Visual Basic 6.0 Requires Chilkat v11.0.0+

Convert Java KeyStore to PEM

See more Java KeyStore (JKS) Examples

Loads a Java keystore file and saves the trusted certificate entries to a PEM file. Visual Basic 6.0

Dim success As Long
success = 0

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

Dim jks As New ChilkatJavaKeyStore

Dim jksPassword As String
jksPassword = "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.
success = jks.LoadFile(jksPassword,"/someDir/keyStore.jks")
If (success = 0) Then
    Debug.Print jks.LastErrorText
    Exit Sub
End If

'  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.
Dim fac As New CkFileAccess
success = fac.OpenForWrite("/pemFiles/caCerts.pem")
If (success = 0) Then
    Debug.Print fac.LastErrorText
    Exit Sub
End If

Dim numCerts As Long
numCerts = jks.NumTrustedCerts

Dim cert As New ChilkatCert
Dim pem As String

'  Iterate over the trusted certs, get the PEM for each,
'  and append it to the output file.
Dim i As Long
i = 0
Do While i < numCerts
    success = jks.TrustedCertAt(i,cert)

    '  Get the certificate in PEM format.  
    pem = cert.ExportCertPem()

    '  Append the PEM string to the open file.
    success = fac.AppendText(pem,"utf-8")
    If (success <> 1) Then
        Debug.Print fac.LastErrorText
        Exit Sub
    End If

    i = i + 1
Loop

'  Close the output file.
fac.FileClose 

Debug.Print "Trusted certificates saved to PEM."