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ruby--ruby/lib/rubygems/safe_yaml.rb
David Rodríguez 88e46cf6b8
[rubygems/rubygems] Remove all syck traces from rubygems
After reading [this blog
post](https://blog.rubygems.org/2011/08/31/shaving-the-yaml-yak.html),
published almost 10 years ago already, my understanding is that this
problem could come up in two ways:

* Rubygems.org serving corrupted gemspecs". As far as I understand this
was fixed in rubygems.org a lot time ago, since
https://github.com/rubygems/rubygems.org/pull/331.

* Clients having a ten years old gemspec cache with some of these bad
gemspecs. In this case, there's no easy solution but I think ten years
is enough and rebuilding the cache should do the trick.

So, I think it's time we remove this.

https://github.com/rubygems/rubygems/commit/afcb15d556
2021-07-27 09:25:56 +09:00

57 lines
1.5 KiB
Ruby

module Gem
###
# This module is used for safely loading YAML specs from a gem. The
# `safe_load` method defined on this module is specifically designed for
# loading Gem specifications. For loading other YAML safely, please see
# Psych.safe_load
module SafeYAML
PERMITTED_CLASSES = %w[
Symbol
Time
Date
Gem::Dependency
Gem::Platform
Gem::Requirement
Gem::Specification
Gem::Version
Gem::Version::Requirement
].freeze
PERMITTED_SYMBOLS = %w[
development
runtime
].freeze
if ::YAML.respond_to? :safe_load
def self.safe_load(input)
if Gem::Version.new(Psych::VERSION) >= Gem::Version.new('3.1.0.pre1')
::YAML.safe_load(input, permitted_classes: PERMITTED_CLASSES, permitted_symbols: PERMITTED_SYMBOLS, aliases: true)
else
::YAML.safe_load(input, PERMITTED_CLASSES, PERMITTED_SYMBOLS, true)
end
end
def self.load(input)
if Gem::Version.new(Psych::VERSION) >= Gem::Version.new('3.1.0.pre1')
::YAML.safe_load(input, permitted_classes: [::Symbol])
else
::YAML.safe_load(input, [::Symbol])
end
end
else
unless Gem::Deprecate.skip
warn "YAML safe loading is not available. Please upgrade psych to a version that supports safe loading (>= 2.0)."
end
def self.safe_load(input, *args)
::YAML.load input
end
def self.load(input)
::YAML.load input
end
end
end
end