Quick and Dirty Security for GRASP
draft-carpenter-anima-quads-grasp-01
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Brian Carpenter
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Network Working Group B. Carpenter
Internet-Draft Univ. of Auckland
Intended status: Informational October 24, 2019
Expires: April 26, 2020
Quick and Dirty Security for GRASP
draft-carpenter-anima-quads-grasp-01
Abstract
A secure substrate is required by the Generic Autonomic Signaling
Protocol (GRASP) used by Autonomic Service Agents. This document
describes QUADS, a QUick And Dirty Security method using symmetric
cryptography and preconfigured keys or passwords. It also describes
a simplistic QUADS Key Infrastructure based on asymmetric
cryptography used over insecure instances of GRASP.
Status of This Memo
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This Internet-Draft will expire on April 26, 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
Provisions Relating to IETF Documents
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publication of this document. Please review these documents
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include Simplified BSD License text as described in Section 4.e of
Carpenter Expires April 26, 2020 [Page 1]
Internet-Draft QUADS for GRASP October 2019
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. QUick And Dirty Security Method . . . . . . . . . . . . . . . 2
3. QUick And Dirty Security Key Infrastructure . . . . . . . . . 3
4. Implementation Status [RFC Editor: please remove] . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . 6
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1. Normative References . . . . . . . . . . . . . . . . . . 7
8.2. Informative References . . . . . . . . . . . . . . . . . 7
Appendix A. Change log [RFC Editor: Please remove] . . . . . . . 8
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
As defined in [I-D.ietf-anima-reference-model], the Autonomic Service
Agent (ASA) is the atomic entity of an autonomic function, and it is
instantiated on autonomic nodes. When ASAs communicate with each
other, they should use the Generic Autonomic Signaling Protocol
(GRASP) [I-D.ietf-anima-grasp]. It is essential that such
communication is strongly secured to avoid malicious interference
with the Autonomic Network Infrastructure (ANI).
For this reason, GRASP must run over a secure substrate that is
isolated from regular data plane traffic. This substrate is known as
the Autonomic Control Plane (ACP). A method for constructing an ACP
at the network layer is described in
[I-D.ietf-anima-autonomic-control-plane]. Scenarios for link layer
ACPs are discussed in [I-D.carpenter-anima-l2acp-scenarios]. The
present document describes a simple method of emulating an ACP
immediately above the transport layer, known as QUADS (QUick And
Dirty Security) for GRASP.
It also describes a simplistic key infrastructure known as QUADSKI,
using asymmetric cryptography embedded in GRASP objectives used over
insecure instances of GRASP.
2. QUick And Dirty Security Method
Every GRASP message, whether unicast or multicast, is encrypted
immediately before transmission, and decrypted immediately after
reception, using the same symmetric encryption algorithm and domain-
wide shared keys. This applies to all unicast and multicast messages
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Internet-Draft QUADS for GRASP October 2019
sent over either UDP or TCP. Typically encryption will take place
immediately after a message is encoded as CBOR [RFC7049], and
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