deriveAndStoreKey method

Future<EncryptionOptions> deriveAndStoreKey({ required String password, String? keyName, EncryptionAlgorithm algorithm = EncryptionAlgorithm.aes256, int iterations = 10000, })

Derives a key from a password and stores it in secure storage.

The password parameter is the password to derive the key from. The keyName parameter can be used to specify a custom name for the key. If not provided, a default name will be used.

Returns the generated encryption options.

Implementation

Future<EncryptionOptions> deriveAndStoreKey({
  required String password,
  String? keyName,
  EncryptionAlgorithm algorithm = EncryptionAlgorithm.aes256,
  int iterations = 10000,
}) async {
  // Generate a random salt
  final salt = _generateRandomString(16);
  final effectiveKeyName = keyName ?? _defaultKeyName;

  // Derive the key
  final key = Encryption.deriveKeyFromPassword(
    password: password,
    salt: salt,
    iterations: iterations,
  );

  // Store the key and salt
  await _secureStorage.write(
    key: _getKey(effectiveKeyName),
    value: key,
  );

  await _secureStorage.write(
    key: _getKey(_defaultSaltName),
    value: salt,
  );

  await _secureStorage.write(
    key: _getKey(_defaultAlgorithmName),
    value: algorithm.toString().split('.').last,
  );

  _log.info('Derived and stored encryption key: $effectiveKeyName');

  return EncryptionOptions(
    algorithm: algorithm,
    key: key,
  );
}