From d3c45eaee122516d0620bb523d09661a8e6f71ca Mon Sep 17 00:00:00 2001
From: acinonyx <acinonyx@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 2 Feb 2011 18:50:50 +0000
Subject: [PATCH] [package] busybox: Disable telnet if an SSH public key for
 root exists (#8760)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25317 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 package/busybox/files/telnet | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/package/busybox/files/telnet b/package/busybox/files/telnet
index b8823379b..a1e17275a 100755
--- a/package/busybox/files/telnet
+++ b/package/busybox/files/telnet
@@ -10,8 +10,14 @@ has_root_pwd() {
 	test -n "${pwd#!}"
 }
 
+has_ssh_pubkey() {
+	( test -x /usr/sbin/dropbear && grep -qs "^ssh-" /etc/dropbear/authorized_keys ) || \
+	( test -x /usr/sbin/sshd && grep -qs "^ssh-" /root/.ssh/authorized_keys )
+}
+
 start() {
-	if ( ! has_root_pwd /etc/passwd && ! has_root_pwd /etc/shadow ) || \
+	if ( ! has_ssh_pubkey && \
+	     ! has_root_pwd /etc/passwd && ! has_root_pwd /etc/shadow ) || \
 	   ( [ ! -x /usr/sbin/dropbear ] && [ ! -x /usr/sbin/sshd ] );
 	then
 		telnetd -l /bin/login.sh
-- 
2.20.1