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/*-
* ============LICENSE_START=======================================================
* guard
* ================================================================================
* Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
* ================================================================================
* 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.guard;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.common.utils.coder.StandardCoder;
import org.onap.policy.drools.system.PolicyEngine;
import org.onap.policy.models.decisions.concepts.DecisionRequest;
import org.onap.policy.models.decisions.concepts.DecisionResponse;
import org.onap.policy.rest.RestManager;
import org.onap.policy.rest.RestManager.Pair;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class PolicyGuardXacmlHelper {
private static final Logger logger = LoggerFactory.getLogger(PolicyGuardXacmlHelper.class);
private String url;
private String user;
private String pwd;
/**
* Constructor.
*/
public PolicyGuardXacmlHelper() {
this.url = PolicyEngine.manager.getEnvironmentProperty("guard.url");
this.user = PolicyEngine.manager.getEnvironmentProperty("pdpx.username");
this.pwd = PolicyEngine.manager.getEnvironmentProperty("pdpx.password");
}
/**
* Call PDP.
*
* @param xacmlReq the XACML request
* @return the response
*/
public String callPdp(PolicyGuardXacmlRequestAttributes xacmlReq) {
//
// Create a request suitable for API
//
DecisionRequest decisionRequest = new DecisionRequest();
decisionRequest.setOnapName("Policy");
decisionRequest.setOnapComponent("Drools PDP");
decisionRequest.setOnapInstance("usecase template");
decisionRequest.setRequestId(UUID.randomUUID().toString());
decisionRequest.setAction("guard");
Map<String, String> guard = new HashMap<>();
guard.put("actor", xacmlReq.getActorId());
guard.put("recipe", xacmlReq.getOperationId());
guard.put("target", xacmlReq.getTargetId());
if (xacmlReq.getClnameId() != null) {
guard.put("clname", xacmlReq.getClnameId());
}
if (xacmlReq.getVfCount() != null) {
guard.put("vfCount", Integer.toString(xacmlReq.getVfCount()));
}
Map<String, Object> resources = new HashMap<>();
resources.put("guard", guard);
decisionRequest.setResource(resources);
try {
//
// Call RESTful PDP
//
NetLoggerUtil.log(EventType.OUT, CommInfrastructure.REST, this.url, decisionRequest.toString());
String response = callRestfulPdp(decisionRequest);
NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, this.url, response);
return response;
} catch (Exception e) {
logger.error("Exception in sending RESTful request: ", e);
}
return Util.DENY;
}
/**
* This makes an HTTP POST call to a running PDP RESTful servlet to get a decision.
*
* @param decisionRequest The Decision request
* @return response from guard which contains "Permit" or "Deny"
* @throws CoderException Exception when converting to/from JSON the message body
*/
private String callRestfulPdp(DecisionRequest decisionRequest) throws CoderException {
StandardCoder coder = new StandardCoder();
String jsonBody = coder.encode(decisionRequest);
RestManager restManager = new RestManager();
Map<String, String> headers = new HashMap<>();
headers.put("Accepts", "application/json");
logger.info("Guard Decision Request: {}", jsonBody);
Pair<Integer, String> httpDetails = restManager.post(url, user, pwd, headers, "application/json", jsonBody);
if (httpDetails == null) {
logger.error("Guard rest call returned a null pair - defaulting to DENY");
return Util.DENY;
}
logger.info("Guard Decision REST Response {} {}", httpDetails.first, httpDetails.second);
if (httpDetails.first == 200) {
DecisionResponse decision = coder.decode(httpDetails.second, DecisionResponse.class);
logger.info("Guard Decision {}", decision);
return decision.getStatus();
}
return Util.DENY;
}
}
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