deezer

Deezer

Listen, um, I don’t really know what’s going on here, but I’m leaving. I don’t know where exactly, but I’m gonna start over.

Come with me. Please.

Paint it Black (2016)

Download audio from Deezer

API

GetData:

Given a SNG_ID, return Results.Data

GetSource:

Given SNG_ID, Results.Data and quality, return audio URL

Decrypt:

Given SNG_ID and byte slice, decrypt byte slice in place

Thanks

• https://github.com/moon004/Go-deezer-downloader
• https://pkg.go.dev/github.com/godeezer/lib/deezer
• https://pkg.go.dev/github.com/joshbarrass/deezerdl/pkg/deezer

AES

Used for URL Generation

Go to the "source" panel of browser debugger, to show the deezer webworker source code. pretty print the source. put a breakpoint on the latest occurrence of the "JSON" word. Play a new track, to trigger the breakpoint You see the keys in the the current scope.

[...key].map(e=>String.fromCharCode(e)).join('');

CBC

Used for track deciphering

Same method as the DZR_AES, but the CBC keys are split in 2 arrays that need to be reassembled using the following script

let a=[97, ... 103];
let b=[49, ... 52];

[].
concat(...a.map((c,i)=>[a[i],b[i]]).reverse()).
map(e=>String.fromCharCode(e)).
join(''):