kerby-kerb/kerb-core-test/src/test/java/org/apache/kerby/kerberos/kerb/codec/spnego/SpnegoToken.java

/**
 *  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.kerby.kerberos.kerb.codec.spnego;

import java.io.IOException;

public abstract class SpnegoToken {

    // Default max size as 65K
    public static int TOKEN_MAX_SIZE = 66560;

    protected byte[] mechanismToken;
    protected byte[] mechanismList;
    protected String mechanism;

    public static SpnegoToken parse(byte[] token) throws IOException {
        SpnegoToken spnegoToken = null;

        if (token.length <= 0) {
            throw new IOException("spnego.token.empty");
        }

        switch (token[0]) {
        case (byte)0x60:
            spnegoToken = new SpnegoInitToken(token);
            break;
        case (byte)0xa1:
            spnegoToken = new SpnegoTargToken(token);
            break;
        default:
            spnegoToken = null;
            throw new IOException("spnego.token.invalid");
        }

        return spnegoToken;
    }

    public byte[] getMechanismToken() {
        return mechanismToken;
    }

    public byte[] getMechanismList() {
        return mechanismList;
    }

    public String getMechanism() {
        return mechanism;
    }

}