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 45 struct sldns_buffer; 46 47 /** Return size of nsec3 hash algorithm, 0 if not supported */ 48 size_t nsec3_hash_algo_size_supported(int id); 49 50 /** 51 * Hash a single hash call of an NSEC3 hash algorithm. 52 * Iterations and salt are done by the caller. 53 * @param algo: nsec3 hash algorithm. 54 * @param buf: the buffer to digest 55 * @param len: length of buffer to digest. 56 * @param res: result stored here (must have sufficient space). 57 * @return false on failure. 58 */ 59 int secalgo_nsec3_hash(int algo, unsigned char* buf, size_t len, 60 unsigned char* res); 61 62 /** 63 * Return size of DS digest according to its hash algorithm. 64 * @param algo: DS digest algo. 65 * @return size in bytes of digest, or 0 if not supported. 66 */ 67 size_t ds_digest_size_supported(int algo); 68 69 /** 70 * @param algo: the DS digest algo 71 * @param buf: the buffer to digest 72 * @param len: length of buffer to digest. 73 * @param res: result stored here (must have sufficient space). 74 * @return false on failure. 75 */ 76 int secalgo_ds_digest(int algo, unsigned char* buf, size_t len, 77 unsigned char* res); 78 79 /** return true if DNSKEY algorithm id is supported */ 80 int dnskey_algo_id_is_supported(int id); 81 82 /** 83 * Check a canonical sig+rrset and signature against a dnskey 84 * @param buf: buffer with data to verify, the first rrsig part and the 85 * canonicalized rrset. 86 * @param algo: DNSKEY algorithm. 87 * @param sigblock: signature rdata field from RRSIG 88 * @param sigblock_len: length of sigblock data. 89 * @param key: public key data from DNSKEY RR. 90 * @param keylen: length of keydata. 91 * @param reason: bogus reason in more detail. 92 * @return secure if verification succeeded, bogus on crypto failure, 93 * unchecked on format errors and alloc failures. 94 */ 95 enum sec_status verify_canonrrset(struct sldns_buffer* buf, int algo, 96 unsigned char* sigblock, unsigned int sigblock_len, 97 unsigned char* key, unsigned int keylen, char** reason); 98 99 #endif /* VALIDATOR_VAL_SECALGO_H */ 100