tink_core/subtle/
random.rs

1// Copyright 2020 The Tink-Rust Authors
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////////////////////////////////////////////////////////////////////////////////
16
17//! Utilities for random data.
18
19use rand::{thread_rng, Rng};
20
21/// Return a vector of the given `size` filled with random bytes.
22pub fn get_random_bytes(size: usize) -> Vec<u8> {
23    let mut data = vec![0u8; size];
24    thread_rng().fill(&mut data[..]);
25    data
26}
27
28/// Randomly generate an unsigned 32-bit integer.
29pub fn get_random_uint32() -> u32 {
30    thread_rng().gen()
31}