using System;

namespace Filter.Networking.Instances
{
	internal class FiestaCrypto
	{
		public short Xor;

		private readonly byte[] XorTable = new byte[] { 7, 89, 105, 74, 148, 17, 148, 133, 140, 136, 5, 203, 160, 158, 205, 88, 58, 54, 91, 26, 106, 22, 254, 189, 223, 148, 2, 248, 33, 150, 200, 233, 158, 247, 191, 189, 207, 205, 178, 122, 0, 159, 64, 34, 252, 17, 249, 12, 46, 18, 251, 167, 116, 10, 125, 120, 64, 30, 44, 160, 45, 6, 203, 168, 185, 126, 239, 222, 73, 234, 78, 19, 22, 22, 128, 244, 61, 194, 154, 212, 134, 215, 148, 36, 23, 244, 214, 101, 189, 63, 219, 228, 225, 15, 80, 246, 236, 122, 154, 12, 39, 61, 36, 102, 211, 34, 104, 156, 154, 82, 11, 224, 249, 165, 11, 37, 218, 128, 73, 13, 253, 62, 119, 209, 86, 168, 183, 244, 15, 155, 232, 15, 82, 71, 245, 111, 131, 32, 34, 219, 15, 11, 177, 67, 133, 193, 203, 164, 11, 2, 25, 223, 240, 139, 236, 219, 108, 109, 102, 173, 69, 190, 137, 20, 126, 47, 137, 16, 184, 147, 96, 216, 96, 222, 246, 254, 110, 155, 202, 6, 193, 117, 149, 51, 207, 192, 178, 224, 204, 165, 206, 18, 246, 229, 181, 180, 38, 197, 178, 24, 79, 42, 93, 38, 27, 101, 77, 245, 69, 201, 132, 20, 220, 124, 18, 75, 24, 156, 199, 36, 231, 60, 100, 255, 214, 58, 44, 238, 140, 129, 73, 57, 108, 183, 220, 189, 148, 226, 50, 247, 221, 10, 252, 2, 1, 100, 236, 76, 148, 10, 177, 86, 245, 201, 169, 52, 222, 15, 56, 39, 188, 129, 48, 15, 123, 56, 37, 254, 232, 62, 41, 186, 85, 67, 191, 107, 159, 31, 138, 73, 82, 24, 127, 138, 248, 136, 36, 92, 79, 225, 168, 48, 135, 142, 80, 31, 47, 209, 12, 180, 253, 10, 188, 220, 18, 133, 226, 82, 238, 74, 88, 56, 171, 255, 198, 61, 185, 96, 100, 10, 180, 80, 213, 64, 137, 23, 154, 213, 133, 207, 236, 13, 126, 129, 127, 227, 195, 4, 1, 34, 236, 39, 204, 250, 62, 33, 166, 84, 200, 222, 0, 182, 223, 39, 159, 246, 37, 52, 7, 133, 191, 167, 165, 165, 224, 131, 12, 61, 93, 32, 64, 175, 96, 163, 100, 86, 243, 5, 196, 28, 125, 55, 152, 195, 232, 90, 110, 88, 133, 164, 154, 107, 106, 244, 163, 123, 97, 155, 9, 64, 30, 96, 75, 50, 217, 81, 164, 254, 249, 93, 78, 74, 251, 74, 212, 124, 51, 2, 51, 213, 157, 206, 91, 170, 90, 124, 216, 248, 5, 250, 31, 43, 140, 114, 87, 80, 174, 108, 25, 137, 202, 1, 252, 252, 41, 155, 97, 18, 104, 99, 101, 70, 38, 196, 91, 80, 170, 43, 190, 239, 154, 121, 2, 35, 117, 44, 32, 19, 253, 217, 90, 118, 35, 241, 11, 181, 184, 89, 249, 159, 122, 230, 6, 233, 165, 58, 180, 80, 191, 22, 88, 152, 179, 154, 110, 54, 238, 141, 235 };

		public FiestaCrypto(short TransferXor)
		{
			this.Xor = TransferXor;
		}

		public void Crypt(byte[] Buffer, int Start, int Length)
		{
			for (int i = 0; i < Length; i++)
			{
				Buffer[Start + i] = (byte)(Buffer[Start + i] ^ this.XorTable[this.Xor]);
				FiestaCrypto xor = this;
				xor.Xor = (short)(xor.Xor + 1);
				if (this.Xor == 499)
				{
					this.Xor = 0;
				}
			}
		}

		public void Crypt1(byte[] Buffer, int Start, int Length)
		{
			for (int i = 0; i < Length; i++)
			{
				Buffer[Start + i] = (byte)(Buffer[Start + i] ^ this.XorTable[this.Xor]);
				FiestaCrypto xor = this;
				xor.Xor = (short)(xor.Xor - 1);
				if (this.Xor == 499)
				{
					this.Xor = 0;
				}
			}
		}
	}
}