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Overview

Azure Active Directory (Azure AD) B2C is an identity management service that enables you to customize and control how customers sign up, sign in, and manage their profiles when using your applications. Azure AD B2C enables these actions while protecting the identities of your customers at the same time.

Prerequisites

The following prerequisites are required in order 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 https://aka.ms/azure-jdks.
  • Apache Maven, version 3.0 or later.
  • Azure subscription.

If you don't have an Azure subscription, create a free account before you begin.

Create Azure Active Directory instance

Create the Active Directory instance

  1. Log into https://portal.azure.com.

  2. Click +Create a resource, then Identity, and then Azure Active Directory B2C.

  3. Enter your Organization name and your Initial domain name, record the domain name as your ${your-tenant-name} and click Create.

  4. Select your account name on the top-right of the Azure portal toolbar, then click Switch directory.

  5. Select your new Azure Active Directory from the drop-down menu.

  6. Search b2c and click Azure AD B2C service.

Add an application registration for your Spring Boot app

  1. Select Azure AD B2C from the portal menu, click Applications, and then click Add.

  2. Specify your application Name, add http://localhost:8080/home for the Reply URL, record the Application ID as your ${your-client-id} and then click Save.

  3. Select Keys from your application, click Generate key to generate ${your-client-secret} and then Save.

  4. Select User flows on your left, and then Click **New user flow **.

  5. Choose Sign up or in, Profile editing and Password reset to create user flows respectively. Specify your user flow Name and User attributes and claims, click Create.

Configure and compile your app

  1. Extract the files from the project archive you created and downloaded earlier in this tutorial into a directory.

  2. Navigate to the parent folder for your project, and open the pom.xml Maven project file in a text editor.

  3. Add the dependencies for Spring OAuth2 security to the pom.xml:

    <dependency>
    <groupId>com.microsoft.azure</groupId>
    <artifactId>azure-active-directory-b2c-spring-boot-starter</artifactId>
    <version>2.1.7</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
    <groupId>org.thymeleaf.extras</groupId>
    <artifactId>thymeleaf-extras-springsecurity5</artifactId>
</dependency>

  4. Save and close the pom.xml file.

  5. Navigate to the src/main/resources folder in your project and open the application.yml file in a text editor.

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

    azure:
  activedirectory:
    b2c:
      tenant: ${your-tenant-name}
      client-id: ${your-client-id}
      client-secret: ${your-client-secret}
      reply-url: ${your-reply-url-from-aad} # should be absolute url.
      logout-success-url: ${you-logout-success-url}
      user-flows:
        sign-up-or-sign-in: ${your-sign-up-or-in-user-flow}
        profile-edit: ${your-profile-edit-user-flow}     # optional
        password-reset: ${your-password-reset-user-flow} # optional

    Where:

    Parameter Description
    azure.activedirectory.b2c.tenant Contains your AD B2C's ${your-tenant-name from earlier.
    azure.activedirectory.b2c.client-id Contains the ${your-client-id} from your application that you completed earlier.
    azure.activedirectory.b2c.client-secret Contains the ${your-client-secret} from your application that you completed earlier.
    azure.activedirectory.b2c.reply-url Contains one of the Reply URL from your application that you completed earlier.
    azure.activedirectory.b2c.logout-success-url Specify the URL when your application logout successfully.
    azure.activedirectory.b2c.user-flows Contains the name of the user flows that you completed earlier.

  7. Save and close the application.yml file.

  8. Create a folder named controller in the Java source folder for your application.

  9. Create a new Java file named HelloController.java in the controller folder and open it in a text editor.

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

    package sample.aad.controller;

import org.springframework.security.oauth2.client.authentication.OAuth2AuthenticationToken;
import org.springframework.security.oauth2.core.user.OAuth2User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class WebController {

    private void initializeModel(Model model, OAuth2AuthenticationToken token) {
        if (token != null) {
            final OAuth2User user = token.getPrincipal();

            model.addAttribute("grant_type", user.getAuthorities());
            model.addAllAttributes(user.getAttributes());
        }
    }

    @GetMapping(value = "/")
    public String index(Model model, OAuth2AuthenticationToken token) {
        initializeModel(model, token);

        return "home";
    }

    @GetMapping(value = "/greeting")
    public String greeting(Model model, OAuth2AuthenticationToken token) {
        initializeModel(model, token);

        return "greeting";
    }

    @GetMapping(value = "/home")
    public String home(Model model, OAuth2AuthenticationToken token) {
        initializeModel(model, token);

        return "home";
    }
}

  11. Create a folder named security in the Java source folder for your application.

  12. Create a new Java file named WebSecurityConfig.java in the security folder and open it in a text editor.

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

    package sample.aad.security;

import com.microsoft.azure.spring.autoconfigure.b2c.AADB2COidcLoginConfigurer;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@EnableWebSecurity
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    private final AADB2COidcLoginConfigurer configurer;

    public WebSecurityConfiguration(AADB2COidcLoginConfigurer configurer) {
        this.configurer = configurer;
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .anyRequest()
                .authenticated()
                .and()
                .apply(configurer)
        ;
    }
}

  14. Copy the greeting.html and home.html from Azure AD B2C Spring Boot Sample, and replace the ${your-profile-edit-user-flow} and ${your-password-reset-user-flow} with your user flow name respectively that completed earlier.

Build and test your app

  1. Open a command prompt and change directory to the folder where your app's pom.xml file is located.

  2. Build your Spring Boot application with Maven and run it; for example:

    mvn clean package
mvn spring-boot:run

  3. After your application is built and started by Maven, open http://localhost:8080/ in a web browser; you should be redirected to login page.

  4. Click linke with name of ${your-sign-up-or-in} user flow, you should be rediected Azure AD B2C to start the authentication process.

  5. After you have logged in successfully, you should see the sample home page from the browser.

Allow telemetry

Microsoft would like to collect data about how users use this Spring boot starter. Microsoft uses this information to improve our tooling experience. Participation is voluntary. If you don't want to participate, just simply disable it by setting below configuration in application.properties.

azure.activedirectory.b2c.allow-telemetry=false

When telemetry is enabled, an HTTP request will be sent to URL https://dc.services.visualstudio.com/v2/track. So please make sure it's not blocked by your firewall.

Find more information about Azure Service Privacy Statement, please check Microsoft Online Services Privacy Statement.

Summary

In this documentation, you created a new Java web application using the Azure Active Directory B2C starter, configured a new Azure AD B2C tenant and registered a new application in it, and then configured your application to use the Spring annotations and classes to protect the web app.