init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Crmf/ProofOfPossession.cs

@@ -0,0 +1,79 @@
+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Crmf;
+
+public class ProofOfPossession : Asn1Encodable, IAsn1Choice
+{
+	public const int TYPE_RA_VERIFIED = 0;
+
+	public const int TYPE_SIGNING_KEY = 1;
+
+	public const int TYPE_KEY_ENCIPHERMENT = 2;
+
+	public const int TYPE_KEY_AGREEMENT = 3;
+
+	private readonly int tagNo;
+
+	private readonly Asn1Encodable obj;
+
+	public virtual int Type => tagNo;
+
+	public virtual Asn1Encodable Object => obj;
+
+	private ProofOfPossession(Asn1TaggedObject tagged)
+	{
+		tagNo = tagged.TagNo;
+		switch (tagNo)
+		{
+		case 0:
+			obj = DerNull.Instance;
+			break;
+		case 1:
+			obj = PopoSigningKey.GetInstance(tagged, isExplicit: false);
+			break;
+		case 2:
+		case 3:
+			obj = PopoPrivKey.GetInstance(tagged, isExplicit: false);
+			break;
+		default:
+			throw new ArgumentException("unknown tag: " + tagNo, "tagged");
+		}
+	}
+
+	public static ProofOfPossession GetInstance(object obj)
+	{
+		if (obj is ProofOfPossession)
+		{
+			return (ProofOfPossession)obj;
+		}
+		if (obj is Asn1TaggedObject)
+		{
+			return new ProofOfPossession((Asn1TaggedObject)obj);
+		}
+		throw new ArgumentException("Invalid object: " + Platform.GetTypeName(obj), "obj");
+	}
+
+	public ProofOfPossession()
+	{
+		tagNo = 0;
+		obj = DerNull.Instance;
+	}
+
+	public ProofOfPossession(PopoSigningKey Poposk)
+	{
+		tagNo = 1;
+		obj = Poposk;
+	}
+
+	public ProofOfPossession(int type, PopoPrivKey privkey)
+	{
+		tagNo = type;
+		obj = privkey;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		return new DerTaggedObject(explicitly: false, tagNo, obj);
+	}
+}