Integrity Protection for the Network Service Header (NSH) and Encryption of Sensitive Context Headers
draft-ietf-sfc-nsh-integrity-02
SFC M. Boucadair
Internet-Draft Orange
Intended status: Standards Track T. Reddy
Expires: July 11, 2021 McAfee
D. Wing
Citrix
January 7, 2021
Integrity Protection for the Network Service Header (NSH) and Encryption
of Sensitive Context Headers
draft-ietf-sfc-nsh-integrity-02
Abstract
This specification adds integrity protection and optional encryption
of sensitive metadata directly to the Network Service Header (NSH)
used for Service Function Chaining (SFC).
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on July 11, 2021.
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Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
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include Simplified BSD License text as described in Section 4.e of
Boucadair, et al. Expires July 11, 2021 [Page 1]
Internet-Draft Integrity Protection for the NSH January 2021
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Assumptions and Basic Requirements . . . . . . . . . . . . . 4
4. Design Overview . . . . . . . . . . . . . . . . . . . . . . . 6
4.1. Supported Security Services . . . . . . . . . . . . . . . 6
4.1.1. Encrypt All or a Subset of Context Headers . . . . . 6
4.1.2. Integrity Protection . . . . . . . . . . . . . . . . 7
4.2. One Secret Key, Two Security Services . . . . . . . . . . 9
4.3. Mandatory-to-Implement Authenticated Encryption and HMAC
Algorithms . . . . . . . . . . . . . . . . . . . . . . . 10
4.4. Key Management . . . . . . . . . . . . . . . . . . . . . 10
4.5. New NSH Variable-Length Context Headers . . . . . . . . . 11
4.6. Encapsulation of NSH within NSH . . . . . . . . . . . . . 11
5. New NSH Variable-Length Context Headers . . . . . . . . . . . 12
5.1. MAC#1 Context Header . . . . . . . . . . . . . . . . . . 13
5.2. MAC#2 Context Header . . . . . . . . . . . . . . . . . . 15
6. Timestamp Format . . . . . . . . . . . . . . . . . . . . . . 17
7. Processing Rules . . . . . . . . . . . . . . . . . . . . . . 18
7.1. Generic Behavior . . . . . . . . . . . . . . . . . . . . 18
7.2. MAC NSH Data Generation . . . . . . . . . . . . . . . . . 19
7.3. Encrypted NSH Metadata Generation . . . . . . . . . . . . 20
7.4. Timestamp for Replay Attack . . . . . . . . . . . . . . . 21
7.5. NSH Data Validation . . . . . . . . . . . . . . . . . . . 22
7.6. Decryption of NSH Metadata . . . . . . . . . . . . . . . 23
8. MTU Considerations . . . . . . . . . . . . . . . . . . . . . 23
9. Security Considerations . . . . . . . . . . . . . . . . . . . 24
9.1. MAC#1 . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9.2. MAC#2 . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9.3. Time Synchronization . . . . . . . . . . . . . . . . . . 26
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 26
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 26
12.1. Normative References . . . . . . . . . . . . . . . . . . 26
12.2. Informative References . . . . . . . . . . . . . . . . . 27
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 29
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