Gem::Package#verify_entry

# File tmp/rubies/ruby-3.2.0/lib/rubygems/package.rb, line 655
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
  warn "Exception while verifying #{@gem.path}"
  raise
end