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Implement PC/SC GET DATA command

This commit is contained in:
Henryk Plötz 2010-03-03 05:34:50 +01:00
parent 5035969f8d
commit 0270bcf9c9
1 changed files with 60 additions and 6 deletions
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66
readers.py
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@ -194,6 +194,17 @@ class ACR122_Reader(Smartcard_Reader):
yield self._CONNECT_NO_CARD
time.sleep(1)
@staticmethod
def _extract_historical_bytes_from_ats(ats):
hist_bytes = []
if ats[0] > 1:
interface_bytes = 0
if ats[1] & 0x40: interface_bytes = interface_bytes + 1
if ats[1] & 0x20: interface_bytes = interface_bytes + 1
if ats[1] & 0x10: interface_bytes = interface_bytes + 1
hist_bytes = ats[ (2+interface_bytes): ]
return hist_bytes
def get_ATR(self):
# FIXME Properly implement for PC/SC version 2
if self._current_target is None: return ""
@ -204,12 +215,7 @@ class ACR122_Reader(Smartcard_Reader):
if len(self._current_target.ats) > 0:
# Quick and dirty: Extract historical bytes from ATS
ats = self._current_target.ats
if ats[0] > 1:
interface_bytes = 0
if ats[1] & 0x40: interface_bytes = interface_bytes + 1
if ats[1] & 0x20: interface_bytes = interface_bytes + 1
if ats[1] & 0x10: interface_bytes = interface_bytes + 1
hist_bytes = ats[ (2+interface_bytes): ]
hist_bytes = self._extract_historical_bytes_from_ats(ats)
if len(hist_bytes) > 15: hist_bytes = hist_bytes[:15]
else:
return "\x3b\x80\x80\x01\x01"
@ -229,6 +235,54 @@ class ACR122_Reader(Smartcard_Reader):
def transceive(self, data):
try:
command = utils.C_APDU(data)
result = []
error = None
response = None
if command.cla == 0xff and command.ins == 0xca:
if command.p1 == 0x00:
# Get UID/PUPI
if self._current_target is None:
error = "\x6a\x81"
elif self._current_target.type == utils.PN532_Target.TYPE_ISO14443A:
result = self._current_target.nfcid
elif self._current_target.type == utils.PN532_Target.TYPE_ISO14443B:
result = self._current_target.atqb[1:5]
else:
error = "\x6a\x81"
elif command.p1 == 0x01:
# Get ATS historical bytes
if self._current_target is None:
error = "\x6a\x81"
elif self._current_target.type == utils.PN532_Target.TYPE_ISO14443A:
ats = self._current_target.ats
result = self._extract_historical_bytes_from_ats(ats)
else:
error = "\x6a\x81"
else:
error = "\x6a\x81"
if error is not None:
response = utils.R_APDU(error)
else:
if command.le is 0 or command.le == len(result):
response = utils.R_APDU(data=result, sw1=0x90, sw2=0)
elif command.le < len(result):
response = utils.R_APDU(sw1=0x6c, sw2=len(result))
elif command.le > len(result):
response = utils.R_APDU(data=result + [0] * (command.le-len(result)),
sw1=0x62, sw2=0x82)
if response is not None:
return response.render()
except:
# Just go on and try to process the data normally
pass
response = self.pn532_transceive("\xd4\x40" + chr(self._current_target_number) + data)
if response[2] != "\x00":
# FIXME Proper error processing