I’m working on a setup where I am using Erlang’s SSH as a client and authenticating to a separate SSH server by using a
ed25519 SSH key (generated by
ssh-keygen -t ed25519).
However what I’m running into is that my key works on Erlang 24, but not on Erlang 25 (where working is defined as successfully logging into an SSH server using the key).
Looking at the release notes (OTP-17920 on this page, I see this note which is maybe related:
The representation of Edward curves (ed25519 and ed448) inside ssh had a temporary representation (ed_pri and ed_pub).
That is now changed to the public_key form. See the manual for more information.
But since this same key works when used via openssh, it seems like erlang’s SSH client should support it as well.
I’ve also found a note that RSA is deprecated on OTP 25, but I don’t think I’m using RSA (and as a side-note I’m unable to find any details about RSA being deprecated on OTP 25 in the release notes).