FYI -
RAND_bytes(buf, bytes) receives correct parameters as bytes=256 for SHA256.
int RAND_bytes(unsigned char *buf, int num)
{
const RAND_METHOD *meth = RAND_get_rand_method();
if (meth && meth->bytes)
{
Print(L" control is here\n");/////<---controll is here
return meth->bytes(buf,num);
}
Print(L" RAND_bytes fails\n");
return(-1);
}
On Tue, Aug 13, 2013 at 3:35 PM, baban devkate <baban...@gmail.com> wrote:
> Hello,
>
> RAND_bytes() will use the proper OS-provided RNG e.g. /dev/urandom or
> /dev/randomon Linux and CryptGenRandom() on Windows.
>
> I want to know how it works in Pre-boot environement?
>
> In pre-boot environment, if RAND_bytes() returns zero then what does it
> mean?
>
> Is it because PRNG is not properly seeded? If yes, how to resolve it?
>
>
> ~Baban
>
