+ String serial = extractSerialFormCert(x509Certificate);
+ User user = fetchUserBySerial(serial);
+ if (user == null) {
+ return;
+ }
+ loginSession(req, user);
+ req.getSession().setAttribute(CERT_SERIAL, serial);
+ req.getSession().setAttribute(CERT_ISSUER, x509Certificate.getIssuerDN());
+ req.getSession().setAttribute(LOGIN_METHOD, "Certificate");
+ }
+
+ public static String extractSerialFormCert(X509Certificate x509Certificate) {
+ return x509Certificate.getSerialNumber().toString(16).toUpperCase();
+ }
+
+ public static User fetchUserBySerial(String serial) {