Acquire Entropy for embedded platform

[Chitrang Srivastava]

Hi,

I am working on an embedded platform and now ported openssl 1.1.1b
TLS 1.2/1.3 is working fine.
While analysing random number , Rand pool initialization calls where I am
returning like this ,
size_t *rand_pool_acquire_entropy*(RAND_POOL *pool)
{
        return rand_pool_entropy_available(pool);
}
As noticed that *rand_unix.c* has an implementation wcih samples 2 bits of
RTC, would that give enough entropy or any other recommendation to have
enough entropy for embedded platforms?

Thanks,
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