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Spring-Boot-Security: Custom Authenticator

I am starting with Spring-Boot and have an application with WebSecurity. Its working fine, I have InMemory Authentication with static user/passwords.

Now I have no need for DB or LDAP or …

public void configure (AuthenticationManagerBuilder auth) throws Exception
    auth.inMemoryAuthentication ()
        .withUser ("sam").
        .password (passwordEncoder ().encode ("secret"))
        .authorities ("ROLE_USER");

But I want to build a custom authenticator that uses dynamic data (e.g. password has current time in it).

How to implement a custom authenticator? How can I see username and password and implement a check?

Thanks for help!



To provide custom authentication you can refer to this link and for seeing the username and password to check you can use principal object like this

 Object principal= SecurityContextHolder.getContext().getAuthentication().getPrincipal();

Let me know if you need more info

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