Using QSslSocket with custom OpenSSL

MChelik · 14 Sept 2016, 17:11

@VRonin Yes, there is libcrypto-1_1-x64.dll and libssl-1_1-x64.dll in it.

raven-worx · 14 Sept 2016, 18:40

@MChelik
on windows they are called ssleay32.dll and libeay32.dll

MChelik · 15 Sept 2016, 05:52

@raven-worx Since QSslSocket::sslLibraryBuildVersionString() returns "OpenSSL 1.0.2g 1 Mar 2016", I downloaded OpenSSL_1.0.2g source code and compiled it, but inside bin directory there was only openssl.exe. So I copied ssleay32.dll and libeay32.dll from C:\Qt\Tools\QtCreator\bin to C:\Windows. But still I get same error, nothing changed.
What should I do use QSslSocket? I'm really confused. I searched a lot but nothing helped.

SGaist · wrote on 14 Sept 2016, 21:01

Hi and welcome to devnet,

Don't copy .dlls like that in the Windows folder, that's very bad practice.

If Qt shows you a different version of OpenSSL, it likely means that you have an application that also provides these files and can be found before yours.

I've successfully used the prebuilt packages from Shining Lights Production.

Hope it helps

raven-worx · wrote on 15 Sept 2016, 05:52

@MChelik said in Using QSslSocket with custom OpenSSL:

So I copied ssleay32.dll and libeay32.dll from C:\Qt\Tools\QtCreator\bin to C:\Windows

don't do that, as @SGaist said. Copy them next to your application exe instead.

MChelik · wrote on 16 Sept 2016, 00:21

Thank you SGaist. Copying next to application executable didn't help either.
Gentlemen, let's forget my OpenSSL; forget everything. Just assume that I want to use QSslSocket and QSslCertificate. What should I do? Should I compile Qt myself? Should I install OpenSSL? What should I do exactly? Qt documents doesn't say any specific thing about this. Documents say only how to use mentioned two classes.
Thank you

hskoglund · wrote on 16 Sept 2016, 01:06

Hi, just a quick note on OpenSSL with Qt, I think because you're building a 64-bit Qt app that's why you're having problems. Because those 2 DLLs s stored in C:\Qt\Tools\QtCreator\bin are built with MSVC2013 32-bit compiler (same as for Qt Creator itself) so they are not kosher for 64-bit :-(

SGaist · wrote on 16 Sept 2016, 07:33

To add to @hskoglund, the prebuilt packages I've mentioned earlier also provide "OpenSSL-Win64" which are pre-built for 64bit development.

MChelik · wrote on 17 Sept 2016, 23:51

@hskoglund That was my problem! I didn't pay attention to that. But I a have a question: The only libeay32.dll and ssleay32.dll files that are in my %PATH% is C:\Win64-OpenSSL\bin directory. So why my application only works when mentioned DLLs are beside my application (doesn't work when are in %PATH)?

SGaist · 19 Sept 2016, 21:08

Are you sure you don't have any other application that has these libraries and that can be found in your PATH environment variable ?

MChelik · S SGaist 18 Sept 2016, 20:03

@SGaist No, I searched my whole disk for these DLLs. Every directory that contains these DLLs is not in %PATH.

SGaist · 22 Sept 2016, 23:57

How did you modify PATH ? In your Windows settings or in Qt Creator ?

hskoglund · wrote on 19 Sept 2016, 22:04

Hi, also, they could be loaded via some other means than their directories being listed in %PATH%, either that some other dll that your .exe loads explicitly pulls in the bad (i.e. 32-bit) ones, or perhaps they're hiding in c:\windows or c:\windows\system32.

To debug this. you could try download Dependency Walker and load your app into it. Then start profiling with F7, that'll get you a trace of all the dlls loaded.

Nalnalital · 20 Sept 2016, 15:12

This post is deleted!

Nalnalital · wrote on 20 Sept 2016, 15:12

This post is deleted!

Nalnalital · wrote on 20 Sept 2016, 15:57

Using Qt5.7+msvc2015+W8

Solved, in Qt_naming dll respect, without openssl compilation :
http://www.npcglib.org/~stathis/downloads/openssl-1.0.1t-vs2015.7z

MChelik · S SGaist 19 Sept 2016, 21:57

@SGaist I modified it via Windows settings and I don't know even khow how to change %PATH in Qt. Can you tell me? ( ͡° ͜ʖ ͡°)
@hskoglund I'll try it at work. Thank you for your solution.

SGaist · wrote on 23 Sept 2016, 07:03

Not in Qt but within Qt Creator. Go to the Run part of the Project panel. There you can modify your environment for your application only.

RMcFatter · wrote on 28 Oct 2016, 14:30

@raven-worx Not any more. As of OpenSSL 1.1.0, following OpenSSL's build instructions on Windows (and with shared libraries enabled), we get:

bin/libcrypto-1_1.dll
bin/libssl-1_1.dll
lib/libcrypto.lib
lib/libssl.lib

The names "ssleay32" and "libeay32" were deprecated. So does Qt only look for the old names despite any attempts at configuring it otherwise?

Qt's docs on the topic, for some reason, only describe building OpenSSL for Android.

SGaist · wrote on 28 Oct 2016, 19:26

@RMcFatter
Hi and welcome to devnet,

From a quick look at Qt's sources, it doesn't search yet for libcrypto/ssl-1_1.

That something you should check in the bug report system to see if there's already something planned for that.