This guide describes how to enable Single Sign-On for G Suite for Education (G Suite) using simpleSAMLphp as the identity provider (IdP). G Suite is not part of the federation. The G Suite's metadata must be known to the IdP and vice versa, the G Suite SP must now the IdP metadata.
Configure G Suite for Education
Log in to the Admin console and then select Security.
Select Set up single sign-on (SSO).
Sign-in page URL
Change the hostname idp.example.com to the hostname of your IdP.
Sign-out page URL
Change the hostname idp.example.com to the hostname of your IdP. The RelayState parameter is the address that the browser will be redirected to after logout.
Upload the certificate that are used by the IdP (/var/simplesamlphp/cert/server.crt).
In the file metadata/saml20-sp-remote.php there should be an example configuration for G Suite.
$metadata['google.com'] = array(
'AssertionConsumerService' =>'https://www.google.com/a/g.feide.no /acs',
'NameIDFormat' => 'rn:oasis:names:tc:SAML:2.0:nameid-format:emailAddress',
'simplesaml.nameidattribute' => 'uid',
'simplesaml.attributes' => FALSE,
Change the domainname g.feide.se to the domain used in G Suite.
The Google Accounts username is sent in the SAML response in the XML element NameID. G Suite parses the NameID, and expects that this element either contains a G Suite username or a full G Suite email address. In the example NameID is set to the attribute uid