Pascal (Lazarus/Delphi)

Hash the Contents of a String (SHA256 and other hash algorithms)

See more Encryption Examples

Demonstrates how to hash the contents of a string using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc. 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,
  Chilkat.StringBuilder;

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

procedure RunDemo;
var
  crypt: TCrypt2;
  hashBytes: TBytes;
  sb: TStringBuilder;

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

  crypt := TCrypt2.Create;

  //  Choose the hash algorithm.
  //  Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
  crypt.HashAlgorithm := 'sha256';

  //  The byte representation of the string matters when hashing. 
  //  Tell Chilkat that we want to use the utf-8 byte representation.
  crypt.Charset := 'utf-8';

  hashBytes := crypt.HashString('They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.');

  //  Let's examine the hash as a hex string.
  sb := TStringBuilder.Create;
  sb.AppendEncoded(hashBytes,'hex');
  WriteLn('SHA256 hash = ' + sb.GetAsString());


  crypt.Free;
  sb.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.