NoneProtocol.cpp

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/*
 * NoneProtocol.cpp
 *
 * 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.
 *
 */

#include "security/exchange/NoneProtocol.h"
#include "security/SecurityKeyManager.h"
#include "core/BundleCore.h"

namespace dtn
{
        namespace security
        {
                NoneProtocol::NoneProtocol(KeyExchangeManager &manager)
                 : KeyExchangeProtocol(manager, 0)
                {
                }

                NoneProtocol::~NoneProtocol()
                {
                }

                void NoneProtocol::begin(KeyExchangeSession &session, KeyExchangeData &data)
                {
                        // prepare request
                        KeyExchangeData request(KeyExchangeData::REQUEST, session);

                        // get local public key
                        const SecurityKey pkey = SecurityKeyManager::getInstance().get(dtn::core::BundleCore::local, SecurityKey::KEY_PUBLIC);

                        // set request parameters
                        request.str(pkey.getData());

                        // send request to the other peer
                        manager.submit(session, request);
                }

                void NoneProtocol::step(KeyExchangeSession &session, KeyExchangeData &data)
                {
                        if (data.getAction() == KeyExchangeData::REQUEST)
                        {
                                // write key in tmp file
                                session.putKey(data.str(), SecurityKey::KEY_PUBLIC, SecurityKey::LOW);

                                // prepare response
                                KeyExchangeData response(KeyExchangeData::RESPONSE, session);

                                // get local public key
                                const SecurityKey pkey = SecurityKeyManager::getInstance().get(dtn::core::BundleCore::local, SecurityKey::KEY_PUBLIC);

                                // reply with the own key
                                response.str(pkey.getData());

                                // send bundle to peer
                                manager.submit(session, response);

                                // finish the key-exchange
                                manager.finish(session);
                        }
                        else if (data.getAction() == KeyExchangeData::RESPONSE)
                        {
                                // write key to session
                                session.putKey(data.str(), SecurityKey::KEY_PUBLIC, SecurityKey::LOW);

                                // finish the key-exchange
                                manager.finish(session);
                        }
                }
        } /* namespace security */
} /* namespace dtn */