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
64const char dtls1_version_str[]="DTLSv1" OPENSSL_VERSION_PTEXT;
65
66SSL3_ENC_METHOD DTLSv1_enc_data={
67    dtls1_enc,
68	tls1_mac,
69	tls1_setup_key_block,
70	tls1_generate_master_secret,
71	tls1_change_cipher_state,
72	tls1_final_finish_mac,
73	TLS1_FINISH_MAC_LENGTH,
74	tls1_cert_verify_mac,
75	TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
76	TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
77	tls1_alert_code,
78	};
79
80long dtls1_default_timeout(void)
81	{
82	/* 2 hours, the 24 hours mentioned in the DTLSv1 spec
83	 * is way too long for http, the cache would over fill */
84	return(60*60*2);
85	}
86
87IMPLEMENT_dtls1_meth_func(dtlsv1_base_method,
88			ssl_undefined_function,
89			ssl_undefined_function,
90			ssl_bad_method)
91
92int dtls1_new(SSL *s)
93	{
94	DTLS1_STATE *d1;
95
96	if (!ssl3_new(s)) return(0);
97	if ((d1=OPENSSL_malloc(sizeof *d1)) == NULL) return (0);
98	memset(d1,0, sizeof *d1);
99
100	/* d1->handshake_epoch=0; */
101#if defined(OPENSSL_SYS_VMS) || defined(VMS_TEST)
102	d1->bitmap.length=64;
103#else
104	d1->bitmap.length=sizeof(d1->bitmap.map) * 8;
105#endif
106	pq_64bit_init(&(d1->bitmap.map));
107	pq_64bit_init(&(d1->bitmap.max_seq_num));
108
109	pq_64bit_init(&(d1->next_bitmap.map));
110	pq_64bit_init(&(d1->next_bitmap.max_seq_num));
111
112	d1->unprocessed_rcds.q=pqueue_new();
113	d1->processed_rcds.q=pqueue_new();
114	d1->buffered_messages = pqueue_new();
115	d1->sent_messages=pqueue_new();
116
117	if ( s->server)
118		{
119		d1->cookie_len = sizeof(s->d1->cookie);
120		}
121
122	if( ! d1->unprocessed_rcds.q || ! d1->processed_rcds.q
123        || ! d1->buffered_messages || ! d1->sent_messages)
124		{
125        if ( d1->unprocessed_rcds.q) pqueue_free(d1->unprocessed_rcds.q);
126        if ( d1->processed_rcds.q) pqueue_free(d1->processed_rcds.q);
127        if ( d1->buffered_messages) pqueue_free(d1->buffered_messages);
128		if ( d1->sent_messages) pqueue_free(d1->sent_messages);
129		OPENSSL_free(d1);
130		return (0);
131		}
132
133	s->d1=d1;
134	s->method->ssl_clear(s);
135	return(1);
136	}
137
138void dtls1_free(SSL *s)
139	{
140    pitem *item = NULL;
141    hm_fragment *frag = NULL;
142
143	ssl3_free(s);
144
145    while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL)
146        {
147        OPENSSL_free(item->data);
148        pitem_free(item);
149        }
150    pqueue_free(s->d1->unprocessed_rcds.q);
151
152    while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL)
153        {
154        OPENSSL_free(item->data);
155        pitem_free(item);
156        }
157    pqueue_free(s->d1->processed_rcds.q);
158
159    while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL)
160        {
161        frag = (hm_fragment *)item->data;
162        OPENSSL_free(frag->fragment);
163        OPENSSL_free(frag);
164        pitem_free(item);
165        }
166    pqueue_free(s->d1->buffered_messages);
167
168    while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL)
169        {
170        frag = (hm_fragment *)item->data;
171        OPENSSL_free(frag->fragment);
172        OPENSSL_free(frag);
173        pitem_free(item);
174        }
175	pqueue_free(s->d1->sent_messages);
176
177	pq_64bit_free(&(s->d1->bitmap.map));
178	pq_64bit_free(&(s->d1->bitmap.max_seq_num));
179
180	pq_64bit_free(&(s->d1->next_bitmap.map));
181	pq_64bit_free(&(s->d1->next_bitmap.max_seq_num));
182
183	OPENSSL_free(s->d1);
184	}
185
186void dtls1_clear(SSL *s)
187	{
188	ssl3_clear(s);
189	s->version=DTLS1_VERSION;
190	}
191