from datetime import datetime import re from leap.email.smtp.smtprelay import ( SMTPFactory, #SMTPDelivery, # an object EncryptedMessage, ) from leap.email.smtp import tests from twisted.test import proto_helpers from twisted.mail.smtp import User # some regexps IP_REGEX = "(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}" + \ "([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])" HOSTNAME_REGEX = "(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*" + \ "([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])" IP_OR_HOST_REGEX = '(' + IP_REGEX + '|' + HOSTNAME_REGEX + ')' class TestSmtpRelay(tests.OpenPGPTestCase): EMAIL_DATA = ['HELO relay.leap.se', 'MAIL FROM: ', 'RCPT TO: ', 'DATA', 'From: User ', 'To: Leap ', 'Date: ' + datetime.now().strftime('%c'), 'Subject: test message', '', 'This is a secret message.', 'Yours,', 'A.', '', '.', 'QUIT'] def assertMatch(self, string, pattern, msg=None): if not re.match(pattern, string): msg = self._formatMessage(msg, '"%s" does not match pattern "%s".' % (string, pattern)) raise self.failureException(msg) def test_relay_accepts_valid_email(self): """ Test if SMTP server responds correctly for valid interaction. """ SMTP_ANSWERS = ['220 ' + IP_OR_HOST_REGEX + ' NO UCE NO UBE NO RELAY PROBES', '250 ' + IP_OR_HOST_REGEX + ' Hello ' + IP_OR_HOST_REGEX + ', nice to meet you', '250 Sender address accepted', '250 Recipient address accepted', '354 Continue'] proto = SMTPFactory(self._gpg).buildProtocol(('127.0.0.1', 0)) transport = proto_helpers.StringTransport() proto.makeConnection(transport) for i, line in enumerate(self.EMAIL_DATA): proto.lineReceived(line + '\r\n') self.assertMatch(transport.value(), '\r\n'.join(SMTP_ANSWERS[0:i + 1])) proto.setTimeout(None) def test_message_encrypt(self): proto = SMTPFactory(self._gpg).buildProtocol(('127.0.0.1', 0)) user = User('leap@leap.se', 'relay.leap.se', proto, 'leap@leap.se') m = EncryptedMessage(user, self._gpg) for line in self.EMAIL_DATA[4:12]: m.lineReceived(line) m.parseMessage() m.encrypt() decrypted = str(self._gpg.decrypt(m.cyphertext)) self.assertEqual('\n'.join(self.EMAIL_DATA[9:12]), decrypted)