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);
	}
}