Pascal (Lazarus/Delphi)

Hash Algorithms: SHA-1, HAVAL, MD2, MD5, SHA-256, SHA-384, SHA-512

See more Encryption Examples

How to create hashes (message digests) for strings. 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;
  s: string;
  hash: string;

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

  crypt := TCrypt2.Create;

  s := 'The quick brown fox jumps over the lazy dog';

  crypt.HashAlgorithm := 'sha1';
  crypt.EncodingMode := 'hex';

  //  Other possible EncodingMode settings are: 
  //  "quoted-printable", "base64","url", and many more..

  hash := crypt.HashStringENC(s);
  WriteLn('SHA1: ' + hash);

  //  Hash using MD2
  crypt.HashAlgorithm := 'md2';
  hash := crypt.HashStringENC(s);
  WriteLn('MD2: ' + hash);

  //  Hash using MD5
  crypt.HashAlgorithm := 'md5';
  hash := crypt.HashStringENC(s);
  WriteLn('MD5: ' + hash);

  //  Note: SHA-2 is a set of cryptographic hash functions (SHA-224, SHA-256, SHA-384, SHA-512)

  //  Hash using SHA-256
  crypt.HashAlgorithm := 'sha256';
  hash := crypt.HashStringENC(s);
  WriteLn('SHA256: ' + hash);

  //  Hash using SHA-384
  crypt.HashAlgorithm := 'sha384';
  hash := crypt.HashStringENC(s);
  WriteLn('SHA384: ' + hash);

  //  Hash using SHA-512
  crypt.HashAlgorithm := 'sha512';
  hash := crypt.HashStringENC(s);
  WriteLn('SHA512: ' + hash);

  //  Hash using HAVAL
  //  There are two additional properties relevant to HAVAL:
  //  HavalRounds, and KeyLength.
  //  HavalRounds can have values of 3, 4, or 5.
  //  KeyLength can have values of 128, 160, 192, 224, or 256
  crypt.HashAlgorithm := 'haval';
  crypt.HavalRounds := 5;
  crypt.KeyLength := 256;
  hash := crypt.HashStringENC(s);
  WriteLn('Haval: ' + hash);

  //  Hashes for "The quick brown fox jumps over the lazy dog"

  //  SHA1:
  //  2FD4E1C67A2D28FCED849EE1BB76E7391B93EB12

  //  MD2:
  //  03D85A0D629D2C442E987525319FC471

  //  MD5:
  //  9E107D9D372BB6826BD81D3542A419D6

  //  SHA256:
  //  D7A8FBB307D7809469CA9ABCB0082E4F8D5651E46D3CDB762D02D0BF37C9E592

  //  SHA384:
  //  CA737F1014A48F4C0B6DD43CB177B0AFD9E5169367544C494011E3317DBF9A509CB1E5DC1E85A941BBEE3D7F2AFBC9B1

  //  SHA512:
  //  07E547D9586F6A73F73FBAC0435ED76951218FB7D0C8D788A309D785436BBB642E93A252A954F23912547D1E8A3B5ED6E1BFD7097821233FA0538F3DB854FEE6

  //  Haval:
  //  B89C551CDFE2E06DBD4CEA2BE1BC7D557416C58EBB4D07CBC94E49F710C55BE4


  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.