openssl hmac and key on the command line

[Stephane Chazelas]

2024-06-08 08:43:26 +0100, Stephane Chazelas:
[...]
> Would it be possible to have a: -macopt keyenv:varname and
> -macopt keyexenv:varname for instance to be able to pass the
> secret via environment variables instead (which on most systems
> are a lot less public than command arguments)?
[...]

I see someone at
https://github.com/openssl/openssl/issues/13382#issuecomment-1181577183
with a similar concern suggested -macopt keyfile:file 

-- 
Stephane