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# -*- coding: binary -*-
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module Msf
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module Ui
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module Console
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module CommandDispatcher
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###
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#
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# NOP module command dispatcher.
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#
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###
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class Nop
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  include Msf::Ui::Console::ModuleCommandDispatcher
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  @@generate_opts = Rex::Parser::Arguments.new(
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    "-b" => [ true,  "The list of characters to avoid: '\\x00\\xff'"  ],
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    "-h" => [ false, "Help banner."                                   ],
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    "-s" => [ true,  "The comma separated list of registers to save." ],
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    "-t" => [ true,  "The output type: ruby, perl, c, or raw."        ])
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  #
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  # Returns the hash of supported commands.
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  #
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  def commands
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    super.update({
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      "generate" => "Generates a NOP sled",
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    })
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  end
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  #
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  # Returns the name of the command dispatcher.
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  #
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  def name
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    "Nop"
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  end
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  #
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  # Generates a NOP sled.
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  #
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  def cmd_generate(*args)
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    # No arguments?  Tell them how to use it.
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    if (args.length == 0)
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      args << "-h"
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    end
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    # Parse the arguments
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    badchars = nil
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    saveregs = nil
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    type     = "ruby"
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    length   = 200
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    @@generate_opts.parse(args) { |opt, idx, val|
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      case opt
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        when nil
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          length = val.to_i
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        when '-b'
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          badchars = Rex::Text.dehex(val)
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when "-s", "-c"  # 'c' is deprecated; remove later
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  saveregs = val.split(/,\s?/)
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          saveregs = val.split(/,\s?/)
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        when '-t'
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          type = val
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        when '-h'
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          print(
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            "Usage: generate [options] length\n\n" +
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            "Generates a NOP sled of a given length.\n" +
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            @@generate_opts.usage)
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          return false
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      end
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    }
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    # Generate the sled
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    begin
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      sled = mod.generate_simple(
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        length,
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        'BadChars'      => badchars,
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        'SaveRegisters' => saveregs,
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        'Format'        => type)
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    rescue
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      log_error("Sled generation failed: #{$!}.")
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      return false
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    end
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    # Display generated sled
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    print(sled)
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    return true
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  end
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end
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end end end end
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