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Converters Paxton Switch2 and Net2 to EM4102

Signed-off-by: Jarek Barwinski <116510448+jareckib@users.noreply.github.com>

client/pyscripts/PAXTON_NET.py

@@ -0,0 +1,69 @@
+# Author - Jareckib
+# Based on Equipter's tutorial - Downgrade Paxton Net to EM410x
+import sys
+def hex_to_bin(hex_string):
+    return ''.join(format(byte, '08b') for byte in bytearray.fromhex(hex_string))
+def remove_last_two_bits(binary_str):
+    return binary_str[:-2]
+def split_into_5bit_chunks(binary_str):
+    return [binary_str[i:i+5] for i in range(0, len(binary_str), 5)]
+def remove_parity_bit(chunks):
+    return [chunk[1:] for chunk in chunks if len(chunk) == 5]
+def convert_to_hex(chunks):
+    return [format(int(chunk, 2), 'X') for chunk in chunks]
+def find_until_before_f(hex_values):
+    result = []
+    for value in hex_values:
+        if value == 'F':
+            break
+        result.append(value)
+    return result
+def process_block(block):
+    binary_str = hex_to_bin(block)
+    binary_str = remove_last_two_bits(binary_str)
+    chunks = split_into_5bit_chunks(binary_str)
+    no_parity_chunks = remove_parity_bit(chunks)
+    hex_values = convert_to_hex(no_parity_chunks)
+    return hex_values
+def calculate_id(blocks):
+    all_hex_values = []
+    for block in blocks:
+        hex_values = process_block(block)
+        all_hex_values.extend(hex_values)
+    selected_hex_values = find_until_before_f(all_hex_values)
+    if not selected_hex_values:
+        raise ValueError("Error: No valid data found in blocks 4 and 5.")
+    combined_hex = ''.join(selected_hex_values)
+    if not combined_hex.isdigit():
+        raise ValueError("Error: Invalid data in blocks 4 and 5.")
+    decimal_id = int(combined_hex)
+    stripped_hex_id = format(decimal_id, 'X').upper()
+    padded_hex_id = stripped_hex_id.zfill(10)
+    return combined_hex, decimal_id, stripped_hex_id, padded_hex_id
+def input_block_data(block_number):
+    while True:
+        block_data = input("Enter data for block {} (4 bytes in hex): ".format(block_number)).strip()
+        if len(block_data) != 8 or not all(c in '0123456789abcdefABCDEF' for c in block_data):
+            print("Error: Data must be 4 bytes (8 characters) in hex. Try again.")
+        else:
+            return block_data
+block_4 = input_block_data(4)
+block_5 = input_block_data(5)
+
+# Check if the second nibble of the second byte in block 5 is 'F'
+if block_5[3] != 'F' and block_5[3] != 'f':
+    print("This is not a Paxton Net2")
+    sys.exit()
+
+blocks = [
+    block_4,
+    block_5,
+]
+try:
+    result_hex, result_decimal, stripped_hex_id, padded_hex_id = calculate_id(blocks)
+    print('Calculations for block 4 and block 5:')
+    print('Result (Net2 ID - decimal): {}'.format(result_decimal))
+    print('Result (Net2 ID - hex): {}'.format(padded_hex_id))
+    print('Use the following command in Proxmark3: lf em 410x clone --id {}'.format(padded_hex_id))
+except ValueError as e:
+    print(e)