Using GOST ciphers in ESP and IKEv2
draft-smyslov-esp-gost-04

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Network Working Group                                         V. Smyslov
Internet-Draft                                                ELVIS-PLUS
Intended status: Informational                          October 26, 2020
Expires: April 29, 2021

                  Using GOST ciphers in ESP and IKEv2
                       draft-smyslov-esp-gost-04

Abstract

   This document defines a set of encryption transforms for use in the
   Encapsulating Security Payload (ESP) and in the Internet Key Exchange
   version 2 (IKEv2) protocols.  The transforms are based on Russian
   cryptographic standard algorithms (GOST) in a Multilinear Galois Mode
   (MGM).

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   This Internet-Draft will expire on April 29, 2021.

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Smyslov                  Expires April 29, 2021                 [Page 1]
Internet-Draft         GOST ciphers in ESP & IKEv2          October 2020

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Transforms Description  . . . . . . . . . . . . . . . . . . .   3
     4.1.  Tree-based External Re-Keying . . . . . . . . . . . . . .   4
     4.2.  Initialization Vector Format  . . . . . . . . . . . . . .   5
     4.3.  Nonce Format for MGM  . . . . . . . . . . . . . . . . . .   5
       4.3.1.  MGM Nonce Format for "Kuznyechik" based Transforms  .   6
       4.3.2.  MGM Nonce Format for "Magma" based Transforms . . . .   6
     4.4.  Keying Material . . . . . . . . . . . . . . . . . . . . .   7
     4.5.  Integrity Check Value . . . . . . . . . . . . . . . . . .   7
     4.6.  Plaintext Padding . . . . . . . . . . . . . . . . . . . .   8
     4.7.  AAD Construction  . . . . . . . . . . . . . . . . . . . .   8
       4.7.1.  ESP AAD . . . . . . . . . . . . . . . . . . . . . . .   8
       4.7.2.  IKEv2 AAD . . . . . . . . . . . . . . . . . . . . . .  10
     4.8.  Using Transforms  . . . . . . . . . . . . . . . . . . . .  10
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Appendix A.  Test Vectors . . . . . . . . . . . . . . . . . . . .  13
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   This document defines four encryption transforms for the
   Encapsulating Security Payload (ESP) [RFC4303] and the Internet Key
   Exchange version 2 (IKEv2) [RFC7296].  These transforms are based on
   two block ciphers from Russian cryptographic standard algorithms
   (often called "GOST" algorithms) - "Kuznyechik" [RFC7801] and "Magma"
   [RFC8891].  These ciphers are used in Multilinear Galois Mode (MGM)
   [I-D.smyshlyaev-mgm] which provides Authenticated Encryption with
   Associated Data (AEAD).  In addition these transforms use external
   re-keying mechanism, described in [RFC8645] to limit a load on a
   session key.

2.  Requirements Language

   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.