making a plugin encrypt index data

Hello,

I'm encrypting mail on disk using a plugin[0], but the index files are not encrypted (specifically the dovecot.index.cache can be read).

I want to do is encrypt index on disk, so I'm looking for how a plugin can achieve that by hooking into the right locations. Is that easily possible in a plugin?

I can turn off those indexes by passing INDEX=MEMORY, but that isn't possible if I use sdbox/mdbox.

thanks for any suggestions! micah

0. https://0xacab.org/riseuplabs/tofu-scrambler