Use of the SHA-256 Algorithm with RSA, Digital Signature Algorithm (DSA), and Elliptic Curve DSA (ECDSA) in SSHFP Resource Records
RFC 6594
Document | Type |
RFC - Proposed Standard
(April 2012; Errata)
Was draft-os-ietf-sshfp-ecdsa-sha2 (individual in sec area)
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Author | Ondřej Surý | ||
Last updated | 2020-05-16 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6594 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Stephen Farrell | ||
Send notices to | elwynd@googlemail.com |
Internet Engineering Task Force (IETF) O. Sury Request for Comments: 6594 CZ.NIC Category: Standards Track April 2012 ISSN: 2070-1721 Use of the SHA-256 Algorithm with RSA, Digital Signature Algorithm (DSA), and Elliptic Curve DSA (ECDSA) in SSHFP Resource Records Abstract This document updates the IANA registries in RFC 4255, which defines SSHFP, a DNS Resource Record (RR) that contains a standard Secure Shell (SSH) key fingerprint used to verify SSH host keys using DNS Security Extensions (DNSSEC). This document defines additional options supporting SSH public keys applying the Elliptic Curve Digital Signature Algorithm (ECDSA) and the implementation of fingerprints computed using the SHA-256 message digest algorithm in SSHFP Resource Records. 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 fInternet 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/rfc6594. 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 to this document. Code Components extracted from this document must Sury Standards Track [Page 1] RFC 6594 ECDSA and SHA-256 Algorithms for SSHFP April 2012 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. Requirements Language ...........................................4 3. SSHFP Resource Records ..........................................4 3.1. SSHFP Fingerprint Type Specification .......................4 3.1.1. SHA-256 SSHFP Fingerprint Type Specification ........4 3.2. SSHFP Algorithm Number Specification .......................4 3.2.1. ECDSA SSHFP Algorithm Number Specification ..........4 4. Implementation Considerations ...................................4 4.1. Support for SHA-256 Fingerprints ...........................4 4.2. Support for ECDSA ..........................................4 5. Examples ........................................................5 5.1. RSA Public Key .............................................5 5.1.1. RSA Public Key with SHA1 Fingerprint ................5 5.1.2. RSA Public Key with SHA-256 Fingerprint .............5 5.2. DSA Public Key .............................................6 5.2.1. DSA Public Key with SHA1 Fingerprint ................6 5.2.2. DSA Public Key with SHA-256 Fingerprint .............6 5.3. ECDSA Public Key ...........................................6 5.3.1. ECDSA Public Key with SHA1 Fingerprint ..............7 5.3.2. ECDSA Public Key with SHA-256 Fingerprint ...........7 6. IANA Considerations .............................................7 6.1. SSHFP RR Types for Public Key Algorithms ...................7 6.2. SSHFP RR Types for Fingerprint Types .......................7 7. Security Considerations .........................................8 8. References ......................................................8 8.1. Normative References .......................................8 8.2. Informative References .....................................9 Sury Standards Track [Page 2] RFC 6594 ECDSA and SHA-256 Algorithms for SSHFP April 2012 1. Introduction The Domain Name System (DNS) is the global, hierarchical distributed database for Internet naming. The Secure Shell (SSH) is a protocol for secure remote login and other secure network services over an insecure network. RFC 4253 [RFC4253] defines Public Key Algorithms for the Secure Shell server public keys. The DNS has been extended to store fingerprints in a DNS Resource Record named SSHFP [RFC4255], which provides out-of-band verificationShow full document text