1 // Copyright 2018 Developers of the Rand project.
2 //
3 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
4 // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
5 // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
6 // option. This file may not be copied, modified, or distributed
7 // except according to those terms.
8
9 //! Implementation for iOS
10 use crate::{error::SEC_RANDOM_FAILED, Error};
11
12 // TODO: Make extern once extern_types feature is stabilized. See:
13 // https://github.com/rust-lang/rust/issues/43467
14 #[repr(C)]
15 struct SecRandom([u8; 0]);
16
17 #[link(name = "Security", kind = "framework")]
18 extern "C" {
19 static kSecRandomDefault: *const SecRandom;
20
SecRandomCopyBytes(rnd: *const SecRandom, count: usize, bytes: *mut u8) -> i3221 fn SecRandomCopyBytes(rnd: *const SecRandom, count: usize, bytes: *mut u8) -> i32;
22 }
23
getrandom_inner(dest: &mut [u8]) -> Result<(), Error>24 pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
25 let ret = unsafe { SecRandomCopyBytes(kSecRandomDefault, dest.len(), dest.as_mut_ptr()) };
26 if ret == -1 {
27 Err(SEC_RANDOM_FAILED)
28 } else {
29 Ok(())
30 }
31 }
32