Fixed safe.py for pytorch 1.13 ckpt files

modules/safe.py

@@ -62,14 +62,12 @@ class RestrictedUnpickler(pickle.Unpickler):
         raise Exception(f"global '{module}/{name}' is forbidden")
 
 
-allowed_zip_names = ["archive/data.pkl", "archive/version"]
-allowed_zip_names_re = re.compile(r"^archive/data/\d+$")
-
+# Regular expression that accepts 'dirname/version', 'dirname/data.pkl', and 'dirname/data/<number>'
+allowed_zip_names_re = re.compile(r"^([^/]+)/((data/\d+)|version|(data\.pkl))$")
+data_pkl_re = re.compile(r"^([^/]+)/data\.pkl$")
 
 def check_zip_filenames(filename, names):
     for name in names:
-        if name in allowed_zip_names:
-            continue
         if allowed_zip_names_re.match(name):
             continue
 
@@ -82,8 +80,14 @@ def check_pt(filename, extra_handler):
         # new pytorch format is a zip file
         with zipfile.ZipFile(filename) as z:
             check_zip_filenames(filename, z.namelist())
-
-            with z.open('archive/data.pkl') as file:
+            
+            # find filename of data.pkl in zip file: '<directory name>/data.pkl'
+            data_pkl_filenames = [f for f in z.namelist() if data_pkl_re.match(f)]
+            if len(data_pkl_filenames) == 0:
+                raise Exception(f"data.pkl not found in {filename}")
+            if len(data_pkl_filenames) > 1:
+                raise Exception(f"Multiple data.pkl found in {filename}")
+            with z.open(data_pkl_filenames[0]) as file:
                 unpickler = RestrictedUnpickler(file)
                 unpickler.extra_handler = extra_handler
                 unpickler.load()