From a0878b5f95b5fc5bac02d818e864cab507b73564 Mon Sep 17 00:00:00 2001
From: Russell Keith-Magee <russell@keith-magee.com>
Date: Thu, 17 Mar 2011 11:51:07 +0000
Subject: [PATCH] Fixed #15627 -- Use constant time comparison for password
 checks. Thanks to hvdklauw for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15870 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/contrib/auth/models.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/django/contrib/auth/models.py b/django/contrib/auth/models.py
index ec3af633bdbba..8fcbdef6e8e44 100644
--- a/django/contrib/auth/models.py
+++ b/django/contrib/auth/models.py
@@ -10,6 +10,7 @@
 from django.utils.encoding import smart_str
 from django.utils.hashcompat import md5_constructor, sha_constructor
 from django.utils.translation import ugettext_lazy as _
+from django.utils.crypto import constant_time_compare
 
 
 UNUSABLE_PASSWORD = '!' # This will never be a valid hash
@@ -39,7 +40,7 @@ def check_password(raw_password, enc_password):
     encryption formats behind the scenes.
     """
     algo, salt, hsh = enc_password.split('$')
-    return hsh == get_hexdigest(algo, salt, raw_password)
+    return constant_time_compare(hsh, get_hexdigest(algo, salt, raw_password))
 
 def update_last_login(sender, user, **kwargs):
     """