Nintendo File Formats

SMM 2 > Level Files

All level files have the same size in Super Mario Maker 2:

Encryption

The file body is encrypted with AES-CBC. The following structure is stored at the end of the level file:

The ENL key generation algorithm is used to generate the keys. However, instead of initializing the random number generator by seed, its internal state is initialized directly with the values from the structure above. Two keys are generated (with the same random number generator):

1. A 16-byte key to decrypt the file body
2. A 16-byte key to calculate or verify the CMAC

The following integer table is passed to the key generation algorithm:

table = [
	0x7AB1C9D2, 0xCA750936, 0x3003E59C, 0xF261014B,
	0x2E25160A, 0xED614811, 0xF1AC6240, 0xD59272CD,
	0xF38549BF, 0x6CF5B327, 0xDA4DB82A, 0x820C435A,
	0xC95609BA, 0x19BE08B0, 0x738E2B81, 0xED3C349A,
	0x045275D1, 0xE0A73635, 0x1DEBF4DA, 0x9924B0DE,
	0x6A1FC367, 0x71970467, 0xFC55ABEB, 0x368D7489,
	0x0CC97D1D, 0x17CC441E, 0x3528D152, 0xD0129B53,
	0xE12A69E9, 0x13D1BDB7, 0x32EAA9ED, 0x42F41D1B,
	0xAEA5F51F, 0x42C5D23C, 0x7CC742ED, 0x723BA5F9,
	0xDE5B99E3, 0x2C0055A4, 0xC38807B4, 0x4C099B61,
	0xC4E4568E, 0x8C29C901, 0xE13B34AC, 0xE7C3F212,
	0xB67EF941, 0x08038965, 0x8AFD1E6A, 0x8E5341A3,
	0xA4C61107, 0xFBAF1418, 0x9B05EF64, 0x3C91734E,
	0x82EC6646, 0xFB19F33E, 0x3BDE6FE2, 0x17A84CCA,
	0xCCDF0CE9, 0x50E4135C, 0xFF2658B2, 0x3780F156,
	0x7D8F5D68, 0x517CBED1, 0x1FCDDF0D, 0x77A58C94
]

File Header

The header is not encrypted.

File Body

Course Metadata