PT-TLS: A TCP-based Posture Transport (PT) Protocol
draft-ietf-nea-pt-tls-01

The information below is for an old version of the document
Document Type Active Internet-Draft (nea WG)
Last updated 2011-09-19 (latest revision 2011-06-13)
Stream IETF
Intended RFC status (None)
Formats plain text pdf html
Stream WG state WG Document
Document shepherd None
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                        P. Sangster
Internet Draft                                      Symantec Corporation
Intended status: Proposed Standard                         N. Cam-Winget
Expires: September 2011                                       J. Salowey
                                                           Cisco Systems
                                                      September 16, 2011

            PT-TLS: A TCP-based Posture Transport (PT) Protocol
                       draft-ietf-nea-pt-tls-01.txt

Abstract

   This document specifies PT-TLS, a TCP-based Posture Transport (PT)
   protocol.  The PT-TLS protocol carries the Network Endpoint
   Assessment (NEA) message exchange under the protection of a Transport
   Layer Security (TLS) secured tunnel.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html

   This Internet-Draft will expire on September 16, 2011.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors. All rights reserved.

Sangster et al.         Expires March 16, 2012                 [Page 1]
Internet-Draft                  PT-TLS               September 16, 2011

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://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...................................................4
      1.1. Prerequisites.............................................4
      1.2. Message Diagram Conventions...............................4
      1.3. Conventions used in this document.........................5
   2. Design Considerations..........................................5
      2.1. Benefits of TCP/IP Connectivity...........................5
      2.2. Leveraging Proven TLS Security............................6
      2.3. TLV-Oriented Based Message Encapsulation..................6
      2.4. No Change to Base TLS Protocol............................7
   3. PT-TLS Protocol................................................7
      3.1. Initiating a PT-TLS Session...............................8
         3.1.1. Issues with Server Initiated PT-TLS Sessions.........8
         3.1.2. Establish or Re-Use Existing PT-TLS Session..........9
      3.2. TCP Port Usage............................................9
      3.3. Preventing MITM Attacks with Channel Bindings.............9
      3.4. PT-TLS Message Flow......................................10
         3.4.1. Assessment Triggers.................................10
         3.4.2. PT-TLS Message Exchange Phases......................10
            3.4.2.1. TLS Setup Phase................................11
            3.4.2.2. PT-TLS Negotiation Phase.......................12
            3.4.2.3. PT-TLS Data Transport Phase....................13
         3.4.3. TLS Requirements....................................13
      3.5. PT-TLS Message Format....................................14
      3.6. IETF Standard PT-TLS Message Types.......................17
      3.7. PT-TLS Version Negotiation...............................20
         3.7.1. Version Request Message.............................20
         3.7.2. Version Response Message............................21
      3.8. Entity Authentication using SASL.........................22
         3.8.1. SASL Entity Authentication Requirements.............22
         3.8.2. SASL in PT-TLS Overview.............................22
         3.8.3. Initiating the SASL Authentication..................23
         3.8.4. SASL Authentication Flow............................23
Show full document text