From: Andre McCurdy <armccurdy@gmail.com>
Date: Tue, 7 Mar 2017 01:42:25 +0000 (-0800)
Subject: dropbear: drop support for DSA host keys in dropbear init script
X-Git-Tag: lucaceresoli/bug-15201-perf-libtraceevent-missing~22161
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bd7341a38a8bb5387ea81dbccfed327370569f3;p=thirdparty%2Fopenembedded%2Fopenembedded-core-contrib.git

dropbear: drop support for DSA host keys in dropbear init script

Bring the dropbear init script into sync with the systemd service
file (dropbearkey.service supports RSA host keys only) and with
recent versions of openssh which deprecate DSA host keys.

  https://www.gentoo.org/support/news-items/2015-08-13-openssh-weak-keys.html

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
---

diff --git a/meta/recipes-core/dropbear/dropbear/init b/meta/recipes-core/dropbear/dropbear/init
index 434bd6b971d..f6e1c462fab 100755
--- a/meta/recipes-core/dropbear/dropbear/init
+++ b/meta/recipes-core/dropbear/dropbear/init
@@ -40,49 +40,28 @@ done
 if [ $readonly_rootfs = "1" ]; then
   mkdir -p /var/lib/dropbear
   DROPBEAR_RSAKEY_DEFAULT="/var/lib/dropbear/dropbear_rsa_host_key"
-  DROPBEAR_DSSKEY_DEFAULT="/var/lib/dropbear/dropbear_dss_host_key"
 else
   DROPBEAR_RSAKEY_DEFAULT="/etc/dropbear/dropbear_rsa_host_key"
-  DROPBEAR_DSSKEY_DEFAULT="/etc/dropbear/dropbear_dss_host_key"
 fi
 
 test -z "$DROPBEAR_BANNER" || \
   DROPBEAR_EXTRA_ARGS="$DROPBEAR_EXTRA_ARGS -b $DROPBEAR_BANNER"
 test -n "$DROPBEAR_RSAKEY" || \
   DROPBEAR_RSAKEY=$DROPBEAR_RSAKEY_DEFAULT
-test -n "$DROPBEAR_DSSKEY" || \
-  DROPBEAR_DSSKEY=$DROPBEAR_DSSKEY_DEFAULT
-test -n "$DROPBEAR_KEYTYPES" || \
-  DROPBEAR_KEYTYPES="rsa"
 
 gen_keys() {
-for t in $DROPBEAR_KEYTYPES; do
-  case $t in
-    rsa)
-        if [ -f "$DROPBEAR_RSAKEY" -a ! -s "$DROPBEAR_RSAKEY" ]; then
-                rm $DROPBEAR_RSAKEY || true
-        fi
-        test -f $DROPBEAR_RSAKEY || dropbearkey -t rsa -f $DROPBEAR_RSAKEY $DROPBEAR_RSAKEY_ARGS
-	;;
-    dsa)
-        if [ -f "$DROPBEAR_DSSKEY" -a ! -s "$DROPBEAR_DSSKEY" ]; then
-                rm $DROPBEAR_DSSKEY || true
-        fi
-        test -f $DROPBEAR_DSSKEY || dropbearkey -t dss -f $DROPBEAR_DSSKEY $DROPBEAR_DSSKEY_ARGS
-	;;
-  esac
-done
+    if [ -f "$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
 }
 
 case "$1" in
   start)
 	echo -n "Starting $DESC: "
 	gen_keys
-	KEY_ARGS=""
-	test -f $DROPBEAR_DSSKEY && KEY_ARGS="$KEY_ARGS -d $DROPBEAR_DSSKEY"
-	test -f $DROPBEAR_RSAKEY && KEY_ARGS="$KEY_ARGS -r $DROPBEAR_RSAKEY"
 	start-stop-daemon -S -p $PIDFILE \
-	  -x "$DAEMON" -- $KEY_ARGS \
+	  -x "$DAEMON" -- -r $DROPBEAR_RSAKEY \
 	    -p "$DROPBEAR_PORT" $DROPBEAR_EXTRA_ARGS
 	echo "$NAME."
 	;;
@@ -95,11 +74,8 @@ case "$1" in
 	echo -n "Restarting $DESC: "
 	start-stop-daemon -K -x "$DAEMON" -p $PIDFILE
 	sleep 1
-	KEY_ARGS=""
-	test -f $DROPBEAR_DSSKEY && KEY_ARGS="$KEY_ARGS -d $DROPBEAR_DSSKEY"
-	test -f $DROPBEAR_RSAKEY && KEY_ARGS="$KEY_ARGS -r $DROPBEAR_RSAKEY"
 	start-stop-daemon -S -p $PIDFILE \
-	  -x "$DAEMON" -- $KEY_ARGS \
+	  -x "$DAEMON" -- -r $DROPBEAR_RSAKEY \
 	    -p "$DROPBEAR_PORT" $DROPBEAR_EXTRA_ARGS
 	echo "$NAME."
 	;;