self-signed ssl certificate for websocket

self-signed ssl certificate for websocket

I generated a self-signed SSL certificate for a local server test and I
have some problems for using it. My aim is to test it with a websocket
secured (wss) server.
The browsers are refusing the connection saying that the pair certificate
has an invalid signature. Firefox return this error code:
sec_error_bad_signature.
I generated the certificates and keys with the method described here (in
french but you can only look at the openssl commands):
http://www.siteduzero.com/informatique/tutoriels/securisation-d-un-chat-reseau-qt-avec-qsslsocket/ou-trouver-les-cles
Do you know how I can resolve this problem?
edit: Share certificate files
http://ant.lafarge.free.fr/FTP/index.php?url=.%2Fssl-certificate%2F