Network Working Group Sean Turner, IECA
Internet Draft August 11, 2010
Updates: I-D.turner-encryptedkeypackagecontenttype-algs (once approved)
Intended Status: Standard Track
Expires: February 11, 2010
Elliptic Curve Algorithms for Cryptographic Message Syntax (CMS)
Encrypted Key Package Content Type
draft-turner-ekpct-algs-update-00.txt
Abstract
This document describes the conventions for using several Elliptic
Curve cryptographic algorithms with the Cryptographic Message Syntax
(CMS) encrypted key package content type. Specifically, it includes
conventions necessary to implement ECDH with EnvelopedData and ECDSA
with SignedData.
Status of this Memo
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Copyright Notice
Copyright (c) 2010 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Internet-Draft EC Algorithms for CMS Encrypted Key Packages August 2009
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1. Introduction
This document describes the conventions for using Elliptic Curve
cryptographic algorithms with the Cryptographic Message Syntax (CMS)
encrypted key package content type
[I-D.turner-encryptedkeypackagecontenttype]. Specifically, it
includes conventions necessary to implement the following CMS content
types: EnvelopedData [RFC5652] and SignedData [RFC5652]. This
document updates [I-D.turner-encryptedkeypackagecontenttype-algs].
Familiarity with [I-D.turner-encryptedkeypackagecontenttype-algs] and
[RFC5753] is assumed.
This document does not define any new algorithms; instead it refers
to previously defined algorithms.
1.1. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
[RFC2119].
2. EnvelopedData
When key agreement is used, ECDH [I-D.mcgrew-fundamental-ecc] MAY be
supported.
3. SignedData
If an implementation encapsulates an EncryptedKeyPacakge with a
SignedData [RFC5652], then it MAY support the signature scheme ECDSA
[I-D.mcgrew-fundamental-ecc].
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4. Public Key Sizes
The easiest way to implement the SignedData and EnvelopedData is with
public key certificates [RFC5280][RFC5480]. If an implementation
supports ECDSA or ECDH, then it MUST support keys on P-256.
5. Security Considerations
The security considerations from [RFC5280], [RFC5480], [RFC5652],
[RFC5753], [I-D.turner-encryptedkeypackagecontenttype-algs], and
[I-D.mcgrew-fundamental-ecc] apply.
6. IANA Considerations
None. Please remove this section prior to publication as an RFC.
7. References
7.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
Housley, R., and W. Polk, "Internet X.509 Public Key
Infrastructure Certificate and Certificate Revocation
List (CRL) Profile", RFC 5280, May 2008.
[RFC5480] Turner, S., Brown, D., Yiu, K., Housley, R., and T. Polk,
"Elliptic Curve Cryptography Subject Public Key
Information", RFC 5480, March 2009.
[RFC5652] Housley, R., "Cryptographic Message Syntax (CMS)", RFC
5652, September 2009.
[RFC5753] Turner, S., and D. Brown, "Use of Elliptic Curve
Cryptography (ECC) Algorithms in Cryptographic Message
Syntax (CMS)", RFC 5753, January 2010.
[I-D.mcgrew-fundamental-ecc] McGrew, D., Igoe, E., and M. Salter,
"Fundamental Elliptic Curve Cryptography Algorithms",
draft-mcgrew-fundamental-ecc-03.txt, work-in-progress.
[I-D.turner-encryptedkeypackagecontenttype] Turner, S., and R.
Housley, "Cryptographic Message Syntax (CMS) Encrypted
Key Package Content Type", draft-turner-
encryptedkeypackagecontenttype-02.txt, work-in-progress.
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[I-D.turner-encryptedkeypackagecontenttype-algs] Turner, S.,
"Algorithms for Cryptographic Message Syntax (CMS)
Encrypted Key Package Content Type", draft-turner-
encryptedkeypackagecontenttype-algs-02.txt, work-in-
progress.
7.2. Informative References
None.
Authors' Addresses
Sean Turner
IECA, Inc.
3057 Nutley Street, Suite 106
Fairfax, VA 22031
USA
EMail: turners@ieca.com
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