draft-ietf-curdle-gss-keyex-sha2-06.txt   draft-ietf-curdle-gss-keyex-sha2-07.txt 
Internet Engineering Task Force S. Sorce Internet Engineering Task Force S. Sorce
Internet-Draft H. Kario Internet-Draft H. Kario
Updates: 4462 (if approved) Red Hat, Inc. Updates: 4462 (if approved) Red Hat, Inc.
Intended status: Standards Track Jul 2, 2018 Intended status: Standards Track Nov 6, 2018
Expires: January 3, 2019 Expires: May 10, 2019
GSS-API Key Exchange with SHA2 GSS-API Key Exchange with SHA2
draft-ietf-curdle-gss-keyex-sha2-06 draft-ietf-curdle-gss-keyex-sha2-07
Abstract Abstract
This document specifies additions and amendments to RFC4462. It This document specifies additions and amendments to RFC4462. It
defines a new key exchange method that uses SHA-2 for integrity and defines a new key exchange method that uses SHA-2 for integrity and
deprecates weak DH groups. The purpose of this specification is to deprecates weak DH groups. The purpose of this specification is to
modernize the cryptographic primitives used by GSS Key Exchanges. modernize the cryptographic primitives used by GSS Key Exchanges.
Status of This Memo Status of This Memo
skipping to change at page 1, line 34 skipping to change at page 1, line 34
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 https://datatracker.ietf.org/drafts/current/. Drafts is at https://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 January 3, 2019. This Internet-Draft will expire on May 10, 2019.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2018 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
(https://trustee.ietf.org/license-info) in effect on the date of (https://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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curves required by [RFC5656]. curves required by [RFC5656].
5.1. Generic GSS-API Key Exchange with ECDH 5.1. Generic GSS-API Key Exchange with ECDH
This section reuses much of the scheme defined in Section 2.1 of This section reuses much of the scheme defined in Section 2.1 of
[RFC4462] and combines it with the scheme defined in Section 4 of [RFC4462] and combines it with the scheme defined in Section 4 of
[RFC5656]; in particular, all checks and verification steps [RFC5656]; in particular, all checks and verification steps
prescribed in Section 4 of [RFC5656] apply here as well. prescribed in Section 4 of [RFC5656] apply here as well.
For curve25519 and curve448 related computations see Section 6 of For curve25519 and curve448 related computations see Section 6 of
[RFC7748]. [RFC7748]; implementations MUST check whether the computed Diffie-
Hellman shared secret is the all-zero value and abort if so.
This section defers to [RFC7546] as the source of information on GSS- This section defers to [RFC7546] as the source of information on GSS-
API context establishment operations, Section 3 being the most API context establishment operations, Section 3 being the most
relevant. All Security Considerations described in [RFC7546] apply relevant. All Security Considerations described in [RFC7546] apply
here too. here too.
The parties generate each an ephemeral key pair, according to The parties generate each an ephemeral key pair, according to
Section 3.2.1 of [SEC1v2]. Keys are verified upon receipt by the Section 3.2.1 of [SEC1v2]. Keys are verified upon receipt by the
parties according to Section 3.2.3.1 of [SEC1v2]. parties according to Section 3.2.3.1 of [SEC1v2].
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