(Visual FoxPro) Convert Java KeyStore to PEM

Loads a Java keystore file and saves the trusted certificate entries to a PEM file.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loJks
LOCAL lcJksPassword
LOCAL loFac
LOCAL lnNumCerts
LOCAL loCert
LOCAL lcPem
LOCAL i

lnSuccess = 0

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

loJks = CreateObject('Chilkat.JavaKeyStore')

lcJksPassword = "myJksPassword"

* Load the Java keystore from a file.  The JKS file password is used
* to verify the keyed digest that is found at the very end of the keystore.
* It verifies that the keystore has not been modified.
lnSuccess = loJks.LoadFile(lcJksPassword,"/someDir/keyStore.jks")
IF (lnSuccess = 0) THEN
    ? loJks.LastErrorText
    RELEASE loJks
    CANCEL
ENDIF

* Open/create the output PEM file. 
* This example uses Chilkat's file access class for writing the output file.
* You may replace the file I/O lines of code with whatever is most convenient for you.
loFac = CreateObject('Chilkat.FileAccess')
lnSuccess = loFac.OpenForWrite("/pemFiles/caCerts.pem")
IF (lnSuccess = 0) THEN
    ? loFac.LastErrorText
    RELEASE loJks
    RELEASE loFac
    CANCEL
ENDIF

lnNumCerts = loJks.NumTrustedCerts

loCert = CreateObject('Chilkat.Cert')

* Iterate over the trusted certs, get the PEM for each,
* and append it to the output file.
i = 0
DO WHILE i < lnNumCerts
    loJks.TrustedCertAt(i,loCert)

    * Get the certificate in PEM format.  
    lcPem = loCert.ExportCertPem()

    * Append the PEM string to the open file.
    lnSuccess = loFac.AppendText(lcPem,"utf-8")
    IF (lnSuccess <> 1) THEN
        ? loFac.LastErrorText
        RELEASE loJks
        RELEASE loFac
        RELEASE loCert
        CANCEL
    ENDIF

    i = i + 1
ENDDO

* Close the output file.
loFac.FileClose()

? "Trusted certificates saved to PEM."

RELEASE loJks
RELEASE loFac
RELEASE loCert