    private void testGeneration()
        throws Exception
    {
        //
        // ECDSA generation test
        //
        byte[] data = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
        Signature s = Signature.getInstance("ECDSA", "BC");
        KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "BC");

        EllipticCurve curve = new EllipticCurve(
            new ECFieldFp(new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839")), // q
            new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
            new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

        ECParameterSpec ecSpec = new ECParameterSpec(
            curve,
            ECPointUtil.decodePoint(curve, Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
            new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307"), // n
            1); // h

        g.initialize(ecSpec, new SecureRandom());

        KeyPair p = g.generateKeyPair();

        PrivateKey sKey = p.getPrivate();
        PublicKey vKey = p.getPublic();

        s.initSign(sKey);

        s.update(data);

        byte[] sigBytes = s.sign();

        s = Signature.getInstance("ECDSA", "BC");

        s.initVerify(vKey);

        s.update(data);

        if (!s.verify(sigBytes))
        {
            fail("ECDSA verification failed");
        }

        testKeyFactory((ECPublicKey)vKey, (ECPrivateKey)sKey);
        testSerialise((ECPublicKey)vKey, (ECPrivateKey)sKey);
    }
The software does not verify, or incorrectly verifies, the cryptographic signature for data.