https://gitlab.com/cryptsetup/cryptsetup
https://gitlab.com/cryptsetup/cryptsetup/-/wikis/FrequentlyAskedQuestions
https://gitlab.com/cryptsetup/LUKS2-docs
https://gitlab.com/cryptsetup/LUKS2-docs/blob/master/luks2_doc_wip.pdf

luks1
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/LUKS_docs/on-disk-format.pdf