PEC: Difference between revisions
imported>Stoker25 No edit summary |
imported>Sh042067 (added signing stuff, and other information) |
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'''PEC''' (Profile Embedded Content) files are used by the Xbox 360 as an additional layer of security on profiles. Certain [[GPD]] files are relocated inside the PEC file. | '''PEC''' (Profile Embedded Content) files are used by the Xbox 360 as an additional layer of security on profiles. Certain [[GPD]] files are relocated inside the PEC file. The PEC file stores information on avatar clothes/items, and is just another STFS package. With this said you must properly rehash and resign the PEC file to avoid the Xbox detecting corruption of the package. Rehashing is the same as all STFS packages (besides the starting block), but resigning is different (view below). | ||
= Header = | = Header = | ||
| Line 26: | Line 26: | ||
|- | |- | ||
| 0x244 | | 0x244 | ||
| | | 0x24 | ||
| [[STFS#Volume_Descriptor|Structure]] | |||
| Volume Descriptor | |||
| [[STFS#Volume_Descriptor| | |||
| Volume Descriptor | |||
|- | |- | ||
| | | 0x268 | ||
| 0x4 | | 0x4 | ||
| signed int | | signed int | ||
| Unknown | | Unknown | ||
|- | |- | ||
| | | 0x26C | ||
| 0x8 | | 0x8 | ||
| bytes | | bytes | ||
| Profile ID | | Profile ID | ||
|- | |- | ||
| | | 0x274 | ||
| 0x1 | | 0x1 | ||
| byte | | byte | ||
| Unknown | | Unknown | ||
|- | |- | ||
| | | 0x275 | ||
| 0x5 | | 0x5 | ||
| bytes | | bytes | ||
| Line 56: | Line 51: | ||
|} | |} | ||
The signature located in the [[Console Security Certificate]] is signed using the hash at location 0x228. (SHA1 hash from 0x23C - 0x1000) | |||
From 0x1000 the rest of the file is the standard block portion of [[STFS]], with data block 0 starting at 0x3000, and hash table 0 at 0x1000/0x2000. The PEC file always has 2 hash tables (type 1 package). | |||
[[Category:File formats]] | [[Category:File formats]] | ||
Revision as of 17:35, 9 September 2012
PEC (Profile Embedded Content) files are used by the Xbox 360 as an additional layer of security on profiles. Certain GPD files are relocated inside the PEC file. The PEC file stores information on avatar clothes/items, and is just another STFS package. With this said you must properly rehash and resign the PEC file to avoid the Xbox detecting corruption of the package. Rehashing is the same as all STFS packages (besides the starting block), but resigning is different (view below).
Header
| Offset | Length | Type | Information |
|---|---|---|---|
| 0x0 | 0x228 | Console Security Certificate | Signed |
| 0x228 | 0x14 | bytes | SHA1 hash from 0x23C-0x1000 |
| 0x23C | 0x8 | signed long | Unknown |
| 0x244 | 0x24 | Structure | Volume Descriptor |
| 0x268 | 0x4 | signed int | Unknown |
| 0x26C | 0x8 | bytes | Profile ID |
| 0x274 | 0x1 | byte | Unknown |
| 0x275 | 0x5 | bytes | Console ID |
The signature located in the Console Security Certificate is signed using the hash at location 0x228. (SHA1 hash from 0x23C - 0x1000)
From 0x1000 the rest of the file is the standard block portion of STFS, with data block 0 starting at 0x3000, and hash table 0 at 0x1000/0x2000. The PEC file always has 2 hash tables (type 1 package).