One document matched: draft-paasch-mptcp-tls-authentication-00.ps
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5 737 M
(Internet Engineering Task Force C. Paasch) s
5 726 M
(Internet-Draft Apple, Inc.) s
5 715 M
(Intended status: Experimental A. Ford) s
5 704 M
(Expires: November 28, 2016 Pexip) s
5 693 M
( May 27, 2016) s
5 660 M
( TLS Authentication for MPTCP) s
5 649 M
( draft-paasch-mptcp-tls-authentication-00) s
5 627 M
(Abstract) s
5 605 M
( Multipath TCP \(MPTCP\), described in [4], is an extension to TCP to) s
5 594 M
( provide the ability to simultaneously use multiple paths between) s
5 583 M
( peers.) s
5 561 M
( draft-paasch-mptcp-application-authentication specifies "application) s
5 550 M
( layer authentication" for Multipath TCP, an alternatively negotiated) s
5 539 M
( keying mechanism for MPTCP. This allows keying material to be) s
5 528 M
( sourced from an application layer protocol in order to secure MP_JOIN) s
5 517 M
( handshakes.) s
5 495 M
( This document explains how to use the proposed application-layer) s
5 484 M
( authentication extension with TLS [6], in order to leverage securely) s
5 473 M
( exchanged keys for MPTCP security, whilst simultaneously freeing the) s
5 462 M
( MPTCP token to be used as a channel for additional information.) s
5 440 M
(Status of This Memo) s
5 418 M
( This Internet-Draft is submitted in full conformance with the) s
5 407 M
( provisions of BCP 78 and BCP 79.) s
5 385 M
( Internet-Drafts are working documents of the Internet Engineering) s
5 374 M
( Task Force \(IETF\). Note that other groups may also distribute) s
5 363 M
( working documents as Internet-Drafts. The list of current Internet-) s
5 352 M
( Drafts is at http://datatracker.ietf.org/drafts/current/.) s
5 330 M
( Internet-Drafts are draft documents valid for a maximum of six months) s
5 319 M
( and may be updated, replaced, or obsoleted by other documents at any) s
5 308 M
( time. It is inappropriate to use Internet-Drafts as reference) s
5 297 M
( material or to cite them other than as "work in progress.") s
5 275 M
( This Internet-Draft will expire on November 28, 2016.) s
5 176 M
(Paasch & Ford Expires November 28, 2016 [Page 1]) s
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5 770 M
(Internet-Draft TLS Authentication for MPTCP May 2016) s
5 737 M
(Copyright Notice) s
5 715 M
( Copyright \(c\) 2016 IETF Trust and the persons identified as the) s
5 704 M
( document authors. All rights reserved.) s
5 682 M
( This document is subject to BCP 78 and the IETF Trust's Legal) s
5 671 M
( Provisions Relating to IETF Documents) s
5 660 M
( \(http://trustee.ietf.org/license-info\) in effect on the date of) s
5 649 M
( publication of this document. Please review these documents) s
5 638 M
( carefully, as they describe your rights and restrictions with respect) s
5 627 M
( to this document. Code Components extracted from this document must) s
5 616 M
( include Simplified BSD License text as described in Section 4.e of) s
5 605 M
( the Trust Legal Provisions and are provided without warranty as) s
5 594 M
( described in the Simplified BSD License.) s
5 572 M
(Table of Contents) s
5 550 M
( 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2) s
5 539 M
( 2. Technical Implementation . . . . . . . . . . . . . . . . . . 3) s
5 528 M
( 3. Security Considerations . . . . . . . . . . . . . . . . . . . 4) s
5 517 M
( 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4) s
5 506 M
( 5. References . . . . . . . . . . . . . . . . . . . . . . . . . 4) s
5 495 M
( 5.1. Normative References . . . . . . . . . . . . . . . . . . 4) s
5 484 M
( 5.2. Informative References . . . . . . . . . . . . . . . . . 4) s
5 462 M
(1. Introduction) s
5 440 M
( As described in draft-paasch-mptcp-application-authentication, the) s
5 429 M
( use of "application-layer authentication" allows the Key used in) s
5 418 M
( MPTCP authentication to be provided by the application layer, thus) s
5 407 M
( permitting the use of existing secure communication channels for) s
5 396 M
( exchanging keying material. Furthermore, this decouples the key from) s
5 385 M
( the token and thus allows the token to be used for conveying) s
5 374 M
( additional semantics, such as helping front-end proxies route traffic) s
5 363 M
( to appropriate back-end servers.) s
5 341 M
( TLS [6] provides a secure authentication channel between end hosts,) s
5 330 M
( where keys are not transmitted in the clear. The protocol generates) s
5 319 M
( a master secret for a connection, and a method is described in [3]) s
5 308 M
( for exporting a key generated from this and other properties which) s
5 297 M
( can then be used by the application layer. This document shows how) s
5 286 M
( to use this exported key, along with the method in draft-paasch-) s
5 275 M
( mptcp-application-authentication, for providing alternative keying) s
5 264 M
( mechanisms for MPTCP.) s
5 176 M
(Paasch & Ford Expires November 28, 2016 [Page 2]) s
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5 770 M
(Internet-Draft TLS Authentication for MPTCP May 2016) s
5 737 M
(2. Technical Implementation) s
5 715 M
( As described in draft-paasch-mptcp-application-authentication, the) s
5 704 M
( initial MP_CAPABLE handshake will exchange an arbitrary token for) s
5 693 M
( identifying an MPTCP connection. Whilst it is RECOMMENDED that the) s
5 682 M
( token is hard to guess, it can be used to carry any data, such as) s
5 671 M
( arbitrary routing information, and the security provided by the) s
5 660 M
( application-layer security will mitigate any risks of an attacker) s
5 649 M
( guessing tokens.) s
5 627 M
( When an MPTCP end host wishes to open a new subflow, it will follow) s
5 616 M
( the same exchange as described in [4], however the keying material) s
5 605 M
( \(Key-A and Key-B\) will be derived from the TLS handshake, as) s
5 594 M
( described in [3]. The "label" field MUST be "EXPORTER-MPTCP". The) s
5 583 M
( length used in the key-derivation, following [3] is 16. Key-A are) s
5 572 M
( the 64 most-significant bits, while Key-B are the 64 remaining bits.) s
5 561 M
( This requires the key exchange to have completed before subflows can) s
5 550 M
( be created. Other than the source of the keys, the exchange remains) s
5 539 M
( the same. The MP_CAPABLE and MP_JOIN exchange therefore looks like) s
5 528 M
( this:) s
5 506 M
( Host A Host B) s
5 495 M
( ------------------------ ----------) s
5 484 M
( Address A1 Address A2 Address B1) s
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( ---------- ---------- ----------) s
5 462 M
( | | |) s
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( | | SYN + MP_CAPABLE |) s
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( |--------------------------------------------->|) s
5 429 M
( |<---------------------------------------------|) s
5 418 M
( | SYN/ACK + MP_CAPABLE\(Token-B\) |) s
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( | | |) s
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( | ACK + MP_CAPABLE\(Token-A, Token-B\) |) s
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( |--------------------------------------------->|) s
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( | | |) s
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( | | SYN + MP_JOIN\(Token-B, R-A\) |) s
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( | |------------------------------->|) s
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( | |<-------------------------------|) s
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( | | SYN/ACK + MP_JOIN\(HMAC-B, R-B\) |) s
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( | | |) s
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( | | ACK + MP_JOIN\(HMAC-A\) |) s
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( | |------------------------------->|) s
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( | |<-------------------------------|) s
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( | | ACK |) s
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( HMAC-A = HMAC\(Key=\(Key-A+Key-B\), Msg=\(R-A+R-B\)\)) s
5 242 M
( HMAC-B = HMAC\(Key=\(Key-B+Key-A\), Msg=\(R-B+R-A\)\)) s
5 220 M
( Figure 1: Example Use of MPTCP Authentication) s
5 176 M
(Paasch & Ford Expires November 28, 2016 [Page 3]) s
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5 770 M
(Internet-Draft TLS Authentication for MPTCP May 2016) s
5 737 M
(3. Security Considerations) s
5 715 M
( This draft relies on the security provided by TLS [6] and the key) s
5 704 M
( export mechanism of [3] to provide additional security for the MPTCP) s
5 693 M
( handshake mechanism. These changes remove lingering risks,) s
5 682 M
( originally identified in [7], where an intercept of the initial MPTCP) s
5 671 M
( handshake could allow session hijack.) s
5 649 M
(4. IANA Considerations) s
5 627 M
( IANA would be requested to add a value to the TLS Exporter Label) s
5 616 M
( registry as described in [3]. The label is "EXPORTER-MPTCP".) s
5 594 M
(5. References) s
5 572 M
(5.1. Normative References) s
5 550 M
( [1] Postel, J., "Transmission Control Protocol", STD 7, RFC) s
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( 793, September 1981.) s
5 517 M
( [2] Bradner, S., "Key words for use in RFCs to Indicate) s
5 506 M
( Requirement Levels", BCP 14, RFC 2119, March 1997.) s
5 484 M
( [3] Rescorla, E., "Keying Material Exporters for Transport) s
5 473 M
( Layer Security \(TLS\)", RFC 5705, DOI 10.17487/RFC5705,) s
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( March 2010, <http://www.rfc-editor.org/info/rfc5705>.) s
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( [4] Ford, A., Raiciu, C., Handley, M., Bonaventure, O., and C.) s
5 429 M
( Paasch, "TCP Extensions for Multipath Operation with) s
5 418 M
( Multiple Addresses", draft-ietf-mptcp-rfc6824bis-05 \(work) s
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( in progress\), January 2016.) s
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( [5] National Institute of Science and Technology, "Secure Hash) s
5 374 M
( Standard", Federal Information Processing Standard \(FIPS\)) s
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( 180-3, October 2008,) s
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( <http://csrc.nist.gov/publications/fips/fips180-3/) s
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( fips180-3_final.pdf>.) s
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(5.2. Informative References) s
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( [6] Dierks, T. and E. Rescorla, "The Transport Layer Security) s
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( \(TLS\) Protocol Version 1.2", RFC 5246, DOI 10.17487/) s
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( RFC5246, August 2008,) s
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( <http://www.rfc-editor.org/info/rfc5246>.) s
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( [7] Ford, A., Raiciu, C., Handley, M., and O. Bonaventure,) s
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( "TCP Extensions for Multipath Operation with Multiple) s
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( Addresses", RFC 6824, January 2013.) s
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(Paasch & Ford Expires November 28, 2016 [Page 4]) s
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5 770 M
(Internet-Draft TLS Authentication for MPTCP May 2016) s
5 737 M
(Authors' Addresses) s
5 715 M
( Christoph Paasch) s
5 704 M
( Apple, Inc.) s
5 693 M
( Cupertino) s
5 682 M
( US) s
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( EMail: cpaasch@apple.com) s
5 627 M
( Alan Ford) s
5 616 M
( Pexip) s
5 594 M
( EMail: alan.ford@gmail.com) s
5 176 M
(Paasch & Ford Expires November 28, 2016 [Page 5]) s
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