cryptographer.cs

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using System;

using System.Threading;
namespace CO_Full_Server
{
	/// <summary>
	/// Summary description for Cryptographer.
	/// </summary>
	public class Cryptographer : object
	{
        ushort m_InCounter = 0;
		ushort m_OutCounter = 0;
		bool m_UseAlt = false;
		private byte[] m_Key1 = {
								  0x9D, 0x90, 0x83, 0x8A, 0xD1, 0x8C, 0xE7, 0xF6, 0x25, 0x28, 0xEB, 0x82, 0x99, 0x64, 0x8F, 0x2E,
								  0x2D, 0x40, 0xD3, 0xFA, 0xE1, 0xBC, 0xB7, 0xE6, 0xB5, 0xD8, 0x3B, 0xF2, 0xA9, 0x94, 0x5F, 0x1E, 
								  0xBD, 0xF0, 0x23, 0x6A, 0xF1, 0xEC, 0x87, 0xD6, 0x45, 0x88, 0x8B, 0x62, 0xB9, 0xC4, 0x2F, 0x0E, 
								  0x4D, 0xA0, 0x73, 0xDA, 0x01, 0x1C, 0x57, 0xC6, 0xD5, 0x38, 0xDB, 0xD2, 0xC9, 0xF4, 0xFF, 0xFE, 
								  0xDD, 0x50, 0xC3, 0x4A, 0x11, 0x4C, 0x27, 0xB6, 0x65, 0xE8, 0x2B, 0x42, 0xD9, 0x24, 0xCF, 0xEE, 
								  0x6D, 0x00, 0x13, 0xBA, 0x21, 0x7C, 0xF7, 0xA6, 0xF5, 0x98, 0x7B, 0xB2, 0xE9, 0x54, 0x9F, 0xDE, 
								  0xFD, 0xB0, 0x63, 0x2A, 0x31, 0xAC, 0xC7, 0x96, 0x85, 0x48, 0xCB, 0x22, 0xF9, 0x84, 0x6F, 0xCE, 
								  0x8D, 0x60, 0xB3, 0x9A, 0x41, 0xDC, 0x97, 0x86, 0x15, 0xF8, 0x1B, 0x92, 0x09, 0xB4, 0x3F, 0xBE, 
								  0x1D, 0x10, 0x03, 0x0A, 0x51, 0x0C, 0x67, 0x76, 0xA5, 0xA8, 0x6B, 0x02, 0x19, 0xE4, 0x0F, 0xAE, 
								  0xAD, 0xC0, 0x53, 0x7A, 0x61, 0x3C, 0x37, 0x66, 0x35, 0x58, 0xBB, 0x72, 0x29, 0x14, 0xDF, 0x9E, 
								  0x3D, 0x70, 0xA3, 0xEA, 0x71, 0x6C, 0x07, 0x56, 0xC5, 0x08, 0x0B, 0xE2, 0x39, 0x44, 0xAF, 0x8E, 
								  0xCD, 0x20, 0xF3, 0x5A, 0x81, 0x9C, 0xD7, 0x46, 0x55, 0xB8, 0x5B, 0x52, 0x49, 0x74, 0x7F, 0x7E, 
								  0x5D, 0xD0, 0x43, 0xCA, 0x91, 0xCC, 0xA7, 0x36, 0xE5, 0x68, 0xAB, 0xC2, 0x59, 0xA4, 0x4F, 0x6E, 
								  0xED, 0x80, 0x93, 0x3A, 0xA1, 0xFC, 0x77, 0x26, 0x75, 0x18, 0xFB, 0x32, 0x69, 0xD4, 0x1F, 0x5E, 
								  0x7D, 0x30, 0xE3, 0xAA, 0xB1, 0x2C, 0x47, 0x16, 0x05, 0xC8, 0x4B, 0xA2, 0x79, 0x04, 0xEF, 0x4E, 
								  0x0D, 0xE0, 0x33, 0x1A, 0xC1, 0x5C, 0x17, 0x06, 0x95, 0x78, 0x9B, 0x12, 0x89, 0x34, 0xBF, 0x3E};

		private byte[] m_Key2 = {
								  0x62, 0x4F, 0xE8, 0x15, 0xDE, 0xEB, 0x04, 0x91, 0x1A, 0xC7, 0xE0, 0x4D, 0x16, 0xE3, 0x7C, 0x49,
								  0xD2, 0x3F, 0xD8, 0x85, 0x4E, 0xDB, 0xF4, 0x01, 0x8A, 0xB7, 0xD0, 0xBD, 0x86, 0xD3, 0x6C, 0xB9,
								  0x42, 0x2F, 0xC8, 0xF5, 0xBE, 0xCB, 0xE4, 0x71, 0xFA, 0xA7, 0xC0, 0x2D, 0xF6, 0xC3, 0x5C, 0x29,
								  0xB2, 0x1F, 0xB8, 0x65, 0x2E, 0xBB, 0xD4, 0xE1, 0x6A, 0x97, 0xB0, 0x9D, 0x66, 0xB3, 0x4C, 0x99,
								  0x22, 0x0F, 0xA8, 0xD5, 0x9E, 0xAB, 0xC4, 0x51, 0xDA, 0x87, 0xA0, 0x0D, 0xD6, 0xA3, 0x3C, 0x09,
								  0x92, 0xFF, 0x98, 0x45, 0x0E, 0x9B, 0xB4, 0xC1, 0x4A, 0x77, 0x90, 0x7D, 0x46, 0x93, 0x2C, 0x79,
								  0x02, 0xEF, 0x88, 0xB5, 0x7E, 0x8B, 0xA4, 0x31, 0xBA, 0x67, 0x80, 0xED, 0xB6, 0x83, 0x1C, 0xE9,
								  0x72, 0xDF, 0x78, 0x25, 0xEE, 0x7B, 0x94, 0xA1, 0x2A, 0x57, 0x70, 0x5D, 0x26, 0x73, 0x0C, 0x59,
								  0xE2, 0xCF, 0x68, 0x95, 0x5E, 0x6B, 0x84, 0x11, 0x9A, 0x47, 0x60, 0xCD, 0x96, 0x63, 0xFC, 0xC9,
								  0x52, 0xBF, 0x58, 0x05, 0xCE, 0x5B, 0x74, 0x81, 0x0A, 0x37, 0x50, 0x3D, 0x06, 0x53, 0xEC, 0x39,
								  0xC2, 0xAF, 0x48, 0x75, 0x3E, 0x4B, 0x64, 0xF1, 0x7A, 0x27, 0x40, 0xAD, 0x76, 0x43, 0xDC, 0xA9,
								  0x32, 0x9F, 0x38, 0xE5, 0xAE, 0x3B, 0x54, 0x61, 0xEA, 0x17, 0x30, 0x1D, 0xE6, 0x33, 0xCC, 0x19,
								  0xA2, 0x8F, 0x28, 0x55, 0x1E, 0x2B, 0x44, 0xD1, 0x5A, 0x07, 0x20, 0x8D, 0x56, 0x23, 0xBC, 0x89,
								  0x12, 0x7F, 0x18, 0xC5, 0x8E, 0x1B, 0x34, 0x41, 0xCA, 0xF7, 0x10, 0xFD, 0xC6, 0x13, 0xAC, 0xF9,
								  0x82, 0x6F, 0x08, 0x35, 0xFE, 0x0B, 0x24, 0xB1, 0x3A, 0xE7, 0x00, 0x6D, 0x36, 0x03, 0x9C, 0x69,
								  0xF2, 0x5F, 0xF8, 0xA5, 0x6E, 0xFB, 0x14, 0x21, 0xAA, 0xD7, 0xF0, 0xDD, 0xA6, 0xF3, 0x8C, 0xD9};
		private byte[] m_Key3;
		private byte[] m_Key4;
		
		public Cryptographer()
		{
		}
		public void SetKeys(byte[] InKey1, byte[] InKey2)
		{
			byte[] addKey1 = new byte[4];
			byte[] addKey2 = new byte[4];
			byte[] addResult = new byte[4];
			//addKey1.i = 0;
			//addKey2.i = 0;
			byte [] tempKey = new byte[4];

			long LMULer;
//			InKey1[0] = 0x20;
//			InKey1[1] = 0x5c;
//			InKey1[2] = 0x48;
//			InKey1[3] = 0xf4;
//			InKey2[0] = 0x00;
//			InKey2[1] = 0x44;
//			InKey2[2] = 0xa6;
//			InKey2[3] = 0x2e;

			//if (Key3) delete [] Key3;
			//if (Key4) delete [] Key4;
			Monitor.Enter(this);
			m_Key3 = new Byte[256];
			m_Key4 = new Byte[256];
			for (int x = 0; x < 4; x++)
			{
				addKey1[x] = InKey1[3 - x];
				addKey2[x] = InKey2[3 - x];
			}
			//cout << "Key1: " << addKey1.i << endl;
			//cout << "Key2: " << addKey2.i << endl;
			uint Adder1;
			uint Adder2;
			uint Adder3;
			Adder1 = (uint)((addKey1[3] << 24) | (addKey1[2] << 16) | (addKey1[1] << 8) | (addKey1[0]));
			Adder2 = (uint)((addKey2[3] << 24) | (addKey2[2] << 16) | (addKey2[1] << 8) | (addKey2[0]));
			Adder3 = Adder1 + Adder2;
			addResult[0] = (byte)(Adder3 & 0xff);
			addResult[1] = (byte)((Adder3 >> 8) & 0xff);
			addResult[2] = (byte)((Adder3 >> 16) & 0xff);
			addResult[3] = (byte)((Adder3 >> 24) & 0xff);
			for (int b = 3; b >= 0; b--)
			{
				//	printf("%.2x ", addResult.c[b]);
				tempKey[3-b] = addResult[b];
			}
			tempKey[2] = (byte)(tempKey[2] ^ (byte)0x43);
			tempKey[3] = (byte)(tempKey[3] ^ (byte)0x21);

			for (int b = 0; b < 4; b++)
			{
				tempKey[b] = (byte)(tempKey[b] ^ InKey1[b]);
			}
			
			//Build the 3rd Key
			for (int b = 0; b < 256; b++)
			{
				m_Key3[b] = (byte)(tempKey[3 - (b % 4)] ^ m_Key1[b]);
			}


			for (int x = 0; x < 4; x++)
			{
				addResult[x] = tempKey[3 - x];
			}
			Adder3 = (uint)((addResult[3] << 24) | (addResult[2] << 16) | (addResult[1] << 8) | (addResult[0]));
			LMULer = Adder3 * Adder3;
			LMULer = LMULer << 32;
			LMULer = LMULer >> 32;

			Adder3 = Convert.ToUInt32(LMULer & 0xffffffff);

			addResult[0] = (byte)(Adder3 & 0xff);
			addResult[1] = (byte)((Adder3 >> 8) & 0xff);
			addResult[2] = (byte)((Adder3 >> 16) & 0xff);
			addResult[3] = (byte)((Adder3 >> 24) & 0xff);

			for (int b = 3; b >= 0; b--)
			{
				tempKey[3-b] = addResult[b];
			}
			//Build the 4th Key
			for (int b = 0; b < 256; b++)
			{
				m_Key4[b] = Convert.ToByte(tempKey[3 - (b % 4)] ^ m_Key2[b]);
			}
			Monitor.Exit(this);

			//cout << "Int representation: " << charadd.i << endl;
		}

		public void ResetCounter()
		{
			Monitor.Enter(this);
			m_OutCounter = 0;
			m_InCounter = 0;
			Monitor.Exit(this);
		}

		public void EnableAlternateKeys()
		{
			Monitor.Enter(this);
			m_UseAlt = true;
			//m_InCounter = 0;
			m_OutCounter = 0;
			Monitor.Exit(this);
		}

		public void DisableAlternateKeys()
		{
			Monitor.Enter(this);
			m_UseAlt = false;
			m_InCounter = 0;
			m_OutCounter = 0;
			Monitor.Exit(this);
		}

		public void Encrypt(ref byte[] Data)
		{
			Monitor.Enter(this);
			for (int b = 0; b < Data.Length; b++)
			{
				Data[b] = (byte)(Data[b] ^ 0xab);
				Data[b] = (byte)(Data[b] << 4 | Data[b] >> 4);
				Data[b] = (byte)(m_Key2[m_OutCounter >> 8] ^ Data[b]);
				Data[b] = (byte)(m_Key1[m_OutCounter & 0x00ff] ^ Data[b]);
				m_OutCounter++;
			}        
			//Console.WriteLine("OutCounter = " + m_OutCounter);
			Monitor.Exit(this);
		}

		public void Decrypt(ref byte[] Data)
		{
			byte [] Key1;
			byte [] Key2;
			if (m_UseAlt)
			{
				Key1 = m_Key3;
				Key2 = m_Key4;
			}
			else
			{
				Key1 = m_Key1;
				Key2 = m_Key2;
			}
			Monitor.Enter(this);
			for (int b = 0; b < Data.Length; b++)
			{
				Data[b] = (byte)(Data[b] ^ 0xab);
				Data[b] = (byte)(Data[b] << 4 | Data[b] >> 4);
				Data[b] = (byte)(Key2[m_InCounter >> 8] ^ Data[b]);
				Data[b] = (byte)(Key1[(m_InCounter & 0x00ff)] ^ Data[b]);
				m_InCounter++;
			}
			Monitor.Exit(this);
		}
		public void PeekDecrypt(ref byte[] Data)
		{
			Monitor.Enter(this);
			for (int b = 0; b < Data.Length; b++)
			{
				Data[b] = (byte)(m_Key1[((m_InCounter + b) & 0x00ff)] ^ Data[b]);
				Data[b] = (byte)(m_Key2[(m_InCounter + b) >> 8] ^ Data[b]);
				Data[b] = (byte)(Data[b] << 4 | Data[b] >> 4);
				Data[b] = (byte)(Data[b] ^ 0xab);
			}
			Monitor.Exit(this);
		}

	}
}