"crypto/internal/fips140" "crypto/internal/randutil" "crypto/internal/sysrand" "io" "sync" ) var drbgs = sync.Pool{ New: func() any { var c *Counter entropy.Depleted(func(seed *[48]byte) { c = NewCounter(seed) }) return c }, } // Read fills b with cryptographically secure random bytes. In FIPS mode, it // uses an SP 800-90A Rev. 1 Deterministic Random Bit Generator (DRBG). // Otherwise, it uses the operating system's random number generator. func Read(b []byte) { if !fips140.Enabled { sysrand.Read(b) return } // At...