357 lines
12 KiB
C
357 lines
12 KiB
C
#include <furi.h>
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#include <toolbox/protocols/protocol.h>
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#include <lfrfid/tools/bit_lib.h>
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#include "lfrfid_protocols.h"
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#define INDALA26_PREAMBLE_BIT_SIZE (33)
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#define INDALA26_PREAMBLE_DATA_SIZE (5)
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#define INDALA26_ENCODED_BIT_SIZE (64)
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#define INDALA26_ENCODED_DATA_SIZE \
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(((INDALA26_ENCODED_BIT_SIZE) / 8) + INDALA26_PREAMBLE_DATA_SIZE)
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#define INDALA26_ENCODED_DATA_LAST ((INDALA26_ENCODED_BIT_SIZE) / 8)
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#define INDALA26_DECODED_BIT_SIZE (28)
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#define INDALA26_DECODED_DATA_SIZE (4)
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#define INDALA26_US_PER_BIT (255)
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#define INDALA26_ENCODER_PULSES_PER_BIT (16)
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typedef struct {
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uint8_t data_index;
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uint8_t bit_clock_index;
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bool last_bit;
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bool current_polarity;
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bool pulse_phase;
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} ProtocolIndalaEncoder;
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typedef struct {
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uint8_t encoded_data[INDALA26_ENCODED_DATA_SIZE];
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uint8_t negative_encoded_data[INDALA26_ENCODED_DATA_SIZE];
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uint8_t corrupted_encoded_data[INDALA26_ENCODED_DATA_SIZE];
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uint8_t corrupted_negative_encoded_data[INDALA26_ENCODED_DATA_SIZE];
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uint8_t data[INDALA26_DECODED_DATA_SIZE];
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ProtocolIndalaEncoder encoder;
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} ProtocolIndala;
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ProtocolIndala* protocol_indala26_alloc(void) {
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ProtocolIndala* protocol = malloc(sizeof(ProtocolIndala));
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return protocol;
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};
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void protocol_indala26_free(ProtocolIndala* protocol) {
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free(protocol);
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};
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uint8_t* protocol_indala26_get_data(ProtocolIndala* protocol) {
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return protocol->data;
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};
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void protocol_indala26_decoder_start(ProtocolIndala* protocol) {
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memset(protocol->encoded_data, 0, INDALA26_ENCODED_DATA_SIZE);
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memset(protocol->negative_encoded_data, 0, INDALA26_ENCODED_DATA_SIZE);
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memset(protocol->corrupted_encoded_data, 0, INDALA26_ENCODED_DATA_SIZE);
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memset(protocol->corrupted_negative_encoded_data, 0, INDALA26_ENCODED_DATA_SIZE);
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};
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static bool protocol_indala26_check_preamble(uint8_t* data, size_t bit_index) {
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// Preamble 10100000 00000000 00000000 00000000 1
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if(*(uint32_t*)&data[bit_index / 8] != 0b00000000000000000000000010100000) return false;
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if(bit_lib_get_bit(data, bit_index + 32) != 1) return false;
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return true;
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}
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static bool protocol_indala26_can_be_decoded(uint8_t* data) {
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if(!protocol_indala26_check_preamble(data, 0)) return false;
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if(!protocol_indala26_check_preamble(data, 64)) return false;
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if(bit_lib_get_bit(data, 61) != 0) return false;
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if(bit_lib_get_bit(data, 60) != 0) return false;
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return true;
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}
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static bool protocol_indala26_decoder_feed_internal(bool polarity, uint32_t time, uint8_t* data) {
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time += (INDALA26_US_PER_BIT / 2);
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size_t bit_count = (time / INDALA26_US_PER_BIT);
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bool result = false;
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if(bit_count < INDALA26_ENCODED_BIT_SIZE) {
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for(size_t i = 0; i < bit_count; i++) {
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bit_lib_push_bit(data, INDALA26_ENCODED_DATA_SIZE, polarity);
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if(protocol_indala26_can_be_decoded(data)) {
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result = true;
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break;
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}
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}
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}
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return result;
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}
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static void protocol_indala26_decoder_save(uint8_t* data_to, const uint8_t* data_from) {
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bit_lib_copy_bits(data_to, 0, 22, data_from, 33);
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bit_lib_copy_bits(data_to, 22, 5, data_from, 55);
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bit_lib_copy_bits(data_to, 27, 2, data_from, 62);
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}
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bool protocol_indala26_decoder_feed(ProtocolIndala* protocol, bool level, uint32_t duration) {
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bool result = false;
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if(duration > (INDALA26_US_PER_BIT / 2)) {
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if(protocol_indala26_decoder_feed_internal(level, duration, protocol->encoded_data)) {
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protocol_indala26_decoder_save(protocol->data, protocol->encoded_data);
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FURI_LOG_D("Indala26", "Positive");
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result = true;
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return result;
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}
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if(protocol_indala26_decoder_feed_internal(
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!level, duration, protocol->negative_encoded_data)) {
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protocol_indala26_decoder_save(protocol->data, protocol->negative_encoded_data);
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FURI_LOG_D("Indala26", "Negative");
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result = true;
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return result;
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}
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}
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if(duration > (INDALA26_US_PER_BIT / 4)) {
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// Try to decode wrong phase synced data
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if(level) {
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duration += 120;
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} else {
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if(duration > 120) {
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duration -= 120;
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}
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}
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if(protocol_indala26_decoder_feed_internal(
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level, duration, protocol->corrupted_encoded_data)) {
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protocol_indala26_decoder_save(protocol->data, protocol->corrupted_encoded_data);
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FURI_LOG_D("Indala26", "Positive Corrupted");
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result = true;
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return result;
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}
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if(protocol_indala26_decoder_feed_internal(
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!level, duration, protocol->corrupted_negative_encoded_data)) {
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protocol_indala26_decoder_save(
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protocol->data, protocol->corrupted_negative_encoded_data);
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FURI_LOG_D("Indala26", "Negative Corrupted");
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result = true;
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return result;
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}
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}
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return result;
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};
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bool protocol_indala26_encoder_start(ProtocolIndala* protocol) {
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memset(protocol->encoded_data, 0, INDALA26_ENCODED_DATA_SIZE);
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*(uint32_t*)&protocol->encoded_data[0] = 0b00000000000000000000000010100000;
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bit_lib_set_bit(protocol->encoded_data, 32, 1);
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bit_lib_copy_bits(protocol->encoded_data, 33, 22, protocol->data, 0);
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bit_lib_copy_bits(protocol->encoded_data, 55, 5, protocol->data, 22);
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bit_lib_copy_bits(protocol->encoded_data, 62, 2, protocol->data, 27);
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protocol->encoder.last_bit =
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bit_lib_get_bit(protocol->encoded_data, INDALA26_ENCODED_BIT_SIZE - 1);
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protocol->encoder.data_index = 0;
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protocol->encoder.current_polarity = true;
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protocol->encoder.pulse_phase = true;
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protocol->encoder.bit_clock_index = 0;
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return true;
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};
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LevelDuration protocol_indala26_encoder_yield(ProtocolIndala* protocol) {
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LevelDuration level_duration;
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ProtocolIndalaEncoder* encoder = &protocol->encoder;
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if(encoder->pulse_phase) {
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level_duration = level_duration_make(encoder->current_polarity, 1);
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encoder->pulse_phase = false;
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} else {
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level_duration = level_duration_make(!encoder->current_polarity, 1);
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encoder->pulse_phase = true;
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encoder->bit_clock_index++;
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if(encoder->bit_clock_index >= INDALA26_ENCODER_PULSES_PER_BIT) {
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encoder->bit_clock_index = 0;
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bool current_bit = bit_lib_get_bit(protocol->encoded_data, encoder->data_index);
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if(current_bit != encoder->last_bit) {
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encoder->current_polarity = !encoder->current_polarity;
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}
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encoder->last_bit = current_bit;
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bit_lib_increment_index(encoder->data_index, INDALA26_ENCODED_BIT_SIZE);
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}
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}
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return level_duration;
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};
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// factory code
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static uint8_t get_fc(const uint8_t* data) {
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uint8_t fc = 0;
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fc = fc << 1 | bit_lib_get_bit(data, 24);
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fc = fc << 1 | bit_lib_get_bit(data, 16);
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fc = fc << 1 | bit_lib_get_bit(data, 11);
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fc = fc << 1 | bit_lib_get_bit(data, 14);
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fc = fc << 1 | bit_lib_get_bit(data, 15);
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fc = fc << 1 | bit_lib_get_bit(data, 20);
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fc = fc << 1 | bit_lib_get_bit(data, 6);
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fc = fc << 1 | bit_lib_get_bit(data, 25);
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return fc;
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}
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// card number
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static uint16_t get_cn(const uint8_t* data) {
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uint16_t cn = 0;
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cn = cn << 1 | bit_lib_get_bit(data, 9);
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cn = cn << 1 | bit_lib_get_bit(data, 12);
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cn = cn << 1 | bit_lib_get_bit(data, 10);
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cn = cn << 1 | bit_lib_get_bit(data, 7);
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cn = cn << 1 | bit_lib_get_bit(data, 19);
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cn = cn << 1 | bit_lib_get_bit(data, 3);
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cn = cn << 1 | bit_lib_get_bit(data, 2);
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cn = cn << 1 | bit_lib_get_bit(data, 18);
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cn = cn << 1 | bit_lib_get_bit(data, 13);
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cn = cn << 1 | bit_lib_get_bit(data, 0);
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cn = cn << 1 | bit_lib_get_bit(data, 4);
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cn = cn << 1 | bit_lib_get_bit(data, 21);
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cn = cn << 1 | bit_lib_get_bit(data, 23);
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cn = cn << 1 | bit_lib_get_bit(data, 26);
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cn = cn << 1 | bit_lib_get_bit(data, 17);
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cn = cn << 1 | bit_lib_get_bit(data, 8);
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return cn;
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}
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void protocol_indala26_render_data_internal(
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ProtocolIndala* protocol,
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FuriString* result,
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bool brief) {
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bool wiegand_correct = true;
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bool checksum_correct = true;
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const uint8_t fc = get_fc(protocol->data);
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const uint16_t card = get_cn(protocol->data);
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const uint32_t fc_and_card = fc << 16 | card;
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const uint8_t checksum = bit_lib_get_bit(protocol->data, 27) << 1 |
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bit_lib_get_bit(protocol->data, 28);
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const bool even_parity = bit_lib_get_bit(protocol->data, 1);
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const bool odd_parity = bit_lib_get_bit(protocol->data, 5);
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// indala checksum
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uint8_t checksum_sum = 0;
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checksum_sum += ((fc_and_card >> 14) & 1);
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checksum_sum += ((fc_and_card >> 12) & 1);
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checksum_sum += ((fc_and_card >> 9) & 1);
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checksum_sum += ((fc_and_card >> 8) & 1);
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checksum_sum += ((fc_and_card >> 6) & 1);
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checksum_sum += ((fc_and_card >> 5) & 1);
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checksum_sum += ((fc_and_card >> 2) & 1);
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checksum_sum += ((fc_and_card >> 0) & 1);
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checksum_sum = checksum_sum & 0b1;
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if(checksum_sum == 1 && checksum == 0b01) {
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} else if(checksum_sum == 0 && checksum == 0b10) {
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} else {
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checksum_correct = false;
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}
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// wiegand parity
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uint8_t even_parity_sum = 0;
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for(int8_t i = 12; i < 24; i++) {
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if(((fc_and_card >> i) & 1) == 1) {
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even_parity_sum++;
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}
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}
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if(even_parity_sum % 2 != even_parity) wiegand_correct = false;
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uint8_t odd_parity_sum = 1;
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for(int8_t i = 0; i < 12; i++) {
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if(((fc_and_card >> i) & 1) == 1) {
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odd_parity_sum++;
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}
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}
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if(odd_parity_sum % 2 != odd_parity) wiegand_correct = false;
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if(brief) {
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furi_string_printf(
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result,
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"FC: %u\r\nCard: %u, Parity:%s%s",
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fc,
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card,
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(checksum_correct ? "+" : "-"),
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(wiegand_correct ? "+" : "-"));
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} else {
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furi_string_printf(
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result,
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"FC: %u\r\n"
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"Card: %u\r\n"
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"Checksum: %s\r\n"
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"W26 Parity: %s",
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fc,
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card,
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(checksum_correct ? "+" : "-"),
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(wiegand_correct ? "+" : "-"));
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}
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}
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void protocol_indala26_render_data(ProtocolIndala* protocol, FuriString* result) {
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protocol_indala26_render_data_internal(protocol, result, false);
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}
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void protocol_indala26_render_brief_data(ProtocolIndala* protocol, FuriString* result) {
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protocol_indala26_render_data_internal(protocol, result, true);
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}
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bool protocol_indala26_write_data(ProtocolIndala* protocol, void* data) {
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LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
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bool result = false;
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protocol_indala26_encoder_start(protocol);
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if(request->write_type == LFRFIDWriteTypeT5577) {
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request->t5577.block[0] = LFRFID_T5577_BITRATE_RF_32 | LFRFID_T5577_MODULATION_PSK1 |
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(2 << LFRFID_T5577_MAXBLOCK_SHIFT);
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request->t5577.block[1] = bit_lib_get_bits_32(protocol->encoded_data, 0, 32);
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request->t5577.block[2] = bit_lib_get_bits_32(protocol->encoded_data, 32, 32);
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request->t5577.blocks_to_write = 3;
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result = true;
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}
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return result;
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};
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const ProtocolBase protocol_indala26 = {
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.name = "Indala26",
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.manufacturer = "Motorola",
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.data_size = INDALA26_DECODED_DATA_SIZE,
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.features = LFRFIDFeaturePSK,
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.validate_count = 6,
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.alloc = (ProtocolAlloc)protocol_indala26_alloc,
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.free = (ProtocolFree)protocol_indala26_free,
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.get_data = (ProtocolGetData)protocol_indala26_get_data,
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.decoder =
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{
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.start = (ProtocolDecoderStart)protocol_indala26_decoder_start,
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.feed = (ProtocolDecoderFeed)protocol_indala26_decoder_feed,
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},
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.encoder =
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{
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.start = (ProtocolEncoderStart)protocol_indala26_encoder_start,
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.yield = (ProtocolEncoderYield)protocol_indala26_encoder_yield,
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},
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.render_data = (ProtocolRenderData)protocol_indala26_render_data,
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.render_brief_data = (ProtocolRenderData)protocol_indala26_render_brief_data,
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.write_data = (ProtocolWriteData)protocol_indala26_write_data,
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};
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