Struct Rand 

pub struct Rand;

Zero-size type with static methods wrapping RAND_bytes / RAND_priv_bytes.

Implementations

impl Rand

pub fn fill(buf: &mut [u8]) -> Result<(), ErrorStack>

Fill buf with cryptographically random bytes.

Zero-copy: writes directly into the caller’s buffer.

Panics

Panics if buf.len() > i32::MAX.

Errors

Returns Err if the PRNG fails (e.g. not seeded).

pub fn fill_private(buf: &mut [u8]) -> Result<(), ErrorStack>

Fill buf with private (non-predictable) random bytes.

Panics

Panics if buf.len() > i32::MAX.

Errors

pub fn bytes(n: usize) -> Result<Vec<u8>, ErrorStack>

Allocate and fill a Vec<u8> of n random bytes.

Prefer fill when the destination buffer is already allocated.

Errors

pub fn bytes_private(n: usize) -> Result<Vec<u8>, ErrorStack>

Allocate and fill a Vec<u8> of n private random bytes.

Equivalent to bytes but uses RAND_priv_bytes — suitable for key material and other values that must not be disclosed.

Errors