flipperzero-firmware/applications/plugins/picopass/loclass/optimized_ikeys.h

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//-----------------------------------------------------------------------------
// Borrowed initially from https://github.com/holiman/loclass
// More recently from https://github.com/RfidResearchGroup/proxmark3
// Copyright (C) 2014 Martin Holst Swende
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
//
// 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.
//
// See LICENSE.txt for the text of the license.
//-----------------------------------------------------------------------------
// WARNING
//
// THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
//
// USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
// PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
// AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
//
// THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
//-----------------------------------------------------------------------------
// It is a reconstruction of the cipher engine used in iClass, and RFID techology.
//
// The implementation is based on the work performed by
// Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
// Milosch Meriac in the paper "Dismantling IClass".
//-----------------------------------------------------------------------------
#ifndef IKEYS_H
#define IKEYS_H
#include <inttypes.h>
/**
* @brief
*Definition 11. Let the function loclass_hash0 : F 82 × F 82 × (F 62 ) 8 (F 82 ) 8 be defined as
* loclass_hash0(x, y, z [0] . . . z [7] ) = k [0] . . . k [7] where
* z'[i] = (z[i] mod (63-i)) + i i = 0...3
* z'[i+4] = (z[i+4] mod (64-i)) + i i = 0...3
* = check(z');
* @param c
* @param k this is where the diversified key is put (should be 8 bytes)
* @return
*/
void loclass_hash0(uint64_t c, uint8_t k[8]);
/**
* @brief Performs Elite-class key diversification
* @param csn
* @param key
* @param div_key
*/
void loclass_diversifyKey(uint8_t* csn, const uint8_t* key, uint8_t* div_key);
/**
* @brief Permutes a key from standard NIST format to Iclass specific format
* @param key
* @param dest
*/
#endif // IKEYS_H