Document AAF Installation

Issue-ID: AAF-292
Change-Id: Ic02bf086454dcd0de306f9e6d9c334fd0f6b21e7
Signed-off-by: Instrumental <jonathan.gathman@att.com>

1 files changed, 190 insertions, 0 deletions

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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+
+AAF From Source Code
+====================
+
+Example Source Code
+-------------------
+Note the FULL class is available in the authz repo, cadi_aaf/org/onap/aaf/client/sample/Sample.java
+
+.. code-block:: java
+
+
+  /**
+   * ============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.client.sample;
+ 
+  import java.io.IOException;
+  import java.security.Principal;
+  import java.util.ArrayList;
+  import java.util.List;
+ 
+  import org.onap.aaf.cadi.Access;
+  import org.onap.aaf.cadi.CadiException;
+  import org.onap.aaf.cadi.LocatorException;
+  import org.onap.aaf.cadi.Permission;
+  import org.onap.aaf.cadi.PropAccess;
+  import org.onap.aaf.cadi.aaf.AAFPermission;
+  import org.onap.aaf.cadi.aaf.v2_0.AAFAuthn;
+  import org.onap.aaf.cadi.aaf.v2_0.AAFConHttp;
+  import org.onap.aaf.cadi.aaf.v2_0.AAFLurPerm;
+  import org.onap.aaf.cadi.principal.UnAuthPrincipal;
+  import org.onap.aaf.cadi.util.Split;
+  import org.onap.aaf.misc.env.APIException;
+ 
+  public class Sample {
+    private static Sample singleton;
+    final private AAFConHttp aafcon;
+    final private AAFLurPerm aafLur;
+    final private AAFAuthn<?> aafAuthn;
+     
+    /**
+     * This method is to emphasize the importance of not creating the AAFObjects over and over again.
+     * @return
+     */
+    public static Sample singleton() {
+        return singleton;
+    }
+ 
+    public Sample(Access myAccess) throws APIException, CadiException, LocatorException {
+        aafcon = new AAFConHttp(myAccess);
+        aafLur = aafcon.newLur();
+        aafAuthn = aafcon.newAuthn(aafLur);
+    }
+     
+    /**
+     * Checking credentials outside of HTTP/S presents fewer options initially. There is not, for instance,
+     * the option of using 2-way TLS HTTP/S.
+     * 
+     *  However, Password Checks are still useful, and, if the Client Certificate could be obtained in other ways, the
+     *  Interface can be expanded in the future to include Certificates.
+     * @throws CadiException
+     * @throws IOException
+     */
+    public Principal checkUserPass(String fqi, String pass) throws IOException, CadiException {
+        String ok = aafAuthn.validate(fqi, pass);
+        if(ok==null) {
+            System.out.println("Success!");
+            /*
+             UnAuthPrincipal means that it is not coming from the official Authorization chain.
+             This is useful for Security Plugins which don't use Principal as the tie between
+             Authentication and Authorization
+             
+             You can also use this if you want to check Authorization without actually Authenticating, as may
+             be the case with certain Onboarding Tooling.
+            */
+            return new UnAuthPrincipal(fqi);
+        } else {
+            System.out.printf("Failure: %s\n",ok);
+            return null;
+        }
+         
+ 
+    }
+ 
+    /**
+     * An example of looking for One Permission within all the permissions user has.  CADI does cache these,
+     * so the call is not expensive.
+     *
+     * Note: If you are using "J2EE" (Servlets), CADI ties this function to the method:
+     *    HttpServletRequest.isUserInRole(String user)
+     *   
+     *  The J2EE user can expect that his servlet will NOT be called without a Validated Principal, and that
+     *  "isUserInRole()" will validate if the user has the Permission designated.
+     * 
+     */
+    public boolean oneAuthorization(Principal fqi, Permission p) {
+        return aafLur.fish(fqi, p);
+    }
+     
+    public List<Permission> allAuthorization(Principal fqi) {
+        List<Permission> pond = new ArrayList<Permission>();
+        aafLur.fishAll(fqi, pond);
+        return pond;
+    }
+     
+     
+    public static void main(String[] args) {
+        // Note: you can pick up Properties from Command line as well as VM Properties
+        // Code "user_fqi=... user_pass=..." (where user_pass can be encrypted) in the command line for this sample.
+        // Also code "perm=<perm type>|<instance>|<action>" to test a specific Permission
+        PropAccess myAccess = new PropAccess(args);
+        try {
+            /*
+             * NOTE:  Do NOT CREATE new aafcon, aafLur and aafAuthn each transaction.  They are built to be
+             * reused!
+             *
+             * This is why this code demonstrates "Sample" as a singleton.
+             */
+            singleton = new Sample(myAccess);
+            String user = myAccess.getProperty("user_fqi");
+            String pass= myAccess.getProperty("user_pass");
+             
+            if(user==null || pass==null) {
+                System.err.println("This Sample class requires properties user_fqi and user_pass");
+            } else {
+                pass =  myAccess.decrypt(pass, false); // Note, with "false", decryption will only happen if starts with "enc:"
+                // See the CODE for Java Methods used
+                Principal fqi = Sample.singleton().checkUserPass(user,pass);
+                 
+                if(fqi==null) {
+                    System.out.println("OK, normally, you would cease processing for an "
+                            + "unauthenticated user, but for the purpose of Sample, we'll keep going.\n");
+                    fqi=new UnAuthPrincipal(user);
+                }
+                 
+                // AGAIN, NOTE: If your client fails Authentication, the right behavior 99.9%
+                // of the time is to drop the transaction.  We continue for sample only.
+                 
+                // note, default String for perm
+                String permS = myAccess.getProperty("perm","org.osaaf.aaf.access|*|read");
+                String[] permA = Split.splitTrim('|', permS);
+                if(permA.length>2) {
+                    final Permission perm = new AAFPermission(permA[0],permA[1],permA[2]);
+                    // See the CODE for Java Methods used
+                    if(singleton().oneAuthorization(fqi, perm)) {
+                        System.out.printf("Success: %s has %s\n",fqi.getName(),permS);
+                    } else {
+                        System.out.printf("%s does NOT have %s\n",fqi.getName(),permS);
+                    }
+                }
+                 
+                 
+                // Another form, you can get ALL permissions in a list
+                // See the CODE for Java Methods used
+                List<Permission> permL = singleton().allAuthorization(fqi);
+                if(permL.size()==0) {
+                    System.out.printf("User %s has no Permissions THAT THE CALLER CAN SEE",fqi.getName());
+                } else {
+                    System.out.print("Success:\n");
+                    for(Permission p : permL) {
+                        System.out.printf("\t%s has %s\n",fqi.getName(),p.getKey());
+                    }
+                }
+            }
+        } catch (APIException | CadiException | LocatorException | IOException e) {
+            e.printStackTrace();
+        }
+    }
+  }
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