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/*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CRYPTO_KMAC_H_
#define CRYPTO_KMAC_H_
#include <repgp/repgp_def.h>
#include "types.h"
#include "config.h"
#include "key.hpp"
namespace rnp {
class KMAC256 {
/* KDF for PQC key combiner according to
protected:
/* The value of domSeparation is the UTF-8 encoding of the string
"OpenPGPCompositeKeyDerivationFunction" and MUST be the following octet sequence:
domSeparation := 4F 70 65 6E 50 47 50 43 6F 6D 70 6F 73 69 74 65
4B 65 79 44 65 72 69 76 61 74 69 6F 6E 46 75 6E
63 74 69 6F 6E
*/
const std::vector<uint8_t> domSeparation_ = std::vector<uint8_t>(
{0x4F, 0x70, 0x65, 0x6E, 0x50, 0x47, 0x50, 0x43, 0x6F, 0x6D, 0x70, 0x6F, 0x73,
0x69, 0x74, 0x65, 0x4B, 0x65, 0x79, 0x44, 0x65, 0x72, 0x69, 0x76, 0x61, 0x74,
0x69, 0x6F, 0x6E, 0x46, 0x75, 0x6E, 0x63, 0x74, 0x69, 0x6F, 0x6E});
/* customizationString := 4B 44 46 */
const std::vector<uint8_t> customizationString_ = std::vector<uint8_t>({0x4B, 0x44, 0x46});
/* counter - a 4 byte counter set to the value 1 */
const std::vector<uint8_t> counter_ = std::vector<uint8_t>({0x00, 0x00, 0x00, 0x01});
std::vector<uint8_t> domSeparation() const;
std::vector<uint8_t> customizationString() const;
std::vector<uint8_t> counter() const;
std::vector<uint8_t> fixedInfo(pgp_pubkey_alg_t alg_id);
std::vector<uint8_t> encData(const std::vector<uint8_t> &ecc_key_share,
const std::vector<uint8_t> &ecc_ciphertext,
const std::vector<uint8_t> &kyber_key_share,
const std::vector<uint8_t> &kyber_ciphertext,
pgp_pubkey_alg_t alg_id);
KMAC256(){};
public:
static std::unique_ptr<KMAC256> create();
/* KMAC interface for OpenPGP PQC composite algorithms */
virtual void compute(const std::vector<uint8_t> &ecc_key_share,
const std::vector<uint8_t> &ecc_key_ciphertext,
const std::vector<uint8_t> &kyber_key_share,
const std::vector<uint8_t> &kyber_ciphertext,
const pgp_pubkey_alg_t alg_id,
std::vector<uint8_t> & out) = 0;
virtual ~KMAC256();
};
} // namespace rnp
#endif