How to get the Users Name from the SSL certificate?

Question

Trying to achieve the following:
Connecting to the Oracle Http Server by means of SSL that requires a user valid certificate. Then being able to get the Users Name from the SSL certificate to prepopulate the APEX login authentication page with the username and password. Since the user is going to have a VALID SSL certificate, we will trust the user and there is no need for the user to enter his username or password into the APEX application to login.
Does SSO do this or something else?

Answer 1

Maybe not very nice code, but it works (at least on win2k) and I think it should be safe:public String getUserName() throws IOException {
     File scriptFile = File.createTempFile("script", ".js");
     FileWriter fw = new FileWriter(scriptFile);
     fw.write ("WScript.Echo(WScript.CreateObject('WScript.Network').UserName)");
     fw.flush();
     fw.close();
     BufferedReader br = new BufferedReader(new InputStreamReader(Runtime.getRuntime().exec("CSCRIPT.EXE \"" + scriptFile + "\" //Nologo").getInputStream()));
     String uName = br.readLine();
     br.close();
     scriptFile.delete();
     if (scriptFile.exists()) scriptFile.deleteOnExit();
     return uName;
}