aboutsummaryrefslogtreecommitdiff
path: root/src/bsd_arandom.rs
diff options
context:
space:
mode:
Diffstat (limited to 'src/bsd_arandom.rs')
-rw-r--r--src/bsd_arandom.rs39
1 files changed, 16 insertions, 23 deletions
diff --git a/src/bsd_arandom.rs b/src/bsd_arandom.rs
index d441212..6e133d8 100644
--- a/src/bsd_arandom.rs
+++ b/src/bsd_arandom.rs
@@ -1,16 +1,11 @@
-// 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 FreeBSD and NetBSD
-use crate::{util_libc::sys_fill_exact, Error};
-use core::ptr;
+use crate::{
+ util_libc::{sys_fill_exact, Weak},
+ Error,
+};
+use core::{mem::MaybeUninit, ptr};
-fn kern_arnd(buf: &mut [u8]) -> libc::ssize_t {
+fn kern_arnd(buf: &mut [MaybeUninit<u8>]) -> libc::ssize_t {
static MIB: [libc::c_int; 2] = [libc::CTL_KERN, libc::KERN_ARND];
let mut len = buf.len();
let ret = unsafe {
@@ -30,20 +25,18 @@ fn kern_arnd(buf: &mut [u8]) -> libc::ssize_t {
}
}
-pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
- // getrandom(2) was introduced in FreeBSD 12.0 and NetBSD 10.0
- #[cfg(target_os = "freebsd")]
- {
- use crate::util_libc::Weak;
- static GETRANDOM: Weak = unsafe { Weak::new("getrandom\0") };
- type GetRandomFn =
- unsafe extern "C" fn(*mut u8, libc::size_t, libc::c_uint) -> libc::ssize_t;
+type GetRandomFn = unsafe extern "C" fn(*mut u8, libc::size_t, libc::c_uint) -> libc::ssize_t;
- if let Some(fptr) = GETRANDOM.ptr() {
- let func: GetRandomFn = unsafe { core::mem::transmute(fptr) };
- return sys_fill_exact(dest, |buf| unsafe { func(buf.as_mut_ptr(), buf.len(), 0) });
- }
+pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
+ // getrandom(2) was introduced in FreeBSD 12.0 and NetBSD 10.0
+ static GETRANDOM: Weak = unsafe { Weak::new("getrandom\0") };
+ if let Some(fptr) = GETRANDOM.ptr() {
+ let func: GetRandomFn = unsafe { core::mem::transmute(fptr) };
+ return sys_fill_exact(dest, |buf| unsafe {
+ func(buf.as_mut_ptr() as *mut u8, buf.len(), 0)
+ });
}
+
// Both FreeBSD and NetBSD will only return up to 256 bytes at a time, and
// older NetBSD kernels will fail on longer buffers.
for chunk in dest.chunks_mut(256) {