org.rzo.netty.ahessian.auth.SimpleAuthToken.java Source code

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Here is the source code for org.rzo.netty.ahessian.auth.SimpleAuthToken.java

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/*******************************************************************************
 * Copyright  2015 rzorzorzo@users.sf.net
 *
 * 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.rzo.netty.ahessian.auth;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.util.Arrays;

/**
 * A Simple Authentication Token. The password is sent unencrypted.
 */
public class SimpleAuthToken implements AuthToken {

    /** The _password. */
    byte[] _password;

    /** The _received bytes. */
    byte[] _receivedBytes;

    /** The _received length. */
    int _receivedLength = 0;

    boolean _loggedOn = false;

    int _length = -1;

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(SimpleAuthToken.class);

    /**
     * Sets the password.
     * 
     * @param password
     *            the new password
     */
    public void setPassword(String password) {
        _password = ensureLength(password.getBytes());
        _receivedBytes = new byte[_password.length];
    }

    public void setLength(int length) {
        _length = length;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.rzo.netty.ahessian.auth.AuthToken#authenticate(org.jboss.netty.channel
     * .ChannelHandlerContext, org.jboss.netty.channel.MessageEvent)
     */
    public int authenticate(ChannelHandlerContext ctx, ByteBuf e) {
        ByteBuf b = e;
        int toCopy = Math.min(_receivedBytes.length - _receivedLength, b.readableBytes());
        byte[] bytes = new byte[toCopy];
        b.readBytes(bytes);
        System.arraycopy(bytes, 0, _receivedBytes, _receivedLength, bytes.length);
        _receivedLength += toCopy;
        if (_receivedLength == _password.length) {
            if (Arrays.equals(_receivedBytes, _password)) {
                logger.info("authenticated");
                if (b.readableBytes() != 0)
                    ctx.fireChannelRead(e);
                return PASSED;
            } else
                return FAILED;
        } else
            return NOT_COMPLETE;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.rzo.netty.ahessian.auth.AuthToken#sendPassword(org.jboss.netty.channel
     * .ChannelHandlerContext)
     */
    public void sendPassword(ChannelHandlerContext ctx) {
        ctx.write(Unpooled.wrappedBuffer(_password));
    }

    public boolean isLoggedOn() {
        return _loggedOn;
    }

    void setLoggedOn(boolean loggedOn) {
        _loggedOn = loggedOn;
    }

    public void disconnected() {
        setLoggedOn(false);
    }

    byte[] ensureLength(byte[] bytes) {
        if (bytes.length == _length || _length <= 0)
            return bytes;
        else {
            return Arrays.copyOf(bytes, _length);
        }
    }

    byte[] getPassword() {
        return _password;
    }

}