GnuTLS 2.10.1 released

Simon Josefsson simon at
Sun Jul 25 13:59:08 CEST 2010

We are proud to announce a new stable GnuTLS release: Version 2.10.1.

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: Added support for broken certificates that indicate RSA
with strange OIDs.

** gnutls-cli: Allow verification using V1 CAs.

** libgnutls: gnutls_x509_privkey_import() will fallback to
gnutls_x509_privkey_import_pkcs8() without a password, if it
is unable to decode the key.

** libgnutls: Correctly deinitialize crypto API functions to prevent
a memory leak. Reported by Mads Kiilerich.

** certtool: If asked to generate DSA keys of size more than 1024 bits,
issue a warning, that the output key might not be working everywhere.

** certtool: The --pkcs-cipher is taken into account when generating a
private key. The default cipher used now is aes-128. The old behavior can
be simulated by specifying "--pkcs-cipher 3des-pkcs12".

** 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 (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-2.10.1.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:

507ff8ad7c1e042f8ecaa4314f32777e74caf0d3  gnutls-2.10.1.tar.bz2

4024b69acc70cb7e105742f8ad26bf68b7dc0e07657efbbaaf23d0bd  gnutls-2.10.1.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 installer
contains libgpg-error v1.8, libgcrypt v1.4.6, libtasn1 v2.7, and
GnuTLS v2.10.1.

For more information about GnuTLS for Windows:

The Windows binary installer and PGP signature: (17MB)

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

f4f0c86ef9761c65941fc53713d17938ac450b3c  gnutls-2.10.1.exe

cd2f69c8e271e26187cb3e64dc179df5f28e8d1b7e5f9d97a7e222fc  gnutls-2.10.1.exe

A ZIP archive containing the Windows binaries: (5.6MB)

A Debian mingw32 package is also available: (5.0MB)

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



0ff1c0c1ded86a5054dd7bcd7b29629afe3169a9  mingw32-gnutls_2.10.1-1_all.deb

066502f2fae542e6c80433090070ef46f02e5a71c80ca4f53b450ac9  mingw32-gnutls_2.10.1-1_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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