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add RfidAccess class

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This commit is contained in:
danjperron
2021-09-15 12:48:10 -04:00
parent 037be68272
commit 683af24b6e
8 changed files with 546 additions and 51 deletions
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91
Pico_example/CreateNdefTag.py Normal file
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from mfrc522 import MFRC522
from RfidAccess import RfidAccess
import utime
reader = MFRC522(spi_id=0,sck=2,miso=4,mosi=3,cs=1,rst=0)
access = RfidAccess()
print("")
print("Please place card on reader")
print("")
def checksum(data):
crc = 0xc7
for byte in data:
crc ^= byte
for _ in range(8):
msb = crc & 0x80
crc = (crc << 1) & 0xff
if msb:
crc ^= 0x1d
return crc
PreviousCard = [0]
try:
while True:
reader.init()
(stat, tag_type) = reader.request(reader.REQIDL)
if stat == reader.OK:
(stat, uid) = reader.SelectTagSN()
if uid == PreviousCard:
continue
if stat == reader.OK:
print("Card detected {} uid={}".format(hex(int.from_bytes(bytes(uid),"little",False)).upper(),reader.tohexstring(uid)))
defaultKey = [255,255,255,255,255,255]
firstSectorKey = [0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5]
nextSectorKey = [0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7]
#set MAD sector
# first fill block permission
access.setTrailerAccess(keyA_Write=access.KEYB,access_Read=access.KEYAB,access_Write=access.KEYB,
keyB_Read=access.NEVER,keyB_Write=access.KEYB)
access.setBlockAccess(access.ALLBLOCK, access_Read=access.KEYAB, access_Write=access.KEYB,
access_Inc=access.NEVER, access_Dec=access.NEVER)
block3 = access.fillBlock3(keyA=firstSectorKey,keyB=defaultKey)
#Write the sector access
if reader.writeSectorBlock(uid,0,3,block3,keyA=defaultKey) == reader.ERR:
print("Writing MAD sector failed!")
else:
print(".",end="")
b1 = [0x14,0x01,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1]
b1[0] = checksum(b1[1:]) # I know this is already ok but just to demonstrate the CRC
reader.writeSectorBlock(uid,0,1,b1,keyB=defaultKey)
b2 = [0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1,0x03,0xE1]
reader.writeSectorBlock(uid,0,2,b1,keyB=defaultKey)
#set permission for all other sectors
access.setTrailerAccess(keyA_Write=access.KEYB,access_Read=access.KEYAB,access_Write=access.KEYB,
keyB_Read=access.NEVER,keyB_Write=access.KEYB)
access.setBlockAccess(access.ALLBLOCK, access_Read=access.KEYAB, access_Write=access.KEYAB,
access_Inc=access.KEYAB, access_Dec=access.KEYAB)
block3 = access.fillBlock3(keyA=nextSectorKey,keyB=defaultKey)
#Write all next sectors access
for sector in range(1,16):
if reader.writeSectorBlock(uid,sector,3,block3,keyA=defaultKey) == reader.ERR:
print("\nWriting to sector ",sector," Failed!")
break
else:
print(".",end="")
#force sector 1 to be 1 record empty
block= 16 *[0]
block[2]=0xfe
if reader.writeSectorBlock(uid,1,0,block,keyB=defaultKey) == reader.ERR:
print("Unable to set first NDEF record!")
print("\nDone.")
previousCard=uid
break
else:
PreviousCard=[0]
utime.sleep_ms(50)
except KeyboardInterrupt:
print("Bye")

70
Pico_example/EraseNdefTag.py Normal file
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from mfrc522 import MFRC522
from RfidAccess import RfidAccess
import utime
reader = MFRC522(spi_id=0,sck=2,miso=4,mosi=3,cs=1,rst=0)
access = RfidAccess()
print("")
print("Please place card on reader")
print("")
PreviousCard = [0]
try:
while True:
reader.init()
(stat, tag_type) = reader.request(reader.REQIDL)
if stat == reader.OK:
(stat, uid) = reader.SelectTagSN()
if uid == PreviousCard:
continue
if stat == reader.OK:
print("Card detected {} uid={}".format(hex(int.from_bytes(bytes(uid),"little",False)).upper(),reader.tohexstring(uid)))
firstSectorKey = [0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5]
nextSectorKey = [0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7]
defaultKey = [255,255,255,255,255,255]
# set default access
access.decodeAccess(0xff,0x07,0x80)
block3 = access.fillBlock3(keyA=defaultKey,keyB=defaultKey)
print("Reset Mad Sector (first sector)")
#reset first sector
reader.writeSectorBlock(uid,0,3,block3,keyB=defaultKey)
#erase block1 and 2
datablock = 16 * [0]
reader.writeSectorBlock(uid,0,1,datablock,keyB=defaultKey)
reader.writeSectorBlock(uid,0,2,datablock,keyB=defaultKey)
#reset all other sectors
for s in range(1,16):
# permission to default
print("Reset sector ",s)
reader.writeSectorBlock(uid,s,3,block3,keyB=defaultKey)
for b in range(3):
# put all data to zero block 0,1 and 2
reader.writeSectorBlock(uid,s,b,datablock,keyB=defaultKey)
# ok dump new data
print("\n---- Dump card using defaultkeyB [0xff, 0xff, 0xff, 0xff, 0xff, 0xff]\n")
reader.MFRC522_DumpClassic1K(uid, Start=0, End=64, keyB=defaultKey)
PreviousCard = uid
break
else:
pass
#print("Authentication error")
else:
PreviousCard=[0]
utime.sleep_ms(50)
except KeyboardInterrupt:
print("Bye")
print("Card done!")

45
Pico_example/Pico_read.py Normal file
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from mfrc522 import MFRC522
import utime
def uidToString(uid):
mystring = ""
for i in uid:
mystring = "%02X" % i + mystring
return mystring
reader = MFRC522(spi_id=0,sck=2,miso=4,mosi=3,cs=1,rst=0)
print("")
print("Please place card on reader")
print("")
PreviousCard = [0]
try:
while True:
reader.init()
(stat, tag_type) = reader.request(reader.REQIDL)
#print('request stat:',stat,' tag_type:',tag_type)
if stat == reader.OK:
(stat, uid) = reader.SelectTagSN()
if uid == PreviousCard:
continue
if stat == reader.OK:
print("Card detected {} uid={}".format(hex(int.from_bytes(bytes(uid),"little",False)).upper(),reader.tohexstring(uid)))
defaultKey = [255,255,255,255,255,255]
reader.MFRC522_DumpClassic1K(uid, Start=0, End=64, keyA=defaultKey)
print("Done")
PreviousCard = uid
else:
pass
else:
PreviousCard=[0]
utime.sleep_ms(50)
except KeyboardInterrupt:
pass

55
Pico_example/Pico_write.py Normal file
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from mfrc522 import MFRC522
'''
BE AWARE that sectors(3,7,11,15,...,63) are access block.
if you want to change (sector % 4) == 3 you should
know how keys and permission work!
'''
def uidToString(uid):
mystring = ""
for i in uid:
mystring = "%02X" % i + mystring
return mystring
reader = MFRC522(spi_id=0,sck=2,miso=4,mosi=3,cs=1,rst=0)
print("")
print("Please place card on reader")
print("")
key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
try:
while True:
(stat, tag_type) = reader.request(reader.REQIDL)
if stat == reader.OK:
(stat, uid) = reader.SelectTagSN()
if stat == reader.OK:
print(uid)
print("Card detected %s" % uidToString(uid))
reader.MFRC522_DumpClassic1K(uid,keyA=key)
print("Test ! writing sector 2, block 0 (absolute block(8)")
print("with [ 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 ]")
absoluteBlock=8
value=[]
for i in range(16):
value.append(i)
status = reader.auth(reader.AUTHENT1A, absoluteBlock, key, uid)
if status == reader.OK:
status = reader.write(absoluteBlock,value)
if status == reader.OK:
reader.MFRC522_DumpClassic1K(uid,keyA=key)
else:
print("unable to write")
else:
print("Authentication error for writing")
break
except KeyboardInterrupt:
print("Bye")

47
Pico_example/ReadNdefTag.py Normal file
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from mfrc522 import MFRC522
import utime
reader = MFRC522(spi_id=0,sck=2,miso=4,mosi=3,cs=1,rst=0)
print("")
print("Place card into reader")
print("")
PreviousCard = [0]
try:
while True:
reader.init()
(stat, tag_type) = reader.request(reader.REQIDL)
if stat == reader.OK:
(stat, uid) = reader.SelectTagSN()
if uid == PreviousCard:
continue
if stat == reader.OK:
print("Card detected {} uid={}".format(hex(int.from_bytes(bytes(uid),"little",False)).upper(),reader.tohexstring(uid)))
firstSectorKey = [0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5]
nextSectorKey = [0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7]
#defaultKey = [255,255,255,255,255,255]
#read MAD sector (first sector)
if reader.MFRC522_DumpClassic1K(uid, Start=0, End=4, keyA=firstSectorKey)== reader.OK:
#read the rest of the card
reader.MFRC522_DumpClassic1K(uid, Start=4, End=64, keyA=nextSectorKey)
print("Done")
PreviousCard = uid
else:
PreviousCard=[0]
utime.sleep_ms(50)
except KeyboardInterrupt:
print("Bye")