Difference between revisions of "AM:ImportTwlBackup"
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| Line 18: | Line 18: | ||
|- | |- | ||
| 4 | | 4 | ||
| − | | Handle | + | | [[Filesystem_services|FSFILE]] Handle |
|- | |- | ||
| 5 | | 5 | ||
| Line 24: | Line 24: | ||
|- | |- | ||
| 6 | | 6 | ||
| − | | Buffer Pointer | + | | Buffer Pointer. Input encrypted [[DSiWare_Exports|DSiWare]] export banner, header, and footer. Also used as a work buffer. |
|} | |} | ||
Revision as of 00:18, 17 October 2016
Request
| Index Word | Description |
|---|---|
| 0 | Header code [0x001C0084] |
| 1 | Buffer Size (must be >= 0x20000) |
| 2 | u8, Operation |
| 3 | 0x10 |
| 4 | FSFILE Handle |
| 5 | (Buffer Size << 4) | 0xC |
| 6 | Buffer Pointer. Input encrypted DSiWare export banner, header, and footer. Also used as a work buffer. |
Response
| Index Word | Description |
|---|---|
| 0 | Header code |
| 1 | Result code |
Operation
| Value | Description |
|---|---|
| 0-1 | Invalid, same as values 4 and 7. |
| 2 and 5 | ? |
| 3 and 6 | ? |
| 4 and >=7 | No importing is done here. |
Description
AM module uses AMPXI:DecryptDSiWareData for decrypting each DSiWare section. After decrypting a section via that command, AM module calculates a hash over the decrypted payload data for AMPXI:ValidateDSiWareSectionMAC. The footer hash for this section is then verified by calculating a hash over the cleartext data as well.
After AM module validates the header, AM module then uses AMPXI:ValidateDSiWareMovableSedHash. The footer ECDSA verification is handled by AMPXI:VerifyDSiWareFooter. The decrypted banner is written to inputbuffer+0.