startTls method

Upgrades the current insure connection to SSL.

Opportunistic TLS (Transport Layer Security) refers to extensions in plain text communication protocols, which offer a way to upgrade a plain text connection to an encrypted (TLS or SSL) connection instead of using a separate port for encrypted communication.

Implementation

Future<GenericImapResult> startTls() async {
  final cmd = Command('STARTTLS');
  final response = await sendCommand<GenericImapResult>(
      cmd, GenericParser(this, _selectedMailbox));
  log('STARTTL: upgrading socket to secure one...', initial: 'A');
  await upradeToSslSocket();
  return response;
}