draft-ietf-curdle-ssh-modp-dh-sha2-04.txt   draft-ietf-curdle-ssh-modp-dh-sha2-05.txt 
Internet Engineering Task Force M. Baushke Internet Engineering Task Force M. Baushke
Internet-Draft Juniper Networks, Inc. Internet-Draft Juniper Networks, Inc.
Updates: 4250, 4253 (if approved) April 14, 2017 Updates: 4250, 4253 (if approved) May 8, 2017
Intended status: Standards Track Intended status: Standards Track
Expires: October 16, 2017 Expires: November 9, 2017
More Modular Exponential (MODP) Diffie-Hellman (DH) Key Exchange (KEX) More Modular Exponential (MODP) Diffie-Hellman (DH) Key Exchange (KEX)
Groups for Secure Shell (SSH) Groups for Secure Shell (SSH)
draft-ietf-curdle-ssh-modp-dh-sha2-04 draft-ietf-curdle-ssh-modp-dh-sha2-05
Abstract Abstract
This document defines added Modular Exponential (MODP) Groups for the This document defines added Modular Exponential (MODP) Groups for the
Secure Shell (SSH) protocol using SHA-2 hashes. This document Secure Shell (SSH) protocol using SHA-2 hashes. This document
updates RFC 4250. This document updates RFC 4253. updates RFC 4250. This document updates RFC 4253.
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on October 16, 2017. This Internet-Draft will expire on November 9, 2017.
Copyright Notice Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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The SHA-2 family of secure hash algorithms are defined in [RFC6234]. The SHA-2 family of secure hash algorithms are defined in [RFC6234].
The method of key exchange used for the name "diffie-hellman- The method of key exchange used for the name "diffie-hellman-
group14-sha256" is the same as that for "diffie-hellman-group14-sha1" group14-sha256" is the same as that for "diffie-hellman-group14-sha1"
except that the SHA2-256 hash algorithm is used. It is recommended except that the SHA2-256 hash algorithm is used. It is recommended
that diffie-hellman-group14-sha256 SHOULD be supported to smooth the that diffie-hellman-group14-sha256 SHOULD be supported to smooth the
transition to newer group sizes. transition to newer group sizes.
The group15 through group18 names are the same as those specified in The group15 through group18 names are the same as those specified in
[RFC3526] 3071-bit MODP Group 15, 4096-bit MODP Group 16, 6144-bit [RFC3526] 3072-bit MODP Group 15, 4096-bit MODP Group 16, 6144-bit
MODP Group 17, and 8192-bit MODP Group 18. MODP Group 17, and 8192-bit MODP Group 18.
The SHA2-512 algorithm is to be used when "sha512" is specified as a The SHA2-512 algorithm is to be used when "sha512" is specified as a
part of the key exchange method name. part of the key exchange method name.
4. IANA Considerations 4. IANA Considerations
This document augments the Key Exchange Method Names in [RFC4253] and This document augments the Key Exchange Method Names in [RFC4253] and
[RFC4250]. [RFC4250].
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