ssl/d1_msg.c

   1 /* ssl/d1_msg.c */
   2 /*
   3  * DTLS implementation written by Nagendra Modadugu
   4  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1998-2015 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    openssl-core@openssl.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  60  * All rights reserved.
  61  *
  62  * This package is an SSL implementation written
  63  * by Eric Young (eay@cryptsoft.com).
  64  * The implementation was written so as to conform with Netscapes SSL.
  65  *
  66  * This library is free for commercial and non-commercial use as long as
  67  * the following conditions are aheared to.  The following conditions
  68  * apply to all code found in this distribution, be it the RC4, RSA,
  69  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  70  * included with this distribution is covered by the same copyright terms
  71  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  72  *
  73  * Copyright remains Eric Young's, and as such any Copyright notices in
  74  * the code are not to be removed.
  75  * If this package is used in a product, Eric Young should be given attribution
  76  * as the author of the parts of the library used.
  77  * This can be in the form of a textual message at program startup or
  78  * in documentation (online or textual) provided with the package.
  79  *
  80  * Redistribution and use in source and binary forms, with or without
  81  * modification, are permitted provided that the following conditions
  82  * are met:
  83  * 1. Redistributions of source code must retain the copyright
  84  *    notice, this list of conditions and the following disclaimer.
  85  * 2. Redistributions in binary form must reproduce the above copyright
  86  *    notice, this list of conditions and the following disclaimer in the
  87  *    documentation and/or other materials provided with the distribution.
  88  * 3. All advertising materials mentioning features or use of this software
  89  *    must display the following acknowledgement:
  90  *    "This product includes cryptographic software written by
  91  *     Eric Young (eay@cryptsoft.com)"
  92  *    The word 'cryptographic' can be left out if the rouines from the library
  93  *    being used are not cryptographic related :-).
  94  * 4. If you include any Windows specific code (or a derivative thereof) from
  95  *    the apps directory (application code) you must include an acknowledgement:
  96  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  97  *
  98  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  99  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 100  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 101  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 102  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 103  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 104  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 105  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 106  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 107  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 108  * SUCH DAMAGE.
 109  *
 110  * The licence and distribution terms for any publically available version or
 111  * derivative of this code cannot be changed.  i.e. this code cannot simply be
 112  * copied and put under another distribution licence
 113  * [including the GNU Public Licence.]
 114  */
 115
 116 #define USE_SOCKETS
 117 #include "ssl_locl.h"
 118
 119 int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, int len)
 120 {
 121     int i;
 122
 123 #ifndef OPENSSL_NO_SCTP
 124     /*
 125      * Check if we have to continue an interrupted handshake for reading
 126      * belated app data with SCTP.
 127      */
 128     if ((SSL_in_init(s) && !s->in_handshake) ||
 129         (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
 130          ossl_statem_in_sctp_read_sock(s)))
 131 #else
 132     if (SSL_in_init(s) && !s->in_handshake)
 133 #endif
 134     {
 135         i = s->handshake_func(s);
 136         if (i < 0)
 137             return (i);
 138         if (i == 0) {
 139             SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,
 140                    SSL_R_SSL_HANDSHAKE_FAILURE);
 141             return -1;
 142         }
 143     }
 144
 145     if (len > SSL3_RT_MAX_PLAIN_LENGTH) {
 146         SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES, SSL_R_DTLS_MESSAGE_TOO_BIG);
 147         return -1;
 148     }
 149
 150     i = dtls1_write_bytes(s, type, buf_, len);
 151     return i;
 152 }
 153
 154 int dtls1_dispatch_alert(SSL *s)
 155 {
 156     int i, j;
 157     void (*cb) (const SSL *ssl, int type, int val) = NULL;
 158     unsigned char buf[DTLS1_AL_HEADER_LENGTH];
 159     unsigned char *ptr = &buf[0];
 160
 161     s->s3->alert_dispatch = 0;
 162
 163     memset(buf, 0, sizeof(buf));
 164     *ptr++ = s->s3->send_alert[0];
 165     *ptr++ = s->s3->send_alert[1];
 166
 167 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
 168     if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) {
 169         s2n(s->d1->handshake_read_seq, ptr);
 170         l2n3(s->d1->r_msg_hdr.frag_off, ptr);
 171     }
 172 #endif
 173
 174     i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0);
 175     if (i <= 0) {
 176         s->s3->alert_dispatch = 1;
 177         /* fprintf( stderr, "not done with alert\n" ); */
 178     } else {
 179         if (s->s3->send_alert[0] == SSL3_AL_FATAL
 180 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
 181             || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
 182 #endif
 183             )
 184             (void)BIO_flush(s->wbio);
 185
 186         if (s->msg_callback)
 187             s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert,
 188                             2, s, s->msg_callback_arg);
 189
 190         if (s->info_callback != NULL)
 191             cb = s->info_callback;
 192         else if (s->ctx->info_callback != NULL)
 193             cb = s->ctx->info_callback;
 194
 195         if (cb != NULL) {
 196             j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1];
 197             cb(s, SSL_CB_WRITE_ALERT, j);
 198         }
 199     }
 200     return (i);
 201 }