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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 Amdocs
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.sa.auth;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.onap.aai.cl.api.Logger;
import org.onap.aai.cl.eelf.LoggerFactory;
import org.onap.aai.sa.searchdbabstraction.util.SearchDbConstants;
public class SearchDbServiceAuthCore {
private static Logger logger = LoggerFactory.getInstance().getLogger(SearchDbServiceAuthCore.class.getName());
private static String authFileName = SearchDbConstants.SDB_AUTH_CONFIG_FILENAME;
private enum HTTP_METHODS {
POST,
GET,
PUT,
DELETE
}
private static boolean usersInitialized = false;
private static HashMap<String, SearchDbAuthUser> users;
private static Timer timer = null;
// Don't instantiate
private SearchDbServiceAuthCore() {}
public static synchronized void init() {
if (SearchDbServiceAuthCore.authFileName == null) {
SearchDbServiceAuthCore.authFileName = "/home/aaiadmin/etc/aaipolicy.json";
}
SearchDbServiceAuthCore.reloadUsers();
}
public static void cleanup() {
timer.cancel();
}
public static synchronized void reloadUsers() {
users = new HashMap<>();
ObjectMapper mapper = new ObjectMapper(); // can reuse, share globally
JSONParser parser = new JSONParser();
try {
parser.parse(new FileReader(authFileName));
JsonNode rootNode = mapper.readTree(new File(authFileName));
JsonNode rolesNode = rootNode.path("roles");
for (JsonNode roleNode : rolesNode) {
String roleName = roleNode.path("name").asText();
TabularAuthRole authRole = new TabularAuthRole();
JsonNode usersNode = roleNode.path("users");
JsonNode functionsNode = roleNode.path("functions");
for (JsonNode functionNode : functionsNode) {
String function = functionNode.path("name").asText();
JsonNode methodsNode = functionNode.path("methods");
boolean hasMethods = false;
for (JsonNode methodNode : methodsNode) {
String methodName = methodNode.path("name").asText();
hasMethods = true;
String thisFunction = methodName + ":" + function;
authRole.addAllowedFunction(thisFunction);
}
if (!hasMethods) {
// iterate the list from HTTP_METHODS
for (HTTP_METHODS meth : HTTP_METHODS.values()) {
String thisFunction = meth.toString() + ":" + function;
authRole.addAllowedFunction(thisFunction);
}
}
}
for (JsonNode userNode : usersNode) {
String username = userNode.path("username").asText().toLowerCase();
SearchDbAuthUser authUser = null;
if (users.containsKey(username)) {
authUser = users.get(username);
} else {
authUser = new SearchDbAuthUser();
}
authUser.setUser(username);
authUser.addRole(roleName, authRole);
users.put(username, authUser);
}
}
} catch (FileNotFoundException fnfe) {
logger.debug("Failed to load the policy file ");
} catch (ParseException e) {
logger.debug("Failed to Parse the policy file ");
} catch (JsonProcessingException e) {
logger.debug("JSON processing error while parsing policy file: " + e.getMessage());
} catch (IOException e) {
logger.debug("IO Exception while parsing policy file: " + e.getMessage());
}
usersInitialized = true;
}
public static class SearchDbAuthUser {
public SearchDbAuthUser() {
this.roles = new HashMap<>();
}
private String username;
private HashMap<String, TabularAuthRole> roles;
public String getUser() {
return this.username;
}
public Map<String, TabularAuthRole> getRoles() {
return this.roles;
}
public void addRole(String roleName, TabularAuthRole authRole) {
this.roles.put(roleName, authRole);
}
public boolean checkAllowed(String checkFunc) {
for (Map.Entry<String, TabularAuthRole> roleEntry : this.roles.entrySet()) {
TabularAuthRole role = roleEntry.getValue();
if (role.hasAllowedFunction(checkFunc)) {
return true;
}
}
return false;
}
public void setUser(String myuser) {
this.username = myuser;
}
}
public static class TabularAuthRole {
public TabularAuthRole() {
this.allowedFunctions = new ArrayList<>();
}
private List<String> allowedFunctions;
public void addAllowedFunction(String func) {
this.allowedFunctions.add(func);
}
public void delAllowedFunction(String delFunc) {
if (this.allowedFunctions.contains(delFunc)) {
this.allowedFunctions.remove(delFunc);
}
}
public boolean hasAllowedFunction(String afunc) {
return this.allowedFunctions.contains(afunc);
}
}
public static Map<String, SearchDbAuthUser> getUsers() {
if (!usersInitialized || (users == null)) {
reloadUsers();
}
return users;
}
public static boolean authorize(String username, String authFunction) {
if (!usersInitialized || (users == null)) {
init();
}
if (users.containsKey(username)) {
return users.get(username).checkAllowed(authFunction);
} else {
return false;
}
}
}
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