refactor: ECP Config schema update. Googlers see go/enterpise-cert-config (#1152)

* refactor: ECP Config schema update. Googlers see go/enterpise-cert-config

Author: clundin25

packages/google-auth/google/auth/transport/_custom_tls_signer.py

@@ -192,8 +192,8 @@ def __init__(self, enterprise_cert_file_path):
 
                     {
                         "libs": {
-                            "signer_library": "...",
-                            "offload_library": "..."
+                            "ecp_client": "...",
+                            "tls_offload": "..."
                         }
                     }
         """
@@ -206,8 +206,8 @@ def load_libraries(self):
             with open(self._enterprise_cert_file_path, "r") as f:
                 enterprise_cert_json = json.load(f)
                 libs = enterprise_cert_json["libs"]
-                signer_library = libs["signer_library"]
-                offload_library = libs["offload_library"]
+                signer_library = libs["ecp_client"]
+                offload_library = libs["tls_offload"]
         except (KeyError, ValueError) as caught_exc:
             new_exc = exceptions.MutualTLSChannelError(
                 "enterprise cert file is invalid", caught_exc

packages/google-auth/system_tests/secrets.tar.enc

@@ -1,6 +1,6 @@
 {
     "libs": {
-        "signer_library": "/path/to/signer/lib",
-        "offload_library": "/path/to/offload/lib"
+        "ecp_client": "/path/to/signer/lib",
+        "tls_offload": "/path/to/offload/lib"
     }
-}
+}