Class: Msf::OptionContainer

Inherits:
Hash
  • Object
show all
Defined in:
lib/msf/core/option_container.rb

Overview

The options purpose in life is to associate named options with arbitrary values at the most simplistic level. Each Module contains an OptionContainer that is used to hold the various options that the module depends on. Example of options that are stored in the OptionContainer are rhost and rport for payloads or exploits that need to connect to a host and port, for instance.

The core supported option types are:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ OptionContainer

Merges in the supplied options and converts them to a OptBase as necessary.


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# File 'lib/msf/core/option_container.rb', line 50

def initialize(opts = {})
  self.sorted = []

  add_options(opts)
end

Instance Attribute Details

#sorted ⇒ Object

The sorted array of options.


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# File 'lib/msf/core/option_container.rb', line 313

def sorted
  @sorted
end

Instance Method Details

#[](name) ⇒ Object

Return the value associated with the supplied name.


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# File 'lib/msf/core/option_container.rb', line 59

def [](name)
  return get(name)
end

#add_advanced_options(opts, owner = nil) ⇒ Object

Alias to add advanced options that sets the proper state flag.


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# File 'lib/msf/core/option_container.rb', line 177

def add_advanced_options(opts, owner = nil)
  return false if (opts == nil)

  add_options(opts, owner, true)
end

#add_evasion_options(opts, owner = nil) ⇒ Object

Alias to add evasion options that sets the proper state flag.


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# File 'lib/msf/core/option_container.rb', line 186

def add_evasion_options(opts, owner = nil)
  return false if (opts == nil)

  add_options(opts, owner, false, true)
end

#add_option(option, name = nil, owner = nil, advanced = false, evasion = false) ⇒ Object

Adds an option.


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# File 'lib/msf/core/option_container.rb', line 155

def add_option(option, name = nil, owner = nil, advanced = false, evasion = false)
  if option.kind_of?(Array)
    option = option.shift.new(name, option)
  elsif !option.kind_of?(OptBase)
    raise ArgumentError,
      "The option named #{name} did not come in a compatible format.",
      caller
  end

  option.advanced = advanced
  option.evasion  = evasion
  option.owner    = owner

  self.store(option.name, option)

  # Re-calculate the sorted list
  self.sorted = self.sort
end

#add_options(opts, owner = nil, advanced = false, evasion = false) ⇒ Object

Adds one or more options.


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# File 'lib/msf/core/option_container.rb', line 124

def add_options(opts, owner = nil, advanced = false, evasion = false)
  return false if (opts == nil)

  if opts.kind_of?(Array)
    add_options_array(opts, owner, advanced, evasion)
  else
    add_options_hash(opts, owner, advanced, evasion)
  end
end

#add_options_array(opts, owner = nil, advanced = false, evasion = false) ⇒ Object

Add options from an array of option instances or arrays.


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# File 'lib/msf/core/option_container.rb', line 146

def add_options_array(opts, owner = nil, advanced = false, evasion = false)
  opts.each { |opt|
    add_option(opt, nil, owner, advanced, evasion)
  }
end

#add_options_hash(opts, owner = nil, advanced = false, evasion = false) ⇒ Object

Add options from a hash of names.


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# File 'lib/msf/core/option_container.rb', line 137

def add_options_hash(opts, owner = nil, advanced = false, evasion = false)
  opts.each_pair { |name, opt|
    add_option(opt, name, owner, advanced, evasion)
  }
end

#each(&block) ⇒ Object

Overrides the builtin 'each' operator to avoid the following exception on Ruby 1.9.2+

"can't add a new key into hash during iteration"


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# File 'lib/msf/core/option_container.rb', line 286

def each(&block)
  list = []
  self.keys.sort.each do |sidx|
    list << [sidx, self[sidx]]
  end
  list.each(&block)
end

#each_option(&block) ⇒ Object

Enumerates each option name


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# File 'lib/msf/core/option_container.rb', line 278

def each_option(&block)
  each_pair(&block)
end

#get(name) ⇒ Object

Return the option associated with the supplied name.


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# File 'lib/msf/core/option_container.rb', line 66

def get(name)
  begin
    return fetch(name)
  rescue
  end
end

#has_advanced_options? ⇒ Boolean

Returns whether or not the container has any advanced options.

Returns:

  • (Boolean) 

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# File 'lib/msf/core/option_container.rb', line 90

def has_advanced_options?
  each_option { |name, opt|
    return true if (opt.advanced? == true)
  }

  return false
end

#has_evasion_options? ⇒ Boolean

Returns whether or not the container has any evasion options.

Returns:

  • (Boolean) 

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# File 'lib/msf/core/option_container.rb', line 102

def has_evasion_options?
  each_option { |name, opt|
    return true if (opt.evasion? == true)
  }

  return false
end

#has_options? ⇒ Boolean

Returns whether or not the container has any options, excluding advanced (and evasions).

Returns:

  • (Boolean) 

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# File 'lib/msf/core/option_container.rb', line 77

def has_options?
  each_option { |name, opt|
    return true if (opt.advanced? == false)

  }

  return false
end

#merge_sort(other_container) ⇒ Object

Merges the options in this container with another option container and returns the sorted results.


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# File 'lib/msf/core/option_container.rb', line 298

def merge_sort(other_container)
  result = self.dup

  other_container.each { |name, opt|
    if (result.get(name) == nil)
      result[name] = opt
    end
  }

  result.sort
end

#options_used_to_s(datastore) ⇒ Object

Creates string of options that were used from the datastore in VAR=VAL format separated by commas.


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# File 'lib/msf/core/option_container.rb', line 262

def options_used_to_s(datastore)
  used = ''

  each_pair { |name, option|
    next if (datastore[name] == nil)

    used += ", " if (used.length > 0)
    used += "#{name}=#{datastore[name]}"
  }

  return used
end

#remove_option(name) ⇒ Object

Removes an option.


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# File 'lib/msf/core/option_container.rb', line 113

def remove_option(name)
  delete(name)
  sorted.each_with_index { |e, idx|
    sorted[idx] = nil if (e[0] == name)
  }
  sorted.delete(nil)
end

#validate(datastore) ⇒ Object

Make sures that each of the options has a value of a compatible format and that all the required options are set.


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# File 'lib/msf/core/option_container.rb', line 195

def validate(datastore)
  # First mutate the datastore and normalize all valid values before validating permutations of RHOST/etc.
  each_pair do |name, option|
    if option.valid?(datastore[name]) && (val = option.normalize(datastore[name])) != nil
      # This *will* result in a module that previously used the
      # global datastore to have its local datastore set, which
      # means that changing the global datastore and re-running
      # the same module will now use the newly-normalized local
      # datastore value instead. This is mostly mitigated by
      # forcing a clone through mod.replicant, but can break
      # things in corner cases.
      datastore[name] = val
    end
  end

  # Validate all permutations of rhost combinations
  if include?('RHOSTS') && !(datastore['RHOSTS'].blank? && !self['RHOSTS'].required)
    error_options = Set.new
    error_reasons = Hash.new do |hash, key|
      hash[key] = []
    end
    rhosts_walker = Msf::RhostsWalker.new(datastore['RHOSTS'], datastore)
    rhosts_count = rhosts_walker.count
    unless rhosts_walker.valid?
      invalid_values = rhosts_walker.to_enum(:errors).take(5).map(&:value)
      error_options << 'RHOSTS'
      if invalid_values.any?
        error_reasons['RHOSTS'] << "unexpected values: #{invalid_values.join(', ')}"
      end
    end

    rhosts_walker.each do |datastore|
      each_pair do |name, option|
        unless option.valid?(datastore[name])
          error_options << name
          if rhosts_count > 1
            error_reasons[name] << "for rhosts value #{datastore['UNPARSED_RHOSTS']}"
          end
        end
      end
    end

    unless error_options.empty?
      raise Msf::OptionValidateError.new(error_options.to_a, reasons: error_reasons),
            "One or more options failed to validate: #{error_options.to_a.join(', ')}."
    end
  else
    error_options = []
    each_pair do |name, option|
      unless option.valid?(datastore[name])
        error_options << name
      end
    end

    unless error_options.empty?
      raise Msf::OptionValidateError.new(error_options),
            "One or more options failed to validate: #{error_options.join(', ')}."
    end
  end

  true
end