GnuTLS 2.8.6

Simon Josefsson simon at
Mon Mar 15 14:23:00 CET 2010

We are proud to announce a new stable GnuTLS release: Version 2.8.6.

GnuTLS is a modern C library that implements the standard network
security protocol Transport Layer Security (TLS), for use by network
applications.  GnuTLS is developed for GNU/Linux, but works on many
Unix-like systems and comes with a binary installer for Windows.

The GnuTLS library is distributed under the terms of the GNU Lesser
General Public License version 2.1 (or later).  The "extra" GnuTLS
library (which contains TLS/IA support, LZO compression and Libgcrypt
FIPS-mode handler), the OpenSSL compatibility library, the self tests
and the command line tools are all distributed under the GNU General
Public License version 3.0 (or later).  The manual is distributed under
the GNU Free Documentation License version 1.3 (or later).

The project page of the library is available at:

What's New

** libgnutls: For CSRs, don't null pad integers for RSA/DSA value.
VeriSign rejected CSRs with this padding.  Reported by Wilankar Trupti
<trupti.wilankar at> and Boyan Kasarov <bkasarov at>.

Note: As a side effect of this change, the "public key identifier"
value computed for a certificate using this version of GnuTLS will be
different from values computed using earlier versions of GnuTLS.

** libgnutls: For CSRs on DSA keys, don't add DSA parameters to the
** optional SignatureAlgorithm parameter field.
VeriSign rejected these CSRs.  They are stricly speaking not needed
since you need the signer's certificate to verify the certificate
signature anyway.  Reported by Wilankar Trupti
<trupti.wilankar at> and Boyan Kasarov <bkasarov at>.

** libgnutls: When checking openpgp self signature also check the signatures
** of all subkeys.
Ilari Liusvaara noticed and reported the issue and provided test
vectors as well.

** libgnutls: Cleanups and several bug fixes.
Found by Steve Grubb and Tomas Mraz.

** Link libgcrypt explicitly to certtool, gnutls-cli, gnutls-serv.

** Fix --disable-valgrind-tests.
Reported by Ingmar Vanhassel in

** examples: Use the new APIs for printing X.509 certificate information.

** Fix build failures on Solaris.
Thanks to Dagobert Michelsen <dam at>.

** i18n: Updated Czech, Dutch, French, Polish, Swedish and Vietnamese
** translations.  Added Simplified Chinese translation.

** API and ABI modifications:
No changes since last version.

Getting the Software

GnuTLS may be downloaded from one of the mirror sites or direct from
<>.  The list of mirrors can be found at

Here are the BZIP2 compressed sources (6.2MB):

Here are OpenPGP detached signatures signed using key 0xB565716F:

Note, that we don't distribute gzip compressed tarballs.

In order to check that the version of GnuTLS which you are going to
install is an original and unmodified one, you should verify the OpenPGP
signature.  You can use the command

     gpg --verify gnutls-2.8.6.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
that signing key.  Make sure that you have the right key, either by
checking the fingerprint of that key with other sources or by checking
that the key has been signed by a trustworthy other key.  The signing
key can be identified with the following information:

pub   1280R/B565716F 2002-05-05 [expires: 2011-03-30]
      Key fingerprint = 0424 D4EE 81A0 E3D1 19C6  F835 EDA2 1E94 B565 716F
uid                  Simon Josefsson <jas at>
uid                  Simon Josefsson <simon at>
sub   1280R/4D5D40AE 2002-05-05 [expires: 2011-03-30]

The key is available from:

Alternatively, after successfully verifying the OpenPGP signature of
this announcement, you could verify that the files match the following
checksum values.  The values are for SHA-1 and SHA-224 respectively:

bff911d4fd7389aa6698a644b3748eb2d23715bc  gnutls-2.8.6.tar.bz2
a6b36fa1926a7fd3cb68746446c29dc1cbef0cc6bcfd25877fde64ad  gnutls-2.8.6.tar.bz2


The manual is available online at:

In particular the following formats are available:


For developers there is a GnuTLS API reference manual formatted using
the GTK-DOC tools:

For developers interested in improving code quality, we publish
Cyclomatic code complexity charts that help you find code that may need
review and improvements:

Also useful are code coverage charts which indicate parts of the source
code that needs to be tested better by the included self-tests:


If you need help to use GnuTLS, or want to help others, you are invited
to join our help-gnutls mailing list, see:

If you wish to participate in the development of GnuTLS, you are invited
to join our gnutls-dev mailing list, see:

Windows installer

GnuTLS has been ported to the Windows operating system, and a binary
installer is available.  The installer contains DLLs for application
development, manuals, examples, and source code.  The installer includes
libgpg-error v1.7, libgcrypt v1.4.5, libtasn1 v2.4, and GnuTLS v2.8.6.

For more information about GnuTLS for Windows:

The Windows binary installer and PGP signature: (16MB)

The checksum values for SHA-1 and SHA-224 are:

cbfc717d33edbc1f6eb891e14e5d6935bcfb7dc6  gnutls-2.8.6.exe
42e5bc23dd110de93f36d1e4e13447083d4127e1da18b190f02b4031  gnutls-2.8.6.exe

A ZIP archive containing the Windows binaries: (5.3MB)

The checksum values for SHA-1 and SHA-224 are:


A Debian mingw32 package is also available: (4.8MB)

The checksum values for SHA-1 and SHA-224 are:

8719083d715ad5f244265bfeebedf491112f6a8a  mingw32-gnutls_2.8.6-1_all.deb
ef6b6b927968ea393ee3571a649d325232c33ee92335eaf2dc090c55  mingw32-gnutls_2.8.6-1_all.deb


The GnuTLS library messages have been translated into Czech, Dutch,
French, German, Malay, Polish, Swedish, and Vietnamese.  We welcome the
addition of more translations.


Improving GnuTLS is costly, but you can help!  We are looking for
organizations that find GnuTLS useful and wish to contribute back.  You
can contribute by reporting bugs, improve the software, or donate money
or equipment.

Commercial support contracts for GnuTLS are available, and they help
finance continued maintenance.  Simon Josefsson Datakonsult AB, a
Stockholm based privately held company, is currently funding GnuTLS
maintenance.  We are always looking for interesting development
projects.  See for more details.

The GnuTLS service directory is available at:

Happy Hacking,
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