def nfc_open(connstring=_connstring):
"""Open the PN532 for reading.
Use this like so:
with reader.nfc_open() as device:
do_stuff_with_device(device)
Automatically takes care of closing the connection for you.
Fun fact: you can (and should) do this with regular file open() as well.
"""
ctx = nfc.init()
if ctx is None:
raise RuntimeError('Couldn\'t init libnfc')
device = nfc.open(ctx, connstring)
if device is None:
raise NFCError('Couldn\'t open NFC device', {'connstring': connstring})
try:
if nfc.initiator_init(device) < 0:
raise NFCError('Couldn\'t init NFC device',
{'connstring': connstring})
yield device
finally:
# cleanup...
nfc.close(device)
nfc.exit(ctx)
def get_tag():
context = nfc.init()
pnd = nfc.open(context)
if pnd is None:
print('ERROR: Unable to open NFC device.')
exit()
if nfc.initiator_init(pnd) < 0:
nfc.perror(pnd, "nfc_initiator_init")
print('ERROR: Unable to init NFC device.')
exit()
# Declare modulations
nmMifare = nfc.modulation()
nmMifare.nmt = nfc.NMT_ISO14443A
nmMifare.nbr = nfc.NBR_106
nt = nfc.target()
# Wait for tag
ret = nfc.initiator_select_passive_target(pnd, nmMifare, 0, 0, nt)
# Convert raw uid to hex, then trim to length (2*nt.nti.nai.szUidLen)
tag = ''.join(format(x, '02x') for x in nt.nti.nai.abtUid)[:2*nt.nti.nai.szUidLen]
nfc.close(pnd)
nfc.exit(context)
# Return UID
return tag
def nfcInitListen():
""" Open nfc device and set opened NFC device to initiator mode:
"""
global pnd, context
pnd = nfc.open(context)
if pnd is None:
print('ERROR: Unable to open NFC device.')
sys.exit(1)
if nfc.initiator_init(pnd) < 0:
nfc.perror(pnd, "nfc_initiator_init")
print('ERROR: Unable to init NFC device.')
sys.exit(1)
print('NFC reader: %s opened' % nfc.device_get_name(pnd))
def init_reader(callback):
context = nfc.init()
devs = nfc.list_devices(context, 16)
if devs:
for dev in devs:
pnd = nfc.open(context, dev)
if pnd:
if nfc.initiator_init(pnd) < 0:
nfc.perror(pnd, "nfc_initator_init")
nfc.close(pnd)
else:
reader = NFCReader(context, pnd, callback)
reader.daemon = True
reader.start()
else:
print("failed to find a NFC device")
def init_reader(callback):
context = nfc.init()
devs = nfc.list_devices(context, 16)
if devs:
for dev in devs:
pnd = nfc.open(context, dev)
if pnd:
if nfc.initiator_init(pnd) < 0:
nfc.perror(pnd, "nfc_initator_init")
nfc.close(pnd)
else:
reader = NFCReader(context, pnd, callback)
reader.daemon = True
reader.start()
else:
print("failed to find a NFC device")
def open_device(self):
# return if device is already initialized
if self.device:
return
# make sure everything is shut down before initalizing
self.shutdown()
self.context = nfc.init()
print("{} uses libnfc {}".format(sys.argv[0], nfc.__version__))
connstrings = nfc.list_devices(self.context, max_device_count)
szDeviceFound = len(connstrings)
if szDeviceFound == 0:
raise Exception("No NFC reader found!")
for i in range(szDeviceFound):
self.device = nfc.open(self.context, connstrings[i])
if self.device is None:
continue
if(nfc.initiator_init(self.device)<0):
nfc.perror(self.device, "nfc_initiator_init")
raise Exception("Init of device failed!")
print("NFC reader:", nfc.device_get_name(self.device), "opened")
break
def try_read():
if nfc.initiator_select_passive_target(pnd, nmMifare, 0, 0, nt) > -1:
return read_sector(7)
@atexit.register
def close():
nfc.close(pnd)
nfc.exit(context)
accessBits = compute_access_bits(c1, c2, c3)
context = nfc.init()
pnd = nfc.open(context)
if pnd is None:
raise Exception('ERROR: Unable to open NFC device.')
if nfc.initiator_init(pnd) < 0:
nfc.perror(pnd, "nfc_initiator_init")
raise Exception('ERROR: Unable to init NFC device.')
print('NFC reader: %s opened' % nfc.device_get_name(pnd))
nmMifare = nfc.modulation()
nmMifare.nmt = nfc.NMT_ISO14443A
nmMifare.nbr = nfc.NBR_106
nt = nfc.target()
# Ensure ^C doesn't corrupt/leave anything broken.
signal.signal(signal.SIGINT, signal_handler)
conn = sqlite3.connect('/var/db/assurpid/assurpid.db')
output('opened database successfully')
output('libnfc version: ' + nfc.__version__)
context = nfc.init()
pnd = nfc.open(context)
if pnd is None:
output('ERROR: Unable to detect RFID sensor (run this as root).')
exit()
if nfc.initiator_init(pnd) < 0:
nfc.perror(pnd, "nfc_initiator_init")
output('ERROR: Unable to init RFID sensor.')
exit()
output('NFC reader: ' + nfc.device_get_name(pnd) + 'opened')
nmMifare = nfc.modulation()
nmMifare.nmt = nfc.NMT_ISO14443A
nmMifare.nbr = nfc.NBR_106
nt = nfc.target()
admin_switch = False
while True:
# Display libnfc version
print("%s uses libnfc %s" %( sys.argv[0], nfc.__version__))
# TODO
connstrings = nfc.list_devices(context, max_device_count)
szDeviceFound = len(connstrings)
if szDeviceFound == 0:
print("No NFC device found.")
for i in range(szDeviceFound):
pnd = nfc.open(context, connstrings[i]);
if pnd is None:
continue
if(nfc.initiator_init(pnd)<0):
nfc.perror(pnd, "nfc_initiator_init")
nfc.close(pnd)
nfc.exit(context)
exit()
print("NFC reader:", nfc.device_get_name(pnd), "opened")
nm = nfc.modulation()
if mask & 0x1:
nm.nmt = nfc.NMT_ISO14443A
nm.nbr = nfc.NBR_106
# List ISO14443A targets
res, ant = nfc.initiator_list_passive_targets(pnd, nm, max_target_count)
if (res >= 0):
if (verbose or (res > 0)):
