zalgonoise/gldap repository overview

⁠gldap

⁠Google LDAP Deployment and Querying tools

A simple and light Docker image for querying G Suite domains via Secure LDAP.

Google G Suite LDAP queries can be performed with OpenLDAP and STunnel, which are the sole tenants of this image.

The purpose is to be able to query and test your LDAP queries, in an easy and quick way - without ever leaving crums behind.

⁠Environment Definition

Deploying in an ephemeral approach is the preferred way, as STunnel takes little to no time launching. It is encouraged to keep the clean-up-after-yourself flag [--rm].

The private .crt/.key combination that you've downloaded should be moved into the keys folder and renamed stunnel as such:

/path/to/repo/keys/stunnel.crt
/path/to/repo/keys/stunnel.key

Which you can do after you've downloaded them. Unzip the archive into the keys folder, cd into it and run the commands:

cp *.crt stunnel.crt
cp *.key stunnel.key

The keys folder is the folder attached to the container holding the certificates. It should be linked to the /data folder in the container.

Alternatively, you can mount these files individually, renaming them inside the container to:

• /data/stunnel.crt
• /data/stunnel.key

Finally define the following environment variables when starting the container:

LDAP_USER=username
LDAP_PASS=password
LDAP_BASESEARCH=dc=ldaptest,dc=eu

⁠Container Deployment

Either export, source or replace the variables from the command below to perform a query:

docker run --rm -ti \
    --name gldap \
    -v `pwd`/keys:/data \
    -e LDAP_USER=$LDAP_USER \
    -e LDAP_PASS=$LDAP_PASS \
    -e LDAP_BASESEARCH=$LDAP_BASESEARCH \
    zalgonoise/gldap:latest \
    $LDAP_FILTER

You can also use --env-file and populate the provided template:

docker run --rm -ti \
    --name gldap \
    -v `pwd`/keys:/data \
    --env-file `pwd`/secrets.env \
    zalgonoise/gldap:latest

Lastly, the containter supports the unzip action, so you can provide the .zip file directly:

docker run --rm -ti \
    --name gldap \
    -v ~/Downloads/Google_2023_02_04_48611.zip:/data/Google.zip \
    --env-file `pwd`/secrets.env \
    zalgonoise/gldap:latest

If you prefer to add the .crt/.key combination individually:

docker run --rm -ti \
    --name gldap \
    -v `pwd`/keys/Google_20YY_MM_DD_XXXXX.crt:/data/stunnel.crt:ro \
    -v `pwd`/keys/Google_20YY_MM_DD_XXXXX.key:/data/stunnel.key:ro \
    -e LDAP_USER=$LDAP_USER \
    -e LDAP_PASS=$LDAP_PASS \
    -e LDAP_BASESEARCH=$LDAP_BASESEARCH \
    zalgonoise/gldap:latest \
    $LDAP_FILTER

You will be returned an output of the STunnel service, followed by the result of your LDAP query.

⁠Debug Mode

Running queries in OpenLDAP debug mode (by attaching the flag -d5 to the ldapsearch command) can be done in through the LDAP_FILTER environment variable or provided as the first argument to the container:

docker run --rm -ti \
    --name gldap \
    -v `pwd`/keys/Google_20YY_MM_DD_XXXXX.crt:/data/stunnel.crt:ro \
    -v `pwd`/keys/Google_20YY_MM_DD_XXXXX.key:/data/stunnel.key:ro \
    -e LDAP_USER=$LDAP_USER \
    -e LDAP_PASS=$LDAP_PASS \
    -e LDAP_BASESEARCH=$LDAP_BASESEARCH \
    zalgonoise/gldap:latest \
    -d5 "objectClass=*"

This action will add the -d5 flag to ldapsearch, dumping the debug output for your query.

~ ZalgoNoise ~ 2020 ~