authentication fails if timeout exceeded

dataserv/Farmer.py

@@ -51,7 +51,7 @@ def authenticate(self, header_authorization, header_date):
         date = datetime(*parsedate(header_date)[:6])
         timeout = self.get_server_authentication_timeout()
         delta = datetime.now() - date
-        if delta > timedelta(seconds=timeout):
+        if delta >= timedelta(seconds=timeout):
             raise ValueError("Header date to old!")
 
         # verify signature

tests/test_Farmer.py

@@ -6,6 +6,7 @@
 from dataserv.Farmer import Farmer
 from email.utils import formatdate
 from datetime import datetime
+from datetime import timedelta
 from time import mktime
 
 
@@ -115,10 +116,26 @@ def test_authentication_success(self):
         address = blockchain.get_address(wif)
         farmer = Farmer(address)
 
-        # first authentication
         header_date = formatdate(timeval=mktime(datetime.now().timetuple()),
                                  localtime=True, usegmt=True)
         message = farmer.get_server_address() + " " + header_date
         header_authorization = blockchain.sign_unicode(wif, message)
         self.assertTrue(farmer.authenticate(header_authorization, header_date))
 
+    def test_authentication_timeout(self):
+        def callback():
+            blockchain = BtcTxStore()
+            wif = blockchain.create_key()
+            address = blockchain.get_address(wif)
+            farmer = Farmer(address)
+
+            timeout = farmer.get_server_authentication_timeout()
+
+            date = datetime.now() - timedelta(seconds=timeout)
+            header_date = formatdate(timeval=mktime(date.timetuple()),
+                                     localtime=True, usegmt=True)
+            message = farmer.get_server_address() + " " + header_date
+            header_authorization = blockchain.sign_unicode(wif, message)
+            farmer.authenticate(header_authorization, header_date)
+        self.assertRaises(ValueError, callback)
+