108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
/*
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* validator/val_secalgo.h - validator security algorithm functions.
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*
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* Copyright (c) 2012, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains helper functions for the validator module.
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* The functions take buffers with raw data and convert to library calls.
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*/
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#ifndef VALIDATOR_VAL_SECALGO_H
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#define VALIDATOR_VAL_SECALGO_H
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struct sldns_buffer;
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/** Return size of nsec3 hash algorithm, 0 if not supported */
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size_t nsec3_hash_algo_size_supported(int id);
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/**
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* Hash a single hash call of an NSEC3 hash algorithm.
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* Iterations and salt are done by the caller.
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* @param algo: nsec3 hash algorithm.
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* @param buf: the buffer to digest
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* @param len: length of buffer to digest.
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* @param res: result stored here (must have sufficient space).
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* @return false on failure.
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*/
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int secalgo_nsec3_hash(int algo, unsigned char* buf, size_t len,
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unsigned char* res);
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/**
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* Calculate the sha256 hash for the data buffer into the result.
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* @param buf: buffer to digest.
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* @param len: length of the buffer to digest.
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* @param res: result is stored here (space 256/8 bytes).
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*/
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void secalgo_hash_sha256(unsigned char* buf, size_t len, unsigned char* res);
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/**
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* Return size of DS digest according to its hash algorithm.
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* @param algo: DS digest algo.
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* @return size in bytes of digest, or 0 if not supported.
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*/
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size_t ds_digest_size_supported(int algo);
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/**
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* @param algo: the DS digest algo
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* @param buf: the buffer to digest
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* @param len: length of buffer to digest.
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* @param res: result stored here (must have sufficient space).
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* @return false on failure.
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*/
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int secalgo_ds_digest(int algo, unsigned char* buf, size_t len,
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unsigned char* res);
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/** return true if DNSKEY algorithm id is supported */
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int dnskey_algo_id_is_supported(int id);
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/**
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* Check a canonical sig+rrset and signature against a dnskey
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* @param buf: buffer with data to verify, the first rrsig part and the
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* canonicalized rrset.
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* @param algo: DNSKEY algorithm.
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* @param sigblock: signature rdata field from RRSIG
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* @param sigblock_len: length of sigblock data.
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* @param key: public key data from DNSKEY RR.
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* @param keylen: length of keydata.
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* @param reason: bogus reason in more detail.
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* @return secure if verification succeeded, bogus on crypto failure,
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* unchecked on format errors and alloc failures.
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*/
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enum sec_status verify_canonrrset(struct sldns_buffer* buf, int algo,
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unsigned char* sigblock, unsigned int sigblock_len,
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unsigned char* key, unsigned int keylen, char** reason);
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#endif /* VALIDATOR_VAL_SECALGO_H */
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