flipperzero-firmware/lib/lfrfid/protocols/protocol_awid.c
Luke Williams 50dc2d7389
36-bit AWID (L11601 Lenel) (#1838)
* 36-bit AWID
* Rfid: correct vendor name AWIG -> AWID

Co-authored-by: Sergey Gavrilov <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>
2022-10-13 01:31:54 +09:00

255 lines
9.2 KiB
C

#include <furi.h>
#include <toolbox/protocols/protocol.h>
#include <lfrfid/tools/fsk_demod.h>
#include <lfrfid/tools/fsk_osc.h>
#include <lfrfid/tools/bit_lib.h>
#include "lfrfid_protocols.h"
#define JITTER_TIME (20)
#define MIN_TIME (64 - JITTER_TIME)
#define MAX_TIME (80 + JITTER_TIME)
#define AWID_DECODED_DATA_SIZE (9)
#define AWID_ENCODED_BIT_SIZE (96)
#define AWID_ENCODED_DATA_SIZE (((AWID_ENCODED_BIT_SIZE) / 8) + 1)
#define AWID_ENCODED_DATA_LAST (AWID_ENCODED_DATA_SIZE - 1)
typedef struct {
FSKDemod* fsk_demod;
} ProtocolAwidDecoder;
typedef struct {
FSKOsc* fsk_osc;
uint8_t encoded_index;
} ProtocolAwidEncoder;
typedef struct {
ProtocolAwidDecoder decoder;
ProtocolAwidEncoder encoder;
uint8_t encoded_data[AWID_ENCODED_DATA_SIZE];
uint8_t data[AWID_DECODED_DATA_SIZE];
} ProtocolAwid;
ProtocolAwid* protocol_awid_alloc(void) {
ProtocolAwid* protocol = malloc(sizeof(ProtocolAwid));
protocol->decoder.fsk_demod = fsk_demod_alloc(MIN_TIME, 6, MAX_TIME, 5);
protocol->encoder.fsk_osc = fsk_osc_alloc(8, 10, 50);
return protocol;
};
void protocol_awid_free(ProtocolAwid* protocol) {
fsk_demod_free(protocol->decoder.fsk_demod);
fsk_osc_free(protocol->encoder.fsk_osc);
free(protocol);
};
uint8_t* protocol_awid_get_data(ProtocolAwid* protocol) {
return protocol->data;
};
void protocol_awid_decoder_start(ProtocolAwid* protocol) {
memset(protocol->encoded_data, 0, AWID_ENCODED_DATA_SIZE);
};
static bool protocol_awid_can_be_decoded(uint8_t* data) {
bool result = false;
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
// -----------------------------------------------------------------------------
// 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
// preamble bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
// |---26 bit---| |-----117----||-------------142-------------|
// b = format bit len, o = odd parity of last 3 bits
// f = facility code, c = card number
// w = wiegand parity
// (26 bit format shown)
do {
// check preamble and spacing
if(data[0] != 0b00000001 || data[AWID_ENCODED_DATA_LAST] != 0b00000001) break;
// check odd parity for every 4 bits starting from the second byte
bool parity_error = bit_lib_test_parity(data, 8, 88, BitLibParityOdd, 4);
if(parity_error) break;
bit_lib_remove_bit_every_nth(data, 8, 88, 4);
// Avoid detection for invalid formats
uint8_t len = bit_lib_get_bits(data, 8, 8);
if(len != 26 && len != 50 && len != 37 && len != 34 && len != 36) break;
result = true;
} while(false);
return result;
}
static void protocol_awid_decode(uint8_t* encoded_data, uint8_t* decoded_data) {
bit_lib_copy_bits(decoded_data, 0, 66, encoded_data, 8);
}
bool protocol_awid_decoder_feed(ProtocolAwid* protocol, bool level, uint32_t duration) {
bool value;
uint32_t count;
bool result = false;
fsk_demod_feed(protocol->decoder.fsk_demod, level, duration, &value, &count);
if(count > 0) {
for(size_t i = 0; i < count; i++) {
bit_lib_push_bit(protocol->encoded_data, AWID_ENCODED_DATA_SIZE, value);
if(protocol_awid_can_be_decoded(protocol->encoded_data)) {
protocol_awid_decode(protocol->encoded_data, protocol->data);
result = true;
break;
}
}
}
return result;
};
static void protocol_awid_encode(const uint8_t* decoded_data, uint8_t* encoded_data) {
memset(encoded_data, 0, AWID_ENCODED_DATA_SIZE);
// preamble
bit_lib_set_bits(encoded_data, 0, 0b00000001, 8);
for(size_t i = 0; i < 88 / 4; i++) {
uint8_t value = bit_lib_get_bits(decoded_data, i * 3, 3) << 1;
value |= bit_lib_test_parity_32(value, BitLibParityOdd);
bit_lib_set_bits(encoded_data, 8 + i * 4, value, 4);
}
};
bool protocol_awid_encoder_start(ProtocolAwid* protocol) {
protocol_awid_encode(protocol->data, (uint8_t*)protocol->encoded_data);
protocol->encoder.encoded_index = 0;
fsk_osc_reset(protocol->encoder.fsk_osc);
return true;
};
LevelDuration protocol_awid_encoder_yield(ProtocolAwid* protocol) {
bool level;
uint32_t duration;
bool bit = bit_lib_get_bit(protocol->encoded_data, protocol->encoder.encoded_index);
bool advance = fsk_osc_next_half(protocol->encoder.fsk_osc, bit, &level, &duration);
if(advance) {
bit_lib_increment_index(protocol->encoder.encoded_index, AWID_ENCODED_BIT_SIZE);
}
return level_duration_make(level, duration);
};
void protocol_awid_render_data(ProtocolAwid* protocol, FuriString* result) {
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
// ------------------------------------------------------------------------
// 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
// bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// |26 bit| |-117--| |-----142------|
// b = format bit len, o = odd parity of last 3 bits
// f = facility code, c = card number
// w = wiegand parity
// (26 bit format shown)
uint8_t* decoded_data = protocol->data;
uint8_t format_length = decoded_data[0];
furi_string_cat_printf(result, "Format: %d\r\n", format_length);
if(format_length == 26) {
uint8_t facility;
bit_lib_copy_bits(&facility, 0, 8, decoded_data, 9);
uint16_t card_id;
bit_lib_copy_bits((uint8_t*)&card_id, 8, 8, decoded_data, 17);
bit_lib_copy_bits((uint8_t*)&card_id, 0, 8, decoded_data, 25);
furi_string_cat_printf(result, "Facility: %d\r\n", facility);
furi_string_cat_printf(result, "Card: %d", card_id);
} else {
// print 66 bits as hex
furi_string_cat_printf(result, "Data: ");
for(size_t i = 0; i < AWID_DECODED_DATA_SIZE; i++) {
furi_string_cat_printf(result, "%02X", decoded_data[i]);
}
}
};
void protocol_awid_render_brief_data(ProtocolAwid* protocol, FuriString* result) {
uint8_t* decoded_data = protocol->data;
uint8_t format_length = decoded_data[0];
furi_string_cat_printf(result, "Format: %d\r\n", format_length);
if(format_length == 26) {
uint8_t facility;
bit_lib_copy_bits(&facility, 0, 8, decoded_data, 9);
uint16_t card_id;
bit_lib_copy_bits((uint8_t*)&card_id, 8, 8, decoded_data, 17);
bit_lib_copy_bits((uint8_t*)&card_id, 0, 8, decoded_data, 25);
furi_string_cat_printf(result, "ID: %03u,%05u", facility, card_id);
} else {
furi_string_cat_printf(result, "Data: unknown");
}
};
bool protocol_awid_write_data(ProtocolAwid* protocol, void* data) {
LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
bool result = false;
// Fix incorrect length byte
if(protocol->data[0] != 26 && protocol->data[0] != 50 && protocol->data[0] != 37 &&
protocol->data[0] != 34 && protocol->data[0] != 36 ) {
protocol->data[0] = 26;
}
// Correct protocol data by redecoding
protocol_awid_encode(protocol->data, (uint8_t*)protocol->encoded_data);
bit_lib_remove_bit_every_nth((uint8_t*)protocol->encoded_data, 8, 88, 4);
protocol_awid_decode(protocol->encoded_data, protocol->data);
protocol_awid_encode(protocol->data, (uint8_t*)protocol->encoded_data);
if(request->write_type == LFRFIDWriteTypeT5577) {
request->t5577.block[0] = LFRFID_T5577_MODULATION_FSK2a | LFRFID_T5577_BITRATE_RF_50 |
(3 << 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.block[3] = bit_lib_get_bits_32(protocol->encoded_data, 64, 32);
request->t5577.blocks_to_write = 4;
result = true;
}
return result;
};
const ProtocolBase protocol_awid = {
.name = "AWID",
.manufacturer = "AWID",
.data_size = AWID_DECODED_DATA_SIZE,
.features = LFRFIDFeatureASK,
.validate_count = 3,
.alloc = (ProtocolAlloc)protocol_awid_alloc,
.free = (ProtocolFree)protocol_awid_free,
.get_data = (ProtocolGetData)protocol_awid_get_data,
.decoder =
{
.start = (ProtocolDecoderStart)protocol_awid_decoder_start,
.feed = (ProtocolDecoderFeed)protocol_awid_decoder_feed,
},
.encoder =
{
.start = (ProtocolEncoderStart)protocol_awid_encoder_start,
.yield = (ProtocolEncoderYield)protocol_awid_encoder_yield,
},
.render_data = (ProtocolRenderData)protocol_awid_render_data,
.render_brief_data = (ProtocolRenderData)protocol_awid_render_brief_data,
.write_data = (ProtocolWriteData)protocol_awid_write_data,
};