[Qt-interest] Qt 4.7, windows and openssl

[Cédric Pessan]

Hi,

I am currently struggling to make an existing cryptographic module working
within a QT application. This module is pure C/C++ and only uses openssl. I
can't really change its behavior as it has to work with an existing server,
so i have to stick to its specifications. On linux and macosx, i had no
problem getting it to work. But on windows, that's a whole different story
:-(

Maybe i've done something wrong when linking my project. I'm using cmake to
build it, and linked it with mingw openssl version provided on this page:
http://www.slproweb.com/products/Win32OpenSSL.html. Here's what happen:
- if i use the application without the cryptographic module, it works
- if i use the cryptographic module alone, it works.
- if i use the cyrptographic module alone and i initialise my QApplication
it crashes badly and there is no way in the debugger to understand where
(looks like it crashes in windows dll and the displayed stack is not
useful).

It looks like as soon as i use QT and some ssl functions, it crashes.

Is it a known problem ? is there an easy workaround ?

I thought about rewriting the classes using only QT and SSL functionalities
in QT but it looks like not all functions i need exists in QT. For example,
i can't find a cryptographically secure random such as RAND_bytes in QT (or
i missed it ?)

I hope someone understand what the problem is.

Thanks for your help

Cédric
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