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SubGhz: reading keys from encrypted files (#803)

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* SubGhz: add file with manufactory codes, and the ability to add your own manufactory codes for KeeLog
* SubGhz: add encrypt RAW data, add decrypt and get RAW data
* SubGhz: add encrypt  magic_xor_atomo
* SubGhz: parsing atomo using file encrypt
* SubGhz: fix calculating the size of the read buffer
* SubGhz: parsing Nice FLOR S using file encrypt
* SubGhz: add file encrypt nice_flor_s_tx, fix name load file
* SubGhz: fix checking read buffer size
* Update subghz_keystore.c
* SubGhz: fix calculating the size of the read buffer

Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
Skorpionm 2021-11-03 20:41:07 +04:00 committed by GitHub
parent 300302cb7c
commit 6d548637f2
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
14 changed files with 445 additions and 457 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
applications/subghz/subghz.c
View File

@ -188,7 +188,8 @@ SubGhz* subghz_alloc() {
string_init(subghz->error_str);
subghz_parser_load_keeloq_file(subghz->txrx->parser, "/ext/subghz/keeloq_mfcodes");
subghz_parser_load_nice_flor_s_file(subghz->txrx->parser, "/ext/subghz/nice_floor_s_rx");
subghz_parser_load_keeloq_file(subghz->txrx->parser, "/ext/subghz/keeloq_mfcodes_user");
subghz_parser_load_nice_flor_s_file(subghz->txrx->parser, "/ext/subghz/nice_flor_s_rx");
subghz_parser_load_came_atomo_file(subghz->txrx->parser, "/ext/subghz/came_atomo");
//subghz_parser_enable_dump_text(subghz->protocol, subghz_text_callback, subghz);

51
applications/subghz/subghz_cli.c
View File

@ -212,7 +212,9 @@ void subghz_cli_command_rx(Cli* cli, string_t args, void* context) {
SubGhzParser* parser = subghz_parser_alloc();
subghz_parser_load_keeloq_file(parser, "/ext/subghz/keeloq_mfcodes");
subghz_parser_load_nice_flor_s_file(parser, "/ext/subghz/nice_floor_s_rx");
subghz_parser_load_keeloq_file(parser, "/ext/subghz/keeloq_mfcodes_user");
subghz_parser_load_nice_flor_s_file(parser, "/ext/subghz/nice_flor_s_rx");
subghz_parser_load_came_atomo_file(parser, "/ext/subghz/came_atomo");
subghz_parser_enable_dump_text(parser, subghz_cli_command_rx_text_callback, instance);
// Configure radio
@ -260,10 +262,12 @@ void subghz_cli_command_rx(Cli* cli, string_t args, void* context) {
void subghz_cli_command_print_usage() {
printf("Usage:\r\n");
printf("subghz_crypto <cmd> <args>\r\n");
printf("subghz <cmd> <args>\r\n");
printf("Cmd list:\r\n");
printf(
"\tkeeloq <plain_text_file> <encrypted_file> <IV:16 bytes in hex>\t - Encrypt keeloq manufacture keys\r\n");
"\tencrypt_keeloq <path_decrypted_file> <path_encrypted_file> <IV:16 bytes in hex>\t - Encrypt keeloq manufacture keys\r\n");
printf(
"\tencrypt_raw <path_decrypted_file> <path_encrypted_file> <IV:16 bytes in hex>\t - Encrypt RAW data\r\n");
}
void subghz_cli_command_encrypt_keeloq(Cli* cli, string_t args) {
@ -308,6 +312,42 @@ void subghz_cli_command_encrypt_keeloq(Cli* cli, string_t args) {
string_clear(source);
}
void subghz_cli_command_encrypt_raw(Cli* cli, string_t args) {
uint8_t iv[16];
string_t source;
string_t destination;
string_init(source);
string_init(destination);
do {
if(!args_read_string_and_trim(args, source)) {
subghz_cli_command_print_usage();
break;
}
if(!args_read_string_and_trim(args, destination)) {
subghz_cli_command_print_usage();
break;
}
if(!args_read_hex_bytes(args, iv, 16)) {
subghz_cli_command_print_usage();
break;
}
if(!subghz_keystore_raw_encrypted_save(
string_get_cstr(source), string_get_cstr(destination), iv)) {
printf("Failed to save Keystore");
break;
}
} while(false);
string_clear(destination);
string_clear(source);
}
void subghz_cli_command(Cli* cli, string_t args, void* context) {
string_t cmd;
string_init(cmd);
@ -323,6 +363,11 @@ void subghz_cli_command(Cli* cli, string_t args, void* context) {
break;
}
if(string_cmp_str(cmd, "encrypt_raw") == 0) {
subghz_cli_command_encrypt_raw(cli, args);
break;
}
subghz_cli_command_print_usage();
} while(false);

6
assets/resources/subghz/came_atomo Normal file
View File

@ -0,0 +1,6 @@
Filetype: Flipper SubGhz Keystore RAW File
Version: 0
Encryption: 1
IV: 47 69 6D 6D 65 20 74 68 65 63 6F 6F 6B 69 65 73
Encrypt_data: RAW
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

288
assets/resources/subghz/keeloq_mfcodes
View File

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11
assets/resources/subghz/keeloq_mfcodes_user Normal file
View File

@ -0,0 +1,11 @@
# for adding manufacture keys
# AABBCCDDEEFFAABB:X:NAME\r\n
# AABBCCDDEEFFAABB - man 64 bit
# X - encryption method 1 - Simple Learning, 2 - Normal_Learning,
# 0 - iterates over both previous and man in direct and reverse byte sequence
# NAME - name (string without spaces) max 64 characters long
Filetype: Flipper SubGhz Keystore File
Version: 0
Encryption: 0
AABBCCDDEEFFAABB:1:Test1
AABBCCDDEEFFAABB:1:Test2

6
assets/resources/subghz/nice_flor_s_rx Normal file
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File diff suppressed because one or more lines are too long

6
assets/resources/subghz/nice_flor_s_tx Normal file
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File diff suppressed because one or more lines are too long

75
lib/subghz/protocols/subghz_protocol_came_atomo.c
View File

@ -1,6 +1,7 @@
#include "subghz_protocol_came_atomo.h"
#include "subghz_protocol_common.h"
#include <lib/toolbox/manchester-decoder.h>
#include "../subghz_keystore.h"
#define SUBGHZ_NO_CAME_ATOMO_RAINBOW_TABLE 0xFFFFFFFFFFFFFFFF
@ -25,14 +26,8 @@ SubGhzProtocolCameAtomo* subghz_protocol_came_atomo_alloc() {
instance->common.te_delta = 250;
instance->common.type_protocol = SubGhzProtocolCommonTypeStatic;
instance->common.to_string = (SubGhzProtocolCommonToStr)subghz_protocol_came_atomo_to_str;
// instance->common.to_save_string =
// (SubGhzProtocolCommonGetStrSave)subghz_protocol_came_atomo_to_save_str;
//instance->common.to_load_protocol_from_file =
// (SubGhzProtocolCommonLoadFromFile)subghz_protocol_came_atomo_to_load_protocol_from_file;
instance->common.to_load_protocol =
(SubGhzProtocolCommonLoadFromRAW)subghz_decoder_came_atomo_to_load_protocol;
// instance->common.get_upload_protocol =
// (SubGhzProtocolCommonEncoderGetUpLoad)subghz_protocol_came_atomo_send_key;
return instance;
}
@ -62,20 +57,14 @@ uint64_t subghz_came_atomo_get_atomo_magic_xor_in_file(
uint32_t address = number_atomo_magic_xor * sizeof(uint64_t);
uint64_t atomo_magic_xor = 0;
FileWorker* file_worker = file_worker_alloc(true);
if(file_worker_open(
file_worker, instance->rainbow_table_file_name, FSAM_READ, FSOM_OPEN_EXISTING)) {
file_worker_seek(file_worker, address, true);
file_worker_read(file_worker, &buffer, sizeof(uint64_t));
if(subghz_keystore_raw_get_data(
instance->rainbow_table_file_name, address, buffer, sizeof(uint64_t))) {
for(size_t i = 0; i < sizeof(uint64_t); i++) {
atomo_magic_xor = (atomo_magic_xor << 8) | buffer[i];
}
} else {
atomo_magic_xor = SUBGHZ_NO_CAME_ATOMO_RAINBOW_TABLE;
}
file_worker_close(file_worker);
file_worker_free(file_worker);
return atomo_magic_xor;
}
@ -265,64 +254,6 @@ void subghz_protocol_came_atomo_to_str(SubGhzProtocolCameAtomo* instance, string
instance->common.cnt);
}
// void subghz_protocol_came_atomo_to_save_str(SubGhzProtocolCameAtomo* instance, string_t output) {
// string_printf(
// output,
// "Protocol: %s\n"
// "Bit: %d\n"
// "Key: %08lX%08lX\r\n",
// instance->common.name,
// instance->common.code_last_count_bit,
// (uint32_t)(instance->common.code_last_found >> 32),
// (uint32_t)(instance->common.code_last_found & 0xFFFFFFFF));
// }
// bool subghz_protocol_came_atomo_to_load_protocol_from_file(
// FileWorker* file_worker,
// SubGhzProtocolCameAtomo* instance,
// const char* file_path) {
// bool loaded = false;
// string_t temp_str;
// string_init(temp_str);
// int res = 0;
// int data = 0;
// do {
// // Read and parse bit data from 2nd line
// if(!file_worker_read_until(file_worker, temp_str, '\n')) {
// break;
// }
// res = sscanf(string_get_cstr(temp_str), "Bit: %d\n", &data);
// if(res != 1) {
// break;
// }
// instance->common.code_last_count_bit = (uint8_t)data;
// // Read and parse key data from 3nd line
// if(!file_worker_read_until(file_worker, temp_str, '\n')) {
// break;
// }
// // strlen("Key: ") = 5
// string_right(temp_str, 5);
// uint8_t buf_key[8] = {0};
// if(!subghz_protocol_common_read_hex(temp_str, buf_key, 8)) {
// break;
// }
// for(uint8_t i = 0; i < 8; i++) {
// instance->common.code_last_found = instance->common.code_last_found << 8 | buf_key[i];
// }
// loaded = true;
// } while(0);
// string_clear(temp_str);
// subghz_protocol_came_atomo_remote_controller(instance);
// return loaded;
// }
void subghz_decoder_came_atomo_to_load_protocol(SubGhzProtocolCameAtomo* instance, void* context) {
furi_assert(context);
furi_assert(instance);

29
lib/subghz/protocols/subghz_protocol_came_atomo.h
View File

@ -23,16 +23,6 @@ void subghz_protocol_came_atomo_free(SubGhzProtocolCameAtomo* instance);
*/
void subghz_protocol_came_atomo_name_file(SubGhzProtocolCameAtomo* instance, const char* name);
// /** Get upload protocol
// *
// * @param instance - SubGhzProtocolCameAtomo instance
// * @param encoder - SubGhzProtocolCommonEncoder encoder
// * @return bool
// */
// bool subghz_protocol_came_atomo_send_key(
// SubGhzProtocolCameAtomo* instance,
// SubGhzProtocolCommonEncoder* encoder);
/** Reset internal state
* @param instance - SubGhzProtocolCameAtomo instance
*/
@ -55,25 +45,6 @@ void subghz_protocol_came_atomo_parse(
*/
void subghz_protocol_came_atomo_to_str(SubGhzProtocolCameAtomo* instance, string_t output);
// /** Get a string to save the protocol
// *
// * @param instance - SubGhzProtocolCameAtomo instance
// * @param output - the resulting string
// */
// void subghz_protocol_came_atomo_to_save_str(SubGhzProtocolCameAtomo* instance, string_t output);
// /** Loading protocol from file
// *
// * @param file_worker - FileWorker file_worker
// * @param instance - SubGhzProtocolCameAtomo instance
// * @param file_path - file path
// * @return bool
// */
// bool subghz_protocol_came_atomo_to_load_protocol_from_file(
// FileWorker* file_worker,
// SubGhzProtocolCameAtomo* instance,
// const char* file_path);
/** Loading protocol from bin data
*
* @param instance - SubGhzProtocolCameAtomo instance

2
lib/subghz/protocols/subghz_protocol_faac_slh.c
View File

@ -167,7 +167,7 @@ void subghz_protocol_faac_slh_to_str(SubGhzProtocolFaacSLH* instance, string_t o
string_cat_printf(
output,
"%s %dbit\r\n"
"Key:0x%lX%08lX\r\n"
"Key:%lX%08lX\r\n"
"Fix:%08lX \r\n"
"Hop:%08lX \r\n"
"Sn:%07lX Btn:%lX\r\n",

17
lib/subghz/protocols/subghz_protocol_nice_flor_s.c
View File

@ -2,6 +2,7 @@
#include <furi.h>
#include "file-worker.h"
#include "../subghz_keystore.h"
/*
* https://phreakerclub.com/1615
* https://phreakerclub.com/forum/showthread.php?t=2360
@ -103,17 +104,13 @@ void subghz_protocol_nice_flor_s_send_key(
uint8_t subghz_nice_flor_s_get_byte_in_file(SubGhzProtocolNiceFlorS* instance, uint32_t address) {
if(!instance->rainbow_table_file_name) return 0;
uint8_t buffer = 0;
FileWorker* file_worker = file_worker_alloc(true);
if(file_worker_open(
file_worker, instance->rainbow_table_file_name, FSAM_READ, FSOM_OPEN_EXISTING)) {
file_worker_seek(file_worker, address, true);
file_worker_read(file_worker, &buffer, 1);
uint8_t buffer[1] = {0};
if(subghz_keystore_raw_get_data(
instance->rainbow_table_file_name, address, buffer, sizeof(uint8_t))) {
return buffer[0];
} else {
return 0;
}
file_worker_close(file_worker);
file_worker_free(file_worker);
return buffer;
}
/** Decrypt protocol Nice Flor S

311
lib/subghz/subghz_keystore.c
View File

@ -12,6 +12,7 @@
#define FILE_BUFFER_SIZE 64
#define SUBGHZ_KEYSTORE_FILE_TYPE "Flipper SubGhz Keystore File"
#define SUBGHZ_KEYSTORE_FILE_RAW_TYPE "Flipper SubGhz Keystore RAW File"
#define SUBGHZ_KEYSTORE_FILE_VERSION 0
#define SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT 1
@ -48,7 +49,11 @@ void subghz_keystore_free(SubGhzKeystore* instance) {
free(instance);
}
static void subghz_keystore_add_key(SubGhzKeystore* instance, const char* name, uint64_t key, uint16_t type) {
static void subghz_keystore_add_key(
SubGhzKeystore* instance,
const char* name,
uint64_t key,
uint16_t type) {
SubGhzKey* manufacture_code = SubGhzKeyArray_push_raw(instance->data);
string_init_set_str(manufacture_code->name, name);
manufacture_code->key = key;
@ -76,8 +81,7 @@ static void subghz_keystore_mess_with_iv(uint8_t* iv) {
// Sharing them will bring some discomfort to legal owners
// And potential legal action against you
// While you reading this code think about your own personal responsibility
asm volatile(
"movs r0, #0x0 \n"
asm volatile("movs r0, #0x0 \n"
"movs r1, #0x0 \n"
"movs r2, #0x0 \n"
"movs r3, #0x0 \n"
@ -125,7 +129,8 @@ static bool subghz_keystore_read_file(SubGhzKeystore* instance, File* file, uint
}
len /= 2;
if(furi_hal_crypto_decrypt((uint8_t*)encrypted_line, (uint8_t*)decrypted_line, len)) {
if(furi_hal_crypto_decrypt(
(uint8_t*)encrypted_line, (uint8_t*)decrypted_line, len)) {
subghz_keystore_process_line(instance, decrypted_line);
} else {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Decryption failed");
@ -133,7 +138,8 @@ static bool subghz_keystore_read_file(SubGhzKeystore* instance, File* file, uint
break;
}
} else {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Invalid encrypted data: %s", encrypted_line);
FURI_LOG_E(
SUBGHZ_KEYSTORE_TAG, "Invalid encrypted data: %s", encrypted_line);
}
} else {
subghz_keystore_process_line(instance, encrypted_line);
@ -192,8 +198,8 @@ bool subghz_keystore_load(SubGhzKeystore* instance, const char* file_name) {
break;
}
if (strcmp(string_get_cstr(filetype), SUBGHZ_KEYSTORE_FILE_TYPE) != 0
|| version != SUBGHZ_KEYSTORE_FILE_VERSION) {
if(strcmp(string_get_cstr(filetype), SUBGHZ_KEYSTORE_FILE_TYPE) != 0 ||
version != SUBGHZ_KEYSTORE_FILE_VERSION) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Type or version mismatch");
break;
}
@ -237,7 +243,8 @@ bool subghz_keystore_save(SubGhzKeystore* instance, const char* file_name, uint8
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to open file for write: %s", file_name);
break;
}
if(!flipper_file_write_header_cstr(flipper_file, SUBGHZ_KEYSTORE_FILE_TYPE, SUBGHZ_KEYSTORE_FILE_VERSION)) {
if(!flipper_file_write_header_cstr(
flipper_file, SUBGHZ_KEYSTORE_FILE_TYPE, SUBGHZ_KEYSTORE_FILE_VERSION)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to add header");
break;
}
@ -260,18 +267,19 @@ bool subghz_keystore_save(SubGhzKeystore* instance, const char* file_name, uint8
File* file = flipper_file_get_file(flipper_file);
size_t encrypted_line_count = 0;
for
M_EACH(
key,
instance->data,
SubGhzKeyArray_t) {
M_EACH(key, instance->data, SubGhzKeyArray_t) {
// Wipe buffer before packing
memset(decrypted_line, 0, SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE);
memset(encrypted_line, 0, SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE);
// Form unecreypted line
int len = snprintf(
decrypted_line, SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE,
decrypted_line,
SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE,
"%08lX%08lX:%hu:%s",
(uint32_t)(key->key>>32), (uint32_t)key->key, key->type, string_get_cstr(key->name));
(uint32_t)(key->key >> 32),
(uint32_t)key->key,
key->type,
string_get_cstr(key->name));
// Verify length and align
furi_assert(len > 0);
if(len % 16 != 0) {
@ -280,7 +288,8 @@ bool subghz_keystore_save(SubGhzKeystore* instance, const char* file_name, uint8
furi_assert(len % 16 == 0);
furi_assert(len <= SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE);
// Form encrypted line
if(!furi_hal_crypto_encrypt((uint8_t*)decrypted_line, (uint8_t*)encrypted_line, len)) {
if(!furi_hal_crypto_encrypt(
(uint8_t*)decrypted_line, (uint8_t*)encrypted_line, len)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Encryption failed");
break;
}
@ -296,7 +305,8 @@ bool subghz_keystore_save(SubGhzKeystore* instance, const char* file_name, uint8
storage_file_write(file, "\n", 1);
encrypted_line_count++;
FURI_LOG_I(SUBGHZ_KEYSTORE_TAG, "Encrypted: `%s` -> `%s`", decrypted_line, encrypted_line);
FURI_LOG_I(
SUBGHZ_KEYSTORE_TAG, "Encrypted: `%s` -> `%s`", decrypted_line, encrypted_line);
}
furi_hal_crypto_store_unload_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT);
result = encrypted_line_count == SubGhzKeyArray_size(instance->data);
@ -315,3 +325,272 @@ SubGhzKeyArray_t* subghz_keystore_get_data(SubGhzKeystore* instance) {
furi_assert(instance);
return &instance->data;
}
bool subghz_keystore_raw_encrypted_save(
const char* input_file_name,
const char* output_file_name,
uint8_t* iv) {
bool encrypted = false;
uint32_t version;
string_t filetype;
string_init(filetype);
SubGhzKeystoreEncryption encryption;
Storage* storage = furi_record_open("storage");
char* encrypted_line = furi_alloc(SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE);
FlipperFile* input_flipper_file = flipper_file_alloc(storage);
do {
if(!flipper_file_open_read(input_flipper_file, input_file_name)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to open file for read: %s", input_file_name);
break;
}
if(!flipper_file_read_header(input_flipper_file, filetype, &version)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Missing or incorrect header");
break;
}
if(!flipper_file_read_uint32(input_flipper_file, "Encryption", (uint32_t*)&encryption)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Missing encryption type");
break;
}
if(strcmp(string_get_cstr(filetype), SUBGHZ_KEYSTORE_FILE_RAW_TYPE) != 0 ||
version != SUBGHZ_KEYSTORE_FILE_VERSION) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Type or version mismatch");
break;
}
if(encryption != SubGhzKeystoreEncryptionNone) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Already encryption");
break;
}
File* input_file = flipper_file_get_file(input_flipper_file);
FlipperFile* output_flipper_file = flipper_file_alloc(storage);
if(!flipper_file_new_write(output_flipper_file, output_file_name)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to open file for write: %s", output_file_name);
break;
}
if(!flipper_file_write_header_cstr(
output_flipper_file, string_get_cstr(filetype), SUBGHZ_KEYSTORE_FILE_VERSION)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to add header");
break;
}
if(!flipper_file_write_uint32(
output_flipper_file, "Encryption", SubGhzKeystoreEncryptionAES256)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to add Encryption");
break;
}
if(!flipper_file_write_hex_array(output_flipper_file, "IV", iv, 16)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to add IV");
break;
}
if(!flipper_file_write_string_cstr(output_flipper_file, "Encrypt_data", "RAW")) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to add Encrypt_data");
break;
}
subghz_keystore_mess_with_iv(iv);
if(!furi_hal_crypto_store_load_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT, iv)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to load encryption key");
break;
}
File* output_file = flipper_file_get_file(output_flipper_file);
char buffer[FILE_BUFFER_SIZE];
bool result = true;
size_t ret = 0;
furi_assert(FILE_BUFFER_SIZE % 16 == 0);
//skip the end of the previous line "\n"
storage_file_read(input_file, buffer, 1);
do {
memset(buffer, 0, FILE_BUFFER_SIZE);
ret = storage_file_read(input_file, buffer, FILE_BUFFER_SIZE);
if(ret == 0) {
break;
}
for(uint16_t i = 0; i < FILE_BUFFER_SIZE - 1; i += 2) {
uint8_t hi_nibble = 0;
uint8_t lo_nibble = 0;
hex_char_to_hex_nibble(buffer[i], &hi_nibble);
hex_char_to_hex_nibble(buffer[i + 1], &lo_nibble);
buffer[i / 2] = (hi_nibble << 4) | lo_nibble;
}
memset(encrypted_line, 0, SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE);
// Form encrypted line
if(!furi_hal_crypto_encrypt(
(uint8_t*)buffer, (uint8_t*)encrypted_line, FILE_BUFFER_SIZE / 2)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Encryption failed");
result = false;
break;
}
// HEX Encode encrypted line
const char xx[] = "0123456789ABCDEF";
for(size_t i = 0; i < FILE_BUFFER_SIZE / 2; i++) {
size_t cursor = FILE_BUFFER_SIZE / 2 - i - 1;
size_t hex_cursor = FILE_BUFFER_SIZE - i * 2 - 1;
encrypted_line[hex_cursor] = xx[encrypted_line[cursor] & 0xF];
encrypted_line[hex_cursor - 1] = xx[(encrypted_line[cursor] >> 4) & 0xF];
}
storage_file_write(output_file, encrypted_line, strlen(encrypted_line));
} while(ret > 0 && result);
flipper_file_close(output_flipper_file);
flipper_file_free(output_flipper_file);
furi_hal_crypto_store_unload_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT);
if(!result) break;
encrypted = true;
} while(0);
flipper_file_close(input_flipper_file);
flipper_file_free(input_flipper_file);
free(encrypted_line);
furi_record_close("storage");
return encrypted;
}
bool subghz_keystore_raw_get_data(const char* file_name, size_t offset, uint8_t* data, size_t len) {
bool result = false;
uint8_t iv[16];
uint32_t version;
SubGhzKeystoreEncryption encryption;
string_t str_temp;
string_init(str_temp);
Storage* storage = furi_record_open("storage");
char* decrypted_line = furi_alloc(SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE);
FlipperFile* flipper_file = flipper_file_alloc(storage);
do {
if(!flipper_file_open_read(flipper_file, file_name)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to open file for read: %s", file_name);
break;
}
if(!flipper_file_read_header(flipper_file, str_temp, &version)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Missing or incorrect header");
break;
}
if(!flipper_file_read_uint32(flipper_file, "Encryption", (uint32_t*)&encryption)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Missing encryption type");
break;
}
if(strcmp(string_get_cstr(str_temp), SUBGHZ_KEYSTORE_FILE_RAW_TYPE) != 0 ||
version != SUBGHZ_KEYSTORE_FILE_VERSION) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Type or version mismatch");
break;
}
File* file = flipper_file_get_file(flipper_file);
if(encryption != SubGhzKeystoreEncryptionAES256) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unknown encryption");
break;
}
if(offset < 16) {
if(!flipper_file_read_hex_array(flipper_file, "IV", iv, 16)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Missing IV");
break;
}
subghz_keystore_mess_with_iv(iv);
}
if(!flipper_file_read_string(flipper_file, "Encrypt_data", str_temp)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Missing Encrypt_data");
break;
}
size_t bufer_size;
if(len <= (16 - offset % 16)) {
bufer_size = 32;
} else {
bufer_size = (((len) / 16) + 2) * 32;
}
furi_assert(SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE >= bufer_size / 2);
char buffer[bufer_size];
size_t ret = 0;
bool decrypted = true;
//skip the end of the previous line "\n"
storage_file_read(file, buffer, 1);
size_t size = storage_file_size(file);
size -= storage_file_tell(file);
if(size < (offset * 2 + len * 2)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Seek position exceeds file size");
break;
}
if(offset >= 16) {
storage_file_seek(file, ((offset / 16) - 1) * 32, false);
ret = storage_file_read(file, buffer, 32);
furi_assert(ret == 32);
for(uint16_t i = 0; i < ret - 1; i += 2) {
uint8_t hi_nibble = 0;
uint8_t lo_nibble = 0;
hex_char_to_hex_nibble(buffer[i], &hi_nibble);
hex_char_to_hex_nibble(buffer[i + 1], &lo_nibble);
iv[i / 2] = (hi_nibble << 4) | lo_nibble;
}
}
if(!furi_hal_crypto_store_load_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT, iv)) {
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Unable to load encryption key");
break;
}
do {
memset(buffer, 0, bufer_size);
ret = storage_file_read(file, buffer, bufer_size);
furi_assert(ret == bufer_size);
for(uint16_t i = 0; i < ret - 1; i += 2) {
uint8_t hi_nibble = 0;
uint8_t lo_nibble = 0;
hex_char_to_hex_nibble(buffer[i], &hi_nibble);
hex_char_to_hex_nibble(buffer[i + 1], &lo_nibble);
buffer[i / 2] = (hi_nibble << 4) | lo_nibble;
}
memset(decrypted_line, 0, SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE);
if(!furi_hal_crypto_decrypt(
(uint8_t*)buffer, (uint8_t*)decrypted_line, bufer_size / 2)) {
decrypted = false;
FURI_LOG_E(SUBGHZ_KEYSTORE_TAG, "Decryption failed");
break;
}
memcpy(data, (uint8_t*)decrypted_line + (offset - (offset / 16) * 16), len);
} while(0);
furi_hal_crypto_store_unload_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT);
if(decrypted) result = true;
} while(0);
flipper_file_close(flipper_file);
flipper_file_free(flipper_file);
furi_record_close("storage");
free(decrypted_line);
string_clear(str_temp);
return result;
}

19
lib/subghz/subghz_keystore.h
View File

@ -48,3 +48,22 @@ bool subghz_keystore_save(SubGhzKeystore* instance, const char* filename, uint8_
* @return SubGhzKeyArray_t*
*/
SubGhzKeyArray_t* subghz_keystore_get_data(SubGhzKeystore* instance);
/** Save RAW encrypted to file
*
* @param input_file_name - const char* full path to the input file
* @param output_file_name - const char* full path to the output file
*/
bool subghz_keystore_raw_encrypted_save(
const char* input_file_name,
const char* output_file_name,
uint8_t* iv);
/** Get decrypt RAW data to file
*
* @param file_name - const char* full path to the input file
* @param offset - offset from the start of the RAW data
* @param data - returned array
* @param len - required data length
*/
bool subghz_keystore_raw_get_data(const char* file_name, size_t offset, uint8_t* data, size_t len);