1 files changed, 36 insertions, 0 deletions
diff --git a/hook/ykfde b/hook/ykfde
new file mode 100644
index 0000000..be75694
--- /dev/null
+++ b/hook/ykfde
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+run_hook() {
+	ykfde_slot="${ykfde_slot:-1}"
+	ykfde_count=0
+
+	if [ -s /ykfde-challenge ]; then
+		modprobe -a -q usbhid >/dev/null 2>&1
+
+		if [ "${ykfde_twofactor}" = "y" ]; then
+			echo -n "Please give two factor key for Yubikey: "
+			stty -echo
+			read TWOFACTOR
+			stty echo
+			echo
+		else
+			TWOFACTOR=""
+		fi
+
+		# Any chance to get this more efficient? Without polling and without long sleep times would be great.
+		while ! ykchalresp -${ykfde_slot} "${TWOFACTOR}$(cat /ykfde-challenge)" > /crypto_keyfile.bin 2>/dev/null; do
+			if [ $((ykfde_count++)) -gt 10 ]; then
+				msg ":: No Yubikey presend, fallback to interactive mode"
+				rm -f /ykfde-challenge
+				return 1
+			fi
+			sleep 0.3
+		done
+
+		msg ":: Created crypto keyfile using Yubikey, handing over to encrypt hook"
+		rm -f /ykfde-challenge
+	else
+		msg ":: No challenge found, falling back to interactive mode"
+		return 1
+	fi
+}