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/* Copyright (C) 2015 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/>.
*/
#pragma once
#include "libknot/packet/pkt.h"
#include "libknot/tsig.h"
/*!
* \brief Holds data required between signing and signature verification.
*/
struct sign_context {
size_t digest_size;
uint8_t *digest;
const knot_tsig_key_t *tsig_key;
};
typedef struct sign_context sign_context_t;
/*!
* \brief Initialize signing context for TSIG.
*/
int sign_context_init_tsig(sign_context_t *ctx, const knot_tsig_key_t *key);
/*!
* \brief Clean up signing context.
*
* \param ctx Sign context.
*/
void sign_context_deinit(sign_context_t *ctx);
/*!
* \brief Signs outgoing DNS packet.
*
* \param pkt Packet to sign.
* \param sign_ctx Signing context.
*
* \return Error code, KNOT_EOK if successful.
*/
int sign_packet(knot_pkt_t *pkt, sign_context_t *sign_ctx);
/*!
* \brief Verifies signature for incoming DNS packet.
*
* \param pkt Packet verify sign.
* \param sign_ctx Signing context.
*
* \return Error code, KNOT_EOK if successful.
*/
int verify_packet(const knot_pkt_t *pkt, const sign_context_t *sign_ctx);
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