sha256 certificate "unknown message digest algorithm"

Hi,

 

I am using PostgreSQL 9.4.6 and openssl 1.0.2f. If my server or client certificate use SHA256, I get the following error on the client:

 

    psql: SSL error: tlsv1 alert decrypt error

 

And the following log message on the server:

 

    LOG:  could not accept SSL connection: unknown message digest algorithm

 

I could use -sha1 to generate my certificates but -sha256 should work, right?