Sealedkey: Difference between revisions
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The first step is to check the HMAC of the file. The process is to use the HMAC key from the [[Keys#PFS_Secret_Keys]] page to check the HMAC at position 0x30 in the file. If it is correct, it proceeds to use the pfsSKKey__EncKey to decrypt the value at +0x20 using the value at +0x10 as the IV. | 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 HMAC at position 0x30 in the file. If it is correct, it proceeds to use the <code>pfsSKKey__EncKey</code> to decrypt the value at +0x20 using the value at +0x10 as the IV. | ||
Revision as of 00:06, 6 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 for encrypted key |
| 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 at position 0x30 in the file. If it is correct, it proceeds to use the pfsSKKey__EncKey to decrypt the value at +0x20 using the value at +0x10 as the IV.