Encode.java

/*
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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import sun.security.x509.*;
import sun.security.util.*;

/**
 * @test
 * @author Sean Mullan
 * @bug 4716972
 * @summary Check that GeneralName.encode() encodes an X500Name with
 *      an explicit tag
 * @modules java.base/sun.security.util
 *          java.base/sun.security.x509
 */
public class Encode {

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

        GeneralName gn = new GeneralName(new X500Name("cn=john"));
        DerOutputStream dos = new DerOutputStream();
        gn.encode(dos);
        DerValue dv = new DerValue(dos.toByteArray());
        short tag = (byte)(dv.tag & 0x1f);
        if (tag != GeneralNameInterface.NAME_DIRECTORY) {
            throw new Exception("Invalid tag for Directory name");
        }
        if (!dv.isContextSpecific() || !dv.isConstructed()) {
            throw new Exception("Invalid encoding of Directory name");
        }
        DerInputStream data = dv.getData();
        DerValue[] seq = data.getSequence(5);
    }
}