Carputer-cracker/README.md

Card-Crack

A manual-trigger hardware/network recon toolkit for the M5Stack Cardputer (ESP32-S3), built for home-lab pentesting of devices you own — your router, a car's OBD/USB port, a PC, smart appliances.

⚠️ Authorized use only. Every tool here is scoped for your own bench: single targets you enter by hand, curated default-credential lists (not brute-force), rate-limited network checks, and read-only descriptor/ID reads. Nothing scans, transmits, or replays on its own — you press the action key. Don't point it at anything you don't own or run.

Modules

Module	What it does
Pin Scan	JTAGulator-style detection of UART / JTAG / SWD pins on the probe header. UART baud estimation; JTAG & SWD IDCODE reads.
V-Sense	Live target-voltage probe through a divider; guesses the logic family so you know what you're touching before driving a pin.
UART Sniff	Passive UART capture (hex+ascii, selectable baud); freeze a frame and replay it on a keypress (manual TX only).
USB Enum	ESP32-S3 as USB host — reads descriptors (VID/PID, class, strings, config) to fingerprint an unknown device. Read-only.
DefCred	Checks a single host (default: gateway) against a short list of factory-default logins over HTTP Basic Auth. Stops on first hit.
Bus Dump	Reads SPI-NOR (25-series) and I2C EEPROM (24-series) chips on your own boards to /dump/*.bin on microSD. Read-only.
Crypto Lab	Offline analysis of a dumped blob: Shannon entropy, magic-byte file-ID, single-byte XOR brute, AES-128-ECB known-key decrypt.
Exfil	Browse the SD card and stream a dump to the host over USB serial as base64 (base64 -d); writes a manifest of what you pulled.
Theme	Live UI theme switcher — 5 palettes, saved to NVS, restyles everything instantly.
CAN Bus	OBD/automotive CAN frame sniffer — listen on MCP2515 over SPI, log frames to SD, cycle bus speeds.
UART+	Enhanced UART with parallel auto-baudrate detection, session logging to binary, protocol hints.
Protocol	Unified UART/SPI/I2C sniffer — real-time stats (packets/sec, data rate, frame errors).
MemSearch	Post-dump binary analysis — find strings, magic bytes, hardcoded IPs, entropy spikes in captured blobs.
Logger	Persistent session logging — auto-log to JSON with metadata (voltage, pins, targets, timestamps). Export logs.
Injector	Manual credential/command injection — AT commands, OBD-II queries, Telnet login attempts. Capture responses.
Scope	Simple ASCII oscilloscope — sample GPIO at ~100kHz, display waveform, spot edges and DC bias.
Wizard	Two-wire protocol auto-detect — sniff I2C/SWD on pin pairs, register read/write on found slave.
Settings	Persist configuration (scan delay, voltage thresholds, timeouts, baud list) to NVS. JSON export/import.

18 modules total

Discover: Pin Scan, V-Sense, USB Enum, CAN Bus, Wizard
Sniff & Replay: UART Sniff, UART+, Protocol, Scope
Dump & Export: Bus Dump, Logger, Exfil
Analyse: Crypto Lab, MemSearch
Inject & Test: Injector, DefCred
System: Theme, Settings

Look & feel

Boot splash with a sweeping-glow logo, CRT scanlines, a breathing menu cursor, wipe-in transitions, spinners and progress bars. Switch palettes any time in the Theme module.

Build & flash

Requires PlatformIO.

# set your lab Wi-Fi for the DefCred module (or edit defcred.cpp)
pio run -e cardputer \
  -a "--build-property build.flags=-DCC_WIFI_SSID='\"MyAP\"' -DCC_WIFI_PASS='\"secret\"'"
pio run -e cardputer -t upload
pio device monitor

Controls

• Menu: ; up · . down · Enter open
• In a module: ` (backtick) back · per-module hints on the bottom bar

Layout

src/core/     shell, module interface, UI helpers, pin map
src/modules/  one file per recon tool
docs/         HARDWARE.md wiring + safety

See docs/HARDWARE.md before wiring — the S3 is a 3V3 part and 5V on a bare GPIO will destroy it.