Chilkat2-Python

SSH Tunnel Authenticate with a Password

Demonstrates the Chilkat SshTunnel.AuthenticatePw method, which authenticates the SSH connection with a login name and password. The first argument is the login and the second is the password. Connect first, and call BeginAccepting afterward.

Background: Password authentication is the simplest option, but the password is a secret and should never be a hard-coded literal — obtain it from an interactive prompt, an environment variable, or a secrets vault. Public-key authentication is generally preferred for the unattended, long-running services that tunnels often are.

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import sys
import chilkat2

success = False

# Demonstrates the SshTunnel.AuthenticatePw method, which authenticates the SSH connection with
# a login name and password.  The 1st argument is the login and the 2nd is the password.

tunnel = chilkat2.SshTunnel()

# The tunnel forwards accepted local connections to this destination through the SSH server.
tunnel.DestHostname = "db.internal.example.com"
tunnel.DestPort = 5432

# Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
# does not authenticate yet.
sshPort = 22
success = tunnel.Connect("ssh.example.com",sshPort)
if (success == False):
    print(tunnel.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"

success = tunnel.AuthenticatePw("mySshLogin",password)
if (success == False):
    print(tunnel.LastErrorText)
    sys.exit()

print("Authenticated.")

# After authenticating, call BeginAccepting to start listening for local connections to forward.

waitForThreadExit = True
success = tunnel.CloseTunnel(waitForThreadExit)
if (success == False):
    print(tunnel.LastErrorText)
    sys.exit()