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Firebase SAML Single Sign-On (SSO)

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Firebase is the best platform for mobile application development which produces quality apps with features like app indexing, cloud messaging, remote configuration, hosting and In-app advertising. Firebase provides authentication options like backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app. It supports authentication using passwords, phone numbers, popular federated identity providers like Google, Facebook and Twitter, and more. Firebase Authentication integrates tightly with other Firebase services, and it leverages industry standards like JWT, OAuth 2.0 and OpenID Connect, so it can be easily integrated with custom backend.

We will be demonstrating below how we can achieve Single Sign-On (SSO) into Firebase using one or multiple SAML 2.0 compliant Identity Provider. We will be using miniOrange cloud service to achieve this. We support all known IDPs like miniOrange, Google Apps, ADFS, Okta, OneLogin, Azure AD, Salesforce, Shibboleth, SimpleSAMLphp, OpenAM, Centrify, Ping, RSA, IBM, Oracle, Bitium, WSO2, NetIQ etc.

Prerequisites

• Log into miniOrange Admin Console.
• Click on Customization in the left menu of the dashboard.
• In Basic Settings, set your company domain in Organization Name textfield.
• Click Save. Once that is set, the branded login URL would be of the format https://<company_domain>.xecurify.com/moas/login

Follow the Step-by-Step Guide given below for Firebase Single Sign-On (SSO)

1. Configure Firebase App with miniOrange

• Login to miniOrange Admin Console.
• Go to Apps Click on Add Application button.



• Under the Choose Application Type, click on JWT.



• Click on Firebase.





• In Add Apps tab enter the values and click on Save.

  Custom Application Name	Choose appropriate name according to your choice.
  Description	Add appropriate description according to your choice.
  Redirect-URL	JWT Endpoint fetched from JWT in the previous step.

• To configure App secret go to Edit against your configured app, Apps>>Select your app>>Edit






App Secret	The API Token fetched from Firebase dashboard
Signature Algorithm	Choose HS256

• Click on Save.
• Now, You can access Firebase Account Using IDP credentials through the Single-sign-on URL as shown in image above.

2. Configure miniOrange in your IDP

• Copy SAML ACS URL value as given in the screenshot below. This is the login URL for miniOrange.
• Set Entity ID/Issuer as https://login.xecurify.com/moas

3. Send Request to miniOrange

• In order to send request to miniOrange, a custom token needs to be formed and sent from Firebase application. This will include the identifier (configured in Step 1) of Identity Provider (e.g.ADFS) against which authentication needs to be done.
• For cryptographic purposes, use the CryptoJS library.
• To get the Customer ID and Token Key, the following steps need to be performed:
1) Navigate to the miniOrange Admin Console.
2) Login with the miniOrange Account credentials.
3) Navigate to the Settings.
4) Note down the Customer ID and Token Key.



• The below code accepts IdPName (String) as a parameter. This parameter is the same value as configured in Step 1 which is used to distinguish different IDPs.
• For testing purpose, create a sample html file & call the following functions on document load.
• NOTE: You need to replace the Token Key, Customer ID and Response URL for your miniOrange account and added application. Sample Javascript Code for Sending Request to miniOrange.
• Add the following crypto JS files in your code:

<script src="/crypto-js/3.1.2/components/core-min.js"></script>
<script src="/components/sha256.js"></script>
<script src="/components/enc-base64.js"></script>
<script src="/rollups/aes.js"></script>
<script src="/components/mode-ecb.js"></script>
<script src="/components/pbkdf2.js"></script>
<script src="/components/pas-nopadding.js"></script>
<script>
function sendRequest(idpName) 
{ 	
  var appSecret = "";    //miniOrange App Secret 
  var tokenKey = "";     //miniOrange Token Key of Customer 
  var customerId = "";   //miniOrange Customer ID 
  var responseUrl = "";  //Response URL (configured in Step 2) 
  var date = new Date(); 
  var currentTimestamp = date.getTime(); 
  var inputString = currentTimestamp + ":" + appSecret;
  var keyHex = CryptoJS.enc.Utf8.parse(tokenKey);
  var cipherText = CryptoJS.enc.Base64.stringify(CryptoJS.AES.encrypt(inputString, keyHex, {mode:CryptoJS.mode.ECB}).ciphertext); 

  var redirectUrl = "https://login.xecurify.com/moas/broker/login/jwt/" + customerId + "/" + idpName + "?token=" + cipherText + "&returnUrl=" + responseUrl;

  window.location = redirectUrl;
}
</script>

4. Modify JWT Response

• At this point authentication with IDP should work but the user will not be logged into Firebase. When IDP sends a SUCCESS, miniOrange will send a JWT response to the Response URL(Firebase URL which will process the response). The Response URL needs to modify the JWT Response so that it is compatible with Firebase standards.
• NOTE: You need to replace iss, sub and aud values based on your Firebase project.
• Sample Javascript Code for modifying JWT Response :

function modifyJwtResponse(token)
{ 
  //CONFIGURATION PARAMETERS 
  var iss = "";        //Project's Service Account Email Address 
  var sub = "";        //Project's Service Account Email Address 
  var aud = "https://identitytoolkit.googleapis.com/google.identity.identitytoolkit.v1.IdentityToolkit"; //Required audience value
  var base64Url = token.split('.')[1]; 
  var base64 = base64Url.replace('-', '+').replace('_', '/'); 
  var decodedToken = JSON.parse(window.atob(base64));
  //MODIFY JWT VALUES BELOW 
  decodedToken['iss'] = iss; 
  decodedToken['sub'] = sub; 
  decodedToken['aud'] = aud; 
  //Base64 Encode Token 
  var encodedToken = btoa(JSON.stringify(decodedToken));
  //CREATE NEW JWT TOKEN 
  var newToken =  token.split('.'); 
  var newJwtToken = newToken[0] + "." + encodedToken + "." + newToken[2]; 
  return newJwtToken;
}



• The new token can be used to authenticate the user in Firebase using the signInWithCustomToken() function.



				 
firebase.auth().signInWithCustomToken(token).catch(function(error)
{ 
	// Handle Errors here. 
	var errorCode = error.code; 
	var errorMessage = error.message; 
	// ... 
});

5. Configure Your User Directory

miniOrange provides user authentication from various external sources, which can be Directories (like ADFS, Microsoft Active Directory, Azure AD, OpenLDAP, Google, AWS Cognito etc), Identity Providers (like Okta, Shibboleth, Ping, OneLogin, KeyCloak), Databases (like MySQL, Maria DB, PostgreSQL) and many more. You can configure your existing directory/user store or add users in miniOrange.

• Setup miniOrange as IDP
• Setup AD as User Directory
• Setup External IDP

• To add your users in miniOrange there are 2 ways:

1. Create User in miniOrange

2. Bulk Upload Users

1. Create User in miniOrange

• Click on Users >> User List >> Add User.



• Here, fill the user details without the password and then click on the Create User button.



• After successful user creation a notification message "An end user is added successfully" will be displayed at the top of the dashboard.



• Click on On Boarding Status tab. Check the email, with the registered e-mail id and select action Send Activation Mail with Password Reset Link from Select Action dropdown list and then click on Apply button.



• Now, Open your email id. Open the mail you get from miniOrange and then click on the link to set your account password.
• On the next screen, enter the password and confirm password and then click on the Single Sign-On (SSO) reset password button.



• Now, you can log in into miniOrange account by entering your credentials.

2. Bulk Upload Users in miniOrange via Uploading CSV File.

• Navigate to Users >> User List. Click on Add User button.



• In Bulk User Registration Download sample csv format from our console and edit this csv file according to the instructions.



• To bulk upload users, choose the file make sure it is in comma separated .csv file format then click on Upload.



• After uploading the csv file successfully, you will see a success message with a link.
• Click on that link you will see list of users to send activation mail. Select users to send activation mail and click on Send Activation Mail. An activation mail will be sent to the selected users.

• Click on External Directories >> Add Directory in the left menu of the dashboard.



• Select Directory type as AD/LDAP.



1. STORE LDAP CONFIGURATION IN MINIORANGE: Choose this option if you want to keep your configuration in miniOrange. If active directory is behind a firewall, you will need to open the firewall to allow incoming requests to your AD.
2. STORE LDAP CONFIGURATION ON PREMISE: Choose this option if you want to keep your configuration in your premise and only allow access to AD inside premises. You will have to download and install miniOrange gateway in your premise.




• Enter LDAP Display Name and LDAP Identifier name.
• Select Directory Type as Active Directory.
• Enter the LDAP Server URL or IP Address against LDAP Server URL field.
• Click on Test Connection button to verify if you have made a successful connection with your LDAP server.



• In Active Directory, go to the properties of user containers/OU's and search for Distinguished Name attribute.



• Enter the valid Bind account Password.
• Click on Test Bind Account Credentials button to verify your LDAP Bind credentials for LDAP connection.



• Search Base is the location in the directory where the search for a user begins. You will get this from the same place you got your Distinguished name.



• Select a suitable Search filter from the drop down menu. To use custom Search Filter select "Write your Custom Filter" option and customize it accordingly.



• You can also configure following options while setting up AD. Enable Activate LDAP in order to authenticate users from AD/LDAP. Click on the Save button to add user store.




Here's the list of the attributes and what it does when we enable it. You can enable/disable accordingly.

Attribute	Description
Activate LDAP	All user authentications will be done with LDAP credentials if you Activate it
Sync users in miniOrange	Users will be created in miniOrange after authentication with LDAP
Fallback Authentication	If LDAP credentials fail then user will be authenticated through miniOrange
Allow users to change password	This allows your users to change their password. It updates the new credentials in your LDAP server
Enable administrator login	On enabling this, your miniOrange Administrator login authenticates using your LDAP server
Show IdP to users	If you enable this option, this IdP will be visible to users
Send Configured Attributes	If you enable this option, then only the attributes configured below will be sent in attributes at the time of login



• Click on Save. After this, it will show you the list of User stores. Click on Test Connection to check whether you have enter valid details. For that, it will ask for username and password.



• On Successful connection with LDAP Server, a success message is shown.
• Click on Test Attribute Mapping.



• Enter a valid Username. Then, click on Test. Mapped Attributes corresponding to the user are fetched.



• After successful Attribute Mapping Configuration, go back to the ldap configuration and enable Activate LDAP in order to authenticate users from AD/LDAP.

Refer our guide to setup LDAPS on windows server.

User Import and Provisioning from AD

• Go to Settings >> Product Settings in the Customer Admin Account.



• Enable the "Enable User Auto Registration" option and click Save.



• (Optional) To send a welcome email to all the end users that will be imported, enable the "Enable sending Welcome Emails after user registration" option and click Save.



• From the Left-Side menu of the dashboard select Provisioning.



• In Setup Provisioning tab select Active Directory in the Select Application Drop Down.
• Toggle the Import Users tab, click on Save button.



• On the same section, switch to Import Users section.
• Select Active Directory from the dropdown and click on the Import Users tab, to import all the users from Active Directory to miniOrange.



• You can view all the Users you have imports by selecting Users >> User List from Left Panel.



• All the imported users will be auto registered.
• These groups will be helpful in adding multiple 2FA policies on the applications.

miniOrange integrates with various external user sources such as directories, identity providers, and etc.

• Okta
• ADFS
• Ping
• AWS Cognito
• Many more

Not able to find your IdP or Need help setting it up?

Contact us or email us at idpsupport@xecurify.com and we'll help you setting it up in no time.