Spring Security custom authentication provider's authenticate() method is not working - spring

Question

I followed the article Using Custom Authentication Provider Spring Security adding a custom authentication provider in Spring Security.
I found that if I POST to /login, it is redirected to /login.
My custom Authentication Provider's authenticate() is not called.
Even if I use Spring Security's TestingAuthenticationProvider, POST to /login still get redirected to /login.
Is there some thing wrong with my WebSecurityConfigure? This is my configure.
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/", "/webjars/**").permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginPage("/login")
.permitAll()
.and()
.logout()
.permitAll();
}
I use Spring Boot. Do I need to modify the application.properties file? Is there any working sample project on using custom authentication provider?

Answer 1

Have you tried using
http.authorizeRequests()
.antMatchers("/", "/webjars/**").permitAll()
.anyRequest().authenticated()
.and()
.httpBasic();
in your WebSecurityConfigure?
You will get a generated login-window that is using your CustomAuthenticationProvider as soon as you are trying to call a page you have not included in
.antMatchers("/", "/webjars/**").permitAll().