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import binascii, re, sys, cards
class Application:
# This must be a sequence of regular expressions
# When an application is selected through a matching AID
# then all correponding classes are merged into the card
# object.
# The application classes themselves are responsible for
# unmerging, should their application become deselected.
# However, the default implementation in the generic
# Application class which triggers unmerging on a card reset
# and a successfull SELECT APPLICATION should be sufficient
# in most cases.
# (Still haven't thought this through, though...)
## FIXME Unloading is not implemented yet
#
# NOTE: Implementing classes MUST derive from Application
AID_LIST = []
def load_applications(card, aid):
classes_to_load = []
for i in dir(cards):
possible_class = getattr(cards, i)
if not hasattr(possible_class, "DRIVER_NAME") or not issubclass(possible_class, Application):
continue
if possible_class.can_handle_aid(card, aid):
classes_to_load.append(possible_class)
print ".oO(Loading application '%s')" % possible_class.DRIVER_NAME
card.add_classes(classes_to_load)
load_applications = staticmethod(load_applications)
def can_handle_aid(cls, card, aid):
for i in cls.AID_LIST:
if re.match(i+"$", binascii.b2a_hex(aid), re.I):
return True
return False
can_handle_aid = classmethod(can_handle_aid)
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