Key Exchange (KEX) Method Updates and Recommendations for Secure Shell (SSH)
draft-ietf-curdle-ssh-kex-sha2-08
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Internet Engineering Task Force M. Baushke
Internet-Draft Juniper Networks, Inc.
Updates: 4250 (if approved) April 15, 2017
Intended status: Standards Track
Expires: October 17, 2017
Key Exchange (KEX) Method Updates and Recommendations for Secure Shell
(SSH)
draft-ietf-curdle-ssh-kex-sha2-08
Abstract
This document is intended to update the recommended set of key
exchange methods for use in the Secure Shell (SSH) protocol to meet
evolving needs for stronger security. This document updates RFC
4250.
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 17, 2017.
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
Baushke Expires October 17, 2017 [Page 1]
Internet-Draft KEX Method Updates/Recommendations for SSH April 2017
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Overview and Rationale . . . . . . . . . . . . . . . . . . . 3
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Key Exchange Methods . . . . . . . . . . . . . . . . . . . . 3
3.1. curve25519-sha256 . . . . . . . . . . . . . . . . . . . . 4
3.2. diffie-hellman-group-exchange-sha1 . . . . . . . . . . . 4
3.3. diffie-hellman-group-exchange-sha256 . . . . . . . . . . 4
3.4. diffie-hellman-group1-sha1 . . . . . . . . . . . . . . . 4
3.5. diffie-hellman-group14-sha1 . . . . . . . . . . . . . . . 4
3.6. diffie-hellman-group14-sha256 . . . . . . . . . . . . . . 5
3.7. diffie-hellman-group16-sha512 . . . . . . . . . . . . . . 5
3.8. ecdh-sha2-nistp256 . . . . . . . . . . . . . . . . . . . 5
3.9. ecdh-sha2-nistp384 . . . . . . . . . . . . . . . . . . . 5
3.10. gss-gex-sha1-* . . . . . . . . . . . . . . . . . . . . . 5
3.11. gss-group1-sha1-* . . . . . . . . . . . . . . . . . . . . 6
3.12. gss-group14-sha1-* . . . . . . . . . . . . . . . . . . . 6
3.13. gss-group14-sha256-* . . . . . . . . . . . . . . . . . . 6
3.14. gss-group16-sha512-* . . . . . . . . . . . . . . . . . . 6
3.15. rsa1024-sha1 . . . . . . . . . . . . . . . . . . . . . . 6
4. Summary Guidance for Key Exchange Method Names . . . . . . . 6
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
6. Security Considerations . . . . . . . . . . . . . . . . . . . 8
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.1. Normative References . . . . . . . . . . . . . . . . . . 9
8.2. Informative References . . . . . . . . . . . . . . . . . 10
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 11
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