unit MainForm;

interface
{$H+}

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

type
  HANDLE = LongWord;

  TMainForm = class(TForm)
    MainMenu1: TMainMenu;
	File1:                 TMenuItem;
	Exit1:                 TMenuItem;
	Settings1:             TMenuItem;
	TargetUserID1:         TMenuItem;
	Passwordforreading1:   TMenuItem;
	Passwordforwriting1:   TMenuItem;
	Operations1:           TMenuItem;
	Open1:                 TMenuItem;
	Close1:                TMenuItem;
	Openfromlist1:         TMenuItem;
	RWbyindex1:            TMenuItem;
	N1:                    TMenuItem;
	Query1:                TMenuItem;
	SerialNo1:             TMenuItem;
	N2:                    TMenuItem;
	Setnewreadpassword1:   TMenuItem;
	Setnewwritepassword1:  TMenuItem;
	ClearOutput1:          TMenuItem;
	Memo1:           TMemo;

    procedure Exit1Click(Sender: TObject);
    procedure TargetUserID1Click(Sender: TObject);
    procedure Passwordforreading1Click(Sender: TObject);
    procedure Passwordforwriting1Click(Sender: TObject);
    procedure Open1Click(Sender: TObject);
    procedure Close1Click(Sender: TObject);
    procedure Openfromlist1Click(Sender: TObject);
    procedure RWbyindex1Click(Sender: TObject);
    procedure Query1Click(Sender: TObject);
    procedure SerialNo1Click(Sender: TObject);
    procedure Setnewreadpassword1Click(Sender: TObject);
    procedure Setnewwritepassword1Click(Sender: TObject);
    procedure ClearOutput1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
    hKey : THandle;
    UID : WORD ;
    szReadPswd : PassArray;
    szWritePswd : PassArray;
    szKeyPath : Array[0..MAX_PATH*2] of Char;

    LineCount : Integer;
    function TryOpen() : Boolean;

  public
    { Public declarations }
     procedure DisplayMessage(info: AnsiString);
  end;

var
  MainForm1: TMainForm;

implementation
uses Unit2,Unit3,Unit4,Unit5,Unit6;
{$R *.dfm}
function TMainForm.TryOpen() : Boolean;
Var
   info: String;
   HardSerial: array[0..20] of Char;
   rc :Boolean;
begin
    Result := False;

	if(hKey <> INVALID_HANDLE_VALUE) then
    begin
		rc := GetsChipSerial(hKey, @HardSerial, 16);
		if(rc) then
        begin
            info := Format('Old handle(0x%x) is still valid.', [hKey]);
            DisplayMessage(info);
			Result := true;
            Exit;
        end;

        info := Format('Old handle(0x%x) is not valid. Close it.', [hKey]);
        DisplayMessage(info);
        ClosesChip(hKey);
        hKey := INVALID_HANDLE_VALUE;
        Exit;
	end;

	hKey := OpensChip(UID, @szKeyPath);
	if(hKey = INVALID_HANDLE_VALUE) then
	begin
		info := Format('Err:	Can not find sChip of USERID = 0x%X', [UID]);
		DisplayMessage(info);
        Exit;
	end;
    Result := True;

    info := Format('Open a new handle value = 0x%x, and path = %s', [hKey, szKeyPath]);
	DisplayMessage(info);
end;

procedure TMainForm.DisplayMessage(info: AnsiString);
var
    x: AnsiString;
begin
    LineCount := LineCount + 1;
    x :=  IntToStr(LineCount) + ': ' + info;
    Memo1.Lines.Append(x);
end;

procedure TMainForm.Exit1Click(Sender: TObject);
begin
    if(hKey <> INVALID_HANDLE_VALUE) then
        ClosesChip(hKey);
        
    Close;
end;

procedure TMainForm.TargetUserID1Click(Sender: TObject);
var
    rc: integer;
    info: String;
begin
    Form2.UserID := UID;

    rc := Form2.ShowModal();
    if(rc = mrOk) then
    begin
        UID := Form2.UserID;

        info := Format('Current UserID is change to %04x', [UID]);
        DisplayMessage(info);
    end;
end;

procedure TMainForm.Passwordforreading1Click(Sender: TObject);
Var
    rc: Integer;
    info: String;
begin
    Form3.DialogType := 1;
    Form3.szPassword := szReadPswd;

    rc := Form3.ShowModal();
    if(rc = mrOk) then
    begin
        szReadPswd :=  Form3.szPassword;
        info := Format('Current Read Password of software is change to %02x%02x%02x%02x',
               [szReadPswd[0], szReadPswd[1], szReadPswd[2], szReadPswd[3]]);
        DisplayMessage(info);
    end;
end;

procedure TMainForm.Passwordforwriting1Click(Sender: TObject);
Var
    rc: Integer;
    info: String;
begin
    Form3.DialogType := 0;
    Form3.szPassword := szWritePswd;
    rc := Form3.ShowModal();
    if(rc = mrOk) then
    begin
        szWritePswd := Form3.szPassword;
        info := Format('Current write Password of software is change to %02x%02x%02x%02x',
               [szWritePswd[0], szWritePswd[1], szWritePswd[2], szWritePswd[3]]);

        DisplayMessage(info);
    end;
end;

procedure TMainForm.Open1Click(Sender: TObject);
begin
    TryOpen();
end;

procedure TMainForm.Close1Click(Sender: TObject);
Var
    info: String;
begin
    //
    info := Format('Close handle = $%x', [hKey]);
    ClosesChip(hKey);
    hKey := INVALID_HANDLE_VALUE;
    DisplayMessage(info);
end;

procedure TMainForm.Openfromlist1Click(Sender: TObject);
Var
    rc: Integer;
    info: String;
    Context: THandle;
    Store: array[0..MAX_PATH*16] of Char;
    szDevPaths: PChar;
    KeyPath: string;
begin
	if( CreateEnumsChipContext(@Context, UID) = 0) then
	begin
		CloseEnumsChipContext(Context);
		DisplayMessage('Err :	No sChip is attached!');
		Exit;
    end;

    szDevPaths := @Store;

    ListKeyForm.ListBox1.Clear();
	EnumsChipPaths(Context, szDevPaths);

	while( StrLen(szDevPaths) > 0 )  do
	begin
        info := szDevPaths;
        ListKeyForm.ListBox1.Items.Add(info);
		szDevPaths := szDevPaths + Strlen(szDevPaths) + 1;
	end;
	CloseEnumsChipContext(Context);

    rc := ListKeyForm.ShowModal();
    if(rc <> mrOk) then Exit;

	if(hKey <> 0) and (hKey <> INVALID_HANDLE_VALUE) then
	begin
        info := Format('Ok : Old Handle $%x = is closed.', [hKey]);
		ClosesChip(hKey);
		hKey := INVALID_HANDLE_VALUE;
		DisplayMessage(info);
	end;

    KeyPath := ListKeyForm.szPath;
    hKey := OpensChipByPath(PChar(KeyPath));
    if(hKey <> INVALID_HANDLE_VALUE) then
        info := Format('Open handle = 0x%x at path = %s', [hKey, KeyPath])
    else
        info := Format('Open fail at path = %s', [KeyPath]);

    DisplayMessage(info);
end;

procedure TMainForm.RWbyindex1Click(Sender: TObject);
begin
    Form5.hKey := hKey;
    Form5.szReadPswd := szReadPswd;
    Form5.szWritePswd := szWritePswd;
    Form5.ShowModal();
end;

procedure TMainForm.Query1Click(Sender: TObject);
begin
    Form6.hKey := hKey;
    Form6.ShowModal();
end;

procedure TMainForm.SerialNo1Click(Sender: TObject);
Var
    rc: Boolean;
    info: String;
    szSerial: array[0..20] of Char;
begin
    rc := GetsChipSerial(hKey, szSerial, 20);

    if(rc) then
        info := Format('serial no is %s.', [szSerial])
    else
        info := 'Err: get no serial no. Maybe key is absent.';

    DisplayMessage(info);
end;

procedure TMainForm.Setnewreadpassword1Click(Sender: TObject);
Var
    rc: Integer;
    info: String;
    NewPass: PassArray;
    ret: Boolean;
begin
    Form3.DialogType := Integer($80000001);
    rc := Form3.ShowModal();
    if(rc = mrOk) then
        NewPass := Form3.szPassword
    else
        Exit;

    if(NewPass[0] <> Byte($01)) then  //check type
    begin
        DisplayMessage('Err: Wrong password type.');
        Exit;
    end;

	ret := SetsChipPassword(hKey, @szWritePswd[0], @NewPass[0]);
    if(ret) then
	begin
        info := Format('Key''s read password is changed to %02x %02x %02x %02x',
            [NewPass[0], NewPass[1],  NewPass[2],  NewPass[3]]);
        DisplayMessage(info);
    end
    else
    	DisplayMessage('Err:	change read password failed.');

end;

procedure TMainForm.Setnewwritepassword1Click(Sender: TObject);
Var
    rc: Integer;
    info: String;
    NewPass: PassArray;
    ret: Boolean;
begin
    Form3.DialogType := Integer($80000000);
    rc := Form3.ShowModal();
    if(rc = mrOk) then
        NewPass := Form3.szPassword
    else
        Exit;

    if(NewPass[0] <> Byte($00)) then  //check type
    begin
        DisplayMessage('Err: Wrong password type.');
        Exit;
    end;

	ret := SetsChipPassword(hKey, @szWritePswd[0], @NewPass[0]);
    if(ret) then
	begin
        info := Format('Key''s write password is changed to %02x %02x %02x %02x',
            [NewPass[0], NewPass[1],  NewPass[2],  NewPass[3]]);
        DisplayMessage(info);
    end
    else
    	DisplayMessage('Err:	change write password failed.');
end;

procedure TMainForm.ClearOutput1Click(Sender: TObject);
begin
    //
    Memo1.Clear;
end;

procedure TMainForm.FormCreate(Sender: TObject);
var i : integer;
begin
    //
    hKey := INVALID_HANDLE_VALUE;
    UID := $ffff;

    for i := 0 to 3  do
    begin
       szReadPswd[i] := Byte($ff);
       szWritePswd[i] := Byte($ff);
    end;

    LineCount := 0;
end;

end.