rosapps/applications/screensavers/matrix/password.c

   1 //
   2 //      password.c
   3 //
   4 //      Password support for Win9x
   5 //
   6 #include <windows.h>
   7 #include <tchar.h>
   8
   9 typedef BOOL (WINAPI *VERIFYSCREENSAVEPWD)(HWND hwnd);
  10 typedef VOID (WINAPI *PWDCHANGEPASSWORD)(LPCTSTR lpcRegkeyname, HWND hwnd,UINT uiReserved1,UINT uiReserved2);
  11
  12 BOOL VerifyPassword(HWND hwnd)
  13 {
  14         // Under NT, we return TRUE immediately. This lets the saver quit,
  15         // and the system manages passwords. Under '95, we call VerifyScreenSavePwd.
  16         // This checks the appropriate registry key and, if necessary,
  17         // pops up a verify dialog
  18
  19         HINSTANCE                       hpwdcpl;
  20         VERIFYSCREENSAVEPWD VerifyScreenSavePwd;
  21         BOOL                            fResult;
  22
  23         if(GetVersion() < 0x80000000)
  24                 return TRUE;
  25
  26         hpwdcpl = LoadLibrary(_T("PASSWORD.CPL"));
  27
  28         if(hpwdcpl == NULL)
  29         {
  30                 return FALSE;
  31         }
  32
  33
  34         VerifyScreenSavePwd = (VERIFYSCREENSAVEPWD)GetProcAddress(hpwdcpl, "VerifyScreenSavePwd");
  35
  36         if(VerifyScreenSavePwd == NULL)
  37         {
  38                 FreeLibrary(hpwdcpl);
  39                 return FALSE;
  40         }
  41
  42         fResult = VerifyScreenSavePwd(hwnd);
  43         FreeLibrary(hpwdcpl);
  44
  45         return fResult;
  46 }
  47
  48 BOOL ChangePassword(HWND hwnd)
  49 {
  50         // This only ever gets called under '95, when started with the /a option.
  51         HINSTANCE hmpr = LoadLibrary(_T("MPR.DLL"));
  52         PWDCHANGEPASSWORD PwdChangePassword;
  53
  54         if(hmpr == NULL)
  55                 return FALSE;
  56
  57         PwdChangePassword = (PWDCHANGEPASSWORD)GetProcAddress(hmpr, "PwdChangePasswordA");
  58
  59         if(PwdChangePassword == NULL)
  60         {
  61                 FreeLibrary(hmpr);
  62                 return FALSE;
  63         }
  64
  65         PwdChangePassword(_T("SCRSAVE"), hwnd, 0, 0);
  66         FreeLibrary(hmpr);
  67
  68         return TRUE;
  69 }