A Proxmark3 pyscripts python script that dumps bambu rfid tags in one go.

dump_bambu.py

#!/usr/bin/env python3
import time
import json
from hkdf import Hkdf
import hashlib
import pm3
from datetime import datetime
import struct

try:
    from colors import color
except ModuleNotFoundError:
    def color(s, fg=None):
        _ = fg
        return str(s)
        
        
def hex_to_little_endian(hex_value):
    hex_array = [hex_value[i:i+2] for i in range(0, len(hex_value), 2)]
    flipped_hex = ''.join(hex_array[::-1])
    return int(flipped_hex, 16)

def decode_text(hex_string):
    byte_array = bytes.fromhex(hex_string)
    return byte_array.decode("utf-8", errors="ignore").strip("\x00")

def build_spool_data(file_path):
    with open(file_path, "r") as file:
        data = json.load(file)

    blocks = data.get("blocks", {})
    serial = blocks["9"]
    filament_type = decode_text(blocks["4"][:32])
    red = int(blocks["5"][0:2], 16)
    green = int(blocks["5"][2:4], 16)
    blue = int(blocks["5"][4:6], 16)
    alpha = int(blocks["5"][6:8], 16)
    spool_color = f"R:{red}, G:{green}, B:{blue}, A:{alpha}"
    fg_color = red, green, blue
    prod_timedate = decode_text(blocks["12"][:32])
    struct_time = time.strptime(prod_timedate, "%Y_%m_%d_%H_%M")
    production_date = time.strftime("%B %d, %Y %H:%M", struct_time)
    return serial, filament_type, production_date, spool_color, fg_color

def invert_color(rgb):
    return tuple(255 - component for component in rgb)

def generate_keys(uid):
    hkdf = Hkdf(salt=bytes.fromhex("9A759CF2C4F7CAFF222CB9769B41BC96"), input_key_material=uid, hash=hashlib.sha256)
    num_keys = 2 * 7 + 2
    derived = hkdf.expand(length=6 * num_keys, info=b"RFID-A\0")
    keys = [derived[i:i+6].hex().upper() for i in range(0, len(derived), 6)]
    return [[keys[i], keys[i+1]] for i in range(0, len(keys), 2)]

def dump():
    def show(s='', prompt=f"[{color('=', fg='yellow')}] ", **kwargs):
        s = f"{prompt}" + f"\n{prompt}".join(s.split('\n'))
        print(s, **kwargs)
        

    start_time = time.time()
    p = pm3.pm3()
    p.console("hf 14a read")
    uid = None
    for line in p.grabbed_output.split('\n'):
        if "UID:" in line:
            uid = int(line[10:].replace(' ', '')[-8:], 16)
    
    if uid is None:
        show("Card not found")
        return False
    show(f"UID: {color(f'{uid:08X}', fg='green')}")
    found_keys = generate_keys(uid.to_bytes(4, 'big'))
    
    dic_path = f"client/dictionaries/{uid:08X}.dic"
    with open(dic_path, "w") as f:
        for pair in found_keys:
            for key in pair:
                f.write(f"{key}\n")
    show(f"Dictionary written to {color(dic_path, fg='cyan')}")

    p.console("prefs show --json")
    raw = p.grabbed_output.strip()
    prefs = json.loads(raw)
    dump_path = prefs.get("file.default.dumppath", ".")
    show("Dumping keys")
    p.console(f"hf mf fchk --1k -f {uid:08X} --dump")
    show(f"Keyfile written to {color(f'{dump_path}/hf-mf-{uid:08X}-key.bin', fg='cyan')}")
    keyfile = f"hf-mf-{uid:08X}-key.bin"
    show("Dumping Spool Data")
    p.console(f"hf mf dump -k {keyfile}")
    show(f"hf-mf-{uid:08X}-dump.bin & hf-mf-{uid:08X}-dump.json written to {color(dump_path, fg='cyan')}")
    elapsed = time.time() - start_time
    minutes = int(elapsed // 60)
    seconds = int(elapsed % 60)
    show(f"---- DONE: {minutes:2} minutes {seconds:2} seconds ----")
    spool_dump = f"{dump_path}/hf-mf-{uid:08X}-dump.json"
    serial, filament_type, production_date, spool_color, fg_color = build_spool_data(spool_dump)
    show(f"Serial Number: {color(serial, fg='green')}")
    show(f"Filament Type: {color(filament_type, fg='green')}")
    show(f"Color: {color(spool_color, fg=invert_color(fg_color), bg=fg_color)}")
    show(f"Production Date: {color(production_date, fg='green')}")

def main():
    dump()

if __name__ == '__main__':
    main()