Add sign-in with Microsoft Entra account to a Spring web app - Java on Azure

Artículo
12/18/2024

This article shows you how to develop a Spring web app that supports sign-in by Microsoft Entra account. After finishing all steps in this article, the web app will redirect to the Microsoft Entra sign-in page when it's been accessed anonymously. The following screenshot shows the Microsoft Entra sign-in page:

Screenshot of application 'Sign in' dialog.

Prerequisites

The following prerequisites are required to complete the steps in this article:

A supported Java Development Kit (JDK). For more information about the JDKs available for use when developing on Azure, see Java support on Azure and Azure Stack.
Apache Maven, version 3.0 or higher.
An Azure subscription. If you don't have an Azure subscription, create a free account.

Important

Spring Boot version 2.5 or higher is required to complete the steps in this article.

Create an app using Spring Initializr

Browse to https://start.spring.io/.
Specify that you want to generate a Maven project with Java, enter the Group and Artifact names for your application.
Add Dependencies for Spring Web, Microsoft Entra ID, and OAuth2 Client.
At the bottom of the page, select the GENERATE button.
When prompted, download the project to a path on your local computer.

Create Microsoft Entra instance

Create the Active Directory instance

If you're the administrator of an existing instance, you can skip this process.

Log into https://portal.azure.com.
Select All services, then Identity, and then Microsoft Entra ID.
Enter your Organization name and your Initial domain name. Copy the full URL of your directory. You'll use the URL to add user accounts later in this tutorial. (For example: azuresampledirectory.onmicrosoft.com.)

Copy the full URL of your directory. You'll use the URL to add user accounts later in this tutorial. (For example: azuresampledirectory.onmicrosoft.com.).

When you've finished, select Create. It will take a few minutes to create the new resource.
When complete, select the displayed link to access the new directory.
Copy the Tenant ID. You'll use the ID value to configure your application.properties file later in this tutorial.

Add an application registration for your Spring Boot app

From the portal menu, select App registrations, and then select Register an application.
Specify your application, and then select Register.
When the page for your app registration appears, copy your Application (client) ID and the Directory (tenant) ID. You'll use these values to configure your application.properties file later in this tutorial.
Select Certificates & secrets in the navigation pane. Then, select New client secret.
Add a Description and select duration in the Expires list. Select Add. The value for the key will be automatically filled in.
Copy and save the value of the client secret to configure your application.properties file later in this tutorial. (You won't be able to retrieve this value later.)
From the main page for your app registration, select Authentication, and select Add a platform. Then select Web applications.
Enter http://localhost:8080/login/oauth2/code/ as a new Redirect URI, and then select Configure.
If you've modified the pom.xml file to use a Microsoft Entra starter version earlier than 3.0.0: under Implicit grant and hybrid flows, select ID tokens (used for implicit and hybrid flows), then select Save.

Add a user account to your directory, and add that account to an appRole

From the Overview page of your Active Directory, select Users, and then select New user.
When the User panel is displayed, enter the User name and Name. Then select Create.

Note

You need to specify your directory URL from earlier in this tutorial when you enter the user name. For example:

test-user@azuresampledirectory.onmicrosoft.com
From the main page for your app registration, select App roles, then select Create app role. Provide values for the form fields, select Do you want to enable this app role?, then select Apply.
From the Overview page of your Microsoft Entra directory, select Enterprise applications.
Select All applications, then select the application you added the app role to in a previous step.
Select Users and groups, then select Add user/group.
Under Users, select None Selected. Select the user you created earlier, select Select, then select Assign. If you created more than one app role earlier, select a role.
Go back to the Users panel, select your test user, and select Reset password, and copy the password. You'll use the password when you log into your application later in this tutorial.

Configure and compile your app

Extract the files from the project archive you created and downloaded earlier in this tutorial into a directory.
Navigate to the src/main/resources folder in your project, then open the application.properties file in a text editor.

Specify the settings for your app registration using the values you created earlier. For example:

# Enable related features.
spring.cloud.azure.active-directory.enabled=true
# Specifies your Active Directory ID:
spring.cloud.azure.active-directory.profile.tenant-id=<tenant-ID>
# Specifies your App Registration's Application ID:
spring.cloud.azure.active-directory.credential.client-id=<client-ID>
# Specifies your App Registration's secret key:
spring.cloud.azure.active-directory.credential.client-secret=<client-secret>

Where:

Parameter	Description
`spring.cloud.azure.active-directory.enabled`	Enable the features provided by spring-cloud-azure-starter-active-directory
`spring.cloud.azure.active-directory.profile.tenant-id`	Contains your Active Directory's Directory ID from earlier.
`spring.cloud.azure.active-directory.credential.client-id`	Contains the Application ID from your app registration that you completed earlier.
`spring.cloud.azure.active-directory.credential.client-secret`	Contains the Value from your app registration key that you completed earlier.

Save and close the application.properties file.
Create a folder named controller in the Java source folder for your application. For example: src/main/java/com/wingtiptoys/security/controller.
Create a new Java file named HelloController.java in the controller folder and open it in a text editor.

Enter the following code, then save and close the file:

package com.wingtiptoys.security;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.security.access.prepost.PreAuthorize;

@RestController
public class HelloController {
     @GetMapping("Admin")
     @ResponseBody
     @PreAuthorize("hasAuthority('APPROLE_Admin')")
     public String Admin() {
         return "Admin message";
     }
}

Build and test your app

Open a command prompt and change directory to the folder where your app's pom.xml file is located.
Build your Spring Boot application with Maven and run it. For example:
```
mvn clean package
mvn spring-boot:run
```
After your application is built and started by Maven, open http://localhost:8080/Admin in a web browser. You should be prompted for a user name and password.

Note

You may be prompted to change your password if this is the first login for a new user account.
After you've logged in successfully, you should see the sample "Admin message" text from the controller.

Summary

In this tutorial, you created a new Java web application using the Microsoft Entra starter, configured a new Microsoft Entra tenant, registered a new application in the tenant, and then configured your application to use the Spring annotations and classes to protect the web app.

Next steps

To learn more about Spring and Azure, continue to the Spring on Azure documentation center.

Spring on Azure

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