/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 6337925

 * @summary Ensure that callers cannot modify the internal JarEntry cert and

 *          codesigner arrays.

 * @author Sean Mullan

 */

import java.io.InputStream;

import java.security.CodeSigner;

import java.security.cert.Certificate;

import java.util.*;

import java.util.jar.*;

public class GetMethodsReturnClones {

    private final static String BASE = System.getProperty("test.src", ".") +

        System.getProperty("file.separator");

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

        List<JarEntry> entries = new ArrayList<>();

        try (JarFile jf = new JarFile(BASE + "test.jar", true)) {

            byte[] buffer = new byte[8192];

            Enumeration<JarEntry> e = jf.entries();

            while (e.hasMoreElements()) {

                JarEntry je = e.nextElement();

                entries.add(je);

                try (InputStream is = jf.getInputStream(je)) {

                    while (is.read(buffer, 0, buffer.length) != -1) {

                        // we just read. this will throw a SecurityException

                        // if  a signature/digest check fails.

                    }

                }

            }

        }

        for (JarEntry je : entries) {

            Certificate[] certs = je.getCertificates();

            CodeSigner[] signers = je.getCodeSigners();

            if (certs != null) {

                certs[0] = null;

                certs = je.getCertificates();

                if (certs[0] == null) {

                    throw new Exception("Modified internal certs array");

                }

            }

            if (signers != null) {

                signers[0] = null;

                signers = je.getCodeSigners();

                if (signers[0] == null) {

                    throw new Exception("Modified internal codesigners array");

                }

            }

        }

    }

}