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EDIT :: safe_marshal.rb

# frozen_string_literal: true require "stringio" require_relative "safe_marshal/reader" require_relative "safe_marshal/visitors/to_ruby" module Gem ### # This module is used for safely loading Marshal specs from a gem. The # `safe_load` method defined on this module is specifically designed for # loading Gem specifications. module SafeMarshal PERMITTED_CLASSES = %w[ Date Time Rational Gem::Dependency Gem::NameTuple Gem::Platform Gem::Requirement Gem::Specification Gem::Version Gem::Version::Requirement YAML::Syck::DefaultKey YAML::PrivateType ].freeze private_constant :PERMITTED_CLASSES PERMITTED_SYMBOLS = %w[ development runtime name number platform dependencies ].freeze private_constant :PERMITTED_SYMBOLS PERMITTED_IVARS = { "String" => %w[E encoding @taguri @debug_created_info], "Time" => %w[ offset zone nano_num nano_den submicro @_zone @marshal_with_utc_coercion ], "Gem::Dependency" => %w[ @name @requirement @prerelease @version_requirement @version_requirements @type @force_ruby_platform ], "Gem::NameTuple" => %w[@name @version @platform], "Gem::Platform" => %w[@os @cpu @version], "Psych::PrivateType" => %w[@value @type_id], }.freeze private_constant :PERMITTED_IVARS def self.safe_load(input) load(input, permitted_classes: PERMITTED_CLASSES, permitted_symbols: PERMITTED_SYMBOLS, permitted_ivars: PERMITTED_IVARS) end def self.load(input, permitted_classes: [::Symbol], permitted_symbols: [], permitted_ivars: {}) root = Reader.new(StringIO.new(input, "r").binmode).read! Visitors::ToRuby.new( permitted_classes: permitted_classes, permitted_symbols: permitted_symbols, permitted_ivars: permitted_ivars, ).visit(root) end end end

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