dev-python/pyldap: Backport patch for bytes/string conversion problem

Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=562854

Package-Manager: portage-2.2.23
Signed-off-by: Justin Lecher <jlec@gentoo.org>

dev-python/pyldap/files/pyldap-2.4.20-bytes_string-backport.patch

@@ -0,0 +1,49 @@
+From 6e9e1902f33bff8ea179dc32ce4d2aa71b3335de Mon Sep 17 00:00:00 2001
+From: Petr Viktorin <pviktori@redhat.com>
+Date: Fri, 2 Oct 2015 14:06:12 +0200
+Subject: [PATCH] Fix sasl string/bytes mismatch
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The SASL mechanism and response are always bytes; encode them if necessary.
+
+Based on patch by Michael Šimáček: https://github.com/pyldap/pyldap/pull/20
+---
+ Lib/ldap/sasl.py | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/Lib/ldap/sasl.py b/Lib/ldap/sasl.py
+index 1158671..de38393 100644
+--- a/Lib/ldap/sasl.py
++++ b/Lib/ldap/sasl.py
+@@ -46,6 +46,8 @@ def __init__(self,cb_value_dict,mech):
+         SASL callback id's. The mech argument is a string that specifies
+         the SASL mechaninsm to be uesd."""
+         self.cb_value_dict = cb_value_dict or {}
++        if not isinstance(mech, bytes):
++            mech = mech.encode('utf-8')
+         self.mech = mech
+ 
+     def callback(self,cb_id,challenge,prompt,defresult):
+@@ -62,7 +64,10 @@ def callback(self,cb_id,challenge,prompt,defresult):
+         cb_value_dictionary. Note that the current callback interface is not very
+         useful for writing generic sasl GUIs, which would need to know all
+         the questions to ask, before the answers are returned to the sasl
+-        lib (in contrast to one question at a time)."""
++        lib (in contrast to one question at a time).
++
++        Unicode strings are always converted to bytes.
++        """
+ 
+         # The following print command might be useful for debugging
+         # new sasl mechanisms. So it is left here
+@@ -72,6 +77,8 @@ def callback(self,cb_id,challenge,prompt,defresult):
+             _trace_file.write("*** id=%d, challenge=%s, prompt=%s, defresult=%s\n-> %s\n" % (
+                 cb_id, challenge, prompt, repr(defresult), repr(self.cb_value_dict.get(cb_result))
+               ))
++        if not isinstance(cb_result, bytes):
++            cb_result = cb_result.encode('utf-8')
+         return cb_result
+ 
+