nullcon2023-chall-megavault

Atmega32u4-based vault keypad hardware challenge for NullCon 2023 Berlin
git clone https://git.sinitax.com/sinitax/nullcon2023-chall-megavault
Log | Files | Refs | sfeed.txt

comm.py (549B)

      1import serial
      2import sys
      3
      4def readcmd():
      5    while True:
      6        line = ser.readline().strip().decode()
      7        if len(line) > 0:
      8            print("<", line)
      9            if line[0] == '!':
     10                break
     11    return line
     12
     13def sendcmd(line):
     14    print(">", line)
     15    ser.write(line.encode() + b"\r")
     16
     17with serial.Serial(sys.argv[1], 9600, timeout=1) as ser:
     18    sendcmd("!INIT")
     19    assert(readcmd() == "!OK")
     20
     21    while True:
     22        line = readcmd()
     23        assert(line == "!FLAG")
     24        sendcmd("!OK")
     25        sendcmd("ENO{S4f3_Cr4cKd}")