CFRG Elliptic Curve Diffie-Hellman (ECDH) and Signatures in JSON Object Signing and Encryption (JOSE)
RFC 8037
Document | Type | RFC - Proposed Standard (January 2017; Errata) | |
---|---|---|---|
Author | Ilari Liusvaara | ||
Last updated | 2018-04-19 | ||
Replaces | draft-liusvaara-jose-cfrg-curves | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Jim Schaad | ||
Shepherd write-up | Show (last changed 2016-07-20) | ||
IESG | IESG state | RFC 8037 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Kathleen Moriarty | ||
Send notices to | "Jim Schaad" <ietf@augustcellars.com> | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) I. Liusvaara Request for Comments: 8037 Independent Category: Standards Track January 2017 ISSN: 2070-1721 CFRG Elliptic Curve Diffie-Hellman (ECDH) and Signatures in JSON Object Signing and Encryption (JOSE) Abstract This document defines how to use the Diffie-Hellman algorithms "X25519" and "X448" as well as the signature algorithms "Ed25519" and "Ed448" from the IRTF CFRG elliptic curves work in JSON Object Signing and Encryption (JOSE). 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/rfc8037. Copyright Notice Copyright (c) 2017 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. Liusvaara Standards Track [Page 1] RFC 8037 CFRG ECDH and Signatures in JOSE January 2017 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2. Key Type "OKP" . . . . . . . . . . . . . . . . . . . . . . . 3 3. Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1. Signatures . . . . . . . . . . . . . . . . . . . . . . . 4 3.1.1. Signing . . . . . . . . . . . . . . . . . . . . . . . 4 3.1.2. Verification . . . . . . . . . . . . . . . . . . . . 4 3.2. ECDH-ES . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.2.1. Performing the ECDH Operation . . . . . . . . . . . . 5 4. Security Considerations . . . . . . . . . . . . . . . . . . . 5 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 8 6.1. Normative References . . . . . . . . . . . . . . . . . . 8 6.2. Informative References . . . . . . . . . . . . . . . . . 8 Appendix A. Examples . . . . . . . . . . . . . . . . . . . . . . 9 A.1. Ed25519 Private Key . . . . . . . . . . . . . . . . . . . 9 A.2. Ed25519 Public Key . . . . . . . . . . . . . . . . . . . 9 A.3. JWK Thumbprint Canonicalization . . . . . . . . . . . . . 9 A.4. Ed25519 Signing . . . . . . . . . . . . . . . . . . . . . 10 A.5. Ed25519 Validation . . . . . . . . . . . . . . . . . . . 11 A.6. ECDH-ES with X25519 . . . . . . . . . . . . . . . . . . . 11 A.7. ECDH-ES with X448 . . . . . . . . . . . . . . . . . . . . 12 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 14 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 14 1. Introduction The Internet Research Task Force (IRTF) Crypto Forum Research Group (CFRG) selected new Diffie-Hellman algorithms ("X25519" and "X448"; [RFC7748]) and signature algorithms ("Ed25519" and "Ed448"; [RFC8032]) for asymmetric key cryptography. This document defines how to use those algorithms in JOSE in an interoperable manner. This document defines the conventions to use in the context of [RFC7515], [RFC7516], and [RFC7517]. While the CFRG also defined two pairs of isogenous elliptic curves that underlie these algorithms, these curves are not directly exposed, as the algorithms laid on top are sufficient for the purposes of JOSE and are much easier to use. All inputs to and outputs from the Elliptic Curve Diffie-Hellman (ECDH) and signature functions are defined to be octet strings, with the exception of outputs of verification functions, which are booleans. Liusvaara Standards Track [Page 2] RFC 8037 CFRG ECDH and Signatures in JOSE January 2017 1.1. Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",Show full document text