Merged gsoc-ssh branch. Closes #910

scripts/ssh-auth-methods.nse

@@ -0,0 +1,38 @@
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+local libssh2_util = require "libssh2-utility"
+
+description = [[
+Returns authenication methods a ssh server supports.
+]]
+
+---
+-- @usage
+--  nmap -p 22 --script ssh-auth-methods --script-args="ssh.user=<username>" <target>
+--
+-- @output
+-- 22/tcp open  ssh     syn-ack
+-- | ssh-auth-methods:
+-- |   Supported authentication methods:
+-- |     publickey
+-- |_    password
+
+author = "Devin Bjelland"
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+
+local username = stdnse.get_script_args "ssh.user" or stdnse.generate_random_string(5)
+portrule = shortport.port_or_service(22, 'ssh')
+
+function action (host, port)
+  local result = stdnse.output_table()
+  local helper = libssh2_util.SSHConnection:new()
+  if not helper:connect(host, port) then
+    return "Failed to connect to ssh server"
+  end
+
+  local authmethods = helper:list(username)
+
+  result["Supported authentication methods"] = authmethods
+
+  return result
+end