Gem::Package#verify

# File tmp/rubies/ruby-3.1.3/lib/rubygems/package.rb, line 605
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.message
rescue Gem::Package::TarInvalidError => e
  raise Gem::Package::FormatError.new e.message, @gem
end