Alternative Challenge Password Attributes for Enrollment over Secure Transport
RFC 7894
Document | Type |
RFC - Proposed Standard
(June 2016; No errata)
Was draft-wallace-est-alt-challenge (individual)
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Authors | Max Pritikin , Carl Wallace | ||
Last updated | 2016-06-08 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | Russ Housley | ||
Shepherd write-up | Show (last changed 2016-02-08) | ||
IESG | IESG state | RFC 7894 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Stephen Farrell | ||
Send notices to | pkix@ietf.org | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) M. Pritikin Request for Comments: 7894 Cisco Systems, Inc. Category: Standards Track C. Wallace ISSN: 2070-1721 Red Hound Software, Inc. June 2016 Alternative Challenge Password Attributes for Enrollment over Secure Transport Abstract This document defines a set of new Certificate Signing Request attributes for use with the Enrollment over Secure Transport (EST) protocol. These attributes provide disambiguation of the existing overloaded uses for the challengePassword attribute defined in "PKCS #9: Selected Object Classes and Attribute Types Version 2.0" (RFC 2985). Uses include the original certificate revocation password, common authentication password uses, and EST-defined linking of transport security identity. 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/rfc7894. Pritikin & Wallace Standards Track [Page 1] RFC 7894 EST Alternative Challenge Password Attributes June 2016 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. Table of Contents 1. Introduction ....................................................3 2. Terminology .....................................................4 3. Alternative Challenge Password Attributes .......................4 3.1. OTP Challenge Attribute ....................................4 3.2. Revocation Challenge Attribute .............................5 3.3. EST Identity Linking Attribute .............................5 4. Indicating Support for the Alternative Challenge Attributes .....6 5. Security Considerations .........................................6 6. IANA Considerations .............................................7 7. References ......................................................7 7.1. Normative References .......................................7 7.2. Informative References .....................................8 Appendix A. ASN.1 Module ..........................................9 Acknowledgements ..................................................10 Authors' Addresses ................................................10 Pritikin & Wallace Standards Track [Page 2] RFC 7894 EST Alternative Challenge Password Attributes June 2016 1. Introduction "PKCS #9: Selected Object Classes and Attribute Types Version 2.0" [RFC2985] defined a challengePassword attribute that has been overloaded by modern protocol usage with the appropriate interpretation being provided by context rather than OID definition. PKCS #9 defines the challengePassword attribute as "a password by which an entity may request certificate revocation". The parsing and embedding of this attribute within Certificate Signing Requests is well supported by common PKI toolsets, but many workflows leverage this supported field as a one-time password for authentication. For example, this is codified in many Simple Certificate Enrollment Protocol (SCEP) implementations as indicated by [SCEP]. Continuing this trend, Enrollment over Secure Transport (EST) [RFC7030] defines an additional semantic for the challengePassword attribute in Section 3.5, in order to provide a linking of the Certificate Signing Request (CSR) to the secure transport. Where the context of the protocol operation fully defined the proper semantic, and when only one use was required at a time, the overloading of this field did not cause difficulties. Implementation experience with EST has shown this to be a limitation though. ThereShow full document text