1 files changed, 131 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/ExtendedKeyUsage.cs b/Crypto/src/asn1/x509/ExtendedKeyUsage.cs
new file mode 100644
index 000000000..3bf79f392
--- /dev/null
+++ b/Crypto/src/asn1/x509/ExtendedKeyUsage.cs
@@ -0,0 +1,131 @@
+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.Add(o, o);
+ }
+ }
+
+ public ExtendedKeyUsage(
+ params KeyPurposeID[] usages)
+ {
+ this.seq = new DerSequence(usages);
+
+ foreach (KeyPurposeID usage in usages)
+ {
+ this.usageTable.Add(usage, usage);
+ }
+ }
+
+#if !(SILVERLIGHT || PORTABLE)
+ [Obsolete]
+ public ExtendedKeyUsage(
+ ArrayList usages)
+ : this((IEnumerable)usages)
+ {
+ }
+#endif
+
+ public ExtendedKeyUsage(
+ IEnumerable usages)
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector();
+
+ foreach (Asn1Object o in usages)
+ {
+ v.Add(o);
+
+ this.usageTable.Add(o, o);
+ }
+
+ this.seq = new DerSequence(v);
+ }
+
+ public bool HasKeyPurposeId(
+ KeyPurposeID keyPurposeId)
+ {
+ return usageTable[keyPurposeId] != null;
+ }
+
+#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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