PS3 Package Viewer

A PS3 Package Viewer and Extraction

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A Windows tool for opening PS3 PKG files, browsing their contents, and extracting them.

Note

This tool only decrypts the outer encryption (AES-128-CTR) applied to the whole PKG. Extracted EBOOT.BIN and *.self files remain NPDRM SELF (encrypted executables).

Features

• Open a PKG file and browse its folder tree and file list
  • Shows Name / Size / Type / Offset / Flag
  • Icons based on the file type
  • Double-click (or press Enter on) a folder to open it
• Extract the whole PKG (Tools → Extraction)
• Extract a single file or folder from the file list's context menu
• Extraction progress is shown in the status bar

Supported PKG

Type	revision	Status
PS3 Retail (Finalized)	0x8000	Supported
PS3 Debug (Non-finalized)	0x0000	Implemented, not yet verified
PSP / PS Vita	—	Not supported

Requirements

• Windows 10 / 11
• .NET 10 (Windows Desktop Runtime)

Build

1. Open PackageViewer.slnx in Visual Studio
2. Restore NuGet packages (restored automatically on build)
3. Build and run

Project structure

.
├── PackageViewer.slnx              … Solution file
├── src/
│   └── PackageViewer/
│       ├── PackageViewer.csproj
│       ├── Extensions/
│       │   └── StreamExtensions.cs … Big-endian read/write helpers (Stream extension methods)
│       ├── IO/
│       │   ├── Decoder.cs          … PKG decryption (header and item table, AES-CTR / Debug keystream, signature)
│       │   ├── FileEntry.cs        … A single entry in the item table (ItemRecord + decrypted file name)
│       │   ├── FileType.cs         … File type (EBOOT / SELF / Directory / Image, etc.)
│       │   ├── ItemRecord.cs       … PKG_ITEM_RECORD (0x20 bytes)
│       │   ├── PackageHeader.cs    … Read/write the PKG header (0xC0 bytes)
│       │   └── Unpacker.cs         … Extraction to disk
│       ├── Package.cs              … Decrypted package information
│       ├── RuntimeHelpers.cs       … Application-wide helpers (app name, error dialog)
│       ├── frmMain.cs              … Main window
│       └── frmAbout.cs             … About window
├── resources/
│   ├── appicon.ico
│   └── icon/                       … Icons for the file list
└── docs/
    └── main.png                    … Screenshot

PKG structure (overview)

Range	Contents
0x000–0x0BF	Header (magic \x7FPKG, revision, type, data location, Content ID, IV, etc.)
0x0C0–	Metadata (DRM type, content type, etc.)
data_offset–	Encrypted data area (item table → file names → file data)
Last 0x20 bytes	SHA-1 of the whole file

• All values are big-endian.
• Retail PKGs are encrypted with AES-CTR, using AES-128-ECB(NPDRM PKG PS3 AES key, pkg_data_riv + block index) as the keystream.
• See PS3 Developer Wiki – PKG files for details.

Roadmap

• Create new PKGs (Debug format for CFW)
• Replace files in an opened PKG

Credits

• PS3 Developer Wiki
  • PKG files — Specification of the PKG header, item records, metadata and encryption
• ByteSize (ByteSizeLib) by Omar Khudeira — MIT License
  • Used for displaying file sizes

License

MIT License

This software is provided "as is", without warranty of any kind. The author is not liable for any damages arising from its use.

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