|  | /* Copyright (c) 2023, Google Inc. | 
|  | * | 
|  | * Permission to use, copy, modify, and/or distribute this software for any | 
|  | * purpose with or without fee is hereby granted, provided that the above | 
|  | * copyright notice and this permission notice appear in all copies. | 
|  | * | 
|  | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | 
|  | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | 
|  | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | 
|  | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | 
|  | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | 
|  | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | 
|  | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | 
|  | */ | 
|  |  | 
|  | pub(crate) fn decode_hex<const N: usize>(s: &str) -> [u8; N] { | 
|  | (0..s.len()) | 
|  | .step_by(2) | 
|  | .map(|i| u8::from_str_radix(&s[i..i + 2], 16).expect("Invalid hex string")) | 
|  | .collect::<Vec<u8>>() | 
|  | .as_slice() | 
|  | .try_into() | 
|  | .unwrap() | 
|  | } | 
|  |  | 
|  | pub(crate) fn decode_hex_into_vec(s: &str) -> Vec<u8> { | 
|  | (0..s.len()) | 
|  | .step_by(2) | 
|  | .map(|i| u8::from_str_radix(&s[i..i + 2], 16).expect("Invalid hex string")) | 
|  | .collect::<Vec<u8>>() | 
|  | } |