RFC 3370 (rfc3370) - Page 2 of 24
Cryptographic Message Syntax (CMS) Algorithms
Alternative Format: Original Text Document
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 algorithms with the CMS are likely to be specified in separate documents. 1.2 Terminology In this document, the key words MUST, MUST NOT, REQUIRED, SHOULD, SHOULD NOT, RECOMMENDED, and MAY are to be interpreted as described in [STDWORDS]. Housley Standards Track
