(CkPython) Get the Server Certificate, Certificate Chain, and Root CA Certificate

Demonstrates how to get the HTTP server certificate, its certificate chain, and the root CA certificate.

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import sys
import chilkat

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

http = chilkat.CkHttp()

# We're getting the SSL/TLS certificate, so make sure to connect to the SSL/TLS port (443).
# sslCert is a CkCert
sslCert = http.GetServerSslCert("nationalgeographic.com",443)
if (http.get_LastMethodSuccess() == False):
    print(http.lastErrorText())
    sys.exit()

# Note: Prior to v9.5.0.50, this method would fail if the certificate chain could not 
# be completed to the root.  Starting in v9.5.0.50, the incomplete certificate chain 
# will be returned.  The certificate chain's ReachesRoot property can be examined to 
# see if the chain was completed to the root.
# certChain is a CkCertChain
certChain = sslCert.GetCertChain()
if (sslCert.get_LastMethodSuccess() == False):
    print(sslCert.lastErrorText())

    sys.exit()

i = 0
numCerts = certChain.get_NumCerts()
while i < numCerts :
    # cert is a CkCert
    cert = certChain.GetCert(i)
    print("SubjectDN " + str(i) + ": " + cert.subjectDN())
    print("IssuerDN " + str(i) + ": " + cert.issuerDN())

    i = i + 1

# If the certificate chain reaches the root CA cert, then the last cert in the chain
# is the root CA cert.
if (certChain.get_ReachesRoot() == True):
    # caCert is a CkCert
    caCert = certChain.GetCert(numCerts - 1)
    print("CA Root Cert: " + caCert.subjectDN())