Archive.dat
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The archive.dat file format is used to store PS5 Backup and Restore (BAR) data. The backup/restore system will create an archive.dat file(s) on a USB drive which will contain a backup of your entire HDD. The structure has changed from it's predecessor and all data stored in here is in little endian format.
SIECAF File Structure
Structure:
- Header
- Repeating Section Meta Blocks
- Repeating Section Hash Blocks
Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Magic 0x5349454341460000 SIECAF\0\0
|
| 0x8 | 0x8 | Version |
| 0x10 | 0x8 | Unknown (0x1) |
| 0x18 | 0x8 | Unknown (0x1) |
| 0x20 | 0x10 | Encryption IV? Since it was removed in the metadata blocks. |
| 0x30 | 0x4 | Unknown size |
| 0x34 | 0x4 | Unknown size |
| 0x38 | 0x4 | Unknown size |
| 0x3C | 0x4 | Padding |
| 0x40 | 0x8 | Number of Segments |
| 0x48 | 0x8 | File Offset |
| 0x50 | 0x8 | File Size |
Section Meta Block
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Section ID |
| 0x8 | 0x8 | Section Start Offset |
| 0x10 | 0x8 | Unaligned Section Length |
| 0x18 | 0x8 | Hash Key ID (0x0000000000000003) |
| 0x20 | 0x8 | Encryption Key ID (0x0000000000000001) |
| 0x28 | 0x10 | Encryption IV (null bytes) |
| 0x38 | 0x8 | Aligned Section Length |
Section Hash Block
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Section ID |
| 0x8 | 0x10 | Hash (128-bit) |
| 0x18 | 0x18 | Padding |
Updating once further research has been made...