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/*-
* ============LICENSE_START=======================================================
* PolicyEngineUtils
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* Modified Copyright (C) 2018 Samsung Electronics Co., Ltd.
* ================================================================================
* 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.utils;
import java.security.Principal;
import java.util.Properties;
import org.apache.log4j.Logger;
import org.onap.aaf.cadi.Access.Level;
import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.cadi.PropAccess;
import org.onap.aaf.cadi.aaf.AAFPermission;
import org.onap.aaf.cadi.aaf.v2_0.AAFAuthn;
import org.onap.aaf.cadi.aaf.v2_0.AAFCon;
import org.onap.aaf.cadi.aaf.v2_0.AAFConHttp;
import org.onap.aaf.cadi.aaf.v2_0.AAFLurPerm;
import org.onap.aaf.cadi.locator.PropertyLocator;
import org.onap.aaf.cadi.principal.UnAuthPrincipal;
/**
* AAF Client: Generic AAF Client implementation to connect to AAF Resources to
* validate permissions and authorization.
*
*/
public class AAFPolicyClientImpl implements AAFPolicyClient {
private static Logger logger = Logger.getLogger(AAFPolicyClientImpl.class.getName());
private static final String ENVIRONMENT = "ENVIRONMENT";
private static AAFPolicyClientImpl instance = null;
private static Properties cadiprops = new Properties();
private static AAFCon<?> aafCon = null;
private static AAFLurPerm aafLurPerm = null;
private static AAFAuthn<?> aafAuthn = null;
private static PropAccess access = null;
private AAFPolicyClientImpl(Properties properties) throws AAFPolicyException {
setup(properties);
}
/**
* Gets the instance of the AAFClient instance. Needs Proper properties with
* CLIENT_ID, CLIENT_KEY and ENVIRONMENT
*
* @param properties
* Properties with CLIENT_ID, CLIENT_KEY and ENVIRONMENT
* @return AAFClient instance.
* @throws AAFPolicyException
* Exceptions.
*/
public static synchronized AAFPolicyClientImpl getInstance(Properties properties) throws AAFPolicyException {
if (instance == null) {
logger.info("Creating AAFClient Instance ");
instance = new AAFPolicyClientImpl(properties);
}
return instance;
}
// To set Property values && Connections.
private static void setup(Properties properties) throws AAFPolicyException {
if (properties != null && !properties.isEmpty()) {
cadiprops = properties;
access = new PolicyAccess(cadiprops,
Level.valueOf(cadiprops.getProperty("cadi_loglevel", Level.DEBUG.toString())));
} else {
logger.error("Required Property value is missing : " + ENVIRONMENT);
throw new AAFPolicyException("Required Property value is missing : " + ENVIRONMENT);
}
setUpAAF();
}
/**
* Updates the Properties file in case if required.
*
* @param properties
* Properties with CLIENT_ID, CLIENT_KEY and ENVIRONMENT
* @throws AAFPolicyException
* exceptions if any.
*/
@Override
public void updateProperties(Properties properties) throws AAFPolicyException {
setup(properties);
}
/**
* Checks the Authentication and Permissions for the given values.
*
* @param userName
* Username must be registered under the Name space.
* @param pass
* Password pertaining to the Username.
* @param type
* Permissions Type.
* @param instance
* Permissions Instance.
* @param action
* Permissions Action.
* @return
*/
@Override
public boolean checkAuthPerm(String userName, String pass, String type, String instance, String action) {
return checkAuth(userName, pass) && checkPerm(userName, pass, type, instance, action);
}
/**
* Checks the Authentication of the UserName and Password Given.
*
* @param userName
* UserName
* @param pass
* Password.
* @return True or False.
*/
@Override
public boolean checkAuth(String userName, String pass) {
if (aafAuthn == null) {
return false;
}
try {
int i = 0;
do {
String aafAuthResponse = aafAuthn.validate(userName, pass);
if (aafAuthResponse==null) {
return true;
} else {
logger.warn("User, " + userName + ", failed to authenticate with AAF. \n"
+ "AAF Response is " + aafAuthResponse);
}
i++;
} while (i < 2);
} catch (Exception e) {
logger.error(e.getMessage() + e);
}
return false;
}
/**
* Checks Permissions for the given UserName, Password and Type, Instance
* Action.
*
* @param userName
* UserName
* @param pass
* Password.
* @param type
* Permissions Type.
* @param instance
* Permissions Instance.
* @param action
* Permissions Action.
* @return True or False.
*/
@Override
public boolean checkPerm(String userName, String pass, String type, String instance, String action) {
int i = 0;
Boolean result = false;
do {
if (aafCon != null && aafLurPerm != null) {
try {
aafCon.basicAuth(userName, pass);
AAFPermission perm = new AAFPermission(cadiprops.getProperty("policy.aaf.namespace"), type,
instance, action);
final Principal p = new UnAuthPrincipal(userName);
result = aafLurPerm.fish(p, perm);
} catch (CadiException e) {
logger.error(e.getMessage() + e);
aafLurPerm.destroy();
}
}
i++;
} while (i < 2 && !result); // Try once more to check if this can be passed. AAF has some issues.
return result;
}
private static boolean setUpAAF() {
try {
aafCon = new AAFConHttp(access,
new PropertyLocator("https://" + cadiprops.getProperty("aaf_fqdn") + ":8100"));
aafLurPerm = aafCon.newLur();
aafAuthn = aafCon.newAuthn(aafLurPerm);
return true;
} catch (Exception e) {
logger.error("Error while setting up AAF Connection " + e.getMessage() + e);
return false;
}
}
}
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