PSAR
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PSAR means PlayStation ARchive. It's encrypted and used to store various data, e.g. game images (PS1/PSP) or firmware files (UPDATE).
Update PSAR[edit | edit source]
It's possible to decrypt and unpack these PSARs using pspdecrypt.
Header structure[edit | edit source]
| Offset | Type | Description |
|---|---|---|
| 0x00 | char[4] | Signature, always {'P', 'S', 'A', 'R'}
|
| 0x04 | uint32 | Version, known values are from 1 to 5 |
| 0x08 | uint32 | File size without header (-16 bytes) |
| 0x0C | uint32 | Unknown, always 1 (may be encryption tag?) |
PSAR versions[edit | edit source]
| Version | Firmware | Notes |
|---|---|---|
| 1 | 1.00 | Less encrypted |
| 2 | 1.50-1.52 | For 1.50 and later, they mangled the plaintext parts of the header |
| 3 | 2.00-6.61 | Latest version for normal updates |
| 4 | <all known> | Only used for JIG unbrick cards |
| 5 | 6.10-6.61 | Was found in the PSP Go updates |