/*  MapleLib - A general-purpose MapleStory library
 *  
 * Copyright (C) 2009-2015 Snow and haha01haha01
 * Copyright (C) 2021-2024 Jen-Chieh Shen
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace MapleLib.MapleCryptoLib
{
	/// <summary>
	/// Contains all the constant values used for various functions
	/// </summary>
	public class CryptoConstants
	{

		/// <summary>
		/// AES UserKey used by MapleStory
		/// </summary>
		public static byte[] UserKey = new byte[128] { //16 * 8
            0x13, 0x00, 0x00, 0x00, 0x52, 0x00, 0x00, 0x00, 0x2A, 0x00, 0x00, 0x00, 0x5B, 0x00, 0x00, 0x00,
            0x08, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00,
            0x06, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x43, 0x00, 0x00, 0x00, 0x0F, 0x00, 0x00, 0x00,
            0xB4, 0x00, 0x00, 0x00, 0x4B, 0x00, 0x00, 0x00, 0x35, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00,
            0x1B, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x5F, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
            0x0F, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00, 0x0C, 0x00, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00,
            0x33, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
            0x52, 0x00, 0x00, 0x00, 0xDE, 0x00, 0x00, 0x00, 0xC7, 0x00, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00
            };

		/// <summary>
		/// ShuffleBytes used by MapleStory to generate a new IV
		/// </summary>
		public static byte[] bShuffle = new byte[256] {//16 * 16
            0xEC, 0x3F, 0x77, 0xA4, 0x45, 0xD0, 0x71, 0xBF, 0xB7, 0x98, 0x20, 0xFC, 0x4B, 0xE9, 0xB3, 0xE1,
            0x5C, 0x22, 0xF7, 0x0C, 0x44, 0x1B, 0x81, 0xBD, 0x63, 0x8D, 0xD4, 0xC3, 0xF2, 0x10, 0x19, 0xE0,
            0xFB, 0xA1, 0x6E, 0x66, 0xEA, 0xAE, 0xD6, 0xCE, 0x06, 0x18, 0x4E, 0xEB, 0x78, 0x95, 0xDB, 0xBA,
            0xB6, 0x42, 0x7A, 0x2A, 0x83, 0x0B, 0x54, 0x67, 0x6D, 0xE8, 0x65, 0xE7, 0x2F, 0x07, 0xF3, 0xAA,
            0x27, 0x7B, 0x85, 0xB0, 0x26, 0xFD, 0x8B, 0xA9, 0xFA, 0xBE, 0xA8, 0xD7, 0xCB, 0xCC, 0x92, 0xDA,
            0xF9, 0x93, 0x60, 0x2D, 0xDD, 0xD2, 0xA2, 0x9B, 0x39, 0x5F, 0x82, 0x21, 0x4C, 0x69, 0xF8, 0x31,
            0x87, 0xEE, 0x8E, 0xAD, 0x8C, 0x6A, 0xBC, 0xB5, 0x6B, 0x59, 0x13, 0xF1, 0x04, 0x00, 0xF6, 0x5A,
            0x35, 0x79, 0x48, 0x8F, 0x15, 0xCD, 0x97, 0x57, 0x12, 0x3E, 0x37, 0xFF, 0x9D, 0x4F, 0x51, 0xF5,
            0xA3, 0x70, 0xBB, 0x14, 0x75, 0xC2, 0xB8, 0x72, 0xC0, 0xED, 0x7D, 0x68, 0xC9, 0x2E, 0x0D, 0x62,
            0x46, 0x17, 0x11, 0x4D, 0x6C, 0xC4, 0x7E, 0x53, 0xC1, 0x25, 0xC7, 0x9A, 0x1C, 0x88, 0x58, 0x2C,
            0x89, 0xDC, 0x02, 0x64, 0x40, 0x01, 0x5D, 0x38, 0xA5, 0xE2, 0xAF, 0x55, 0xD5, 0xEF, 0x1A, 0x7C,
            0xA7, 0x5B, 0xA6, 0x6F, 0x86, 0x9F, 0x73, 0xE6, 0x0A, 0xDE, 0x2B, 0x99, 0x4A, 0x47, 0x9C, 0xDF,
            0x09, 0x76, 0x9E, 0x30, 0x0E, 0xE4, 0xB2, 0x94, 0xA0, 0x3B, 0x34, 0x1D, 0x28, 0x0F, 0x36, 0xE3,
            0x23, 0xB4, 0x03, 0xD8, 0x90, 0xC8, 0x3C, 0xFE, 0x5E, 0x32, 0x24, 0x50, 0x1F, 0x3A, 0x43, 0x8A,
            0x96, 0x41, 0x74, 0xAC, 0x52, 0x33, 0xF0, 0xD9, 0x29, 0x80, 0xB1, 0x16, 0xD3, 0xAB, 0x91, 0xB9,
            0x84, 0x7F, 0x61, 0x1E, 0xCF, 0xC5, 0xD1, 0x56, 0x3D, 0xCA, 0xF4, 0x05, 0xC6, 0xE5, 0x08, 0x49
        };

		/// <summary>
		/// Default AES Key used to generate a new IV
		/// </summary>
		public static byte[] bDefaultAESKeyValue = new byte[16] {
            0xC6, 0x50, 0x53, 0xF2, 0xA8, 0x42, 0x9D, 0x7F, 0x77, 0x09, 0x1D, 0x26, 0x42, 0x53, 0x88, 0x7C,
        };

		/// <summary>
		/// IV used to create the WzKey for GMS
		/// </summary>
		public static byte[] WZ_GMSIV = new byte[4] { 0x4D, 0x23, 0xC7, 0x2B };

		/// <summary>
		/// IV used to create the WzKey for MSEA
		/// </summary>
		public static byte[] WZ_MSEAIV = new byte[4] { 0xB9, 0x7D, 0x63, 0xE9 };

		/// <summary>
		/// Constant used in WZ offset encryption
		/// </summary>
		public static uint WZ_OffsetConstant = 0x581C3F6D;

		/// <summary>
		/// Trims the AES UserKey for use an AES cryptor
		/// </summary>
		public static byte[] getTrimmedUserKey()
		{
			byte[] key = new byte[32];
			for (int i = 0; i < 128; i += 16)
			{
				key[i / 4] = UserKey[i];
			}
			return key;
		}
	}
}