Export Public Key to RSA DER, OpenSSL DER/PEM, XML

Demonstrates how to export a digital certificate's public key to RSA DER, OpenSSL PEM or DER, or to XML format.

Download Chilkat Python Library

import chilkat

cert = chilkat.CkCert()

#  Th LoadByCommonName method searches the Windows
#  Current User Certificate Store and Local Machine Certificate
#  Store for a certificate whose common name (CN) matches
#  the argument:

success = cert.LoadByCommonName("Chilkat Software, Inc.")
if (success == False):
    print "Failed to find certificate!"
else:

    #  Get the PublicKey object:

    pkey = cert.ExportPublicKey()
    if (not (pkey == None )):

        #  Export the public key to an RSA DER file:
        pkey.SaveRsaDerFile("pubkey_rsa.der")

        #  Export to an OpenSSL DER file:
        pkey.SaveOpenSslDerFile("pubkey_openssl.der")

        #  Export to an OpenSSL PEM file:
        pkey.SaveOpenSslPemFile("pubkey_openssl.pem")

        #  Export to an XML file:
        pkey.SaveXmlFile("pubkey.xml")

        #  Get OpenSSL PEM string:
        print "OpenSSL PEM Public Key:"
        print pkey.getOpenSslPem()

    else:
        print "No public key found!"

#  The Chilkat Certificate, Certificate Store, Private Key,
#  Public Key, and Key Container classes / objects are freeware.

#  They are used by and included with the Chilkat Email,
#  Crypt, S/MIME, and other commercial Chilkat components.