unit1.pas

压缩算法

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Memo1: TMemo;
    Memo3: TMemo;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  TKeyByte = array[0..5] of Byte;
  TDesMode = (dmEncry, dmDecry);

var
  Form1: TForm1;
  Str: String;

implementation

uses Des;

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  ts1, ts2: TTimeStamp;
begin
  Label2.Caption := '0';
  Label1.Caption := IntToStr(Length(Memo1.Text));
  Update;
  ts1 := DateTimeToTimeStamp(Now);
  Str := EncryStr(Memo1.Text, Memo1.Text);
  ts2 := DateTimeToTimeStamp(Now);
  Label2.Caption := IntToStr(ts2.Time - ts1.Time);

  Edit2.Text := EncryStrHex(Edit1.Text, Edit1.Text);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  ts1, ts2: TTimeStamp;
begin
  Label2.Caption := '0';
  Update;
  ts1 := DateTimeToTimeStamp(Now);
  Memo3.Text := DecryStr(Str, Memo1.Text);
  ts2 := DateTimeToTimeStamp(Now);
  Label2.Caption := IntToStr(ts2.Time - ts1.Time);

  Edit3.Text := DecryStrHex(Edit2.Text, Edit1.Text);
end;

end.