TLS P. Wouters, Ed.
Internet-Draft Red Hat
Intended status: Standards Track H. Tschofenig, Ed.
Expires: August 19, 2013 Nokia Siemens Networks
J. Gilmore
S. Weiler
SPARTA, Inc.
T. Kivinen
AuthenTec
February 15, 2013
Out-of-Band Public Key Validation for Transport Layer Security (TLS)
draft-ietf-tls-oob-pubkey-07.txt
Abstract
This document specifies a new certificate type for exchanging raw
public keys in Transport Layer Security (TLS) and Datagram Transport
Layer Security (DTLS) for use with out-of-band public key validation.
Currently, TLS authentication can only occur via X.509-based Public
Key Infrastructure (PKI) or OpenPGP certificates. By specifying a
minimum resource for raw public key exchange, implementations can use
alternative public key validation methods.
One such alternative public key valiation method is offered by the
DNS-Based Authentication of Named Entities (DANE) together with DNS
Security. Another alternative is to utilize pre-configured keys, as
is the case with sensors and other embedded devices. The usage of
raw public keys, instead of X.509-based certificates, leads to a
smaller code footprint.
This document introduces the support for raw public keys in TLS.
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-
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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
Wouters, et al. Expires August 19, 2013 [Page 1]
Internet-Draft TLS OOB Public Key Validation February 2013
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 19, 2013.
Copyright Notice
Copyright (c) 2013 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
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described in the Simplified BSD License.
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Internet-Draft TLS OOB Public Key Validation February 2013
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. New TLS Extension . . . . . . . . . . . . . . . . . . . . . . 5
4. TLS Handshake Extension . . . . . . . . . . . . . . . . . . . 8
4.1. Client Hello . . . . . . . . . . . . . . . . . . . . . . . 8
4.2. Server Hello . . . . . . . . . . . . . . . . . . . . . . . 9
4.3. Certificate Request . . . . . . . . . . . . . . . . . . . 9
4.4. Other Handshake Messages . . . . . . . . . . . . . . . . . 9
4.5. Client authentication . . . . . . . . . . . . . . . . . . 9
5. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6. Security Considerations . . . . . . . . . . . . . . . . . . . 12
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 13
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1. Normative References . . . . . . . . . . . . . . . . . . . 14
9.2. Informative References . . . . . . . . . . . . . . . . . . 14
Appendix A. Example Encoding . . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16
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