Internet Engineering Task Force H. Stenn Internet-Draft D. Mills Intended status: Standards Track P. Prindeville Expires: January 3, 2019 Network Time Foundation July 2, 2018 Network Time Protocol: TCP Services: Key Exchange draft-stenn-ntp-tcp-services-keyexchange-00 Abstract This document describes the Key Exchange commands that are included in the NTP TCP Services protocol, which is used to implement the Secure Network Time protocol. 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 January 3, 2019. 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 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Stenn, et al. Expires January 3, 2019 [Page 1] Internet-DraNetwork Time Protocol TCP Services: Key Exchange July 2018 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 2 2. NTP TCP Services: Key Exchange . . . . . . . . . . . . . . . 2 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3 4. Security Considerations . . . . . . . . . . . . . . . . . . . 3 5. Normative References . . . . . . . . . . . . . . . . . . . . 3 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction The NTP Secure Network Time proposal relies on the secure pre- exchange of information to create and validate NTP MACs, This secure pre-exchange is performed using NTP TCP Services. This document describes that protocol. 1.1. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. 2. NTP TCP Services: Key Exchange To perform the key exchange for Secure Network Time, one side opens a TCP connection to the other host, performs any initial handshake, and SHOULD issue a STARTTLS directive to create a secure channel between the two processes. Once that has been done, ... RFC 5705 [RFC5705] RFC 7301 [RFC7301] [Show how this works for Client/Server mode] [Show how this works for symmetric mode] [Show how this work for manycast/multicast] [Show how this would work for broadcast mode where the client can open a connection to the server] Stenn, et al. Expires January 3, 2019 [Page 2] Internet-DraNetwork Time Protocol TCP Services: Key Exchange July 2018 3. IANA Considerations TBD 4. Security Considerations Additional information TBD 5. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC5705] Rescorla, E., "Keying Material Exporters for Transport Layer Security (TLS)", RFC 5705, DOI 10.17487/RFC5705, March 2010, . [RFC5905] Mills, D., Martin, J., Ed., Burbank, J., and W. Kasch, "Network Time Protocol Version 4: Protocol and Algorithms Specification", RFC 5905, DOI 10.17487/RFC5905, June 2010, . [RFC5906] Haberman, B., Ed. and D. Mills, "Network Time Protocol Version 4: Autokey Specification", RFC 5906, DOI 10.17487/RFC5906, June 2010, . [RFC7301] Friedl, S., Popov, A., Langley, A., and E. Stephan, "Transport Layer Security (TLS) Application-Layer Protocol Negotiation Extension", RFC 7301, DOI 10.17487/RFC7301, July 2014, . Authors' Addresses Harlan Stenn Network Time Foundation P.O. Box 918 Talent, OR 97540 US Email: stenn@nwtime.org Stenn, et al. Expires January 3, 2019 [Page 3] Internet-DraNetwork Time Protocol TCP Services: Key Exchange July 2018 David L. Mills Network Time Foundation P.O. Box 918 Talent, OR 97540 US Email: mills@udel.edu Philip Prindeville Network Time Foundation P.O. Box 918 Talent, OR 97540 US Email: prindeville@ntp.org Stenn, et al. Expires January 3, 2019 [Page 4]