QRCodeProtocol.cpp

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/*
 * QRCodeProtocol.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/QRCodeProtocol.h"
#include "security/exchange/KeyExchangeEvent.h"
#include "security/SecurityKeyManager.h"
#include "core/BundleCore.h"

namespace dtn
{
        namespace security
        {
                QRCodeProtocol::QRCodeProtocol(KeyExchangeManager &manager)
                 : KeyExchangeProtocol(manager, 4)
                {
                }

                QRCodeProtocol::~QRCodeProtocol()
                {
                }

                void QRCodeProtocol::begin(KeyExchangeSession &session, KeyExchangeData &data)
                {
                        // get existing security key
                        SecurityKey key = SecurityKeyManager::getInstance().get(session.getPeer(), SecurityKey::KEY_PUBLIC);

                        // get key fingerprint
                        const std::string fingerprint = key.getFingerprint();

                        // prepare a response
                        KeyExchangeData response(KeyExchangeData::COMPLETE, session);

                        if (fingerprint == data.str())
                        {
                                // store existing key with HIGH trust level
                                session.putKey(key.getData(), key.type, SecurityKey::HIGH);

                                // finish the key-exchange
                                manager.finish(session);
                        }
                        else
                        {
                                // signal error
                                throw ibrcommon::Exception("fingerprint is missing");
                        }
                }

                void QRCodeProtocol::step(KeyExchangeSession &session, KeyExchangeData &data)
                {
                        throw ibrcommon::Exception("invalid step");
                }
        } /* namespace security */
} /* namespace dtn */