GnuTLS 2.10.2 released

Simon Josefsson simon at
Thu Sep 30 11:13:09 CEST 2010

We are proud to announce a new stable GnuTLS release: Version 2.10.2.

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

** Use Libtool 2.2.10 to ease MinGW64 builds.

** libgnutls: Add new extended key usage ipsecIKE.

** libgnutls: Is now more liberal in the PEM decoding.
That is spaces and tabs are being skipped.

** libgnutls: Renamed NULL MAC to MAC-NULL to prevent clash with NULL cipher.
This prevented the usage of the TLS ciphersuites with NULL cipher.
See <>.

** libgnutls: The %COMPAT flag now allows larger records that violate the
TLS spec.

** libgnutls: Fix asynchronous API handling.
The code was clearing session hash data on EAGAIN.  Problem reported
by Sjoerd Simons <sjoerd.simons at> and Vivek
Dasmohapatra <vivek at>.  See

** gnutls-cli: Flush stdout/stderr before removing buffering.
Reported by Knut Anders Hatlen see

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

Getting the Software

GnuTLS may be downloaded from one of the GNU mirror sites or directly
From <>.  The list of GNU mirrors can be
found at <> and a list of GnuTLS mirrors
can be found at <>.

Here are the BZIP2 compressed sources (7.2MB):

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-2.10.2.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:

2704b7b86fc5e3444afcf20feb7bc9ff117d4816  gnutls-2.10.2.tar.bz2

d0a6c3f658da5dd6c74d9cf24ddf4b2b6bb4dd73c28d64c4053997c9  gnutls-2.10.2.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:



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 versions included
are libgpg-error v1.8, libgcrypt v1.4.6, and GnuTLS v2.10.2.

New in this release is that we have changed build environment for the
Windows builds.  We are now using MinGW-w64 from
<> built with GCC 4.5.1.  The Windows
build scripts reside in:

The Windows binary installer (16MB):

The OpenPGP detached signatures signed using key 0xB565716F:

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

6f402bb6babb3aae591c76bde1bfd48e60d21100  gnutls-2.10.2-x86.exe

589c2fcf412836907df4057945bc4d43b6da337a62f3771121f5b31d  gnutls-2.10.2-x86.exe

A ZIP archive with Windows binaries (5.8MB):

The OpenPGP detached signatures signed using key 0xB565716F:

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



A Debian mingw32 package is also available (5.4MB):

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

925cdb8e1c4b0e7c462a4ad0b01a2f80f3d2537c  mingw32-gnutls_2.10.2-1_all.deb

807d26b8d3f458ac8352481c262c188d1d842573fea5b2986121c0dd  mingw32-gnutls_2.10.2-1_all.deb


The GnuTLS library messages have been translated into Czech, Dutch,
French, German, Italian, Malay, Polish, Simplified Chinese, 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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