Network Working Group A. Kato Internet-Draft NTT Software Corporation Obsoletes: 4132 (if approved) M. Kanda Intended status: Standards Track Nippon Telegraph and Telephone Expires: October 7, 2009 Corporation S. Kanno NTT Software Corporation April 5, 2009 Camellia Cipher Suites for TLS draft-kato-tls-rfc4132bis-04 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. 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. 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The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on October 7, 2009. Copyright Notice Kato, et al. Expires October 7, 2009 [Page 1] Internet-Draft Camellia Cipher Suites for TLS April 2009 Copyright (c) 2009 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 in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. 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 ciphersuites originally specifed in RFC 4132 by counterparts using the newer cryptographic hash algorithms from the SHA-2 familiy. This document obsoletes RFC 4132. 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 algorithm specification and object identifiers 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: Kato, et al. Expires October 7, 2009 [Page 2] Internet-Draft Camellia Cipher Suites for TLS April 2009 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 }; CipherSuite TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; 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 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. Kato, et al. Expires October 7, 2009 [Page 3] Internet-Draft Camellia Cipher Suites for TLS April 2009 When used with TLS versions prior to 1.2, the 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. For TLS version 1.2, the PRF is the TLS PRF [RFC5246] with SHA-256 as the hash function. 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 which select an earlier version of TLS MUST NOT select one of thse cipher suites. 4. IANA Considerations IANA has already allocated the following numbers for RFC 4132, and is requested to update them 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 is requested to allocate (has allocated) the following numbers in the TLS Cipher Suite Registry: Kato, et al. Expires October 7, 2009 [Page 4] Internet-Draft Camellia Cipher Suites for TLS April 2009 CipherSuite TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; CipherSuite TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 = { TBD,TBD }; 5. Security Considerations At the time of writing this document, there are no known weak keys for Camellia. Also, Security issues are discussed throughout RFC 5246 [RFC5246], especially in Appendices D, E, and F of [RFC5246]. 6. References 6.1. Normative References [FIPS180-3] National Institute of Standards and Technology, "Secure Hash Standard (SHS)", FIPS PUB 180, October 2008, . [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 [Camellia web site] "Camellia web site", . Kato, et al. Expires October 7, 2009 [Page 5] Internet-Draft Camellia Cipher Suites for TLS April 2009 [FIPS.197.2001] National Institute of Standards and Technology, "Advanced Encryption Standard (AES)", FIPS PUB 197, November 2001, < http://csrc.nist.gov/publications/fips/fips197/ fips-197.pdf>. [ISO/IEC 18033-3] International Organization for Standardization, "Information technology - Security techniques - Encryption algorithms - Part 3: Block ciphers", ISO/IEC 18033-3, July 2005. [RFC4132] Moriai, S., Kato, A., and M. Kanda, "Addition of Camellia Cipher Suites to Transport Layer Security (TLS)", RFC 4132, July 2005. [open source license] "Camellia open source software", . Authors' Addresses Akihiro Kato NTT Software Corporation Phone: +81-45-212-7577 Fax: +81-45-212-9800 Email: akato@po.ntts.co.jp Masayuki Kanda Nippon Telegraph and Telephone Corporation Phone: +81-422-59-3456 Fax: +81-422-59-4015 Email: kanda.masayuki@lab.ntt.co.jp Satoru Kanno NTT Software Corporation Phone: +81-45-212-7577 Fax: +81-45-212-9800 Email: kanno-s@po.ntts.co.jp Kato, et al. Expires October 7, 2009 [Page 6]