Extensible Authentication Protocol (EAP) Password Authenticated Exchange
RFC 4746
| Document | Type |
RFC - Informational
(November 2006; Errata)
Was draft-clancy-eap-pax (individual in sec area)
|
|
|---|---|---|---|
| Authors | Charles Clancy , William Arbaugh | ||
| Last updated | 2020-01-21 | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized with errata bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4746 (Informational) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Russ Housley | ||
| Send notices to | (None) | ||
Network Working Group T. Clancy
Request for Comments: 4746 LTS
Category: Informational W. Arbaugh
UMD
November 2006
Extensible Authentication Protocol (EAP)
Password Authenticated Exchange
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The IETF Trust (2006).
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
This document defines an Extensible Authentication Protocol (EAP)
method called EAP-PAX (Password Authenticated eXchange). This method
is a lightweight shared-key authentication protocol with optional
support for key provisioning, key management, identity protection,
and authenticated data exchange.
Table of Contents
1. Introduction ....................................................2
1.1. Language Requirements ......................................3
1.2. Terminology ................................................3
2. Overview ........................................................5
2.1. PAX_STD Protocol ...........................................6
2.2. PAX_SEC Protocol ...........................................7
2.3. Authenticated Data Exchange ................................9
2.4. Key Derivation ............................................10
2.5. Verification Requirements .................................11
2.6. PAX Key Derivation Function ...............................12
3. Protocol Specification .........................................13
3.1. Header Specification ......................................13
3.1.1. Op-Code ............................................13
3.1.2. Flags ..............................................14
Clancy & Arbaugh Informational [Page 1]
RFC 4746 EAP-PAX November 2006
3.1.3. MAC ID .............................................14
3.1.4. DH Group ID ........................................14
3.1.5. Public Key ID ......................................15
3.1.6. Mandatory to Implement .............................15
3.2. Payload Formatting ........................................16
3.3. Authenticated Data Exchange (ADE) .........................18
3.4. Integrity Check Value (ICV) ...............................19
4. Security Considerations ........................................19
4.1. Server Certificates .......................................20
4.2. Server Security ...........................................20
4.3. EAP Security Claims .......................................21
4.3.1. Protected Ciphersuite Negotiation ..................21
4.3.2. Mutual Authentication ..............................21
4.3.3. Integrity Protection ...............................21
4.3.4. Replay Protection ..................................21
4.3.5. Confidentiality ....................................21
4.3.6. Key Derivation .....................................21
4.3.7. Key Strength .......................................22
4.3.8. Dictionary Attack Resistance .......................22
4.3.9. Fast Reconnect .....................................22
4.3.10. Session Independence ..............................22
4.3.11. Fragmentation .....................................23
4.3.12. Channel Binding ...................................23
4.3.13. Cryptographic Binding .............................23
4.3.14. Negotiation Attack Prevention .....................23
5. IANA Considerations ............................................23
6. Acknowledgments ................................................24
7. References .....................................................24
7.1. Normative References ......................................24
7.2. Informative References ....................................25
Appendix A. Key Generation from Passwords ........................ 27
Appendix B. Implementation Suggestions ........................... 27
B.1. WiFi Enterprise Network ................................... 27
B.2. Mobile Phone Network ...................................... 28
1. Introduction
EAP-PAX (Password Authenticated eXchange) is an Extensible
Authentication Protocol (EAP) method [RFC3748] designed for
authentication using a shared key. It makes use of two separate
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