/*
 * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *        * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions and the following disclaimer.
 *        * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *        * Neither the name of Code Aurora nor
 *          the names of its contributors may be used to endorse or promote
 *          products derived from this software without specific prior written
 *          permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.    IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.android.bluetooth.map;

import android.os.Handler;
import android.os.Message;
import android.util.Log;

import javax.obex.*;

/**
 * BluetoothMapAuthenticator is a used by BluetoothObexServer for obex
 * authentication procedure.
 */
public class BluetoothMapAuthenticator implements Authenticator {
    private static final String TAG = "BluetoothMapAuthenticator";

    private boolean mChallenged;

    private boolean mAuthCancelled;

    private String mSessionKey;

    private Handler mCallback;

    public BluetoothMapAuthenticator(final Handler callback) {
        mCallback = callback;
        mChallenged = false;
        mAuthCancelled = false;
        mSessionKey = null;
    }

    public final synchronized void setChallenged(final boolean bool) {
        mChallenged = bool;
    }

    public final synchronized void setCancelled(final boolean bool) {
        mAuthCancelled = bool;
    }

    public final synchronized void setSessionKey(final String string) {
        mSessionKey = string;
    }

    private void waitUserConfirmation() {
        Message msg = Message.obtain(mCallback);
        msg.what = BluetoothMasService.MSG_OBEX_AUTH_CHALL;
        msg.sendToTarget();
        synchronized (this) {
            while (!mChallenged && !mAuthCancelled) {
                try {
                    wait();
                } catch (InterruptedException e) {
                    Log.e(TAG, "Interrupted while waiting on isChalled");
                }
            }
        }
    }

      public PasswordAuthentication onAuthenticationChallenge(final String description,
            final boolean isUserIdRequired, final boolean isFullAccess) {
        waitUserConfirmation();
        if (mSessionKey.trim().length() != 0) {
            PasswordAuthentication pa = new PasswordAuthentication(null, mSessionKey.getBytes());
            return pa;
        }
        return null;
    }

    // TODO: Reserved for future use only, in case PSE challenge PCE
    public byte[] onAuthenticationResponse(final byte[] userName) {
        byte[] b = null;
        return b;
    }
}