Pascal (Lazarus/Delphi)

Demonstrates HMAC SHA256

See more Encryption Examples

Demonstrates HMAC-SHA256. Also demonstrates HMAC-SHA1 and HMAC-MD5. 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;
  sData: string;

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

  //  Demonstrates how to reproduce the following results found at
  //  https://en.wikipedia.org/wiki/Hash-based_message_authentication_code

  //  HMAC_SHA256("key", "The quick brown fox jumps over the lazy dog") = 0xf7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
  //  HMAC_MD5("key", "The quick brown fox jumps over the lazy dog")    = 0x80070713463e7749b90c2dc24911e275
  //  HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog")   = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9

  crypt := TCrypt2.Create;

  crypt.MacAlgorithm := 'hmac';
  crypt.EncodingMode := 'hex';
  crypt.SetMacKeyString('key');
  sData := 'The quick brown fox jumps over the lazy dog';

  crypt.HashAlgorithm := 'SHA-256';
  WriteLn('HMAC_SHA256: ' + crypt.MacStringENC(sData));

  crypt.HashAlgorithm := 'MD5';
  WriteLn('HMAC_MD5: ' + crypt.MacStringENC(sData));

  crypt.HashAlgorithm := 'SHA-1';
  WriteLn('HMAC_SHA1: ' + crypt.MacStringENC(sData));

  //  The output is the same (ignore case)
  //  HMAC_SHA256: F7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
  //  HMAC_MD5: 80070713463E7749B90C2DC24911E275
  //  HMAC_SHA1: DE7C9B85B8B78AA6BC8A7A36F70A90701C9DB4D9


  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.