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.
- User-friendly / GUI-based
- Bypasses one-time tokens, hashes, and license wrapping
- JavaScript native PlayReady implementation
- Supports PlayReady Device files
- Manifest V3 compliant
This addon requires a PlayReady Device file to work, which is not provided by this project.
- Compatible (tested) browsers: Edge/Firefox on Windows.
- Chrome
- Download the ZIP file from the releases section
- Navigate to
chrome://extensions/ - Enable
Developer mode - Drag-and-drop the downloaded file into the window
- Firefox
- Persistent installation
- Download the XPI file from the releases section
- Navigate to
about:addons - Click the settings icon and choose
Install Add-on From File... - Select the downloaded file
- Temporary installation
- Download the ZIP file from the releases section
- Navigate to
about:debugging#/runtime/this-firefox - Click
Load Temporary Add-on...and select the downloaded file
- Persistent installation
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.
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.localstorage 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.
- 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).
- 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.