(CkPython) SFTP use Cert's Private Key for Authentication (Windows)

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed.

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

cert = chilkat.CkCert()

# Load the certificate from the Windows certificate store
success = cert.LoadByCommonName("my_cert_common_name")
if (success == False):
    print(cert.lastErrorText())
    sys.exit()

# Get the private key.  
# privKey is a CkPrivateKey
privKey = cert.ExportPrivateKey()
if (cert.get_LastMethodSuccess() == False):
    print(cert.lastErrorText())
    sys.exit()

privKeyPem = privKey.getPkcs8Pem()
if (privKey.get_LastMethodSuccess() == False):
    print(privKey.lastErrorText())
    sys.exit()

sshKey = chilkat.CkSshKey()
success = sshKey.FromOpenSshPrivateKey(privKeyPem)
if (success == False):
    print(sshKey.lastErrorText())
    sys.exit()

# Connect to an SSH/SFTP server
sftp = chilkat.CkSFtp()
success = sftp.Connect("sftp.example.com",22)
if (success == False):
    print(sftp.lastErrorText())
    sys.exit()

# Authenticate with the SSH server using a username + private key.
# (The private key serves as the password.  The username identifies
# the SSH user account on the server.)
success = sftp.AuthenticatePk("mySshLogin",sshKey)
if (success == False):
    print(sftp.lastErrorText())
    sys.exit()

print("OK, the connection and authentication with the SSH server is completed.")

# This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...