Console Security Certificate

The Console Security Certificate is used by the Xbox 360 as the format of all RSA signatures generated by it. The total length of the certificate is 552 (0x228) bytes.

Structure

Offset	Length	Type	Information
0x0	0x2	bytes	Public Key Certificate Size
0x2	0x5	bytes	Console ID
0x7	0xB	ascii string	Console Part Number
0x12	0x4	int	Reserved
0x16	0x2	short	Privileges
0x18	0x4	int	Console Type (0x02 for retail, anything different is devkit)
0x1C	0x8	ascii string	Certificate Date of Generation
0x24	0x4	bytes	Public Exponent
0x28	0x80	bytes	Public Modulus
0xA8	0x100	bytes	Certificate Signature
0x1A8	0x80	bytes	Signature

Notes

The console type field can be very strange, especially with older pre-1888 dashboards, for example two different 1838 keyvaults identify their console type as 0x80000002. If you want to check if something is devkit or retail, I'd suggest something like:

if(consoletype == 0x02)
    return retail;
else
    return devkit;