init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/X509/ExtendedKeyUsage.cs

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+using System;
+using System.Collections;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.X509;
+
+public class ExtendedKeyUsage : Asn1Encodable
+{
+	internal readonly IDictionary usageTable = Platform.CreateHashtable();
+
+	internal readonly Asn1Sequence seq;
+
+	public int Count => usageTable.Count;
+
+	public static ExtendedKeyUsage GetInstance(Asn1TaggedObject obj, bool explicitly)
+	{
+		return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+	}
+
+	public static ExtendedKeyUsage GetInstance(object obj)
+	{
+		if (obj is ExtendedKeyUsage)
+		{
+			return (ExtendedKeyUsage)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new ExtendedKeyUsage((Asn1Sequence)obj);
+		}
+		if (obj is X509Extension)
+		{
+			return GetInstance(X509Extension.ConvertValueToObject((X509Extension)obj));
+		}
+		throw new ArgumentException("Invalid ExtendedKeyUsage: " + Platform.GetTypeName(obj));
+	}
+
+	private ExtendedKeyUsage(Asn1Sequence seq)
+	{
+		this.seq = seq;
+		foreach (object item in seq)
+		{
+			if (!(item is DerObjectIdentifier))
+			{
+				throw new ArgumentException("Only DerObjectIdentifier instances allowed in ExtendedKeyUsage.");
+			}
+			usageTable[item] = item;
+		}
+	}
+
+	public ExtendedKeyUsage(params KeyPurposeID[] usages)
+	{
+		seq = new DerSequence(usages);
+		foreach (KeyPurposeID keyPurposeID in usages)
+		{
+			usageTable[keyPurposeID] = keyPurposeID;
+		}
+	}
+
+	[Obsolete]
+	public ExtendedKeyUsage(ArrayList usages)
+		: this((IEnumerable)usages)
+	{
+	}
+
+	public ExtendedKeyUsage(IEnumerable usages)
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		foreach (object usage in usages)
+		{
+			Asn1Encodable instance = DerObjectIdentifier.GetInstance(usage);
+			asn1EncodableVector.Add(instance);
+			usageTable[instance] = instance;
+		}
+		seq = new DerSequence(asn1EncodableVector);
+	}
+
+	public bool HasKeyPurposeId(KeyPurposeID keyPurposeId)
+	{
+		return usageTable.Contains(keyPurposeId);
+	}
+
+	[Obsolete("Use 'GetAllUsages'")]
+	public ArrayList GetUsages()
+	{
+		return new ArrayList(usageTable.Values);
+	}
+
+	public IList GetAllUsages()
+	{
+		return Platform.CreateArrayList(usageTable.Values);
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		return seq;
+	}
+}