Internet DRAFT - draft-nemoto-idna2008-implementation-report
draft-nemoto-idna2008-implementation-report
Network Working Group T. NEMOTO
Internet-Draft Keio University
Intended status: Informational Y. YONEYA
Expires: August 29, 2013 JPRS
February 25, 2013
IDNA2008 implementation report
draft-nemoto-idna2008-implementation-report-02
Abstract
This document reports implementation experience of IDNA2008 and
findings from the implementation.
Status of this Memo
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This Internet-Draft will expire on August 29, 2013.
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1. Introduction
This document is a report of implementation experience to evaluate
whether IDNA2008 [RFC5890][RFC5891][RFC5892][RFC5893][RFC5894] can
implement, IDNA2008 implementation have Unicode agility, and
providing mapping methods based on [RFC5895] and [TR46] for
applications are useful.
In this document, two implementations based on IDNA2008 are
described. The one provides support functions for various
manipulations of internationalized domain names. It is to evaluate
whether core protocol of IDNA2008 can implement and the
implementation provides useful mappings for applications. The other
generates idnabis-tables.xml by using Unicode properties files. It
is to evaluate whether IDNA2008 implementation has Unicode agility.
This document reports implementation experience of IDNA2008 and
findings from the experience.
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2. Experience
2.1. Purposes
Purposes of the implementations are following;
o To evaluate whether core protocol of IDNA2008 can implement.
o To evaluate whether IDNA2008 implementation has Unicode agility.
o To evaluate whether providing mappings of [RFC5895] and [TR46] for
applications are useful.
2.2. Implementations
In this document, two implementations based on IDNA2008 are
described.
The one based on core protocol of IDNA2008 provides APIs for handling
internationalized domain names. Those APIs are for A/U-label
conversion, two labels comparison and label validity check. The
implementation is to evaluate whether core protocol of IDNA2008 can
be implemented and providing mappings for applications are useful.
The implementation also provide three command for convert, compare
and check of internationalized domain names for end users.
The implementation can import tables of certain version of Unicode
properties and corresponding idnabis-tables.xml for codepoint
validation.
The other implementation generates idnabis-tables.xml based on
[RFC5892] by using Unicode properties files. The idnabis-
tables.xml's format is the same as idnabis-tables.xml published by
IANA. This implementation is for the APIs can have Unicode agility
by using idnabis-tables. The generator is for evaluating latest
Unicode version before IANA publish idnabis-tables.xml for the
Unicode version.
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+----------------------------------------+
| Applications |
+----------------------------------------+
+-------------------------------------------+
|+--------+ +--------+ +--------+ +-------+ |
|| JAVA | | Python | | Perl | | | |
|| API | | API | | API | | | >APIs
|+--------+ +--------+ +--------+ | | | -convert
|+--------+ | | | | | | | (A <--> U)
|| | | Wrapper| | XS | | | | -compare
|| JNA | | | | | | | | (A/U <--> A/U)
|+--------+ +--------+ +--------+ | | | -check
|+--------------------------------+ | | (A/U --> Valid/Invalid)
|| | |
|| idnkit / idnkitlite (C/C++ API) | | +------------------------+
|| <------|Unicode properties files|
|+----------------------------------------+ | |IANA idnabis-tables.xml |
+-------------------------------------------+ +------------------------+
+----------------------------------------+ import files
| OS |
+----------------------------------------+
fig. components of the implementation[idnkit]
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3. Findings
Findings from implementation experiences are following.
o IDNA2008 core protocol [RFC5890][RFC5891]
[RFC5892][RFC5893][RFC5894] can implement.
o IDNA2008 implementation can have Unicode agility. Originally, it
complied with Unicode 5.2.0 based on [RFC5892]. And it is easily
complying with Unicode 6.0.0 based on [RFC6452]. Further, it can
comply with Unicode 6.1.0 by using the idnabis-tables.xml
generator.
o This implementation is able to choice a method of mappings based
on [RFC5895] or [TR46]. It is expected to improve the usability
of user input. And also it can facilitate the transition from
IDNA2003 to IDNA2008. But which is preferable mappings of
[RFC5895] or [TR46] is not determined yet.
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4. IANA Considerations
Unicode agility depends on the agility that IANA publishes the latest
idnabis-tables.xml when Unicode version was updated. IANA is
expected to publish the latest idnabis-tables.xml, when latest
Unicode version is published.
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5. Security Considerations
The implementation does not warn and handle strings with care when
input strings are consisted from mixed scripts. To avoid user's
confusion and unwanted access to phishing sites, the application
policy about user interface and the domain name registration policy
should take into consideration for using mixed scripts.
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6. Acknowledgment
Patrik Faltstrom provided a program to calculate Unicode codepoints
validity according to [RFC5892] and generate tables[createtables].
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7. References
7.1. Normative references
[RFC5890] Klensin, J., "Internationalized Domain Names for
Applications (IDNA): Definitions and Document Framework",
RFC 5890, August 2010.
[RFC5891] Klensin, J., "Internationalized Domain Names in
Applications (IDNA): Protocol", RFC 5891, August 2010.
[RFC5892] Faltstrom, P., "The Unicode Code Points and
Internationalized Domain Names for Applications (IDNA)",
RFC 5892, August 2010.
[RFC5893] Alvestrand, H. and C. Karp, "Right-to-Left Scripts for
Internationalized Domain Names for Applications (IDNA)",
RFC 5893, August 2010.
[RFC5894] Klensin, J., "Internationalized Domain Names for
Applications (IDNA): Background, Explanation, and
Rationale", RFC 5894, August 2010.
[RFC5895] Resnick, P. and P. Hoffman, "Mapping Characters for
Internationalized Domain Names in Applications (IDNA)
2008", RFC 5895, September 2010.
[RFC6452] Faltstrom, P. and P. Hoffman, "The Unicode Code Points and
Internationalized Domain Names for Applications (IDNA) -
Unicode 6.0", RFC 6452, November 2011.
[TR46] The Unicode Consortium, "Unicode Technical Standard #46",
http://www.unicode.org/reports/tr46/, 2012.
7.2. Informative references
[idnkit] "IDN Info by JPRS", http://jprs.co.jp/idn/index-e.html,
2012.
[createtables]
"IDNA", http://stupid.domain.name/idna, 2012.
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Appendix A. Change Log
A.1. Changes since -00
o Updated submission date to avoid expiration.
A.2. Changes since -01
o Updated submission date to avoid expiration.
o Modify the detes of references in the Section 7.2 "Informative
references".
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Authors' Addresses
Takahiro NEMOTO
Keio University
Graduate School of Media Design
4-1-1 Hiyoshi, Kohoku-ku
Yokohama, Kanagawa 223-8526
Japan
Phone: +81 45 564 2517
Email: t.nemo10@kmd.keio.ac.jp
Yoshiro YONEYA
JPRS
Chiyoda First Bldg. East 13F
3-8-1 Nishi-Kanda
Chiyoda-ku, Tokyo 101-0065
Japan
Phone: +81 3 5215 8451
Email: yoshiro.yoneya@jprs.co.jp
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