CkPython

Load Particular CA Certs into a Java KeyStore

See more Java KeyStore (JKS) Examples

Opens a PEM file containing many CA root certificates, and creates a Java keystore containing a subset of the certificates. CkPython

import sys
import chilkat

success = False

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

jks = chilkat.CkJavaKeyStore()

troots = chilkat.CkTrustedRoots()

# Load certificates from a file.
success = troots.LoadCaCertsPem("qa_data/curl_cacert.pem")
if (success != True):
    print(troots.lastErrorText())
    sys.exit()

sbDn = chilkat.CkStringBuilder()
sbAlias = chilkat.CkStringBuilder()
caseSensitive = False

i = 0
numCerts = troots.get_NumCerts()
numAdded = 0
while (i < numCerts) :
    # cacert is a CkCert
    cacert = troots.GetCert(i)
    sbDn.Clear()
    sbDn.Append(cacert.subjectDN())
    if (sbDn.Contains("Entrust.net",caseSensitive) == True):
        print(cacert.subjectDN())

        # The alias is an arbitrary unique string for each cert in the JKS.
        sbAlias.Clear()
        sbAlias.Append("cacert_")
        sbAlias.AppendInt(i + 1)
        jks.AddTrustedCert(cacert,sbAlias.getAsString())
        numAdded = numAdded + 1

    i = i + 1

# Verify the number of certs in the JKS equals the number we added.
numJksCerts = jks.get_NumTrustedCerts()
print("NumTrustedCerts = " + str(numJksCerts))
if (numJksCerts != numAdded):
    print("Something is amiss!")
    sys.exit()

# Save the JKS.
success = jks.ToFile("myPassword","qa_data/jks/entrust_caCerts.jks")
if (success != True):
    print(jks.lastErrorText())
    sys.exit()

print("Success.")

# The output of this program when tested was:

# C=US, O=Entrust.net, OU=www.entrust.net/CPS incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.net Secure Server Certification Authority
# O=Entrust.net, OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.net Certification Authority (2048)
# C=US, O="Entrust, Inc.", OU=www.entrust.net/CPS is incorporated by reference, OU="(c) 2006 Entrust, Inc.", CN=Entrust Root Certification Authority
# NumTrustedCerts = 3
# Success.