val_secalgo.h revision 269257 
1/*
2 * validator/val_secalgo.h - validator security algorithm functions.
3 *
4 * Copyright (c) 2012, NLnet Labs. All rights reserved.
5 *
6 * This software is open source.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * Neither the name of the NLNET LABS nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36/**
37 * \file
38 *
39 * This file contains helper functions for the validator module.
40 * The functions take buffers with raw data and convert to library calls.
41 */
42
43#ifndef VALIDATOR_VAL_SECALGO_H
44#define VALIDATOR_VAL_SECALGO_H
45struct sldns_buffer;
46
47/**
48 * Return size of DS digest according to its hash algorithm.
49 * @param algo: DS digest algo.
50 * @return size in bytes of digest, or 0 if not supported.
51 */
52size_t ds_digest_size_supported(int algo);
53
54/**
55 * @param algo: the DS digest algo
56 * @param buf: the buffer to digest
57 * @param len: length of buffer to digest.
58 * @param res: result stored here (must have sufficient space).
59 * @return false on failure.
60 */
61int secalgo_ds_digest(int algo, unsigned char* buf, size_t len,
62	unsigned char* res);
63
64/** return true if DNSKEY algorithm id is supported */
65int dnskey_algo_id_is_supported(int id);
66
67/**
68 * Check a canonical sig+rrset and signature against a dnskey
69 * @param buf: buffer with data to verify, the first rrsig part and the
70 *	canonicalized rrset.
71 * @param algo: DNSKEY algorithm.
72 * @param sigblock: signature rdata field from RRSIG
73 * @param sigblock_len: length of sigblock data.
74 * @param key: public key data from DNSKEY RR.
75 * @param keylen: length of keydata.
76 * @param reason: bogus reason in more detail.
77 * @return secure if verification succeeded, bogus on crypto failure,
78 *	unchecked on format errors and alloc failures.
79 */
80enum sec_status verify_canonrrset(struct sldns_buffer* buf, int algo,
81	unsigned char* sigblock, unsigned int sigblock_len,
82	unsigned char* key, unsigned int keylen, char** reason);
83
84#endif /* VALIDATOR_VAL_SECALGO_H */
85