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using System;
using System.Collections;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* The extendedKeyUsage object.
* <pre>
* extendedKeyUsage ::= Sequence SIZE (1..MAX) OF KeyPurposeId
* </pre>
*/
public class ExtendedKeyUsage
: Asn1Encodable
{
internal readonly IDictionary usageTable = Platform.CreateHashtable();
internal readonly Asn1Sequence seq;
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: " + obj.GetType().Name);
}
private ExtendedKeyUsage(
Asn1Sequence seq)
{
this.seq = seq;
foreach (object o in seq)
{
if (!(o is DerObjectIdentifier))
throw new ArgumentException("Only DerObjectIdentifier instances allowed in ExtendedKeyUsage.");
this.usageTable[o] = o;
}
}
public ExtendedKeyUsage(
params KeyPurposeID[] usages)
{
this.seq = new DerSequence(usages);
foreach (KeyPurposeID usage in usages)
{
this.usageTable[usage] = usage;
}
}
#if !SILVERLIGHT
[Obsolete]
public ExtendedKeyUsage(
ArrayList usages)
: this((IEnumerable)usages)
{
}
#endif
public ExtendedKeyUsage(
IEnumerable usages)
{
Asn1EncodableVector v = new Asn1EncodableVector();
foreach (object usage in usages)
{
Asn1Encodable o = KeyPurposeID.GetInstance(usage);
v.Add(o);
this.usageTable[o] = o;
}
this.seq = new DerSequence(v);
}
public bool HasKeyPurposeId(
KeyPurposeID keyPurposeId)
{
return usageTable.Contains(keyPurposeId);
}
#if !SILVERLIGHT
[Obsolete("Use 'GetAllUsages'")]
public ArrayList GetUsages()
{
return new ArrayList(usageTable.Values);
}
#endif
/**
* Returns all extended key usages.
* The returned ArrayList contains DerObjectIdentifier instances.
* @return An ArrayList with all key purposes.
*/
public IList GetAllUsages()
{
return Platform.CreateArrayList(usageTable.Values);
}
public int Count
{
get { return usageTable.Count; }
}
public override Asn1Object ToAsn1Object()
{
return seq;
}
}
}
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