I wrote this small, ~8K utility to resize softraid crypto volumes back in March, after a thread on misc that highlighted that there was not already code to do this:
https://marc.info/?l=openbsd-misc&m=164812563223554&w=2 The source has been downloaded a number of times from our website: https://www.exoticsilicon.com/research/resizing_softraid_volumes ... and there have been no complaints so far. Since people are either using it, or at least interested in it, I've created a port, (attached). Incidentally, in the process of writing es-srme, I discovered a kernel bug, which I posted about on tech, but which has not yet been fixed in CVS: https://marc.info/?l=openbsd-tech&m=164834052628572&w=2
sysutils.es-srme.tar.gz
Description: application/tar-gz