mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-02 17:29:14 +00:00
427 lines
13 KiB
C
427 lines
13 KiB
C
#include <furi.h>
|
|
#include <toolbox/protocols/protocol.h>
|
|
#include <toolbox/manchester_decoder.h>
|
|
#include "lfrfid_protocols.h"
|
|
|
|
typedef uint64_t EM4100DecodedData;
|
|
typedef uint64_t EM4100Epilogue;
|
|
|
|
#define EM_HEADER_POS (55)
|
|
#define EM_HEADER_MASK (0x1FFLLU << EM_HEADER_POS)
|
|
|
|
#define EM_FIRST_ROW_POS (50)
|
|
|
|
#define EM_ROW_COUNT (10)
|
|
#define EM_COLUMN_COUNT (4)
|
|
#define EM_BITS_PER_ROW_COUNT (EM_COLUMN_COUNT + 1)
|
|
|
|
#define EM_COLUMN_POS (4)
|
|
#define EM_STOP_POS (0)
|
|
#define EM_STOP_MASK (0x1LLU << EM_STOP_POS)
|
|
|
|
#define EM_HEADER_AND_STOP_MASK (EM_HEADER_MASK | EM_STOP_MASK)
|
|
#define EM_HEADER_AND_STOP_DATA (EM_HEADER_MASK)
|
|
|
|
#define EM4100_DECODED_DATA_SIZE (5)
|
|
#define EM4100_ENCODED_DATA_SIZE (sizeof(EM4100DecodedData))
|
|
|
|
#define EM_READ_SHORT_TIME_BASE (256)
|
|
#define EM_READ_LONG_TIME_BASE (512)
|
|
#define EM_READ_JITTER_TIME_BASE (100)
|
|
|
|
#define EM_ENCODED_DATA_HEADER (0xFF80000000000000ULL)
|
|
|
|
typedef struct {
|
|
uint8_t data[EM4100_DECODED_DATA_SIZE];
|
|
|
|
EM4100DecodedData encoded_data;
|
|
EM4100Epilogue encoded_epilogue;
|
|
uint8_t encoded_data_index;
|
|
bool encoded_polarity;
|
|
|
|
ManchesterState decoder_manchester_state;
|
|
uint8_t clock_per_bit;
|
|
} ProtocolEM4100;
|
|
|
|
uint16_t protocol_em4100_get_time_divisor(ProtocolEM4100* proto) {
|
|
switch(proto->clock_per_bit) {
|
|
case 64:
|
|
return 1;
|
|
case 32:
|
|
return 2;
|
|
case 16:
|
|
return 4;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
uint32_t protocol_em4100_get_t5577_bitrate(ProtocolEM4100* proto) {
|
|
switch(proto->clock_per_bit) {
|
|
case 64:
|
|
return LFRFID_T5577_BITRATE_RF_64;
|
|
case 32:
|
|
return LFRFID_T5577_BITRATE_RF_32;
|
|
case 16:
|
|
return LFRFID_T5577_BITRATE_RF_16;
|
|
default:
|
|
return LFRFID_T5577_BITRATE_RF_64;
|
|
}
|
|
}
|
|
|
|
uint16_t protocol_em4100_get_short_time_low(ProtocolEM4100* proto) {
|
|
return EM_READ_SHORT_TIME_BASE / protocol_em4100_get_time_divisor(proto) -
|
|
EM_READ_JITTER_TIME_BASE / protocol_em4100_get_time_divisor(proto);
|
|
}
|
|
|
|
uint16_t protocol_em4100_get_short_time_high(ProtocolEM4100* proto) {
|
|
return EM_READ_SHORT_TIME_BASE / protocol_em4100_get_time_divisor(proto) +
|
|
EM_READ_JITTER_TIME_BASE / protocol_em4100_get_time_divisor(proto);
|
|
}
|
|
|
|
uint16_t protocol_em4100_get_long_time_low(ProtocolEM4100* proto) {
|
|
return EM_READ_LONG_TIME_BASE / protocol_em4100_get_time_divisor(proto) -
|
|
EM_READ_JITTER_TIME_BASE / protocol_em4100_get_time_divisor(proto);
|
|
}
|
|
|
|
uint16_t protocol_em4100_get_long_time_high(ProtocolEM4100* proto) {
|
|
return EM_READ_LONG_TIME_BASE / protocol_em4100_get_time_divisor(proto) +
|
|
EM_READ_JITTER_TIME_BASE / protocol_em4100_get_time_divisor(proto);
|
|
}
|
|
|
|
ProtocolEM4100* protocol_em4100_alloc(void) {
|
|
ProtocolEM4100* proto = malloc(sizeof(ProtocolEM4100));
|
|
proto->clock_per_bit = 64;
|
|
return (void*)proto;
|
|
};
|
|
|
|
ProtocolEM4100* protocol_em4100_16_alloc(void) {
|
|
ProtocolEM4100* proto = malloc(sizeof(ProtocolEM4100));
|
|
proto->clock_per_bit = 16;
|
|
return (void*)proto;
|
|
};
|
|
|
|
ProtocolEM4100* protocol_em4100_32_alloc(void) {
|
|
ProtocolEM4100* proto = malloc(sizeof(ProtocolEM4100));
|
|
proto->clock_per_bit = 32;
|
|
return (void*)proto;
|
|
};
|
|
|
|
void protocol_em4100_free(ProtocolEM4100* proto) {
|
|
free(proto);
|
|
};
|
|
|
|
uint8_t* protocol_em4100_get_data(ProtocolEM4100* proto) {
|
|
return proto->data;
|
|
};
|
|
|
|
static void em4100_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 >= EM4100_DECODED_DATA_SIZE);
|
|
furi_check(encoded_data_size >= EM4100_ENCODED_DATA_SIZE);
|
|
|
|
uint8_t decoded_data_index = 0;
|
|
EM4100DecodedData card_data = *((EM4100DecodedData*)(encoded_data));
|
|
|
|
// clean result
|
|
memset(decoded_data, 0, decoded_data_size);
|
|
|
|
// header
|
|
for(uint8_t i = 0; i < 9; i++) {
|
|
card_data = card_data << 1;
|
|
}
|
|
|
|
// nibbles
|
|
uint8_t value = 0;
|
|
for(uint8_t r = 0; r < EM_ROW_COUNT; r++) {
|
|
uint8_t nibble = 0;
|
|
for(uint8_t i = 0; i < 5; i++) {
|
|
if(i < 4) nibble = (nibble << 1) | (card_data & (1LLU << 63) ? 1 : 0);
|
|
card_data = card_data << 1;
|
|
}
|
|
value = (value << 4) | nibble;
|
|
if(r % 2) {
|
|
decoded_data[decoded_data_index] |= value;
|
|
decoded_data_index++;
|
|
value = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool em4100_can_be_decoded(
|
|
const uint8_t* encoded_data,
|
|
const uint8_t encoded_data_size,
|
|
const uint8_t* encoded_epilogue) {
|
|
furi_check(encoded_data_size >= EM4100_ENCODED_DATA_SIZE);
|
|
const EM4100DecodedData* card_data = (EM4100DecodedData*)encoded_data;
|
|
const EM4100Epilogue* epilogue = (EM4100Epilogue*)encoded_epilogue;
|
|
|
|
// check first 9 bytes on epilogue (to prevent conflict with Electra protocol)
|
|
if((*epilogue & EM_ENCODED_DATA_HEADER) != EM_ENCODED_DATA_HEADER) return false;
|
|
|
|
// check header and stop bit
|
|
if((*card_data & EM_HEADER_AND_STOP_MASK) != EM_HEADER_AND_STOP_DATA) return false;
|
|
|
|
// check row parity
|
|
for(uint8_t i = 0; i < EM_ROW_COUNT; i++) {
|
|
uint8_t parity_sum = 0;
|
|
|
|
for(uint8_t j = 0; j < EM_BITS_PER_ROW_COUNT; j++) {
|
|
parity_sum += (*card_data >> (EM_FIRST_ROW_POS - i * EM_BITS_PER_ROW_COUNT + j)) & 1;
|
|
}
|
|
|
|
if((parity_sum % 2)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// check columns parity
|
|
for(uint8_t i = 0; i < EM_COLUMN_COUNT; i++) {
|
|
uint8_t parity_sum = 0;
|
|
|
|
for(uint8_t j = 0; j < EM_ROW_COUNT + 1; j++) {
|
|
parity_sum += (*card_data >> (EM_COLUMN_POS - i + j * EM_BITS_PER_ROW_COUNT)) & 1;
|
|
}
|
|
|
|
if((parity_sum % 2)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void protocol_em4100_decoder_start(ProtocolEM4100* proto) {
|
|
memset(proto->data, 0, EM4100_DECODED_DATA_SIZE);
|
|
proto->encoded_data = 0;
|
|
manchester_advance(
|
|
proto->decoder_manchester_state,
|
|
ManchesterEventReset,
|
|
&proto->decoder_manchester_state,
|
|
NULL);
|
|
};
|
|
|
|
bool protocol_em4100_decoder_feed(ProtocolEM4100* proto, bool level, uint32_t duration) {
|
|
bool result = false;
|
|
|
|
ManchesterEvent event = ManchesterEventReset;
|
|
|
|
if(duration > protocol_em4100_get_short_time_low(proto) &&
|
|
duration < protocol_em4100_get_short_time_high(proto)) {
|
|
if(!level) {
|
|
event = ManchesterEventShortHigh;
|
|
} else {
|
|
event = ManchesterEventShortLow;
|
|
}
|
|
} else if(
|
|
duration > protocol_em4100_get_long_time_low(proto) &&
|
|
duration < protocol_em4100_get_long_time_high(proto)) {
|
|
if(!level) {
|
|
event = ManchesterEventLongHigh;
|
|
} else {
|
|
event = ManchesterEventLongLow;
|
|
}
|
|
}
|
|
|
|
if(event != ManchesterEventReset) {
|
|
bool data;
|
|
bool data_ok = manchester_advance(
|
|
proto->decoder_manchester_state, event, &proto->decoder_manchester_state, &data);
|
|
|
|
if(data_ok) {
|
|
bool carry = proto->encoded_epilogue >> 63 & 0b1;
|
|
|
|
proto->encoded_data = (proto->encoded_data << 1) | carry;
|
|
proto->encoded_epilogue = (proto->encoded_epilogue << 1) | data;
|
|
|
|
if(em4100_can_be_decoded(
|
|
(uint8_t*)&proto->encoded_data,
|
|
sizeof(EM4100DecodedData),
|
|
(uint8_t*)&proto->encoded_epilogue)) {
|
|
em4100_decode(
|
|
(uint8_t*)&proto->encoded_data,
|
|
sizeof(EM4100DecodedData),
|
|
proto->data,
|
|
EM4100_DECODED_DATA_SIZE);
|
|
result = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
static void em4100_write_nibble(bool low_nibble, uint8_t data, EM4100DecodedData* encoded_data) {
|
|
uint8_t parity_sum = 0;
|
|
uint8_t start = 0;
|
|
if(!low_nibble) start = 4;
|
|
|
|
for(int8_t i = (start + 3); i >= start; i--) {
|
|
parity_sum += (data >> i) & 1;
|
|
*encoded_data = (*encoded_data << 1) | ((data >> i) & 1);
|
|
}
|
|
|
|
*encoded_data = (*encoded_data << 1) | ((parity_sum % 2) & 1);
|
|
}
|
|
|
|
bool protocol_em4100_encoder_start(ProtocolEM4100* proto) {
|
|
// header
|
|
proto->encoded_data = 0b111111111;
|
|
|
|
// data
|
|
for(uint8_t i = 0; i < EM4100_DECODED_DATA_SIZE; i++) {
|
|
em4100_write_nibble(false, proto->data[i], &proto->encoded_data);
|
|
em4100_write_nibble(true, proto->data[i], &proto->encoded_data);
|
|
}
|
|
|
|
// column parity and stop bit
|
|
uint8_t parity_sum;
|
|
|
|
for(uint8_t c = 0; c < EM_COLUMN_COUNT; c++) {
|
|
parity_sum = 0;
|
|
for(uint8_t i = 1; i <= EM_ROW_COUNT; i++) {
|
|
uint8_t parity_bit = (proto->encoded_data >> (i * EM_BITS_PER_ROW_COUNT - 1)) & 1;
|
|
parity_sum += parity_bit;
|
|
}
|
|
proto->encoded_data = (proto->encoded_data << 1) | ((parity_sum % 2) & 1);
|
|
}
|
|
|
|
// stop bit
|
|
proto->encoded_data = (proto->encoded_data << 1) | 0;
|
|
|
|
proto->encoded_data_index = 0;
|
|
proto->encoded_polarity = true;
|
|
|
|
return true;
|
|
};
|
|
|
|
LevelDuration protocol_em4100_encoder_yield(ProtocolEM4100* proto) {
|
|
bool level = (proto->encoded_data >> (63 - proto->encoded_data_index)) & 1;
|
|
uint32_t duration = proto->clock_per_bit / 2;
|
|
|
|
if(proto->encoded_polarity) {
|
|
proto->encoded_polarity = false;
|
|
} else {
|
|
level = !level;
|
|
|
|
proto->encoded_polarity = true;
|
|
proto->encoded_data_index++;
|
|
if(proto->encoded_data_index >= 64) {
|
|
proto->encoded_data_index = 0;
|
|
}
|
|
}
|
|
|
|
return level_duration_make(level, duration);
|
|
};
|
|
|
|
bool protocol_em4100_write_data(ProtocolEM4100* protocol, void* data) {
|
|
LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
|
|
bool result = false;
|
|
|
|
// Correct protocol data by redecoding
|
|
protocol_em4100_encoder_start(protocol);
|
|
em4100_decode(
|
|
(uint8_t*)&protocol->encoded_data,
|
|
sizeof(EM4100DecodedData),
|
|
protocol->data,
|
|
EM4100_DECODED_DATA_SIZE);
|
|
|
|
protocol_em4100_encoder_start(protocol);
|
|
|
|
if(request->write_type == LFRFIDWriteTypeT5577) {
|
|
request->t5577.block[0] =
|
|
(LFRFID_T5577_MODULATION_MANCHESTER | protocol_em4100_get_t5577_bitrate(protocol) |
|
|
(2 << LFRFID_T5577_MAXBLOCK_SHIFT));
|
|
request->t5577.block[1] = protocol->encoded_data >> 32;
|
|
request->t5577.block[2] = protocol->encoded_data;
|
|
request->t5577.blocks_to_write = 3;
|
|
result = true;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
void protocol_em4100_render_data(ProtocolEM4100* protocol, FuriString* result) {
|
|
uint8_t* data = protocol->data;
|
|
furi_string_printf(
|
|
result,
|
|
"FC: %03u\n"
|
|
"Card: %05hu (RF/%hhu)",
|
|
data[2],
|
|
(uint16_t)((data[3] << 8) | (data[4])),
|
|
protocol->clock_per_bit);
|
|
};
|
|
|
|
const ProtocolBase protocol_em4100 = {
|
|
.name = "EM4100",
|
|
.manufacturer = "EM-Micro",
|
|
.data_size = EM4100_DECODED_DATA_SIZE,
|
|
.features = LFRFIDFeatureASK | LFRFIDFeaturePSK,
|
|
.validate_count = 3,
|
|
.alloc = (ProtocolAlloc)protocol_em4100_alloc,
|
|
.free = (ProtocolFree)protocol_em4100_free,
|
|
.get_data = (ProtocolGetData)protocol_em4100_get_data,
|
|
.decoder =
|
|
{
|
|
.start = (ProtocolDecoderStart)protocol_em4100_decoder_start,
|
|
.feed = (ProtocolDecoderFeed)protocol_em4100_decoder_feed,
|
|
},
|
|
.encoder =
|
|
{
|
|
.start = (ProtocolEncoderStart)protocol_em4100_encoder_start,
|
|
.yield = (ProtocolEncoderYield)protocol_em4100_encoder_yield,
|
|
},
|
|
.render_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.render_brief_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.write_data = (ProtocolWriteData)protocol_em4100_write_data,
|
|
};
|
|
|
|
const ProtocolBase protocol_em4100_32 = {
|
|
.name = "EM4100/32",
|
|
.manufacturer = "EM-Micro",
|
|
.data_size = EM4100_DECODED_DATA_SIZE,
|
|
.features = LFRFIDFeatureASK | LFRFIDFeaturePSK,
|
|
.validate_count = 3,
|
|
.alloc = (ProtocolAlloc)protocol_em4100_32_alloc,
|
|
.free = (ProtocolFree)protocol_em4100_free,
|
|
.get_data = (ProtocolGetData)protocol_em4100_get_data,
|
|
.decoder =
|
|
{
|
|
.start = (ProtocolDecoderStart)protocol_em4100_decoder_start,
|
|
.feed = (ProtocolDecoderFeed)protocol_em4100_decoder_feed,
|
|
},
|
|
.encoder =
|
|
{
|
|
.start = (ProtocolEncoderStart)protocol_em4100_encoder_start,
|
|
.yield = (ProtocolEncoderYield)protocol_em4100_encoder_yield,
|
|
},
|
|
.render_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.render_brief_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.write_data = (ProtocolWriteData)protocol_em4100_write_data,
|
|
};
|
|
|
|
const ProtocolBase protocol_em4100_16 = {
|
|
.name = "EM4100/16",
|
|
.manufacturer = "EM-Micro",
|
|
.data_size = EM4100_DECODED_DATA_SIZE,
|
|
.features = LFRFIDFeatureASK | LFRFIDFeaturePSK,
|
|
.validate_count = 3,
|
|
.alloc = (ProtocolAlloc)protocol_em4100_16_alloc,
|
|
.free = (ProtocolFree)protocol_em4100_free,
|
|
.get_data = (ProtocolGetData)protocol_em4100_get_data,
|
|
.decoder =
|
|
{
|
|
.start = (ProtocolDecoderStart)protocol_em4100_decoder_start,
|
|
.feed = (ProtocolDecoderFeed)protocol_em4100_decoder_feed,
|
|
},
|
|
.encoder =
|
|
{
|
|
.start = (ProtocolEncoderStart)protocol_em4100_encoder_start,
|
|
.yield = (ProtocolEncoderYield)protocol_em4100_encoder_yield,
|
|
},
|
|
.render_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.render_brief_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.write_data = (ProtocolWriteData)protocol_em4100_write_data,
|
|
};
|