Adding AAF basic auth filter

Adding a AAF Cadi filter. AAF is configured to communicate with Beijing AAF instance in the Windriver lab. To activate AAF filter set the profile aaf-auth

Change-Id: I4f226f56eeb4686abd7b2d17a9db8be6a5e169c5
Issue-ID: AAI-32
Signed-off-by: Pavel Paroulek <pavel.paroulek@orange.com>

2 files changed, 78 insertions, 0 deletions

diff --git a/aai-traversal/src/main/java/org/onap/aai/Profiles.java b/aai-traversal/src/main/java/org/onap/aai/Profiles.java
index f0419d8..ea65b9a 100644
--- a/aai-traversal/src/main/java/org/onap/aai/Profiles.java
+++ b/aai-traversal/src/main/java/org/onap/aai/Profiles.java
@@ -25,6 +25,7 @@ public final class Profiles {
     public static final String DME2         = "dme2";
 
     public static final String ONE_WAY_SSL  = "one-way-ssl";
+    public static final String AAF_AUTHENTICATION  = "aaf-auth";
     public static final String TWO_WAY_SSL  = "two-way-ssl";
 
     private Profiles(){}
diff --git a/aai-traversal/src/main/java/org/onap/aai/config/AafFilter.java b/aai-traversal/src/main/java/org/onap/aai/config/AafFilter.java
new file mode 100644
index 0000000..d0c070f
--- /dev/null
+++ b/aai-traversal/src/main/java/org/onap/aai/config/AafFilter.java
@@ -0,0 +1,77 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 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.aai.config;
+
+import org.onap.aaf.cadi.PropAccess;
+import org.onap.aaf.cadi.filter.CadiFilter;
+import org.onap.aai.Profiles;
+import org.onap.aai.TraversalApp;
+import org.onap.aai.exceptions.AAIException;
+import org.onap.aai.logging.ErrorLogHelper;
+import org.springframework.context.annotation.Profile;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.ws.rs.core.MediaType;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Properties;
+
+/**
+ * AAF authentication filter
+ */
+
+@Order(1)
+@Component
+@Profile(Profiles.AAF_AUTHENTICATION)
+public class AafFilter extends OncePerRequestFilter {
+
+    private static final String ACCEPT_HEADER = "accept";
+    private final CadiFilter cadiFilter;
+
+    public AafFilter() throws IOException, ServletException {
+        Properties cadiProperties = new Properties();
+        cadiProperties.load(TraversalApp.class.getClassLoader().getResourceAsStream("cadi.properties"));
+        cadiFilter = new CadiFilter(new PropAccess(cadiProperties));
+    }
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws IOException, ServletException {
+        cadiFilter.doFilter(request, response, filterChain);
+        if(response.getStatus() >=400 && response.getStatus() < 500){
+                errorResponse(request, response);
+        }
+    }
+
+    private void errorResponse(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        String accept = request.getHeader(ACCEPT_HEADER) == null ? MediaType.APPLICATION_XML : request.getHeader(ACCEPT_HEADER);
+        AAIException aaie = new AAIException("AAI_3300");
+        response.setStatus(aaie.getErrorObject().getHTTPResponseCode().getStatusCode());
+        response.getWriter().write(ErrorLogHelper.getRESTAPIErrorResponse(Collections.singletonList(MediaType.valueOf(accept)), aaie, new ArrayList<>()));
+        response.getWriter().flush();
+        response.getWriter().close();
+    }
+}