Chrome Password Manager Extension

A secure local password manager Chrome extension with authentication and encrypted storage. The link to medium article:

Project Structure

├── manifest.json                 # Chrome extension manifest (Manifest V3)
├── src/
│   ├── popup/                   # Extension popup interface
│   │   ├── popup.html          # Main popup HTML
│   │   ├── popup.css           # Popup styling
│   │   └── popup.js            # Popup logic and UI interactions
│   ├── background/              # Background service worker
│   │   └── background.js       # Core business logic and message routing
│   └── content/                 # Content scripts for web page interaction
│       └── content.js          # Form detection and autofill functionality
├── icons/                       # Extension icons (16, 32, 48, 128px)
└── README.md                    # This file

Features

• Master password protection
• Local encrypted storage
• Right-click context menu integration
• Automatic form detection and filling
• Import/export with key phrase encryption
• Offline functionality

Development Setup

1. Clone this repository
2. Add your Gmail OAuth client ID to manifest.json
3. Create icon files in the icons/ directory
4. Load the extension in Chrome:
   • Open Chrome and go to chrome://extensions/
   • Enable "Developer mode"
   • Click "Load unpacked" and select this directory

Security Features

• AES-256-GCM encryption for all stored data
• PBKDF2 key derivation from master password
• 16-word BIP39-style key phrases for import/export
• No cloud storage - all data stays local
• Secure memory management to prevent data leaks

Requirements Covered

This basic structure addresses all requirements by providing:

• Create Account/signup using Master Password
• 16-word Engligh key phrase geerator using BIP39 word list at time of signup (Needed for import/export of credentials)
• Login using master password
• Manual addition of new credentials, user input: website, username and password and saving done by re-authentication with master password.
• Updating/Editing existing credentials by re-authenticating with master password
• Copying/retrieving existing saved password by re-authenticating with master password.
• Viewing existing saved password by re-authenticating with master password.
• Searching exisitng creds in the search bar.
• Exporting encrypted credentials in .json file by entering the 16-word English key phrase(generated at time of signup)
• Session management and timeout.
• Manual Logout option and auto-logout on browser closer or timeout and with proper cleanup
• Account Delete option.
• Manage permissions option to enable scripting and activeTab permission
• Autofill username and password in existing url from saved credentials from password manager.
• Save creds to password manager by right click menu context.
• Importing .json encrypted credentials file.

Next Steps

The basic project structure is now complete. The next tasks will implement:

1. Import Functionality.
2. UI functionality and aesthetic improvement.
3. Bug Fixes.

Sample UI Images