What is spring UserDetailsService?

The UserDetailsService interface is used to retrieve user-related data. It has one method named loadUserByUsername() which can be overridden to customize the process of finding the user. It is used by the DaoAuthenticationProvider to load details about the user during authentication.

How will you implement security in spring boot using UserDetailsService?

Example of implementing UserDetailsService

1. What Software/Technologies would you need?
2. Step#1 : Create a Spring Boot Starter Project in STS(Spring Tool Suite)
3. Step#2 : Update database properties in application.
4. Step#5 : Create Service Interface & Service Implementation class.
5. Step#8 : Write UI pages(Thymeleaf)

How do I enable HTTP Security in spring?

The first thing you need to do is add Spring Security to the classpath. The WebSecurityConfig class is annotated with @EnableWebSecurity to enable Spring Security’s web security support and provide the Spring MVC integration.

How do I add authentication to spring boot?

1. Start with Spring Boot and Thymeleaf.
2. Start Your Spring Boot Application.
3. Configure User Authentication in Your Spring Boot App with OAuth 2.0.
4. Add User Authentication via OAuth 2.0 to the Spring Boot Project.
5. Start Your Spring Boot App with OAuth 2.0 SSO.
6. Create the Restricted Controller Method and Thymeleaf Template.

How do you secure REST endpoints in spring boot?

1. Step 1: Generate an access token. Use the following generic command to generate an access token: $ curl client:secret@localhost:8080/oauth/token -d grant_type=password -d username=user -d password=pwd.
2. Step 2: Use the token to access resources through your RESTful API.

How do I enable http and https in Spring boot?

To enable support for HTTP and HTTPS in Spring Boot 2, we need to register an additional connector with Spring Boot application. First, enable SSL/HTTPS for Spring Boot, for example by following the HTTPS using Self-Signed Certificate in Spring Boot tutorial. Now, add server. http.

How do I authenticate REST API in spring boot?

What does anyRequest () authenticated () do?

anyRequest(). authenticated() will restrict the access for any other endpoint other than PUBLIC_URL, and the user must be authenticated.

Can we have multiple WebSecurityConfigurerAdapter?

When using Java configuration, the way to define multiple security realms is to have multiple @Configuration classes that extend the WebSecurityConfigurerAdapter base class – each with its own security configuration. These classes can be static and placed inside the main config.

What is SecurityContextHolder getContext () getAuthentication ()?

The HttpServletRequest.getUserPrincipal() will return the result of SecurityContextHolder.getContext().getAuthentication() . This means it is an Authentication which is typically an instance of UsernamePasswordAuthenticationToken when using username and password based authentication.

What is difference between Authenticationmanager and Authenticationprovider?

The Authentication Manager is only a interface and actual implementation of the authenticate method is provided by the ProviderManager. The ProviderManager has a list of AuthenticationProviders. From it’s authenticate method it calls the authenticate method of the appropriate AuthenticateProvider.

How do I protect my REST API?

2. Best Practices to Secure REST APIs

1. 2.1. Keep it Simple. Secure an API/System – just how secure it needs to be.
2. 2.2. Always Use HTTPS.
3. 2.3. Use Password Hash.
4. 2.4. Never expose information on URLs.
5. 2.5. Consider OAuth.
6. 2.6. Consider Adding Timestamp in Request.
7. 2.7. Input Parameter Validation.

How do you call https endpoint in spring boot?

How to call a REST API protected with SSL (https) from Spring Boot without importing the certificate into java keystore?

1. STEP1: Get the certificates.
2. STEP2: Create a keystore.
3. STEP3: Place the keystore in resources folder:
4. STEP4: Create a custom REST Template.
5. STEP5: Call protected API using custom REST Template.

How do I make REST API https in spring boot?

Spring Boot – Enabling HTTPS

1. Obtain the SSL certificate – Create a self-signed certificate or get one from a Certificate Authority.
2. Enable HTTPS and 443 port.

What is userdetailsservice in Spring Boot?

UserDetailsService is used by DaoAuthenticationProvider for retrieving a username, password, and other attributes for authenticating with a username and password. Spring Security provides in-memory and JDBC implementations of UserDetailsService. You can define custom authentication by exposing a custom UserDetailsService as a bean.

What is the use of userdetailsservice?

UserDetailsService provides the loadUserByUsername to which the username obtained from the login page should be passed and it returns the matching UserDetails. In our Custom UserDetailsService, we will be overriding the loadUserByUsername which reads the local in-memory user details or the user details from the database.

How to load user details from a database table in spring?

With that being said, We will see how we can load user details from a database table. In order to load user information from the database, we need to use spring JDBC or spring JPA. For the sake of completeness, I’m using spring JPA and here is a simple UserAccount and UserRole entities.

How to get user information in customuserdetailsservice?

The UserInformation class holds the username, password, and authority of the users. In our CustomUserDetailsService, we will be querying the Users and Authorities table to get the user information. If the username matches, then it will create and return the UserDetails object with the corresponding username, password, and authority.