#30226: Add base authentication backend to ease custom backend creation.
---------------------------------+------------------------------------
     Reporter:  Tobias Bengfort  |                    Owner:  nobody
         Type:  New feature      |                   Status:  new
    Component:  contrib.auth     |                  Version:  master
     Severity:  Normal           |               Resolution:
     Keywords:                   |             Triage Stage:  Accepted
    Has patch:  1                |      Needs documentation:  0
  Needs tests:  0                |  Patch needs improvement:  0
Easy pickings:  0                |                    UI/UX:  0
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Description changed by Tobias Bengfort:

Old description:

> Currently, writing a new authentication backend requires quite some
> boilerplate e.g. `has_perm()` can be derived from `get_all_permissions()`
> which in turn can be derived from `get_user_permissions()` and
> `get_group_permissions()`. Additionally, `authenticate()` and
> `get_user()` should always return `None` for backends that only handle
> permissions.
>
> Also note that `get_all_permissions()` and `get_group_permissions()`
> exist on the User model, but `get_user_permissions()` does not. I think
> this is confisuing for backend authors.
>
> Mailinglist thread: https://groups.google.com/forum/#!topic/django-
> developers/CNmz22gEsCc
> Pull request: https://github.com/django/django/pull/11037

New description:

 Currently, writing a new authentication backend requires quite some
 boilerplate e.g. `has_perm()` can be derived from `get_all_permissions()`
 which in turn can be derived from `get_user_permissions()` and
 `get_group_permissions()`. Additionally, `authenticate()` and `get_user()`
 should always return `None` for backends that only handle permissions.

 Also note that `get_all_permissions()` and `get_group_permissions()` exist
 on the User model, but `get_user_permissions()` does not. I think this is
 confusing for backend authors.

 Mailinglist thread: https://groups.google.com/forum/#!topic/django-
 developers/CNmz22gEsCc
 Pull request: https://github.com/django/django/pull/11037

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Ticket URL: <https://code.djangoproject.com/ticket/30226#comment:5>
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