though entropy could be provided in the additional input". additionalInput := new([SeedSize]byte) sysrand.Read(additionalInput[:16]) drbg := drbgInstance.Swap(nil) if drbg == nil { drbg = drbgPool.Get().(*Counter) } defer func() { if !drbgInstance.CompareAndSwap(nil, drbg) { drbgPool.Put(drbg) } }() for len(b) > 0 { size := min(len(b), maxRequestSize) if reseedRequired := drbg.Generate(b[:size], additionalInput); reseedRequired { // See SP 800-90A Rev. 1, Section 9.3.1, Steps 6-8, as explained in // Section...