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astra/launcher/src/encryptedarg.cpp

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2.2 KiB
C++

// SPDX-FileCopyrightText: 2023 Joshua Goins <josh@redstrate.com>
// SPDX-License-Identifier: GPL-3.0-or-later
#include "encryptedarg.h"
#include <physis.hpp>
#if defined(Q_OS_MAC)
#include <mach/mach_time.h>
#include <sys/sysctl.h>
#endif
#if defined(Q_OS_WIN)
#include <windows.h>
#endif
#if defined(Q_OS_MAC)
// taken from XIV-on-Mac, apparently Wine changed this?
uint32_t TickCount()
{
struct mach_timebase_info timebase;
mach_timebase_info(&timebase);
auto machtime = mach_continuous_time();
auto numer = uint64_t(timebase.numer);
auto denom = uint64_t(timebase.denom);
auto monotonic_time = machtime * numer / denom / 100;
return monotonic_time / 10000;
}
#endif
#if defined(Q_OS_LINUX)
uint32_t TickCount()
{
struct timespec ts {
};
clock_gettime(CLOCK_MONOTONIC, &ts);
return (ts.tv_sec * 1000 + ts.tv_nsec / 1000000);
}
#endif
#if defined(Q_OS_WIN)
uint32_t TickCount()
{
return GetTickCount();
}
#endif
// from xivdev
static char ChecksumTable[] = {'f', 'X', '1', 'p', 'G', 't', 'd', 'S', '5', 'C', 'A', 'P', '4', '_', 'V', 'L'};
inline char GetChecksum(const unsigned int key)
{
auto value = key & 0x000F0000;
return ChecksumTable[value >> 16];
}
QString encryptGameArg(const QString &arg)
{
const uint32_t rawTicks = TickCount();
const uint32_t ticks = rawTicks & 0xFFFFFFFFu;
const uint32_t key = ticks & 0xFFFF0000u;
char buffer[9]{};
sprintf(buffer, "%08x", key);
Blowfish const *blowfish = physis_blowfish_initialize(reinterpret_cast<uint8_t *>(buffer), 9);
uint8_t *out_data = nullptr;
uint32_t out_size = 0;
QByteArray toEncrypt = (QString(" /T =%1").arg(ticks) + arg).toUtf8();
physis_blowfish_encrypt(blowfish, reinterpret_cast<uint8_t *>(toEncrypt.data()), toEncrypt.size(), &out_data, &out_size);
const QByteArray encryptedArg = QByteArray::fromRawData(reinterpret_cast<const char *>(out_data), static_cast<int>(out_size));
const QString base64 = encryptedArg.toBase64(QByteArray::Base64Option::Base64UrlEncoding | QByteArray::Base64Option::KeepTrailingEquals);
const char checksum = GetChecksum(key);
return QString("//**sqex0003%1%2**//").arg(base64, QString(checksum));
}