HTT Consulting

Oak Park MI 48237 United States of America rgm@labs.htt-consult.com

kivinen@iki.fi

Sandelman Software Works

mcr+ietf@sandelman.ca https://www.sandelman.ca/

sec IPSECKEY EdDSA This document assigns a value for Edwards-Curve Digital Signature Algorithm (EdDSA) Public Keys to the "IPSECKEY Resource Record Parameters" 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 Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at .

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Table of Contents

• .  Introduction
• .  IPSECKEY Support for EdDSA
• .  IANA Considerations
  • .  Update to the IANA IPSECKEY Registry
    • .  Reformat the Algorithm Type Field Registry
    • .  Add to the Algorithm Type Field Registry
• .  Security Considerations
• .  References
  • .  Normative References
  • .  Informative References
• .  IPSECKEY EdDSA Example
• Acknowledgments
• Authors' Addresses

Introduction IPSECKEY is a resource record (RR) for the Domain Name System (DNS) that is used to store public keys for use in IP security (IPsec) systems. The IPSECKEY RR relies on the IPSECKEY "Algorithm Type Field" registry to enumerate the permissible formats for the public keys. This document adds support for Edwards-Curve Digital Security Algorithm (EdDSA) public keys in the format defined in to the IPSECKEY RR.

IPSECKEY Support for EdDSA When using the EdDSA public key in the IPSECKEY RR, the value 4 is used as an algorithm and the public key is formatted as specified in "Edwards-Curve Digital Security Algorithm (EdDSA) for DNSSEC" ().

Value	Description	Format Description	Reference
4	An EdDSA Public Key		This RFC

IANA Considerations

Update to the IANA IPSECKEY Registry

Reformat the Algorithm Type Field Registry Per this document, IANA has added the "Format Description" field to the "Algorithm Type Field" registry of the "IPSECKEY Resource Record Parameters" . In addition, IANA has updated the "Description" field in existing entries of that registry to explicitly state that they are for "Public" keys:

Value	Description	Format Description	Reference
0	No Public key is present
1	A DSA Public Key
2	An RSA Public Key
3	An ECDSA Public Key

IANA added a reference to this document to the "Algorithm Type Field" registry.

Add to the Algorithm Type Field Registry Further, IANA has made the following addition to the "Algorithm Type Field" registry within the "IPSECKEY Resource Record Parameters" :

Value	Description	Format Description	Reference
4	An EdDSA Public Key		This RFC

Security Considerations The security considerations discussed in apply. This document does not introduce any new security considerations.

References Normative References IANA This document describes how to specify Edwards-curve Digital Security Algorithm (EdDSA) keys and signatures in DNS Security (DNSSEC). It uses EdDSA with the choice of two curves: Ed25519 and Ed448. Informative References A standard method for storing US Government Digital Signature Algorithm keys and signatures in the Domain Name System is described which utilizes DNS KEY and SIG resource records. [STANDARDS-TRACK] This document describes how to produce RSA/SHA1 SIG resource records (RRs) in Section 3 and, so as to completely replace RFC 2537, describes how to produce RSA KEY RRs in Section 2. [STANDARDS-TRACK] This document describes a new resource record for the Domain Name System (DNS). This record may be used to store public keys for use in IP security (IPsec) systems. The record also includes provisions for indicating what system should be contacted when an IPsec tunnel is established with the entity in question. This record replaces the functionality of the sub-type #4 of the KEY Resource Record, which has been obsoleted by RFC 3445. [STANDARDS-TRACK] This document describes how to specify Elliptic Curve Digital Signature Algorithm (DSA) keys and signatures in DNS Security (DNSSEC). It lists curves of different sizes and uses the SHA-2 family of hashes for signatures. [STANDARDS-TRACK] This document specifies a resource record (RR) for the Domain Name System (DNS) and how to use it with the Host Identity Protocol (HIP). This RR allows a HIP node to store in the DNS its Host Identity (HI), the public component of the node public-private key pair; its Host Identity Tag (HIT), a truncated hash of its public key (PK); and the domain names of its rendezvous servers (RVSs). This document obsoletes RFC 5205.

IPSECKEY EdDSA Example The following is an example of an IPSECKEY RR with no gateway, and an EdDSA public key. It uses the IPSECKEY presentation format which is base64. foo.example.com. IN IPSECKEY ( 10 0 4 . 3WTXgUvpn1RlCXnm80gGY2LZ/ErUUEZtZ33IDi8yfhM= ) The associated EdDSA private key (in hex) is as follows: c7be71a45cbf87785f639dc4fd1c82637c21b5e02488939976ece32b9268d0b7

Acknowledgments Thanks to the Security Area Director, , for his initial review. Also, thanks to Security Area Director, , for his final reviews and document shepherding.

Authors' Addresses HTT Consulting

Oak Park MI 48237 United States of America rgm@labs.htt-consult.com

kivinen@iki.fi

Sandelman Software Works

mcr+ietf@sandelman.ca https://www.sandelman.ca/