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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.input;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.util.ReflectUtil;
/**
* Prompts and requests input. May loop until a valid input has
* been entered. Doesn't echo input (requires Java6). If Java6 is not
* available, falls back to the DefaultHandler (insecure).
* @since Ant 1.7.1
*/
public class SecureInputHandler extends DefaultInputHandler {
/**
* Default no-args constructor
*/
public SecureInputHandler() {
}
/**
* Handle the input
* @param request the request to handle
* @throws BuildException if not possible to read from console
*/
public void handleInput(InputRequest request) throws BuildException {
String prompt = getPrompt(request);
try {
Object console = ReflectUtil.invokeStatic(System.class, "console");
do {
char[] input = (char[]) ReflectUtil.invoke(
console, "readPassword", String.class, prompt,
Object[].class, (Object[]) null);
request.setInput(new String(input));
/* for security zero char array after retrieving value */
java.util.Arrays.fill(input, ' ');
} while (!request.isInputValid());
} catch (Exception e) {
/* Java6 not present use default handler */
super.handleInput(request);
}
}
}
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