public void DecryptFile(string sourceName, string targetName)
{
var sourceInfo = new FileInfo(sourceName);
if (!sourceInfo.Exists)
{
throw new FileNotFoundException("Source File was not found or has been deleted.", sourceName);
}
var targetInfo = new FileInfo(targetName);
if (targetInfo.Exists)
{
var message = string.Format("Target File \"{0}\" already exists.", targetName);
throw new InvalidOperationException(message);
}
SBUtils.Unit.SetLicenseKey(SBUtils.Unit.BytesOfString(License));
var privateRing = new SBPGPKeys.TElPGPKeyring();
lock (typeof(SBPGPKeys.TElPGPKeyring))
{
privateRing.Load(encryptionKey, signatureKey, true);
}
var reader = new TElPGPReader
{
DecryptingKeys = privateRing,
VerifyingKeys = privateRing,
KeyPassphrase = passphrase,
};
try
{
using (var sourceStream = sourceInfo.OpenRead())
using (var targetStream = targetInfo.Create())
using (reader)
{
reader.OutputStream = targetStream;
reader.DecryptAndVerify(sourceStream, 0);
}
}
catch (Exception)
{
targetInfo.Refresh();
if (targetInfo.Exists)
{
targetInfo.Delete();
}
throw;
}
}
private bool Decrypt(string sourceFile)
{
bool bSuccess = false;
FileStream streamInput = null;
string pgpFile = sourceFile.Replace(".pgp", "");
try
{
streamInput = new FileStream(sourceFile, FileMode.Open);
FileStream streamOutput = new FileStream(pgpFile, FileMode.Create);
try
{
// pgpReader
TElPGPReader _pgpReader = new TElPGPReader()
{
KeyPassphrase = null,
OutputStream = streamOutput,
//assgin keyrings to reader
DecryptingKeys = Keyring,
VerifyingKeys = Keyring,
};
_pgpReader.OnKeyPassphrase += new SBPGPStreams.TSBPGPKeyPassphraseEvent(this.pgpReader_OnKeyPassphrase);
//pgpReader.Passphrase = PassPhrase; //setting PassPhrase here did not work.
_pgpReader.DecryptAndVerify(streamInput, 0);
bSuccess = true;
}
catch (Exception ex)
{
Task asyncTask = WriteToLogFileAsync(string.Format("Sourcefile:{0} Error:{1}", sourceFile, ex.Message));
throw;
}
finally
{
if (streamOutput != null)
{
streamOutput.Close();
}
}
}
catch (Exception ex)
{
Task asyncTask = WriteToLogFileAsync(string.Format("Sourcefile:{0} Error:{1}", sourceFile, ex.Message));
throw;
}
finally
{
if (streamInput != null)
{
streamInput.Close();
}
}
if (bSuccess)
{
new FileInfo(pgpFile).LastWriteTime = new FileInfo(sourceFile).LastWriteTime;
new FileInfo(pgpFile).CreationTime = new FileInfo(sourceFile).CreationTime;
}
return(bSuccess);
}
