1 files changed, 27 insertions, 0 deletions
diff --git a/third_party/rust/getrandom/src/apple-other.rs b/third_party/rust/getrandom/src/apple-other.rs
new file mode 100644
index 0000000000..8f904859ca
--- /dev/null
+++ b/third_party/rust/getrandom/src/apple-other.rs
@@ -0,0 +1,27 @@
+// 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 iOS
+use crate::Error;
+use core::{ffi::c_void, mem::MaybeUninit, ptr::null};
+
+#[link(name = "Security", kind = "framework")]
+extern "C" {
+    fn SecRandomCopyBytes(rnd: *const c_void, count: usize, bytes: *mut u8) -> i32;
+}
+
+pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
+    // Apple's documentation guarantees kSecRandomDefault is a synonym for NULL.
+    let ret = unsafe { SecRandomCopyBytes(null(), dest.len(), dest.as_mut_ptr() as *mut u8) };
+    // errSecSuccess (from SecBase.h) is always zero.
+    if ret != 0 {
+        Err(Error::IOS_SEC_RANDOM)
+    } else {
+        Ok(())
+    }
+}