2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2018 Ericsson. All rights reserved.
4 * Copyright (C) 2019 Nordix Foundation.
5 * Modifications Copyright (C) 2020-2021 AT&T Inc.
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.distribution.reception.decoding.policy.file;
25 import java.io.IOException;
26 import java.nio.file.Path;
27 import java.nio.file.Paths;
28 import java.util.ArrayList;
29 import java.util.Collection;
30 import java.util.Enumeration;
31 import java.util.zip.ZipEntry;
32 import java.util.zip.ZipFile;
33 import org.onap.policy.common.parameters.ParameterService;
34 import org.onap.policy.common.utils.coder.CoderException;
35 import org.onap.policy.common.utils.coder.StandardCoder;
36 import org.onap.policy.distribution.model.Csar;
37 import org.onap.policy.distribution.model.PolicyInput;
38 import org.onap.policy.distribution.reception.decoding.PolicyDecoder;
39 import org.onap.policy.distribution.reception.decoding.PolicyDecodingException;
40 import org.onap.policy.models.tosca.authorative.concepts.ToscaEntity;
41 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
44 * This class extracts policy files from a CSAR file.
46 * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
48 public class PolicyDecoderFileInCsarToPolicy implements PolicyDecoder<Csar, ToscaEntity> {
50 private PolicyDecoderFileInCsarToPolicyParameterGroup decoderParameters;
51 private StandardCoder coder;
57 public void configure(final String parameterGroupName) {
58 decoderParameters = ParameterService.get(parameterGroupName);
59 coder = new StandardCoder();
66 public boolean canHandle(final PolicyInput policyInput) {
67 return policyInput.getClass().isAssignableFrom(Csar.class);
74 public Collection<ToscaEntity> decode(final Csar csar) throws PolicyDecodingException {
75 final Collection<ToscaEntity> policyList = new ArrayList<>();
77 try (ZipFile zipFile = new ZipFile(csar.getCsarPath())) {
78 final Enumeration<? extends ZipEntry> entries = zipFile.entries();
79 while (entries.hasMoreElements()) {
80 final ZipEntry entry = entries.nextElement();
81 if (isZipEntryValid(entry, csar.getCsarPath())) {
82 final ToscaServiceTemplate policy =
83 coder.decode(zipFile.getInputStream(entry), ToscaServiceTemplate.class);
84 policyList.add(policy);
87 } catch (final IOException | CoderException exp) {
88 throw new PolicyDecodingException("Failed decoding the policy", exp);
95 * Method to filter out Policy type and Policy files. In addition,
96 * ensures validation of entries in the Zipfile. Attempts to solve path
97 * injection java security issues.
99 * @param entry the ZipEntry to check
100 * @param csarPath Absolute path to the csar the ZipEntry is in
101 * @return true if no injection detected, and it is a policy type or policy file.
103 private boolean isZipEntryValid(ZipEntry entry, String csarPath) {
105 // We only care about policy types and policies
107 if (entry.getName().contains(decoderParameters.getPolicyTypeFileName())
108 || entry.getName().contains(decoderParameters.getPolicyFileName())) {
110 // Now ensure that there is no path injection
112 Path path = Path.of(csarPath, entry.getName()).normalize();
113 return path.startsWith(csarPath);