xref: /aosp_15_r20/system/security/mls/mls-rs-crypto-boringssl/src/test_helpers.rs (revision e1997b9af69e3155ead6e072d106a0077849ffba)
1 // Copyright 2024, 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 
decode_hex<const N: usize>(s: &str) -> [u8; N]15 pub(crate) fn decode_hex<const N: usize>(s: &str) -> [u8; N] {
16     (0..s.len())
17         .step_by(2)
18         .map(|i| u8::from_str_radix(&s[i..i + 2], 16).expect("Invalid hex string"))
19         .collect::<Vec<u8>>()
20         .as_slice()
21         .try_into()
22         .unwrap()
23 }
24