1 files changed, 104 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/pkcs/DHParameter.java b/core/src/main/java/org/spongycastle/asn1/pkcs/DHParameter.java
new file mode 100644
index 00000000..a427ca21
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/asn1/pkcs/DHParameter.java
@@ -0,0 +1,104 @@
+package org.spongycastle.asn1.pkcs;
+
+import java.math.BigInteger;
+import java.util.Enumeration;
+
+import org.spongycastle.asn1.ASN1EncodableVector;
+import org.spongycastle.asn1.ASN1Integer;
+import org.spongycastle.asn1.ASN1Object;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.ASN1Sequence;
+import org.spongycastle.asn1.DERSequence;
+
+public class DHParameter
+    extends ASN1Object
+{
+    ASN1Integer      p, g, l;
+
+    public DHParameter(
+        BigInteger  p,
+        BigInteger  g,
+        int         l)
+    {
+        this.p = new ASN1Integer(p);
+        this.g = new ASN1Integer(g);
+
+        if (l != 0)
+        {
+            this.l = new ASN1Integer(l);
+        }
+        else
+        {
+            this.l = null;
+        }
+    }
+
+    public static DHParameter getInstance(
+        Object  obj)
+    {
+        if (obj instanceof DHParameter)
+        {
+            return (DHParameter)obj;
+        }
+
+        if (obj != null)
+        {
+            return new DHParameter(ASN1Sequence.getInstance(obj));
+        }
+
+        return null;
+    }
+
+    private DHParameter(
+        ASN1Sequence  seq)
+    {
+        Enumeration     e = seq.getObjects();
+
+        p = ASN1Integer.getInstance(e.nextElement());
+        g = ASN1Integer.getInstance(e.nextElement());
+
+        if (e.hasMoreElements())
+        {
+            l = (ASN1Integer)e.nextElement();
+        }
+        else
+        {
+            l = null;
+        }
+    }
+
+    public BigInteger getP()
+    {
+        return p.getPositiveValue();
+    }
+
+    public BigInteger getG()
+    {
+        return g.getPositiveValue();
+    }
+
+    public BigInteger getL()
+    {
+        if (l == null)
+        {
+            return null;
+        }
+
+        return l.getPositiveValue();
+    }
+
+    public ASN1Primitive toASN1Primitive()
+    {
+        ASN1EncodableVector  v = new ASN1EncodableVector();
+
+        v.add(p);
+        v.add(g);
+
+        if (this.getL() != null)
+        {
+            v.add(l);
+        }
+
+        return new DERSequence(v);
+    }
+}