Bugfix

pymysql/connections.py

@@ -286,8 +286,6 @@ def _config(key, arg):
                     ssl["ca"] = ssl_ca
                 elif ssl_cadata is not None:
                     ssl["cadata"] = ssl_cadata
-                else:
-                    raise ValueError("ssl_ca or ssl_catada must be provided")
                 if ssl_cert is not None:
                     ssl["cert"] = ssl_cert
                 if ssl_key is not None:
@@ -380,7 +378,7 @@ def _create_ssl_ctx(self, sslp):
         ca = sslp.get("ca")
         cadata = sslp.get("cadata")
         capath = sslp.get("capath")
-        hasnoca = (ca is None or cadata is None) and capath is None
+        hasnoca = ca is None and cadata is None and capath is None
         ctx = ssl.create_default_context(cafile=ca, capath=capath, cadata=cadata)
         ctx.check_hostname = not hasnoca and sslp.get("check_hostname", True)
         verify_mode_value = sslp.get("verify_mode")