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//! Randomness support.
use security_framework_sys::random::{SecRandomCopyBytes, SecRandomRef, kSecRandomDefault};
use std::io;
/// A source of random data.
pub struct SecRandom(SecRandomRef);
unsafe impl Sync for SecRandom {}
unsafe impl Send for SecRandom {}
impl Default for SecRandom {
#[inline(always)]
fn default() -> Self {
unsafe { Self(kSecRandomDefault) }
}
}
impl SecRandom {
/// Fills the buffer with cryptographically secure random bytes.
pub fn copy_bytes(&self, buf: &mut [u8]) -> io::Result<()> {
if unsafe { SecRandomCopyBytes(self.0, buf.len(), buf.as_mut_ptr().cast()) } == 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn basic() {
let mut buf = [0; 10];
SecRandom::default().copy_bytes(&mut buf).unwrap();
}
}
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