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<pre>Internet Engineering Task Force (IETF) S. Rose
Request for Comments: 6725 NIST
Category: Standards Track August 2012
ISSN: 2070-1721
<span class="h1">DNS Security (DNSSEC) DNSKEY Algorithm IANA Registry Updates</span>
Abstract
The DNS Security Extensions (DNSSEC) require the use of cryptographic
algorithm suites for generating digital signatures over DNS data.
The algorithms specified for use with DNSSEC are reflected in an
IANA-maintained registry. This document presents a set of changes
for some entries of the registry.
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 <a href="./rfc5741#section-2">Section 2 of RFC 5741</a>.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
<a href="http://www.rfc-editor.org/info/rfc6725">http://www.rfc-editor.org/info/rfc6725</a>.
Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to <a href="https://www.rfc-editor.org/bcp/bcp78">BCP 78</a> and the IETF Trust's Legal
Provisions Relating to IETF Documents
(<a href="http://trustee.ietf.org/license-info">http://trustee.ietf.org/license-info</a>) 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.
<span class="grey">Rose Standards Track [Page 1]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-2" ></span>
<span class="grey"><a href="./rfc6725">RFC 6725</a> IANA Registry Update August 2012</span>
Table of Contents
<a href="#section-1">1</a>. Introduction ....................................................<a href="#page-2">2</a>
<a href="#section-2">2</a>. The DNS Security Algorithm Numbers Sub-Registry .................<a href="#page-2">2</a>
<a href="#section-2.1">2.1</a>. Updates and Additions ......................................<a href="#page-2">2</a>
<a href="#section-2.2">2.2</a>. DNS Security Algorithm Numbers Sub-Registry Table ..........<a href="#page-3">3</a>
<a href="#section-3">3</a>. IANA Considerations .............................................<a href="#page-4">4</a>
<a href="#section-4">4</a>. Security Considerations .........................................<a href="#page-4">4</a>
<a href="#section-5">5</a>. Informative References ..........................................<a href="#page-4">4</a>
<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>. Introduction</span>
The Domain Name System (DNS) Security Extensions (DNSSEC, defined by
[<a href="./rfc4033" title=""DNS Security Introduction and Requirements"">RFC4033</a>], [<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>], [<a href="./rfc4035" title=""Protocol Modifications for the DNS Security Extensions"">RFC4035</a>], [<a href="./rfc4509" title=""Use of SHA-256 in DNSSEC Delegation Signer (DS) Resource Records (RRs)"">RFC4509</a>], [<a href="./rfc5155" title=""DNS Security (DNSSEC) Hashed Authenticated Denial of Existence"">RFC5155</a>], and [<a href="./rfc5702" title=""Use of SHA-2 Algorithms with RSA in DNSKEY and RRSIG Resource Records for DNSSEC"">RFC5702</a>])
use digital signatures over DNS data to provide source authentication
and integrity protection. DNSSEC uses an IANA registry to list codes
for digital signature algorithms (consisting of an asymmetric
cryptographic algorithm and a one-way hash function).
This document updates a set of entries in the IANA registry titled
"DNS Security (DNSSEC) Algorithm Numbers". These updated entries are
given in <a href="#section-2.2">Section 2.2</a> below. This list includes changes to selected
entries originally set aside for future algorithm specification that
did not occur. These three entries are changed to "Reserved" to
avoid potential conflicts with older implementations. This document
also brings the list of references for entries up to date.
There are auxiliary sub-registries related to the DNS Security
(DNSSEC) Algorithm Numbers registry that deal with various Diffie-
Hellman parameters used with DNSSEC. These registry tables are not
altered by this document.
<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>. The DNS Security Algorithm Numbers Sub-Registry</span>
The DNS Security Algorithm Numbers sub-registry (part of the Domain
Name System Security (DNSSEC) Algorithm Numbers registry) contains a
set of entries that contain errors. There are additional differences
to entries that are described in <a href="#section-2.1">Section 2.1</a>, and the complete list
of changed registry entries is in <a href="#section-2.2">Section 2.2</a>.
<span class="h3"><a class="selflink" id="section-2.1" href="#section-2.1">2.1</a>. Updates and Additions</span>
This document updates three entries in the Domain Name System
Security (DNSSEC) Algorithm Numbers registry:
The description for assignment number 4 is changed to "Reserved".
The description for assignment number 9 is changed to "Reserved".
<span class="grey">Rose Standards Track [Page 2]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-3" ></span>
<span class="grey"><a href="./rfc6725">RFC 6725</a> IANA Registry Update August 2012</span>
The description for assignment number 11 is changed to "Reserved".
The above entries are changed to "Reserved" because they were
placeholders for algorithms that were not fully specified for use
with DNSSEC. Older implementations may still have these algorithm
codes assigned, so these codes are reserved to prevent potential
incompatibilities.
<span class="h3"><a class="selflink" id="section-2.2" href="#section-2.2">2.2</a>. DNS Security Algorithm Numbers Sub-Registry Table</span>
The list of DNS Security Algorithm Numbers sub-registry entry changes
is given below. All other existing entries in the sub-registry table
are unchanged by this document and are not shown. The other two
sub-registries in the Domain Name System Security (DNSSEC) Algorithm
Numbers registry (DNS KEY Record Diffie-Hellman Prime Lengths and DNS
KEY Record Diffie-Hellman Well-Known Prime/Generator Pairs) are not
changed in any way by this document.
Zone Trans.
Number Description Mnemonic Signing Sec. Reference
------ ----------- -------- ------- --------- ---------
0 Reserved [<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>],
[<a href="./rfc4398" title=""Storing Certificates in the Domain Name System (DNS)"">RFC4398</a>]
1 RSA/MD5 RSAMD5 N Y [<a href="./rfc3110" title=""RSA/SHA-1 SIGs and RSA KEYs in the Domain Name System (DNS)"">RFC3110</a>],
(deprecated; [<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>]
see 5)
4 Reserved [<a href="./rfc6725">RFC6725</a>]
5 RSA/SHA-1 RSASHA1 Y Y [<a href="./rfc3110" title=""RSA/SHA-1 SIGs and RSA KEYs in the Domain Name System (DNS)"">RFC3110</a>],
[<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>]
9 Reserved [<a href="./rfc6725">RFC6725</a>]
11 Reserved [<a href="./rfc6725">RFC6725</a>]
15-122 Unassigned
123-251 Reserved [<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>],
[<a href="./rfc6014" title=""Cryptographic Algorithm Identifier Allocation for DNSSEC"">RFC6014</a>]
253 private PRIVATEDNS Y Y [<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>]
algorithm
254 private PRIVATEOID Y Y [<a href="./rfc4034" title=""Resource Records for the DNS Security Extensions"">RFC4034</a>]
algorithm OID
<span class="grey">Rose Standards Track [Page 3]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-4" ></span>
<span class="grey"><a href="./rfc6725">RFC 6725</a> IANA Registry Update August 2012</span>
<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>. IANA Considerations</span>
This document updates a set of DNS Security Algorithm Numbers
sub-registry entries as given in <a href="#section-2.2">Section 2.2</a>. The changes include
moving three registry entries to "Reserved" and updating the
reference list for entries.
<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>. Security Considerations</span>
This document updates the Domain Name System Security (DNSSEC)
Algorithm Numbers registry. It is not meant to be a discussion on
algorithm superiority. No new security considerations are raised in
this document.
<span class="h2"><a class="selflink" id="section-5" href="#section-5">5</a>. Informative References</span>
[<a id="ref-RFC3110">RFC3110</a>] Eastlake, D., "RSA/SHA-1 SIGs and RSA KEYs in the Domain
Name System (DNS)", <a href="./rfc3110">RFC 3110</a>, May 2001.
[<a id="ref-RFC4033">RFC4033</a>] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "DNS Security Introduction and Requirements",
<a href="./rfc4033">RFC 4033</a>, March 2005.
[<a id="ref-RFC4034">RFC4034</a>] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Resource Records for the DNS Security Extensions",
<a href="./rfc4034">RFC 4034</a>, March 2005.
[<a id="ref-RFC4035">RFC4035</a>] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Protocol Modifications for the DNS Security
Extensions", <a href="./rfc4035">RFC 4035</a>, March 2005.
[<a id="ref-RFC4398">RFC4398</a>] Josefsson, S., "Storing Certificates in the Domain Name
System (DNS)", <a href="./rfc4398">RFC 4398</a>, March 2006.
[<a id="ref-RFC4509">RFC4509</a>] Hardaker, W., "Use of SHA-256 in DNSSEC Delegation Signer
(DS) Resource Records (RRs)", <a href="./rfc4509">RFC 4509</a>, May 2006.
[<a id="ref-RFC5155">RFC5155</a>] Laurie, B., Sisson, G., Arends, R., and D. Blacka, "DNS
Security (DNSSEC) Hashed Authenticated Denial of
Existence", <a href="./rfc5155">RFC 5155</a>, March 2008.
[<a id="ref-RFC5702">RFC5702</a>] Jansen, J., "Use of SHA-2 Algorithms with RSA in DNSKEY
and RRSIG Resource Records for DNSSEC", <a href="./rfc5702">RFC 5702</a>,
October 2009.
[<a id="ref-RFC6014">RFC6014</a>] Hoffman, P., "Cryptographic Algorithm Identifier
Allocation for DNSSEC", <a href="./rfc6014">RFC 6014</a>, November 2010.
<span class="grey">Rose Standards Track [Page 4]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-5" ></span>
<span class="grey"><a href="./rfc6725">RFC 6725</a> IANA Registry Update August 2012</span>
Author's Address
Scott Rose
NIST
100 Bureau Dr.
Gaithersburg, MD 20899
USA
Phone: +1-301-975-8439
EMail: scottr.nist@gmail.com
Rose Standards Track [Page 5]
</pre>
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