The Open Trust Protocol (OTrP)
draft-ietf-teep-opentrustprotocol-02
TEEP M. Pei
Internet-Draft Symantec
Intended status: Informational A. Atyeo
Expires: April 26, 2019 Intercede
N. Cook
ARM Ltd.
M. Yoo
IoTrust
H. Tschofenig
ARM Ltd.
October 23, 2018
The Open Trust Protocol (OTrP)
draft-ietf-teep-opentrustprotocol-02.txt
Abstract
This document specifies the Open Trust Protocol (OTrP), a protocol
that follows the Trust Execution Environment Provisioning (TEEP)
architecture and provides a message protocol that provisions and
manages Trusted Applications into a device with a Trusted Execution
Environment (TEE).
Status of This Memo
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provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft will expire on April 26, 2019.
Copyright Notice
Copyright (c) 2018 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
Pei, et al. Expires April 26, 2019 [Page 1]
Internet-Draft OTrP October 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 6
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Definitions . . . . . . . . . . . . . . . . . . . . . . . 6
3.2. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 6
4. OTrP Entities and Trust Model . . . . . . . . . . . . . . . . 6
4.1. System Components . . . . . . . . . . . . . . . . . . . . 7
4.2. Trust Anchors in TEE . . . . . . . . . . . . . . . . . . 7
4.3. Trust Anchors in TAM . . . . . . . . . . . . . . . . . . 7
4.4. Keys and Certificate Types . . . . . . . . . . . . . . . 7
5. Protocol Scope and Entity Relations . . . . . . . . . . . . . 10
5.1. A Sample Device Setup Flow . . . . . . . . . . . . . . . 12
5.2. Derived Keys in The Protocol . . . . . . . . . . . . . . 12
5.3. Security Domain Hierarchy and Ownership . . . . . . . . . 13
5.4. SD Owner Identification and TAM Certificate Requirements 13
5.5. Service Provider Container . . . . . . . . . . . . . . . 14
6. OTrP Broker . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1. Role of OTrP Broker . . . . . . . . . . . . . . . . . . . 15
6.2. OTrP Broker and Global Platform TEE Client API . . . . . 16
6.3. OTrP Broker Implementation Consideration . . . . . . . . 16
6.3.1. OTrP Broker Distribution . . . . . . . . . . . . . . 16
6.3.2. Number of OTrP Broker . . . . . . . . . . . . . . . . 16
6.4. OTrP Broker Interfaces for Client Applications . . . . . 17
6.4.1. ProcessOTrPMessage call . . . . . . . . . . . . . . . 17
6.4.2. GetTAInformation call . . . . . . . . . . . . . . . . 17
6.5. Sample End-to-End Client Application Flow . . . . . . . . 20
6.5.1. Case 1: A New Client Application Uses a TA . . . . . 20
6.5.2. Case 2: A Previously Installed Client Application
Calls a TA . . . . . . . . . . . . . . . . . . . . . 21
7. OTrP Messages . . . . . . . . . . . . . . . . . . . . . . . . 22
7.1. Message Format . . . . . . . . . . . . . . . . . . . . . 22
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