GnuTLS 2.4.2

Simon Josefsson simon at
Tue Sep 16 00:22:04 CEST 2008

We are proud to announce a new stable GnuTLS release: Version 2.4.2.

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 distributed under the terms of the GNU Lesser
General Public License version 2.1 (or later).  The "extra" GnuTLS
libraries -- which contains TLS/IA support, LZO compression -- and the
OpenSSL compatibility library 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

Changes compared to the last stable release version 2.4.1:

** libgnutls: Don't crash when gnutls_credentials_set is called twice.

** libgnutls: Corrected memory leak in X.509 functions.
Thanks to Colin Leroy <colin at>.

** libgnutls: Fix compile error with Sun CC.

** gnutls-cli.1: Document all new parameters.
Thanks to James Westby <jw+debian at>.

** tests/openssl: initialize gnutls before use.
Fixes crash with libgcrypt 1.4.2.  Reported by Ludovic Courtes
<ludovic.courtes at>.

** doc/: Fix texinfo markup for old texinfo versions.

** Included copy of libtasn1 is upgraded to version 1.5.

** 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 (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-2.4.2.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: 2009-04-21]
      Key fingerprint = 0424 D4EE 81A0 E3D1 19C6  F835 EDA2 1E94 B565 716F
uid                  Simon Josefsson <simon at>
uid                  Simon Josefsson <jas at>
sub   1280R/4D5D40AE 2002-05-05 [expires: 2009-04-21]

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:

79f66b47cccf9700778218b5582969255d623dc2  gnutls-2.4.2.tar.bz2

b30dc032271a052e0e5e08df2050217f4d14d37f4f5b92985a2b85da  gnutls-2.4.2.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-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 1.4.2, libtasn1 1.5, and GnuTLS 2.4.2.

For more information about GnuTLS for Windows:

The Windows binary installer and PGP signature: (14MB)

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

4b7b5a268386dc0393094e7517730f8e77f381d7  gnutls-2.4.2.exe

fd1e6fa1abf4d3a9ab18ec83434aca55d78126f6b602452017a0adfb  gnutls-2.4.2.exe

Thanks to Enrico Tassi, we also have mingw32 *.deb's available:

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

d9dbb77b220f48a155723b3c3b5f05067df99ee7  mingw32-gnutls_2.4.2-1_all.deb

f7676ba8af27f47a2bab56c6e2e88129d6334c61eaf114c0eb5821b4  mingw32-gnutls_2.4.2-1_all.deb


GnuTLS messages have been translated into Dutch, 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, 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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