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Versions: (draft-ietf-pkix-eai-addresses) 00 01 02 03 04 draft-ietf-lamps-eai-addresses

Network Working Group                                   A. Melnikov, Ed.
Internet-Draft                                                 Isode Ltd
Intended status: Standards Track                            May 21, 2016
Expires: November 22, 2016


        Internationalized Email Addresses in X.509 certificates
               draft-melnikov-spasm-eai-addresses-00.txt

Abstract

   This document defines a new name form for inclusion in the otherName
   field of an X.509 Subject Alternative Name extension that allows a
   certificate subject to be associated with an Internationalized Email
   Address.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on November 22, 2016.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
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   described in the Simplified BSD License.




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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   2
   3.  Name Definitions  . . . . . . . . . . . . . . . . . . . . . .   2
   4.  Matching of Internationalized Email Addresses in X.509
       certificates  . . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .   4
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   [RFC5280] defines rfc822Name subjectAltName choice for representing
   [RFC5322] email addresses.  This form is restricted to a subset of
   US-ASCII characters and thus can't be used to represent
   Internationalized Email addresses [RFC6531].

2.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

   The formal syntax use the Augmented Backus-Naur Form (ABNF) [RFC5234]
   notation.

3.  Name Definitions

   This section defines the eaiName name as a form of otherName from the
   GeneralName structure in SubjectAltName defined in [RFC5280].

   id-on-eaiAddr OBJECT IDENTIFIER ::= { id-on XXX }

   eaiName ::= UTF8String (SIZE (1..MAX))

   When the subjectAltName extension contains an Internationalized Email
   address, the address MUST be stored in the eaiName name form of
   otherName.  The format of an eaiName is a <eaiMailbox> as defined
   below.  A eaiMailbox has the form "uLocal-part@uDomain".  Note that a
   eaiMailbox has no phrase (such as a common name) before it, has no
   comment (text surrounded in parentheses) after it, and is not
   surrounded by "<" and ">".




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   eaiMailbox = uLocal-part "@" uDomain

   uLocal-part and uDomain are defined in [RFC6531].  [[CREF1: Alexey:
   uLocal-part and uDomain are no longer in RFC 6531, so we need to
   write explicit rules]]

4.  Matching of Internationalized Email Addresses in X.509 certificates

   The <uLocal-part> part of an Internationalized email address is in
   UTF-8 and need to be compared octet for octet.

   The <uDomain> can contain either IDN domain or an ASCII Compatible
   Encoding (ACE) format.  When comparing two <uDomain>s both MUST be
   converted to the ACE form as described in section 7.2 of [RFC5280].

5.  IANA Considerations

   [[CREF2: Just need a new OID.]]

6.  Security Considerations

   [[CREF3: TBD]]

7.  References

7.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

   [RFC3629]  Yergeau, F., "UTF-8, a transformation format of ISO
              10646", STD 63, RFC 3629, DOI 10.17487/RFC3629, November
              2003, <http://www.rfc-editor.org/info/rfc3629>.

   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
              Specifications: ABNF", STD 68, RFC 5234,
              DOI 10.17487/RFC5234, January 2008,
              <http://www.rfc-editor.org/info/rfc5234>.

   [RFC5280]  Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
              Housley, R., and W. Polk, "Internet X.509 Public Key
              Infrastructure Certificate and Certificate Revocation List
              (CRL) Profile", RFC 5280, DOI 10.17487/RFC5280, May 2008,
              <http://www.rfc-editor.org/info/rfc5280>.





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   [RFC6531]  Yao, J. and W. Mao, "SMTP Extension for Internationalized
              Email", RFC 6531, DOI 10.17487/RFC6531, February 2012,
              <http://www.rfc-editor.org/info/rfc6531>.

7.2.  Informative References

   [RFC5322]  Resnick, P., Ed., "Internet Message Format", RFC 5322,
              DOI 10.17487/RFC5322, October 2008,
              <http://www.rfc-editor.org/info/rfc5322>.

Appendix A.  Acknowledgements

   Thank you to Magnus Nystrom for motivating this document.

Author's Address

   Alexey Melnikov (editor)
   Isode Ltd
   14 Castle Mews
   Hampton, Middlesex  TW12 2NP
   UK

   Email: Alexey.Melnikov@isode.com




























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