How can I make ssh-rsa the chosen keypair algorithm?

Question

A user asks, when connecting to SFTPs and both client and server supports ssh-rsa and ssh-dss key-pair algorithms, the client (edtFTPj/PRO library) always chooses ssh-dss. Is there a configuration to make it choose ssh-rsa over ssh-dss when both are available? When choosing ssh-dss, the connection fails and the files are not transferred.

Answer 1

Yes, it does it by simple order, and by default ssh-dss is listed first. You can change the order in SSHFTPClient like this:

sshFTP.disableAllAlgorithms(SSHFTPAlgorithm.KEY_PAIR);
sshFTP.setAlgorithmEnabled(SSHFTPAlgorithm.KEY_RSA, true);
sshFTP.setAlgorithmEnabled(SSHFTPAlgorithm.KEY_DSA, true);

This puts them in the order ssh-rsa,ssh-dss.