certificates_matching

# File lib/rubygems/commands/cert_command.rb, line 167
  def certificates_matching filter
    return enum_for __method__, filter unless block_given?

    Gem::Security.trusted_certificates.select do |certificate, _|
      subject = certificate.subject.to_s
      subject.downcase.index filter
    end.sort_by do |certificate, _|
      certificate.subject.to_a.map { |name, data,| [name, data] }
    end.each do |certificate, path|
      yield certificate, path
    end
  end