Amended elliptic curve code

crypto/WeierstrassCurve.java

@@ -7,4 +7,11 @@ public class WeierstrassCurve
     public BigInteger a;
     public BigInteger b;
     public BigInteger mod;
+
+    public WeierstrassCurve(BigInteger a, BigInteger b, BigInteger mod)
+    {
+        this.a = a;
+        this.b = b;
+        this.mod = mod;
+    }
 }

crypto/WeierstrassPoint.java

@@ -52,4 +52,20 @@ public class WeierstrassPoint {
         y = x.add(this.x.negate()).multiply(m).add(this.y);
         return new WeierstrassPoint(this.curve, x, y);
     }
+
+    public WeierstrassPoint mult(BigInteger n)
+    {
+        if (n.compareTo(BigInteger.ZERO) == 0)
+        {
+            return new WeierstrassPoint(this.curve);
+        }
+        WeierstrassPoint half = this.mult(n.shiftRight(1));
+        if (n.getLowestSetBit() == 0)
+        {
+            return this.add(half).add(half);
+        } else
+        {
+            return half.add(half);
+        }
+    }
 }