Message Authorizing Email Header Field and Its Use for the Draft and Release Procedure
RFC 7912
Document | Type |
RFC - Informational
(June 2016; No errata)
Was draft-melnikov-mmhs-authorizing-users (individual)
|
|
---|---|---|---|
Author | Alexey Melnikov | ||
Last updated | 2016-06-21 | ||
Stream | ISE | ||
Formats | plain text html pdf htmlized bibtex | ||
IETF conflict review | conflict-review-melnikov-mmhs-authorizing-users | ||
Stream | ISE state | Published RFC | |
Consensus Boilerplate | Unknown | ||
Document shepherd | Adrian Farrel | ||
Shepherd write-up | Show (last changed 2016-03-11) | ||
IESG | IESG state | RFC 7912 (Informational) | |
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | "Nevil Brownlee" <rfc-ise@rfc-editor.org> | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Independent Submission A. Melnikov Request for Comments: 7912 Isode Ltd Category: Informational June 2016 ISSN: 2070-1721 Message Authorizing Email Header Field and Its Use for the Draft and Release Procedure Abstract This document describes a procedure for when a Military Message Handling System (MMHS) message is composed by one user and is only released to the mail transfer system when one or more Authorizing Users authorize release of the message by adding the MMHS-Authorizing-Users header field. The resulting message can be optionally signed by the sender and/or reviewer, allowing recipients to verify both the original signature (if any) and the review signatures. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This is a contribution to the RFC Series, independently of any other RFC stream. The RFC Editor has chosen to publish this document at its discretion and makes no statement about its value for implementation or deployment. Documents approved for publication by the RFC Editor are not a candidate for any level of Internet Standard; see Section 2 of RFC 7841. 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/rfc7912. Copyright Notice Copyright (c) 2016 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. Melnikov Informational [Page 1] RFC 7912 Message Authorizing Header Field June 2016 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions Used in This Document . . . . . . . . . . . . . . 3 3. Draft and Release Procedure . . . . . . . . . . . . . . . . . 3 3.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 3.2. Handling of Initial Message Submission by the MSA . . . . 3 3.3. Review by Authorizing User(s) . . . . . . . . . . . . . . 4 3.3.1. Processing of Encrypted Messages . . . . . . . . . . 5 3.3.2. Authorizing S/MIME Signatures . . . . . . . . . . . . 5 3.4. Role of Other Messaging Agents at the Sender's Domain . . 6 3.4.1. MDA at the Sender's Domain . . . . . . . . . . . . . 6 3.4.2. Border MTA at the Sender's Domain . . . . . . . . . . 6 4. MMHS-Authorizing-Users Header Field . . . . . . . . . . . . . 6 5. Updated MIXER Mapping . . . . . . . . . . . . . . . . . . . . 7 5.1. Mapping from RFC 5322/MIME to X.400 . . . . . . . . . . . 7 5.2. Mapping from X.400 to RFC 5322/MIME . . . . . . . . . . . 7 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8 7. Security Considerations . . . . . . . . . . . . . . . . . . . 8 7.1. Forged Header Fields . . . . . . . . . . . . . . . . . . 9 7.2. Intentionally Malformed Header Fields . . . . . . . . . . 9 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 9 8.1. Normative References . . . . . . . . . . . . . . . . . . 9 8.2. Informative References . . . . . . . . . . . . . . . . . 10 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 11 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Introduction In some secure environments, email messages can't be released to the Message Transfer System (MTS); thus, they can't be delivered to recipients unless they are authorized by one or more Authorizing Users (e.g., Releasing Officers or Release Authorities). This document describes how this mechanism can be realized by an additional Internet Email [RFC5322] header field and optionally protected using S/MIME [RFC5750] [RFC5751] or DomainKeys Identified Mail (DKIM) [RFC6376]. This document describes a procedure for how an email message composed by one user can be released to the MTS when one or more Authorizing Users authorize and optionally countersign the message. The MMHS- Authorizing-Users header field (see Section 4) communicates which user(s) authorized the message. If S/MIME signed, the resulting message allows recipients to verify both the original (if any) and counter signatures. The original S/MIME signature generated by the sender (if any) is unaffected by additional S/MIME review signatures.Show full document text