keepassxc

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/*
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 *  Copyright (C) 2019 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 "PasswordKey.h"
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#include "crypto/CryptoHash.h"
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#include <QDataStream>
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#include <QSharedPointer>
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QUuid PasswordKey::UUID("77e90411-303a-43f2-b773-853b05635ead");
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constexpr int PasswordKey::SHA256_SIZE;
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PasswordKey::PasswordKey()
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    : Key(UUID)
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    , m_key(SHA256_SIZE)
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{
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}
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PasswordKey::PasswordKey(const QString& password)
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    : Key(UUID)
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    , m_key(SHA256_SIZE)
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{
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    setPassword(password);
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}
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QByteArray PasswordKey::rawKey() const
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{
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    if (!m_isInitialized) {
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        return {};
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    }
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    return {m_key.data(), int(m_key.size())};
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}
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void PasswordKey::setRawKey(const QByteArray& data)
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{
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    if (data.isEmpty()) {
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        m_key.clear();
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        m_isInitialized = false;
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    } else {
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        Q_ASSERT(data.size() == SHA256_SIZE);
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        m_key.assign(data.begin(), data.end());
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        m_isInitialized = true;
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    }
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}
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void PasswordKey::setPassword(const QString& password)
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{
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    setRawKey(CryptoHash::hash(password.toUtf8(), CryptoHash::Sha256));
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}
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QSharedPointer<PasswordKey> PasswordKey::fromRawKey(const QByteArray& rawKey)
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{
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    auto result = QSharedPointer<PasswordKey>::create();
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    result->setRawKey(rawKey);
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    return result;
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}
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QByteArray PasswordKey::serialize() const
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{
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    QByteArray data;
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    QDataStream stream(&data, QIODevice::WriteOnly);
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    stream << uuid().toRfc4122() << rawKey();
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    return data;
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}
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void PasswordKey::deserialize(const QByteArray& data)
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{
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    QByteArray uuidData, key;
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    QDataStream stream(data);
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    stream >> uuidData >> key;
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    if (uuid().toRfc4122() == uuidData) {
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        setRawKey(key);
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    }
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}
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