PT-TLS: A TCP-based Posture Transport (PT) Protocol
draft-ietf-nea-pt-tls-05

The information below is for an old version of the document
Document Type Active Internet-Draft (nea WG)
Last updated 2012-06-13 (latest revision 2012-05-29)
Replaces draft-sangster-nea-pt-tls
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state WG Document
Consensus Unknown
Document shepherd None
IESG IESG state Waiting for AD Go-Ahead::Revised I-D Needed
Telechat date
Responsible AD Stephen Farrell
IESG note Steve Hanna (shanna@juniper.net) is the document shephrd.
Send notices to nea-chairs@tools.ietf.org, draft-ietf-nea-pt-tls@tools.ietf.org
Network Working Group                                       P. Sangster
Internet Draft                                     Symantec Corporation
Intended status: Proposed Standard                        N. Cam-Winget
Expires: October 2012                                        J. Salowey
                                                          Cisco Systems
                                                           May 29, 2012

            PT-TLS: A TCP-based Posture Transport (PT) Protocol
                       draft-ietf-nea-pt-tls-05.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
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   This Internet-Draft will expire on November 29, 2012.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors. All rights reserved.

Sangster et al.       Expires November 29, 2012                [Page 1]
Internet-Draft                  PT-TLS                     May 29, 2012

   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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1. Introduction...................................................3
      1.1. Prerequisites.............................................4
      1.2. Message Diagram Conventions...............................4
      1.3. Conventions used in this document.........................4
      1.4. Compatibility with other Specifications...................4
   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............................6
   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....................................14
      3.5. PT-TLS Message Format....................................14
      3.6. IETF Namespace 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. Client Authentication using SASL.........................22
         3.8.1. SASL Entity Authentication Requirements.............23
         3.8.2. SASL in PT-TLS Overview.............................23
         3.8.3. SASL Authentication Flow............................23
         3.8.4. Aborting SASL Authentication........................24
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