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Overleaf SAML

Available in Overleaf Server Pro is the ability to use a SAML server to manage users.

SAML is configured in the Toolkit via variables.env.

The EXTERNAL_AUTH variable must be set to saml, to enable the SAML module:

EXTERNAL_AUTH=saml

(To preserve backward compatibility with older configuration files, if EXTERNAL_AUTH is not set, but SHARELATEX_SAML_ENTRYPOINT is set (SHARELATEX_LDAP_URL for versions 4.x and older), then the SAML module will be activated. We still recommend setting EXTERNAL_AUTH explicitely)

The Developer wiki contains further documentation on the available Environment Variables and other configuration elements.

Example

At Overleaf, we test the SAML integration against a SAML test server. The following is an example of a working configuration:

# added to variables.env
# For versions of Overleaf CE/Server Pro `4.x` and older use the 'SHARELATEX_' prefix instead of 'OVERLEAF_'

EXTERNAL_AUTH=saml
OVERLEAF_SAML_ENTRYPOINT=http://localhost:8081/simplesaml/saml2/idp/SSOService.php
OVERLEAF_SAML_CALLBACK_URL=http://saml/saml/callback
OVERLEAF_SAML_ISSUER=sharelatex-test-saml
OVERLEAF_SAML_IDENTITY_SERVICE_NAME=SAML Test Server
OVERLEAF_SAML_EMAIL_FIELD=email
OVERLEAF_SAML_FIRST_NAME_FIELD=givenName
OVERLEAF_SAML_LAST_NAME_FIELD=sn
OVERLEAF_SAML_UPDATE_USER_DETAILS_ON_LOGIN=true

The sharelatex/saml-test image needs to run in the same network as the sharelatex container (which by default would be overleaf_default), so we'll proceed with the following steps:

  • Run docker network create overleaf_default (will possibly fail due to a network with name overleaf_default already exists error, that's ok).
  • Start saml-test container with some environment parameters:
docker run --network=overleaf_default --name=saml                 \
    --publish='8081:80'                                           \
    --env SAML_BASE_URL_PATH='http://localhost:8081/simplesaml/'  \
    --env SAML_TEST_SP_ENTITY_ID='sharelatex-test-saml'           \
    --env SAML_TEST_SP_LOCATION='http://localhost/saml/callback'  \
    sharelatex/saml-test
  • Edit variables.env to add the SAML Environment Variables as listed above.
  • Restart Server Pro.

You should be able to login using sally as username and sall123 as password.