    001    /* Copyright  (c) 2002 Graz University of Technology. All rights reserved.
    002     *
    003     * Redistribution and use in  source and binary forms, with or without
    004     * modification, are permitted  provided that the following conditions are met:
    005     *
    006     * 1. Redistributions of  source code must retain the above copyright notice,
    007     *    this list of conditions and the following disclaimer.
    008     *
    009     * 2. Redistributions in  binary form must reproduce the above copyright notice,
    010     *    this list of conditions and the following disclaimer in the documentation
    011     *    and/or other materials provided with the distribution.
    012     *
    013     * 3. The end-user documentation included with the redistribution, if any, must
    014     *    include the following acknowledgment:
    015     *
    016     *    "This product includes software developed by IAIK of Graz University of
    017     *     Technology."
    018     *
    019     *    Alternately, this acknowledgment may appear in the software itself, if
    020     *    and wherever such third-party acknowledgments normally appear.
    021     *
    022     * 4. The names "Graz University of Technology" and "IAIK of Graz University of
    023     *    Technology" must not be used to endorse or promote products derived from
    024     *    this software without prior written permission.
    025     *
    026     * 5. Products derived from this software may not be called
    027     *    "IAIK PKCS Wrapper", nor may "IAIK" appear in their name, without prior
    028     *    written permission of Graz University of Technology.
    029     *
    030     *  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
    031     *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    032     *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    033     *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE
    034     *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    035     *  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    036     *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
    037     *  OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
    038     *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    039     *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    040     *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    041     *  POSSIBILITY  OF SUCH DAMAGE.
    042     */
    043
    044    package demo.pkcs.pkcs11;
    045
    046    import java.io.FileOutputStream;
    047
    048    import iaik.pkcs.pkcs11.Module;
    049    import iaik.pkcs.pkcs11.Session;
    050    import iaik.pkcs.pkcs11.Slot;
    051    import iaik.pkcs.pkcs11.Token;
    052
    053
    054
    055    /**
    056     * This demo program uses a PKCS#11 module to produce random data.
    057     * Optionally the random data can be written to file.
    058     *
    059     * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
    060     * @version 0.1
    061     * @invariants
    062     */
    063    public class GenerateRandom {
    064
    065      public static void main(String[] args) {
    066        if ((args.length != 2) && (args.length != 3)) {
    067          printUsage();
    068          System.exit(1);
    069        }
    070        int numberOfBytes = -1;
    071        try {
    072          numberOfBytes = Integer.parseInt(args[1]);
    073        } catch (Exception ex) {
    074          printUsage();
    075          System.exit(1);
    076        }
    077
    078        try {
    079
    080            Module pkcs11Module = Module.getInstance(args[0]);
    081            pkcs11Module.initialize(null);
    082
    083            Slot[] slots = pkcs11Module.getSlotList(Module.SlotRequirement.TOKEN_PRESENT);
    084
    085            if (slots.length == 0) {
    086              System.out.println("No slot with present token found!");
    087              System.exit(0);
    088            }
    089
    090            Slot selectedSlot = slots[0];
    091            Token token = selectedSlot.getToken();
    092
    093            Session session =
    094                token.openSession(Token.SessionType.SERIAL_SESSION, Token.SessionReadWriteBehavior.RO_SESSION, null, null);
    095
    096            System.out.println("################################################################################");
    097            System.out.print("generating " + numberOfBytes + " bytes of random data... ");
    098
    099            byte[] dataBuffer = session.generateRandom(numberOfBytes);
    100
    101            System.out.println("finished");
    102            System.out.println("################################################################################");
    103
    104
    105            if (args.length == 3) {
    106              System.out.println("################################################################################");
    107              System.out.println("writing random data to file : " + args[2]);
    108
    109              FileOutputStream dataOutput = new FileOutputStream(args[2]);
    110              dataOutput.write(dataBuffer);
    111              dataOutput.flush();
    112              dataOutput.close();
    113              System.out.println("################################################################################");
    114            }
    115
    116            session.closeSession();
    117            pkcs11Module.finalize(null);
    118
    119        } catch (Throwable thr) {
    120          thr.printStackTrace();
    121        }
    122      }
    123
    124      public static void printUsage() {
    125        System.out.println("Usage: GenerateRandom <PKCS#11 module> <number of bytes> [<output file>]");
    126        System.out.println(" e.g.: GenerateRandom pk2priv.dll 128 random.dat");
    127        System.out.println("The given DLL must be in the search path of the system.");
    128      }
    129
    130    }