putString method

Future<void> putString(String key, String val, { bool isEncrypted = false, })

Method to set String in local storage key -> Key for key-value pair isEncrypted -> Flag whether to encrypt or not val -> Value for key-value pair

Implementation

Future<void> putString(String key, String val, {bool isEncrypted = false}) async {
  _assetFunction(isEncrypted);
  if (isEncrypted) {
    if (Platform.isAndroid) {
      _secureStorage?.write(key: key, value: val);
    } else if (Platform.isIOS) {
      if (await _isMasterKeyAvailable() && _areSubKeysAvailable()) {
        final keys = await _getEncrypterKeys();
        final algorithm = _getAlgorithm();

        final encryptedKey = await algorithm.encrypt(key.codeUnits,
            secretKey:
                SecretKey(keys.first[SuperSecureSharedPref.keyForKey]!),
            nonce: keys.first[SuperSecureSharedPref.ivForKey]);
        final encryptedValue = await algorithm.encrypt(val.codeUnits,
            secretKey: SecretKey(keys.last[SuperSecureSharedPref.keyForKey]!),
            nonce: keys.last[SuperSecureSharedPref.ivForKey]);
        _sharedPreferences.setString(encryptedKey.cipherText.toString(),
            encryptedValue.cipherText.toString());
      } else {
        if (await _isMasterKeyAvailable() &&
            _areSubKeysAvailable() == false) {
          await _deleteMasterKey();
        }
        var masterKey = await _createMasterKey();
        await _saveMasterKeyToKeychain(masterKey);
        await _generateAndSaveKeyAndValueSubKeys(
            await _getMasterKeyFromKeyChain());
        putString(key, val, isEncrypted:isEncrypted);
        //throw Exception("Failed to save data something is not correct, please report issue on github");
      }
    } else {
      throw PlatformException(
          message: "Not Supported for ${Platform.operatingSystem} platform",
          code: "501");
    }
  } else {
    _sharedPreferences.setString(key, val);
  }
}