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unleashed-firmware/lib/subghz/protocols/alutech_at_4n.c

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#include "alutech_at_4n.h"
#include "../blocks/const.h"
#include "../blocks/decoder.h"
#include "../blocks/encoder.h"
#include "../blocks/generic.h"
#include "../blocks/math.h"
#define TAG "SubGhzProtocoAlutech_at_4n"
#define SUBGHZ_NO_ALUTECH_AT_4N_RAINBOW_TABLE 0xFFFFFFFF
static const SubGhzBlockConst subghz_protocol_alutech_at_4n_const = {
.te_short = 400,
.te_long = 800,
.te_delta = 140,
.min_count_bit_for_found = 72,
};
struct SubGhzProtocolDecoderAlutech_at_4n {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
SubGhzBlockGeneric generic;
uint64_t data;
uint32_t crc;
uint16_t header_count;
const char* alutech_at_4n_rainbow_table_file_name;
};
struct SubGhzProtocolEncoderAlutech_at_4n {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
SubGhzBlockGeneric generic;
const char* alutech_at_4n_rainbow_table_file_name;
uint32_t crc;
};
typedef enum {
Alutech_at_4nDecoderStepReset = 0,
Alutech_at_4nDecoderStepCheckPreambula,
Alutech_at_4nDecoderStepSaveDuration,
Alutech_at_4nDecoderStepCheckDuration,
} Alutech_at_4nDecoderStep;
const SubGhzProtocolDecoder subghz_protocol_alutech_at_4n_decoder = {
.alloc = subghz_protocol_decoder_alutech_at_4n_alloc,
.free = subghz_protocol_decoder_alutech_at_4n_free,
.feed = subghz_protocol_decoder_alutech_at_4n_feed,
.reset = subghz_protocol_decoder_alutech_at_4n_reset,
.get_hash_data = subghz_protocol_decoder_alutech_at_4n_get_hash_data,
.serialize = subghz_protocol_decoder_alutech_at_4n_serialize,
.deserialize = subghz_protocol_decoder_alutech_at_4n_deserialize,
.get_string = subghz_protocol_decoder_alutech_at_4n_get_string,
};
const SubGhzProtocolEncoder subghz_protocol_alutech_at_4n_encoder = {
.alloc = subghz_protocol_encoder_alutech_at_4n_alloc,
.free = subghz_protocol_encoder_alutech_at_4n_free,
.deserialize = subghz_protocol_encoder_alutech_at_4n_deserialize,
.stop = subghz_protocol_encoder_alutech_at_4n_stop,
.yield = subghz_protocol_encoder_alutech_at_4n_yield,
};
const SubGhzProtocol subghz_protocol_alutech_at_4n = {
.name = SUBGHZ_PROTOCOL_ALUTECH_AT_4N_NAME,
.type = SubGhzProtocolTypeDynamic,
.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable |
SubGhzProtocolFlag_Load | SubGhzProtocolFlag_Save | SubGhzProtocolFlag_Send,
.decoder = &subghz_protocol_alutech_at_4n_decoder,
.encoder = &subghz_protocol_alutech_at_4n_encoder,
};
static uint8_t al_btn_temp_id;
static uint8_t al_btn_temp_id_original;
void alutech_set_btn(uint8_t b) {
al_btn_temp_id = b;
}
uint8_t alutech_get_original_btn() {
return al_btn_temp_id_original;
}
uint8_t alutech_get_custom_btn() {
return al_btn_temp_id;
}
void alutech_reset_original_btn() {
al_btn_temp_id_original = 0;
}
void* subghz_protocol_encoder_alutech_at_4n_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
SubGhzProtocolEncoderAlutech_at_4n* instance =
malloc(sizeof(SubGhzProtocolEncoderAlutech_at_4n));
instance->base.protocol = &subghz_protocol_alutech_at_4n;
instance->generic.protocol_name = instance->base.protocol->name;
instance->encoder.repeat = 10;
instance->encoder.size_upload = 512;
instance->encoder.upload = malloc(instance->encoder.size_upload * sizeof(LevelDuration));
instance->encoder.is_running = false;
instance->alutech_at_4n_rainbow_table_file_name =
subghz_environment_get_alutech_at_4n_rainbow_table_file_name(environment);
if(instance->alutech_at_4n_rainbow_table_file_name) {
FURI_LOG_I(
TAG, "Loading rainbow table from %s", instance->alutech_at_4n_rainbow_table_file_name);
}
return instance;
}
void subghz_protocol_encoder_alutech_at_4n_free(void* context) {
furi_assert(context);
SubGhzProtocolEncoderAlutech_at_4n* instance = context;
free(instance->encoder.upload);
free(instance);
}
void subghz_protocol_encoder_alutech_at_4n_stop(void* context) {
SubGhzProtocolEncoderAlutech_at_4n* instance = context;
instance->encoder.is_running = false;
}
LevelDuration subghz_protocol_encoder_alutech_at_4n_yield(void* context) {
SubGhzProtocolEncoderAlutech_at_4n* instance = context;
if(instance->encoder.repeat == 0 || !instance->encoder.is_running) {
instance->encoder.is_running = false;
return level_duration_reset();
}
LevelDuration ret = instance->encoder.upload[instance->encoder.front];
if(++instance->encoder.front == instance->encoder.size_upload) {
instance->encoder.repeat--;
instance->encoder.front = 0;
}
return ret;
}
/**
* Read bytes from rainbow table
* @param file_name Full path to rainbow table the file
* @param number_alutech_at_4n_magic_data number in the array
* @return alutech_at_4n_magic_data
*/
static uint32_t subghz_protocol_alutech_at_4n_get_magic_data_in_file(
const char* file_name,
uint8_t number_alutech_at_4n_magic_data) {
if(!strcmp(file_name, "")) return SUBGHZ_NO_ALUTECH_AT_4N_RAINBOW_TABLE;
uint8_t buffer[sizeof(uint32_t)] = {0};
uint32_t address = number_alutech_at_4n_magic_data * sizeof(uint32_t);
uint32_t alutech_at_4n_magic_data = 0;
if(subghz_keystore_raw_get_data(file_name, address, buffer, sizeof(uint32_t))) {
for(size_t i = 0; i < sizeof(uint32_t); i++) {
alutech_at_4n_magic_data = (alutech_at_4n_magic_data << 8) | buffer[i];
}
} else {
alutech_at_4n_magic_data = SUBGHZ_NO_ALUTECH_AT_4N_RAINBOW_TABLE;
}
return alutech_at_4n_magic_data;
}
static uint8_t subghz_protocol_alutech_at_4n_crc(uint64_t data) {
uint8_t* p = (uint8_t*)&data;
uint8_t crc = 0xff;
for(uint8_t y = 0; y < 8; y++) {
crc = crc ^ p[y];
for(uint8_t i = 0; i < 8; i++) {
if((crc & 0x80) != 0) {
crc <<= 1;
crc ^= 0x31;
} else {
crc <<= 1;
}
}
}
return crc;
}
static uint8_t subghz_protocol_alutech_at_4n_decrypt_data_crc(uint8_t data) {
uint8_t crc = data;
for(uint8_t i = 0; i < 8; i++) {
if((crc & 0x80) != 0) {
crc <<= 1;
crc ^= 0x31;
} else {
crc <<= 1;
}
}
return ~crc;
}
static uint64_t subghz_protocol_alutech_at_4n_decrypt(uint64_t data, const char* file_name) {
uint8_t* p = (uint8_t*)&data;
uint32_t data1 = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
uint32_t data2 = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
uint32_t data3 = 0;
uint32_t magic_data[] = {
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 0),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 1),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 2),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 3),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 4),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 5)};
uint32_t i = magic_data[0];
do {
data2 = data2 -
((magic_data[1] + (data1 << 4)) ^ ((magic_data[2] + (data1 >> 5)) ^ (data1 + i)));
data3 = data2 + i;
i += magic_data[3];
data1 =
data1 - ((magic_data[4] + (data2 << 4)) ^ ((magic_data[5] + (data2 >> 5)) ^ data3));
} while(i != 0);
p[0] = (uint8_t)(data1 >> 24);
p[1] = (uint8_t)(data1 >> 16);
p[3] = (uint8_t)data1;
p[4] = (uint8_t)(data2 >> 24);
p[5] = (uint8_t)(data2 >> 16);
p[2] = (uint8_t)(data1 >> 8);
p[6] = (uint8_t)(data2 >> 8);
p[7] = (uint8_t)data2;
return data;
}
static uint64_t subghz_protocol_alutech_at_4n_encrypt(uint64_t data, const char* file_name) {
uint8_t* p = (uint8_t*)&data;
uint32_t data1 = 0;
uint32_t data2 = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
uint32_t data3 = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
uint32_t magic_data[] = {
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 6),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 4),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 5),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 1),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 2),
subghz_protocol_alutech_at_4n_get_magic_data_in_file(file_name, 0)};
do {
data1 = data1 + magic_data[0];
data2 = data2 + ((magic_data[1] + (data3 << 4)) ^
((magic_data[2] + (data3 >> 5)) ^ (data1 + data3)));
data3 = data3 + ((magic_data[3] + (data2 << 4)) ^
((magic_data[4] + (data2 >> 5)) ^ (data1 + data2)));
} while(data1 != magic_data[5]);
p[0] = (uint8_t)(data2 >> 24);
p[1] = (uint8_t)(data2 >> 16);
p[3] = (uint8_t)data2;
p[4] = (uint8_t)(data3 >> 24);
p[5] = (uint8_t)(data3 >> 16);
p[2] = (uint8_t)(data2 >> 8);
p[6] = (uint8_t)(data3 >> 8);
p[7] = (uint8_t)data3;
return data;
}
static bool subghz_protocol_alutech_at_4n_gen_data(
SubGhzProtocolEncoderAlutech_at_4n* instance,
uint8_t btn) {
uint64_t data = subghz_protocol_blocks_reverse_key(instance->generic.data, 64);
data = subghz_protocol_alutech_at_4n_decrypt(
data, instance->alutech_at_4n_rainbow_table_file_name);
uint8_t crc = data >> 56;
if(crc == subghz_protocol_alutech_at_4n_decrypt_data_crc((uint8_t)((data >> 8) & 0xFF))) {
instance->generic.btn = (uint8_t)data & 0xFF;
instance->generic.cnt = (uint16_t)(data >> 8) & 0xFFFF;
instance->generic.serial = (uint32_t)(data >> 24) & 0xFFFFFFFF;
}
if(instance->generic.cnt < 0xFFFF) {
if((instance->generic.cnt + furi_hal_subghz_get_rolling_counter_mult()) >= 0xFFFF) {
instance->generic.cnt = 0;
} else {
instance->generic.cnt += furi_hal_subghz_get_rolling_counter_mult();
}
} else if(instance->generic.cnt >= 0xFFFF) {
instance->generic.cnt = 0;
}
crc = subghz_protocol_alutech_at_4n_decrypt_data_crc((uint8_t)(instance->generic.cnt & 0xFF));
data = (uint64_t)crc << 56 | (uint64_t)instance->generic.serial << 24 |
(uint32_t)instance->generic.cnt << 8 | btn;
data = subghz_protocol_alutech_at_4n_encrypt(
data, instance->alutech_at_4n_rainbow_table_file_name);
crc = subghz_protocol_alutech_at_4n_crc(data);
instance->generic.data = subghz_protocol_blocks_reverse_key(data, 64);
instance->crc = subghz_protocol_blocks_reverse_key(crc, 8);
return true;
}
bool subghz_protocol_alutech_at_4n_create_data(
void* context,
FlipperFormat* flipper_format,
uint32_t serial,
uint8_t btn,
uint16_t cnt,
SubGhzRadioPreset* preset) {
furi_assert(context);
SubGhzProtocolEncoderAlutech_at_4n* instance = context;
instance->generic.serial = serial;
instance->generic.cnt = cnt;
instance->generic.data_count_bit = 72;
bool res = subghz_protocol_alutech_at_4n_gen_data(instance, btn);
if(res) {
res = subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
if((res == SubGhzProtocolStatusOk) &&
!flipper_format_write_uint32(flipper_format, "CRC", &instance->crc, 1)) {
FURI_LOG_E(TAG, "Unable to add CRC");
res = false;
}
}
return res;
}
/**
* Generating an upload from data.
* @param instance Pointer to a SubGhzProtocolEncoderAlutech instance
* @return true On success
*/
static bool subghz_protocol_encoder_alutech_at_4n_get_upload(
SubGhzProtocolEncoderAlutech_at_4n* instance,
uint8_t btn) {
furi_assert(instance);
// Save original button for later use
if(al_btn_temp_id_original == 0) {
al_btn_temp_id_original = btn;
}
// Set custom button
if(al_btn_temp_id == 1) {
switch(al_btn_temp_id_original) {
case 0x11:
btn = 0x22;
break;
case 0x22:
btn = 0x11;
break;
case 0xFF:
btn = 0x11;
break;
case 0x44:
btn = 0x11;
break;
case 0x33:
btn = 0x11;
break;
default:
break;
}
}
if(al_btn_temp_id == 2) {
switch(al_btn_temp_id_original) {
case 0x11:
btn = 0x44;
break;
case 0x22:
btn = 0x44;
break;
case 0xFF:
btn = 0x44;
break;
case 0x44:
btn = 0xFF;
break;
case 0x33:
btn = 0x44;
break;
default:
break;
}
}
if(al_btn_temp_id == 3) {
switch(al_btn_temp_id_original) {
case 0x11:
btn = 0x33;
break;
case 0x22:
btn = 0x33;
break;
case 0xFF:
btn = 0x33;
break;
case 0x44:
btn = 0x33;
break;
case 0x33:
btn = 0x22;
break;
default:
break;
}
}
if(al_btn_temp_id == 4) {
switch(al_btn_temp_id_original) {
case 0x11:
btn = 0xFF;
break;
case 0x22:
btn = 0xFF;
break;
case 0xFF:
btn = 0x22;
break;
case 0x44:
btn = 0x22;
break;
case 0x33:
btn = 0xFF;
break;
default:
break;
}
}
if((al_btn_temp_id == 0) && (al_btn_temp_id_original != 0)) {
btn = al_btn_temp_id_original;
}
//gen new key
if(subghz_protocol_alutech_at_4n_gen_data(instance, btn)) {
//ToDo if you need to add a callback to automatically update the data on the display
} else {
return false;
}
size_t index = 0;
// Send preambula
for(uint8_t i = 0; i < 12; ++i) {
instance->encoder.upload[index++] =
level_duration_make(true, (uint32_t)subghz_protocol_alutech_at_4n_const.te_short); // 1
instance->encoder.upload[index++] = level_duration_make(
false, (uint32_t)subghz_protocol_alutech_at_4n_const.te_short); // 0
}
instance->encoder.upload[index - 1].duration +=
(uint32_t)subghz_protocol_alutech_at_4n_const.te_short * 9;
// Send key data
for(uint8_t i = 64; i > 0; --i) {
if(bit_read(instance->generic.data, i - 1)) {
//1
instance->encoder.upload[index++] =
level_duration_make(true, (uint32_t)subghz_protocol_alutech_at_4n_const.te_short);
instance->encoder.upload[index++] =
level_duration_make(false, (uint32_t)subghz_protocol_alutech_at_4n_const.te_long);
} else {
//0
instance->encoder.upload[index++] =
level_duration_make(true, (uint32_t)subghz_protocol_alutech_at_4n_const.te_long);
instance->encoder.upload[index++] =
level_duration_make(false, (uint32_t)subghz_protocol_alutech_at_4n_const.te_short);
}
}
// Send crc
for(uint8_t i = 8; i > 0; --i) {
if(bit_read(instance->crc, i - 1)) {
//1
instance->encoder.upload[index++] =
level_duration_make(true, (uint32_t)subghz_protocol_alutech_at_4n_const.te_short);
instance->encoder.upload[index++] =
level_duration_make(false, (uint32_t)subghz_protocol_alutech_at_4n_const.te_long);
} else {
//0
instance->encoder.upload[index++] =
level_duration_make(true, (uint32_t)subghz_protocol_alutech_at_4n_const.te_long);
instance->encoder.upload[index++] =
level_duration_make(false, (uint32_t)subghz_protocol_alutech_at_4n_const.te_short);
}
}
// Inter-frame silence
instance->encoder.upload[index - 1].duration +=
(uint32_t)subghz_protocol_alutech_at_4n_const.te_long * 20;
size_t size_upload = index;
if(size_upload > instance->encoder.size_upload) {
FURI_LOG_E(TAG, "Size upload exceeds allocated encoder buffer.");
return false;
} else {
instance->encoder.size_upload = size_upload;
}
return true;
}
SubGhzProtocolStatus subghz_protocol_encoder_alutech_at_4n_deserialize(
void* context,
FlipperFormat* flipper_format) {
furi_assert(context);
SubGhzProtocolEncoderAlutech_at_4n* instance = context;
SubGhzProtocolStatus res = SubGhzProtocolStatusError;
do {
if(SubGhzProtocolStatusOk !=
subghz_block_generic_deserialize(&instance->generic, flipper_format)) {
FURI_LOG_E(TAG, "Deserialize error");
break;
}
//optional parameter parameter
flipper_format_read_uint32(
flipper_format, "Repeat", (uint32_t*)&instance->encoder.repeat, 1);
subghz_protocol_encoder_alutech_at_4n_get_upload(instance, instance->generic.btn);
if(!flipper_format_rewind(flipper_format)) {
FURI_LOG_E(TAG, "Rewind error");
break;
}
uint8_t key_data[sizeof(uint64_t)] = {0};
for(size_t i = 0; i < sizeof(uint64_t); i++) {
key_data[sizeof(uint64_t) - i - 1] = (instance->generic.data >> i * 8) & 0xFF;
}
if(!flipper_format_update_hex(flipper_format, "Key", key_data, sizeof(uint64_t))) {
FURI_LOG_E(TAG, "Unable to add Key");
break;
}
if(!flipper_format_rewind(flipper_format)) {
FURI_LOG_E(TAG, "Rewind error");
break;
}
if(!flipper_format_update_uint32(flipper_format, "CRC", &instance->crc, 1)) {
FURI_LOG_E(TAG, "Unable to add CRC");
break;
}
instance->encoder.is_running = true;
res = SubGhzProtocolStatusOk;
} while(false);
return res;
}
void* subghz_protocol_decoder_alutech_at_4n_alloc(SubGhzEnvironment* environment) {
SubGhzProtocolDecoderAlutech_at_4n* instance =
malloc(sizeof(SubGhzProtocolDecoderAlutech_at_4n));
instance->base.protocol = &subghz_protocol_alutech_at_4n;
instance->generic.protocol_name = instance->base.protocol->name;
instance->alutech_at_4n_rainbow_table_file_name =
subghz_environment_get_alutech_at_4n_rainbow_table_file_name(environment);
if(instance->alutech_at_4n_rainbow_table_file_name) {
FURI_LOG_I(
TAG, "Loading rainbow table from %s", instance->alutech_at_4n_rainbow_table_file_name);
}
return instance;
}
void subghz_protocol_decoder_alutech_at_4n_free(void* context) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
instance->alutech_at_4n_rainbow_table_file_name = NULL;
free(instance);
}
void subghz_protocol_decoder_alutech_at_4n_reset(void* context) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
instance->decoder.parser_step = Alutech_at_4nDecoderStepReset;
}
void subghz_protocol_decoder_alutech_at_4n_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
switch(instance->decoder.parser_step) {
case Alutech_at_4nDecoderStepReset:
if((level) && DURATION_DIFF(duration, subghz_protocol_alutech_at_4n_const.te_short) <
subghz_protocol_alutech_at_4n_const.te_delta) {
instance->decoder.parser_step = Alutech_at_4nDecoderStepCheckPreambula;
instance->header_count++;
}
break;
case Alutech_at_4nDecoderStepCheckPreambula:
if((!level) && (DURATION_DIFF(duration, subghz_protocol_alutech_at_4n_const.te_short) <
subghz_protocol_alutech_at_4n_const.te_delta)) {
instance->decoder.parser_step = Alutech_at_4nDecoderStepReset;
break;
}
if((instance->header_count > 2) &&
(DURATION_DIFF(duration, subghz_protocol_alutech_at_4n_const.te_short * 10) <
subghz_protocol_alutech_at_4n_const.te_delta * 10)) {
// Found header
instance->decoder.parser_step = Alutech_at_4nDecoderStepSaveDuration;
instance->decoder.decode_data = 0;
instance->data = 0;
instance->decoder.decode_count_bit = 0;
} else {
instance->decoder.parser_step = Alutech_at_4nDecoderStepReset;
instance->header_count = 0;
}
break;
case Alutech_at_4nDecoderStepSaveDuration:
if(level) {
instance->decoder.te_last = duration;
instance->decoder.parser_step = Alutech_at_4nDecoderStepCheckDuration;
}
break;
case Alutech_at_4nDecoderStepCheckDuration:
if(!level) {
if(duration >= ((uint32_t)subghz_protocol_alutech_at_4n_const.te_short * 2 +
subghz_protocol_alutech_at_4n_const.te_delta)) {
//add last bit
if(DURATION_DIFF(
instance->decoder.te_last, subghz_protocol_alutech_at_4n_const.te_short) <
subghz_protocol_alutech_at_4n_const.te_delta) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
} else if(
DURATION_DIFF(
instance->decoder.te_last, subghz_protocol_alutech_at_4n_const.te_long) <
subghz_protocol_alutech_at_4n_const.te_delta * 2) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
}
// Found end TX
instance->decoder.parser_step = Alutech_at_4nDecoderStepReset;
if(instance->decoder.decode_count_bit ==
subghz_protocol_alutech_at_4n_const.min_count_bit_for_found) {
if(instance->generic.data != instance->data) {
instance->generic.data = instance->data;
instance->generic.data_count_bit = instance->decoder.decode_count_bit;
instance->crc = instance->decoder.decode_data;
if(instance->base.callback)
instance->base.callback(&instance->base, instance->base.context);
}
instance->decoder.decode_data = 0;
instance->data = 0;
instance->decoder.decode_count_bit = 0;
instance->header_count = 0;
}
break;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, subghz_protocol_alutech_at_4n_const.te_short) <
subghz_protocol_alutech_at_4n_const.te_delta) &&
(DURATION_DIFF(duration, subghz_protocol_alutech_at_4n_const.te_long) <
subghz_protocol_alutech_at_4n_const.te_delta * 2)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
if(instance->decoder.decode_count_bit == 64) {
instance->data = instance->decoder.decode_data;
instance->decoder.decode_data = 0;
}
instance->decoder.parser_step = Alutech_at_4nDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, subghz_protocol_alutech_at_4n_const.te_long) <
subghz_protocol_alutech_at_4n_const.te_delta * 2) &&
(DURATION_DIFF(duration, subghz_protocol_alutech_at_4n_const.te_short) <
subghz_protocol_alutech_at_4n_const.te_delta)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
if(instance->decoder.decode_count_bit == 64) {
instance->data = instance->decoder.decode_data;
instance->decoder.decode_data = 0;
}
instance->decoder.parser_step = Alutech_at_4nDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = Alutech_at_4nDecoderStepReset;
instance->header_count = 0;
}
} else {
instance->decoder.parser_step = Alutech_at_4nDecoderStepReset;
instance->header_count = 0;
}
break;
}
}
/**
* Analysis of received data
* @param instance Pointer to a SubGhzBlockGeneric* instance
* @param file_name Full path to rainbow table the file
*/
static void subghz_protocol_alutech_at_4n_remote_controller(
SubGhzBlockGeneric* instance,
uint8_t crc,
const char* file_name) {
/**
* Message format 72bit LSB first
* data crc
* XXXXXXXXXXXXXXXX CC
*
* For analysis, you need to turn the package MSB
* in decoded messages format
*
* crc1 serial cnt key
* cc SSSSSSSS XXxx BB
*
* crc1 is calculated from the lower part of cnt
* key 1=0xff, 2=0x11, 3=0x22, 4=0x33, 5=0x44
*
*/
bool status = false;
uint64_t data = subghz_protocol_blocks_reverse_key(instance->data, 64);
crc = subghz_protocol_blocks_reverse_key(crc, 8);
if(crc == subghz_protocol_alutech_at_4n_crc(data)) {
data = subghz_protocol_alutech_at_4n_decrypt(data, file_name);
status = true;
}
if(status && ((uint8_t)(data >> 56) ==
subghz_protocol_alutech_at_4n_decrypt_data_crc((uint8_t)((data >> 8) & 0xFF)))) {
instance->btn = (uint8_t)data & 0xFF;
instance->cnt = (uint16_t)(data >> 8) & 0xFFFF;
instance->serial = (uint32_t)(data >> 24) & 0xFFFFFFFF;
}
if(!status) {
instance->btn = 0;
instance->cnt = 0;
instance->serial = 0;
}
// Save original button for later use
if(al_btn_temp_id_original == 0) {
al_btn_temp_id_original = instance->btn;
}
}
uint8_t subghz_protocol_decoder_alutech_at_4n_get_hash_data(void* context) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
return (uint8_t)instance->crc;
}
SubGhzProtocolStatus subghz_protocol_decoder_alutech_at_4n_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzRadioPreset* preset) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
SubGhzProtocolStatus res =
subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
if((res == SubGhzProtocolStatusOk) &&
!flipper_format_write_uint32(flipper_format, "CRC", &instance->crc, 1)) {
FURI_LOG_E(TAG, "Unable to add CRC");
res = SubGhzProtocolStatusErrorParserOthers;
}
return res;
}
SubGhzProtocolStatus subghz_protocol_decoder_alutech_at_4n_deserialize(
void* context,
FlipperFormat* flipper_format) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
SubGhzProtocolStatus ret = SubGhzProtocolStatusError;
do {
ret = subghz_block_generic_deserialize_check_count_bit(
&instance->generic,
flipper_format,
subghz_protocol_alutech_at_4n_const.min_count_bit_for_found);
if(ret != SubGhzProtocolStatusOk) {
break;
}
if(!flipper_format_rewind(flipper_format)) {
FURI_LOG_E(TAG, "Rewind error");
ret = SubGhzProtocolStatusErrorParserOthers;
break;
}
if(!flipper_format_read_uint32(flipper_format, "CRC", (uint32_t*)&instance->crc, 1)) {
FURI_LOG_E(TAG, "Missing CRC");
ret = SubGhzProtocolStatusErrorParserOthers;
break;
}
} while(false);
return ret;
}
void subghz_protocol_decoder_alutech_at_4n_get_string(void* context, FuriString* output) {
furi_assert(context);
SubGhzProtocolDecoderAlutech_at_4n* instance = context;
subghz_protocol_alutech_at_4n_remote_controller(
&instance->generic, instance->crc, instance->alutech_at_4n_rainbow_table_file_name);
uint32_t code_found_hi = instance->generic.data >> 32;
uint32_t code_found_lo = instance->generic.data & 0x00000000ffffffff;
furi_string_cat_printf(
output,
"%s\r\n"
"Key:0x%08lX%08lX\nCRC:%02X %dbit\r\n"
"Sn:0x%08lX Btn:0x%01X\r\n"
"Cnt:0x%04lX\r\n",
instance->generic.protocol_name,
code_found_hi,
code_found_lo,
(uint8_t)instance->crc,
instance->generic.data_count_bit,
instance->generic.serial,
instance->generic.btn,
instance->generic.cnt);
}
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