Initial import

5 files changed, 437 insertions, 0 deletions

diff --git a/src/leap/mail/smtp/tests/185CA770.key b/src/leap/mail/smtp/tests/185CA770.key
new file mode 100644
index 0000000..587b416
--- /dev/null
+++ b/src/leap/mail/smtp/tests/185CA770.key
@@ -0,0 +1,79 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+Version: GnuPG v1.4.10 (GNU/Linux)
+
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+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/src/leap/mail/smtp/tests/185CA770.pub b/src/leap/mail/smtp/tests/185CA770.pub
new file mode 100644
index 0000000..38af19f
--- /dev/null
+++ b/src/leap/mail/smtp/tests/185CA770.pub
@@ -0,0 +1,52 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1.4.10 (GNU/Linux)
+
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+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/src/leap/mail/smtp/tests/__init__.py b/src/leap/mail/smtp/tests/__init__.py
new file mode 100644
index 0000000..d7b942a
--- /dev/null
+++ b/src/leap/mail/smtp/tests/__init__.py
@@ -0,0 +1,218 @@
+import os
+import shutil
+import tempfile
+
+from twisted.trial import unittest
+
+from leap.common.testing.basetest import BaseLeapTest
+from leap.mail.smtp.smtprelay import GPGWrapper
+
+
+class OpenPGPTestCase(unittest.TestCase, BaseLeapTest):
+
+    def setUp(self):
+        # mimic LeapBaseTest.setUpClass behaviour, because this is deprecated
+        # in Twisted: http://twistedmatrix.com/trac/ticket/1870
+        self.old_path = os.environ['PATH']
+        self.old_home = os.environ['HOME']
+        self.tempdir = tempfile.mkdtemp(prefix="leap_tests-")
+        self.home = self.tempdir
+        bin_tdir = os.path.join(
+            self.tempdir,
+            'bin')
+        os.environ["PATH"] = bin_tdir
+        os.environ["HOME"] = self.tempdir
+        # setup our own stuff
+        self.gnupg_home = self.tempdir + '/gnupg'
+        os.mkdir(self.gnupg_home)
+        self.email = 'leap@leap.se'
+        self._gpg = GPGWrapper(gpghome=self.gnupg_home)
+
+        self.assertEqual(self._gpg.import_keys(PUBLIC_KEY).summary(),
+                         '1 imported', "error importing public key")
+        self.assertEqual(self._gpg.import_keys(PRIVATE_KEY).summary(),
+                         # note that gnupg does not return a successful import
+                         # for private keys. Bug?
+                         '0 imported', "error importing private key")
+
+    def tearDown(self):
+        # mimic LeapBaseTest.tearDownClass behaviour
+        os.environ["PATH"] = self.old_path
+        os.environ["HOME"] = self.old_home
+        # safety check
+        assert self.tempdir.startswith('/tmp/leap_tests-')
+        shutil.rmtree(self.tempdir)
+
+    def test_openpgp_encrypt_decrypt(self):
+        "Test if openpgp can encrypt and decrypt."
+        text = "simple raw text"
+        encrypted = str(self._gpg.encrypt(text, KEY_FINGERPRINT,
+                                          # TODO: handle always trust issue
+                                          always_trust=True))
+        self.assertNotEqual(text, encrypted, "failed encrypting text")
+        decrypted = str(self._gpg.decrypt(encrypted))
+        self.assertEqual(text, decrypted, "failed decrypting text")
+
+
+# Key material for testing
+KEY_FINGERPRINT = "E36E738D69173C13D709E44F2F455E2824D18DDF"
+PUBLIC_KEY = """
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1.4.10 (GNU/Linux)
+
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+=MuOY
+-----END PGP PUBLIC KEY BLOCK-----
+"""
+PRIVATE_KEY = """
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+Version: GnuPG v1.4.10 (GNU/Linux)
+
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+RZXoH+FTg9UAW87eqU610npOkT6cRaBxaMK/mDtGNdc=
+=JTFu
+-----END PGP PRIVATE KEY BLOCK-----
+"""
diff --git a/src/leap/mail/smtp/tests/mail.txt b/src/leap/mail/smtp/tests/mail.txt
new file mode 100644
index 0000000..9542047
--- /dev/null
+++ b/src/leap/mail/smtp/tests/mail.txt
@@ -0,0 +1,10 @@
+HELO drebs@riseup.net
+MAIL FROM: drebs@riseup.net
+RCPT TO: drebs@riseup.net
+RCPT TO: drebs@leap.se
+DATA
+Subject: leap test
+
+Hello world!
+.
+QUIT
diff --git a/src/leap/mail/smtp/tests/test_smtprelay.py b/src/leap/mail/smtp/tests/test_smtprelay.py
new file mode 100644
index 0000000..eaa4d04
--- /dev/null
+++ b/src/leap/mail/smtp/tests/test_smtprelay.py
@@ -0,0 +1,78 @@
+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(None, 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):
+        """
+        Test if message gets encrypted to destination email.
+        """
+        proto = SMTPFactory(None, self._gpg).buildProtocol(('127.0.0.1', 0))
+        user = User('leap@leap.se', 'relay.leap.se', proto, 'leap@leap.se')
+        m = EncryptedMessage(user, None, 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)