private void CheckLiteralData(
PgpLiteralData ld,
byte[] data)
{
if (!ld.FileName.Equals(PgpLiteralData.Console))
throw new Exception("wrong filename in packet");
Stream inLd = ld.GetDataStream();
byte[] bytes = Streams.ReadAll(inLd);
if (!AreEqual(bytes, data))
{
Fail("wrong plain text in decrypted packet");
}
}
/*
* PGP decrypt a given stream.
*/
private void DecryptStream(Stream inputStream, Stream outputStream, Stream privateKeyStream, string passPhrase)
{
if (inputStream == null)
{
throw new ArgumentException("InputStream");
}
if (outputStream == null)
{
throw new ArgumentException("outputStream");
}
if (privateKeyStream == null)
{
throw new ArgumentException("privateKeyStream");
}
if (passPhrase == null)
{
passPhrase = string.Empty;
}
PgpObjectFactory objFactory = new PgpObjectFactory(PgpUtilities.GetDecoderStream(inputStream));
// find secret key
PgpSecretKeyRingBundle pgpSec = new PgpSecretKeyRingBundle(PgpUtilities.GetDecoderStream(privateKeyStream));
PgpObject obj = null;
if (objFactory != null)
{
obj = objFactory.NextPgpObject();
}
// the first object might be a PGP marker packet.
PgpEncryptedDataList enc = null;
if (obj is PgpEncryptedDataList)
{
enc = (PgpEncryptedDataList)obj;
}
else
{
enc = (PgpEncryptedDataList)objFactory.NextPgpObject();
}
// decrypt
PgpPrivateKey privateKey = null;
PgpPublicKeyEncryptedData pbe = null;
foreach (PgpPublicKeyEncryptedData pked in enc.GetEncryptedDataObjects())
{
privateKey = PGPKeyHelper.FindSecretKey(pgpSec, pked.KeyId, passPhrase.ToCharArray());
if (privateKey != null)
{
pbe = pked;
break;
}
}
if (privateKey == null)
{
throw new ArgumentException("Secret key for message not found.");
}
PgpObjectFactory plainFact = null;
using (Stream clear = pbe.GetDataStream(privateKey))
{
plainFact = new PgpObjectFactory(clear);
}
PgpObject message = plainFact.NextPgpObject();
if (message is PgpOnePassSignatureList)
{
message = plainFact.NextPgpObject();
}
if (message is PgpCompressedData)
{
PgpCompressedData cData = (PgpCompressedData)message;
PgpObjectFactory of = null;
using (Stream compDataIn = cData.GetDataStream())
{
of = new PgpObjectFactory(compDataIn);
}
message = of.NextPgpObject();
if (message is PgpOnePassSignatureList)
{
message = of.NextPgpObject();
PgpLiteralData Ld = null;
Ld = (PgpLiteralData)message;
Stream unc = Ld.GetInputStream();
Streams.PipeAll(unc, outputStream);
}
else
{
PgpLiteralData Ld = null;
Ld = (PgpLiteralData)message;
Stream unc = Ld.GetInputStream();
Streams.PipeAll(unc, outputStream);
}
}
else if (message is PgpLiteralData)
{
PgpLiteralData ld = (PgpLiteralData)message;
string outFileName = ld.FileName;
Stream unc = ld.GetInputStream();
Streams.PipeAll(unc, outputStream);
}
else if (message is PgpOnePassSignatureList)
{
throw new PgpException("Encrypted message contains a signed message - not literal data.");
}
else
{
throw new PgpException("Message is not a simple encrypted file.");
}
}
