CkPython

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

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import sys
import chilkat

success = False

#  Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
#  BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
#  password, and the 3rd is an SshKey private key.

ssh = chilkat.CkSsh()

#  Connect to the SSH server.  Port 22 is the usual SSH port.
sshPort = 22
success = ssh.Connect("ssh.example.com",sshPort)
if (success == False):
    print(ssh.lastErrorText())
    sys.exit()

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
password = "mySshPassword"

#  Load the SSH private key.  LoadText reads the file's text, which is then imported.
privKey = chilkat.CkSshKey()
keyStr = privKey.loadText("qa_data/id_rsa")
if (privKey.get_LastMethodSuccess() == False):
    print(privKey.lastErrorText())
    sys.exit()

success = privKey.FromOpenSshPrivateKey(keyStr)
if (success == False):
    print(privKey.lastErrorText())
    sys.exit()

success = ssh.AuthenticatePwPk("mySshLogin",password,privKey)
if (success == False):
    print(ssh.lastErrorText())
    sys.exit()

print("Authenticated with password and private key.")

ssh.Disconnect()