Drop-in replacement for MITRE's uvx ectf tools host tools, rewritten in Rust with reliable serial I/O. Uses raw termios instead of pyserial to avoid macOS CDC-ACM data corruption bugs.

Usage

cargo build --release

# List files on the HSM
./target/release/ectf-tools /dev/tty.usbmodemXXX list 1a2b3c

# Write a file
./target/release/ectf-tools /dev/tty.usbmodemXXX write 1a2b3c 0 0x4321 myfile.bin

# Read a file
./target/release/ectf-tools /dev/tty.usbmodemXXX read 1a2b3c 1 ./output/

# Interrogate a connected HSM
./target/release/ectf-tools /dev/tty.usbmodemXXX interrogate 1a2b3c

# Listen for another HSM
./target/release/ectf-tools /dev/tty.usbmodemXXX listen

# Receive a file from another HSM
./target/release/ectf-tools /dev/tty.usbmodemXXX receive 1a2b3c 0 1

Verbosity

-v — protocol-level debug (headers, ACKs, chunk sizes)
-vv — raw byte-level trace with xxd-style hexdump

Why not pyserial?

pyserial has known data corruption issues on macOS with CDC-ACM devices (like the MAX78000). This tool opens the serial port directly with proper termios configuration, flushes the input buffer on open, and uses O_NONBLOCK to avoid blocking on carrier detect.