def __init__(self, handle, protocol):
self._handle = handle
self._protocol = protocol
command = [0x00, 0xA4, 0x04, 0x00]
command.append(len(self.CARD_AID))
command.extend(self.CARD_AID)
command.append(0x00)
scard.SCardTransmit(handle, protocol, command)
def select_path(self, path):
"""Select path on card"""
request = CardCommand.SELECT_PATH[:]
request.append(len(path))
request.extend(path)
request.append(0x01)
# transmit command to card
result, response = scard.SCardTransmit(self._handle, self._protocol,
request)
# raise error if needed
if result != scard.SCARD_S_SUCCESS:
# failed selecting path
message = scard.SCardGetErrorMessage(result)
raise SelectPathError('Error selecting path: {0}'.format(message))
return response
def get_data(self, command):
"""Get data from card"""
data = None
# get data from card
result, response = scard.SCardTransmit(self._handle, self._protocol,
command)
# raise error if needed
if result != scard.SCARD_S_SUCCESS:
# failed reading data from card
message = scard.SCardGetErrorMessage(result)
raise GetDataError('Error reading card: {0}'.format(message))
else:
data = response
return data[:-2]
def transmit(hcard, proto_hdr, bytes_):
rv, resp = sc.SCardTransmit(hcard, proto_hdr, bytes_)
if rv != 0:
raise NFCException(rv)
return resp