(Delphi ActiveX) Duo Auth API - Async Auth

See more Duo Auth MFA Examples

If you enable async, then your application will be able to retrieve real-time status updates from the authentication process, rather than receiving no information until the process is complete.

Note: This example requires Chilkat v9.5.0.89 or greater.

For more information, see https://duo.com/docs/authapi#/auth_status

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
integrationKey: WideString;
secretKey: WideString;
http: TChilkatHttp;
url: WideString;
req: TChilkatHttpRequest;
resp: IChilkatHttpResponse;
json: TChilkatJsonObject;
success: Integer;
txid: WideString;
sbUrl: TChilkatStringBuilder;
sbResult: TChilkatStringBuilder;
responseStatus: WideString;
responseStatus_msg: WideString;
i: Integer;
maxWaitIterations: Integer;

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

integrationKey := 'DIMS3V5QDVG9J9ABRXC4';
secretKey := 'HWVQ46nubLBxhnRlKddTltWIi3hL0fIQF2qTvLab';

http := TChilkatHttp.Create(Self);

http.Accept := 'application/json';

// Use your own hostname here:
url := 'https://api-a03782e1.duosecurity.com/auth/v2/auth';

// This example requires Chilkat v9.5.0.89 or greater because Chilkat will automatically
// generate and send the HMAC signature for the requires based on the integration key and secret key.
http.Login := integrationKey;
http.Password := secretKey;

req := TChilkatHttpRequest.Create(Self);
req.AddParam('username','matt');
req.AddParam('factor','push');
// The device ID can be obtained from the preauth response.  See Duo Preauth Example
req.AddParam('device','DP6GYVTQ5NK82BMR851F');
// Add the async param to get an immediate response, then periodically check for updates to find out when the MFA authentication completes for fails.
req.AddParam('async','1');

resp := http.PostUrlEncoded(url,req.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('status code = ' + IntToStr(resp.StatusCode));

json := TChilkatJsonObject.Create(Self);
success := json.Load(resp.BodyStr);
json.EmitCompact := 0;
Memo1.Lines.Add(json.Emit());

if (resp.StatusCode <> 200) then
  begin

    Exit;
  end;

// Sample successful output:

// status code = 200

// {
//   "stat": "OK",
//   "response": {
//     "txid": "45f7c92b-f45f-4862-8545-e0f58e78075a"
//   }
// }

txid := json.StringOf('response.txid');

// Use your own hostname here:
sbUrl := TChilkatStringBuilder.Create(Self);
sbUrl.Append('https://api-a03782e1.duosecurity.com/auth/v2/auth_status?txid=');
sbUrl.Append(txid);

Memo1.Lines.Add('Auth status URL: ' + sbUrl.GetAsString());

sbResult := TChilkatStringBuilder.Create(Self);

// Wait for a response...
i := 0;
maxWaitIterations := 100;
while i < maxWaitIterations do
  begin
    // Wait 3 seconds.
    http.SleepMs(3000);

    Memo1.Lines.Add('Polling...');

    resp := http.QuickRequest('GET',sbUrl.GetAsString());
    if (http.LastMethodSuccess = 0) then
      begin
        Memo1.Lines.Add(http.LastErrorText);
        Exit;
      end;

    if (resp.StatusCode <> 200) then
      begin
        Memo1.Lines.Add('error status code = ' + IntToStr(resp.StatusCode));
        Memo1.Lines.Add(resp.BodyStr);
        Memo1.Lines.Add('Failed.');

        Exit;
      end;

    // Sample response:

    // 	{
    // 	  "stat": "OK",
    // 	  "response": {
    // 	    "result": "waiting",
    // 	    "status": "pushed",
    // 	    "status_msg": "Pushed a login request to your phone..."
    // 	  }
    // 	}

    json.Load(resp.BodyStr);

    // The responseResult can be "allow", "deny", or "waiting"
    sbResult.Clear();
    json.StringOfSb('response.result',sbResult.ControlInterface);
    responseStatus := json.StringOf('response.status');
    responseStatus_msg := json.StringOf('response.status_msg');

    Memo1.Lines.Add(sbResult.GetAsString());
    Memo1.Lines.Add(responseStatus);
    Memo1.Lines.Add(responseStatus_msg);
    Memo1.Lines.Add('');

    if (sbResult.ContentsEqual('waiting',1) = 1) then
      begin
        i := i + 1;
      end
    else
      begin
        // Force loop exit..
        i := maxWaitIterations;
      end;
  end;

Memo1.Lines.Add('Finished.');
end;