public static void DoDecrypt()
{
// Open the file.
if (FileName != null && FileName.Length >= 0)
{
fStream = new FileStream(FileName, FileMode.OpenOrCreate);
}
else
{
FileName = "Data.dat";
fStream = new FileStream("Data.dat", FileMode.Open);
}
FileInfo f = new FileInfo(FileName);
int bytesWritten = Convert.ToInt32(f.Length);
// Create some random entropy.
if (entropy == null)
{
entropy = EntropyGenerator.GetIP();
}
;
// Read from the stream and decrypt the data.
byte[] decryptData = DecryptDataFromStream(entropy, DataProtectionScope.LocalMachine, fStream, bytesWritten);
if (decryptData != null)
{
decryptedData = UnicodeEncoding.ASCII.GetString(decryptData);
}
else
{
decryptedData = null;
}
fStream.Close();
}
public static void DoEncrypt()
{
///////////////////////////////
//
// Data Encryption - ProtectedData
//
///////////////////////////////
// Create the original data to be encrypted
// byte[] toEncrypt = UnicodeEncoding.ASCII.GetBytes("This is some data of any length.");
byte[] toEncrypt = UnicodeEncoding.ASCII.GetBytes(encryptedData);
// Create a file.
if (FileName != null && FileName.Length == 0)
{
FileName = Environment.GetFolderPath(Environment.SpecialFolder.System) + @"\DataLicense.dat";
}
fStream = new FileStream(FileName, FileMode.OpenOrCreate);
// Create some random entropy.
if (entropy == null)
{
entropy = EntropyGenerator.GetIP();
}
// Encrypt a copy of the data to the stream.
int bytesWritten = EncryptDataToStream(toEncrypt, entropy, DataProtectionScope.LocalMachine, fStream);
fStream.Close();
}
