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