github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-21 13:53:55 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

xorcheck script converted in python3 + test

Browse source
This commit is contained in:
Philippe Teuwen 2020-02-21 16:29:52 +01:00
commit aa6fc60a22
2 changed files with 18 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

37
tools/xorcheck.py
View file

@ -1,4 +1,4 @@
#!/usr/bin/env python
#!/usr/bin/env python3
# xorcheck.py - find xor values for 8-bit LRC
#
@ -24,22 +24,21 @@ import sys
import os
if(len(sys.argv) < 3):
print
print '\t'+sys.argv[0] + ' - Generate final byte for XOR LRC'
print
print 'Usage: ' + sys.argv[0] + ' <ID Byte1> <ID Byte2> ... <LRC>'
print
print '\tSpecifying the bytes of a UID with a known LRC will find the last byte value'
print '\tneeded to generate that LRC with a rolling XOR. All bytes should be specified in HEX.'
print
print 'Example:'
print
print '\txorcheck.py 04 00 80 64 ba'
print
print 'Should produce the output:'
print
print '\tTarget (BA) requires final LRC XOR byte value: 5A'
print
print("""
\t{0} - Generate final byte for XOR LRC
Usage: {0} <ID Byte1> <ID Byte2> ... <LRC>
\tSpecifying the bytes of a UID with a known LRC will find the last byte value
\tneeded to generate that LRC with a rolling XOR. All bytes should be specified in HEX.
Example:
\t{0} 04 00 80 64 ba
Should produce the output:
\tTarget (BA) requires final LRC XOR byte value: 5A\n""".format(sys.argv[0]))
os._exit(True)
target= int(sys.argv[len(sys.argv) - 1],16)
@ -47,6 +46,4 @@ target= int(sys.argv[len(sys.argv) - 1],16)
lrc= 0x00
for i in range(len(sys.argv) - 1):
lrc ^= int(sys.argv[i + 1],16)
print
print 'Target (%02X) requires final LRC XOR byte value: %02X' % (target,lrc)
print
print('\nTarget (%02X) requires final LRC XOR byte value: %02X\n' % (target,lrc))