Key Exchange (KEX) Method Updates and Recommendations for Secure Shell (SSH)
draft-ietf-curdle-ssh-kex-sha2-10
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Active Internet-Draft (curdle WG)
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Last updated |
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2019-03-27
(latest revision 2018-01-02)
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Replaces |
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draft-baushke-ssh-dh-group-sha2
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IETF
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Intended RFC status |
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Proposed Standard
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plain text
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Daniel Migault
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Shepherd write-up |
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Show
(last changed 2018-01-05)
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IESG state |
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AD Evaluation::Revised I-D Needed
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Consensus Boilerplate |
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Yes
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Responsible AD |
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Benjamin Kaduk
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Send notices to |
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Daniel Migault <daniel.migaultf@ericsson.com>
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Internet Engineering Task Force M. Baushke
Internet-Draft Juniper Networks, Inc.
Updates: 4250 (if approved) January 2, 2018
Intended status: Standards Track
Expires: July 6, 2018
Key Exchange (KEX) Method Updates and Recommendations for Secure Shell
(SSH)
draft-ietf-curdle-ssh-kex-sha2-10
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 https://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 July 6, 2018.
Copyright Notice
Copyright (c) 2018 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
(https://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 July 6, 2018 [Page 1]
Internet-Draft KEX Method Updates/Recommendations for SSH January 2018
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Overview and Rationale . . . . . . . . . . . . . . . . . . . 3
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Key Exchange Methods . . . . . . . . . . . . . . . . . . . . 3
3.1. curve25519-sha256 . . . . . . . . . . . . . . . . . . . . 4
3.2. curve448-sha512 . . . . . . . . . . . . . . . . . . . . . 4
3.3. diffie-hellman-group-exchange-sha1 . . . . . . . . . . . 4
3.4. diffie-hellman-group-exchange-sha256 . . . . . . . . . . 4
3.5. diffie-hellman-group1-sha1 . . . . . . . . . . . . . . . 4
3.6. diffie-hellman-group14-sha1 . . . . . . . . . . . . . . . 5
3.7. diffie-hellman-group14-sha256 . . . . . . . . . . . . . . 5
3.8. diffie-hellman-group15-sha512 . . . . . . . . . . . . . . 5
3.9. diffie-hellman-group16-sha512 . . . . . . . . . . . . . . 5
3.10. diffie-hellman-group17-sha512 . . . . . . . . . . . . . . 5
3.11. diffie-hellman-group18-sha512 . . . . . . . . . . . . . . 6
3.12. ecdh-sha2-nistp256 . . . . . . . . . . . . . . . . . . . 6
3.13. ecdh-sha2-nistp384 . . . . . . . . . . . . . . . . . . . 6
3.14. ecdh-sha2-nistp521 . . . . . . . . . . . . . . . . . . . 6
3.15. gss-gex-sha1-* . . . . . . . . . . . . . . . . . . . . . 7
3.16. gss-group1-sha1-* . . . . . . . . . . . . . . . . . . . . 7
3.17. gss-group14-sha1-* . . . . . . . . . . . . . . . . . . . 7
3.18. gss-group14-sha256-* . . . . . . . . . . . . . . . . . . 7
3.19. gss-group15-sha512-* . . . . . . . . . . . . . . . . . . 8
3.20. gss-group16-sha512-* . . . . . . . . . . . . . . . . . . 8
3.21. gss-group17-sha512-* . . . . . . . . . . . . . . . . . . 8
3.22. gss-group18-sha512-* . . . . . . . . . . . . . . . . . . 8
3.23. gss-nistp256-sha256-* . . . . . . . . . . . . . . . . . . 8
3.24. gss-nistp384-sha384-* . . . . . . . . . . . . . . . . . . 8
3.25. gss-nistp521-sha512-* . . . . . . . . . . . . . . . . . . 9
3.26. gss-curve25519-sha256-* . . . . . . . . . . . . . . . . . 9
3.27. gss-curve448-sha512-* . . . . . . . . . . . . . . . . . . 9
3.28. rsa1024-sha1 . . . . . . . . . . . . . . . . . . . . . . 9
3.29. rsa2048-sha256 . . . . . . . . . . . . . . . . . . . . . 9
4. Selecting an appropriate hashing algorithm . . . . . . . . . 9
5. Summary Guidance for Key Exchange Method Names . . . . . . . 10
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
7. Security Considerations . . . . . . . . . . . . . . . . . . . 11
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
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