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Diffstat (limited to 'core/src/main/java/com/att/cadi/taf/HttpEpiTaf.java')
| -rw-r--r-- | core/src/main/java/com/att/cadi/taf/HttpEpiTaf.java | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/core/src/main/java/com/att/cadi/taf/HttpEpiTaf.java b/core/src/main/java/com/att/cadi/taf/HttpEpiTaf.java new file mode 100644 index 0000000..7f6d9af --- /dev/null +++ b/core/src/main/java/com/att/cadi/taf/HttpEpiTaf.java @@ -0,0 +1,186 @@ +/*******************************************************************************
+ * ============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;
+
+import java.net.URI;
+import java.security.Principal;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.att.cadi.Access;
+import com.att.cadi.CachedPrincipal;
+import com.att.cadi.CachedPrincipal.Resp;
+import com.att.cadi.CadiException;
+import com.att.cadi.Locator;
+import com.att.cadi.Taf.LifeForm;
+import com.att.cadi.TrustChecker;
+
+/**
+ * HttpEpiTaf
+ *
+ * An extension of the basic "EpiTAF" concept, check known HTTP Related TAFs for valid credentials
+ *
+ *
+ */
+public class HttpEpiTaf implements HttpTaf {
+ private HttpTaf[] tafs;
+ private Access access;
+ private Locator<URI> locator;
+ private TrustChecker trustChecker;
+
+ /**
+ * HttpEpiTaf constructor
+ *
+ * Construct the HttpEpiTaf from variable Http specific TAF parameters
+
+ * @param tafs
+ * @throws CadiException
+ */
+ public HttpEpiTaf(Access access, Locator<URI> locator, TrustChecker tc, HttpTaf ... tafs) throws CadiException{
+ this.tafs = tafs;
+ this.access = access;
+ this.locator = locator;
+ this.trustChecker = tc;
+ // Establish what Header Property to look for UserChain/Trust Props
+// trustChainProp = access.getProperty(Config.CADI_TRUST_PROP, Config.CADI_TRUST_PROP_DEFAULT);
+
+ if(tafs.length==0) throw new CadiException("Need at least one HttpTaf implementation in constructor");
+ }
+
+ /**
+ * validate
+ *
+ * Respond with the first Http specific TAF to authenticate user based on variable info
+ * and "LifeForm" (is it a human behind a browser, or a server utilizing HTTP Protocol).
+ *
+ * If there is no HttpTAF that can authenticate, respond with the first TAF that suggests it can
+ * establish an Authentication conversation (TRY_AUTHENTICATING) (Examples include a redirect to CSP
+ * Servers for CSP Cookie, or BasicAuth 401 response, suggesting User/Password for given Realm
+ * submission
+ *
+ * If no TAF declares either, respond with NullTafResp (which denies all questions)
+ */
+ public TafResp validate(LifeForm reading, HttpServletRequest req, HttpServletResponse resp) {
+ // Given a LifeForm Neutral, for HTTP, we need to discover true Life-Form Readings
+ if(reading==LifeForm.LFN) {
+ reading = tricorderScan(req);
+ }
+ TafResp tresp=null, firstTry = null;
+ List<Redirectable> redirectables = null;
+
+ for(HttpTaf taf : tafs) {
+ tresp = taf.validate(reading, req, resp);
+ switch(tresp.isAuthenticated()) {
+ case TRY_ANOTHER_TAF:
+ break; // and loop
+ case TRY_AUTHENTICATING:
+ if(tresp instanceof Redirectable) {
+ if(redirectables==null) {
+ redirectables = new ArrayList<Redirectable>();
+ }
+ redirectables.add((Redirectable)tresp);
+ } else if(firstTry==null) {
+ firstTry = tresp;
+ }
+ break;
+ case IS_AUTHENTICATED:
+ tresp = trustChecker.mayTrust(tresp, req);
+ return tresp;
+ default:
+ return tresp;
+ }
+ }
+
+ // If No TAFs configured, at this point. It is safer at this point to be "not validated",
+ // rather than "let it go"
+ // Note: if exists, there will always be more than 0 entries, according to above code
+ if(redirectables==null) {
+ return firstTry!=null?firstTry:NullTafResp.singleton();
+ }
+
+ // If there is one Tryable entry then return it
+ if(redirectables.size()>1) {
+ return LoginPageTafResp.create(access,locator,resp,redirectables);
+ } else {
+ return redirectables.get(0);
+ }
+ }
+
+ public boolean revalidate(Principal prin) throws Exception {
+ return false;
+ }
+
+ /*
+ * Since this is internal, we use a little Star Trek humor to indicate looking in the HTTP Request to see if we can determine what kind
+ * of "LifeForm" reading we can determine, i.e. is there a Human (CarbonBasedLifeForm) behind a browser, or is it mechanical
+ * id (SiliconBasedLifeForm)? This makes a difference in some Authentication, i.e CSP, which doesn't work well for SBLFs
+ */
+ private LifeForm tricorderScan(HttpServletRequest req) {
+ // For simplicity's sake, we'll say Humans use FQDNs, not IPs.
+
+ String auth = req.getParameter("Authentication");
+ if(auth!=null) {
+ if("BasicAuth".equals(auth)) {
+ return LifeForm.SBLF;
+ }
+ }
+ // Current guess that only Browsers bother to set "Agent" codes that identify the kind of browser they are.
+ // If mechanical frameworks are found that populate this, then more advanced analysis may be required
+ // 1/22/2013
+ String agent = req.getHeader("User-Agent");
+ if(agent!=null && agent.startsWith("Mozilla")) // covers I.E./Firefox/Safari/probably any other "advanced" Browser see http://en.wikipedia.org/wiki/User_agent
+ return LifeForm.CBLF;
+ return LifeForm.SBLF; // notably skips "curl","wget", (which is desired behavior. We don't want to try CSP, etc on these)
+ }
+
+ public Resp revalidate(CachedPrincipal prin) {
+ Resp resp;
+ for(HttpTaf taf : tafs) {
+ resp = taf.revalidate(prin);
+ switch(resp) {
+ case NOT_MINE:
+ break;
+ default:
+ return resp;
+ }
+ }
+ return Resp.NOT_MINE;
+ }
+
+ /**
+ * List HttpTafs with their "toString" representations... primarily useful for Debugging in an IDE
+ * like Eclipse.
+ */
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ for(HttpTaf ht : tafs) {
+ sb.append(ht.toString());
+ sb.append(". ");
+ }
+ return sb.toString();
+ }
+}
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