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
