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/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*!
* \file
*
* \brief TSIG manipulation.
*
* \addtogroup rrtype
* @{
*/
#pragma once
#include <stdint.h>
#include "libdnssec/binary.h"
#include "libdnssec/tsig.h"
#include "libknot/consts.h"
#include "libknot/rrset.h"
#include "libknot/tsig.h"
enum tsig_consts {
KNOT_TSIG_ITEM_COUNT = 7,
KNOT_TSIG_VARIABLES_LENGTH = sizeof(uint16_t) // class
+ sizeof(uint32_t) // ttl
+ 6 // time signed
+ sizeof(uint16_t) // fudge
+ sizeof(uint16_t) // error
+ sizeof(uint16_t),// other data length
KNOT_TSIG_TIMERS_LENGTH = sizeof(uint16_t) //fudge
+ 6 // time signed
};
/*!
* \brief Create TSIG RDATA.
*
* \param rr TSIG RR to contain created data.
* \param alg Algorithm name.
* \param maclen Algorithm MAC len (may be set to 0 for empty MAC).
* \param tsig_err TSIG error code.
*
* \retval KNOT_EINVAL
* \retval KNOT_EOK
*/
int knot_tsig_create_rdata(knot_rrset_t *rr, const knot_dname_t *alg,
uint16_t maclen, uint16_t tsig_err);
int knot_tsig_rdata_set_time_signed(knot_rrset_t *tsig, uint64_t time);
int knot_tsig_rdata_store_current_time(knot_rrset_t *tsig);
int knot_tsig_rdata_set_fudge(knot_rrset_t *tsig, uint16_t fudge);
int knot_tsig_rdata_set_mac(knot_rrset_t *tsig, uint16_t length, const uint8_t *mac);
int knot_tsig_rdata_set_orig_id(knot_rrset_t *tsig, uint16_t id);
int knot_tsig_rdata_set_other_data(knot_rrset_t *tsig, uint16_t length,
const uint8_t *other_data);
const knot_dname_t *knot_tsig_rdata_alg_name(const knot_rrset_t *tsig);
dnssec_tsig_algorithm_t knot_tsig_rdata_alg(const knot_rrset_t *tsig);
uint64_t knot_tsig_rdata_time_signed(const knot_rrset_t *tsig);
uint16_t knot_tsig_rdata_fudge(const knot_rrset_t *tsig);
const uint8_t *knot_tsig_rdata_mac(const knot_rrset_t *tsig);
size_t knot_tsig_rdata_mac_length(const knot_rrset_t *tsig);
uint16_t knot_tsig_rdata_orig_id(const knot_rrset_t *tsig);
uint16_t knot_tsig_rdata_error(const knot_rrset_t *tsig);
const uint8_t *knot_tsig_rdata_other_data(const knot_rrset_t *tsig);
uint16_t knot_tsig_rdata_other_data_length(const knot_rrset_t *tsig);
size_t knot_tsig_rdata_tsig_variables_length(const knot_rrset_t *tsig);
size_t knot_tsig_rdata_tsig_timers_length(void);
/*!
* \brief Return standard TSIG RRSET wire size for given algorithm.
*
* \param key Signing key descriptor.
*
* \return RRSET wire size.
*/
size_t knot_tsig_wire_size(const knot_tsig_key_t *key);
/*!
* \brief Return TSIG RRSET maximum wire size for given algorithm.
*
* This size is reached if error reply with BADTIME.
*
* \param key Signing key descriptor.
*
* \return RRSET wire size.
*/
size_t knot_tsig_wire_maxsize(const knot_tsig_key_t *key);
/*! \todo Documentation. */
bool knot_tsig_rdata_is_ok(const knot_rrset_t *tsig);
/*! @} */
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