init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Smime/SmimeCapability.cs

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+using System;
+using Org.BouncyCastle.Asn1.Pkcs;
+
+namespace Org.BouncyCastle.Asn1.Smime;
+
+public class SmimeCapability : Asn1Encodable
+{
+	public static readonly DerObjectIdentifier PreferSignedData = PkcsObjectIdentifiers.PreferSignedData;
+
+	public static readonly DerObjectIdentifier CannotDecryptAny = PkcsObjectIdentifiers.CannotDecryptAny;
+
+	public static readonly DerObjectIdentifier SmimeCapabilitiesVersions = PkcsObjectIdentifiers.SmimeCapabilitiesVersions;
+
+	public static readonly DerObjectIdentifier DesCbc = new DerObjectIdentifier("1.3.14.3.2.7");
+
+	public static readonly DerObjectIdentifier DesEde3Cbc = PkcsObjectIdentifiers.DesEde3Cbc;
+
+	public static readonly DerObjectIdentifier RC2Cbc = PkcsObjectIdentifiers.RC2Cbc;
+
+	private DerObjectIdentifier capabilityID;
+
+	private Asn1Object parameters;
+
+	public DerObjectIdentifier CapabilityID => capabilityID;
+
+	public Asn1Object Parameters => parameters;
+
+	public SmimeCapability(Asn1Sequence seq)
+	{
+		capabilityID = (DerObjectIdentifier)seq[0].ToAsn1Object();
+		if (seq.Count > 1)
+		{
+			parameters = seq[1].ToAsn1Object();
+		}
+	}
+
+	public SmimeCapability(DerObjectIdentifier capabilityID, Asn1Encodable parameters)
+	{
+		if (capabilityID == null)
+		{
+			throw new ArgumentNullException("capabilityID");
+		}
+		this.capabilityID = capabilityID;
+		if (parameters != null)
+		{
+			this.parameters = parameters.ToAsn1Object();
+		}
+	}
+
+	public static SmimeCapability GetInstance(object obj)
+	{
+		if (obj == null || obj is SmimeCapability)
+		{
+			return (SmimeCapability)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new SmimeCapability((Asn1Sequence)obj);
+		}
+		throw new ArgumentException("Invalid SmimeCapability");
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(capabilityID);
+		if (parameters != null)
+		{
+			asn1EncodableVector.Add(parameters);
+		}
+		return new DerSequence(asn1EncodableVector);
+	}
+}