0;
 669                 if (s->session->session_id_length > 0)
 670                         {
 671                         if (!ssl_get_new_session(s,0))
 672                                 {
 673                                 al=SSL_AD_INTERNAL_ERROR;
 674                                 goto f_err;
 675                                 }
 676                         }
 677                 s->session->session_id_length=j;
 678                 memcpy(s->session->session_id,p,j); /* j could be 0 */
 679                 }
 680         p+=j;
 681         c=ssl_get_cipher_by_char(s,p);
 682         if (c == NULL)
 683                 {
 684                 /* unknown cipher */
 685                 al=SSL_AD_ILLEGAL_PARAMETER;
 686                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
 687                 goto f_err;
 688                 }
 689         p+=ssl_put_cipher_by_char(s,NULL,NULL);
 690
 691         sk=ssl_get_ciphers_by_id(s);
 692         i=sk_SSL_CIPHER_find(sk,c);
 693         if (i < 0)
 694                 {
 695                 /* we did not say we would use this cipher */
 696                 al=SSL_AD_ILLEGAL_PARAMETER;
 697                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
 698                 goto f_err;
 699                 }
 700
 701         /* Depending on the session caching (internal/external), the cipher
 702            and/or cipher_id values may not be set. Make sure that
 703            cipher_id is set and use it for comparison. */
 704         if (s->session->cipher)
 705                 s->session->cipher_id = s->session->cipher->id;
 706         if (s->hit && (s->session->cipher_id != c->id))
 707                 {
 708                 if (!(s->options &
 709                         SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
 710                         {
 711                         al=SSL_AD_ILLEGAL_PARAMETER;
 712                         SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
 713                         goto f_err;
 714                         }
 715                 }
 716         s->s3->tmp.new_cipher=c;
 717
 718         /* lets get the compression algorithm */
 719         /* COMPRESSION */
 720         j= *(p++);
 721         if (j == 0)
 722                 comp=NULL;
 723         else
 724                 comp=ssl3_comp_find(s->ctx->comp_methods,j);
 725
 726         if ((j != 0) && (comp == NULL))
 727                 {
 728                 al=SSL_AD_ILLEGAL_PARAMETER;
 729                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
 730                 goto f_err;
 731                 }
 732         else
 733                 {
 734                 s->s3->tmp.new_compression=comp;
 735                 }
 736
 737         if (p != (d+n))
 738                 {
 739                 /* wrong packet length */
 740                 al=SSL_AD_DECODE_ERROR;
 741                 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
 742                 goto err;
 743                 }
 744
 745         return(1);
 746 f_err:
 747         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 748 err:
 749         return(-1);
 750         }
 751
 752 static int ssl3_get_server_certificate(SSL *s)
 753         {
 754         int al,i,ok,ret= -1;
 755         unsigned long n,nc,llen,l;
 756         X509 *x=NULL;
 757         unsigned char *p,*d,*q;
 758         STACK_OF(X509) *sk=NULL;
 759         SESS_CERT *sc;
 760         EVP_PKEY *pkey=NULL;
 761         int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
 762
 763         n=ssl3_get_message(s,
 764                 SSL3_ST_CR_CERT_A,
 765                 SSL3_ST_CR_CERT_B,
 766                 -1,
 767                 s->max_cert_list,
 768                 &ok);
 769
 770         if (!ok) return((int)n);
 771
 772         if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
 773                 {
 774                 s->s3->tmp.reuse_message=1;
 775                 return(1);
 776                 }
 777
 778         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
 779                 {
 780                 al=SSL_AD_UNEXPECTED_MESSAGE;
 781                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
 782                 goto f_err;
 783                 }
 784         d=p=(unsigned char *)s->init_msg;
 785
 786         if ((sk=sk_X509_new_null()) == NULL)
 787                 {
 788                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 789                 goto err;
 790                 }
 791
 792         n2l3(p,llen);
 793         if (llen+3 != n)
 794                 {
 795                 al=SSL_AD_DECODE_ERROR;
 796                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
 797                 goto f_err;
 798                 }
 799         for (nc=0; nc<llen; )
 800                 {
 801                 n2l3(p,l);
 802                 if ((l+nc+3) > llen)
 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
 809                 q=p;
 810                 x=d2i_X509(NULL,&q,l);
 811                 if (x == NULL)
 812                         {
 813                         al=SSL_AD_BAD_CERTIFICATE;
 814                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
 815                         goto f_err;
 816                         }
 817                 if (q != (p+l))
 818                         {
 819                         al=SSL_AD_DECODE_ERROR;
 820                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
 821                         goto f_err;
 822                         }
 823                 if (!sk_X509_push(sk,x))
 824                         {
 825                         SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 826                         goto err;
 827                         }
 828                 x=NULL;
 829                 nc+=l+3;
 830                 p=q;
 831                 }
 832
 833         i=ssl_verify_cert_chain(s,sk);
 834         if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
 835 #ifndef OPENSSL_NO_KRB5
 836                 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
 837                 != (SSL_aKRB5|SSL_kKRB5)
 838 #endif /* OPENSSL_NO_KRB5 */
 839                 )
 840                 {
 841                 al=ssl_verify_alarm_type(s->verify_result);
 842                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
 843                 goto f_err;
 844                 }
 845         ERR_clear_error(); /* but we keep s->verify_result */
 846
 847         sc=ssl_sess_cert_new();
 848         if (sc == NULL) goto err;
 849
 850         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
 851         s->session->sess_cert=sc;
 852
 853         sc->cert_chain=sk;
 854         /* Inconsistency alert: cert_chain does include the peer's
 855          * certificate, which we don't include in s3_srvr.c */
 856         x=sk_X509_value(sk,0);
 857         sk=NULL;
 858         /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
 859
 860         pkey=X509_get_pubkey(x);
 861
 862         /* VRS: allow null cert if auth == KRB5 */
 863         need_cert =     ((s->s3->tmp.new_cipher->algorithms
 864                         & (SSL_MKEY_MASK|SSL_AUTH_MASK))
 865                         == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
 866
 867 #ifdef KSSL_DEBUG
 868         printf("pkey,x = %p, %p\n", pkey,x);
 869         printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
 870         printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
 871                 s->s3->tmp.new_cipher->algorithms, need_cert);
 872 #endif    /* KSSL_DEBUG */
 873
 874         if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
 875                 {
 876                 x=NULL;
 877                 al=SSL3_AL_FATAL;
 878                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
 879                         SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
 880                 goto f_err;
 881                 }
 882
 883         i=ssl_cert_type(x,pkey);
 884         if (need_cert && i < 0)
 885                 {
 886                 x=NULL;
 887                 al=SSL3_AL_FATAL;
 888                 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
 889                         SSL_R_UNKNOWN_CERTIFICATE_TYPE);
 890                 goto f_err;
 891                 }
 892
 893         if (need_cert)
 894                 {
 895                 sc->peer_cert_type=i;
 896                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 897                 /* Why would the following ever happen?
 898                  * We just created sc a couple of lines ago. */
 899                 if (sc->peer_pkeys[i].x509 != NULL)
 900                         X509_free(sc->peer_pkeys[i].x509);
 901                 sc->peer_pkeys[i].x509=x;
 902                 sc->peer_key= &(sc->peer_pkeys[i]);
 903
 904                 if (s->session->peer != NULL)
 905                         X509_free(s->session->peer);
 906                 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 907                 s->session->peer=x;
 908                 }
 909         else
 910                 {
 911                 sc->peer_cert_type=i;
 912                 sc->peer_key= NULL;
 913
 914                 if (s->session->peer != NULL)
 915                         X509_free(s->session->peer);
 916                 s->session->peer=NULL;
 917                 }
 918         s->session->verify_result = s->verify_result;
 919
 920         x=NULL;
 921         ret=1;
 922
 923         if (0)
 924                 {
 925 f_err:
 926                 ssl3_send_alert(s,SSL3_AL_FATAL,al);
 927                 }
 928 err:
 929         EVP_PKEY_free(pkey);
 930         X509_free(x);
 931         sk_X509_pop_free(sk,X509_free);
 932         return(ret);
 933         }
 934
 935 static int ssl3_get_key_exchange(SSL *s)
 936         {
 937 #ifndef OPENSSL_NO_RSA
 938         unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
 939 #endif
 940         EVP_MD_CTX md_ctx;
 941         unsigned char *param,*p;
 942         int al,i,j,param_len,ok;
 943         long n,alg;
 944         EVP_PKEY *pkey=NULL;
 945 #ifndef OPENSSL_NO_RSA
 946         RSA *rsa=NULL;
 947 #endif
 948 #ifndef OPENSSL_NO_DH
 949         DH *dh=NULL;
 950 #endif
 951
 952         /* use same message size as in ssl3_get_certificate_request()
 953          * as ServerKeyExchange message may be skipped */
 954         n=ssl3_get_message(s,
 955                 SSL3_ST_CR_KEY_EXCH_A,
 956                 SSL3_ST_CR_KEY_EXCH_B,
 957                 -1,
 958                 s->max_cert_list,
 959                 &ok);
 960
 961         if (!ok) return((int)n);
 962
 963         if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
 964                 {
 965                 s->s3->tmp.reuse_message=1;
 966                 return(1);
 967                 }
 968
 969         param=p=(unsigned char *)s->init_msg;
 970
 971         if (s->session->sess_cert != NULL)
 972                 {
 973 #ifndef OPENSSL_NO_RSA
 974                 if (s->session->sess_cert->peer_rsa_tmp != NULL)
 975                         {
 976                         RSA_free(s->session->sess_cert->peer_rsa_tmp);
 977                         s->session->sess_cert->peer_rsa_tmp=NULL;
 978                         }
 979 #endif
 980 #ifndef OPENSSL_NO_DH
 981                 if (s->session->sess_cert->peer_dh_tmp)
 982                         {
 983                         DH_free(s->session->sess_cert->peer_dh_tmp);
 984                         s->session->sess_cert->peer_dh_tmp=NULL;
 985                         }
 986 #endif
 987                 }
 988         else
 989                 {
 990                 s->session->sess_cert=ssl_sess_cert_new();
 991                 }
 992
 993         param_len=0;
 994         alg=s->s3->tmp.new_cipher->algorithms;
 995         EVP_MD_CTX_init(&md_ctx);
 996
 997 #ifndef OPENSSL_NO_RSA
 998         if (alg & SSL_kRSA)
 999                 {
1000                 if ((rsa=RSA_new()) == NULL)
1001                         {
1002                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1003                         goto err;
1004                         }
1005                 n2s(p,i);
1006                 param_len=i+2;
1007                 if (param_len > n)
1008                         {
1009                         al=SSL_AD_DECODE_ERROR;
1010                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1011                         goto f_err;
1012                         }
1013                 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1014                         {
1015                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1016                         goto err;
1017                         }
1018                 p+=i;
1019
1020                 n2s(p,i);
1021                 param_len+=i+2;
1022                 if (param_len > n)
1023                         {
1024                         al=SSL_AD_DECODE_ERROR;
1025                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1026                         goto f_err;
1027                         }
1028                 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1029                         {
1030                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1031                         goto err;
1032                         }
1033                 p+=i;
1034                 n-=param_len;
1035
1036                 /* this should be because we are using an export cipher */
1037                 if (alg & SSL_aRSA)
1038                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1039                 else
1040                         {
1041                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1042                         goto err;
1043                         }
1044                 s->session->sess_cert->peer_rsa_tmp=rsa;
1045                 rsa=NULL;
1046                 }
1047 #else /* OPENSSL_NO_RSA */
1048         if (0)
1049                 ;
1050 #endif
1051 #ifndef OPENSSL_NO_DH
1052         else if (alg & SSL_kEDH)
1053                 {
1054                 if ((dh=DH_new()) == NULL)
1055                         {
1056                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1057                         goto err;
1058                         }
1059                 n2s(p,i);
1060                 param_len=i+2;
1061                 if (param_len > n)
1062                         {
1063                         al=SSL_AD_DECODE_ERROR;
1064                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1065                         goto f_err;
1066                         }
1067                 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1068                         {
1069                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1070                         goto err;
1071                         }
1072                 p+=i;
1073
1074                 n2s(p,i);
1075                 param_len+=i+2;
1076                 if (param_len > n)
1077                         {
1078                         al=SSL_AD_DECODE_ERROR;
1079                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1080                         goto f_err;
1081                         }
1082                 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1083                         {
1084                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1085                         goto err;
1086                         }
1087                 p+=i;
1088
1089                 n2s(p,i);
1090                 param_len+=i+2;
1091                 if (param_len > n)
1092                         {
1093                         al=SSL_AD_DECODE_ERROR;
1094                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1095                         goto f_err;
1096                         }
1097                 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1098                         {
1099                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1100                         goto err;
1101                         }
1102                 p+=i;
1103                 n-=param_len;
1104
1105 #ifndef OPENSSL_NO_RSA
1106                 if (alg & SSL_aRSA)
1107                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1108 #else
1109                 if (0)
1110                         ;
1111 #endif
1112 #ifndef OPENSSL_NO_DSA
1113                 else if (alg & SSL_aDSS)
1114                         pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1115 #endif
1116                 /* else anonymous DH, so no certificate or pkey. */
1117
1118                 s->session->sess_cert->peer_dh_tmp=dh;
1119                 dh=NULL;
1120                 }
1121         else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1122                 {
1123                 al=SSL_AD_ILLEGAL_PARAMETER;
1124                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1125                 goto f_err;
1126                 }
1127 #endif /* !OPENSSL_NO_DH */
1128         if (alg & SSL_aFZA)
1129                 {
1130                 al=SSL_AD_HANDSHAKE_FAILURE;
1131                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1132                 goto f_err;
1133                 }
1134
1135
1136         /* p points to the next byte, there are 'n' bytes left */
1137
1138
1139         /* if it was signed, check the signature */
1140         if (pkey != NULL)
1141                 {
1142                 n2s(p,i);
1143                 n-=2;
1144                 j=EVP_PKEY_size(pkey);
1145
1146                 if ((i != n) || (n > j) || (n <= 0))
1147                         {
1148                         /* wrong packet length */
1149                         al=SSL_AD_DECODE_ERROR;
1150                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1151                         goto f_err;
1152                         }
1153
1154 #ifndef OPENSSL_NO_RSA
1155                 if (pkey->type == EVP_PKEY_RSA)
1156                         {
1157                         int num;
1158
1159                         j=0;
1160                         q=md_buf;
1161                         for (num=2; num > 0; num--)
1162                                 {
1163                                 EVP_DigestInit_ex(&md_ctx,(num == 2)
1164                                         ?s->ctx->md5:s->ctx->sha1, NULL);
1165                                 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1166                                 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1167                                 EVP_DigestUpdate(&md_ctx,param,param_len);
1168                                 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1169                                 q+=i;
1170                                 j+=i;
1171                                 }
1172                         i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1173                                                                 pkey->pkey.rsa);
1174                         if (i < 0)
1175                                 {
1176                                 al=SSL_AD_DECRYPT_ERROR;
1177                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1178                                 goto f_err;
1179                                 }
1180                         if (i == 0)
1181                                 {
1182                                 /* bad signature */
1183                                 al=SSL_AD_DECRYPT_ERROR;
1184                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1185                                 goto f_err;
1186                                 }
1187                         }
1188                 else
1189 #endif
1190 #ifndef OPENSSL_NO_DSA
1191                         if (pkey->type == EVP_PKEY_DSA)
1192                         {
1193                         /* lets do DSS */
1194                         EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1195                         EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1196                         EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1197                         EVP_VerifyUpdate(&md_ctx,param,param_len);
1198                         if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1199                                 {
1200                                 /* bad signature */
1201                                 al=SSL_AD_DECRYPT_ERROR;
1202                                 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1203                                 goto f_err;
1204                                 }
1205                         }
1206                 else
1207 #endif
1208                         {
1209                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1210                         goto err;
1211                         }
1212                 }
1213         else
1214                 {
1215                 /* still data left over */
1216                 if (!(alg & SSL_aNULL))
1217                         {
1218                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1219                         goto err;
1220                         }
1221                 if (n != 0)
1222                         {
1223                         al=SSL_AD_DECODE_ERROR;
1224                         SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1225                         goto f_err;
1226                         }
1227                 }
1228         EVP_PKEY_free(pkey);
1229         EVP_MD_CTX_cleanup(&md_ctx);
1230         return(1);
1231 f_err:
1232         ssl3_send_alert(s,SSL3_AL_FATAL,al);
1233 err:
1234         EVP_PKEY_free(pkey);
1235 #ifndef OPENSSL_NO_RSA
1236         if (rsa != NULL)
1237                 RSA_free(rsa);
1238 #endif
1239 #ifndef OPENSSL_NO_DH
1240         if (dh != NULL)
1241                 DH_free(dh);
1242 #endif
1243         EVP_MD_CTX_cleanup(&md_ctx);
1244         return(-1);
1245         }
1246
1247 static int ssl3_get_certificate_request(SSL *s)
1248         {
1249         int ok,ret=0;
1250         unsigned long n,nc,l;
1251         unsigned int llen,ctype_num,i;
1252         X509_NAME *xn=NULL;
1253         unsigned char *p,*d,*q;
1254         STACK_OF(X509_NAME) *ca_sk=NULL;
1255
1256         n=ssl3_get_message(s,
1257                 SSL3_ST_CR_CERT_REQ_A,
1258                 SSL3_ST_CR_CERT_REQ_B,
1259                 -1,
1260                 s->max_cert_list,
1261                 &ok);
1262
1263         if (!ok) return((int)n);
1264
1265         s->s3->tmp.cert_req=0;
1266
1267         if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1268                 {
1269                 s->s3->tmp.reuse_message=1;
1270                 return(1);
1271                 }
1272
1273         if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1274                 {
1275                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1276                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1277                 goto err;
1278                 }
1279
1280         /* TLS does not like anon-DH with client cert */
1281         if (s->version > SSL3_VERSION)
1282                 {
1283                 l=s->s3->tmp.new_cipher->algorithms;
1284                 if (l & SSL_aNULL)
1285                         {
1286                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1287                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1288                         goto err;
1289                         }
1290                 }
1291
1292         d=p=(unsigned char *)s->init_msg;
1293
1294         if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1295                 {
1296                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1297                 goto err;
1298                 }
1299
1300         /* get the certificate types */
1301         ctype_num= *(p++);
1302         if (ctype_num > SSL3_CT_NUMBER)
1303                 ctype_num=SSL3_CT_NUMBER;
1304         for (i=0; i<ctype_num; i++)
1305                 s->s3->tmp.ctype[i]= p[i];
1306         p+=ctype_num;
1307
1308         /* get the CA RDNs */
1309         n2s(p,llen);
1310 #if 0
1311 {
1312 FILE *out;
1313 out=fopen("/tmp/vsign.der","w");
1314 fwrite(p,1,llen,out);
1315 fclose(out);
1316 }
1317 #endif
1318
1319         if ((llen+ctype_num+2+1) != n)
1320                 {
1321                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1322                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1323                 goto err;
1324                 }
1325
1326         for (nc=0; nc<llen; )
1327                 {
1328                 n2s(p,l);
1329                 if ((l+nc+2) > llen)
1330                         {
1331                         if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1332                                 goto cont; /* netscape bugs */
1333                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1334                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1335                         goto err;
1336                         }
1337
1338                 q=p;
1339
1340                 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1341                         {
1342                         /* If netscape tolerance is on, ignore errors */
1343                         if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1344                                 goto cont;
1345                         else
1346                                 {
1347                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1348                                 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1349                                 goto err;
1350                                 }
1351                         }
1352
1353                 if (q != (p+l))
1354                         {
1355                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1356                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1357                         goto err;
1358                         }
1359                 if (!sk_X509_NAME_push(ca_sk,xn))
1360                         {
1361                         SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1362                         goto err;
1363                         }
1364
1365                 p+=l;
1366                 nc+=l+2;
1367                 }
1368
1369         if (0)
1370                 {
1371 cont:
1372                 ERR_clear_error();
1373                 }
1374
1375         /* we should setup a certificate to return.... */
1376         s->s3->tmp.cert_req=1;
1377         s->s3->tmp.ctype_num=ctype_num;
1378         if (s->s3->tmp.ca_names != NULL)
1379                 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1380         s->s3->tmp.ca_names=ca_sk;
1381         ca_sk=NULL;
1382
1383         ret=1;
1384 err:
1385         if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1386         return(ret);
1387         }
1388
1389 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1390         {
1391         return(X509_NAME_cmp(*a,*b));
1392         }
1393
1394 static int ssl3_get_server_done(SSL *s)
1395         {
1396         int ok,ret=0;
1397         long n;
1398
1399         n=ssl3_get_message(s,
1400                 SSL3_ST_CR_SRVR_DONE_A,
1401                 SSL3_ST_CR_SRVR_DONE_B,
1402                 SSL3_MT_SERVER_DONE,
1403                 30, /* should be very small, like 0 :-) */
1404                 &ok);
1405
1406         if (!ok) return((int)n);
1407         if (n > 0)
1408                 {
1409                 /* should contain no data */
1410                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1411                 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1412                 return -1;
1413                 }
1414         ret=1;
1415         return(ret);
1416         }
1417
1418 static int ssl3_send_client_key_exchange(SSL *s)
1419         {
1420         unsigned char *p,*d;
1421         int n;
1422         unsigned long l;
1423 #ifndef OPENSSL_NO_RSA
1424         unsigned char *q;
1425         EVP_PKEY *pkey=NULL;
1426 #endif
1427 #ifndef OPENSSL_NO_KRB5
1428         KSSL_ERR kssl_err;
1429 #endif /* OPENSSL_NO_KRB5 */
1430
1431         if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1432                 {
1433                 d=(unsigned char *)s->init_buf->data;
1434                 p= &(d[4]);
1435
1436                 l=s->s3->tmp.new_cipher->algorithms;
1437
1438                 /* Fool emacs indentation */
1439                 if (0) {}
1440 #ifndef OPENSSL_NO_RSA
1441                 else if (l & SSL_kRSA)
1442                         {
1443                         RSA *rsa;
1444                         unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1445
1446                         if (s->session->sess_cert->peer_rsa_tmp != NULL)
1447                                 rsa=s->session->sess_cert->peer_rsa_tmp;
1448                         else
1449                                 {
1450                                 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1451                                 if ((pkey == NULL) ||
1452                                         (pkey->type != EVP_PKEY_RSA) ||
1453                                         (pkey->pkey.rsa == NULL))
1454                                         {
1455                                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1456                                         goto err;
1457                                         }
1458                                 rsa=pkey->pkey.rsa;
1459                                 EVP_PKEY_free(pkey);
1460                                 }
1461
1462                         tmp_buf[0]=s->client_version>>8;
1463                         tmp_buf[1]=s->client_version&0xff;
1464                         if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1465                                         goto err;
1466
1467                         s->session->master_key_length=sizeof tmp_buf;
1468
1469                         q=p;
1470                         /* Fix buf for TLS and beyond */
1471                         if (s->version > SSL3_VERSION)
1472                                 p+=2;
1473                         n=RSA_public_encrypt(sizeof tmp_buf,
1474                                 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1475 #ifdef PKCS1_CHECK
1476                         if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1477                         if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1478 #endif
1479                         if (n <= 0)
1480                                 {
1481                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1482                                 goto err;
1483                                 }
1484
1485                         /* Fix buf for TLS and beyond */
1486                         if (s->version > SSL3_VERSION)
1487                                 {
1488                                 s2n(n,q);
1489                                 n+=2;
1490                                 }
1491
1492                         s->session->master_key_length=
1493                                 s->method->ssl3_enc->generate_master_secret(s,
1494                                         s->session->master_key,
1495                                         tmp_buf,sizeof tmp_buf);
1496                         OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1497                         }
1498 #endif
1499 #ifndef OPENSSL_NO_KRB5
1500                 else if (l & SSL_kKRB5)
1501                         {
1502                         krb5_error_code krb5rc;
1503                         KSSL_CTX        *kssl_ctx = s->kssl_ctx;
1504                         /*  krb5_data   krb5_ap_req;  */
1505                         krb5_data       *enc_ticket;
1506                         krb5_data       authenticator, *authp = NULL;
1507                         EVP_CIPHER_CTX  ciph_ctx;
1508                         EVP_CIPHER      *enc = NULL;
1509                         unsigned char   iv[EVP_MAX_IV_LENGTH];
1510                         unsigned char   tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1511                         unsigned char   epms[SSL_MAX_MASTER_KEY_LENGTH
1512                                                 + EVP_MAX_IV_LENGTH];
1513                         int             padl, outl = sizeof(epms);
1514
1515                         EVP_CIPHER_CTX_init(&ciph_ctx);
1516
1517 #ifdef KSSL_DEBUG
1518                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1519                                 l, SSL_kKRB5);
1520 #endif  /* KSSL_DEBUG */
1521
1522                         authp = NULL;
1523 #ifdef KRB5SENDAUTH
1524                         if (KRB5SENDAUTH)  authp = &authenticator;
1525 #endif  /* KRB5SENDAUTH */
1526
1527                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1528                                 &kssl_err);
1529                         enc = kssl_map_enc(kssl_ctx->enctype);
1530                         if (enc == NULL)
1531                             goto err;
1532 #ifdef KSSL_DEBUG
1533                         {
1534                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
1535                         if (krb5rc && kssl_err.text)
1536                           printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1537                         }
1538 #endif  /* KSSL_DEBUG */
1539
1540                         if (krb5rc)
1541                                 {
1542                                 ssl3_send_alert(s,SSL3_AL_FATAL,
1543                                                 SSL_AD_HANDSHAKE_FAILURE);
1544                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1545                                                 kssl_err.reason);
1546                                 goto err;
1547                                 }
1548
1549                         /*  20010406 VRS - Earlier versions used KRB5 AP_REQ
1550                         **  in place of RFC 2712 KerberosWrapper, as in:
1551                         **
1552                         **  Send ticket (copy to *p, set n = length)
1553                         **  n = krb5_ap_req.length;
1554                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1555                         **  if (krb5_ap_req.data)
1556                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1557                         **
1558                         **  Now using real RFC 2712 KerberosWrapper
1559                         **  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1560                         **  Note: 2712 "opaque" types are here replaced
1561                         **  with a 2-byte length followed by the value.
1562                         **  Example:
1563                         **  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1564                         **  Where "xx xx" = length bytes.  Shown here with
1565                         **  optional authenticator omitted.
1566                         */
1567
1568                         /*  KerberosWrapper.Ticket              */
1569                         s2n(enc_ticket->length,p);
1570                         memcpy(p, enc_ticket->data, enc_ticket->length);
1571                         p+= enc_ticket->length;
1572                         n = enc_ticket->length + 2;
1573
1574                         /*  KerberosWrapper.Authenticator       */
1575                         if (authp  &&  authp->length)
1576                                 {
1577                                 s2n(authp->length,p);
1578                                 memcpy(p, authp->data, authp->length);
1579                                 p+= authp->length;
1580                                 n+= authp->length + 2;
1581
1582                                 free(authp->data);
1583                                 authp->data = NULL;
1584                                 authp->length = 0;
1585                                 }
1586                         else
1587                                 {
1588                                 s2n(0,p);/*  null authenticator length  */
1589                                 n+=2;
1590                                 }
1591
1592                         if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1593                             goto err;
1594
1595                         /*  20010420 VRS.  Tried it this way; failed.
1596                         **      EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1597                         **      EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1598                         **                              kssl_ctx->length);
1599                         **      EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1600                         */
1601
1602                         memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1603                         EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1604                                 kssl_ctx->key,iv);
1605                         EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1606                                 sizeof tmp_buf);
1607                         EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1608                         outl += padl;
1609                         if (outl > sizeof epms)
1610                                 {
1611                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1612                                 goto err;
1613                                 }
1614                         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1615
1616                         /*  KerberosWrapper.EncryptedPreMasterSecret    */
1617                         s2n(outl,p);
1618                         memcpy(p, epms, outl);
1619                         p+=outl;
1620                         n+=outl + 2;
1621
1622                         s->session->master_key_length=
1623                                 s->method->ssl3_enc->generate_master_secret(s,
1624                                         s->session->master_key,
1625                                         tmp_buf, sizeof tmp_buf);
1626
1627                         OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1628                         OPENSSL_cleanse(epms, outl);
1629                         }
1630 #endif
1631 #ifndef OPENSSL_NO_DH
1632                 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1633                         {
1634                         DH *dh_srvr,*dh_clnt;
1635
1636                         if (s->session->sess_cert->peer_dh_tmp != NULL)
1637                                 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1638                         else
1639                                 {
1640                                 /* we get them from the cert */
1641                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1642                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1643                                 goto err;
1644                                 }
1645
1646                         /* generate a new random key */
1647                         if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1648                                 {
1649                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1650                                 goto err;
1651                                 }
1652                         if (!DH_generate_key(dh_clnt))
1653                                 {
1654                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1655                                 goto err;
1656                                 }
1657
1658                         /* use the 'p' output buffer for the DH key, but
1659                          * make sure to clear it out afterwards */
1660
1661                         n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1662
1663                         if (n <= 0)
1664                                 {
1665                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1666                                 goto err;
1667                                 }
1668
1669                         /* generate master key from the result */
1670                         s->session->master_key_length=
1671                                 s->method->ssl3_enc->generate_master_secret(s,
1672                                         s->session->master_key,p,n);
1673                         /* clean up */
1674                         memset(p,0,n);
1675
1676                         /* send off the data */
1677                         n=BN_num_bytes(dh_clnt->pub_key);
1678                         s2n(n,p);
1679                         BN_bn2bin(dh_clnt->pub_key,p);
1680                         n+=2;
1681
1682                         DH_free(dh_clnt);
1683
1684                         /* perhaps clean things up a bit EAY EAY EAY EAY*/
1685                         }
1686 #endif
1687                 else
1688                         {
1689                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1690                         SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1691                         goto err;
1692                         }
1693
1694                 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1695                 l2n3(n,d);
1696
1697                 s->state=SSL3_ST_CW_KEY_EXCH_B;
1698                 /* number of bytes to write */
1699                 s->init_num=n+4;
1700                 s->init_off=0;
1701                 }
1702
1703         /* SSL3_ST_CW_KEY_EXCH_B */
1704         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1705 err:
1706         return(-1);
1707         }
1708
1709 static int ssl3_send_client_verify(SSL *s)
1710         {
1711         unsigned char *p,*d;
1712         unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1713         EVP_PKEY *pkey;
1714 #ifndef OPENSSL_NO_RSA
1715         unsigned u=0;
1716 #endif
1717         unsigned long n;
1718 #ifndef OPENSSL_NO_DSA
1719         int j;
1720 #endif
1721
1722         if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1723                 {
1724                 d=(unsigned char *)s->init_buf->data;
1725                 p= &(d[4]);
1726                 pkey=s->cert->key->privatekey;
1727
1728                 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1729                         &(data[MD5_DIGEST_LENGTH]));
1730
1731 #ifndef OPENSSL_NO_RSA
1732                 if (pkey->type == EVP_PKEY_RSA)
1733                         {
1734                         s->method->ssl3_enc->cert_verify_mac(s,
1735                                 &(s->s3->finish_dgst1),&(data[0]));
1736                         if (RSA_sign(NID_md5_sha1, data,
1737                                          MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1738                                         &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1739                                 {
1740                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1741                                 goto err;
1742                                 }
1743                         s2n(u,p);
1744                         n=u+2;
1745                         }
1746                 else
1747 #endif
1748 #ifndef OPENSSL_NO_DSA
1749                         if (pkey->type == EVP_PKEY_DSA)
1750                         {
1751                         if (!DSA_sign(pkey->save_type,
1752                                 &(data[MD5_DIGEST_LENGTH]),
1753                                 SHA_DIGEST_LENGTH,&(p[2]),
1754                                 (unsigned int *)&j,pkey->pkey.dsa))
1755                                 {
1756                                 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1757                                 goto err;
1758                                 }
1759                         s2n(j,p);
1760                         n=j+2;
1761                         }
1762                 else
1763 #endif
1764                         {
1765                         SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1766                         goto err;
1767                         }
1768                 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1769                 l2n3(n,d);
1770
1771                 s->state=SSL3_ST_CW_CERT_VRFY_B;
1772                 s->init_num=(int)n+4;
1773                 s->init_off=0;
1774                 }
1775         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1776 err:
1777         return(-1);
1778         }
1779
1780 static int ssl3_send_client_certificate(SSL *s)
1781         {
1782         X509 *x509=NULL;
1783         EVP_PKEY *pkey=NULL;
1784         int i;
1785         unsigned long l;
1786
1787         if (s->state == SSL3_ST_CW_CERT_A)
1788                 {
1789                 if ((s->cert == NULL) ||
1790                         (s->cert->key->x509 == NULL) ||
1791                         (s->cert->key->privatekey == NULL))
1792                         s->state=SSL3_ST_CW_CERT_B;
1793                 else
1794                         s->state=SSL3_ST_CW_CERT_C;
1795                 }
1796
1797         /* We need to get a client cert */
1798         if (s->state == SSL3_ST_CW_CERT_B)
1799                 {
1800                 /* If we get an error, we need to
1801                  * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1802                  * We then get retied later */
1803                 i=0;
1804                 if (s->ctx->client_cert_cb != NULL)
1805                         i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1806                 if (i < 0)
1807                         {
1808                         s->rwstate=SSL_X509_LOOKUP;
1809                         return(-1);
1810                         }
1811                 s->rwstate=SSL_NOTHING;
1812                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1813                         {
1814                         s->state=SSL3_ST_CW_CERT_B;
1815                         if (    !SSL_use_certificate(s,x509) ||
1816                                 !SSL_use_PrivateKey(s,pkey))
1817                                 i=0;
1818                         }
1819                 else if (i == 1)
1820                         {
1821                         i=0;
1822                         SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1823                         }
1824
1825                 if (x509 != NULL) X509_free(x509);
1826                 if (pkey != NULL) EVP_PKEY_free(pkey);
1827                 if (i == 0)
1828                         {
1829                         if (s->version == SSL3_VERSION)
1830                                 {
1831                                 s->s3->tmp.cert_req=0;
1832                                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1833                                 return(1);
1834                                 }
1835                         else
1836                                 {
1837                                 s->s3->tmp.cert_req=2;
1838                                 }
1839                         }
1840
1841                 /* Ok, we have a cert */
1842                 s->state=SSL3_ST_CW_CERT_C;
1843                 }
1844
1845         if (s->state == SSL3_ST_CW_CERT_C)
1846                 {
1847                 s->state=SSL3_ST_CW_CERT_D;
1848                 l=ssl3_output_cert_chain(s,
1849                         (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1850                 s->init_num=(int)l;
1851                 s->init_off=0;
1852                 }
1853         /* SSL3_ST_CW_CERT_D */
1854         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1855         }
1856
1857 #define has_bits(i,m)   (((i)&(m)) == (m))
1858
1859 static int ssl3_check_cert_and_algorithm(SSL *s)
1860         {
1861         int i,idx;
1862         long algs;
1863         EVP_PKEY *pkey=NULL;
1864         SESS_CERT *sc;
1865 #ifndef OPENSSL_NO_RSA
1866         RSA *rsa;
1867 #endif
1868 #ifndef OPENSSL_NO_DH
1869         DH *dh;
1870 #endif
1871
1872         sc=s->session->sess_cert;
1873
1874         if (sc == NULL)
1875                 {
1876                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
1877                 goto err;
1878                 }
1879
1880         algs=s->s3->tmp.new_cipher->algorithms;
1881
1882         /* we don't have a certificate */
1883         if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
1884                 return(1);
1885
1886 #ifndef OPENSSL_NO_RSA
1887         rsa=s->session->sess_cert->peer_rsa_tmp;
1888 #endif
1889 #ifndef OPENSSL_NO_DH
1890         dh=s->session->sess_cert->peer_dh_tmp;
1891 #endif
1892
1893         /* This is the passed certificate */
1894
1895         idx=sc->peer_cert_type;
1896         pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1897         i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1898         EVP_PKEY_free(pkey);
1899
1900
1901         /* Check that we have a certificate if we require one */
1902         if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1903                 {
1904                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1905                 goto f_err;
1906                 }
1907 #ifndef OPENSSL_NO_DSA
1908         else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1909                 {
1910                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1911                 goto f_err;
1912                 }
1913 #endif
1914 #ifndef OPENSSL_NO_RSA
1915         if ((algs & SSL_kRSA) &&
1916                 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1917                 {
1918                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1919                 goto f_err;
1920                 }
1921 #endif
1922 #ifndef OPENSSL_NO_DH
1923         if ((algs & SSL_kEDH) &&
1924                 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1925                 {
1926                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1927                 goto f_err;
1928                 }
1929         else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1930                 {
1931                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1932                 goto f_err;
1933                 }
1934 #ifndef OPENSSL_NO_DSA
1935         else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1936                 {
1937                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1938                 goto f_err;
1939                 }
1940 #endif
1941 #endif
1942
1943         if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1944                 {
1945 #ifndef OPENSSL_NO_RSA
1946                 if (algs & SSL_kRSA)
1947                         {
1948                         if (rsa == NULL
1949                             || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1950                                 {
1951                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1952                                 goto f_err;
1953                                 }
1954                         }
1955                 else
1956 #endif
1957 #ifndef OPENSSL_NO_DH
1958                         if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1959                             {
1960                             if (dh == NULL
1961                                 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1962                                 {
1963                                 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1964                                 goto f_err;
1965                                 }
1966                         }
1967                 else
1968 #endif
1969                         {
1970                         SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1971                         goto f_err;
1972                         }
1973                 }
1974         return(1);
1975 f_err:
1976         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1977 err:
1978         return(0);
1979         }
1980