eToken - Using Digital Signature in PHP form

We are looking for following module to be built using Java Applet and PHP User will plugin his digital signature etoken in his PC (client machine). Open the form page and fill details in it. On the browser the java applet will sign the data entered on the form using private key of the client's digital signature which is present in client's etoken. At server side PHP application is running which will verify the signature and collect the data if signature is verified (public key should be stored in database for signature verification)