Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and Passwords
RFC 7613
| Document | Type |
RFC - Proposed Standard
(August 2015; No errata)
Obsoleted by RFC 8265
Obsoletes RFC 4013
|
|
|---|---|---|---|
| Authors | Peter Saint-Andre , Alexey Melnikov | ||
| Last updated | 2015-10-14 | ||
| Replaces | draft-melnikov-precis-saslprepbis | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Matthew Miller | ||
| Shepherd write-up | Show (last changed 2015-03-23) | ||
| IESG | IESG state | RFC 7613 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Barry Leiba | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) P. Saint-Andre
Request for Comments: 7613 &yet
Obsoletes: 4013 A. Melnikov
Category: Standards Track Isode Ltd
ISSN: 2070-1721 August 2015
Preparation, Enforcement, and Comparison of Internationalized Strings
Representing Usernames and Passwords
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 4013.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7613.
Saint-Andre & Melnikov Standards Track [Page 1]
RFC 7613 PRECIS: Usernames and Passwords August 2015
Copyright Notice
Copyright (c) 2015 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
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Saint-Andre & Melnikov Standards Track [Page 2]
RFC 7613 PRECIS: Usernames and Passwords August 2015
Table of Contents
1. Introduction ....................................................4
2. Terminology .....................................................5
3. Usernames .......................................................6
3.1. Definition .................................................6
3.2. UsernameCaseMapped Profile .................................7
3.2.1. Preparation .........................................7
3.2.2. Enforcement .........................................7
3.2.3. Comparison ..........................................8
3.3. UsernameCasePreserved Profile ..............................8
3.3.1. Preparation .........................................8
3.3.2. Enforcement .........................................8
3.3.3. Comparison ..........................................9
3.4. Case Mapping vs. Case Preservation .........................9
3.5. Application-Layer Constructs ..............................10
3.6. Examples ..................................................11
4. Passwords ......................................................13
4.1. Definition ................................................13
4.2. OpaqueString Profile ......................................14
4.2.1. Preparation ........................................14
4.2.2. Enforcement ........................................14
4.2.3. Comparison .........................................15
4.3. Examples ..................................................15
5. Use in Application Protocols ...................................16
6. Migration ......................................................16
6.1. Usernames .................................................17
6.2. Passwords .................................................18
7. IANA Considerations ............................................19
7.1. UsernameCaseMapped Profile ................................19
7.2. UsernameCasePreserved Profile .............................20
7.3. OpaqueString Profile ......................................20
7.4. Stringprep Profile ........................................21
8. Security Considerations ........................................21
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