Unable to start using `--unsafe-passphrase`

[xrat]

Starting ssh-chat server w/o --unsafe-passphrase works, but as ssh-chat -i ssh-chat.key --unsafe-passphrase=secret it refuses to start w/ error

Passphrase authentication conflicts with existing KeyboardInteractive setup.

Versions

• Server version: v1.10 (linux_amd64 binary)
• Latest server version available: v1.10 (linux_amd64 binary)

To Reproduce

wget https://github.com/shazow/ssh-chat/releases/download/v1.10/ssh-chat-linux_amd64.tgz
tar xaf ssh-chat-linux_amd64.tgz
ssh-keygen -t rsa -N '' -f ./ssh-chat.key
ssh-chat/ssh-chat -i ssh-chat.key --unsafe-passphrase=secret

Result:

Passphrase authentication conflicts with existing KeyboardInteractive setup.

[shazow]

Need to change

ssh-chat/cmd/ssh-chat/cmd.go

Line 137 in 3848014

config.KeyboardInteractiveCallback = func(conn ssh.ConnMetadata, challenge ssh.KeyboardInteractiveChallenge) (*ssh.Permissions, error) {

to replace https://github.com/shazow/ssh-chat/blob/master/sshd/auth.go#L37 (and ideally include similar logic).