[feat] adding encryption header to msg before saving

This way we can tell if a message was originally encrypted, so that we
can show that information to the end user.

2 files changed, 32 insertions, 2 deletions

diff --git a/mail/src/leap/mail/incoming/service.py b/mail/src/leap/mail/incoming/service.py
index 2bc6751..57e0007 100644
--- a/mail/src/leap/mail/incoming/service.py
+++ b/mail/src/leap/mail/incoming/service.py
@@ -90,6 +90,7 @@ class IncomingMail(Service):
     CONTENT_KEY = "content"
 
     LEAP_SIGNATURE_HEADER = 'X-Leap-Signature'
+    LEAP_ENCRYPTION_HEADER = 'X-Leap-Encryption'
     """
     Header added to messages when they are decrypted by the fetcher,
     which states the validity of an eventual signature that might be included
@@ -99,6 +100,8 @@ class IncomingMail(Service):
     LEAP_SIGNATURE_INVALID = 'invalid'
     LEAP_SIGNATURE_COULD_NOT_VERIFY = 'could not verify'
 
+    LEAP_ENCRYPTION_DECRYPTED = 'decrypted'
+
     def __init__(self, keymanager, soledad, inbox, userid,
                  check_period=INCOMING_CHECK_PERIOD):
 
@@ -461,6 +464,9 @@ class IncomingMail(Service):
         d.addCallback(add_leap_header)
         return d
 
+    def _add_decrypted_header(self, msg):
+        msg.add_header(self.LEAP_ENCRYPTION_HEADER, self.LEAP_ENCRYPTION_DECRYPTED)
+
     def _decrypt_multipart_encrypted_msg(self, msg, encoding, senderAddress):
         """
         Decrypt a message with content-type 'multipart/encrypted'.
@@ -503,6 +509,7 @@ class IncomingMail(Service):
 
             # all ok, replace payload by unencrypted payload
             msg.set_payload(decrmsg.get_payload())
+            self._add_decrypted_header(msg)
             return (msg, signkey)
 
         d = self._keymanager.decrypt(
@@ -537,7 +544,9 @@ class IncomingMail(Service):
 
         def decrypted_data(res):
             decrdata, signkey = res
-            return data.replace(pgp_message, decrdata), signkey
+            replaced_data = data.replace(pgp_message, decrdata)
+            self._add_decrypted_header(origmsg)
+            return replaced_data, signkey
 
         def encode_and_return(res):
             data, signkey = res
diff --git a/mail/src/leap/mail/incoming/tests/test_incoming_mail.py b/mail/src/leap/mail/incoming/tests/test_incoming_mail.py
index f43f746..798824a 100644
--- a/mail/src/leap/mail/incoming/tests/test_incoming_mail.py
+++ b/mail/src/leap/mail/incoming/tests/test_incoming_mail.py
@@ -176,8 +176,22 @@ subject: independence of cyberspace
         d.addCallback(put_raw_key_called)
         return d
 
+    def testAddDecryptedHeader(self):
+        class DummyMsg():
+            def __init__(self):
+                self.headers = {}
+
+            def add_header(self, k, v):
+                self.headers[k]=v
+
+        msg = DummyMsg()
+        self.fetcher._add_decrypted_header(msg)
+
+        self.assertEquals(msg.headers['X-Leap-Encryption'], 'decrypted')
+
     def testDecryptEmail(self):
         self.fetcher._decryption_error = Mock()
+        self.fetcher._add_decrypted_header = Mock()
 
         def create_encrypted_message(encstr):
             message = Parser().parsestr(self.EMAIL)
@@ -198,9 +212,16 @@ subject: independence of cyberspace
             return newmsg
 
         def decryption_error_not_called(_):
-            self.assertFalse(self.fetcher._decyption_error.called,
+            self.assertFalse(self.fetcher._decryption_error.called,
                              "There was some errors with decryption")
 
+        def add_decrypted_header_called(_):
+            self.assertTrue(self.fetcher._add_decrypted_header.called,
+                             "There was some errors with decryption")
+
+
+
+
         d = self._km.encrypt(
             self.EMAIL,
             ADDRESS, OpenPGPKey, sign=ADDRESS_2)