metasploit-framework/lib/msf/base/simple/auxiliary.rb

# -*- coding: binary -*-
module Msf
module Simple

###
#
# A simplified auxiliary wrapper.
#
###
module Auxiliary

  include Module

  #
  # Wraps the auxiliary process in a simple single method.  The options
  # hash can have the following values passed in it:
  #
  # Action
  #
  # 	The selected action name.
  #
  # OptionStr
  #
  # 	A string of comma separated option values that should be imported into
  # 	the datastore.
  #
  # Options
  #
  # 	A hash of values to be imported directly into the datastore.
  #
  # LocalInput
  #
  # 	The local input handle that data can be read in from.
  #
  # LocalOutput
  #
  # 	The local output through which data can be displayed.
  #
  # RunAsJob
  #
  # 	Whether or not the exploit should be run in the context of a background
  # 	job.
  #
  def self.run_simple(omod, opts = {}, &block)

    # Clone the module to prevent changes to the original instance
    mod = omod.replicant
    Msf::Simple::Framework.simplify_module( mod, false )
    yield(mod) if block_given?

    # Import options from the OptionStr or Option hash.
    mod._import_extra_options(opts)

    mod.datastore['ACTION'] = opts['Action'] if opts['Action']

    # Verify the ACTION
    if (mod.actions.length > 0 and not mod.action)
      raise MissingActionError, "You must specify a valid Action", caller
    end

    # Verify the options
    mod.options.validate(mod.datastore)

    # Initialize user interaction
    if ! opts['Quiet']
      mod.init_ui(opts['LocalInput'] || mod.user_input, opts['LocalOutput'] || mod.user_output)
    else
      mod.init_ui(nil, nil)
    end

    ctx = [ mod ]
    if(mod.passive? or opts['RunAsJob'])
      mod.job_id = mod.framework.jobs.start_bg_job(
        "Auxiliary: #{mod.refname}",
        ctx,
        Proc.new { |ctx_| self.job_run_proc(ctx_) },
        Proc.new { |ctx_| self.job_cleanup_proc(ctx_) }
      )
      # Propagate this back to the caller for console mgmt
      omod.job_id = mod.job_id
    else
      self.job_run_proc(ctx)
      self.job_cleanup_proc(ctx)
    end

  end

  #
  # Calls the class method.
  #
  def run_simple(opts = {}, &block)
    Msf::Simple::Auxiliary.run_simple(self, opts, &block)
  end

  #
  # Initiates a check, setting up the exploit to be used.  The following
  # options can be specified:
  #
  # LocalInput
  #
  # 	The local input handle that data can be read in from.
  #
  # LocalOutput
  #
  # 	The local output through which data can be displayed.
  #
  def self.check_simple(mod, opts)
    if opts['LocalInput']
      mod.init_ui(opts['LocalInput'], opts['LocalOutput'])
    end

    # Validate the option container state so that options will
    # be normalized
    mod.validate

    # Run check
    mod.check
  end

  #
  # Calls the class method.
  #
  def check_simple(opts)
    Msf::Simple::Auxiliary.check_simple(self, opts)
  end


protected

  #
  # Job run proc, sets up the module and kicks it off.
  #
  def self.job_run_proc(ctx)
    mod = ctx[0]
    begin
      mod.setup
      mod.framework.events.on_module_run(mod)
      mod.run
    rescue ::Timeout::Error => e
      mod.error = e
      mod.print_error("Auxiliary triggered a timeout exception")
      mod.cleanup
      return
    rescue ::Interrupt => e
      mod.error = e
      mod.print_error("Auxiliary interrupted by the console user")
      mod.cleanup
      return
    rescue ::Exception => e
      mod.error = e
      mod.print_error("Auxiliary failed: #{e.class} #{e}")
      if(e.class.to_s != 'Msf::OptionValidateError')
        mod.print_error("Call stack:")
        e.backtrace.each do |line|
          break if line =~ /lib.msf.base.simple.auxiliary.rb/
          mod.print_error("  #{line}")
        end
      end

      elog("Auxiliary failed: #{e.class} #{e}", 'core', LEV_0)
      dlog("Call stack:\n#{$@.join("\n")}", 'core', LEV_3)

      mod.cleanup

      return
    end
  end

  #
  # Clean up the module after the job completes.
  #
  def self.job_cleanup_proc(ctx)
    mod = ctx[0]
    mod.framework.events.on_module_complete(mod)
    # Allow the exploit to cleanup after itself, that messy bugger.
    mod.cleanup
  end

end

end
end