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/**
 * @test
 * @bug 4955844
 * @library /test/lib
 * @summary ensure that the NONEwithRSA adapter works correctly
 * @author Andreas Sterbenz
 * @key randomness
 */

import java.util.*;

import java.security.*;

import javax.crypto.*;
import jdk.test.lib.security.SecurityUtils;

public class NONEwithRSA {

    public static void main(String[] args) throws Exception {
//      showProvider(Security.getProvider(System.getProperty("test.provider.name", "SUN")));
        Random random = new Random();
        byte[] b = new byte[16];
        random.nextBytes(b);

        String kpgAlgorithm = "RSA";
        KeyPairGenerator kpg = KeyPairGenerator.getInstance(kpgAlgorithm);
        kpg.initialize(SecurityUtils.getTestKeySize(kpgAlgorithm));
        KeyPair kp = kpg.generateKeyPair();

        Signature sig = Signature.getInstance("NONEwithRSA");
        sig.initSign(kp.getPrivate());
        System.out.println("Provider: " + sig.getProvider());
        sig.update(b);
        byte[] sb = sig.sign();

        sig.initVerify(kp.getPublic());
        sig.update(b);
        if (sig.verify(sb) == false) {
            throw new Exception("verification failed");
        }

        Cipher c = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        c.init(Cipher.DECRYPT_MODE, kp.getPublic());
        byte[] dec = c.doFinal(sb);
        if (Arrays.equals(dec, b) == false) {
            throw new Exception("decryption failed");
        }

        sig = Signature.getInstance("NONEwithRSA",
                System.getProperty("test.provider.name", "SunJCE"));
        sig.initSign(kp.getPrivate());
        sig = Signature.getInstance("NONEwithRSA", Security.getProvider(
                System.getProperty("test.provider.name", "SunJCE")));
        sig.initSign(kp.getPrivate());

        try {
            Signature.getInstance("NONEwithRSA", "SUN");
            throw new Exception("call succeeded");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        System.out.println("OK");
    }

    private static void showProvider(Provider p) {
        System.out.println(p);
        for (Iterator t = p.getServices().iterator(); t.hasNext(); ) {
            System.out.println(t.next());
        }
    }

}