Sealedkey: Difference between revisions
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| Line 13: | Line 13: | ||
| 0xA || 0x6 || 00 Filler | | 0xA || 0x6 || 00 Filler | ||
|- | |- | ||
| 0x10 || 0x10 || IV | | 0x10 || 0x10 || IV | ||
|- | |- | ||
| 0x20 || 0x10 || Encrypted key | | 0x20 || 0x10 || Encrypted key | ||
| Line 23: | Line 23: | ||
The first step is to check the HMAC of the file. The process is to use the HMAC key <code>pfsSKKey__Secret</code> from the [[Keys#PFS_Secret_Keys]] page to check the <code>HMAC Value</code> at position 0x30 in the file. | The first step is to check the HMAC of the file. The process is to use the HMAC key <code>pfsSKKey__Secret</code> from the [[Keys#PFS_Secret_Keys]] page to check the <code>HMAC Value</code> at position 0x30 in the file. | ||
If it is correct, it proceeds to use the <code>pfsSKKey__EncKey</code> to decrypt the | If it is correct, it proceeds to use the <code>pfsSKKey__EncKey</code> from the [[Keys#PFS_Secret_Keys]] to decrypt the <code>Encrypted key</code> at offset 0x20 using the <code>IV</code> at offset 0x10. | ||
Revision as of 21:50, 8 December 2017
File Structure
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | magic "pfsSKKey" |
| 0x8 | 0x1 | major version (always 2) |
| 0x9 | 0x1 | minor version (always 0) |
| 0xA | 0x6 | 00 Filler |
| 0x10 | 0x10 | IV |
| 0x20 | 0x10 | Encrypted key |
| 0x30 | 0x20 | HMAC Value |
The first step is to check the HMAC of the file. The process is to use the HMAC key pfsSKKey__Secret from the Keys#PFS_Secret_Keys page to check the HMAC Value at position 0x30 in the file.
If it is correct, it proceeds to use the pfsSKKey__EncKey from the Keys#PFS_Secret_Keys to decrypt the Encrypted key at offset 0x20 using the IV at offset 0x10.