diff options
Diffstat (limited to 'src/bsd_arandom.rs')
-rw-r--r-- | src/bsd_arandom.rs | 39 |
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) { |