You can get a list of the available cipher commands with openssl list-cipher-commands A description is available if you do man enc Doesn't seem to b

You can get a list of the available cipher commands with openssl list-cipher-commands A description is available if you do man enc Doesn't seem to be any reason you couldn't use AES-256-CBC if you wanted to. Not a security expert though, so other than speed concerns, I don't know the repercussions of doing so.