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Trust Anchor Format
RFC 5914

Document type: RFC - Proposed Standard (June 2010; Errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: WG Document
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 5914 (Proposed Standard)
Responsible AD: Tim Polk
Send notices to: pkix-chairs@tools.ietf.org, draft-ietf-pkix-ta-format@tools.ietf.org

Internet Engineering Task Force (IETF)                        R. Housley
Request for Comments: 5914                           Vigil Security, LLC
Category: Standards Track                                     S. Ashmore
ISSN: 2070-1721                                 National Security Agency
                                                              C. Wallace
                                                      Cygnacom Solutions
                                                               June 2010

                          Trust Anchor Format

Abstract

   This document describes a structure for representing trust anchor
   information.  A trust anchor is an authoritative entity represented
   by a public key and associated data.  The public key is used to
   verify digital signatures, and the associated data is used to
   constrain the types of information or actions for which the trust
   anchor is authoritative.  The structures defined in this document are
   intended to satisfy the format-related requirements defined in Trust
   Anchor Management Requirements.

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 5741.

   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/rfc5914.

Housley, et al.              Standards Track                    [Page 1]
RFC 5914                           TAF                         June 2010

Copyright Notice

   Copyright (c) 2010 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.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Trust Anchor Information Syntax  . . . . . . . . . . . . . . .  3
     2.1.  Version  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     2.2.  Public Key . . . . . . . . . . . . . . . . . . . . . . . .  3
     2.3.  Key Identifier . . . . . . . . . . . . . . . . . . . . . .  4
     2.4.  Trust Anchor Title . . . . . . . . . . . . . . . . . . . .  4
     2.5.  Certification Path Controls  . . . . . . . . . . . . . . .  4
     2.6.  Extensions . . . . . . . . . . . . . . . . . . . . . . . .  8
   3.  Trust Anchor List  . . . . . . . . . . . . . . . . . . . . . .  8
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   5.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     5.1.  Normative References . . . . . . . . . . . . . . . . . . .  9
     5.2.  Informative References . . . . . . . . . . . . . . . . . . 10
   Appendix A.  ASN.1 Modules . . . . . . . . . . . . . . . . . . . . 11
     A.1.  ASN.1 Module Using 2002 Syntax . . . . . . . . . . . . . . 11
     A.2.  ASN.1 Module Using 1988 Syntax . . . . . . . . . . . . . . 12
       A.2.1.  ASN.1 Module . . . . . . . . . . . . . . . . . . . . . 12

Housley, et al.              Standards Track                    [Page 2]
RFC 5914                           TAF                         June 2010

1.  Introduction

   Trust anchors are widely used to verify digital signatures and

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