# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2006 Carlos Sobrinho
-START=50
+START=19
STOP=50
USE_PROCD=1
EXTRA_COMMANDS="killclients"
EXTRA_HELP=" killclients Kill ${NAME} processes except servers and yourself"
+_dropbearkey()
+{
+ /usr/bin/dropbearkey "$@" 0<&- 1>&- 2>&-
+}
+
+# $1 - host key file name
+hk_verify()
+{
+ [ -f "$1" ] || return 1
+ [ -s "$1" ] || return 2
+ _dropbearkey -y -f "$1" || return 3
+ return 0
+}
+
+# $1 - hk_verify() return code
+hk_errmsg()
+{
+ case "$1" in
+ 0) ;;
+ 1) echo "file does not exist" ;;
+ 2) echo "file has zero length" ;;
+ 3) echo "file is not valid host key or not supported" ;;
+ *) echo "unknown error" ;;
+ esac
+}
+
+# $1 - config option
+# $2 - host key file name
+hk_config()
+{
+ local x m
+ hk_verify "$2"; x=$?
+ case "$x" in
+ 0) procd_append_param command -r "$2"
+ ;;
+ *) m=$(hk_errmsg "$x")
+ logger -t "${NAME}" -p daemon.warn \
+ "option '$1', value '$2': $m, skipping"
+ ;;
+ esac
+}
+
+# $1 - host key file name
+hk_config__keyfile()
+{
+ hk_config 'keyfile' "$1"
+}
+
+hk_generate_as_needed()
+{
+ local kdir kgen ktype tdir kcount tfile
+ kdir='/etc/dropbear'
+
+ kgen=''
+ for ktype in ecdsa rsa; do
+ hk_verify "${kdir}/dropbear_${ktype}_host_key" && continue
+
+ kgen="${kgen} ${ktype}"
+ done
+
+ [ -z "${kgen}" ] && return
+
+ tdir=$(mktemp -d); chmod 0700 "${tdir}"
+
+ kcount=0
+ for ktype in ${kgen}; do
+ tfile="${tdir}/dropbear_${ktype}_host_key"
+
+ if ! _dropbearkey -t ${ktype} -f "${tfile}"; then
+ # unsupported key type
+ rm -f "${tfile}"
+ continue
+ fi
+
+ kcount=$((kcount+1))
+ done
+
+ if [ ${kcount} -ne 0 ]; then
+ mkdir -p "${kdir}"; chmod 0700 "${kdir}"; chown root "${kdir}"
+ mv -f "${tdir}/"* "${kdir}/"
+ fi
+
+ rm -rf "${tdir}"
+}
+
append_ports()
{
local ipaddrs="$1"
validate_section_dropbear()
{
- uci_validate_section dropbear dropbear "${1}" \
+ uci_load_validate dropbear dropbear "$1" "$2" \
'PasswordAuth:bool:1' \
'enable:bool:1' \
'Interface:string' \
'RootPasswordAuth:bool:1' \
'RootLogin:bool:1' \
'rsakeyfile:file' \
+ 'keyfile:list(file)' \
'BannerFile:file' \
- 'Port:list(port):22' \
+ 'Port:port:22' \
'SSHKeepAlive:uinteger:300' \
'IdleTimeout:uinteger:0' \
+ 'MaxAuthTries:uinteger:3' \
+ 'RecvWindowSize:uinteger:0' \
'mdns:bool:1'
}
dropbear_instance()
{
- local PasswordAuth enable Interface GatewayPorts \
- RootPasswordAuth RootLogin rsakeyfile \
- BannerFile Port SSHKeepAlive IdleTimeout \
- mdns ipaddrs
+ local ipaddrs
- validate_section_dropbear "${1}" || {
+ [ "$2" = 0 ] || {
echo "validation failed"
return 1
}
[ -n "${Interface}" ] && {
+ [ -n "${BOOT}" ] && return 0
+
network_get_ipaddrs_all ipaddrs "${Interface}" || {
echo "interface ${Interface} has no physdev or physdev has no suitable ip"
return 1
[ "${GatewayPorts}" -eq 1 ] && procd_append_param command -a
[ "${RootPasswordAuth}" -eq 0 ] && procd_append_param command -g
[ "${RootLogin}" -eq 0 ] && procd_append_param command -w
- [ -n "${rsakeyfile}" ] && procd_append_param command -r "${rsakeyfile}"
+ if [ -n "${rsakeyfile}" ]; then
+ logger -t ${NAME} -p daemon.warn \
+ "option 'rsakeyfile' is considered to be deprecated and" \
+ "will be removed in future releases, use 'keyfile' instead"
+ hk_config 'rsakeyfile' "${rsakeyfile}"
+ fi
+ config_list_foreach "$1" "keyfile" hk_config__keyfile
[ -n "${BannerFile}" ] && procd_append_param command -b "${BannerFile}"
append_ports "${ipaddrs}" "${Port}"
[ "${IdleTimeout}" -ne 0 ] && procd_append_param command -I "${IdleTimeout}"
[ "${SSHKeepAlive}" -ne 0 ] && procd_append_param command -K "${SSHKeepAlive}"
+ [ "${MaxAuthTries}" -ne 0 ] && procd_append_param command -T "${MaxAuthTries}"
+ [ "${RecvWindowSize}" -gt 0 -a "${RecvWindowSize}" -le 1048576 ] && \
+ procd_append_param command -W "${RecvWindowSize}"
[ "${mdns}" -ne 0 ] && procd_add_mdns "ssh" "tcp" "$Port" "daemon=dropbear"
procd_set_param respawn
procd_close_instance
}
-keygen()
-{
- for keytype in rsa; do
- # check for keys
- key=dropbear/dropbear_${keytype}_host_key
- [ -f /tmp/$key -o -s /etc/$key ] || {
- # generate missing keys
- mkdir -p /tmp/dropbear
- [ -x /usr/bin/dropbearkey ] && {
- /usr/bin/dropbearkey -t $keytype -f /tmp/$key 2>&- >&- && exec /etc/rc.common "$initscript" start
- } &
- exit 0
- }
- done
-
- lock /tmp/.switch2jffs
- mkdir -p /etc/dropbear
- mv /tmp/dropbear/dropbear_* /etc/dropbear/
- lock -u /tmp/.switch2jffs
- chown root /etc/dropbear
- chmod 0700 /etc/dropbear
-}
-
load_interfaces()
{
config_get interface "$1" Interface
[ "${enable}" = "1" ] && interfaces=" ${interface} ${interfaces}"
}
+boot()
+{
+ BOOT=1
+ start "$@"
+}
+
start_service()
{
- [ -s /etc/dropbear/dropbear_rsa_host_key ] || keygen
+ hk_generate_as_needed
. /lib/functions.sh
. /lib/functions/network.sh
config_load "${NAME}"
- config_foreach dropbear_instance dropbear
+ config_foreach validate_section_dropbear dropbear dropbear_instance
}
service_triggers()
config_load "${NAME}"
config_foreach load_interfaces dropbear
- [ -n "${interfaces}" ] & {
+ [ -n "${interfaces}" ] && {
for n in $interfaces ; do
procd_add_interface_trigger "interface.*" $n /etc/init.d/dropbear reload
done
procd_add_validation validate_section_dropbear
}
+shutdown() {
+ # close all open connections
+ killall dropbear
+}
+
killclients()
{
local ignore=''
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