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-rwxr-xr-x[-rw-r--r--]bin/ykfde51
1 files changed, 18 insertions, 33 deletions
diff --git a/bin/ykfde b/bin/ykfde
index 3901f2e..41f2718 100644..100755
--- a/bin/ykfde
+++ b/bin/ykfde
@@ -8,15 +8,13 @@ function help() {
echo " -2 use Yubico key slot 2 (default)"
echo " -d DEVICE add key to device DEVICE"
echo " -h show this help"
- echo " -k keep challenge, just add a new slot"
}
TMPDIR="$(mktemp --directory --tmpdir=/tmp/ .$(basename ${0})-${$}-XXXXXX)"
-PASS=""
SLOT="2"
-KEEP="0"
+SERIAL="$(ykinfo -sq)"
-while getopts "12d:hk" opt; do
+while getopts "12d:h" opt; do
case ${opt} in
1)
SLOT="1"
@@ -31,12 +29,10 @@ while getopts "12d:hk" opt; do
help
exit 0
;;
- k)
- KEEP="1"
- ;;
esac
done
+# check we have all information
if [ -z "${DEVICE}" ]; then
echo "No device given." >&2
help
@@ -45,48 +41,37 @@ elif [ ! -b "${DEVICE}" ]; then
echo "Device '${DEVICE}' does not exist or is not a block device." >&2
exit 1
elif ! cryptsetup isLuks "${DEVICE}" 2>/dev/null; then
- echo "Device '${DEVICE}' does not exist." >&2
+ echo "Device '${DEVICE}' is not a LUKS device." >&2
+ exit 1
+elif [ -z "${SERIAL}" ]; then
+ echo "Did not get a serial number from key." >&2
exit 1
fi
-if [ "${YKFDE_SLOT}" != "${SLOT}" ]; then
- echo "Please update /etc/ykfde.conf to match your slot!"
-fi
-
-echo "Please give extra password if you want to activate two factor"
-echo -n "authentication, just ENTER for none: "
-stty -echo
-read PASS
-stty echo
-echo
-
-if [ -n "${PASS}" ]; then
- echo "Do not forget to add 'ykfde_twofactor=y' to your boot parameters!"
+# This directroy should exist, but we create it in case it does not
+if [ ! -d "/etc/ykfde.d/" ]; then
+ install -d -m 0700 "/etc/ykfde.d/"
fi
-# generate challenge
-if [ "${KEEP}" = "1" ] && [ -s "/etc/ykfde-challenge" ]; then
- echo "User requested to keep challenge, not generating a new one."
- ln -s "/etc/ykfde-challenge" "${TMPDIR}/ykfde-challenge"
-else
- makepasswd --chars=$((64-${#PASS})) | tr -d '\n' > "${TMPDIR}/ykfde-challenge"
+# generate the challenge
+if ! makepasswd --chars=64 | tr -d '\n' > "/etc/ykfde.d/challenge-${SERIAL}"; then
+ exit 1
fi
-# generate response and add key to LUKS device
-if ! ykchalresp -${SLOT} "${PASS}$(cat ${TMPDIR}/ykfde-challenge)" | tr -d '\n' > "${TMPDIR}/ykfde-response"; then
+# generate response
+if ! ykchalresp -${SLOT} "$(cat "/etc/ykfde.d/challenge-${SERIAL}")" | tr -d '\n' > "${TMPDIR}/ykfde-response"; then
# ykchalresp should have shouted, so do not complain here
exit 1
fi
+
+# add key to LUKS device
if ! cryptsetup luksAddKey "${DEVICE}" "${TMPDIR}/ykfde-response"; then
# cryptsetup should have shouted, ...
exit 1
fi
-# shred response and install challenge
+# shred response and remove temporary directory
shred --remove "${TMPDIR}/ykfde-response"
-if [ "${KEEP}" != "1" ] && [ -s "${TMPDIR}/ykfde-challenge" ] && [ ! -L "${TMPDIR}/ykfde-challenge" ]; then
- install -D -m 0400 "${TMPDIR}/ykfde-challenge" "/etc/ykfde-challenge"
-fi
rm -rf "${TMPDIR}"
echo "Please do not forget to remove old keys when changing challenge!"