I have used the binary Reader to read the binary files instead of the stream writer in the Wrapper class and have overloaded the Execute command to accept char bytes as input instead of string. However i am facing problem in decrypting the binary files.I can see this working fine for ASCII files but binary files are not decrypting. Hi,I am using your wrapper class for Decryption.Thanks for the articles. Obviously I've tinkered with the code, adding support for working with files and using the shorter switch codes, but this same problem was happening with the original source as well.Īny ideas on why the keyblock resource error is coming up? If I copy the bold part of the message and paste it after gpg.exe on the command line, it prompts me for the passphrase for When I enter it, the pgp file is successfully created. Gpg: keyblock resource `C:/GnuPG" -se -a -r -u -no-verbose -o //myserver/encryption/ //myserver/encryption/sample.txt \secring.gpg': file open error I can successfully encrypt and decrypt files with both pairs using gpg.exe.īut when I try to encrypt or decrypt with GnuPGWrapper, I get this message: I installed GnuPG and I've added 2 key pairs. I've just started using this component, but I'm having some difficulties. For more about OpenPGP (RFC 2440), please refer to. You can check the command line manual page for gpg.exe.įor more about GNU, please refer to. This class has been developed and tested with GnuPG v1.2.0 (MingW32). Uses a configurable passphrase, which can be stored in a local configuration file ( Web.Config) to prevent disclosure of the phrase.Uses configurable timeouts to prevent blocking calling applications in case of a system/program/process crash.Uses multiple threads to read data from standard input and standard error, preventing any deadlocks.Doesn't use any temporary files to store results it directly uses streams/pipes.Display error message // Contains a clear text error message, // either from the wrapper or from gpg.exe itself Gpg.ExecuteCommand( " This is a test message.", out outputText) Execute GnuPG string outputText = " " Gpg.originator = " = " = Commands.SignAndEncrypt Gpg.passphrase = " My passphrase is so cool I can't remember it" Gpg.homedirectory = " C:\Inetpub\wwwroot\GnuPGDotNet\GnuPG" The next sections show sample source code for the most command operation ( SignAndEncrypt, Decrypt, Verify). Call the ExecuteCommand method with input/output strings variables.Optionally, set parameters for the command (home directory, originator, recipients, etc.).Set the command property to the requested command ( SignAndEncrypt, Encrypt, Decrypt, Sign, Verify).In order to use the wrapper class, you need to proceed as follows: Please note that you must have INSTALLED GnuPG AND generated/imported the appropriate keys before using this class. The GnuPG Wrapper executes the command line program ( gpg.exe) in a different process, redirects standard input ( stdin), standard output ( stdout) and standard error ( stderr) streams, and monitors the streams to fetch the results of the encryption/signing operation. Although suitable for scripting on UNIX systems (where calling a command line program from sh or bash is easy), it's pretty hard to integrate this in a production. GnuPG ships as a command line program ( gpg.exe) acting as a filter (reads from standard input and writes into standard output). Using Administrative Tools / Internet Information Services, create an IIS Application for directory GnuPGDotNet.Download the zip file ( GnuPGDotNet_src.zip).It is shipped with a demo ASP.NET Web Form ( GnuPG.aspx) which calls the wrapper class. This article provides a C# wrapper class ( GnuPGWrapper) that will enable use of OpenPGP Internet encryption standard within a. As such, GnuPG is a complete and free replacement for PGP (Pretty Good Privacy). It includes an advanced key management facility and is compliant with the proposed OpenPGP Internet standard as described in RFC 2440. It can be used to encrypt data and to create digital signatures. GnuPG stands for GNU Privacy Guard and is GNU's tool for secure communication and data storage. This article presents GnuPGWrapper v1.0, a wrapper class for GnuPG. Download source and demo files - 535 Kb.
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