1 files changed, 95 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/test/ECNRTest.java b/libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/test/ECNRTest.java
new file mode 100644
index 000000000..1f3dfe721
--- /dev/null
+++ b/libraries/spongycastle/core/src/test/java/org/spongycastle/crypto/test/ECNRTest.java
@@ -0,0 +1,95 @@
+package org.spongycastle.crypto.test;
+
+import java.math.BigInteger;
+import java.security.SecureRandom;
+
+import org.spongycastle.crypto.params.ECDomainParameters;
+import org.spongycastle.crypto.params.ECPrivateKeyParameters;
+import org.spongycastle.crypto.params.ECPublicKeyParameters;
+import org.spongycastle.crypto.params.ParametersWithRandom;
+import org.spongycastle.crypto.signers.ECNRSigner;
+import org.spongycastle.math.ec.ECCurve;
+import org.spongycastle.util.BigIntegers;
+import org.spongycastle.util.encoders.Hex;
+import org.spongycastle.util.test.FixedSecureRandom;
+import org.spongycastle.util.test.SimpleTest;
+
+/**
+ * ECNR tests.
+ */
+public class ECNRTest
+    extends SimpleTest
+{
+    /**
+     * a basic regression test with 239 bit prime
+     */
+    BigInteger r = new BigInteger("308636143175167811492623515537541734843573549327605293463169625072911693");
+    BigInteger s = new BigInteger("852401710738814635664888632022555967400445256405412579597015412971797143");
+
+    byte[] kData = BigIntegers.asUnsignedByteArray(new BigInteger("700000017569056646655505781757157107570501575775705779575555657156756655"));
+
+    SecureRandom    k = new FixedSecureRandom(true, kData);
+
+    private void ecNR239bitPrime()
+    {
+        ECCurve.Fp curve = new ECCurve.Fp(
+            new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
+            new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
+            new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
+
+        ECDomainParameters params = new ECDomainParameters(
+            curve,
+            curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
+            new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n
+
+        ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
+            new BigInteger("876300101507107567501066130761671078357010671067781776716671676178726717"), // d
+            params);
+
+        ECNRSigner ecnr = new ECNRSigner();
+        ParametersWithRandom param = new ParametersWithRandom(priKey, k);
+
+        ecnr.init(true, param);
+
+        byte[] message = new BigInteger("968236873715988614170569073515315707566766479517").toByteArray();
+        BigInteger[] sig = ecnr.generateSignature(message);
+
+        if (!r.equals(sig[0]))
+        {
+            fail("r component wrong.", r, sig[0]);
+        }
+
+        if (!s.equals(sig[1]))
+        {
+            fail("s component wrong.", s, sig[1]);
+        }
+
+        // Verify the signature
+        ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
+            curve.decodePoint(Hex.decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
+            params);
+
+        ecnr.init(false, pubKey);
+        if (!ecnr.verifySignature(message, sig[0], sig[1]))
+        {
+            fail("signature fails");
+        }
+    }
+
+    public String getName()
+    {
+        return "ECNR";
+    }
+
+    public void performTest()
+    {
+        ecNR239bitPrime();
+    }
+
+    public static void main(
+        String[]    args)
+    {
+        runTest(new ECNRTest());
+    }
+}
+