PS3 Package Viewer

A PS3 Package Viewer and Extraction

English | 日本語

A desktop tool for opening PS3 PKG files, browsing their contents, and extracting them. The UI is built with Avalonia UI (dark theme).

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
  • Double-click (or press Enter on) a file to extract it
• Extract the whole PKG (Tools → Extraction)
• Extract a single file or folder from the file list's context menu
• Extract a folder and everything under it from the folder tree's context menu (the root extracts the whole PKG)
• Extraction progress is shown in the status bar
• Pass a .pkg path on the command line (or drop a file onto the executable) to open it at startup

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 (Avalonia also runs on Linux / macOS, but only Windows has been tested)
• .NET 10 Runtime

Build

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

Or from the command line:

dotnet run --project src/PackageViewer

Project structure

.
├── PackageViewer.slnx              … Solution file
├── src/
│   └── PackageViewer/
│       ├── PackageViewer.csproj
│       ├── Program.cs              … Entry point (Avalonia app builder)
│       ├── App.axaml               … Application (Fluent dark theme, global styles)
│       ├── Assets/
│       │   ├── appicon.ico
│       │   └── Icons/              … PNG icons embedded as Avalonia resources
│       ├── 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, version, dialogs)
│       ├── Models/
│       │   ├── FolderNode.cs       … A folder in the folder tree
│       │   ├── FileRow.cs          … A row in the file list
│       │   └── Icons.cs            … Icon loading / cache
│       └── Views/
│           ├── MainWindow.axaml    … Main window
│           ├── AboutWindow.axaml   … About window
│           └── MessageDialog.axaml … Information / error dialog
├── resources/
│   ├── appicon.ico
│   └── icon/                       … Original ICO icons (converted to PNG under Assets/Icons)
└── 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
• Avalonia UI — MIT License
  • Cross-platform UI framework (Fluent theme, DataGrid)
• 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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