metasploit-framework/tools/lm2ntcrack.rb

#!/usr/bin/env ruby
#
# $Id$
#
# This script cracks any type of NTLM hash
# Credit to	-Yannick Hamon <yannick.hamon[at]xmcopartners.com> for the original idea/perl code
#		-Alexandre Maloteaux <a.maloteaux[at]gmail.com> for improvments
# $Revision$
#

msfbase = File.symlink?(__FILE__) ? File.readlink(__FILE__) : __FILE__
$:.unshift(File.join(File.dirname(msfbase), '..', 'lib'))

require 'rex'
require 'rex/proto/ntlm/crypt'

CRYPT = Rex::Proto::NTLM::Crypt

BRUTE_MODE = 1
HASH_MODE  = 2
PASS_MODE =  3

def usage
	$stderr.puts("\nUsage: #{$0} -t type <options>\n" + $args.usage)
	$stderr.puts("This tool can be use in 3 ways whatever type is choosen\n")
	$stderr.puts("-If only a password (-p) is provided, it will display the hash.\n")
	$stderr.puts("-If a password (-p) and an hash (-a) is provided, it will test the password against the hash.\n")
	$stderr.puts("-If a list of password (-l) is provided and an hash (-a), it will try to bruteforce the hash \n\n")
	exit
end

type = hash = pass = srvchal = clichal = calculatedhash = list = user = domain = nil

$args = Rex::Parser::Arguments.new(
	"-t" => [ true,  "The type of hash to crack : HALFLM/LM/NTLM/HALFNETLMv1/NETLMv1/NETNTLMv1/NETNTLM2_SESSION/NETLMv2/NETNTLMv2"	],
	"-a" => [ true,  "The hash to crack"                                          				],
	"-p" => [ true,  "The password "                                                            		],
	"-l" => [ true,  "The list of password to check against an hash"                               		],
	"-s" => [ true,  "The LM/NTLM Server Challenge (NET* type only)"		                   	],
	"-c" => [ true,  "The LM/NTLM Client Challenge (NETNTLM2_SESSION/NETLMv2/NETNTLMv2/ type only)"    		 	],
	"-u" => [ true,  "The user name                (NETLMv2/NETNTLMv2 type only)"     	],
	"-d" => [ true,  "The domain (machine) name    (NETLMv2/NETNTLMv2 type only)"     	],
	"-h" => [ false, "Display this help information"                                                   	])


$args.parse(ARGV) { |opt, idx, val|
	case opt
		when "-t"
			type = val
		when "-a"
			hash = val
		when "-p"
			pass = val
		when "-l"
			list = val
		when "-s"
			srvchal = val
		when "-c"
			clichal = val
		when "-u"
			user = val
		when "-d"
			domain = val
		when "-h"
			usage
		else
			usage
	end
}

if not type
	usage
else
	if pass and (not (hash or list))
		mode = HASH_MODE
	elsif pass and hash and not list
		mode = PASS_MODE
	elsif list and hash and not pass
		mode = BRUTE_MODE
		if not File.exist? list
			$stderr.puts "[*] The passwords list file does not exist"
			exit
		end
		if not File.file? list
			$stderr.puts "[*] The passwords list provided is not a file"
			exit
		end
		if not File.readable? list
			$stderr.puts "[*] The passwords list file is not readable"
			exit
		end
	else
		usage
	end
end


if type == "HALFLM" or type == "LM" or type == "NTLM" then
	if srvchal != nil or clichal != nil or user != nil or domain != nil  then
		$stderr.puts "[*] No challenge, user or domain must be provided with this type"
		exit
	end
elsif type == "HALFNETLMv1" or type == "NETLMv1" or type == "NETNTLMv1" then
	if clichal != nil  or user != nil or domain != nil then
		$stderr.puts "[*] Client challenge, user or domain must not be provided with this type"
		exit
	end
elsif type == "NETNTLM2_SESSION"  then
	if user != nil or domain != nil then
		$stderr.puts "[*] User or domain must not be provided with this type"
		exit
	end
end

case type
when "HALFLM"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] HALFLM HASH must be exactly 16 bytes of hexadecimal"
			exit
		end
		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				if password =~ /^.{1,7}$/
					puts password
					calculatedhash = CRYPT::lm_hash(password,true).unpack("H*")[0].upcase
					if calculatedhash == hash.upcase
						found = true
						match_password = password
						break
					end
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password.upcase}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not pass =~ /^.{0,7}$/
			$stderr.puts "[*] LM password can not be bigger then 7 characters"
			exit
		end
		calculatedhash = CRYPT::lm_hash(pass,true).unpack("H*")[0].upcase
		puts "[*] The LM hash for #{pass.upcase} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not pass =~ /^.{0,7}$/
			$stderr.puts "[*] LM password can not be bigger then 7 characters"
			exit
		end
		if not hash =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] LM HASH must be exactly 16 bytes of hexadecimal"
			exit
		end
		calculatedhash = CRYPT::lm_hash(pass,true).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass.upcase}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass.upcase}"
			exit
		end
	end

when "LM"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] LM HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				if password =~ /^.{1,14}$/
					puts password
					calculatedhash = CRYPT::lm_hash(password.upcase).unpack("H*")[0].upcase
					if calculatedhash == hash.upcase
						found = true
						match_password = password
						break
					end
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password.upcase}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not pass =~ /^.{0,14}$/
			$stderr.puts "[*] LM password can not be bigger then 14 characters"
			exit
		end
		calculatedhash = CRYPT::lm_hash(pass.upcase).unpack("H*")[0].upcase
		puts "[*] The LM hash for #{pass.upcase} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not pass =~ /^.{0,14}$/
			$stderr.puts "[*] LM password can not be bigger then 14 characters"
			exit
		end
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] LM HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		calculatedhash = CRYPT::lm_hash(pass.upcase).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass.upcase}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass.upcase}"
			exit
		end
	end

when "NTLM"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] NTLM HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				puts password
				calculatedhash = CRYPT::ntlm_hash(password).unpack("H*")[0].upcase
				if calculatedhash == hash.upcase
					found = true
					match_password = password
					break
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		calculatedhash = CRYPT::ntlm_hash(pass).unpack("H*")[0].upcase
		puts "[*] The NTLM hash for #{pass} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] NTLM HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		calculatedhash = CRYPT::ntlm_hash(pass).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass}"
			exit
		end
	end
when  "HALFNETLMv1"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] NETLMv1 HASH must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				if password =~ /^.{1,7}$/
					puts password
					#Rem : cause of the [0,7] there is only 1/256 chance that the guessed password will be the good one
					arglm = { 	:lm_hash => CRYPT::lm_hash(password,true)[0,7],
							:challenge => [ srvchal ].pack("H*") }
					calculatedhash = CRYPT::lm_response(arglm,true).unpack("H*")[0].upcase
					if calculatedhash == hash.upcase
						found = true
						match_password = password
						break
					end
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password.upcase}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not pass =~ /^.{0,7}$/
			$stderr.puts "[*] HALFNETLMv1 password can not be bigger then 7 characters"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		arglm = { 	:lm_hash => CRYPT::lm_hash(pass,true)[0,7],
				:challenge => [ srvchal ].pack("H*") }

		calculatedhash = CRYPT::lm_response(arglm,true).unpack("H*")[0].upcase
		puts "[*] The HALFNETLMv1 hash for #{pass.upcase} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not pass =~ /^.{0,7}$/
			$stderr.puts "[*] HALFNETLMv1 password can not be bigger then 7 characters"
			exit
		end
		if not hash =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] HALFNETLMv1 HASH must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		#Rem : cause of the [0,7] there is only 1/256 chance that the guessed password will be the good one
		arglm = { 	:lm_hash => CRYPT::lm_hash(pass,true)[0,7],
				:challenge => [ srvchal ].pack("H*") }

		calculatedhash = CRYPT::lm_response(arglm,true).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass.upcase}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass.upcase}"
			exit
		end
	end
when  "NETLMv1"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{48})$/
			$stderr.puts "[*] NETLMv1 HASH must be exactly 48 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				if password =~ /^.{1,14}$/
					puts password
					arglm = { 	:lm_hash => CRYPT::lm_hash(password),
							:challenge => [ srvchal ].pack("H*") }
					calculatedhash = CRYPT::lm_response(arglm).unpack("H*")[0].upcase
					if calculatedhash == hash.upcase
						found = true
						match_password = password
						break
					end
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password.upcase}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not pass =~ /^.{1,14}$/
			$stderr.puts "[*] NETLMv1 password can not be bigger then 14 characters"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		arglm = { 	:lm_hash => CRYPT::lm_hash(pass),
				:challenge => [ srvchal ].pack("H*") }

		calculatedhash = CRYPT::lm_response(arglm).unpack("H*")[0].upcase
		puts "[*] The NETLMv1 hash for #{pass.upcase} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not pass =~ /^.{1,14}$/
			$stderr.puts "[*] NETLMv1 password can not be bigger then 14 characters"
			exit
		end
		if not hash =~ /^([a-fA-F0-9]{48})$/
			$stderr.puts "[*] NETLMv1 HASH must be exactly 48 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		arglm = { 	:lm_hash => CRYPT::lm_hash(pass),
				:challenge => [ srvchal ].pack("H*") }

		calculatedhash = CRYPT::lm_response(arglm).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass.upcase}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass.upcase}"
			exit
		end
	end
when "NETNTLMv1"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{48})$/
			$stderr.puts "[*] NETNTLMv1 HASH must be exactly 48 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
			password = line.gsub("\r\n",'').gsub("\n",'')
			puts password
			argntlm = { 	:ntlm_hash =>  CRYPT::ntlm_hash(password),
					:challenge => [ srvchal ].pack("H*") }
			calculatedhash = CRYPT::ntlm_response(argntlm).unpack("H*")[0].upcase
				if calculatedhash == hash.upcase
					found = true
					match_password = password
					break
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		argntlm = { 	:ntlm_hash =>  CRYPT::ntlm_hash(pass),
				:challenge => [ srvchal ].pack("H*") }
		calculatedhash = CRYPT::ntlm_response(argntlm).unpack("H*")[0].upcase
		puts "[*] The NETNTLMv1 hash for #{pass} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not hash =~ /^([a-fA-F0-9]{48})$/
			$stderr.puts "[*] NETNTLMv1 HASH must be exactly 48 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		argntlm = { 	:ntlm_hash =>  CRYPT::ntlm_hash(pass),
				:challenge => [ srvchal ].pack("H*") }

		calculatedhash = CRYPT::ntlm_response(argntlm).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass}"
			exit
		end
	end
when  "NETNTLM2_SESSION"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{48})$/
			$stderr.puts "[*] NETNTLM2_SESSION HASH must be exactly 48 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Client challenge must be exactly 16 bytes of hexadecimal"
			exit
		end

		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				puts password
				argntlm = { 	:ntlm_hash =>  CRYPT::ntlm_hash(password),
						:challenge => [ srvchal ].pack("H*") }
				optntlm = {	:client_challenge => [ clichal ].pack("H*")}

				calculatedhash = CRYPT::ntlm2_session(argntlm,optntlm).join[24,24].unpack("H*")[0].upcase

				if calculatedhash == hash.upcase
					found = true
					match_password = password
					break
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Client challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		argntlm = { 	:ntlm_hash =>  CRYPT::ntlm_hash(pass),
				:challenge => [ srvchal ].pack("H*") }
		optntlm = {	:client_challenge => [ clichal ].pack("H*")}

		calculatedhash = CRYPT::ntlm2_session(argntlm,optntlm).join[24,24].unpack("H*")[0].upcase
		puts "[*] The NETNTLM2_SESSION hash for #{pass} is  : #{calculatedhash}"
		exit
	when PASS_MODE
		if not hash =~ /^([a-fA-F0-9]{48})$/
			$stderr.puts "[*] NETNTLM2_SESSION HASH must be exactly 48 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Client challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		argntlm = { 	:ntlm_hash =>  CRYPT::ntlm_hash(pass),
				:challenge => [ srvchal ].pack("H*") }
		optntlm = {	:client_challenge => [ clichal ].pack("H*")}

		calculatedhash = CRYPT::ntlm2_session(argntlm,optntlm).join[24,24].unpack("H*")[0].upcase

		if hash.upcase == calculatedhash
			puts "[*] Correct password provided : #{pass}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass}"
			exit
		end
	end
when  "NETLMv2"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] NETLMv2 HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge mus be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Client challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not user
			$stderr.puts "[*] User name must be provided with this type"
			exit
		end
		if not domain
			$stderr.puts "[*] Domain name must be provided with this type"
			exit
		end

		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				puts password
				arglm = {	:ntlmv2_hash =>  CRYPT::ntlmv2_hash(user,password, domain),
						:challenge => [ srvchal ].pack("H*") }
				optlm = {	:client_challenge => [ clichal ].pack("H*")}
				calculatedhash = CRYPT::lmv2_response(arglm, optlm).unpack("H*")[0].upcase
				if calculatedhash.slice(0,32) == hash.upcase
					found = true
					match_password = password
					break
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Client challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not user
			$stderr.puts "[*] User name must be provided with this type"
			exit
		end
		if not domain
			$stderr.puts "[*] Domain name must be provided with this type"
			exit
		end

		arglm = {	:ntlmv2_hash =>  CRYPT::ntlmv2_hash(user,pass, domain),
				:challenge => [ srvchal ].pack("H*") }
		optlm = {	:client_challenge => [ clichal ].pack("H*")}
		calculatedhash = CRYPT::lmv2_response(arglm, optlm).unpack("H*")[0].upcase

		puts "[*] The NETLMv2 hash for #{pass} is : #{calculatedhash.slice(0,32)}"
		exit
	when PASS_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] NETLMv2 HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Client challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not user
			$stderr.puts "[*] User name must be provided with this type"
			exit
		end
		if not domain
			$stderr.puts "[*] Domain name must be provided with this type"
			exit
		end
		arglm = {	:ntlmv2_hash =>  CRYPT::ntlmv2_hash(user,pass, domain),
				:challenge => [ srvchal ].pack("H*") }
		optlm = {	:client_challenge => [ clichal ].pack("H*")}
		calculatedhash = CRYPT::lmv2_response(arglm, optlm).unpack("H*")[0].upcase
		if hash.upcase == calculatedhash.slice(0,32)
			puts "[*] Correct password provided : #{pass}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass}"
			exit
		end
	end

when "NETNTLMv2"
	case mode
	when BRUTE_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] NETNTLMv2 HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{17,})$/
			$stderr.puts "[*] Client challenge must be bigger then 16 bytes of hexadecimal"
			exit
		end
		if not user
			$stderr.puts "[*] User name must be provided with this type"
			exit
		end
		if not domain
			$stderr.puts "[*] Domain name must be provided with this type"
			exit
		end

		found = false
		match_password = nil
		File.open(list,"rb") do |password_list|
			password_list.each_line do |line|
				password = line.gsub("\r\n",'').gsub("\n",'')
				puts password
				argntlm = { 	:ntlmv2_hash =>  CRYPT::ntlmv2_hash(user, password, domain),
						:challenge => [ srvchal ].pack("H*") }
				optntlm = { 	:nt_client_challenge => [ clichal ].pack("H*")}
				calculatedhash = CRYPT::ntlmv2_response(argntlm,optntlm).unpack("H*")[0].upcase

				if calculatedhash.slice(0,32) == hash.upcase
					found = true
					match_password = password
					break
				end
			end
		end
		if found
			puts "[*] Correct password found : #{match_password}"
			exit
		else
			puts "[*] No password found"
			exit
		end
	when HASH_MODE
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{17,})$/
			$stderr.puts "[*] Client challenge must be bigger then 16 bytes of hexadecimal"
			exit
		end
		if not user
			$stderr.puts "[*] User name must be provided with this type"
			exit
		end
		if not domain
			$stderr.puts "[*] Domain name must be provided with this type"
			exit
		end

		argntlm = { 	:ntlmv2_hash =>  CRYPT::ntlmv2_hash(user, pass, domain),
				:challenge => [ srvchal ].pack("H*") }
		optntlm = { 	:nt_client_challenge => [ clichal ].pack("H*")}
		calculatedhash = CRYPT::ntlmv2_response(argntlm,optntlm).unpack("H*")[0].upcase

		puts "[*] The NETNTLMv2 hash for #{pass} is : #{calculatedhash.slice(0,32)}"
		exit
	when PASS_MODE
		if not hash =~ /^([a-fA-F0-9]{32})$/
			$stderr.puts "[*] NETNTLMv2 HASH must be exactly 32 bytes of hexadecimal"
			exit
		end
		if not srvchal
			$stderr.puts "[*] Server challenge must be provided with this type"
			exit
		end
		if not srvchal =~ /^([a-fA-F0-9]{16})$/
			$stderr.puts "[*] Server challenge must be exactly 16 bytes of hexadecimal"
			exit
		end
		if not clichal
			$stderr.puts "[*] Client challenge must be provided with this type"
			exit
		end
		if not clichal =~ /^([a-fA-F0-9]{17,})$/
			$stderr.puts "[*] Client challenge must be bigger then 16 bytes of hexadecimal"
			exit
		end
		if not user
			$stderr.puts "[*] User name must be provided with this type"
			exit
		end
		if not domain
			$stderr.puts "[*] Domain name must be provided with this type"
			exit
		end

		argntlm = { 	:ntlmv2_hash =>  CRYPT::ntlmv2_hash(user, pass, domain),
				:challenge => [ srvchal ].pack("H*") }
		optntlm = { 	:nt_client_challenge => [ clichal ].pack("H*")}
		calculatedhash = CRYPT::ntlmv2_response(argntlm,optntlm).unpack("H*")[0].upcase

		if hash.upcase == calculatedhash.slice(0,32)
			puts "[*] Correct password provided : #{pass}"
			exit
		else
			puts "[*] Incorrect password provided : #{pass}"
			exit
		end
	end
else
	$stderr.puts "type must be of type : HALFLM/LM/NTLM/HALFNETLMv1/NETLMv1/NETNTLMv1/NETNTLM2_SESSION/NETLMv2/NETNTLMv2"
	exit
end