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While the banner, the public savegame, and several other metablocks are encrypted with a shared key, which means any DSi can inspect these parts of the file.
While the banner, the public savegame, and several other metablocks are encrypted with a shared key, which means any DSi can inspect these parts of the file.
[[ES block encryption]] is used to encrypt the header block, footer block, and the 11 parts. Each are their own seperate ES blocks.
[[ES block encryption]] is used to encrypt the header block, footer block, and the 11 content parts. Each are their own seperate ES blocks.
= Tad file structure overview =
= header block @ 0x4020 (size 0xB4) =
{| class="wikitable"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4020 ?
| Banner/Icon
|-
| 0x4020
| 0xB4
| Header
|-
| 0x40F4
| 0x460
| Footer (certificates/hashes)
|-
| 0x4554
| -
| Content parts in sequence (TMD, SRL, savegame, custom banner).
|}
The banner, header, footer and savegame are encrypted with a shared key between each DSi. The other content parts are encrypted with a console specific key.
= Header block @ 0x4020 (size 0xB4) =
0000000: 34 41 4e 54 31 30 00 01 74 e9 2c 1e 24 00 00 00 4ANT10..t.,.$...
0000000: 34 41 4e 54 31 30 00 01 74 e9 2c 1e 24 00 00 00 4ANT10..t.,.$...
0000010: d6 e0 39 c3 98 3f 06 b6 9a b2 9d 14 e7 06 e9 00 ..9..?..........
0000010: d6 e0 39 c3 98 3f 06 b6 9a b2 9d 14 e7 06 e9 00 ..9..?..........