authenticate method

Future<void> authenticate({
  1. required List<int> key,
})

Authenticates with a Mifare Ultralight C RFID tag using a 3DES key.

This method performs a secure authentication operation on the RFID tag using Triple DES (3DES) encryption. It requires a 16-byte key for the encryption process, ensuring that the authentication process is secure and that only authorized entities can access the tag's protected features and data.

Parameters

  • key: A list of integers representing the 16-byte 3DES key used for authentication. Each byte must be within the valid range (0x00 to 0xFF).

Throws

  • Exception if the provided key does not meet the required length of 16 bytes, or if any byte in the key is outside the valid range.
  • RFIDException if there's an error during the authentication process, which could be due to issues with the key, communication problems with the RFID reader, or the tag's response to the authentication attempt.

Example

try {
  await card.authenticate(key: [0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF]);
  print('Authentication successful');
} catch (e) {
  print('Authentication failed: $e');
}

Note: The key must be carefully managed and securely stored to prevent unauthorized access. The use of 3DES for authentication provides a higher level of security compared to simpler encryption methods, making it suitable for applications that require secure access control and data protection.

Implementation

Future<void> authenticate({required List<int> key}) async {
  if (key.length != 16) {
    throw Exception('Invalid key length');
  }

  try {
    validateByteList(key);
  } catch (e) {
    throw Exception('Invalid key. Each byte must be within 0x00 and 0xFF');
  }

  try {
    await reader.authenticate3DES(
      key: key,
    );
  } catch (e) {
    throw RFIDException('Error authenticating: ${e.toString()}');
  }
}