test/jdk/sun/security/krb5/etype/WeakCrypto.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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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 6844909 8012679
 * @modules java.security.jgss/sun.security.krb5
 *          java.security.jgss/sun.security.krb5.internal.crypto
 * @run main/othervm WeakCrypto
 * @run main/othervm WeakCrypto true
 * @run main/othervm WeakCrypto false
 * @summary support allow_weak_crypto in krb5.conf
 */

import java.io.File;
import java.lang.Exception;
import java.nio.file.Files;
import java.nio.file.Paths;

import sun.security.krb5.internal.crypto.EType;
import sun.security.krb5.EncryptedData;

public class WeakCrypto {
    public static void main(String[] args) throws Exception {
        String conf = "[libdefaults]\n" +
                (args.length > 0 ? ("allow_weak_crypto = " + args[0]) : "");
        Files.write(Paths.get("krb5.conf"), conf.getBytes());
        System.setProperty("java.security.krb5.conf", "krb5.conf");

        boolean expected = args.length != 0 && args[0].equals("true");
        int[] etypes = EType.getBuiltInDefaults();

        boolean found = false;
        for (int i=0, length = etypes.length; i<length; i++) {
            if (etypes[i] == EncryptedData.ETYPE_DES_CBC_CRC ||
                    etypes[i] == EncryptedData.ETYPE_DES_CBC_MD4 ||
                    etypes[i] == EncryptedData.ETYPE_DES_CBC_MD5) {
                found = true;
            }
        }
        if (expected != found) {
            throw new Exception();
        }
    }
}