hko, I just released version 0.2.0 of https://crates.io/crates/rsop
#rsop is a "Stateless OpenPGP" CLI tool based on #rPGP.
This new version adds more support for handling passphrase-protected private key material, as well as handling of un-armored OpenPGP data.
See https://datatracker.ietf.org/doc/draft-dkg-openpgp-stateless-cli/ for more on SOP.