Discovering And Accessing Software Bills of Materials
draft-lear-opsawg-sbom-access-00

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Authors Eliot Lear  , Scott Rose 
Last updated 2020-10-13
Replaces draft-lear-opsawg-mud-sbom
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Network Working Group                                            E. Lear
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                                 S. Rose
Expires: April 16, 2021                                             NIST
                                                        October 13, 2020

         Discovering And Accessing Software Bills of Materials
                    draft-lear-opsawg-sbom-access-00

Abstract

   Software bills of materials (SBOMs) are formal descriptions of what
   pieces of software are included in a product.  This memo specifies a
   different means for SBOMs to be retrieved.

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 16, 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
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  How This Information Is Used  . . . . . . . . . . . . . .   3
     1.2.  SBOM formats  . . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Discussion points . . . . . . . . . . . . . . . . . . . .   4
   2.  The mud-sbom extension model extension  . . . . . . . . . . .   4
   3.  The mud-sbom augmentation to the MUD YANG model . . . . . . .   5
   4.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Without ACLS  . . . . . . . . . . . . . . . . . . . . . .   8
     4.2.  Located on the Device . . . . . . . . . . . . . . . . . .   8
     4.3.  SBOM Obtained from Contact Information  . . . . . . . . .   9
     4.4.  With ACLS . . . . . . . . . . . . . . . . . . . . . . . .  10
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  MUD Extension . . . . . . . . . . . . . . . . . . . . . .  13
     6.2.  Well-Known Prefix . . . . . . . . . . . . . . . . . . . .  13
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Appendix A.  Changes from Earlier Versions  . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   Software bills of material (SBOMs) are descriptions of what software,
   including versioning and dependencies, a device contains.  There are
   different SBOM formats such as Software Package Data Exchange [SPDX],
   Software Identity Tags [SWID], or CycloneDX[CycloneDX12].

   This memo specifies means by which SBOMs can be advertised and
   retrieved.

   The mechanisms specified in this document are meant to satisfy
   several use cases:

   o  An application-layer management system retrieving an SBOM in order
      to evaluate the posture of an application server of some form.
      These application servers may themselves be containers or
      hypervisors.  Discovery of the topology of a server is beyond the
      scope of this memo.

   o  A network-layer management system retrieving an SBOM from an IoT
      device as part of its ongoing lifecycle.  Such devices may or may
      not have interfaces available to query SBOM information.

   To satisfy these two key use cases, SBOMs may be found in one of
   three ways:

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   o  on devices themselves

   o  on a web site (e.g., via URI)
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