mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
ff1ccd85e8
dropbear may be configured and compiled with support for different host key types Signed-off-by: Konstantin Demin <rockdrilla@gmail.com>
62 lines
992 B
Bash
Executable File
62 lines
992 B
Bash
Executable File
#!/bin/sh
|
|
|
|
_dropbear()
|
|
{
|
|
/usr/sbin/dropbear "$@" </dev/null >/dev/null 2>&1
|
|
}
|
|
|
|
_dropbearkey()
|
|
{
|
|
/usr/bin/dropbearkey "$@" </dev/null >/dev/null 2>&1
|
|
}
|
|
|
|
_ensurekey()
|
|
{
|
|
_dropbearkey -y -f "$1" && return
|
|
rm -f "$1"
|
|
_dropbearkey -f "$@" || {
|
|
rm -f "$1"
|
|
return 1
|
|
}
|
|
}
|
|
|
|
ktype_all='ed25519 ecdsa rsa'
|
|
|
|
failsafe_dropbear () {
|
|
local kargs kcount ktype tkey
|
|
|
|
kargs=
|
|
kcount=0
|
|
for ktype in ${ktype_all} ; do
|
|
tkey="/tmp/dropbear_failsafe_${ktype}_host_key"
|
|
|
|
case "${ktype}" in
|
|
ed25519) _ensurekey "${tkey}" -t ed25519 ;;
|
|
ecdsa) _ensurekey "${tkey}" -t ecdsa -s 256 ;;
|
|
rsa) _ensurekey "${tkey}" -t rsa -s 1024 ;;
|
|
*)
|
|
echo "unknown key type: ${ktype}" >&2
|
|
continue
|
|
;;
|
|
esac
|
|
|
|
[ -s "${tkey}" ] || {
|
|
rm -f "${tkey}"
|
|
continue
|
|
}
|
|
|
|
chmod 0400 "${tkey}"
|
|
kargs="${kargs}${kargs:+ }-r ${tkey}"
|
|
kcount=$((kcount+1))
|
|
done
|
|
|
|
[ "${kcount}" != 0 ] || {
|
|
echo 'DROPBEAR IS BROKEN' >&2
|
|
return 1
|
|
}
|
|
|
|
_dropbear ${kargs}
|
|
}
|
|
|
|
boot_hook_add failsafe failsafe_dropbear
|