bcrypt work

* added code to shoehorn $2$-support wrapper for bcryptor backend
* added PasslibSecurityWarning when builtin backend is enabled
  (still considered whether it should be enabled by default)
* py3 compat fix for repair_unused

1 files changed, 4 insertions, 1 deletions

diff --git a/passlib/utils/__init__.py b/passlib/utils/__init__.py
index 6d26d91..24173f7 100644
--- a/passlib/utils/__init__.py
+++ b/passlib/utils/__init__.py
@@ -974,11 +974,14 @@ class Base64Engine(object):
         if isinstance(source, unicode):
             cm = self.charmap
             last = cm[cm.index(last) & mask]
+            assert last in padset, "failed to generate valid padding char"
         else:
             # NOTE: this assumes ascii-compat encoding, and that
             # all chars used by encoding are 7-bit ascii.
             last = self._encode64(self._decode64(last) & mask)
-        assert last in padset, "failed to generate valid padding char"
+            assert last in padset, "failed to generate valid padding char"
+            if PY3:
+                last = bytes([last])
         return True, source[:-1] + last
 
     def repair_unused(self, source):