private static string DecryptString(Rsa rsaKey, string encryptedText)
{
Debug.Assert(rsaKey != null);
Debug.Assert(!string.IsNullOrEmpty(encryptedText));
byte[] encryptedBytes = LicenseManager.BytesFromString(encryptedText);
byte[] decryptedBytes = rsaKey.Decrypt(encryptedBytes);
return(Encoding.UTF8.GetString(decryptedBytes));
}
protected sealed override LicenseError Validate()
{
if (_verified)
{
Byte[] encryptedBytes = LicenseManager.BytesFromString(Data);
Byte[] bytes = ProtectedData.Unprotect(encryptedBytes, null, DataProtectionScope.LocalMachine);
if (new Guid(bytes) != Guid)
{
_error = new LicenseError(Assembly, LicenseErrorReason.InvalidLicense, Messages.InvalidMachineData, this);
}
_verified = true;
}
return(_error);
}
internal string Decrypt(string encryptedText)
{
if (IsEmpty)
{
Byte[] bytes = Convert.FromBase64String(encryptedText);
return(Encoding.UTF8.GetString(bytes));
}
byte[] input = LicenseManager.BytesFromString(encryptedText);
byte[] output;
using (TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider())
{
output = Transform(input, des.CreateDecryptor(GetTripleDesKey(_key), GetTripleDesIv(_key)));
}
return(Encoding.UTF8.GetString(output));
}