guidconvert

guidconvert.py

import struct
import argparse

def hex_string_to_guid(hex_string):
    # Convert the hex string to bytes
    guid_bytes = bytes.fromhex(hex_string)

    if len(guid_bytes) != 16:
        print("Invalid GUID hex string length")
        return None

    # Convert the bytes into the human readable format
    # Take note of which ints are little endian!
    first = struct.unpack("<I", guid_bytes[:4])[0]
    second = struct.unpack("<H", guid_bytes[4:6])[0]
    third = struct.unpack("<H", guid_bytes[6:8])[0]
    fourth = struct.unpack(">H", guid_bytes[8:10])[0]
    fifth = ''.join('{:02x}'.format(x) for x in guid_bytes[10:])

    # Adjust the format to include leading zeros where necessary
    guid_string = f'{first:08x}-{second:04x}-{third:04x}-{fourth:04x}-{fifth}'
    return guid_string

def main():
    parser = argparse.ArgumentParser(description="Convert a hex string to a GUID")
    parser.add_argument("hex_string", help="Hex string representing the GUID")
    args = parser.parse_args()

    guid = hex_string_to_guid(args.hex_string)
    if guid:
        print(guid)

if __name__ == "__main__":
    main()