707 lines
12 KiB
Ruby
707 lines
12 KiB
Ruby
require 'resolv'
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require 'msf/core'
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require 'rex/socket'
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module Msf
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###
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#
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# The base class for all options.
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#
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###
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class OptBase
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#
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# Initializes a named option with the supplied attribute array.
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# The array is composed of three values.
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#
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# attrs[0] = required (boolean type)
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# attrs[1] = description (string)
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# attrs[2] = default value
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# attrs[3] = possible enum values
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#
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def initialize(in_name, attrs = [])
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self.name = in_name
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self.advanced = false
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self.evasion = false
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self.required = attrs[0] || false
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self.desc = attrs[1]
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self.default = attrs[2]
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self.enums = [ *(attrs[3]) ].map { |x| x.to_s }
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end
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#
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# Returns true if this is a required option.
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#
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def required?
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return required
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end
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#
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# Returns true if this is an advanced option.
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#
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def advanced?
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return advanced
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end
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#
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# Returns true if this is an evasion option.
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#
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def evasion?
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return evasion
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end
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#
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# Returns true if the supplied type is equivalent to this option's type.
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#
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def type?(in_type)
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return (type == in_type)
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end
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#
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# If it's required and the value is nil or empty, then it's not valid.
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#
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def valid?(value)
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return (required? and (value == nil or value.to_s.empty?)) ? false : true
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end
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#
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# Returns true if the value supplied is nil and it's required to be
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# a valid value
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#
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def empty_required_value?(value)
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return (required? and value.nil?)
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end
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#
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# Normalizes the supplied value to conform with the type that the option is
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# conveying.
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#
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def normalize(value)
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value
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end
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#
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# The name of the option.
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#
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attr_reader :name
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#
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# Whether or not the option is required.
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#
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attr_reader :required
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#
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# The description of the option.
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#
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attr_reader :desc
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#
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# The default value of the option.
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#
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attr_reader :default
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#
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# Storing the name of the option.
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#
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attr_writer :name
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#
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# Whether or not this is an advanced option.
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#
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attr_accessor :advanced
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#
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# Whether or not this is an evasion option.
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#
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attr_accessor :evasion
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#
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# The module or entity that owns this option.
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#
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attr_accessor :owner
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#
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# The list of potential valid values
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#
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attr_accessor :enums
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protected
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attr_writer :required, :desc, :default # :nodoc:
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end
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###
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#
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# Core option types. The core supported option types are:
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#
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# OptString - Multi-byte character string
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# OptRaw - Multi-byte raw string
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# OptBool - Boolean true or false indication
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# OptPort - TCP/UDP service port
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# OptAddress - IP address or hostname
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# OptPath - Path name on disk
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# OptInt - An integer value
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# OptEnum - Select from a set of valid values
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# OptAddressRange - A subnet or range of addresses
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# OptSession - A session identifier
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#
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###
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###
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#
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# Mult-byte character string option.
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#
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###
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class OptString < OptBase
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def type
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return 'string'
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end
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def normalize(value)
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if (value =~ /^file:(.*)/)
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path = $1
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begin
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value = File.read(path)
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rescue ::Errno::ENOENT, ::Errno::EISDIR
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value = nil
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end
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end
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value
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end
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def valid?(value=self.value)
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value = normalize(value)
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return false if empty_required_value?(value)
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return super
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end
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end
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###
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#
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# Raw, arbitrary data option.
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#
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###
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class OptRaw < OptBase
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def type
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return 'raw'
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end
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def normalize(value)
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if (value =~ /^file:(.*)/)
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path = $1
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begin
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value = File.read(path)
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rescue ::Errno::ENOENT, ::Errno::EISDIR
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value = nil
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end
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end
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value
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end
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def valid?(value=self.value)
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value = normalize(value)
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return false if empty_required_value?(value)
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return super
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end
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end
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###
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#
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# Boolean option.
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#
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###
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class OptBool < OptBase
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TrueRegex = /^(y|yes|t|1|true)$/i
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def type
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return 'bool'
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end
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def valid?(value)
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return false if empty_required_value?(value)
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if ((value != nil and
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(value.to_s.empty? == false) and
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(value.to_s.match(/^(y|yes|n|no|t|f|0|1|true|false)$/i) == nil)))
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return false
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end
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true
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end
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def normalize(value)
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if(value.nil? or value.to_s.match(TrueRegex).nil?)
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false
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else
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true
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end
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end
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def is_true?(value)
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return normalize(value)
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end
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def is_false?(value)
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return !is_true?(value)
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end
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end
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###
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#
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# Enum option.
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#
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###
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class OptEnum < OptBase
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def type
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return 'enum'
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end
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def valid?(value=self.value)
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return false if empty_required_value?(value)
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(value and self.enums.include?(value.to_s))
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end
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def normalize(value=self.value)
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return nil if not self.valid?(value)
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return value.to_s
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end
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def desc=(value)
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self.desc_string = value
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self.desc
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end
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def desc
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if self.enums
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str = self.enums.join(', ')
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end
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"#{self.desc_string || ''} (accepted: #{str})"
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end
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protected
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attr_accessor :desc_string # :nodoc:
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end
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###
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#
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# Network port option.
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#
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###
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class OptPort < OptBase
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def type
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return 'port'
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end
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def valid?(value)
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return false if empty_required_value?(value)
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if ((value != nil and value.to_s.empty? == false) and
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((value.to_s.match(/^\d+$/) == nil or value.to_i < 0 or value.to_i > 65535)))
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return false
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end
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return super
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end
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end
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###
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#
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# Network address option.
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#
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###
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class OptAddress < OptBase
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def type
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return 'address'
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end
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def valid?(value)
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return false if empty_required_value?(value)
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if (value != nil and value.empty? == false)
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begin
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::Rex::Socket.getaddress(value)
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rescue
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return false
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end
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end
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return super
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end
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end
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###
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#
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# Network address range option.
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#
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###
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class OptAddressRange < OptBase
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def type
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return 'addressrange'
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end
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def normalize(value)
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if (value =~ /^file:(.*)/)
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path = $1
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return false if not File.exists?(path) or File.directory?(path)
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return File.readlines(path).map{ |s| s.strip}.join(" ")
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elsif (value =~ /^rand:(.*)/)
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count = $1.to_i
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return false if count < 1
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ret = ''
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count.times {
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ret << " " if not ret.empty?
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ip = "%u.%u.%u.%u" % [1+rand(0xfe),1+rand(0xfe),1+rand(0xfe),1+rand(0xfe)]
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ret << ip
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}
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return ret
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end
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return value
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end
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def valid?(value)
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return false if empty_required_value?(value)
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if (value != nil and value.empty? == false)
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walker = Rex::Socket::RangeWalker.new(normalize(value))
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if (not walker or not walker.valid?)
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return false
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end
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end
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return super
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end
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end
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###
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#
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# File system path option.
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#
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###
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class OptPath < OptBase
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def type
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return 'path'
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end
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def valid?(value)
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return false if empty_required_value?(value)
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if ((value != nil and value.empty? == false) and
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(File.exists?(value) == false))
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return false
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end
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return super
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end
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end
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###
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#
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# Integer option.
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#
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###
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class OptInt < OptBase
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def type
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return 'integer'
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end
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def normalize(value)
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if (value.to_s.match(/^0x[a-fA-F\d]+$/))
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value.to_i(16)
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else
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value.to_i
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end
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end
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def valid?(value)
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return false if empty_required_value?(value)
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if value and not normalize(value).to_s.match(/^\d+$/)
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return false
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end
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return super
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end
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end
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###
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#
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# The options purpose in life is to associate named options
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# with arbitrary values at the most simplistic level. Each
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# module contains a OptionContainer that is used to hold the
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# various options that the module depends on. Example of options
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# that are stored in the OptionContainer are rhost and rport for
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# payloads or exploits that need to connect to a host and
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# port, for instance.
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#
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###
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class OptionContainer < Hash
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#
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# Merges in the supplied options and converts them to a OptBase
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# as necessary.
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#
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def initialize(opts = {})
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self.sorted = []
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add_options(opts)
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end
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#
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# Return the value associated with the supplied name.
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#
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def [](name)
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return get(name)
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end
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#
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# Return the option associated with the supplied name.
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#
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def get(name)
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begin
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return fetch(name)
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rescue
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end
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end
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#
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# Returns whether or not the container has any options,
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# excluding advanced (and evasions).
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#
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def has_options?
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each_option { |name, opt|
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return true if (opt.advanced? == false)
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}
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return false
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end
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#
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# Returns whether or not the container has any advanced
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# options.
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#
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def has_advanced_options?
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each_option { |name, opt|
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return true if (opt.advanced? == true)
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}
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return false
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end
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#
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# Returns whether or not the container has any evasion
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# options.
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#
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def has_evasion_options?
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each_option { |name, opt|
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return true if (opt.evasion? == true)
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}
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return false
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end
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#
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# Removes an option.
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#
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def remove_option(name)
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delete(name)
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sorted.each_with_index { |e, idx|
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sorted[idx] = nil if (e[0] == name)
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}
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sorted.delete(nil)
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end
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#
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# Adds one or more options.
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#
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def add_options(opts, owner = nil, advanced = false, evasion = false)
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return false if (opts == nil)
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if (opts.kind_of?(Array))
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add_options_array(opts, owner, advanced, evasion)
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else
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add_options_hash(opts, owner, advanced, evasion)
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end
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end
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#
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# Add options from a hash of names.
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#
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def add_options_hash(opts, owner = nil, advanced = false, evasion = false)
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opts.each_pair { |name, opt|
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add_option(opt, name, owner, advanced, evasion)
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}
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end
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#
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# Add options from an array of option instances or arrays.
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#
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def add_options_array(opts, owner = nil, advanced = false, evasion = false)
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opts.each { |opt|
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add_option(opt, nil, owner, advanced, evasion)
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}
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end
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#
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# Adds an option.
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#
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def add_option(option, name = nil, owner = nil, advanced = false, evasion = false)
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if (option.kind_of?(Array))
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option = option.shift.new(name, option)
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elsif (!option.kind_of?(OptBase))
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raise ArgumentError,
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"The option named #{name} did not come in a compatible format.",
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caller
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end
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option.advanced = advanced
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option.evasion = evasion
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option.owner = owner
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self.store(option.name, option)
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# Re-calculate the sorted list
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self.sorted = self.sort
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end
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#
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# Alias to add advanced options that sets the proper state flag.
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#
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def add_advanced_options(opts, owner = nil)
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return false if (opts == nil)
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add_options(opts, owner, true)
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end
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#
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# Alias to add evasion options that sets the proper state flag.
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#
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def add_evasion_options(opts, owner = nil)
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return false if (opts == nil)
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add_options(opts, owner, false, true)
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end
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#
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# Make sures that each of the options has a value of a compatible
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# format and that all the required options are set.
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#
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def validate(datastore)
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errors = []
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each_pair { |name, option|
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if (!option.valid?(datastore[name]))
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errors << name
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# If the option is valid, normalize its format to the correct type.
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elsif ((val = option.normalize(datastore[name])) != nil)
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datastore.update_value(name, val)
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end
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}
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if (errors.empty? == false)
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raise OptionValidateError.new(errors),
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"One or more options failed to validate", caller
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end
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return true
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end
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#
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# Creates string of options that were used from the datastore in VAR=VAL
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# format separated by commas.
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#
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def options_used_to_s(datastore)
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used = ''
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each_pair { |name, option|
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next if (datastore[name] == nil)
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used += ", " if (used.length > 0)
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used += "#{name}=#{datastore[name]}"
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}
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return used
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end
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#
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# Enumerates each option name
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#
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def each_option(&block)
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each_pair(&block)
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end
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#
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# Merges the options in this container with another option container and
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# returns the sorted results.
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#
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def merge_sort(other_container)
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result = self.dup
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other_container.each { |name, opt|
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if (result.get(name) == nil)
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result[name] = opt
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end
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}
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result.sort
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end
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#
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# The sorted array of options.
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#
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attr_reader :sorted
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protected
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attr_writer :sorted # :nodoc:
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end
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#
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# Builtin framework options with shortcut methods
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#
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module Opt
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@@builtin_opts =
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{
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'RHOST' => [ OptAddress, 'nil', true, '"The target address"' ],
|
|
'RPORT' => [ OptPort, 'nil', true, '"The target port"' ],
|
|
'LHOST' => [ OptAddress, 'nil', true, '"The listen address"' ],
|
|
'LPORT' => [ OptPort, 'nil', true, '"The listen port"' ],
|
|
'CPORT' => [ OptPort, 'nil', false, '"The local client port"' ],
|
|
'CHOST' => [ OptAddress, 'nil', false, '"The local client address"' ],
|
|
'Proxies' => [ OptString, 'nil', 'false', '"Use a proxy chain"']
|
|
}
|
|
|
|
#
|
|
# Build the builtin_xyz methods on the fly using the type information for each
|
|
# of the builtin framework options, such as RHOST.
|
|
#
|
|
class <<self
|
|
@@builtin_opts.each_pair { |opt, info|
|
|
eval(
|
|
"
|
|
def builtin_#{opt.downcase}(default = #{info[1]}, required = #{info[2]}, desc = #{info[3]})
|
|
#{info[0]}.new('#{opt}', [ required, desc, default ])
|
|
end
|
|
|
|
alias #{opt} builtin_#{opt.downcase}
|
|
")
|
|
}
|
|
end
|
|
|
|
#
|
|
# Define the constant versions of the options which are merely redirections to
|
|
# the class methods.
|
|
#
|
|
@@builtin_opts.each_pair { |opt, info|
|
|
eval("#{opt} = Msf::Opt::builtin_#{opt.downcase}")
|
|
}
|
|
|
|
end
|
|
|
|
end
|
|
|