From 49a2dff91b3b506345e31770f77534b40ac4e381 Mon Sep 17 00:00:00 2001
From: J08nY
Date: Mon, 4 Mar 2019 14:47:08 +0100
Subject: Add better semi-random generation of inputs in tests.

---
 src/cz/crcs/ectester/common/ec/EC_Curve.java | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src/cz/crcs/ectester/common/ec')

diff --git a/src/cz/crcs/ectester/common/ec/EC_Curve.java b/src/cz/crcs/ectester/common/ec/EC_Curve.java
index 6c0d060..2672b8a 100644
--- a/src/cz/crcs/ectester/common/ec/EC_Curve.java
+++ b/src/cz/crcs/ectester/common/ec/EC_Curve.java
@@ -3,6 +3,7 @@ package cz.crcs.ectester.common.ec;
 import cz.crcs.ectester.applet.EC_Consts;
 import cz.crcs.ectester.common.util.ByteUtil;
 import javacard.security.KeyPair;
+import org.bouncycastle.math.ec.ECCurve;
 
 import java.math.BigInteger;
 import java.security.spec.*;
@@ -74,6 +75,28 @@ public class EC_Curve extends EC_Params {
         return new EllipticCurve(field, a, b);
     }
 
+    public ECCurve toBCCurve() {
+        if (this.field == KeyPair.ALG_EC_FP) {
+            BigInteger p = new BigInteger(1, getParam(EC_Consts.PARAMETER_FP)[0]);
+            BigInteger a = new BigInteger(1, getParam(EC_Consts.PARAMETER_A)[0]);
+            BigInteger b = new BigInteger(1, getParam(EC_Consts.PARAMETER_B)[0]);
+            BigInteger r = new BigInteger(1, getParam(EC_Consts.PARAMETER_R)[0]);
+            BigInteger k = new BigInteger(1, getParam(EC_Consts.PARAMETER_K)[0]);
+            return new ECCurve.Fp(p, a, b, r, k);
+        } else {
+            byte[][] fieldData = getParam(EC_Consts.PARAMETER_F2M);
+            int m = ByteUtil.getShort(fieldData[0], 0);
+            int e1 = ByteUtil.getShort(fieldData[1], 0);
+            int e2 = ByteUtil.getShort(fieldData[2], 0);
+            int e3 = ByteUtil.getShort(fieldData[3], 0);
+            BigInteger a = new BigInteger(1, getParam(EC_Consts.PARAMETER_A)[0]);
+            BigInteger b = new BigInteger(1, getParam(EC_Consts.PARAMETER_B)[0]);
+            BigInteger r = new BigInteger(1, getParam(EC_Consts.PARAMETER_R)[0]);
+            BigInteger k = new BigInteger(1, getParam(EC_Consts.PARAMETER_K)[0]);
+            return new ECCurve.F2m(m, e1, e2, e3, a, b, r, k);
+        }
+    }
+
     public ECParameterSpec toSpec() {
         EllipticCurve curve = toCurve();
 
-- 
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