534 lines
14 KiB
Ruby
534 lines
14 KiB
Ruby
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#
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# An NTLM Authentication Library for Ruby
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#
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# This code is a derivative of "dbf2.rb" written by yrock
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# and Minero Aoki. You can find original code here:
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# http://jp.rubyist.net/magazine/?0013-CodeReview
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# -------------------------------------------------------------
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# Copyright (c) 2005,2006 yrock
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#
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# This program is free software.
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# You can distribute/modify this program under the terms of the
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# Ruby License.
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#
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# 2011-02-23 refactored by Alexandre Maloteaux for Metasploit Project
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# -------------------------------------------------------------
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#
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# 2006-02-11 refactored by Minero Aoki
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# -------------------------------------------------------------
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#
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# All protocol information used to write this code stems from
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# "The NTLM Authentication Protocol" by Eric Glass. The author
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# would thank to him for this tremendous work and making it
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# available on the net.
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# http://davenport.sourceforge.net/ntlm.html
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# -------------------------------------------------------------
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# Copyright (c) 2003 Eric Glass
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#
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# Permission to use, copy, modify, and distribute this document
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# for any purpose and without any fee is hereby granted,
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# provided that the above copyright notice and this list of
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# conditions appear in all copies.
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# -------------------------------------------------------------
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#
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# The author also looked Mozilla-Firefox-1.0.7 source code,
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# namely, security/manager/ssl/src/nsNTLMAuthModule.cpp and
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# Jonathan Bastien-Filiatrault's libntlm-ruby.
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# "http://x2a.org/websvn/filedetails.php?
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# repname=libntlm-ruby&path=%2Ftrunk%2Fntlm.rb&sc=1"
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# The latter has a minor bug in its separate_keys function.
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# The third key has to begin from the 14th character of the
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# input string instead of 13th:)
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#--
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# $Id: ntlm.rb 11678 2011-01-30 19:26:35Z hdm $
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#++
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#this module defines the message class , useful for easily handling type 1/2/3 ntlm messages
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require 'rex/proto/ntlm/base'
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require 'rex/proto/ntlm/constants'
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require 'rex/proto/ntlm/crypt'
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module Rex
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module Proto
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module NTLM
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class Message < Rex::Proto::NTLM::Base::FieldSet
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BASE = Rex::Proto::NTLM::Base
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CONST = Rex::Proto::NTLM::Constants
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class << Message
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def parse(str)
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m = Type0.new
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m.parse(str)
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case m.type
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when 1
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t = Type1.parse(str)
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when 2
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t = Type2.parse(str)
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when 3
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t = Type3.parse(str)
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else
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raise ArgumentError, "unknown type: #{m.type}"
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end
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t
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end
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def decode64(str)
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parse(Rex::Text::decode_base64(str))
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end
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end#self
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def has_flag?(flag)
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(self[:flag].value & CONST::FLAGS[flag]) == CONST::FLAGS[flag]
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end
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def set_flag(flag)
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self[:flag].value |= CONST::FLAGS[flag]
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end
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def dump_flags
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CONST::FLAG_KEYS.each{ |k| print(k, "=", flag?(k), "\n") }
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end
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def serialize
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deflag
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super + security_buffers.map{|n, f| f.value}.join
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end
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def encode64
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Rex::Text::encode_base64(serialize)
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end
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def decode64(str)
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parse(Rex::Text::decode_base64(str))
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end
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alias head_size size
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def data_size
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security_buffers.inject(0){|sum, a| sum += a[1].data_size}
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end
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def size
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head_size + data_size
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end
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private
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def security_buffers
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@alist.find_all{|n, f| f.instance_of?(BASE::SecurityBuffer)}
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end
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def deflag
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security_buffers.inject(head_size){|cur, a|
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a[1].offset = cur
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cur += a[1].data_size
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}
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end
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def data_edge
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security_buffers.map{ |n, f| f.active ? f.offset : size}.min
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end
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# sub class definitions
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Type0 = Message.define {
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string :sign, {:size => 8, :value => CONST::SSP_SIGN}
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int32LE :type, {:value => 0}
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}
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Type1 = Message.define {
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string :sign, {:size => 8, :value => CONST::SSP_SIGN}
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int32LE :type, {:value => 1}
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int32LE :flag, {:value => CONST::DEFAULT_FLAGS[:TYPE1] }
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security_buffer :domain, {:value => "", :active => false}
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security_buffer :workstation, {:value => "", :active => false}
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string :padding, {:size => 0, :value => "", :active => false }
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}
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class Type1
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class << Type1
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def parse(str)
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t = new
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t.parse(str)
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t
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end
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end
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def parse(str)
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super(str)
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enable(:domain) if has_flag?(:DOMAIN_SUPPLIED)
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enable(:workstation) if has_flag?(:WORKSTATION_SUPPLIED)
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super(str)
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if ( (len = data_edge - head_size) > 0)
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self.padding = "\0" * len
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super(str)
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end
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end
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end
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Type2 = Message.define{
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string :sign, {:size => 8, :value => CONST::SSP_SIGN}
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int32LE :type, {:value => 2}
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security_buffer :target_name, {:size => 0, :value => ""}
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int32LE :flag, {:value => CONST::DEFAULT_FLAGS[:TYPE2]}
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int64LE :challenge, {:value => 0}
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int64LE :context, {:value => 0, :active => false}
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security_buffer :target_info, {:value => "", :active => false}
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string :padding, {:size => 0, :value => "", :active => false }
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}
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class Type2
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class << Type2
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def parse(str)
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t = new
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t.parse(str)
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t
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end
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end
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def parse(str)
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super(str)
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if has_flag?(:TARGET_INFO)
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enable(:context)
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enable(:target_info)
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super(str)
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end
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if ( (len = data_edge - head_size) > 0)
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self.padding = "\0" * len
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super(str)
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end
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end
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def response(arg, opt = {})
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usr = arg[:user]
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pwd = arg[:password]
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if usr.nil? or pwd.nil?
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raise ArgumentError, "user and password have to be supplied"
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end
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if opt[:workstation]
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ws = opt[:workstation]
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else
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ws = ""
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end
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if opt[:client_challenge]
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cc = opt[:client_challenge]
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else
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cc = rand(CONST::MAX64)
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end
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cc = Rex::Text::pack_int64le(cc) if cc.is_a?(Integer)
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opt[:client_challenge] = cc
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if has_flag?(:OEM) and opt[:unicode]
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usr = Rex::Text::to_ascii(usr,'utf-16le')
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pwd = Rex::Text::to_ascii(pwd,'utf-16le')
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ws = Rex::Text::to_ascii(ws,'utf-16le')
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opt[:unicode] = false
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end
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if has_flag?(:UNICODE) and !opt[:unicode]
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usr = Rex::Text::to_unicode(usr,'utf-16le')
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pwd = Rex::Text::to_unicode(pwd,'utf-16le')
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ws = Rex::Text::to_unicode(ws,'utf-16le')
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opt[:unicode] = true
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end
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tgt = self.target_name
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ti = self.target_info
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chal = self[:challenge].serialize
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if opt[:ntlmv2]
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ar = { :ntlmv2_hash => NTLM::ntlmv2_hash(usr, pwd, tgt, opt),
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:challenge => chal, :target_info => ti}
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lm_res = NTLM::lmv2_response(ar, opt)
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ntlm_res = NTLM::ntlmv2_response(ar, opt)
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elsif has_flag?(:NTLM2_KEY)
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ar = {:ntlm_hash => NTLM::ntlm_hash(pwd, opt), :challenge => chal}
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lm_res, ntlm_res = NTLM::ntlm2_session(ar, opt)
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else
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lm_res = NTLM::lm_response(pwd, chal)
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ntlm_res = NTLM::ntlm_response(pwd, chal)
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end
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Type3.create({
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:lm_response => lm_res,
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:ntlm_response => ntlm_res,
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:domain => tgt,
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:user => usr,
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:workstation => ws,
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:flag => self.flag
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})
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end
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end
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Type3 = Message.define{
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string :sign, {:size => 8, :value => CONST::SSP_SIGN}
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int32LE :type, {:value => 3}
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security_buffer :lm_response, {:value => ""}
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security_buffer :ntlm_response, {:value => ""}
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security_buffer :domain, {:value => ""}
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security_buffer :user, {:value => ""}
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security_buffer :workstation, {:value => ""}
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security_buffer :session_key, {:value => "", :active => false }
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int64LE :flag, {:value => 0, :active => false }
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}
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class Type3
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class << Type3
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def parse(str)
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t = new
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t.parse(str)
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t
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end
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def create(arg, opt ={})
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t = new
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t.lm_response = arg[:lm_response]
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t.ntlm_response = arg[:ntlm_response]
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t.domain = arg[:domain]
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t.user = arg[:user]
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t.workstation = arg[:workstation]
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if arg[:session_key]
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t.enable(:session_key)
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t.session_key = arg[session_key]
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end
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if arg[:flag]
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t.enable(:session_key)
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t.enable(:flag)
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t.flag = arg[:flag]
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end
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t
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end
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end#self
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end
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public
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#those class method have been merged from lib/rex/smb/utils
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#
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# Process Type 3 NTLM Message (in Base64)
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#
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# from http://www.innovation.ch/personal/ronald/ntlm.html
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#
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# struct {
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# byte protocol[8]; // 'N', 'T', 'L', 'M', 'S', 'S', 'P', '\0'
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# byte type; // 0x03
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# byte zero[3];
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#
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# short lm_resp_len; // LanManager response length (always 0x18)
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# short lm_resp_len; // LanManager response length (always 0x18)
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# short lm_resp_off; // LanManager response offset
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# byte zero[2];
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#
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# short nt_resp_len; // NT response length (always 0x18)
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# short nt_resp_len; // NT response length (always 0x18)
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# short nt_resp_off; // NT response offset
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# byte zero[2];
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#
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# short dom_len; // domain string length
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# short dom_len; // domain string length
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# short dom_off; // domain string offset (always 0x40)
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# byte zero[2];
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#
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# short user_len; // username string length
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# short user_len; // username string length
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# short user_off; // username string offset
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# byte zero[2];
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#
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# short host_len; // host string length
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# short host_len; // host string length
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# short host_off; // host string offset
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# byte zero[6];
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#
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# short msg_len; // message length
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# byte zero[2];
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#
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# short flags; // 0x8201
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# byte zero[2];
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#
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# byte dom[*]; // domain string (unicode UTF-16LE)
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# byte user[*]; // username string (unicode UTF-16LE)
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# byte host[*]; // host string (unicode UTF-16LE)
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# byte lm_resp[*]; // LanManager response
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# byte nt_resp[*]; // NT response
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# } type_3_message
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#
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def self.process_type3_message(message)
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decode = Rex::Text.decode_base64(message.strip)
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type = decode[8,1].unpack("C").first
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if (type == 3)
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lm_len = decode[12,2].unpack("v").first
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lm_offset = decode[16,2].unpack("v").first
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lm = decode[lm_offset, lm_len].unpack("H*").first
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nt_len = decode[20,2].unpack("v").first
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nt_offset = decode[24,2].unpack("v").first
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nt = decode[nt_offset, nt_len].unpack("H*").first
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dom_len = decode[28,2].unpack("v").first
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dom_offset = decode[32,2].unpack("v").first
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domain = decode[dom_offset, dom_len]
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user_len = decode[36,2].unpack("v").first
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user_offset = decode[40,2].unpack("v").first
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user = decode[user_offset, user_len]
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||
|
|
host_len = decode[44,2].unpack("v").first
|
||
|
|
host_offset = decode[48,2].unpack("v").first
|
||
|
|
host = decode[host_offset, host_len]
|
||
|
|
|
||
|
|
return domain, user, host, lm, nt
|
||
|
|
else
|
||
|
|
return "", "", "", "", ""
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#
|
||
|
|
# Process Type 1 NTLM Messages, return a Base64 Type 2 Message
|
||
|
|
#
|
||
|
|
def self.process_type1_message(message, nonce = "\x11\x22\x33\x44\x55\x66\x77\x88", win_domain = 'DOMAIN',
|
||
|
|
win_name = 'SERVER', dns_name = 'server', dns_domain = 'example.com', downgrade = true)
|
||
|
|
|
||
|
|
dns_name = Rex::Text.to_unicode(dns_name + "." + dns_domain)
|
||
|
|
win_domain = Rex::Text.to_unicode(win_domain)
|
||
|
|
dns_domain = Rex::Text.to_unicode(dns_domain)
|
||
|
|
win_name = Rex::Text.to_unicode(win_name)
|
||
|
|
decode = Rex::Text.decode_base64(message.strip)
|
||
|
|
|
||
|
|
type = decode[8,1].unpack("C").first
|
||
|
|
|
||
|
|
if (type == 1)
|
||
|
|
# A type 1 message has been received, lets build a type 2 message response
|
||
|
|
|
||
|
|
reqflags = decode[12,4]
|
||
|
|
reqflags = reqflags.unpack("V").first
|
||
|
|
|
||
|
|
if (reqflags & CONST::REQUEST_TARGET) == CONST::REQUEST_TARGET
|
||
|
|
|
||
|
|
if (downgrade)
|
||
|
|
# At this time NTLMv2 and signing requirements are not supported
|
||
|
|
if (reqflags & CONST::NEGOTIATE_NTLM2_KEY) == CONST::NEGOTIATE_NTLM2_KEY
|
||
|
|
reqflags = reqflags - CONST::NEGOTIATE_NTLM2_KEY
|
||
|
|
end
|
||
|
|
if (reqflags & CONST::NEGOTIATE_ALWAYS_SIGN) == CONST::NEGOTIATE_ALWAYS_SIGN
|
||
|
|
reqflags = reqflags - CONST::NEGOTIATE_ALWAYS_SIGN
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
flags = reqflags + CONST::TARGET_TYPE_DOMAIN + CONST::TARGET_TYPE_SERVER
|
||
|
|
tid = true
|
||
|
|
|
||
|
|
tidoffset = 48 + win_domain.length
|
||
|
|
tidbuff =
|
||
|
|
[2].pack('v') + # tid type, win domain
|
||
|
|
[win_domain.length].pack('v') +
|
||
|
|
win_domain +
|
||
|
|
[1].pack('v') + # tid type, server name
|
||
|
|
[win_name.length].pack('v') +
|
||
|
|
win_name +
|
||
|
|
[4].pack('v') + # tid type, domain name
|
||
|
|
[dns_domain.length].pack('v') +
|
||
|
|
dns_domain +
|
||
|
|
[3].pack('v') + # tid type, dns_name
|
||
|
|
[dns_name.length].pack('v') +
|
||
|
|
dns_name
|
||
|
|
else
|
||
|
|
flags = CONST::NEGOTIATE_UNICODE + CONST::NEGOTIATE_NTLM
|
||
|
|
tid = false
|
||
|
|
end
|
||
|
|
|
||
|
|
type2msg = "NTLMSSP\0" + # protocol, 8 bytes
|
||
|
|
"\x02\x00\x00\x00" # type, 4 bytes
|
||
|
|
|
||
|
|
if (tid)
|
||
|
|
type2msg += # Target security info, 8 bytes. Filled if REQUEST_TARGET
|
||
|
|
[win_domain.length].pack('v') + # Length, 2 bytes
|
||
|
|
[win_domain.length].pack('v') # Allocated space, 2 bytes
|
||
|
|
end
|
||
|
|
|
||
|
|
type2msg +="\x30\x00\x00\x00" + # Offset, 4 bytes
|
||
|
|
[flags].pack('V') + # flags, 4 bytes
|
||
|
|
nonce + # the nonce, 8 bytes
|
||
|
|
"\x00" * 8 # Context (all 0s), 8 bytes
|
||
|
|
|
||
|
|
if (tid)
|
||
|
|
type2msg += # Target information security buffer. Filled if REQUEST_TARGET
|
||
|
|
[tidbuff.length].pack('v') + # Length, 2 bytes
|
||
|
|
[tidbuff.length].pack('v') + # Allocated space, 2 bytes
|
||
|
|
[tidoffset].pack('V') + # Offset, 4 bytes (usually \x48 + length of win_domain)
|
||
|
|
win_domain + # Target name data (domain in unicode if REQUEST_UNICODE)
|
||
|
|
# Target information data
|
||
|
|
tidbuff + # Type, 2 bytes
|
||
|
|
# Length, 2 bytes
|
||
|
|
# Data (in unicode if REQUEST_UNICODE)
|
||
|
|
"\x00\x00\x00\x00" # Terminator, 4 bytes, all \x00
|
||
|
|
end
|
||
|
|
|
||
|
|
type2msg = Rex::Text.encode_base64(type2msg).delete("\n") # base64 encode and remove the returns
|
||
|
|
else
|
||
|
|
# This is not a Type2 message
|
||
|
|
type2msg = ""
|
||
|
|
end
|
||
|
|
|
||
|
|
return type2msg
|
||
|
|
end
|
||
|
|
|
||
|
|
#
|
||
|
|
# Downgrading Type messages to LMv1/NTLMv1 and removing signing
|
||
|
|
#
|
||
|
|
def self.downgrade_type_message(message)
|
||
|
|
decode = Rex::Text.decode_base64(message.strip)
|
||
|
|
|
||
|
|
type = decode[8,1].unpack("C").first
|
||
|
|
|
||
|
|
if (type > 0 and type < 4)
|
||
|
|
reqflags = decode[12..15] if (type == 1 or type == 3)
|
||
|
|
reqflags = decode[20..23] if (type == 2)
|
||
|
|
reqflags = reqflags.unpack("V")
|
||
|
|
|
||
|
|
# Remove NEGOTIATE_NTLMV2_KEY and NEGOTIATE_ALWAYS_SIGN, this lowers the negotiation
|
||
|
|
# down to LMv1/NTLMv1.
|
||
|
|
if (reqflags & CONST::NEGOTIATE_NTLM2_KEY) == CONST::NEGOTIATE_NTLM2_KEY
|
||
|
|
reqflags = reqflags - CONST::NEGOTIATE_NTLM2_KEY
|
||
|
|
end
|
||
|
|
if (reqflags & CONST::NEGOTIATE_ALWAYS_SIGN) == CONST::NEGOTIATE_ALWAYS_SIGN
|
||
|
|
reqflags = reqflags - CONST::NEGOTIATE_ALWAYS_SIGN
|
||
|
|
end
|
||
|
|
|
||
|
|
# Return the flags back to the decode so we can base64 it again
|
||
|
|
flags = reqflags.to_s(16)
|
||
|
|
0.upto(8) do |idx|
|
||
|
|
if (idx > flags.length)
|
||
|
|
flags.insert(0, "0")
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
idx = 0
|
||
|
|
0.upto(3) do |cnt|
|
||
|
|
if (type == 2)
|
||
|
|
decode[23-cnt] = [flags[idx,1]].pack("C")
|
||
|
|
else
|
||
|
|
decode[15-cnt] = [flags[idx,1]].pack("C")
|
||
|
|
end
|
||
|
|
idx += 2
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
return Rex::Text.encode_base64(decode).delete("\n") # base64 encode and remove the returns
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|