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