unit uEnCode;
interface
uses
  SysUtils, libc, Types, Classes, Variants, QTypes, QGraphics, QControls, QForms,
  QDialogs, QStdCtrls, SQLite3, SQLiteTable3, uPublic, QButtons, QExtCtrls,
  QMenus;
type
  TFrmEnCode = class(TForm)
    BitBtn1: TBitBtn;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit2: TEdit;
    Edit3: TEdit;
    BitBtn2: TBitBtn;
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure CRC_CPCC(var pucData: TResultByteArray; nLen: integer;var pCRC: string);
    procedure CALC_CODE();
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
    procedure Edit1KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure Edit2KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure Edit3KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  FrmEnCode: TFrmEnCode;
  fStream : TFILESTREAM;
  userDB : TSQLiteDatabase;
  userTB : TSQLiteTable;  
implementation
uses uDM, DESCrypt;
{$R *.xfm}

procedure TFrmEnCode.Button2Click(Sender: TObject);
begin
  close;
end;

procedure TFrmEnCode.FormCreate(Sender: TObject);
begin
  edit1.SetFocus;
end;


procedure TFrmEnCode.CRC_CPCC(var pucData: TResultByteArray; nLen: integer;
  var pCRC: string);
var
  CRC16Lo, CRC16Hi, CH, CL, SaveHi, SaveLo, i, j: byte;

begin

  CRC16Lo := 0; // pCRC-(pCRC div 256)*256;
  CRC16Hi := 0; //(pCRC div 256);
  ch := $A0;
  cl := $01;

  for i := 0 to nLen - 1 do
  begin
    CRC16Lo := CRC16Lo xor (pucData[i]);
    for j := 0 to 7 do
    begin
      SaveHi := CRC16Hi;
      SaveLo := CRC16Lo;
      CRC16Hi := CRC16Hi shr 1;
      CRC16Lo := CRC16Lo shr 1;
      if (SaveHi and $01) = $01 then
        CRC16Lo := CRC16Lo or $80;
      if (SaveLo and $01) = $01 then
      begin
        CRC16Hi := CRC16Hi xor CH;
        CRC16Lo := CRC16Lo xor CL;
      end;
    end;
  end;
  pCRC := IntToHex(CRC16hi, 2) + IntToHex(CRC16Lo, 2);

end;


procedure TFrmEnCode.CALC_CODE();
var
  AR: TResultByteArray;
  CRC: string;
  nCode: INTEGER;
  nTmp: INTEGER;
  _code: string;
  date: string;
  i: integer;
  C: array[1..4] of INTEGER;
begin

    SetLength(ar, 10);
    ar[0] := $BD;
    ar[1] := $6E;
    ar[2] := $3F;
    ar[3] := $91;
    ar[4] := $4C;
    ar[5] := $2A;


    date := formatdatetime('yyyyMMdd', now);

    ar[6] := StrToInt('$' + copy(date, 1, 2));
    ar[7] := StrToInt('$' + copy(date, 3, 2));
    ar[8] := StrToInt('$' + copy(date, 5, 2));
    ar[9] := StrToInt('$' + copy(date, 7, 2));

    CRC_CPCC(ar, length(ar), CRC);

    nTmp := StrToInt(copy(date, 8, 1));
    nTmp := nTmp mod 2;

    for i := 1 to 4 do
    begin
      c[i] := StrToInt('$' + copy(CRC, i, 1));
      if c[i] > 9 then
      begin
        if nTmp = 0 then
        begin
          c[i] := c[i] - 6;
        end
        else
        begin
          c[i] := c[i] - 9;
        end;

      end;
    end;


    CRC := IntToStr(c[1])
          +IntToStr(c[2])
          +IntToStr(c[3])
          +IntToStr(c[4]);

     edit1.Text := CRC;

end;



procedure TFrmEnCode.BitBtn1Click(Sender: TObject);
var
 buffer : array[1..100] of char;
 str : string;
begin
{
  fStream := TFILESTREAM.Create('code.dat',fmOpenReadWrite);
  fStream.Position := 0;
  fStream.Read(buffer,fStream.Size);

  if fStream.size = 0 then
  begin
    str := '';
  end
  else
  begin
    str := StrPas(@buffer);
  end;

  FreeAndNil(fStream);
  }

  userDB := TSQLiteDatabase.Create(AnsiToUTF8(_GetDBPath + 'code.db'));
  userTB := userDB.GetTable('select password from user where name = 1001 ');

  if userTB.RowCount = 0 then
  begin
    str := '';
  end
  else
  begin
    str := userTB.FieldByName['password'];
  end;

  if (edit1.Text <> str) or (str = '') then
  begin
    _MsgError('密码错误！');
    exit;
  end
  else
  begin
    if (edit2.Text <> '') and (edit2.Text = edit3.Text) then
    begin
    {
      fStream := TFILESTREAM.Create('code.dat',fmOpenReadWrite);
      fStream.Position := 0;
      str "= edit2.Text;
      strPCopy(@buffer,str);
      fStream.Write(buffer,length(str));
       }
      userDB.ExecSQL('update user set password = ''' + edit2.Text + ''' where name = 1001');
      _MsgError('密码修改成功');
      close;
    end
    else
    begin
      if edit2.Text = '' then
      begin
        _MsgError('新密码不能为空');
      end
      else
      begin
        _MsgError('新密码输入不一致');
      end;
      exit;
    end;

  end;

end;

procedure TFrmEnCode.BitBtn2Click(Sender: TObject);
begin
  close;
end;

procedure TFrmEnCode.Edit1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if (key = 4100) or (key = 4101) then
    BitBtn1.Click;
  if key = 4096 then
    BitBtn2.Click;
end;

procedure TFrmEnCode.Edit2KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if (key = 4100) or (key = 4101) then
    BitBtn1.Click;
  if key = 4096 then
    BitBtn2.Click;
end;

procedure TFrmEnCode.Edit3KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if (key = 4100) or (key = 4101) then
    BitBtn1.Click;
  if key = 4096 then
    BitBtn2.Click;
end;

end.
.