DNS Security (DNSSEC) DNSKEY IANA Registry Algorithm Status Addition
draft-ietf-dnsext-dnssec-registry-fixes-00

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Abstract

The DNS Security Extensions (DNSSEC) has an IANA registry to allocate cryptographic algorithm suites for use in generating digital signatures over DNS data. Newly introduced cryptographic algorithms to DNSSEC mean implementors need to know which algorithms need to be implmented, which are optional, and which are obsolete. This document adds a column to the IANA registry table for Domain Name System Security (DNSSEC) Algorithm Numbers to list their status for use.

Requirements Language

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 (Bradner, S., “Key words for use in RFCs to Indicate Requirement Levels,” March 1997.) [RFC2119].

Table of Contents

1.  Introduction

2.  DNS Security Algorithm Number Subregisitry Fixes
    2.1.  Individual Domain Name System Security (DNSSEC) Algorithm Number Registry Entry Fixes
    2.2.  Domain Name System Security (DNSSEC) Algorithm Number Registry

3.  IANA Considerations

4.  Security Considerations

5.  References
    5.1.  Normative References
    5.2.  Informative References

1.  Introduction

The DNS Security Extensions (DNSSEC) [RFC4033] (Arends, R., Austein, R., Larson, M., Massey, D., and S. Rose, “DNS Security Introduction and Requirements,” March 2005.), [RFC4034] (Arends, R., Austein, R., Larson, M., Massey, D., and S. Rose, “Resource Records for the DNS Security Extensions,” March 2005.), and [RFC4035] (Arends, R., Austein, R., Larson, M., Massey, D., and S. Rose, “Protocol Modifications for the DNS Security Extensions,” March 2005.) uses digital signatures over DNS data to provide source authentication and integrity protection. DNSSEC uses an IANA registry to allocate codes for digital signature algorithm (consisting of a cryptographic algorithm and one-way hash function). Certain digital signature algorithms are considered MANDATORY to implement for interoperability while others are listed as OPTIONAL or OBSOLETE.

Other DNSSEC documents have added new algorithms or changed the status of algorithms in the registry. However, without reading all the documents, implementors must read through all the documents to discover which algorithms are MANDATORY to implement and which are OPTIONAL or obsolete.

This document requests a column to be added to the IANA registry for Domain Name System Security (DNSSEC) Algorithm Numbers. This column will list the current status of each digital signature algorithm in the registry.

2.  DNS Security Algorithm Number Subregisitry Fixes

The DNS Security Algorithm Number subregistry (part of the Domain Name System (DNS) Security Number registry) will be modified to include a new column. This column will contain the current implementation status of the given algorithm. This status . This document does not make any changes to any other column in the registry table.

There are additional fixes to entries that are described in sub-section 2.1. The overall new registry table is in sub-section 2.2.

2.1.  Individual Domain Name System Security (DNSSEC) Algorithm Number Registry Entry Fixes

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

The description for allocation number 8 is changed to "Reserved until 2020".

The description for allocation number 9 is changed to "Reserved until 2020".

The description for allocation number 11 is changed to "Reserved until 2020".

2.2.  Domain Name System Security (DNSSEC) Algorithm Number Registry

As of the current time, the DNS Security Algorithm Number subregistry would look like the following:

	                          Zone  Trans
Number  Description      Mnem.    Sign  Sign     Status       Reference
------  -----------     ------    ----  -----  ------------   ---------
  0	 Reserved	                                      [RFC4398]
  1      RSA/MD5         RSAMD5     N     Y     OBSOLETE      [RFC4034],
						              [RFC2537]
  2      Diffie-Hellman   DH        N     Y     OPTOINAL      [RFC2539]
  3      DSA/SHA-1       DSASHA1    Y     Y     OPTIONAL      [RFC3755],
							      [RFC2536],
  							      FIPS 186,
							      FIPS 180-1
  4      Reserved until   ECC
         2020
  5      RSA/SHA-1	 RSASHA1    Y     Y    MANDATORY      [RFC3755],
                                                              [RFC3110]
  6	 DSA-NSEC3-SHA1  DSA-NSEC3  Y     Y    OPTIONAL	      [RFC5155]
		         -SHA1
  7      RSASHA1-NSEC3   RSASHA1-   Y     Y    OPTIONAL	      [RFC5155]
	 -SHA1           NSEC3-
		         SHA1
  8	 RSA/SHA-256     RSASHA256  Y     *    OPTIONAL       RFC-ietf-
                                                         dnsext-dnssec-
							 rsasha256-14
  9	 Reserved until
         2020
 10      RSA/SHA-512     RSASHA512  Y     *    OPTIONAL       RFC-ietf-
                                                         dnsext-dnssec-
						         rsasha256-14
 11      Reserved until
         2020
12-251   Unassigned
 252	 Reserved for    INDIRECT   N     N    OPTIONAL	     [RFC4034]
	 Indirect keys
 253	 private algo-   PRIVATE    Y     Y    OPTIONAL	     [RFC3755],
         domain name                                         [RFC2535]

 254     private algo-   PRIVATEOID Y     Y    OPTIONAL	     [RFC3755],
         OID                                                 [RFC2535]
 255     Reserved

Newly allocated algorithms will need to state their intended status in their specification. Any changes to a previously allocated algorithm's status MUST be done by a standards track document.

3.  IANA Considerations

This document consists entirely of DNS IANA Considerations and includes the following changes detailed in Section 2.1:

The description of allocation 8 is changed from "Reserved for ECC" to "Reserved until 2020".

The description of allocation 9 is changed from "Unassigned" to "Reserved until 2020".

The description of allocation 11 is changed from "Unassigned" to "Reserved until 2020".

The new table is in Section 2.2. The Domain Name System (DNS) Security Algorithm Number registry is available at http://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml.

4.  Security Considerations

This document seeks to add a column to an existing IANA registry. It is not meant to be a discussion on algorithm superiority. No new security considerations are raised in this document.

5.  References

5.1. Normative References

5.2. Informative References

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