mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
93 lines
3.4 KiB
Ruby
93 lines
3.4 KiB
Ruby
# frozen_string_literal: true
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require "rubygems/installer"
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module Bundler
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class RubyGemsGemInstaller < Gem::Installer
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def check_executable_overwrite(filename)
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# Bundler needs to install gems regardless of binstub overwriting
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end
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def pre_install_checks
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super && validate_bundler_checksum(options[:bundler_expected_checksum])
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end
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def build_extensions
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extension_cache_path = options[:bundler_extension_cache_path]
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return super unless extension_cache_path && extension_dir = spec.extension_dir
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extension_dir = Pathname.new(extension_dir)
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build_complete = SharedHelpers.filesystem_access(extension_cache_path.join("gem.build_complete"), :read, &:file?)
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if build_complete && !options[:force]
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SharedHelpers.filesystem_access(extension_dir.parent, &:mkpath)
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SharedHelpers.filesystem_access(extension_cache_path) do
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FileUtils.cp_r extension_cache_path, spec.extension_dir
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end
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else
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super
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if extension_dir.directory? # not made for gems without extensions
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SharedHelpers.filesystem_access(extension_cache_path.parent, &:mkpath)
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SharedHelpers.filesystem_access(extension_cache_path) do
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FileUtils.cp_r extension_dir, extension_cache_path
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end
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end
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end
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end
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private
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def validate_bundler_checksum(checksum)
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return true if Bundler.settings[:disable_checksum_validation]
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return true unless checksum
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return true unless source = @package.instance_variable_get(:@gem)
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return true unless source.respond_to?(:with_read_io)
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digest = source.with_read_io do |io|
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digest = SharedHelpers.digest(:SHA256).new
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digest << io.read(16_384) until io.eof?
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io.rewind
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send(checksum_type(checksum), digest)
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end
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unless digest == checksum
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raise SecurityError, <<-MESSAGE
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Bundler cannot continue installing #{spec.name} (#{spec.version}).
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The checksum for the downloaded `#{spec.full_name}.gem` does not match \
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the checksum given by the server. This means the contents of the downloaded \
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gem is different from what was uploaded to the server, and could be a potential security issue.
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To resolve this issue:
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1. delete the downloaded gem located at: `#{spec.gem_dir}/#{spec.full_name}.gem`
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2. run `bundle install`
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If you wish to continue installing the downloaded gem, and are certain it does not pose a \
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security issue despite the mismatching checksum, do the following:
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1. run `bundle config set disable_checksum_validation true` to turn off checksum verification
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2. run `bundle install`
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(More info: The expected SHA256 checksum was #{checksum.inspect}, but the \
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checksum for the downloaded gem was #{digest.inspect}.)
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MESSAGE
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end
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true
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end
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def checksum_type(checksum)
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case checksum.length
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when 64 then :hexdigest!
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when 44 then :base64digest!
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else raise InstallError, "The given checksum for #{spec.full_name} (#{checksum.inspect}) is not a valid SHA256 hexdigest nor base64digest"
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end
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end
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def hexdigest!(digest)
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digest.hexdigest!
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end
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def base64digest!(digest)
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if digest.respond_to?(:base64digest!)
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digest.base64digest!
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else
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[digest.digest!].pack("m0")
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end
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end
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end
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end
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