/* Copyright  (c) 2002 Graz University of Technology. All rights reserved.
 *
 * Redistribution and use in  source and binary forms, with or without 
 * modification, are permitted  provided that the following conditions are met:
 *
 * 1. Redistributions of  source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in  binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  
 * 3. The end-user documentation included with the redistribution, if any, must
 *    include the following acknowledgment:
 * 
 *    "This product includes software developed by IAIK of Graz University of
 *     Technology."
 * 
 *    Alternately, this acknowledgment may appear in the software itself, if 
 *    and wherever such third-party acknowledgments normally appear.
 *  
 * 4. The names "Graz University of Technology" and "IAIK of Graz University of
 *    Technology" must not be used to endorse or promote products derived from 
 *    this software without prior written permission.
 *  
 * 5. Products derived from this software may not be called 
 *    "IAIK PKCS Wrapper", nor may "IAIK" appear in their name, without prior 
 *    written permission of Graz University of Technology.
 *  
 *  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 *  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 *  OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY  OF SUCH DAMAGE.
 */

package demo.pkcs.pkcs11;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

import iaik.pkcs.pkcs11.Info;
import iaik.pkcs.pkcs11.InitializeArgs;
import iaik.pkcs.pkcs11.Module;
import iaik.pkcs.pkcs11.MutexHandler;



/**
 * This demo program tries to call initialize with some arguments.
 *
 * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
 * @version 0.1
 * @invariants
 */
public class InitArgs implements InitializeArgs {

  static PrintWriter output_;

  static {
    try {
      //output_ = new PrintWriter(new FileWriter("GetInfo_output.txt"), true);
      output_ = new PrintWriter(System.out, true);
    } catch (Throwable thr) {
      thr.printStackTrace();
      output_ = new PrintWriter(System.out, true);
    }
  }

  public static void main(String[] args) {
    if ((args.length == 1) || (args.length == 2)){
      try {
        output_.println("################################################################################");
        output_.println("load and initialize module \"" + args[0] + "\" using InitializeArgs");
        output_.flush();
        Module pkcs11Module = Module.getInstance(args[0]);
        byte[] reservedParameter = (args.length >= 2) ? readStream(new FileInputStream(args[1])) : null;
        InitializeArgs initArgs = new InitArgs(reservedParameter);
        pkcs11Module.initialize(initArgs);

        Info info = pkcs11Module.getInfo();
        output_.println(info);
        output_.println("################################################################################");
      } catch (Throwable ex) {
        ex.printStackTrace();
      }
    } else {
      printUsage();
    }
    System.gc(); // to finalize and disconnect the pkcs11Module
  }

  protected static void printUsage() {
    output_.println("InitArgs <PKCS#11 module name> [<file providing reserved parameter>]");
    output_.println("e.g.: InitArgs slbck.dll");
  }
  
  /**
   * Read the contents of the stream into a byte array. The stream is read
   * until it returns EOF.
   */
  protected static byte[] readStream(InputStream in) 
      throws IOException 
  {
    ByteArrayOutputStream bufferStream = new ByteArrayOutputStream(256); // initial size
    int bytesRead;
    byte[] buffer = new byte[256];
    while((bytesRead = in.read(buffer)) >= 0) {
      bufferStream.write(buffer, 0, bytesRead);
    }
    return bufferStream.toByteArray() ;
  }
  
  protected byte[] reservedParameter_;
  
  public InitArgs(byte[] reservedParameter) {
    reservedParameter_ = reservedParameter;
  }

  /**
   * Get the handler object that handes mutex objects.
   *
   * @return The mutex handler object or null, if there is none set.
   * @preconditions
   * @postconditions
   */
  public MutexHandler getMutexHandler() {
    output_.println("getMutexHandler() called");
    return null ;
  }

  /**
   * Checks, if the library is not allowed to create operating system threads.
   *
   * @return True, if the library is not allowed to create operating system
   *         threads; false, otherwise.
   * @preconditions
   * @postconditions
   */
  public boolean isLibraryCantCreateOsThreads() {
    output_.println("isLibraryCantCreateOsThreads() called");
    return false ;
  }

  /**
   * Checks, if the library is allowed to use locking mechanisms of the
   * operating system.
   *
   * @return True, if the library is allowed to use locking mechanisms of the
   *         operating system.
   * @preconditions
   * @postconditions
   */
  public boolean isOsLockingOk() {
    output_.println("isOsLockingOk() called");
    return true ;
  }

  /**
   * Get the reserved parameter. This is always null as of version 2.11 of
   * PKCS#11.
   *
   * @return null as of version 2.11 of PKCS#11.
   * @preconditions
   * @postconditions (result == null)
   */
  public java.lang.Object getReserved() {
    output_.println("getReserved() called");
    return reservedParameter_ ;
  }

}