flipperzero-firmware/lib/subghz/protocols/subghz_protocol_keeloq_common.h

#pragma once
#include "subghz_protocol_common.h"
#include "file-worker.h"

#include <furi.h>

/*
 * Keeloq
 * https://ru.wikipedia.org/wiki/KeeLoq
 * https://phreakerclub.com/forum/showthread.php?t=1094
 *
 */

#define KEELOQ_NLF 0x3A5C742E
#define bit(x, n) (((x) >> (n)) & 1)
#define g5(x, a, b, c, d, e) \
    (bit(x, a) + bit(x, b) * 2 + bit(x, c) * 4 + bit(x, d) * 8 + bit(x, e) * 16)

/*
 * KeeLoq learning types
 * https://phreakerclub.com/forum/showthread.php?t=67
 */
#define KEELOQ_LEARNING_UNKNOWN 0u
#define KEELOQ_LEARNING_SIMPLE 1u
#define KEELOQ_LEARNING_NORMAL 2u
#define KEELOQ_LEARNING_SECURE 3u

/** Simple Learning Encrypt
 * @param data - 0xBSSSCCCC, B(4bit) key, S(10bit) serial&0x3FF, C(16bit) counter
 * @param key - manufacture (64bit)
 * @return keelog encrypt data
 */
uint32_t subghz_protocol_keeloq_common_encrypt(const uint32_t data, const uint64_t key);

/** Simple Learning Decrypt
 * @param data - keelog encrypt data
 * @param key - manufacture (64bit)
 * @return 0xBSSSCCCC, B(4bit) key, S(10bit) serial&0x3FF, C(16bit) counter
 */
uint32_t subghz_protocol_keeloq_common_decrypt(const uint32_t data, const uint64_t key);

/** Normal Learning
 * @param data - serial number (28bit)
 * @param key - manufacture (64bit)
 * @return manufacture for this serial number (64bit)
 */
uint64_t subghz_protocol_keeloq_common_normal_learning(uint32_t data, const uint64_t key);

/** Secure Learning
 * @param data - serial number (28bit)
 * @param seed - serial number (32bit)
 * @param key - manufacture (64bit)
 * @return manufacture for this serial number (64bit)
 */

uint64_t
    subghz_protocol_keeloq_common_secure_learning(uint32_t data, uint32_t seed, const uint64_t key);