Poll-Based Security Event Token (SET) Delivery Using HTTP
RFC 8936

Document Type RFC - Proposed Standard (November 2020; No errata)
Authors Annabelle Backman  , Michael Jones  , Marius Scurtescu  , Morteza Ansari  , Anthony Nadalin 
Last updated 2020-11-30
Replaces draft-ietf-secevent-delivery
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Stream WG state Submitted to IESG for Publication
Document shepherd Yaron Sheffer
Shepherd write-up Show (last changed 2019-11-19)
IESG IESG state RFC 8936 (Proposed Standard)
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Consensus Boilerplate Yes
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Responsible AD Benjamin Kaduk
Send notices to Yaron Sheffer <yaronf.ietf@gmail.com>
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Internet Engineering Task Force (IETF)                   A. Backman, Ed.
Request for Comments: 8936                                        Amazon
Category: Standards Track                                  M. Jones, Ed.
ISSN: 2070-1721                                                Microsoft
                                                            M. Scurtescu
                                                                Coinbase
                                                               M. Ansari
                                                              A. Nadalin
                                                             Independent
                                                           November 2020

       Poll-Based Security Event Token (SET) Delivery Using HTTP

Abstract

   This specification defines how a series of Security Event Tokens
   (SETs) can be delivered to an intended recipient using HTTP POST over
   TLS initiated as a poll by the recipient.  The specification also
   defines how delivery can be assured, subject to the SET Recipient's
   need for assurance.

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/rfc8936.

Copyright Notice

   Copyright (c) 2020 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 and Overview
     1.1.  Notational Conventions
     1.2.  Definitions
   2.  SET Delivery
     2.1.  Polling Delivery using HTTP
     2.2.  Polling HTTP Request
     2.3.  Polling HTTP Response
     2.4.  Poll Request
       2.4.1.  Poll-Only Request
       2.4.2.  Acknowledge-Only Request
       2.4.3.  Poll with Acknowledgement
       2.4.4.  Poll with Acknowledgement and Errors
     2.5.  Poll Response
       2.5.1.  Poll Error Response
     2.6.  Error Response Handling
   3.  Authentication and Authorization
   4.  Security Considerations
     4.1.  Authentication Using Signed SETs
     4.2.  HTTP Considerations
     4.3.  Confidentiality of SETs
     4.4.  Access Token Considerations
       4.4.1.  Bearer Token Considerations
   5.  Privacy Considerations
   6.  IANA Considerations
   7.  References
     7.1.  Normative References
     7.2.  Informative References
   Appendix A.  Unencrypted Transport Considerations
   Acknowledgments
   Authors' Addresses

1.  Introduction and Overview

   This specification defines how a stream of Security Event Tokens
   (SETs) [RFC8417] can be transmitted to an intended SET Recipient
   using HTTP [RFC7231] over TLS.  The specification defines a method to
   poll for SETs using HTTP POST.  This is an alternative SET delivery
   method to the one defined in [RFC8935].

   Poll-based SET delivery is intended for scenarios where all of the
   following apply:

   *  The recipient of the SET is capable of making outbound HTTP
      requests.

   *  The transmitter is capable of hosting a TLS-enabled HTTP endpoint
      that is accessible to the recipient.

   *  The transmitter and recipient are willing to exchange data with
      one another.

   In some scenarios, either push-based or poll-based delivery could be
   used, and in others, only one of them would be applicable.

   A mechanism for exchanging configuration metadata such as endpoint
   URLs, cryptographic keys, and possible implementation constraints
   such as buffer size limitations between the transmitter and recipient
   is out of scope for this specification.  How SETs are defined and the
   process by which security events are identified for SET Recipients
   are specified in [RFC8417].

1.1.  Notational Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.
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