"qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed" even though SSL is installed

[Donald Duck]

I'm trying to send a simple HTTP request:

void sendRequest(){
    QNetworkAccessManager *manager = new QNetworkAccessManager();
    QObject::connect(manager, &QNetworkAccessManager::finished, [manager](QNetworkReply *reply){
        qDebug() << QString::fromUtf8(reply->readAll());
        delete manager;
    });
    manager->get(QNetworkRequest(QUrl("https://google.com")));
}

When I run this code, I get this error, even after I installed SSL through the maintenance tool:

qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed

I tried copying all the files in C:\Qt\Tools\OpenSSLv3\Win_x64\bin to the same folder as my executable is in, but that didn't help. These are the files I tried copying:

c_rehash.pl
libcrypto-3-x64.dll
libcrypto-3-x64.pdb
libssl-3-x64.dll
libssl-3-x64.pdb
openssl.exe
openssl.pdb

If I run

qDebug() << QSslSocket::supportsSsl() << QSslSocket::sslLibraryBuildVersionString() << QSslSocket::sslLibraryVersionString();

I get this output:

false "OpenSSL 1.1.1g  21 Apr 2020" ""

[SGaist]

No, it's not required although advised. You can get OpenSSL 1.1 and use it with 5.15.2.

[SGaist]

Hi,

Which version of Qt are you using ?

[Donald Duck]

@SGaist I'm using 5.15.2.

[SGaist]

Then that is your issue, Qt 5.15.2 supports OpenSSL 1.1

[Donald Duck]

@SGaist So does that mean that I need to upgrade to Qt 6?

[SGaist]

No, it's not required although advised. You can get OpenSSL 1.1 and use it with 5.15.2.

[keksi venksi]

@SGaist Can you please help me to solve the same issue in my case

Im using qt5.15.2 and when I try to print the sslversion its "OpenSSL 1.1.1g"

When i try to command the openssl version in my machine its "OpenSSL 1.1.1q "

So here it means my machine needs to match with "OpenSSL 1.1.1g" or below than that right ?

If so can you please give me a link of downloading openssl 1.1.1g exe file

[SGaist]

@keksi-venksi What do you get if you put:

qDebug() << QSslSocket::supportsSsl() << QSslSocket::sslLibraryBuildVersionString() << QSslSocket::sslLibraryVersionString();
in your code ?

Changing the patch version should not be a problem to load OpenSSL.
Where did you install it ?

[keksi venksi]

@SGaist

if (QSslSocket::supportsSsl()) {
qDebug() << "SSL is supported.";
} else {
qDebug() << "SSL is not supported.";
qDebug() << "Build Version:" << QSslSocket::sslLibraryBuildVersionString();
qDebug() << "Loaded Version:" << QSslSocket::sslLibraryVersionString();
}
The above code returned a value of
SSL is not supported.
Build Version: "OpenSSL 1.1.1d 10 Sep 2019"
Loaded Version: ""

Im using both qt 5.14.2 and qt5.15.2

If i print it in Qt5.14.2 the open ssl version is OpenSSL 1.1.1d
If i print it in Qt5.15.2 the open ssl version is OpenSSL 1.1.1g

My cmd output it
openssl version
OpenSSL 1.1.1q 5 Jul 2022

I installed in the C folder "C:\Qt\Qt5.15\5.15.2"

Also I would like to puts some debugging notes

When I use HTTPS:somelink , the reply is TLS initialization failed.
but when I use HTTP:somelink the reply is fine

[SGaist]

That's because the dlls cannot be found at run time hence the empty "Loaded Version".

Go to the Run part of the Project panel and add the path to were the dlls are to the PATH environment variable.

[keksi venksi]

@SGaist Which dll's ? openSSL one

I have added this "C:\Qt\Qt5.15\Tools\OpenSSLv3\Win_x64\bin" one into path in both environmental variables and in project run's build environment as well

but dlls name's have an extra point that it has version name in it as libcrypto-3-x64.dll libssl-3-x64.dll

[keksi venksi]

This post is deleted!

[hskoglund]

Hi, one other thing you can try is to build and run the "Secure Socket Client Example" in Qt's examples. (it's included both in Qt 5.14 and 5.15.) Make sure you run in it Release mode (not Debug).
If that example works, then maybe you can copy the files from it...

[Bonnie]

@keksi-venksi Here it is, since you are using Qt5.15.2, according to the Qt source code (https://code.qt.io/cgit/qt/qtbase.git/tree/src/network/ssl/qsslsocket_openssl_symbols.cpp?h=v5.15.2#n683)

    tryToLoadOpenSslWin32Library(QLatin1String("libssl-1_1" QT_SSL_SUFFIX),
                                 QLatin1String("libcrypto-1_1" QT_SSL_SUFFIX), result);

It will only find v1.1.x of openssl.

[keksi venksi]

@hskoglund said in "qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed" even though SSL is installed:

Secure Socket Client Example

That example itself not working in my qt 5.14.2

[keksi venksi]

@Bonnie said in "qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed" even though SSL is installed:

tryToLoadOpenSslWin32Library

how to call this method.

its present in a private class

Please show some code to execute it

[Bonnie]

@keksi-venksi This is Qt's internal source code, you are not supposed to use it. I post it to show that it is hard coded to load openssl v1.1.x only.

[SGaist]

@keksi-venksi why did you install OpenSSL v3 since you need v1.1 ?

[Ronel_qtmaster]

@keksi-venksi you need to download openssl 1.1.1 on windows.
When done , copy libssl-1_1-x64.dll and libcrypto-1_1-x64.dll in your qt installation folder, mine is
C:\Qt\Qt5.13.2\5.13.2\mingw73_64\bin
After that it will work

[Bonnie]

@SGaist Well as I check Qt online installer only provides openssl v3 now...