(Delphi ActiveX) HMAC with SHA256

Demonstrates how to compute a HMAC SHA256 keyed-hash message authentication code.

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
crypt: TChilkatCrypt2;
mac: WideString;

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

crypt := TChilkatCrypt2.Create(Self);

// The output will be Hex, so set the EncodingMode:
crypt.EncodingMode := 'hex';

// Set the hash algorithm:
// Choices are: md5, sha-1, sha256, sha384, sha512, md2, haval
crypt.HashAlgorithm := 'sha256';

// Set the HMAC key:
crypt.SetHmacKeyEncoded('The_API_Secret','ascii');
mac := crypt.HmacStringENC('The quick brown fox jumps over the lazy dog');
Memo1.Lines.Add(mac);
end;