src/third_party/boringssl/src/ssl/s23_srvr.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57 /* ====================================================================
  58  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
  59  *
  60  * Redistribution and use in source and binary forms, with or without
  61  * modification, are permitted provided that the following conditions
  62  * are met:
  63  *
  64  * 1. Redistributions of source code must retain the above copyright
  65  *    notice, this list of conditions and the following disclaimer.
  66  *
  67  * 2. Redistributions in binary form must reproduce the above copyright
  68  *    notice, this list of conditions and the following disclaimer in
  69  *    the documentation and/or other materials provided with the
  70  *    distribution.
  71  *
  72  * 3. All advertising materials mentioning features or use of this
  73  *    software must display the following acknowledgment:
  74  *    "This product includes software developed by the OpenSSL Project
  75  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  76  *
  77  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  78  *    endorse or promote products derived from this software without
  79  *    prior written permission. For written permission, please contact
  80  *    openssl-core@openssl.org.
  81  *
  82  * 5. Products derived from this software may not be called "OpenSSL"
  83  *    nor may "OpenSSL" appear in their names without prior written
  84  *    permission of the OpenSSL Project.
  85  *
  86  * 6. Redistributions of any form whatsoever must retain the following
  87  *    acknowledgment:
  88  *    "This product includes software developed by the OpenSSL Project
  89  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  90  *
  91  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  92  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  93  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  94  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  95  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  96  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  97  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  98  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  99  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 100  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 101  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 102  * OF THE POSSIBILITY OF SUCH DAMAGE.
 103  * ====================================================================
 104  *
 105  * This product includes cryptographic software written by Eric Young
 106  * (eay@cryptsoft.com).  This product includes software written by Tim
 107  * Hudson (tjh@cryptsoft.com). */
 108
 109 #include <stdio.h>
 110
 111 #include <openssl/buf.h>
 112 #include <openssl/err.h>
 113 #include <openssl/evp.h>
 114 #include <openssl/mem.h>
 115 #include <openssl/obj.h>
 116 #include <openssl/rand.h>
 117
 118 #include "ssl_locl.h"
 119
 120 static const SSL_METHOD *ssl23_get_server_method(int ver);
 121 int ssl23_get_client_hello(SSL *s);
 122 static const SSL_METHOD *ssl23_get_server_method(int ver)
 123         {
 124         if (ver == SSL3_VERSION)
 125                 return(SSLv3_server_method());
 126         else if (ver == TLS1_VERSION)
 127                 return(TLSv1_server_method());
 128         else if (ver == TLS1_1_VERSION)
 129                 return(TLSv1_1_server_method());
 130         else if (ver == TLS1_2_VERSION)
 131                 return(TLSv1_2_server_method());
 132         else
 133                 return(NULL);
 134         }
 135
 136 IMPLEMENT_ssl23_meth_func(SSLv23_server_method,
 137                         ssl23_accept,
 138                         ssl_undefined_function,
 139                         ssl23_get_server_method)
 140
 141 int ssl23_accept(SSL *s)
 142         {
 143         BUF_MEM *buf;
 144         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 145         int ret= -1;
 146         int new_state,state;
 147
 148         ERR_clear_error();
 149         ERR_clear_system_error();
 150
 151         if (s->info_callback != NULL)
 152                 cb=s->info_callback;
 153         else if (s->ctx->info_callback != NULL)
 154                 cb=s->ctx->info_callback;
 155
 156         s->in_handshake++;
 157         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 158
 159         for (;;)
 160                 {
 161                 state=s->state;
 162
 163                 switch(s->state)
 164                         {
 165                 case SSL_ST_BEFORE:
 166                 case SSL_ST_ACCEPT:
 167                 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
 168                 case SSL_ST_OK|SSL_ST_ACCEPT:
 169
 170                         s->server=1;
 171                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 172
 173                         /* s->version=SSL3_VERSION; */
 174                         s->type=SSL_ST_ACCEPT;
 175
 176                         if (s->init_buf == NULL)
 177                                 {
 178                                 if ((buf=BUF_MEM_new()) == NULL)
 179                                         {
 180                                         ret= -1;
 181                                         goto end;
 182                                         }
 183                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 184                                         {
 185                                         ret= -1;
 186                                         goto end;
 187                                         }
 188                                 s->init_buf=buf;
 189                                 }
 190
 191                         ssl3_init_finished_mac(s);
 192
 193                         s->state=SSL23_ST_SR_CLNT_HELLO_A;
 194                         s->ctx->stats.sess_accept++;
 195                         s->init_num=0;
 196                         break;
 197
 198                 case SSL23_ST_SR_CLNT_HELLO_A:
 199                 case SSL23_ST_SR_CLNT_HELLO_B:
 200
 201                         s->shutdown=0;
 202                         ret=ssl23_get_client_hello(s);
 203                         if (ret >= 0) cb=NULL;
 204                         goto end;
 205                         /* break; */
 206
 207                 default:
 208                         OPENSSL_PUT_ERROR(SSL, ssl23_accept, SSL_R_UNKNOWN_STATE);
 209                         ret= -1;
 210                         goto end;
 211                         /* break; */
 212                         }
 213
 214                 if ((cb != NULL) && (s->state != state))
 215                         {
 216                         new_state=s->state;
 217                         s->state=state;
 218                         cb(s,SSL_CB_ACCEPT_LOOP,1);
 219                         s->state=new_state;
 220                         }
 221                 }
 222 end:
 223         s->in_handshake--;
 224         if (cb != NULL)
 225                 cb(s,SSL_CB_ACCEPT_EXIT,ret);
 226         return(ret);
 227         }
 228
 229
 230 int ssl23_get_client_hello(SSL *s)
 231         {
 232         char buf_space[11]; /* Request this many bytes in initial read.
 233                              * We can detect SSL 3.0/TLS 1.0 Client Hellos
 234                              * ('type == 3') correctly only when the following
 235                              * is in a single record, which is not guaranteed by
 236                              * the protocol specification:
 237                              * Byte  Content
 238                              *  0     type            \
 239                              *  1/2   version          > record header
 240                              *  3/4   length          /
 241                              *  5     msg_type        \
 242                              *  6-8   length           > Client Hello message
 243                              *  9/10  client_version  /
 244                              */
 245         char *buf= &(buf_space[0]);
 246         unsigned char *p,*d,*d_len,*dd;
 247         unsigned int i;
 248         unsigned int csl,sil,cl;
 249         int n=0,j;
 250         int type=0;
 251         int v[2];
 252
 253         if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
 254                 {
 255                 /* read the initial header */
 256                 v[0]=v[1]=0;
 257
 258                 if (!ssl3_setup_buffers(s)) goto err;
 259
 260                 n=ssl23_read_bytes(s, sizeof buf_space);
 261                 if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */
 262
 263                 p=s->packet;
 264
 265                 memcpy(buf,p,n);
 266
 267                 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
 268                         {
 269                         /*
 270                          * SSLv2 header
 271                          */
 272                         if ((p[3] == 0x00) && (p[4] == 0x02))
 273                                 {
 274                                 v[0]=p[3]; v[1]=p[4];
 275                                 /* SSLv2 */
 276                                 if (!(s->options & SSL_OP_NO_SSLv2))
 277                                         type=1;
 278                                 }
 279                         else if (p[3] == SSL3_VERSION_MAJOR)
 280                                 {
 281                                 v[0]=p[3]; v[1]=p[4];
 282                                 /* SSLv3/TLSv1 */
 283                                 if (p[4] >= TLS1_VERSION_MINOR)
 284                                         {
 285                                         if (p[4] >= TLS1_2_VERSION_MINOR &&
 286                                            !(s->options & SSL_OP_NO_TLSv1_2))
 287                                                 {
 288                                                 s->version=TLS1_2_VERSION;
 289                                                 s->state=SSL23_ST_SR_CLNT_HELLO_B;
 290                                                 }
 291                                         else if (p[4] >= TLS1_1_VERSION_MINOR &&
 292                                            !(s->options & SSL_OP_NO_TLSv1_1))
 293                                                 {
 294                                                 s->version=TLS1_1_VERSION;
 295                                                 /* type=2; */ /* done later to survive restarts */
 296                                                 s->state=SSL23_ST_SR_CLNT_HELLO_B;
 297                                                 }
 298                                         else if (!(s->options & SSL_OP_NO_TLSv1))
 299                                                 {
 300                                                 s->version=TLS1_VERSION;
 301                                                 /* type=2; */ /* done later to survive restarts */
 302                                                 s->state=SSL23_ST_SR_CLNT_HELLO_B;
 303                                                 }
 304                                         else if (!(s->options & SSL_OP_NO_SSLv3))
 305                                                 {
 306                                                 s->version=SSL3_VERSION;
 307                                                 /* type=2; */
 308                                                 s->state=SSL23_ST_SR_CLNT_HELLO_B;
 309                                                 }
 310                                         else if (!(s->options & SSL_OP_NO_SSLv2))
 311                                                 {
 312                                                 type=1;
 313                                                 }
 314                                         }
 315                                 else if (!(s->options & SSL_OP_NO_SSLv3))
 316                                         {
 317                                         s->version=SSL3_VERSION;
 318                                         /* type=2; */
 319                                         s->state=SSL23_ST_SR_CLNT_HELLO_B;
 320                                         }
 321                                 else if (!(s->options & SSL_OP_NO_SSLv2))
 322                                         type=1;
 323
 324                                 }
 325                         }
 326                 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
 327                          (p[1] == SSL3_VERSION_MAJOR) &&
 328                          (p[5] == SSL3_MT_CLIENT_HELLO) &&
 329                          ((p[3] == 0 && p[4] < 5 /* silly record length? */)
 330                                 || (p[9] >= p[1])))
 331                         {
 332                         /*
 333                          * SSLv3 or tls1 header
 334                          */
 335
 336                         v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
 337                         /* We must look at client_version inside the Client Hello message
 338                          * to get the correct minor version.
 339                          * However if we have only a pathologically small fragment of the
 340                          * Client Hello message, this would be difficult, and we'd have
 341                          * to read more records to find out.
 342                          * No known SSL 3.0 client fragments ClientHello like this,
 343                          * so we simply assume TLS 1.0 to avoid protocol version downgrade
 344                          * attacks. */
 345                         if (p[3] == 0 && p[4] < 6)
 346                                 {
 347 #if 0
 348                                 OPENSSL_PUT_ERROR(SSL, XXX, SSL_R_RECORD_TOO_SMALL);
 349                                 goto err;
 350 #else
 351                                 v[1] = TLS1_VERSION_MINOR;
 352 #endif
 353                                 }
 354                         /* if major version number > 3 set minor to a value
 355                          * which will use the highest version 3 we support.
 356                          * If TLS 2.0 ever appears we will need to revise
 357                          * this....
 358                          */
 359                         else if (p[9] > SSL3_VERSION_MAJOR)
 360                                 v[1]=0xff;
 361                         else
 362                                 v[1]=p[10]; /* minor version according to client_version */
 363                         if (v[1] >= TLS1_VERSION_MINOR)
 364                                 {
 365                                 if (v[1] >= TLS1_2_VERSION_MINOR &&
 366                                         !(s->options & SSL_OP_NO_TLSv1_2))
 367                                         {
 368                                         s->version=TLS1_2_VERSION;
 369                                         type=3;
 370                                         }
 371                                 else if (v[1] >= TLS1_1_VERSION_MINOR &&
 372                                         !(s->options & SSL_OP_NO_TLSv1_1))
 373                                         {
 374                                         s->version=TLS1_1_VERSION;
 375                                         type=3;
 376                                         }
 377                                 else if (!(s->options & SSL_OP_NO_TLSv1))
 378                                         {
 379                                         s->version=TLS1_VERSION;
 380                                         type=3;
 381                                         }
 382                                 else if (!(s->options & SSL_OP_NO_SSLv3))
 383                                         {
 384                                         s->version=SSL3_VERSION;
 385                                         type=3;
 386                                         }
 387                                 }
 388                         else
 389                                 {
 390                                 /* client requests SSL 3.0 */
 391                                 if (!(s->options & SSL_OP_NO_SSLv3))
 392                                         {
 393                                         s->version=SSL3_VERSION;
 394                                         type=3;
 395                                         }
 396                                 else if (!(s->options & SSL_OP_NO_TLSv1))
 397                                         {
 398                                         /* we won't be able to use TLS of course,
 399                                          * but this will send an appropriate alert */
 400                                         s->version=TLS1_VERSION;
 401                                         type=3;
 402                                         }
 403                                 }
 404                         }
 405                 else if ((strncmp("GET ", (char *)p,4) == 0) ||
 406                          (strncmp("POST ",(char *)p,5) == 0) ||
 407                          (strncmp("HEAD ",(char *)p,5) == 0) ||
 408                          (strncmp("PUT ", (char *)p,4) == 0))
 409                         {
 410                         OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_HTTP_REQUEST);
 411                         goto err;
 412                         }
 413                 else if (strncmp("CONNECT",(char *)p,7) == 0)
 414                         {
 415                         OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_HTTPS_PROXY_REQUEST);
 416                         goto err;
 417                         }
 418                 }
 419
 420         if (s->version < TLS1_2_VERSION && tls1_suiteb(s))
 421                 {
 422                 OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
 423                 goto err;
 424                 }
 425
 426         if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
 427                 {
 428                 /* we have SSLv3/TLSv1 in an SSLv2 header
 429                  * (other cases skip this state) */
 430
 431                 type=2;
 432                 p=s->packet;
 433                 v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
 434                 v[1] = p[4];
 435
 436                 n=((p[0]&0x7f)<<8)|p[1];
 437                 if (n > (1024*4))
 438                         {
 439                         OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_RECORD_TOO_LARGE);
 440                         goto err;
 441                         }
 442
 443                 j=ssl23_read_bytes(s,n+2);
 444                 if (j <= 0) return(j);
 445
 446                 ssl3_finish_mac(s, s->packet+2, s->packet_length-2);
 447                 if (s->msg_callback)
 448                         s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
 449
 450                 p=s->packet;
 451                 p+=5;
 452                 n2s(p,csl);
 453                 n2s(p,sil);
 454                 n2s(p,cl);
 455                 d=(unsigned char *)s->init_buf->data;
 456                 if ((csl+sil+cl+11) != s->packet_length) /* We can't have TLS extensions in SSL 2.0 format
 457                                                           * Client Hello, can we? Error condition should be
 458                                                           * '>' otherweise */
 459                         {
 460                         OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_RECORD_LENGTH_MISMATCH);
 461                         goto err;
 462                         }
 463
 464                 /* record header: msg_type ... */
 465                 *(d++) = SSL3_MT_CLIENT_HELLO;
 466                 /* ... and length (actual value will be written later) */
 467                 d_len = d;
 468                 d += 3;
 469
 470                 /* client_version */
 471                 *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
 472                 *(d++) = v[1];
 473
 474                 /* lets populate the random area */
 475                 /* get the challenge_length */
 476                 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
 477                 memset(d,0,SSL3_RANDOM_SIZE);
 478                 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
 479                 d+=SSL3_RANDOM_SIZE;
 480
 481                 /* no session-id reuse */
 482                 *(d++)=0;
 483
 484                 /* ciphers */
 485                 j=0;
 486                 dd=d;
 487                 d+=2;
 488                 for (i=0; i<csl; i+=3)
 489                         {
 490                         if (p[i] != 0) continue;
 491                         *(d++)=p[i+1];
 492                         *(d++)=p[i+2];
 493                         j+=2;
 494                         }
 495                 s2n(j,dd);
 496
 497                 /* COMPRESSION */
 498                 *(d++)=1;
 499                 *(d++)=0;
 500
 501 #if 0
 502                 /* copy any remaining data with may be extensions */
 503                 p = p+csl+sil+cl;
 504                 while (p <  s->packet+s->packet_length)
 505                         {
 506                         *(d++)=*(p++);
 507                         }
 508 #endif
 509
 510                 i = (d-(unsigned char *)s->init_buf->data) - 4;
 511                 l2n3((long)i, d_len);
 512
 513                 /* get the data reused from the init_buf */
 514                 s->s3->tmp.reuse_message=1;
 515                 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
 516                 s->s3->tmp.message_size=i;
 517                 }
 518
 519         /* imaginary new state (for program structure): */
 520         /* s->state = SSL23_SR_CLNT_HELLO_C */
 521
 522         if (type == 1)
 523                 {
 524                 OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_UNSUPPORTED_PROTOCOL);
 525                 goto err;
 526                 }
 527
 528         if ((type == 2) || (type == 3))
 529                 {
 530                 /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
 531
 532                 if (!ssl_init_wbio_buffer(s,1)) goto err;
 533
 534                 /* we are in this state */
 535                 s->state=SSL3_ST_SR_CLNT_HELLO_A;
 536
 537                 if (type == 3)
 538                         {
 539                         /* put the 'n' bytes we have read into the input buffer
 540                          * for SSLv3 */
 541                         s->rstate=SSL_ST_READ_HEADER;
 542                         s->packet_length=n;
 543                         if (s->s3->rbuf.buf == NULL)
 544                                 if (!ssl3_setup_read_buffer(s))
 545                                         goto err;
 546
 547                         s->packet= &(s->s3->rbuf.buf[0]);
 548                         memcpy(s->packet,buf,n);
 549                         s->s3->rbuf.left=n;
 550                         s->s3->rbuf.offset=0;
 551                         }
 552                 else
 553                         {
 554                         s->packet_length=0;
 555                         s->s3->rbuf.left=0;
 556                         s->s3->rbuf.offset=0;
 557                         }
 558                 if (s->version == TLS1_2_VERSION)
 559                         s->method = TLSv1_2_server_method();
 560                 else if (s->version == TLS1_1_VERSION)
 561                         s->method = TLSv1_1_server_method();
 562                 else if (s->version == TLS1_VERSION)
 563                         s->method = TLSv1_server_method();
 564                 else
 565                         s->method = SSLv3_server_method();
 566 #if 0 /* ssl3_get_client_hello does this */
 567                 s->client_version=(v[0]<<8)|v[1];
 568 #endif
 569                 s->handshake_func=s->method->ssl_accept;
 570                 }
 571
 572         if ((type < 1) || (type > 3))
 573                 {
 574                 /* bad, very bad */
 575                 OPENSSL_PUT_ERROR(SSL, ssl23_get_client_hello, SSL_R_UNKNOWN_PROTOCOL);
 576                 goto err;
 577                 }
 578         s->init_num=0;
 579
 580         if (buf != buf_space) OPENSSL_free(buf);
 581         return(SSL_accept(s));
 582 err:
 583         if (buf != buf_space) OPENSSL_free(buf);
 584         return(-1);
 585         }