Unroll DES to encrypt/decrypt 2 rounds in parallel

About 50% faster for CBC decrypt

1 files changed, 3 insertions, 0 deletions

diff --git a/news.rst b/news.rst
index 5171f2cdd..fd68ae688 100644
--- a/news.rst
+++ b/news.rst
@@ -21,6 +21,9 @@ Version 2.7.0, Not Yet Released
 * Allow the year to be up to 2200 in ASN.1 time objects. Previously this
   was limited to 2100. (GH #1536)
 
+* Optimizations for DES/3DES, approx 50% faster when used in certain
+  modes such as CBC decrypt or CTR.
+
 * XMSS signature verification did not check that the signature was of
   the expected length which could lead to a crash. (GH #1537)