flipperzero-firmware/applications/lfrfid/helpers/protocols/protocol_indala_40134.cpp

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#include "protocol_indala_40134.h"
#include <furi.h>
typedef uint64_t Indala40134CardData;
static void set_bit(bool bit, uint8_t position, Indala40134CardData* card_data) {
position = (sizeof(Indala40134CardData) * 8) - 1 - position;
if(bit) {
*card_data |= 1ull << position;
} else {
*card_data &= ~(1ull << position);
}
}
static bool get_bit(uint8_t position, const Indala40134CardData* card_data) {
position = (sizeof(Indala40134CardData) * 8) - 1 - position;
return (*card_data >> position) & 1;
}
uint8_t ProtocolIndala40134::get_encoded_data_size() {
return sizeof(Indala40134CardData);
}
uint8_t ProtocolIndala40134::get_decoded_data_size() {
return 3;
}
void ProtocolIndala40134::encode(
const uint8_t* decoded_data,
const uint8_t decoded_data_size,
uint8_t* encoded_data,
const uint8_t encoded_data_size) {
furi_check(decoded_data_size >= get_decoded_data_size());
furi_check(encoded_data_size >= get_encoded_data_size());
uint32_t fc_and_card = (decoded_data[0] << 16) | (decoded_data[1] << 8) | decoded_data[2];
Indala40134CardData card_data = 0;
// preamble
set_bit(1, 0, &card_data);
set_bit(1, 2, &card_data);
set_bit(1, 32, &card_data);
// factory code
set_bit(((fc_and_card >> 23) & 1), 57, &card_data);
set_bit(((fc_and_card >> 22) & 1), 49, &card_data);
set_bit(((fc_and_card >> 21) & 1), 44, &card_data);
set_bit(((fc_and_card >> 20) & 1), 47, &card_data);
set_bit(((fc_and_card >> 19) & 1), 48, &card_data);
set_bit(((fc_and_card >> 18) & 1), 53, &card_data);
set_bit(((fc_and_card >> 17) & 1), 39, &card_data);
set_bit(((fc_and_card >> 16) & 1), 58, &card_data);
// card number
set_bit(((fc_and_card >> 15) & 1), 42, &card_data);
set_bit(((fc_and_card >> 14) & 1), 45, &card_data);
set_bit(((fc_and_card >> 13) & 1), 43, &card_data);
set_bit(((fc_and_card >> 12) & 1), 40, &card_data);
set_bit(((fc_and_card >> 11) & 1), 52, &card_data);
set_bit(((fc_and_card >> 10) & 1), 36, &card_data);
set_bit(((fc_and_card >> 9) & 1), 35, &card_data);
set_bit(((fc_and_card >> 8) & 1), 51, &card_data);
set_bit(((fc_and_card >> 7) & 1), 46, &card_data);
set_bit(((fc_and_card >> 6) & 1), 33, &card_data);
set_bit(((fc_and_card >> 5) & 1), 37, &card_data);
set_bit(((fc_and_card >> 4) & 1), 54, &card_data);
set_bit(((fc_and_card >> 3) & 1), 56, &card_data);
set_bit(((fc_and_card >> 2) & 1), 59, &card_data);
set_bit(((fc_and_card >> 1) & 1), 50, &card_data);
set_bit(((fc_and_card >> 0) & 1), 41, &card_data);
// checksum
uint8_t checksum = 0;
checksum += ((fc_and_card >> 14) & 1);
checksum += ((fc_and_card >> 12) & 1);
checksum += ((fc_and_card >> 9) & 1);
checksum += ((fc_and_card >> 8) & 1);
checksum += ((fc_and_card >> 6) & 1);
checksum += ((fc_and_card >> 5) & 1);
checksum += ((fc_and_card >> 2) & 1);
checksum += ((fc_and_card >> 0) & 1);
// wiegand parity bits
// even parity sum calculation (high 12 bits of data)
uint8_t even_parity_sum = 0;
for(int8_t i = 12; i < 24; i++) {
if(((fc_and_card >> i) & 1) == 1) {
even_parity_sum++;
}
}
// odd parity sum calculation (low 12 bits of data)
uint8_t odd_parity_sum = 1;
for(int8_t i = 0; i < 12; i++) {
if(((fc_and_card >> i) & 1) == 1) {
odd_parity_sum++;
}
}
// even parity bit
set_bit((even_parity_sum % 2), 34, &card_data);
// odd parity bit
set_bit((odd_parity_sum % 2), 38, &card_data);
// checksum
if((checksum & 1) == 1) {
set_bit(0, 62, &card_data);
set_bit(1, 63, &card_data);
} else {
set_bit(1, 62, &card_data);
set_bit(0, 63, &card_data);
}
memcpy(encoded_data, &card_data, get_encoded_data_size());
}
// factory code
static uint8_t get_fc(const Indala40134CardData* card_data) {
uint8_t fc = 0;
fc = fc << 1 | get_bit(57, card_data);
fc = fc << 1 | get_bit(49, card_data);
fc = fc << 1 | get_bit(44, card_data);
fc = fc << 1 | get_bit(47, card_data);
fc = fc << 1 | get_bit(48, card_data);
fc = fc << 1 | get_bit(53, card_data);
fc = fc << 1 | get_bit(39, card_data);
fc = fc << 1 | get_bit(58, card_data);
return fc;
}
// card number
static uint16_t get_cn(const Indala40134CardData* card_data) {
uint16_t cn = 0;
cn = cn << 1 | get_bit(42, card_data);
cn = cn << 1 | get_bit(45, card_data);
cn = cn << 1 | get_bit(43, card_data);
cn = cn << 1 | get_bit(40, card_data);
cn = cn << 1 | get_bit(52, card_data);
cn = cn << 1 | get_bit(36, card_data);
cn = cn << 1 | get_bit(35, card_data);
cn = cn << 1 | get_bit(51, card_data);
cn = cn << 1 | get_bit(46, card_data);
cn = cn << 1 | get_bit(33, card_data);
cn = cn << 1 | get_bit(37, card_data);
cn = cn << 1 | get_bit(54, card_data);
cn = cn << 1 | get_bit(56, card_data);
cn = cn << 1 | get_bit(59, card_data);
cn = cn << 1 | get_bit(50, card_data);
cn = cn << 1 | get_bit(41, card_data);
return cn;
}
void ProtocolIndala40134::decode(
const uint8_t* encoded_data,
const uint8_t encoded_data_size,
uint8_t* decoded_data,
const uint8_t decoded_data_size) {
furi_check(decoded_data_size >= get_decoded_data_size());
furi_check(encoded_data_size >= get_encoded_data_size());
const Indala40134CardData* card_data =
reinterpret_cast<const Indala40134CardData*>(encoded_data);
uint8_t fc = get_fc(card_data);
uint16_t card = get_cn(card_data);
decoded_data[0] = fc;
decoded_data[1] = card >> 8;
decoded_data[2] = card;
}
bool ProtocolIndala40134::can_be_decoded(
const uint8_t* encoded_data,
const uint8_t encoded_data_size) {
furi_check(encoded_data_size >= get_encoded_data_size());
bool can_be_decoded = false;
const Indala40134CardData* card_data =
reinterpret_cast<const Indala40134CardData*>(encoded_data);
do {
// preambula
if((*card_data >> 32) != 0xa0000000UL) break;
// data
const uint32_t fc_and_card = get_fc(card_data) << 16 | get_cn(card_data);
// checksum
const uint8_t checksum = get_bit(62, card_data) << 1 | get_bit(63, card_data);
uint8_t checksum_sum = 0;
checksum_sum += ((fc_and_card >> 14) & 1);
checksum_sum += ((fc_and_card >> 12) & 1);
checksum_sum += ((fc_and_card >> 9) & 1);
checksum_sum += ((fc_and_card >> 8) & 1);
checksum_sum += ((fc_and_card >> 6) & 1);
checksum_sum += ((fc_and_card >> 5) & 1);
checksum_sum += ((fc_and_card >> 2) & 1);
checksum_sum += ((fc_and_card >> 0) & 1);
checksum_sum = checksum_sum & 0b1;
if(checksum_sum == 1 && checksum == 0b01) {
} else if(checksum_sum == 0 && checksum == 0b10) {
} else {
break;
}
// wiegand parity bits
// even parity sum calculation (high 12 bits of data)
const bool even_parity = get_bit(34, card_data);
uint8_t even_parity_sum = 0;
for(int8_t i = 12; i < 24; i++) {
if(((fc_and_card >> i) & 1) == 1) {
even_parity_sum++;
}
}
if(even_parity_sum % 2 != even_parity) break;
// odd parity sum calculation (low 12 bits of data)
const bool odd_parity = get_bit(38, card_data);
uint8_t odd_parity_sum = 1;
for(int8_t i = 0; i < 12; i++) {
if(((fc_and_card >> i) & 1) == 1) {
odd_parity_sum++;
}
}
if(odd_parity_sum % 2 != odd_parity) break;
can_be_decoded = true;
} while(false);
return can_be_decoded;
}