C#

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. C#

bool success = false;

Chilkat.Asn asn = new Chilkat.Asn();

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

//  Convert ASN.1 to XML:
string strXml = asn.AsnToXml();
if (asn.LastMethodSuccess != true) {
    Debug.WriteLine(asn.LastErrorText);
    return;
}

//  The XML returned by AsnToXml will be compact and not pretty-formatted.
//  Use Chilkat XML to format the XML better:
Chilkat.Xml xml = new Chilkat.Xml();
success = xml.LoadXml(strXml);
//  Assuming success for this example..
//  This is formatted better for human viewing:
Debug.WriteLine(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.
string strBase64 = asn.GetEncodedDer("base64");

//  Load the ASN.1 from XML:
Chilkat.Asn asn2 = new Chilkat.Asn();
success = asn2.LoadAsnXml(xml.GetXml());
if (success != true) {
    Debug.WriteLine(asn2.LastErrorText);
    return;
}

//  Load the ASN.1 from an encoded string, such as base64:
Chilkat.Asn asn3 = new Chilkat.Asn();
success = asn3.LoadEncoded(strBase64,"base64");
if (success != true) {
    Debug.WriteLine(asn3.LastErrorText);
    return;
}