QNetworkAccessManager to a HTTPS troubles

reonZ

I am trying to connect to a secure website and am having trouble understanding the steps to get there, i think i am supposed to use QSslSocket, which i try to do, but then i get this error when i use QSslSocket::connectToHostEncrypted:

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

What am i missing ?

SGaist

Hi,

What version of Qt are you using ?
On what platform ?
With what version of OpenSSL ?

reonZ

@SGaist Qt 5.12 on windows 10 64bit, and i don't know anything about OpenSSL so that will be most likely what i am missing, Could you elaborate on how to use it ?

SGaist

Here you have the starting point.

reonZ

@SGaist I am not sure i understand, do i need to build my own Qt ? i have never done that.

JKSH

@reonZ said in QNetworkAccessManager to a HTTPS troubles:

do i need to build my own Qt ?,

No need to build Qt; you just need to install OpenSSL and add it to your PATH.

The bitness of OpenSSL must match the bitness of your Qt libraries (so if you use 32-bit Qt, install 32-bit OpenSSL). Qt 5.12 uses OpenSSL 1.1.0.

reonZ

@JKSH I am really sorry to be asking that but this is far beyond my expertise, i just installed OpenSSL 1.1.0j and added INCLUDEPATH += C:/OpenSSL-Win64/include in my .pro, but now what ? i have no idea how i am supposed to use it.

JKSH

Hi @reonZ, no apology required :)

@reonZ said in QNetworkAccessManager to a HTTPS troubles:

i just installed OpenSSL 1.1.0j

Good.

and added INCLUDEPATH += C:/OpenSSL-Win64/include in my .pro, but now what ? i have no idea how i am supposed to use it.

I meant your PATH environment variable, not your project INCLUDEPATH. See https://helpdeskgeek.com/windows-10/add-windows-path-environment-variable/ and add the folder that contains the OpenSSL DLLs (not the include folder).

You don't need to do anything else. Just run your Qt program. It will search for the OpenSSL DLL in your PATH and load it automatically.

Anyway, I notice that you've installed 64-bit OpenSSL, which will only work with 64-bit apps. Are you using 64-bit Qt or 32-bit Qt?

reonZ

@JKSH I did put it in my windows PATH, tried both the C:\OpenSSL-Win32\bin and C:\OpenSSL-Win64\bin version just in case and i still have the same error (i restarted Qt each time).

JKSH

@reonZ said in QNetworkAccessManager to a HTTPS troubles:

I did put it in my windows PATH, tried both the C:\OpenSSL-Win32\bin and C:\OpenSSL-Win64\bin version just in case and i still have the same error

Are you using 32-bit or 64-bit Qt?
Where did you download OpenSSL from?
What does QSslSocket::sslLibraryBuildVersionString() return?
What does QSslSocket::sslLibraryVersionString() return?

(i restarted Qt each time).

I'm not 100% sure, but you'll also need to make sure that Windows has recorded the changes. Did you close all the Windows dialogs after changing the settings?

kshegunov

Relevant bugreports:
https://bugreports.qt.io/browse/QTBUG-72015
https://bugreports.qt.io/browse/QTBUG-72016

Basically you can get that if you have misconfigured the socket - no private key, or local certificate. The error is nondescriptive, so you need to make sure (if you use any of those two) that both exist and are valid, and you do that manually. Could you provide the snippet you use to connect to said server?

reonZ

@JKSH

1/ In Qt creator it says Based on Qt 5.12.0 (MVSC 2015, 32 bit)
2/ From here http://slproweb.com/products/Win32OpenSSL.html
3/ QSslSocket::sslLibraryBuildVersionString() returns OpenSSL 1.0.2p 14 Aug 2018
4/ QSslSocket::sslLibraryVersionString() returns empty

And yes, i made sure to close all the dialog windows before restarting Qt.

reonZ

@kshegunov My test code is pretty bare right now, i just wanted to see how it worked first, it is just a simple QNetworkAccessManager::get on https://www.google.com.

kshegunov

It works yes, if it's configured properly. However: QSslSocket::sslLibraryVersionString() shouldn't return empty. I'd guess Qt can't find to load your openssl library.

SGaist

Hi,

Following item 3, Qt was built using OpenSSL 1.0.2 so you have to download the most recent version of the 1.0 series of OpenSSL. You can't use 1.1 in this case because they broke API and ABI compatibility.

reonZ

@SGaist Installed 1.0.2q and still the same, QSslSocket::sslLibraryVersionString() returns empty. I am loosing hope :(

SGaist

Go to the Run part of the Project panel and modify the PATH environment variable there to also contain the path to your 1.0 version of OpenSSL dlls.

reonZ

@SGaist Sadly it is already there, even twice for some reason.

SGaist

Then I would ensure that this folder is the first to appear in the list and also that there are no other versions of OpenSSL on the system, for example in the Windows specific folders.

reonZ

@SGaist Alright it is working now, i indeed needed to install the 64bit version and not the 32 bit:

QSslSocket::sslLibraryBuildVersionString()   "OpenSSL 1.0.2p  14 Aug 2018"
QSslSocket::sslLibraryVersionString()        "OpenSSL 1.0.2q  20 Nov 2018"

I also received the result from QNetworkAccessManager::get

Thanks a lot for all the help, you guys are awesome.

Edit: i still always have this in the output console though QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once but it is not related to this because i had it on non secure get too.