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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 javax.security.auth.callback;
- import java.io.Serializable;
- import java.util.Arrays;
- import org.apache.harmony.auth.internal.nls.Messages;
- /**
- * Is used in conjunction with a {@link CallbackHandler} to retrieve a password
- * when needed.
- */
- public class PasswordCallback implements Callback, Serializable {
- private static final long serialVersionUID = 2267422647454909926L;
- private String prompt;
- boolean echoOn;
- private char[] inputPassword;
- private void setPrompt(String prompt) throws IllegalArgumentException {
- if (prompt == null || prompt.length() == 0) {
- throw new IllegalArgumentException(Messages.getString("auth.14")); //$NON-NLS-1$
- }
- this.prompt = prompt;
- }
- /**
- * Creates a new {@code PasswordCallback} instance.
- *
- * @param prompt
- * the message that should be displayed to the user
- * @param echoOn
- * determines whether the user input should be echoed
- */
- public PasswordCallback(String prompt, boolean echoOn) {
- super();
- setPrompt(prompt);
- this.echoOn = echoOn;
- }
- /**
- * Returns the prompt that was specified when creating this {@code
- * PasswordCallback}
- *
- * @return the prompt
- */
- public String getPrompt() {
- return prompt;
- }
- /**
- * Queries whether this {@code PasswordCallback} expects user input to be
- * echoed, which is specified during the creation of the object.
- *
- * @return {@code true} if (and only if) user input should be echoed
- */
- public boolean isEchoOn() {
- return echoOn;
- }
- /**
- * Sets the password. The {@link CallbackHandler} that performs the actual
- * provisioning or input of the password needs to call this method to hand
- * back the password to the security service that requested it.
- *
- * @param password
- * the password. A copy of this is stored, so subsequent changes
- * to the input array do not affect the {@code PasswordCallback}.
- */
- public void setPassword(char[] password) {
- if (password == null) {
- this.inputPassword = password;
- } else {
- inputPassword = new char[password.length];
- System.arraycopy(password, 0, inputPassword, 0, inputPassword.length);
- }
- }
- /**
- * Returns the password. The security service that needs the password
- * usually calls this method once the {@link CallbackHandler} has finished
- * its work.
- *
- * @return the password. A copy of the internal password is created and
- * returned, so subsequent changes to the internal password do not
- * affect the result.
- */
- public char[] getPassword() {
- if (inputPassword != null) {
- char[] tmp = new char[inputPassword.length];
- System.arraycopy(inputPassword, 0, tmp, 0, tmp.length);
- return tmp;
- }
- return null;
- }
- /**
- * Clears the password stored in this {@code PasswordCallback}.
- */
- public void clearPassword() {
- if (inputPassword != null) {
- Arrays.fill(inputPassword, '\u0000');
- }
- }
- }
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