/*
 * 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.
 */

#ifndef _HDFS_LIBHDFS3_RPC_SASLCLIENT_H_
#define _HDFS_LIBHDFS3_RPC_SASLCLIENT_H_

#include <gsasl.h>

#include "libyarncommon/Token.h"
#include "network/Socket.h"
#include "RpcAuth.h"
#include "YARNRpcHeader.pb.h"

namespace Yarn {
namespace Internal {

#define SWITCH_TO_SIMPLE_AUTH -88

class SaslClient {
public:
    SaslClient(const hadoop::common::RpcSaslProto_SaslAuth & auth, const Token & token,
               const std::string & principal);

    ~SaslClient();

    std::string evaluateChallenge(const std::string & chanllege);

    bool isComplete();

private:
    void initKerberos(const hadoop::common::RpcSaslProto_SaslAuth & auth,
                      const std::string & principal);
    void initDigestMd5(const hadoop::common::RpcSaslProto_SaslAuth & auth, const Token & token);

private:
    Gsasl * ctx;
    Gsasl_session * session;
    bool complete;
};

}
}

#endif /* _HDFS_LIBHDFS3_RPC_SASLCLIENT_H_ */