Struct OsRng 

pub struct OsRng;

Available on crate feature std only.

Default RngProvider — delegates to getrandom and therefore to the OS’s CSPRNG on every supported target.

Zero-sized; cheap to construct. Hold a single instance per session (or wrap in Arc<dyn RngProvider> if you need to swap providers).

Implementations

impl OsRng

pub const fn new() -> Self

Construct a fresh OsRng. Equivalent to OsRng::default() / OsRng; the explicit constructor exists for symmetry with future providers that need configuration.

Trait Implementations

impl Clone for OsRng

fn clone(&self) -> OsRng

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for OsRng

impl Debug for OsRng

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for OsRng

fn default() -> OsRng

Returns the “default value” for a type.

impl RngProvider for OsRng

Available on non-crate feature fips only.

fn fill_bytes(&self, dest: &mut [u8])

Fill dest with cryptographically secure random bytes.

fn next_u64(&self) -> u64

Convenience: return a single fresh u64 of randomness.