AccesS密码的打击

type
TForm1 = class(TForm)
Button1: TButton;
Chk2000: TCheckBox;
Edit1: TEdit;
Button2: TButton;
Edit2: TEdit;
OpenDialog1: TOpenDialog;
Button3: TButton;
Label1: TLabel;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Edit2KeyPress(Sender: TObject; var Key: Char);
private
procedure WMDropFiles(var Msssage: TMessage); message WM_DROPFILES ;
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

CONST
xorString:array[0..12]of byte=
( $86, $FB, $EC, $37,
$5D, $44, $9C, $FA,
$C6, $5E, $28, $E6,$13 );
xorString2:array[0..20]of byte=
( $D3, $EC, $08, $9C,
$93, $28, $46, $8A,
$01, $7B, $A0, $DF,
$22, $13, $9A, $B1,
$61, $79, $C7, $7C,$5B);

procedure TForm1.WMDropFiles(var Msssage: TMessage);
begin
ShowMessage('Hello Boy');
end;
procedure TForm1.Button1Click(Sender: TObject);

VAR
passBuff: array[0..14]of byte;
pass: array[0..14]of char;
passBuff2: array[0..40]of byte;
pass2: array[0..20]of char;
B: Byte;
F:TFileStream;
I,j:integer;

begin
file://ShowMessage(Char($86) Char($F8) Char($EC))
if not FileExists(Edit1.Text) then
begin
MessageBox(Handle,'你是MM呀','我好种意你呀',MB_OK MB_ICONINFORMATION);
exit;
END;
F := TFileStream.Create(Edit1.text,fmOpenRead);
if not Chk2000.Checked then
begin
Try
F.Seek($42,soFromBeginning);
F.Read(PassBuff,14);
for i := 0 to 13 do
begin
B := PassBuff[i] XOR xorString[i];
Pass[i] := Char(B);
end;
pass[Sizeof(Pass)-1] := #0;
Edit2.Text := StrPas(Pass);
finally
f.Free;
end;
end
else
begin
try
F.Seek($42,soFromBeginning);
F.Read(passBuff2,40);
I:=0;j:=0;
while I<40 do
begin
B := passBuff2[i] xor xorString2[j];
pass2[j]:=char(B);
inc(i,2);inc(j);
end;
pass2[sizeof(pass2) - 1] := #0;
Edit2.Text:=StrPas(Pass2);
finally
f.Free;
end;
end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
if OpenDialog1.Execute then
Edit1.text := OpenDialog1.FileName;
end;

procedure TForm1.Button3Click(Sender: TObject);
VAR
passBuff: array[0..14]of byte;
pass: array[0..14]of char;
passBuff2: array[0..40]of byte;
pass2: array[0..20]of char;
B: Byte;
F:TFileStream;
I,j:integer;
s: string;
begin
file://ShowMessage(Char($86) Char($F8) Char($EC))
if not FileExists(Edit1.Text) then
begin
MessageBox(Handle,'你是MM呀','我好种意你呀',MB_OK MB_ICONINFORMATION);
exit;
END;
F := TFileStream.Create(Edit1.text,fmOpenWrite);
if not Chk2000.Checked then
begin
Try
FillChar(Pass,14,#0);
s := EdIt2.Text;
StrCopy(@Pass,Pchar(Trim(s)));
for i := 0 to 13 do
begin
B := Byte(Pass[i]);
PassBuff[i] := xorString[i] xor B;
end;
PassBuff[13] := $B6;
F.Seek($42,soFromBeginning);
F.Write(PassBuff,14);
finally
f.Free;
end;
end
else
begin
try
F.Seek($42,soFromBeginning);
F.Read(passBuff2,40);
I:=0;j:=0;
while I<40 do
begin
B := passBuff2[i] xor xorString2[j];
pass2[j]:=char(B);
inc(i,2);inc(j);
end;
pass2[sizeof(pass2) - 1] := #0;
Edit2.Text:=StrPas(Pass2);
finally
f.Free;
end;
end;

end;

procedure TForm1.Edit2KeyPress(Sender: TObject; var Key: Char);
begin
file://if length(Edit1.text) >= 13 then Key := #0;
end;

end.