Cryptographic Message Syntax (CMS) Algorithms
RFC 3370
| Document | Type |
RFC - Proposed Standard
(September 2002; Errata)
Updated by RFC 5754
|
|
|---|---|---|---|
| Last updated | 2013-03-02 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 3370 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Jeffrey Schiller | ||
| IESG note | Responsible: RFC Editor | ||
| Send notices to | <turners@ieca.com>, <blake@brutesquadlabs.com> | ||
Network Working Group R. Housley
Request for Comments: 3370 RSA Laboratories
Obsoletes: 2630, 3211 August 2002
Category: Standards Track
Cryptographic Message Syntax (CMS) Algorithms
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2002). All Rights Reserved.
Abstract
This document describes the conventions for using several
cryptographic algorithms with the Cryptographic Message Syntax (CMS).
The CMS is used to digitally sign, digest, authenticate, or encrypt
arbitrary message contents.
Table of Contents
1 Introduction ............................................... 2
1.1 Changes Since RFC 2630 ..................................... 2
1.2 Terminology ................................................ 2
2 Message Digest Algorithms .................................. 3
2.1 SHA-1 ...................................................... 3
2.2 MD5 ........................................................ 3
3 Signature Algorithms ....................................... 4
3.1 DSA ........................................................ 4
3.2 RSA ........................................................ 5
4 Key Management Algorithms .................................. 6
4.1 Key Agreement Algorithms ................................... 6
4.1.1 X9.42 Ephemeral-Static Diffie-Hellman ...................... 7
4.1.2 X9.42 Static-Static Diffie-Hellman ......................... 8
4.2 Key Transport Algorithms ................................... 9
4.2.1 RSA (PKCS #1 v1.5) ......................................... 10
4.3 Symmetric Key-Encryption Key Algorithms .................... 10
4.3.1 Triple-DES Key Wrap ........................................ 11
4.3.2 RC2 Key Wrap ............................................... 12
4.4 Key Derivation Algorithms .................................. 12
Housley Standards Track [Page 1]
RFC 3370 CMS Algorithms August 2002
4.4.1 PBKDF2 ..................................................... 13
5 Content Encryption Algorithms .............................. 13
5.1 Triple-DES CBC ............................................. 14
5.2 RC2 CBC .................................................... 14
6 Message Authentication Code (MAC) Algorithms ............... 15
6.1 HMAC with SHA-1 ............................................ 15
7 ASN.1 Module ............................................... 16
8 References ................................................. 18
9 Security Considerations .................................... 20
10 Acknowledgments ............................................ 22
11 Author's Address ........................................... 23
12 Full Copyright Statement ................................... 24
1 Introduction
The Cryptographic Message Syntax (CMS) [CMS] is used to digitally
sign, digest, authenticate, or encrypt arbitrary message contents.
This companion specification describes the use of common
cryptographic algorithms with the CMS. Implementations of the CMS
may support these algorithms; implementations of the CMS may also
support other algorithms as well. However, if an implementation
chooses to support one of the algorithms discussed in this document,
then the implementation MUST do so as described in this document.
The CMS values are generated using ASN.1 [X.208-88], using BER-
encoding [X.209-88]. Algorithm identifiers (which include ASN.1
object identifiers) identify cryptographic algorithms, and some
algorithms require additional parameters. When needed, parameters
are specified with an ASN.1 structure. The algorithm identifier for
each algorithm is specified, and when needed, the parameter structure
is specified. The fields in the CMS employed by each algorithm are
identified.
1.1 Changes Since RFC 2630
This document obsoletes section 12 of RFC 2630 [OLDCMS]. RFC 3369
[CMS] obsoletes the rest of RFC 2630. Separation of the protocol and
algorithm specifications allows each one to be updated without
impacting the other. However, the conventions for using additional
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