Handling Large Certificates and Long Certificate Chains in TLS-based EAP Methods
draft-ietf-emu-eaptlscert-08
| Document | Type | Active Internet-Draft (emu WG) | ||
|---|---|---|---|---|
| Authors | Mohit Sethi , John Preuß Mattsson , Sean Turner | |||
| Last updated | 2021-01-12 (latest revision 2020-11-20) | |||
| Replaces | draft-ms-emu-eaptlscert | |||
| Stream | Internent Engineering Task Force (IETF) | |||
| Intended RFC status | Informational | |||
| Formats | plain text xml pdf htmlized (tools) htmlized bibtex | |||
| Reviews | ||||
| Stream | WG state | Submitted to IESG for Publication (wg milestone: Nov 2019 - WG last call on oper... ) | ||
| Document shepherd | Joseph Salowey | |||
| Shepherd write-up | Show (last changed 2020-08-26) | |||
| IESG | IESG state | RFC Ed Queue | ||
| Action Holders |
(None)
|
|||
| Consensus Boilerplate | Yes | |||
| Telechat date | ||||
| Responsible AD | Roman Danyliw | |||
| Send notices to | Joseph Salowey <joe@salowey.net> | |||
| IANA | IANA review state | IANA OK - No Actions Needed | ||
| IANA action state | No IANA Actions | |||
| RFC Editor | RFC Editor state | MISSREF | ||
| Details | ||||
Network Working Group M. Sethi
Internet-Draft J. Mattsson
Intended status: Informational Ericsson
Expires: May 24, 2021 S. Turner
sn3rd
November 20, 2020
Handling Large Certificates and Long Certificate Chains
in TLS-based EAP Methods
draft-ietf-emu-eaptlscert-08
Abstract
The Extensible Authentication Protocol (EAP), defined in RFC3748,
provides a standard mechanism for support of multiple authentication
methods. EAP-Transport Layer Security (EAP-TLS) and other TLS-based
EAP methods are widely deployed and used for network access
authentication. Large certificates and long certificate chains
combined with authenticators that drop an EAP session after only 40 -
50 round-trips is a major deployment problem. This document looks at
this problem in detail and describes the potential solutions
available.
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
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 24, 2021.
Copyright Notice
Copyright (c) 2020 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
Sethi, et al. Expires May 24, 2021 [Page 1]
Internet-Draft Certificates in TLS-based EAP Methods November 2020
(https://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
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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 . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Experience with Deployments . . . . . . . . . . . . . . . . . 4
4. Handling of Large Certificates and Long Certificate Chains . 5
4.1. Updating Certificates and Certificate Chains . . . . . . 5
4.1.1. Guidelines for Certificates . . . . . . . . . . . . . 6
4.1.2. Pre-distributing and Omitting CA certificates . . . . 7
4.1.3. Using Fewer Intermediate Certificates . . . . . . . . 7
4.2. Updating TLS and EAP-TLS Code . . . . . . . . . . . . . . 7
4.2.1. URLs for Client Certificates . . . . . . . . . . . . 7
4.2.2. Caching Certificates . . . . . . . . . . . . . . . . 8
4.2.3. Compressing Certificates . . . . . . . . . . . . . . 8
4.2.4. Compact TLS 1.3 . . . . . . . . . . . . . . . . . . . 9
4.2.5. Suppressing Intermediate Certificates . . . . . . . . 9
4.2.6. Raw Public Keys . . . . . . . . . . . . . . . . . . . 9
4.2.7. New Certificate Types and Compression Algorithms . . 10
4.3. Updating Authenticators . . . . . . . . . . . . . . . . . 10
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
6. Security Considerations . . . . . . . . . . . . . . . . . . . 11
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1. Normative References . . . . . . . . . . . . . . . . . . 11
7.2. Informative References . . . . . . . . . . . . . . . . . 12
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction
The Extensible Authentication Protocol (EAP), defined in [RFC3748],
provides a standard mechanism for support of multiple authentication
methods. EAP-Transport Layer Security (EAP-TLS) [RFC5216]
[I-D.ietf-emu-eap-tls13] relies on TLS [RFC8446] to provide strong
mutual authentication with certificates [RFC5280] and is widely
deployed and often used for network access authentication. There are
also many other TLS-based EAP methods, such as Flexible
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