S/MIME WG Sean Turner, IECA Internet Draft February 12, 2008 Intended Status: Information Updates: 3278 (once approved) Expires: August 12, 2008 Update to Use of Elliptic Curve Cryptography (ECC) Algorithms in Cryptographic Message Syntax (CMS) draft-ietf-smime-rfc3278-update-00.txt Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html This Internet-Draft will expire on July 12, 2008. Copyright Notice Copyright (C) The IETF Trust (2008). Abstract RFC 3278 describes how to use Elliptic Curve Cryptography (ECC) public-key algorithms in the Cryptographic Message Syntax (CMS). This document updates RFC 3278 to add support for the SHA2 family of hash algorithms. Turner Expires August 12, 2008 [Page 1] Internet-Draft RFC 3278 Update January 2008 Conventions used in this document 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 [MUST]. Discussion This draft is being discussed on the 'ietf-smime' mailing list. To subscribe, send a message to ietf-smime-request@imc.org with the single word subscribe in the body of the message. There is a Web site for the mailing list at . Table of Contents 1. Introduction...................................................2 2. Updates to Paragraph 2.1.1.....................................3 3. Updates to Paragraph 8.1.......................................3 4. Updates to Paragraph 9.........................................5 5. Changes to Security Considerations.............................5 6. Security Considerations........................................5 7. IANA Considerations............................................5 8. References.....................................................6 8.1. Normative References......................................6 8.2. Informative References....................................6 1. Introduction RFC 3278 describes how to use Elliptic Curve Cryptography (ECC) public-key algorithms in the Cryptographic Message Syntax (CMS). This document updates RFC 3278 to add support for the SHA2 family of hash algorithms. There are changes to four paragraphs: - Paragraph 2.1.1 limited the digest algorithm to SHA-1. This document expands the allowed algorithms to SHA-224, SHA-256, SHA- 284, and SHA-512. - Paragraph 8.1 listed the algorithm identifiers for SHA-1 and SHA-1 with ECDSA. This document adds algorithms for SHA-224, SHA-256, SHA-284, and SHA-512 and SHA-224, SHA-256, SHA-284, and SHA-512 with ECDSA. - Paragraph 9 references need to be updated. Turner Expires August 12, 2008 [Page 2] Internet-Draft RFC 3278 Update January 2008 - Security considerations paragraph referring to definitions of SHA- 224, SHA-256, SHA-284, and SHA-512 needs to be deleted. 2. Updates to Paragraph 2.1.1 Old: digestAlgorithm MUST contain the algorithm identifier sha-1 (see Section 8.1) which identifies the SHA-1 hash algorithm. signatureAlgorithm contains the algorithm identifier ecdsa-with- SHA1 (see Section 8.1) which identifies the ECDSA signature algorithm. New: digestAlgorithm MUST contain the algorithm identifier of the hash algorithm (see Section 8.1): id-sha1 identifies the SHA-1 hash algorithm, id-sha224 identifies the SHA-224 hash algorithm, id- sha256 identifies the SHA-256 hash algorithm, id-sha384 identifies the SHA-384 algorithm, and id-sha512 identifies the SHA-512 algorithm. signatureAlgorithm contains the signature algorithm identifier (see Section 8.1): ecdsa-with-SHA1, ecdsa-with-SHA224, ecdsa- with-SHA256, ecdsa-with-SHA384, ecdsa-with-SHA512. 3. Updates to Paragraph 8.1 Old: The algorithm identifiers used in this document are taken from [X9.62], [SEC1] and [SEC2]. The following object identifier indicates the hash algorithm used in this document: sha-1 OBJECT IDENTIFIER ::= { iso(1) identified-organization(3) oiw(14) secsig(3) algorithm(2) 26 } New: The algorithm identifiers used in this document are taken from [SMIME-SHA2] The following object identifier indicates the hash algorithm used in this document: Turner Expires August 12, 2008 [Page 3] Internet-Draft RFC 3278 Update January 2008 id-sha1 OBJECT IDENTIFIER ::= { iso(1) identified- organization(3) oiw(14) secsig(3) algorithm(2) 26 } id-sha224 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 4 } id-sha256 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1 } id-sha384 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 2 } id-sha512 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 3 } Old: The following object identifier indicates the digital signature algorithm used in this document: ecdsa-with-SHA1 OBJECT IDENTIFIER ::= { ansi-x9-62 signatures(4) 1 } New: The following object identifier indicates the digital signature algorithm used in this document: ecdsa-with-SHA1 OBJECT IDENTIFIER ::= { ansi-x9-62 signatures(4) 1 } ecdsa-with-SHA224 OBJECT IDENTIFIER ::= { ansi-x9-62 signatures(4) ecdsa-with-SHA2(3) 1 } ecdsa-with-SHA256 OBJECT IDENTIFIER ::= { ansi-x9-62 signatures(4) ecdsa-with-SHA2(3) 2 } ecdsa-with-SHA384 OBJECT IDENTIFIER ::= { ansi-x9-62 signatures(4) ecdsa-with-SHA2(3) 3 } ecdsa-with-SHA512 OBJECT IDENTIFIER ::= { ansi-x9-62 signatures(4) ecdsa-with-SHA2(3) 4 } Turner Expires August 12, 2008 [Page 4] Internet-Draft RFC 3278 Update January 2008 4. Updates to Paragraph 9 Add the following reference: [SMIME-SHA2] Turner, S., "Using SHA2 Algorithms with Cryptographic Message Syntax", work-in-progress. Update the following references: Old: [PKI-ALG] Bassham, L., Housley R. and W. Polk, "Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and CRL Profile", RFC 3279, April 2002. [FIPS-180] FIPS 180-1, "Secure Hash Standard", National Institute of Standards and Technology, April 17, 1995. New: [PKI-ALG] Turner, S., Brown, D., Yiu, K., Housley, R., and W. Polk, " Elliptic Curve Cryptography Subject Public Key Information", work-in-progress. [FIPS] FIPS 180-2, "Secure Hash Standard", National Institute of Standards and Technology, August 1, 2002. 5. Changes to Security Considerations Delete the following: When 256, 384, and 512 bit hash functions succeed SHA-1 in future revisions of [FIPS], [FIPS-186-2], [X9.62] and [SEC1], then they can similarly succeed SHA-1 in a future revision of this document. 6. Security Considerations No new security considerations to those already specified in [RFC3278], [SMIME-SHA2], and [PKI-ALG]. 7. IANA Considerations None: All identifiers are already registered. Please remove this section prior to publication as an RFC. Turner Expires August 12, 2008 [Page 5] Internet-Draft RFC 3278 Update January 2008 8. References 8.1. Normative References [MUST] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, BCP 14, March 1997. [PKI-ALG] Turner, S., Brown, D., Yiu, K., Housley, R., and W. Polk, "Elliptic Curve Cryptography Subject Public Key Information", work-in-progress. [SMIME-SHA2] Turner, S., "Using SHA2 Algorithms with Cryptographic Message Syntax", work-in-progress. [RFC3278] Blake-Wilson, S., Brown, D., and P. Lambert, "Use of Elliptic Curve Cryptography (ECC) Algorithms in Cryptographic Message Syntax (CMS)", RFC 3278, April 2002. 8.2. Informative References None. Turner Expires August 12, 2008 [Page 6] Internet-Draft RFC 3278 Update January 2008 Author's Addresses Sean Turner IECA, Inc. 3057 Nutley Street, Suite 106 Fairfax, VA 22031 USA Email: turners@ieca.com Turner Expires August 12, 2008 [Page 7] Internet-Draft RFC 3278 Update January 2008 Full Copyright Statement Copyright (C) The IETF Trust (2008). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. 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