717 lines
16 KiB
Ruby
717 lines
16 KiB
Ruby
require 'msf/core'
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module Msf
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###
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#
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# The module base class is responsible for providing the common interface
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# that is used to interact with modules at the most basic levels, such as
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# by inspecting a given module's attributes (name, dsecription, version,
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# authors, etc) and by managing the module's data store.
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#
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###
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class Module
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# Modules can subscribe to a user-interface, and as such they include the
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# UI subscriber module. This provides methods like print, print_line, etc.
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# User interfaces are designed to be medium independent, and as such the
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# user interface subscribes are designed to provide a flexible way of
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# interacting with the user, n stuff.
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include Rex::Ui::Subscriber
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# Make include public so we can runtime extend
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public_class_method :include
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class <<self
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include Framework::Offspring
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#
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# Class method to figure out what type of module this is
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#
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def type
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raise NotImplementedError
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end
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def fullname
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return type + '/' + refname
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end
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def shortname
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return refname.split('/')[-1]
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end
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#
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# Returns this module's ranking.
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#
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def rank
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(const_defined?('Rank')) ? const_get('Rank') : NormalRanking
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end
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#
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# Returns this module's ranking as a string representation.
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#
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def rank_to_s
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RankingName[rank]
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end
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#
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# The module's name that is assigned it it by the framework
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# or derived from the path that the module is loaded from.
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#
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attr_accessor :refname
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#
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# This attribute holds the non-duplicated copy of the module
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# implementation. This attribute is used for reloading purposes so that
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# it can be re-duplicated.
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#
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attr_accessor :orig_cls
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#
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# The path from which the module was loaded.
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#
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attr_accessor :file_path
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end
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#
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# Returns the class reference to the framework
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#
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def framework
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return self.class.framework
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end
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#
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# This method allows modules to tell the framework if they are usable
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# on the system that they are being loaded on in a generic fashion.
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# By default, all modules are indicated as being usable. An example of
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# where this is useful is if the module depends on something external to
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# ruby, such as a binary.
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#
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def self.is_usable
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true
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end
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require 'msf/core/module/author'
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require 'msf/core/module/platform_list'
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require 'msf/core/module/reference'
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require 'msf/core/module/target'
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require 'msf/core/module/auxiliary_action'
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#
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# Creates an instance of an abstract module using the supplied information
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# hash.
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#
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def initialize(info = {})
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self.module_info = info
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set_defaults
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# Initialize module compatibility hashes
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init_compat
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# Transform some of the fields to arrays as necessary
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self.author = Author.transform(module_info['Author'])
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self.arch = Rex::Transformer.transform(module_info['Arch'], Array,
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[ String ], 'Arch')
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self.platform = PlatformList.transform(module_info['Platform'])
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self.references = Rex::Transformer.transform(module_info['References'], Array,
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[ SiteReference, Reference ], 'Ref')
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# Create and initialize the option container for this module
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self.options = OptionContainer.new
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self.options.add_options(info['Options'], self.class)
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self.options.add_advanced_options(info['AdvancedOptions'], self.class)
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self.options.add_evasion_options(info['EvasionOptions'], self.class)
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# Create and initialize the data store for this module
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self.datastore = ModuleDataStore.new(self)
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self.datastore.import_options(self.options, 'self', true)
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# If there are default options, import their values into the datastore
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if (module_info['DefaultOptions'])
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self.datastore.import_options_from_hash(module_info['DefaultOptions'], true, 'self')
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end
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self.privileged = module_info['Privileged'] || false
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self.license = module_info['License'] || MSF_LICENSE
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end
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#
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# Returns the module's framework full reference name. This is the
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# short name that end-users work with (refname) plus the type
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# of module prepended. Ex:
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#
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# payloads/windows/shell/reverse_tcp
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#
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def fullname
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return self.class.fullname
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end
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#
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# Returns the module's framework reference name. This is the
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# short name that end-users work with. Ex:
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#
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# windows/shell/reverse_tcp
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#
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def refname
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return self.class.refname
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end
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#
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# Returns the module's rank.
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#
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def rank
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return self.class.rank
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end
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#
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# Returns the module's framework short name. This is a
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# possibly conflicting name used for things like console
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# prompts.
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#
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# reverse_tcp
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#
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def shortname
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return self.class.shortname
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end
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#
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# Returns the unduplicated class associated with this module.
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#
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def orig_cls
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return self.class.orig_cls
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end
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#
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# The path to the file in which the module can be loaded from.
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#
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def file_path
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self.class.file_path
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end
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#
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# Return the module's name from the module information hash.
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#
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def name
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module_info['Name']
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end
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#
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# Returns the module's alias, if it has one. Otherwise, the module's
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# name is returned.
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#
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def alias
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module_info['Alias']
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end
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#
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# Return the module's description.
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#
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def description
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module_info['Description']
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end
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#
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# Return the module's version information.
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#
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def version
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module_info['Version']
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end
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#
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# Returns the hash that describes this module's compatibilities.
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#
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def compat
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module_info['Compat'] || {}
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end
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#
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# Returns whether or not this module is compatible with the supplied
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# module.
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#
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def compatible?(mod)
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ch = nil
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# Invalid module? Shoot, we can't compare that.
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return true if (mod == nil)
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# Determine which hash to used based on the supplied module type
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if (mod.type == MODULE_ENCODER)
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ch = self.compat['Encoder']
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elsif (mod.type == MODULE_NOP)
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ch = self.compat['Nop']
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elsif (mod.type == MODULE_PAYLOAD)
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ch = self.compat['Payload']
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else
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return true
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end
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# Enumerate each compatibility item in our hash to find out
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# if we're compatible with this sucker.
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ch.each_pair do |k,v|
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# Get the value of the current key from the module, such as
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# the ConnectionType for a stager (ws2ord, for instance).
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mval = mod.module_info[k]
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# Reject a filled compat item on one side, but not the other
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return false if (v and not mval)
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# Track how many of our values matched the module
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mcnt = 0
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# Values are whitespace separated
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sv = v.split(/\s+/)
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mv = mval.split(/\s+/)
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sv.each do |x|
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dlog("Checking compat [#{mod.refname} with #{self.refname}]: #{x} to #{mv.join(", ")}", 'core', LEV_3)
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# Verify that any negate values are not matched
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if (x[0].chr == '-' and mv.include?(x[1, x.length-1]))
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dlog("Module #{mod.refname} is incompatible with #{self.refname} for #{k}: limiter was #{x}, value was #{mval}", 'core', LEV_1)
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return false
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end
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mcnt += 1 if mv.include?(x)
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end
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# No values matched, reject this module
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if (mcnt == 0)
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dlog("Module #{mod.refname} is incompatible with #{self.refname} for #{k}: limiter was #{v}, value was #{mval}", 'core', LEV_1)
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return false
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end
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end
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# If we get here, we're compatible.
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return true
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end
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#
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# Return the module's abstract type.
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#
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def type
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raise NotImplementedError
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end
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#
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# Return a comma separated list of author for this module.
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#
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def author_to_s
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return author.collect { |author| author.to_s }.join(", ")
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end
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#
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# Enumerate each author.
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#
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def each_author(&block)
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author.each(&block)
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end
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#
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# Return a comma separated list of supported architectures, if any.
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#
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def arch_to_s
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return arch.join(", ")
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end
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#
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# Enumerate each architecture.
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#
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def each_arch(&block)
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arch.each(&block)
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end
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#
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# Return whether or not the module supports the supplied architecture.
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#
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def arch?(what)
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return true if (what == ARCH_ANY)
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return arch.index(what) != nil
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end
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#
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# Return a comma separated list of supported platforms, if any.
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#
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def platform_to_s
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return (platform.all?) ? [ "All" ] : platform.names
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end
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#
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# Returns whether or not the module requires or grants high privileges.
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#
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def privileged?
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return (privileged == true)
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end
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#
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# The default communication subsystem for this module. We may need to move
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# this somewhere else.
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#
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def comm
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return Rex::Socket::Comm::Local
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end
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#
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# Overrides the class' own datastore with the one supplied. This is used
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# to allow modules to share datastores, such as a payload sharing an
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# exploit module's datastore.
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#
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def share_datastore(ds)
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self.datastore = ds
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self.datastore.import_options(self.options)
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end
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#
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# This method ensures that the options associated with this module all
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# have valid values according to each required option in the option
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# container.
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#
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def validate
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self.options.validate(self.datastore)
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end
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##
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#
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# Just some handy quick checks
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#
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##
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#
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# Returns true if this module is an exploit module.
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#
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def exploit?
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return (type == MODULE_EXPLOIT)
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end
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#
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# Returns true if this module is a payload module.
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#
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def payload?
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return (type == MODULE_PAYLOAD)
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end
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#
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# Returns true if this module is an encoder module.
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#
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def encoder?
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return (type == MODULE_ENCODER)
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end
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#
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# Returns true if this module is a nop module.
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#
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def nop?
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return (type == MODULE_NOP)
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end
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#
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# Returns true if this module is an auxiliary module.
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#
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def auxiliary?
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return (type == MODULE_AUX)
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end
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#
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# The array of zero or more authors.
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#
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attr_reader :author
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#
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# The array of zero or more architectures.
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#
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attr_reader :arch
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#
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# The array of zero or more platforms.
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#
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attr_reader :platform
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#
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# The reference count for the module.
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#
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attr_reader :references
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#
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# The module-specific datastore instance.
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#
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attr_reader :datastore
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#
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# The module-specific options.
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#
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attr_reader :options
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#
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# Whether or not this module requires privileged access.
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#
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attr_reader :privileged
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#
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# The license under which this module is provided.
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#
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attr_reader :license
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protected
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#
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# The list of options that support merging in an information hash.
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#
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UpdateableOptions = [ "Name", "Description", "Alias" ]
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#
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# Sets the modules unsupplied info fields to their default values.
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#
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def set_defaults
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self.module_info = {
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'Name' => 'No module name',
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'Description' => 'No module description',
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'Version' => '0',
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'Author' => nil,
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'Arch' => nil, # No architectures by default.
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'Platform' => [], # No platforms by default.
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'Ref' => nil,
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'Privileged' => false,
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'License' => MSF_LICENSE,
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}.update(self.module_info)
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end
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#
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# This method initializes the module's compatibility hashes by normalizing
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# them into one single hash. As it stands, modules can define
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# compatibility in their supplied info hash through:
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#
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# Compat - direct compat definitions
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# PayloadCompat - payload compatibilities
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# EncoderCompat - encoder compatibilities
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# NopCompat - nop compatibilities
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#
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# In the end, the module specific compatibilities are merged as sub-hashes
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# of the primary Compat hash key to make checks more uniform.
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#
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def init_compat
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c = module_info['Compat']
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if (c == nil)
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c = module_info['Compat'] = Hash.new
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end
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# Initialize the module sub compatibilities
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c['Payload'] = Hash.new if (c['Payload'] == nil)
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c['Encoder'] = Hash.new if (c['Encoder'] == nil)
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c['Nop'] = Hash.new if (c['Nop'] == nil)
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# Update the compat-derived module specific compatibilities from
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# the specific ones to make a uniform view of compatibilities
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c['Payload'].update(module_info['PayloadCompat'] || {})
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c['Encoder'].update(module_info['EncoderCompat'] || {})
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c['Nop'].update(module_info['NopCompat'] || {})
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end
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#
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# Register options with a specific owning class.
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#
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def register_options(options, owner = self.class)
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self.options.add_options(options, owner)
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self.datastore.import_options(self.options, 'self', true)
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end
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#
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# Register advanced options with a specific owning class.
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#
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def register_advanced_options(options, owner = self.class)
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self.options.add_advanced_options(options, owner)
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self.datastore.import_options(self.options, 'self', true)
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end
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#
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# Register evasion options with a specific owning class.
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#
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def register_evasion_options(options, owner = self.class)
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self.options.add_evasion_options(options, owner)
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self.datastore.import_options(self.options, 'self', true)
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end
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#
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# Removes the supplied options from the module's option container
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# and data store.
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#
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def deregister_options(*names)
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names.each { |name|
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self.options.remove_option(name)
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self.datastore.delete(name)
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}
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end
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#
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# Checks to see if a derived instance of a given module implements a method
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# beyond the one that is provided by a base class. This is a pretty lame
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# way of doing it, but I couldn't find a better one, so meh.
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#
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def derived_implementor?(parent, method_name)
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(self.method(method_name).to_s.match(/#{parent.to_s}[^:]/)) ? false : true
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end
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#
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# Merges options in the info hash in a sane fashion, as some options
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# require special attention.
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#
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def merge_info(info, opts)
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opts.each_pair { |name, val|
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merge_check_key(info, name, val)
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}
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return info
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end
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#
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# Updates information in the supplied info hash and merges other
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# information. This method is used to override things like Name, Version,
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# and Description without losing the ability to merge architectures,
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# platforms, and options.
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#
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def update_info(info, opts)
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opts.each_pair { |name, val|
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# If the supplied option name is one of the ones that we should
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# override by default
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if (UpdateableOptions.include?(name) == true)
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# Only if the entry is currently nil do we use our value
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if (info[name] == nil)
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info[name] = val
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end
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# Otherwise, perform the merge operation like normal
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else
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merge_check_key(info, name, val)
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end
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}
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return info
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end
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#
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# Checks and merges the supplied key/value pair in the supplied hash.
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#
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def merge_check_key(info, name, val)
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if (self.respond_to?("merge_info_#{name.downcase}"))
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eval("merge_info_#{name.downcase}(info, val)")
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else
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# If the info hash already has an entry for this name
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if (info[name])
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# If it's not an array, convert it to an array and merge the
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# two
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if (info[name].kind_of?(Array) == false)
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curr = info[name]
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info[name] = [ curr ]
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end
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# If the value being merged is an array, add each one
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if (val.kind_of?(Array) == true)
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|
val.each { |v|
|
|
if (info[name].include?(v) == false)
|
|
info[name] << v
|
|
end
|
|
}
|
|
# Otherwise just add the value
|
|
elsif (info[name].include?(val) == false)
|
|
info[name] << val
|
|
end
|
|
# Otherwise, just set the value equal if no current value
|
|
# exists
|
|
else
|
|
info[name] = val
|
|
end
|
|
end
|
|
end
|
|
|
|
#
|
|
# Merge aliases with an underscore delimiter.
|
|
#
|
|
def merge_info_alias(info, val)
|
|
merge_info_string(info, 'Alias', val, '_')
|
|
end
|
|
|
|
#
|
|
# Merges the module name.
|
|
#
|
|
def merge_info_name(info, val)
|
|
merge_info_string(info, 'Name', val, ', ', true)
|
|
end
|
|
|
|
#
|
|
# Merges the module description.
|
|
#
|
|
def merge_info_description(info, val)
|
|
merge_info_string(info, 'Description', val)
|
|
end
|
|
|
|
#
|
|
# Merge the module version.
|
|
#
|
|
def merge_info_version(info, val)
|
|
merge_info_string(info, 'Version', val)
|
|
end
|
|
|
|
#
|
|
# Merges a given key in the info hash with a delimiter.
|
|
#
|
|
def merge_info_string(info, key, val, delim = ', ', inverse = false)
|
|
if (info[key])
|
|
if (inverse == true)
|
|
info[key] = info[key] + delim + val
|
|
else
|
|
info[key] = val + delim + info[key]
|
|
end
|
|
else
|
|
info[key] = val
|
|
end
|
|
end
|
|
|
|
#
|
|
# Merges options.
|
|
#
|
|
def merge_info_options(info, val, advanced = false, evasion = false)
|
|
|
|
key_name = ((advanced) ? 'Advanced' : (evasion) ? 'Evasion' : '') + 'Options'
|
|
|
|
new_cont = OptionContainer.new
|
|
new_cont.add_options(val, advanced, evasion)
|
|
cur_cont = OptionContainer.new
|
|
cur_cont.add_options(info[key_name] || [], advanced, evasion)
|
|
|
|
new_cont.each_option { |name, option|
|
|
next if (cur_cont.get(name))
|
|
|
|
info[key_name] = [] if (!info[key_name])
|
|
info[key_name] << option
|
|
}
|
|
end
|
|
|
|
#
|
|
# Merges advanced options.
|
|
#
|
|
def merge_info_advanced_options(info, val)
|
|
merge_info_options(info, val, true, false)
|
|
end
|
|
|
|
#
|
|
# Merges advanced options.
|
|
#
|
|
def merge_info_evasion_options(info, val)
|
|
merge_info_options(info, val, false, true)
|
|
end
|
|
|
|
attr_accessor :module_info # :nodoc:
|
|
attr_writer :author, :arch, :platform, :references, :datastore, :options # :nodoc:
|
|
attr_writer :privileged # :nodoc:
|
|
attr_writer :license # :nodoc:
|
|
|
|
end
|
|
|
|
#
|
|
# Alias the data types so people can reference them just by Msf:: and not
|
|
# Msf::Module::
|
|
#
|
|
Author = Msf::Module::Author
|
|
Reference = Msf::Module::Reference
|
|
SiteReference = Msf::Module::SiteReference
|
|
Platform = Msf::Module::Platform
|
|
Target = Msf::Module::Target
|
|
|
|
end
|