Module: Metasploit::Framework::Compiler::Mingw

Included in:
X64, X86
Defined in:
lib/metasploit/framework/compiler/mingw.rb

Defined Under Namespace

Classes: CompiledPayloadNotFoundError, UncompilablePayloadError, X64, X86

Constant Summary collapse

MINGW_X86 = 
'i686-w64-mingw32-gcc'
MINGW_X64 = 
'x86_64-w64-mingw32-gcc'
INCLUDE_DIR = 
File.join(Msf::Config.data_directory, 'headers', 'windows', 'c_payload_util')
UTILITY_DIR = 
File.join(Msf::Config.data_directory, 'utilities', 'encrypted_payload')
OPTIMIZATION_FLAGS = 
[ 'Os', 'O0', 'O1', 'O2', 'O3', 'Og' ]

Instance Method Summary collapse

Instance Method Details

#build_cmd(src) ⇒ Object 



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# File 'lib/metasploit/framework/compiler/mingw.rb', line 24

def build_cmd(src)
  src_file = "#{self.file_name}.c"
  exe_file = "#{self.file_name}.exe"

  cmd = ''
  link_options = '-Wl,'

  File.write(src_file, src)

  opt_level = OPTIMIZATION_FLAGS.include?(self.opt_lvl) ? "-#{self.opt_lvl} " : "-O2 "

  cmd << "#{self.mingw_bin} "
  cmd << "#{src_file} -I #{INCLUDE_DIR} "
  cmd << "#{self.include_dirs.map { |include_dir| "-iquote #{include_dir}" }.join(' ')} " if self.include_dirs.any?
  cmd << "-o #{exe_file} "

  # gives each function its own section
  # allowing them to be reordered
  cmd << '-ffunction-sections '
  cmd << '-fno-asynchronous-unwind-tables '
  cmd << '-fno-ident '
  cmd << opt_level

  if self.compile_options
    cmd << self.compile_options
  else
    link_options << '--image-base=0x0,'
    cmd << '-nostdlib '
  end

  link_options << '--no-seh'
  link_options << ',-s' if self.strip_syms
  link_options << ",-T#{self.link_script}" if self.link_script

  cmd << link_options

  cmd
end

#cleanup_files ⇒ Object 



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# File 'lib/metasploit/framework/compiler/mingw.rb', line 63

def cleanup_files
  src_file = "#{self.file_name}.c"
  exe_file = "#{self.file_name}.exe"

  unless self.keep_src
    File.delete(src_file) if File.exist?(src_file)
  end

  unless self.keep_exe
    File.delete(exe_file) if File.exist?(exe_file)
  end
rescue Errno::ENOENT
  print_error("Failed to delete file")
end

#compile_c(src) ⇒ Object 



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# File 'lib/metasploit/framework/compiler/mingw.rb', line 13

def compile_c(src)
  cmd = build_cmd(src)

  if self.show_compile_cmd
    print("#{cmd}\n")
  end

  stdin_err, status = Open3.capture2e(cmd)
  stdin_err
end