[openssl-users] X509 subject public key id-RSASSA-PSS

[Salz, Rich]

> Does your response mean, that RSA-PSS meanhile _is_ fully supported in 1.1.0?

I hesitate to  say fully, because there are no doubt parts that don't work.  But RSAPSS signatures are supported.
But more importantly, 1.1.1 not 1.1.0

> Any estimations about how much work has to be done for adopting the newer version?

It depends.  Almost all structures are opaque now, so you can't look inside at the fields direcdtly.