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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 | ||
21 | fn SecRandomCopyBytes(rnd: *const SecRandom, count: usize, bytes: *mut u8) -> i32; | |
22 | } | |
23 | ||
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 | } |