multi-auth: Added a couple of auth backends.

git-svn-id: http://code.djangoproject.com/svn/django/branches/multi-auth@2883 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/auth/backends.py

@@ -0,0 +1,51 @@
+from django.conf import settings
+from django.contrib.auth.models import User, check_password
+
+class SettingsBackend:
+    """
+    Authenticate against vars in settings.py Use the login name, and a hash 
+    of the password.
+    
+    ADMIN_LOGIN = 'admin'
+    ADMIN_PASSWORD = 'sha1$4e987$afbcf42e21bd417fb71db8c66b321e9fc33051de'
+    """
+    def authenticate(self, username=None, password=None):
+        login_valid = (settings.ADMIN_LOGIN == username)
+        pwd_valid = check_password(password, settings.ADMIN_PASSWORD)
+        if login_valid and pwd_valid:
+            # TODO: This should be abstracted out someplace else.
+            try:
+                user = User.objects.get(username=username)
+            except User.DoesNotExist:
+                user = User(username=username, password='')
+                user.is_staff = True
+                user.is_superuser = True
+                user.save()
+            return user
+        return None
+
+    def get_user(self, user_id):
+        try:
+            return User.objects.get(pk=user_id)
+        except User.DoesNotExist:
+            return None
+
+class ModelBackend:
+    """
+    Authenticate against django.contrib.auth.models.User
+    """
+    # TODO: Model, login attribute name and password attribute name should be
+    # configurable.
+    def authenticate(self, username=None, password=None):
+        try:
+            user = User.objects.get(username=username)
+            if user.check_password(password):
+                return user
+        except User.DoesNotExist:
+            return None
+
+    def get_user(self, user_id):
+        try:
+            return User.objects.get(pk=user_id)
+        except User.DoesNotExist:
+            return None