flipperzero-firmware/lib/lfrfid/protocols/protocol_idteck.c

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2022-12-15 20:02:43 +00:00
#include <furi.h>
#include <toolbox/protocols/protocol.h>
#include <lfrfid/tools/bit_lib.h>
#include "lfrfid_protocols.h"
// Example: 4944544B 351FBE4B
// 01001001 01000100 01010100 01001011 00110101 00011111 10111110 01001011
// 4 9 4 4 5 4 4 B 3 5 1 F B E 4 B
// 0100 1001 0100 0100 0101 0100 0100 1011 0011 0101 0001 1111 1011 1110 0100 1011
#define IDTECK_PREAMBLE_BIT_SIZE (32)
#define IDTECK_PREAMBLE_DATA_SIZE (8)
#define IDTECK_ENCODED_BIT_SIZE (64)
#define IDTECK_ENCODED_DATA_SIZE (((IDTECK_ENCODED_BIT_SIZE) / 8) + IDTECK_PREAMBLE_DATA_SIZE)
#define IDTECK_ENCODED_DATA_LAST ((IDTECK_ENCODED_BIT_SIZE) / 8)
#define IDTECK_DECODED_BIT_SIZE (64)
#define IDTECK_DECODED_DATA_SIZE (8)
#define IDTECK_US_PER_BIT (255)
#define IDTECK_ENCODER_PULSES_PER_BIT (16)
typedef struct {
uint8_t data_index;
uint8_t bit_clock_index;
bool last_bit;
bool current_polarity;
bool pulse_phase;
} ProtocolIdteckEncoder;
typedef struct {
uint8_t encoded_data[IDTECK_ENCODED_DATA_SIZE];
uint8_t negative_encoded_data[IDTECK_ENCODED_DATA_SIZE];
uint8_t corrupted_encoded_data[IDTECK_ENCODED_DATA_SIZE];
uint8_t corrupted_negative_encoded_data[IDTECK_ENCODED_DATA_SIZE];
uint8_t data[IDTECK_DECODED_DATA_SIZE];
ProtocolIdteckEncoder encoder;
} ProtocolIdteck;
ProtocolIdteck* protocol_idteck_alloc(void) {
ProtocolIdteck* protocol = malloc(sizeof(ProtocolIdteck));
return protocol;
};
void protocol_idteck_free(ProtocolIdteck* protocol) {
free(protocol);
};
uint8_t* protocol_idteck_get_data(ProtocolIdteck* protocol) {
return protocol->data;
};
void protocol_idteck_decoder_start(ProtocolIdteck* protocol) {
memset(protocol->encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
memset(protocol->negative_encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
memset(protocol->corrupted_encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
memset(protocol->corrupted_negative_encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
};
static bool protocol_idteck_check_preamble(uint8_t* data, size_t bit_index) {
// Preamble 01001001 01000100 01010100 01001011
if(*(uint32_t*)&data[bit_index / 8] != 0b01001011010101000100010001001001) return false;
return true;
}
static bool protocol_idteck_can_be_decoded(uint8_t* data) {
if(!protocol_idteck_check_preamble(data, 0)) return false;
return true;
}
static bool protocol_idteck_decoder_feed_internal(bool polarity, uint32_t time, uint8_t* data) {
time += (IDTECK_US_PER_BIT / 2);
size_t bit_count = (time / IDTECK_US_PER_BIT);
bool result = false;
if(bit_count < IDTECK_ENCODED_BIT_SIZE) {
for(size_t i = 0; i < bit_count; i++) {
bit_lib_push_bit(data, IDTECK_ENCODED_DATA_SIZE, polarity);
if(protocol_idteck_can_be_decoded(data)) {
result = true;
break;
}
}
}
return result;
}
static void protocol_idteck_decoder_save(uint8_t* data_to, const uint8_t* data_from) {
bit_lib_copy_bits(data_to, 0, 64, data_from, 0);
}
bool protocol_idteck_decoder_feed(ProtocolIdteck* protocol, bool level, uint32_t duration) {
bool result = false;
if(duration > (IDTECK_US_PER_BIT / 2)) {
if(protocol_idteck_decoder_feed_internal(level, duration, protocol->encoded_data)) {
protocol_idteck_decoder_save(protocol->data, protocol->encoded_data);
FURI_LOG_D("Idteck", "Positive");
result = true;
return result;
}
if(protocol_idteck_decoder_feed_internal(
!level, duration, protocol->negative_encoded_data)) {
protocol_idteck_decoder_save(protocol->data, protocol->negative_encoded_data);
FURI_LOG_D("Idteck", "Negative");
result = true;
return result;
}
}
if(duration > (IDTECK_US_PER_BIT / 4)) {
// Try to decode wrong phase synced data
if(level) {
duration += 120;
} else {
if(duration > 120) {
duration -= 120;
}
}
if(protocol_idteck_decoder_feed_internal(
level, duration, protocol->corrupted_encoded_data)) {
protocol_idteck_decoder_save(protocol->data, protocol->corrupted_encoded_data);
FURI_LOG_D("Idteck", "Positive Corrupted");
result = true;
return result;
}
if(protocol_idteck_decoder_feed_internal(
!level, duration, protocol->corrupted_negative_encoded_data)) {
protocol_idteck_decoder_save(
protocol->data, protocol->corrupted_negative_encoded_data);
FURI_LOG_D("Idteck", "Negative Corrupted");
result = true;
return result;
}
}
return result;
};
bool protocol_idteck_encoder_start(ProtocolIdteck* protocol) {
memset(protocol->encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
*(uint32_t*)&protocol->encoded_data[0] = 0b01001011010101000100010001001001;
bit_lib_copy_bits(protocol->encoded_data, 32, 32, protocol->data, 32);
protocol->encoder.last_bit =
bit_lib_get_bit(protocol->encoded_data, IDTECK_ENCODED_BIT_SIZE - 1);
protocol->encoder.data_index = 0;
protocol->encoder.current_polarity = true;
protocol->encoder.pulse_phase = true;
protocol->encoder.bit_clock_index = 0;
return true;
};
LevelDuration protocol_idteck_encoder_yield(ProtocolIdteck* protocol) {
LevelDuration level_duration;
ProtocolIdteckEncoder* encoder = &protocol->encoder;
if(encoder->pulse_phase) {
level_duration = level_duration_make(encoder->current_polarity, 1);
encoder->pulse_phase = false;
} else {
level_duration = level_duration_make(!encoder->current_polarity, 1);
encoder->pulse_phase = true;
encoder->bit_clock_index++;
if(encoder->bit_clock_index >= IDTECK_ENCODER_PULSES_PER_BIT) {
encoder->bit_clock_index = 0;
bool current_bit = bit_lib_get_bit(protocol->encoded_data, encoder->data_index);
if(current_bit != encoder->last_bit) {
encoder->current_polarity = !encoder->current_polarity;
}
encoder->last_bit = current_bit;
bit_lib_increment_index(encoder->data_index, IDTECK_ENCODED_BIT_SIZE);
}
}
return level_duration;
};
// factory code
static uint32_t get_fc(const uint8_t* data) {
uint32_t fc = 0;
fc = bit_lib_get_bits_32(data, 0, 32);
return fc;
}
// card number
static uint32_t get_card(const uint8_t* data) {
uint32_t cn = 0;
cn = bit_lib_get_bits_32(data, 32, 32);
return cn;
}
void protocol_idteck_render_data_internal(ProtocolIdteck* protocol, FuriString* result, bool brief) {
const uint32_t fc = get_fc(protocol->data);
const uint32_t card = get_card(protocol->data);
if(brief) {
furi_string_printf(result, "FC: %08lX\r\nCard: %08lX", fc, card);
} else {
furi_string_printf(
result,
"FC: %08lX\r\n"
"Card: %08lX\r\n",
fc,
card);
}
}
void protocol_idteck_render_data(ProtocolIdteck* protocol, FuriString* result) {
protocol_idteck_render_data_internal(protocol, result, false);
}
void protocol_idteck_render_brief_data(ProtocolIdteck* protocol, FuriString* result) {
protocol_idteck_render_data_internal(protocol, result, true);
}
bool protocol_idteck_write_data(ProtocolIdteck* protocol, void* data) {
LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
bool result = false;
protocol_idteck_encoder_start(protocol);
if(request->write_type == LFRFIDWriteTypeT5577) {
request->t5577.block[0] = LFRFID_T5577_BITRATE_RF_32 | LFRFID_T5577_MODULATION_PSK1 |
(2 << LFRFID_T5577_MAXBLOCK_SHIFT);
request->t5577.block[1] = bit_lib_get_bits_32(protocol->encoded_data, 0, 32);
request->t5577.block[2] = bit_lib_get_bits_32(protocol->encoded_data, 32, 32);
request->t5577.blocks_to_write = 3;
result = true;
}
return result;
};
const ProtocolBase protocol_idteck = {
.name = "Idteck",
.manufacturer = "IDTECK",
.data_size = IDTECK_DECODED_DATA_SIZE,
.features = LFRFIDFeaturePSK,
.validate_count = 6,
.alloc = (ProtocolAlloc)protocol_idteck_alloc,
.free = (ProtocolFree)protocol_idteck_free,
.get_data = (ProtocolGetData)protocol_idteck_get_data,
.decoder =
{
.start = (ProtocolDecoderStart)protocol_idteck_decoder_start,
.feed = (ProtocolDecoderFeed)protocol_idteck_decoder_feed,
},
.encoder =
{
.start = (ProtocolEncoderStart)protocol_idteck_encoder_start,
.yield = (ProtocolEncoderYield)protocol_idteck_encoder_yield,
},
.render_data = (ProtocolRenderData)protocol_idteck_render_data,
.render_brief_data = (ProtocolRenderData)protocol_idteck_render_brief_data,
.write_data = (ProtocolWriteData)protocol_idteck_write_data,
};