npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

@li0ard/playready

v0.1.1

Published

PlayReady CDM implementation in pure TypeScript

Downloads

178

Readme

[!CAUTION]

  • Project doesn't provide encryption/signing key and group certificate for any purposes
  • Project doesn't condone piracy or any action against the terms of the DRM systems
  • Project is for study and research only. Please don't use it for commercial purposes

Features

  • Support .prd deserialization
  • Strictly typed API

Installation

npm i @li0ard/playready

Example

import { Device, CDM, KeyType, CipherType, PSSH } from "@li0ard/playready";

const device = Device.decode(
    Buffer.from("....", "base64"),
    Buffer.from("....", "base64"),
    Buffer.from("....", "base64")
); // Device.fromPrd(....);
const cdm = new CDM(device);

const pssh = PSSH.decode(Buffer.from("....", "base64"));
const challenge = cdm.getLicenseChallenge(pssh.decodedPayload as string);

const license = await (await fetch(`https://test.playready.microsoft.com/service/rightsmanager.asmx?cfg=(persist:false,sl:2000)`, {
    headers: {
        'Content-Type': 'text/xml; charset=UTF-8'
    },
    method: "POST",
    body: challenge
})).text();

for(const key of cdm.parseLicense(license))
    console.log(`- [${KeyType[key.type]}/${CipherType[key.cipher]}] ${key.kid.toHex()}:${key.key.toHex()}`);

Links

  • PlayReady - PlayReady by Microsoft
  • pyplayready - An Open Source Python Implementation of PlayReady CDM (greatly inspired)