re-unplayplay

A rewritten version of unplayplay, which is a slightly edited version of pbdecrypt.cc.
This library is implementing various cryptography algorithms used by the spotify's DRM called playplay, you can refer to votify to see how it should be used.

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Usage

C++

#include <unplayplay.hpp>

int main(const int argc, const char* argv[]) {
    if (argc < 2) {
        std::cerr << "usage: " 
                  << argv[0] 
                  << " {file_id} {obfuscated_key}" 
                  << std::endl;
        return 1;
    }

    const auto file_id = unplayplay::util::FileId(
        argv[1]
    );
    const auto obfuscated_key = unplayplay::util::Key(
        argv[2]
    );
    
    const auto decrypted_key = unplayplay::decrypt_key(
        obfuscated_key
    );
    const auto result = unplayplay::bind_key(
        decrypted_key, file_id
    );

    for (std::size_t i = 0; i < result.size(); ++i) {
        std::cout << std::setw(2) 
                  << std::setfill('0') 
                  << std::hex 
                  << static_cast<int>(result[i]);
    }
    std::cout << std::endl;

    return 0;
}

Python

from re_unplayplay import decrypt_key, bind_key, decrypt_and_bind_key, get_token

# Get the associated token
get_token()  # returns bytes

# Decrypt the encrypted key
decrypted = decrypt_key(bytes.fromhex('01'))  # returns bytes

# Bind decrypted key
bind_result = bind_key(decrypted, '01')  # returns bytes

# Decrypt and bind in one call
result = decrypt_and_bind_key(bytes.fromhex('01'), '01')  # returns bytes

TypeScript

import { decryptKey, bindKey, decryptAndBindKey, getToken } from 're-unplayplay';

// Get the associated token
getToken(); // returns Buffer

// Decrypt the encrypted key
const decrypted = decryptKey(Buffer.from('01', 'hex')); // returns Buffer

// Bind decrypted key
const bind_result = bindKey(decrypted, '01'); // returns Buffer

// Decrypt and bind in one call
const result = decryptAndBindKey(Buffer.from('01', 'hex'), '01'); // returns Buffer

JavaScript

const re_unplayplay = require('re-unplayplay');

// same as typescript

Installing/building

C++ (cli)

cmake -B build -DRE_UNPP_BUILD_TESTS=0
cmake --build build --config Release

Python

python3 -m pip install -U re-unplayplay

(Java|Type)Script

npm install re-unplayplay

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Contributing

Any contributions you make are greatly appreciated.

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

License

MIT