2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2019 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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 * SPDX-License-Identifier: Apache-2.0
20 * ============LICENSE_END=========================================================
23 package org.onap.policy.pdp.xacml.application.common;
25 import com.att.research.xacml.api.Identifier;
26 import com.att.research.xacml.util.XACMLProperties;
29 import java.io.FileInputStream;
30 import java.io.FileOutputStream;
31 import java.io.IOException;
32 import java.io.InputStream;
33 import java.io.OutputStream;
34 import java.nio.file.Files;
35 import java.nio.file.Path;
36 import java.nio.file.Paths;
37 import java.util.Map.Entry;
38 import java.util.Properties;
40 import java.util.StringJoiner;
41 import java.util.stream.Collectors;
43 import oasis.names.tc.xacml._3_0.core.schema.wd_17.IdReferenceType;
44 import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObjectFactory;
45 import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicySetType;
46 import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
47 import oasis.names.tc.xacml._3_0.core.schema.wd_17.TargetType;
49 import org.slf4j.Logger;
50 import org.slf4j.LoggerFactory;
52 public class XacmlPolicyUtils {
54 private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPolicyUtils.class);
55 private static final String DOT_FILE_SUFFIX = ".file";
56 private static final String NOT_FOUND_MESSAGE = "NOT FOUND";
58 private XacmlPolicyUtils() {
63 * Creates an empty PolicySetType object given the id and combining algorithm. Note,there
64 * will also be an empty Target created. You can easily override that if need be.
66 * @param policyId Policy Id
67 * @param policyCombiningAlgorithm Policy Combining Algorithm
68 * @return PolicySetType object
70 public static PolicySetType createEmptyPolicySet(String policyId, Identifier policyCombiningAlgorithm) {
71 PolicySetType policy = new PolicySetType();
72 policy.setPolicySetId(policyId);
73 policy.setPolicyCombiningAlgId(policyCombiningAlgorithm.stringValue());
74 policy.setTarget(new TargetType());
79 * Creates an empty PolicySetType object given the id and combining algorithm. Note,there
80 * will also be an empty Target created. You can easily override that if need be.
82 * @param policyId Policy Id
83 * @param ruleCombiningAlgorithm Rule Combining Algorithm
84 * @return PolicyType object
86 public static PolicyType createEmptyPolicy(String policyId, Identifier ruleCombiningAlgorithm) {
87 PolicyType policy = new PolicyType();
88 policy.setPolicyId(policyId);
89 policy.setRuleCombiningAlgId(ruleCombiningAlgorithm.stringValue());
90 policy.setTarget(new TargetType());
95 * This method adds a list of PolicyType objects to a root PolicySetType as
96 * referenced policies.
98 * @param rootPolicy Root PolicySet being updated
99 * @param referencedPolicies A list of PolicyType being added as a references
100 * @return the rootPolicy PolicySet object
102 public static PolicySetType addPoliciesToXacmlRootPolicy(PolicySetType rootPolicy,
103 PolicyType... referencedPolicies) {
104 ObjectFactory factory = new ObjectFactory();
106 // Iterate each policy
108 for (PolicyType referencedPolicy : referencedPolicies) {
109 IdReferenceType reference = new IdReferenceType();
110 reference.setValue(referencedPolicy.getPolicyId());
114 rootPolicy.getPolicySetOrPolicyOrPolicySetIdReference().add(factory.createPolicyIdReference(reference));
117 // Return the updated object
123 * This method updates a root PolicySetType by adding in a PolicyType as a reference.
125 * @param rootPolicy Root PolicySet being updated
126 * @param referencedPolicySets A list of PolicySetType being added as a references
127 * @return the rootPolicy PolicySet object
129 public static PolicySetType addPolicySetsToXacmlRootPolicy(PolicySetType rootPolicy,
130 PolicySetType... referencedPolicySets) {
131 ObjectFactory factory = new ObjectFactory();
133 // Iterate each policy
135 for (PolicySetType referencedPolicySet : referencedPolicySets) {
136 IdReferenceType reference = new IdReferenceType();
137 reference.setValue(referencedPolicySet.getPolicySetId());
141 rootPolicy.getPolicySetOrPolicyOrPolicySetIdReference().add(factory.createPolicySetIdReference(reference));
144 // Return the updated object
150 * Adds in the root policy to the PDP properties object.
152 * @param properties Input properties
153 * @param rootPolicyPath Path to the root policy file
154 * @return Properties object
156 public static Properties addRootPolicy(Properties properties, Path rootPolicyPath) {
158 // Get the current set of referenced policy ids
160 Set<String> rootPolicies = XACMLProperties.getRootPolicyIDs(properties);
162 // Construct a unique id
166 String refId = "root" + id;
167 if (rootPolicies.contains(refId)) {
170 rootPolicies.add(refId);
171 properties.put(refId + DOT_FILE_SUFFIX, rootPolicyPath.toAbsolutePath().toString());
176 // Set the new comma separated list
178 properties.setProperty(XACMLProperties.PROP_ROOTPOLICIES,
179 rootPolicies.stream().collect(Collectors.joining(",")));
184 * Adds in the referenced policy to the PDP properties object.
186 * @param properties Input properties
187 * @param refPolicyPath Path to the referenced policy file
188 * @return Properties object
190 public static Properties addReferencedPolicy(Properties properties, Path refPolicyPath) {
192 // Get the current set of referenced policy ids
194 Set<String> referencedPolicies = XACMLProperties.getReferencedPolicyIDs(properties);
196 // Construct a unique id
200 String refId = "ref" + id;
201 if (referencedPolicies.contains(refId)) {
204 referencedPolicies.add(refId);
205 properties.put(refId + DOT_FILE_SUFFIX, refPolicyPath.toAbsolutePath().toString());
210 // Set the new comma separated list
212 properties.setProperty(XACMLProperties.PROP_REFERENCEDPOLICIES,
213 referencedPolicies.stream().collect(Collectors.joining(",")));
218 * Removes a referenced policy from the Properties object. Both in the line
219 * that identifies the policy and the .file property that points to the path.
221 * @param properties Input Properties object to remove
222 * @param refPolicyPath The policy file path
223 * @return Properties object
225 public static Properties removeReferencedPolicy(Properties properties, Path refPolicyPath) {
227 // Get the current set of referenced policy ids
229 StringJoiner join = new StringJoiner(",");
230 boolean found = false;
231 Set<String> referencedPolicies = XACMLProperties.getReferencedPolicyIDs(properties);
232 for (String refPolicy : referencedPolicies) {
233 String refPolicyFile = refPolicy + DOT_FILE_SUFFIX;
235 // If the key and value match, then it will return true
237 if (properties.remove(refPolicyFile, refPolicyPath.toString())) {
239 // Record that we actually removed it
254 // Now update the list of referenced properties
256 properties.setProperty(XACMLProperties.PROP_REFERENCEDPOLICIES, join.toString());
262 * Does a debug dump of referenced and root policy values.
264 * @param properties Input Properties object
265 * @param logger Logger object to use
267 public static void debugDumpPolicyProperties(Properties properties, Logger logger) {
269 // I hate surrounding this all with an if, but by
270 // doing so I clear sonar issues with passing System.lineSeparator()
273 if (logger.isDebugEnabled()) {
275 // Get the current set of referenced policy ids
277 Set<String> rootPolicies = XACMLProperties.getRootPolicyIDs(properties);
278 logger.debug("Root Policies: {}", properties.getProperty(XACMLProperties.PROP_ROOTPOLICIES));
279 for (String root : rootPolicies) {
280 logger.debug("{}", properties.getProperty(root + DOT_FILE_SUFFIX, NOT_FOUND_MESSAGE));
283 // Get the current set of referenced policy ids
285 Set<String> referencedPolicies = XACMLProperties.getReferencedPolicyIDs(properties);
286 logger.debug("Referenced Policies: {}", properties.getProperty(XACMLProperties.PROP_REFERENCEDPOLICIES));
287 for (String ref : referencedPolicies) {
288 logger.debug("{}", properties.getProperty(ref + DOT_FILE_SUFFIX, NOT_FOUND_MESSAGE));
294 * Constructs a unique policy filename for a given policy.
296 * <P>It could be dangerous to use policy-id and policy-version if the user
297 * gives us an invalid policy-id and policy-versions.
299 * <P>Should we append a UUID also to guarantee uniqueness?
301 * <P>How do we track that in case we need to know what policies we have loaded?
303 * @param policy PolicyType object
304 * @param path Path for policy
305 * @return Path unique file path for the Policy
307 public static Path constructUniquePolicyFilename(PolicyType policy, Path path) {
310 // Can it be possible to produce an invalid filename?
311 // Should we insert a UUID
313 String filename = policy.getPolicyId() + "_" + policy.getVersion() + ".xml";
315 // Construct the Path
317 return Paths.get(path.toAbsolutePath().toString(), filename);
321 * Load properties from given file.
323 * @throws IOException If unable to read file
325 public static Properties loadXacmlProperties(Path propertyPath) throws IOException {
326 LOGGER.debug("Loading xacml properties {}", propertyPath);
327 try (InputStream is = Files.newInputStream(propertyPath)) {
328 Properties properties = new Properties();
330 if (LOGGER.isDebugEnabled()) {
331 LOGGER.debug("Loaded xacml properties {} {}", System.lineSeparator(), properties);
332 for (Entry<Object, Object> entrySet : properties.entrySet()) {
333 LOGGER.debug("{} -> {}", entrySet.getKey(), entrySet.getValue());
341 * Stores the XACML Properties to the given file location.
343 * @throws IOException If unable to store the file.
345 public static void storeXacmlProperties(Properties properties, Path propertyPath) throws IOException {
346 if (LOGGER.isDebugEnabled()) {
347 LOGGER.debug("Storing xacml properties {} {} {}", properties, System.lineSeparator(), propertyPath);
349 try (OutputStream os = Files.newOutputStream(propertyPath)) {
350 String strComments = "#";
351 properties.store(os, strComments);
356 * Appends 'xacml.properties' to a root Path object
358 * @param rootPath Root Path object
359 * @return Path to rootPath/xacml.properties file
361 public static Path getPropertiesPath(Path rootPath) {
362 return Paths.get(rootPath.toAbsolutePath().toString(), "xacml.properties");
366 public interface FileCreator {
367 public File createAFile(String filename) throws IOException;
372 * Copies a xacml.properties file to another location and all the policies defined within it.
374 * @param propertiesPath Path to an existing properties file
375 * @param properties Properties object
376 * @param creator A callback that can create files. Allows JUnit test to pass Temporary folder
377 * @return File object that points to new Properties file
378 * @throws IOException Could not read/write files
380 public static File copyXacmlPropertiesContents(String propertiesPath, Properties properties,
381 FileCreator creator) throws IOException {
383 // Open the properties file
385 try (InputStream is = new FileInputStream(propertiesPath)) {
387 // Load in the properties
391 // Now we create a new xacml.properties in the temporary folder location
393 File propertiesFile = creator.createAFile("xacml.properties");
395 // Iterate through any root policies defined
397 for (String root : XACMLProperties.getRootPolicyIDs(properties)) {
401 Path rootPath = Paths.get(properties.getProperty(root + DOT_FILE_SUFFIX));
402 LOGGER.debug("Root file {} {}", rootPath, rootPath.getFileName());
404 // Construct new path for the root policy
406 File newRootPath = creator.createAFile(rootPath.getFileName().toString());
408 // Copy the policy file to the temporary folder
410 com.google.common.io.Files.copy(rootPath.toFile(), newRootPath);
412 // Change the properties object to point to where the new policy is
413 // in the temporary folder
415 properties.setProperty(root + DOT_FILE_SUFFIX, newRootPath.getAbsolutePath());
418 // Iterate through any referenced policies defined
420 for (String referenced : XACMLProperties.getReferencedPolicyIDs(properties)) {
424 Path refPath = Paths.get(properties.getProperty(referenced + DOT_FILE_SUFFIX));
425 LOGGER.debug("Referenced file {} {}", refPath, refPath.getFileName());
427 // Construct new path for the root policy
429 File newReferencedPath = creator.createAFile(refPath.getFileName().toString());
431 // Copy the policy file to the temporary folder
433 com.google.common.io.Files.copy(refPath.toFile(), newReferencedPath);
435 // Change the properties object to point to where the new policy is
436 // in the temporary folder
438 properties.setProperty(referenced + DOT_FILE_SUFFIX, newReferencedPath.getAbsolutePath());
441 // Save the new properties file to the temporary folder
443 try (OutputStream os = new FileOutputStream(propertiesFile.getAbsolutePath())) {
444 properties.store(os, "");
447 // Return the new path to the properties folder
449 return propertiesFile;