HashProtocol.h

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/*
 * HashProtocol.h
 *
 * Copyright (C) 2014 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *             Thomas Schrader <schrader.thomas@gmail.com>
 *
 * 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.
 *
 */

#ifndef HASHPROTOCOL_H_
#define HASHPROTOCOL_H_

#include "security/exchange/KeyExchangeProtocol.h"
#include "security/exchange/KeyExchangeSession.h"

namespace dtn
{
        namespace security
        {
                class HashProtocol : public dtn::security::KeyExchangeProtocol
                {
                public:
                        HashProtocol(KeyExchangeManager &manager);
                        virtual ~HashProtocol();

                        virtual KeyExchangeSession* createSession(const dtn::data::EID &peer, unsigned int uniqueId);

                        virtual void begin(KeyExchangeSession &session, KeyExchangeData &data);
                        virtual void step(KeyExchangeSession &session, KeyExchangeData &data);

                private:
                        class HashState : public dtn::security::KeyExchangeSession::SessionState
                        {
                        public:
                                virtual ~HashState();
                                std::vector<char> random;
                                std::vector<char> commitment;
                        };

                        static void sha256(std::ostream &stream, const std::string &str);
                };
        } /* namespace security */
} /* namespace dtn */

#endif /* HASHPROTOCOL_H_ */