Sony Walkman Firmware Patcher

This tool is a utility for patching firmware updates for sony walkman devices.

It has only been tested on my personal device (NW-ZX300) but should™ work* on all devices with V2 update encryption, listed below:

• NW-WM1A
• NW-WM1Z
• NW-ZX300
• NW-A30
• NW-A40
• NW-A50
• DMP-Z1

* With the exception of the injector, which will only work on the NW-ZX300.

I welcome PRs, or working with people with the following devices to add support for V1 update encryption:

• NWZ-A10
• NW-A20
• NWZ-E350
• NWZ-E450
• NWZ-E460
• NWZ-A860
• NWZ-A850
• NWZ-A840
• NWZ-E470
• NWZ-E580
• NWZ-S750
• NWZ-X1000
• NW-ZX100
• NW-A820
• NW-S10
• NWZ-S610

I'd also love help from anyone with devices other than the NW-ZX300 to add injector support for your device.

How to use

first, you'll need to install all packages with: npm i

then you'll need to grab your update UPG and place it in the root project directory with the name FW.UPG

you can then run the script with ts-node index (if you have ts-node), or you can compile the typescript and run with tsc -p . followed by node index

the script will then unpack all the files in the update into a directory called ./bins

once you finish modifying the files, you can then hit enter in the script. It will detect modified files and repack them into a UPG called FW_MOD.UPG

it will also attempt to run the injector on this modified binary, by copying the file into inject/Data/Device/NW_WM_FM.UPG and running inject/SoftwareUpdateTool.exe

Assumptions made by the script

1. You are running windows
2. The connected device is an NW-ZX300
3. The 7th data sector in the UPG is compressed
4. The 2nd data sector in the UPG contains a hash for the 7th data sector

While this script was orignally made for my use, i'd love to work with people to reduce and modularize these assumptions.

Documentation on the UPG files