Cryptographic Algorithm Implementation Requirements and Usage Guidance for Encapsulating Security Payload (ESP) and Authentication Header (AH)
RFC 7321
| Document | Type |
RFC - Proposed Standard
(August 2014; No errata)
Obsoletes RFC 4835
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Yaron Sheffer | ||
| Shepherd write-up | Show (last changed 2014-04-12) | ||
| IESG | IESG state | RFC 7321 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Kathleen Moriarty | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | No IC | ||
Internet Engineering Task Force (IETF) D. McGrew Request for Comments: 7321 Cisco Systems Obsoletes: 4835 P. Hoffman Category: Standards Track VPN Consortium ISSN: 2070-1721 August 2014 Cryptographic Algorithm Implementation Requirements and Usage Guidance for Encapsulating Security Payload (ESP) and Authentication Header (AH) Abstract This document updates the Cryptographic Algorithm Implementation Requirements for the Encapsulating Security Payload (ESP) and Authentication Header (AH). It also adds usage guidance to help in the selection of these algorithms. ESP and AH protocols make use of various cryptographic algorithms to provide confidentiality and/or data origin authentication to protected data communications in the IP Security (IPsec) architecture. To ensure interoperability between disparate implementations, the IPsec standard specifies a set of mandatory-to- implement algorithms. This document specifies the current set of mandatory-to-implement algorithms for ESP and AH, specifies algorithms that should be implemented because they may be promoted to mandatory at some future time, and also recommends against the implementation of some obsolete algorithms. Usage guidance is also provided to help the user of ESP and AH best achieve their security goals through appropriate choices of cryptographic algorithms. This document obsoletes RFC 4835. 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/rfc7321. McGrew & Hoffman Standards Track [Page 1] RFC 7321 Requirements for ESP and AH August 2014 Copyright Notice Copyright (c) 2014 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. Requirements Language . . . . . . . . . . . . . . . . . . 3 2. Implementation Requirements . . . . . . . . . . . . . . . . . 4 2.1. ESP Authenticated Encryption (Combined Mode Algorithms) . 4 2.2. ESP Encryption Algorithms . . . . . . . . . . . . . . . . 4 2.3. ESP Authentication Algorithms . . . . . . . . . . . . . . 5 2.4. AH Authentication Algorithms . . . . . . . . . . . . . . 5 2.5. Summary of Changes from RFC 4835 . . . . . . . . . . . . 5 3. Usage Guidance . . . . . . . . . . . . . . . . . . . . . . . 5 4. Rationale . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.1. Authenticated Encryption . . . . . . . . . . . . . . . . 7 4.2. Encryption Transforms . . . . . . . . . . . . . . . . . . 7 4.3. Authentication Transforms . . . . . . . . . . . . . . . . 7 5. Algorithm Diversity . . . . . . . . . . . . . . . . . . . . . 8 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 9Show full document text