Fixed #28401 -- Allowed hashlib.md5() calls to work with FIPS kernels.

md5 is not an approved algorithm in FIPS mode, and trying to instantiate
a hashlib.md5() will fail when the system is running in FIPS mode.

md5 is allowed when in a non-security context. There is a plan to add a
keyword parameter (usedforsecurity) to hashlib.md5() to annotate whether
or not the instance is being used in a security context.

In the case where it is not, the instantiation of md5 will be allowed.
See https://bugs.python.org/issue9216 for more details.

Some downstream python versions already support this parameter. To
support these versions, a new encapsulation of md5() has been added.
This encapsulation will pass through the usedforsecurity parameter in
the case where the parameter is supported, and strip it if it is not.

Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/django/contrib/staticfiles/storage.py b/django/contrib/staticfiles/storage.py
index 7cf43ed6ab..5fa088a29a 100644
--- a/django/contrib/staticfiles/storage.py
+++ b/django/contrib/staticfiles/storage.py
@@ -1,4 +1,3 @@
-import hashlib
 import json
 import os
 import posixpath
@@ -10,6 +9,7 @@ from django.contrib.staticfiles.utils import check_settings, matches_patterns
 from django.core.exceptions import ImproperlyConfigured
 from django.core.files.base import ContentFile
 from django.core.files.storage import FileSystemStorage, get_storage_class
+from django.utils.crypto import md5
 from django.utils.functional import LazyObject
 
 
@@ -89,10 +89,10 @@ class HashedFilesMixin:
         """
         if content is None:
             return None
-        md5 = hashlib.md5()
+        hasher = md5(usedforsecurity=False)
         for chunk in content.chunks():
-            md5.update(chunk)
-        return md5.hexdigest()[:12]
+            hasher.update(chunk)
+        return hasher.hexdigest()[:12]
 
     def hashed_name(self, name, content=None, filename=None):
         # `filename` is the name of file to hash if `content` isn't given.