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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
{
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 X509Extension)
return GetInstance(X509Extension.ConvertValueToObject((X509Extension)obj));
if (obj == null)
return null;
return new ExtendedKeyUsage(Asn1Sequence.GetInstance(obj));
}
public static ExtendedKeyUsage FromExtensions(X509Extensions extensions)
{
return GetInstance(X509Extensions.GetExtensionParsedValue(extensions, X509Extensions.ExtendedKeyUsage));
}
internal readonly IDictionary usageTable = Platform.CreateHashtable();
internal readonly Asn1Sequence seq;
private ExtendedKeyUsage(
Asn1Sequence seq)
{
this.seq = seq;
foreach (Asn1Encodable element in seq)
{
DerObjectIdentifier oid = DerObjectIdentifier.GetInstance(element);
this.usageTable[oid] = oid;
}
}
public ExtendedKeyUsage(
params KeyPurposeID[] usages)
{
this.seq = new DerSequence(usages);
foreach (KeyPurposeID usage in usages)
{
this.usageTable[usage] = usage;
}
}
#if !(SILVERLIGHT || PORTABLE)
[Obsolete]
public ExtendedKeyUsage(
ArrayList usages)
: this((IEnumerable)usages)
{
}
#endif
public ExtendedKeyUsage(
IEnumerable usages)
{
Asn1EncodableVector v = new Asn1EncodableVector();
foreach (object usage in usages)
{
DerObjectIdentifier oid = DerObjectIdentifier.GetInstance(usage);
v.Add(oid);
this.usageTable[oid] = oid;
}
this.seq = new DerSequence(v);
}
public bool HasKeyPurposeId(
KeyPurposeID keyPurposeId)
{
return usageTable.Contains(keyPurposeId);
}
#if !(SILVERLIGHT || PORTABLE)
[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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