keepassxc

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/*
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 *  Copyright (C) 2017 KeePassXC Team <team@keepassxc.org>
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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 "format/KeePass2Reader.h"
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#include "format/Kdbx3Reader.h"
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#include "format/Kdbx4Reader.h"
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#include "format/KeePass1.h"
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#include "keys/CompositeKey.h"
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#include <QFile>
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/**
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 * Read database from file and detect correct file format.
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 *
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 * @param filename input file
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 * @param key database encryption composite key
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 * @param db Database to read into
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 * @return true on success
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 */
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bool KeePass2Reader::readDatabase(const QString& filename, QSharedPointer<const CompositeKey> key, Database* db)
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{
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    QFile file(filename);
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    if (!file.open(QFile::ReadOnly)) {
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        raiseError(file.errorString());
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        return false;
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    }
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    bool ok = readDatabase(&file, std::move(key), db);
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    if (file.error() != QFile::NoError) {
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        raiseError(file.errorString());
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        return false;
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    }
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    return ok;
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}
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/**
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 * Read database from device and detect correct file format.
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 *
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 * @param device input device
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 * @param key database encryption composite key
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 * @param db Database to read into
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 * @return true on success
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 */
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bool KeePass2Reader::readDatabase(QIODevice* device, QSharedPointer<const CompositeKey> key, Database* db)
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{
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    m_error = false;
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    m_errorStr.clear();
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    quint32 signature1, signature2;
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    bool ok = KdbxReader::readMagicNumbers(device, signature1, signature2, m_version);
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    if (!ok) {
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        raiseError(tr("Failed to read database file."));
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        return false;
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    }
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    if (signature1 == KeePass1::SIGNATURE_1 && signature2 == KeePass1::SIGNATURE_2) {
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        raiseError(tr("The selected file is an old KeePass 1 database (.kdb).\n\n"
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                      "You can import it by clicking on Database > 'Import KeePass 1 database…'.\n"
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                      "This is a one-way migration. You won't be able to open the imported "
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                      "database with the old KeePassX 0.4 version."));
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        return false;
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    } else if (!(signature1 == KeePass2::SIGNATURE_1 && signature2 == KeePass2::SIGNATURE_2)) {
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        raiseError(tr("Not a KeePass database."));
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        return false;
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    }
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    if (m_version < KeePass2::FILE_VERSION_MIN
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        || (m_version & KeePass2::FILE_VERSION_CRITICAL_MASK) > KeePass2::FILE_VERSION_MAX) {
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        raiseError(tr("Unsupported KeePass 2 database version."));
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        return false;
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    }
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    // determine file format (KDBX 2/3 or 4)
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    if (m_version < KeePass2::FILE_VERSION_4) {
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        m_reader.reset(new Kdbx3Reader());
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    } else {
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        m_reader.reset(new Kdbx4Reader());
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    }
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    return m_reader->readDatabase(device, std::move(key), db);
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}
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bool KeePass2Reader::hasError() const
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{
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    return m_error || (!m_reader.isNull() && m_reader->hasError());
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}
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QString KeePass2Reader::errorString() const
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{
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    return !m_reader.isNull() ? m_reader->errorString() : m_errorStr;
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}
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/**
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 * @return detected KDBX version
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 */
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quint32 KeePass2Reader::version() const
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{
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    return m_version;
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}
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/**
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 * @return KDBX reader used for reading the input file
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 */
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QSharedPointer<KdbxReader> KeePass2Reader::reader() const
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{
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    return m_reader;
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}
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/**
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 * Raise an error. Use in case of an unexpected read error.
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 *
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 * @param errorMessage error message
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 */
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void KeePass2Reader::raiseError(const QString& errorMessage)
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{
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    m_error = true;
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    m_errorStr = errorMessage;
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}
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