azot

Azot (Russian word for "nitrogen", pronounced /azо́t/) is a set of tools (JavaScript library, command-line utility and browser extension) for diagnosing, researching, and pentesting Google's Widevine DRM.

Azot is still in the early stages of development, so until version 1.0 is released, performance may be unstable and major changes may be made

Features

• Minimal dependencies
• Runtime agnostic core: works in Node.js, Bun, Deno, browsers and more
• Logging details from EME events in Developer Tools console of current page
• Encrypted Media Extensions API compatibility via requestMediaKeySystemAccess() method
• Converting clients between formats via CLI
• Manifest V3 compliant browser extension
• Custom client support: WVD v2, device_client_id_blob + device_private_key, client_id.bin + private_key.pem
• Network-independent interception, so it doesn't matter if the request has one-time tokens or a custom request/response body format.

Installation

JavaScript library and command-line tool installation requires pre-installed JavaScript runtime (e.g. Node.js).

JavaScript library

npm install azot

Command-line tool

npm install -g azot

Chrome extension

Developer Mode needs to be enabled in chrome://extensions/ page

1. Download archive from latest release
2. Go to chrome://extensions/ page
3. Ensure Developer Mode enabled and then drag and drop downloaded zip file to this page

Read Google's guide

Firefox extension

1. Download archive from latest release
2. Go to about:debugging#/runtime/this-firefox page
3. Click Load Temporary Add-on button and choose downloaded zip file

Temporary add-on is not persistent and will be removed after browser restart

Read Mozilla's guide

Usage

Library

See examples.

Command-line tool

See help: azot --help