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105 lines
4.6 KiB
Python
105 lines
4.6 KiB
Python
# paxton_convert.py - Convert Paxton Net2 and Switch2 to EM4102
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# Author jareckib <jareckib@hotmail.com>
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# Based on Equipter's tutorial - Downgrade Paxton Net to EM410x
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#
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# This code is copyright (c) jareckib, 2025, All rights reserved.
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# For non-commercial use only, the following terms apply - for all other
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# uses, please contact the author.
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#
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# This code is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# any later version.
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#
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# This code is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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import sys
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def hex_to_bin(hex_string):
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return ''.join(format(byte, '08b') for byte in bytearray.fromhex(hex_string))
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def remove_last_two_bits(binary_str):
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return binary_str[:-2]
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def split_into_5bit_chunks(binary_str):
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return [binary_str[i:i+5] for i in range(0, len(binary_str), 5)]
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def remove_parity_bit(chunks):
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return [chunk[1:] for chunk in chunks if len(chunk) == 5]
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def convert_to_hex(chunks):
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return [format(int(chunk, 2), 'X') for chunk in chunks]
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def convert_to_decimal(chunks):
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return [int(chunk, 2) for chunk in chunks]
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def find_until_before_f(hex_values):
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result = []
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for value in hex_values:
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if value == 'F':
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break
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result.append(value)
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return result
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def process_block(block):
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binary_str = hex_to_bin(block)
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binary_str = remove_last_two_bits(binary_str)
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chunks = split_into_5bit_chunks(binary_str)
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no_parity_chunks = remove_parity_bit(chunks)
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return no_parity_chunks
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def calculate_id_net(blocks):
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all_hex_values = []
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for block in blocks:
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hex_values = convert_to_hex(process_block(block))
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all_hex_values.extend(hex_values)
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selected_hex_values = find_until_before_f(all_hex_values)
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if not selected_hex_values:
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raise ValueError("Error: No valid data found in blocks 4 and 5.")
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combined_hex = ''.join(selected_hex_values)
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if not combined_hex.isdigit():
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raise ValueError("Error: Invalid data in blocks 4 and 5.")
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decimal_id = int(combined_hex)
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stripped_hex_id = format(decimal_id, 'X').upper()
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padded_hex_id = stripped_hex_id.zfill(10)
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return decimal_id, padded_hex_id
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def calculate_id_switch(blocks):
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all_decimal_values = []
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for block in blocks:
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decimal_values = convert_to_decimal(process_block(block))
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all_decimal_values.extend(decimal_values)
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if len(all_decimal_values) < 15:
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raise ValueError("Error: Not enough data after processing blocks 4, 5, 6, and 7.")
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id_positions = [9, 11, 13, 15, 2, 4, 6, 8]
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id_numbers = [all_decimal_values[pos-1] for pos in id_positions]
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decimal_id = int(''.join(map(str, id_numbers)))
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padded_hex_id = format(decimal_id, 'X').upper().zfill(10)
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return decimal_id, padded_hex_id
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def input_block_data(block_number):
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while True:
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block_data = input("Enter data for block {} (4 bytes in hex): ".format(block_number)).strip()
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if len(block_data) != 8 or not all(c in '0123456789abcdefABCDEF' for c in block_data):
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print("Error: Data must be 4 bytes (8 characters) in hex. Try again.")
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else:
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return block_data
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block_4 = input_block_data(4)
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block_5 = input_block_data(5)
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if block_5[3] == 'F' or block_5[3] == 'f':
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print("Identified Paxton Net2")
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blocks = [block_4, block_5]
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try:
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decimal_id, padded_hex_id = calculate_id_net(blocks)
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print('Calculations for block 4 and block 5:')
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print('Net2 ID - decimal: {}'.format(decimal_id))
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print('Net2 ID - hex: {}'.format(padded_hex_id))
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print('Use the following command in Proxmark3: lf em 410x clone --id {}'.format(padded_hex_id))
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except ValueError as e:
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print(e)
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else:
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print("Identified Paxton Switch2")
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block_6 = input_block_data(6)
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block_7 = input_block_data(7)
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blocks = [block_4, block_5, block_6, block_7]
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try:
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decimal_id, padded_hex_id = calculate_id_switch(blocks)
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print('Calculated data from blocks 4, 5, 6, 7:')
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print('Switch2 ID - decimal: {}'.format(decimal_id))
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print('Switch2 ID - hex: {}'.format(padded_hex_id))
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print('Use the following command in Proxmark3: lf em 410x clone --id {}'.format(padded_hex_id))
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except ValueError as e:
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print(e)
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print('If EM4102 does not work, this option is probably disabled. Sorry for the inconvenience.')
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