janny773 / xld_sign

Sign/Verify Logs from X Lossless Decoder(XLD)

Sign X Lossless Decoder(XLD) log

This is a 32bit app due to the nature of the signing algorithm so you need 32bit libs

• e.g. apt-get install libssl-dev:i386

Compile with -m32

Tested on Debian 64

Tools used:

• Ollydbg
• Wine
• IDA Pro with Hex-Rays decompiler

Notes

• First of the algo uses a custom IV for it's SHA256

• Then lots of messing around

• And jumping around a base64 table.

• Most the code here is fixed up Hex-Rays dump from the Mac XLDLogChecker.bundle

• The AKA sub_401AA0 refer to the win32 xldlogchecker.exe