Class: Gem::Package
- Inherits:
-
Object
- Object
- Gem::Package
- Includes:
- UserInteraction
- Defined in:
- lib/rubygems/package.rb
Direct Known Subclasses
Defined Under Namespace
Classes: DigestIO, Error, FileSource, FormatError, IOSource, NonSeekableIO, Old, PathError, Source, TarHeader, TarInvalidError, TarReader, TarTestCase, TarWriter, TooLongFileName
Instance Attribute Summary collapse
-
#build_time ⇒ Object
:nodoc:.
-
#checksums ⇒ Object
readonly
Checksums for the contents of the package.
-
#data_mode ⇒ Object
Permission for other files.
-
#dir_mode ⇒ Object
Permission for directories.
-
#files ⇒ Object
readonly
The files in this package.
-
#prog_mode ⇒ Object
Permission for program files.
-
#security_policy ⇒ Object
The security policy used for verifying the contents of this package.
-
#spec ⇒ Object
The spec for this gem.
Class Method Summary collapse
- .build(spec, skip_validation = false, strict_validation = false, file_name = nil) ⇒ Object
-
.new(gem, security_policy = nil) ⇒ Object
Creates a new Gem::Package for the file at
gem
.
Instance Method Summary collapse
-
#add_checksums(tar) ⇒ Object
Adds a checksum for each entry in the gem to checksums.yaml.gz.
-
#add_contents(tar) ⇒ Object
Adds the files listed in the packages’s Gem::Specification to data.tar.gz and adds this file to the
tar
. -
#add_files(tar) ⇒ Object
Adds files included the package’s Gem::Specification to the
tar
file. -
#add_metadata(tar) ⇒ Object
Adds the package’s Gem::Specification to the
tar
file. -
#build(skip_validation = false, strict_validation = false) ⇒ Object
Builds this package based on the specification set by #spec=.
-
#contents ⇒ Object
A list of file names contained in this gem.
-
#copy_to(path) ⇒ Object
Copies this package to
path
(if possible). -
#digest(entry) ⇒ Object
Creates a digest of the TarEntry
entry
from the digest algorithm set by the security policy. -
#extract_files(destination_dir, pattern = "*") ⇒ Object
Extracts the files in this package into
destination_dir
. -
#extract_tar_gz(io, destination_dir, pattern = "*") ⇒ Object
Extracts all the files in the gzipped tar archive
io
intodestination_dir
. -
#file_mode(mode) ⇒ Object
:nodoc:.
-
#gzip_to(io) ⇒ Object
Gzips content written to
gz_io
toio
. -
#initialize(gem, security_policy) ⇒ Package
constructor
Creates a new package that will read or write to the file
gem
. -
#install_location(filename, destination_dir) ⇒ Object
Returns the full path for installing
filename
. -
#load_spec(entry) ⇒ Object
Loads a Gem::Specification from the TarEntry
entry
. - #mkdir_p_safe(mkdir, mkdir_options, destination_dir, file_name) ⇒ Object
- #normalize_path(pathname) ⇒ Object
-
#open_tar_gz(io) ⇒ Object
Opens
io
as a gzipped tar archive. -
#read_checksums(gem) ⇒ Object
Reads and loads checksums.yaml.gz from the tar file
gem
. -
#setup_signer(signer_options: {}) ⇒ Object
Prepares the gem for signing and checksum generation.
-
#verify ⇒ Object
Verifies that this gem:.
-
#verify_checksums(digests, checksums) ⇒ Object
Verifies the
checksums
against thedigests
. -
#verify_entry(entry) ⇒ Object
Verifies
entry
in a .gem file. -
#verify_files(gem) ⇒ Object
Verifies the files of the
gem
. -
#verify_gz(entry) ⇒ Object
Verifies that
entry
is a valid gzipped file.
Methods included from UserInteraction
#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction, #verbose
Methods included from DefaultUserInteraction
ui, #ui, ui=, #ui=, use_ui, #use_ui
Constructor Details
#initialize(gem, security_policy) ⇒ Package
Creates a new package that will read or write to the file gem
.
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# File 'lib/rubygems/package.rb', line 160 def initialize(gem, security_policy) # :notnew: @gem = gem @build_time = ENV["SOURCE_DATE_EPOCH"] ? Time.at(ENV["SOURCE_DATE_EPOCH"].to_i).utc : Time.now @checksums = {} @contents = nil @digests = Hash.new { |h, algorithm| h[algorithm] = {} } @files = nil @security_policy = security_policy @signatures = {} @signer = nil @spec = nil end |
Instance Attribute Details
#build_time ⇒ Object
:nodoc:
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# File 'lib/rubygems/package.rb', line 87 def build_time @build_time end |
#checksums ⇒ Object (readonly)
Checksums for the contents of the package
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# File 'lib/rubygems/package.rb', line 92 def checksums @checksums end |
#data_mode ⇒ Object
Permission for other files
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# File 'lib/rubygems/package.rb', line 120 def data_mode @data_mode end |
#dir_mode ⇒ Object
Permission for directories
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# File 'lib/rubygems/package.rb', line 112 def dir_mode @dir_mode end |
#files ⇒ Object (readonly)
The files in this package. This is not the contents of the gem, just the files in the top-level container.
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# File 'lib/rubygems/package.rb', line 98 def files @files end |
#prog_mode ⇒ Object
Permission for program files
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# File 'lib/rubygems/package.rb', line 116 def prog_mode @prog_mode end |
#security_policy ⇒ Object
The security policy used for verifying the contents of this package.
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# File 'lib/rubygems/package.rb', line 103 def security_policy @security_policy end |
#spec ⇒ Object
The spec for this gem.
If this is a package for a built gem the spec is loaded from the gem and returned. If this is a package for a gem being built the provided spec is returned.
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# File 'lib/rubygems/package.rb', line 560 def spec verify unless @spec @spec end |
Class Method Details
.build(spec, skip_validation = false, strict_validation = false, file_name = nil) ⇒ Object
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# File 'lib/rubygems/package.rb', line 122 def self.build(spec, skip_validation = false, strict_validation = false, file_name = nil) gem_file = file_name || spec.file_name package = new gem_file package.spec = spec package.build skip_validation, strict_validation gem_file end |
.new(gem, security_policy = nil) ⇒ Object
Creates a new Gem::Package for the file at gem
. gem
can also be provided as an IO object.
If gem
is an existing file in the old format a Gem::Package::Old will be returned.
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# File 'lib/rubygems/package.rb', line 139 def self.new(gem, security_policy = nil) gem = if gem.is_a?(Gem::Package::Source) gem elsif gem.respond_to? :read Gem::Package::IOSource.new gem else Gem::Package::FileSource.new gem end return super unless Gem::Package == self return super unless gem.present? return super unless gem.start return super unless gem.start.include? 'MD5SUM =' Gem::Package::Old.new gem end |
Instance Method Details
#add_checksums(tar) ⇒ Object
Adds a checksum for each entry in the gem to checksums.yaml.gz.
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# File 'lib/rubygems/package.rb', line 184 def add_checksums(tar) Gem.load_yaml checksums_by_algorithm = Hash.new { |h, algorithm| h[algorithm] = {} } @checksums.each do |name, digests| digests.each do |algorithm, digest| checksums_by_algorithm[algorithm][name] = digest.hexdigest end end tar.add_file_signed 'checksums.yaml.gz', 0444, @signer do |io| gzip_to io do |gz_io| YAML.dump checksums_by_algorithm, gz_io end end end |
#add_contents(tar) ⇒ Object
Adds the files listed in the packages’s Gem::Specification to data.tar.gz and adds this file to the tar
.
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# File 'lib/rubygems/package.rb', line 206 def add_contents(tar) # :nodoc: digests = tar.add_file_signed 'data.tar.gz', 0444, @signer do |io| gzip_to io do |gz_io| Gem::Package::TarWriter.new gz_io do |data_tar| add_files data_tar end end end @checksums['data.tar.gz'] = digests end |
#add_files(tar) ⇒ Object
Adds files included the package’s Gem::Specification to the tar
file
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# File 'lib/rubygems/package.rb', line 221 def add_files(tar) # :nodoc: @spec.files.each do |file| stat = File.lstat file if stat.symlink? target_path = File.readlink(file) unless target_path.start_with? '.' relative_dir = File.dirname(file).sub("#{Dir.pwd}/", '') target_path = File.join(relative_dir, target_path) end tar.add_symlink file, target_path, stat.mode end next unless stat.file? tar.add_file_simple file, stat.mode, stat.size do |dst_io| File.open file, 'rb' do |src_io| dst_io.write src_io.read 16384 until src_io.eof? end end end end |
#add_metadata(tar) ⇒ Object
Adds the package’s Gem::Specification to the tar
file
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# File 'lib/rubygems/package.rb', line 249 def (tar) # :nodoc: digests = tar.add_file_signed 'metadata.gz', 0444, @signer do |io| gzip_to io do |gz_io| gz_io.write @spec.to_yaml end end @checksums['metadata.gz'] = digests end |
#build(skip_validation = false, strict_validation = false) ⇒ Object
Builds this package based on the specification set by #spec=
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# File 'lib/rubygems/package.rb', line 262 def build(skip_validation = false, strict_validation = false) raise ArgumentError, "skip_validation = true and strict_validation = true are incompatible" if skip_validation && strict_validation Gem.load_yaml require 'rubygems/security' @spec.mark_version @spec.validate true, strict_validation unless skip_validation setup_signer( signer_options: { expiration_length_days: Gem.configuration.cert_expiration_length_days } ) @gem.with_write_io do |gem_io| Gem::Package::TarWriter.new gem_io do |gem| gem add_contents gem add_checksums gem end end say "Successfully built RubyGem\nName: \#{@spec.name}\nVersion: \#{@spec.version}\nFile: \#{File.basename @gem.path}\n" ensure @signer = nil end |
#contents ⇒ Object
A list of file names contained in this gem
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# File 'lib/rubygems/package.rb', line 298 def contents return @contents if @contents verify unless @spec @contents = [] @gem.with_read_io do |io| gem_tar = Gem::Package::TarReader.new io gem_tar.each do |entry| next unless entry.full_name == 'data.tar.gz' open_tar_gz entry do |pkg_tar| pkg_tar.each do |contents_entry| @contents << contents_entry.full_name end end return @contents end end end |
#copy_to(path) ⇒ Object
Copies this package to path
(if possible)
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# File 'lib/rubygems/package.rb', line 177 def copy_to(path) FileUtils.cp @gem.path, path unless File.exist? path end |
#digest(entry) ⇒ Object
Creates a digest of the TarEntry entry
from the digest algorithm set by the security policy.
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# File 'lib/rubygems/package.rb', line 326 def digest(entry) # :nodoc: algorithms = if @checksums @checksums.keys else [Gem::Security::DIGEST_NAME].compact end algorithms.each do |algorithm| digester = if defined?(OpenSSL::Digest) OpenSSL::Digest.new algorithm else Digest.const_get(algorithm).new end digester << entry.read(16384) until entry.eof? entry.rewind @digests[algorithm][entry.full_name] = digester end @digests end |
#extract_files(destination_dir, pattern = "*") ⇒ Object
Extracts the files in this package into destination_dir
If pattern
is specified, only entries matching that glob will be extracted.
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# File 'lib/rubygems/package.rb', line 357 def extract_files(destination_dir, pattern = "*") verify unless @spec FileUtils.mkdir_p destination_dir, :mode => dir_mode && 0755 @gem.with_read_io do |io| reader = Gem::Package::TarReader.new io reader.each do |entry| next unless entry.full_name == 'data.tar.gz' extract_tar_gz entry, destination_dir, pattern return # ignore further entries end end end |
#extract_tar_gz(io, destination_dir, pattern = "*") ⇒ Object
Extracts all the files in the gzipped tar archive io
into destination_dir
.
If an entry in the archive contains a relative path above destination_dir
or an absolute path is encountered an exception is raised.
If pattern
is specified, only entries matching that glob will be extracted.
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# File 'lib/rubygems/package.rb', line 386 def extract_tar_gz(io, destination_dir, pattern = "*") # :nodoc: directories = [] if dir_mode open_tar_gz io do |tar| tar.each do |entry| next unless File.fnmatch pattern, entry.full_name, File::FNM_DOTMATCH destination = install_location entry.full_name, destination_dir FileUtils.rm_rf destination = {} [:mode] = dir_mode ? 0755 : (entry.header.mode if entry.directory?) mkdir = if entry.directory? destination else File.dirname destination end directories << mkdir if directories mkdir_p_safe mkdir, , destination_dir, entry.full_name File.open destination, 'wb' do |out| out.write entry.read FileUtils.chmod file_mode(entry.header.mode), destination end if entry.file? File.symlink(entry.header.linkname, destination) if entry.symlink? verbose destination end end if directories directories.uniq! File.chmod(dir_mode, *directories) end end |
#file_mode(mode) ⇒ Object
:nodoc:
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# File 'lib/rubygems/package.rb', line 425 def file_mode(mode) # :nodoc: ((mode & 0111).zero? ? data_mode : prog_mode) || mode end |
#gzip_to(io) ⇒ Object
Gzips content written to gz_io
to io
. – Also sets the gzip modification time to the package build time to ease testing.
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# File 'lib/rubygems/package.rb', line 435 def gzip_to(io) # :yields: gz_io gz_io = Zlib::GzipWriter.new io, Zlib::BEST_COMPRESSION gz_io.mtime = @build_time yield gz_io ensure gz_io.close end |
#install_location(filename, destination_dir) ⇒ Object
Returns the full path for installing filename
.
If filename
is not inside destination_dir
an exception is raised.
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# File 'lib/rubygems/package.rb', line 449 def install_location(filename, destination_dir) # :nodoc: raise Gem::Package::PathError.new(filename, destination_dir) if filename.start_with? '/' destination_dir = File.(File.realpath(destination_dir)) destination = File.(File.join(destination_dir, filename)) raise Gem::Package::PathError.new(destination, destination_dir) unless destination.start_with? destination_dir + '/' destination.untaint destination end |
#load_spec(entry) ⇒ Object
Loads a Gem::Specification from the TarEntry entry
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# File 'lib/rubygems/package.rb', line 490 def load_spec(entry) # :nodoc: case entry.full_name when 'metadata' then @spec = Gem::Specification.from_yaml entry.read when 'metadata.gz' then args = [entry] args << { :external_encoding => Encoding::UTF_8 } if Zlib::GzipReader.method(:wrap).arity != 1 Zlib::GzipReader.wrap(*args) do |gzio| @spec = Gem::Specification.from_yaml gzio.read end end end |
#mkdir_p_safe(mkdir, mkdir_options, destination_dir, file_name) ⇒ Object
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# File 'lib/rubygems/package.rb', line 471 def mkdir_p_safe(mkdir, , destination_dir, file_name) destination_dir = File.realpath(File.(destination_dir)) parts = mkdir.split(File::SEPARATOR) parts.reduce do |path, basename| path = File.realpath(path) unless path == "" path = File.(path + File::SEPARATOR + basename) lstat = File.lstat path rescue nil if !lstat || !lstat.directory? unless normalize_path(path).start_with? normalize_path(destination_dir) and (FileUtils.mkdir path, rescue false) raise Gem::Package::PathError.new(file_name, destination_dir) end end path end end |
#normalize_path(pathname) ⇒ Object
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# File 'lib/rubygems/package.rb', line 463 def normalize_path(pathname) if Gem.win_platform? pathname.downcase else pathname end end |
#open_tar_gz(io) ⇒ Object
Opens io
as a gzipped tar archive
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# File 'lib/rubygems/package.rb', line 508 def open_tar_gz(io) # :nodoc: Zlib::GzipReader.wrap io do |gzio| tar = Gem::Package::TarReader.new gzio yield tar end end |
#read_checksums(gem) ⇒ Object
Reads and loads checksums.yaml.gz from the tar file gem
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# File 'lib/rubygems/package.rb', line 519 def read_checksums(gem) Gem.load_yaml @checksums = gem.seek 'checksums.yaml.gz' do |entry| Zlib::GzipReader.wrap entry do |gz_io| Gem::SafeYAML.safe_load gz_io.read end end end |
#setup_signer(signer_options: {}) ⇒ Object
Prepares the gem for signing and checksum generation. If a signing certificate and key are not present only checksum generation is set up.
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# File 'lib/rubygems/package.rb', line 533 def setup_signer(signer_options: {}) passphrase = ENV['GEM_PRIVATE_KEY_PASSPHRASE'] if @spec.signing_key @signer = Gem::Security::Signer.new( @spec.signing_key, @spec.cert_chain, passphrase, ) @spec.signing_key = nil @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_s } else @signer = Gem::Security::Signer.new nil, nil, passphrase @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_pem } if @signer.cert_chain end end |
#verify ⇒ Object
Verifies that this gem:
-
Contains a valid gem specification
-
Contains a contents archive
-
The contents archive is not corrupt
After verification the gem specification from the gem is available from #spec
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# File 'lib/rubygems/package.rb', line 576 def verify @files = [] @spec = nil @gem.with_read_io do |io| Gem::Package::TarReader.new io do |reader| read_checksums reader verify_files reader end end verify_checksums @digests, @checksums @security_policy.verify_signatures @spec, @digests, @signatures if @security_policy true rescue Gem::Security::Exception @spec = nil @files = [] raise rescue Errno::ENOENT => e raise Gem::Package::FormatError.new e. rescue Gem::Package::TarInvalidError => e raise Gem::Package::FormatError.new e., @gem end |
#verify_checksums(digests, checksums) ⇒ Object
Verifies the checksums
against the digests
. This check is not cryptographically secure. Missing checksums are ignored.
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# File 'lib/rubygems/package.rb', line 608 def verify_checksums(digests, checksums) # :nodoc: return unless checksums checksums.sort.each do |algorithm, gem_digests| gem_digests.sort.each do |file_name, gem_hexdigest| computed_digest = digests[algorithm][file_name] unless computed_digest.hexdigest == gem_hexdigest raise Gem::Package::FormatError.new \ "#{algorithm} checksum mismatch for #{file_name}", @gem end end end end |
#verify_entry(entry) ⇒ Object
Verifies entry
in a .gem file.
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# File 'lib/rubygems/package.rb', line 626 def verify_entry(entry) file_name = entry.full_name @files << file_name case file_name when /\.sig$/ then @signatures[$`] = entry.read if @security_policy return else digest entry end case file_name when "metadata", "metadata.gz" then load_spec entry when 'data.tar.gz' then verify_gz entry end rescue => e = "package is corrupt, exception while verifying: " + "#{e.message} (#{e.class})" raise Gem::Package::FormatError.new , @gem end |
#verify_files(gem) ⇒ Object
Verifies the files of the gem
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# File 'lib/rubygems/package.rb', line 653 def verify_files(gem) gem.each do |entry| verify_entry entry end unless @spec raise Gem::Package::FormatError.new 'package metadata is missing', @gem end unless @files.include? 'data.tar.gz' raise Gem::Package::FormatError.new \ 'package content (data.tar.gz) is missing', @gem end if duplicates = @files.group_by {|f| f }.select {|k,v| v.size > 1 }.map(&:first) and duplicates.any? raise Gem::Security::Exception, "duplicate files in the package: (#{duplicates.map(&:inspect).join(', ')})" end end |
#verify_gz(entry) ⇒ Object
Verifies that entry
is a valid gzipped file.
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# File 'lib/rubygems/package.rb', line 675 def verify_gz(entry) # :nodoc: Zlib::GzipReader.wrap entry do |gzio| gzio.read 16384 until gzio.eof? # gzip checksum verification end rescue Zlib::GzipFile::Error => e raise Gem::Package::FormatError.new(e., entry.full_name) end |