SecurityManagerTest.java Source code

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Here is the source code for SecurityManagerTest.java

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/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * 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
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
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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!");
    }
}