private static Stream ChainEncryptedOut(Stream outputStream, PgpEncryptionKeys m_encryptionKeys)
{
PgpEncryptedDataGenerator encryptedDataGenerator;
encryptedDataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.TripleDes, new SecureRandom());
encryptedDataGenerator.AddMethod(m_encryptionKeys.PublicKey);
return(encryptedDataGenerator.Open(outputStream, new byte[BufferSize]));
}
/*
* Encrypt and sign the file pointed to by unencryptedFileInfo and
*/
public static void EncryptAndSign(string inputFile, string outputFile, string publicKeyFile, string privateKeyFile, string passPhrase, bool armor)
{
PgpEncryptionKeys encryptionKeys = new PgpEncryptionKeys(publicKeyFile, privateKeyFile, passPhrase);
if (!File.Exists(inputFile))
{
throw new FileNotFoundException(String.Format("Input file [{0}] does not exist.", inputFile));
}
if (!File.Exists(publicKeyFile))
{
throw new FileNotFoundException(String.Format("Public Key file [{0}] does not exist.", publicKeyFile));
}
if (!File.Exists(privateKeyFile))
{
throw new FileNotFoundException(String.Format("Private Key file [{0}] does not exist.", privateKeyFile));
}
if (String.IsNullOrEmpty(passPhrase))
{
throw new ArgumentNullException("Invalid Pass Phrase.");
}
if (encryptionKeys == null)
{
throw new ArgumentNullException("Encryption Key not found.");
}
using (Stream outputStream = File.Create(outputFile))
{
if (armor)
{
using (ArmoredOutputStream armoredOutputStream = new ArmoredOutputStream(outputStream))
{
OutputEncrypted(inputFile, armoredOutputStream, encryptionKeys);
}
}
else
{
OutputEncrypted(inputFile, outputStream, encryptionKeys);
}
}
}
private static void OutputEncrypted(string inputFile, Stream outputStream, PgpEncryptionKeys encryptionKeys)
{
using (Stream encryptedOut = ChainEncryptedOut(outputStream, encryptionKeys))
{
FileInfo unencryptedFileInfo = new FileInfo(inputFile);
using (Stream compressedOut = ChainCompressedOut(encryptedOut))
{
PgpSignatureGenerator signatureGenerator = InitSignatureGenerator(compressedOut, encryptionKeys);
using (Stream literalOut = ChainLiteralOut(compressedOut, unencryptedFileInfo))
{
using (FileStream inputFileStream = unencryptedFileInfo.OpenRead())
{
WriteOutputAndSign(compressedOut, literalOut, inputFileStream, signatureGenerator);
inputFileStream.Close();
}
}
}
}
}
private static PgpSignatureGenerator InitSignatureGenerator(Stream compressedOut, PgpEncryptionKeys m_encryptionKeys)
{
const bool IsCritical = false;
const bool IsNested = false;
PublicKeyAlgorithmTag tag = m_encryptionKeys.SecretKey.PublicKey.Algorithm;
PgpSignatureGenerator pgpSignatureGenerator = new PgpSignatureGenerator(tag, HashAlgorithmTag.Sha1);
pgpSignatureGenerator.InitSign(PgpSignature.BinaryDocument, m_encryptionKeys.PrivateKey);
foreach (string userId in m_encryptionKeys.SecretKey.PublicKey.GetUserIds())
{
PgpSignatureSubpacketGenerator subPacketGenerator = new PgpSignatureSubpacketGenerator();
subPacketGenerator.SetSignerUserId(IsCritical, userId);
pgpSignatureGenerator.SetHashedSubpackets(subPacketGenerator.Generate());
// Just the first one!
break;
}
pgpSignatureGenerator.GenerateOnePassVersion(IsNested).Encode(compressedOut);
return(pgpSignatureGenerator);
}
