mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-10-31 16:42:34 +08:00
93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
//-----------------------------------------------------------------------------
|
|
// 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.
|
|
//-----------------------------------------------------------------------------
|
|
// Generic CRC calculation code.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifndef __CRC_H
|
|
#define __CRC_H
|
|
|
|
#include "common.h"
|
|
|
|
typedef struct crc_ctx {
|
|
uint32_t state;
|
|
int order;
|
|
uint32_t polynom;
|
|
uint32_t initial_value;
|
|
uint32_t final_xor;
|
|
uint32_t mask;
|
|
int topbit;
|
|
bool refin; /* Parameter: Reflect input bytes? */
|
|
bool refout; /* Parameter: Reflect output CRC? */
|
|
} crc_t;
|
|
|
|
/* Static initialization of a crc structure */
|
|
#define CRC_INITIALIZER(_order, _polynom, _initial_value, _final_xor) { \
|
|
.state = ((_initial_value) & ((1L<<(_order))-1)), \
|
|
.order = (_order), \
|
|
.polynom = (_polynom), \
|
|
.initial_value = (_initial_value), \
|
|
.final_xor = (_final_xor), \
|
|
.mask = ((1L<<(_order))-1) \
|
|
.refin = false, \
|
|
.refout = false \
|
|
}
|
|
|
|
/* Initialize a crc structure. order is the order of the polynom, e.g. 32 for a CRC-32
|
|
* polynom is the CRC polynom. initial_value is the initial value of a clean state.
|
|
* final_xor is XORed onto the state before returning it from crc_result().
|
|
* refin is the setting for reversing (bitwise) the bytes during crc
|
|
* refot is the setting for reversing (bitwise) the crc byte before returning it.
|
|
*/
|
|
void crc_init_ref(crc_t *crc, int order, uint32_t polynom, uint32_t initial_value, uint32_t final_xor, bool refin, bool refout);
|
|
|
|
/* Initialize a crc structure. order is the order of the polynom, e.g. 32 for a CRC-32
|
|
* polynom is the CRC polynom. initial_value is the initial value of a clean state.
|
|
* final_xor is XORed onto the state before returning it from crc_result(). */
|
|
void crc_init(crc_t *crc, int order, uint32_t polynom, uint32_t initial_value, uint32_t final_xor);
|
|
|
|
|
|
/* Update the crc state. data is the data of length data_width bits (only the
|
|
* data_width lower-most bits are used).
|
|
*/
|
|
void crc_update(crc_t *crc, uint32_t data, int data_width);
|
|
void crc_update2(crc_t *crc, uint32_t data, int data_width);
|
|
|
|
/* Clean the crc state, e.g. reset it to initial_value */
|
|
void crc_clear(crc_t *crc);
|
|
|
|
/* Get the result of the crc calculation */
|
|
uint32_t crc_finish(crc_t *crc);
|
|
|
|
// Calculate CRC-8/Maxim checksum
|
|
uint32_t CRC8Maxim(uint8_t *buff, size_t size);
|
|
|
|
// Calculate CRC-8 Mifare MAD checksum
|
|
uint32_t CRC8Mad(uint8_t *buff, size_t size);
|
|
|
|
// Calculate CRC-4/Legic checksum
|
|
uint32_t CRC4Legic(uint8_t *buff, size_t size);
|
|
|
|
// Calculate CRC-8/Legic checksum
|
|
uint32_t CRC8Legic(uint8_t *buff, size_t size);
|
|
|
|
// Calculate CRC-8/Cardx checksum
|
|
uint32_t CRC8Cardx(uint8_t *buff, size_t size);
|
|
|
|
// Calculate CRC-8/Hitag1, ZX8211 checksum
|
|
uint32_t CRC8Hitag1(uint8_t *buff, size_t size);
|
|
uint32_t CRC8Hitag1Bits(const uint8_t *buff, size_t bitsize);
|
|
|
|
#endif /* __CRC_H */
|