Refactor certificate decoding in app.py

app.py

@@ -8,7 +8,10 @@ def decode(cert) -> dict:
     cert = cert.encode()
     ssl_out = {}
     try:
-        decoded_cert = x509.load_pem_x509_certificate(cert, default_backend())
+        try:
+            decoded_cert = x509.load_pem_x509_certificate(cert, default_backend())
+        except:
+            decoded_cert = x509.load_pem_x509_csr(cert, default_backend())
         if decoded_cert:
             status = "Success"
             message = "Certificate decoded successfully."