使用QSslSocket时未解决的函数

Question

I tried to run a simple program that is written with Qt and QSslSocket is used in. I'm running this program on a Ubuntu 12.04 machine with OpenSSL installed . But I got the following errors:

QSslSocket: cannot call unresolved function SSLv3_client_method
QSslSocket: cannot call unresolved function SSL_CTX_new
QSslSocket: cannot call unresolved function SSL_library_init
QSslSocket: cannot call unresolved function ERR_get_error

How can I fix these errors ?

Answer 1

On Windows/MinGW you need to copy these files to your exe directory.

C:\Qt\Tools\mingw492_32\opt\bin\libeay32.dll
C:\Qt\Tools\mingw492_32\opt\bin\ssleay32.dll

Or you can copy them to C:\\Qt\\Tools\\mingw492_32\\bin if you want it to work with all your apps. Obviously you need to distribute them with your program.

You actually don't need to add QT += network .

Answer 2

Install the latest openSSL version. yum install openssl , yum install libssl-dev. .

And add QT += network in your .pro file

Source: http://codeblog.vurdalakov.net/2009/11/solution-qsslsocket-cannot-call.html

Answer 3

I had the same problem with QT 5.0.1 and QT 5.1.1, and finally I realized I need to copy OpenSSL DLL files next to the application binary file. For some reason QT do not load the DLL files from Windows Path ...

I've used OpenSSL Win32 0_9_8y

Answer 4

For Ubuntu or (Debian based Linux) install openssl and libssl-dev

ie sudo apt-get install openssl libssl-dev .

For Red Hat , Fedora , CentOS (rpm based linux) install openssl and openssl-devel

ie yum install openssl openssl-devel

Answer 5

You need to include this file:

 #include <QtNetwork>

And in your .pro file, add this line:

 QT += network

Answer 6

我将OpenSSL降级到版本1.0并且有效。

Answer 7

在debian上安装lua-openssl软件包似乎已经为我解决了这个问题。