Qt 5.7.1: No SOCKS5 authentication

qtacc32

Hello,

(I'm currently using pre-built binaries because I don't know how to build the web engine module myself)

it seems that SOCKS5 authentication is not possible with the Web Engine?
I'm setting an application-wide proxy, then loading the page.
With wireshark I can see that Qt sends "5 0 1" (socks protocol) which means "no authentication method", the server refuses.
But I'm setting user+password:

QNetworkProxy proxy;
proxy.setType(QNetworkProxy::Socks5Proxy);
proxy.setHostName("...");
proxy.setPort(1080);
proxy.setUser("...");
proxy.setPassword("...");
QNetworkProxy::setApplicationProxy(proxy);

Also, authenticationRequired & proxyAuthenticationRequired signals are never fired from the page.

What's going on here?

Thank you.