Facebook sign-in

Add Facebook sign-in as an authentication method to Integrity Web

Let your consumers use their existing Facebook account to sign in to any service protected by Integrity Web.

Guide prerequisite:

• Integrity Web installed

• DNS-name and certificates in place for the Integrity Web https-host

• Facebook non-personal organization account (for production purposes, for test you may use your private Facebook account)

NB! To collect the end user email address from the authentication, you must login with a Facebook business account to perform the administration. The setup below is performed with a non-business account, hence no email claim will be provided. Instead the claim sub will be used as the identifier.

Add authentication method

Add this configuration to the Authn module in the configuration:

  {
                        "id": "fb",
                        "type": "OIDCRP",
                        "config": {
                            "base_path": "/saml/authn",
                            "discovery_metadata_url": "https://my.own.host/.well-known/fb-openid-configuration",
                            "internal_http_destination": "default",
                            "client_id": "fb.client.id.value",
                            "client_secret": "fb.client.secret.value",
                            "redirect_uri": "https://my.own.host/saml/authn/fb",
                            
                            "jwt_subject_parameter": "sub"
                        }
                    }

Change the DNS host name of the redirect_uri to match your environment. Copy the value of the redirect_uri as this will be used in a later step.

Facebook configuration

1. Sign in to https://developers.facebook.com/apps/

2. Click Create App

3. Select Other

4. Select Consumer

5. Enter an app name, such as Integrity

6. Change the app contact email, if necessary.

7. Create

8. Click Set up below Facebook login

9. Select Web

10. Enter the redirect_uri, copied in previous step, as the Site url

11. Click Save and then Continue

12. Click Next

13. Click Next

14. Click Next

15. In the left-hand panel, select Facebook Login->Settings

16. Add the redirect_uri copied from previous step to Valid OAuth Redirect URIs

17. Save changes

18. In the left-hand panel, select App settings->Basic

19. Copy the app id and app secret values (these will be used as client_id and client_secret in later steps)

Prepare Facebook Discovery

The Facebook OpenID Connect Discovery metadata does not include a mandatory parameter, token endpoint. To make Facebook work with Integrity web, the Facebook OpenID Connect Discovery metadata must be downloaded, altered and then published on a URL, reachable from the Integrity Web server.

1. Download Facebook Discovery from https://www.facebook.com/.well-known/openid-configuration. Name the file fb-openid-configuration

2. Open fb-openid-configuration in a text editor

3. Add the token_endpoint parameter to the json structure:

"authorization_endpoint": "https://facebook.com/dialog/oauth/",
   "token_endpoint" : "https://graph.facebook.com/v17.0/oauth/access_token",
   "jwks_uri": "https://www.facebook.com/.well-known/oauth/openid/jwks/",

1. Save the file

2. Place the file on a web server. In this configuration example, the proxy server (Apache) has been used.

1. Adjust the Integrity Web configuration. Locate the autenticator and adjust the parameter discovery_metadata_url to match your environment. "discovery_metadata_url": "https://my.own.host/.well-known/fb-openid-configuration",

Add client credentials

1. Open the Integrity Web configuration

2. Locate the Facebook Authentication method added in previous step

3. Replace the client_id and client_secret values with the values copied in previous step.

Example:

  {
                        "id": "fb",
                        "type": "OIDCRP",
                        "config": {
                            "base_path": "/saml/authn",
                            "discovery_metadata_url": "https://01c5-194-68-171-97.ngrok-free.app/.well-known/fb-openid-configuration",
                            "internal_http_destination": "default",
                            "client_id": "23234234234666121",
                            "client_secret": "45609e54023940gfgwsfj234234asldkjsdfkj.erwzdsr43",
                            "redirect_uri": "https://01c5-194-68-171-97.ngrok-free.app/saml/authn/fb",
                            "jwt_subject_parameter": "sub"
                        }
                    },

Test

Alter the configuration to point to the new Facebook authenticator, either directly or as a selector option.

Browse to the service protected by Integrity Web.

Select Facebook as authentication method.

Your browser should now be redirected to the Facebook sign-in site.

Enter your Facebook credentials and approve the authentication.

You should now be redirected back to Integrity and then to the service with a valid authentication.

Use server.log for error tracing and debugging. Fix accordingly and test again.

Sample configuration

A sample Integrity Web configuration, including a number of different social provider sign-in options, can be downloaded here.