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[FL-2645, FL-2810] SubGhz: handle missing key in cryptostore. Lib: lower default display contrast. (#1717)

Browse Source 
* SubGhz: skip file loading on key load fail

* Lib: update default display contrast

* Format sources

Co-authored-by: hedger <hedger@users.noreply.github.com>
This commit is contained in:
あく
2022-09-08 16:18:18 +09:00
committed by GitHub
parent ff33bc6aea
commit b62096fb91
2 changed files with 61 additions and 54 deletions
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111
lib/subghz/subghz_keystore.c
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@@ -114,62 +114,69 @@ static bool subghz_keystore_read_file(SubGhzKeystore* instance, Stream* stream,
char* encrypted_line = malloc(SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE);
size_t encrypted_line_cursor = 0;
if(iv) furi_hal_crypto_store_load_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT, iv);
size_t ret = 0;
do {
ret = stream_read(stream, buffer, FILE_BUFFER_SIZE);
for(uint16_t i = 0; i < ret; i++) {
if(buffer[i] == '\n' && encrypted_line_cursor > 0) {
// Process line
if(iv) {
// Data alignment check, 32 instead of 16 because of hex encoding
size_t len = strlen(encrypted_line);
if(len % 32 == 0) {
// Inplace hex to bin conversion
for(size_t i = 0; i < len; i += 2) {
uint8_t hi_nibble = 0;
uint8_t lo_nibble = 0;
hex_char_to_hex_nibble(encrypted_line[i], &hi_nibble);
hex_char_to_hex_nibble(encrypted_line[i + 1], &lo_nibble);
encrypted_line[i / 2] = (hi_nibble << 4) | lo_nibble;
}
len /= 2;
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(TAG, "Decryption failed");
result = false;
break;
}
} else {
FURI_LOG_E(TAG, "Invalid encrypted data: %s", encrypted_line);
}
} else {
subghz_keystore_process_line(instance, encrypted_line);
}
// reset line buffer
memset(decrypted_line, 0, SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE);
memset(encrypted_line, 0, SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE);
encrypted_line_cursor = 0;
} else if(buffer[i] == '\r' || buffer[i] == '\n') {
// do not add line endings to the buffer
} else {
if(encrypted_line_cursor < SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE) {
encrypted_line[encrypted_line_cursor] = buffer[i];
encrypted_line_cursor++;
} else {
FURI_LOG_E(TAG, "Malformed file");
result = false;
break;
}
if(iv) {
if(!furi_hal_crypto_store_load_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT, iv)) {
FURI_LOG_E(TAG, "Unable to load decryption key");
break;
}
}
} while(ret > 0 && result);
if(iv) furi_hal_crypto_store_unload_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT);
size_t ret = 0;
do {
ret = stream_read(stream, buffer, FILE_BUFFER_SIZE);
for(uint16_t i = 0; i < ret; i++) {
if(buffer[i] == '\n' && encrypted_line_cursor > 0) {
// Process line
if(iv) {
// Data alignment check, 32 instead of 16 because of hex encoding
size_t len = strlen(encrypted_line);
if(len % 32 == 0) {
// Inplace hex to bin conversion
for(size_t i = 0; i < len; i += 2) {
uint8_t hi_nibble = 0;
uint8_t lo_nibble = 0;
hex_char_to_hex_nibble(encrypted_line[i], &hi_nibble);
hex_char_to_hex_nibble(encrypted_line[i + 1], &lo_nibble);
encrypted_line[i / 2] = (hi_nibble << 4) | lo_nibble;
}
len /= 2;
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(TAG, "Decryption failed");
result = false;
break;
}
} else {
FURI_LOG_E(TAG, "Invalid encrypted data: %s", encrypted_line);
}
} else {
subghz_keystore_process_line(instance, encrypted_line);
}
// reset line buffer
memset(decrypted_line, 0, SUBGHZ_KEYSTORE_FILE_DECRYPTED_LINE_SIZE);
memset(encrypted_line, 0, SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE);
encrypted_line_cursor = 0;
} else if(buffer[i] == '\r' || buffer[i] == '\n') {
// do not add line endings to the buffer
} else {
if(encrypted_line_cursor < SUBGHZ_KEYSTORE_FILE_ENCRYPTED_LINE_SIZE) {
encrypted_line[encrypted_line_cursor] = buffer[i];
encrypted_line_cursor++;
} else {
FURI_LOG_E(TAG, "Malformed file");
result = false;
break;
}
}
}
} while(ret > 0 && result);
if(iv) furi_hal_crypto_store_unload_key(SUBGHZ_KEYSTORE_FILE_ENCRYPTION_KEY_SLOT);
} while(false);
free(encrypted_line);
free(decrypted_line);