1 files changed, 108 insertions, 0 deletions
diff --git a/Crypto/src/asn1/DerSet.cs b/Crypto/src/asn1/DerSet.cs
new file mode 100644
index 000000000..6d3f438bd
--- /dev/null
+++ b/Crypto/src/asn1/DerSet.cs
@@ -0,0 +1,108 @@
+using System.IO;
+
+namespace Org.BouncyCastle.Asn1
+{
+ /**
+ * A Der encoded set object
+ */
+ public class DerSet
+ : Asn1Set
+ {
+ public static readonly DerSet Empty = new DerSet();
+
+ public static DerSet FromVector(
+ Asn1EncodableVector v)
+ {
+ return v.Count < 1 ? Empty : new DerSet(v);
+ }
+
+ internal static DerSet FromVector(
+ Asn1EncodableVector v,
+ bool needsSorting)
+ {
+ return v.Count < 1 ? Empty : new DerSet(v, needsSorting);
+ }
+
+ /**
+ * create an empty set
+ */
+ public DerSet()
+ : base(0)
+ {
+ }
+
+ /**
+ * @param obj - a single object that makes up the set.
+ */
+ public DerSet(
+ Asn1Encodable obj)
+ : base(1)
+ {
+ AddObject(obj);
+ }
+
+ public DerSet(
+ params Asn1Encodable[] v)
+ : base(v.Length)
+ {
+ foreach (Asn1Encodable o in v)
+ {
+ AddObject(o);
+ }
+
+ Sort();
+ }
+
+ /**
+ * @param v - a vector of objects making up the set.
+ */
+ public DerSet(
+ Asn1EncodableVector v)
+ : this(v, true)
+ {
+ }
+
+ internal DerSet(
+ Asn1EncodableVector v,
+ bool needsSorting)
+ : base(v.Count)
+ {
+ foreach (Asn1Encodable o in v)
+ {
+ AddObject(o);
+ }
+
+ if (needsSorting)
+ {
+ Sort();
+ }
+ }
+
+ /*
+ * A note on the implementation:
+ * <p>
+ * As Der requires the constructed, definite-length model to
+ * be used for structured types, this varies slightly from the
+ * ASN.1 descriptions given. Rather than just outputing Set,
+ * we also have to specify Constructed, and the objects length.
+ */
+ internal override void Encode(
+ DerOutputStream derOut)
+ {
+ // TODO Intermediate buffer could be avoided if we could calculate expected length
+ MemoryStream bOut = new MemoryStream();
+ DerOutputStream dOut = new DerOutputStream(bOut);
+
+ foreach (Asn1Encodable obj in this)
+ {
+ dOut.WriteObject(obj);
+ }
+
+ dOut.Dispose();
+
+ byte[] bytes = bOut.ToArray();
+
+ derOut.WriteEncoded(Asn1Tags.Set | Asn1Tags.Constructed, bytes);
+ }
+ }
+}
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