ed25519 keys don't work

[35609902357]

If I generate ssh-keygen -t rsa and add the key to the server everything works as expected.
If I generate ssh-keygen -t ed25519 and add the key to the server the key is not accepted.
I tried to use dropbearconvert openssh dropbear id_ed25519 id_ed25519-dropbear, but the output file seems broken.
How can I diagnose this issue?

[mkj]

dropbearconvert can't handle OpenSSH new key format, only the older style keys from ssh-keygen -m PEM, which start with -----BEGIN RSA PRIVATE KEY----- etc. It should print an error message that it can't convert.

ssh-keygen can't write ed25519 keys in PEM format. So you'll have to use dropbearkey to create the key. At some point I'll implement conversion for the newer format, or patches accepted.

The other ecdsa format keys should work OK for conversion, they have similar performance to ed25519, though not quite as fast.

[mkj]

OpenSSH new key format support is fixed in 81e3977 (and previous commits)

ed25519 support should have worked previously but there was a bug in it.