Magcard Write Read Utility Program __top__ -

def is_valid_track(self, track_num, data): if track_num == 1: return all(ch in TRACK1_CHARSET for ch in data) and len(data) <= TRACK_MAX_LEN[1] elif track_num == 2: return all(ch in TRACK2_CHARSET for ch in data) and len(data) <= TRACK_MAX_LEN[2] elif track_num == 3: return all(ch in TRACK3_CHARSET for ch in data) and len(data) <= TRACK_MAX_LEN[3] return False

#!/usr/bin/env python3 """ Magnetic Card Read/Write Utility (Simulated / Educational) Supports ISO 7811 tracks 1, 2, 3. """ import re import argparse TRACK1_CHARSET = set("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 .-+/$%*") TRACK2_CHARSET = set("0123456789:;<=>?") TRACK3_CHARSET = set("0123456789:;<=>?") magcard write read utility program

# Interactive mode card = MagCard() print("\n===== MagCard Utility (Simulated) =====") print("Commands: w(rite), r(ead), d(isplay), c(lear), q(uit)\n") while True: cmd = input("> ").strip().lower() if cmd == 'q': break elif cmd == 'w': interactive_write(card) elif cmd == 'r': interactive_read(card) elif cmd == 'd': display_card(card) elif cmd == 'c': card.clear() print("Card cleared.") else: print("Unknown command. Try w, r, d, c, q.") if == " main ": main() How to use it 1. Interactive mode Run the script with no arguments: Interactive mode Run the script with no arguments:

For real hardware (e.g., MagTek, ID Tech readers), you would replace the simulated I/O with serial/USB HID commands. ID Tech readers)

python magcard_util.py --write "2:1234567890" Read track 1:

def decode_track(encoded): """Extracts raw data and verifies LRC""" if len(encoded) < 4: return None # Expected format: S data E checksum start_sentinel = encoded[0] end_sentinel = encoded[-2] checksum = encoded[-1] data_part = encoded[1:-2]