Remote Procedure Call (RPC) Security Version 3
RFC 7861

Document Type RFC - Proposed Standard (November 2016; No errata)
Updates RFC 5403
Last updated 2016-11-10
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IESG IESG state RFC 7861 (Proposed Standard)
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Internet Engineering Task Force (IETF)                        W. Adamson
Request for Comments: 7861                                        NetApp
Updates: 5403                                                N. Williams
Category: Standards Track                                   Cryptonector
ISSN: 2070-1721                                            November 2016

             Remote Procedure Call (RPC) Security Version 3

Abstract

   This document specifies version 3 of the Remote Procedure Call (RPC)
   security protocol (RPCSEC_GSS).  This protocol provides support for
   multi-principal authentication of client hosts and user principals to
   a server (constructed by generic composition), security label
   assertions for multi-level security and type enforcement, structured
   privilege assertions, and channel bindings.  This document updates
   RFC 5403.

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
   http://www.rfc-editor.org/info/rfc7861.

Copyright Notice

   Copyright (c) 2016 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
   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.

Adamson & Williams           Standards Track                    [Page 1]
RFC 7861                   NFSv4 RPC Security              November 2016

Table of Contents

   1. Introduction and Motivation .....................................2
      1.1. Requirements Language ......................................3
      1.2. Added Functionality ........................................4
      1.3. XDR Code Extraction ........................................5
   2. The RPCSEC_GSSv3 Protocol .......................................6
      2.1. Compatibility with RPCSEC_GSSv2 ............................6
      2.2. Version Negotiation ........................................6
      2.3. New Reply Verifier .........................................7
      2.4. XDR Code Preliminaries .....................................8
      2.5. RPCSEC_GSS_BIND_CHANNEL Operation .........................10
      2.6. New auth_stat Values ......................................10
      2.7. New Control Procedures ....................................10
           2.7.1. New Control Procedure - RPCSEC_GSS_CREATE ..........12
           2.7.2. New Control Procedure - RPCSEC_GSS_LIST ............20
      2.8. Extensibility .............................................21
   3. Operational Recommendation for Deployment ......................21
   4. Security Considerations ........................................21
   5. IANA Considerations ............................................22
      5.1. New RPC Authentication Status Numbers .....................22
      5.2. Structured Privilege Name Definitions .....................23
           5.2.1. Initial Registry ...................................24
           5.2.2. Updating Registrations .............................24
   6. References .....................................................25
      6.1. Normative References ......................................25
      6.2. Informative References ....................................26
   Acknowledgments ...................................................26
   Authors' Addresses ................................................26

1.  Introduction and Motivation

   The original Remote Procedure Call (RPC) security protocol
   (RPCSEC_GSS) [RFC2203] provided for authentication of RPC clients and
   servers to each other using the Generic Security Service Application
   Programming Interface (GSS-API) [RFC2743].  The second version of
   RPCSEC_GSS [RFC5403] added support for channel bindings [RFC5056].

   Existing GSS-API mechanisms are insufficient for communicating
   certain authorization and authentication information to a server.
   The GSS-API and its mechanisms certainly could be extended to address
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