Tron: Evolution Mod

Save File

Located in %USERPROFILE%\Documents\Disney Interactive Studios\Tron Evolution\SaveData\<XUID>\Save\CHECKPT.

XUID Folder is formatted as a 16 zero-padded hex-string of type of type unsigned __int64. Example: 0xE00000FDBD7D2113.

Structure

Save Data Checks

The game does roughly the following:

• Read Header (size = 1024 bytes)
  • Verify header CRC from offset 0-1024
  • Verify body CRC32
• Read Body (size = from header)
• Read Encrypted Data (size = 360)
  • Decrypted with XLiveUnprotectData function
    • First call is used to determine size of data (always 8 bytes) and to get a handle
    • Second call is used to get the original data with the values of the first call
      • Original data (size = 8 bytes) contains CRC values
        • First 4 bytes is the CRC value of the header (header offset 0x03FC)
        • Next 4 bytes is the CRC value of the body (header offset 0x0008)
  • Final call to XLiveCloseProtectedDataContext is used to close the handle

Protected Data

The game does this when saving:

• Call to XUserGetSigninInfo to get some information for the next call
• Call to XLiveCreateProtectedDataContext
  • Requires context information such as
    • How much to allocate (always 8 bytes)
    • Flags which will be set to 0x0001 if the user is signed in online
  • Provides a handle
• Two calls to XLiveProtectData
  • First call to determine the size of data (always 8 bytes)
  • Second call to protect the data
    • First 4 bytes is the CRC value of the header (header offset 0x03FC)
    • Next 4 bytes is the CRC value of the body (header offset 0x0008)
• Final call to XLiveCloseProtectedDataContext with the handle

Save Data