CkPython

Use a Smart Card Certificate + Private Key for SSL/TLS Authentication

See more ScMinidriver Examples

Demonstrates how to use a certificate + private key located on a smart card for the TLS client certificate in an HTTPS request.

Note: This example only works on Windows. ScMinidriver is a Windows-specific smart card and USB token minidriver that enables smart card authentication and cryptographic operations within Windows operating systems.

CkPython

import sys
import chilkat

success = False

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

scmd = chilkat.CkScMinidriver()

# Reader names (smart card readers or USB tokens) can be discovered
# via List Readers or Find Smart Cards
readerName = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0"
success = scmd.AcquireContext(readerName)
if (success == False):
    print(scmd.lastErrorText())
    sys.exit()

# If successful, the name of the currently inserted smart card is available:
print("Card name: " + scmd.cardName())

# If desired, perform regular PIN authentication with the smartcard.
# For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
retval = scmd.PinAuthenticate("user","000000")
if (retval != 0):
    print("PIN Authentication failed.")

# You can find a cerficate using any of the following certificate parts:
# "subjectDN" -- The full distinguished name of the cert.
# "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
# "subjectCN" -- The common name part (CN) of the certificate's subject.
# "serial" -- The certificate serial number.
# "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
# These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
# See List Certificates on Smart Card Example
certPart = "subjectCN"
partValue = "BadSSL Client Certificate"

# If the certificate is found, it is loaded into the cert object.
# Note: We imported this certificate from a .p12/.pfx using this Example to Import a .pfx/.p12 onto a Smart Card
cert = chilkat.CkCert()
success = scmd.FindCert(certPart,partValue,cert)
if (success == False):
    print("Failed to find the certificate.")
    scmd.DeleteContext()
    sys.exit()

print("Successfully loaded the cert object from the smart card / USB token.")

# Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
# The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
# If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
# because the smart card ScMinidriver session will no longer be authenticated or deleted.

# ------------------------------------------------------------------------------------------------------------

# Send an HTTPS request to https://client.badssl.com
# https://client.badssl.com (part of the badssl.com service) lets you test authentication using client SSL certificates. 
# The client certificate can be downloaded from https://badssl.com/download/.
# This server returns 200 OK if the correct client certificate is provided, and 400 Bad Request otherwise.

http = chilkat.CkHttp()

# Provide the client certificate (linked internally to our authenticated smartcard session)
success = http.SetSslClientCert(cert)
if (success == False):
    print(http.lastErrorText())
    scmd.DeleteContext()
    sys.exit()

responseBody = http.quickGetStr("https://client.badssl.com/")
if (http.get_LastMethodSuccess() == False):
    print(http.lastErrorText())
    scmd.DeleteContext()
    sys.exit()

print("Response status code: " + str(http.get_LastStatus()))
print("Response body: ")
print(responseBody)

# ------------------------------------------------------------------------------------------------------------
# Cleanup our ScMinidriver session...

# When finished with operations that required authentication, you may if you wish, deauthenticate the session.
success = scmd.PinDeauthenticate("user")
if (success == False):
    print(scmd.lastErrorText())

# Delete the context when finished with the card.
success = scmd.DeleteContext()
if (success == False):
    print(scmd.lastErrorText())