/// <summary>
/// Decrypts MemoryStream using PGP.
/// </summary>
/// <param name="encryptedStream">MemoryStream containing data to be decrypted</param>
/// <param name="privateKeyFile">Path to the private key file. Usually a .asc file.</param>
/// <param name="privateKeyPassword">Password to use.</param>
/// <returns>MemoryStream containing decrypted data.</returns>
/// <remarks>MemoryStream containing encrypted data must be ascii armored.</remarks>
public MemoryStream DecryptStream(MemoryStream encryptedStream, string privateKeyFile, string privateKeyPassword)
{
MemoryStream decryptedStream = new MemoryStream();
FileStream privateKeyStream = File.OpenRead(privateKeyFile);
_pgp.DecryptStream(encryptedStream, privateKeyStream, privateKeyPassword, decryptedStream);
return(decryptedStream);
}
private void DecryptButton_Click(object sender, RoutedEventArgs e)
{
string encryptedmessage = new TextRange(EncryptedMessageTextbox.Document.ContentStart, EncryptedMessageTextbox.Document.ContentEnd).Text;
string password = PasswordBox.Text;
string privatekey = new TextRange(PrivateKeyTextbox.Document.ContentStart, PrivateKeyTextbox.Document.ContentEnd).Text;
if (encryptedmessage == String.Empty)
{
MessageBox.Show("Keine Nachricht eingegeben");
}
if (privatekey == String.Empty)
{
MessageBox.Show("Keinen Private Key eingegeben");
}
PGPLib pGPLib = new PGPLib();
MemoryStream decrypted = new MemoryStream();
using (MemoryStream encryptedmessagestream = new MemoryStream(Encoding.UTF8.GetBytes(encryptedmessage)))
{
using (MemoryStream privatekeystream = new MemoryStream(Encoding.UTF8.GetBytes(privatekey)))
{
string test = pGPLib.DecryptStream(encryptedmessagestream, privatekeystream, password, decrypted);
decrypted = new MemoryStream(decrypted.ToArray());
StreamReader streamReader = new StreamReader(decrypted);
string decryptedtext = streamReader.ReadToEnd();
DecryptedMessageBox.Text = "";
DecryptedMessageBox.Text = decryptedtext;
}
}
}