Difference between revisions of "AMPXI:ValidateDSiWareSectionMAC"
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| − | | Buf0Size<<8 <nowiki>|</nowiki> 0x4 | + | | (Buf0Size<<8) <nowiki>|</nowiki> 0x4 |
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| 6 | | 6 | ||
| − | | Buf1Size<<8 <nowiki>|</nowiki> 0x14 | + | | (Buf1Size<<8) <nowiki>|</nowiki> 0x14 |
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| 7 | | 7 | ||
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=Description= | =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 to verify the DSiWare section's [[DSiWare_Exports|metadata]] MAC after decrypting the payload data. | + | 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:ImportDSiWare|AM]] module to verify the DSiWare section's [[DSiWare_Exports|metadata]] MAC after decrypting the payload data. |
Revision as of 18:06, 25 April 2013
Request
| Index Word | Description |
|---|---|
| 0 | Header code [0x005500C4] |
| 1 | Buf0 size, must be 0x10-bytes. |
| 2 | Buf1 size, must be 0x20-bytes. |
| 3 | u8 DSiWare section index |
| 4 | (Buf0Size<<8) | 0x4 |
| 5 | Buf0 ptr |
| 6 | (Buf1Size<<8) | 0x14 |
| 7 | Buf1 ptr |
Response
| Index Word | Description |
|---|---|
| 0 | Header code |
| 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.