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VOMS service command-line clients

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/**
 * Copyright (c) Istituto Nazionale di Fisica Nucleare, 2006-2014.
 *
 * Licensed 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.italiangrid.voms.clients.util;

import java.io.Console;

import org.bouncycastle.openssl.PasswordFinder;
import org.italiangrid.voms.VOMSError;

/**
 * 
 * @author andreaceccanti
 * 
 */
public class ConsolePasswordFinder implements PasswordFinder {

  private String promptMessage;

  public ConsolePasswordFinder(String prompt) {

    this.promptMessage = prompt;
  }

  public char[] getPassword() {

    Console console = System.console();

    if (console == null)
      throw new VOMSError(
        "Error obtaining password from console: no console found for this JVM!");

    return console.readPassword(promptMessage);
  }

}