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;
11 use core::{ffi::c_void, ptr::null};
12
13 #[link(name = "Security", kind = "framework")]
14 extern "C" {
SecRandomCopyBytes(rnd: *const c_void, count: usize, bytes: *mut u8) -> i3215 fn SecRandomCopyBytes(rnd: *const c_void, count: usize, bytes: *mut u8) -> i32;
16 }
17
getrandom_inner(dest: &mut [u8]) -> Result<(), Error>18 pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
19 // Apple's documentation guarantees kSecRandomDefault is a synonym for NULL.
20 let ret = unsafe { SecRandomCopyBytes(null(), dest.len(), dest.as_mut_ptr()) };
21 if ret == -1 {
22 Err(Error::IOS_SEC_RANDOM)
23 } else {
24 Ok(())
25 }
26 }
27