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QUIC                                                       G. Montenegro
Internet-Draft                                                  N. Banks
Intended status: Standards Track                      P. Balasubramanian
Expires: March 10, 2019                            Microsoft Corporation
                                                       September 6, 2018


             QUIC Negotiation for Packet Number Protection
                 draft-montenegro-quic-negotiate-pnp-00

Abstract

   This document defines an extension to reduce the cost of QUIC
   deployment in environments like datacenters by allowing packet number
   protection to be optionally disabled.

Note to Readers

   Discussion of this draft takes place on the QUIC working group
   mailing list (quic@ietf.org), which is archived at
   https://mailarchive.ietf.org/arch/search/?email_list=quic [1].

   Working Group information can be found at https://github.com/quicwg
   [2]; source code and issues list for this draft can be found at
   https://github.com/quicwg/base-drafts/labels/-recovery [3].

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 March 10, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.




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   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions and Definitions . . . . . . . . . . . . . . . . .   2
   3.  Transport Parameter to Disable Packet Number Protection . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     6.2.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   QUIC is a new transport for the internet.  In its generality, there
   are features which are not well suited for some environments.  In
   particular, QUIC uses Packet Number Protection (PNP) to prevent
   ossification and to provide unlinkability upon (voluntary) migration.
   However, there are environments where these are not a concern, in
   particular, connections within a datacenter.

   This document defines a negotiation mechanism using transport
   parameters to disable PNP.  Internet facing nodes MUST not disable
   PNP, so browsers, for example, should not implement this extension.
   On the other hand, configured nodes within a datacenter could turn
   off PNP in their exchanges to avoid the CPU cost that PNP implies.

2.  Conventions and Definitions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.







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3.  Transport Parameter to Disable Packet Number Protection

   This document defines a new transport parameter for QUIC
   [QUIC-TRANSPORT]:

   disable_packet_number_protection (0x000c ?, value TBD):  The endpoint
      is disabling packet number protection as specified in [QUIC-TLS].
      This parameter is a zero-length value.  This parameter only
      affects short headers.

   A successful negotiation of the "disable_packet_number_protection"
   parameter requires both peers to send this transport parameter.

   Peers that have successfully negotiated the
   "disable_packet_number_protection" parameter MUST NOT use packet
   number protection on short header packets.

4.  Security Considerations

   Per section 6.11.5 of [QUIC-TLS], PNP is used as a partial mitigation
   against linkability, and to prevent ossification.  The
   "disable_packet_number_protection" parameter should be negotiated in
   environments in which these are not a concern.

5.  IANA Considerations

   Per section 13.1 of [QUIC-TLS], this document requests IANA assign a
   value for the new transport parameter and record it in the registry
   for "QUIC Transport Parameters" under the "QUIC Protocol" heading.
   IANA is further requested to assign a value with the first byte in
   the range 0x00 to 0xfe (in hexadecimal) as follows:

       +--------+----------------------------------+---------------+
       | Value  | Parameter Name                   | Specification |
       +--------+----------------------------------+---------------+
       | 0x000c | disable_packet_number_protection | This document |
       +--------+----------------------------------+---------------+

6.  References

6.1.  Normative References

   [QUIC-TLS]
              Thomson, M., Ed. and S. Turner, Ed., "Using Transport
              Layer Security (TLS) to Secure QUIC", draft-ietf-quic-tls-
              latest (work in progress).





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   [QUIC-TRANSPORT]
              Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based
              Multiplexed and Secure Transport", draft-ietf-quic-
              transport-latest (work in progress).

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

6.2.  URIs

   [1] https://mailarchive.ietf.org/arch/search/?email_list=quic

   [2] https://github.com/quicwg

   [3] https://github.com/quicwg/base-drafts/labels/-recovery

Authors' Addresses

   Gabriel Montenegro
   Microsoft Corporation

   Email: Gabriel.Montenegro@Microsoft.com


   Nick Banks
   Microsoft Corporation

   Email: NiBanks@Microsoft.com


   Praveen Balasubramanian
   Microsoft Corporation

   Email: PravB@Microsoft.com











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