1 // Copyright 2023, The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //     http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 //! Wrappers of the randon number generations functions in BoringSSL rand.h.
16 
17 use crate::util::check_int_result;
18 use bssl_avf_error::{ApiName, Result};
19 use bssl_sys::RAND_bytes;
20 
21 /// Fills the given `dest` with random data.
rand_bytes(dest: &mut [u8]) -> Result<()>22 pub fn rand_bytes(dest: &mut [u8]) -> Result<()> {
23     // SAFETY: This function only writes to the given buffer within its bounds.
24     let ret = unsafe { RAND_bytes(dest.as_mut_ptr(), dest.len()) };
25     check_int_result(ret, ApiName::RAND_bytes)
26 }
27