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completely refactor the serialization of AppTicketGC

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+ avoid any magical numbers as much as possible & calculate the required size via sizeof()

+ use a macro to serialize a single field & increment the pointer at the same time

+ added some more debug statements
This commit is contained in:
a 2023-12-22 09:33:37 +02:00 committed by otavepto
parent 342d0a27b5
commit e379220e16
1 changed files with 63 additions and 15 deletions
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78
dll/auth.h
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@ -71,22 +71,70 @@ private:
public:
std::vector<uint8_t> Serialize()
{
const uint64_t steam_id = id.ConvertToUint64();
// must be 52
constexpr size_t total_size =
sizeof(STEAM_APPTICKET_GCLen) +
sizeof(GCToken) +
sizeof(steam_id) +
sizeof(ticketGenDate) +
sizeof(STEAM_APPTICKET_SESSIONLEN) +
sizeof(one) +
sizeof(two) +
sizeof(ExternalIP) +
sizeof(InternalIP) +
sizeof(TimeSinceStartup) +
sizeof(TicketGeneratedCount);
// check the size at compile time, we must ensure the correct size
#ifndef EMU_RELEASE_BUILD
static_assert(
total_size == 52,
"AUTH::AppTicketGC::SER calculated size of serialized data != 52 bytes, your compiler has some incorrect sizes"
);
#endif
PRINT_DEBUG(
"AUTH::AppTicketGC::SER Token:\n"
" GCToken: %I64u\n"
" user steam_id: %I64u\n"
" ticketGenDate: %u\n"
" ExternalIP: 0x%08X, InternalIP: 0x%08X\n"
" TimeSinceStartup: %u, TicketGeneratedCount: %u\n"
" SER size = %zu\n",
GCToken,
steam_id,
ticketGenDate,
ExternalIP, InternalIP,
TimeSinceStartup, TicketGeneratedCount,
total_size
);
std::vector<uint8_t> buffer;
uint8_t* pBuffer;
buffer.resize(52);
pBuffer = buffer.data();
PRINT_DEBUG("AppTicketGC: Token: %I64u Startup: %u count: %u", GCToken, TimeSinceStartup, TicketGeneratedCount);
*reinterpret_cast<uint32_t*>(pBuffer) = STEAM_APPTICKET_GCLen; pBuffer += 4;
*reinterpret_cast<uint64_t*>(pBuffer) = GCToken; pBuffer += 8;
*reinterpret_cast<uint64_t*>(pBuffer) = id.ConvertToUint64(); pBuffer += 8;
*reinterpret_cast<uint32_t*>(pBuffer) = ticketGenDate; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = STEAM_APPTICKET_SESSIONLEN; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = one; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = two; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = ExternalIP; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = InternalIP; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = TimeSinceStartup; pBuffer += 4;
*reinterpret_cast<uint32_t*>(pBuffer) = TicketGeneratedCount; pBuffer += 4;
buffer.resize(total_size);
uint8_t* pBuffer = buffer.data();
#define SER_VAR(v) \
*reinterpret_cast<std::remove_const<decltype(v)>::type *>(pBuffer) = v; \
pBuffer += sizeof(v)
SER_VAR(STEAM_APPTICKET_GCLen);
SER_VAR(GCToken);
SER_VAR(steam_id);
SER_VAR(ticketGenDate);
SER_VAR(STEAM_APPTICKET_SESSIONLEN);
SER_VAR(one);
SER_VAR(two);
SER_VAR(ExternalIP);
SER_VAR(InternalIP);
SER_VAR(TimeSinceStartup);
SER_VAR(TicketGeneratedCount);
#undef SER_VAR
#ifndef EMU_RELEASE_BUILD
// we nedd a live object until the printf does its job, hence this special handling
auto str = uint8_vector_to_hex_string(buffer);