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/**
* ============LICENSE_START====================================================
* org.onap.aaf
* ===========================================================================
* Copyright (c) 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.aaf.auth.rserv;
import java.io.IOException;
import java.security.Principal;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.onap.aaf.auth.env.AuthzTrans;
import org.onap.aaf.cadi.Access;
import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.cadi.CadiWrap;
import org.onap.aaf.cadi.Connector;
import org.onap.aaf.cadi.LocatorException;
import org.onap.aaf.cadi.Lur;
import org.onap.aaf.cadi.TrustChecker;
import org.onap.aaf.cadi.config.Config;
import org.onap.aaf.cadi.filter.CadiHTTPManip;
import org.onap.aaf.cadi.taf.TafResp;
import org.onap.aaf.cadi.taf.TafResp.RESP;
import org.onap.aaf.misc.env.Env;
import org.onap.aaf.misc.env.TimeTaken;
import org.onap.aaf.misc.env.TransStore;
import org.onap.aaf.misc.env.util.Split;
/**
* Create a new Transaction Object for each and every incoming Transaction
*
* Attach to Request. User "FilterHolder" mechanism to retain single instance.
*
* TransFilter includes CADIFilter as part of the package, so that it can
* set User Data, etc, as necessary.
*
* @author Jonathan
*
*/
public abstract class TransFilter<TRANS extends TransStore> implements Filter {
public static final String TRANS_TAG = "__TRANS__";
private CadiHTTPManip cadi;
private final String[] no_authn;
public TransFilter(Access access, Connector con, TrustChecker tc, Object ... additionalTafLurs) throws CadiException, LocatorException {
cadi = new CadiHTTPManip(access, con, tc, additionalTafLurs);
String no = access.getProperty(Config.CADI_NOAUTHN, null);
if (no!=null) {
no_authn = Split.split(':', no);
} else {
no_authn=null;
}
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
protected Lur getLur() {
return cadi.getLur();
}
protected abstract TRANS newTrans(HttpServletRequest request);
protected abstract TimeTaken start(TRANS trans, ServletRequest request);
protected abstract void authenticated(TRANS trans, Principal p);
protected abstract void tallyHo(TRANS trans, String target);
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest)request;
HttpServletResponse res = (HttpServletResponse)response;
TRANS trans = newTrans(req);
TimeTaken overall = start(trans,request);
String target = "n/a";
try {
request.setAttribute(TRANS_TAG, trans);
if (no_authn!=null) {
for (String prefix : no_authn) {
if (req.getPathInfo().startsWith(prefix)) {
chain.doFilter(request, response);
return;
}
}
}
TimeTaken security = trans.start("CADI Security", Env.SUB);
TafResp resp;
RESP r;
CadiWrap cw = null;
try {
resp = cadi.validate(req,res,trans);
Object tag = req.getAttribute("CRED_TAG");
if(tag!=null) {
((AuthzTrans)trans).setTag(tag.toString());
}
switch(r=resp.isAuthenticated()) {
case IS_AUTHENTICATED:
cw = new CadiWrap(req,resp,cadi.getLur());
authenticated(trans, cw.getUserPrincipal());
break;
default:
break;
}
} finally {
security.done();
}
if (r==RESP.IS_AUTHENTICATED) {
trans.checkpoint(resp.desc());
if (cadi.notCadi(cw, res)) {
chain.doFilter(cw, response);
}
} else {
//TODO this is a good place to check if too many checks recently
// Would need Cached Counter objects that are cleaned up on
// use
trans.checkpoint(resp.desc(),Env.ALWAYS);
if (resp.isFailedAttempt()) {
target = resp.getTarget();
}
}
} catch (Exception e) {
trans.error().log(e);
trans.checkpoint("Error: " + e.getClass().getSimpleName() + ": " + e.getMessage());
throw new ServletException(e);
} finally {
overall.done();
tallyHo(trans,target);
}
}
@Override
public void destroy() {
};
}
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