Extract file checking activities

monkey/monkey_island/cc/services/utils/file_handling.py

@@ -0,0 +1,22 @@
+import os
+
+from common.utils.exceptions import InsecurePermissionsError
+
+
+def ensure_file_existence(file: str) -> None:
+    if not os.path.exists(file):
+        raise FileNotFoundError(f"File not found at {file}. Exiting.")
+
+
+def ensure_file_permissions(file: str) -> None:
+    if not file_has_sufficient_permissions(path=file, required_permissions="0o400"):
+        raise InsecurePermissionsError(
+            f"{file} has insecure permissions. Required permissions: r--------. Exiting."
+        )
+
+
+def file_has_sufficient_permissions(path: str, required_permissions: str) -> bool:
+    file_mode = os.stat(path).st_mode
+    file_permissions = oct(file_mode & 0o777)
+
+    return file_permissions == required_permissions

monkey/monkey_island/cc/services/utils/file_permissions.py

@@ -1,8 +0,0 @@
-import os
-
-
-def has_sufficient_permissions(path: str, required_permissions: str) -> bool:
-    file_mode = os.stat(path).st_mode
-    file_permissions = oct(file_mode & 0o777)
-
-    return file_permissions == required_permissions

monkey/monkey_island/cc/setup/certificate/certificate_setup.py

@@ -1,8 +1,9 @@
 import logging
-import os
 
-from common.utils.exceptions import InsecurePermissionsError
-from monkey_island.cc.services.utils.file_permissions import has_sufficient_permissions
+from monkey_island.cc.services.utils.file_handling import (
+    ensure_file_existence,
+    ensure_file_permissions,
+)
 from monkey_island.cc.setup.island_config_options import IslandConfigOptions
 
 logger = logging.getLogger(__name__)
@@ -12,15 +13,9 @@ def setup_certificate(config_options: IslandConfigOptions) -> (str, str):
     crt_path = config_options.crt_path
     key_path = config_options.key_path
 
-    # check paths
     for file in [crt_path, key_path]:
-        if not os.path.exists(file):
-            raise FileNotFoundError(f"File not found at {file}. Exiting.")
-
-        if not has_sufficient_permissions(path=file, required_permissions="0o400"):
-            raise InsecurePermissionsError(
-                f"{file} has insecure permissions. Required permissions: r--------. Exiting."
-            )
+        ensure_file_existence(file)
+        ensure_file_permissions(file)
 
     logger.info(f"Using certificate path: {crt_path}, and key path: {key_path}.")