Created
August 20, 2018 22:38
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Authentication Java Config
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package com.demo; | |
import java.util.ArrayList; | |
import java.util.Scanner; | |
import org.springframework.security.authentication.*; | |
import org.springframework.security.core.*; | |
import org.springframework.security.core.authority.SimpleGrantedAuthority; | |
import org.springframework.security.core.context.SecurityContextHolder; | |
import org.springframework.security.core.userdetails.User; | |
import org.springframework.security.core.userdetails.UserDetails; | |
import org.springframework.security.core.userdetails.UserDetailsService; | |
import org.springframework.security.provisioning.InMemoryUserDetailsManager; | |
public class AuthenticationSample { | |
private static AuthenticationManager authenticationManager = new AuthenticationManagerImpl(); | |
public static void main(String[] args) throws Exception | |
{ | |
Scanner sc = new Scanner(System.in); | |
System.out.println("Please enter Username: "); | |
String name = sc.nextLine(); | |
System.out.println("Please enter Password: "); | |
String password = sc.nextLine(); | |
try { | |
Authentication request = new UsernamePasswordAuthenticationToken(name, password); | |
Authentication result = authenticationManager.authenticate(request); | |
SecurityContextHolder.getContext().setAuthentication(result); | |
} catch (AuthenticationException e) { | |
System.out.println("Authentication failed: " + e.getMessage()); | |
System.exit(1); | |
} | |
System.out.println("Successfully authenticated. Security context contains: " | |
+ SecurityContextHolder.getContext().getAuthentication()); | |
} | |
} | |
class AuthenticationManagerImpl implements AuthenticationManager { | |
public UserDetailsService userDetailsService() { | |
InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager(); | |
manager.createUser(User.withUsername("ankidaemon").password("password").roles("ADMIN").build()); | |
manager.createUser(User.withUsername("test").password("password").roles("USER").build()); | |
return manager; | |
} | |
public Authentication authenticate(Authentication auth) throws AuthenticationException { | |
UserDetails user=userDetailsService().loadUserByUsername(auth.getName()); | |
if(user !=null){ | |
if(user.getPassword().equals(auth.getCredentials())){ | |
if(user.getUsername().equals("ankidaemon")){ | |
return new UsernamePasswordAuthenticationToken(auth.getName(), auth.getCredentials(), | |
new ArrayList<GrantedAuthority>(){ | |
{ | |
add(new SimpleGrantedAuthority("ROLE_ADMIN")); | |
} | |
}); | |
} | |
else{ | |
System.out.println("User is"+user.getUsername()); | |
return new UsernamePasswordAuthenticationToken(auth.getName(), auth.getCredentials(), | |
new ArrayList<GrantedAuthority>(){ | |
{ | |
add(new SimpleGrantedAuthority("ROLE_USER")); | |
} | |
}); | |
} | |
} | |
} | |
throw new BadCredentialsException("Bad Credentials"); | |
} | |
} |
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