Security Manager Test : SecurityManager « Security « Java

1. Java
2. Security
3. SecurityManager

Security Manager Test

   
/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
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 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution 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.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
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 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
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import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class SecurityManagerTest {
  public static void main(String[] args) throws Exception {
    try {
      System
          .setSecurityManager(new PasswordSecurityManager(
              "Booga Booga"));
    } catch (SecurityException se) {
      System.err.println("SecurityManager already set!");
    }

    DataInputStream in = new DataInputStream(new FileInputStream(
        "inputtext.txt"));
    DataOutputStream out = new DataOutputStream(new FileOutputStream(
        "outputtext.txt"));
    String inputString;
    while ((inputString = in.readLine()) != null) {
      out.writeBytes(inputString);
      out.writeByte('\n');
    }
    in.close();
    out.close();
  }
}

class PasswordSecurityManager extends SecurityManager {

  private String password;

  public PasswordSecurityManager(String password) {
    super();
    this.password = password;
  }

  private boolean accessOK() {
    int c;
    DataInputStream in = new DataInputStream(System.in);
    String response;

    System.out.println("What's the secret password?");
    try {
      response = in.readLine();
      if (response.equals(password))
        return true;
      else
        return false;
    } catch (IOException e) {
      return false;
    }
  }

  public void checkRead(FileDescriptor filedescriptor) {
    if (!accessOK())
      throw new SecurityException("Not a Chance!");
  }

  public void checkRead(String filename) {
    if (!accessOK())
      throw new SecurityException("No Way!");
  }

  public void checkRead(String filename, Object executionContext) {
    if (!accessOK())
      throw new SecurityException("Forget It!");
  }

  public void checkWrite(FileDescriptor filedescriptor) {
    if (!accessOK())
      throw new SecurityException("Not!");
  }

  public void checkWrite(String filename) {
    if (!accessOK())
      throw new SecurityException("Not Even!");
  }
}
           
         
    
    
  

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