Add quick and dirty fake ATR generation for T=CL tags

henryk_github
Henryk Plötz 13 years ago
parent da261b1332
commit 6d38cdfbf0
  1. 38
      readers.py

@ -8,7 +8,7 @@ pycsc you'll need to downgrade to SVN revision 246.
"""
raise
import sys, utils, getopt, binascii
import sys, utils, getopt, binascii, time
class Smartcard_Reader(object):
def list_readers(cls):
@ -139,6 +139,7 @@ class ACR122_Reader(Smartcard_Reader):
def __init__(self, parent):
self._parent = parent
self._name = self._parent.name+"-RFID"
self._last_ats = None
def pn532_transceive_raw(self, command):
c_apdu = "\xff\x00\x00\x00" + chr(len(command)) + command
@ -166,23 +167,48 @@ class ACR122_Reader(Smartcard_Reader):
self.pn532_transceive("\xd4\x32\x01\x00")
self.pn532_transceive("\xd4\x32\x01\x01")
self._last_ats = []
response = self.pn532_transceive("\xd4\x4a\x01\x00")
if ord(response[2]) > 0:
r = utils.PN532_Frame(response)
r.parse_result(0)
if len(r.targets) > 0:
self._last_ats = r.targets.values()[0].ats
return True
else:
response = self.pn532_transceive("\xd4\x4a\x01\x03\x00")
if ord(response[2]) > 0:
r = utils.PN532_Frame(response)
r.parse_result(3)
if len(r.targets) > 0:
return True
def _internal_connect(self):
self._parent.connect()
self.pn532_transceive("\xd4\x32\x05\x00\x00\x00")
self.pn532_acquire_card()
yield self._CONNECT_DONE
while True:
if self.pn532_acquire_card():
yield self._CONNECT_DONE
else:
yield self._CONNECT_NO_CARD
time.sleep(1)
def get_ATR(self):
# FIXME Properly implement for PC/SC version 2
return "\x3b\x80\x80\x01\x01"
if len(self._last_ats) == 0:
return "\x3b\x80\x80\x01\x01"
else:
# Quick and dirty: Extract historical bytes from ATS
hist_bytes = []
if self._last_ats[0] > 1:
interface_bytes = 0
if self._last_ats[1] & 0x40: interface_bytes = interface_bytes + 1
if self._last_ats[1] & 0x20: interface_bytes = interface_bytes + 1
if self._last_ats[1] & 0x10: interface_bytes = interface_bytes + 1
hist_bytes = self._last_ats[ (2+interface_bytes): ]
if len(hist_bytes) > 15: hist_bytes = hist_bytes[:15]
atr = [0x3b, 0x80 + len(hist_bytes), 0x80, 0x01] + hist_bytes
atr.append( reduce(lambda a,b: a ^ b, atr) ^ 0x3b )
return "".join(map(chr, atr))
def transceive(self, data):
# FIXME Properly determine target number

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