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/*-
* ============LICENSE_START=======================================================
* ONAP Policy Engine
* ================================================================================
* Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
* Modified Copyright (C) 2018 Samsung Electronics Co., Ltd.
* Modifications Copyright (C) 2019 Bell Canada
* ================================================================================
* 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.admin;
import com.att.research.xacml.util.XACMLProperties;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Base64;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
import org.onap.policy.rest.XACMLRestProperties;
import org.onap.policy.utils.PeCryptoUtils;
import org.onap.policy.xacml.api.XACMLErrorConstants;
/**
* What is not good about this class is that once a value has been set for pdpProperties path you cannot change it. That
* may be ok for a highly controlled production environment in which nothing changes, but not a very good
* implementation.
*
* The reset() method has been added to assist with the above problem in order to acquire >80% JUnit code coverage.
*
* This static class doesn't really check a PDP, it simply loads a properties file and tried to ensure that a valid URL
* exists for a PDP along with user/password.
*/
public class CheckPDP {
private static Path pdpPath = null;
private static Long oldModified = null;
private static HashMap<String, String> pdpMap = null;
private static final Logger LOGGER = FlexLogger.getLogger(CheckPDP.class);
private CheckPDP() {
//default constructor
}
public static Map<String, String> getPdpMap() {
return pdpMap;
}
private static void reset() {
pdpPath = null;
oldModified = null;
pdpMap = null;
}
public static boolean validateID(String id) {
// ReadFile
try {
readFile();
} catch (Exception e) {
LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
return false;
}
if (pdpMap == null) {
return false;
}
// Check ID
return pdpMap.containsKey(id);
}
private static void readFile() {
String pdpFile;
try {
pdpFile = XACMLProperties.getProperty(XACMLRestProperties.PROP_PDP_IDFILE);
} catch (Exception e) {
LOGGER.error(XACMLErrorConstants.ERROR_DATA_ISSUE + "Cannot read the PDP ID File" + e);
return;
}
if (pdpFile == null) {
LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "PDP File name not Valid : " + pdpFile);
} else if (pdpPath == null) {
pdpPath = Paths.get(pdpFile);
if (!pdpPath.toString().endsWith(".properties") || !pdpPath.toFile().exists()) {
LOGGER.error(
XACMLErrorConstants.ERROR_SYSTEM_ERROR + "File doesn't exist in the specified Path : " + pdpPath
.toString());
CheckPDP.reset();
return;
}
readProps();
} else { // Check if File is updated recently
Long newModified = pdpPath.toFile().lastModified();
if (!newModified.equals(oldModified)) {
// File has been updated.
readProps();
}
}
}
@SuppressWarnings({"unchecked", "rawtypes"})
private static void readProps() {
Properties pdpProp;
pdpProp = new Properties();
try (InputStream in = new FileInputStream(pdpPath.toFile())) {
oldModified = pdpPath.toFile().lastModified();
pdpProp.load(in);
// Read the Properties and Load the PDPs and encoding.
pdpMap = new HashMap<>();
// Check the Keys for PDP_URLs
Collection<Object> unsorted = pdpProp.keySet();
List<String> sorted = new ArrayList(unsorted);
Collections.sort(sorted);
for (String propKey : sorted) {
loadPDPProperties(propKey, pdpProp);
}
} catch (IOException e) {
LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
}
if (pdpMap == null || pdpMap.isEmpty()) {
LOGGER.debug(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "Cannot Proceed without PDP_URLs");
CheckPDP.reset();
}
}
private static void loadPDPProperties(String propKey, Properties pdpProp) {
if (propKey.startsWith("PDP_URL")) {
String checkVal = pdpProp.getProperty(propKey);
if (checkVal == null) {
LOGGER.error("Properties file doesn't have the PDP_URL parameter");
}
if (checkVal != null && checkVal.contains(";")) {
List<String> pdpDefault = new ArrayList<>(Arrays.asList(checkVal.split("\\s*;\\s*")));
int pdpCount = 0;
while (pdpCount < pdpDefault.size()) {
String pdpVal = pdpDefault.get(pdpCount);
readPDPParam(pdpVal);
pdpCount++;
}
}
}
}
private static void readPDPParam(String pdpVal) {
if (pdpVal.contains(",")) {
List<String> pdpValues = new ArrayList<>(Arrays.asList(pdpVal.split("\\s*,\\s*")));
if (pdpValues.size() == 3) {
// 1:2 will be UserID:Password
String userID = pdpValues.get(1);
String pass = PeCryptoUtils.decrypt(pdpValues.get(2));
Base64.Encoder encoder = Base64.getEncoder();
// 0 - PDPURL
pdpMap.put(pdpValues.get(0),
encoder.encodeToString((userID + ":" + pass).getBytes(StandardCharsets.UTF_8)));
} else {
LOGGER.error(XACMLErrorConstants.ERROR_PERMISSIONS + "No Credentials to send Request: " + pdpValues);
}
} else {
LOGGER.error(XACMLErrorConstants.ERROR_PERMISSIONS + "No Credentials to send Request: " + pdpVal);
}
}
public static String getEncoding(String pdpID) {
try {
readFile();
} catch (Exception e) {
LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
}
String encoding = null;
if (pdpMap != null && (!pdpMap.isEmpty())) {
try {
encoding = pdpMap.get(pdpID);
} catch (Exception e) {
LOGGER.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
}
return encoding;
} else {
return null;
}
}
}
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