(CkPython) Find Certificate on Smartcard Currenty in Reader

Finds the certificates on smartcards currently in readers.

Note: This example requires Chilkat v9.5.0.77 or greater.

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 newer example is a much better way to get the certificate on a smartcard or USB token

# This example requires that we already know the name of the CSP (Cryptographic Service Provider) for the smartcard.
# It is often the "Microsoft Base Smart Card Crypto Provider".  You can see what CSP's are registered on your system with this code:

csp = chilkat.CkCsp()
st = chilkat.CkStringTable()

success = csp.GetProviders(st)
if (success == False):
    print(csp.lastErrorText())
    sys.exit()

# Iterate over the CSP names..
i = 0
numProviders = st.get_Count()
while i < numProviders :
    print(str(i) + ": " + st.stringAt(i))
    i = i + 1

# --------------------------
# This newer example is a much better way to get the certificate on a smartcard or USB token

# We'll assume our smartcard is accessed through the "Microsoft Base Smart Card Crypto Provider"
# Also, we'll assume that the certificate has been installed into the default current user Windows
# certificate store by following the instructions provided by the smartcard vendor.
# (The certificate does not contain the private key.  The certificate should be installed in the
# Windows current user certificate store.  It will also be on the smartcard, and the associated private
# key is only on the smartcard.)
# 

# First open the Current User Certificate Store.  We'll need it soon..
certStore = chilkat.CkCertStore()
success = certStore.OpenCurrentUserStore(True)
if (success == False):
    print(certStore.lastErrorText())
    sys.exit()

# Create a Csp object and set the ProviderName equal to our desired CSP name.
# (setting the ProviderName selects the desired CSP.)
csp.put_ProviderName("Microsoft Base Smart Card Crypto Provider")

# Iterate over the key containers managed by this CSP.
# These will be the key containers for the cards currently inserted into the reader(s).
# If only one smartcard reader exists, and a smartcard is inserted, there should be one
# key container.
numContainers = csp.get_NumKeyContainers()

print("numContainers = " + str(numContainers))

i = 0
while i < numContainers :
    # For each key container, get the key container name and then find the certificate
    # in the Current User Certicate Store with the matching key container name.
    keyContainerName = csp.nthKeyContainerName(i)

    # cert is a CkCert
    cert = certStore.FindCertByKeyContainer(keyContainerName)
    if (certStore.get_LastMethodSuccess() == True):
        print("Certificate in reader: " + cert.subjectCN())

    i = i + 1