From 746b5ee2e2eb941d39bba1f8f78498e8fcb518cb Mon Sep 17 00:00:00 2001
From: Scott Ullrich <sullrich@pfsense.org>
Date: Sun, 17 Jul 2005 19:43:11 +0000
Subject: [PATCH] If any of the /etc/ssh/ files are corrupted then remove them
 so they will be forced to regenerate.

---
 etc/sshd | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/etc/sshd b/etc/sshd
index b2ecf6eb21..af3e9e4dd4 100755
--- a/etc/sshd
+++ b/etc/sshd
@@ -32,6 +32,23 @@
 
 	$stderr = fopen("php://stderr", "w");
 
+	function file_size($file) {
+	  $size = filesize($file);
+	  if ( $size == 0)
+	   $size = exec("ls -l $file | awk '{print $5}'");
+	  return $size;
+	}
+
+	/*    if any of these files are 0 bytes then they are corrupted.
+	 *    remove them
+	 */
+	$files_to_check = array('ssh_host_dsa_key','ssh_host_dsa_key.pub','ssh_host_key','ssh_host_key.pub','ssh_host_rsa_key','ssh_host_rsa_key.pub');
+	foreach($files_to_check as $f2c) {
+		if(file_size($f2c)==0) {
+			mwexec("rm /etc/ssh_host*");
+		}
+	}
+
 	if($argv[1] == "stop" || $argv[0] == "stop") {
 		if(file_exists("/root/.authorized_keys")) {
 			$ak = return_filename_as_string("/root/.authorized_keys");