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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.config.aaf;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.apache.commons.io.IOUtils;
import org.onap.aai.Profiles;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.filter.OrderedRequestContextFilter;
import org.springframework.context.annotation.Profile;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
/**
* AAF authorization filter
*/
@Component
@Profile(Profiles.AAF_AUTHENTICATION)
@PropertySource("file:${server.local.startpath}/aaf/permissions.properties")
public class AafAuthorizationFilter extends OrderedRequestContextFilter {
private static final EELFLogger logger = EELFManager.getInstance().getLogger(AafAuthorizationFilter.class.getName());
private static final String ADVANCED = "advanced";
private static final String BASIC = "basic";
private static final String ECHO_ENDPOINT = "^.*/util/echo$";
@Value("${permission.type}")
String type;
@Value("${permission.instance}")
String instance;
public AafAuthorizationFilter() {
this.setOrder(FilterPriority.AAF_AUTHORIZATION.getPriority());
}
@Override
protected void doFilterInternal(HttpServletRequest req, HttpServletResponse response, FilterChain filterChain) throws IOException, ServletException {
PayloadBufferingRequestWrapper request = new PayloadBufferingRequestWrapper(req);
if(request.getRequestURI().matches(ECHO_ENDPOINT)){
filterChain.doFilter(request, response);
}
String payload = IOUtils.toString(request.getInputStream(), StandardCharsets.UTF_8.name());
boolean containsWordGremlin = payload.contains("\"gremlin\"");
//if the request contains the word "gremlin" it's an "advanced" query needing an "advanced" role
String permissionBasic = String.format("%s|%s|%s", type, instance, ADVANCED);
String permissionAdvanced = String.format("%s|%s|%s", type, instance, BASIC);
boolean isAuthorized;
if(containsWordGremlin){
isAuthorized = request.isUserInRole(permissionAdvanced);
}else{
isAuthorized = request.isUserInRole(permissionAdvanced) || request.isUserInRole(permissionBasic);
}
if(!isAuthorized){
String name = request.getUserPrincipal() != null ? request.getUserPrincipal().getName() : "unknown";
logger.info("User " + name + " does not have a role for " + (containsWordGremlin ? "gremlin" : "non-gremlin") + " query" );
response.setStatus(403);
}else{
filterChain.doFilter(request,response);
}
}
}
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