Kerberos Principal Name Canonicalization and Cross-Realm Referrals
RFC 6806
Document | Type |
RFC - Proposed Standard
(November 2012; No errata)
Updates RFC 4120
|
|
---|---|---|---|
Authors | Sam Hartman , Kenneth Raeburn , Larry Zhu | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Jeffrey Hutzelman | ||
Shepherd write-up | Show (last changed 2012-03-09) | ||
IESG | IESG state | RFC 6806 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Stephen Farrell | ||
IESG note | The Document Shepherd for this document is Jeffrey Hutzelman (jhutz@cmu.edu). | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) S. Hartman, Ed. Request for Comments: 6806 Painless Security Updates: 4120 K. Raeburn Category: Standards Track MIT ISSN: 2070-1721 L. Zhu Microsoft Corporation November 2012 Kerberos Principal Name Canonicalization and Cross-Realm Referrals Abstract This memo documents a method for a Kerberos Key Distribution Center (KDC) to respond to client requests for Kerberos tickets when the client does not have detailed configuration information on the realms of users or services. The KDC will handle requests for principals in other realms by returning either a referral error or a cross-realm Ticket-Granting Ticket (TGT) to another realm on the referral path. The clients will use this referral information to reach the realm of the target principal and then receive the ticket. This memo also provides a mechanism for verifying that a request has not been tampered with in transit. This memo updates RFC 4120. 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/rfc6806. Copyright Notice Copyright (c) 2012 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 Hartman, et al. Standards Track [Page 1] RFC 6806 KDC Referrals November 2012 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 2. Conventions Used in This Document . . . . . . . . . . . . . . 4 3. Requesting a Referral . . . . . . . . . . . . . . . . . . . . 4 4. Realm Organization Model . . . . . . . . . . . . . . . . . . . 5 4.1. Trust Assumptions . . . . . . . . . . . . . . . . . . . . 5 5. Enterprise Principal Name Type . . . . . . . . . . . . . . . . 6 6. Name Canonicalization . . . . . . . . . . . . . . . . . . . . 7 7. Client Referrals . . . . . . . . . . . . . . . . . . . . . . . 9 8. Server Referrals . . . . . . . . . . . . . . . . . . . . . . . 10 9. Cross-Realm Routing . . . . . . . . . . . . . . . . . . . . . 11 10. Caching Information . . . . . . . . . . . . . . . . . . . . . 11 11. Negotiation of FAST and Detecting Modified Requests . . . . . 12 12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13 13. Security Considerations . . . . . . . . . . . . . . . . . . . 13 13.1. Shared-Password Case . . . . . . . . . . . . . . . . . . . 16 13.2. Pre-Authentication Data . . . . . . . . . . . . . . . . . 16 14. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 17 15. References . . . . . . . . . . . . . . . . . . . . . . . . . . 17 15.1. Normative References . . . . . . . . . . . . . . . . . . . 17 15.2. Informative References . . . . . . . . . . . . . . . . . . 17 Appendix A. Compatibility with Earlier Implementations of Name Canonicalization . . . . . . . . . . . . . . . . 18Show full document text