SHA-2 Data Integrity Verification for the Secure Shell (SSH) Transport Layer Protocol (RFC6668)

Internet Engineering Task Force (IETF)                          D. Bider Request for Comments: 6668                               Bitvise Limited Updates: 4253                                                 M. Baushke Category: Standards Track                         Juniper Networks, Inc. ISSN: 2070-1721                                                July 2012

                  SHA-2 Data Integrity Verification for             the Secure Shell (SSH) Transport Layer Protocol

Abstract

   This memo defines algorithm names and parameters for use in some of    the SHA-2 family of secure hash algorithms for data integrity    verification in the Secure Shell (SSH) protocol.  It also updates RFC    4253 by specifying a new RECOMMENDED data integrity algorithm.

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/rfc6668.

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    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.

 Bider & Baushke              Standards Track                    [Page 1]
 RFC 6668              Sha2-Transport Layer Protocol            July 2012

 1.  Overview and Rationale

   The Secure Shell (SSH) [RFC4251] is a very common protocol for secure    remote login on the Internet.  Currently, SSH defines data integrity    verification using SHA-1 and MD5 algorithms [RFC4253].  Due to recent    security concerns with these two algorithms ([RFC6194] and [RFC6151],    respectively), implementors and users request support for data    integrity verification using some of the SHA-2 family of secure hash ...