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dropbear: drop run time detection of read-only rootfs

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Previously, when dropbear was started via its init script, relocation
of DROPBEAR_RSAKEY_DIR to support read-only rootfs was handled at
run time from within the init script.

Update the init script to take advantage of the read-only rootfs
config setup by read_only_rootfs_hook() and therefore be consistent
with startup under systemd (where relocation of DROPBEAR_RSAKEY_DIR
is handled by the read_only_rootfs_hook() at build time).

(From OE-Core rev: 4990f87b2f6a8b30c8d1c767636e7f5527f595ba)

(From OE-Core rev: b1f3fac327da43ccc079a03d3554f1365b298608)

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Andre McCurdy
2018-05-30 17:16:47 -07:00
committed by Richard Purdie
parent 92c5eeaff9
commit 9f3445c9e5
2 changed files with 9 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
meta/classes/rootfs-postcommands.bbclass
View File

@@ -112,14 +112,11 @@ read_only_rootfs_hook () {
# Also tweak the key location for dropbear in the same way.
if [ -d ${IMAGE_ROOTFS}/etc/dropbear ]; then
if [ -e ${IMAGE_ROOTFS}/etc/dropbear/dropbear_rsa_host_key ]; then
echo "DROPBEAR_RSAKEY_DIR=/etc/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
else
if [ ! -e ${IMAGE_ROOTFS}/etc/dropbear/dropbear_rsa_host_key ]; then
echo "DROPBEAR_RSAKEY_DIR=/var/lib/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
fi
fi
if ${@bb.utils.contains("DISTRO_FEATURES", "sysvinit", "true", "false", d)}; then
# Change the value of ROOTFS_READ_ONLY in /etc/default/rcS to yes
if [ -e ${IMAGE_ROOTFS}/etc/default/rcS ]; then

26
meta/recipes-core/dropbear/dropbear/init
View File

@@ -17,8 +17,11 @@ NAME=dropbear
DESC="Dropbear SSH server"
PIDFILE=/var/run/dropbear.pid
# These values may be replaced by those from /etc/default/dropbear
DROPBEAR_RSAKEY_DIR="/etc/dropbear"
DROPBEAR_PORT=22
DROPBEAR_EXTRA_ARGS=
DROPBEAR_RSAKEY_ARGS=
NO_START=0
set -e
@@ -28,32 +31,19 @@ test "$NO_START" = "0" || exit 0
test -x "$DAEMON" || exit 0
test ! -h /var/service/dropbear || exit 0
readonly_rootfs=0
for flag in `awk '{ if ($2 == "/") { split($4,FLAGS,",") } }; END { for (f in FLAGS) print FLAGS[f] }' </proc/mounts`; do
case $flag in
ro)
readonly_rootfs=1
;;
esac
done
if [ $readonly_rootfs = "1" ]; then
mkdir -p /var/lib/dropbear
DROPBEAR_RSAKEY_DEFAULT="/var/lib/dropbear/dropbear_rsa_host_key"
else
DROPBEAR_RSAKEY_DEFAULT="/etc/dropbear/dropbear_rsa_host_key"
fi
test -z "$DROPBEAR_BANNER" || \
DROPBEAR_EXTRA_ARGS="$DROPBEAR_EXTRA_ARGS -b $DROPBEAR_BANNER"
test -n "$DROPBEAR_RSAKEY" || \
DROPBEAR_RSAKEY=$DROPBEAR_RSAKEY_DEFAULT
DROPBEAR_RSAKEY="${DROPBEAR_RSAKEY_DIR}/dropbear_rsa_host_key"
gen_keys() {
if [ -f "$DROPBEAR_RSAKEY" -a ! -s "$DROPBEAR_RSAKEY" ]; then
rm $DROPBEAR_RSAKEY || true
fi
test -f $DROPBEAR_RSAKEY || dropbearkey -t rsa -f $DROPBEAR_RSAKEY $DROPBEAR_RSAKEY_ARGS
if [ ! -f "$DROPBEAR_RSAKEY" ]; then
mkdir -p ${DROPBEAR_RSAKEY%/*}
dropbearkey -t rsa -f $DROPBEAR_RSAKEY $DROPBEAR_RSAKEY_ARGS
fi
}
case "$1" in