ACL filters are no more LDAP filters but user attribute mappings.

CHANGES.rst

@@ -13,6 +13,7 @@ Changed
 - Moved OIDC related configuration entries in ``OIDC``
 - Moved ``LDAP`` configuration entry to ``BACKENDS.LDAP``
 - Bumped to htmx 1.9.0 :pr:`124`
+- ACL filters are no more LDAP filters but user attribute mappings. :pr:`125`
 
 Fixed
 *****

canaille/conf/config.sample.toml

@@ -91,18 +91,25 @@ GROUP_BASE = "ou=groups,dc=mydomain,dc=tld"
 # A 'user' variable is available.
 # GROUP_USER_FILTER = "member={user.dn}"
 
+[ACL]
 # You can define access controls that define what users can do on canaille
 # An access control consists in a FILTER to match users, a list of PERMISSIONS
 # matched users will be able to perform, and fields users will be able
 # to READ and WRITE. Users matching several filters will cumulate permissions.
 #
-# A 'FILTER' parameter that is a LDAP filter used to determine if a user
-# belongs to an access control. If absent, all the users will match this
-# access control. If your LDAP server has the 'memberof' overlay, you can
-# filter against group membership.
+# 'FILTER' parameter can be:
+# - absent, in which case all the users will match this access control
+# - a mapping where keys are user attributes name and the values those user
+#   attribute values. All the values must be matched for the user to be part
+#   of the access control.
+# - a list of those mappings. If a user values match at least one mapping,
+#   then the user will be part of the access control
+#
 # Here are some examples
-#     FILTER = 'uid=admin'
-#     FILTER = 'memberof=cn=admins,ou=groups,dc=mydomain,dc=tld'
+#     FILTER = {'user_name': 'admin'}
+#     FILTER =
+#       - {'groups': 'admin'}
+#       - {'groups': 'moderators'}
 #
 # The 'PERMISSIONS' parameter that is an list of items the users in the access
 # control will be able to manage. 'PERMISSIONS' is optionnal. Values can be:
@@ -142,7 +149,7 @@ WRITE = [
 ]
 
 [ACL.ADMIN]
-FILTER = "memberof=cn=moderators,ou=groups,dc=mydomain,dc=tld"
+FILTER = {"groups": "admins"}
 PERMISSIONS = [
     "manage_users",
     "manage_groups",

canaille/core/models.py

@@ -63,6 +63,27 @@ class User(LDAPObject):
 
         return user
 
+    @classmethod
+    def acl_filter_to_ldap_filter(cls, filter_):
+        if isinstance(filter_, dict):
+            return (
+                "(&"
+                + "".join(
+                    f"({cls.attribute_table.get(key, key)}={value})"
+                    for key, value in filter_.items()
+                )
+                + ")"
+            )
+
+        if isinstance(filter_, list):
+            return (
+                "(|"
+                + "".join(cls.acl_filter_to_ldap_filter(mapping) for mapping in filter_)
+                + ")"
+            )
+
+        return filter_
+
     def load_groups(self):
         group_filter = (
             current_app.config["BACKENDS"]["LDAP"]
@@ -159,9 +180,9 @@ class User(LDAPObject):
         conn = self.ldap_connection()
 
         for access_group_name, details in current_app.config["ACL"].items():
-            if not details.get("FILTER") or (
-                self.id
-                and conn.search_s(self.id, ldap.SCOPE_SUBTREE, details["FILTER"])
+            filter_ = self.acl_filter_to_ldap_filter(details.get("FILTER"))
+            if not filter_ or (
+                self.id and conn.search_s(self.id, ldap.SCOPE_SUBTREE, filter_)
             ):
                 self.permissions |= set(details.get("PERMISSIONS", []))
                 self.read |= set(details.get("READ", []))

demo/conf-docker/canaille.toml

@@ -92,18 +92,25 @@ GROUP_BASE = "ou=groups,dc=mydomain,dc=tld"
 # A 'user' variable is available.
 # GROUP_USER_FILTER = "member={user.dn}"
 
+[ACL]
 # You can define access controls that define what users can do on canaille
 # An access control consists in a FILTER to match users, a list of PERMISSIONS
 # matched users will be able to perform, and fields users will be able
 # to READ and WRITE. Users matching several filters will cumulate permissions.
 #
-# A 'FILTER' parameter that is a LDAP filter used to determine if a user
-# belongs to an access control. If absent, all the users will match this
-# access control. If your LDAP server has the 'memberof' overlay, you can
-# filter against group membership.
+# 'FILTER' parameter can be:
+# - absent, in which case all the users will match this access control
+# - a mapping where keys are user attributes name and the values those user
+#   attribute values. All the values must be matched for the user to be part
+#   of the access control.
+# - a list of those mappings. If a user values match at least one mapping,
+#   then the user will be part of the access control
+#
 # Here are some examples
-#     FILTER = 'uid=admin'
-#     FILTER = 'memberof=cn=admins,ou=groups,dc=mydomain,dc=tld'
+#     FILTER = {'user_name': 'admin'}
+#     FILTER =
+#       - {'groups': 'admin'}
+#       - {'groups': 'moderators'}
 #
 # The 'PERMISSIONS' parameter that is an list of items the users in the access
 # control will be able to manage. 'PERMISSIONS' is optionnal. Values can be:
@@ -143,7 +150,7 @@ WRITE = [
 ]
 
 [ACL.ADMIN]
-FILTER = "memberof=cn=admins,ou=groups,dc=mydomain,dc=tld"
+FILTER = {"groups": "admins"}
 PERMISSIONS = [
     "manage_users",
     "manage_groups",
@@ -154,7 +161,7 @@ PERMISSIONS = [
 WRITE = ["groups"]
 
 [ACL.HALF_ADMIN]
-FILTER = "memberof=cn=moderators,ou=groups,dc=mydomain,dc=tld"
+FILTER = {"groups": "moderators"}
 PERMISSIONS = ["manage_users", "manage_groups", "delete_account"]
 WRITE = ["groups"]
 

demo/conf/canaille.toml

@@ -92,18 +92,25 @@ GROUP_BASE = "ou=groups,dc=mydomain,dc=tld"
 # A 'user' variable is available.
 # GROUP_USER_FILTER = "member={user.dn}"
 
+[ACL]
 # You can define access controls that define what users can do on canaille
 # An access control consists in a FILTER to match users, a list of PERMISSIONS
 # matched users will be able to perform, and fields users will be able
 # to READ and WRITE. Users matching several filters will cumulate permissions.
 #
-# A 'FILTER' parameter that is a LDAP filter used to determine if a user
-# belongs to an access control. If absent, all the users will match this
-# access control. If your LDAP server has the 'memberof' overlay, you can
-# filter against group membership.
+# 'FILTER' parameter can be:
+# - absent, in which case all the users will match this access control
+# - a mapping where keys are user attributes name and the values those user
+#   attribute values. All the values must be matched for the user to be part
+#   of the access control.
+# - a list of those mappings. If a user values match at least one mapping,
+#   then the user will be part of the access control
+#
 # Here are some examples
-#     FILTER = 'uid=admin'
-#     FILTER = 'memberof=cn=admins,ou=groups,dc=mydomain,dc=tld'
+#     FILTER = {'user_name': 'admin'}
+#     FILTER =
+#       - {'groups': 'admin'}
+#       - {'groups': 'moderators'}
 #
 # The 'PERMISSIONS' parameter that is an list of items the users in the access
 # control will be able to manage. 'PERMISSIONS' is optionnal. Values can be:
@@ -143,7 +150,7 @@ WRITE = [
 ]
 
 [ACL.ADMIN]
-FILTER = "memberof=cn=admins,ou=groups,dc=mydomain,dc=tld"
+FILTER = {"groups": "admins"}
 PERMISSIONS = [
     "manage_users",
     "manage_groups",
@@ -154,7 +161,7 @@ PERMISSIONS = [
 WRITE = ["groups"]
 
 [ACL.HALF_ADMIN]
-FILTER = "memberof=cn=moderators,ou=groups,dc=mydomain,dc=tld"
+FILTER = {"groups": "moderators"}
 PERMISSIONS = ["manage_users", "manage_groups", "delete_account"]
 WRITE = ["groups"]
 

doc/configuration.rst

@@ -132,9 +132,19 @@ The 'READ' and 'WRITE' attributes are the LDAP attributes of the user
 object that users will be able to read and/or write.
 
 :FILTER:
-    *Optional.* A filter to test on the users to test if they belong to this ACL.
-    If absent, all the users will have the permissions in this ACL.
-    e.g. ``uid=admin`` or ``memberof=cn=admin,ou=groups,dc=mydomain,dc=tld``
+    *Optional.* It can be:
+
+    - absent, in which case all the users will have the permissions in this ACL.
+    - a mapping where keys are user attributes name and the values those user
+      attribute values. All the values must be matched for the user to be part
+      of the access control.
+    - a list of those mappings. If a user values match at least one mapping,
+      then the user will be part of the access control
+
+    Here are some examples:
+
+    - ``FILTER = {'user_name': 'admin'}``
+    - ``FILTER = [{'groups': 'admin'}, {'groups': 'moderators'}]``
 
 :PERMISSIONS:
     *Optional.* A list of items the users in the access control will be able to manage. Values can be:

tests/conftest.py

@@ -115,7 +115,7 @@ def configuration(slapd_server, smtpd):
                 ],
             },
             "ADMIN": {
-                "FILTER": "(|(uid=admin)(sn=admin))",
+                "FILTER": [{"user_name": "admin"}, {"family_name": "admin"}],
                 "PERMISSIONS": [
                     "manage_users",
                     "manage_oidc",
@@ -128,7 +128,7 @@ def configuration(slapd_server, smtpd):
                 ],
             },
             "MODERATOR": {
-                "FILTER": "(|(uid=moderator)(sn=moderator))",
+                "FILTER": [{"user_name": "moderator"}, {"family_name": "moderator"}],
                 "PERMISSIONS": ["manage_users", "manage_groups", "delete_account"],
                 "WRITE": [
                     "groups",