Node.js

Sign String to create a CAdES-T Signature, using HTTP Proxy to Access Timestamp Server

This example will sign a string to create a CAdEST-T signature. It will use an HTTP proxy to access the timestamp server. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var crypt = new chilkat.Crypt2();

    var cert = new chilkat.Cert();
    cert.SmartCardPin = "123456";
    success = cert.LoadFromSmartcard("");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    success = crypt.SetSigningCert(cert);

    //  Use SHA-256 rather than the default of SHA-1
    crypt.HashAlgorithm = "sha256";

    //  Create JSON that tells Chilkat what signing attributes to include:
    var attrs = new chilkat.JsonObject();
    attrs.UpdateBool("contentType",true);
    attrs.UpdateBool("signingTime",true);
    attrs.UpdateBool("messageDigest",true);
    attrs.UpdateBool("signingCertificateV2",true);

    //  A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
    //  We must include the TSA's URL, as well as a few options to indicate what is desired.
    //  Except for the TSA URL, the options shown here are typically what you would need.
    attrs.UpdateBool("timestampToken.enabled",true);
    attrs.UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr");
    attrs.UpdateBool("timestampToken.addNonce",false);
    attrs.UpdateBool("timestampToken.requestTsaCert",true);
    attrs.UpdateString("timestampToken.hashAlg","sha256");

    crypt.SigningAttributes = attrs.Emit();

    var strToSign = "Hello World!";

    var bd = new chilkat.BinData();
    bd.AppendString(strToSign,"utf-8");

    //  -------------------------------------------------------------------------
    //  The purpose of this example is to show how an HTTP object with custom
    //  settings can be used to access the Internet when signing.
    //  Access to the Internet is needed to communicate with the timestamp server.
    var http = new chilkat.Http();
    //  This can be a domain name, hostname, or IP address.
    http.ProxyDomain = "172.16.16.56";
    http.ProxyPort = 808;
    http.ProxyLogin = "myProxyLogin";
    http.ProxyPassword = "myProxyPassword";
    crypt.SetTsaHttpObj(http);
    //  -------------------------------------------------------------------------

    //  This creates the CAdES-T signature.  During the signature creation, it
    //  communicates with the TSA to get a timestampToken.
    //  The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
    success = crypt.OpaqueSignBd(bd);
    if (success !== true) {
        console.log(crypt.LastErrorText);
        return;
    }

    //  Get the signature in base64 format:
    console.log(bd.GetEncoded("base64_mime"));

    console.log("Success.");

}

chilkatExample();