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Libidn 1.27 released

From: Simon Josefsson
Subject: Libidn 1.27 released
Date: Wed, 05 Jun 2013 22:51:35 +0200
User-agent: Gnus/5.130006 (Ma Gnus v0.6) Emacs/24.3 (gnu/linux)

GNU Libidn is a fully documented implementation of the Stringprep,
Punycode and IDNA specifications.  Libidn's purpose is to encode and
decode internationalized domain name strings.  There are native C, C#
and Java libraries.

Noteworthy changes since the last release (from NEWS file):

* Version 1.27 (released 2013-06-05) [stable]

** Java library can be built using Maven.  Speed improvements.
Thanks to several patches from Stefan Larsson.  Testing indicate 70-90
times faster node/name/resource-prep.

** Update gnulib files and translations.

** API and ABI is backwards compatible with the previous version.

The C library contains a generic Stringprep implementation.  Profiles
for Nameprep, iSCSI, SASL, XMPP and Kerberos V5 are included.
Punycode and ASCII Compatible Encoding (ACE) via IDNA are supported.
A mechanism to define Top-Level Domain (TLD) specific validation
tables, and to compare strings against those tables, is included.
Default tables for some TLDs are also included.

The Stringprep API consists of two main functions, one for converting
data from the system's native representation into UTF-8, and one
function to perform the Stringprep processing.  Adding a new
Stringprep profile for your application within the API is
straightforward.  The Punycode API consists of one encoding function
and one decoding function.  The IDNA API consists of the ToASCII and
ToUnicode functions, as well as an high-level interface for converting
entire domain names to and from the ACE encoded form.  The TLD API
consists of one set of functions to extract the TLD name from a domain
string, one set of functions to locate the proper TLD table to use
based on the TLD name, and core functions to validate a string against
a TLD table, and some utility wrappers to perform all the steps in one

Libidn is developed for the GNU/Linux system, but runs on over 20 Unix
platforms (including Solaris, IRIX, AIX, and Tru64) and Windows.  The
library is written in C and (parts of) the API is also accessible from
C++, Emacs Lisp, Python and Java.  A native Java and C# port is

Also included is a command line tool, several self tests, code
examples, and more.

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

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

The project page of the library is available at:

All manual formats are available from:

Specifically, the following formats are available.

The main manual: - HTML format - PDF format

API Reference manual: - GTK-DOC HTML - GTK-DOC PDF

Doxygen documentation: - HTML format - PDF format

JavaDoc output for the Java API:

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

Here are the compressed sources (3.3MB):

Here are GPG detached signatures:

Here are the SHA-1 and SHA-224 signatures:

67364d0cc331f2ea93f09a1b436dc606db16ad4d  libidn-1.27.tar.gz
2ec8e020380f180bda6ba482716b7d619963de1b27e2fb680fb5857e  libidn-1.27.tar.gz

We also provide Windows binaries built using MinGW-w64 with the build
script windows/, for 32-bit and 64-bit x86 architecures:

Here are the SHA-1 and SHA-224 signatures:



The software is cryptographically signed by the author using an OpenPGP
key identified by the following information:

pub   1280R/B565716F 2002-05-05 [expires: 2014-05-11]
      Key fingerprint = 0424 D4EE 81A0 E3D1 19C6  F835 EDA2 1E94 B565 716F
uid                  Simon Josefsson <address@hidden>
sub   2048R/105E722E 2012-03-13 [expires: 2013-07-26]
sub   2048R/728AB82C 2012-03-13 [expires: 2013-07-26]
sub   2048R/9394F626 2012-03-13 [expires: 2013-07-26]
sub   1280R/4D5D40AE 2002-05-05 [expires: 2014-05-11]

The key is available from:

Code coverage, clang-analyzer output, and cyclomatic code complexity charts:

Happy hacking,

Attachment: pgpQPDwzGBn6j.pgp
Description: PGP signature

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