WikiJS LDAP Group Sync

WikiJS currently lacks the ability to sync groups from authentication providers to WikiJS. They plan to provide a feature like that in its 3.0 release, until then this Python script can help.

WikiJS version tested: 2.5.284

Architecture

This script relies on the WikiJS GraphQL server to get group membership information which unfortunately has no way of getting a list of users together with their internal ids and group memberships. Due to that this script has to send as many requests as there are users times the amount of groups so depending on your network the runtime may vary.

Roughly speaking the script does the following:

1. Connect to LDAP
2. Retrieve user information, group names and group membership from LDAP
3. Retrieve user information (id, email) and group information (id, name) from WikiJS
4. Add group to WikiJS if group doesn't already exist
5. Compare data and map group ownership to users
6. Tell WikiJS to assign groups to users

Because we have no way of knowing which user is assigned to which group without making individual requests to the WikiJS GraphQL API (or batching them) the majority of runtime is going to be spent on the last step.

The script itself is stateless, all logging goes to stdout.

Installing

Docker

Pull from GitHub Container registry:

docker pull ghcr.io/macbrayne/wikijs-ldap-group-sync

Pull from Docker Hub:

docker pull macbrayne/wikijs-ldap-group-sync

Alternatively, you can build it yourself:

docker build -t macbrayne/wikijs-ldap-group-sync 'https://github.com/macbrayne/wikijs-ldap-group-sync.git#main'

Poetry

Depending on your distribution you might have to install additional dependencies before being able to use the script. In case of Debian based distributions these dependencies might be:

apt-get install --no-install-recommends build-essential libsasl2-dev libldap2-dev

Then, after installing poetry simply execute poetry run sync to run the script.

Configuration

By default, WikiJS LDAP Group Sync uses environment variables however you can also provide a .env file in the main execution directory.

Environment Variable	Example	Meaning
WIKIJS_URL	"https://wiki.example.com/graphql"	URL of the WikiJS GraphQL endpoint
WIKIJS_TOKEN	"Bearer rVcMvDUsAAv4abPxcIEg"	Used for authenticating to GraphQL 1
LDAP_URL	"ldaps://ldap.example.com:636"	URL of the LDAP Server 2
ADMIN_BIND_DN	"UID=admin,CN=Users,DC=example,DC=com"	DN used for authenticating to LDAP
ADMIN_BIND_CRED	"supersecretpassword"	Password used for authenticating to LDAP
GROUPS_SEARCH_BASE	"CN=Groups,DC=example,DC=com"	LDAP base groups will be searched for under
GROUPS_SEARCH_FILTER	"(objectClass=posixGroup)"	LDAP group search filter
USER_SEARCH_BASE	"CN=Users,DC=example,DC=com"	LDAP base users will be searched for under
USER_SEARCH_FILTER	"(&(objectClass=organizationalPerson)(memberof=CN=Domain Users,CN=Groups,DC=example,DC=com))"	LDAP user search filter
(optional) LOG_LEVEL	(default) "INFO"	Log level to be used 3
(optional) LDAP_TLS_VERIFICATION	any value	If this value is set the certificate will be verified 4
(untested) LDAP_TLS_CERT_FILE	"/etc/ldap/cacert/cacert.pem"	Path to a certificate 4

Footnotes

1. Authentication tokens can be generated in the WikiJS Admin Panel under "API Access" ↩

2. Note that you have to also set "LDAP_TLS_VERIFICATION" if you want the certificate to be validated ↩

3. Server down at "ERROR", group creation at "WARNING", general program flow at "INFO", the results of group assignments at "DEBUG" ↩

4. Note that a failure when verifying the certificate won't output any more information than "Can't contact LDAP server" ↩ ↩²