Libinjection Ruby Wrapper

LibInject.rb

module LibInject
  extend FFI::Library
  ffi_lib_flags :now, :global
  ffi_lib 'libinjection.so'
  class Sfilter < FFI::Struct
    # layout :s, :pointer,
    #        :slen, :size_t,
    #        :userdata, :pointer,
    #        :flags, :int,
    #        :pos, :size_t
  end
  attach_function :libinjection_sqli_init, [Sfilter, :string, :size_t, :int], :long
  attach_function :libinjection_is_sqli, [Sfilter], :int
end



class FilterSqli
  def self.is_sqlinjection?(data)
    length = data.size
    puts "alive"
    return 0 if length == 0
    puts "alive 2"
    sfilter = FFI::Pointer.new :pointer, length
    puts "Alive 3 #{sfilter}"
    LibInject::libinjection_sqli_init(sfilter, data, length, 0)
    puts "alive 4"
    is_injection = LibInject::libinjection_is_sqli(sfilter)
    rescue => e
      puts e.message, e.backtrace
  end
end