void noise_get_heavy(void (*func) (void *, int))
{
HANDLE srch;
WIN32_FIND_DATA finddata;
DWORD pid;
HCRYPTPROV crypt_provider;
char winpath[MAX_PATH + 3];
GetWindowsDirectory(winpath, sizeof(winpath));
strcat(winpath, "\\*");
srch = FindFirstFile(winpath, &finddata);
if (srch != INVALID_HANDLE_VALUE) {
do {
func(&finddata, sizeof(finddata));
} while (FindNextFile(srch, &finddata));
FindClose(srch);
}
pid = GetCurrentProcessId();
func(&pid, sizeof(pid));
if (!wincrypt_module) {
wincrypt_module = load_system32_dll("advapi32.dll");
GET_WINDOWS_FUNCTION(wincrypt_module, CryptAcquireContextA);
GET_WINDOWS_FUNCTION(wincrypt_module, CryptGenRandom);
GET_WINDOWS_FUNCTION(wincrypt_module, CryptReleaseContext);
}
if (wincrypt_module && p_CryptAcquireContextA &&
p_CryptGenRandom && p_CryptReleaseContext &&
p_CryptAcquireContextA(&crypt_provider, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT)) {
BYTE buf[32];
if (p_CryptGenRandom(crypt_provider, 32, buf)) {
func(buf, sizeof(buf));
}
p_CryptReleaseContext(crypt_provider, 0);
}
read_random_seed(func);
/* Update the seed immediately, in case another instance uses it. */
random_save_seed();
}
bool win_read_random(void *buf, unsigned wanted)
{
bool toret = false;
HCRYPTPROV crypt_provider;
if (!wincrypt_module) {
wincrypt_module = load_system32_dll("advapi32.dll");
GET_WINDOWS_FUNCTION(wincrypt_module, CryptAcquireContextA);
GET_WINDOWS_FUNCTION(wincrypt_module, CryptGenRandom);
GET_WINDOWS_FUNCTION(wincrypt_module, CryptReleaseContext);
}
if (wincrypt_module && p_CryptAcquireContextA &&
p_CryptGenRandom && p_CryptReleaseContext &&
p_CryptAcquireContextA(&crypt_provider, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT)) {
toret = p_CryptGenRandom(crypt_provider, wanted, buf);
p_CryptReleaseContext(crypt_provider, 0);
}
return toret;
}