Failed LDAP authentication if user CN contains parenthesis

Summary

If FishEye is connected to Microsoft AD for authentication and one (or more) of the users has a parenthesis (() in his CN, when the user will try to authenticate the authentication will fail.

The user will be correctly synced and will be shown in the user list.

Environment

FishEye and Microsoft Active Directory

Steps to Reproduce

1. Create a user in Microsoft AD with a parenthesis (() in his CN
2. Re-sync users
3. Test the LDAP configuration trying to connect to that user

Expected Results

Authentication should succeed and the following info should be showed:

Actual Results

The test fails and the following info are showed:

Nothing is showed in the logs.

Workaround

1 - Use JIRA/Crowd as external user directory
JIRA is not affected by the same bug so, in case a JIRA instance is already used in the same network and it is synced against the same AD it is possible to sync FishEye to use JIRA.

2 - Modify Users affected
If the user CN gets modified (to remove the () and FishEye re-syncs with AD the issue disappears and the user is able to connect.

After that if the user CN is changed again (re-adding the () the authentication succeeds