1 files changed, 124 insertions, 0 deletions
diff --git a/src/org/apache/harmony/javax/security/auth/callback/PasswordCallback.java b/src/org/apache/harmony/javax/security/auth/callback/PasswordCallback.java
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index 0000000..bd142fc
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+++ b/src/org/apache/harmony/javax/security/auth/callback/PasswordCallback.java
@@ -0,0 +1,124 @@
+/*
+ *  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.harmony.javax.security.auth.callback;
+
+import java.io.Serializable;
+import java.util.Arrays;
+
+
+
+/**
+ * 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("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');
+        }
+    }
+}