I have an Ed25519 key pair that I use to successfully log in to Router A via SSH (the public key is imported there).
Now I want to execute commands from Router B on Router A using the same key pair. However, I can't import the private key onto Router B. I keep getting the message: "wrong format or passphrase?"
A key pair (ed25519) created on Mikrotik does work between Mikrotik routers, but I can't use the private key on the MAC to connect ... very strange, isn't it?
If I am not mistaken, it is currently not possible to import OpenSSH ED2559 keys to MikroTik routers. The reason seems to be that there es no common exchange format that allows you to transfer the keys that you use with OpenSSH so that MikroTik can read them. It will work with ECDSA keys or RSA keys.
You can create these keys on a MikroTik router and connect to another MikroTik router. I found that to be weird limitation and would be happy to know the solution for this as well (if there is any).
The current approach: a key pair (generated by ssh-keygen on the Mac) for accessing the router from the Mac and another key pair (generated on the Mikrotik router) for accessing one router from the other.
P.S.: The private key generated by Mikrotik cannot be opened with any tool, such as PuTTYgen or similar...
Can this be useful?