Question

I want use paramiko to ssh2 to a remote host by public-key authentication, I setup the keys like these steps:

On local:

    Local> ssh-keygen
    Generating 1024-bit dsa key pair
    9 o.oOo..oOo.o
    Key generated.
    Passphrase :
    Again :
    Private key saved to /home/local/.ssh2/id_dsa_1024_a
    Public key saved to /home/local/.ssh2/id_dsa_1024_a.pub

    Local> cd ~/.ssh2
    Local> echo "IdKey id_dsa_1024_a" > identification
    Local> scp id_dsa_1024.pub remote@remote-host:~/.ssh2/local.pub

On remote:

    Remote> ssh-keygen
    ...omit...
    Remote> cd ~/.ssh2
    Remote> echo "Key local.pub" > authorization

After things above, I can just use ssh remote@remote-host to login.

However,I failed to use python’s paramiko module to login remote-host:

    conn = paramiko.SSHClient()
    conn.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    conn.connect(remote-host, 22, username=remote,password='')

Alway error: Authentication failed.

I’m so confused. 🙁

Answer 1

Have you tried setting the key_filename option when connecting? I’m not sure that paramiko will automatically look at your private key in ~/.ssh like the SSH CLI client does.

paramiko documentation