Class: Rex::Proto::SMB::SimpleClient

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/proto/smb/simple_client.rb,
lib/rex/proto/smb/simple_client/open_file.rb,
lib/rex/proto/smb/simple_client/open_pipe.rb

Direct Known Subclasses

SimpleClientPipe

Defined Under Namespace

Classes: OpenFile, OpenPipe

Constant Summary collapse

CONST =

Some short-hand class aliases

Rex::Proto::SMB::Constants
CRYPT = 
Rex::Proto::SMB::Crypt
UTILS = 
Rex::Proto::SMB::Utils
XCEPT = 
Rex::Proto::SMB::Exceptions
EVADE = 
Rex::Proto::SMB::Evasions

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(socket, direct = false, versions = [1, 2, 3], always_encrypt: true, backend: nil, client: nil) ⇒ SimpleClient

Pass the socket object and a boolean indicating whether the socket is netbios or cifs



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# File 'lib/rex/proto/smb/simple_client.rb', line 26

def initialize(socket, direct = false, versions = [1, 2, 3], always_encrypt: true, backend: nil, client: nil)
  self.socket = socket
  self.direct = direct
  self.versions = versions
  self.shares = {}
  self.server_max_buffer_size = 1024 # 4356 (workstation) or 16644 (server) expected

  if !client.nil?
    self.client = client
  elsif (self.versions == [1] && backend.nil?) || backend == :rex
    self.client = Rex::Proto::SMB::Client.new(socket)
  elsif (backend.nil? || backend == :ruby_smb)
    self.client = RubySMB::Client.new(RubySMB::Dispatcher::Socket.new(self.socket, read_timeout: 60),
                                      username: '',
                                      password: '',
                                      smb1: self.versions.include?(1),
                                      smb2: self.versions.include?(2),
                                      smb3: self.versions.include?(3),
                                      always_encrypt: always_encrypt
                  )

    self.client.evasion_opts = {
      # Padding is performed between packet headers and data
      'pad_data' => EVADE::EVASION_NONE,
      # File path padding is performed on all open/create calls
      'pad_file' => EVADE::EVASION_NONE,
      # Modify the \PIPE\ string in trans_named_pipe calls
      'obscure_trans_pipe' => EVADE::EVASION_NONE,
    }
  end
end

Instance Attribute Details

#client ⇒ Object

Private accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 23

def client
  @client
end

#direct ⇒ Object

Private accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 23

def direct
  @direct
end

#last_error ⇒ Object

Public accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 20

def last_error
  @last_error
end

#last_share ⇒ Object

Private accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 23

def last_share
  @last_share
end

#server_max_buffer_size ⇒ Object

Public accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 20

def server_max_buffer_size
  @server_max_buffer_size
end

#shares ⇒ Object

Private accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 23

def shares
  @shares
end

#socket ⇒ Object

Private accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 23

def socket
  @socket
end

#versions ⇒ Object

Private accessors



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# File 'lib/rex/proto/smb/simple_client.rb', line 23

def versions
  @versions
end

Instance Method Details

#connect(share) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 172

def connect(share)
  ok = self.client.tree_connect(share)

  if self.client.is_a?(RubySMB::Client)
    tree_id = ok.id
  else
    tree_id = ok['Payload']['SMB'].v['TreeID']
  end

  self.shares[share] = tree_id
  self.last_share = share
end

#create_pipe(path, perm = 'o') ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 235

def create_pipe(path, perm = 'o')
  disposition = UTILS.create_mode_to_disposition(perm)
  ok = self.client.create_pipe(path, disposition)

  if self.client.is_a?(RubySMB::Client)
    file_id = ok
  else
    file_id = ok['Payload'].v['FileID']
  end

  fh = OpenPipe.new(self.client, path, self.client.last_tree_id, file_id, self.versions)
end

#delete(*args) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 227

def delete(*args)
  if self.client.is_a?(RubySMB::Client)
    self.client.delete(args[0])
  else
    self.client.delete(*args)
  end
end

#disconnect(share) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 185

def disconnect(share)
  if self.shares[share]
    ok = self.client.tree_disconnect(self.shares[share])
    self.shares.delete(share)
    return ok
  end
  false
end

#login(name = '', user = '', pass = '', domain = '', verify_signature = false, usentlmv2 = false, usentlm2_session = true, send_lm = true, use_lanman_key = false, send_ntlm = true, native_os = 'Windows 2000 2195', native_lm = 'Windows 2000 5.0', spnopt = {}) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 58

def (name = '', user = '', pass = '', domain = '',
    verify_signature = false, usentlmv2 = false, usentlm2_session = true,
    send_lm = true, use_lanman_key = false, send_ntlm = true,
    native_os = 'Windows 2000 2195', native_lm = 'Windows 2000 5.0', spnopt = {})

  begin

    if (self.direct != true)
      self.client.session_request(name)
    end
    self.client.native_os = native_os
    self.client.native_lm = native_lm
    self.client.verify_signature = verify_signature
    self.client.use_ntlmv2 = usentlmv2
    self.client.usentlm2_session = usentlm2_session
    self.client.send_lm = send_lm
    self.client.use_lanman_key =  use_lanman_key
    self.client.send_ntlm = send_ntlm

    dlog("SMB version(s) to negotiate: #{self.versions}")
    ok = self.client.negotiate
    dlog("Negotiated SMB version: SMB#{negotiated_smb_version}")

    if self.client.is_a?(RubySMB::Client)
      self.server_max_buffer_size = self.client.server_max_buffer_size
    else
      self.server_max_buffer_size = ok['Payload'].v['MaxBuff']
    end

    # Disable NTLMv2 Session for Windows 2000 (breaks authentication on some systems)
    # XXX: This in turn breaks SMB auth for Windows 2000 configured to enforce NTLMv2
    # XXX: Tracked by ticket #4785#4785
    if self.client.native_lm =~ /Windows 2000 5\.0/ and usentlm2_session
    #	self.client.usentlm2_session = false
    end

    self.client.spnopt = spnopt

    # In case the user unsets the username or password option, we make sure this is
    # always a string
    user ||= ''
    pass ||= ''

    res = self.client.session_setup(user, pass, domain)
  rescue ::Interrupt
    raise $!
  rescue ::Exception => e
    elog(e)
    n = XCEPT::LoginError.new
    n.source = e
    if e.respond_to?('error_code') && e.respond_to?('get_error')
      n.error_code   = e.error_code
      n.error_reason = e.get_error(e.error_code)
    end
    raise n
  end

  # RubySMB does not raise any exception if the Session Setup fails
  if self.client.is_a?(RubySMB::Client) && res != WindowsError::NTStatus::STATUS_SUCCESS
    n = XCEPT::LoginError.new
    n.source       = res
    n.error_code   = res.value
    n.error_reason = res.name
    raise n
  end

  return true
end

#login_split_next_ntlm1(user, domain, hash_lm, hash_nt) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 154

def (user, domain, hash_lm, hash_nt)
  begin
    ok = self.client.session_setup_no_ntlmssp_prehash(user, domain, hash_lm, hash_nt)
  rescue ::Interrupt
    raise $!
  rescue ::Exception => e
    n = XCEPT::LoginError.new
    n.source = e
    if(e.respond_to?('error_code'))
      n.error_code   = e.error_code
      n.error_reason = e.get_error(e.error_code)
    end
    raise n
  end

  return true
end

#login_split_start_ntlm1(name = '') ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 128

def (name = '')

  begin

    if (self.direct != true)
      self.client.session_request(name)
    end

    # Disable extended security
    self.client.negotiate(false)
  rescue ::Interrupt
    raise $!
  rescue ::Exception => e
    n = XCEPT::LoginError.new
    n.source = e
    if(e.respond_to?('error_code'))
      n.error_code   = e.error_code
      n.error_reason = e.get_error(e.error_code)
    end
    raise n
  end

  return true
end

#negotiated_smb_version ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 252

def negotiated_smb_version
  return 1 if self.client.is_a?(Rex::Proto::SMB::Client)
  self.client.negotiated_smb_version || -1
end

#open(path, perm, chunk_size = 48000, read: true, write: false) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 194

def open(path, perm, chunk_size = 48000, read: true, write: false)
  if self.client.is_a?(RubySMB::Client)
    mode = 0
    if perm.include?('c')
      if perm.include?('o')
        mode = RubySMB::Dispositions::FILE_OPEN_IF
      elsif perm.include?('t')
        mode = RubySMB::Dispositions::FILE_OVERWRITE_IF
      else
        mode = RubySMB::Dispositions::FILE_CREATE
      end
    else
      if perm.include?('o')
        mode = RubySMB::Dispositions::FILE_OPEN
      elsif perm.include?('t')
        mode = RubySMB::Dispositions::FILE_OVERWRITE
      end
    end

    file_id = self.client.open(path, mode, read: true, write: write || perm.include?('w'))
  else
    mode = UTILS.open_mode_to_mode(perm)
    access = UTILS.open_mode_to_access(perm)

    ok = self.client.open(path, mode, access)
    file_id = ok['Payload'].v['FileID']
  end

  fh = OpenFile.new(self.client, path, self.client.last_tree_id, file_id, self.versions)
  fh.chunk_size = chunk_size
  fh
end

#trans_pipe(fid, data, no_response = nil) ⇒ Object 



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# File 'lib/rex/proto/smb/simple_client.rb', line 248

def trans_pipe(fid, data, no_response = nil)
  client.trans_named_pipe(fid, data, no_response)
end