[stunnel-users] stunnel.cnf should set keyUsage = keyCertSign

Michal Trojnara Michal.Trojnara at mirt.net
Tue Mar 11 11:45:45 CET 2014

Athir Nuaimi wrote:
> Im trying to write a go program to connect to an stunnel server and
> verify the certificate but it fails because the go language requires
> that self-signed certs have keyCertSign set in the keyUsages.  the
> default stunnel.cnf does not set this.  According to the following
> message thread this is required by RFC 5280.
> https://groups.google.com/forum/#!msg/golang-nuts/LfLHjVkeSj8/YyP-LSPEytEJ
> [1]
> The solution to this is to add keyUsage = keyCertSign to the
> stunnel.cnf.

Good point.  What would be the right options for self-signed SSL certs?

My guess is:

nsCertType       = server
basicConstraints = CA:TRUE,pathlen:0
keyUsage         = keyCertSign
extendedKeyUsage = serverAuth


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