Use of SHA-2 Algorithms with RSA in DNSKEY and RRSIG Resource Records for DNSSEC
RFC 5702
| Document | Type |
RFC - Proposed Standard
(October 2009; No errata)
Updated by RFC 6944
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5702 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ralph Droms | ||
| Send notices to | (None) | ||
Network Working Group J. Jansen
Request for Comments: 5702 NLnet Labs
Category: Standards Track October 2009
Use of SHA-2 Algorithms with RSA in
DNSKEY and RRSIG Resource Records for DNSSEC
Abstract
This document describes how to produce RSA/SHA-256 and RSA/SHA-512
DNSKEY and RRSIG resource records for use in the Domain Name System
Security Extensions (RFC 4033, RFC 4034, and RFC 4035).
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) 2009 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 BSD License.
Jansen Standards Track [Page 1]
RFC 5702 DNSSEC RSA/SHA-2 October 2009
Table of Contents
1. Introduction ....................................................2
2. DNSKEY Resource Records .........................................3
2.1. RSA/SHA-256 DNSKEY Resource Records ........................3
2.2. RSA/SHA-512 DNSKEY Resource Records ........................3
3. RRSIG Resource Records ..........................................3
3.1. RSA/SHA-256 RRSIG Resource Records .........................4
3.2. RSA/SHA-512 RRSIG Resource Records .........................4
4. Deployment Considerations .......................................5
4.1. Key Sizes ..................................................5
4.2. Signature Sizes ............................................5
5. Implementation Considerations ...................................5
5.1. Support for SHA-2 Signatures ...............................5
5.2. Support for NSEC3 Denial of Existence ......................5
6. Examples ........................................................6
6.1. RSA/SHA-256 Key and Signature ..............................6
6.2. RSA/SHA-512 Key and Signature ..............................7
7. IANA Considerations .............................................8
8. Security Considerations .........................................8
8.1. SHA-1 versus SHA-2 Considerations for RRSIG
Resource Records ...........................................8
8.2. Signature Type Downgrade Attacks ...........................8
9. Acknowledgments .................................................9
10. References .....................................................9
10.1. Normative References ......................................9
10.2. Informative References ....................................9
1. Introduction
The Domain Name System (DNS) is the global, hierarchical distributed
database for Internet Naming. The DNS has been extended to use
cryptographic keys and digital signatures for the verification of the
authenticity and integrity of its data. [RFC4033], [RFC4034], and
[RFC4035] describe these DNS Security Extensions, called DNSSEC.
RFC 4034 describes how to store DNSKEY and RRSIG resource records,
and specifies a list of cryptographic algorithms to use. This
document extends that list with the algorithms RSA/SHA-256 and RSA/
SHA-512, and specifies how to store DNSKEY data and how to produce
RRSIG resource records with these hash algorithms.
Familiarity with DNSSEC, RSA, and the SHA-2 [FIPS.180-3.2008] family
of algorithms is assumed in this document.
Jansen Standards Track [Page 2]
RFC 5702 DNSSEC RSA/SHA-2 October 2009
To refer to both SHA-256 and SHA-512, this document will use the name
SHA-2. This is done to improve readability. When a part of text is
specific for either SHA-256 or SHA-512, their specific names are
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