DNS Security (DNSSEC) DNSKEY Algorithm IANA Registry Updates
draft-srose-dnssec-registry-update-00

Abstract

The DNS Security Extensions (DNSSEC) requires 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 and presents a new registry table.

Status of this Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on May 21, 2012.

Copyright Notice

Copyright (c) 2011 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.

Table of Contents

• 1. Introduction
• 2. The DNS Security Algorithm Number Sub-registry
• 2.1. Updates and Additions
• 2.2. Domain Name System (DNS) Security Algorithm Number Registry Table
• 3. IANA Considerations
• 4. Security Considerations
• 5. References
• Author's Address

1. Introduction

The Domain Name System (DNS) Security Extensions (DNSSEC) [RFC4033], [RFC4034], [RFC4035], [RFC4509], [RFC5155], and [RFC5702] uses 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 a cryptographic algorithm and one-way hash function).

This document replaces the current IANA registry for Domain Name System Security (DNSSEC) Algorithm Numbers with a newly defined registry table. This new table (Section 2.2 below) contains a collection of changes to selected entries originally set aside for future algorithm specification that did not occur. These 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.

2. The DNS Security Algorithm Number Sub-registry

The DNS Security Algorithm Number sub-registry (part of the Domain Name System (DNS) Security Number registry) will be replaced with the table below. There are additional differences to entries that are described in sub-section 2.1 and the overall new registry table is in sub-section 2.2.

2.1. Updates and Additions

This document updates three entries in the Domain Name System Security (DNSSEC) Algorithm Registry. They are:

The description for assignment number 4 is changed to "Reserved".

The description for assignment number 9 is changed to "Reserved".

The description for assignment number 11 is changed to "Reserved".

The above values 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.

2.2. Domain Name System (DNS) Security Algorithm Number Registry Table

The Domain Name System (DNS) Security Algorithm Number registry is hereby specified as follows below.

                                            Trans-  
                                      Zone  action  
   Number  Description     Mnemonic   Sign  Sign     Reference
   ------  -----------     ------     ----  -----    ---------
     0      Reserved                                 [RFC4034]
 					             [RFC4398]
     1      RSA/MD5         RSAMD5     N      Y      [RFC3110]
                                                   
     2      Diffie-Hellman  DH         N      Y      [RFC2539]
     3      DSA/SHA-1       DSASHA1    Y      Y      [RFC2536]
     4      Reserved 
     5      RSA/SHA-1       RSASHA1    Y      Y      [RFC3110]
                                                   
     6      DSA-NSEC3-SHA1  DSA-NSEC3  Y      Y      [RFC5155]
                            -SHA1
     7      RSASHA1-NSEC3   RSASHA1-   Y      Y      [RFC5155]
            -SHA1           NSEC3-                 
                            SHA1
     8      RSA/SHA-256     RSASHA256  Y      *      [RFC5702]
                                              
     9      Reserved 
    10      RSA/SHA-512     RSASHA512  Y      *      [RFC5702]
                                              
    11      Reserved 
    12      GOST R          GOST-ECC   Y      *      [RFC5933]
            34.10-2001
   13-122   Unassigned
   123-251  Reserved				     [RFC6014]
   252      Reserved for    INDIRECT   N      N      [RFC4034]
            Indirect keys
    253     private         PRIVATE    Y      Y      [RFC4034]
            algorithm
    254     private         PRIVATEOID Y      Y      [RFC4034]
            algorithm OID
    255     Reserved                                 [RFC4034]

3. IANA Considerations

This document replaces the Domain Name System (DNS) Security Algorithm Numbers registry with new registry table is in Section 2.2. The changes include moving three registry entries to "Reserved" and updating the reference list for entries.

The original Domain Name System (DNS) Security Algorithm Number registry is available at http://www.iana.org/assignments/dns-sec-alg-numbers.

4. Security Considerations

This document replaces the Domain Name System (DNS) Security Algorithm Numbers registry with an updated table. It is not meant to be a discussion on algorithm superiority. No new security considerations are raised in this document.

5. References

Author's Address