(Swift) Convert ASN.1 to/from Binary DER, XML, and Base64

Demonstrates how to convert ASN.1 from and to any of the following formats: binary DER, Base64, and XML.

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func chilkatTest() {
    let asn = CkoAsn()

    var success: Bool

    //  Begin with loading ASN.1 from a binary DER/BER format file.
    success = asn.LoadBinaryFile("/Users/chilkat/testData/p7b/test.p7b")
    if success != true {
        print("\(asn.LastErrorText)")
        return
    }

    //  Convert ASN.1 to XML:
    var strXml: String? = asn.AsnToXml()
    if asn.LastMethodSuccess != true {
        print("\(asn.LastErrorText)")
        return
    }

    //  The XML returned by AsnToXml will be compact and not pretty-formatted.
    //  Use Chilkat XML to format the XML better:
    let xml = CkoXml()
    success = xml.LoadXml(strXml)
    //  Assuming success for this example..
    //  This is formatted better for human viewing:
    print("\(xml.GetXml())")

    //  Now get the ASN.1 in base64 format.  Any encoding supported
    //  by Chilkat can be passed, such as "hex", "uu", "quoted-printable", "base32", "modbase64", etc.
    var strBase64: String? = asn.GetEncodedDer("base64")

    //  Load the ASN.1 from XML:
    let asn2 = CkoAsn()
    success = asn2.LoadAsnXml(xml.GetXml())
    if success != true {
        print("\(asn2.LastErrorText)")
        return
    }

    //  Load the ASN.1 from an encoded string, such as base64:
    let asn3 = CkoAsn()
    success = asn3.LoadEncoded(strBase64, encoding: "base64")
    if success != true {
        print("\(asn3.LastErrorText)")
        return
    }


}