security_framework/
random.rs

1//! Randomness support.
2
3use security_framework_sys::random::{kSecRandomDefault, SecRandomCopyBytes, SecRandomRef};
4use std::io;
5
6/// A source of random data.
7pub struct SecRandom(SecRandomRef);
8
9unsafe impl Sync for SecRandom {}
10unsafe impl Send for SecRandom {}
11
12impl Default for SecRandom {
13    #[inline(always)]
14    fn default() -> Self {
15        unsafe { Self(kSecRandomDefault) }
16    }
17}
18
19impl SecRandom {
20    /// Fills the buffer with cryptographically secure random bytes.
21    pub fn copy_bytes(&self, buf: &mut [u8]) -> io::Result<()> {
22        if unsafe { SecRandomCopyBytes(self.0, buf.len(), buf.as_mut_ptr().cast()) } == 0 {
23            Ok(())
24        } else {
25            Err(io::Error::last_os_error())
26        }
27    }
28}
29
30#[cfg(test)]
31mod test {
32    use super::*;
33
34    #[test]
35    fn basic() {
36        let mut buf = [0; 10];
37        SecRandom::default().copy_bytes(&mut buf).unwrap();
38    }
39}
security_framework/random.rs

security_framework/
random.rs
