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Rollup merge of #64372 - Wind-River:master, r=alexcrichton

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use randSecure and randABytes

r? @alexcrichton

cc @n-salim
This commit is contained in:
Mazdak Farrokhzad 2019-09-14 16:42:25 +02:00 committed by GitHub
commit 1e2a97018f
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1 changed files with 14 additions and 7 deletions
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21
src/libstd/sys/vxworks/rand.rs
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@ -14,17 +14,24 @@ pub fn hashmap_random_keys() -> (u64, u64) {
mod imp {
use libc;
use crate::io;
extern "C" {
fn randBytes (randBuf: *mut libc::c_uchar,
numOfBytes: libc::c_int) -> libc::c_int;
}
use core::sync::atomic::{AtomicBool, Ordering::Relaxed};
pub fn fill_bytes(v: &mut [u8]) {
static RNG_INIT: AtomicBool = AtomicBool::new(false);
while !RNG_INIT.load(Relaxed) {
let ret = unsafe { libc::randSecure() };
if ret < 0 {
panic!("couldn't generate random bytes: {}", io::Error::last_os_error());
} else if ret > 0 {
RNG_INIT.store(true, Relaxed);
break;
}
unsafe { libc::usleep(10) };
}
let ret = unsafe {
randBytes(v.as_mut_ptr() as *mut libc::c_uchar, v.len() as libc::c_int)
libc::randABytes(v.as_mut_ptr() as *mut libc::c_uchar, v.len() as libc::c_int)
};
if ret == -1 {
if ret < 0 {
panic!("couldn't generate random bytes: {}", io::Error::last_os_error());
}
}