Oracle Identity Cloud Service is integrated as a SAML Identity Provider. For a detailed explanation of the SAML options on Rocket.Chat, and check the SAML Documentation.
Before you create your IDCS application, make sure you have enabled SAML per the SAML Documentation. You will need to have entered a Custom Provider and a Custom Issuer URL on the SAML settings page in Rocket.Chat.
Note: Leave the Custom Entry Point and IDP SLO Redirect URL values as the default values for now. We will obtain these URLs below, but you must save the SAML settings with your Custom Issuer URL so you can visit this URL and obtain values that are necessary when creating the IDCS application below.
On your Oracle Cloud Applications Dashboard, find a button to add a new application. It should open the following pop-up:
Select SAML Application to open the configuration wizard.
The only information needed on this page is the application name and URL. The URL you need to use here is the same one that is set on the Custom Issuer SAML configuration field on the Rocket.Chat settings.
To get the values for those new settings, you need to access the same Custom Issuer URL that you used on the previous page. It should show an XML file similar to the one below:
On the AssertionConsumerService tag, you need to copy the value of the Location attribute. Then paste this value on the Assertion Consumer URL field on the Oracle Settings. On the SingleLogoutService tag, you need to copy the value of the Location attribute, then paste it in the Single Logout URL param of the Advanced Settings. On the same SingleLogoutService tag, you need to copy the value of the ResponseLocation attribute, then paste it in the Logout Response URL param of the Advanced Settings.
Finally, the Entity Id param receives the URL of the XML file itself (the same URL you used as the application URL).
Before clicking on Finish, click the Download Identity Provider Metadata button to download another XML file.
There are two Rocket.Chat settings that need to be copied from the IDP Metadata you just downloaded: Custom Entry Point and IDP SLO Redirect URL.
For the first one, locate the tag md:SingleSignOnService and copy the value of the Location attribute (ends with /idp/sso).
For the second param, locate the tag md:SingleLogoutService and copy the value of the Location attribute (ends with /idp/slo).
There may be multiple occurrences of those tags in the XML file, so make sure that the copied URLs end with /idp/sso and /idp/slo and not /sp/sso and /sp/slo.
Everything should be properly configured now. You can now add users to your SAML Integration app on the Oracle Dashboard and then test the login on your Rocket.Chat instance.