Extensible Authentication Protocol (EAP) Authentication Using Only a Password
RFC 5931
Document | Type |
RFC - Informational
(August 2010; Errata)
Updated by RFC 8146
Was draft-harkins-emu-eap-pwd (individual in gen area)
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Authors | Glen Zorn , Dan Harkins | ||
Last updated | 2020-01-21 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5931 (Informational) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Russ Housley | ||
Send notices to | gwz@netcube.com |
Internet Engineering Task Force (IETF) D. Harkins Request for Comments: 5931 Aruba Networks Category: Informational G. Zorn ISSN: 2070-1721 Network Zen August 2010 Extensible Authentication Protocol (EAP) Authentication Using Only a Password Abstract This memo describes an Extensible Authentication Protocol (EAP) method, EAP-pwd, which uses a shared password for authentication. The password may be a low-entropy one and may be drawn from some set of possible passwords, like a dictionary, which is available to an attacker. The underlying key exchange is resistant to active attack, passive attack, and dictionary attack. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. 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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc5931. Harkins & Zorn Informational [Page 1] RFC 5931 EAP Password August 2010 Copyright Notice Copyright (c) 2010 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. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1. Background . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2. Keyword Definitions . . . . . . . . . . . . . . . . . . . 4 1.3. Requirements . . . . . . . . . . . . . . . . . . . . . . . 4 1.3.1. Resistance to Passive Attack . . . . . . . . . . . . . 4 1.3.2. Resistance to Active Attack . . . . . . . . . . . . . 5 1.3.3. Resistance to Dictionary Attack . . . . . . . . . . . 5 1.3.4. Forward Secrecy . . . . . . . . . . . . . . . . . . . 5 2. Specification of EAP-pwd . . . . . . . . . . . . . . . . . . . 5 2.1. Notation . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2. Discrete Logarithm Cryptography . . . . . . . . . . . . . 7 2.2.1. Finite Field Cryptography . . . . . . . . . . . . . . 7 2.2.2. Elliptic Curve Cryptography . . . . . . . . . . . . . 8 2.3. Assumptions . . . . . . . . . . . . . . . . . . . . . . . 9 2.4. Instantiating the Random Function . . . . . . . . . . . . 9 2.5. Key Derivation Function . . . . . . . . . . . . . . . . . 10 2.6. Random Numbers . . . . . . . . . . . . . . . . . . . . . . 10 2.7. Representation and Processing of Input Strings . . . . . . 11 2.7.1. Identity Strings . . . . . . . . . . . . . . . . . . . 11 Harkins & Zorn Informational [Page 2] RFC 5931 EAP Password August 2010 2.7.2. Passwords . . . . . . . . . . . . . . . . . . . . . . 11 2.8. Protocol . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.8.1. Overview . . . . . . . . . . . . . . . . . . . . . . . 12 2.8.2. Message Flows . . . . . . . . . . . . . . . . . . . . 12Show full document text