How Can I Download A Ssl Certificate To Usb Token In Qt.

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Hi all,

I am new to QT.I want to download ssl certificate and stored in usb token.I have over all basic knowledge in QT.Please provide me some sample code if possible.Please help me.

Posted 13-Nov-14 20:40pm

Member 11091184

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Jochen Arndt · Accepted Answer · 2014-11-13T22:07:00

Solution 1

Downloading SSL certificates is usually done using the OpenSSL libraries. So install these libraries and add the path and library names to the LIBS variable in your Qt project file.

You need than to create a socket, connect to the server, and call the required OpenSSL library functions. With Qt, you can use the QTcpSocket[^] class and use the member function socketDescriptor[^] to get the descriptor to be passed to the SSL functions. See http://www.zedwood.com/article/cpp-libssl-get-peer-certificate[^] on how to fetch the certificate.

How the certificate can be stored in your USB token programmatically should be documented by the manufacturer of the token.

Posted 13-Nov-14 22:07pm

Jochen Arndt

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Member 11091184 14-Nov-14 4:37am

Thanks Jochen for your reply.

I want to be more specific about my requirement. That is I want to generate a certificate request (CreatePKCS10 using xenroll or any other) to our service which then gives me the certificate in my QT application and download it to the Token through my application. I am working for a Certifying Authority which requires the application to be done in QT.

Jochen Arndt 14-Nov-14 5:24am

I'm now not really sure now where you have problems.

Qt is just a frame work. It is mainly for the GUI but provides also OS independant classes for OS specific tasks (like the mentioned network class). If the final application should not run on different OS, you can still use OS specific functions (e.g. all Windows SDK functions). Otherwise you must create OS specific code for that portions that can't be handled unique due to missing support by Qt.

[EDIT]
I just saw that you posted a new question about storing to the USB token.
You should provide more information about the used token. As already noted, the manufacturer should have some documentation. The basic question is: Uses the token a special device driver or is it a common USB device?