}
            try (final InputStream in = new FileInputStream(authorities)) {
                final Certificate certificate = CertificateFactory.getInstance("X.509").generateCertificate(in);

                final KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
                keyStore.load(null, null);
                keyStore.setCertificateEntry("server", certificate);

          val bytes = Buffer()
          val certificateBytes = line.decodeBase64() ?: throw IOException("Corrupt certificate in cache entry")
          bytes.write(certificateBytes)
          result.add(certificateFactory.generateCertificate(bytes.inputStream()))
        }
        return result
      } catch (e: CertificateException) {
        throw IOException(e.message)
      }
    }

    @Throws(IOException::class)