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 call. 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 included. 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 http://josefsson.org/ for more details. The project page of the library is available at: https://www.gnu.org/software/libidn/ All manual formats are available from: https://www.gnu.org/software/libidn/manual/ Specifically, the following formats are available. The main manual: https://www.gnu.org/software/libidn/manual/libidn.html - HTML format https://www.gnu.org/software/libidn/manual/libidn.pdf - PDF format API Reference manual: https://www.gnu.org/software/libidn/reference/intro.html - GTK-DOC HTML https://www.gnu.org/software/libidn/reference/libidn.pdf - GTK-DOC PDF Doxygen documentation: https://www.gnu.org/software/libidn/doxygen/index.html - HTML format https://www.gnu.org/software/libidn/doxygen/libidn.pdf - PDF format JavaDoc output for the Java API: https://www.gnu.org/software/libidn/javadoc/ If you need help to use Libidn, or want to help others, you are invited to join our help-libidn mailing list, see: https://lists.gnu.org/mailman/listinfo/help-libidn Here are the compressed sources (3.3MB): ftp://ftp.gnu.org/gnu/libidn/libidn-1.27.tar.gz http://ftp.gnu.org/gnu/libidn/libidn-1.27.tar.gz Here are GPG detached signatures: ftp://ftp.gnu.org/gnu/libidn/libidn-1.27.tar.gz.sig http://ftp.gnu.org/gnu/libidn/libidn-1.27.tar.gz.sig 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/libidn4win.mk, for 32-bit and 64-bit x86 architecures: ftp://ftp.gnu.org/gnu/libidn/libidn-1.27-win32.zip ftp://ftp.gnu.org/gnu/libidn/libidn-1.27-win32.zip.sig ftp://ftp.gnu.org/gnu/libidn/libidn-1.27-win64.zip ftp://ftp.gnu.org/gnu/libidn/libidn-1.27-win64.zip.sig Here are the SHA-1 and SHA-224 signatures: 08fd62bf76bbf14a6e5801d070d5aa8d0ca56d9c libidn-1.27-win32.zip fbc1910de2a92cccc03608b4ca11bf507cc9a17ad028be6697ce9862 libidn-1.27-win32.zip c1951e094d18b1eb7ae01271feb96c7cdb2f3568 libidn-1.27-win64.zip 6c18c694e99e69abc031c919f8beb51b96248ee4ca967c0e09358edc libidn-1.27-win64.zip 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 <si...@josefsson.org> 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: http://josefsson.org/key.txt dns:b565716f.josefsson.org?TYPE=CERT Code coverage, clang-analyzer output, and cyclomatic code complexity charts: https://www.gnu.org/software/libidn/coverage/ https://www.gnu.org/software/libidn/clang-analyzer/ https://www.gnu.org/software/libidn/cyclo/ Happy hacking, Simon
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