asivery/networkwm-js

A typescript library for accessing Sony Network Walkman devices

Work In Progress!!

JS library for accessing Sony Network Walkmen

This library aims to provide support for managing audio content on Sony Network Walkman devices. It supports the same functionality as SonicStage - the original Sony application required to communicate with them.

For now, it is impossible to use this library as a standalone application - there's no CLI available.

What features are available?

• Track upload (ATRAC3 / ATRAC3+)
• DRM reimplementation
• Fetching contents' list
• Track upload (MP3)
• Track metadata editing (Title / Album / Artist / Genre)
• Track moving
• Track deletion
• OMA file decryption

How to incorporate it into your project?

The library piggybacks on himd-js to provide low-level filesystem and SCSI functionality. Because of how the DRM requires vendor SCSI commands to be sent to the Network Walkman, it is impossible to upload a track and have it play on the device without SCSI access, but similarly to himd-js, it provides a way to edit the player's metadata.

1 - Metadata access only

In this mode, it's only possible to read and write tracks' metadata (titles, track play order, etc.)

It is not possible to upload ATRAC3/3+/PCM with this mode.

Example:

async function example(){
    // When using Node.JS:
    const fs = new NativeHiMDFilesystem("/path/to/HiMD/root");

    const db = new DatabaseManager(fs);
    await db.init();
}

2 - Direct mode (USB Mass Storage Controller mode)

Because this mode takes full control over the Network Walkman, and can issue direct SCSI commands, it's possible to upload ATRAC3/3+ audio.

All the examples from mode 1 which utilize the DatabaseManager object still work.

Example:

async function example(){
    await initCrypto();
    importKeys(...);
    const _dev = await openNewDeviceNode();
    if(!_dev) {
        console.log("Could not connect!");
        return;
    }
    const { dev, name } = _dev;
    console.log(`Connected to ${name}`);
    const fs = await createNWJSFS(dev, false);
    // Open a writing session
    const session = new UMSCNWJSSession(fs.driver as SonyVendorNWJSUSMCDriver, fs);
    await session.performAuthorization();

    const database = new DatabaseManager(fs);
    await database.init();

    // Read the track
    const trackContents = new Uint8Array(nodeFs.readFileSync("/path/to/raw/atrac.wav")).slice(0x60);
    const codec = generateCodecInfo("A3+", HiMDKBPSToFrameSize.atrac3plus[352]);
    await uploadTrack(database, session, {
        album: "Foobar - The Greatest Hits",
        artist: "Foobaz",
        genre: "Bar",
        title: "Foobar",
    }, codec, trackContents);

    database.reserializeTables();
    await database.rewriteTables();
    await session.finalizeSession();
}

It is also possible to use this library to simply sign the device, so that it plays audio which could have been copied across from a different Network Walkman. To do that, it's simply enough to perform the authorization, and then finalize the session straightaway.

async function example(){
    await initCrypto();
    importKeys(...);
    const _dev = await openNewDeviceNode();
    if(!_dev) {
        console.log("Could not connect!");
        return;
    }
    const { dev, name } = _dev;
    console.log(`Connected to ${name}`);
    const fs = await createNWJSFS(dev, false);

    // Start a new session...
    const session = new UMSCNWJSSession(fs.driver as SonyVendorNWJSUSMCDriver, fs);
    await session.performAuthorization();
    // ...and terminate it
    await session.finalizeSession();
    // At this point, the Walkman should play the audio.
}

Credits

• Thank you to M Karcher over at the MiniDisc.wiki Discord server for explaining how the OpenMG keys deriving and SCSI authentication works
• The rustystage project provided excellent documentation of the database format.