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+/*******************************************************************************
+ * ============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.taf.basic;
+
+import java.io.IOException;
+import java.security.Principal;
+
+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.BasicCred;
+import com.att.cadi.CachedPrincipal;
+import com.att.cadi.CachedPrincipal.Resp;
+import com.att.cadi.CredVal;
+import com.att.cadi.CredVal.Type;
+import com.att.cadi.Taf;
+import com.att.cadi.principal.BasicPrincipal;
+import com.att.cadi.principal.CachedBasicPrincipal;
+import com.att.cadi.taf.HttpTaf;
+import com.att.cadi.taf.TafResp;
+import com.att.cadi.taf.TafResp.RESP;
+import com.att.cadi.taf.dos.DenialOfServiceTaf;
+
+/**
+ * BasicHttpTaf
+ *
+ * This TAF implements the "Basic Auth" protocol.
+ *
+ * WARNING! It is true for any implementation of "Basic Auth" that the password is passed unencrypted.
+ * This is because the expectation, when designed years ago, was that it would only be used in
+ * conjunction with SSL (https). It is common, however, for users to ignore this on the assumption that
+ * their internal network is secure, or just ignorance. Therefore, a WARNING will be printed
+ * when the HTTP Channel is not encrypted (unless explicitly turned off).
+ *
+ *
+ */
+public class BasicHttpTaf implements HttpTaf {
+ private Access access;
+ private String realm;
+ private CredVal rbac;
+ private boolean warn;
+ private long timeToLive;
+
+ public BasicHttpTaf(Access access, CredVal rbac, String realm, long timeToLive, boolean turnOnWarning) {
+ this.access = access;
+ this.realm = realm;
+ this.rbac = rbac;
+ this.warn = turnOnWarning;
+ this.timeToLive = timeToLive;
+ }
+
+ /**
+ * Note: BasicHttp works for either Carbon Based (Humans) or Silicon Based (machine) Lifeforms.
+ * @see Taf
+ */
+ public TafResp validate(Taf.LifeForm reading, HttpServletRequest req, HttpServletResponse resp) {
+ // See if Request implements BasicCred (aka CadiWrap or other), and if User/Pass has already been set separately
+ if(req instanceof BasicCred) {
+ BasicCred bc = (BasicCred)req;
+ if(bc.getUser()!=null) { // CadiWrap, if set, makes sure User & Password are both valid, or both null
+ if(DenialOfServiceTaf.isDeniedID(bc.getUser())!=null) {
+ return DenialOfServiceTaf.respDenyID(access,bc.getUser());
+ }
+ CachedBasicPrincipal bp = new CachedBasicPrincipal(this,bc,realm,timeToLive);
+ // ONLY FOR Last Ditch DEBUGGING...
+ // access.log(Level.WARN,bp.getName() + ":" + new String(bp.getCred()));
+ if(rbac.validate(bp.getName(),Type.PASSWORD,bp.getCred())) {
+ return new BasicHttpTafResp(access,bp,bp.getName()+" authenticated by password",RESP.IS_AUTHENTICATED,resp,realm,false);
+ } else {
+ //TODO may need timed retries in a given time period
+ return new BasicHttpTafResp(access,null,buildMsg(bp,req,"User/Pass combo invalid for ",bc.getUser()),
+ RESP.TRY_AUTHENTICATING,resp,realm,true);
+ }
+ }
+ }
+ // Get User/Password from Authorization Header value
+ String authz = req.getHeader("Authorization");
+ if(authz != null && authz.startsWith("Basic ")) {
+ if(warn&&!req.isSecure()) {
+ access.log(Level.WARN,"WARNING! BasicAuth has been used over an insecure channel");
+ }
+ try {
+ CachedBasicPrincipal ba = new CachedBasicPrincipal(this,authz,realm,timeToLive);
+ if(DenialOfServiceTaf.isDeniedID(ba.getName())!=null) {
+ return DenialOfServiceTaf.respDenyID(access,ba.getName());
+ }
+
+ // ONLY FOR Last Ditch DEBUGGING...
+ // access.log(Level.WARN,ba.getName() + ":" + new String(ba.getCred()));
+ if(rbac.validate(ba.getName(), Type.PASSWORD, ba.getCred())) {
+ return new BasicHttpTafResp(access,ba, ba.getName()+" authenticated by BasicAuth password",RESP.IS_AUTHENTICATED,resp,realm,false);
+ } else {
+ //TODO may need timed retries in a given time period
+ return new BasicHttpTafResp(access,null,buildMsg(ba,req,"User/Pass combo invalid"),
+ RESP.TRY_AUTHENTICATING,resp,realm,true);
+ }
+ } catch (IOException e) {
+ String msg = buildMsg(null,req,"Failed HTTP Basic Authorization (", e.getMessage(), ')');
+ access.log(Level.INFO,msg);
+ return new BasicHttpTafResp(access,null,msg, RESP.TRY_AUTHENTICATING, resp, realm,true);
+ }
+ }
+ return new BasicHttpTafResp(access,null,"Requesting HTTP Basic Authorization",RESP.TRY_AUTHENTICATING,resp,realm,false);
+ }
+
+ protected String buildMsg(Principal pr, HttpServletRequest req, Object ... msg) {
+ StringBuilder sb = new StringBuilder();
+ for(Object s : msg) {
+ sb.append(s.toString());
+ }
+ if(pr!=null) {
+ sb.append(" for ");
+ sb.append(pr.getName());
+ }
+ sb.append(" from ");
+ sb.append(req.getRemoteAddr());
+ sb.append(':');
+ sb.append(req.getRemotePort());
+ return sb.toString();
+ }
+
+ @Override
+ public Resp revalidate(CachedPrincipal prin) {
+ if(prin instanceof BasicPrincipal) {
+ BasicPrincipal ba = (BasicPrincipal)prin;
+ if(DenialOfServiceTaf.isDeniedID(ba.getName())!=null) {
+ return Resp.UNVALIDATED;
+ }
+ return rbac.validate(ba.getName(), Type.PASSWORD, ba.getCred())?Resp.REVALIDATED:Resp.UNVALIDATED;
+ }
+ return Resp.NOT_MINE;
+ }
+
+ public String toString() {
+ return "Basic Auth enabled on realm: " + realm;
+ }
+}