EST (Enrollment over Secure Transport) Extensions
RFC 8295

Document Type RFC - Proposed Standard (January 2018; No errata)
Last updated 2018-01-31
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Internet Engineering Task Force (IETF)                         S. Turner
Request for Comments: 8295                                         sn3rd
Category: Standards Track                                   January 2018
ISSN: 2070-1721

           EST (Enrollment over Secure Transport) Extensions

Abstract

   The EST (Enrollment over Secure Transport) protocol defines the Well-
   Known URI (Uniform Resource Identifier) -- /.well-known/est -- along
   with a number of other path components that clients use for PKI
   (Public Key Infrastructure) services, namely certificate enrollment
   (e.g., /simpleenroll).  This document defines a number of other PKI
   services as additional path components -- specifically, firmware and
   trust anchors as well as symmetric, asymmetric, and encrypted keys.
   This document also specifies the PAL (Package Availability List),
   which is an XML (Extensible Markup Language) file or JSON (JavaScript
   Object Notation) object that clients use to retrieve packages
   available and authorized for them.  This document extends the EST
   server path components to provide these additional services.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8295.

Turner                       Standards Track                    [Page 1]
RFC 8295                     EST Extensions                 January 2018

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
   (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 ....................................................4
      1.1. Definitions ................................................6
      1.2. Authentication and Authorization ...........................7
      1.3. TLS Cipher Suites ..........................................7
      1.4. URI Configuration ..........................................7
      1.5. Message Types ..............................................8
      1.6. Key Words .................................................10
   2. Locate Available Packages ......................................10
      2.1. PAL Format ................................................12
           2.1.1. PAL Package Types ..................................14
           2.1.2. PAL XML Schema .....................................19
           2.1.3. PAL JSON Object ....................................23
      2.2. Request PAL ...............................................23
      2.3. Provide PAL ...............................................24
   3. Distribute EE Certificates .....................................25
      3.1. EE Certificate Request ....................................25
      3.2. EE Certificate Response ...................................26
   4. Distribute CRLs and ARLs .......................................26
      4.1. CRL Request ...............................................26
      4.2. CRL Response ..............................................26
   5. Symmetric Keys, Receipts, and Errors ...........................27
      5.1. Symmetric Keys ............................................27
           5.1.1. Distribute Symmetric Keys ..........................28
           5.1.2. Symmetric Key Response .............................28
      5.2. Symmetric Key Receipts and Errors .........................29
           5.2.1. Provide Symmetric Key Receipt or Error .............30
           5.2.2. Symmetric Key Receipt or Error Response ............31

Turner                       Standards Track                    [Page 2]
RFC 8295                     EST Extensions                 January 2018

   6. Firmware, Receipts, and Errors .................................31
      6.1. Firmware ..................................................31
           6.1.1. Distribute Firmware ................................32
           6.1.2. Firmware Response ..................................32
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