Custom authentication in Spring

Question

I have a question. In Struts, I have an Action that deals with user authentication, i.e., I took the user\'s credentials and used a DAO to validate user credentials. I want to m

Answer 1

You can create a custom authentication provider that implements org.springframework.security.authentication.AuthenticationProvider like this

package com.bzone.example;

import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;


public class CustomAuthenticationProvider implements AuthenticationProvider{

    @Override
    public Authentication authenticate(Authentication authentication)
            throws AuthenticationException {
        // TODO call custom service or do whatever you want 
        return null;
    }

    @Override
    public boolean supports(Class authentication) {
        // copied it from AbstractUserDetailsAuthenticationProvider
        return (UsernamePasswordAuthenticationToken.class.isAssignableFrom(authentication));
    }

}

one more step is to configure spring security to use this custom authentication provider