update missing aaf documentation

Issue-ID: AAF-359
Change-Id: Iec79822da2d08c19847acc124cbe060f0b296fc8
Signed-off-by: Sai Gandham <sg481n@att.com>

1 files changed, 350 insertions, 2 deletions

diff --git a/docs/sections/configuration/service.rst b/docs/sections/configuration/service.rst
index 7cbbb748..ae5d0305 100644
--- a/docs/sections/configuration/service.rst
+++ b/docs/sections/configuration/service.rst
@@ -1,5 +1,353 @@
 .. This work is licensed under a Creative Commons Attribution 4.0 International License.
 .. http://creativecommons.org/licenses/by/4.0
 
-Service Configuration
-=====================
+Service Configuration  - Connecting to AAF
+==========================================
+
+
+
+Methods to Connect
+==================
+
+•	If you are a Servlet in a Container, use CADI Framework with AAF Plugin.  It's very easy, and includes BasicAuth for Services.  
+•	Java Technologies
+•	Technologies using Servlet Filters
+•	DME2 (and other Servlet Containers) can use Servlet Filters
+•	Any WebApp can plug in CADI as a Servlet Filter
+•	Jetty can attach a Servlet Filter with Code, or as WebApp
+•	Tomcat 7 has a "Valve" plugin, which is similar and supported
+•	Use the AAFLur Code directly (shown)
+•	All Java Technologies utilize Configuration to set what Security elements are required
+•	example: Global Login can be turned on/off, AAF Client needs information to connect to AAF Service
+•	There are several specialty cases, which AAF can work with, including embedding all properties in a Web.xml, but the essentials needed are:
+•	CADI Jars
+•	cadi.properties file (configured the same for all technologies)
+•	Encrypt passwords with included CADI technology, so that there are no Clear Text Passwords in Config Files (ASPR)
+•	See CADI Deployment on how to perform this with several different technologies.
+•	AAF Restfully (see RESTFul APIS)
+
+IMPORTANT: If Direct RESTFul API is used, then it is the Client's responsibility to Cache and avoid making an AAF Service Calls too often
+Example: A Tool like Cassandra will ask for Authentication hundreds of times a second for the same identity during a transaction.  Calling the AAF Service for each would be slow for the client, and wasteful of Network and AAF Service Capacities.  
+Rogue Clients can and will be denied access to AAF.
+
+
+J2EE (Servlet Filter) Method
+============================
+
+1.	Per J2EE design, the Filter will deny any unauthenticated HTTP/S call; the Servlet will not even be invoked.
+a.	Therefore, the Servlet can depend on any transaction making it to their code set is Authenticated.
+b.	Identity can be viewed based on the HttpServletRequest Object (request.getUserPrincipal() )
+2.	Per J2EE design, AAF Filter overloads the HttpServletRequest for a String related to "Role".  (request.isUserInRole("...") )
+a.	For AAF, do not put in "Role", but the three parts of requested "Permission", separated by "|", i.e.  "org.onap.aaf.myapp.myperm|myInstance|myAction".
+3.	NOT REQUIRED: An added benefit, but not required, is a JASPI like interface, where you can add an Annotation to your Servlet. 
+a.	When used, no transaction will come into your code if the listed Permissions are not Granted to the Incoming Transaction.  
+b.	This might be helpful for covering separate Management Servlet implementations.
+
+
+
+Servlet Code Snippet
+=========================
+
+public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
+    HttpServletRequest request;
+    try {
+        request = (HttpServletRequest)req;
+    } catch (ClassCastException e) {
+        throw new ServletException("Only serving HTTP today",e);
+    }
+     
+    // Note: CADI is OVERLOADING the concept of "isUserInRole".. You need to think "doesUserHavePermssion()"
+    // Assume that you have CREATED and GRANTED An AAF Permission in YOUR Namespace
+    // Example Permission:   "org.onap.aaf.myapp.myPerm * write"
+ 
+    // Think in your head, "Does user have write permission on any instance of org.onap.aaf.myapp.myPerm
+    if(request.isUserInRole("org.onap.aaf.myapp.myPerm|*|write")) { 
+        // *** Do something here that someone with "myPerm write" permissions is allowed to do
+    } else {
+        // *** Do something reasonable if user is denied, like an Error Message
+    }
+ 
+}
+
+Here is a working TestServlet, where you can play with different Permissions that you own on the URL, i.e.:
+https://<your machine:port>/caditest/testme?PERM=org.onap.aaf.myapp.myPerm|*|write
+
+Sample Servlet (Working example)
+================================
+package org.onap.aaf.cadi.debug;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Properties;
+import javax.servlet.Servlet;
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.server.ServerConnector;
+import org.eclipse.jetty.server.handler.ContextHandler;
+import org.eclipse.jetty.servlet.FilterHolder;
+import org.eclipse.jetty.servlet.FilterMapping;
+import org.eclipse.jetty.servlet.ServletContextHandler;
+import org.eclipse.jetty.servlet.ServletHandler;
+import org.onap.aaf.cadi.filter.CadiFilter;
+import org.onap.aaf.cadi.filter.RolesAllowed;
+import org.onap.aaf.cadi.jetty.MiniJASPIWrap;
+ 
+public class CSPServletTest {
+    public static void main(String[] args) {
+        // Go ahead and print Test reports in cadi-core first
+        Test.main(args);
+        String hostname=null;
+        try {
+            hostname = InetAddress.getLocalHost().getHostName();
+        } catch (UnknownHostException e) {
+            e.printStackTrace();
+            System.exit(1);
+        }
+        Properties props = new Properties();
+        Map<String,String> map = new HashMap<String,String>();
+        try {
+            FileInputStream fis = new FileInputStream("run/cadi.properties");
+            try {
+                props.load(fis);
+                String key,value;
+                for( Entry<Object, Object> es  : props.entrySet()) {
+                    key = es.getKey().toString();
+                    value = es.getValue().toString();
+                    map.put(key,value);
+                    if(key.startsWith("AFT_") || key.startsWith("DME2")) {
+                        System.setProperty(key,value);
+                    }
+                }
+            } finally {
+                fis.close();
+            }
+        } catch(IOException e) {
+            System.err.println("Cannot load run/cadi.properties");
+            System.exit(1);
+        }
+        String portStr = System.getProperty("port");
+        int port = portStr==null?8080:Integer.parseInt(portStr);
+        try {
+            // Add ServletHolder(s) and Filter(s) to a ServletHandler
+            ServletHandler shand = new ServletHandler();
+             
+            FilterHolder cfh = new FilterHolder(CadiFilter.class);
+            cfh.setInitParameters(map);
+             
+            shand.addFilterWithMapping(cfh, "/*", FilterMapping.ALL);
+            shand.addServletWithMapping(new MiniJASPIWrap(MyServlet.class),"/*");
+            // call initialize after start
+             
+            ContextHandler ch = new ServletContextHandler();
+            ch.setContextPath("/caditest");
+            ch.setHandler(shand);
+            for( Entry<Object,Object> es : props.entrySet()) {
+                ch.getInitParams().put(es.getKey().toString(), es.getValue().toString());
+            }
+            //ch.setErrorHandler(new MyErrorHandler());
+             
+            // Create Server and Add Context Handler
+            final Server server = new Server();
+            ServerConnector http = new ServerConnector(server);
+            http.setPort(port);
+            server.addConnector(http);
+            server.setHandler(ch);
+         
+            // Start
+            server.start();
+            shand.initialize();
+             
+            System.out.println("To test, put http://"+ hostname + ':' + port + "/caditest/testme in a browser or 'curl'");
+            // if we were really a server, we'd block the main thread with this join...
+            // server.join();
+            // But... since we're a test service, we'll block on StdIn
+            System.out.println("Press <Return> to end service...");
+            System.in.read();
+            server.stop();
+            System.out.println("All done, have a good day!");
+        } catch (Exception e) {
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+    @RolesAllowed({"org.onap.aaf.myapp.myPerm|myInstance|myAction"})
+    public static class MyServlet implements Servlet {
+        private ServletConfig servletConfig;
+     
+        public void init(ServletConfig config) throws ServletException {
+            servletConfig = config;
+        }
+     
+        public ServletConfig getServletConfig() {
+            return servletConfig;
+        }
+     
+        public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
+            HttpServletRequest request;
+            try {
+                request = (HttpServletRequest)req;
+            } catch (ClassCastException e) {
+                throw new ServletException("Only serving HTTP today",e);
+            }
+             
+            res.getOutputStream().print("<html><header><title>CSP Servlet Test</title></header><body><h1>You're good to go!</h1><pre>" +
+                    request.getUserPrincipal());
+             
+            String perm = request.getParameter("PERM");
+            if(perm!=null)
+                if(request.isUserInRole(perm)) {
+                    if(perm.indexOf('|')<0) 
+                        res.getOutputStream().print("\nCongrats!, You are in Role " + perm);
+                      else
+                        res.getOutputStream().print("\nCongrats!, You have Permission " + perm);
+                } else {
+                    if(perm.indexOf('|')<0) 
+                        res.getOutputStream().print("\nSorry, you are NOT in Role " + perm);
+                      else
+                        res.getOutputStream().print("\nSorry, you do NOT have Permission " + perm);
+                }
+             
+            res.getOutputStream().print("</pre></body></html>");
+             
+        }
+     
+        public String getServletInfo() {
+            return "MyServlet";
+        }
+     
+        public void destroy() {
+        }
+    }
+}
+ 
+Java Direct (AAFLur) Method
+===========================
+The AAFLur is the exact component used within all the Plugins mentioned above.  It is written so that it can be called standalone as well, see the Example as follows
+package org.onap.aaf.example;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+
+import org.onap.aaf.cadi.Access;
+import org.onap.aaf.cadi.Permission;
+import org.onap.aaf.cadi.aaf.v2_0.AAFAuthn;
+import org.onap.aaf.cadi.aaf.v2_0.AAFCon;
+import org.onap.aaf.cadi.aaf.v2_0.AAFLurPerm;
+import org.onap.aaf.cadi.config.Config;
+import org.onap.aaf.cadi.lur.aaf.AAFPermission;
+import org.onap.aaf.cadi.lur.aaf.test.TestAccess;
+
+public class ExamplePerm2_0 {
+	public static void main(String args[]) {
+		// Normally, these should be set in environment.  Setting here for clarity
+		Properties props = System.getProperties();
+		props.setProperty("AFT_LATITUDE", "32.780140");
+		props.setProperty("AFT_LONGITUDE", "-96.800451");
+		props.setProperty("AFT_ENVIRONMENT", "AFTUAT");
+		props.setProperty(Config.AAF_URL,
+		"https://DME2RESOLVE/service=org.onap.aaf.authz.AuthorizationService/version=2.0/envContext=TEST/routeOffer=BAU_SE"
+				);
+		props.setProperty(Config.AAF_USER_EXPIRES,Integer.toString(5*60000));	// 5 minutes for found items to live in cache
+		props.setProperty(Config.AAF_HIGH_COUNT,Integer.toString(400));		// Maximum number of items in Cache);
+		props.setProperty(Config.CADI_KEYFILE,"keyfile"); //Note: Be sure to generate with java -jar <cadi_path>/lib/cadi-core*.jar keygen keyfile
+//		props.setProperty("DME2_EP_REGISTRY_CLASS","DME2FS");
+//		props.setProperty("AFT_DME2_EP_REGISTRY_FS_DIR","../../authz/dme2reg");
+
+		
+		// Link or reuse to your Logging mechanism
+		Access myAccess = new TestAccess(); // 
+		
+		// 
+		try {
+			AAFCon<?> con = new AAFConDME2(myAccess);
+			
+			// AAFLur has pool of DME clients as needed, and Caches Client lookups
+			AAFLurPerm aafLur = con.newLur();
+			// Note: If you need both Authn and Authz construct the following:
+			AAFAuthn<?> aafAuthn = con.newAuthn(aafLur);
+
+			// Do not set Mech ID until after you construct AAFAuthn,
+			// because we initiate  "401" info to determine the Realm of 
+			// of the service we're after.
+			con.basicAuth("xxxx@aaf.abc.com", "XXXXXX");
+
+			try {
+				
+				// Normally, you obtain Principal from Authentication System.
+				// For J2EE, you can ask the HttpServletRequest for getUserPrincipal()
+				// If you use CADI as Authenticator, it will get you these Principals from
+				// CSP or BasicAuth mechanisms.
+				String id = "xxxx@aaf.abc.com"; //"cluster_admin@gridcore.abc.com";
+
+				// If Validate succeeds, you will get a Null, otherwise, you will a String for the reason.
+				String ok = aafAuthn.validate(id, "XXXXXX");
+				if(ok!=null)System.out.println(ok);
+				
+				ok = aafAuthn.validate(id, "wrongPass");
+				if(ok!=null)System.out.println(ok);
+
+
+				// AAF Style permissions are in the form
+				// Type, Instance, Action 
+				AAFPermission perm = new AAFPermission("org.onap.aaf.grid.core.coh",":dev_cluster", "WRITE");
+				
+				// Now you can ask the LUR (Local Representative of the User Repository about Authorization
+				// With CADI, in J2EE, you can call isUserInRole("org.onap.aaf.mygroup|mytype|write") on the Request Object 
+				// instead of creating your own LUR
+				System.out.println("Does " + id + " have " + perm);
+				if(aafLur.fish(id, perm)) {
+					System.out.println("Yes, you have permission");
+				} else {
+					System.out.println("No, you don't have permission");
+				}
+
+				System.out.println("Does Bogus have " + perm);
+				if(aafLur.fish("Bogus", perm)) {
+					System.out.println("Yes, you have permission");
+				} else {
+					System.out.println("No, you don't have permission");
+				}
+
+				// Or you can all for all the Permissions available
+				List<Permission> perms = new ArrayList<Permission>();
+				
+				aafLur.fishAll(id,perms);
+				for(Permission prm : perms) {
+					System.out.println(prm.getKey());
+				}
+				
+				// It might be helpful in some cases to clear the User's identity from the Cache
+				aafLur.remove(id);
+			} finally {
+				aafLur.destroy();
+			}
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
+	}
+}
+
+There are two current AAF Lurs which you can utilize:
+•	Org.onap.aaf.cadi.aaf.v2_0.AAFLurPerm is the default, and will fish based on the Three-fold "Permission" standard in AAF
+To run this code, you will need from a SWM deployment (org.onap.aaf.cadi:cadi, then soft link to jars needed):
+•	cadi-core-<version>.jar
+•	cadi-aaf-<version>-full.jar
+   or by Maven
+<dependency>
+<groupId>org.onap.aaf.cadi</groupId>
+<artifactId>aaf-cadi-aaf</artifactId>
+<version>THE_LATEST_VERSION</version>
+<classifier>full</classifier> 
+</dependency>
+
+