Java example source code file (TestPRF.java)

This example Java source code file (TestPRF.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bufferedreader, crypto, error, exception, file, fileinputstream, inputstreamreader, keygenerator, secretkey, secretkeyspec, security, string, suntlsprf, testprf, tlsprfparameterspec, unknown, util

The TestPRF.java Java example source code

/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * 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 6316539 6345251
 * @summary Basic known-answer-test for TlsPrf
 * @author Andreas Sterbenz
 * @library ..
 */

import java.io.*;
import java.util.*;

import java.security.Security;
import java.security.Provider;

import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;

import javax.crypto.spec.*;

import sun.security.internal.spec.*;

public class TestPRF extends PKCS11Test {

    private static int PREFIX_LENGTH = "prf-output: ".length();

    public static void main(String[] args) throws Exception {
        main(new TestPRF());
    }

    public void main(Provider provider) throws Exception {
        if (provider.getService("KeyGenerator", "SunTlsPrf") == null) {
            System.out.println("Provider does not support algorithm, skipping");
            return;
        }

        InputStream in = new FileInputStream(new File(BASE, "prfdata.txt"));
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));

        int n = 0;
        int lineNumber = 0;

        byte[] secret = null;
        String label = null;
        byte[] seed = null;
        int length = 0;
        byte[] output = null;

        while (true) {
            String line = reader.readLine();
            lineNumber++;
            if (line == null) {
                break;
            }
            if (line.startsWith("prf-") == false) {
                continue;
            }

            String data = line.substring(PREFIX_LENGTH);
            if (line.startsWith("prf-secret:")) {
                secret = parse(data);
            } else if (line.startsWith("prf-label:")) {
                label = data;
            } else if (line.startsWith("prf-seed:")) {
                seed = parse(data);
            } else if (line.startsWith("prf-length:")) {
                length = Integer.parseInt(data);
            } else if (line.startsWith("prf-output:")) {
                output = parse(data);

                System.out.print(".");
                n++;

                KeyGenerator kg =
                    KeyGenerator.getInstance("SunTlsPrf", provider);
                SecretKey inKey;
                if (secret == null) {
                    inKey = null;
                } else {
                    inKey = new SecretKeySpec(secret, "Generic");
                }
                TlsPrfParameterSpec spec =
                    new TlsPrfParameterSpec(inKey, label, seed, length,
                        null, -1, -1);
                SecretKey key;
                try {
                    kg.init(spec);
                    key = kg.generateKey();
                } catch (Exception e) {
                    if (secret == null) {
                        // This fails on Solaris, but since we never call this
                        // API for this case in JSSE, ignore the failure.
                        // (SunJSSE uses the CKM_TLS_KEY_AND_MAC_DERIVE
                        // mechanism)
                        System.out.print("X");
                        continue;
                    }
                    System.out.println();
                    throw new Exception("Error on line: " + lineNumber, e);
                }
                byte[] enc = key.getEncoded();
                if (Arrays.equals(output, enc) == false) {
                    System.out.println();
                    System.out.println("expected: " + toString(output));
                    System.out.println("actual:   " + toString(enc));
                    throw new Exception("mismatch line: " + lineNumber);
                }
            } else {
                throw new Exception("Unknown line: " + line);
            }
        }
        if (n == 0) {
            throw new Exception("no tests");
        }
        in.close();
        System.out.println();
        System.out.println("OK: " + n + " tests");
    }

}