Brent Cook
123 lines
3.3 KiB
Ruby
123 lines
3.3 KiB
Ruby
require 'msf/util/helper'
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require 'open3'
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module Metasploit
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module Framework
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module Compiler
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module Mingw
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MINGW_X86 = 'i686-w64-mingw32-gcc'
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MINGW_X64 = 'x86_64-w64-mingw32-gcc'
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INCLUDE_DIR = File.join(Msf::Config.data_directory, 'headers', 'windows', 'c_payload_util')
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UTILITY_DIR = File.join(Msf::Config.data_directory, 'utilities', 'encrypted_payload')
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def compile_c(src)
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cmd = build_cmd(src)
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stdin_err, status = Open3.capture2e(cmd)
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stdin_err
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end
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def build_cmd(src)
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src_file = "#{self.file_name}.c"
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exe_file = "#{self.file_name}.exe"
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cmd = ''
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link_options = '-Wl,'
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File.write(src_file, src)
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opt_level = [ 'Os', 'O0', 'O1', 'O2', 'O3', 'Og' ].include?(self.opt_lvl) ? "-#{self.opt_lvl} " : "-O2 "
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cmd << "#{self.mingw_bin} "
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cmd << "#{src_file} -I #{INCLUDE_DIR} "
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cmd << "-o #{exe_file} "
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# gives each function its own section
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# allowing them to be reordered
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cmd << '-ffunction-sections '
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cmd << '-fno-asynchronous-unwind-tables '
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cmd << '-nostdlib '
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cmd << '-fno-ident '
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cmd << opt_level
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link_options << '--no-seh,'
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link_options << '-s,' if self.strip_syms
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link_options << "-T#{self.link_script}" if self.link_script
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cmd << link_options
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cmd
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end
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def cleanup_files
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src_file = "#{self.file_name}.c"
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exe_file = "#{self.file_name}.exe"
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unless self.keep_src
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File.delete(src_file) if File.exist?(src_file)
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end
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unless self.keep_exe
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File.delete(exe_file) if File.exist?(exe_file)
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end
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rescue Errno::ENOENT
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print_error("Failed to delete file")
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end
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class X86
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include Mingw
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attr_reader :file_name, :keep_exe, :keep_src, :strip_syms, :link_script, :opt_lvl, :mingw_bin
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def initialize(opts={})
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@file_name = opts[:f_name]
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@keep_exe = opts[:keep_exe]
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@keep_src = opts[:keep_src]
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@strip_syms = opts[:strip_symbols]
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@link_script = opts[:linker_script]
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@opt_lvl = opts[:opt_lvl]
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@mingw_bin = MINGW_X86
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end
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def self.available?
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!!(Msf::Util::Helper.which(MINGW_X86))
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end
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end
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class X64
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include Mingw
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attr_reader :file_name, :keep_exe, :keep_src, :strip_syms, :link_script, :opt_lvl, :mingw_bin
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def initialize(opts={})
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@file_name = opts[:f_name]
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@keep_exe = opts[:keep_exe]
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@keep_src = opts[:keep_src]
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@strip_syms = opts[:strip_symbols]
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@link_script = opts[:linker_script]
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@opt_lvl = opts[:opt_lvl]
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@mingw_bin = MINGW_X64
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end
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def self.available?
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!!(Msf::Util::Helper.which(MINGW_X64))
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end
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end
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class UncompilablePayloadError < StandardError
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def initialize(msg='')
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super(msg)
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end
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end
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class CompiledPayloadNotFoundError < StandardError
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def initialize(msg='Compiled executable not found')
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super(msg)
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end
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end
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end
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end
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end
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end
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