133 lines
4.8 KiB
C++
133 lines
4.8 KiB
C++
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* *
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* Copyright (C) 2018 Simon Stürz <simon.stuerz@guh.io> *
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* *
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* This file is part of guh. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Lesser General Public *
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* License as published by the Free Software Foundation; either *
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* version 2.1 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this library; If not, see *
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* <http://www.gnu.org/licenses/>. *
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* *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#ifndef NUKIAUTHENTICATOR_H
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#define NUKIAUTHENTICATOR_H
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#include <QObject>
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#include <QByteArray>
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#include <QBluetoothHostInfo>
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#include "nukiutils.h"
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#include "bluez/bluetoothgattcharacteristic.h"
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class NukiAuthenticator : public QObject
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{
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Q_OBJECT
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public:
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enum AuthenticationState {
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AuthenticationStateUnauthenticated,
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AuthenticationStateAuthenticated,
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AuthenticationStateRequestPublicKey,
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AuthenticationStateGenerateKeyPair,
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AuthenticationStateSendPublicKey,
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AuthenticationStateReadChallenge,
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AuthenticationStateAutorization,
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AuthenticationStateReadSecondChallenge,
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AuthenticationStateAuthenticateData,
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AuthenticationStateAuthorizationId,
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AuthenticationStateAuthorizationIdConfirm,
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AuthenticationStateStatus,
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AuthenticationStateError
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};
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Q_ENUM(AuthenticationState)
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explicit NukiAuthenticator(const QBluetoothHostInfo &hostInfo, BluetoothGattCharacteristic *pairingCharacteristic, QObject *parent = nullptr);
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NukiUtils::ErrorCode error() const;
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AuthenticationState state() const;
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// Returns true if authentication end encryption data are available
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bool isValid() const;
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void clearSettings();
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void startAuthenticationProcess();
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quint32 authorizationId() const;
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QByteArray authorizationIdRawData() const;
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QByteArray encryptData(const QByteArray &data, const QByteArray &nonce);
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QByteArray decryptData(const QByteArray &data, const QByteArray &nonce);
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// Generate 32 byte nonce data
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QByteArray generateNonce(const int &length = 32) const;
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private:
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QBluetoothHostInfo m_hostInfo;
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BluetoothGattCharacteristic *m_pairingCharacteristic = nullptr;
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AuthenticationState m_state = AuthenticationStateUnauthenticated;
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NukiUtils::ErrorCode m_error = NukiUtils::ErrorCodeNoError;
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// For handling splited notifications
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NukiUtils::Command m_currentReceivingCommand = NukiUtils::CommandRequestData;
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QByteArray m_currentReceivingData;
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int m_currentReceivingExpectedCount = 0;
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int m_currentReceivingCurrentCount = 0;
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// For development debugging
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bool m_debug = false;
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// Local data
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QByteArray m_privateKey;
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QByteArray m_publicKey;
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QByteArray m_sharedKey;
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QByteArray m_authenticator;
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QByteArray m_nonce;
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QByteArray m_uuid;
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QByteArray m_authorizationIdRawData;
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quint32 m_authorizationId = 0;
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// Nuki data
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QByteArray m_publicKeyNuki;
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QByteArray m_nonceNuki;
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// State machine
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void setState(AuthenticationState state);
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void resetExpectedData(NukiUtils::Command command = NukiUtils::CommandRequestData, int expectedCount = 1);
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// Helper methods
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bool createAuthenticator(const QByteArray content);
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// State action methods
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void requestPublicKey();
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void sendPublicKey();
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void generateKeyPair();
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void sendAuthorizationAuthenticator();
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void sendAuthenticateData();
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void sendAuthoizationIdConfirm();
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// Storage
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void saveData();
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void loadData();
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signals:
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void errorOccured(NukiUtils::ErrorCode error);
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void stateChanged(AuthenticationState state);
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void authenticationProcessFinished(bool success);
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private slots:
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void onPairingDataCharacteristicChanged(const QByteArray &value);
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};
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#endif // NUKIAUTHENTICATOR_H
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