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// SPDX-FileCopyrightText: 2021 Daniel Vrátil <dvratil@kde.org>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
#include "otpprovider.h"
#include <QUrl>
#include <QUrlQuery>
#include <QDebug>
#include <QDateTime>
#include <KLocalizedString>
#include <chrono>
#include <liboath/oath.h>
using namespace PlasmaPass;
using namespace std::chrono_literals;
namespace {
static const QString otpAuthSchema = QStringLiteral("otpauth://");
static const QString secretQueryItem = QStringLiteral("secret");
QString parseOtpType(const QUrl &url)
{
return url.host();
}
} // namespace
OTPProvider::OTPProvider(const QString &path, QObject *parent)
: ProviderBase(path, parent)
{
setSecretTimeout(30s);
}
ProviderBase::HandlingResult OTPProvider::handleSecret(QStringView secret)
{
if (!secret.startsWith(otpAuthSchema)) {
return HandlingResult::Continue;
}
QUrl url(secret.toString());
const auto otpType = parseOtpType(url);
if (otpType == QLatin1String("totp")) {
handleTOTP(url);
} else {
setError(i18n("Unsupported OTP type %1", otpType));
return HandlingResult::Stop;
}
return HandlingResult::Stop;
}
void OTPProvider::handleTOTP(const QUrl &url)
{
const QUrlQuery query(url.query());
const auto secret = query.queryItemValue(secretQueryItem).toUtf8();
char *decodedSecret = {};
size_t decodedSecretLen = 0;
oath_base32_decode(secret.data(), secret.size(), &decodedSecret, &decodedSecretLen);
char output_otp[6] = {};
oath_totp_generate(decodedSecret, decodedSecretLen,
QDateTime::currentDateTime().toSecsSinceEpoch(),
OATH_TOTP_DEFAULT_TIME_STEP_SIZE,
OATH_TOTP_DEFAULT_START_TIME,
6,
output_otp);
setSecret(QString::fromLatin1(output_otp, sizeof(output_otp)));
}
#include "moc_otpprovider.cpp"
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