pub fn random_bytes(len: usize) -> Vec<u8> ⓘExpand description
Generate len cryptographically secure random bytes.
Uses the operating system’s CSPRNG via the getrandom crate.
Returns an empty Vec if len is 0.
§Panics
Panics if the OS random number generator fails, which should only happen in extremely unusual circumstances (e.g., very early boot on a system with no entropy sources).