Towards Remote Procedure Call Encryption By Default
draft-ietf-nfsv4-rpc-tls-10
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Active Internet-Draft (nfsv4 WG)
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Authors |
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Trond Myklebust
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Chuck Lever
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Last updated |
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2020-11-09
(latest revision 2020-10-31)
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draft-cel-nfsv4-rpc-tls
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IETF
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Intended RFC status |
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Proposed Standard
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Submitted to IESG for Publication
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Document shepherd |
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David Noveck
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(last changed 2020-02-12)
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Magnus Westerlund
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Send notices to |
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IANA expert review comments |
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"The terminology in the document is not quite aligned with RFC 5280. I'd like to work with the authors to fix it."
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MISSREF
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Network File System Version 4 T. Myklebust
Internet-Draft Hammerspace
Updates: 5531 (if approved) C. Lever, Ed.
Intended status: Standards Track Oracle
Expires: 4 May 2021 31 October 2020
Towards Remote Procedure Call Encryption By Default
draft-ietf-nfsv4-rpc-tls-10
Abstract
This document describes a mechanism that, through the use of
opportunistic Transport Layer Security (TLS), enables encryption of
Remote Procedure Call (RPC) transactions while they are in-transit.
The proposed mechanism interoperates with ONC RPC implementations
that do not support it. This document updates RFC 5531.
Note
Discussion of this draft takes place on the NFSv4 working group
mailing list (nfsv4@ietf.org), which is archived at
https://mailarchive.ietf.org/arch/browse/nfsv4/. Working Group
information can be found at https://datatracker.ietf.org/wg/nfsv4/
about/.
This note is to be removed before publishing as an RFC.
The source for this draft is maintained in GitHub. Suggested changes
should be submitted as pull requests at
https://github.com/chucklever/i-d-rpc-tls. Instructions are on that
page as well.
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."
Myklebust & Lever Expires 4 May 2021 [Page 1]
Internet-Draft RPC-Over-TLS October 2020
This Internet-Draft will expire on 4 May 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 (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 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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 5
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. RPC-Over-TLS in Operation . . . . . . . . . . . . . . . . . . 5
4.1. Discovering Server-side TLS Support . . . . . . . . . . . 6
4.2. Authentication . . . . . . . . . . . . . . . . . . . . . 7
4.2.1. Using TLS with RPCSEC GSS . . . . . . . . . . . . . . 8
5. TLS Requirements . . . . . . . . . . . . . . . . . . . . . . 8
5.1. Base Transport Considerations . . . . . . . . . . . . . . 9
5.1.1. Protected Operation on TCP . . . . . . . . . . . . . 10
5.1.2. Protected Operation on UDP . . . . . . . . . . . . . 10
5.1.3. Protected Operation on Other Transports . . . . . . . 11
5.2. TLS Peer Authentication . . . . . . . . . . . . . . . . . 12
5.2.1. X.509 Certificates Using PKIX Trust . . . . . . . . . 12
5.2.2. Pre-Shared Keys . . . . . . . . . . . . . . . . . . . 14
6. Implementation Status . . . . . . . . . . . . . . . . . . . . 14
6.1. DESY NFS server . . . . . . . . . . . . . . . . . . . . . 14
6.2. Hammerspace NFS server . . . . . . . . . . . . . . . . . 15
6.3. Linux NFS server and client . . . . . . . . . . . . . . . 15
6.4. FreeBSD NFS server and client . . . . . . . . . . . . . . 15
7. Security Considerations . . . . . . . . . . . . . . . . . . . 16
7.1. The Limitations of Opportunistic Security . . . . . . . . 16
7.1.1. STRIPTLS Attacks . . . . . . . . . . . . . . . . . . 17
7.1.2. Privacy Leakage Before Session Establishment . . . . 17
7.2. TLS Identity Management on Clients . . . . . . . . . . . 18
7.3. Security Considerations for AUTH_SYS on TLS . . . . . . . 18
7.4. Best Security Policy Practices . . . . . . . . . . . . . 19
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
8.1. RPC Authentication Flavor . . . . . . . . . . . . . . . . 19
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