LockMaster

LockMaster is a cross-platform desktop application (macOS & Windows) that allows you to lock, unlock, encrypt, and decrypt files or folders. It features a hacker-style Matrix rain background, permission-based locking, and strong AES encryption.

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Features

• Lock / Unlock:
  • macOS: Applies immutable user locks (chflags uchg) displaying the native Finder lock badge + strict POSIX ACLs (chmod +a "everyone deny ...") preventing reading, editing, or deleting. Unlocking safely clears ACLs (chmod -N) and removes the immutable flag (chflags nouchg).
  • Windows: ACL permission locking via cacls.
• Encrypt / Decrypt: Secure files and full folders with AES encryption via Fernet.
• Folder Support: Easily encrypt and decrypt both individual files and entire directories.
• Progress Bar: Visual indicator for encryption and decryption progress.
• Matrix Rain Effect: Hacker-style animated matrix rain background.
• Ready-to-Use Packages:
  • macOS: Ready-to-use LockMaster.dmg and standalone LockMaster.app in dist/.
  • Windows: Ready-to-run LockMaster.exe in dist/.

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Installation & Running

macOS (DMG & App)

1. Open dist/LockMaster.dmg.
2. Drag LockMaster.app into your Applications folder (or double-click to run directly).
3. (Alternatively) Run open dist/LockMaster.app from Terminal.

Windows (EXE)

1. Go to the dist folder.
2. Double-click LockMaster.exe.

Run from Source (macOS & Windows)

1. Create and activate a virtual environment (recommended):

   python3 -m venv .venv
   source .venv/bin/activate    # On Windows: .venv\Scripts\activate

2. Install dependencies:

   pip install -r requirements.txt

3. Run the app:

   python LockMaster.py

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Building the macOS DMG

To rebuild the macOS .app bundle and .dmg installer:

./build_dmg.sh

Or with Python:

python3 build_dmg.py

The output LockMaster.dmg and LockMaster.app will be created inside the dist/ directory.

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Building the Windows EXE

To rebuild the Windows .exe:

pyinstaller --onefile --noconsole --icon=icon.ico LockMaster.py

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Usage

1. Click Browse to select a file or folder.
2. Use Lock / Unlock to toggle file system permissions and immutable flags.
3. Use Encrypt / Decrypt to encrypt or decrypt the content using AES encryption.

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Notes & Key Management

• Secret Key: Encryption uses a local secret.key file. LockMaster saves and checks keys in ~/.lockmaster/secret.key, alongside target files, and in the app directory. Keep your key safe to decrypt your data.
• Sounds: On macOS, audio alerts use native system chimes (afplay), while on Windows it uses winsound.

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License

Open source for personal and educational use. Made with ❤️ by Navneet Singh.