Node.js

PRODA Get OAuth2 Access Token using JWT

See more PRODA Examples

Demonstrates how to get an OAuth2 access token for the PRODA Australian Government Online Services using a JWT. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    // First create a JWT to be sent in the POST to https://vnd.proda.humanservices.gov.au/mga/sps/oauth/oauth20/token

    var privKey = new chilkat.PrivateKey();

    // Load an RSA private key from a PEM file.
    // Chilkat provides alternative methods to load from other formats, or to load from a string or binary data.
    success = privKey.LoadEncryptedPemFile("qa_data/pem/rsa_passwd.pem","passwd");
    if (success == false) {
        console.log(privKey.LastErrorText);
        return;
    }

    var jwt = new chilkat.Jwt();

    // Build the JOSE header
    var jose = new chilkat.JsonObject();
    // Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
    success = jose.AppendString("alg","RS256");
    success = jose.AppendString("typ","JWT");
    success = jose.AppendString("kid","test-device");

    // Now build the JWT claims (also known as the payload)
    var claims = new chilkat.JsonObject();
    success = claims.AppendString("iss","9646844092");
    success = claims.AppendString("sub","test-device");
    success = claims.AppendString("aud","https://proda.humanservices.gov.au");

    // Set the timestamp of when the JWT was created to now.
    var curDateTime = jwt.GenNumericDate(0);
    success = claims.AddIntAt(-1,"iat",curDateTime);

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 hour (3600 seconds)
    success = claims.AddIntAt(-1,"exp",curDateTime+3600);

    // Produce the smallest possible JWT:
    jwt.AutoCompact = true;

    // Create the JWT token.  This is where the RSA signature is created.
    var jwtToken = jwt.CreateJwtPk(jose.Emit(),claims.Emit(),privKey);

    // ---------------------------------------------------------------------
    // Build and send the POST, which should look something like this:

    // POST https://vnd.proda.humanservices.gov.au/mga/sps/oauth/oauth20/token HTTP/1.1
    // Content-Type: application/x-www-form-urlencoded
    // Content-Length: 666
    // Host: vnd.proda.humanservices.gov.au
    // 
    // grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=<jwt>&client_id=VendorClient03

    var http = new chilkat.Http();

    var req = new chilkat.HttpRequest();
    req.HttpVerb = "POST";
    req.ContentType = "application/x-www-form-urlencoded";

    // Add the request params.
    req.AddParam("grant_type","urn:ietf:params:oauth:grant-type:jwt-bearer");
    req.AddParam("assertion",jwtToken);
    req.AddParam("client_id","VendorClient03");

    var resp = new chilkat.HttpResponse();
    success = http.HttpReq("https://vnd.proda.humanservices.gov.au/mga/sps/oauth/oauth20/token",req,resp);
    if (success == false) {
        console.log(http.LastErrorText);
        return;
    }

    console.log("Response status code = " + resp.StatusCode);
    console.log("Response body:");
    console.log(resp.BodyStr);

}

chilkatExample();