Signed Syslog Messages
RFC 5848
Internet Engineering Task Force (IETF) J. Kelsey
Request for Comments: 5848 NIST
Category: Standards Track J. Callas
ISSN: 2070-1721 PGP Corporation
A. Clemm
Cisco Systems
May 2010
Signed Syslog Messages
Abstract
This document describes a mechanism to add origin authentication,
message integrity, replay resistance, message sequencing, and
detection of missing messages to the transmitted syslog messages.
This specification is intended to be used in conjunction with the
work defined in RFC 5424, "The Syslog Protocol".
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/rfc5848.
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
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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.
Kelsey, et al. Standards Track [Page 1]
RFC 5848 Signed Syslog Messages May 2010
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions Used in This Document . . . . . . . . . . . . . . 5
3. Syslog Message Format . . . . . . . . . . . . . . . . . . . . 5
4. Signature Blocks . . . . . . . . . . . . . . . . . . . . . . . 6
4.1. Syslog Messages Containing a Signature Block . . . . . . . 7
4.2. Signature Block Format and Fields . . . . . . . . . . . . 7
4.2.1. Version . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.2. Reboot Session ID . . . . . . . . . . . . . . . . . . 10
4.2.3. Signature Group and Signature Priority . . . . . . . . 10
4.2.4. Global Block Counter . . . . . . . . . . . . . . . . . 13
4.2.5. First Message Number . . . . . . . . . . . . . . . . . 13
4.2.6. Count . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2.7. Hash Block . . . . . . . . . . . . . . . . . . . . . . 14
4.2.8. Signature . . . . . . . . . . . . . . . . . . . . . . 14
4.2.9. Example . . . . . . . . . . . . . . . . . . . . . . . 15
5. Payload and Certificate Blocks . . . . . . . . . . . . . . . . 15
5.1. Preliminaries: Key Management and Distribution Issues . . 15
5.2. Payload Block . . . . . . . . . . . . . . . . . . . . . . 16
5.2.1. Block Format and Fields . . . . . . . . . . . . . . . 16
5.2.2. Signer Authentication and Authorization . . . . . . . 18
5.3. Certificate Block . . . . . . . . . . . . . . . . . . . . 19
5.3.1. Syslog Messages Containing a Certificate Block . . . . 19
5.3.2. Certificate Block Format and Fields . . . . . . . . . 20
6. Redundancy and Flexibility . . . . . . . . . . . . . . . . . . 24
6.1. Configuration Parameters . . . . . . . . . . . . . . . . . 24
6.1.1. Configuration Parameters for Certificate Blocks . . . 24
6.1.2. Configuration Parameters for Signature Blocks . . . . 26
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