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.

LOCAL loCert
LOCAL lnSuccess
LOCAL loPkey

loCert = CreateObject('Chilkat.Cert')

*  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:

lnSuccess = loCert.LoadByCommonName("Chilkat Software, Inc.")
IF (lnSuccess = 0) THEN
    =MESSAGEBOX("Failed to find certificate!")
ELSE

    *  Get the PublicKey object:

    loPkey = loCert.ExportPublicKey()
    IF (NOT (loPkey = NULL )) THEN

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

        *  Export to an OpenSSL DER file:
        loPkey.SaveOpenSslDerFile("pubkey_openssl.der")

        *  Export to an OpenSSL PEM file:
        loPkey.SaveOpenSslPemFile("pubkey_openssl.pem")

        *  Export to an XML file:
        loPkey.SaveXmlFile("pubkey.xml")

        *  Get OpenSSL PEM string:
        ? "OpenSSL PEM Public Key:"
        ? loPkey.GetOpenSslPem()

    ELSE
        =MESSAGEBOX("No public key found!")
    ENDIF

ENDIF

*  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.