Hi @ngraham Thanks for letting me know! I've opened the PR over on gitlab: https://invent.kde.org/frameworks/kwallet/-/merge_requests/1. It must be quite a mission getting everyone over to new platforms 😓 😄

This stack overflow answer has a more exhaustive approach to determining endianness. It may be worth extracting this code into a more appropriate header file though. Also here's the issue on the bugzilla tracker