IPsec Extensions to Support Robust Header Compression over IPsec
RFC 5858

Internet Engineering Task Force (IETF)                        E. Ertekin
Request for Comments: 5858                                   C. Christou
Category: Standards Track                            Booz Allen Hamilton
ISSN: 2070-1721                                               C. Bormann
                                                 Universitaet Bremen TZI
                                                                May 2010

    IPsec Extensions to Support Robust Header Compression over IPsec

Abstract

   Integrating Robust Header Compression (ROHC) with IPsec (ROHCoIPsec)
   offers the combined benefits of IP security services and efficient
   bandwidth utilization.  However, in order to integrate ROHC with
   IPsec, extensions to the Security Policy Database (SPD) and Security
   Association Database (SAD) are required.  This document describes the
   IPsec extensions required to support ROHCoIPsec.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc5858.

Ertekin, et al.              Standards Track                    [Page 1]
RFC 5858         IPsec Extensions to Support ROHCoIPsec         may 2010

Copyright Notice

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   document authors.  All rights reserved.

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Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
   3. Extensions to IPsec Databases ...................................3
      3.1. Security Policy Database (SPD) .............................4
      3.2. Security Association Database (SAD) ........................5
   4. Extensions to IPsec Processing ..................................6
      4.1. Identification of Header-Compressed Traffic ................6
      4.2. Verifying the Integrity of Decompressed Packet Headers .....6
           4.2.1. ICV Computation and Integrity Verification ..........7
      4.3. ROHC Segmentation and IPsec Tunnel MTU .....................8
      4.4. Nested IPComp and ROHCoIPsec Processing ....................9
   5. Security Considerations ........................................10
   6. IANA Considerations ............................................10
   7. Acknowledgments ................................................11
   Appendix A. ASN.1 Representation for ROHCoIPsec ...................12
   8. References .....................................................14
      8.1. Normative References ......................................14
      8.2. Informative References ....................................14

Ertekin, et al.              Standards Track                    [Page 2]
RFC 5858         IPsec Extensions to Support ROHCoIPsec         may 2010

1.  Introduction

   Using IPsec ([IPSEC]) protection offers various security services for
   IP traffic.  However, these benefits come at the cost of additional
   packet headers, which increase packet overhead.  By compressing the