[Docs] [txt|pdf] [Tracker] [WG] [Email] [Nits]

Versions: 00 01 02 03 04 05 06 RFC 6668

Network Working Group                                           d. bider
Internet-Draft                                           Bitvise Limited
Expires: October 10, 2011                                  April 8, 2011

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


   This memo defines algorithm names and parameters for use of SHA-2 for
   data integrity verification in the Secure Shell (SSH) protocol.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 10, 2011.

Copyright Notice

   Copyright (c) 2011 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                   Expires October 10, 2011                [Page 1]

Internet-Draft              SHA-2 MAC for SSH                 April 2011

1.  Overview and Rationale

   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, implementors and users request
   support for data integrity verification using SHA-2.

bider                   Expires October 10, 2011                [Page 2]

Internet-Draft              SHA-2 MAC for SSH                 April 2011

2.  Data Integrity Algorithms

   This memo adopts the style and conventions of [RFC4253] in defining
   new data integrity algorithms.

   The following new data integrity algorithms are defined:

   hmac-sha2-256     OPTIONAL  HMAC-SHA2-256
                               (digest length = key length = 32)
   hmac-sha2-256-96  OPTIONAL  first 96 bits of HMAC-SHA2-256
                               (digest length = 12,
                                key length = 32)
   hmac-sha2-512     OPTIONAL  HMAC-SHA2-512
                               (digest length = key length = 64)
   hmac-sha2-512-96  OPTIONAL  first 96 bits of HMAC-SHA2-512
                               (digest length = 12,
                                key length = 64)

                                 Figure 1

bider                   Expires October 10, 2011                [Page 3]

Internet-Draft              SHA-2 MAC for SSH                 April 2011

3.  References

              National Institute of Standards and Technology (NIST),
              "Secure Hash Standard (SHS)", FIPS PUB 180-2, August 2002.

   [RFC4251]  Ylonen, T. and C. Lonvick, "The Secure Shell (SSH)
              Protocol Architecture", RFC 4251, January 2006.

   [RFC4253]  Ylonen, T. and C. Lonvick, "The Secure Shell (SSH)
              Transport Layer Protocol", RFC 4253, January 2006.

bider                   Expires October 10, 2011                [Page 4]

Internet-Draft              SHA-2 MAC for SSH                 April 2011

Author's Address

   denis bider
   Bitvise Limited
   Suites 41/42, Victoria House
   26 Main Street

   Phone: +1 869 762 1410
   Email: hmac-sha2-256@bitvise.com
   URI:   http://www.bitvise.com/

bider                   Expires October 10, 2011                [Page 5]

Html markup produced by rfcmarkup 1.114, available from https://tools.ietf.org/tools/rfcmarkup/