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 LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * 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 45 46 /** 47 * Return size of DS digest according to its hash algorithm. 48 * @param algo: DS digest algo. 49 * @return size in bytes of digest, or 0 if not supported. 50 */ 51 size_t ds_digest_size_supported(int algo); 52 53 /** 54 * @param algo: the DS digest algo 55 * @param buf: the buffer to digest 56 * @param len: length of buffer to digest. 57 * @param res: result stored here (must have sufficient space). 58 * @return false on failure. 59 */ 60 int secalgo_ds_digest(int algo, unsigned char* buf, size_t len, 61 unsigned char* res); 62 63 /** return true if DNSKEY algorithm id is supported */ 64 int dnskey_algo_id_is_supported(int id); 65 66 /** 67 * Check a canonical sig+rrset and signature against a dnskey 68 * @param buf: buffer with data to verify, the first rrsig part and the 69 * canonicalized rrset. 70 * @param algo: DNSKEY algorithm. 71 * @param sigblock: signature rdata field from RRSIG 72 * @param sigblock_len: length of sigblock data. 73 * @param key: public key data from DNSKEY RR. 74 * @param keylen: length of keydata. 75 * @param reason: bogus reason in more detail. 76 * @return secure if verification succeeded, bogus on crypto failure, 77 * unchecked on format errors and alloc failures. 78 */ 79 enum sec_status verify_canonrrset(ldns_buffer* buf, int algo, 80 unsigned char* sigblock, unsigned int sigblock_len, 81 unsigned char* key, unsigned int keylen, char** reason); 82 83 #endif /* VALIDATOR_VAL_SECALGO_H */ 84