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8th
Фев

Сделать авторизацию пользователя в программе

Posted by Chas under Delphi

Но можно ли сделать INputbox с полем ввода стиля password. Просто делаю запрос пароля а отдельную форму делать 1)лень 2) лишний мусор.

GunSmoker
Если устроит условие Windows XP и выше, то есть отличная функа:

function LoginUser(const ACaption, ADescription: String; var AUser, APassword: string; var ASavePassword: Boolean): Boolean;

type

  PCredUIInfo = ^TCredUIInfo;

  TCredUIInfo = record

    cbSize: DWORD;

    hwndParent: HWND;

    pszMessageText: PChar;

    pszCaptionText: PChar;

    hbmBanner: HBITMAP;

  end;
var

  Lib: HMODULE;

  CredUIPromptForCredentials: function(pUiInfo: PCredUIInfo; pszTargetName: PChar; pContext: Pointer; dwAuthError: DWORD; pszUserName: PChar; ulUserNameBufferSize: ULONG; pszPassword: PChar; ulPasswordBufferSize: ULONG; var save: BOOL; dwFlags: DWORD): DWORD; stdcall;

  CredInfo: TCredUIInfo;

  User, Password: String;

  Save: BOOL;

const

  MAXBUFLEN                                = 10240;  // maximum login and password length in chars

  credui                                   = 'credui.dll';

  CredUIPromptForCredentialsName           = {$IFDEF UNICODE}

                                             'CredUIPromptForCredentialsW'

                                             {$ELSE}

                                             'CredUIPromptForCredentialsA'

                                             {$ENDIF};

  CREDUI_FLAGS_INCORRECT_PASSWORD          = $00001; // indicates the username is valid, but password is not

  CREDUI_FLAGS_DO_NOT_PERSIST              = $00002; // Do not show "Save" checkbox, and do not persist credentials

  CREDUI_FLAGS_REQUEST_ADMINISTRATOR       = $00004; // Populate list box with admin accounts

  CREDUI_FLAGS_EXCLUDE_CERTIFICATES        = $00008; // do not include certificates in the drop list

  CREDUI_FLAGS_REQUIRE_CERTIFICATE         = $00010;

  CREDUI_FLAGS_SHOW_SAVE_CHECK_BOX         = $00040;

  CREDUI_FLAGS_ALWAYS_SHOW_UI              = $00080;

  CREDUI_FLAGS_REQUIRE_SMARTCARD           = $00100;

  CREDUI_FLAGS_PASSWORD_ONLY_OK            = $00200;

  CREDUI_FLAGS_VALIDATE_USERNAME           = $00400;

  CREDUI_FLAGS_COMPLETE_USERNAME           = $00800;

  CREDUI_FLAGS_PERSIST                     = $01000; // Do not show "Save" checkbox, but persist credentials anyway

  CREDUI_FLAGS_SERVER_CREDENTIAL           = $04000;

  CREDUI_FLAGS_EXPECT_CONFIRMATION         = $20000; // do not persist unless caller later confirms credential via CredUIConfirmCredential() api

  CREDUI_FLAGS_GENERIC_CREDENTIALS         = $40000; // Credential is a generic credential

  CREDUI_FLAGS_USERNAME_TARGET_CREDENTIALS = $80000; // Credential has a username as the target

  CREDUI_FLAGS_KEEP_USERNAME               = $100000; // don't allow the user to change the supplied username

begin

  Lib := SafeLoadLibrary(credui);

  if Lib <> 0 then

  try

    CredUIPromptForCredentials := GetProcAddress(Lib, CredUIPromptForCredentialsName);

    if Assigned(CredUIPromptForCredentials) then

    begin

      FillChar(CredInfo, SizeOf(CredInfo), 0);

      CredInfo.cbSize := SizeOf(CredInfo);

      if Screen.FocusedForm <> nil then

        CredInfo.hwndParent := Screen.FocusedForm.Handle

      else if Screen.ActiveForm <> nil then

        CredInfo.hwndParent := Screen.ActiveForm.Handle

      else

        CredInfo.hwndParent := 0;

      CredInfo.pszCaptionText := PChar(ACaption);

      CredInfo.pszMessageText := PChar(ADescription);

      User := AUser + #0;

      Password := APassword + #0;

      Save := ASavePassword;

      SetLength(User, MAXBUFLEN);

      SetLength(Password, MAXBUFLEN);

      case CredUIPromptForCredentials(@CredInfo, nil, nil, 0, PChar(User), MAXBUFLEN, PChar(Password), MAXBUFLEN, Save, CREDUI_FLAGS_ALWAYS_SHOW_UI or CREDUI_FLAGS_DO_NOT_PERSIST or CREDUI_FLAGS_SHOW_SAVE_CHECK_BOX or CREDUI_FLAGS_GENERIC_CREDENTIALS) of

        NO_ERROR:

        begin

          AUser := PChar(User);

          APassword := PChar(Password);

          ASavePassword := Save;

          Result := True;

          Exit;

        end;

        ERROR_CANCELLED:

        begin

          Result := False;

          Exit;

        end;

      else

        raise Exception.Create('CredUIPromptForCredentials failed');

      end;

    end

    else

      RaiseLastOSError;

  finally

    FreeLibrary(Lib);

  end;

end;
procedure TForm1.Button1Click(Sender: TObject);

var

  Login, Password: String;

  SavePassword: Boolean;

begin

  if not LoginUser('Вход в программу', 'Введите данные вашей учётки:', Login, Password, SavePassword) then

    Exit;
  if (Login <> 'aaa') and

     (Password <> 'bbb') then

    raise Exception.Create('Invalid login or password');
  // OK!

end;