300 lines
9.9 KiB
C++
300 lines
9.9 KiB
C++
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struct AppTicketV1
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{
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// Total ticket size - 16
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uint32_t TicketSize;
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uint32_t TicketVersion;
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uint32_t Unk2;
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std::vector<uint8_t> UserData;
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void Reset()
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{
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TicketSize = 0;
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TicketVersion = 0;
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Unk2 = 0;
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UserData.clear();
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}
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std::vector<uint8_t> Serialize()
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{
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std::vector<uint8_t> buffer;
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uint8_t* pBuffer;
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buffer.resize(16 + UserData.size());
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pBuffer = buffer.data();
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketSize; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketVersion; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = UserData.size(); pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = Unk2; pBuffer += 4;
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memcpy(pBuffer, UserData.data(), UserData.size());
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return buffer;
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}
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bool Deserialize(const uint8_t* pBuffer, size_t size)
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{
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if (size < 16)
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return false;
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uint32_t user_data_size;
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TicketSize = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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TicketVersion = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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user_data_size = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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if (size < (user_data_size + 16))
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return false;
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Unk2 = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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UserData.resize(user_data_size);
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memcpy(UserData.data(), pBuffer, user_data_size);
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return true;
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}
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//inline uint32_t TicketSize() { return *reinterpret_cast<uint32_t*>(_Buffer); }
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//inline uint32_t TicketVersion(){ return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 4); }
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//inline uint32_t UserDataSize() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 8); }
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//inline uint32_t Unk2() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 12); }
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//inline uint8_t* UserData() { return reinterpret_cast<uint8_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 16); }
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};
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struct AppTicketV2
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{
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// Totals ticket size - 16 - TicketV1::UserData.size()
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uint32_t TicketSize;
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uint32_t TicketVersion;
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uint64_t SteamID;
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uint32_t AppID;
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uint32_t Unk1;
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uint32_t Unk2;
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uint32_t TicketFlags;
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uint32_t TicketIssueTime;
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uint32_t TicketValidityEnd;
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static constexpr uint32_t LicenseBorrowed = 0x00000002; // Bit 1: IsLicenseBorrowed
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static constexpr uint32_t LicenseTemporary = 0x00000004; // Bit 2: IsLicenseTemporary
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void Reset()
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{
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TicketSize = 0;
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TicketVersion = 0;
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SteamID = 0;
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AppID = 0;
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Unk1 = 0;
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Unk2 = 0;
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TicketFlags = 0;
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TicketIssueTime = 0;
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TicketValidityEnd = 0;
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}
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std::vector<uint8_t> Serialize()
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{
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std::vector<uint8_t> buffer;
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uint8_t* pBuffer;
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buffer.resize(40);
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pBuffer = buffer.data();
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketSize; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketVersion; pBuffer += 4;
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*reinterpret_cast<uint64_t*>(pBuffer) = SteamID; pBuffer += 8;
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*reinterpret_cast<uint32_t*>(pBuffer) = AppID; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = Unk1; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = Unk2; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketFlags; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketIssueTime; pBuffer += 4;
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*reinterpret_cast<uint32_t*>(pBuffer) = TicketValidityEnd;
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return buffer;
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}
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bool Deserialize(const uint8_t* pBuffer, size_t size)
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{
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if (size < 40)
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return false;
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TicketSize = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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TicketVersion = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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SteamID = *reinterpret_cast<const uint64_t*>(pBuffer); pBuffer += 8;
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AppID = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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Unk1 = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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Unk2 = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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TicketFlags = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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TicketIssueTime = *reinterpret_cast<const uint32_t*>(pBuffer); pBuffer += 4;
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TicketValidityEnd = *reinterpret_cast<const uint32_t*>(pBuffer);
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return true;
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}
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//inline uint32_t TicketSize() { return *reinterpret_cast<uint32_t*>(_Buffer); }
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//inline uint32_t TicketVersion() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 4); }
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//inline uint64_t SteamID() { return *reinterpret_cast<uint64_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 8); };
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//inline uint32_t AppID() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 16); }
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//inline uint32_t Unk1() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 20); }
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//inline uint32_t Unk2() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 24); }
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//inline uint32_t TicketFlags() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 28); }
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//inline uint32_t TicketIssueTime() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 32); }
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//inline uint32_t TicketValidityEnd() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 36); }
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};
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struct AppTicketV4
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{
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std::vector<uint32_t> AppIDs;
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bool HasVACStatus = false;
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uint32_t VACStatus;
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bool HasAppValue = false;
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uint32_t AppValue;
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void Reset()
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{
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AppIDs.clear();
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HasVACStatus = false;
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HasAppValue = false;
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}
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std::vector<uint8_t> Serialize()
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{
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std::vector<uint32_t> appids = AppIDs;
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if (appids.size() == 0)
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{
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appids.emplace_back(0);
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}
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uint16_t appid_count = static_cast<uint16_t>(appids.size() > 140 ? 140 : appids.size());
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size_t buffer_size = static_cast<uint32_t>(appid_count) * 4ul + 2ul;
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std::vector<uint8_t> buffer;
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uint8_t* pBuffer;
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if (HasAppValue)
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{// VACStatus + AppValue
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buffer_size += 4;
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if (!HasVACStatus)
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{
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HasVACStatus = true;
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VACStatus = 0;
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}
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}
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if (HasVACStatus)
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{// VACStatus only
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buffer_size += 4;
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}
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buffer.resize(buffer_size);
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pBuffer = buffer.data();
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*reinterpret_cast<uint16_t*>(pBuffer) = appid_count;
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pBuffer += 2;
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for (int i = 0; i < appid_count && i < 140; ++i)
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{
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*reinterpret_cast<uint32_t*>(pBuffer) = appids[i];
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pBuffer += 4;
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}
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if (HasVACStatus)
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{
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*reinterpret_cast<uint32_t*>(pBuffer) = VACStatus;
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pBuffer += 4;
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}
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if (HasAppValue)
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{
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*reinterpret_cast<uint32_t*>(pBuffer) = AppValue;
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}
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return buffer;
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}
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bool Deserialize(const uint8_t* pBuffer, size_t size)
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{
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if (size < 2)
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return false;
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uint16_t appid_count = *reinterpret_cast<const uint16_t*>(pBuffer);
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if (size < (appid_count * 4 + 2) || appid_count >= 140)
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return false;
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AppIDs.resize(appid_count);
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pBuffer += 2;
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size -= 2;
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for (int i = 0; i < appid_count; ++i)
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{
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AppIDs[i] = *reinterpret_cast<const uint32_t*>(pBuffer);
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pBuffer += 4;
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size -= 4;
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}
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HasVACStatus = false;
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HasAppValue = false;
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if (size < 4)
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return true;
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HasVACStatus = true;
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VACStatus = *reinterpret_cast<const uint32_t*>(pBuffer);
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pBuffer += 4;
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size -= 4;
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if (size < 4)
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return true;
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HasAppValue = true;
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AppValue = *reinterpret_cast<const uint32_t*>(pBuffer);
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return true;
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}
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// Often 1 with empty appid
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//inline uint16_t AppIDCount() { return *reinterpret_cast<uint16_t*>(_Buffer); }
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//inline uint32_t* AppIDs() { return reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 2); }
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// Optional
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//inline uint32_t VACStatus() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 2 + AppIDCount() * 4); }
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// Optional
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//inline uint32_t AppValue() { return *reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(_Buffer) + 2 + AppIDCount() * 4 + 4); }
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};
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class DecryptedAppTicket
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{
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public:
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AppTicketV1 TicketV1;
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AppTicketV2 TicketV2;
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AppTicketV4 TicketV4;
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bool DeserializeTicket(const uint8_t* pBuffer, size_t buf_size)
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{
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if (!TicketV1.Deserialize(pBuffer, buf_size))
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return false;
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pBuffer += 16 + TicketV1.UserData.size();
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buf_size -= 16 + TicketV1.UserData.size();
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if (!TicketV2.Deserialize(pBuffer, buf_size))
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return false;
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if (TicketV2.TicketVersion > 2)
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{
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pBuffer += 40;
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buf_size -= 40;
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if (!TicketV4.Deserialize(pBuffer, buf_size))
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return false;
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}
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return true;
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}
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std::vector<uint8_t> SerializeTicket()
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{
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std::vector<uint8_t> buffer;
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TicketV1.TicketSize = TicketV1.UserData.size() + 40 + 2 + ((TicketV4.AppIDs.size() == 0 ? 1 : TicketV4.AppIDs.size()) * 4) + (TicketV4.HasVACStatus ? 4 : 0) + (TicketV4.HasAppValue ? 4 : 0);
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TicketV2.TicketSize = TicketV1.TicketSize - TicketV1.UserData.size();
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buffer = TicketV1.Serialize();
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auto v = TicketV2.Serialize();
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buffer.insert(buffer.end(), v.begin(), v.end());
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v = TicketV4.Serialize();
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buffer.insert(buffer.end(), v.begin(), v.end());
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return buffer;
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}
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}; |