18
edits
Changes
m
Hiccup moved page Tad to SD title export
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Line 1:
−
+
+
The System Settings application delivered with each DSi can be used to export applications from NAND to SD. The files created on SD are encrypted with AES CCM (CTR with CBC-MAC), using a combination of a shared key and a console specific key.
+The System Settings application delivered with each DSi can be used to export applications from NAND to SD. The bin files created on SD are using the following file structure. They are encrypted with AES CCM (CTR with CBC-MAC), using a combination of a shared key and a console specific key.
The application itself (APP), and the title metadata (TMD) is encrypted with a console specific key. This means that Nintendo intended that these files can only be imported back into the same DSi.
The application itself (APP), and the title metadata (TMD) is encrypted with a console specific key. This means that Nintendo intended that these files can only be imported back into the same DSi.
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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.
+= File structure overview =
−= header =
+{| class="wikitable"
+|-
+! Offset
+! Size
+! Description
+|-
+| 0x0
+| 0x4020
+| Banner/Icon
+|-
+| 0x4020
+| 0xD4
+| 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..?..........
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| 0x10
| 0x10
| 16
| 16
−| Extracted from HWINFO_N.dat
+| Console ID from HWINFO_N.dat
|-
|-
| 0x20
| 0x20
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|}
|}
−= footer block =
+= footer block @ 0x40F4 (size 0x460) =
0000000: d6 f3 24 7c a1 0f 4a dc cd 07 34 d6 ce 62 32 93 ..$|..J...4..b2.
0000000: d6 f3 24 7c a1 0f 4a dc cd 07 34 d6 ce 62 32 93 ..$|..J...4..b2.
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| 0xdc
| 0xdc
| 20
| 20
−| SHA-1 of save data
+| SHA1 of save data
|-
|-
| 0xf0
| 0xf0
| 20
| 20
−| SHA-1 of ?
+| SHA1 of ?
|-
|-
| 0x104
| 0x104