C#

ABN AMRO Create Signed JSON Web Token

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Demonstrates how to create a signed JWT to be used for authenticating requests to the ABN AMRO REST API's. C#

bool success = false;

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

//  Create public/private key pair (RSA)
Chilkat.Rsa rsa = new Chilkat.Rsa();

//  Generate a 2048-bit key.
Chilkat.PrivateKey privkey = new Chilkat.PrivateKey();
success = rsa.GenKey(2048,privkey);
if (success == false) {
    Debug.WriteLine(rsa.LastErrorText);
    return;
}

//  Export the key to PEM files.
//  Write one PEM file for the private key, and one for the public key.
success = privkey.SavePemFile("qa_data/pem/abnAmroPrivateKey.pem");

Chilkat.PublicKey pubkey = new Chilkat.PublicKey();
privkey.ToPublicKey(pubkey);
success = pubkey.SavePemFile(true,"qa_data/pem/abnAmroPublicKey.pem");
//  Note: Please share your public key along with your app name and developer email id at api.support@nl.abnamro.com. 
//  Token generation will not work unless public key is associated with your app.

//  Create the JWT.
Chilkat.Jwt jwt = new Chilkat.Jwt();

//  Create the header:
//  {
//      "typ": "JWT",
//      "alg": "RS256"
//  }
Chilkat.JsonObject jsonHeader = new Chilkat.JsonObject();
jsonHeader.UpdateString("typ","JWT");
jsonHeader.UpdateString("alg","RS256");

//  Create the payload:
//  {
//      "nbf": 1499947668,
//      "exp": 1499948668,
//      "iss": "me",
//      "sub": "anApiKey",
//      "aud": "https://auth-sandbox.abnamro.com/oauth/token"
//  }
Chilkat.JsonObject jsonPayload = new Chilkat.JsonObject();

int curDateTime = jwt.GenNumericDate(0);

//  Set the "not process before" timestamp to now.
success = jsonPayload.AddIntAt(-1,"nbf",curDateTime);

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

jsonPayload.UpdateString("iss","me");
jsonPayload.UpdateString("sub","anApiKey");
jsonPayload.UpdateString("aud","https://auth-sandbox.abnamro.com/oauth/token");

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

string jwtStr = jwt.CreateJwtPk(jsonHeader.Emit(),jsonPayload.Emit(),privkey);
if (jwt.LastMethodSuccess == false) {
    Debug.WriteLine(jwt.LastErrorText);
    return;
}

//  Here is the JWT:
Debug.WriteLine(jwtStr);