1 files changed, 2 insertions, 27 deletions
diff --git a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Curve.java b/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Curve.java
index bbb02701..c8443299 100644
--- a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Curve.java
+++ b/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Curve.java
@@ -5,10 +5,9 @@ import java.math.BigInteger;
 import org.bouncycastle.math.ec.ECCurve;
 import org.bouncycastle.math.ec.ECFieldElement;
 import org.bouncycastle.math.ec.ECPoint;
-import org.bouncycastle.math.field.FiniteFields;
 import org.bouncycastle.util.encoders.Hex;
 
-public class SecP224R1Curve extends ECCurve
+public class SecP224R1Curve extends ECCurve.AbstractFp
 {
     public static final BigInteger q = new BigInteger(1,
         Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001"));
@@ -19,7 +18,7 @@ public class SecP224R1Curve extends ECCurve
 
     public SecP224R1Curve()
     {
-        super(FiniteFields.getPrimeField(q));
+        super(q);
 
         this.infinity = new SecP224R1Point(this, null, null);
 
@@ -74,30 +73,6 @@ public class SecP224R1Curve extends ECCurve
         return new SecP224R1Point(this, x, y, zs, withCompression);
     }
 
-    protected ECPoint decompressPoint(int yTilde, BigInteger X1)
-    {
-        ECFieldElement x = fromBigInteger(X1);
-        ECFieldElement alpha = x.square().add(getA()).multiply(x).add(getB());
-        ECFieldElement beta = alpha.sqrt();
-
-        //
-        // if we can't find a sqrt we haven't got a point on the
-        // curve - run!
-        //
-        if (beta == null)
-        {
-            throw new RuntimeException("Invalid point compression");
-        }
-
-        if (beta.testBitZero() != (yTilde == 1))
-        {
-            // Use the other root
-            beta = beta.negate();
-        }
-
-        return new SecP224R1Point(this, x, beta, true);
-    }
-
     public ECPoint getInfinity()
     {
         return infinity;