(CkPython) Load Default Certificate from Smart Card or Token

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Chilkat contains internal logic to examine a connected smart card or USB token, and will make decisions based on make/model to successfully interact with the hardware. When faced with a new smartcard or token, the best starting point is to call LoadFromSmartcard with an empty string argument to see what Chilkat discovers.

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import sys
import chilkat

cert = chilkat.CkCert()

# If you know the smart card PIN, it's good to set it prior to loading from the smartcard/USB token.
cert.put_SmartCardPin("12345678")

# To let Chilkat discover what smartcard or token is connected, pass an empty string to LoadFromSmartcard.
# When testing in this way, it's best to have only a single smartcard or token connected to the system.
success = cert.LoadFromSmartcard("")
if (success == False):
    print(cert.lastErrorText())
    print("Certificate not loaded.")
    sys.exit()

# The LastErrorText property on all Chilkat objects will contain 
# information even when the method call is successful.
# You can examine the LastErrorText to see what Chilkat found and
# what decisions were made.
# 
# For example, if a certificate was successfully loaded via LoadFromSmartcard,
# but then signing failed, such as w/ Pdf, XmlDSig, CAdES, etc.,
# then we would want to examine the LastErrorText from the call to
# LoadFromSmartcard to get detailed information about the card.
print(cert.lastErrorText())

print("Found: " + cert.subjectDN() + " serial=" + cert.serialNumber())