From 92d08ce6a8a58e0b572c66c61d18be3304c6ce97 Mon Sep 17 00:00:00 2001
From: Mathy <mathy.vanhoef@nyu.edu>
Date: Sat, 7 Mar 2020 21:10:55 -0500
Subject: [PATCH] fragattack: script to turn hardware encryption on or off

---
 research/hwcrypto.sh | 52 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100755 research/hwcrypto.sh

diff --git a/research/hwcrypto.sh b/research/hwcrypto.sh
new file mode 100755
index 000000000..0a5b22422
--- /dev/null
+++ b/research/hwcrypto.sh
@@ -0,0 +1,52 @@
+#!/bin/bash
+
+# Copyright (c) 2020, Mathy Vanhoef <mathy.vanhoef@nyu.be>
+#
+# This code may be distributed under the terms of the BSD license.
+# See README for more details.
+
+set -e
+
+NOHWCRYPT="ath5k ath9k ath9k_htc rt2800usb carl9170 b43 p54common rt2500usb rt2800pci rt2800usb rt73usb"
+SWCRYPTO="iwlwifi iwl3945 iwl4965"
+HWCRYPTO="ipw2200"
+
+hwcrypt_remove_modules() {
+	# Remove loaded modules so they'll reload parameters
+	for MODULE in $NOHWCRYPT $SWCRYPTO $HWCRYPTO
+	do rmmod $MODULE 2> /dev/null || true; done
+}
+
+hwcrypt_off() {
+	# Create nohwcrypt.conf options file
+	rm /etc/modprobe.d/nohwcrypt.conf 2> /dev/null || true
+
+	for MODULE in $NOHWCRYPT
+	do echo "options $MODULE nohwcrypt=1" >> /etc/modprobe.d/nohwcrypt.conf; done
+
+	for MODULE in $SWCRYPTO
+	do echo "options $MODULE swcrypto=1" >> /etc/modprobe.d/nohwcrypt.conf; done
+
+	for MODULE in $HWCRYPTO
+	do echo "options $MODULE hwcrypto=0" >> /etc/modprobe.d/nohwcrypt.conf; done
+
+	# Done. To be sure parameters are reloaded, reboot computer.
+	hwcrypt_remove_modules
+	echo "Done. Reboot your computer."
+}
+
+hwcrypt_on() {
+	rm -f /etc/modprobe.d/nohwcrypt.conf
+	hwcrypt_remove_modules
+	echo "Done. Reboot your computer."
+}
+
+
+if [[ $1 == "on" ]]; then
+	hwcrypt_on
+elif [[ $1 == "off" ]]; then
+	hwcrypt_off
+else
+	echo "Usage: $0 on|off"
+fi
+