diff options
Diffstat (limited to 'core/src/main/java/com/att/cadi/filter/CadiFilter.java')
| -rw-r--r-- | core/src/main/java/com/att/cadi/filter/CadiFilter.java | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/core/src/main/java/com/att/cadi/filter/CadiFilter.java b/core/src/main/java/com/att/cadi/filter/CadiFilter.java new file mode 100644 index 0000000..578cbba --- /dev/null +++ b/core/src/main/java/com/att/cadi/filter/CadiFilter.java @@ -0,0 +1,306 @@ +/*******************************************************************************
+ * ============LICENSE_START====================================================
+ * * org.onap.aai
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * Copyright © 2017 Amdocs
+ * * ===========================================================================
+ * * 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====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+package com.att.cadi.filter;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.List;
+
+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 com.att.cadi.Access;
+import com.att.cadi.Access.Level;
+import com.att.cadi.CadiException;
+import com.att.cadi.CadiWrap;
+import com.att.cadi.Lur;
+import com.att.cadi.PropAccess;
+import com.att.cadi.ServletContextAccess;
+import com.att.cadi.TrustChecker;
+import com.att.cadi.config.Config;
+import com.att.cadi.config.Get;
+import com.att.cadi.taf.TafResp;
+import com.att.cadi.taf.TafResp.RESP;
+
+/**
+ * CadiFilter
+ *
+ * This class implements Servlet Filter, and ties together CADI implementations
+ *
+ * This class can be used in a standard J2EE Servlet manner. Optimal usage is for POJO operations, where
+ * one can enforce this Filter being first and primary. Depending on the Container, it
+ * may be more effective, in some cases, to utilize features that allow earlier determination of
+ * AUTHN (Authorization). An example would be "Tomcat Valve". These implementations, however, should
+ * be modeled after the "init" and "doFilter" functions, and be kept up to date as this class changes.
+ *
+ *
+ *
+ */
+public class CadiFilter implements Filter {
+ private static CadiHTTPManip httpChecker;
+ private static String[] pathExceptions;
+ private static List<Pair> mapPairs;
+ private Access access;
+ private Object[] additionalTafLurs;
+ private static int count=0;
+
+ public Lur getLur() {
+ return httpChecker.getLur();
+ }
+
+ /**
+ * Construct a viable Filter
+ *
+ * Due to the vagaries of many containers, there is a tendency to create Objects and call "Init" on
+ * them at a later time. Therefore, this object creates with an object that denies all access
+ * until appropriate Init happens, just in case the container lets something slip by in the meantime.
+ *
+ */
+ public CadiFilter() {
+ additionalTafLurs = CadiHTTPManip.noAdditional;
+ }
+
+ /**
+ * This constructor to be used when directly constructing and placing in HTTP Engine
+ *
+ * @param access
+ * @param moreTafLurs
+ * @throws ServletException
+ */
+ public CadiFilter(Access access, Object ... moreTafLurs) throws ServletException {
+ additionalTafLurs = moreTafLurs;
+ init(new AccessGetter(this.access = access));
+ }
+
+
+ /**
+ * Use this to pass in a PreContructed CADI Filter, but with initializing... let Servlet do it
+ * @param init
+ * @param access
+ * @param moreTafLurs
+ * @throws ServletException
+ */
+ public CadiFilter(boolean init, PropAccess access, Object ... moreTafLurs) throws ServletException {
+ this.access = access;
+ if(init) {
+ init(new AccessGetter(access));
+ }
+ additionalTafLurs = moreTafLurs;
+ }
+
+ /**
+ * Init
+ *
+ * Standard Filter "init" call with FilterConfig to obtain properties. POJOs can construct a
+ * FilterConfig with the mechanism of their choice, and standard J2EE Servlet engines utilize this
+ * mechanism already.
+ */
+ //TODO Always validate changes against Tomcat AbsCadiValve and Jaspi CadiSAM Init functions
+ public void init(FilterConfig filterConfig) throws ServletException {
+ // need the Context for Logging, instantiating ClassLoader, etc
+ ServletContextAccess sca=new ServletContextAccess(filterConfig);
+ if(access==null) {
+ access = sca;
+ }
+
+ // Set Protected getter with base Access, for internal class instantiations
+ init(new FCGet(access, sca.context(), filterConfig));
+ }
+
+
+ private void init(Get getter) throws ServletException {
+ // Start with the assumption of "Don't trust anyone".
+ TrustChecker tc = TrustChecker.NOTRUST; // default position
+ try {
+ @SuppressWarnings("unchecked")
+ Class<TrustChecker> ctc = (Class<TrustChecker>) Class.forName("com.att.cadi.aaf.v2_0.AAFTrustChecker");
+ if(ctc!=null) {
+ Constructor<TrustChecker> contc = ctc.getConstructor(Access.class);
+ if(contc!=null) {
+ tc = contc.newInstance(access);
+ }
+ }
+ } catch (Exception e) {
+ access.log(Level.INIT, "AAFTrustChecker cannot be loaded",e.getMessage());
+ }
+
+
+ // Synchronize, because some instantiations call init several times on the same object
+ // In this case, the epiTaf will be changed to a non-NullTaf, and thus not instantiate twice.
+ synchronized(CadiHTTPManip.noAdditional /*will always remain same Object*/) {
+ ++count;
+ if(httpChecker == null) {
+ if(access==null) {
+ access = new PropAccess();
+ }
+ try {
+ httpChecker = new CadiHTTPManip(access,null /*reuseable Con*/,tc, additionalTafLurs);
+ } catch (CadiException e1) {
+ throw new ServletException(e1);
+ }
+ } else if(access==null) {
+ access= httpChecker.getAccess();
+ }
+
+ /*
+ * Setup Authn Path Exceptions
+ */
+ if(pathExceptions==null) {
+ String str = getter.get(Config.CADI_NOAUTHN, null, true);
+ if(str!=null) {
+ pathExceptions = str.split("\\s*:\\s*");
+ }
+ }
+
+ /*
+ * SETUP Permission Converters... those that can take Strings from a Vendor Product, and convert to appropriate AAF Permissions
+ */
+ if(mapPairs==null) {
+ String str = getter.get(Config.AAF_PERM_MAP, null, true);
+ if(str!=null) {
+ String mstr = getter.get(Config.AAF_PERM_MAP, null, true);
+ if(mstr!=null) {
+ String map[] = mstr.split("\\s*:\\s*");
+ if(map.length>0) {
+ MapPermConverter mpc=null;
+ int idx;
+ mapPairs = new ArrayList<Pair>();
+ for(String entry : map) {
+ if((idx=entry.indexOf('='))<0) { // it's a Path, so create a new converter
+ access.log(Level.INIT,"Loading Perm Conversions for:",entry);
+ mapPairs.add(new Pair(entry,mpc=new MapPermConverter()));
+ } else {
+ if(mpc!=null) {
+ mpc.map().put(entry.substring(0,idx),entry.substring(idx+1));
+ } else {
+ access.log(Level.ERROR,"cadi_perm_map is malformed; ",entry, "is skipped");
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ // Remove Getter
+ getter = Get.NULL;
+ }
+
+ /**
+ * Containers call "destroy" when time to cleanup
+ */
+ public void destroy() {
+ // Synchronize, in case multiCadiFilters are used.
+ synchronized(CadiHTTPManip.noAdditional) {
+ if(--count<=0 && httpChecker!=null) {
+ httpChecker.destroy();
+ httpChecker=null;
+ access=null;
+ pathExceptions=null;
+ }
+ }
+ }
+
+ /**
+ * doFilter
+ *
+ * This is the standard J2EE invocation. Analyze the request, modify response as necessary, and
+ * only call the next item in the filterChain if request is suitably Authenticated.
+ */
+ //TODO Always validate changes against Tomcat AbsCadiValve and Jaspi CadiSAM functions
+ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
+ try {
+ HttpServletRequest hreq = (HttpServletRequest)request;
+ if(noAuthn(hreq)) {
+ chain.doFilter(request, response);
+ } else {
+ HttpServletResponse hresp = (HttpServletResponse)response;
+ TafResp tresp = httpChecker.validate(hreq, hresp);
+ if(tresp.isAuthenticated()==RESP.IS_AUTHENTICATED) {
+ CadiWrap cw = new CadiWrap(hreq, tresp, httpChecker.getLur(),getConverter(hreq));
+ if(httpChecker.notCadi(cw, hresp)) {
+ chain.doFilter(cw,response);
+ }
+ }
+ }
+ } catch (ClassCastException e) {
+ throw new ServletException("CadiFilter expects Servlet to be an HTTP Servlet",e);
+ }
+ }
+
+
+ /**
+ * If PathExceptions exist, report if these should not have Authn applied.
+ * @param hreq
+ * @return
+ */
+ private boolean noAuthn(HttpServletRequest hreq) {
+ if(pathExceptions!=null) {
+ String pi = hreq.getPathInfo();
+ if(pi==null) return false; // JBoss sometimes leaves null
+ for(String pe : pathExceptions) {
+ if(pi.startsWith(pe))return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Get Converter by Path
+ */
+ private PermConverter getConverter(HttpServletRequest hreq) {
+ if(mapPairs!=null) {
+ String pi = hreq.getPathInfo();
+ if(pi!=null) {
+ for(Pair p: mapPairs) {
+ if(pi.startsWith(p.name))return p.pc;
+ }
+ }
+ }
+ return NullPermConverter.singleton();
+ }
+
+ /**
+ * store PermConverters by Path prefix
+ *
+ */
+ private class Pair {
+ public Pair(String key, PermConverter pc) {
+ name = key;
+ this.pc = pc;
+ }
+ public String name;
+ public PermConverter pc;
+ }
+
+}
+
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