Testing if a client certificat is installed in the client browser

hoangsts

New Member
I was wondering if any of you know if it is possible in javascript or php to test if a client has a specific client certificate installed in the browser.The thing is that we have a server certificate installed but to be recognized by the clients, they need 2 client certificates that make them recognize the authority of the issuer of our server certificate. We would like to test the browser for these 2 certificates, if there are not there, we want to propose the client to download them before to enter in https mode...Anybody can help? Please detail your answer if you know one.
 
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