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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2020 Bell Canada. 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdp.xacml.application.common.std;
import com.att.research.xacml.api.Attribute;
import com.att.research.xacml.api.AttributeValue;
import com.att.research.xacml.api.DataTypeException;
import com.att.research.xacml.api.Identifier;
import com.att.research.xacml.api.XACML3;
import com.att.research.xacml.api.pip.PIPException;
import com.att.research.xacml.api.pip.PIPFinder;
import com.att.research.xacml.api.pip.PIPRequest;
import com.att.research.xacml.api.pip.PIPResponse;
import com.att.research.xacml.std.StdMutableAttribute;
import com.att.research.xacml.std.datatypes.DataTypes;
import com.att.research.xacml.std.pip.StdMutablePIPResponse;
import com.att.research.xacml.std.pip.StdPIPRequest;
import com.att.research.xacml.std.pip.engines.StdConfigurableEngine;
import java.math.BigInteger;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.Properties;
import javax.persistence.EntityManager;
import javax.persistence.Persistence;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@NoArgsConstructor(access = AccessLevel.PROTECTED)
public abstract class StdOnapPip extends StdConfigurableEngine {
protected static Logger logger = LoggerFactory.getLogger(StdOnapPip.class);
protected static final PIPRequest PIP_REQUEST_ACTOR = new StdPIPRequest(
XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE,
ToscaDictionary.ID_RESOURCE_GUARD_ACTOR,
XACML3.ID_DATATYPE_STRING);
protected static final PIPRequest PIP_REQUEST_RECIPE = new StdPIPRequest(
XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE,
ToscaDictionary.ID_RESOURCE_GUARD_RECIPE,
XACML3.ID_DATATYPE_STRING);
protected static final PIPRequest PIP_REQUEST_TARGET = new StdPIPRequest(
XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE,
ToscaDictionary.ID_RESOURCE_GUARD_TARGETID,
XACML3.ID_DATATYPE_STRING);
protected Properties properties;
protected EntityManager em;
protected String issuer;
protected boolean shutdown = false;
@Override
public Collection<PIPRequest> attributesProvided() {
return Collections.emptyList();
}
@Override
public synchronized void configure(String id, Properties properties) throws PIPException {
//
// This most likely will never get called since configure is called
// upon startup.
//
if (this.shutdown) {
throw new PIPException("Engine is shutdown.");
}
super.configure(id, properties);
logger.info("Configuring historyDb PIP {}", properties);
this.properties = properties;
//
// Create our entity manager
//
em = null;
try {
//
// In case there are any overloaded properties for the JPA
//
var emProperties = new Properties();
emProperties.putAll(properties);
//
// Create the entity manager factory
//
em = Persistence.createEntityManagerFactory(
properties.getProperty(this.issuer + ".persistenceunit"),
emProperties).createEntityManager();
} catch (Exception e) {
logger.error("Persistence failed {} operations history db", e.getLocalizedMessage(), e);
}
}
@Override
public synchronized void shutdown() {
if (this.em != null) {
this.em.close();
this.em = null;
}
this.shutdown = true;
}
protected String getAttribute(PIPFinder pipFinder, PIPRequest pipRequest) {
//
// Get the actor value
//
var pipResponse = this.getAttribute(pipRequest, pipFinder);
if (pipResponse == null) {
logger.error("Need actor attribute which is not found");
return null;
}
//
// Find the actor
//
return findFirstAttributeValue(pipResponse);
}
protected PIPResponse getAttribute(PIPRequest pipRequest, PIPFinder pipFinder) {
PIPResponse pipResponse = null;
try {
pipResponse = pipFinder.getMatchingAttributes(pipRequest, this);
if (pipResponse.getStatus() != null && !pipResponse.getStatus().isOk()) {
logger.info("get attribute error retrieving {}: {}", pipRequest.getAttributeId(),
pipResponse.getStatus());
pipResponse = null;
}
if (pipResponse != null && pipResponse.getAttributes().isEmpty()) {
logger.info("No value for {}", pipRequest.getAttributeId());
pipResponse = null;
}
} catch (PIPException ex) {
logger.error("PIPException getting subject-id attribute", ex);
}
return pipResponse;
}
protected String findFirstAttributeValue(PIPResponse pipResponse) {
for (Attribute attribute: pipResponse.getAttributes()) {
Iterator<AttributeValue<String>> iterAttributeValues = attribute.findValues(DataTypes.DT_STRING);
while (iterAttributeValues.hasNext()) {
String value = iterAttributeValues.next().getValue();
if (value != null) {
return value;
}
}
}
return null;
}
protected void addIntegerAttribute(StdMutablePIPResponse stdPipResponse, Identifier category,
Identifier attributeId, int value, PIPRequest pipRequest) {
AttributeValue<BigInteger> attributeValue = null;
try {
attributeValue = makeInteger(value);
} catch (Exception e) {
logger.error("Failed to convert {} to integer", value, e);
}
if (attributeValue != null) {
stdPipResponse.addAttribute(new StdMutableAttribute(category, attributeId, attributeValue,
pipRequest.getIssuer(), false));
}
}
protected void addLongAttribute(StdMutablePIPResponse stdPipResponse, Identifier category,
Identifier attributeId, long value, PIPRequest pipRequest) {
AttributeValue<BigInteger> attributeValue = null;
try {
attributeValue = makeLong(value);
} catch (Exception e) {
logger.error("Failed to convert {} to long", value, e);
}
if (attributeValue != null) {
stdPipResponse.addAttribute(new StdMutableAttribute(category, attributeId, attributeValue,
pipRequest.getIssuer(), false));
}
}
protected void addStringAttribute(StdMutablePIPResponse stdPipResponse, Identifier category, Identifier attributeId,
String value, PIPRequest pipRequest) {
AttributeValue<String> attributeValue = null;
try {
attributeValue = makeString(value);
} catch (Exception ex) {
logger.error("Failed to convert {} to an AttributeValue<String>", value, ex);
}
if (attributeValue != null) {
stdPipResponse.addAttribute(new StdMutableAttribute(category, attributeId, attributeValue,
pipRequest.getIssuer(), false));
}
}
// these may be overridden by junit tests
protected AttributeValue<BigInteger> makeInteger(int value) throws DataTypeException {
return DataTypes.DT_INTEGER.createAttributeValue(value);
}
protected AttributeValue<BigInteger> makeLong(long value) throws DataTypeException {
return DataTypes.DT_INTEGER.createAttributeValue(value);
}
protected AttributeValue<String> makeString(String value) throws DataTypeException {
return DataTypes.DT_STRING.createAttributeValue(value);
}
}
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