POLICY-SDK-APP/src/main/java/org/onap/policy/admin/CheckPDP.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP Policy Engine
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.policy.admin;
  22
  23
  24 import java.io.FileInputStream;
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.nio.charset.StandardCharsets;
  28 import java.nio.file.Path;
  29 import java.nio.file.Paths;
  30 import java.util.ArrayList;
  31 import java.util.Arrays;
  32 import java.util.Base64;
  33 import java.util.Collection;
  34 import java.util.Collections;
  35 import java.util.HashMap;
  36 import java.util.List;
  37 import java.util.Properties;
  38
  39 import org.onap.policy.common.logging.flexlogger.FlexLogger;
  40 import org.onap.policy.common.logging.flexlogger.Logger;
  41 import org.onap.policy.rest.XACMLRestProperties;
  42 import org.onap.policy.xacml.api.XACMLErrorConstants;
  43
  44 import com.att.research.xacml.util.XACMLProperties;
  45
  46 public class CheckPDP {
  47         private static Path pdpPath = null;
  48         private static Long oldModified = null;
  49         private static HashMap<String, String> pdpMap = null;
  50         private static final Logger LOGGER = FlexLogger.getLogger(CheckPDP.class);
  51
  52         private CheckPDP(){
  53                 //default constructor
  54         }
  55         public static boolean validateID(String id) {
  56                 // ReadFile
  57                 try {
  58                         readFile();
  59                 } catch (Exception e) {
  60                         LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
  61                         return false;
  62                 }
  63                 // Check ID
  64                 return pdpMap.containsKey(id);
  65         }
  66
  67         private static void readFile(){
  68                 String pdpFile = null;
  69                 try{
  70                         pdpFile = XACMLProperties.getProperty(XACMLRestProperties.PROP_PDP_IDFILE);
  71                 }catch (Exception e){
  72                         LOGGER.error(XACMLErrorConstants.ERROR_DATA_ISSUE + "Cannot read the PDP ID File" + e);
  73                         return;
  74                 }
  75                 if (pdpFile == null) {
  76                         LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "PDP File name not Valid : " + pdpFile);
  77                 }
  78                 if (pdpPath == null) {
  79                         pdpPath = Paths.get(pdpFile);
  80                         if (!pdpPath.toFile().exists()) {
  81                                 LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "File doesn't exist in the specified Path : "     + pdpPath.toString());
  82
  83                         }
  84                         if (pdpPath.toString().endsWith(".properties")) {
  85                                 readProps();
  86                         } else {
  87                                 LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "Not a .properties file " + pdpFile);
  88                         }
  89                 }
  90                 // Check if File is updated recently
  91                 else {
  92                         Long newModified = pdpPath.toFile().lastModified();
  93                         if (!newModified.equals(oldModified)) {
  94                                 // File has been updated.
  95                                 readProps();
  96                         }
  97                 }
  98         }
  99
 100         @SuppressWarnings({ "unchecked", "rawtypes" })
 101         private static void readProps() {
 102                 Properties pdpProp;
 103                 pdpProp = new Properties();
 104                 try {
 105                         InputStream in = new FileInputStream(pdpPath.toFile());
 106                         oldModified = pdpPath.toFile().lastModified();
 107                         pdpProp.load(in);
 108                         // Read the Properties and Load the PDPs and encoding.
 109                         pdpMap = new HashMap<>();
 110                         // Check the Keys for PDP_URLs
 111                         Collection<Object> unsorted = pdpProp.keySet();
 112                         List<String> sorted = new ArrayList(unsorted);
 113                         Collections.sort(sorted);
 114                         for (String propKey : sorted) {
 115                                 loadPDPProperties(propKey, pdpProp);
 116                         }
 117                         if (pdpMap == null || pdpMap.isEmpty()) {
 118                                 LOGGER.debug(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "Cannot Proceed without PDP_URLs");
 119                         }
 120                         in.close();
 121                 } catch (IOException e) {
 122                         LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
 123                 }
 124         }
 125
 126         private static void loadPDPProperties(String propKey, Properties pdpProp){
 127                 if (propKey.startsWith("PDP_URL")) {
 128                         String checkVal = pdpProp.getProperty(propKey);
 129                         if (checkVal == null) {
 130                                 LOGGER.error("Properties file doesn't have the PDP_URL parameter");
 131                         }
 132                         if (checkVal != null && checkVal.contains(";")) {
 133                                 List<String> pdpDefault = new ArrayList<>(Arrays.asList(checkVal.split("\\s*;\\s*")));
 134                                 int pdpCount = 0;
 135                                 while (pdpCount < pdpDefault.size()) {
 136                                         String pdpVal = pdpDefault.get(pdpCount);
 137                                         readPDPParam(pdpVal);
 138                                         pdpCount++;
 139                                 }
 140                         }
 141                 }
 142         }
 143
 144         private static void readPDPParam(String pdpVal){
 145                 if(pdpVal.contains(",")){
 146                         List<String> pdpValues = new ArrayList<>(Arrays.asList(pdpVal.split("\\s*,\\s*")));
 147                         if(pdpValues.size()==3){
 148                                 // 1:2 will be UserID:Password
 149                                 String userID = pdpValues.get(1);
 150                                 String pass = pdpValues.get(2);
 151                                 Base64.Encoder encoder = Base64.getEncoder();
 152                                 // 0 - PDPURL
 153                                 pdpMap.put(pdpValues.get(0), encoder.encodeToString((userID+":"+pass).getBytes(StandardCharsets.UTF_8)));
 154                         }else{
 155                                 LOGGER.error(XACMLErrorConstants.ERROR_PERMISSIONS + "No Credentials to send Request: " + pdpValues);
 156                         }
 157                 }else{
 158                         LOGGER.error(XACMLErrorConstants.ERROR_PERMISSIONS + "No Credentials to send Request: " + pdpVal);
 159                 }
 160         }
 161
 162         public static String getEncoding(String pdpID){
 163                 try {
 164                         readFile();
 165                 } catch (Exception e) {
 166                         LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
 167                 }
 168                 String encoding = null;
 169                 if(pdpMap!=null && (!pdpMap.isEmpty())){
 170                         try{
 171                                 encoding = pdpMap.get(pdpID);
 172                         } catch(Exception e){
 173                                 LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
 174                         }
 175                         return encoding;
 176                 }else{
 177                         return null;
 178                 }
 179         }
 180 }