ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/restAuth/CheckPDP.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP-PAP-REST
   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.pap.xacml.restAuth;
  22
  23 import java.io.FileInputStream;
  24 import java.io.IOException;
  25 import java.io.InputStream;
  26 import java.nio.charset.StandardCharsets;
  27 import java.nio.file.Files;
  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.eelf.MessageCodes;
  40 import org.onap.policy.common.logging.eelf.PolicyLogger;
  41 import org.onap.policy.common.logging.flexlogger.FlexLogger;
  42 import org.onap.policy.common.logging.flexlogger.Logger;
  43 import org.onap.policy.pap.xacml.rest.XACMLPapServlet;
  44 import org.onap.policy.xacml.api.XACMLErrorConstants;
  45
  46 import com.att.research.xacml.api.pap.PAPException;
  47
  48 public class CheckPDP {
  49
  50         private static Path pdpPath = null;
  51         private static Properties pdpProp = null;
  52         private static Long oldModified = null;
  53         private static Long newModified = null;
  54         private static HashMap<String, String> pdpMap = null;
  55         private static final Logger logger = FlexLogger.getLogger(CheckPDP.class);
  56
  57         public static boolean validateID(String id) {
  58                 // ReadFile
  59                 try {
  60                         readFile();
  61                 } catch (Exception e) {
  62                         PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR, e, "CheckPDP", "Exception reading file");
  63                         return false;
  64                 }
  65                 // Check ID
  66                 if (pdpMap.containsKey(id)) {
  67                         return true;
  68                 }
  69                 return false;
  70         }
  71
  72         private static void readFile() throws PAPException {
  73                 String pdpFile = XACMLPapServlet.getPDPFile();
  74                 if (pdpFile == null) {
  75                         PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR + "PDP File name is undefined");
  76                         throw new PAPException(XACMLErrorConstants.ERROR_SYSTEM_ERROR +"PDP File name not Valid : " + pdpFile);
  77                 }
  78                 if (pdpPath == null) {
  79                         pdpPath = Paths.get(pdpFile);
  80                         if (Files.notExists(pdpPath)) {
  81                                 PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR + "File doesn't exist in the specified Path");
  82                                 throw new PAPException(XACMLErrorConstants.ERROR_SYSTEM_ERROR +"File doesn't exist in the specified Path : "+ pdpPath.toString());
  83                         }
  84                         if (pdpPath.toString().endsWith(".properties")) {
  85                                 readProps();
  86                         } else {
  87                                 PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR + "Not a .properties file");
  88                                 throw new PAPException(XACMLErrorConstants.ERROR_SYSTEM_ERROR +"Not a .properties file");
  89                         }
  90                 }
  91                 // Check if File is updated recently
  92                 else {
  93                         newModified = pdpPath.toFile().lastModified();
  94                         if (newModified != oldModified) {
  95                                 // File has been updated.
  96                                 readProps();
  97                         }
  98                 }
  99         }
 100
 101         @SuppressWarnings({ "rawtypes", "unchecked" })
 102         private static void readProps() throws PAPException {
 103                 InputStream in;
 104                 pdpProp = new Properties();
 105                 try {
 106                         in = new FileInputStream(pdpPath.toFile());
 107                         oldModified = pdpPath.toFile().lastModified();
 108                         pdpProp.load(in);
 109                 } catch (IOException e) {
 110                         PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR, e, "CheckPDP", "Cannot load the Properties file");
 111                         throw new PAPException("Cannot Load the Properties file", e);
 112                 }
 113                 // Read the Properties and Load the PDPs and encoding.
 114                 pdpMap = new HashMap<>();
 115                 // Check the Keys for PDP_URLs
 116                 Collection<Object> unsorted = pdpProp.keySet();
 117                 List<String> sorted = new ArrayList(unsorted);
 118                 Collections.sort(sorted);
 119                 for (String propKey : sorted) {
 120                         if (propKey.startsWith("PDP_URL")) {
 121                                 String check_val = pdpProp.getProperty(propKey);
 122                                 if (check_val == null) {
 123                                         throw new PAPException("Properties file doesn't have the PDP_URL parameter");
 124                                 }
 125                                 if (check_val.contains(";")) {
 126                                         List<String> pdp_default = new ArrayList<>(Arrays.asList(check_val.split("\\s*;\\s*")));
 127                                         int pdpCount = 0;
 128                                         while (pdpCount < pdp_default.size()) {
 129                                                 String pdpVal = pdp_default.get(pdpCount);
 130                                                 readPDPParam(pdpVal);
 131                                                 pdpCount++;
 132                                         }
 133                                 } else {
 134                                         readPDPParam(check_val);
 135                                 }
 136                         }
 137                 }
 138                 if (pdpMap == null || pdpMap.isEmpty()) {
 139                         logger.debug(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "Cannot Proceed without PDP_URLs");
 140                         throw new PAPException(XACMLErrorConstants.ERROR_SYSTEM_ERROR +"Cannot Proceed without PDP_URLs");
 141                 }
 142         }
 143
 144         private static void readPDPParam(String pdpVal) throws PAPException{
 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                                 PolicyLogger.error(MessageCodes.ERROR_PERMISSIONS + "No Credentials to send Request");
 156                                 throw new PAPException(XACMLErrorConstants.ERROR_PERMISSIONS + "No enough Credentials to send Request. " + pdpValues);
 157                         }
 158                 }else{
 159                         PolicyLogger.error(MessageCodes.ERROR_PERMISSIONS + "No Credentials to send Request: " + pdpVal);
 160                         throw new PAPException(XACMLErrorConstants.ERROR_PERMISSIONS +"No enough Credentials to send Request.");
 161                 }
 162         }
 163
 164         public static String getEncoding(String pdpID){
 165                 try {
 166                         readFile();
 167                 } catch (Exception e) {
 168                         PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR, e, "CheckPDP", "Exeption reading Properties file");
 169                 }
 170                 String encoding = null;
 171                 if(pdpMap!=null && (!pdpMap.isEmpty())){
 172                         try{
 173                                 encoding = pdpMap.get(pdpID);
 174                         } catch(Exception e){
 175                                 PolicyLogger.error(MessageCodes.ERROR_SYSTEM_ERROR, e, "CheckPDP", "Exception encoding");
 176                         }
 177                         return encoding;
 178                 }else{
 179                         return null;
 180                 }
 181         }
 182
 183 }