ssl/s23_clnt.c

   1 /* ssl/s23_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) 1998-2006 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 const SSL_METHOD *ssl23_get_client_method(int ver);
 120 static int ssl23_client_hello(SSL *s);
 121 static int ssl23_get_server_hello(SSL *s);
 122 static const SSL_METHOD *ssl23_get_client_method(int ver)
 123         {
 124 #ifndef OPENSSL_NO_SSL3
 125         if (ver == SSL3_VERSION)
 126                 return(SSLv3_client_method());
 127 #endif
 128         if (ver == TLS1_VERSION)
 129                 return(TLSv1_client_method());
 130         else if (ver == TLS1_1_VERSION)
 131                 return(TLSv1_1_client_method());
 132         else if (ver == TLS1_2_VERSION)
 133                 return(TLSv1_2_client_method());
 134         else
 135                 return(NULL);
 136         }
 137
 138 IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
 139                         ssl_undefined_function,
 140                         ssl23_connect,
 141                         ssl23_get_client_method)
 142
 143 int ssl23_connect(SSL *s)
 144         {
 145         BUF_MEM *buf=NULL;
 146         unsigned long Time=(unsigned long)time(NULL);
 147         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 148         int ret= -1;
 149         int new_state,state;
 150
 151         RAND_add(&Time,sizeof(Time),0);
 152         ERR_clear_error();
 153         clear_sys_error();
 154
 155         if (s->info_callback != NULL)
 156                 cb=s->info_callback;
 157         else if (s->ctx->info_callback != NULL)
 158                 cb=s->ctx->info_callback;
 159
 160         s->in_handshake++;
 161         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 162
 163         for (;;)
 164                 {
 165                 state=s->state;
 166
 167                 switch(s->state)
 168                         {
 169                 case SSL_ST_BEFORE:
 170                 case SSL_ST_CONNECT:
 171                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 172                 case SSL_ST_OK|SSL_ST_CONNECT:
 173
 174                         if (s->session != NULL)
 175                                 {
 176                                 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
 177                                 ret= -1;
 178                                 goto end;
 179                                 }
 180                         s->server=0;
 181                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 182
 183                         /* s->version=TLS1_VERSION; */
 184                         s->type=SSL_ST_CONNECT;
 185
 186                         if (s->init_buf == NULL)
 187                                 {
 188                                 if ((buf=BUF_MEM_new()) == NULL)
 189                                         {
 190                                         ret= -1;
 191                                         goto end;
 192                                         }
 193                                 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
 194                                         {
 195                                         ret= -1;
 196                                         goto end;
 197                                         }
 198                                 s->init_buf=buf;
 199                                 buf=NULL;
 200                                 }
 201
 202                         if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
 203
 204                         ssl3_init_finished_mac(s);
 205
 206                         s->state=SSL23_ST_CW_CLNT_HELLO_A;
 207                         s->ctx->stats.sess_connect++;
 208                         s->init_num=0;
 209                         break;
 210
 211                 case SSL23_ST_CW_CLNT_HELLO_A:
 212                 case SSL23_ST_CW_CLNT_HELLO_B:
 213
 214                         s->shutdown=0;
 215                         ret=ssl23_client_hello(s);
 216                         if (ret <= 0) goto end;
 217                         s->state=SSL23_ST_CR_SRVR_HELLO_A;
 218                         s->init_num=0;
 219
 220                         break;
 221
 222                 case SSL23_ST_CR_SRVR_HELLO_A:
 223                 case SSL23_ST_CR_SRVR_HELLO_B:
 224                         ret=ssl23_get_server_hello(s);
 225                         if (ret >= 0) cb=NULL;
 226                         goto end;
 227                         /* break; */
 228
 229                 default:
 230                         SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
 231                         ret= -1;
 232                         goto end;
 233                         /* break; */
 234                         }
 235
 236                 if (s->debug) { (void)BIO_flush(s->wbio); }
 237
 238                 if ((cb != NULL) && (s->state != state))
 239                         {
 240                         new_state=s->state;
 241                         s->state=state;
 242                         cb(s,SSL_CB_CONNECT_LOOP,1);
 243                         s->state=new_state;
 244                         }
 245                 }
 246 end:
 247         s->in_handshake--;
 248         if (buf != NULL)
 249                 BUF_MEM_free(buf);
 250         if (cb != NULL)
 251                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 252         return(ret);
 253         }
 254
 255 /* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0
 256  * on failure, 1 on success. */
 257 int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len)
 258         {
 259                 int send_time = 0;
 260                 if (len < 4)
 261                         return 0;
 262                 if (server)
 263                         send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0;
 264                 else
 265                         send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0;
 266                 if (send_time)
 267                         {
 268                         unsigned long Time = (unsigned long)time(NULL);
 269                         unsigned char *p = result;
 270                         l2n(Time, p);
 271                         return RAND_pseudo_bytes(p, len-4);
 272                         }
 273                 else
 274                         return RAND_pseudo_bytes(result, len);
 275         }
 276
 277 static int ssl23_client_hello(SSL *s)
 278         {
 279         unsigned char *buf;
 280         unsigned char *p,*d;
 281         int i;
 282         unsigned long l;
 283         int version = 0, version_major, version_minor;
 284         int al = 0;
 285 #ifndef OPENSSL_NO_COMP
 286         int j;
 287         SSL_COMP *comp;
 288 #endif
 289         int ret;
 290         unsigned long mask, options = s->options;
 291
 292         /*
 293          * SSL_OP_NO_X disables all protocols above X *if* there are
 294          * some protocols below X enabled. This is required in order
 295          * to maintain "version capability" vector contiguous. So
 296          * that if application wants to disable TLS1.0 in favour of
 297          * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
 298          * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
 299          */
 300         mask =  SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1
 301 #if !defined(OPENSSL_NO_SSL3)
 302                 |SSL_OP_NO_SSLv3
 303 #endif
 304                 ;
 305 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
 306         version = TLS1_2_VERSION;
 307
 308         if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
 309                 version = TLS1_1_VERSION;
 310 #else
 311         version = TLS1_1_VERSION;
 312 #endif
 313         mask &= ~SSL_OP_NO_TLSv1_1;
 314         if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
 315                 version = TLS1_VERSION;
 316         mask &= ~SSL_OP_NO_TLSv1;
 317 #if !defined(OPENSSL_NO_SSL3)
 318         if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
 319                 version = SSL3_VERSION;
 320         mask &= ~SSL_OP_NO_SSLv3;
 321 #endif
 322
 323         buf=(unsigned char *)s->init_buf->data;
 324         if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
 325                 {
 326 #if 0
 327                 /* don't reuse session-id's */
 328                 if (!ssl_get_new_session(s,0))
 329                         {
 330                         return(-1);
 331                         }
 332 #endif
 333
 334                 p=s->s3->client_random;
 335                 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
 336                         return -1;
 337
 338                 if (version == TLS1_2_VERSION)
 339                         {
 340                         version_major = TLS1_2_VERSION_MAJOR;
 341                         version_minor = TLS1_2_VERSION_MINOR;
 342                         }
 343                 else if (tls1_suiteb(s))
 344                         {
 345                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,
 346                                         SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
 347                         return -1;
 348                         }
 349                 else if (version == TLS1_1_VERSION)
 350                         {
 351                         version_major = TLS1_1_VERSION_MAJOR;
 352                         version_minor = TLS1_1_VERSION_MINOR;
 353                         }
 354                 else if (version == TLS1_VERSION)
 355                         {
 356                         version_major = TLS1_VERSION_MAJOR;
 357                         version_minor = TLS1_VERSION_MINOR;
 358                         }
 359 #ifdef OPENSSL_FIPS
 360                 else if(FIPS_mode())
 361                         {
 362                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,
 363                                         SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
 364                         return -1;
 365                         }
 366 #endif
 367                 else if (version == SSL3_VERSION)
 368                         {
 369                         version_major = SSL3_VERSION_MAJOR;
 370                         version_minor = SSL3_VERSION_MINOR;
 371                         }
 372                 else
 373                         {
 374                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
 375                         return(-1);
 376                         }
 377
 378                 s->client_version = version;
 379
 380                 /* create Client Hello in SSL 3.0/TLS 1.0 format */
 381
 382                 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
 383                 d = p = &(buf[9]);
 384
 385                 *(p++) = version_major;
 386                 *(p++) = version_minor;
 387
 388                 /* Random stuff */
 389                 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
 390                 p += SSL3_RANDOM_SIZE;
 391
 392                 /* Session ID (zero since there is no reuse) */
 393                 *(p++) = 0;
 394
 395                 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
 396                 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
 397                 if (i == 0)
 398                         {
 399                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 400                         return -1;
 401                         }
 402 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
 403                 /* Some servers hang if client hello > 256 bytes
 404                  * as hack workaround chop number of supported ciphers
 405                  * to keep it well below this if we use TLS v1.2
 406                  */
 407                 if (TLS1_get_version(s) >= TLS1_2_VERSION
 408                         && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
 409                         i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
 410 #endif
 411                 s2n(i,p);
 412                 p+=i;
 413
 414                 /* COMPRESSION */
 415 #ifdef OPENSSL_NO_COMP
 416                 *(p++)=1;
 417 #else
 418                 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
 419                         j=0;
 420                 else
 421                         j=sk_SSL_COMP_num(s->ctx->comp_methods);
 422                 *(p++)=1+j;
 423                 for (i=0; i<j; i++)
 424                         {
 425                         comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 426                         *(p++)=comp->id;
 427                         }
 428 #endif
 429                 *(p++)=0; /* Add the NULL method */
 430
 431 #ifndef OPENSSL_NO_TLSEXT
 432                 /* TLS extensions*/
 433                 if (ssl_prepare_clienthello_tlsext(s) <= 0)
 434                         {
 435                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
 436                         return -1;
 437                         }
 438                 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
 439                         {
 440                         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 441                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
 442                         return -1;
 443                         }
 444 #endif
 445
 446                 l = p-d;
 447
 448                 /* fill in 4-byte handshake header */
 449                 d=&(buf[5]);
 450                 *(d++)=SSL3_MT_CLIENT_HELLO;
 451                 l2n3(l,d);
 452
 453                 l += 4;
 454
 455                 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
 456                         {
 457                         SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
 458                         return -1;
 459                         }
 460
 461                 /* fill in 5-byte record header */
 462                 d=buf;
 463                 *(d++) = SSL3_RT_HANDSHAKE;
 464                 *(d++) = version_major;
 465                 /* Some servers hang if we use long client hellos
 466                  * and a record number > TLS 1.0.
 467                  */
 468                 if (TLS1_get_client_version(s) > TLS1_VERSION)
 469                         *(d++) = 1;
 470                 else
 471                         *(d++) = version_minor;
 472                 s2n((int)l,d);
 473
 474                 /* number of bytes to write */
 475                 s->init_num=p-buf;
 476                 s->init_off=0;
 477
 478                 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
 479
 480                 s->state=SSL23_ST_CW_CLNT_HELLO_B;
 481                 s->init_off=0;
 482                 }
 483
 484         /* SSL3_ST_CW_CLNT_HELLO_B */
 485         ret = ssl23_write_bytes(s);
 486
 487         if ((ret >= 2) && s->msg_callback)
 488                 {
 489                 /* Client Hello has been sent; tell msg_callback */
 490                 s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg);
 491                 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
 492                 }
 493
 494         return ret;
 495         }
 496
 497 static int ssl23_get_server_hello(SSL *s)
 498         {
 499         char buf[8];
 500         unsigned char *p;
 501         int i;
 502         int n;
 503
 504         n=ssl23_read_bytes(s,7);
 505
 506         if (n != 7) return(n);
 507         p=s->packet;
 508
 509         memcpy(buf,p,n);
 510
 511         if (p[1] == SSL3_VERSION_MAJOR &&
 512                  p[2] <= TLS1_2_VERSION_MINOR &&
 513                  ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
 514                   (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
 515                 {
 516                 /* we have sslv3 or tls1 (server hello or alert) */
 517
 518 #ifndef OPENSSL_NO_SSL3
 519                 if ((p[2] == SSL3_VERSION_MINOR) &&
 520                         !(s->options & SSL_OP_NO_SSLv3))
 521                         {
 522 #ifdef OPENSSL_FIPS
 523                         if(FIPS_mode())
 524                                 {
 525                                 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
 526                                         SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
 527                                 goto err;
 528                                 }
 529 #endif
 530                         s->version=SSL3_VERSION;
 531                         s->method=SSLv3_client_method();
 532                         }
 533                 else
 534 #endif
 535                 if ((p[2] == TLS1_VERSION_MINOR) &&
 536                         !(s->options & SSL_OP_NO_TLSv1))
 537                         {
 538                         s->version=TLS1_VERSION;
 539                         s->method=TLSv1_client_method();
 540                         }
 541                 else if ((p[2] == TLS1_1_VERSION_MINOR) &&
 542                         !(s->options & SSL_OP_NO_TLSv1_1))
 543                         {
 544                         s->version=TLS1_1_VERSION;
 545                         s->method=TLSv1_1_client_method();
 546                         }
 547                 else if ((p[2] == TLS1_2_VERSION_MINOR) &&
 548                         !(s->options & SSL_OP_NO_TLSv1_2))
 549                         {
 550                         s->version=TLS1_2_VERSION;
 551                         s->method=TLSv1_2_client_method();
 552                         }
 553                 else
 554                         {
 555                         SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
 556                         goto err;
 557                         }
 558
 559                 /* ensure that TLS_MAX_VERSION is up-to-date */
 560                 OPENSSL_assert(s->version <= TLS_MAX_VERSION);
 561
 562                 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
 563                         {
 564                         SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW);
 565                         goto err;
 566                         }
 567
 568                 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
 569                         {
 570                         /* fatal alert */
 571
 572                         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 573                         int j;
 574
 575                         if (s->info_callback != NULL)
 576                                 cb=s->info_callback;
 577                         else if (s->ctx->info_callback != NULL)
 578                                 cb=s->ctx->info_callback;
 579
 580                         i=p[5];
 581                         if (cb != NULL)
 582                                 {
 583                                 j=(i<<8)|p[6];
 584                                 cb(s,SSL_CB_READ_ALERT,j);
 585                                 }
 586
 587                         if (s->msg_callback)
 588                                 {
 589                                 s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg);
 590                                 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
 591                                 }
 592
 593                         s->rwstate=SSL_NOTHING;
 594                         SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
 595                         goto err;
 596                         }
 597
 598                 if (!ssl_init_wbio_buffer(s,1)) goto err;
 599
 600                 /* we are in this state */
 601                 s->state=SSL3_ST_CR_SRVR_HELLO_A;
 602
 603                 /* put the 7 bytes we have read into the input buffer
 604                  * for SSLv3 */
 605                 s->rstate=SSL_ST_READ_HEADER;
 606                 s->packet_length=n;
 607                 if (s->s3->rbuf.buf == NULL)
 608                         if (!ssl3_setup_read_buffer(s))
 609                                 goto err;
 610                 s->packet= &(s->s3->rbuf.buf[0]);
 611                 memcpy(s->packet,buf,n);
 612                 s->s3->rbuf.left=n;
 613                 s->s3->rbuf.offset=0;
 614
 615                 s->handshake_func=s->method->ssl_connect;
 616                 }
 617         else
 618                 {
 619                 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
 620                 goto err;
 621                 }
 622         s->init_num=0;
 623
 624         /* Since, if we are sending a ssl23 client hello, we are not
 625          * reusing a session-id */
 626         if (!ssl_get_new_session(s,0))
 627                 goto err;
 628
 629         return(SSL_connect(s));
 630 err:
 631         return(-1);
 632         }