Java tutorial
/* * The MIT License * * Copyright 2016 Dmitry Noranovich <javaeeeee at gmail dot com>. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.javaeeeee.components; import com.javaeeeee.entities.User; import com.javaeeeee.repositories.UsersRepository; import java.util.Optional; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.security.authentication.AuthenticationCredentialsNotFoundException; import org.springframework.security.authentication.AuthenticationProvider; import org.springframework.security.authentication.UsernamePasswordAuthenticationToken; import org.springframework.security.core.Authentication; import org.springframework.security.core.AuthenticationException; import org.springframework.stereotype.Component; /** * This class is used for basic authentication using credentials stored in a * database. http://www.baeldung.com/spring-security-authentication-provider * * @author Dmitry Noranovich <javaeeeee at gmail dot com> */ @Component public class JpaAuthenticationProvider implements AuthenticationProvider { /** * A user repository. */ @Autowired private UsersRepository usersRepository; @Override public Authentication authenticate(Authentication authentication) throws AuthenticationException { Optional<User> optional = usersRepository.findByUsernameAndPassword(authentication.getName(), authentication.getCredentials().toString()); if (optional.isPresent()) { return new UsernamePasswordAuthenticationToken(authentication.getPrincipal(), authentication.getCredentials(), authentication.getAuthorities()); } else { throw new AuthenticationCredentialsNotFoundException("Wrong credentials."); } } @Override public boolean supports(Class<?> authentication) { return authentication.equals(UsernamePasswordAuthenticationToken.class); } }