def assignRFIDTag(self, user):
while(self.lock == True):
print "still locked (assignRFIDTag)"
time.sleep(0.15)
self.lock = True
print "background-worker assign"
(status,TagType) = RFIDReader.MFRC522_Request(RFIDReader.PICC_REQIDL)
(status,uid) = RFIDReader.MFRC522_Anticoll()
# If we have the UID, continue
if status == RFIDReader.MI_OK:
# Print UID
uid_str = str(uid[0])+"." +str(uid[1])+"."+str(uid[2])+"."+str(uid[3])
print "Card read UID: " + uid_str
if(uid_str != user.cardID)
print "Wrong cardID detected while assigning RFID-tag to user"
return False
# This is the default key for authentication
key = []
secret = []
# extract keyA from database and print it
formated_key_list = user.cardAuthKeyA.split()
for x in formated_key_list:
key.append(int(x, 16))
print key
# extract secret from database and print it
formated_secret_list = user.cardSecret.split()
for x in formated_secret_list:
secret.append(int(x, 16))
print secret
# Select the scanned tag
RFIDReader.MFRC522_SelectTag(uid)
# Authenticate for auth-sector
status = RFIDReader.MFRC522_Auth(RFIDReader.PICC_AUTHENT1A, user.cardAuthSector * 4 + user, key, uid)
# Check if authenticated
if status == RFIDReader.MI_OK:
# read trailer from auth-sector
RFIDReader.MFRC522_Read(user.cardAuthSector * 4 + 3)
# read auth block in auth-sector
RFIDReader.MFRC522_Read(user.cardAuthSector * 4 + user.cardAuthBlock)
# write secret to auth block in auth-sector
RFIDReader.MFRC522_Write(user.cardAuthSector * 4 + user.cardAuthBlock, secret)
# read back secret from auth block in auth-sector
RFIDReader.MFRC522_Read(user.cardAuthSector * 4 + user.cardAuthBlock)
RFIDReader.MFRC522_StopCrypto1()
# unlock and return succesfully
self.lock = False
return True
else:
print "Authentication error"
self.lock = False
return False
self.lock = False
return False
def withdrawRFIDTag(self, user):
while (self.lock == True):
if config.DEBUG == False:
print "still locked (withdrawRFIDTag)"
time.sleep(0.3)
try:
self.lock = True
time.sleep(0.2)
print "background-worker withdrawRFIDTag"
for i in range(0, 4):
(status,
TagType) = RFIDReader.MFRC522_Request(RFIDReader.PICC_REQIDL)
(status, uid) = RFIDReader.MFRC522_Anticoll()
if status == RFIDReader.MI_OK:
break
else:
print "retry anticoll card (withdrawRFIDTag)"
time.sleep(0.3)
# If we have the UID, continue
if status == RFIDReader.MI_OK:
# Print UID
uid_str = str(uid[0]) + "." + str(uid[1]) + "." + str(
uid[2]) + "." + str(uid[3])
print "Card read UID: " + uid_str
if (uid_str != user.cardID):
print "Wrong cardID detected while withdrawing RFID-tag to user"
self.lock = False
return False
# This is the default key for authentication
defaultkey = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
defaultsecret = [
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
]
userkey = []
usersecret = []
userkeyString = user.cardAuthKeyA
for x in userkeyString.split('-'):
userkey.append(int(x, 16))
print "Userkey: " + str(userkey)
usersecretString = user.cardSecret
for x in usersecretString.split('-'):
usersecret.append(int(x, 16))
print "Usersecret: " + str(usersecret)
SecretBlockAddr = user.cardAuthSector * 4 + user.cardAuthBlock
TrailerBlockAddr = user.cardAuthSector * 4 + 3
# Select the scanned tag
RFIDReader.MFRC522_SelectTag(uid)
# Authenticate for secret-block
status = RFIDReader.MFRC522_Auth(RFIDReader.PICC_AUTHENT1A,
SecretBlockAddr, userkey, uid)
# write user secret
if status == RFIDReader.MI_OK:
RFIDReader.MFRC522_Write(SecretBlockAddr, defaultsecret)
else:
print "Authentication error while write rfid-tag secret sector"
self.lock = False
return False
status = RFIDReader.MFRC522_Auth(RFIDReader.PICC_AUTHENT1A,
TrailerBlockAddr, userkey,
uid)
# Check if authenticated
if status == RFIDReader.MI_OK:
print "Read TrailerBlock :"
# Read block 8
result = RFIDReader.MFRC522_Read(TrailerBlockAddr)
print result
for x in range(0, 6):
result[x] = 0xFF
print result
print "Write new trailer:"
# Write the data
RFIDReader.MFRC522_Write(TrailerBlockAddr, result)
print "\n"
RFIDReader.MFRC522_StopCrypto1()
# unlock and return succesfully
self.lock = False
return True
else:
print "Authentication error while write rfid-tag key sector"
self.lock = False
return False
else:
print "Authentication error while looking for cards"
self.lock = False
return False
except:
self.lock = False
print "unexpected error withdrawRFIDTag"
raise