crypto/external/bsd/openssl/dist/ssl/t1_reneg.c

   1 /* ssl/t1_reneg.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) 1998-2009 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 #include <stdio.h>
 112 #include <openssl/objects.h>
 113 #include "ssl_locl.h"
 114
 115 /* Add the client's renegotiation binding */
 116 int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
 117                                         int maxlen)
 118     {
 119     if(p)
 120         {
 121         if((s->s3->previous_client_finished_len+1) > maxlen)
 122             {
 123             SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATE_EXT_TOO_LONG);
 124             return 0;
 125             }
 126
 127         /* Length byte */
 128         *p = s->s3->previous_client_finished_len;
 129         p++;
 130
 131         memcpy(p, s->s3->previous_client_finished,
 132                s->s3->previous_client_finished_len);
 133 #ifdef OPENSSL_RI_DEBUG
 134     fprintf(stderr, "RI extension sent by client\n");
 135 #endif
 136         }
 137
 138     *len=s->s3->previous_client_finished_len + 1;
 139
 140
 141     return 1;
 142     }
 143
 144 /* Parse the client's renegotiation binding and abort if it's not
 145    right */
 146 int ssl_parse_clienthello_renegotiate_ext(SSL *s, unsigned char *d, int len,
 147                                           int *al)
 148     {
 149     int ilen;
 150
 151     /* Parse the length byte */
 152     if(len < 1)
 153         {
 154         SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
 155         *al=SSL_AD_ILLEGAL_PARAMETER;
 156         return 0;
 157         }
 158     ilen = *d;
 159     d++;
 160
 161     /* Consistency check */
 162     if((ilen+1) != len)
 163         {
 164         SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
 165         *al=SSL_AD_ILLEGAL_PARAMETER;
 166         return 0;
 167         }
 168
 169     /* Check that the extension matches */
 170     if(ilen != s->s3->previous_client_finished_len)
 171         {
 172         SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
 173         *al=SSL_AD_HANDSHAKE_FAILURE;
 174         return 0;
 175         }
 176
 177     if(memcmp(d, s->s3->previous_client_finished,
 178               s->s3->previous_client_finished_len))
 179         {
 180         SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
 181         *al=SSL_AD_HANDSHAKE_FAILURE;
 182         return 0;
 183         }
 184 #ifdef OPENSSL_RI_DEBUG
 185     fprintf(stderr, "RI extension received by server\n");
 186 #endif
 187
 188     s->s3->send_connection_binding=1;
 189
 190     return 1;
 191     }
 192
 193 /* Add the server's renegotiation binding */
 194 int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
 195                                         int maxlen)
 196     {
 197     if(p)
 198         {
 199         if((s->s3->previous_client_finished_len +
 200             s->s3->previous_server_finished_len + 1) > maxlen)
 201             {
 202             SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATE_EXT_TOO_LONG);
 203             return 0;
 204             }
 205
 206         /* Length byte */
 207         *p = s->s3->previous_client_finished_len + s->s3->previous_server_finished_len;
 208         p++;
 209
 210         memcpy(p, s->s3->previous_client_finished,
 211                s->s3->previous_client_finished_len);
 212         p += s->s3->previous_client_finished_len;
 213
 214         memcpy(p, s->s3->previous_server_finished,
 215                s->s3->previous_server_finished_len);
 216 #ifdef OPENSSL_RI_DEBUG
 217     fprintf(stderr, "RI extension sent by server\n");
 218 #endif
 219         }
 220
 221     *len=s->s3->previous_client_finished_len
 222         + s->s3->previous_server_finished_len + 1;
 223
 224     return 1;
 225     }
 226
 227 /* Parse the server's renegotiation binding and abort if it's not
 228    right */
 229 int ssl_parse_serverhello_renegotiate_ext(SSL *s, unsigned char *d, int len,
 230                                           int *al)
 231     {
 232     int expected_len=s->s3->previous_client_finished_len
 233         + s->s3->previous_server_finished_len;
 234     int ilen;
 235
 236     /* Check for logic errors */
 237     OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
 238     OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
 239
 240     /* Parse the length byte */
 241     if(len < 1)
 242         {
 243         SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
 244         *al=SSL_AD_ILLEGAL_PARAMETER;
 245         return 0;
 246         }
 247     ilen = *d;
 248     d++;
 249
 250     /* Consistency check */
 251     if(ilen+1 != len)
 252         {
 253         SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
 254         *al=SSL_AD_ILLEGAL_PARAMETER;
 255         return 0;
 256         }
 257
 258     /* Check that the extension matches */
 259     if(ilen != expected_len)
 260         {
 261         SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
 262         *al=SSL_AD_HANDSHAKE_FAILURE;
 263         return 0;
 264         }
 265
 266     if(memcmp(d, s->s3->previous_client_finished,
 267               s->s3->previous_client_finished_len))
 268         {
 269         SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
 270         *al=SSL_AD_HANDSHAKE_FAILURE;
 271         return 0;
 272         }
 273     d += s->s3->previous_client_finished_len;
 274
 275     if(memcmp(d, s->s3->previous_server_finished,
 276               s->s3->previous_server_finished_len))
 277         {
 278         SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
 279         *al=SSL_AD_ILLEGAL_PARAMETER;
 280         return 0;
 281         }
 282 #ifdef OPENSSL_RI_DEBUG
 283     fprintf(stderr, "RI extension received by client\n");
 284 #endif
 285     s->s3->send_connection_binding=1;
 286
 287     return 1;
 288     }