org.apache.atlas.web.security.AtlasPamAuthenticationProvider.java Source code

Introduction

Here is the source code for org.apache.atlas.web.security.AtlasPamAuthenticationProvider.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.atlas.web.security;

import org.apache.atlas.ApplicationProperties;
import org.apache.atlas.web.model.User;
import org.apache.commons.configuration.ConfigurationConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.authentication.jaas.DefaultJaasAuthenticationProvider;
import org.springframework.security.authentication.jaas.memory.InMemoryConfiguration;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;

import javax.security.auth.login.AppConfigurationEntry;
import javax.security.auth.login.Configuration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

@Component
public class AtlasPamAuthenticationProvider extends AtlasAbstractAuthenticationProvider {
    private static Logger logger = LoggerFactory.getLogger(AtlasPamAuthenticationProvider.class);

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        Authentication auth = getPamAuthentication(authentication);
        if (auth != null && auth.isAuthenticated()) {
            return auth;
        } else {
            throw new AtlasAuthenticationException("PAM Authentication Failed");
        }
    }

    private Authentication getPamAuthentication(Authentication authentication) {
        try {
            DefaultJaasAuthenticationProvider jaasAuthenticationProvider = new DefaultJaasAuthenticationProvider();
            String loginModuleName = "org.apache.atlas.web.security.PamLoginModule";
            AppConfigurationEntry.LoginModuleControlFlag controlFlag = AppConfigurationEntry.LoginModuleControlFlag.REQUIRED;
            Properties properties = ConfigurationConverter
                    .getProperties(ApplicationProperties.get().subset("atlas.authentication.method.pam"));
            Map<String, String> options = new HashMap<>();
            for (String key : properties.stringPropertyNames()) {
                String value = properties.getProperty(key);
                options.put(key, value);
            }
            if (!options.containsKey("service"))
                options.put("service", "atlas-login");
            AppConfigurationEntry appConfigurationEntry = new AppConfigurationEntry(loginModuleName, controlFlag,
                    options);
            AppConfigurationEntry[] appConfigurationEntries = new AppConfigurationEntry[] { appConfigurationEntry };
            Map<String, AppConfigurationEntry[]> appConfigurationEntriesOptions = new HashMap<String, AppConfigurationEntry[]>();
            appConfigurationEntriesOptions.put("SPRINGSECURITY", appConfigurationEntries);
            Configuration configuration = new InMemoryConfiguration(appConfigurationEntriesOptions);
            jaasAuthenticationProvider.setConfiguration(configuration);
            UserAuthorityGranter authorityGranter = new UserAuthorityGranter();
            UserAuthorityGranter[] authorityGranters = new UserAuthorityGranter[] { authorityGranter };
            jaasAuthenticationProvider.setAuthorityGranters(authorityGranters);
            jaasAuthenticationProvider.afterPropertiesSet();

            String userName = authentication.getName();
            String userPassword = "";
            if (authentication.getCredentials() != null) {
                userPassword = authentication.getCredentials().toString();
            }

            // getting user authenticated
            if (userName != null && userPassword != null && !userName.trim().isEmpty()
                    && !userPassword.trim().isEmpty()) {
                final List<GrantedAuthority> grantedAuths = getAuthorities(userName);

                final UserDetails principal = new User(userName, userPassword, grantedAuths);

                final Authentication finalAuthentication = new UsernamePasswordAuthenticationToken(principal,
                        userPassword, grantedAuths);

                authentication = jaasAuthenticationProvider.authenticate(finalAuthentication);
                authentication = getAuthenticationWithGrantedAuthority(authentication);
                return authentication;
            } else {
                return authentication;
            }

        } catch (Exception e) {
            logger.debug("Pam Authentication Failed:", e);
        }
        return authentication;
    }

}