init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Engines/DesEdeEngine.cs

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+using System;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Engines;
+
+public class DesEdeEngine : DesEngine
+{
+	private int[] workingKey1;
+
+	private int[] workingKey2;
+
+	private int[] workingKey3;
+
+	private bool forEncryption;
+
+	public override string AlgorithmName => "DESede";
+
+	public override void Init(bool forEncryption, ICipherParameters parameters)
+	{
+		if (!(parameters is KeyParameter))
+		{
+			throw new ArgumentException("invalid parameter passed to DESede init - " + Platform.GetTypeName(parameters));
+		}
+		byte[] key = ((KeyParameter)parameters).GetKey();
+		if (key.Length != 24 && key.Length != 16)
+		{
+			throw new ArgumentException("key size must be 16 or 24 bytes.");
+		}
+		this.forEncryption = forEncryption;
+		byte[] array = new byte[8];
+		Array.Copy(key, 0, array, 0, array.Length);
+		workingKey1 = DesEngine.GenerateWorkingKey(forEncryption, array);
+		byte[] array2 = new byte[8];
+		Array.Copy(key, 8, array2, 0, array2.Length);
+		workingKey2 = DesEngine.GenerateWorkingKey(!forEncryption, array2);
+		if (key.Length == 24)
+		{
+			byte[] array3 = new byte[8];
+			Array.Copy(key, 16, array3, 0, array3.Length);
+			workingKey3 = DesEngine.GenerateWorkingKey(forEncryption, array3);
+		}
+		else
+		{
+			workingKey3 = workingKey1;
+		}
+	}
+
+	public override int GetBlockSize()
+	{
+		return 8;
+	}
+
+	public override int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff)
+	{
+		if (workingKey1 == null)
+		{
+			throw new InvalidOperationException("DESede engine not initialised");
+		}
+		Check.DataLength(input, inOff, 8, "input buffer too short");
+		Check.OutputLength(output, outOff, 8, "output buffer too short");
+		byte[] array = new byte[8];
+		if (forEncryption)
+		{
+			DesEngine.DesFunc(workingKey1, input, inOff, array, 0);
+			DesEngine.DesFunc(workingKey2, array, 0, array, 0);
+			DesEngine.DesFunc(workingKey3, array, 0, output, outOff);
+		}
+		else
+		{
+			DesEngine.DesFunc(workingKey3, input, inOff, array, 0);
+			DesEngine.DesFunc(workingKey2, array, 0, array, 0);
+			DesEngine.DesFunc(workingKey1, array, 0, output, outOff);
+		}
+		return 8;
+	}
+
+	public override void Reset()
+	{
+	}
+}