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/*-
* ============LICENSE_START=======================================================
* ONAP-PAP-REST
* ================================================================================
* Copyright (C) 2017, 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.policy.pap.xacml.rest.components;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.onap.policy.common.logging.eelf.PolicyLogger;
import org.onap.policy.controlloop.policy.guard.ControlLoopGuard;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;
public class SafePolicyBuilder {
private SafePolicyBuilder() {
// Private Constructor.
}
public static ControlLoopGuard loadYamlGuard(String specification) {
//
// Read the yaml into our Java Object
//
PolicyLogger.info("Requested YAML to convert : " + specification);
Yaml yaml = new Yaml(new Constructor(ControlLoopGuard.class));
Object obj = yaml.load(specification);
return (ControlLoopGuard) obj;
}
public static String generateXacmlGuard(String xacmlFileContent, Map<String, String> generateMap,
List<String> blacklist, List<String> targets) {
// Setup default values and Targets.
StringBuilder targetRegex = new StringBuilder(".*|");
if (targets != null && !targets.isEmpty()) {
targetRegex = new StringBuilder();
for (String t : targets) {
targetRegex.append(t + "|");
}
}
if (generateMap.get("clname") == null || generateMap.get("clname").isEmpty()) {
generateMap.put("clname", ".*");
}
generateMap.put("targets", targetRegex.toString().substring(0, targetRegex.length() - 1));
// Replace values.
for (Map.Entry<String, String> map : generateMap.entrySet()) {
Pattern p = Pattern.compile("\\$\\{" + map.getKey() + "\\}");
Matcher m = p.matcher(xacmlFileContent);
String finalInput = map.getValue();
if (finalInput.contains("$")) {
finalInput = finalInput.replace("$", "\\$");
}
xacmlFileContent = m.replaceAll(finalInput);
}
if (blacklist != null && !blacklist.isEmpty()) {
StringBuilder rule = new StringBuilder();
for (String blackListName : blacklist) {
if (blackListName.contains("$")) {
blackListName = blackListName.replace("$", "\\$");
}
rule.append("<AttributeValue DataType=\"http://www.w3.org/2001/XMLSchema#string\">" + blackListName
+ "</AttributeValue>");
}
Pattern p = Pattern.compile("\\$\\{blackListElement\\}");
Matcher m = p.matcher(xacmlFileContent);
xacmlFileContent = m.replaceAll(rule.toString());
}
PolicyLogger.info("Generated XACML from the YAML Spec: \n" + xacmlFileContent);
return xacmlFileContent;
}
}
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