108 lines
3.0 KiB
C++
108 lines
3.0 KiB
C++
/*
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* Copyright (C) 2016 Felix Geyer <debfx@fobos.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 or (at your option)
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* version 3 of the License.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "KeePass2Repair.h"
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#include <QBuffer>
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#include <QRegExp>
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#include "format/KeePass2RandomStream.h"
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#include "format/KeePass2Reader.h"
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#include "format/KeePass2XmlReader.h"
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KeePass2Repair::KeePass2Repair()
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: m_db(Q_NULLPTR)
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{
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}
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KeePass2Repair::RepairResult KeePass2Repair::repairDatabase(QIODevice* device, const CompositeKey& key)
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{
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m_db = Q_NULLPTR;
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m_errorStr.clear();
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KeePass2Reader reader;
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reader.setSaveXml(true);
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Database* db = reader.readDatabase(device, key, true);
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if (!reader.hasError()) {
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delete db;
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return NothingTodo;
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}
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QByteArray xmlData = reader.xmlData();
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if (!db || xmlData.isEmpty()) {
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delete db;
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m_errorStr = reader.errorString();
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return UnableToOpen;
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}
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bool repairAction = false;
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QString xmlStart = QString::fromLatin1(xmlData.constData(), qMin(100, xmlData.size()));
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QRegExp encodingRegExp("encoding=\"([^\"]+)\"", Qt::CaseInsensitive, QRegExp::RegExp2);
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if (encodingRegExp.indexIn(xmlStart) != -1) {
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if (encodingRegExp.cap(1).compare("utf-8", Qt::CaseInsensitive) != 0
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&& encodingRegExp.cap(1).compare("utf8", Qt::CaseInsensitive) != 0)
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{
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// database is not utf-8 encoded, we don't support repairing that
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delete db;
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return RepairFailed;
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}
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}
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// try to fix broken databases because of bug #392
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for (int i = (xmlData.size() - 1); i >= 0; i--) {
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char ch = xmlData.at(i);
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if (ch < 0x20 && ch != 0x09 && ch != 0x0A && ch != 0x0D) {
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xmlData.remove(i, 1);
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repairAction = true;
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}
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}
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if (!repairAction) {
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// we were unable to find the problem
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delete db;
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return RepairFailed;
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}
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KeePass2RandomStream randomStream;
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randomStream.init(reader.streamKey());
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KeePass2XmlReader xmlReader;
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QBuffer buffer(&xmlData);
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buffer.open(QIODevice::ReadOnly);
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xmlReader.readDatabase(&buffer, db, &randomStream);
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if (xmlReader.hasError()) {
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delete db;
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return RepairFailed;
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}
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else {
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m_db = db;
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return RepairSuccess;
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}
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}
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Database* KeePass2Repair::database() const
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{
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return m_db;
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}
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QString KeePass2Repair::errorString() const
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{
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return m_errorStr;
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}
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