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Request
| Index Word
|
Description
|
| 0
|
Header code [0x005500C4]
|
| 1
|
Buf0 size (must be 0x10)
|
| 2
|
Buf1 size (must be 0x20)
|
| 3
|
u8, DSiWare section index
|
| 4
|
(Buf0Size << 8) | 0x4
|
| 5
|
Buf0 pointer
|
| 6
|
(Buf1Size << 8) | 0x14
|
| 7
|
Buf1 pointer
|
Response
| Index Word
|
Description
|
| 0
|
Header code [0x00550040]
|
| 1
|
Result code
|
Description
This calculates an AES MAC over the 0x20-byte buf1 SHA-256 hash. When this MAC matches the MAC stored in buf0, result-code 0 is returned, otherwise an error is returned. This is used by AM module to verify the DSiWare section's metadata MAC after decrypting the payload data.