From df901569fc77d7c990b6da8546a21e7a8957a5e7 Mon Sep 17 00:00:00 2001
From: Kali Kaneko <kali@leap.se>
Date: Wed, 9 Mar 2016 12:54:22 -0400
Subject: [bug] specify openssl backend explicitely

for some reason, available_backends does not work inside a frozen
PyInstaller binary.

- Resolves: #7952
---
 src/leap/mail/walk.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/leap')

diff --git a/src/leap/mail/walk.py b/src/leap/mail/walk.py
index 8693bdd..b2aa304 100644
--- a/src/leap/mail/walk.py
+++ b/src/leap/mail/walk.py
@@ -17,14 +17,16 @@
 """
 Utilities for walking along a message tree.
 """
-from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.backends.multibackend import MultiBackend
+from cryptography.hazmat.backends.openssl.backend import Backend as OpenSSLBackend 
 from cryptography.hazmat.primitives import hashes
 
 from leap.mail.utils import first
 
 
 def get_hash(s):
-    digest = hashes.Hash(hashes.SHA256(), default_backend())
+    backend = MultiBackend([OpenSSLBackend()])
+    digest = hashes.Hash(hashes.SHA256(), backend)
     digest.update(s)
     return digest.finalize().encode("hex").upper()
 
-- 
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