(Android™) ABN AMRO OAuth2 Client Credentials Authentication

Demonstrates how to obtain an access token for an ABN AMRO online API using OAuth2 with the Client Credentials flow.

For more information, see https://developer.abnamro.com/api/payment-initiation-v1/payment-initiation-tutorial

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

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

    // This example sends the following CURL request:

    // 	curl -X POST -k https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2 \
    // 	-v \
    // 	--cert TPPCertificate.crt \
    // 	--key TPPprivateKey.key \
    // 	-H 'Cache-Control: no-cache' \
    // 	-H 'Content-Type: application/x-www-form-urlencoded' \
    // 	-d 'grant_type=client_credentials&client_id=TPP_test&scope=psd2:payment:sepa:write psd2:payment:sepa:read'

    CkCert cert = new CkCert();
    boolean success = cert.LoadFromFile("qa_data/certs/TPPCertificate.cer");
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    CkBinData bdKey = new CkBinData();
    success = bdKey.LoadFile("qa_data/certs/TPPprivateKey.key");

    CkPrivateKey privKey = new CkPrivateKey();
    success = privKey.LoadAnyFormat(bdKey,"passwordIfNeeded");
    if (success != true) {
        Log.i(TAG, privKey.lastErrorText());
        return;
        }

    success = cert.SetPrivateKey(privKey);
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    CkHttp http = new CkHttp();

    success = http.SetSslClientCert(cert);
    if (success != true) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    CkHttpRequest req = new CkHttpRequest();
    req.AddParam("grant_type","client_credentials");
    req.AddParam("client_id","TPP_test");
    req.AddParam("scope","psd2:payment:sepa:write psd2:payment:sepa:read");

    CkHttpResponse resp = http.PostUrlEncoded("https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2",req);
    if (http.get_LastMethodSuccess() == false) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    if (resp.get_StatusCode() != 200) {
        Log.i(TAG, resp.bodyStr());

        return;
        }

    // Get the JSON result:
    // {"access_token":"TIhycwl8rfrZPkXGw15mwldASAAK","token_type":"Bearer","expires_in":7200}
    CkJsonObject json = new CkJsonObject();
    json.Load(resp.bodyStr());
    Log.i(TAG, "access_token: " + json.stringOf("access_token"));
    Log.i(TAG, "token_type: " + json.stringOf("token_type"));
    Log.i(TAG, "expires_in: " + json.stringOf("expires_in"));


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}