Tag: PublicPrivateKeyPairEncryption

Hi Folks,

Thank you for visiting my blog today…this is post is mainly for Pro developers. Encryption is crucial to maintain the confidentiality in this digital age for the security of our sensitive information. So here is a blog about it. This is in continuation to my previous blog post on encrypting files using GnuPG.

In this blog post, I will give you sample how you can encrypt/decrypt using GnuPG with command line scripts from C# code.

If you didn’t go through my previous article, I strongly recommend you go through that article below first to understand the background.

Installing GnuPG – Your open-source software companion to encrypt/decrypt files for your Power Platform Integrations

Next, in order to encrypt/decrypt a given csv file (taken for simplicity), we can use the following C# codes. For illustration purpose, I have just provided you the logic in the form of a Console.

Encryption:

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading.Tasks;
	using System.Diagnostics;
	namespace eHintsBatchDecryptionTest
	{
	class Program
	{
	static void Main(string[] args)
	{
	string gpgPath = @"D:\Softwares\Kleo Patra\GnuPG\bin\gpg.exe"; //This is the place where you have installed GnuPG Software
	string inputFile = "location of input file";
	string outputFile = "location of output file";
	string passphrase = "passPhrase";
	DecryptGPGFile(gpgPath, inputFile, outputFile, passphrase);
	}
	static void DecryptGPGFile(string gpgPath, string inputFile, string outputFile, string passphrase)
	{
	using (Process process = new Process())
	{
	process.StartInfo.FileName = gpgPath;
	process.StartInfo.Arguments = $"–batch –yes –pinentry-mode=loopback –passphrase {passphrase} -d -o \"{outputFile}\" \"{inputFile}\"";
	process.StartInfo.UseShellExecute = false;
	process.StartInfo.RedirectStandardOutput = true;
	process.StartInfo.RedirectStandardError = true;
	process.StartInfo.RedirectStandardInput = true;
	process.StartInfo.CreateNoWindow = true;
	process.Start();
	string output = process.StandardOutput.ReadToEnd();
	string error = process.StandardError.ReadToEnd();
	process.WaitForExit();
	if (process.ExitCode == 0)
	{
	Console.WriteLine("Decryption successful.");
	}
	else
	{
	Console.WriteLine("Decryption failed. Error: " + error);
	}
	}
	}
	}
	}

view raw Encrypt csv file using GnuPG from C# using command line hosted with ❤ by GitHub

Decryption:

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading.Tasks;
	using System.Diagnostics;
	namespace BatchDecryptionTest
	{
	class Program
	{
	static void Main(string[] args)
	{
	string gpgPath = @"D:\Softwares\Kleo patra\GnuPG\bin\gpg.exe";//Once GPG installed, you can look for gpg.exe in the bin folder of the installation
	string inputFile = "Input encrypted file";//Replace with your gpg encrypted file location
	string outputFile = "Decrypted CSV file"; //give it a name for the decrypted file and location, output file path doesnt exists yet, you may give a sample name
	string passphrase = "passPhrase";
	DecryptGPGFile(gpgPath, inputFile, outputFile, passphrase);
	}
	static void DecryptGPGFile(string gpgPath, string inputFile, string outputFile, string passphrase)
	{
	using (Process process = new Process())
	{
	process.StartInfo.FileName = gpgPath;
	process.StartInfo.Arguments = $"–batch –yes –pinentry-mode=loopback –passphrase {passphrase} -d -o \"{outputFile}\" \"{inputFile}\""; //Pass the PassPhrase, Input and Output file paths as parameters
	process.StartInfo.UseShellExecute = false;
	process.StartInfo.RedirectStandardOutput = true;
	process.StartInfo.RedirectStandardError = true;
	process.StartInfo.RedirectStandardInput = true;
	process.StartInfo.CreateNoWindow = true;
	process.Start();
	string output = process.StandardOutput.ReadToEnd();
	string error = process.StandardError.ReadToEnd();
	process.WaitForExit();
	if (process.ExitCode == 0)
	{
	Console.WriteLine("Decryption successful.");
	}
	else
	{
	Console.WriteLine("Decryption failed. Error: " + error);
	}
	}
	}
	}
	}

view raw Decrypt csv file using GnuPG from C# using command line hosted with ❤ by GitHub

All you need is to copy and replace the file locations in the code. Sit back and enjoy encrypting and decrypting with GnuPG. I should say once known, this is the easiest way to encrypt/decrypt from C# code, no strings attached.

If you need any other information, please do let me know in comments.

Cheers,

PMDY