nl.surfnet.mujina.spring.security.CustomAuthenticationProvider.java Source code

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Here is the source code for nl.surfnet.mujina.spring.security.CustomAuthenticationProvider.java

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/*
 * Copyright 2012 SURFnet bv, The Netherlands
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package nl.surfnet.mujina.spring.security;

import java.util.Arrays;
import java.util.Collection;

import nl.surfnet.mujina.model.AuthenticationMethod;
import nl.surfnet.mujina.model.IdpConfiguration;
import nl.surfnet.mujina.model.SimpleAuthentication;

import org.springframework.beans.factory.annotation.Autowired;
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.security.core.GrantedAuthority;
import org.springframework.security.core.authority.GrantedAuthorityImpl;

public class CustomAuthenticationProvider implements AuthenticationProvider {

    @Autowired
    private IdpConfiguration idpConfiguration;

    @SuppressWarnings("serial")
    @Override
    public Authentication authenticate(final Authentication authentication) throws AuthenticationException {
        final String name = authentication.getName();
        final String password = authentication.getCredentials().toString();

        /*
         * First check if we know this user. Fallback user if Method.ALL otherwise
         * an Exception
         */
        Authentication authenticationForUser = getAuthenticationForUser(name, password);
        if (idpConfiguration.getAuthentication() == AuthenticationMethod.Method.ALL) {
            return authenticationForUser != null ? authenticationForUser
                    : new SimpleAuthentication(name, password,
                            Arrays.asList((GrantedAuthority) new GrantedAuthorityImpl("ROLE_USER"),
                                    (GrantedAuthority) new GrantedAuthorityImpl("ROLE_ADMIN")));
        } else {
            if (authenticationForUser == null) {
                throw new AuthenticationException("Can not log in") {
                };
            }
            return authenticationForUser;

        }
    }

    private Authentication getAuthenticationForUser(String name, String password) {
        final Collection<SimpleAuthentication> users = idpConfiguration.getUsers();
        for (SimpleAuthentication user : users) {
            if (user.getPrincipal().equals(name) && user.getCredentials().equals(password)) {
                return user;
            }
        }
        return null;
    }

    @SuppressWarnings("rawtypes")
    @Override
    public boolean supports(final Class method) {
        return method.equals(UsernamePasswordAuthenticationToken.class);
    }
}