Layout
Loc.dat is encrypted using the SDKey and SD-IV values.
The general layout of this file is as follows.
| Offset
|
Length
|
Description
|
| 0x0
|
0x4
|
Magic - "sdal"
|
| 0x4
|
0x10
|
File MD5 Sum (padded with MD5-blanker before hash calculation)
|
| 0x14
|
0x3C0
|
List of channels on the SDMenu. (Each slot is 4 bytes. Empty slot indicated by 0x00000000.)
|
| 0x3D4
|
0xC
|
Padded with 0s.
|
Here's some C structures:
typedef struct
{
char tid[4]; // The lower 4 bytes of the channels Title ID.
} SDList;
typedef struct
{
char magic[4]; // The Magic. Always `sdal'
u8 md5[0x10]; // MD5 sum. Pad with MD5-Blanker.
SDList list[240]; // The entries. Same order as on the menu.
u8 padding[12]; // Padding with 0's.
} Locdat;
Credit to CaitSith2, and Galaxy| for this finding.
