1/*
2 * Copyright (C) 2004-2007, 2010  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2002  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: ds.h,v 1.12 2010/12/23 23:47:08 tbox Exp $ */
19
20#ifndef DNS_DS_H
21#define DNS_DS_H 1
22
23#include <isc/lang.h>
24
25#include <dns/types.h>
26
27#define DNS_DSDIGEST_SHA1 (1)
28#define DNS_DSDIGEST_SHA256 (2)
29#define DNS_DSDIGEST_GOST (3)
30
31/* should not be here... */
32
33#define ISC_GOST_DIGESTLENGTH 32U
34
35/*
36 * Assuming SHA-256 digest type.
37 */
38#define DNS_DS_BUFFERSIZE (36)
39
40ISC_LANG_BEGINDECLS
41
42isc_result_t
43dns_ds_buildrdata(dns_name_t *owner, dns_rdata_t *key,
44		  unsigned int digest_type, unsigned char *buffer,
45		  dns_rdata_t *rdata);
46/*%<
47 * Build the rdata of a DS record.
48 *
49 * Requires:
50 *\li	key	Points to a valid DNS KEY record.
51 *\li	buffer	Points to a temporary buffer of at least
52 * 		#DNS_DS_BUFFERSIZE bytes.
53 *\li	rdata	Points to an initialized dns_rdata_t.
54 *
55 * Ensures:
56 *  \li    *rdata	Contains a valid DS rdata.  The 'data' member refers
57 *		to 'buffer'.
58 */
59
60isc_boolean_t
61dns_ds_digest_supported(unsigned int digest_type);
62/*%<
63 * Is this digest algorithm supported by dns_ds_buildrdata()?
64 */
65
66ISC_LANG_ENDDECLS
67
68#endif /* DNS_DS_H */
69