ssl/d1_lib.c

   1 /* ssl/d1_lib.c */
   2 /*
   3  * DTLS implementation written by Nagendra Modadugu
   4  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999-2005 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
  60 #include <stdio.h>
  61 #include <openssl/objects.h>
  62 #include "ssl_locl.h"
  63
  64 const char *dtls1_version_str="DTLSv1" OPENSSL_VERSION_PTEXT;
  65
  66 static long dtls1_default_timeout(void);
  67
  68 static SSL3_ENC_METHOD DTLSv1_enc_data={
  69     dtls1_enc,
  70         tls1_mac,
  71         tls1_setup_key_block,
  72         tls1_generate_master_secret,
  73         tls1_change_cipher_state,
  74         tls1_final_finish_mac,
  75         TLS1_FINISH_MAC_LENGTH,
  76         tls1_cert_verify_mac,
  77         TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
  78         TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
  79         tls1_alert_code,
  80         };
  81
  82 static SSL_METHOD DTLSv1_data= {
  83         DTLS1_VERSION,
  84         dtls1_new,
  85         dtls1_clear,
  86         dtls1_free,
  87         ssl_undefined_function,
  88         ssl_undefined_function,
  89         ssl3_read,
  90         ssl3_peek,
  91         ssl3_write,
  92         ssl3_shutdown,
  93         ssl3_renegotiate,
  94         ssl3_renegotiate_check,
  95         dtls1_get_message,
  96         dtls1_read_bytes,
  97         dtls1_write_app_data_bytes,
  98         dtls1_dispatch_alert,
  99         ssl3_ctrl,
 100         ssl3_ctx_ctrl,
 101         ssl3_get_cipher_by_char,
 102         ssl3_put_cipher_by_char,
 103         ssl3_pending,
 104         ssl3_num_ciphers,
 105         ssl3_get_cipher,
 106         ssl_bad_method,
 107         dtls1_default_timeout,
 108         &DTLSv1_enc_data,
 109         ssl_undefined_void_function,
 110         ssl3_callback_ctrl,
 111         ssl3_ctx_callback_ctrl,
 112         };
 113
 114 static long dtls1_default_timeout(void)
 115         {
 116         /* 2 hours, the 24 hours mentioned in the DTLSv1 spec
 117          * is way too long for http, the cache would over fill */
 118         return(60*60*2);
 119         }
 120
 121 SSL_METHOD *dtlsv1_base_method(void)
 122         {
 123         return(&DTLSv1_data);
 124         }
 125
 126 int dtls1_new(SSL *s)
 127         {
 128         DTLS1_STATE *d1;
 129
 130         if (!ssl3_new(s)) return(0);
 131         if ((d1=OPENSSL_malloc(sizeof *d1)) == NULL) return (0);
 132         memset(d1,0, sizeof *d1);
 133
 134         /* d1->handshake_epoch=0; */
 135         d1->bitmap.length=sizeof(d1->bitmap.map) * 8;
 136         d1->unprocessed_rcds.q=pqueue_new();
 137     d1->processed_rcds.q=pqueue_new();
 138     d1->buffered_messages = pqueue_new();
 139         d1->sent_messages=pqueue_new();
 140
 141         if ( s->server)
 142                 {
 143                 d1->cookie_len = sizeof(s->d1->cookie);
 144                 }
 145
 146         if( ! d1->unprocessed_rcds.q || ! d1->processed_rcds.q
 147         || ! d1->buffered_messages || ! d1->sent_messages)
 148                 {
 149         if ( d1->unprocessed_rcds.q) pqueue_free(d1->unprocessed_rcds.q);
 150         if ( d1->processed_rcds.q) pqueue_free(d1->processed_rcds.q);
 151         if ( d1->buffered_messages) pqueue_free(d1->buffered_messages);
 152                 if ( d1->sent_messages) pqueue_free(d1->sent_messages);
 153                 OPENSSL_free(d1);
 154                 return (0);
 155                 }
 156
 157         s->d1=d1;
 158         s->method->ssl_clear(s);
 159         return(1);
 160         }
 161
 162 void dtls1_free(SSL *s)
 163         {
 164     pitem *item = NULL;
 165     hm_fragment *frag = NULL;
 166
 167         ssl3_free(s);
 168
 169     while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL)
 170         {
 171         OPENSSL_free(item->data);
 172         pitem_free(item);
 173         }
 174     pqueue_free(s->d1->unprocessed_rcds.q);
 175
 176     while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL)
 177         {
 178         OPENSSL_free(item->data);
 179         pitem_free(item);
 180         }
 181     pqueue_free(s->d1->processed_rcds.q);
 182
 183     while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL)
 184         {
 185         frag = (hm_fragment *)item->data;
 186         OPENSSL_free(frag->fragment);
 187         OPENSSL_free(frag);
 188         pitem_free(item);
 189         }
 190     pqueue_free(s->d1->buffered_messages);
 191
 192     while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL)
 193         {
 194         frag = (hm_fragment *)item->data;
 195         OPENSSL_free(frag->fragment);
 196         OPENSSL_free(frag);
 197         pitem_free(item);
 198         }
 199         pqueue_free(s->d1->sent_messages);
 200
 201         OPENSSL_free(s->d1);
 202         }
 203
 204 void dtls1_clear(SSL *s)
 205         {
 206         ssl3_clear(s);
 207         s->version=DTLS1_VERSION;
 208         }