rossknudsen / pgpsharp

Some pgp stuff in C#

About PgpSharp

This project is an attempt at providing very basic PGP functionality through a C# interface, including listing keys, encrypting/signing data, and decrypting data. It does not generate or manage keys at the moment.

Get it on NuGet

See the package page, or run

Install-Package PgpSharp

Using the lib

The main interface to use is IPgpTool. The lib provides a default impelementation that merely wraps around the GnuPG binary for windows and can be instantiated like this:

IPgpTool tool = new GnuPGTool();

By default the GnuPGTool will try to find the GnuPG binary in the standard install folder. To override the binary file path set this property:

GnuPGConfig.GnuPGExePath = @"your\path\to\gpg2.exe";

To encrypt/sign/decrypt data, you would use the ProcessData() method of the interface, and you have the option of using the StreamDataInput (for processing streams) or FileDataInput (for processing files).

// example encrypting a file
var encryptArg = new FileDataInput
{
    Armor = true,
    InputFile = @"path\to\src\file",
    OutputFile = @"path\to\output\file",
    Operation = DataOperation.Encrypt,
    Recipient = "recipient's key id",
};
tool.ProcessData(encryptArg);

// example decrypting a file
SecureString yourPassphrase = ... // somehow generate it
var decryptArg = new FileDataInput
{
    InputFile = @"path\to\encrypted\file",
    OutputFile = @"path\to\output\file",
    Operation = DataOperation.Decrypt,
    Passphrase = yourPassphrase
};
tool.ProcessData(decryptArg);

Details on which properties to use for different sign/encrypt/decrypt operation is available in the intellisense of that property. The sample WPF project also allows you to play with the different operations.