Using compression in the Internet Key Exchange Protocol Version 2 (IKEv2)
draft-smyslov-ipsecme-ikev2-compression-04

Document Type Active Internet-Draft (individual)
Last updated 2017-09-07
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                         V. Smyslov
Internet-Draft                                                ELVIS-PLUS
Intended status: Standards Track                       September 7, 2017
Expires: March 11, 2018

   Using compression in the Internet Key Exchange Protocol Version 2
                                (IKEv2)
               draft-smyslov-ipsecme-ikev2-compression-04

Abstract

   This document describes a method for reducing the size of the IKEv2
   messages by using lossless compression.  Making IKEv2 messages
   smaller is desirable for low power consumption battery powered
   devices.  It also helps to avoid IP fragmentation of IKEv2 messages.
   This document describes how compression is negotiated maintaining
   backward compatibility and how it is used in IKEv2.

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 http://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 March 11, 2018.

Copyright Notice

   Copyright (c) 2017 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

Smyslov                  Expires March 11, 2018                 [Page 1]
Internet-Draft            Compression in IKEv2            September 2017

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Protocol Description  . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Using Compression in the IKE_SA_INIT Exchange . . . . . .   4
     3.2.  Using Compression in Subsequent Exchanges . . . . . . . .   6
   4.  Payload Formats . . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Compressed Payload  . . . . . . . . . . . . . . . . . . .   7
     4.2.  INVALID_COMPRESSION_ALGORITHM Notification  . . . . . . .   8
   5.  Interaction with other IKEv2 Extensions . . . . . . . . . . .   8
     5.1.  Interaction with IKEv2 Fragmentation  . . . . . . . . . .   9
     5.2.  Interaction with IKEv2 Resumption . . . . . . . . . . . .   9
     5.3.  Interaction with IKEv2 Redirect . . . . . . . . . . . . .   9
     5.4.  Interaction with IKEv2 Puzzles  . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   The Internet Key Exchange protocol version 2 (IKEv2) defined in
   [RFC7296] is used in the IP Security (IPsec) architecture for the
   purposes of Security Association (SA) parameters negotiation and
   authenticated key exchange.  The protocol uses UDP as a transport for
   its messages.  The size of the IKEv2 messages varies from hundreds
   bytes to several kBytes.

   Sending large UDP messages may cause IP fragmentation to take place,
   which may interact badly with some Network Address Translators (NAT).
   One of the possible solutions to the problem is IKEv2 fragmentation
   described in [RFC7383].  However, the IKEv2 fragmentation cannot be
   used for unencrypted messages and thus cannot be used in the initial
   IKEv2 exchange (IKE_SA_INIT).  Usually the messages of the
   IKE_SA_INIT exchange are relatively small and this restriction
   doesn't cause problems.  However with adoption more and more new
   algorithms and new IKEv2 extensions there is a tendency for these
Show full document text