Pascal (Lazarus/Delphi)

Generating Random Password

See more PRNG Examples

Demonstrates how to generate random passwords. 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.Prng;

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

procedure RunDemo;
var
  success: Boolean;
  fortuna: TPrng;
  bDigit: Boolean;
  bUpperAndLower: Boolean;
  otherChars: string;
  excludeChars: string;
  i: Integer;

begin
  success := False;

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

  success := False;

  fortuna := TPrng.Create;

  //  Set this equal to True if the generated password must include at least one digit (0-9)
  bDigit := True;

  //  Set this equal to True if the generated password must include both uppercase and lowercase chars.
  bUpperAndLower := True;

  //  The generated password must contain one of the following non-alphanumeric chars.
  otherChars := '@#$%*';

  //  Exclude chars that appear similar to others:
  excludeChars := 'iIlLoO0';

  //  Generate 8-character passwords:

  for i := 1 to 10 do
    begin
      WriteLn(fortuna.RandomPassword(8,bDigit,bUpperAndLower,otherChars,excludeChars));
    end;



  fortuna.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.