From: Dr. Volker Zell <dr.volker.zell@oracle.com>
To: cygwin-announce@cygwin.com
Subject: Updated: {nettle/libnettle4/libhogweed2/libnettle-devel}-2.7.1-1: A cryptographic library that is designed to fit easily in more or less any context
Date: Sun, 13 Mar 2016 14:18:00 -0000 [thread overview]
Message-ID: <vrivshzubhbo.fsf@leila.volkerzell.de> (raw)
Hi
New versions of 'nettle/libnettle4/libhogweed2/libnettle-devel' have been uploaded to a server near you.
o Build for cygwin 2.4.1-1 with gcc-5.3.0-3
o Update to 2.7.1
o Fix for CVEs, see https://cygwin.com/ml/cygwin-apps/2016-03/msg00000.html
nettle NEWS:
============
* Fixed a bug in the new ECC code. The ecc_j_to_a function
called GMP:s mpn_mul_n (via ecc_modp_mul) with overlapping
input and output arguments, which is not supported.
* The assembly files for SHA1, SHA256 and AES depend on ARMv6
instructions, breaking nettle-2.7 for pre-v6 ARM processors.
The configure script now enables those assembly files only
when building for ARMv6 or later.
* Use a more portable C expression for rotations. The
previous version used the following "standard" expression
for 32-bit rotation:
(x << n) | (x >> (32 - n))
But this gives undefined behavior (according to the C
specification) for n = 0. The rotate expression is replaced
by the more portable:
(x << n) | (x >> ((-n)&31))
This change affects only CAST128, which uses non-constant
rotation counts. Unfortunately, the new expression is poorly
optimized by released versions of gcc, making CAST128 a bit
slower. This is being fixed by the gcc hackers, see
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57157.
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