Previously, when logging out, the existing session was overwritten by a
new sessionid instead of deleting the session altogether.
This behavior added overhead by creating a new session record in
whichever backend was in use: db, cache, etc.
This extra session is unnecessary at the time since no session data is
meant to be preserved when explicitly logging out.
Added settings.SESSION_SERIALIZER which is the import path of a serializer
to use for sessions.
Thanks apollo13, carljm, shaib, akaariai, charettes, and dstufft for reviews.
SuspiciousOperations have been differentiated into subclasses, and
are now logged to a 'django.security.*' logger. SuspiciousOperations
that reach django.core.handlers.base.BaseHandler will now return a 400
instead of a 500.
Thanks to tiwoc for the report, and Carl Meyer and Donald Stufft
for review.
* Prevented stale session files from being loaded
* Added removal of stale session files in django-admin.py clearsessions
Thanks ej for the report, crodjer and Elvard for their inputs.
This change allows for cleaner tests: we can test the exact output.
Refs #18194: this change makes it possible to compute session expiry
dates at times other than when the session is saved.
Fixed#18458: the existence of the `modification` kwarg implies that you
must pass it to get_expiry_age/date if you call these functions outside
of a short request - response cycle (the intended use case).
Removes several ad hoc implementations of get_random_string()
and removes an innapropriate use of settings.SECRET_KEY.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17580 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This also removes the implicit initialization of the session key on the first access in favor of explicit initialization.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17155 bcc190cf-cafb-0310-a4f2-bffc1f526a37
All adhoc MAC applications have been updated to use HMAC, using SHA1 to
generate unique keys for each application based on the SECRET_KEY, which is
common practice for this situation. In all cases, backwards compatibility
with existing hashes has been maintained, aiming to phase this out as per
the normal deprecation process. In this way, under most normal
circumstances the old hashes will have expired (e.g. by session expiration
etc.) before they become invalid.
In the case of the messages framework and the cookie backend, which was
already using HMAC, there is the possibility of a backwards incompatibility
if the SECRET_KEY is shorter than the default 50 bytes, but the low
likelihood and low impact meant compatibility code was not worth it.
All known instances where tokens/hashes were compared using simple string
equality, which could potentially open timing based attacks, have also been
fixed using a constant-time comparison function.
There are no known practical attacks against the existing implementations,
so these security improvements will not be backported.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@14218 bcc190cf-cafb-0310-a4f2-bffc1f526a37
sesssion. This means the user will see their session preserved across a login
boundary, but somebody snooping the anonymous session key won't be able to view
the authenticated session data.
This is the final piece of the session key handling changes.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8459 bcc190cf-cafb-0310-a4f2-bffc1f526a37
a cookie) with no corresponding entry in the database.
This only affected the database backend, but I've applied the same fix to all
three backends for robustness.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8351 bcc190cf-cafb-0310-a4f2-bffc1f526a37
regenerates the key. Used to ensure the caller gets a fresh session at logout,
for example.
Based on a patch from mrts. Refs #7515.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8342 bcc190cf-cafb-0310-a4f2-bffc1f526a37
incompatible for custom session backends.
Whilst we were in the neighbourhood, use a larger range of session key values
to save a small amount of time and use the hardware-base random numbers where
available (transparently falls back to pseudo-RNG otherwise).
Fixed#1080
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8340 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Matt Robenolt
Berker Peksag
Alex Gaynor
Gregor MacGregor
Tim Graham
Preston Holmes
Aymeric Augustin
Claude Paroz
Paul McMillan
Jannis Leidel
Luke Plant
Adrian Holovaty
Malcolm Tredinnick
Gary Wilson Jr
Russell Keith-Magee
Jacob Kaplan-Moss