blob: a2fe52ada8513ead53dc43f3adb5a74f8568c303 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
// Copyright 2018 Developers of the Rand project.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Implementation for VxWorks
use crate::error::{Error, RAND_SECURE_FATAL};
use crate::util_libc::last_os_error;
use core::sync::atomic::{AtomicBool, Ordering::Relaxed};
pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
static RNG_INIT: AtomicBool = AtomicBool::new(false);
while !RNG_INIT.load(Relaxed) {
let ret = unsafe { libc::randSecure() };
if ret < 0 {
return Err(RAND_SECURE_FATAL);
} else if ret > 0 {
RNG_INIT.store(true, Relaxed);
break;
}
unsafe { libc::usleep(10) };
}
// Prevent overflow of i32
for chunk in dest.chunks_mut(i32::max_value() as usize) {
let ret = unsafe { libc::randABytes(chunk.as_mut_ptr(), chunk.len() as i32) };
if ret != 0 {
return Err(last_os_error());
}
}
Ok(())
}
|
