Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification
RFC 5751
Document | Type |
RFC - Proposed Standard
(January 2010; Errata)
Obsoleted by RFC 8551
Obsoletes RFC 3851
|
|
---|---|---|---|
Authors | Sean Turner , Blake Ramsdell | ||
Last updated | 2020-01-21 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5751 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Tim Polk | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) B. Ramsdell Request for Comments: 5751 Brute Squad Labs Obsoletes: 3851 S. Turner Category: Standards Track IECA ISSN: 2070-1721 January 2010 Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification Abstract This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 3.2. S/MIME provides a consistent way to send and receive secure MIME data. Digital signatures provide authentication, message integrity, and non-repudiation with proof of origin. Encryption provides data confidentiality. Compression can be used to reduce data size. This document obsoletes RFC 3851. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5751. Ramsdell & Turner Standards Track [Page 1] RFC 5751 S/MIME 3.2 Message Specification January 2010 Copyright Notice Copyright (c) 2010 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 (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. 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. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Ramsdell & Turner Standards Track [Page 2] RFC 5751 S/MIME 3.2 Message Specification January 2010 Table of Contents 1. Introduction ....................................................4 1.1. Specification Overview .....................................4 1.2. Definitions ................................................5 1.3. Conventions Used in This Document ..........................6 1.4. Compatibility with Prior Practice of S/MIME ................7 1.5. Changes from S/MIME v3 to S/MIME v3.1 ......................7 1.6. Changes since S/MIME v3.1 ..................................7 2. CMS Options .....................................................9 2.1. DigestAlgorithmIdentifier ..................................9 2.2. SignatureAlgorithmIdentifier ...............................9 2.3. KeyEncryptionAlgorithmIdentifier ..........................10 2.4. General Syntax ............................................11 2.5. Attributes and the SignerInfo Type ........................12 2.6. SignerIdentifier SignerInfo Type ..........................16 2.7. ContentEncryptionAlgorithmIdentifier ......................16 3. Creating S/MIME Messages .......................................18 3.1. Preparing the MIME Entity for Signing, Enveloping, or Compressing ............................................19 3.2. The application/pkcs7-mime Media Type .....................23 3.3. Creating an Enveloped-Only Message ........................25 3.4. Creating a Signed-Only Message ............................26 3.5. Creating a Compressed-Only Message ........................30 3.6. Multiple Operations .......................................30 3.7. Creating a Certificate Management Message .................31Show full document text