// Initializes IV and whitening values for sector encryption/decryption in CBC mode.
// IMPORTANT: This function has been deprecated (legacy).
static void
InitSectorIVAndWhitening (unsigned __int64 unitNo,
int blockSize,
unsigned __int32 *iv,
unsigned __int64 *ivSeed,
unsigned __int32 *whitening)
{
/* IMPORTANT: This function has been deprecated (legacy) */
unsigned __int64 iv64[4];
unsigned __int32 *iv32 = (unsigned __int32 *) iv64;
iv64[0] = ivSeed[0] ^ LE64(unitNo);
iv64[1] = ivSeed[1] ^ LE64(unitNo);
iv64[2] = ivSeed[2] ^ LE64(unitNo);
if (blockSize == 16)
{
iv64[3] = ivSeed[3] ^ LE64(unitNo);
}
iv[0] = iv32[0];
iv[1] = iv32[1];
switch (blockSize)
{
case 16:
// 128-bit block
iv[2] = iv32[2];
iv[3] = iv32[3];
whitening[0] = LE32( crc32int ( &iv32[4] ) ^ crc32int ( &iv32[7] ) );
whitening[1] = LE32( crc32int ( &iv32[5] ) ^ crc32int ( &iv32[6] ) );
break;
case 8:
// 64-bit block
whitening[0] = LE32( crc32int ( &iv32[2] ) ^ crc32int ( &iv32[5] ) );
whitening[1] = LE32( crc32int ( &iv32[3] ) ^ crc32int ( &iv32[4] ) );
break;
default:
GST_THROW_FATAL_EXCEPTION;
}
}
/* Capture the keyboard, as long as the event is not the same as the last two
events, add the crc of the event to the pool along with the crc of the time
difference between this event and the last. The role of CRC-32 is merely to
perform diffusion. Note that the output of CRC-32 is subsequently processed
using a cryptographically secure hash algorithm. */
LRESULT CALLBACK KeyboardProc (int nCode, WPARAM wParam, LPARAM lParam)
{
static int lLastKey, lLastKey2;
static DWORD dwLastTimer;
int nKey = (lParam & 0x00ff0000) >> 16;
int nCapture = 0;
if (nCode < 0)
return CallNextHookEx (hMouse, nCode, wParam, lParam);
if ((lParam & 0x0000ffff) == 1 && !(lParam & 0x20000000) &&
(lParam & 0x80000000))
{
if (nKey != lLastKey)
nCapture = 1; /* Capture this key */
else if (nKey != lLastKey2)
nCapture = 1; /* Allow for one repeat */
}
if (nCapture)
{
DWORD dwTimer = GetTickCount ();
DWORD j = dwLastTimer - dwTimer;
unsigned __int32 timeCrc = 0L;
int i;
dwLastTimer = dwTimer;
lLastKey2 = lLastKey;
lLastKey = nKey;
for (i = 0; i < 4; i++)
{
timeCrc = UPDC32 (((unsigned char *) &j)[i], timeCrc);
}
for (i = 0; i < 4; i++)
{
timeCrc = UPDC32 (((unsigned char *) &dwTimer)[i], timeCrc);
}
EnterCriticalSection (&critRandProt);
RandaddInt32 ((unsigned __int32) (crc32int(&lParam) + timeCrc));
LeaveCriticalSection (&critRandProt);
}
return CallNextHookEx (hMouse, nCode, wParam, lParam);
}
