draft-ietf-kitten-tls-channel-bindings-for-tls13-10.txt   draft-ietf-kitten-tls-channel-bindings-for-tls13-11.txt 
Transport Layer Security S. Whited Transport Layer Security S. Whited
Internet-Draft 15 October 2021 Internet-Draft 18 October 2021
Updates: 5801, 5802, 5929, 8446 (if approved) Updates: 5801, 5802, 5929, 8446 (if approved)
Intended status: Standards Track Intended status: Standards Track
Expires: 18 April 2022 Expires: 21 April 2022
Channel Bindings for TLS 1.3 Channel Bindings for TLS 1.3
draft-ietf-kitten-tls-channel-bindings-for-tls13-10 draft-ietf-kitten-tls-channel-bindings-for-tls13-11
Abstract Abstract
This document defines a channel binding type, tls-exporter, that is This document defines a channel binding type, tls-exporter, that is
compatible with TLS 1.3 in accordance with RFC 5056, On Channel compatible with TLS 1.3 in accordance with RFC 5056, On Channel
Binding. Furthermore it updates the "default" channel binding to the Binding. Furthermore it updates the "default" channel binding to the
new binding for versions of TLS greater than 1.2. This document new binding for versions of TLS greater than 1.2. This document
updates RFC5801, RFC5802, RFC5929, and RFC8446. updates RFC5801, RFC5802, RFC5929, and RFC8446.
Status of This Memo Status of This Memo
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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 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 18 April 2022. This Internet-Draft will expire on 21 April 2022.
Copyright Notice Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the Copyright (c) 2021 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 (https://trustee.ietf.org/ Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document. license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights Please review these documents carefully, as they describe your rights
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Label: The ASCII string "EXPORTER-Channel-Binding" with no Label: The ASCII string "EXPORTER-Channel-Binding" with no
terminating NUL. terminating NUL.
Context value: Zero-length string. Context value: Zero-length string.
Length: 32 bytes. Length: 32 bytes.
This channel binding mechanism is defined only when TLS cipher This channel binding mechanism is defined only when TLS cipher
negotiation results in unique master secrets, which is true of TLS negotiation results in unique master secrets, which is true of TLS
1.3 when renegotiation is disabled. 1.3 which always behaves as if it were using the extended master
secret fix required by previous versions of TLS (see [RFC8446]
appendix D).
3. TLS 1.3 with SCRAM or GSS-API over SASL 3. TLS 1.3 with SCRAM or GSS-API over SASL
SCRAM [RFC5802] and GSS-API over SASL [RFC5801] define "tls-unique" SCRAM [RFC5802] and GSS-API over SASL [RFC5801] define "tls-unique"
as the default channel binding to use over TLS. As "tls-unique" is as the default channel binding to use over TLS. As "tls-unique" is
not defined for TLS 1.3 (and greater), this document updates not defined for TLS 1.3 (and greater), this document updates
[RFC5801] and [RFC5802] to use "tls-exporter" as the default channel [RFC5801] and [RFC5802] to use "tls-exporter" as the default channel
binding over TLS 1.3 (and greater). binding over TLS 1.3 (and greater).
4. Security Considerations 4. Security Considerations
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Subject: Registration of channel binding tls-exporter Subject: Registration of channel binding tls-exporter
Channel binding unique prefix: tls-exporter Channel binding unique prefix: tls-exporter
Channel binding type: unique Channel binding type: unique
Channel type: TLS [RFC8446] Channel type: TLS [RFC8446]
Published specification: draft-ietf-kitten-tls-channel-bindings-for- Published specification: draft-ietf-kitten-tls-channel-bindings-for-
tls13-10 tls13-11
Channel binding is secret: no Channel binding is secret: no
Description: The EKM value obtained from the current TLS connection. Description: The EKM value obtained from the current TLS connection.
Intended usage: COMMON Intended usage: COMMON
Person and email address to contact for further information: Sam Person and email address to contact for further information: Sam
Whited <sam@samwhited.com>. Whited <sam@samwhited.com>.
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