Use ValueError instead of Exception

Signed-off-by: Ivan Kanakarakis <ivan.kanak@gmail.com>

Author: c00kiemon5ter

src/saml2/sigver.py

@@ -357,7 +357,7 @@ def split_len(seq, length):
 
 def to_time(_time):
     if not _time.endswith(' GMT'):
-        raise Exception('Time does not end with GMT')
+        raise ValueError('Time does not end with GMT')
     _time = _time[:-4]
     return mktime(str_to_time(_time, M2_TIME_FORMAT))
 

src/saml2/time_util.py

@@ -68,7 +68,7 @@ def parse_duration(duration):
     else:
         sign = '+'
     if duration[index] != "P":
-        raise Exception('Parse Duration is not valid.')
+        raise ValueError('Parse Duration is not valid.')
     index += 1
 
     dic = dict([(typ, 0) for (code, typ) in D_FORMAT if typ])
@@ -77,14 +77,14 @@ def parse_duration(duration):
     for code, typ in D_FORMAT:
         #print(duration[index:], code)
         if duration[index] == '-':
-            raise Exception("Negation not allowed on individual items")
+            raise ValueError("Negation not allowed on individual items")
         if code == "T":
             if duration[index] == "T":
                 index += 1
                 if index == len(duration):
-                    raise Exception("Not allowed to end with 'T'")
+                    raise ValueError("Not allowed to end with 'T'")
             else:
-                raise Exception("Missing T")
+                raise ValueError("Missing T")
         elif duration[index] == "T":
             continue
         else: