mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-18 14:10:36 -07:00
267 lines
8.9 KiB
Python
Executable File
267 lines
8.9 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# mfdread.py - Mifare dumps parser in human readable format
|
|
# Pavel Zhovner <pavel@zhovner.com>
|
|
# https://github.com/zhovner/mfdread
|
|
#
|
|
#Dependencies:
|
|
# easy_install bitstring
|
|
#or
|
|
# pip install bitstring
|
|
#Usage:
|
|
# pm3_mfdread.py ./dump.mfd
|
|
#
|
|
|
|
import codecs
|
|
import copy
|
|
import sys
|
|
from collections import defaultdict
|
|
|
|
try:
|
|
from bitstring import BitArray
|
|
except ModuleNotFoundError:
|
|
print("Please install bitstring module first.")
|
|
sys.exit(1)
|
|
|
|
class Options:
|
|
FORCE_1K = False
|
|
|
|
|
|
if len(sys.argv) == 1:
|
|
sys.exit('''
|
|
------------------
|
|
Usage: pm3_mfdread.py ./dump.mfd
|
|
Mifare dumps reader.
|
|
''')
|
|
|
|
|
|
def decode(bytes):
|
|
decoded = codecs.decode(bytes, "hex")
|
|
try:
|
|
return str(decoded, "utf-8").rstrip(b'\0')
|
|
except:
|
|
return ""
|
|
|
|
|
|
class bashcolors:
|
|
BLUE = '\033[34m'
|
|
RED = '\033[91m'
|
|
GREEN = '\033[32m'
|
|
WARNING = '\033[93m'
|
|
ENDC = '\033[0m'
|
|
|
|
|
|
def accbits_for_blocknum(accbits_str, blocknum):
|
|
'''
|
|
Decodes the access bit string for block "blocknum".
|
|
Returns the three access bits for the block or False if the
|
|
inverted bits do not match the access bits.
|
|
'''
|
|
bits = BitArray([0])
|
|
inverted = BitArray([0])
|
|
|
|
# Block 0 access bits
|
|
if blocknum == 0:
|
|
bits = BitArray([accbits_str[11], accbits_str[23], accbits_str[19]])
|
|
inverted = BitArray([accbits_str[7], accbits_str[3], accbits_str[15]])
|
|
|
|
# Block 0 access bits
|
|
elif blocknum == 1:
|
|
bits = BitArray([accbits_str[10], accbits_str[22], accbits_str[18]])
|
|
inverted = BitArray([accbits_str[6], accbits_str[2], accbits_str[14]])
|
|
# Block 0 access bits
|
|
elif blocknum == 2:
|
|
bits = BitArray([accbits_str[9], accbits_str[21], accbits_str[17]])
|
|
inverted = BitArray([accbits_str[5], accbits_str[1], accbits_str[13]])
|
|
# Sector trailer / Block 3 access bits
|
|
elif blocknum in (3, 15):
|
|
bits = BitArray([accbits_str[8], accbits_str[20], accbits_str[16]])
|
|
inverted = BitArray([accbits_str[4], accbits_str[0], accbits_str[12]])
|
|
|
|
# Check the decoded bits
|
|
inverted.invert()
|
|
if bits.bin == inverted.bin:
|
|
return bits
|
|
else:
|
|
return False
|
|
|
|
|
|
def accbits_to_permission_sector(accbits):
|
|
permissions = {
|
|
'000': "- A | A - | A A [read B]",
|
|
'010': "- - | A - | A - [read B]",
|
|
'100': "- B | A/B - | - B",
|
|
'110': "- - | A/B - | - -",
|
|
'001': "- A | A A | A A [transport]",
|
|
'011': "- B | A/B B | - B",
|
|
'101': "- - | A/B B | - -",
|
|
'111': "- - | A/B - | - -",
|
|
}
|
|
if isinstance(accbits, BitArray):
|
|
return permissions.get(accbits.bin, "unknown")
|
|
else:
|
|
return ""
|
|
|
|
|
|
def accbits_to_permission_data(accbits):
|
|
permissions = {
|
|
'000': "A/B | A/B | A/B | A/B [transport]",
|
|
'010': "A/B | - | - | - [r/w]",
|
|
'100': "A/B | B | - | - [r/w]",
|
|
'110': "A/B | B | B | A/B [value]",
|
|
'001': "A/B | - | - | A/B [value]",
|
|
'011': " B | B | - | - [r/w]",
|
|
'101': " B | - | - | - [r/w]",
|
|
'111': " - | - | - | - [r/w]",
|
|
}
|
|
if isinstance(accbits, BitArray):
|
|
return permissions.get(accbits.bin, "unknown")
|
|
else:
|
|
return ""
|
|
|
|
|
|
def accbit_info(accbits, sector_size):
|
|
'''
|
|
Returns a dictionary of a access bits for all three blocks in a sector.
|
|
If the access bits for block could not be decoded properly, the value is set to False.
|
|
'''
|
|
access_bits = defaultdict(lambda: False)
|
|
|
|
if sector_size == 15:
|
|
access_bits[sector_size] = accbits_for_blocknum(accbits, sector_size)
|
|
return access_bits
|
|
|
|
# Decode access bits for all 4 blocks of the sector
|
|
for i in range(0, 4):
|
|
access_bits[i] = accbits_for_blocknum(accbits, i)
|
|
return access_bits
|
|
|
|
|
|
def print_info(data):
|
|
blocksmatrix = []
|
|
blockrights = {}
|
|
block_number = 0
|
|
|
|
data_size = len(data)
|
|
|
|
if data_size not in {4096, 1024}:
|
|
sys.exit("Wrong file size: %d bytes.\nOnly 1024 or 4096 allowed." % len(data))
|
|
|
|
if Options.FORCE_1K:
|
|
data_size = 1024
|
|
|
|
# read all sectors
|
|
sector_number = 0
|
|
start = 0
|
|
end = 64
|
|
while True:
|
|
sector = data[start:end]
|
|
sector = codecs.encode(sector, 'hex')
|
|
if not isinstance(sector, str):
|
|
sector = str(sector, 'ascii')
|
|
sectors = [sector[x:x + 32] for x in range(0, len(sector), 32)]
|
|
|
|
blocksmatrix.append(sectors)
|
|
|
|
# after 32 sectors each sector has 16 blocks instead of 4
|
|
sector_number += 1
|
|
if sector_number < 32:
|
|
start += 64
|
|
end += 64
|
|
elif sector_number == 32:
|
|
start += 64
|
|
end += 256
|
|
else:
|
|
start += 256
|
|
end += 256
|
|
|
|
if start == data_size:
|
|
break
|
|
|
|
blocksmatrix_clear = copy.deepcopy(blocksmatrix)
|
|
|
|
# add colors for each keyA, access bits, KeyB
|
|
for c in range(0, len(blocksmatrix)):
|
|
sector_size = len(blocksmatrix[c]) - 1
|
|
|
|
# Fill in the access bits
|
|
blockrights[c] = accbit_info(BitArray('0x' + blocksmatrix[c][sector_size][12:20]), sector_size)
|
|
|
|
# Prepare colored output of the sector trailor
|
|
keyA = bashcolors.RED + blocksmatrix[c][sector_size][0:12] + bashcolors.ENDC
|
|
accbits = bashcolors.GREEN + blocksmatrix[c][sector_size][12:20] + bashcolors.ENDC
|
|
keyB = bashcolors.BLUE + blocksmatrix[c][sector_size][20:32] + bashcolors.ENDC
|
|
|
|
blocksmatrix[c][sector_size] = keyA + accbits + keyB
|
|
|
|
print("File size: %d bytes. Expected %d sectors" % (len(data), sector_number))
|
|
print("\n\tUID: " + blocksmatrix[0][0][0:8])
|
|
print("\tBCC: " + blocksmatrix[0][0][8:10])
|
|
print("\tSAK: " + blocksmatrix[0][0][10:12])
|
|
print("\tATQA: " + blocksmatrix[0][0][12:14])
|
|
print(" %sKey A%s %sAccess Bits%s %sKey B%s" % (
|
|
bashcolors.RED, bashcolors.ENDC, bashcolors.GREEN, bashcolors.ENDC, bashcolors.BLUE, bashcolors.ENDC))
|
|
print("╔═════════╦═══════╦══════════════════════════════════╦════════╦═════════════════════════════════════╗")
|
|
print("║ Sector ║ Block ║ Data ║ Access ║ A | Acc. | B ║")
|
|
print("║ ║ ║ ║ ║ r w | r w | r w [info] ║")
|
|
print("║ ║ ║ ║ ║ r | w | i | d/t/r ║")
|
|
|
|
for q in range(0, len(blocksmatrix)):
|
|
print("╠═════════╬═══════╬══════════════════════════════════╬════════╬═════════════════════════════════════╣")
|
|
n_blocks = len(blocksmatrix[q])
|
|
|
|
# z is the block in each sector
|
|
for z in range(0, len(blocksmatrix[q])):
|
|
|
|
# Format the access bits. Print ERR in case of an error
|
|
if isinstance(blockrights[q][z], BitArray):
|
|
accbits = bashcolors.GREEN + blockrights[q][z].bin + bashcolors.ENDC
|
|
else:
|
|
accbits = bashcolors.WARNING + "ERR" + bashcolors.ENDC
|
|
|
|
if q == 0 and z == 0:
|
|
permissions = "-"
|
|
|
|
elif z == n_blocks - 1:
|
|
permissions = accbits_to_permission_sector(blockrights[q][z])
|
|
else:
|
|
permissions = accbits_to_permission_data(blockrights[q][z])
|
|
|
|
# Print the sector number in the second third row
|
|
if z == 2:
|
|
qn = q
|
|
else:
|
|
qn = ""
|
|
|
|
print("║ %-5s║ %-3d ║ %s ║ %s ║ %-35s ║ %s" % (qn, block_number, blocksmatrix[q][z],
|
|
accbits, permissions,
|
|
decode(blocksmatrix_clear[q][z])))
|
|
|
|
block_number += 1
|
|
|
|
print("╚═════════╩═══════╩══════════════════════════════════╩════════╩═════════════════════════════════════╝")
|
|
|
|
|
|
def main(args):
|
|
if args[0] == '-n':
|
|
args.pop(0)
|
|
bashcolors.BLUE = ""
|
|
bashcolors.RED = ""
|
|
bashcolors.GREEN = ""
|
|
bashcolors.WARNING = ""
|
|
bashcolors.ENDC = ""
|
|
|
|
if args[0] == '-1':
|
|
args.pop(0)
|
|
Options.FORCE_1K = True
|
|
|
|
filename = args[0]
|
|
with open(filename, "rb") as f:
|
|
data = f.read()
|
|
print_info(data)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main(sys.argv[1:])
|