RFC6209
Internet Engineering Task Force (IETF) W. Kim Request for Comments: 6209 J. Lee Category: Informational J. Park ISSN: 2070-1721 D. Kwon
NSRI
April 2011
Addition of the ARIA Cipher Suites to Transport Layer Security (TLS)
Abstract
This document specifies a set of cipher suites for the Transport Layer Security (TLS) protocol to support the ARIA encryption algorithm as a block cipher.
Status of This Memo
This document is not an Internet Standards Track specification; it is published for informational purposes.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6209.
Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved.
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.
Contents
Introduction
This document specifies cipher suites for the Transport Layer Security (TLS) RFC5246 protocol to support the ARIA RFC5794 encryption algorithm as a block cipher algorithm. The cipher suites include variants using the SHA-2 family of cryptographic hash functions and ARIA Galois counter mode. Elliptic curve cipher suites and pre-shared key (PSK) cipher suites are also defined.
The cipher suites with SHA-1 are not included in this document. Due to recent analytic work on SHA-1 [Wang05], the IETF is gradually moving away from SHA-1 and towards stronger hash algorithms.
ARIA
ARIA is a general-purpose block cipher algorithm developed by Korean cryptographers in 2003. It is an iterated block cipher with 128-, 192-, and 256-bit keys and encrypts 128-bit blocks in 12, 14, and 16 rounds, depending on the key size. It is secure and suitable for most software and hardware implementations on 32-bit and 8-bit processors. It was established as a Korean standard block cipher algorithm in 2004 [ARIAKS] and has been widely used in Korea, especially for government-to-public services. It was included in PKCS #11 in 2007 [ARIAPKCS]. The algorithm specification and object identifiers are described in RFC5794.
Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC2119.
Proposed Cipher Suites
HMAC-Based Cipher Suites
The first twenty cipher suites use ARIA RFC5794 in Cipher Block Chaining (CBC) mode with a SHA-2 family Hashed Message Authentication Code (HMAC). Eight out of twenty use elliptic curves.
CipherSuite TLS_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3C }; CipherSuite TLS_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3D }; CipherSuite TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3E }; CipherSuite TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3F }; CipherSuite TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x40 }; CipherSuite TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x41 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x42 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x43 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x44 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x45 }; CipherSuite TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x46 }; CipherSuite TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x47 };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x48 }; CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x49 }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4A }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4B }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4C }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4D }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4E }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4F };
GCM-Based Cipher Suites
The next twenty cipher suites use the same asymmetric algorithms as those in the previous section but use the authenticated encryption modes defined in TLS 1.2 with the ARIA in Galois Counter Mode (GCM) [GCM].
CipherSuite TLS_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x50 }; CipherSuite TLS_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x51 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x52 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x53 }; CipherSuite TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x54 }; CipherSuite TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x55 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x56 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x57 }; CipherSuite TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x58 }; CipherSuite TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x59 }; CipherSuite TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5A }; CipherSuite TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5B };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5C }; CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5D }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5E }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5F }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x60 }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x61 }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x62 }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x63 };
PSK Cipher Suites
The next fourteen cipher suites describe PSK cipher suites. Eight cipher suites use an HMAC and six cipher suites use the ARIA Galois Counter Mode.
CipherSuite TLS_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x64 }; CipherSuite TLS_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x65 }; CipherSuite TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x66 }; CipherSuite TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x67 }; CipherSuite TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x68 }; CipherSuite TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x69 }; CipherSuite TLS_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6A }; CipherSuite TLS_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6B }; CipherSuite TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6C }; CipherSuite TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6D }; CipherSuite TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6E }; CipherSuite TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6F }; CipherSuite TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x70 }; CipherSuite TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x71 };
Cipher Suite Definitions
Key Exchange
The RSA, DHE_RSA, DH_RSA, DHE_DSS, DH_DSS, DH_anon, ECDH, and ECDHE key exchanges are performed as defined in RFC5246.
Cipher
The ARIA_128_CBC cipher suites use ARIA RFC5794 in CBC mode with a 128-bit key and 128-bit Initialization Vector (IV); the ARIA_256_CBC cipher suites use a 256-bit key and 128-bit IV.
AES-authenticated encryption with additional data algorithms, AEAD_AES_128_GCM, and AEAD_AES_256_GCM are described in RFC5116. AES GCM cipher suites for TLS are described in RFC5288. AES and ARIA share common characteristics, including key sizes and block length. ARIA_128_GCM and ARIA_256_GCM are defined according to those characteristics of AES.
PRFs
The pseudorandom functions (PRFs) SHALL be as follows:
a. For cipher suites ending with _SHA256, the PRF is the TLS PRF
RFC5246 using SHA-256 as the hash function.
b. For cipher suites ending with _SHA384, the PRF is the TLS PRF
RFC5246 using SHA-384 as the hash function.
PSK Cipher Suites
Pre-shared key cipher suites for TLS are described in RFC4279, RFC4785, RFC5487, and RFC5489.
Security Considerations
At the time of writing this document, no security problems have been found on ARIA (see [YWL]).
The security considerations in the following RFCs apply to this document as well: RFC4279 RFC4785 RFC5116 RFC5288 RFC5289 RFC5487 and [GCM].
IANA Considerations
IANA has allocated the following numbers in the TLS Cipher Suite Registry:
CipherSuite TLS_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3C }; CipherSuite TLS_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3D }; CipherSuite TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3E }; CipherSuite TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3F }; CipherSuite TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x40 }; CipherSuite TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x41 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x42 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x43 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x44 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x45 }; CipherSuite TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x46 }; CipherSuite TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x47 };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x48 }; CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x49 }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4A }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4B }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4C }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4D }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4E }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4F };
CipherSuite TLS_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x50 }; CipherSuite TLS_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x51 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x52 }; CipherSuite TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x53 }; CipherSuite TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x54 }; CipherSuite TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x55 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x56 }; CipherSuite TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x57 }; CipherSuite TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x58 }; CipherSuite TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x59 }; CipherSuite TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5A }; CipherSuite TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5B };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5C }; CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5D }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5E }; CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5F }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x60 }; CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x61 }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x62 }; CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x63 };
CipherSuite TLS_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x64 }; CipherSuite TLS_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x65 }; CipherSuite TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x66 }; CipherSuite TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x67 }; CipherSuite TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x68 }; CipherSuite TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x69 }; CipherSuite TLS_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6A }; CipherSuite TLS_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6B }; CipherSuite TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6C }; CipherSuite TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6D }; CipherSuite TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6E }; CipherSuite TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6F }; CipherSuite TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x70 }; CipherSuite TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x71 };
References
Normative References
[GCM] Dworkin, M., "Recommendation for Block Cipher Modes of
Operation: Galois/Counter Mode (GCM) and GMAC", NIST
SP 800-38D, November 2007.
RFC2119 Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
RFC4279 Eronen, P. and H. Tschofenig, "Pre-Shared Key
Ciphersuites for Transport Layer Security (TLS)",
RFC 4279, December 2005.
RFC4785 Blumenthal, U. and P. Goel, "Pre-Shared Key (PSK)
Ciphersuites with NULL Encryption for Transport Layer
Security (TLS)", RFC 4785, January 2007.
RFC5116 McGrew, D., "An Interface and Algorithms for
Authenticated Encryption", RFC 5116, January 2008.
RFC5246 Dierks, T. and E. Rescorla, "The Transport Layer Security
(TLS) Protocol Version 1.2", RFC 5246, August 2008.
RFC5288 Salowey, J., Choudhury, A., and D. McGrew, "AES Galois
Counter Mode (GCM) Cipher Suites for TLS", RFC 5288, August 2008.
RFC5289 Rescorla, E., "TLS Elliptic Curve Cipher Suites with SHA-
256/384 and AES Galois Counter Mode (GCM)", RFC 5289, August 2008.
RFC5487 Badra, M., "Pre-Shared Key Cipher Suites for TLS with
SHA-256/384 and AES Galois Counter Mode", RFC 5487, March 2009.
RFC5489 Badra, M. and I. Hajjeh, "ECDHE_PSK Cipher Suites for
Transport Layer Security (TLS)", RFC 5489, March 2009.
RFC5794 Lee, J., Lee, J., Kim, J., Kwon, D., and C. Kim, "A
Description of the ARIA Encryption Algorithm", RFC 5794, March 2010.
Informative References
[ARIAKS] Korean Agency for Technology and Standards, "128 bit
block encryption algorithm ARIA - Part 1: General (in
Korean)", KS X 1213-1:2009, December 2009.
[ARIAPKCS] RSA Laboratories, "Additional PKCS #11 Mechanisms",
PKCS #11 v2.20 Amendment 3 Revision 1, January 2007.
[Wang05] Wang, X., Yin, Y., and H. Yu, "Finding Collisions in the
Full SHA-1", CRYPTO 2005, LNCS vol.3621, pp.17-36,
August 2005.
[YWL] Li, Y., Wu, W., and L. Zhang, "Integral attacks on
reduced-round ARIA block cipher", ISPEC 2010,
LNCS Vol.6047, pp. 19-29, May 2010.
Authors' Addresses
Woo-Hwan Kim National Security Research Institute P.O.Box 1, Yuseong Daejeon 305-350 Korea
EMail: [email protected]
Jungkeun Lee National Security Research Institute P.O.Box 1, Yuseong Daejeon 305-350 Korea
EMail: [email protected]
Je-Hong Park National Security Research Institute P.O.Box 1, Yuseong Daejeon 305-350 Korea
EMail: [email protected]
Daesung Kwon National Security Research Institute P.O.Box 1, Yuseong Daejeon 305-350 Korea
EMail: [email protected]
