1 files changed, 72 insertions, 0 deletions
diff --git a/crypto/src/asn1/pkcs/DHParameter.cs b/crypto/src/asn1/pkcs/DHParameter.cs
new file mode 100644
index 000000000..25a091a97
--- /dev/null
+++ b/crypto/src/asn1/pkcs/DHParameter.cs
@@ -0,0 +1,72 @@
+using Org.BouncyCastle.Asn1;
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+    public class DHParameter
+        : Asn1Encodable
+    {
+        internal DerInteger p, g, l;
+
+		public DHParameter(
+            BigInteger	p,
+            BigInteger	g,
+            int			l)
+        {
+            this.p = new DerInteger(p);
+            this.g = new DerInteger(g);
+
+			if (l != 0)
+            {
+                this.l = new DerInteger(l);
+            }
+        }
+
+		public DHParameter(
+            Asn1Sequence seq)
+        {
+            IEnumerator e = seq.GetEnumerator();
+
+			e.MoveNext();
+            p = (DerInteger)e.Current;
+
+			e.MoveNext();
+            g = (DerInteger)e.Current;
+
+			if (e.MoveNext())
+            {
+                l = (DerInteger) e.Current;
+            }
+        }
+
+		public BigInteger P
+		{
+			get { return p.PositiveValue; }
+		}
+
+		public BigInteger G
+		{
+			get { return g.PositiveValue; }
+		}
+
+		public BigInteger L
+		{
+            get { return l == null ? null : l.PositiveValue; }
+        }
+
+		public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector(p, g);
+
+			if (this.l != null)
+            {
+                v.Add(l);
+            }
+
+			return new DerSequence(v);
+        }
+    }
+}