[SOLVED] Cannot open website with https - OpenSSL Issue - Qt 5.4.1 - Mac OS X Yosemite 10.10.3

Hoa Ho

Hi Qt experts,

I've just joined awesome Qt community recently. As part of learning QWebView and load "https://www.google.com".

And I'm having a problem with getting Qt to work with SSL on mac OS X.
** Without SSL, the app works just fine with http://www.google.com

Environment

Qt 5.4.1 - Installed with Installer
Mac OSX Yosemite 10.10.3
Qt Creator 3.4.0
Widget-based App

Problem
I get following errors, and the webpage is not loaded - just blank/white

qt.network.ssl: QSslSocket: cannot resolve TLSv1_1_client_method
qt.network.ssl: QSslSocket: cannot resolve TLSv1_2_client_method
qt.network.ssl: QSslSocket: cannot resolve TLSv1_1_server_method
qt.network.ssl: QSslSocket: cannot resolve TLSv1_2_server_method
qt.network.ssl: QSslSocket: cannot resolve SSL_select_next_proto
qt.network.ssl: QSslSocket: cannot resolve SSL_CTX_set_next_proto_select_cb
qt.network.ssl: QSslSocket: cannot resolve SSL_get0_next_proto_negotiated

After googling, all answers that I got so far point out that in Mac OS X, old version of openssl is used, and Qt 5.4.1 requires SSL 1.0 or newer. So I updated openssl - using home-brew.

$openssl version
OpenSSL 1.0.2 22 Jan 2015

In my project .pro file, I have following setup

macx: LIBS += -L$$PWD/../../../../../../../usr/local/Cellar/openssl/1.0.2/lib/ -lcrypto -lssl

INCLUDEPATH += $$PWD/../../../../../../../usr/local/Cellar/openssl/1.0.2/include
DEPENDPATH += $$PWD/../../../../../../../usr/local/Cellar/openssl/1.0.2/include

In my codes, I added following codes for debugging

qDebug() << "Support SSL:  " << QSslSocket::supportsSsl()
        << "\nLib Version Number: " << QSslSocket::sslLibraryVersionNumber()
        << "\nLib Version String: " << QSslSocket::sslLibraryVersionString()
        << "\nLib Build Version Number: " << QSslSocket::sslLibraryBuildVersionNumber()
        << "\nLib Build Version String: " << QSslSocket::sslLibraryBuildVersionString();

and here is debug messages

Support SSL:   true 
Lib Version Number:  9470431 
Lib Version String:  "OpenSSL 0.9.8zd 8 Jan 2015" 
Lib Build Version Number:  268439727 
Lib Build Version String:  "OpenSSL 1.0.1j 15 Oct 2014"

Since I don't change the link to default openssl which is in /usr/bin/openssl.

$which openssl
/usr/local/Cellar/openssl/1.0.2/bin/openssl

$whereis openssl
/usr/bin/openssl

Does it make Qt pick up "Lib Version String: "OpenSSL 0.9.8zd 8 Jan 2015"? And why Qt picks "OpenSSL 1.0.1j 15 Oct 2014" as well?

Could someone point out what is wrong?

Thanks,

mcosta

HI and welcome to devnet,

Qt has embedded support to openssl so you don't need to link the system openssl library.
Using QtWebkit I have the same behaviour; using QtWebEngineView it works

Hoa Ho

@mcosta Thanks mcosta

Yes, indeed I can show website over https with WebEngine, even though it still show those warning messages. As documented here, Web Kit will be deprecated in Qt version 5.5+, so I'll switch to use WebEngine then.

For those who feel annoyed with the warning messages, you could suppress them by calling following method in your main()

QLoggingCategory::setFilterRules("qt.network.ssl.w arning=false");

or by setting environment variable

QT_LOGGING_RULES=qt.network.ssl.warning=false