init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/DerBoolean.cs

@@ -0,0 +1,99 @@
+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1;
+
+public class DerBoolean : Asn1Object
+{
+	private readonly byte value;
+
+	public static readonly DerBoolean False = new DerBoolean(value: false);
+
+	public static readonly DerBoolean True = new DerBoolean(value: true);
+
+	public bool IsTrue => value != 0;
+
+	public static DerBoolean GetInstance(object obj)
+	{
+		if (obj == null || obj is DerBoolean)
+		{
+			return (DerBoolean)obj;
+		}
+		throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
+	}
+
+	public static DerBoolean GetInstance(bool value)
+	{
+		if (!value)
+		{
+			return False;
+		}
+		return True;
+	}
+
+	public static DerBoolean GetInstance(Asn1TaggedObject obj, bool isExplicit)
+	{
+		Asn1Object asn1Object = obj.GetObject();
+		if (isExplicit || asn1Object is DerBoolean)
+		{
+			return GetInstance(asn1Object);
+		}
+		return FromOctetString(((Asn1OctetString)asn1Object).GetOctets());
+	}
+
+	public DerBoolean(byte[] val)
+	{
+		if (val.Length != 1)
+		{
+			throw new ArgumentException("byte value should have 1 byte in it", "val");
+		}
+		value = val[0];
+	}
+
+	private DerBoolean(bool value)
+	{
+		this.value = (byte)(value ? byte.MaxValue : 0);
+	}
+
+	internal override void Encode(DerOutputStream derOut)
+	{
+		derOut.WriteEncoded(1, new byte[1] { value });
+	}
+
+	protected override bool Asn1Equals(Asn1Object asn1Object)
+	{
+		if (!(asn1Object is DerBoolean derBoolean))
+		{
+			return false;
+		}
+		return IsTrue == derBoolean.IsTrue;
+	}
+
+	protected override int Asn1GetHashCode()
+	{
+		return IsTrue.GetHashCode();
+	}
+
+	public override string ToString()
+	{
+		if (!IsTrue)
+		{
+			return "FALSE";
+		}
+		return "TRUE";
+	}
+
+	internal static DerBoolean FromOctetString(byte[] value)
+	{
+		if (value.Length != 1)
+		{
+			throw new ArgumentException("BOOLEAN value should have 1 byte in it", "value");
+		}
+		return value[0] switch
+		{
+			byte.MaxValue => True, 
+			0 => False, 
+			_ => new DerBoolean(value), 
+		};
+	}
+}