This still appears to be an issue with Jenkins 2.73.3 using ssh plugin version 2.5. ed25519 keys do not work and there is an error stating "
Can't connect to server" when attempting to add a new ssh site in the Jenkins global configuration. See the attached screenshot for refrence.
Jenkins logs also show an error as follows.
ERROR: Failed to authenticate with public key
[[8mha:////4IzJAEUbJVXO0x7sOCoWD5u1OPX6pWxoNK4vpa0nY2K0AAAAVx+LCAAAAAAAAP9b85aBtbiIQSmjNKU4P08vOT+vOD8nVc8DzHWtSE4tKMnMz/PLL0mV3NWzufebKBsTA0NFEYMUmgZnCA1SyAABjCCFBQC2xNaiYAAAAA==[[0mcom.jcraft.jsch.JSchException: invalid privatekey: [B@3802c10b
The key is valid and works when using the ssh client on our jenkins server.
This would be great to have updated!!
Can you see to it?