iOS 11 LZFSE compression

iOS 11 introduced lzfse compression which is not yet supported by InflatableDonkey. Database files (sqlite) are particularly affected.

As a workaround you’ll need to manually decompress files using the above tool. The header magic string is bvx2.

I hope to have this issue patched over the next week. Please see #66 for additional details.

[tmyroadctfig]

IIRC LZFSE is quite a bit more than just LZVN, but I’ve ported over that part to Java already here: https://github.com/tmyroadctfig/jnode/blob/master/fs/src/fs/org/jnode/fs/hfsplus/compression/LzvnDecode.java

It might be helpful if you want to move the LZFSE decoding into Java.

[horrorho]

Windows users: I’ve forked lzfse and uploaded a binary executable here. Please unzip before use. I only just about managed to refrain myself from compressing it with lzfse itself to bug you all…

If you would like to build it yourself and I encourage you to do so, then grab Visual Studio Community if you need a compiler and the lzfse source.

Then either:

• use cmake using the guide here and load into Visual Studio and build (release mode).
• create an empty project, import all of the .c and .h files from the src folder and build (release mode).

Usage:

lzfse -decode -i my.sqlite -o my.decoded.sqlite