1 files changed, 56 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/math/ec/WNafPreCompInfo.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/math/ec/WNafPreCompInfo.java
new file mode 100644
index 000000000..4a7b7e31c
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/math/ec/WNafPreCompInfo.java
@@ -0,0 +1,56 @@
+package org.spongycastle.math.ec;
+
+/**
+ * Class holding precomputation data for the WNAF (Window Non-Adjacent Form)
+ * algorithm.
+ */
+public class WNafPreCompInfo implements PreCompInfo
+{
+    /**
+     * Array holding the precomputed <code>ECPoint</code>s used for a Window
+     * NAF multiplication.
+     */
+    private ECPoint[] preComp = null;
+
+    /**
+     * Array holding the negations of the precomputed <code>ECPoint</code>s used
+     * for a Window NAF multiplication.
+     */
+    private ECPoint[] preCompNeg = null;
+
+    /**
+     * Holds an <code>ECPoint</code> representing twice(this). Used for the
+     * Window NAF multiplication to create or extend the precomputed values.
+     */
+    private ECPoint twiceP = null;
+
+    protected ECPoint[] getPreComp()
+    {
+        return preComp;
+    }
+
+    protected ECPoint[] getPreCompNeg()
+    {
+        return preCompNeg;
+    }
+
+    protected void setPreComp(ECPoint[] preComp)
+    {
+        this.preComp = preComp;
+    }
+
+    protected void setPreCompNeg(ECPoint[] preCompNeg)
+    {
+        this.preCompNeg = preCompNeg;
+    }
+
+    protected ECPoint getTwiceP()
+    {
+        return twiceP;
+    }
+
+    protected void setTwiceP(ECPoint twiceP)
+    {
+        this.twiceP = twiceP;
+    }
+}