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/*

 * @test

 * @bug 6405536

 * @summary Verify that we can use ECGenParameterSpec

 * @author Andreas Sterbenz

 * @library ..

 * @run main/othervm TestECGenSpec

 * @run main/othervm TestECGenSpec sm

 */

import java.security.AlgorithmParameters;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.Provider;

import java.security.interfaces.ECPublicKey;

import java.security.spec.ECGenParameterSpec;

import java.security.spec.ECParameterSpec;

public class TestECGenSpec extends PKCS11Test {

    public static void main(String[] args) throws Exception {

        main(new TestECGenSpec(), args);

    }

    @Override

    public void main(Provider p) throws Exception {

        if (p.getService("Signature", "SHA1withECDSA") == null) {

            System.out.println("Provider does not support ECDSA, skipping...");

            return;

        }

        if (isBadNSSVersion(p)) {

            return;

        }

        String[] names = { "secp256r1", "NIST P-192", "sect163k1", "1.3.132.0.26",

            "X9.62 c2tnb239v1"};

        int curves = 1;

        if (getNSSECC() == ECCState.Extended) {

            curves = names.length;

        }

        int[] lengths = {256, 192, 163, 233, 239};

        for (int i = 0; i < curves; i++) {

            String name = names[i];

            int len = lengths[i];

            System.out.println("Testing " + name + "...");

            ECGenParameterSpec spec = new ECGenParameterSpec(name);

            AlgorithmParameters algParams = AlgorithmParameters.getInstance("EC", p);

            algParams.init(spec);

            ECParameterSpec ecSpec = algParams.getParameterSpec(ECParameterSpec.class);

            System.out.println(ecSpec);

            // no public API to get the curve name, so rely on toString();

            if (ecSpec.toString().contains(name) == false) {

                throw new Exception("wrong curve");

            }

            algParams = AlgorithmParameters.getInstance("EC", p);

            algParams.init(ecSpec);

            ECGenParameterSpec genSpec = algParams.getParameterSpec(ECGenParameterSpec.class);

            System.out.println(genSpec.getName());

            KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", p);

            kpg.initialize(spec);

            KeyPair kp = kpg.generateKeyPair();

            System.out.println(kp.getPrivate());

            ECPublicKey publicKey = (ECPublicKey)kp.getPublic();

            if (publicKey.getParams().getCurve().getField().getFieldSize() != len) {

                throw new Exception("wrong curve");

            }

            System.out.println();

        }

    }

}