init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Cms/KekIdentifier.cs

@@ -0,0 +1,77 @@
+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Cms;
+
+public class KekIdentifier : Asn1Encodable
+{
+	private Asn1OctetString keyIdentifier;
+
+	private DerGeneralizedTime date;
+
+	private OtherKeyAttribute other;
+
+	public Asn1OctetString KeyIdentifier => keyIdentifier;
+
+	public DerGeneralizedTime Date => date;
+
+	public OtherKeyAttribute Other => other;
+
+	public KekIdentifier(byte[] keyIdentifier, DerGeneralizedTime date, OtherKeyAttribute other)
+	{
+		this.keyIdentifier = new DerOctetString(keyIdentifier);
+		this.date = date;
+		this.other = other;
+	}
+
+	public KekIdentifier(Asn1Sequence seq)
+	{
+		keyIdentifier = (Asn1OctetString)seq[0];
+		switch (seq.Count)
+		{
+		case 2:
+			if (seq[1] is DerGeneralizedTime)
+			{
+				date = (DerGeneralizedTime)seq[1];
+			}
+			else
+			{
+				other = OtherKeyAttribute.GetInstance(seq[2]);
+			}
+			break;
+		case 3:
+			date = (DerGeneralizedTime)seq[1];
+			other = OtherKeyAttribute.GetInstance(seq[2]);
+			break;
+		default:
+			throw new ArgumentException("Invalid KekIdentifier");
+		case 1:
+			break;
+		}
+	}
+
+	public static KekIdentifier GetInstance(Asn1TaggedObject obj, bool explicitly)
+	{
+		return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+	}
+
+	public static KekIdentifier GetInstance(object obj)
+	{
+		if (obj == null || obj is KekIdentifier)
+		{
+			return (KekIdentifier)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new KekIdentifier((Asn1Sequence)obj);
+		}
+		throw new ArgumentException("Invalid KekIdentifier: " + Platform.GetTypeName(obj));
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(keyIdentifier);
+		asn1EncodableVector.AddOptional(date, other);
+		return new DerSequence(asn1EncodableVector);
+	}
+}