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/*

 * @test

 * @bug 7196382 8072452

 * @summary Ensure that DH key pairs can be generated for 512 - 8192 bits

 * @author Valerie Peng

 * @modules jdk.crypto.cryptoki

 * @run main/othervm TestDH2048

 * @run main/othervm TestDH2048 sm

 */

import java.security.InvalidParameterException;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.Provider;

public class TestDH2048 extends PKCS11Test {

    private static void checkUnsupportedKeySize(KeyPairGenerator kpg, int ks)

        throws Exception {

        try {

            kpg.initialize(ks);

            throw new Exception("Expected IPE not thrown for " + ks);

        } catch (InvalidParameterException ipe) {

        }

    }

    @Override

    public void main(Provider p) throws Exception {

        if (p.getService("KeyPairGenerator", "DH") == null) {

            System.out.println("KPG for DH not supported, skipping");

            return;

        }

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

        kpg.initialize(512);

        KeyPair kp1 = kpg.generateKeyPair();

        kpg.initialize(768);

        kp1 = kpg.generateKeyPair();

        kpg.initialize(1024);

        kp1 = kpg.generateKeyPair();

        kpg.initialize(1536);

        kp1 = kpg.generateKeyPair();

        kpg.initialize(2048);

        kp1 = kpg.generateKeyPair();

        try {

            kpg.initialize(3072);

            kp1 = kpg.generateKeyPair();

            kpg.initialize(4096);

            kp1 = kpg.generateKeyPair();

            kpg.initialize(6144);

            kp1 = kpg.generateKeyPair();

            kpg.initialize(8192);

            kp1 = kpg.generateKeyPair();

        } catch (InvalidParameterException ipe) {

            // NSS (as of version 3.13) has a hard coded maximum limit

            // of 2236 or 3072 bits for DHE keys.

            System.out.println("4096-bit DH key pair generation: " + ipe);

            if (!p.getName().equals("SunPKCS11-NSS")) {

                throw ipe;

            }

        }

        // key size must be multiples of 64 though

        checkUnsupportedKeySize(kpg, 2048 + 63);

        checkUnsupportedKeySize(kpg, 3072 + 32);

    }

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

        main(new TestDH2048(), args);

    }

}