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https://github.com/RfidResearchGroup/proxmark3.git
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move client scripts to tools
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Philippe Teuwen
parent
3245260c00
commit
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263
tools/pm3_mfdread.py
Executable file
263
tools/pm3_mfdread.py
Executable file
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# mfdread.py - Mifare dumps parser in human readable format
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# Pavel Zhovner <pavel@zhovner.com>
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# https://github.com/zhovner/mfdread
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#
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#Dependencies:
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# easy_install bitstring
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#or
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# pip install bitstring
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#Usage:
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# pm3_mfdread.py ./dump.mfd
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#
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import codecs
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import copy
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import sys
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from collections import defaultdict
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from bitstring import BitArray
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class Options:
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FORCE_1K = False
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if len(sys.argv) == 1:
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sys.exit('''
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------------------
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Usage: mfdread.py ./dump.mfd
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Mifare dumps reader.
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''')
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def decode(bytes):
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decoded = codecs.decode(bytes, "hex")
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try:
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return str(decoded, "utf-8").rstrip(b'\0')
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except:
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return ""
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class bashcolors:
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BLUE = '\033[34m'
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RED = '\033[91m'
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GREEN = '\033[32m'
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WARNING = '\033[93m'
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ENDC = '\033[0m'
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def accbits_for_blocknum(accbits_str, blocknum):
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'''
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Decodes the access bit string for block "blocknum".
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Returns the three access bits for the block or False if the
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inverted bits do not match the access bits.
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'''
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bits = BitArray([0])
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inverted = BitArray([0])
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# Block 0 access bits
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if blocknum == 0:
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bits = BitArray([accbits_str[11], accbits_str[23], accbits_str[19]])
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inverted = BitArray([accbits_str[7], accbits_str[3], accbits_str[15]])
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# Block 0 access bits
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elif blocknum == 1:
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bits = BitArray([accbits_str[10], accbits_str[22], accbits_str[18]])
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inverted = BitArray([accbits_str[6], accbits_str[2], accbits_str[14]])
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# Block 0 access bits
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elif blocknum == 2:
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bits = BitArray([accbits_str[9], accbits_str[21], accbits_str[17]])
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inverted = BitArray([accbits_str[5], accbits_str[1], accbits_str[13]])
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# Sector trailer / Block 3 access bits
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elif blocknum in (3, 15):
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bits = BitArray([accbits_str[8], accbits_str[20], accbits_str[16]])
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inverted = BitArray([accbits_str[4], accbits_str[0], accbits_str[12]])
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# Check the decoded bits
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inverted.invert()
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if bits.bin == inverted.bin:
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return bits
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else:
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return False
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def accbits_to_permission_sector(accbits):
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permissions = {
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'000': "- A | A - | A A [read B]",
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'010': "- - | A - | A - [read B]",
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'100': "- B | A/B - | - B",
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'110': "- - | A/B - | - -",
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'001': "- A | A A | A A [transport]",
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'011': "- B | A/B B | - B",
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'101': "- - | A/B B | - -",
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'111': "- - | A/B - | - -",
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}
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if isinstance(accbits, BitArray):
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return permissions.get(accbits.bin, "unknown")
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else:
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return ""
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def accbits_to_permission_data(accbits):
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permissions = {
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'000': "A/B | A/B | A/B | A/B [transport]",
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'010': "A/B | - | - | - [r/w]",
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'100': "A/B | B | - | - [r/w]",
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'110': "A/B | B | B | A/B [value]",
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'001': "A/B | - | - | A/B [value]",
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'011': " B | B | - | - [r/w]",
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'101': " B | - | - | - [r/w]",
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'111': " - | - | - | - [r/w]",
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}
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if isinstance(accbits, BitArray):
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return permissions.get(accbits.bin, "unknown")
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else:
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return ""
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def accbit_info(accbits, sector_size):
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'''
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Returns a dictionary of a access bits for all three blocks in a sector.
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If the access bits for block could not be decoded properly, the value is set to False.
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'''
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access_bits = defaultdict(lambda: False)
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if sector_size == 15:
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access_bits[sector_size] = accbits_for_blocknum(accbits, sector_size)
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return access_bits
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# Decode access bits for all 4 blocks of the sector
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for i in range(0, 4):
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access_bits[i] = accbits_for_blocknum(accbits, i)
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return access_bits
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def print_info(data):
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blocksmatrix = []
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blockrights = {}
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block_number = 0
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data_size = len(data)
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if data_size not in {4096, 1024}:
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sys.exit("Wrong file size: %d bytes.\nOnly 1024 or 4096 allowed." % len(data))
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if Options.FORCE_1K:
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data_size = 1024
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# read all sectors
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sector_number = 0
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start = 0
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end = 64
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while True:
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sector = data[start:end]
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sector = codecs.encode(sector, 'hex')
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if not isinstance(sector, str):
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sector = str(sector, 'ascii')
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sectors = [sector[x:x + 32] for x in range(0, len(sector), 32)]
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blocksmatrix.append(sectors)
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# after 32 sectors each sector has 16 blocks instead of 4
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sector_number += 1
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if sector_number < 32:
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start += 64
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end += 64
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elif sector_number == 32:
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start += 64
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end += 256
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else:
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start += 256
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end += 256
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if start == data_size:
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break
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blocksmatrix_clear = copy.deepcopy(blocksmatrix)
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# add colors for each keyA, access bits, KeyB
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for c in range(0, len(blocksmatrix)):
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sector_size = len(blocksmatrix[c]) - 1
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# Fill in the access bits
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blockrights[c] = accbit_info(BitArray('0x' + blocksmatrix[c][sector_size][12:20]), sector_size)
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# Prepare colored output of the sector trailor
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keyA = bashcolors.RED + blocksmatrix[c][sector_size][0:12] + bashcolors.ENDC
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accbits = bashcolors.GREEN + blocksmatrix[c][sector_size][12:20] + bashcolors.ENDC
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keyB = bashcolors.BLUE + blocksmatrix[c][sector_size][20:32] + bashcolors.ENDC
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blocksmatrix[c][sector_size] = keyA + accbits + keyB
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print("File size: %d bytes. Expected %d sectors" % (len(data), sector_number))
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print("\n\tUID: " + blocksmatrix[0][0][0:8])
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print("\tBCC: " + blocksmatrix[0][0][8:10])
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print("\tSAK: " + blocksmatrix[0][0][10:12])
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print("\tATQA: " + blocksmatrix[0][0][12:14])
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print(" %sKey A%s %sAccess Bits%s %sKey B%s" % (
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bashcolors.RED, bashcolors.ENDC, bashcolors.GREEN, bashcolors.ENDC, bashcolors.BLUE, bashcolors.ENDC))
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print("╔═════════╦═══════╦══════════════════════════════════╦════════╦═════════════════════════════════════╗")
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print("║ Sector ║ Block ║ Data ║ Access ║ A | Acc. | B ║")
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print("║ ║ ║ ║ ║ r w | r w | r w [info] ║")
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print("║ ║ ║ ║ ║ r | w | i | d/t/r ║")
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for q in range(0, len(blocksmatrix)):
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print("╠═════════╬═══════╬══════════════════════════════════╬════════╬═════════════════════════════════════╣")
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n_blocks = len(blocksmatrix[q])
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# z is the block in each sector
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for z in range(0, len(blocksmatrix[q])):
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# Format the access bits. Print ERR in case of an error
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if isinstance(blockrights[q][z], BitArray):
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accbits = bashcolors.GREEN + blockrights[q][z].bin + bashcolors.ENDC
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else:
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accbits = bashcolors.WARNING + "ERR" + bashcolors.ENDC
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if q == 0 and z == 0:
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permissions = "-"
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elif z == n_blocks - 1:
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permissions = accbits_to_permission_sector(blockrights[q][z])
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else:
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permissions = accbits_to_permission_data(blockrights[q][z])
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# Print the sector number in the second third row
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if z == 2:
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qn = q
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else:
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qn = ""
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print("║ %-5s║ %-3d ║ %s ║ %s ║ %-35s ║ %s" % (qn, block_number, blocksmatrix[q][z],
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accbits, permissions,
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decode(blocksmatrix_clear[q][z])))
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block_number += 1
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print("╚═════════╩═══════╩══════════════════════════════════╩════════╩═════════════════════════════════════╝")
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def main(args):
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if args[0] == '-n':
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args.pop(0)
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bashcolors.BLUE = ""
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bashcolors.RED = ""
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bashcolors.GREEN = ""
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bashcolors.WARNING = ""
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bashcolors.ENDC = ""
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if args[0] == '-1':
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args.pop(0)
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Options.FORCE_1K = True
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filename = args[0]
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with open(filename, "rb") as f:
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data = f.read()
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print_info(data)
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if __name__ == "__main__":
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main(sys.argv[1:])
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