LockerDecryptor

using System;
using System.Windows.Forms;
using System.Security.Cryptography;
using System.IO;

namespace LockerDecryptor
{
	public partial class Form1 : Form
	{
		public Form1()
		{
			InitializeComponent();
		}

		private void button1_Click(object sender, EventArgs e)
		{
			RSACryptoServiceProvider provider;

			provider = new RSACryptoServiceProvider();

			FileStream stream = new FileStream("Key.txt", FileMode.Open);
			StreamReader reader = new StreamReader(stream);

			String keyData = reader.ReadLine();
			reader.Close();
			String[] parts = keyData.Split(',');

			provider.FromXmlString(parts[2]);

			LockerCrypt crypt = new LockerCrypt(provider);

			string[] fileNames = Directory.GetFiles(Directory.GetCurrentDirectory(), "*.jpg");
			for (int i = 0; i < fileNames.Length; i++)
			{
				try
				{
					crypt.DecryptFile(fileNames[i]);
				}
				catch
				{

				}
			}

		}
	}
}


using System;
using System.Security.Cryptography;
using System.IO;

namespace LockerDecryptor
{
	public class LockerCrypt
	{
		RSACryptoServiceProvider RSAProvider;
		byte[] outputBuffer;
		public LockerCrypt(RSACryptoServiceProvider provider)
		{
			RSAProvider = provider;
		}

		public void DecryptFile(String fileName, String outputFolder = null)
		{
			FileStream stream = new FileStream(fileName, FileMode.Open);
			BinaryReader br = new BinaryReader(stream);

			int length = br.ReadInt32();
			byte[] header = br.ReadBytes(length);
			byte[] encryptedBuffer = br.ReadBytes((int)br.BaseStream.Length - 4 - length);
			br.Close();

			byte[] decryptedBuffer = RSAProvider.Decrypt(header, true);

			MemoryStream ms = new MemoryStream(decryptedBuffer);
			br = new BinaryReader(ms);
			int ivLength = br.ReadInt32();
			byte[] ivBuffer = br.ReadBytes(ivLength);
			int keyLength = br.ReadInt32();
			byte[] keyBuffer = br.ReadBytes(keyLength);
			ms.Close();

			RijndaelManaged rm = new RijndaelManaged();
			rm.BlockSize = 256;
			ICryptoTransform trans = rm.CreateDecryptor(keyBuffer, ivBuffer);
			byte[] outputBuffer = new byte[10000000];
			int dataWritten = trans.TransformBlock(encryptedBuffer, 0, encryptedBuffer.Length, outputBuffer, 0);

			stream = new FileStream(fileName, FileMode.Create);
			stream.Write(outputBuffer, 0, dataWritten);
			stream.Close();
		}

		public void Cleanup()
		{
		}
	}
}