--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.xacml.pdp.application.guard;
+
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.util.XACMLPolicyScanner;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.UUID;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
+
+import org.apache.commons.io.IOUtils;
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.Constructor;
+
+public class CoordinationGuardTranslator implements ToscaPolicyTranslator {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(CoordinationGuardTranslator.class);
+
+ public CoordinationGuardTranslator() {
+ super();
+ }
+
+ @Override
+ public PolicyType convertPolicy(ToscaPolicy toscaPolicy) throws ToscaPolicyConversionException {
+ LOGGER.debug("Using CoordinationGuardTranslator.convertPolicy");
+ //
+ // Policy name should be at the root
+ //
+ String policyName = toscaPolicy.getMetadata().get("policy-id");
+ String type = toscaPolicy.getType();
+ String coordinationFunctionPath = "src/main/resources/coordination/function";
+ Map<String, Object> policyProps = toscaPolicy.getProperties();
+ LOGGER.debug("path = {}", coordinationFunctionPath);
+ LOGGER.debug("props = {}", policyProps);
+ List<String> controlLoop = (List<String>) policyProps.get("controlLoop");
+ CoordinationDirective cd = new CoordinationDirective();
+ cd.setCoordinationFunction(type);
+ cd.setControlLoop(controlLoop);
+ LOGGER.debug("CoordinationDirective = {}", cd);
+
+ String xacmlStr = generateXacmlFromCoordinationDirective(cd, coordinationFunctionPath);
+
+ LOGGER.debug("xacmlStr\n{}", xacmlStr);
+ PolicyType scannedPolicy = null;
+ try (InputStream is = new ByteArrayInputStream(xacmlStr.getBytes(StandardCharsets.UTF_8))) {
+ scannedPolicy = (PolicyType) XACMLPolicyScanner.readPolicy(is);
+ } catch (IOException e) {
+ LOGGER.error("Failed to read policy", e);
+ }
+ return scannedPolicy;
+ }
+
+ @Override
+ public Request convertRequest(DecisionRequest request) {
+ LOGGER.info("this convertRequest shouldn't be used");
+ return null;
+ }
+
+ @Override
+ public DecisionResponse convertResponse(Response xacmlResponse) {
+ LOGGER.info("this convertRequest shouldn't be used");
+ return null;
+ }
+
+ /**
+ * Load YAML coordination directive.
+ *
+ * @param directiveFilename yaml directive file to load
+ * @return the CoordinationDirective
+ */
+ public static CoordinationDirective loadCoordinationDirectiveFromFile(String directiveFilename) {
+ try (InputStream is = new FileInputStream(new File(directiveFilename))) {
+ String contents = IOUtils.toString(is, StandardCharsets.UTF_8);
+ //
+ // Read the yaml into our Java Object
+ //
+ Yaml yaml = new Yaml(new Constructor(CoordinationDirective.class));
+ Object obj = yaml.load(contents);
+
+ LOGGER.debug(contents);
+
+ return (CoordinationDirective) obj;
+ } catch (IOException e) {
+ LOGGER.error("Error while loading YAML coordination directive", e);
+ }
+ return null;
+ }
+
+ /**
+ * Generate Xacml rule implementing specified CoordinationDirective.
+ *
+ * @param cd the CoordinationDirective
+ * @param protoDir the directory containing Xacml implementation prototypes
+ * @return the generated Xacml policy
+ */
+ public static String generateXacmlFromCoordinationDirective(CoordinationDirective cd,
+ String protoDir) {
+ /*
+ * Determine file names
+ */
+ String xacmlProtoFilename = protoDir + File.separator + cd.getCoordinationFunction() + ".xml";
+ LOGGER.debug("xacmlProtoFilename={}", xacmlProtoFilename);
+ /*
+ * Values to be used for placeholders
+ */
+ final String uniqueId = UUID.randomUUID().toString();
+ final String cLOne = cd.getControlLoop(0);
+ final String cLTwo = cd.getControlLoop(1);
+ /*
+ * Replace prototype placeholders with appropriate values
+ */
+ String xacmlPolicy = null;
+ try (Stream<String> stream = Files.lines(Paths.get(xacmlProtoFilename))) {
+ xacmlPolicy = stream.map(s -> s.replaceAll("UNIQUE_ID", uniqueId))
+ .map(s -> s.replaceAll("CONTROL_LOOP_ONE", cLOne))
+ .map(s -> s.replaceAll("CONTROL_LOOP_TWO", cLTwo))
+ .collect(Collectors.joining(System.lineSeparator()));
+ } catch (IOException e) {
+ LOGGER.error("Error while generating XACML policy for coordination directive", e);
+ }
+ return xacmlPolicy;
+ }
+
+}
Code Review / policy / xacml-pdp.git / blobdiff