Delphi DLL

ABN AMRO OAuth2 Client Credentials Authentication

See more ABN AMRO Examples

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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, HttpResponse, JsonObject, HttpRequest, BinData, PrivateKey, Cert, Http;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
cert: HCkCert;
bdKey: HCkBinData;
privKey: HCkPrivateKey;
http: HCkHttp;
req: HCkHttpRequest;
resp: HCkHttpResponse;
json: HCkJsonObject;

begin
success := False;

// 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'

cert := CkCert_Create();
success := CkCert_LoadFromFile(cert,'qa_data/certs/TPPCertificate.cer');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

bdKey := CkBinData_Create();
success := CkBinData_LoadFile(bdKey,'qa_data/certs/TPPprivateKey.key');

privKey := CkPrivateKey_Create();
success := CkPrivateKey_LoadAnyFormat(privKey,bdKey,'passwordIfNeeded');
if (success = False) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

success := CkCert_SetPrivateKey(cert,privKey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

http := CkHttp_Create();

success := CkHttp_SetSslClientCert(http,cert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

req := CkHttpRequest_Create();
CkHttpRequest_AddParam(req,'grant_type','client_credentials');
CkHttpRequest_AddParam(req,'client_id','TPP_test');
CkHttpRequest_AddParam(req,'scope','psd2:payment:sepa:write psd2:payment:sepa:read');

CkHttpRequest_putHttpVerb(req,'POST');
CkHttpRequest_putContentType(req,'application/x-www-form-urlencoded');

resp := CkHttpResponse_Create();
success := CkHttp_HttpReq(http,'https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2',req,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

if (CkHttpResponse_getStatusCode(resp) <> 200) then
  begin
    Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
    Exit;
  end;

// Get the JSON result:
// {"access_token":"TIhycwl8rfrZPkXGw15mwldASAAK","token_type":"Bearer","expires_in":7200}
json := CkJsonObject_Create();
CkJsonObject_Load(json,CkHttpResponse__bodyStr(resp));
Memo1.Lines.Add('access_token: ' + CkJsonObject__stringOf(json,'access_token'));
Memo1.Lines.Add('token_type: ' + CkJsonObject__stringOf(json,'token_type'));
Memo1.Lines.Add('expires_in: ' + CkJsonObject__stringOf(json,'expires_in'));

CkCert_Dispose(cert);
CkBinData_Dispose(bdKey);
CkPrivateKey_Dispose(privKey);
CkHttp_Dispose(http);
CkHttpRequest_Dispose(req);
CkHttpResponse_Dispose(resp);
CkJsonObject_Dispose(json);

end;