1 files changed, 116 insertions, 0 deletions
diff --git a/crypto/src/asn1/LazyDLSet.cs b/crypto/src/asn1/LazyDLSet.cs
new file mode 100644
index 000000000..f644f69e5
--- /dev/null
+++ b/crypto/src/asn1/LazyDLSet.cs
@@ -0,0 +1,116 @@
+using System;
+using System.Collections;
+using System.IO;
+
+namespace Org.BouncyCastle.Asn1
+{
+ internal class LazyDLSet
+ : DerSet
+ {
+ private byte[] encoded;
+
+ internal LazyDLSet(byte[] encoded)
+ : base()
+ {
+ if (null == encoded)
+ throw new ArgumentNullException("encoded");
+
+ this.encoded = encoded;
+ }
+
+ public override Asn1Encodable this[int index]
+ {
+ get
+ {
+ Force();
+
+ return base[index];
+ }
+ }
+
+ public override IEnumerator GetEnumerator()
+ {
+ byte[] encoded = GetContents();
+ if (null != encoded)
+ {
+ return new LazyDLEnumerator(encoded);
+ }
+
+ return base.GetEnumerator();
+ }
+
+ public override int Count
+ {
+ get
+ {
+ Force();
+
+ return base.Count;
+ }
+ }
+
+ public override Asn1Encodable[] ToArray()
+ {
+ Force();
+
+ return base.ToArray();
+ }
+
+ public override string ToString()
+ {
+ Force();
+
+ return base.ToString();
+ }
+
+ internal override int EncodedLength(bool withID)
+ {
+ byte[] encoded = GetContents();
+ if (encoded != null)
+ {
+ return Asn1OutputStream.GetLengthOfEncodingDL(withID, encoded.Length);
+ }
+
+ return base.EncodedLength(withID);
+ }
+
+ internal override void Encode(Asn1OutputStream asn1Out, bool withID)
+ {
+ byte[] encoded = GetContents();
+ if (encoded != null)
+ {
+ asn1Out.WriteEncodingDL(withID, Asn1Tags.Constructed | Asn1Tags.Set, encoded);
+ return;
+ }
+
+ base.Encode(asn1Out, withID);
+ }
+
+ private void Force()
+ {
+ lock (this)
+ {
+ if (null != encoded)
+ {
+ Asn1InputStream input = new LazyAsn1InputStream(encoded);
+ try
+ {
+ Asn1EncodableVector v = input.ReadVector();
+
+ this.elements = v.TakeElements();
+ this.encoded = null;
+ }
+ catch (IOException e)
+ {
+ throw new Asn1ParsingException("malformed ASN.1: " + e.Message, e);
+ }
+ }
+ }
+ }
+
+ private byte[] GetContents()
+ {
+ lock (this) return encoded;
+ }
+ }
+}
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