openssl-spkac(1ssl) on Linux
The text 253509bb5e47, as Debian 12 (Bookworm) shipped it.
SPKAC printing and generating command
Flags it lists
-
-challenge -
-digest -
-engine -
-help -
-in -
-key -
-keyform -
-noout -
-out -
-passin -
-propquery -
-provider -
-provider-path -
-pubkey -
-spkac -
-spksect -
-verify