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from typing import Union
from public import public
from smartcard.CardConnection import CardConnection
from smartcard.System import readers
from smartcard.pcsc.PCSCCardConnection import PCSCCardConnection
from smartcard.pcsc.PCSCReader import PCSCReader
from .ISO7816 import ISO7816Target, CommandAPDU, ResponseAPDU
@public
class PCSCTarget(ISO7816Target): # pragma: no cover
"""A smartcard target communicating via PCSC."""
def __init__(self, reader: Union[str, PCSCReader]):
if isinstance(reader, str):
rs = readers()
for r in rs:
if r.name == reader:
self.reader = r
break
else:
raise ValueError("Reader '{}' not found.".format(reader))
else:
self.reader = reader
self.connection: PCSCCardConnection = self.reader.createConnection()
def connect(self):
self.connection.connect(CardConnection.T0_protocol | CardConnection.T1_protocol)
@property
def atr(self) -> bytes:
return bytes(self.connection.getATR())
def select(self, aid: bytes) -> bool:
apdu = CommandAPDU(0x00, 0xa4, 0x04, 0x00, aid)
resp = self.send_apdu(apdu)
return resp.sw == 0x9000
def send_apdu(self, apdu: CommandAPDU) -> ResponseAPDU:
resp, sw1, sw2 = self.connection.transmit(bytes(apdu))
return ResponseAPDU(bytes(resp), sw1 << 8 | sw2)
def disconnect(self):
self.connection.disconnect()
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