Issue: authd treats usernames as case-sensitive

[adombeck]

Is there an existing issue for this?

• I have searched the existing issues and found none that matched mine

Describe the issue

Usernames in Microsoft Entra are case-insensitive, so login via authd and the authd-msentraid broker should also treat usernames as case-insensitive, but it does not.

Steps to reproduce

1. sudo login [email protected]
2. Complete the device authentication
3. Set a local password
4. Now try to log in as the same user but use different lower/uppercase:

   sudo login [email protected]
   

5. No local authentication is offered
6. The logs contain DEBUG User "[email protected]" is unknown

System information and logs

authd version

authd	0.3.4~ppa3

authd-msentraid broker version

name:      authd-msentraid
summary:   MS EntraID Broker for authd
publisher: --
store-url: https://snapcraft.io/authd-msentraid
license:   GPL-3.0
description: |
  Broker that enables OIDC authentication with MS EntraID group management
  for authd.
services:
  authd-msentraid: simple, enabled, active
refresh-date: today at 12:03 CEST
channels:
  0.x/stable:    0.1           2024-08-23 (33) 17MB -
  0.x/candidate: ^                                  
  0.x/beta:      ^                                  
  0.x/edge:      0.1           2024-09-10 (44) 17MB -
installed:       main~2182c5f4            (x1) 17MB -

gnome-shell version

gnome-shell:
  Installed: 46.3.1-1ubuntu1~24.04.1authd1
  Candidate: 46.3.1-1ubuntu1~24.04.1authd1
  Version table:
 *** 46.3.1-1ubuntu1~24.04.1authd1 500
        500 https://ppa.launchpadcontent.net/ubuntu-enterprise-desktop/authd-edge/ubuntu noble/main amd64 Packages
        100 /var/lib/dpkg/status
     46.3.1-1ubuntu1~24.04.1 500
        500 https://ppa.launchpadcontent.net/ubuntu-enterprise-desktop/authd/ubuntu noble/main amd64 Packages
     46.0-0ubuntu6~24.04.4 500
        500 http://de.archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
     46.0-0ubuntu6~24.04.3 500
        500 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages
     46.0-0ubuntu5 500
        500 http://de.archive.ubuntu.com/ubuntu noble/main amd64 Packages

Distribution

Distributor ID:	Ubuntu
Description:	Ubuntu 24.04.1 LTS
Release:	24.04
Codename:	noble

Logs

[667658.599568] ubuntu authd[216727]: 2024/09/12 12:28:57 WARN rpc error: code = NotFound desc =
[667658.600179] ubuntu authd[216727]: DEBUG User "[email protected]" is unknown

authd broker configuration

/etc/authd/brokers.d/authd-msentraid.conf

[authd]
name = Microsoft Entra ID
brand_icon = /snap/authd-msentraid/current/broker_icon.png
dbus_name = com.ubuntu.authd.MSEntraID
dbus_object = /com/ubuntu/authd/MSEntraID

authd-msentraid configuration

[oidc]
issuer = https://login.microsoftonline.com/<UUID redacted>/v2.0
client_id = <UUID redacted> 
#client_id = <UUID redacted>

Double check your logs

• I have redacted any sensitive information from the logs