A proxy for delegating LDAP requests to an OpenID Connect backend.
Project description
Apricot
Apricot
is a proxy for delegating LDAP requests to an OpenID Connect backend.
The name is a slightly tortured acronym for: LDAP proxy for OpenID Connect.
Usage
Start the Apricot
server on port 1389 by running:
python run.py --client-id "<your client ID>" --client-secret "<your client secret>" --backend "<your backend>" --port 1389 --domain "<your domain name>" --redis-host "<your Redis server>"
If you prefer to use Docker, you can edit docker/docker-compose.yaml
and run:
docker compose up
from the docker
directory.
Using Redis [Optional]
You can use a Redis server to store generated uidNumber
and gidNumber
values in a more persistent way.
To do this, you will need to provide the --redis-host
and --redis-port
arguments to run.py
.
Configure background refresh [Optional]
By default Apricot will refresh the LDAP tree whenever it is accessed and it contains data older than 60 seconds. If it takes a long time to fetch all users and groups, or you want to ensure that each request gets a prompt response, you may want to configure background refresh to have it periodically be refreshed in the background.
This is enabled with the --background-refresh
flag, which uses the --refresh-interval
parameter as the interval to refresh the ldap database.
Using TLS [Optional]
You can set up a TLS listener to communicate with encryption enabled over the configured port.
To enable it you need to configure the tls port ex. --tls-port=1636
, and provide a path to the pem files for the certificate --tls-certificate=<path>
and the private key --tls-private-key=<path>
.
Outputs
This will create an LDAP tree that looks like this:
dn: DC=<your domain>
objectClass: dcObject
dn: OU=users,DC=<your domain>
objectClass: organizationalUnit
ou: users
dn: OU=groups,DC=<your domain>
objectClass: organizationalUnit
ou: groups
Each user will have an entry like
dn: CN=<user name>,OU=users,DC=<your domain>
objectClass: inetOrgPerson
objectClass: organizationalPerson
objectClass: person
objectClass: posixAccount
objectClass: top
<user data fields here>
memberOf: <DN for each group that this user belongs to>
Each group will have an entry like
dn: CN=<group name>,OU=groups,DC=<your domain>
objectClass: groupOfNames
objectClass: posixGroup
objectClass: top
<group data fields here>
member: <DN for each user belonging to this group>
Primary groups
:exclamation: You can disable the creation of mirrored groups with the --disable-primary-groups
command line option :exclamation:
Apricot creates an associated group for each user, which acts as its POSIX user primary group.
For example:
dn: CN=sherlock.holmes,OU=users,DC=<your domain>
objectClass: inetOrgPerson
objectClass: organizationalPerson
objectClass: person
objectClass: posixAccount
objectClass: top
...
memberOf: CN=sherlock.holmes,OU=groups,DC=<your domain>
...
will have an associated group
dn: CN=sherlock.holmes,OU=groups,DC=<your domain>
objectClass: groupOfNames
objectClass: posixGroup
objectClass: top
...
member: CN=sherlock.holmes,OU=users,DC=<your domain>
...
Mirrored groups
:exclamation: You can disable the creation of mirrored groups with the --disable-mirrored-groups
command line option :exclamation:
Each group of users will have an associated group-of-groups where each user in the group will have its user primary group in the group-of-groups.
Note that these groups-of-groups are not posixGroup
s as POSIX does not allow nested groups.
For example:
dn:CN=Detectives,OU=groups,DC=<your domain>
objectClass: groupOfNames
objectClass: posixGroup
objectClass: top
...
member: CN=sherlock.holmes,OU=users,DC=<your domain>
...
will have an associated group-of-groups
dn: CN=Primary user groups for Detectives,OU=groups,DC=<your domain>
objectClass: groupOfNames
objectClass: top
...
member: CN=sherlock.holmes,OU=groups,DC=<your domain>
...
This allows a user to make a request for "all primary user groups needed by members of group X" without getting a large number of primary user groups for unrelated users. To do this, you will need an LDAP request that looks like:
(&(objectClass=posixGroup)(|(CN=Detectives)(memberOf=Primary user groups for Detectives)))
which will return:
dn:CN=Detectives,OU=groups,DC=<your domain>
objectClass: groupOfNames
objectClass: posixGroup
objectClass: top
...
member: CN=sherlock.holmes,OU=users,DC=<your domain>
...
dn: CN=sherlock.holmes,OU=groups,DC=<your domain>
objectClass: groupOfNames
objectClass: posixGroup
objectClass: top
...
member: CN=sherlock.holmes,OU=users,DC=<your domain>
...
OpenID Connect
Instructions for specific OpenID Connect backends below.
Microsoft Entra
You will need to use the following command line arguments:
--backend MicrosoftEntra --entra-tenant-id "<your tenant ID>"
You will need to register an application to interact with Microsoft Entra
.
Do this as follows:
- Create a new
App Registration
in yourMicrosoft Entra
.- Set the name to whatever you choose (e.g.
apricot
) - Set access to
Accounts in this organizational directory only
. - Set
Redirect URI
toPublic client/native (mobile & desktop)
with a value ofurn:ietf:wg:oauth:2.0:oob
- Set the name to whatever you choose (e.g.
- Under
Certificates & secrets
add aNew client secret
- Set the description to whatever you choose (e.g.
Apricot Authentication Secret
) - Set the expiry time to whatever is relevant for your use-case
- You must record the value of this secret at creation time, as it will not be visible later.
- Set the description to whatever you choose (e.g.
- Under
API permissions
:- Enable the following permissions:
Microsoft Graph
>User.Read.All
(application)Microsoft Graph
>GroupMember.Read.All
(application)Microsoft Graph
>User.Read.All
(delegated)
- Select this and click the
Grant admin consent
button (otherwise each user will need to manually consent)
- Enable the following permissions:
Keycloak
You will need to use the following command line arguments:
--backend Keycloak --keycloak-base-url "<your hostname>/<path to keycloak>" --keycloak-realm "<your realm>"
You will need to register an application to interact with Keycloak
.
Do this as follows:
- Create a new
Client
in yourKeycloak
instance.- Set the name to whatever you choose (e.g.
apricot
) - Enable
Client authentication
- Enable the following authentication flows and disable the rest:
- Direct access grants
- Service account roles
- Set the name to whatever you choose (e.g.
- Under
Credentials
copyclient secret
- Under
Service account roles
:- Click on
Assign role
thenFilter by clients
- Assign the following roles:
realm-management
>view-users
realm-management
>manage-users
realm-management
>query-groups
realm-management
>query-users
- Click on
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