[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