LabLock 🔒

LabLock is a security-focused VS Code extension designed for controlled programming labs, coding assessments, practical examinations, and supervised coding sessions.

It provides a focused coding environment with Lab Mode, password protection, paste control, built-in calculator, built-in notepad, session timer, and teacher-controlled access.

Important: LabLock is designed to provide strong practical restrictions inside VS Code. A normal VS Code extension cannot completely control the operating system or prevent actions such as using another device, Task Manager, or terminating VS Code externally.

✨ Features

🔒 Lab Mode

LabLock provides a dedicated Lab Mode for controlled programming sessions.

When Lab Mode is active:

• Paste restrictions are enabled.
• Protected actions require authentication.
• Lab status is displayed in the VS Code status bar.
• Optional session timer can be enabled.
• Students can use the built-in calculator and notepad without leaving VS Code.

🚫 Paste Lock

When Lab Mode is active, LabLock can intercept supported VS Code paste actions.

Supported keyboard shortcuts include:

• Ctrl + V — Windows/Linux
• Cmd + V — macOS

When Lab Mode is inactive, normal paste functionality is restored.

LabLock uses the official VS Code Extension API and does not modify the operating system clipboard.

🧮 Built-in Calculator

LabLock includes an integrated calculator so students do not need to leave VS Code for basic calculations.

Supported operations include:

• Addition
• Subtraction
• Multiplication
• Division
• Decimals
• Parentheses
• Percentage
• Clear
• Backspace
• Square root
• Powers
• Scientific functions, where supported

The calculator does not use JavaScript eval() for expression execution.

📝 Built-in Notepad

A built-in notepad allows students to write temporary notes while working.

Useful for:

• Logic planning
• Algorithm ideas
• Temporary calculations
• Problem-solving notes
• Important reminders

The notepad operates inside VS Code instead of opening an external application.

🔐 Password Protection

LabLock uses password authentication for protected actions.

The password is stored using VS Code's:

SecretStorage API

Passwords are not intentionally stored in:

• package.json
• settings.json
• Source code
• Console logs
• Status bar
• Error messages

There is no default password such as 1234.

🔑 Password Management

LabLock supports:

• Initial password setup
• Password verification
• Password change
• Owner/teacher recovery

Changing the password requires verification of the existing password.

Current Password
       ↓
Verify
       ↓
New Password
       ↓
Confirm
       ↓
Password Updated