banner_file is now '/etc/issue.net' in honeyfs by default

add default Debian motd file

honeyfs/etc/motd

@@ -0,0 +1,7 @@
+
+The programs included with the Debian GNU/Linux system are free software;
+the exact distribution terms for each program are described in the
+individual files in /usr/share/doc/*/copyright.
+
+Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
+permitted by applicable law.

kippo.cfg.dist

@@ -148,8 +148,7 @@ ssh_version_string = SSH-2.0-OpenSSH_5.1p1 Debian-5
 
 # Banner file to be displayed before the first login attempt.
 #
-# (default: not specified)
-#banner_file =
+#banner_file = DEPRECATED; always '/etc/issue.net' in honeyfs
 
 # exit_jail tries to 'trick' the attacker with another shell. Set to true to create
 # another fake prompt after logout

kippo/core/ssh.py

@@ -38,17 +38,15 @@ class HoneyPotSSHUserAuthServer(userauth.SSHUserAuthServer):
         if self.bannerSent:
             return
         cfg = config()
-        if not cfg.has_option('honeypot', 'banner_file'):
-            return
         try:
-            data = file(cfg.get('honeypot', 'banner_file')).read()
+            honeyfs = cfg.get('honeypot', 'contents_path')
+            issuefile = honeyfs + "/etc/issue.net"
+            data = file( issuefile ).read()
         except IOError:
-            log.msg( 'Banner file %s does not exist!' % \
-                cfg.get('honeypot', 'banner_file') )
             return
         if not data or not len(data.strip()):
             return
-        data = '\r\n'.join(data.splitlines() + [''])
+        data = '\r\n'.join(data.splitlines() )
         self.transport.sendPacket(
             userauth.MSG_USERAUTH_BANNER, NS(data) + NS('en'))
         self.bannerSent = True