ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/components/SafePolicyBuilder.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 package org.onap.policy.pap.xacml.rest.components;
  21
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.regex.Matcher;
  25 import java.util.regex.Pattern;
  26
  27 import org.onap.policy.common.logging.eelf.PolicyLogger;
  28 import org.onap.policy.controlloop.policy.guard.ControlLoopGuard;
  29 import org.yaml.snakeyaml.Yaml;
  30 import org.yaml.snakeyaml.constructor.Constructor;
  31
  32 public class SafePolicyBuilder {
  33
  34         private SafePolicyBuilder(){
  35                 //Private Constructor.
  36         }
  37
  38         public static ControlLoopGuard loadYamlGuard(String specification) {
  39                 //
  40                 // Read the yaml into our Java Object
  41                 //
  42                 PolicyLogger.info("Requested YAML to convert : " + specification);
  43                 Yaml yaml = new Yaml(new Constructor(ControlLoopGuard.class));
  44                 Object obj = yaml.load(specification);
  45                 return (ControlLoopGuard) obj;
  46         }
  47
  48         public static String generateXacmlGuard(String xacmlFileContent,Map<String, String> generateMap, List<String> blacklist, List<String> targets) {
  49                 //Setup default values and Targets.
  50                 StringBuilder targetRegex= new StringBuilder(".*|");
  51                 if(targets!=null && !targets.isEmpty()){
  52                         targetRegex = new StringBuilder();
  53             for(String t : targets){
  54                 targetRegex.append(t + "|");
  55             }
  56                 }
  57                 if(generateMap.get("clname")==null|| generateMap.get("clname").isEmpty()){
  58                         generateMap.put("clname",".*");
  59                 }
  60                 generateMap.put("targets", targetRegex.toString().substring(0, targetRegex.length()-1));
  61                 // Replace values.
  62                 for(Map.Entry<String,String> map: generateMap.entrySet()){
  63                         Pattern p = Pattern.compile("\\$\\{" +map.getKey() +"\\}");
  64                         Matcher m = p.matcher(xacmlFileContent);
  65                         String finalInput = map.getValue();
  66                         if(finalInput.contains("$")){
  67                                 finalInput = finalInput.replace("$", "\\$");
  68                         }
  69                         xacmlFileContent=m.replaceAll(finalInput);
  70                 }
  71                 if(blacklist!=null && !blacklist.isEmpty()){
  72                         StringBuilder rule = new StringBuilder();
  73                         for(String blackListName : blacklist){
  74                                 if(blackListName.contains("$")){
  75                                         blackListName = blackListName.replace("$", "\\$");
  76                                 }
  77                                 rule.append("<AttributeValue DataType=\"http://www.w3.org/2001/XMLSchema#string\">"+blackListName+"</AttributeValue>");
  78                         }
  79                         Pattern p = Pattern.compile("\\$\\{blackListElement\\}");
  80                         Matcher m = p.matcher(xacmlFileContent);
  81                         xacmlFileContent=m.replaceAll(rule.toString());
  82                 }
  83                 PolicyLogger.info("Generated XACML from the YAML Spec: \n" + xacmlFileContent);
  84                 return xacmlFileContent;
  85         }
  86 }