Method: PSRP::MessageDecoder#initialize

Defined in:
lib/wsmv/psrp_message.rb

#initialize(raw_text) ⇒ MessageDecoder

Returns a new instance of MessageDecoder.



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# File 'lib/wsmv/psrp_message.rb', line 92

def initialize(raw_text)
  # Message ID - 8bytes
  # Fragment ID - 8bytes
  # reserved - 6bits
  # end fragment - 1bit
  # start fragment - 1bit
  # blob_length - 4bytes
  # destination - 4bytes
  # message_type - 4bytes
  # client runspace GUID - 16bytes
  # client PID GUID - 16bytes
  # BOM 3bytes
  # 
  # Data - blob_length - 43 bytes (40 blob bytes + BOM)
  unencoded = Base64.decode64(raw_text)
  fields = unencoded.unpack('Q>2CL>L<2h32h32C3A*')

  @message_id = fields[0]
  @fragment_id = fields[1]
  @fragment_flags = fields[2]
  @blob_length = fields[3]
  
  if is_start_fragment?
    @destination = fields[4]
    @message_type = fields[5]
    @client_runspace = fields[6]
    @client_pid = fields[7]
    @data = fields[11]
  else
    fields = unencoded.unpack('Q>2CL>A*')
    @destination = nil
    @message_type = nil
    @client_runspace = nil
    @client_pid = nil
    @data = fields[4]
  end
end