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/**
* ============LICENSE_START====================================================
* org.onap.ccsdk
* ===========================================================================
* Copyright (c) 2023 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.ccsdk.apps.cadi.filter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.FilterConfig;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import org.onap.ccsdk.apps.cadi.Access;
import org.onap.ccsdk.apps.cadi.Access.Level;
import org.onap.ccsdk.apps.cadi.ServletContextAccess;
import org.onap.ccsdk.apps.cadi.config.Config;
import org.onap.ccsdk.apps.cadi.util.Split;
/**
* This filter allows one to protect the APIs from data stored in AAF
*
* @author Instrumental(Jonathan)
*/
public class CadiApiEnforcementFilter implements Filter {
private String type;
private Map<String,List<String>> publicPaths;
private Access access;
public CadiApiEnforcementFilter(Access access, String enforce) throws ServletException {
this.access = access;
init(enforce);
}
@Override
public void init(FilterConfig fc) throws ServletException {
init(fc.getInitParameter(Config.CADI_API_ENFORCEMENT));
// need the Context for Logging, instantiating ClassLoader, etc
ServletContextAccess sca=new ServletContextAccess(fc);
if (access==null) {
access = sca;
}
}
private void init(final String ptypes) throws ServletException {
if(ptypes==null) {
throw new ServletException("CadiApiEnforcement requires " + Config.CADI_API_ENFORCEMENT + " property");
}
String[] full = Split.splitTrim(';', ptypes);
if(full.length==0) {
throw new ServletException(Config.CADI_API_ENFORCEMENT + " property is empty");
}
if(full.length>0) {
type=full[0];
}
publicPaths = new TreeMap<String,List<String>>();
if(full.length>1) {
for(int i=1;i<full.length;++i) {
String pubArray[] = Split.split(':', full[i]);
if(pubArray.length==2) {
List<String> ls = publicPaths.get(pubArray[0]);
if(ls==null) {
ls = new ArrayList<String>();
publicPaths.put(pubArray[0], ls);
}
ls.add(pubArray[1]);
}
}
}
}
@Override
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain fc) throws IOException, ServletException {
HttpServletRequest hreq = (HttpServletRequest)req;
final String meth = hreq.getMethod();
String path = hreq.getContextPath()+hreq.getPathInfo();
if(path == null || path.isEmpty() || "null".equals(path))
path = hreq.getRequestURI().substring(hreq.getContextPath().length());
List<String> list = publicPaths.get(meth);
if(list!=null) {
for( String p : publicPaths.get(meth)) {
if(path.startsWith(p)) {
access.printf(Level.INFO, "%s accessed public API %s %s\n",
hreq.getUserPrincipal().getName(),
meth,
path);
fc.doFilter(req, resp);
return;
}
}
}
if(hreq.isUserInRole(type + '|'+path+'|'+meth)) {
access.printf(Level.INFO, "%s is allowed access to %s %s\n",
hreq.getUserPrincipal().getName(),
meth,
path);
fc.doFilter(req, resp);
} else {
access.printf(Level.AUDIT, "%s is denied access to %s %s\n",
hreq.getUserPrincipal().getName(),
meth,
path);
}
}
@Override
public void destroy() {
}
}
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