This is the code associated to our paper of the same title, by Hiroki Okada, Rachel Player and Simon Pohmann eprint/2023/1304, to be published at Asiacrypt 2023.
The code is modern C++ using the MS Seal library. I usually compile the code with Visual Studio (Windows), also added a very simple Makefile to run it with gcc. Some comments in the code are written in Tex, so consider using https://marketplace.visualstudio.com/items?itemName=vs-publisher-1305558.VsTeXCommentsExtension2022 with Visual Studio.