Go

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. Go

    success := false

    asn := chilkat.NewAsn()

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

    // Convert ASN.1 to XML:
    strXml := asn.AsnToXml()
    if asn.LastMethodSuccess() != true {
        fmt.Println(asn.LastErrorText())
        asn.DisposeAsn()
        return
    }

    // The XML returned by AsnToXml will be compact and not pretty-formatted.
    // Use Chilkat XML to format the XML better:
    xml := chilkat.NewXml()
    success = xml.LoadXml(*strXml)
    // Assuming success for this example..
    // This is formatted better for human viewing:
    fmt.Println(*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.
    strBase64 := asn.GetEncodedDer("base64")

    // Load the ASN.1 from XML:
    asn2 := chilkat.NewAsn()
    success = asn2.LoadAsnXml(*xml.GetXml())
    if success != true {
        fmt.Println(asn2.LastErrorText())
        asn.DisposeAsn()
        xml.DisposeXml()
        asn2.DisposeAsn()
        return
    }

    // Load the ASN.1 from an encoded string, such as base64:
    asn3 := chilkat.NewAsn()
    success = asn3.LoadEncoded(*strBase64,"base64")
    if success != true {
        fmt.Println(asn3.LastErrorText())
        asn.DisposeAsn()
        xml.DisposeXml()
        asn2.DisposeAsn()
        asn3.DisposeAsn()
        return
    }


    asn.DisposeAsn()
    xml.DisposeXml()
    asn2.DisposeAsn()
    asn3.DisposeAsn()