Internet Engineering Task Force (IETF)                           A. Kato
Request for Comments: 5932                      NTT Software Corporation
Obsoletes: 4132                                                 M. Kanda
Category: Standards Track                                            NTT
ISSN: 2070-1721                                                 S. Kanno
                                               NTT Software Corporation
                                                              June 2010


                    Camellia Cipher Suites for TLS

Abstract

  This document specifies a set of cipher suites for the Transport
  Security Layer (TLS) protocol to support the Camellia encryption
  algorithm as a block cipher.  It amends the cipher suites originally
  specified in RFC 4132 by introducing counterparts using the newer
  cryptographic hash algorithms from the SHA-2 family.  This document
  obsoletes RFC 4132.

Status of This Memo

  This is an Internet Standards Track document.

  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).  Further information on
  Internet Standards is available in 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/rfc5932.

Copyright Notice

  Copyright (c) 2010 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.



Kato, et al.                 Standards Track                    [Page 1]

RFC 5932             Camellia Cipher Suites for TLS            June 2010


  This document may contain material from IETF Documents or IETF
  Contributions published or made publicly available before November
  10, 2008.  The person(s) controlling the copyright in some of this
  material may not have granted the IETF Trust the right to allow
  modifications of such material outside the IETF Standards Process.
  Without obtaining an adequate license from the person(s) controlling
  the copyright in such materials, this document may not be modified
  outside the IETF Standards Process, and derivative works of it may
  not be created outside the IETF Standards Process, except to format
  it for publication as an RFC or to translate it into languages other
  than English.

1.  Introduction

  This document proposes the addition of new cipher suites to the
  Transport Layer Security (TLS) [RFC5246] protocol to support the
  Camellia [RFC3713] encryption algorithm as a block cipher algorithm,
  adding variants using the SHA-2 family of cryptographic hash
  algorithms [FIPS180-3] to the TLS cipher suite portfolio originally
  specified in RFC 4132 [RFC4132].  This document obsoletes RFC 4132.

  The Camellia algorithm and its properties are described in [RFC3713].

1.1.  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].

2.  Proposed Cipher Suites

  The cipher suites defined here have the following identifiers:

 CipherSuite TLS_RSA_WITH_CAMELLIA_128_CBC_SHA         = { 0x00,0x41 };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA      = { 0x00,0x42 };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA      = { 0x00,0x43 };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA     = { 0x00,0x44 };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA     = { 0x00,0x45 };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA     = { 0x00,0x46 };

 CipherSuite TLS_RSA_WITH_CAMELLIA_256_CBC_SHA         = { 0x00,0x84 };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA      = { 0x00,0x85 };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA      = { 0x00,0x86 };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA     = { 0x00,0x87 };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA     = { 0x00,0x88 };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA     = { 0x00,0x89 };





Kato, et al.                 Standards Track                    [Page 2]

RFC 5932             Camellia Cipher Suites for TLS            June 2010


 CipherSuite TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256      = { 0x00,0xBA };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256   = { 0x00,0xBB };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256   = { 0x00,0xBC };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256  = { 0x00,0xBD };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256  = { 0x00,0xBE };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256  = { 0x00,0xBF };

 CipherSuite TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256      = { 0x00,0xC0 };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256   = { 0x00,0xC1 };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256   = { 0x00,0xC2 };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256  = { 0x00,0xC3 };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256  = { 0x00,0xC4 };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256  = { 0x00,0xC5 };

3.  Cipher Suite Definitions

3.1.  Key Exchange

  The RSA, DHE_RSA, DH_RSA, DHE_DSS, DH_DSS, and DH_anon key exchanges
  are performed as defined in [RFC5246].

3.2.  Cipher

  The CAMELLIA_128_CBC cipher suites use Camellia [RFC3713] in Cipher
  Block Chaining (CBC) mode with a 128-bit key and 128-bit IV; the
  CAMELLIA_256_CBC cipher suites use a 256-bit key and 128-bit IV.

3.3.  Hash and Pseudorandom Function

3.3.1.  Hash and Pseudorandom Function for TLS 1.1

  The cipher suites ending with _SHA use HMAC-SHA1 as the MAC
  algorithm.

  When used with TLS versions prior to 1.2, the pseudorandom function
  (PRF) is calculated as specified in the appropriate version of the
  TLS specification.

3.3.2.  Hash and Pseudorandom Function for TLS 1.2

  The cipher suites ending with _SHA256 use HMAC-SHA-256 as the MAC
  algorithm.  The PRF is the TLS PRF [RFC5246] with SHA-256 as the hash
  function.  These cipher suites MUST NOT be negotiated by TLS 1.1 or
  earlier versions.  Clients MUST NOT offer these cipher suites if they
  do not offer TLS 1.2 or later.  Servers that select an earlier
  version of TLS MUST NOT select one of these cipher suites.





Kato, et al.                 Standards Track                    [Page 3]

RFC 5932             Camellia Cipher Suites for TLS            June 2010


4.  IANA Considerations

  IANA has updated the entries for the following numbers that were
  allocated in RFC 4132 to reference this document:

 CipherSuite TLS_RSA_WITH_CAMELLIA_128_CBC_SHA         = { 0x00,0x41 };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA      = { 0x00,0x42 };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA      = { 0x00,0x43 };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA     = { 0x00,0x44 };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA     = { 0x00,0x45 };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA     = { 0x00,0x46 };

 CipherSuite TLS_RSA_WITH_CAMELLIA_256_CBC_SHA         = { 0x00,0x84 };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA      = { 0x00,0x85 };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA      = { 0x00,0x86 };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA     = { 0x00,0x87 };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA     = { 0x00,0x88 };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA     = { 0x00,0x89 };

  IANA has allocated the following numbers in the TLS Cipher Suite
  Registry:

 CipherSuite TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256      = { 0x00,0xBA };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256   = { 0x00,0xBB };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256   = { 0x00,0xBC };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256  = { 0x00,0xBD };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256  = { 0x00,0xBE };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256  = { 0x00,0xBF };

 CipherSuite TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256      = { 0x00,0xC0 };
 CipherSuite TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256   = { 0x00,0xC1 };
 CipherSuite TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256   = { 0x00,0xC2 };
 CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256  = { 0x00,0xC3 };
 CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256  = { 0x00,0xC4 };
 CipherSuite TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256  = { 0x00,0xC5 };
















Kato, et al.                 Standards Track                    [Page 4]

RFC 5932             Camellia Cipher Suites for TLS            June 2010


5.  Security Considerations

  At the time of writing this document, there are no known weak keys
  for Camellia, and no security problem has been found on Camellia (see
  [NESSIE], [CRYPTREC], and [LNCS]).

  Also, security issues are discussed throughout RFC 5246 [RFC5246],
  especially in Appendices D, E, and F.

6.  References

6.1.  Normative References

  [FIPS180-3]  National Institute of Standards and Technology, "Secure
               Hash Standard (SHS)", FIPS PUB 180, October 2008,
               <http://csrc.nist.gov/publications/fips/fips180-3/
               fips180-3_final.pdf>.

  [RFC2119]    Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

  [RFC3713]    Matsui, M., Nakajima, J., and S. Moriai, "A Description
               of the Camellia Encryption Algorithm", RFC 3713,
               April 2004.

  [RFC5246]    Dierks, T. and E. Rescorla, "The Transport Layer
               Security (TLS) Protocol Version 1.2", RFC 5246,
               August 2008.

6.2.  Informative References

  [CRYPTREC]   Information-technology Promotion Agency (IPA),
               "Cryptography Research and Evaluation Committees",
               <http://www.ipa.go.jp/security/enc/CRYPTREC/
               index-e.html>.

  [LNCS]       Mala, H., Shakiba, M., and M. Dakhil-alian, "New Results
               on Impossible Differential Cryptanalysis of Reduced
               Round Camellia-128", LNCS 5867, November 2009,
               <http://www.springerlink.com/content/e55783u422436g77/>.

  [NESSIE]     "The NESSIE project (New European Schemes for
               Signatures, Integrity and Encryption)",
               <http://www.cosic.esat.kuleuven.be/nessie/>.

  [RFC4132]    Moriai, S., Kato, A., and M. Kanda, "Addition of
               Camellia Cipher Suites to Transport Layer Security
               (TLS)", RFC 4132, July 2005.



Kato, et al.                 Standards Track                    [Page 5]

RFC 5932             Camellia Cipher Suites for TLS            June 2010


Authors' Addresses

  Akihiro Kato
  NTT Software Corporation

  Phone: +81-45-212-9803
  Fax:   +81-45-212-9800
  EMail: [email protected]


  Masayuki Kanda
  NTT

  Phone: +81-422-59-3456
  Fax:   +81-422-59-4015
  EMail: [email protected]


  Satoru Kanno
  NTT Software Corporation

  Phone: +81-45-212-9803
  Fax:   +81-45-212-9800
  EMail: [email protected]



























Kato, et al.                 Standards Track                    [Page 6]


You are viewing proxied material from gopher.fnord.one. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.