add: Auth

src/main/java/com/letterpaw/soap/util/Auth.java

+package com.letterpaw.soap.util;
+
+import com.letterpaw.soap.enums.ServiceType;
+
+import javax.xml.ws.WebServiceContext;
+import javax.xml.ws.handler.MessageContext;
+import java.util.List;
+import java.util.Map;
+
+public class Auth {
+    public static final String RESTAPIKey = System.getenv().getOrDefault("REST_API_KEY", "DefaultRESTAPIKey");
+    public static final String PHPAPIKey = System.getenv().getOrDefault("PHP_API_KEY", "DefaultPHPAPIKey");
+
+    public static boolean IsAuthenticated(WebServiceContext ctx, ServiceType type) {
+        @SuppressWarnings("unchecked")
+        // Check if the service is authenticated or not, message context is used to get HTTP request headers, which contains the key,
+        // which is then compared with the actual key
+        Map<String, List<String>> headers = (Map<String, List<String>>)
+                ctx.getMessageContext().get(MessageContext.HTTP_REQUEST_HEADERS);
+        // Get header for authorization
+        List<String> auth = headers.get("authorization");
+        String key = "";
+        // Get the stored key
+        if (type == ServiceType.REST) {
+            key = RESTAPIKey;
+        } else if (type == ServiceType.PHP) {
+            key = PHPAPIKey;
+        }
+        // Check the key validity
+        return !auth.isEmpty() && auth.get(0).equals("Bearer " + key);
+    }
+}