PlayreadyProxy2

An extension-based proxy for PlayReady EME challenges and license messages.
Modifies the challenge before it reaches the web player and retrieves the decryption keys from the response.

Features

• User-friendly / GUI-based
• Bypasses one-time tokens, hashes, and license wrapping
• JavaScript native PlayReady implementation
• Supports PlayReady Device files
• Manifest V3 compliant

PlayReady Devices

This addon requires a PlayReady Device file to work, which is not provided by this project.

Compatibility

• Compatible (tested) browsers: Edge/Firefox on Windows.

[!NOTE]
Some sites may default to Widevine even if PlayReady is supported by both the browser and website. Consider disabling Widevine and trying again

Installation

• Chrome
  1. Download the ZIP file from the releases section
  2. Navigate to chrome://extensions/
  3. Enable Developer mode
  4. Drag-and-drop the downloaded file into the window
• Firefox
  • Persistent installation
    1. Download the XPI file from the releases section
    2. Navigate to about:addons
    3. Click the settings icon and choose Install Add-on From File...
    4. Select the downloaded file
  • Temporary installation
    1. Download the ZIP file from the releases section
    2. Navigate to about:debugging#/runtime/this-firefox
    3. Click Load Temporary Add-on... and select the downloaded file

Setup

PlayReady Device

If you only have a bgroupcert.dat and zgpriv.dat, run this command to create a .prd file:

pyplayready create-device -k zgpriv.dat -c bgroupcert.dat

Now, open the extension, click Choose File and select your PlayReady Device file.

Usage

All the user has to do is to play a DRM protected video and the decryption keys should appear in the Keys group box (if the service is not unsupported, as stated above).
Keys are saved:

• Temporarily until the extension is either refreshed manually (if installed temporarily) or a removal of the keys is manually initiated.
• Permanently in the extension's chrome.storage.local storage until manually wiped or exported via the command line.

[!NOTE]
The video will not play when the interception is active, as the PlayReady CDM library isn't able to decrypt the license keys.

• Click the + button to expand the section to reveal the WRMHEADER and keys.

Issues

• DRM playback won't work when the extension is disabled and EME Logger is active. This is caused by my fix for dealing with EME Logger interference (solutions are welcome).

Disclaimer

• This program is intended solely for educational purposes.
• Do not use this program to decrypt or access any content for which you do not have the legal rights or explicit permission.
• Unauthorized decryption or distribution of copyrighted materials is a violation of applicable laws and intellectual property rights.
• This tool must not be used for any illegal activities, including but not limited to piracy, circumventing digital rights management (DRM), or unauthorized access to protected content.
• The developers, contributors, and maintainers of this program are not responsible for any misuse or illegal activities performed using this software.
• By using this program, you agree to comply with all applicable laws and regulations governing digital rights and copyright protections.

Credits

• forge
• noble-curves
• xmldom