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RFC 8080, "Edwards-Curve Digital Security Algorithm (EdDSA) for DNSSEC", February 2017

Source of RFC: curdle (sec)

Errata ID: 4935

Status: Verified
Type: Technical

Reported By: Tom Thorogood
Date Reported: 2017-02-16
Verifier Name: Stephen Farrell
Date Verified: 2017-02-16

Section 6 says:

6.  Examples

6.1.  Ed25519 Examples

Private-key-format: v1.2
Algorithm: 15 (ED25519)
PrivateKey: ODIyNjAzODQ2MjgwODAxMjI2NDUxOTAyMDQxNDIyNjI=

example.com. 3600 IN DNSKEY 257 3 15 (
             l02Woi0iS8Aa25FQkUd9RMzZHJpBoRQwAQEX1SxZJA4= )

example.com. 3600 IN DS 3613 15 2 (
             3aa5ab37efce57f737fc1627013fee07bdf241bd10f3b1964ab55c78e79
             a304b )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 3 3600 (
             1440021600 1438207200 3613 example.com. (
             Edk+IB9KNNWg0HAjm7FazXyrd5m3Rk8zNZbvNpAcM+eysqcUOMIjWoevFkj
             H5GaMWeG96GUVZu6ECKOQmemHDg== )



Sury & Edmonds               Standards Track                    [Page 3]

RFC 8080                    EdDSA for DNSSEC               February 2017


Private-key-format: v1.2
Algorithm: 15 (ED25519)
PrivateKey: DSSF3o0s0f+ElWzj9E/Osxw8hLpk55chkmx0LYN5WiY=

example.com. 3600 IN DNSKEY 257 3 15 (
             zPnZ/QwEe7S8C5SPz2OfS5RR40ATk2/rYnE9xHIEijs= )

example.com. 3600 IN DS 35217 15 2 (
             401781b934e392de492ec77ae2e15d70f6575a1c0bc59c5275c04ebe80c
             6614c )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 3 3600 (
             1440021600 1438207200 35217 example.com. (
             5LL2obmzdqjWI+Xto5eP5adXt/T5tMhasWvwcyW4L3SzfcRawOle9bodhC+
             oip9ayUGjY9T/rL4rN3bOuESGDA== )

6.2.  Ed448 Examples

Private-key-format: v1.2
Algorithm: 16 (ED448)
PrivateKey: xZ+5Cgm463xugtkY5B0Jx6erFTXp13rYegst0qRtNsOYnaVpMx0Z/c5EiA9x
            8wWbDDct/U3FhYWA

example.com. 3600 IN DNSKEY 257 3 16 (
             3kgROaDjrh0H2iuixWBrc8g2EpBBLCdGzHmn+G2MpTPhpj/OiBVHHSfPodx
             1FYYUcJKm1MDpJtIA )

example.com. 3600 IN DS 9713 16 2 (
             6ccf18d5bc5d7fc2fceb1d59d17321402f2aa8d368048db93dd811f5cb2
             b19c7 )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 3 3600 (
             1440021600 1438207200 9713 example.com. (
             Nmc0rgGKpr3GKYXcB1JmqqS4NYwhmechvJTqVzt3jR+Qy/lSLFoIk1L+9e3
             9GPL+5tVzDPN3f9kAwiu8KCuPPjtl227ayaCZtRKZuJax7n9NuYlZJIusX0
             SOIOKBGzG+yWYtz1/jjbzl5GGkWvREUCUA )











Sury & Edmonds               Standards Track                    [Page 4]

RFC 8080                    EdDSA for DNSSEC               February 2017


Private-key-format: v1.2
Algorithm: 16 (ED448)
PrivateKey: WEykD3ht3MHkU8iH4uVOLz8JLwtRBSqiBoM6fF72+Mrp/u5gjxuB1DV6NnPO
            2BlZdz4hdSTkOdOA

example.com. 3600 IN DNSKEY 257 3 16 (
             kkreGWoccSDmUBGAe7+zsbG6ZAFQp+syPmYUurBRQc3tDjeMCJcVMRDmgcN
             Lp5HlHAMy12VoISsA )

example.com. 3600 IN DS 38353 16 2 (
             645ff078b3568f5852b70cb60e8e696cc77b75bfaaffc118cf79cbda1ba
             28af4 )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 3 3600 (
             1440021600 1438207200 38353 example.com. (
             +JjANio/LIzp7osmMYE5XD3H/YES8kXs5Vb9H8MjPS8OAGZMD37+LsCIcjg
             5ivt0d4Om/UaqETEAsJjaYe56CEQP5lhRWuD2ivBqE0zfwJTyp4WqvpULbp
             vaukswvv/WNEFxzEYQEIm9+xDlXj4pMAMA )

It should say:

6.  Examples

6.1.  Ed25519 Examples

Private-key-format: v1.2
Algorithm: 15 (ED25519)
PrivateKey: ODIyNjAzODQ2MjgwODAxMjI2NDUxOTAyMDQxNDIyNjI=

example.com. 3600 IN DNSKEY 257 3 15 (
             l02Woi0iS8Aa25FQkUd9RMzZHJpBoRQwAQEX1SxZJA4= )

example.com. 3600 IN DS 3613 15 2 (
             3aa5ab37efce57f737fc1627013fee07bdf241bd10f3b1964ab55c78e79
             a304b )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 15 2 3600 (
             1440021600 1438207200 3613 example.com. (
             oL9krJun7xfBOIWcGHi7mag5/hdZrKWw15jPGrHpjQeRAvTdszaPD+QLs3f
             x8A4M3e23mRZ9VrbpMngwcrqNAg== )



Sury & Edmonds               Standards Track                    [Page 3]

RFC 8080                    EdDSA for DNSSEC               February 2017


Private-key-format: v1.2
Algorithm: 15 (ED25519)
PrivateKey: DSSF3o0s0f+ElWzj9E/Osxw8hLpk55chkmx0LYN5WiY=

example.com. 3600 IN DNSKEY 257 3 15 (
             zPnZ/QwEe7S8C5SPz2OfS5RR40ATk2/rYnE9xHIEijs= )

example.com. 3600 IN DS 35217 15 2 (
             401781b934e392de492ec77ae2e15d70f6575a1c0bc59c5275c04ebe80c
             6614c )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 15 2 3600 (
             1440021600 1438207200 35217 example.com. (
             zXQ0bkYgQTEFyfLyi9QoiY6D8ZdYo4wyUhVioYZXFdT410QPRITQSqJSnzQ
             oSm5poJ7gD7AQR0O7KuI5k2pcBg== )

6.2.  Ed448 Examples

Private-key-format: v1.2
Algorithm: 16 (ED448)
PrivateKey: xZ+5Cgm463xugtkY5B0Jx6erFTXp13rYegst0qRtNsOYnaVpMx0Z/c5EiA9x
            8wWbDDct/U3FhYWA

example.com. 3600 IN DNSKEY 257 3 16 (
             3kgROaDjrh0H2iuixWBrc8g2EpBBLCdGzHmn+G2MpTPhpj/OiBVHHSfPodx
             1FYYUcJKm1MDpJtIA )

example.com. 3600 IN DS 9713 16 2 (
             6ccf18d5bc5d7fc2fceb1d59d17321402f2aa8d368048db93dd811f5cb2
             b19c7 )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 16 2 3600 (
             1440021600 1438207200 9713 example.com. (
             3cPAHkmlnxcDHMyg7vFC34l0blBhuG1qpwLmjInI8w1CMB29FkEAIJUA0am
             xWndkmnBZ6SKiwZSAxGILn/NBtOXft0+Gj7FSvOKxE/07+4RQvE581N3Aj/
             JtIyaiYVdnYtyMWbSNyGEY2213WKsJlwEA )











Sury & Edmonds               Standards Track                    [Page 4]

RFC 8080                    EdDSA for DNSSEC               February 2017


Private-key-format: v1.2
Algorithm: 16 (ED448)
PrivateKey: WEykD3ht3MHkU8iH4uVOLz8JLwtRBSqiBoM6fF72+Mrp/u5gjxuB1DV6NnPO
            2BlZdz4hdSTkOdOA

example.com. 3600 IN DNSKEY 257 3 16 (
             kkreGWoccSDmUBGAe7+zsbG6ZAFQp+syPmYUurBRQc3tDjeMCJcVMRDmgcN
             Lp5HlHAMy12VoISsA )

example.com. 3600 IN DS 38353 16 2 (
             645ff078b3568f5852b70cb60e8e696cc77b75bfaaffc118cf79cbda1ba
             28af4 )

example.com. 3600 IN MX 10 mail.example.com.

example.com. 3600 IN RRSIG MX 16 2 3600 (
             1440021600 1438207200 38353 example.com. (
             E1/oLjSGIbmLny/4fcgM1z4oL6aqo+izT3urCyHyvEp4Sp8Syg1eI+lJ57C
             SnZqjJP41O/9l4m0AsQ4f7qI1gVnML8vWWiyW2KXhT9kuAICUSxv5OWbf81
             Rq7Yu60npabODB0QFPb/rkW3kUZmQ0YQUA )

Notes:

The script used to generate the examples (see https://gitlab.labs.nic.cz/labs/ietf/blob/master/dnskey.py) contains two errors that make the RRSIG records in the example section invalid.
1. The script fails to print the algorithm identifier (15 & 16, TBD1 & TBD2 in earlier drafts) for RRSIGs, and
2. the implementation of label counting includes the root zone as a label, giving an incorrect count of 3 rather than 2.

The first bug is more cosmetic but does result in unparsable RRSIG records, while the second bug causes invalid signatures to be produced.

With these two bugs corrected (and no other changes) the script produces valid examples which are included in the correction above. They have been successfully tested with an independent implementation of RFC 8080 based on https://github.com/miekg/dns & https://godoc.org/golang.org/x/crypto/ed25519 .

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