Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and Passwords
draft-ietf-precis-7613bis-07

Document Type Active Internet-Draft (precis WG)
Last updated 2017-05-01
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Network Working Group                                     P. Saint-Andre
Internet-Draft                                                  Filament
Obsoletes: 7613 (if approved)                                A. Melnikov
Intended status: Standards Track                               Isode Ltd
Expires: November 2, 2017                                    May 1, 2017

 Preparation, Enforcement, and Comparison of Internationalized Strings
                  Representing Usernames and Passwords
                      draft-ietf-precis-7613bis-07

Abstract

   This document describes updated methods for handling Unicode strings
   representing usernames and passwords.  The previous approach was
   known as SASLprep (RFC 4013) and was based on stringprep (RFC 3454).
   The methods specified in this document provide a more sustainable
   approach to the handling of internationalized usernames and
   passwords.  The preparation, enforcement, and comparison of
   internationalized strings (PRECIS) framework, RFC 7564, obsoletes RFC
   3454, and this document obsoletes RFC 7613.

Status of This Memo

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Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Saint-Andre & Melnikov  Expires November 2, 2017                [Page 1]
Internet-Draft       PRECIS: Usernames and Passwords            May 2017

   carefully, as they describe your rights and restrictions with respect
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Usernames . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Definition  . . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Case Mapping vs. Case Preservation  . . . . . . . . . . .   6
     3.3.  UsernameCaseMapped Profile  . . . . . . . . . . . . . . .   7
       3.3.1.  Rules . . . . . . . . . . . . . . . . . . . . . . . .   7
       3.3.2.  Preparation . . . . . . . . . . . . . . . . . . . . .   8
       3.3.3.  Enforcement . . . . . . . . . . . . . . . . . . . . .   8
       3.3.4.  Comparison  . . . . . . . . . . . . . . . . . . . . .   8
     3.4.  UsernameCasePreserved Profile . . . . . . . . . . . . . .   9
       3.4.1.  Rules . . . . . . . . . . . . . . . . . . . . . . . .   9
       3.4.2.  Preparation . . . . . . . . . . . . . . . . . . . . .   9
       3.4.3.  Enforcement . . . . . . . . . . . . . . . . . . . . .   9
       3.4.4.  Comparison  . . . . . . . . . . . . . . . . . . . . .  10
     3.5.  Application-Layer Constructs  . . . . . . . . . . . . . .  10
     3.6.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Passwords . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     4.1.  Definition  . . . . . . . . . . . . . . . . . . . . . . .  12
     4.2.  OpaqueString Profile  . . . . . . . . . . . . . . . . . .  13
       4.2.1.  Preparation . . . . . . . . . . . . . . . . . . . . .  13
       4.2.2.  Enforcement . . . . . . . . . . . . . . . . . . . . .  14
       4.2.3.  Comparison  . . . . . . . . . . . . . . . . . . . . .  14
     4.3.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .  15
   5.  Use in Application Protocols  . . . . . . . . . . . . . . . .  16
   6.  Migration . . . . . . . . . . . . . . . . . . . . . . . . . .  16
     6.1.  Usernames . . . . . . . . . . . . . . . . . . . . . . . .  16
     6.2.  Passwords . . . . . . . . . . . . . . . . . . . . . . . .  18
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
     7.1.  UsernameCaseMapped Profile  . . . . . . . . . . . . . . .  19
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