Hard Disk — Sentinel Activation Key File

return filePath; }

private static byte[] Encrypt(string plainText) { // Implement encryption logic here // For example, using Aes encryption using var aes = Aes.Create(); aes.GenerateKey(); aes.GenerateIV();

// Decrypt the file content var decryptedContent = Decrypt(fileContent); Hard Disk Sentinel Activation Key File

return ms.ToArray(); }

var encryptor = aes.CreateEncryptor(aes.Key, aes.IV); using var ms = new MemoryStream(); ms.Write(aes.IV, 0, aes.IV.Length); using var cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write); using var sw = new StreamWriter(cs); sw.Write(plainText); } var encryptor = aes.CreateEncryptor(aes.Key

// Validate the activation key file var isValid = ActivationKeyFile.ValidateActivationKeyFile(activationKeyFilePath, licenseKey); Console.WriteLine($"Activation key file is valid: {isValid}"); } }

// Validate the license key var contentParts = decryptedContent.Split(':'); return contentParts[0] == licenseKey; } using var ms = new MemoryStream()

public static bool ValidateActivationKeyFile(string filePath, string licenseKey) { // Read the activation key file var fileContent = File.ReadAllBytes(filePath);

public static string GenerateActivationKeyFile(string licenseKey, string userName) { // Generate a unique activation key file var activationKey = Guid.NewGuid().ToString(); var fileContent = $"{licenseKey}:{activationKey}:{userName}";

public class ActivationKeyFile { private const string ActivationKeyFileExtension = ".hdsak";