1 files changed, 119 insertions, 0 deletions
diff --git a/Crypto/src/asn1/cms/KEKIdentifier.cs b/Crypto/src/asn1/cms/KEKIdentifier.cs
new file mode 100644
index 000000000..e5d1d9090
--- /dev/null
+++ b/Crypto/src/asn1/cms/KEKIdentifier.cs
@@ -0,0 +1,119 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+
+namespace Org.BouncyCastle.Asn1.Cms
+{
+ public class KekIdentifier
+ : Asn1Encodable
+ {
+ private Asn1OctetString keyIdentifier;
+ private DerGeneralizedTime date;
+ private OtherKeyAttribute other;
+
+ public KekIdentifier(
+ byte[] keyIdentifier,
+ DerGeneralizedTime date,
+ OtherKeyAttribute other)
+ {
+ this.keyIdentifier = new DerOctetString(keyIdentifier);
+ this.date = date;
+ this.other = other;
+ }
+
+ public KekIdentifier(
+ Asn1Sequence seq)
+ {
+ keyIdentifier = (Asn1OctetString) seq[0];
+
+ switch (seq.Count)
+ {
+ case 1:
+ break;
+ case 2:
+ if (seq[1] is DerGeneralizedTime)
+ {
+ date = (DerGeneralizedTime) seq[1];
+ }
+ else
+ {
+ other = OtherKeyAttribute.GetInstance(seq[2]);
+ }
+ break;
+ case 3:
+ date = (DerGeneralizedTime) seq[1];
+ other = OtherKeyAttribute.GetInstance(seq[2]);
+ break;
+ default:
+ throw new ArgumentException("Invalid KekIdentifier");
+ }
+ }
+
+ /**
+ * return a KekIdentifier object from a tagged object.
+ *
+ * @param obj the tagged object holding the object we want.
+ * @param explicitly true if the object is meant to be explicitly
+ * tagged false otherwise.
+ * @exception ArgumentException if the object held by the
+ * tagged object cannot be converted.
+ */
+ public static KekIdentifier GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ /**
+ * return a KekIdentifier object from the given object.
+ *
+ * @param obj the object we want converted.
+ * @exception ArgumentException if the object cannot be converted.
+ */
+ public static KekIdentifier GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is KekIdentifier)
+ return (KekIdentifier)obj;
+
+ if (obj is Asn1Sequence)
+ return new KekIdentifier((Asn1Sequence)obj);
+
+ throw new ArgumentException("Invalid KekIdentifier: " + obj.GetType().Name);
+ }
+
+ public Asn1OctetString KeyIdentifier
+ {
+ get { return keyIdentifier; }
+ }
+
+ public DerGeneralizedTime Date
+ {
+ get { return date; }
+ }
+
+ public OtherKeyAttribute Other
+ {
+ get { return other; }
+ }
+
+ /**
+ * Produce an object suitable for an Asn1OutputStream.
+ * <pre>
+ * KekIdentifier ::= Sequence {
+ * keyIdentifier OCTET STRING,
+ * date GeneralizedTime OPTIONAL,
+ * other OtherKeyAttribute OPTIONAL
+ * }
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector(keyIdentifier);
+ v.AddOptional(date, other);
+ return new DerSequence(v);
+ }
+ }
+}
+
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