The Open Trust Protocol (OTrP)
draft-ietf-teep-opentrustprotocol-03

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TEEP                                                              M. Pei
Internet-Draft                                                  Symantec
Intended status: Informational                                  A. Atyeo
Expires: November 16, 2019                                     Intercede
                                                                 N. Cook
                                                                ARM Ltd.
                                                                  M. Yoo
                                                                 IoTrust
                                                           H. Tschofenig
                                                                ARM Ltd.
                                                            May 15, 2019

                     The Open Trust Protocol (OTrP)
                draft-ietf-teep-opentrustprotocol-03.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

   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 https://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 November 16, 2019.

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

Pei, et al.             Expires November 16, 2019               [Page 1]
Internet-Draft                    OTrP                          May 2019

   (https://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
   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  . . . . . . . . . . . . . . . . . . . . . . . .   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 . . . . . . . . . . . . . . . . . . . .   6
     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