Added Authentication Component

[eliot.git] / blueprints / common / eliot-ui / be / src / eliotk8sclient / src / main / java / com / eliot / eliotbe / eliotk8sclient / config / JwtRequestFilter.java

diff --git a/blueprints/common/eliot-ui/be/src/eliotk8sclient/src/main/java/com/eliot/eliotbe/eliotk8sclient/config/JwtRequestFilter.java b/blueprints/common/eliot-ui/be/src/eliotk8sclient/src/main/java/com/eliot/eliotbe/eliotk8sclient/config/JwtRequestFilter.java
new file mode 100644 (file)
index 0000000..6244072
--- /dev/null
+++ b/blueprints/common/eliot-ui/be/src/eliotk8sclient/src/main/java/com/eliot/eliotbe/eliotk8sclient/config/JwtRequestFilter.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2020 Huawei Technologies Co., Ltd.
+ *
+ * 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.
+ */
+package com.eliot.eliotbe.eliotk8sclient.config;
+
+import java.io.IOException;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import com.eliot.eliotbe.eliotk8sclient.service.JwtUserDetailsService;
+import com.eliot.eliotbe.eliotk8sclient.util.*;
+import io.jsonwebtoken.ExpiredJwtException;
+
+@Component
+public class JwtRequestFilter extends OncePerRequestFilter {
+
+    @Autowired
+    private JwtUserDetailsService jwtUserDetailsService;
+
+    @Autowired
+    private JwtTokenUtil jwtTokenUtil;
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
+            throws ServletException, IOException {
+
+        final String requestTokenHeader = request.getHeader("Authorization");
+
+        String username = null;
+        String jwtToken = null;
+        // JWT Token is in the form "Bearer token". Remove Bearer word and get
+        // only the Token
+        if (requestTokenHeader != null && requestTokenHeader.startsWith("Bearer ")) {
+            jwtToken = requestTokenHeader.substring(7);
+            try {
+                username = jwtTokenUtil.getUsernameFromToken(jwtToken);
+            } catch (IllegalArgumentException e) {
+                System.out.println("Unable to get JWT Token");
+            } catch (ExpiredJwtException e) {
+                System.out.println("JWT Token has expired");
+            }
+        } else {
+            logger.warn("JWT Token does not begin with Bearer String");
+        }
+
+        // Once we get the token validate it.
+        if (username != null && SecurityContextHolder.getContext().getAuthentication() == null) {
+
+            UserDetails userDetails = this.jwtUserDetailsService.loadUserByUsername(username);
+
+            // if token is valid configure Spring Security to manually set
+            // authentication
+            if (jwtTokenUtil.validateToken(jwtToken, userDetails)) {
+
+                UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
+                        userDetails, null, userDetails.getAuthorities());
+                usernamePasswordAuthenticationToken
+                        .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
+                // After setting the Authentication in the context, we specify
+                // that the current user is authenticated. So it passes the
+                // Spring Security Configurations successfully.
+                SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
+            }
+        }
+        chain.doFilter(request, response);
+    }
+
+}