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SSL Client Key Exchange phase problem

Posted: 03/31/2014 05:38:12
by Michal Kreidl (Standard support level)
Joined: 11/21/2011
Posts: 4

I have a strange problem with SSL handshake. My client application periodically connects to the server with both server and client certificates. It always sends and receives a small amount of user data after successful connection and disconnects. There are still the same conditions and constant period (usually 60s but the problem doesn't depend on it). And sometime connection fails, irregularly, sometime once after 10 periods, sometime after 200 periods. And the next connection is successful again. I've taken some snapshots of the TCP communication and I've found this: The handshake always goes by the same way until Client Key Exchange phase. Sometime client sends only zeros in this packet. Server then stop the handshake. As the first I checked if the SecureClient OnSend event really gives this wrong data. And it does. I haven't any idea where to look for a bug.

Thank you very much for any help.

ActiveX SecureBlackBox SecureClient, tested on Windows Vista/7/2008 srv

Posted: 03/31/2014 05:42:26
by Eugene Mayevski (Team)

Moved to Helpdesk.

Sincerely yours
Eugene Mayevski



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