[tests] add test to validate signature from apple mail

This change adds test to validate signature of encrypted email created
by apple mail. It's important to note that apple mail has a specific way
to encrypt signed messages. First it sign the email and then encrypt the
previous signed message. It was also added a message file with the
expected data.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/leap/mail/incoming/tests/test_incoming_mail.py b/src/leap/mail/incoming/tests/test_incoming_mail.py
index 754df9f..91f2556 100644
--- a/src/leap/mail/incoming/tests/test_incoming_mail.py
+++ b/src/leap/mail/incoming/tests/test_incoming_mail.py
@@ -22,6 +22,7 @@ Test case for leap.mail.incoming.service
 @license: GPLv3, see included LICENSE file
 """
 
+import os
 import json
 
 from email.mime.application import MIMEApplication
@@ -295,6 +296,23 @@ subject: independence of cyberspace
             self._do_fetch(message.as_string()))
         return d
 
+    def testValidateSignatureFromEncryptedEmailFromAppleMail(self):
+        CURRENT_PATH = os.path.split(os.path.abspath(__file__))[0]
+        enc_signed_file = os.path.join(CURRENT_PATH,
+                                       'rfc822.multi-encrypt-signed.message')
+        self.fetcher._add_verified_signature_header = Mock()
+
+        def add_verified_signature_header_called(_):
+            self.assertTrue(self.fetcher._add_verified_signature_header.called,
+                            "There was some errors verifying signature")
+
+        with open(enc_signed_file) as f:
+            enc_signed_raw = f.read()
+
+        d = self._do_fetch(enc_signed_raw)
+        d.addCallback(add_verified_signature_header_called)
+        return d
+
     def testListener(self):
         self.called = False