int qcrypto_random_init(Error **errp)
{
#ifndef _WIN32
/* TBD perhaps also add support for BSD getentropy / Linux
* getrandom syscalls directly */
fd = open("/dev/urandom", O_RDONLY);
if (fd == -1 && errno == ENOENT) {
fd = open("/dev/random", O_RDONLY);
}
if (fd < 0) {
error_setg(errp, "No /dev/urandom or /dev/random found");
return -1;
}
#else
if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL,
CRYPT_SILENT | CRYPT_VERIFYCONTEXT)) {
error_setg_win32(errp, GetLastError(),
"Unable to create cryptographic provider");
return -1;
}
#endif
return 0;
}
/* Call VSS requester and freeze/thaw filesystems and applications */
void qga_vss_fsfreeze(int *nr_volume, Error **errp, bool freeze)
{
const char *func_name = freeze ? "requester_freeze" : "requester_thaw";
QGAVSSRequesterFunc func;
ErrorSet errset = {
.error_setg_win32 = error_setg_win32_internal,
.errp = errp,
};
g_assert(errp); /* requester.cpp requires it */
func = (QGAVSSRequesterFunc)GetProcAddress(provider_lib, func_name);
if (!func) {
error_setg_win32(errp, GetLastError(), "failed to load %s from %s",
func_name, QGA_VSS_DLL);
return;
}
func(nr_volume, &errset);
}
