DECRYPTION DES PWD AIM

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft.Win32;

namespace WindowsApplication15
{
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.ListBox listBox1;
	
		public Form1()
		{
			InitializeComponent();
		}

		private void InitializeComponent()
		{
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label1 = new System.Windows.Forms.Label();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(16, 96);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(240, 20);
			this.textBox2.TabIndex = 2;
			this.textBox2.Text = "";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(16, 16);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(240, 20);
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(96, 48);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(72, 40);
			this.button1.TabIndex = 1;
			this.button1.Text = "decrypter";
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(16, 152);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(272, 24);
			this.button2.TabIndex = 3;
			this.button2.Text = "Recuperer tous les login et pwd AIM du PC";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// listBox1
			// 
			this.listBox1.Location = new System.Drawing.Point(16, 176);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(272, 95);
			this.listBox1.TabIndex = 4;
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
																					this.textBox1,
																					this.textBox2,
																					this.button1});
			this.groupBox1.Location = new System.Drawing.Point(16, 16);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(272, 128);
			this.groupBox1.TabIndex = 5;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "decrypter un pass";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 280);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(272, 32);
			this.label1.TabIndex = 6;
			this.label1.Text = "Si la mention \"Compte faux\" apparait c que le compte n\'est pas valide";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(296, 308);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.label1,
																		  this.groupBox1,
																		  this.listBox1,
																		  this.button2});
			this.Name = "Form1";
			this.Text = "AIM Pass Converter";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
	
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		public string Convertion(string PW)
		{
			int a; int b; int c; int d;
			string password = "";
			int decrypt = ( PW.Length / 2 );
			
			for( a = 1 ; PW.Length > a ; a = a + 2) 
			{
				c = ( a / 2) % ( 16 + 1) + 1;
				b = Convert.ToInt16( Convert.ToChar( PW.Substring( a - 1, 1) )  ) - 65  ;

				if ( (c==4) || (c==9) || (c==11) || (c==14) )
				{
					if ( (b % 2) < 1 )
					{
						b = b + 1;
					}
					else
					{
						b = b - 1;
					}
				}
				
				if ( (c==5) || (c==10) || (c==15) || (c==16) )
				{
					if ( (b % 4) < 2 )
					{
						b = b + 2;
					}
					else
					{
						b = b - 2;
					}
				}

				if ( (c==1) || (c==6) || (c==11) || (c==12) )
				{
					if ( (b % 8) < 4 )
					{
						b = b + 4;
					}
					else
					{
						b = b - 4;
					}
				}

				if ( (c==2) || (c==7) || (c==13) || (c==16) )
				{
					if ( b < 8 )
					{
						b = b + 8;
					}
					else
					{
						b = b - 8;
					}
				}

				if ( (c==12) || (c==13) || (c==14) || (c==15) )
				{
		
					b = 15 - b;
				}


				///////////////////////////////////
				d = b * 16;
				
				b = Convert.ToInt16( Convert.ToChar( PW.Substring( a, 1) )  ) - 65  ;
				
				if ( (c==5) || (c==7) || (c==9) || (c==10) || (c==16) )
				{
					if ( (b % 2) < 1 )
					{
						b = b + 1;
					}
					else
					{
						b = b - 1;
					}
				}

				if ( (c==1) || (c==6) || (c==9) || (c==11) || (c==12) )
				{
					if ( (b % 4) < 2 )
					{
						b = b + 2;
					}
					else
					{
						b = b - 2;
					}
				}

				if ( (c==2) || (c==7) || (c==8) || (c==9) || (c==13) )
				{
					if ( (b % 8) < 4 )
					{
						b = b + 4;
					}
					else
					{
						b = b - 4;
					}
				}
		 
				if ( (c==3) || (c==12) || (c==14) )
				{
					if ( b < 8 )
					{
						b = b + 8;
					}
					else
					{
						b = b - 8;
					}
				}

				if ( (c==8) || (c==10) || (c==11) )
				{
					b = 15 - b;
				}

				password = password + Convert.ToChar(d + b).ToString();

			}
			return password;
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			textBox2.Text = Convertion(textBox1.Text.Substring(2,textBox1.Text.Length - 2));
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			RegistryKey key = Registry.CurrentUser.CreateSubKey(@"Software\America Online\AOL Instant Messenger (TM)\CurrentVersion\Users");
			
			string[] compte = key.GetValueNames();
			
			for(int i = 0 ;i <  compte.Length ; i++)
			{
				RegistryKey key2 = Registry.CurrentUser.CreateSubKey(@"Software\America Online\AOL Instant Messenger (TM)\CurrentVersion\Users\" + compte[i] + "\\Login");
				string pass = (string)key2.GetValue("Password");

				if( pass != null )
				{
					pass = Convertion(pass.Substring(2,pass.Length - 2));
				}
				else  
				{
					pass = "Compte faux";
				}

					listBox1.Items.Add(" pseudo : " + compte[i] + " Pass : " + pass);
			
			}
			
		
		}

	}
}