smime_env.rb

module MrSmime
  class Certificate
    def present?
      ENV[certificate_path].present?
    end

    def certificate
      X509::Certificate.new(ENV[certificate_path])
    end

    def certificate_path
      "SMIME_#{filename(:pem)}"
    end

    def ca_bundles
      pem_header = '-----BEGIN CERTIFICATE-----'
      # drop(2): blank item, original certificate
      ENV[certificate_path].split(pem_header).drop(2).map { |cert|
        X509::Certificate.new(pem_header + cert)
      }
    end

    def private_key
      PKey::RSA.new(ENV[private_key_path])
    end

    def private_key_path
      "SMIME_#{filename(:key)}"
    end

    def filename(extension)
      Certificate.filename(@email, extension)
    end
  end
end