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unleashed-firmware/lib/subghz/protocols/chamberlain_code.c
Max Lapan 3360f818a1
Subghz: Adding checks for get_upload functions (#1704) 
* Adding checks for get_upload functions
  Almost in every protocol, function which generates upload might fail and return false.
  But we don't check this result, which might end up sending random memory contents to the air.
* Format sources and fix crash on ivalid bit count in chamberlain

Co-authored-by: あく <alleteam@gmail.com>
2022-09-20 14:29:10 +09:00

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#include "chamberlain_code.h"
#include "../blocks/const.h"
#include "../blocks/decoder.h"
#include "../blocks/encoder.h"
#include "../blocks/generic.h"
#include "../blocks/math.h"
#define TAG "SubGhzProtocolChamb_Code"
#define CHAMBERLAIN_CODE_BIT_STOP 0b0001
#define CHAMBERLAIN_CODE_BIT_1 0b0011
#define CHAMBERLAIN_CODE_BIT_0 0b0111
#define CHAMBERLAIN_7_CODE_MASK 0xF000000FF0F
#define CHAMBERLAIN_8_CODE_MASK 0xF00000F00F
#define CHAMBERLAIN_9_CODE_MASK 0xF000000000F
#define CHAMBERLAIN_7_CODE_MASK_CHECK 0x10000001101
#define CHAMBERLAIN_8_CODE_MASK_CHECK 0x1000001001
#define CHAMBERLAIN_9_CODE_MASK_CHECK 0x10000000001
#define CHAMBERLAIN_7_CODE_DIP_PATTERN "%c%c%c%c%c%c%c"
#define CHAMBERLAIN_7_CODE_DATA_TO_DIP(dip) \
(dip & 0x0040 ? '1' : '0'), (dip & 0x0020 ? '1' : '0'), (dip & 0x0010 ? '1' : '0'), \
(dip & 0x0008 ? '1' : '0'), (dip & 0x0004 ? '1' : '0'), (dip & 0x0002 ? '1' : '0'), \
(dip & 0x0001 ? '1' : '0')
#define CHAMBERLAIN_8_CODE_DIP_PATTERN "%c%c%c%c%cx%c%c"
#define CHAMBERLAIN_8_CODE_DATA_TO_DIP(dip) \
(dip & 0x0080 ? '1' : '0'), (dip & 0x0040 ? '1' : '0'), (dip & 0x0020 ? '1' : '0'), \
(dip & 0x0010 ? '1' : '0'), (dip & 0x0008 ? '1' : '0'), (dip & 0x0001 ? '1' : '0'), \
(dip & 0x0002 ? '1' : '0')
#define CHAMBERLAIN_9_CODE_DIP_PATTERN "%c%c%c%c%c%c%c%c%c"
#define CHAMBERLAIN_9_CODE_DATA_TO_DIP(dip) \
(dip & 0x0100 ? '1' : '0'), (dip & 0x0080 ? '1' : '0'), (dip & 0x0040 ? '1' : '0'), \
(dip & 0x0020 ? '1' : '0'), (dip & 0x0010 ? '1' : '0'), (dip & 0x0008 ? '1' : '0'), \
(dip & 0x0001 ? '1' : '0'), (dip & 0x0002 ? '1' : '0'), (dip & 0x0004 ? '1' : '0')
static const SubGhzBlockConst subghz_protocol_chamb_code_const = {
.te_short = 1000,
.te_long = 3000,
.te_delta = 200,
.min_count_bit_for_found = 10,
};
struct SubGhzProtocolDecoderChamb_Code {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
SubGhzBlockGeneric generic;
};
struct SubGhzProtocolEncoderChamb_Code {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
SubGhzBlockGeneric generic;
};
typedef enum {
Chamb_CodeDecoderStepReset = 0,
Chamb_CodeDecoderStepFoundStartBit,
Chamb_CodeDecoderStepSaveDuration,
Chamb_CodeDecoderStepCheckDuration,
} Chamb_CodeDecoderStep;
const SubGhzProtocolDecoder subghz_protocol_chamb_code_decoder = {
.alloc = subghz_protocol_decoder_chamb_code_alloc,
.free = subghz_protocol_decoder_chamb_code_free,
.feed = subghz_protocol_decoder_chamb_code_feed,
.reset = subghz_protocol_decoder_chamb_code_reset,
.get_hash_data = subghz_protocol_decoder_chamb_code_get_hash_data,
.serialize = subghz_protocol_decoder_chamb_code_serialize,
.deserialize = subghz_protocol_decoder_chamb_code_deserialize,
.get_string = subghz_protocol_decoder_chamb_code_get_string,
};
const SubGhzProtocolEncoder subghz_protocol_chamb_code_encoder = {
.alloc = subghz_protocol_encoder_chamb_code_alloc,
.free = subghz_protocol_encoder_chamb_code_free,
.deserialize = subghz_protocol_encoder_chamb_code_deserialize,
.stop = subghz_protocol_encoder_chamb_code_stop,
.yield = subghz_protocol_encoder_chamb_code_yield,
};
const SubGhzProtocol subghz_protocol_chamb_code = {
.name = SUBGHZ_PROTOCOL_CHAMB_CODE_NAME,
.type = SubGhzProtocolTypeStatic,
.flag = SubGhzProtocolFlag_315 | SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable |
SubGhzProtocolFlag_Load | SubGhzProtocolFlag_Save | SubGhzProtocolFlag_Send,
.decoder = &subghz_protocol_chamb_code_decoder,
.encoder = &subghz_protocol_chamb_code_encoder,
};
void* subghz_protocol_encoder_chamb_code_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
SubGhzProtocolEncoderChamb_Code* instance = malloc(sizeof(SubGhzProtocolEncoderChamb_Code));
instance->base.protocol = &subghz_protocol_chamb_code;
instance->generic.protocol_name = instance->base.protocol->name;
instance->encoder.repeat = 10;
instance->encoder.size_upload = 24;
instance->encoder.upload = malloc(instance->encoder.size_upload * sizeof(LevelDuration));
instance->encoder.is_running = false;
return instance;
}
void subghz_protocol_encoder_chamb_code_free(void* context) {
furi_assert(context);
SubGhzProtocolEncoderChamb_Code* instance = context;
free(instance->encoder.upload);
free(instance);
}
static uint64_t subghz_protocol_chamb_bit_to_code(uint64_t data, uint8_t size) {
uint64_t data_res = 0;
for(uint8_t i = 0; i < size; i++) {
if(!(bit_read(data, size - i - 1))) {
data_res = data_res << 4 | CHAMBERLAIN_CODE_BIT_0;
} else {
data_res = data_res << 4 | CHAMBERLAIN_CODE_BIT_1;
}
}
return data_res;
}
/**
* Generating an upload from data.
* @param instance Pointer to a SubGhzProtocolEncoderChamb_Code instance
* @return true On success
*/
static bool
subghz_protocol_encoder_chamb_code_get_upload(SubGhzProtocolEncoderChamb_Code* instance) {
furi_assert(instance);
uint64_t data = subghz_protocol_chamb_bit_to_code(
instance->generic.data, instance->generic.data_count_bit);
switch(instance->generic.data_count_bit) {
case 7:
data = ((data >> 4) << 16) | (data & 0xF) << 4 | CHAMBERLAIN_7_CODE_MASK_CHECK;
break;
case 8:
data = ((data >> 12) << 16) | (data & 0xFF) << 4 | CHAMBERLAIN_8_CODE_MASK_CHECK;
break;
case 9:
data = (data << 4) | CHAMBERLAIN_9_CODE_MASK_CHECK;
break;
default:
FURI_LOG_E(TAG, "Invalid bits count");
return false;
break;
}
#define UPLOAD_HEX_DATA_SIZE 10
uint8_t upload_hex_data[UPLOAD_HEX_DATA_SIZE] = {0};
size_t upload_hex_count_bit = 0;
//insert guard time
for(uint8_t i = 0; i < 36; i++) {
subghz_protocol_blocks_set_bit_array(
0, upload_hex_data, upload_hex_count_bit++, UPLOAD_HEX_DATA_SIZE);
}
//insert data
switch(instance->generic.data_count_bit) {
case 7:
case 9:
for(uint8_t i = 44; i > 0; i--) {
if(!bit_read(data, i - 1)) {
subghz_protocol_blocks_set_bit_array(
0, upload_hex_data, upload_hex_count_bit++, UPLOAD_HEX_DATA_SIZE);
} else {
subghz_protocol_blocks_set_bit_array(
1, upload_hex_data, upload_hex_count_bit++, UPLOAD_HEX_DATA_SIZE);
}
}
break;
case 8:
for(uint8_t i = 40; i > 0; i--) {
if(!bit_read(data, i - 1)) {
subghz_protocol_blocks_set_bit_array(
0, upload_hex_data, upload_hex_count_bit++, UPLOAD_HEX_DATA_SIZE);
} else {
subghz_protocol_blocks_set_bit_array(
1, upload_hex_data, upload_hex_count_bit++, UPLOAD_HEX_DATA_SIZE);
}
}
break;
}
instance->encoder.size_upload = subghz_protocol_blocks_get_upload(
upload_hex_data,
upload_hex_count_bit,
instance->encoder.upload,
instance->encoder.size_upload,
subghz_protocol_chamb_code_const.te_short);
return true;
}
bool subghz_protocol_encoder_chamb_code_deserialize(void* context, FlipperFormat* flipper_format) {
furi_assert(context);
SubGhzProtocolEncoderChamb_Code* instance = context;
bool res = false;
do {
if(!subghz_block_generic_deserialize(&instance->generic, flipper_format)) {
FURI_LOG_E(TAG, "Deserialize error");
break;
}
if(instance->generic.data_count_bit >
subghz_protocol_chamb_code_const.min_count_bit_for_found) {
FURI_LOG_E(TAG, "Wrong number of bits in key");
break;
}
//optional parameter parameter
flipper_format_read_uint32(
flipper_format, "Repeat", (uint32_t*)&instance->encoder.repeat, 1);
if(!subghz_protocol_encoder_chamb_code_get_upload(instance)) break;
instance->encoder.is_running = true;
res = true;
} while(false);
return res;
}
void subghz_protocol_encoder_chamb_code_stop(void* context) {
SubGhzProtocolEncoderChamb_Code* instance = context;
instance->encoder.is_running = false;
}
LevelDuration subghz_protocol_encoder_chamb_code_yield(void* context) {
SubGhzProtocolEncoderChamb_Code* 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;
}
void* subghz_protocol_decoder_chamb_code_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
SubGhzProtocolDecoderChamb_Code* instance = malloc(sizeof(SubGhzProtocolDecoderChamb_Code));
instance->base.protocol = &subghz_protocol_chamb_code;
instance->generic.protocol_name = instance->base.protocol->name;
return instance;
}
void subghz_protocol_decoder_chamb_code_free(void* context) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
free(instance);
}
void subghz_protocol_decoder_chamb_code_reset(void* context) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
instance->decoder.parser_step = Chamb_CodeDecoderStepReset;
}
static bool subghz_protocol_chamb_code_to_bit(uint64_t* data, uint8_t size) {
uint64_t data_tmp = data[0];
uint64_t data_res = 0;
for(uint8_t i = 0; i < size; i++) {
if((data_tmp & 0xF) == CHAMBERLAIN_CODE_BIT_0) {
bit_write(data_res, i, 0);
} else if((data_tmp & 0xF) == CHAMBERLAIN_CODE_BIT_1) {
bit_write(data_res, i, 1);
} else {
return false;
}
data_tmp >>= 4;
}
data[0] = data_res;
return true;
}
static bool subghz_protocol_decoder_chamb_code_check_mask_and_parse(
SubGhzProtocolDecoderChamb_Code* instance) {
furi_assert(instance);
if(instance->decoder.decode_count_bit >
subghz_protocol_chamb_code_const.min_count_bit_for_found + 1)
return false;
if((instance->decoder.decode_data & CHAMBERLAIN_7_CODE_MASK) ==
CHAMBERLAIN_7_CODE_MASK_CHECK) {
instance->decoder.decode_count_bit = 7;
instance->decoder.decode_data &= ~CHAMBERLAIN_7_CODE_MASK;
instance->decoder.decode_data = (instance->decoder.decode_data >> 12) |
((instance->decoder.decode_data >> 4) & 0xF);
} else if(
(instance->decoder.decode_data & CHAMBERLAIN_8_CODE_MASK) ==
CHAMBERLAIN_8_CODE_MASK_CHECK) {
instance->decoder.decode_count_bit = 8;
instance->decoder.decode_data &= ~CHAMBERLAIN_8_CODE_MASK;
instance->decoder.decode_data = instance->decoder.decode_data >> 4 |
CHAMBERLAIN_CODE_BIT_0 << 8; //DIP 6 no use
} else if(
(instance->decoder.decode_data & CHAMBERLAIN_9_CODE_MASK) ==
CHAMBERLAIN_9_CODE_MASK_CHECK) {
instance->decoder.decode_count_bit = 9;
instance->decoder.decode_data &= ~CHAMBERLAIN_9_CODE_MASK;
instance->decoder.decode_data >>= 4;
} else {
return false;
}
return subghz_protocol_chamb_code_to_bit(
&instance->decoder.decode_data, instance->decoder.decode_count_bit);
}
void subghz_protocol_decoder_chamb_code_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
switch(instance->decoder.parser_step) {
case Chamb_CodeDecoderStepReset:
if((!level) && (DURATION_DIFF(duration, subghz_protocol_chamb_code_const.te_short * 39) <
subghz_protocol_chamb_code_const.te_delta * 20)) {
//Found header Chamb_Code
instance->decoder.parser_step = Chamb_CodeDecoderStepFoundStartBit;
}
break;
case Chamb_CodeDecoderStepFoundStartBit:
if((level) && (DURATION_DIFF(duration, subghz_protocol_chamb_code_const.te_short) <
subghz_protocol_chamb_code_const.te_delta)) {
//Found start bit Chamb_Code
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
instance->decoder.decode_data = instance->decoder.decode_data << 4 |
CHAMBERLAIN_CODE_BIT_STOP;
instance->decoder.decode_count_bit++;
instance->decoder.parser_step = Chamb_CodeDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = Chamb_CodeDecoderStepReset;
}
break;
case Chamb_CodeDecoderStepSaveDuration:
if(!level) { //save interval
if(duration > subghz_protocol_chamb_code_const.te_short * 5) {
if(instance->decoder.decode_count_bit >=
subghz_protocol_chamb_code_const.min_count_bit_for_found) {
instance->generic.serial = 0x0;
instance->generic.btn = 0x0;
if(subghz_protocol_decoder_chamb_code_check_mask_and_parse(instance)) {
instance->generic.data = instance->decoder.decode_data;
instance->generic.data_count_bit = instance->decoder.decode_count_bit;
if(instance->base.callback)
instance->base.callback(&instance->base, instance->base.context);
}
}
instance->decoder.parser_step = Chamb_CodeDecoderStepReset;
} else {
instance->decoder.te_last = duration;
instance->decoder.parser_step = Chamb_CodeDecoderStepCheckDuration;
}
} else {
instance->decoder.parser_step = Chamb_CodeDecoderStepReset;
}
break;
case Chamb_CodeDecoderStepCheckDuration:
if(level) {
if((DURATION_DIFF( //Found stop bit Chamb_Code
instance->decoder.te_last,
subghz_protocol_chamb_code_const.te_short * 3) <
subghz_protocol_chamb_code_const.te_delta) &&
(DURATION_DIFF(duration, subghz_protocol_chamb_code_const.te_short) <
subghz_protocol_chamb_code_const.te_delta)) {
instance->decoder.decode_data = instance->decoder.decode_data << 4 |
CHAMBERLAIN_CODE_BIT_STOP;
instance->decoder.decode_count_bit++;
instance->decoder.parser_step = Chamb_CodeDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, subghz_protocol_chamb_code_const.te_short * 2) <
subghz_protocol_chamb_code_const.te_delta) &&
(DURATION_DIFF(duration, subghz_protocol_chamb_code_const.te_short * 2) <
subghz_protocol_chamb_code_const.te_delta)) {
instance->decoder.decode_data = instance->decoder.decode_data << 4 |
CHAMBERLAIN_CODE_BIT_1;
instance->decoder.decode_count_bit++;
instance->decoder.parser_step = Chamb_CodeDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, subghz_protocol_chamb_code_const.te_short) <
subghz_protocol_chamb_code_const.te_delta) &&
(DURATION_DIFF(duration, subghz_protocol_chamb_code_const.te_short * 3) <
subghz_protocol_chamb_code_const.te_delta)) {
instance->decoder.decode_data = instance->decoder.decode_data << 4 |
CHAMBERLAIN_CODE_BIT_0;
instance->decoder.decode_count_bit++;
instance->decoder.parser_step = Chamb_CodeDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = Chamb_CodeDecoderStepReset;
}
} else {
instance->decoder.parser_step = Chamb_CodeDecoderStepReset;
}
break;
}
}
uint8_t subghz_protocol_decoder_chamb_code_get_hash_data(void* context) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
return subghz_protocol_blocks_get_hash_data(
&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
}
bool subghz_protocol_decoder_chamb_code_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzPresetDefinition* preset) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
return subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
}
bool subghz_protocol_decoder_chamb_code_deserialize(void* context, FlipperFormat* flipper_format) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
bool ret = false;
do {
if(!subghz_block_generic_deserialize(&instance->generic, flipper_format)) {
break;
}
if(instance->generic.data_count_bit >
subghz_protocol_chamb_code_const.min_count_bit_for_found) {
FURI_LOG_E(TAG, "Wrong number of bits in key");
break;
}
ret = true;
} while(false);
return ret;
}
void subghz_protocol_decoder_chamb_code_get_string(void* context, string_t output) {
furi_assert(context);
SubGhzProtocolDecoderChamb_Code* instance = context;
uint32_t code_found_lo = instance->generic.data & 0x00000000ffffffff;
uint64_t code_found_reverse = subghz_protocol_blocks_reverse_key(
instance->generic.data, instance->generic.data_count_bit);
uint32_t code_found_reverse_lo = code_found_reverse & 0x00000000ffffffff;
string_cat_printf(
output,
"%s %db\r\n"
"Key:0x%03lX\r\n"
"Yek:0x%03lX\r\n",
instance->generic.protocol_name,
instance->generic.data_count_bit,
code_found_lo,
code_found_reverse_lo);
switch(instance->generic.data_count_bit) {
case 7:
string_cat_printf(
output,
"DIP:" CHAMBERLAIN_7_CODE_DIP_PATTERN "\r\n",
CHAMBERLAIN_7_CODE_DATA_TO_DIP(code_found_lo));
break;
case 8:
string_cat_printf(
output,
"DIP:" CHAMBERLAIN_8_CODE_DIP_PATTERN "\r\n",
CHAMBERLAIN_8_CODE_DATA_TO_DIP(code_found_lo));
break;
case 9:
string_cat_printf(
output,
"DIP:" CHAMBERLAIN_9_CODE_DIP_PATTERN "\r\n",
CHAMBERLAIN_9_CODE_DATA_TO_DIP(code_found_lo));
break;
default:
break;
}
}
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