1 files changed, 47 insertions, 0 deletions
diff --git a/src/cz/crcs/ectester/common/ec/CustomECParameterSpec.java b/src/cz/crcs/ectester/common/ec/CustomECParameterSpec.java
new file mode 100644
index 0000000..cbc15e7
--- /dev/null
+++ b/src/cz/crcs/ectester/common/ec/CustomECParameterSpec.java
@@ -0,0 +1,47 @@
+package cz.crcs.ectester.common.ec;
+
+import java.math.BigInteger;
+import java.security.spec.ECFieldFp;
+import java.security.spec.ECParameterSpec;
+import java.security.spec.ECPoint;
+import java.security.spec.EllipticCurve;
+
+/**
+ * @author David Hofman
+ */
+public class CustomECParameterSpec extends ECParameterSpec {
+    private EllipticCurve curve;
+    private ECPoint g;
+    private BigInteger n;
+    private int h;
+
+    public CustomECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h) {
+        //feed the constructor of the superclass some default, valid data
+        //getters will return custom (and possibly invalid) parameters instead
+        super(new EllipticCurve(new ECFieldFp(BigInteger.ONE),BigInteger.ZERO,BigInteger.ZERO), new ECPoint(BigInteger.ZERO, BigInteger.ZERO), BigInteger.ONE, 1);
+        this.curve = curve;
+        this.g = g;
+        this.n = n;
+        this.h = h;
+    }
+
+    @Override
+    public EllipticCurve getCurve() {
+        return curve;
+    }
+
+    @Override
+    public ECPoint getGenerator() {
+        return g;
+    }
+
+    @Override
+    public BigInteger getOrder() {
+        return n;
+    }
+
+    @Override
+    public int getCofactor() {
+        return h;
+    }
+}