Thanks for the suggestionb but the RAND_poll function already
pulls from the system right after the big #if 0 block as described
below in the stetup for the calls.....
if (advapi)
{
/*
* If it's available, then it's available in both ANSI
* and UNICODE flavors even in Win9x, documentation
says.
* We favor Unicode...
*/
acquire = (CRYPTACQUIRECONTEXTW) GetProcAddress(advapi,
"CryptAcquireContextW");
gen = (CRYPTGENRANDOM) GetProcAddress(advapi,
"CryptGenRandom");
release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi,
"CryptReleaseContext");
}
So, still looking for other suggestions.
I also tried finding an EGD for Win NT 4.0 and the only one that looked
promising was EGADS which is no longer available.
Thanks Again for any suggestions,
Ray
> Hello,
> Why not grab some entropy from the system entropy provider?
>
> #include <wincrypt.h>
> bool GetSysEntropy(void *ptr, int len)
> {
> char namebuf[512];
> HCRYPTPROV handle;
> DWORD count=500;
>
> if(!CryptGetDefaultProvider(PROV_RSA_FULL, NULL,
CRYPT_MACHINE_DEFAULT,
> namebuf, &count)) return false;
>
> if(!CryptAcquireContext(&handle, NULL, namebuf, PROV_RSA_FULL,
> CRYPT_VERIFYCONTEXT|CRYPT_SILENT)) return false;
>
> if(!CrytpGenRandom(handle, len (BYTE *) ptr))
> {
> CryptReleaseContext(handle, 0);
> return false;
> }
>
> CryptReleaseContext(handle, 0);
> return true;
> }
>
> DS
>
> >
> > The Windows NT 4.0 system has the workstation service stopped.
> >
> > This causes the following snippet from rand_win.c to return 0
> >
> > if (netstatget(NULL, L"LanmanWorkstation", 0, 0,
> > &outbuf) == 0)
> > {
> > RAND_add(outbuf, sizeof(STAT_WORKSTATION_0),
> > 45);
> > netfree(outbuf);
> > }
> >
> > Add to this a large section of calls are #if 0 out due to a reported
> > problem
> > by Wolfgang Marczy and there isn't many places this function gets
> > entropy
> > from.
> >
> > Any suggestions?
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