C#中的BouncyCastle内存PGP加密

Question

我一直在尝试使用BouncyCastle库来进行PGP加密/解密。我有一些代码需要修改，以便只使用流-不使用文件。

我尝试移除pgputilities.writeFileToliteralData()，然后让它返回一个流，但没有成功（输出流为空）。

这里更明确的是方法应该是什么：

public static Stream EncryptFile(MemoryStream inputStream, PgpPublicKey encKey, bool withIntegrityCheck)

下面是我需要修改的代码：

private static void EncryptFile(Stream outputStream, string fileName, PgpPublicKey encKey, bool armor, bool withIntegrityCheck)
{

    if (armor)
        outputStream = new ArmoredOutputStream(outputStream);

    try
    {
        MemoryStream bOut = new MemoryStream();
        PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(
        CompressionAlgorithmTag.Zip);
        PgpUtilities.WriteFileToLiteralData(
        comData.Open(bOut),
        PgpLiteralData.Binary,
        new FileInfo(fileName));
        comData.Close();
        PgpEncryptedDataGenerator cPk = new PgpEncryptedDataGenerator(
        SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
        cPk.AddMethod(encKey);
        byte[] bytes = bOut.ToArray();
        Stream cOut = cPk.Open(outputStream, bytes.Length);
        cOut.Write(bytes, 0, bytes.Length);
        cOut.Close();
        if (armor)
            outputStream.Close();
    }

    catch (PgpException e)
    {

        Console.Error.WriteLine(e);
        Exception underlyingException = e.InnerException;
        if (underlyingException != null)
        {

            Console.Error.WriteLine(underlyingException.Message);
            Console.Error.WriteLine(underlyingException.StackTrace);

        }
    }
}

public void EncryptFile(string filePath, string publicKeyFile, string pathToSaveFile)
{
    Stream keyIn, fos;
    keyIn = File.OpenRead(publicKeyFile);
    string[] fileSplit = filePath.Split('\\');
    string fileName = fileSplit[fileSplit.Length - 1];
    fos = File.Create(pathToSaveFile + fileName + ".asc");
    EncryptFile(fos, filePath, ReadPublicKey(keyIn), true, true);
    keyIn.Close();
    fos.Close();
}

Answer 1

公认的解决方案将在使用弹性城堡时起作用。然而，对于任何寻找更简单（？！）解决方案-看看PgpCore nuget。这是一个包装围绕弹力城堡，只是使它更容易，而不需要知道它的内部。

// Encrypting a stream using PgpCore
using(PGP pgp = new PGP())
{
    using (FileStream inputFileStream = new FileStream(@"C:\TEMP\keys\content.txt", FileMode.Open))
    using (Stream outputFileStream = File.Create(@"C:\TEMP\keys\content__encrypted2.pgp"))
    using (Stream publicKeyStream = new FileStream(@"C:\TEMP\keys\public.asc", FileMode.Open))
        pgp.EncryptStream(inputFileStream, outputFileStream, publicKeyStream, true, true);
}