diff options
Diffstat (limited to 'src/leap/bitmask/mail/incoming/service.py')
| -rw-r--r-- | src/leap/bitmask/mail/incoming/service.py | 54 |
1 files changed, 41 insertions, 13 deletions
diff --git a/src/leap/bitmask/mail/incoming/service.py b/src/leap/bitmask/mail/incoming/service.py index 3cec66e..4807c8f 100644 --- a/src/leap/bitmask/mail/incoming/service.py +++ b/src/leap/bitmask/mail/incoming/service.py @@ -458,7 +458,9 @@ class IncomingMail(Service): return decrmsg.as_string() d = self._decrypt_by_content_type(msg, senderAddress, encoding) - d.addCallback(self._maybe_extract_keys, msg, senderAddress, encoding) + d.addCallback(self._maybe_extract_keys) + d.addCallback(self._maybe_re_decrypt_with_new_key, msg, senderAddress, + encoding) d.addCallback(add_leap_header) return d @@ -642,8 +644,7 @@ class IncomingMail(Service): return failure @defer.inlineCallbacks - def _maybe_extract_keys(self, data_signkey, origmsg, senderAddress, - encoding): + def _maybe_extract_keys(self, data_signkey): """ Retrieve attached keys to the mesage and parse message headers for an *OpenPGP* header as described on the `IETF draft @@ -652,19 +653,13 @@ class IncomingMail(Service): for security reasons. :param data_signkey: a tuple consisting of a decrypted Message and the - signing OpenPGPKey if the signature is valid or - InvalidSignature or KeyNotFound. + signing OpenPGPKey if the signature is valid or + InvalidSignature or KeyNotFound. :type data_signkey: (Message, OpenPGPKey or InvalidSignature or KeyNotFound) - :param origmsg: The original, possibly encrypted message. - :type origmsg: Message - :param encoding: The encoding of the email message. - :type encoding: str - :param senderAddress: The email address of the sender of the message. - :type senderAddress: str - :return: A Deferred that will be fired with data_signkey when key - extraction finishes + :return: A Deferred that will be fired with data_signkey and + key_imported (boolean) when key extraction finishes :rtype: Deferred """ OpenPGP_HEADER = 'OpenPGP' @@ -688,6 +683,39 @@ class IncomingMail(Service): key_imported = yield self._maybe_extract_openpgp_header( header, fromAddress) + defer.returnValue((data_signkey, key_imported)) + + @defer.inlineCallbacks + def _maybe_re_decrypt_with_new_key(self, datasignkey_keyimported, + origmsg, senderAddress, encoding): + + """ + Repeat the decrypt call with a new key, in case the previous signature + verification failed and a new key was imported. + + :param datasignkey_keyimported: a tuple consisting of another tuple + with a decrypted Message and the + signing OpenPGPKey if the signature is + valid or InvalidSignature or + KeyNotFound, and key_imported, a + boolean, indicating if the key was + successfully imported + :type datasignkey_keyimported: ((Message, OpenPGPKey or + InvalidSignature or KeyNotFound), + key_imported) + :param origmsg: The original, possibly encrypted message. + :type origmsg: Message + :param senderAddress: The email address of the sender of the message. + :type senderAddress: str + :param encoding: The encoding of the email message. + :type encoding: str + + :return: A Deferred that will be fired with data_signkey + :rtype: Deferred + """ + data_signkey, key_imported = datasignkey_keyimported + data, signkey = data_signkey + def previous_verify_failed(): return (isinstance(signkey, keymanager_errors.KeyNotFound) or isinstance(signkey, keymanager_errors.InvalidSignature)) |