+ def _parse_timestamp(self, timestamp, datestring=None):
+ """parse timestamp in GnuPG's format
+
+ @rtype: L{datetime.datetime}
+ @returns: datetime object for the given timestamp
+ """
+ # The old implementation did only return the date. As we already
+ # used this for replay production, return the legacy value for
+ # old signatures.
+ if datestring is not None:
+ year, month, day = datestring.split('-')
+ date = datetime.date(int(year), int(month), int(day))
+ time = datetime.time(0, 0)
+ if date < datetime.date(2014, 8, 4):
+ return datetime.datetime.combine(date, time)
+
+ if 'T' in timestamp:
+ raise Exception('No support for ISO 8601 timestamps.')
+ return datetime.datetime.utcfromtimestamp(long(timestamp))
+