Class: Rex::Proto::NTLM::Utils

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/proto/ntlm/utils.rb

Constant Summary collapse

CONST =
Rex::Proto::NTLM::Constants
CRYPT =
Rex::Proto::NTLM::Crypt
XCEPT =
Rex::Proto::NTLM::Exceptions

Class Method Summary collapse

Class Method Details

.asn1encode(str = '') ⇒ Object

Prepends an ASN1 formatted length field to a piece of data


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# File 'lib/rex/proto/ntlm/utils.rb', line 32

def self.asn1encode(str = '')
  res = ''

  # If the high bit of the first byte is 1, it contains the number of
  # length bytes that follow

  case str.length
    when 0 .. 0x7F
      res = [str.length].pack('C') + str
    when 0x80 .. 0xFF
      res = [0x81, str.length].pack('CC') + str
    when 0x100 .. 0xFFFF
      res = [0x82, str.length].pack('Cn') + str
    when  0x10000 .. 0xffffff
      res = [0x83, str.length >> 16, str.length & 0xFFFF].pack('CCn') + str
    when  0x1000000 .. 0xffffffff
      res = [0x84, str.length].pack('CN') + str
    else
      raise "ASN1 str too long"
  end
  return res
end

.create_lm_ntlm_responses(user, pass, challenge_key, domain = '', default_name = '', default_domain = '', dns_host_name = '', dns_domain_name = '', chall_MsvAvTimestamp = nil, spnopt = {}, opt = {}) ⇒ Object

create lm/ntlm responses


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# File 'lib/rex/proto/ntlm/utils.rb', line 479

def self.create_lm_ntlm_responses(user, pass, challenge_key, domain = '', default_name = '', default_domain = '',
        dns_host_name = '', dns_domain_name = '', chall_MsvAvTimestamp = nil, spnopt = {}, opt = {} )

  usentlm2_session 	= opt[:usentlm2_session]	!= nil ? opt[:usentlm2_session] : true
  use_ntlmv2 		= opt[:use_ntlmv2] 		!= nil ? opt[:use_ntlmv2] : false
  send_lm 		= opt[:send_lm] 		!= nil ? opt[:send_lm] : true
  send_ntlm 		= opt[:send_ntlm] 		!= nil ? opt[:send_ntlm] : true

  #calculate the lm/ntlm response
  resp_lm = "\x00" * 24
  resp_ntlm = "\x00" * 24

  client_challenge = Rex::Text.rand_text(8)
  ntlm_cli_challenge = ''
  if send_ntlm  #should be default
    if usentlm2_session
      if use_ntlmv2
        ntlm_cli_challenge = self.make_ntlmv2_clientchallenge(default_domain, default_name, dns_domain_name,
                      dns_host_name,client_challenge ,
                      chall_MsvAvTimestamp, spnopt)
        if self.is_pass_ntlm_hash?(pass)
          argntlm = {
            :ntlmv2_hash =>  CRYPT::ntlmv2_hash(
                      user,
                      [ pass.upcase()[33,65] ].pack('H32'),
                      domain,{:pass_is_hash => true}
                    ),
            :challenge   => challenge_key
          }
        else
          argntlm = {
            :ntlmv2_hash =>  CRYPT::ntlmv2_hash(user, pass, domain),
            :challenge   =>  challenge_key
          }
        end

        optntlm = { :nt_client_challenge => ntlm_cli_challenge}
        ntlmv2_response = CRYPT::ntlmv2_response(argntlm,optntlm)
        resp_ntlm = ntlmv2_response

        if send_lm
          if self.is_pass_ntlm_hash?(pass)
            arglm = {
              :ntlmv2_hash =>  CRYPT::ntlmv2_hash(
                        user,
                        [ pass.upcase()[33,65] ].pack('H32'),
                        domain,{:pass_is_hash => true}
                      ),
              :challenge   => challenge_key
            }
          else
            arglm = {
              :ntlmv2_hash =>  CRYPT::ntlmv2_hash(user,pass, domain),
              :challenge   => challenge_key
            }
          end

          optlm = { :client_challenge => client_challenge }
          resp_lm = CRYPT::lmv2_response(arglm, optlm)
        else
          resp_lm = "\x00" * 24
        end

      else # ntlm2_session
        if self.is_pass_ntlm_hash?(pass)
          argntlm = {
            :ntlm_hash =>  [ pass.upcase()[33,65] ].pack('H32'),
            :challenge => challenge_key
          }
        else
          argntlm = {
            :ntlm_hash =>  CRYPT::ntlm_hash(pass),
            :challenge => challenge_key
          }
        end

        optntlm = {	:client_challenge => client_challenge}
        resp_ntlm = CRYPT::ntlm2_session(argntlm,optntlm).join[24,24]

        # Generate the fake LANMAN hash
        resp_lm = client_challenge + ("\x00" * 16)
      end

    else # we use lmv1/ntlmv1
      if self.is_pass_ntlm_hash?(pass)
        argntlm = {
          :ntlm_hash =>  [ pass.upcase()[33,65] ].pack('H32'),
          :challenge =>  challenge_key
        }
      else
        argntlm = {
          :ntlm_hash =>  CRYPT::ntlm_hash(pass),
          :challenge =>  challenge_key
        }
      end

      resp_ntlm = CRYPT::ntlm_response(argntlm)
      if send_lm
        if self.is_pass_ntlm_hash?(pass)
          arglm = {
            :lm_hash => [ pass.upcase()[0,32] ].pack('H32'),
            :challenge =>  challenge_key
          }
        else
          arglm = {
            :lm_hash => CRYPT::lm_hash(pass),
            :challenge =>  challenge_key
          }
        end
        resp_lm = CRYPT::lm_response(arglm)
      else
        #when windows does not send lm in ntlmv1 type response,
        # it gives lm response the same value as ntlm response
        resp_lm  = resp_ntlm
      end
    end
  else #send_ntlm = false
    #lmv2
    if usentlm2_session && use_ntlmv2
      if self.is_pass_ntlm_hash?(pass)
        arglm = {
          :ntlmv2_hash =>  CRYPT::ntlmv2_hash(
                    user,
                    [ pass.upcase()[33,65] ].pack('H32'),
                    domain,{:pass_is_hash => true}
                  ),
          :challenge => challenge_key
        }
      else
        arglm = {
          :ntlmv2_hash =>  CRYPT::ntlmv2_hash(user,pass, domain),
          :challenge => challenge_key
        }
      end
      optlm = { :client_challenge => client_challenge }
      resp_lm = CRYPT::lmv2_response(arglm, optlm)
    else
      if self.is_pass_ntlm_hash?(pass)
        arglm = {
          :lm_hash => [ pass.upcase()[0,32] ].pack('H32'),
          :challenge =>  challenge_key
        }
      else
        arglm = {
          :lm_hash => CRYPT::lm_hash(pass),
          :challenge =>  challenge_key
        }
      end
      resp_lm = CRYPT::lm_response(arglm)
    end
    resp_ntlm = ""
  end
  return resp_lm, resp_ntlm, client_challenge, ntlm_cli_challenge
end

.create_session_key(ntlmssp_flags, server_ntlmssp_flags, user, pass, domain, challenge_key, client_challenge = '', ntlm_cli_challenge = '', opt = {}) ⇒ Object

create the session key


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# File 'lib/rex/proto/ntlm/utils.rb', line 635

def self.create_session_key(ntlmssp_flags, server_ntlmssp_flags, user, pass, domain, challenge_key,
        client_challenge = '', ntlm_cli_challenge = '' , opt = {} )

  usentlm2_session 	= opt[:usentlm2_session]	!= nil ? opt[:usentlm2_session] : true
  use_ntlmv2 		= opt[:use_ntlmv2] 		!= nil ? opt[:use_ntlmv2] : false
  send_lm 		= opt[:send_lm] 		!= nil ? opt[:send_lm] : true
  send_ntlm 		= opt[:send_ntlm] 		!= nil ? opt[:send_ntlm] : true
  use_lanman_key 		= opt[:use_lanman_key] 		!= nil ? opt[:use_lanman_key] : false

  # Create the sessionkey (aka signing key, aka mackey) and encrypted session key
  # Server will decide for key_size and key_exchange
  enc_session_key = ''
  signing_key = ''

  # Set default key size and key exchange values
  key_size = 40
  key_exchange = false
  # Remove ntlmssp.negotiate56
  ntlmssp_flags &= 0x7fffffff
  # Remove ntlmssp.negotiatekeyexch
  ntlmssp_flags &= 0xbfffffff
  # Remove ntlmssp.negotiate128
  ntlmssp_flags &= 0xdfffffff
  # Check the keyexchange
  if server_ntlmssp_flags & CONST::NEGOTIATE_KEY_EXCH != 0 then
    key_exchange = true
    ntlmssp_flags |= CONST::NEGOTIATE_KEY_EXCH
  end
  # Check 128bits
  if server_ntlmssp_flags & CONST::NEGOTIATE_128 != 0 then
    key_size = 128
    ntlmssp_flags |= CONST::NEGOTIATE_128
    ntlmssp_flags |= CONST::NEGOTIATE_56
  # Check 56bits
  else
    if server_ntlmssp_flags & CONST::NEGOTIATE_56 != 0 then
      key_size = 56
      ntlmssp_flags |= CONST::NEGOTIATE_56
    end
  end
  # Generate the user session key
  lanman_weak = false
  if send_ntlm  # Should be default
    if usentlm2_session
      if use_ntlmv2
        if self.is_pass_ntlm_hash?(pass)
          user_session_key = CRYPT::ntlmv2_user_session_key(user,
                      [ pass.upcase()[33,65] ].pack('H32'),
                      domain,
                      challenge_key, ntlm_cli_challenge,
                      {:pass_is_hash => true})
        else
          user_session_key = CRYPT::ntlmv2_user_session_key(user, pass, domain,
                    challenge_key, ntlm_cli_challenge)
        end
      else
        if self.is_pass_ntlm_hash?(pass)
          user_session_key = CRYPT::ntlm2_session_user_session_key([ pass.upcase()[33,65] ].pack('H32'),
                          challenge_key,
                          client_challenge,
                          {:pass_is_hash => true})
        else
          user_session_key = CRYPT::ntlm2_session_user_session_key(pass, challenge_key,
                          client_challenge)
        end
      end
    else # lmv1/ntlmv1
      # lanman_key may also be used without ntlm response but it is not so much used
      # so we don't care about this feature
      if send_lm && use_lanman_key
        if self.is_pass_ntlm_hash?(pass)
          user_session_key = CRYPT::lanman_session_key([ pass.upcase()[0,32] ].pack('H32'),
                      challenge_key,
                      {:pass_is_hash => true})
        else
          user_session_key = CRYPT::lanman_session_key(pass, challenge_key)
        end
        lanman_weak = true


      else
        if self.is_pass_ntlm_hash?(pass)
          user_session_key = CRYPT::ntlmv1_user_session_key([ pass.upcase()[33,65] ].pack('H32'),
                        {:pass_is_hash => true})
        else
          user_session_key = CRYPT::ntlmv1_user_session_key(pass)
        end
      end
    end
  else
      if usentlm2_session && use_ntlmv2
        if self.is_pass_ntlm_hash?(pass)
          user_session_key = CRYPT::lmv2_user_session_key(user, [ pass.upcase()[33,65] ].pack('H32'),
                      domain,
                      challenge_key, client_challenge,
                      {:pass_is_hash => true})
        else
          user_session_key = CRYPT::lmv2_user_session_key(user, pass, domain,
                      challenge_key, client_challenge)
        end
      else
        if self.is_pass_ntlm_hash?(pass)
          user_session_key = CRYPT::lmv1_user_session_key([ pass.upcase()[0,32] ].pack('H32'),
                        {:pass_is_hash => true})
        else
          user_session_key = CRYPT::lmv1_user_session_key(pass)
        end
      end
  end

  user_session_key = CRYPT::make_weak_sessionkey(user_session_key,key_size, lanman_weak)

  # Sessionkey and encrypted session key
  if key_exchange
    signing_key = Rex::Text.rand_text(16)
    enc_session_key = CRYPT::encrypt_sessionkey(signing_key, user_session_key)
  else
    signing_key = user_session_key
  end

  return signing_key, enc_session_key, ntlmssp_flags


end

.is_pass_ntlm_hash?(str) ⇒ Boolean

Determine whether the password is a known hash format

Returns:

  • (Boolean)

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# File 'lib/rex/proto/ntlm/utils.rb', line 25

def self.is_pass_ntlm_hash?(str)
  str.downcase =~ /^[0-9a-f]{32}:[0-9a-f]{32}$/
end

.make_negotiate_secblob_resp(account, domain) ⇒ Object

GSS BLOB usefull for SMB_NEGOCIATE_RESPONSE message mechTypes: 4 items : MechType: 1.2.840.48018.1.2.2 (MS KRB5 - Microsoft Kerberos 5) MechType: 1.2.840.113554.1.2.2 (KRB5 - Kerberos 5) MechType: 1.2.840.113554.1.2.2.3 (KRB5 - Kerberos 5 - User to User) MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP - Microsoft NTLM Security Support Provider) mechListMIC: principal: [email protected]


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# File 'lib/rex/proto/ntlm/utils.rb', line 93

def self.make_negotiate_secblob_resp(, domain)
  blob =
  "\x60" + self.asn1encode(
    "\x06" + self.asn1encode(
      "\x2b\x06\x01\x05\x05\x02"
    ) +
    "\xa0" + self.asn1encode(
      "\x30" + self.asn1encode(
        "\xa0" + self.asn1encode(
          "\x30" + self.asn1encode(
            "\x06" + self.asn1encode(
              "\x2a\x86\x48\x82\xf7\x12\x01\x02\x02"
            ) +
            "\x06" + self.asn1encode(
              "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02"
            ) +
            "\x06" + self.asn1encode(
              "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x03"
            ) +
            "\x06" + self.asn1encode(
              "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a"
            )
          )
        ) +
        "\xa3" + self.asn1encode(
          "\x30" + self.asn1encode(
            "\xa0" + self.asn1encode(
              "\x1b" + self.asn1encode(
                 + '@' + domain
              )
            )
          )
        )
      )
    )
  )

  return blob
end

.make_ntlm_flags(opt = {}) ⇒ Object

Return the correct ntlmflags upon the configuration


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# File 'lib/rex/proto/ntlm/utils.rb', line 337

def self.make_ntlm_flags(opt = {})

  signing 		= opt[:signing] 		!= nil ? opt[:signing] : false
  usentlm2_session 	= opt[:usentlm2_session]	!= nil ? opt[:usentlm2_session] : true
  use_ntlmv2 		= opt[:use_ntlmv2] 		!= nil ? opt[:use_ntlmv2] : false
  send_lm 		= opt[:send_lm] 		!= nil ? opt[:send_lm] : true
  send_ntlm 		= opt[:send_ntlm] 		!= nil ? opt[:send_ntlm] : true
  use_lanman_key 		= opt[:use_lanman_key] 		!= nil ? opt[:use_lanman_key] : false

  if signing
    ntlmssp_flags = 0xe2088215
  else

    ntlmssp_flags = 0xa2080205
  end

  if usentlm2_session
    if use_ntlmv2
      #set Negotiate Target Info
      ntlmssp_flags |= CONST::NEGOTIATE_TARGET_INFO
    end

  else
    #remove the ntlm2_session flag
    ntlmssp_flags &= 0xfff7ffff
    #set lanmanflag only when lm and ntlm are sent
    if send_lm
      ntlmssp_flags |= CONST::NEGOTIATE_LMKEY if use_lanman_key
    end
  end

  #we can also downgrade ntlm2_session when we send only lmv1
  ntlmssp_flags &= 0xfff7ffff if usentlm2_session && (not use_ntlmv2) && (not send_ntlm)

  return ntlmssp_flags
end

.make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) ⇒ Object

BLOB without GSS Usefull for ntlmssp type 3 message


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# File 'lib/rex/proto/ntlm/utils.rb', line 242

def self.make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201)
  lm ||= "\x00" * 24
  ntlm ||= "\x00" * 24

  domain_uni = Rex::Text.to_unicode(domain)
  user_uni   = Rex::Text.to_unicode(user)
  name_uni   = Rex::Text.to_unicode(name)
  session    = enc_session_key

  ptr  = 64

  blob = "NTLMSSP\x00" +
    [ 3 ].pack('V') +

    [	# Lan Manager Response
      lm.length,
      lm.length,
      (ptr)
    ].pack('vvV') +

    [	# NTLM Manager Response
      ntlm.length,
      ntlm.length,
      (ptr += lm.length)
    ].pack('vvV') +

    [	# Domain Name
      domain_uni.length,
      domain_uni.length,
      (ptr += ntlm.length)
    ].pack('vvV') +

    [	# Username
      user_uni.length,
      user_uni.length,
      (ptr += domain_uni.length)
    ].pack('vvV') +

    [	# Hostname
      name_uni.length,
      name_uni.length,
      (ptr += user_uni.length)
    ].pack('vvV') +

    [	# Session Key (none)
      session.length,
      session.length,
      (ptr += name_uni.length)
    ].pack('vvV') +

    [ flags ].pack('V') +

    lm +
    ntlm +
    domain_uni +
    user_uni +
    name_uni +
    session + "\x00"
  return blob

end

.make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ⇒ Object

BLOB without GSS usefull for ntlm type 2 message


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# File 'lib/rex/proto/ntlm/utils.rb', line 184

def self.make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags)

  addr_list  = ''
  addr_list  << [2, win_domain.length].pack('vv') + win_domain
  addr_list  << [1, win_name.length].pack('vv') + win_name
  addr_list  << [4, dns_domain.length].pack('vv') + dns_domain
  addr_list  << [3, dns_name.length].pack('vv') + dns_name
  addr_list  << [0, 0].pack('vv')

  ptr  = 0
  blob =	"NTLMSSP\x00" +
      [2].pack('V') +
      [
        win_domain.length,  # length
        win_domain.length,  # max length
        (ptr += 48) # offset
      ].pack('vvV') +
      [ flags ].pack('V') +
      chall +
      "\x00\x00\x00\x00\x00\x00\x00\x00" +
      [
        addr_list.length,  # length
        addr_list.length,  # max length
        (ptr += win_domain.length)
      ].pack('vvV') +
      win_domain +
      addr_list
  return blob
end

.make_ntlmssp_blob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags = 0x80201) ⇒ Object

BLOB without GSS usefull for ntlmssp type 1 message


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# File 'lib/rex/proto/ntlm/utils.rb', line 134

def self.make_ntlmssp_blob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags=0x80201)
  blob =	"NTLMSSP\x00" +
    [1, flags].pack('VV') +

    [
      domain.length,  #length
      domain.length,  #max length
      32
    ].pack('vvV') +

    [
      name.length,	#length
      name.length, 	#max length
      domain.length + 32
    ].pack('vvV') +

    domain + name
  return blob
end

.make_ntlmssp_secblob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) ⇒ Object

GSS BLOB Usefull for ntlmssp type 3 message


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# File 'lib/rex/proto/ntlm/utils.rb', line 305

def self.make_ntlmssp_secblob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201)

  blob =
    "\xa1" + self.asn1encode(
      "\x30" + self.asn1encode(
        "\xa2" + self.asn1encode(
          "\x04" + self.asn1encode(
          make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags )
        )
      )
    )
  )
  return blob
end

.make_ntlmssp_secblob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ⇒ Object

GSS BLOB usefull for ntlmssp type 2 message


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# File 'lib/rex/proto/ntlm/utils.rb', line 215

def self.make_ntlmssp_secblob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags)

  blob =
    "\xa1" + self.asn1encode(
      "\x30" + self.asn1encode(
        "\xa0" + self.asn1encode(
          "\x0a" + self.asn1encode(
            "\x01"
          )
        ) +
        "\xa1" + self.asn1encode(
          "\x06" + self.asn1encode(
            "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a"
          )
        ) +
        "\xa2" + self.asn1encode(
          "\x04" + self.asn1encode(
            make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags)
          )
        )
      )
    )

  return blob
end

.make_ntlmssp_secblob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags = 0x80201) ⇒ Object

GSS BLOB usefull for ntlmssp type 1 message


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# File 'lib/rex/proto/ntlm/utils.rb', line 155

def self.make_ntlmssp_secblob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags=0x80201)
  blob =
  "\x60" + self.asn1encode(
    "\x06" + self.asn1encode(
      "\x2b\x06\x01\x05\x05\x02"
    ) +
    "\xa0" + self.asn1encode(
      "\x30" + self.asn1encode(
        "\xa0" + self.asn1encode(
          "\x30" + self.asn1encode(
            "\x06" + self.asn1encode(
              "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a"
            )
          )
        ) +
        "\xa2" + self.asn1encode(
          "\x04" + self.asn1encode(
            make_ntlmssp_blob_init(domain, name, flags)
          )
        )
      )
    )
  )

  return blob
end

.make_ntlmv2_clientchallenge(win_domain, win_name, dns_domain, dns_name, client_challenge = nil, chall_MsvAvTimestamp = nil, spnopt = {}) ⇒ Object

This function return an ntlmv2 client challenge This is a partial implementation, full description is in [MS-NLMP].pdf around 3.1.5.2.1 :-/


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# File 'lib/rex/proto/ntlm/utils.rb', line 430

def self.make_ntlmv2_clientchallenge(win_domain, win_name, dns_domain, dns_name,
          client_challenge = nil, chall_MsvAvTimestamp = nil, spnopt = {})

  client_challenge ||= Rex::Text.rand_text(8)
  # We have to set the timestamps here to the one in the challenge message from server if present
  # If we don't do that, recent server like Seven/2008 will send a STATUS_INVALID_PARAMETER error packet
  timestamp = chall_MsvAvTimestamp != '' ? chall_MsvAvTimestamp : self.time_unix_to_smb(Time.now.to_i).reverse.pack("VV")
  # Make those values unicode as requested
  win_domain = Rex::Text.to_unicode(win_domain)
  win_name = Rex::Text.to_unicode(win_name)
  dns_domain = Rex::Text.to_unicode(dns_domain)
  dns_name = Rex::Text.to_unicode(dns_name)
  # Make the AV_PAIRs
  addr_list  = ''
  addr_list  << [2, win_domain.length].pack('vv') + win_domain
  addr_list  << [1, win_name.length].pack('vv') + win_name
  addr_list  << [4, dns_domain.length].pack('vv') + dns_domain
  addr_list  << [3, dns_name.length].pack('vv') + dns_name
  addr_list  << [7, 8].pack('vv') + timestamp

  # Windows Seven / 2008r2 Request this type if in local security policies,
  # Microsoft network server : Server SPN target name validation level is set to <Required from client>
  # otherwise it send an STATUS_ACCESS_DENIED packet
  if spnopt[:use_spn]
    spn= Rex::Text.to_unicode("cifs/#{spnopt[:name] || 'unknow'}")
    addr_list  << [9, spn.length].pack('vv') + spn
  end

  # MAY BE USEFUL FOR FUTURE
  # Seven (client) add at least one more av that is of type MsAvRestrictions (8)
  # maybe this will be usefull with future windows OSs but has no use at all for the moment afaik
  # restriction_encoding = 	[48,0,0,0].pack("VVV") + # Size, Z4, IntegrityLevel, SubjectIntegrityLevel
  # 			Rex::Text.rand_text(32)	 # MachineId generated on startup on win7 and above
  # addr_list  << [8, restriction_encoding.length].pack('vv') + restriction_encoding

  # Seven (client) and maybe others versions also add an av of type MsvChannelBindings (10) but the hash is "\x00" * 16
  # addr_list  << [10, 16].pack('vv') + "\x00" * 16


  addr_list  << [0, 0].pack('vv')
  ntlm_clientchallenge = 	[1,1,0,0].pack("CCvV") + #RespType, HiRespType, Reserved1, Reserved2
        timestamp + #Timestamp
        client_challenge + 	#clientchallenge
        [0].pack("V")  +	#Reserved3
        addr_list + "\x00" * 4

end

.make_ntlmv2_secblob_successObject

GSS BLOB Usefull for SMB Success


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# File 'lib/rex/proto/ntlm/utils.rb', line 322

def self.make_ntlmv2_secblob_success
  blob =
    "\xa1" + self.asn1encode(
      "\x30" + self.asn1encode(
        "\xa0" + self.asn1encode(
          "\x0a" + self.asn1encode(
            "\x00"
          )
        )
      )
    )
  return blob
end

.make_simple_negotiate_secblob_respObject

GSS BLOB usefull for SMB_NEGOCIATE_RESPONSE message mechTypes: 2 items : -MechType: 1.3.6.1.4.1.311.2.2.30 (SNMPv2-SMI::enterprises.311.2.2.30) -MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP - Microsoft NTLM Security Support Provider)

this is the default on Win7


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# File 'lib/rex/proto/ntlm/utils.rb', line 63

def self.make_simple_negotiate_secblob_resp
  blob =
  "\x60" + self.asn1encode(
    "\x06" + self.asn1encode(
      "\x2b\x06\x01\x05\x05\x02"
    ) +
    "\xa0" + self.asn1encode(
      "\x30" + self.asn1encode(
        "\xa0" + self.asn1encode(
          "\x30" + self.asn1encode(
            "\x06" + self.asn1encode(
              "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a"
            )
          )
        )
      )
    )
  )

  return blob
end

.parse_ntlm_type_2_blob(blob) ⇒ Object

Parse an ntlm type 2 challenge blob and return usefull data


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# File 'lib/rex/proto/ntlm/utils.rb', line 376

def self.parse_ntlm_type_2_blob(blob)
  data = {}
  # Extract the NTLM challenge key the lazy way
  cidx = blob.index("NTLMSSP\x00\x02\x00\x00\x00")

  if not cidx
    raise XCEPT::NTLMMissingChallenge
  end

  data[:challenge_key] = blob[cidx + 24, 8]

  data[:server_ntlmssp_flags] = blob[cidx + 20, 4].unpack("V")[0]

  # Extract the address list from the blob
  alist_len,alist_mlen,alist_off = blob[cidx + 40, 8].unpack("vvV")
  alist_buf = blob[cidx + alist_off, alist_len]

  while(alist_buf.length > 0)
    atype, alen = alist_buf.slice!(0,4).unpack('vv')
    break if atype == 0x00
    addr = alist_buf.slice!(0, alen)
    case atype
    when 1
      #netbios name
      data[:default_name] =  addr.gsub("\x00", '')
    when 2
      #netbios domain
      data[:default_domain] = addr.gsub("\x00", '')
    when 3
      #dns name
      data[:dns_host_name] =  addr.gsub("\x00", '')
    when 4
      #dns domain
      data[:dns_domain_name] =  addr.gsub("\x00", '')
    when 5
      #The FQDN of the forest.
    when 6
      #A 32-bit value indicating server or client configuration
    when 7
      #Client time
      data[:chall_MsvAvTimestamp] = addr
    when 8
      #A Restriction_Encoding structure
    when 9
      #The SPN of the target server.
    when 10
      #A channel bindings hash.
    end
  end
  return data
end

.time_unix_to_smb(unix_time) ⇒ Object

Convert a unix timestamp to a 64-bit signed server time


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# File 'lib/rex/proto/ntlm/utils.rb', line 17

def self.time_unix_to_smb(unix_time)
  t64 = (unix_time + 11644473600) * 10000000
  thi = (t64 & 0xffffffff00000000) >> 32
  tlo = (t64 & 0x00000000ffffffff)
  return [thi, tlo]
end