#12197: Nettle-3.5
-------------------------+-----------------------
Reporter: renodr | Owner: blfs-book
Type: enhancement | Status: new
Priority: normal | Milestone: 8.5
Component: BOOK | Version: SVN
Severity: normal | Keywords:
-------------------------+-----------------------
New minor version
{{{
NEWS for the Nettle 3.5 release
This release adds a couple of new features and optimizations,
and deletes or deprecates a few obsolete features. It is *not*
binary (ABI) compatible with earlier versions. Except for
deprecations listed below, it is intended to be fully
source-level (API) compatible with Nettle-3.4.1.
The shared library names are libnettle.so.7.0 and
libhogweed.so.5.0, with sonames libnettle.so.7 and
libhogweed.so.5.
Changes in behavior:
* Nettle's gcm_crypt will now call the underlying block cipher
to process more than one block at a time. This is not a
change to the documented behavior, but unfortunately breaks
assumptions accidentally made in GnuTLS, up to and including
version 3.6.1.
New features:
* Support for CFB8 (Cipher Feedback Mode, processing a single
octet per block cipher operation), contributed by Dmitry
Eremin-Solenikov.
* Support for CMAC (RFC 4493), contributed by Nikos
Mavrogiannopoulos.
* Support for XTS mode, contributed by Simo Sorce.
Optimizations:
* Improved performance of the x86_64 AES implementation using
the aesni instructions. Gives a large speedup for operations
processing multiple blocks at a time (including CTR mode,
GCM mode, and CBC decrypt, but *not* CBC encrypt).
* Improved performance for CTR mode, for the common case of
16-byte block size. Pass more data at a time to underlying
block cipher, and fill the counter blocks more efficiently.
Extension to also handle GCM mode efficiently contributed
by Nikos Mavrogiannopoulos.
* New x86_64 implementation of sha1 and sha256, for processors
supporting the sha_ni instructions. Speedup of 3-5 times on
affected processors.
* Improved parameters for the precomputation of tables used
for ecc signatures. Roughly 10%-15% speedup of the ecdsa
sign operation using the secp_256r1, secp_384r1 and
secp_521r1 curves, and 25% speedup of ed25519 sign
operation, benchmarked on x86_64. Table sizes unchanged,
around 16 KB per curve.
* In ARM fat builds, automatically select Neon implementation
of Chacha, where possible. Contributed by Yuriy M.
Kaminskiy.
Deleted features:
* The header file des-compat.h and everything declared therein
has been deleted, as announced earlier. This file provided a
subset of the old libdes/ssleay/openssl interface for DES
and triple-DES. DES is still supported, via the functions
declared in des.h.
* Functions using the old struct aes_ctx have been marked as
deprecated. Use the fixed key size interface instead, e.g.,
struct aes256_ctx, introduced in Nettle-3.0.
* The header file nettle-stdint.h, and corresponding autoconf
tests, have been deleted. Nettle now requires that the
compiler/libc provides <stdint.h>.
Miscellaneous:
* Support for big-endian ARM systems, contributed by Michael
Weiser.
* The programs aesdata, desdata, twofishdata, shadata and
gcmdata are no longer built by default. Makefile
improvements contributed by Jay Foad.
* The "example" program examples/eratosthenes.c has been
deleted.
* The contents of hash context structs, and the deprecated
aes_ctx struct, have been reorganized, to enable later
optimizations.
}}}
Note the ABI incompatible part. We'll have to rebuild every package that
uses Nettle.
--
Ticket URL: <http://wiki.linuxfromscratch.org/blfs/ticket/12197>
BLFS Trac <http://wiki.linuxfromscratch.org/blfs>
Beyond Linux From Scratch
--
http://lists.linuxfromscratch.org/listinfo/blfs-book
FAQ: http://www.linuxfromscratch.org/blfs/faq.html
Unsubscribe: See the above information page
