From: Mark Wooding <mdw@distorted.org.uk>
Date: Thu, 26 May 2016 08:26:09 +0000 (+0100)
Subject: bytestring.c, catacomb/__init__.py: Compare for equality in constant time.
X-Git-Url: https://git.distorted.org.uk/~mdw/pyke/commitdiff_plain/54ecf9dd37fb6fac413c9545b2788edb54e20bff

bytestring.c, catacomb/__init__.py: Compare for equality in constant time.

There's an explicit `ctstreq' function which just does what you wanted.
Also, `ByteString' objects now have a rich-compare method which always
compares for equality in constant time.  Ordering comparisons are
variable time still.

There's a little chicanery to retain the hash function from `str'.

Also add a simple `check' method to `GHash' and `Poly1305Hash' which
compares a hsah or MAC tag in constant time and returns a boolean
result.
---

diff --git a/catacomb-python.h b/catacomb-python.h
index 77c7eae..f1e6365 100644
--- a/catacomb-python.h
+++ b/catacomb-python.h
@@ -46,6 +46,7 @@
 #include <mLib/unihash.h>
 
 #include <catacomb/buf.h>
+#include <catacomb/ct.h>
 
 #include <catacomb/grand.h>
 #include <catacomb/rand.h>