Pascal (Lazarus/Delphi)

HMAC with SHA256

See more Encryption Examples

Demonstrates how to compute a HMAC SHA256 keyed-hash message authentication code. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Crypt2;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  crypt: TCrypt2;
  mac: string;

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

  crypt := TCrypt2.Create;

  //  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';
  crypt.MacAlgorithm := 'hmac';

  //  Set the HMAC key:
  crypt.SetMacKeyEncoded('The_API_Secret','ascii');
  mac := crypt.MacStringENC('The quick brown fox jumps over the lazy dog');
  WriteLn(mac);


  crypt.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.