Remote Attestation Procedures for Network Security Functions (NSFs) through the I2NSF Security Controller
draft-pastor-i2nsf-nsf-remote-attestation-02
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2017-09-13
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Interface to Network Security Functions A. Pastor
Internet-Draft D. Lopez
Intended status: Experimental Telefonica I+D
Expires: March 17, 2018 A. Shaw
Hewlett Packard Labs
September 13, 2017
Remote Attestation Procedures for Network Security Functions (NSFs)
through the I2NSF Security Controller
draft-pastor-i2nsf-nsf-remote-attestation-02
Abstract
This document describes the procedures a client can follow to assess
the trust on an external NSF platform and its client-defined
configuration through the I2NSF Security Controller. The procedure
to assess trustworthiness is based on a remote attestation of the
platform and the NSFs running on it performed through a Trusted
Platform Module (TPM) invoked by the Security Controller.
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 17, 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
Pastor, et al. Expires March 17, 2018 [Page 1]
Internet-Draft Remote Attestation for NSFs September 2017
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Establishing Client Trust . . . . . . . . . . . . . . . . . . 4
3.1. First Step: Client-Agnostic Attestation . . . . . . . . . 4
3.2. Second Step: Client-Specific Attestation . . . . . . . . . 5
3.3. Trusted Computing . . . . . . . . . . . . . . . . . . . . 5
4. NSF Attestation Principles . . . . . . . . . . . . . . . . . . 7
4.1. Requirements for a Trusted NSF Platform . . . . . . . . . 8
4.1.1. Trusted Boot . . . . . . . . . . . . . . . . . . . . . 8
4.1.2. Remote Attestation Service . . . . . . . . . . . . . . 9
4.1.3. Secure Boot . . . . . . . . . . . . . . . . . . . . . 10
5. Remote Attestation Procedures . . . . . . . . . . . . . . . . 11
5.1. Trusted Channel with the Security Controller . . . . . . . 12
5.2. Security Controller Attestation . . . . . . . . . . . . . 13
5.3. Platform Attestation . . . . . . . . . . . . . . . . . . . 14
6. Security Considerations . . . . . . . . . . . . . . . . . . . 14
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.1. Normative References . . . . . . . . . . . . . . . . . . . 15
8.2. Informative References . . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15
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1. Introduction
As described in [RFC8192], the use of externally provided NSF implies
several additional concerns in security. The most relevant threats
associated with a externalized platform are detailed in
[I-D.ietf-i2nsf-framework]. As stated there, mutual authentication
between the user and the NSF environment and, more importantly, the
attestation of the components in this environment by clients, could
address these threats and provide an acceptable level of risk. In
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