Handle null headers properly in auth filters.

Author: byteduck-exploit

src/main/kotlin/org/exploit/keeper/filter/KeeperAuthFilter.kt

@@ -22,12 +22,12 @@ class KeeperAuthFilter(
             return
 
         val instanceId = p0.getHeaderString(KeeperAuthenticator.HEADER_INSTANCE_ID)
-            .toIntOrNull() ?: throw NotAuthorizedException("Invalid instance id")
+            ?.toIntOrNull() ?: throw NotAuthorizedException("Invalid instance id")
 
         val signature = p0.getHeaderString(KeeperAuthenticator.HEADER_SIGNATURE)
             ?: throw NotAuthorizedException("Missing signature")
 
-        val timestamp = p0.getHeaderString(KeeperAuthenticator.HEADER_TIMESTAMP).toLongOrNull()
+        val timestamp = p0.getHeaderString(KeeperAuthenticator.HEADER_TIMESTAMP)?.toLongOrNull()
             ?: throw NotAuthorizedException("Missing timestamp")
 
         try {

src/main/kotlin/org/exploit/keeper/filter/MachineAuthFilter.kt

@@ -42,7 +42,7 @@ class MachineAuthFilter(
             return
         }
 
-        val token = ctx.getHeaderString(HEADER)
+        val token: String? = ctx.getHeaderString(HEADER)
 
         if (token.isNullOrBlank()) {
             ctx.abortWith(Response.status(Response.Status.UNAUTHORIZED).build())