128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
#include "keeloq_common.h"
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#include <furi.h>
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#include <m-array.h>
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#define bit(x, n) (((x) >> (n)) & 1)
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#define g5(x, a, b, c, d, e) \
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(bit(x, a) + bit(x, b) * 2 + bit(x, c) * 4 + bit(x, d) * 8 + bit(x, e) * 16)
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/** Simple Learning Encrypt
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* @param data - 0xBSSSCCCC, B(4bit) key, S(10bit) serial&0x3FF, C(16bit) counter
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* @param key - manufacture (64bit)
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* @return keeloq encrypt data
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*/
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inline uint32_t subghz_protocol_keeloq_common_encrypt(const uint32_t data, const uint64_t key) {
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uint32_t x = data, r;
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for(r = 0; r < 528; r++)
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x = (x >> 1) ^ ((bit(x, 0) ^ bit(x, 16) ^ (uint32_t)bit(key, r & 63) ^
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bit(KEELOQ_NLF, g5(x, 1, 9, 20, 26, 31)))
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<< 31);
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return x;
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}
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/** Simple Learning Decrypt
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* @param data - keeloq encrypt data
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* @param key - manufacture (64bit)
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* @return 0xBSSSCCCC, B(4bit) key, S(10bit) serial&0x3FF, C(16bit) counter
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*/
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inline uint32_t subghz_protocol_keeloq_common_decrypt(const uint32_t data, const uint64_t key) {
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uint32_t x = data, r;
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for(r = 0; r < 528; r++)
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x = (x << 1) ^ bit(x, 31) ^ bit(x, 15) ^ (uint32_t)bit(key, (15 - r) & 63) ^
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bit(KEELOQ_NLF, g5(x, 0, 8, 19, 25, 30));
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return x;
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}
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/** Normal Learning
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* @param data - serial number (28bit)
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* @param key - manufacture (64bit)
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* @return manufacture for this serial number (64bit)
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*/
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inline uint64_t subghz_protocol_keeloq_common_normal_learning(uint32_t data, const uint64_t key) {
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uint32_t k1, k2;
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data &= 0x0FFFFFFF;
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data |= 0x20000000;
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k1 = subghz_protocol_keeloq_common_decrypt(data, key);
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data &= 0x0FFFFFFF;
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data |= 0x60000000;
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k2 = subghz_protocol_keeloq_common_decrypt(data, key);
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return ((uint64_t)k2 << 32) | k1; // key - shifrovanoya
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}
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/** Secure Learning
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* @param data - serial number (28bit)
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* @param seed - seed number (32bit)
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* @param key - manufacture (64bit)
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* @return manufacture for this serial number (64bit)
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*/
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inline uint64_t subghz_protocol_keeloq_common_secure_learning(
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uint32_t data,
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uint32_t seed,
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const uint64_t key) {
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uint32_t k1, k2;
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data &= 0x0FFFFFFF;
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k1 = subghz_protocol_keeloq_common_decrypt(data, key);
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k2 = subghz_protocol_keeloq_common_decrypt(seed, key);
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return ((uint64_t)k1 << 32) | k2;
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}
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/** Magic_xor_type1 Learning
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* @param data - serial number (28bit)
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* @param xor - magic xor (64bit)
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* @return manufacture for this serial number (64bit)
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*/
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inline uint64_t
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subghz_protocol_keeloq_common_magic_xor_type1_learning(uint32_t data, uint64_t xor) {
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data &= 0x0FFFFFFF;
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return (((uint64_t)data << 32) | data) ^ xor;
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}
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/** Magic_serial_type1 Learning
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* @param data - serial number (28bit)
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* @param man - magic man (64bit)
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* @return manufacture for this serial number (64bit)
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*/
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inline uint64_t
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subghz_protocol_keeloq_common_magic_serial_type1_learning(uint32_t data, uint64_t man) {
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return (man & 0xFFFFFFFF) | ((uint64_t)data << 40) |
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((uint64_t)(((data & 0xff) + ((data >> 8) & 0xFF)) & 0xFF) << 32);
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}
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/** Magic_serial_type2 Learning
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* @param data - btn+serial number (32bit)
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* @param man - magic man (64bit)
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* @return manufacture for this serial number (64bit)
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*/
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inline uint64_t
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subghz_protocol_keeloq_common_magic_serial_type2_learning(uint32_t data, uint64_t man) {
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uint8_t* p = (uint8_t*)&data;
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uint8_t* m = (uint8_t*)&man;
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m[7] = p[0];
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m[6] = p[1];
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m[5] = p[2];
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m[4] = p[3];
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return man;
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}
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/** Magic_serial_type3 Learning
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* @param data - serial number (24bit)
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* @param man - magic man (64bit)
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* @return manufacture for this serial number (64bit)
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*/
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inline uint64_t
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subghz_protocol_keeloq_common_magic_serial_type3_learning(uint32_t data, uint64_t man) {
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return (man & 0xFFFFFFFFFF000000) | (data & 0xFFFFFF);
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}
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