ComponentFactory.Krypton.Ribbon.EncryptedLicenseProvider.GetLicense C# (CSharp) Method

        internal EncryptedLicense GetLicense(string licenseKey, string password)
        {
            try
            {
                byte[] encData = FromHex(licenseKey);
                byte[] requiredToken = { 0x3E, 0x7E, 0x8E, 0x37, 0x44, 0xA5, 0xC1, 0x3F };
                byte[] publicKeyToken = Assembly.GetExecutingAssembly().GetName().GetPublicKeyToken();

                // Validate this assembly - if it isn't signed with the correct public key
                // then copy rubbish into the key.  This is to make it just a little more
                // difficult for the casual hacker.
                //
            #if CHECK_PUBLIC_KEY

                if (!ArrayEqual(publicKeyToken, requiredToken))
                {
                    _desKey.CopyTo(requiredToken, 0);
                }
            #endif

                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                des.Key = _desKey;
                des.IV = _desIV;

                byte[] data = des.CreateDecryptor().TransformFinalBlock(encData, 0, encData.Length);

                // extract the encryption key and encrypted product data - note that the encryption
                // key has only 7 significant bytes
                //
                byte[] encryptionKey = new byte[ArraySize(8)];
                byte[] encPayload = new byte[ArraySize(data.Length - keyLength)];

                Array.Copy(data, 0, encryptionKey, 0, keyLength);
                Array.Copy(data, keyLength, encPayload, 0, encPayload.Length);

                // validate that the password matches that passed in
                //
                byte[] requiredEncryptionKey = GetEncryptionKey(password);
                if (!ArrayEqual(encryptionKey, requiredEncryptionKey))
                {
                    return null;
                }

                // decrypt the payload using the encryption key
                //
                des.IV = encryptionKey;
                byte[] payload = des.CreateDecryptor().TransformFinalBlock(encPayload, 0, encPayload.Length);
                byte[] productData = new byte[ArraySize(payload.Length - 2)];
                Array.Copy(payload, 2, productData, 0, productData.Length);

                UInt16 serialNo = BitConverter.ToUInt16(payload, 0);
                string productInfo = System.Text.ASCIIEncoding.UTF8.GetString(productData);

                return new EncryptedLicense(licenseKey, serialNo, productInfo);
            }
            catch
            {
                return null;
            }
        }