crypto/openssl-0.9.7e/ssl/s23_srvr.c

   1 /* ssl/s23_srvr.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) 1998-2001 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 <openssl/buffer.h>
 115 #include <openssl/rand.h>
 116 #include <openssl/objects.h>
 117 #include <openssl/evp.h>
 118
 119 static SSL_METHOD *ssl23_get_server_method(int ver);
 120 int ssl23_get_client_hello(SSL *s);
 121 static SSL_METHOD *ssl23_get_server_method(int ver)
 122         {
 123 #ifndef OPENSSL_NO_SSL2
 124         if (ver == SSL2_VERSION)
 125                 return(SSLv2_server_method());
 126 #endif
 127         if (ver == SSL3_VERSION)
 128                 return(SSLv3_server_method());
 129         else if (ver == TLS1_VERSION)
 130                 return(TLSv1_server_method());
 131         else
 132                 return(NULL);
 133         }
 134
 135 SSL_METHOD *SSLv23_server_method(void)
 136         {
 137         static int init=1;
 138         static SSL_METHOD SSLv23_server_data;
 139
 140         if (init)
 141                 {
 142                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
 143
 144                 if (init)
 145                         {
 146                         memcpy((char *)&SSLv23_server_data,
 147                                 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
 148                         SSLv23_server_data.ssl_accept=ssl23_accept;
 149                         SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
 150                         init=0;
 151                         }
 152
 153                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
 154                 }
 155         return(&SSLv23_server_data);
 156         }
 157
 158 int ssl23_accept(SSL *s)
 159         {
 160         BUF_MEM *buf;
 161         unsigned long Time=time(NULL);
 162         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 163         int ret= -1;
 164         int new_state,state;
 165
 166         RAND_add(&Time,sizeof(Time),0);
 167         ERR_clear_error();
 168         clear_sys_error();
 169
 170         if (s->info_callback != NULL)
 171                 cb=s->info_callback;
 172         else if (s->ctx->info_callback != NULL)
 173                 cb=s->ctx->info_callback;
 174
 175         s->in_handshake++;
 176         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 177
 178         for (;;)
 179                 {
 180                 state=s->state;
 181
 182                 switch(s->state)
 183                         {
 184                 case SSL_ST_BEFORE:
 185                 case SSL_ST_ACCEPT:
 186                 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
 187                 case SSL_ST_OK|SSL_ST_ACCEPT:
 188
 189                         s->server=1;
 190                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 191
 192                         /* s->version=SSL3_VERSION; */
 193                         s->type=SSL_ST_ACCEPT;
 194
 195                         if (s->init_buf == NULL)
 196                                 {
 197                                 if ((buf=BUF_MEM_new()) == NULL)
 198                                         {
 199                                         ret= -1;
 200                                         goto end;
 201                                         }
 202                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 203                                         {
 204                                         ret= -1;
 205                                         goto end;
 206                                         }
 207                                 s->init_buf=buf;
 208                                 }
 209
 210                         ssl3_init_finished_mac(s);
 211
 212                         s->state=SSL23_ST_SR_CLNT_HELLO_A;
 213                         s->ctx->stats.sess_accept++;
 214                         s->init_num=0;
 215                         break;
 216
 217                 case SSL23_ST_SR_CLNT_HELLO_A:
 218                 case SSL23_ST_SR_CLNT_HELLO_B:
 219
 220                         s->shutdown=0;
 221                         ret=ssl23_get_client_hello(s);
 222                         if (ret >= 0) cb=NULL;
 223                         goto end;
 224                         /* break; */
 225
 226                 default:
 227                         SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
 228                         ret= -1;
 229                         goto end;
 230                         /* break; */
 231                         }
 232
 233                 if ((cb != NULL) && (s->state != state))
 234                         {
 235                         new_state=s->state;
 236                         s->state=state;
 237                         cb(s,SSL_CB_ACCEPT_LOOP,1);
 238                         s->state=new_state;
 239                         }
 240                 }
 241 end:
 242         s->in_handshake--;
 243         if (cb != NULL)
 244                 cb(s,SSL_CB_ACCEPT_EXIT,ret);
 245         return(ret);
 246         }
 247
 248
 249 int ssl23_get_client_hello(SSL *s)
 250         {
 251         char buf_space[11]; /* Request this many bytes in initial read.
 252                              * We can detect SSL 3.0/TLS 1.0 Client Hellos
 253                              * ('type == 3') correctly only when the following
 254                              * is in a single record, which is not guaranteed by
 255                              * the protocol specification:
 256                              * Byte  Content
 257                              *  0     type            \
 258                              *  1/2   version          > record header
 259                              *  3/4   length          /
 260                              *  5     msg_type        \
 261                              *  6-8   length           > Client Hello message
 262                              *  9/10  client_version  /
 263                              */
 264         char *buf= &(buf_space[0]);
 265         unsigned char *p,*d,*d_len,*dd;
 266         unsigned int i;
 267         unsigned int csl,sil,cl;
 268         int n=0,j;
 269         int type=0;
 270         int v[2];
 271 #ifndef OPENSSL_NO_RSA
 272         int use_sslv2_strong=0;
 273 #endif
 274
 275         if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
 276                 {
 277                 /* read the initial header */
 278                 v[0]=v[1]=0;
 279
 280                 if (!ssl3_setup_buffers(s)) goto err;
 281
 282                 n=ssl23_read_bytes(s, sizeof buf_space);
 283                 if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */
 284
 285                 p=s->packet;
 286
 287                 memcpy(buf,p,n);
 288
 289                 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
 290                         {
 291                         /*
 292                          * SSLv2 header
 293                          */
 294                         if ((p[3] == 0x00) && (p[4] == 0x02))
 295                                 {
 296                                 v[0]=p[3]; v[1]=p[4];
 297                                 /* SSLv2 */
 298                                 if (!(s->options & SSL_OP_NO_SSLv2))
 299                                         type=1;
 300                                 }
 301                         else if (p[3] == SSL3_VERSION_MAJOR)
 302                                 {
 303                                 v[0]=p[3]; v[1]=p[4];
 304                                 /* SSLv3/TLSv1 */
 305                                 if (p[4] >= TLS1_VERSION_MINOR)
 306                                         {
 307                                         if (!(s->options & SSL_OP_NO_TLSv1))
 308                                                 {
 309                                                 s->version=TLS1_VERSION;
 310                                                 /* type=2; */ /* done later to survive restarts */
 311                                                 s->state=SSL23_ST_SR_CLNT_HELLO_B;
 312                                                 }
 313                                         else if (!(s->options & SSL_OP_NO_SSLv3))
 314                                                 {
 315                                                 s->version=SSL3_VERSION;
 316                                                 /* type=2; */
 317                                                 s->state=SSL23_ST_SR_CLNT_HELLO_B;
 318                                                 }
 319                                         else if (!(s->options & SSL_OP_NO_SSLv2))
 320                                                 {
 321                                                 type=1;
 322                                                 }
 323                                         }
 324                                 else if (!(s->options & SSL_OP_NO_SSLv3))
 325                                         {
 326                                         s->version=SSL3_VERSION;
 327                                         /* type=2; */
 328                                         s->state=SSL23_ST_SR_CLNT_HELLO_B;
 329                                         }
 330                                 else if (!(s->options & SSL_OP_NO_SSLv2))
 331                                         type=1;
 332
 333                                 }
 334                         }
 335                 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
 336                          (p[1] == SSL3_VERSION_MAJOR) &&
 337                          (p[5] == SSL3_MT_CLIENT_HELLO) &&
 338                          ((p[3] == 0 && p[4] < 5 /* silly record length? */)
 339                                 || (p[9] == p[1])))
 340                         {
 341                         /*
 342                          * SSLv3 or tls1 header
 343                          */
 344
 345                         v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
 346                         /* We must look at client_version inside the Client Hello message
 347                          * to get the correct minor version.
 348                          * However if we have only a pathologically small fragment of the
 349                          * Client Hello message, this would be difficult, and we'd have
 350                          * to read more records to find out.
 351                          * No known SSL 3.0 client fragments ClientHello like this,
 352                          * so we simply assume TLS 1.0 to avoid protocol version downgrade
 353                          * attacks. */
 354                         if (p[3] == 0 && p[4] < 6)
 355                                 {
 356 #if 0
 357                                 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL);
 358                                 goto err;
 359 #else
 360                                 v[1] = TLS1_VERSION_MINOR;
 361 #endif
 362                                 }
 363                         else
 364                                 v[1]=p[10]; /* minor version according to client_version */
 365                         if (v[1] >= TLS1_VERSION_MINOR)
 366                                 {
 367                                 if (!(s->options & SSL_OP_NO_TLSv1))
 368                                         {
 369                                         s->version=TLS1_VERSION;
 370                                         type=3;
 371                                         }
 372                                 else if (!(s->options & SSL_OP_NO_SSLv3))
 373                                         {
 374                                         s->version=SSL3_VERSION;
 375                                         type=3;
 376                                         }
 377                                 }
 378                         else
 379                                 {
 380                                 /* client requests SSL 3.0 */
 381                                 if (!(s->options & SSL_OP_NO_SSLv3))
 382                                         {
 383                                         s->version=SSL3_VERSION;
 384                                         type=3;
 385                                         }
 386                                 else if (!(s->options & SSL_OP_NO_TLSv1))
 387                                         {
 388                                         /* we won't be able to use TLS of course,
 389                                          * but this will send an appropriate alert */
 390                                         s->version=TLS1_VERSION;
 391                                         type=3;
 392                                         }
 393                                 }
 394                         }
 395                 else if ((strncmp("GET ", (char *)p,4) == 0) ||
 396                          (strncmp("POST ",(char *)p,5) == 0) ||
 397                          (strncmp("HEAD ",(char *)p,5) == 0) ||
 398                          (strncmp("PUT ", (char *)p,4) == 0))
 399                         {
 400                         SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
 401                         goto err;
 402                         }
 403                 else if (strncmp("CONNECT",(char *)p,7) == 0)
 404                         {
 405                         SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
 406                         goto err;
 407                         }
 408                 }
 409
 410         if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
 411                 {
 412                 /* we have SSLv3/TLSv1 in an SSLv2 header
 413                  * (other cases skip this state) */
 414
 415                 type=2;
 416                 p=s->packet;
 417                 v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
 418                 v[1] = p[4];
 419
 420                 n=((p[0]&0x7f)<<8)|p[1];
 421                 if (n > (1024*4))
 422                         {
 423                         SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
 424                         goto err;
 425                         }
 426
 427                 j=ssl23_read_bytes(s,n+2);
 428                 if (j <= 0) return(j);
 429
 430                 ssl3_finish_mac(s, s->packet+2, s->packet_length-2);
 431                 if (s->msg_callback)
 432                         s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
 433
 434                 p=s->packet;
 435                 p+=5;
 436                 n2s(p,csl);
 437                 n2s(p,sil);
 438                 n2s(p,cl);
 439                 d=(unsigned char *)s->init_buf->data;
 440                 if ((csl+sil+cl+11) != s->packet_length)
 441                         {
 442                         SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
 443                         goto err;
 444                         }
 445
 446                 /* record header: msg_type ... */
 447                 *(d++) = SSL3_MT_CLIENT_HELLO;
 448                 /* ... and length (actual value will be written later) */
 449                 d_len = d;
 450                 d += 3;
 451
 452                 /* client_version */
 453                 *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
 454                 *(d++) = v[1];
 455
 456                 /* lets populate the random area */
 457                 /* get the challenge_length */
 458                 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
 459                 memset(d,0,SSL3_RANDOM_SIZE);
 460                 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
 461                 d+=SSL3_RANDOM_SIZE;
 462
 463                 /* no session-id reuse */
 464                 *(d++)=0;
 465
 466                 /* ciphers */
 467                 j=0;
 468                 dd=d;
 469                 d+=2;
 470                 for (i=0; i<csl; i+=3)
 471                         {
 472                         if (p[i] != 0) continue;
 473                         *(d++)=p[i+1];
 474                         *(d++)=p[i+2];
 475                         j+=2;
 476                         }
 477                 s2n(j,dd);
 478
 479                 /* COMPRESSION */
 480                 *(d++)=1;
 481                 *(d++)=0;
 482
 483                 i = (d-(unsigned char *)s->init_buf->data) - 4;
 484                 l2n3((long)i, d_len);
 485
 486                 /* get the data reused from the init_buf */
 487                 s->s3->tmp.reuse_message=1;
 488                 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
 489                 s->s3->tmp.message_size=i;
 490                 }
 491
 492         /* imaginary new state (for program structure): */
 493         /* s->state = SSL23_SR_CLNT_HELLO_C */
 494
 495         if (type == 1)
 496                 {
 497 #ifdef OPENSSL_NO_SSL2
 498                 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
 499                 goto err;
 500 #else
 501                 /* we are talking sslv2 */
 502                 /* we need to clean up the SSLv3/TLSv1 setup and put in the
 503                  * sslv2 stuff. */
 504
 505                 if (s->s2 == NULL)
 506                         {
 507                         if (!ssl2_new(s))
 508                                 goto err;
 509                         }
 510                 else
 511                         ssl2_clear(s);
 512
 513                 if (s->s3 != NULL) ssl3_free(s);
 514
 515                 if (!BUF_MEM_grow_clean(s->init_buf,
 516                         SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
 517                         {
 518                         goto err;
 519                         }
 520
 521                 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
 522                 if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) ||
 523                         use_sslv2_strong ||
 524                         (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3))
 525                         s->s2->ssl2_rollback=0;
 526                 else
 527                         /* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0
 528                          * (SSL 3.0 draft/RFC 2246, App. E.2) */
 529                         s->s2->ssl2_rollback=1;
 530
 531                 /* setup the n bytes we have read so we get them from
 532                  * the sslv2 buffer */
 533                 s->rstate=SSL_ST_READ_HEADER;
 534                 s->packet_length=n;
 535                 s->packet= &(s->s2->rbuf[0]);
 536                 memcpy(s->packet,buf,n);
 537                 s->s2->rbuf_left=n;
 538                 s->s2->rbuf_offs=0;
 539
 540                 s->method=SSLv2_server_method();
 541                 s->handshake_func=s->method->ssl_accept;
 542 #endif
 543                 }
 544
 545         if ((type == 2) || (type == 3))
 546                 {
 547                 /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
 548
 549                 if (!ssl_init_wbio_buffer(s,1)) goto err;
 550
 551                 /* we are in this state */
 552                 s->state=SSL3_ST_SR_CLNT_HELLO_A;
 553
 554                 if (type == 3)
 555                         {
 556                         /* put the 'n' bytes we have read into the input buffer
 557                          * for SSLv3 */
 558                         s->rstate=SSL_ST_READ_HEADER;
 559                         s->packet_length=n;
 560                         s->packet= &(s->s3->rbuf.buf[0]);
 561                         memcpy(s->packet,buf,n);
 562                         s->s3->rbuf.left=n;
 563                         s->s3->rbuf.offset=0;
 564                         }
 565                 else
 566                         {
 567                         s->packet_length=0;
 568                         s->s3->rbuf.left=0;
 569                         s->s3->rbuf.offset=0;
 570                         }
 571
 572                 if (s->version == TLS1_VERSION)
 573                         s->method = TLSv1_server_method();
 574                 else
 575                         s->method = SSLv3_server_method();
 576 #if 0 /* ssl3_get_client_hello does this */
 577                 s->client_version=(v[0]<<8)|v[1];
 578 #endif
 579                 s->handshake_func=s->method->ssl_accept;
 580                 }
 581
 582         if ((type < 1) || (type > 3))
 583                 {
 584                 /* bad, very bad */
 585                 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
 586                 goto err;
 587                 }
 588         s->init_num=0;
 589
 590         if (buf != buf_space) OPENSSL_free(buf);
 591         s->first_packet=1;
 592         return(SSL_accept(s));
 593 err:
 594         if (buf != buf_space) OPENSSL_free(buf);
 595         return(-1);
 596         }