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/* Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#pragma once
#include <libdnssec/key.h>
#include <libknot/rrset.h>
/**
* Performs referral authentication according to RFC4035 5.2, bullet 2
* @param ref Referral RRSet. Currently only DS can be used.
* @param key Already parsed key.
* @return 0 or error code. In particular: DNSSEC_INVALID_DS_ALGORITHM
* in case *all* DSs in ref use an unimplemented algorithm.
*/
int kr_authenticate_referral(const knot_rrset_t *ref, const dnssec_key_t *key);
/**
* Check the signature of the supplied RRSet.
* @param rrsig A single signature.
* @param key Key to be used to validate the signature.
* @param covered The covered RRSet.
* @param trim_labels Number of the leftmost labels to be removed and replaced with '*.'.
* @return 0 if signature valid, error code else.
*/
int kr_check_signature(const knot_rdata_t *rrsig,
const dnssec_key_t *key, const knot_rrset_t *covered,
int trim_labels);
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