1 files changed, 41 insertions, 0 deletions
diff --git a/Crypto/src/asn1/DerNull.cs b/Crypto/src/asn1/DerNull.cs
new file mode 100644
index 000000000..a802f6486
--- /dev/null
+++ b/Crypto/src/asn1/DerNull.cs
@@ -0,0 +1,41 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1
+{
+ /**
+ * A Null object.
+ */
+ public class DerNull
+ : Asn1Null
+ {
+ public static readonly DerNull Instance = new DerNull(0);
+
+ byte[] zeroBytes = new byte[0];
+
+ [Obsolete("Use static Instance object")]
+ public DerNull()
+ {
+ }
+
+ protected internal DerNull(int dummy)
+ {
+ }
+
+ internal override void Encode(
+ DerOutputStream derOut)
+ {
+ derOut.WriteEncoded(Asn1Tags.Null, zeroBytes);
+ }
+
+ protected override bool Asn1Equals(
+ Asn1Object asn1Object)
+ {
+ return asn1Object is DerNull;
+ }
+
+ protected override int Asn1GetHashCode()
+ {
+ return -1;
+ }
+ }
+}
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