unbound/validator/val_secalgo.h

   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 /**
  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  */
  52 size_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  */
  61 int 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 */
  65 int 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  */
  80 enum 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 */