S4U2selfGSS.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 6355584
 * @summary Introduce constrained Kerberos delegation
 * @compile -XDignore.symbol.file S4U2selfGSS.java
 * @run main/othervm -Dsun.security.krb5.debug=false S4U2selfGSS krb5
 * @run main/othervm -Dsun.security.krb5.debug=false S4U2selfGSS spnego
 */

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.ietf.jgss.Oid;
import sun.security.jgss.GSSUtil;

public class S4U2selfGSS {

    public static void main(String[] args) throws Exception {
        Oid mech;
        if (args[0].equals("spnego")) {
            mech = GSSUtil.GSS_SPNEGO_MECH_OID;
        } else if (args[0].contains("krb5")) {
            mech = GSSUtil.GSS_KRB5_MECH_OID;
        } else {
            throw new Exception("Unknown mech");
        }

        OneKDC kdc = new OneKDC(null);
        kdc.writeJAASConf();
        kdc.setOption(KDC.Option.ALLOW_S4U2SELF, Arrays.asList(
                new String[]{OneKDC.USER + "@" + OneKDC.REALM}));
        Map<String,List<String>> map = new HashMap<>();
        map.put(OneKDC.USER + "@" + OneKDC.REALM, Arrays.asList(
                new String[]{OneKDC.SERVER + "@" + OneKDC.REALM}));
        kdc.setOption(KDC.Option.ALLOW_S4U2PROXY, map);

        Context c, s;
        System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
        c = Context.fromThinAir();
        s = Context.fromThinAir();

        c = c.impersonate(OneKDC.USER2);

        c.startAsClient(OneKDC.SERVER, mech);
        s.startAsServer(mech);

        Context.handshake(c, s);

        String n1 = c.x().getSrcName().toString().split("@")[0];
        String n2 = s.x().getSrcName().toString().split("@")[0];
        if (!n1.equals(OneKDC.USER2) || !n2.equals(OneKDC.USER2)) {
            throw new Exception("Impersonate failed");
        }

        s.dispose();
        c.dispose();
    }
}