The test creates client and server sockets with mismatching protocol versions,
trying different combinations, for example: 1) server (TLS 1.0) vs
client (TLS 1.2) or 2) server (TLS 1.2) vs client (TLS 1.1), etc.
Since TLS v < 1.2 does not support signature algorithms, they are ignored
and handshake is always successful. But our new OpenSSL 1.1 backend uses
generic TLS_client_method and TLS_server_method when creating SSL_CTX.
This means, both server and client will support TLS v. 1.2, they
will have no shared signature algorithms, thus handshake will fail
with an error string similar to this:
"tls1_set_server_sigalgs:no shared signature algorithms".
For OpenSSL 1.1 this test makes no sense.
Task-number: QTBUG-67456
Change-Id: Ibb2a12eea5e5c0ebaeee7d0719cc721ecf4763e6
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
e2694fa602