GnuTLS 2.2.3

Simon Josefsson simon at
Tue May 6 14:40:59 CEST 2008

We are pleased to announce a new stable GnuTLS release: Version 2.2.3.

GnuTLS is a modern C library that implement 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 core GnuTLS library is distribute under the terms of the GNU Lesser
General Public License version 2.1 (or later).  The "extra" GnuTLS
libraries -- which contains OpenPGP and TLS/IA support, LZO compression,
the OpenSSL compatibility library -- and the self tests and command line
tools are distributed under the GNU General Public License version 3.0
(or later).  The manual is distributed under the GNU Free Documentation
License version 1.2 (or later).

The project page of the library is available at:

What's New

* Version 2.2.3 (released 2008-05-06)

** Increase default handshake packet size limit to 48kb.
The old limit was 16kb and some servers send huge list of trusted CAs,
thus running into the limit.  FYI, applications can further increase
this limit using gnutls_handshake_set_max_packet_length.  Thanks to
Marc Haber <mh+debian-bugs at> and "Marc F. Clemente"
<marc at> for reporting and providing test servers.

** Fix compilation error related to __FUNCTION__ on some systems.
Reported by Tim Mooney, see

** Documented the --priority option to gnutls-cli and gnutls-serv.

** Fix fopen file descriptor leak in PSK server code.
Thanks to Laurence Withers <l at>, see

** Build Guile code with -fgnu89-inline only when supported.
Reported by Kris Karas <ktk at> in

** Make Camellia encryption work.
Reported by Yoshisato YANAGISAWA <yanagisawa at> in

** 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
<>.  Note, that GnuTLS
is not available at

Here are the BZIP2 compressed sources (4.8MB):

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-2.2.3.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: 2008-06-30]
      Key fingerprint = 0424 D4EE 81A0 E3D1 19C6  F835 EDA2 1E94 B565 716F
uid                  Simon Josefsson <simon at>
uid                  Simon Josefsson <jas at>

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:

285346586fa67c97c8c3d6f8a6bc22a55b188f76  gnutls-2.2.3.tar.bz2

05aad4b90b89fbd3aa22966dc4f08539ba3e579fd0fef9f10c0d32d0  gnutls-2.2.3.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-devel 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 consists
of libgpg-error 1.6, libgcrypt 1.4.1, libtasn1 1.4, and GnuTLS 2.2.3.

For more information about GnuTLS for Windows:

The Windows binary installer and OpenPGP signature: (13MB)

A ZIP file with the installed tree of binaries: (4.6MB)

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

e86df96993f5ef6017036c9e7db52992f38abedc  gnutls-2.2.3.exe
0c077a6cd8de514393d8a70d9c9648326277155970c693fc260e50f5  gnutls-2.2.3.exe



GnuTLS messages have been translated into Dutch, German, Malay, Polish
and Swedish.  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, 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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