Gecko [ lostrivercommunitycenter.com ]

Name	Size	Permission	Date
data	[ DIR ]	drwxr-xr-x	2025-12-23 02:50
afp.lua	73.07 KB	-rw-r--r--	2025-12-18 12:48
ajp.lua	16.66 KB	-rw-r--r--	2025-12-18 12:48
amqp.lua	10.41 KB	-rw-r--r--	2025-12-18 12:48
anyconnect.lua	4.31 KB	-rw-r--r--	2025-12-18 12:48
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pcre.luadoc	6.79 KB	-rw-r--r--	2025-12-18 12:48
pgsql.lua	20.6 KB	-rw-r--r--	2025-12-18 12:48
pop3.lua	5.74 KB	-rw-r--r--	2025-12-18 12:48
pppoe.lua	29.42 KB	-rw-r--r--	2025-12-18 12:48
proxy.lua	11.37 KB	-rw-r--r--	2025-12-18 12:48
punycode.lua	11.5 KB	-rw-r--r--	2025-12-18 12:48
rand.lua	2.7 KB	-rw-r--r--	2025-12-18 12:48
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rpc.lua	107.75 KB	-rw-r--r--	2025-12-18 12:48
rpcap.lua	11.08 KB	-rw-r--r--	2025-12-18 12:48
rsync.lua	5.21 KB	-rw-r--r--	2025-12-18 12:48
rtsp.lua	8.66 KB	-rw-r--r--	2025-12-18 12:48
sasl.lua	16.51 KB	-rw-r--r--	2025-12-18 12:48
shortport.lua	12.83 KB	-rw-r--r--	2025-12-18 12:48
sip.lua	30.07 KB	-rw-r--r--	2025-12-18 12:48
slaxml.lua	17.9 KB	-rw-r--r--	2025-12-18 12:48
smb.lua	176.62 KB	-rw-r--r--	2025-12-18 12:48
smb2.lua	16.12 KB	-rw-r--r--	2025-12-18 12:48
smbauth.lua	37.33 KB	-rw-r--r--	2025-12-18 12:48
smtp.lua	19.85 KB	-rw-r--r--	2025-12-18 12:48
snmp.lua	17.24 KB	-rw-r--r--	2025-12-18 12:48
socks.lua	8.25 KB	-rw-r--r--	2025-12-18 12:48
srvloc.lua	10.99 KB	-rw-r--r--	2025-12-18 12:48
ssh1.lua	9.15 KB	-rw-r--r--	2025-12-18 12:48
ssh2.lua	13.44 KB	-rw-r--r--	2025-12-18 12:48
sslcert.lua	36.17 KB	-rw-r--r--	2025-12-18 12:48
sslv2.lua	9.68 KB	-rw-r--r--	2025-12-18 12:48
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strbuf.lua	4.52 KB	-rw-r--r--	2025-12-18 12:48
strict.lua	2.53 KB	-rw-r--r--	2025-12-18 12:48
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tftp.lua	9.41 KB	-rw-r--r--	2025-12-18 12:48
tls.lua	69.24 KB	-rw-r--r--	2025-12-18 12:48
tn3270.lua	46.99 KB	-rw-r--r--	2025-12-18 12:48
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unpwdb.lua	10.52 KB	-rw-r--r--	2025-12-18 12:48
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url.lua	16.54 KB	-rw-r--r--	2025-12-18 12:48
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vnc.lua	25.55 KB	-rw-r--r--	2025-12-18 12:48
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wsdd.lua	11.98 KB	-rw-r--r--	2025-12-18 12:48
xdmcp.lua	12.09 KB	-rw-r--r--	2025-12-18 12:48
xmpp.lua	15.91 KB	-rw-r--r--	2025-12-18 12:48
zlib.luadoc	4.88 KB	-rw-r--r--	2025-12-18 12:48

Rename

---
-- A smallish SOCKS version 5 proxy protocol implementation
--
-- @author Patrik Karlsson <patrik@cqure.net>
--

local match = require "match"
local nmap = require "nmap"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
_ENV = stdnse.module("socks", stdnse.seeall)

-- SOCKS Authentication methods
AuthMethod = {
  NONE = 0,
  GSSAPI = 1,
  USERPASS = 2,
}

Request = {

-- Class that handles the connection request to the server
  Connect = {

-- Creates a new instance of the class
    -- @param auth_method table of requested authentication methods
    -- @return o instance on success, nil on failure
    new = function(self, auth_method)
      local o = {
        version = 5,
        auth_method = ( "table" ~= type(auth_method) and { auth_method } or auth_method )
      }
      setmetatable(o, self)
      self.__index = self
      return o
    end,

-- Converts the instance to string, so that it can be sent to the
    -- server.
    -- @return string containing the raw request
    __tostring = function(self)
      return string.pack("Bs1", self.version,
        string.pack(("B"):rep(#self.auth_method), table.unpack(self.auth_method)))
    end,

-- Class that handles the authentication request to the server
  Authenticate = {

-- Creates a new instance of the class
    -- @param auth_method number with the requested authentication method
    -- @param creds method specific table of credentials
    --        currently only user and pass authentication is supported
    --        this method requires two fields to be present
    --        <code>username</code> and <code>password</code>
    -- @return o instance on success, nil on failure
    new = function(self, auth_method, creds)
      local o = {
        auth_method = auth_method,
        creds = creds
      }
      setmetatable(o, self)
      self.__index = self
      if ( auth_method == 2 ) then
        return o
      end
    end,

-- Converts the instance to string, so that it can be sent to the
    -- server.
    -- @return string containing the raw request
    __tostring = function(self)
      -- we really don't support anything but 2, but let's pretend that
      -- we actually do
      if ( 2 == self.auth_method ) then
        local version = 1
        local username= self.creds.username or ""
        local password= self.creds.password or ""

username = (username == "") and "\0" or username
        password = (password == "") and "\0" or password

return string.pack("Bs1s1", version, username, password)
      end
    end,

}

Response = {

-- Class that handles the connection response
  Connect = {

-- Creates a new instance of the class
    -- @param data string containing the data as received over the socket
    -- @return o instance on success, nil on failure
    new = function(self, data)
      local o = { data = data }
      setmetatable(o, self)
      self.__index = self
      if ( o:parse() ) then
        return o
      end
    end,

-- Parses the received data and populates member variables
    -- @return true on success, false on failure
    parse = function(self)
      if ( #self.data ~= 2 ) then
        return
      end
      local pos
      self.version, self.method, pos = string.unpack("BB", self.data)
      return true
    end

-- Class that handles the authentication response
  Authenticate = {

Status = {
      SUCCESS = 0,
      -- could be anything but zero
      FAIL    = 1,
    },

-- Parses the received data and populates member variables
    -- @return true on success, false on failure
    parse = function(self)
      if ( #self.data ~= 2 ) then
        return
      end
      local pos
      self.version, self.status, pos = string.unpack("BB", self.data)
      return true
    end,

-- checks if the authentication was successful or not
    -- @return true on success, false on failure
    isSuccess = function(self)
      return ( self.status == self.Status.SUCCESS )
    end,

}

-- The main script interface
Helper = {

-- Create a new instance of the class
  -- @param host table containing the host table
  -- @param port table containing the port table
  -- @param options table containing library options, currently:
  --        <code>timeout</code> - socket timeout in ms
  -- @return o instance of Helper
  new = function(self, host, port, options)
    options = options or {}
    local o = { host = host, port = port, options = options }
    setmetatable(o, self)
    self.__index = self
    return o
  end,

-- Get the authentication method name by number
  -- @param method number containing the authentication method
  -- @return string containing the method name or Unknown
  authNameByNumber = function(self, method)
    local methods = {
      [0]  = "No authentication",
      [1]  = "GSSAPI",
      [2]  = "Username and password",
    }
    return methods[method] or ("Unknown method (%d)"):format(method)
  end,

-- Connects to the SOCKS server
  -- @param auth_method table containing the auth. methods to request
  -- @return status true on success, false on failure
  -- @return response table containing the response or err string on failure
  connect = function(self, auth_method, socket)
    self.socket = socket or nmap.new_socket()
    self.socket:set_timeout(self.options.timeout or 10000)
    local status, err = self.socket:connect(self.host, self.port)
    if ( not(status) ) then
      return status, err
    end

auth_method = auth_method or {AuthMethod.NONE, AuthMethod.GSSAPI, AuthMethod.USERPASS}
    status = self.socket:send( tostring(Request.Connect:new(auth_method)) )
    if ( not(status) ) then
      self.socket:close()
      return false, "Failed to send connection request to server"
    end

local status, data = self.socket:receive_buf(match.numbytes(2), true)
    if ( not(status) ) then
      self.socket:close()
      return false, "Failed to receive connection response from server"
    end

local response = Response.Connect:new(data)
    if ( not(response) ) then
      return false, "Failed to parse response from server"
    end

if ( response.version ~= 5 ) then
      return false, ("Unsupported SOCKS version (%d)"):format(response.version)
    end
    if ( response.method == 0xFF ) then
      return false, "No acceptable authentication methods"
    end

-- store the method so authenticate knows what to use
    self.auth_method = response.method
    return true, response
  end,

-- Authenticates to the SOCKS server
  -- @param creds table containing authentication method specific fields
  --        currently only authentication method 2 (username and pass) is
  --        implemented. That method requires the following fields:
  --        <code>username</code> - containing the username
  --        <code>password</code> - containing the password
  -- @return status true on success, false on failure
  -- @return err string containing the error message
  authenticate = function(self, creds)
    if ( self.auth_method ~= 2 ) then
      return false, "Authentication method not supported"
    end
    local req = Request.Authenticate:new(self.auth_method, creds)
    if ( not(req) ) then
      return false, "Failed to create authentication request"
    end

local status = self.socket:send(tostring(req))
    if ( not(status) ) then
      return false, "Failed to send authentication request"
    end

if ( 2 == self.auth_method ) then
      local status, data = self.socket:receive_buf(match.numbytes(2), true)
      local auth = Response.Authenticate:new(data)

if ( not(auth) ) then
        return false, "Failed to parse authentication response"
      end

if ( auth:isSuccess() ) then
        return true, "Authentication was successful"
      else
        return false, "Authentication failed"
      end

end
    return false, "Unsupported authentication method"
  end,

-- closes the connection to the server
  close = function(self)
    return self.socket:close()
  end,

}

return _ENV;