init commit

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

@@ -0,0 +1,56 @@
+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Cms;
+
+public class KeyAgreeRecipientIdentifier : Asn1Encodable, IAsn1Choice
+{
+	private readonly IssuerAndSerialNumber issuerSerial;
+
+	private readonly RecipientKeyIdentifier rKeyID;
+
+	public IssuerAndSerialNumber IssuerAndSerialNumber => issuerSerial;
+
+	public RecipientKeyIdentifier RKeyID => rKeyID;
+
+	public static KeyAgreeRecipientIdentifier GetInstance(Asn1TaggedObject obj, bool isExplicit)
+	{
+		return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
+	}
+
+	public static KeyAgreeRecipientIdentifier GetInstance(object obj)
+	{
+		if (obj == null || obj is KeyAgreeRecipientIdentifier)
+		{
+			return (KeyAgreeRecipientIdentifier)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.GetInstance(obj));
+		}
+		if (obj is Asn1TaggedObject && ((Asn1TaggedObject)obj).TagNo == 0)
+		{
+			return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.GetInstance((Asn1TaggedObject)obj, explicitly: false));
+		}
+		throw new ArgumentException("Invalid KeyAgreeRecipientIdentifier: " + Platform.GetTypeName(obj), "obj");
+	}
+
+	public KeyAgreeRecipientIdentifier(IssuerAndSerialNumber issuerSerial)
+	{
+		this.issuerSerial = issuerSerial;
+	}
+
+	public KeyAgreeRecipientIdentifier(RecipientKeyIdentifier rKeyID)
+	{
+		this.rKeyID = rKeyID;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		if (issuerSerial != null)
+		{
+			return issuerSerial.ToAsn1Object();
+		}
+		return new DerTaggedObject(explicitly: false, 0, rKeyID);
+	}
+}