5932
PROPOSED STANDARD
Camellia Cipher Suites for TLS
Authors: A. Kato, M. Kanda, S. Kanno
Date: June 2010
Working Group: NON WORKING GROUP
Stream: IETF
Obsoletes:
RFC 4132
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. [STANDARDS-TRACK]
RFC 5932
PROPOSED STANDARD
Internet Engineering Task Force (IETF) A. Kato
Request for Comments: 5932 NTT Software Corporation
Obsoletes: <a href="./rfc4132">4132</a> M. Kanda
Category: Standards Track NTT
ISSN: 2070-1721 S. Kanno
NTT Software Corporation
June 2010
<span class="h1">Camellia Cipher Suites for TLS</span>
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 <a href="./rfc4132">RFC 4132</a> by introducing counterparts using the newer
cryptographic hash algorithms from the SHA-2 family. This document
obsoletes <a href="./rfc4132">RFC 4132</a>.
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 <a href="./rfc5741#section-2">Section 2 of RFC 5741</a>.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
<a href="https://www.rfc-editor.org/info/rfc5932">http://www.rfc-editor.org/info/rfc5932</a>.
Copyright Notice
Copyright (c) 2010 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to <a href="https://www.rfc-editor.org/bcp/bcp78">BCP 78</a> and the IETF Trust's Legal
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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.
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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.
<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>. Introduction</span>
This document proposes the addition of new cipher suites to the
Transport Layer Security (TLS) [<a href="./rfc5246" title=""The Transport Layer Security (TLS) Protocol Version 1.2"">RFC5246</a>] protocol to support the
Camellia [<a href="./rfc3713" title=""A Description of the Camellia Encryption Algorithm"">RFC3713</a>] encryption algorithm as a block cipher algorithm,
adding variants using the SHA-2 family of cryptographic hash
algorithms [<a href="#ref-FIPS180-3" title=""Secure Hash Standard (SHS)"">FIPS180-3</a>] to the TLS cipher suite portfolio originally
specified in <a href="./rfc4132">RFC 4132</a> [<a href="./rfc4132" title=""Addition of Camellia Cipher Suites to Transport Layer Security (TLS)"">RFC4132</a>]. This document obsoletes <a href="./rfc4132">RFC 4132</a>.
The Camellia algorithm and its properties are described in [<a href="./rfc3713" title=""A Description of the Camellia Encryption Algorithm"">RFC3713</a>].
<span class="h3"><a class="selflink" id="section-1.1" href="#section-1.1">1.1</a>. Terminology</span>
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 [<a href="./rfc2119" title=""Key words for use in RFCs to Indicate Requirement Levels"">RFC2119</a>].
<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>. Proposed Cipher Suites</span>
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 };
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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 };
<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>. Cipher Suite Definitions</span>
<span class="h3"><a class="selflink" id="section-3.1" href="#section-3.1">3.1</a>. Key Exchange</span>
The RSA, DHE_RSA, DH_RSA, DHE_DSS, DH_DSS, and DH_anon key exchanges
are performed as defined in [<a href="./rfc5246" title=""The Transport Layer Security (TLS) Protocol Version 1.2"">RFC5246</a>].
<span class="h3"><a class="selflink" id="section-3.2" href="#section-3.2">3.2</a>. Cipher</span>
The CAMELLIA_128_CBC cipher suites use Camellia [<a href="./rfc3713" title=""A Description of the Camellia Encryption Algorithm"">RFC3713</a>] 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.
<span class="h3"><a class="selflink" id="section-3.3" href="#section-3.3">3.3</a>. Hash and Pseudorandom Function</span>
<span class="h4"><a class="selflink" id="section-3.3.1" href="#section-3.3.1">3.3.1</a>. Hash and Pseudorandom Function for TLS 1.1</span>
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.
<span class="h4"><a class="selflink" id="section-3.3.2" href="#section-3.3.2">3.3.2</a>. Hash and Pseudorandom Function for TLS 1.2</span>
The cipher suites ending with _SHA256 use HMAC-SHA-256 as the MAC
algorithm. The PRF is the TLS PRF [<a href="./rfc5246" title=""The Transport Layer Security (TLS) Protocol Version 1.2"">RFC5246</a>] 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.
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<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>. IANA Considerations</span>
IANA has updated the entries for the following numbers that were
allocated in <a href="./rfc4132">RFC 4132</a> 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 };
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<span class="h2"><a class="selflink" id="section-5" href="#section-5">5</a>. Security Considerations</span>
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
[<a href="#ref-NESSIE" title=""The NESSIE project (New European Schemes for Signatures, Integrity and Encryption)"">NESSIE</a>], [<a href="#ref-CRYPTREC" title=""Cryptography Research and Evaluation Committees"">CRYPTREC</a>], and [<a href="#ref-LNCS" title=""New Results on Impossible Differential Cryptanalysis of Reduced Round Camellia-128"">LNCS</a>]).
Also, security issues are discussed throughout <a href="./rfc5246">RFC 5246</a> [<a href="./rfc5246" title=""The Transport Layer Security (TLS) Protocol Version 1.2"">RFC5246</a>],
especially in Appendices D, E, and F.
<span class="h2"><a class="selflink" id="section-6" href="#section-6">6</a>. References</span>
<span class="h3"><a class="selflink" id="section-6.1" href="#section-6.1">6.1</a>. Normative References</span>
[<a id="ref-FIPS180-3">FIPS180-3</a>] National Institute of Standards and Technology, "Secure
Hash Standard (SHS)", FIPS PUB 180, October 2008,
<<a href="http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf">http://csrc.nist.gov/publications/fips/fips180-3/</a>
<a href="http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf">fips180-3_final.pdf</a>>.
[<a id="ref-RFC2119">RFC2119</a>] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", <a href="https://www.rfc-editor.org/bcp/bcp14">BCP 14</a>, <a href="./rfc2119">RFC 2119</a>, March 1997.
[<a id="ref-RFC3713">RFC3713</a>] Matsui, M., Nakajima, J., and S. Moriai, "A Description
of the Camellia Encryption Algorithm", <a href="./rfc3713">RFC 3713</a>,
April 2004.
[<a id="ref-RFC5246">RFC5246</a>] Dierks, T. and E. Rescorla, "The Transport Layer
Security (TLS) Protocol Version 1.2", <a href="./rfc5246">RFC 5246</a>,
August 2008.
<span class="h3"><a class="selflink" id="section-6.2" href="#section-6.2">6.2</a>. Informative References</span>
[<a id="ref-CRYPTREC">CRYPTREC</a>] Information-technology Promotion Agency (IPA),
"Cryptography Research and Evaluation Committees",
<<a href="http://www.ipa.go.jp/security/enc/CRYPTREC/index-e.html">http://www.ipa.go.jp/security/enc/CRYPTREC/</a>
<a href="http://www.ipa.go.jp/security/enc/CRYPTREC/index-e.html">index-e.html</a>>.
[<a id="ref-LNCS">LNCS</a>] Mala, H., Shakiba, M., and M. Dakhil-alian, "New Results
on Impossible Differential Cryptanalysis of Reduced
Round Camellia-128", LNCS 5867, November 2009,
<<a href="http://www.springerlink.com/content/e55783u422436g77/">http://www.springerlink.com/content/e55783u422436g77/</a>>.
[<a id="ref-NESSIE">NESSIE</a>] "The NESSIE project (New European Schemes for
Signatures, Integrity and Encryption)",
<<a href="http://www.cosic.esat.kuleuven.be/nessie/">http://www.cosic.esat.kuleuven.be/nessie/</a>>.
[<a id="ref-RFC4132">RFC4132</a>] Moriai, S., Kato, A., and M. Kanda, "Addition of
Camellia Cipher Suites to Transport Layer Security
(TLS)", <a href="./rfc4132">RFC 4132</a>, July 2005.
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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]
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