openssl engine -help

saolasosme

Engine (loadable module) information and manipulation.

$ openssl engine -help
Usage: engine [options] engine...
  engine... Engines to load
 -help      Display this summary
 -v         List 'control commands' For each specified engine
 -vv        Also display each command's description
 -vvv       Also add the input flags for each command
 -vvvv      Also show internal input flags
 -c         List the capabilities of specified engine
 -t         Check that specified engine is available
 -tt        Display error trace for unavailable engines
 -pre val   Run command against the ENGINE before loading it
 -post val  Run command against the ENGINE after loading it
            Commands are like "SO_PATH:/lib/libdriver.so"