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Windows: Fix failure to launch keyfile generator in secure desktop mode

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Hooking is not allowed if thread is running in secure desktop so we ignore SetWindowsHookEx failure in this case and random generator will be initialized using the other entropy sources from the system.
This commit is contained in:
Mounir IDRASSI 2021-02-24 21:48:33 +01:00
parent 7efe4e4f2a
commit c1e81d9692
No known key found for this signature in database
GPG Key ID: 02C30AE90FAE4A6F
1 changed files with 6 additions and 2 deletions
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8
src/Common/Random.c
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@ -14,6 +14,7 @@
#include "Tcdefs.h"
#include "Crc.h"
#include "Random.h"
#include "Dlgcode.h"
#include "Crypto\cpu.h"
#include "Crypto\jitterentropy.h"
#include "Crypto\rdrand.h"
@ -96,6 +97,7 @@ HCRYPTPROV hCryptProv;
/* Init the random number generator, setup the hooks, and start the thread */
int RandinitWithCheck ( int* pAlreadyInitialized)
{
BOOL bIgnoreHookError = FALSE;
DWORD dwLastError = ERROR_SUCCESS;
if (GetMaxPkcs5OutSize() > RNG_POOL_SIZE)
TC_THROW_FATAL_EXCEPTION;
@ -129,11 +131,13 @@ int RandinitWithCheck ( int* pAlreadyInitialized)
VirtualLock (pRandPool, RANDOMPOOL_ALLOCSIZE);
}
bIgnoreHookError = IsThreadInSecureDesktop(GetCurrentThreadId());
hKeyboard = SetWindowsHookEx (WH_KEYBOARD, (HOOKPROC)&KeyboardProc, NULL, GetCurrentThreadId ());
if (hKeyboard == 0) handleWin32Error (0, SRC_POS);
if (hKeyboard == 0 && !bIgnoreHookError) handleWin32Error (0, SRC_POS);
hMouse = SetWindowsHookEx (WH_MOUSE, (HOOKPROC)&MouseProc, NULL, GetCurrentThreadId ());
if (hMouse == 0)
if (hMouse == 0 && !bIgnoreHookError)
{
handleWin32Error (0, SRC_POS);
goto error;