What kind of algo is supported by dropbear in 19.07?

Installing and Using OpenWrt
1

Besides ssh-dss public key in authorized_keys, what other keys are supported? ssh-ed25519 doesn't seem to work.

3

No not keygen, not that.

Here are the messages:

Fri Oct 22 21:12:03 2021 authpriv.warn dropbear[32339]: Pubkey auth attempt with **unknown algo** for 'root' from x
Fri Oct 22 21:12:03 2021 authpriv.warn dropbear[32339]: Pubkey auth attempt with **unknown algo** for 'root' from x
Fri Oct 22 21:12:05 2021 authpriv.notice dropbear[32339]: Password auth succeeded for 'root' from x
4

You need to generate an RSA key pair.
Then set up Dropbear key-based authentication.
It must work when configured properly.

5

Yes "-t rsa" works. I was asking what else can work. "-t ed25519" for example doesn't work.

6

You will have to go to 21.x for ed25519, but !SMALL-FLASH

7

So, "-t rsa" only for dropbear in 19.07?

8
9

I have openssh 8.8 and -t ecdsa gives me a ecdsa-sha2-nistp256 pair of keys which dropbear still doesn't support. Anyway I use this workaround for now in my ~/.ssh/config:

HostKeyAlgorithms=+ssh-rsa
PubkeyAcceptedAlgorithms=+ssh-rsa
10

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