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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: <user@leap.se>',
'RCPT TO: <leap@leap.se>',
'DATA',
'From: User <user@leap.se>',
'To: Leap <leap@leap.se>',
'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)
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