(Go) Convert Java KeyStore to PEM

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

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    jks := chilkat.NewJavaKeyStore()

    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 != true {
        fmt.Println(jks.LastErrorText())
        jks.DisposeJavaKeyStore()
        return
    }

    // 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.
    fac := chilkat.NewFileAccess()
    success = fac.OpenForWrite("/pemFiles/caCerts.pem")
    if success != true {
        fmt.Println(fac.LastErrorText())
        jks.DisposeJavaKeyStore()
        fac.DisposeFileAccess()
        return
    }

    numCerts := jks.NumTrustedCerts()
    var i int

    // cert is a Cert
    var pem *string = new(string)

    // Iterate over the trusted certs, get the PEM for each,
    // and append it to the output file.
    i = 0
    for i < numCerts {
        cert := jks.GetTrustedCert(i)

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

        // Append the PEM string to the open file.
        // The PEM contains only us-ascii chars..
        success = fac.AppendAnsi(*pem)
        if success != true {
            fmt.Println(fac.LastErrorText())
            cert.DisposeCert()
            jks.DisposeJavaKeyStore()
            fac.DisposeFileAccess()
            return
        }

        cert.DisposeCert()
        i = i + 1
    }

    // Close the output file.
    fac.FileClose()

    fmt.Println("Trusted certificates saved to PEM.")

    jks.DisposeJavaKeyStore()
    fac.DisposeFileAccess()