Keytool does not agree with RFC 8410

[Anders Rundgren]

Since the JDK bug report tool does not include "keytool" I posted this here.

Keytool for JDK 15 reports "Subject Public Key Algorithm: XDH key of unknown size" for a certificate  containing the following public key:

148:     SEQUENCE {
  150:       SEQUENCE {
  152:         OBJECT IDENTIFIER X25519 (1.3.101.110)
             }
  157:       BIT STRING, 32 bytes
       0000: a3 5e 94 ef bd d0 41 86 90 07 87 9e 80 d0 a5 76 '.^....A........v'
       0010: 0e a1 ba 82 19 2e c3 90 21 89 05 5a f6 d9 e6 50 '........!..Z...P'
           }

which seems to be aligned with: https://tools.ietf.org/html/rfc8410#section-10.2

You can verify this issue by importing the certificate in the RFC.

Anders