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Abstain from GUI calls in rand_win.c in NT service context.

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This commit is contained in:
Andy Polyakov 2005-08-02 22:09:14 +00:00
parent 34be0bb1a5
commit 573969cd53
1 changed files with 20 additions and 28 deletions
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48
crypto/rand/rand_win.c
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@ -167,7 +167,7 @@ typedef DWORD (WINAPI *GETQUEUESTATUS)(UINT);
typedef HANDLE (WINAPI *CREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
typedef BOOL (WINAPI *CLOSETOOLHELP32SNAPSHOT)(HANDLE);
typedef BOOL (WINAPI *HEAP32FIRST)(LPHEAPENTRY32, DWORD, DWORD);
typedef BOOL (WINAPI *HEAP32FIRST)(LPHEAPENTRY32, DWORD, ULONG_PTR);
typedef BOOL (WINAPI *HEAP32NEXT)(LPHEAPENTRY32);
typedef BOOL (WINAPI *HEAP32LIST)(HANDLE, LPHEAPLIST32);
typedef BOOL (WINAPI *PROCESS32)(HANDLE, LPPROCESSENTRY32);
@ -195,21 +195,8 @@ int RAND_poll(void)
HCRYPTPROV hProvider = 0;
BYTE buf[64];
DWORD w;
HWND h;
int good = 0;
HMODULE advapi, kernel, user, netapi;
CRYPTACQUIRECONTEXTW acquire = 0;
CRYPTGENRANDOM gen = 0;
CRYPTRELEASECONTEXT release = 0;
#if 1 /* There was previously a problem with NETSTATGET. Currently, this
* section is still experimental, but if all goes well, this conditional
* will be removed
*/
NETSTATGET netstatget = 0;
NETFREE netfree = 0;
#endif /* 1 */
/* Determine the OS version we are on so we can turn off things
* that do not work properly.
*/
@ -246,17 +233,18 @@ int RAND_poll(void)
* implement own shim routine, which would accept ANSI argument
* and expand it to Unicode.
*/
{
/* load functions dynamically - not available on all systems */
advapi = LoadLibrary(TEXT("ADVAPI32.DLL"));
kernel = LoadLibrary(TEXT("KERNEL32.DLL"));
user = LoadLibrary(TEXT("USER32.DLL"));
netapi = LoadLibrary(TEXT("NETAPI32.DLL"));
HMODULE advapi = LoadLibrary(TEXT("ADVAPI32.DLL"));
HMODULE kernel = LoadLibrary(TEXT("KERNEL32.DLL"));
HMODULE user = NULL;
HMODULE netapi = LoadLibrary(TEXT("NETAPI32.DLL"));
CRYPTACQUIRECONTEXTW acquire = NULL;
CRYPTGENRANDOM gen = NULL;
CRYPTRELEASECONTEXT release = NULL;
NETSTATGET netstatget = NULL;
NETFREE netfree = NULL;
#if 1 /* There was previously a problem with NETSTATGET. Currently, this
* section is still experimental, but if all goes well, this conditional
* will be removed
*/
if (netapi)
{
netstatget = (NETSTATGET) GetProcAddress(netapi,"NetStatisticsGet");
@ -286,7 +274,6 @@ int RAND_poll(void)
if (netapi)
FreeLibrary(netapi);
#endif /* 1 */
/* It appears like this can cause an exception deep within ADVAPI32.DLL
* at random times on Windows 2000. Reported by Jeffrey Altman.
@ -394,7 +381,9 @@ int RAND_poll(void)
if (advapi)
FreeLibrary(advapi);
if (user)
if ((osverinfo.dwPlatformId != VER_PLATFORM_WIN32_NT ||
!OPENSSL_isservice()) &&
(user = LoadLibrary(TEXT("USER32.DLL"))))
{
GETCURSORINFO cursor;
GETFOREGROUNDWINDOW win;
@ -407,7 +396,7 @@ int RAND_poll(void)
if (win)
{
/* window handle */
h = win();
HWND h = win();
RAND_add(&h, sizeof(h), 0);
}
if (cursor)
@ -570,6 +559,7 @@ int RAND_poll(void)
FreeLibrary(kernel);
}
}
#endif /* !OPENSSL_SYS_WINCE */
/* timer data */
@ -633,8 +623,7 @@ int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
void RAND_screen(void) /* function available for backward compatibility */
{
RAND_poll();
if (GetVersion() >= 0x80000000 || !OPENSSL_isservice())
readscreen();
readscreen();
}
@ -710,6 +699,9 @@ static void readscreen(void)
int y; /* y-coordinate of screen lines to grab */
int n = 16; /* number of screen lines to grab at a time */
if (GetVersion() >= 0x80000000 || !OPENSSL_isservice())
return;
/* Create a screen DC and a memory DC compatible to screen DC */
hScrDC = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
hMemDC = CreateCompatibleDC(hScrDC);