users: Set proper class on default password policy object

- Some trivial refactoring.

Tests:

- The default password policy works. Inactive users are unable to login via
console, SSH and cockpit.

- After the app is setup freshly and after it is upgraded from previous version,
the namedobject.schema has been ingested into the OpenLDAP configuration.

- Rerunning setup for users app works.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/users/privileged.py

@@ -205,9 +205,17 @@ changetype: modify
 add: olcModuleLoad
 olcModuleLoad: ppolicy''')
     except subprocess.CalledProcessError as error:
-        if error.returncode == 20:  # Value already exists
-            pass
-        else:
+        if error.returncode != 20:  # Value already exists
+            raise
+
+    # Add namedobject schema needed for 'objectClass: namedPolicy'.
+    try:
+        subprocess.run([
+            'ldapadd', '-Q', '-Y', 'EXTERNAL', '-H', 'ldapi:///', '-f',
+            '/etc/ldap/schema/namedobject.ldif'
+        ], check=True, stdout=subprocess.DEVNULL)
+    except subprocess.CalledProcessError as error:
+        if error.returncode != 80:  # Schema already added
             raise
 
     # Set up default password policy
@@ -217,14 +225,12 @@ olcModuleLoad: ppolicy''')
 dn: cn=DefaultPPolicy,ou=policies,dc=thisbox
 cn: DefaultPPolicy
 objectClass: pwdPolicy
-objectClass: device
+objectClass: namedPolicy
 objectClass: top
 pwdAttribute: userPassword
 pwdLockout: TRUE''')
     except subprocess.CalledProcessError as error:
-        if error.returncode == 68:  # Value already exists
-            pass
-        else:
+        if error.returncode != 68:  # Value already exists
             raise
 
     # Make DefaultPPolicy as a default ppolicy overlay
@@ -288,12 +294,13 @@ def _unlock_ldap_user(username: str):
     if not _get_user_ids(username):
         # User not found
         return None
+
     # Replace command without providing a value will remove the attribute
     # and ignores when the attribute doesn't exist.
     input = '''changetype: modify
 replace: pwdAccountLockedTime
 '''
-    _run(["ldapmodifyuser", username], input=input.encode())
+    _run(['ldapmodifyuser', username], input=input.encode())
 
 
 @privileged
@@ -452,6 +459,7 @@ def _get_user_ids(username: str) -> str | None:
         if error.returncode == 1:
             # User doesn't exist
             return None
+
         raise
 
     return process.stdout.decode().strip()
@@ -614,7 +622,7 @@ def set_user_status(username: str, status: str, auth_user: str,
     if status == 'inactive':
         # Kill all user processes. This includes disconnectiong ssh, samba and
         # cockpit sessions.
-        subprocess.run(['pkill', "--signal", "KILL", '--uid', username])
+        subprocess.run(['pkill', '--signal', 'KILL', '--uid', username])
 
 
 def _upgrade_inactivate_users(usernames: list[str]):
@@ -625,7 +633,7 @@ def _upgrade_inactivate_users(usernames: list[str]):
     _flush_cache()
 
     for username in usernames:
-        subprocess.run(['pkill', "--signal", "KILL", '--uid', username])
+        subprocess.run(['pkill', '--signal', 'KILL', '--uid', username])
 
 
 def _flush_cache():

plinth/modules/users/tests/test_functional.py

@@ -154,7 +154,7 @@ def test_user_states(session_browser, tmp_path_factory):
     """Test that admin users can set other users as inactive/active."""
     username = 'bob2'
     _non_admin_user_exists(session_browser, username,
-                           groups=["freedombox-ssh"])
+                           groups=['freedombox-ssh'])
     _configure_ssh_keys(session_browser, tmp_path_factory, username=username)
 
     # Test set user inactive
@@ -343,10 +343,11 @@ def _set_ssh_keys(browser, ssh_keys, username=None):
 
 def _set_user_status(browser, username, status):
     functional.visit(browser, '/plinth/sys/users/{}/edit/'.format(username))
-    if status == "inactive":
+    if status == 'inactive':
         browser.find_by_id('id_is_active').uncheck()
-    elif status == "active":
+    elif status == 'active':
         browser.find_by_id('id_is_active').check()
+
     browser.find_by_id('id_confirm_password').fill(_admin_password)
     functional.submit(browser, form_class='form-update')