(Chilkat2-Python) Use Installed Cert on Windows for TLS Client Authentication

Demonstrates how to use a certificate that has already been installed on a Windows PC for TLS client authentication.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

http = chilkat2.Http()

# On Windows, a pre-installed certificate can be loaded in a number of different ways.
# This example loads by the common name:
cert = chilkat2.Cert()
success = cert.LoadByCommonName("My ECA Medium Assurance Identity Certificate")
if (success != True):
    print(cert.LastErrorText)
    sys.exit()

# Make sure this certificate has a private key available.
# It should be a private key such that when the certificate was installed, it was marked as "exportable"
# so that authorized programs are able to access the private key.
if (cert.HasPrivateKey() != True):
    print("A private key is needed for TLS client authentication.")
    print("This certificate has no private key.")
    sys.exit()

# Set the certificate to be used for mutual TLS authentication
# (i.e. sets the client-side certificate for two-way TLS authentication)
success = http.SetSslClientCert(cert)
if (success != True):
    print(http.LastErrorText)
    sys.exit()

# At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
# connection will automatically use it if the server demands a client-side cert.