fix: [expansion] Better config field handling for various modules

- Testing if config is present before trying to
  look whithin the config field
- The config field should be there when the module
  is called form MISP, but it is not always the
  case when the module is queried from somewhere else

misp_modules/modules/expansion/farsight_passivedns.py

@@ -16,10 +16,9 @@ def handler(q=False):
     if q is False:
         return False
     request = json.loads(q)
-    if (request.get('config')):
-        if (request['config'].get('apikey') is None):
-            misperrors['error'] = 'Farsight DNSDB apikey is missing'
-            return misperrors
+    if not request.get('config') or not request['config'].get('apikey'):
+        misperrors['error'] = 'Farsight DNSDB apikey is missing'
+        return misperrors
     client = DnsdbClient(server, request['config']['apikey'])
     if request.get('hostname'):
         res = lookup_name(client, request['hostname'])

misp_modules/modules/expansion/macaddress_io.py

@@ -31,9 +31,8 @@ def handler(q=False):
     else:
         return False
 
-    if request['config'].get('api_key'):
+    if request.get('config') and request['config'].get('api_key'):
         api_key = request['config'].get('api_key')
-
     else:
         misperrors['error'] = 'Authorization required'
         return misperrors

misp_modules/modules/expansion/onyphe.py

@@ -24,7 +24,7 @@ def handler(q=False):
 
         request = json.loads(q)
 
-        if not request.get('config') and not (request['config'].get('apikey')):
+        if not request.get('config') or not request['config'].get('apikey'):
             misperrors['error'] = 'Onyphe authentication is missing'
             return misperrors
 

misp_modules/modules/expansion/onyphe_full.py

@@ -25,7 +25,7 @@ def handler(q=False):
 
         request = json.loads(q)
 
-        if not request.get('config') and not (request['config'].get('apikey')):
+        if not request.get('config') or not request['config'].get('apikey'):
             misperrors['error'] = 'Onyphe authentication is missing'
             return misperrors