Bundle Protocol Security Specification
draft-ietf-dtn-bpsec-13

Document Type Active Internet-Draft (dtn WG)
Last updated 2019-11-26 (latest revision 2019-11-04)
Replaces draft-birrane-dtn-sbsp
Stream IETF
Intended RFC status Proposed Standard
Formats plain text xml pdf htmlized bibtex
Reviews
Stream WG state Submitted to IESG for Publication (wg milestone: Jul 2019 - Bundle Security Prot... )
Document shepherd Scott Burleigh
Shepherd write-up Show (last changed 2019-06-19)
IESG IESG state Waiting for AD Go-Ahead::External Party
Consensus Boilerplate Yes
Telechat date
Responsible AD Magnus Westerlund
Send notices to Scott Burleigh <Scott.C.Burleigh@jpl.nasa.gov>
IANA IANA review state IANA OK - Actions Needed
IANA expert review state Expert Reviews OK
IANA expert review comments An update on this assignment: we have converged on the registry questions in the new Bundle Protocol specification, agreeing to register new BPv7 block type numbers in the existing Bundle Block Types registry rather than starting up a new registry for BPv7 block types. This means that block type numbers 2 and 3 -- originally requested for the BPsec BIB and BCB blocks -- are not available (they are used by the old Bundle Authentication Block and Payload Integrity Block), so we must assign from one of the unassigned ranges. The BPbis specification requests that block types 11 and 12 be reserved for the Block Integrity Block and Block Confidentiality Block respectively, so those are the values that I would propose we assign. My understanding is that a slightly revised BPsec Internet Draft will be posted that simply requests that IANA assign numbers for these two blocks, without specifically asking for any particular values, so in the end I think there will be no conflict.
Delay-Tolerant Networking                                     E. Birrane
Internet-Draft                                               K. McKeever
Intended status: Standards Track                                 JHU/APL
Expires: May 7, 2020                                    November 4, 2019

                 Bundle Protocol Security Specification
                        draft-ietf-dtn-bpsec-13

Abstract

   This document defines a security protocol providing end to end data
   integrity and confidentiality services for the Bundle Protocol.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 7, 2020.

Copyright Notice

   Copyright (c) 2019 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
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Birrane & McKeever         Expires May 7, 2020                  [Page 1]
Internet-Draft   Bundle Protocol Security Specification    November 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Supported Security Services . . . . . . . . . . . . . . .   3
     1.2.  Specification Scope . . . . . . . . . . . . . . . . . . .   4
     1.3.  Related Documents . . . . . . . . . . . . . . . . . . . .   5
     1.4.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   6
   2.  Design Decisions  . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Block-Level Granularity . . . . . . . . . . . . . . . . .   7
     2.2.  Multiple Security Sources . . . . . . . . . . . . . . . .   8
     2.3.  Mixed Security Policy . . . . . . . . . . . . . . . . . .   8
     2.4.  User-Defined Security Contexts  . . . . . . . . . . . . .   9
     2.5.  Deterministic Processing  . . . . . . . . . . . . . . . .   9
   3.  Security Blocks . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Block Definitions . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Uniqueness  . . . . . . . . . . . . . . . . . . . . . . .  10
     3.3.  Target Multiplicity . . . . . . . . . . . . . . . . . . .  11
     3.4.  Target Identification . . . . . . . . . . . . . . . . . .  11
     3.5.  Block Representation  . . . . . . . . . . . . . . . . . .  12
     3.6.  Abstract Security Block . . . . . . . . . . . . . . . . .  12
     3.7.  Block Integrity Block . . . . . . . . . . . . . . . . . .  15
     3.8.  Block Confidentiality Block . . . . . . . . . . . . . . .  16
     3.9.  Block Interactions  . . . . . . . . . . . . . . . . . . .  17
     3.10. Parameter and Result Identification . . . . . . . . . . .  18
     3.11. BSP Block Examples  . . . . . . . . . . . . . . . . . . .  19
       3.11.1.  Example 1: Constructing a Bundle with Security . . .  19
       3.11.2.  Example 2: Adding More Security At A New Node  . . .  20
   4.  Canonical Forms . . . . . . . . . . . . . . . . . . . . . . .  22
   5.  Security Processing . . . . . . . . . . . . . . . . . . . . .  22
     5.1.  Bundles Received from Other Nodes . . . . . . . . . . . .  23
       5.1.1.  Receiving BCBs  . . . . . . . . . . . . . . . . . . .  23
       5.1.2.  Receiving BIBs  . . . . . . . . . . . . . . . . . . .  24
     5.2.  Bundle Fragmentation and Reassembly . . . . . . . . . . .  25
   6.  Key Management  . . . . . . . . . . . . . . . . . . . . . . .  25
   7.  Security Policy Considerations  . . . . . . . . . . . . . . .  25
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  27
     8.1.  Attacker Capabilities and Objectives  . . . . . . . . . .  27
     8.2.  Attacker Behaviors and BPSec Mitigations  . . . . . . . .  28
       8.2.1.  Eavesdropping Attacks . . . . . . . . . . . . . . . .  28
       8.2.2.  Modification Attacks  . . . . . . . . . . . . . . . .  29
       8.2.3.  Topology Attacks  . . . . . . . . . . . . . . . . . .  30
       8.2.4.  Message Injection . . . . . . . . . . . . . . . . . .  30
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