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/*___INFO__MARK_BEGIN__*/
/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the Sun Industry Standards Source License Version 1.2
*
* Sun Microsystems Inc., March, 2001
*
*
* Sun Industry Standards Source License Version 1.2
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.2 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2001 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
************************************************************************/
/*___INFO__MARK_END__*/
package com.sun.grid.security.login;
import com.sun.grid.util.SGEUtil;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.TextInputCallback;
import javax.security.auth.callback.TextOutputCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
/**
* This <code>CallbackHandler</code> reads input from the console.
*
* The following callback can be handled:
*
* <ul>
* <li>{@link javax.security.auth.callback.NameCallback}</li>
* <li>{@link javax.security.auth.callback.PasswordCallback}</li>
* <li>{@link javax.security.auth.callback.TextInputCallback}</li>
* <li>{@link javax.security.auth.callback.TextOutputCallback}</li>
* </uL>
*
* It uses the native library juti to turn of echoing.
*
* @see com.sun.grid.util.SGEUtil#getPassword
*/
public class ConsoleCallbackHandler implements CallbackHandler {
private BufferedReader reader;
private String readLine() throws IOException {
if(reader == null) {
reader = new BufferedReader(new InputStreamReader(System.in));
}
return reader.readLine();
}
/**
* Handle callbacks
* @param callbacks array of callbacks
* @throws java.io.IOException on an IO error
* @throws javax.security.auth.callback.UnsupportedCallbackException if a callback
* is not supported
*/
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
for(int i = 0; i < callbacks.length; i++) {
if(callbacks[i] instanceof NameCallback) {
NameCallback cb = (NameCallback)callbacks[i];
System.out.print(cb.getPrompt());
if(cb.getDefaultName() != null) {
System.out.print(" [" + cb.getDefaultName() + "] ");
}
String name = readLine();
if(name.length() == 0) {
name = cb.getDefaultName();
}
cb.setName(name);
} else if(callbacks[i] instanceof TextOutputCallback) {
TextOutputCallback cb = (TextOutputCallback)callbacks[i];
switch(cb.getMessageType()) {
case TextOutputCallback.ERROR:
System.out.print(RB.rb().getString("ccb.error"));
break;
case TextOutputCallback.WARNING:
System.out.print(RB.rb().getString("ccb.warning"));
break;
default:
// do nothing
}
System.out.println(cb.getMessage());
} else if(callbacks[i] instanceof TextInputCallback) {
TextInputCallback cb = (TextInputCallback)callbacks[i];
System.out.print(cb.getPrompt());
if(cb.getDefaultText() != null) {
System.out.print(" [" + cb.getDefaultText() + "] ");
}
String text = readLine();
if(text.length() == 0) {
text = cb.getDefaultText();
}
cb.setText(text);
} else if(callbacks[i] instanceof PasswordCallback) {
PasswordCallback cb = (PasswordCallback)callbacks[i];
cb.setPassword(SGEUtil.getInstance().getPassword(cb.getPrompt()));
} else {
throw new UnsupportedCallbackException(callbacks[i]);
}
}
}
}
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