[Announce] Libgcrypt 1.5.4 released

[Werner Koch]

Hello!

The GNU project is pleased to announce an update of the Libgcrypt 1.5
series: version 1.5.4.  This is a maintenance release with backports of
fixes from the current stable 1.6 series.

In general it is preferable to use the latest stable version.  However,
the 1.6 series introduced an ABI break and thus some older software may
not build or work correctly with 1.6.

Libgcrypt is a general purpose library of cryptographic building blocks.
It does not provide any implementation of OpenPGP or other protocols.
Thorough understanding of applied cryptography is required for proper
use Libgcrypt.


Noteworthy changes in version 1.5.4 (2014-08-07)
================================================

 * Declare 2016-12-31 as end-of-life for 1.5.

 Backported from 1.6:

 * Improved performance of RSA, DSA, and Elgamal by using a new
   exponentiation algorithm.

 * Fixed a subtle bug in mpi_set_bit which could set spurious bits.

 * Fixed a bug in an internal division function.


Download
========

Source code is hosted at the GnuPG FTP server and its mirrors as listed
at http://www.gnupg.org/download/mirrors.html .  On the primary server
the source tarball and its digital signature are:

 ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.5.4.tar.bz2 (1478k)
 ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.5.4.tar.bz2.sig

That file is bzip2 compressed.  A gzip compressed version is here:

 ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.5.4.tar.gz (1763k)
 ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.5.4.tar.gz.sig

Alternativley you may upgrade using this patch file:

 ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.5.3-1.5.4.diff.bz2 (17k)

In order to check that the version of Libgcrypt you are going to build
is an original and unmodified one, you can do it in one of the following
ways:

 * Check the supplied OpenPGP signature.  For example to check the
   signature of the file libgcrypt-1.5.4.tar.bz2 you would use this
   command:

     gpg --verify libgcrypt-1.5.4.tar.bz2.sig

   This checks whether the signature file matches the source file.  You
   should see a message indicating that the signature is good and made
   by the release signing key 4F25E3B6 which is certified by my well
   known key 1E42B367.  To retrieve the keys you may use the command
   "gpg --fetch-key finger:wk at g10code.com".

 * If you are not able to use GnuPG, you have to verify the SHA-1
   checksum:

     sha1sum libgcrypt-1.5.4.tar.bz2

   and check that the output matches the first line from the
   following list:

bdf4b04a0d2aabc04ab3564fbe38fd094135aa7a  libgcrypt-1.5.4.tar.bz2
71e432e0ae8792076a40c6059667997250abbb9d  libgcrypt-1.5.4.tar.gz
8876ae002751e6ec26c76e510d17fc3e0eccb3ed  libgcrypt-1.5.3-1.5.4.diff.bz2


Copying
=======

Libgcrypt is distributed under the terms of the GNU Lesser General
Public License (LGPLv2.1+).  The helper programs as well as the
documentation are distributed under the terms of the GNU General Public
License (GPLv2+).  The file LICENSES has notices about contributions
that require these additional notices are distributed.


Support
=======

For help on developing with Libgcrypt you should read the included
manual and optional ask on the gcrypt-devel mailing list [1].  A
listing with commercial support offers for Libgcrypt and related
software is available at the GnuPG web site [2].

The driving force behind the development of Libgcrypt is my company
g10 Code.  Maintenance and improvement of Libgcrypt and related
software takes up most of our resources.  To allow us to continue our
work on free software, we ask to either purchase a support contract,
engage us for custom enhancements, or to donate money:

  http://gnupg.org/donate/


Thanks
======

Many thanks to all who contributed to Libgcrypt development, be it bug
fixes, code, documentation, testing or helping users.


Happy hacking,

  Werner


[1] https://lists.gnupg.org/mailman/listinfo/gcrypt-devel
[2] https://gnupg.org/service.html

-- 
Die Gedanken sind frei.  Ausnahmen regelt ein Bundesgesetz.
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