def initCard():
log("Request to init new card")
card = None
while (card == None or card == 0):
card = pn532.read()
if (pn532.format() != 1):
log("Failed to format card")
return None
newhash = hashlib.sha256("%s %s %s" % (card[0],config.hashSecret,str(time.time()))).digest()
status = pn532.write(newhash)
if (status != 0):
log("Write failed: %s",(status))
return None
retries = 0
while(True):
card2 = pn532.read()
if ((card2[0] == card[0]) & (card2[1]==newhash)):
break
retries = retries + 1
if (retries > 5):
break
if ((card2[0] != card[0]) | (card2[1]!=newhash)):
log("Verify failed")
return None
log ("New card written serial=%s : hash=%s" % (card[0],binascii.hexlify(newhash)))
return(card[0],binascii.hexlify(newhash))
#!/usr/bin/python
import pn532
import hashlib
import binascii
import time
pn532.init()
card = None
while (card == None or card == 0):
card = pn532.read()
if (pn532.format() != 1):
print "Failed to format"
exit()
newhash = hashlib.sha256(card[0]+"newSecretValue"+time.time()).digest()
#print "New hash = ",binascii.hexlify(newhash)
#print "Writing card"
#newhash = "12345678901234567890123456789012"
status = pn532.write(newhash)
if (status != 0):
print "Write failed:\n",status
card2 = pn532.read()
if (card2 == card):
#Store in database
print "Success"
#print "Starting Value"
#print pn532.read()
#print "Waiting for card..."
#card = None
