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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8202299 8231107
 * @modules java.base/sun.security.tools.keytool
 *          java.base/sun.security.x509
 * @library /test/lib
 * @summary Testing empty (any of null, "", "\0") password behaviors
 */

import jdk.test.lib.Asserts;
import sun.security.tools.keytool.CertAndKeyGen;
import sun.security.x509.X500Name;

import java.io.File;
import java.io.FileOutputStream;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.util.Arrays;

public class EmptyPassword {

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

        // KeyStore is protected with password "\0".
        CertAndKeyGen gen = new CertAndKeyGen("RSA", "SHA256withRSA");
        gen.generate(2048);
        KeyStore ks = KeyStore.getInstance("PKCS12");
        ks.load(null, null);
        ks.setKeyEntry("a", gen.getPrivateKey(), new char[1],
                new Certificate[] {
                        gen.getSelfCertificate(new X500Name("CN=Me"), 100)
                });

        // 8202299: interop between new char[0] and new char[1]
        store(ks, "p12", new char[1]);

        // It can be loaded with password "".
        ks = KeyStore.getInstance(new File("p12"), new char[0]);
        Asserts.assertTrue(ks.getKey("a", new char[0]) != null);
        Asserts.assertTrue(ks.getCertificate("a") != null);

        ks = KeyStore.getInstance(new File("p12"), new char[1]);
        Asserts.assertTrue(ks.getKey("a", new char[1]) != null);
        Asserts.assertTrue(ks.getCertificate("a") != null);

        // 8231107: Store with null password makes it password-less
        store(ks, "p00", null);

        // Can read cert and key with any password
        for (char[] pass: new char[][] {
                new char[0],    // password actually used before 8202299
                new char[1],    // the interoperability before 8202299
                null,           // password-less after 8202299
                "whatever".toCharArray()
        }) {
            System.out.println("with password " + Arrays.toString(pass));
            ks = KeyStore.getInstance(new File("p00"), pass);
            Asserts.assertTrue(ks.getKey("a", new char[1]) != null);
            Asserts.assertTrue(ks.getCertificate("a") != null);
        }
    }

    static void store(KeyStore ks, String file, char[] pass) throws Exception {
        try (FileOutputStream fos = new FileOutputStream(file)) {
            ks.store(fos, pass);
        }
    }
}