init commit

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

@@ -0,0 +1,93 @@
+using System;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1;
+
+public class DerEnumerated : Asn1Object
+{
+	private readonly byte[] bytes;
+
+	private static readonly DerEnumerated[] cache = new DerEnumerated[12];
+
+	public BigInteger Value => new BigInteger(bytes);
+
+	public static DerEnumerated GetInstance(object obj)
+	{
+		if (obj == null || obj is DerEnumerated)
+		{
+			return (DerEnumerated)obj;
+		}
+		throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
+	}
+
+	public static DerEnumerated GetInstance(Asn1TaggedObject obj, bool isExplicit)
+	{
+		Asn1Object asn1Object = obj.GetObject();
+		if (isExplicit || asn1Object is DerEnumerated)
+		{
+			return GetInstance(asn1Object);
+		}
+		return FromOctetString(((Asn1OctetString)asn1Object).GetOctets());
+	}
+
+	public DerEnumerated(int val)
+	{
+		bytes = BigInteger.ValueOf(val).ToByteArray();
+	}
+
+	public DerEnumerated(BigInteger val)
+	{
+		bytes = val.ToByteArray();
+	}
+
+	public DerEnumerated(byte[] bytes)
+	{
+		if (bytes.Length > 1 && ((bytes[0] == 0 && (bytes[1] & 0x80) == 0) || (bytes[0] == byte.MaxValue && (bytes[1] & 0x80) != 0)) && !DerInteger.AllowUnsafe())
+		{
+			throw new ArgumentException("malformed enumerated");
+		}
+		this.bytes = Arrays.Clone(bytes);
+	}
+
+	internal override void Encode(DerOutputStream derOut)
+	{
+		derOut.WriteEncoded(10, bytes);
+	}
+
+	protected override bool Asn1Equals(Asn1Object asn1Object)
+	{
+		if (!(asn1Object is DerEnumerated derEnumerated))
+		{
+			return false;
+		}
+		return Arrays.AreEqual(bytes, derEnumerated.bytes);
+	}
+
+	protected override int Asn1GetHashCode()
+	{
+		return Arrays.GetHashCode(bytes);
+	}
+
+	internal static DerEnumerated FromOctetString(byte[] enc)
+	{
+		if (enc.Length == 0)
+		{
+			throw new ArgumentException("ENUMERATED has zero length", "enc");
+		}
+		if (enc.Length == 1)
+		{
+			int num = enc[0];
+			if (num < cache.Length)
+			{
+				DerEnumerated derEnumerated = cache[num];
+				if (derEnumerated != null)
+				{
+					return derEnumerated;
+				}
+				return cache[num] = new DerEnumerated(Arrays.Clone(enc));
+			}
+		}
+		return new DerEnumerated(Arrays.Clone(enc));
+	}
+}