mirror of
https://github.com/brmlab/brmdoor_libnfc.git
synced 2025-06-07 16:14:01 +02:00
67 lines
1.9 KiB
Python
Executable file
67 lines
1.9 KiB
Python
Executable file
#!/usr/bin/env python2
|
|
|
|
import sys
|
|
import os
|
|
import tempfile
|
|
|
|
from binascii import hexlify
|
|
|
|
from nfc_smartcard import NFCDevice, NFCError
|
|
from sign_uid import signUid
|
|
|
|
if len(sys.argv) < 2:
|
|
print "Usage: write_signed_ndef_on_desfire.py private_key_in_hex"
|
|
sys.exit(3)
|
|
|
|
tempFd = None
|
|
tempFname = None
|
|
|
|
try:
|
|
print "Opening NFC reader"
|
|
nfc = NFCDevice()
|
|
nfc.pollNr = 0xFF #poll indefinitely
|
|
print "Waiting for Desfire card to appear in the reader"
|
|
uid_hex = hexlify(nfc.scanUID())
|
|
key = sys.argv[1].decode("hex")
|
|
|
|
print "Got UID %s" % uid_hex
|
|
signature = signUid(key, uid_hex.decode("hex"))
|
|
(tempFd, tempFname) = tempfile.mkstemp(dir="/tmp")
|
|
signatureJson = '{"brmdoorSignature": "%s"}' % signature.encode("hex")
|
|
print "Writing signature JSON:", signatureJson
|
|
os.write(tempFd, signatureJson)
|
|
os.close(tempFd)
|
|
print "Wrote signature into %s" % tempFname
|
|
except NFCError, e:
|
|
#this exception happens also when scanUID times out
|
|
print("Failed to wait for Desfire card: %s" % e)
|
|
if tempFname:
|
|
os.unlink(tempFname)
|
|
sys.exit(1)
|
|
except Exception, e:
|
|
print("Something went wrong when writing the signature to file:", e)
|
|
if tempFname:
|
|
os.unlink(tempFname)
|
|
sys.exit(2)
|
|
finally:
|
|
nfc.close()
|
|
nfc.unload()
|
|
|
|
# We'll just call the command line tools so that we don't need to copy&paste the NDEF writing code to nfc_smartcard.cpp
|
|
print "Formatting card"
|
|
res = os.system("mifare-desfire-format -y")
|
|
if res != 0:
|
|
print "Formatting failed"
|
|
sys.exit(4)
|
|
print "Creating NDEF file/application"
|
|
res = os.system("mifare-desfire-create-ndef -y")
|
|
if res != 0:
|
|
print "Creating NDEF failed"
|
|
sys.exit(4)
|
|
print "Writing NDEF with signature onto Desfire"
|
|
res = os.system("mifare-desfire-write-ndef -y -i %s" % tempFname)
|
|
if res != 0:
|
|
print "Writing NDEF failed"
|
|
sys.exit(4)
|
|
|
|
print "All done"
|